CN108560562A - A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill - Google Patents
A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill Download PDFInfo
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- CN108560562A CN108560562A CN201810506930.2A CN201810506930A CN108560562A CN 108560562 A CN108560562 A CN 108560562A CN 201810506930 A CN201810506930 A CN 201810506930A CN 108560562 A CN108560562 A CN 108560562A
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- 210000001015 abdomen Anatomy 0.000 title abstract description 6
- 241000251468 Actinopterygii Species 0.000 title abstract description 5
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims abstract description 10
- 238000004873 anchoring Methods 0.000 claims description 24
- 230000000694 effects Effects 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
- E04C2003/0417—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts demountable
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0486—Truss like structures composed of separate truss elements
- E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a kind of stay length adjustable deep foundation pit support prestressing force fish belly sill, which includes a waist rail (1), at least a strut (2) and an at least drag-line (3)；The upper end of the strut (2) is fixed on by high-strength bolt on the waist rail (1), the lower end connection cable support node (9) of strut (2), drag-line (3) is passed through out of cable support node (9) drag-line channel, and drag-line (3) both ends are anchored in the anchor-hold device (5).Fish belly sill both ends and the purlin adjoined are spliced, and there is the bearing of symmetrical or angle brace in end.Prestressed application and strut make fish belly sill bending stiffness big the supporting role of waist rail, can reduce to support quantity to increase working space in hole.Stay length can carry out telescopic adjustment according to monitoring data in the present invention, can preferably control the deformation of foundation pit supporting construction；The installation of spare rope increases the rigidity and safety stock of fish belly sill.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a prestressed fish-belly sill for supporting a deep foundation pit, wherein the length of a stay bar is adjustable.
Background
For general foundation pit engineering, reasonable foundation pit supporting structure design and construction are required to be carried out by combining the conditions of geological conditions, surrounding environment and the like. The supporting structure is used as the most common supporting structure with the widest application range in deep foundation pit engineering and comprises an anchoring type structure, a supporting type structure, a cantilever type structure, double-row piles, a reverse construction method and the like. The anchor-pulling type and double-row piles occupy the underground space around a large number of foundation pits, the double-row piles are high in manufacturing cost, and deep foundation pit projects are generally located in building (structure) dense areas in cities, so that the two support structures are used less. The cantilever type has smaller rigidity and poorer deformation control capability, and is not suitable for being used in a deep foundation pit with larger depth. The inner support and the floor slab of the support type and reverse construction method can reduce the construction space inside the foundation pit, so that earth excavation and material equipment are difficult to enter and exit.
In order to obtain a larger construction space inside the foundation pit, the bending rigidity of the enclosing purlin needs to be increased, so that the distance between the diagonal braces is increased. Although the concrete support in the prior art has higher rigidity, the construction period of the concrete is longer, the concrete support is troublesome to disassemble, and the concrete support cannot be reused.
Disclosure of Invention
The technical problem is as follows: the prestressed fish-belly sill for supporting the deep foundation pit, provided by the invention, has high bending rigidity and can increase the diagonal (corner) support distance and the length of the support rod can be adjusted. The technical problem to be solved is to overcome the defects that the deep foundation pit supporting structure in the prior art is difficult to simultaneously meet the requirements of strong deformation control capability of the supporting structure, large construction operation space in a pit, small occupation of underground space around the pit and the like.
The technical scheme is as follows: the invention relates to a prestressed fish-web beam with adjustable length of a stay bar for supporting a deep foundation pit, which comprises a waist beam, at least one stay bar and at least one stay cable; the waist beam is formed by splicing a plurality of waist beam standard sections and two end stay cable anchoring devices; the stay bar is formed by splicing a plurality of standard stay bar sections, inclined struts and cable stay nodes connected with the stay cables;
the upper end of the stay bar is fixed on the wale through a high-strength bolt, the lower end of the stay bar is connected with a cable support node, a cable passes through a cable channel of the cable support node, and two ends of the cable are anchored in the cable anchoring device.
Wherein,
and a length adjusting device is also arranged between the standard section of the stay bar and the cable stay node.
The two symmetrical inclined struts are respectively positioned at two sides of the strut standard section, the upper part of each inclined strut is connected with the waist rail, and the lower part of each inclined strut is fixed on the strut standard section.
The inhaul cable consists of a plurality of inhaul cables for applying initial prestress and a plurality of standby inhaul cables.
The design principle of the stay cable line type is that the bending moment effect of the stay rod on the wale is close to the bending moment effect of the soil pressure on the wale as much as possible.
The waist rail standard section, the stay cable anchoring device, the stay rod standard section, the inclined strut, the length adjusting device and the cable strut node are standard parts which can be prefabricated in a factory, assembled on site and recycled after construction is finished.
The friction constraint of the stay cable on the cable stay node is very small, and the cable force of the stay cable is basically equal along the whole length.
The fish-bellied beam is fixed with the adjacent surrounding purlin and the opposite brace or the angle brace through a connecting device reserved on the inhaul cable anchoring device.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the technical scheme can effectively reduce the friction loss of the prestress of the stay cable in the tensioning stage, so that the tension stress of each section of the stay cable is equal. The friction loss of the prestress of the inhaul cable is small, so that the actual stress condition and the deformation control condition of the structure are more consistent with the design result. The cable stress is equal, so that the tensile capacity of the cable can be fully utilized, and the tension control stress is prevented from being limited by the stress value of a certain section of cable.
(2) The length of the stay bar in the technical scheme can be adjusted in a telescopic mode. The length adjustability of the stay bars can realize the active control of the deformation of the foundation pit by the fish-bellied beam support. The earth pressure may be inconsistent with the design value due to geotechnical engineering investigation errors, around-pit loading, precipitation and the like, and the supporting force of each supporting rod to the waist rail may also be inconsistent with the expected value due to manufacturing, assembling or construction errors. When the situation that the deformation or the deformation development rate and the like of the local part of the fish-belly sill into the pit are different from the expected value or exceed the alarm value is monitored, the tension of the stay cable and the distribution situation of the stay cable on each stay rod can be changed by changing the length of each stay rod, and the deformation of the waist sill into the pit is reduced by changing the tension of the stay cable and the distribution situation of the stay cable so that the tension of the stay cable and the bending moment effect of the soil pressure on the waist sill are equal to each other as much as possible.
(3) The spare guy cable in the technical scheme can increase the rigidity and the safe reserve of the fish-belly sill support. The larger the section area of the guy cable is, the larger the increase value of the guy cable tension after the waist beam is deformed is, namely, the larger the rigidity of the fish-belly sill is. When a part of the prestressed inhaul cable is broken, the existence of the standby inhaul cable can reduce the adverse effect caused by broken load and reduce the excessive increase of the stress value of other prestressed inhaul cables. When the situation that deformation or deformation development rate and the like of the whole fish-belly sill in a pit are different from an expected value or exceed an alarm value is monitored, the tension value of the stay cable can be increased by tensioning the standby stay cable, so that the stay cable is close to the bending moment effect of soil pressure on the waist sill as much as possible, and the deformation of a foundation pit is reduced.
(4) The fish-belly sill in the technical scheme can realize factory prefabrication field assembly, can be recycled, and is an economic, efficient, green and environment-friendly supporting system.
Drawings
FIG. 1 is a schematic view of a supporting type foundation pit supporting structure in the prior art;
FIG. 2 is a schematic view of a prestressed fish-bellied beam foundation pit supporting structure in the prior art;
FIG. 3 is a schematic view of a prestressed fish-belly sill for supporting a deep foundation pit with an adjustable stay bar length according to the present invention;
FIG. 4 is a schematic view of a length adjustment mechanism in a strut according to the present invention;
FIG. 5 is a schematic view of a cable stay joint at the end of a stay rod according to the present invention;
FIG. 6 is a schematic view of a cable anchoring device at the end of a wale according to the present invention.
The figure shows that: the support comprises a wale 1, at least one stay bar 2, a stay cable 3, a wale standard section 4, a stay cable anchoring device 5, a stay bar standard section 6, an inclined strut 7, a length adjusting device 8 and a cable support node 9.
Detailed Description
The prestressed fish-belly sill for supporting the deep foundation pit with the length-adjustable stay bar comprises a waist beam, at least one stay bar and at least one stay cable. The waist beam is formed by splicing a plurality of middle standard sections and 2 end stay cable anchoring devices. The stay bar consists of a plurality of middle standard sections, a length adjusting device, a cable stay node connected with the stay cable and an inclined strut. The inhaul cable consists of a plurality of prestressed inhaul cables for applying initial prestress and a plurality of standby inhaul cables.
The support rods are fixed on the waist rail through high-strength bolts and are perpendicular to the waist rail, and the support rods are symmetrically arranged on the waist rail in a left-right mode. The guy cable passes through the guy cable channel of each cable support node, and two ends of the guy cable are anchored in the guy cable anchoring device. The stay bar supports the stay through a stay channel of the cable support node and changes the angle between the stay and the wale, and the stay can freely slide in the stay channel without being restrained by larger friction. The fish-bellied beam is fixed with the adjacent surrounding purlin and the diagonal brace through a connecting device reserved on the inhaul cable anchoring device.
The design principle of the fixed position of the stay bar on the wale and the linear type of the stay cable is that the bending moment effects of the stay bar and the pressure of side soil on the wale are the same as much as possible so as to reduce the deformation of the fish-bellied beam into the pit. In a preferable scheme of the invention, the fixing positions of the stay bars on the wale are n +1 equal division points between anchoring points of the stay cables in the stay cable anchoring device, wherein n is the number of the stay bars; and each turning point and the end point of the guy cable are positioned on the same parabola, and the shape of the parabola is determined according to the span and the vertical span ratio of the fish-belly sill.
The length adjusting device in the stay bar is connected in series between the middle standard section of the stay bar and a cable stay node connected with a stay cable, and two ends of the length adjusting device are fixed by bolts. The length of the length adjusting device in the direction of the stay bar can be adjusted in a telescopic mode according to needs, and the length of the whole stay bar is changed by adjusting the length of the length adjusting device. The length adjusting device can be realized by a screw jack or a positive and negative screw thread sleeve head; in a preferred embodiment of the present invention, the length adjusting device is implemented by using a positive and negative thread socket head. The pull force of the stay cable and the relative size of the support force of the stay cable on each waist beam can be changed by adjusting the length of each stay rod, so that the problem that the displacement of the fish-belly beam is inconsistent with an expected value due to factors such as change of lateral soil pressure is solved, and the deformation of the fish-belly beam into the pit is always kept within an allowable value.
The inhaul cables comprise a plurality of inhaul cables needing to be applied with initial prestress and a plurality of spare cables. When the spare cable is used normally, active tensioning is not needed, and the spare cable only needs to be tensioned and anchored in the cable anchoring device together with the prestressed cable. The spare cable can increase the safety reserve of the fish-belly sill, and reduce the adverse effect of the cable breakage phenomenon on the whole supporting system when the prestressed cable is broken due to initial defects and the like; the spare stay cable can also improve the rigidity of the fish-belly sill and reduce the deformation of the whole supporting structure into the pit; the standby stay cable is also beneficial to formulating an emergency plan, and when the situation that the supporting structure deforms towards the pit or the deformation development rate is large is monitored, the standby stay cable can be tensioned to control deformation. In a preferable scheme of the invention, the spare cable accounts for 10% of the total amount of the inhaul cable.
All main components in the fish-belly sill are made of steel, wherein the standard sections, the stay cable anchoring devices, the length adjusting devices, the cable support nodes, the stay cables and the like are standard parts. The standard parts are prefabricated in the factory and are respectively reserved with devices for connecting with other components. The fish-belly sill can be prefabricated in a factory, assembled on site and recycled after the engineering is finished, and is an economic, efficient, green and environment-friendly support system.
Specifically, as shown in fig. 3, the prestressed fish-belly sill for supporting a deep foundation pit with adjustable length of the stay bar comprises a waist sill 1, a plurality of stay bars 2 and a stay cable 3. The wale 1 is formed by splicing a plurality of standard sections 4 of the wale and two end stay cable anchoring devices 5 by high-strength bolts. The stay bar is formed by splicing a plurality of standard stay bar sections 6, inclined struts 7, length adjusting devices 8 and cable stay nodes 9 connected with the stay cables in sequence by high-strength bolts. The inhaul cable 3 consists of a plurality of prestressed inhaul cables for applying initial prestress and a plurality of standby inhaul cables.
The stay bar 2 is fixed on the wale 1 through a high-strength bolt, the stay cable 3 passes through the stay cable channel of each cable support node 9, and two ends of the stay cable 3 are anchored in the stay cable anchoring device 5. The stay bar 2 supports the stay cable 3 through a cable channel of the cable support node 9 and changes the angle between the stay cable 3 and the wale 1, and the stay cable 3 can slide in the cable channel without being restrained by too much friction. The fish-belly sill is fixed with the adjacent surrounding purlin and the opposite (corner) support through a connecting device reserved on the inhaul cable anchoring device 5.
The connection points of the stay cable 3, the stay rods 2 and the stay cable anchoring devices 5 are positioned on the same parabola, and the rise is 3.85 m. The fixing positions of the standard stay section 6 of the stay bar 2 on the wale 1 are 5 equal points 6 between the anchoring points of the stay cable 3 in the stay cable anchoring device 5, and the included angle between the inclined stay 7 and the wale 1 is 60 degrees. The fish-belly sill is symmetrical left and right about the middle section, the total span of the waist sill is 24m, and the distance between the support rods is 4 m; the length of the stay bar at one side is 2.14m, 3.42m and 3.85m in sequence; the cables comprising 18 cables to be prestressedThe strands and 4 spareSteel strand wires; the middle standard section of the wale adopts HW400 multiplied by 13 multiplied by 21 section steel, and the middle standard section of the brace rod and the diagonal brace adopt HW300 multiplied by 10 multiplied by 15 section steel.
The length adjusting device 8 is connected in series between the standard section 6 of the stay bar and the cable stay node 9, two ends of the length adjusting device are fixed by high-strength bolts, the length of the whole stay bar 2 is changed by adjusting the length of the length adjusting device, and the length adjusting device is realized by adopting a positive and negative thread sleeve head. The pull force of the stay cable 3 and the relative size of the supporting force of the stay cable on the waist rail 1 can be changed by adjusting the length of each stay bar 2, so that the problem that the displacement of the fish-belly sill caused by factors such as change of lateral soil pressure is inconsistent with an expected value is solved, and the deformation of the fish-belly sill into the pit is always kept within an allowable value.
The above examples are only preferred embodiments of the present invention, it should be noted that: it will be apparent to those skilled in the art that various modifications and equivalents can be made without departing from the spirit of the invention, and it is intended that all such modifications and equivalents fall within the scope of the invention as defined in the claims.
Claims (7)
1. A prestressed fish-web beam with an adjustable stay bar length for supporting a deep foundation pit is characterized by comprising a waist beam (1), at least one stay bar (2) and at least one stay cable (3); the wale (1) is formed by splicing a plurality of standard wale sections (4) and two end stay cable anchoring devices (5); the stay bar (2) is formed by splicing a plurality of standard stay bar sections (6), inclined struts (7) and cable strut nodes (9) connected with the stay cables;
the upper end of the stay bar (2) is fixed on the wale (1) through a high-strength bolt, the lower end of the stay bar (2) is connected with a cable support node (9), a cable (3) passes through a cable channel of the cable support node (9), two ends of the cable (3) are anchored in the cable anchoring device (5),
and a length adjusting device (8) is also arranged between the strut standard section (6) and the cable bracing node (9).
2. The prestressed fish-bellied beam for supporting a deep foundation pit with an adjustable stay bar length according to claim 1, wherein the number of the diagonal braces (7) is two, and the two diagonal braces are respectively positioned at two sides of the standard stay bar section (6), the upper part of the diagonal brace is connected with the wale (1), and the lower part of the diagonal brace is fixed on the standard stay bar section (6).
3. The prestressed fish-belly sill for deep foundation pit support with adjustable stay bar length according to claim 1, characterized in that the stay cable (3) is composed of a plurality of stay cables applying initial prestress and a plurality of spare stay cables.
4. The prestressed fish-bellied beam for deep foundation pit support with adjustable stay bar length according to claim 1, characterized in that the design principle of the bracing cable (3) line type is that the bending moment effect of the stay bar (2) on the wale (1) is as close as possible to the bending moment effect of the earth pressure on the wale (1).
5. The prestressed fish-belly sill for supporting a deep foundation pit with an adjustable stay bar length according to claim 1, characterized in that the waist rail standard section (4), the stay cable anchoring device (5), the stay bar standard section (6), the diagonal brace (7), the length adjusting device (8) and the cable support node (9) are all standard parts which are prefabricated in a factory, assembled on site and recycled after construction.
6. The prestressed fish-belly sill for deep foundation pit support with adjustable stay bar length according to claim 1, characterized in that the stay cable (3) is subjected to very little frictional restraint on the cable stay node (9), and the cable force of the stay cable (3) is substantially equal along the whole length.
7. The prestressed fish-web beam for supporting deep foundation pit with adjustable stay bar length according to claim 1, wherein the fish-web beam is fixed with the adjacent surrounding purlin and the opposite brace or angle brace through the connecting device reserved on the guy cable anchoring device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810506930.2A CN108560562A (en) | 2018-05-24 | 2018-05-24 | A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810506930.2A CN108560562A (en) | 2018-05-24 | 2018-05-24 | A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill |
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| CN108560562A true CN108560562A (en) | 2018-09-21 |
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| CN201810506930.2A Pending CN108560562A (en) | 2018-05-24 | 2018-05-24 | A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111074942A (en) * | 2019-12-31 | 2020-04-28 | 中车建设工程有限公司 | Large-span rectangular underground station and construction method thereof |
| CN111074941A (en) * | 2019-12-31 | 2020-04-28 | 中车建设工程有限公司 | Large-span composite structural underground station and construction method thereof |
| CN116752589A (en) * | 2023-08-22 | 2023-09-15 | 北京中建建筑科学研究院有限公司 | Prestressed fish belly type reaction frame, pile foundation bearing capacity detection device and application |
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| CN111074941A (en) * | 2019-12-31 | 2020-04-28 | 中车建设工程有限公司 | Large-span composite structural underground station and construction method thereof |
| CN111074942B (en) * | 2019-12-31 | 2024-11-08 | 中车智能交通工程技术有限公司 | Large-span rectangular underground station and construction method thereof |
| CN111074941B (en) * | 2019-12-31 | 2024-11-08 | 中车智能交通工程技术有限公司 | Large-span composite structure type underground station and construction method thereof |
| CN116752589A (en) * | 2023-08-22 | 2023-09-15 | 北京中建建筑科学研究院有限公司 | Prestressed fish belly type reaction frame, pile foundation bearing capacity detection device and application |
| CN116752589B (en) * | 2023-08-22 | 2023-11-17 | 北京中建建筑科学研究院有限公司 | Prestressed fish belly type reaction frame, pile foundation bearing capacity detection device and application |
| US12037762B1 (en) | 2023-08-22 | 2024-07-16 | Beijing Building Research Institute Corporation Limited Of Cscec | Prestressed fish-belly reaction frame, pile foundation bearing capacity detection device and application thereof |
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Application publication date: 20180921 |