CN107476316B - Building foundation pit internal and external support structure and construction method - Google Patents
Building foundation pit internal and external support structure and construction method Download PDFInfo
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- CN107476316B CN107476316B CN201710848861.9A CN201710848861A CN107476316B CN 107476316 B CN107476316 B CN 107476316B CN 201710848861 A CN201710848861 A CN 201710848861A CN 107476316 B CN107476316 B CN 107476316B
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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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides an internal and external support structure of a building foundation pit and a construction method, wherein the internal and external support structure comprises an anchor rod/cable, a spherical steering support, an upper pressure rod, a lower pressure rod, a support pile, an internal support structure and an internal and external support connecting rod, wherein the anchor rod/cable is a large-inclination-angle rock soil anchor rod/cable with the angle of 30-60 degrees, one end of the anchor rod/cable 1 is anchored in a stable rock-soil body, and the other end of the anchor rod/cable extends into the foundation pit and is connected with the spherical steering support. The supporting pile is provided with a crown beam and a waist beam, one end of the upper pressure rod is connected with the spherical steering, and the other end of the upper pressure rod is connected with the crown beam. One end of the lower pressure rod is connected with the spherical steering support, the other end of the lower pressure rod is connected with the waist beam, and the inner and outer support connecting rods are connected with the inner support structure. The invention discloses an internal and external support structure of a building foundation pit and a construction method thereof.A large-inclination-angle anchor rod/cable structure is adopted, so that the horizontal length of an anchor rod/cable and the disturbance range of the anchor rod/cable on a soil layer are reduced, the damage of the anchor rod/cable on peripheral buildings and roads is avoided, and the environment is protected.
Description
Technical Field
The invention belongs to the technical field of supporting structures of building foundation pits, and particularly relates to an internal and external supporting structure of a building foundation pit and a construction method.
Background
In the support of a building foundation pit, the support is generally divided into an anchor rod (cable), an anchor-pull type support structure and a support structure which is arranged in the foundation pit and is composed of reinforced concrete or steel components.
The anchor rods (cables) are usually connected at one end to a supporting structural member and anchored at the other end in a stable ground mass. The tension member is often limited in use because the anchor rod extends far into the rock-soil mass and affects and damages houses, roads and various municipal pipelines in the affected area to different degrees.
The inner support is a supporting structure mainly comprising a soil retaining member and the inner support. As the foundation pit is deeply and greatly developed, the inner support structure is complex in type, the support members and the connection requirements thereof are high, the manufacturing cost is high, the construction period is long, and the construction is complex. A number of difficulties are posed to the design and construction of the inner support.
Disclosure of Invention
The invention aims to solve the technical problems and provides an internal and external supporting structure of a building foundation pit and a construction method thereof, wherein the internal and external supporting structure has a large inclination angle and a short horizontal influence plane, does not influence the safety of peripheral buildings, roads and municipal facilities, and is combined with an internal supporting project to reduce the center distance of adjacent supporting points of the internal support so as to achieve the aims of reducing the material consumption, lowering the construction cost and shortening the construction period.
In order to solve the technical problem, the invention is realized by the following technical scheme: an internal and external support structure of a building foundation pit comprises anchor rods/cables 1, spherical steering supports 2, an upper pressure rod 3, a lower pressure rod 4, a support pile 5, an internal support structure 6 and an internal and external support connecting rod 7, wherein the anchor rods/cables 1 are large-inclination rock soil anchor rods/cables with the inclination angle of 30-60 degrees, one end of each anchor rod/cable 1 is anchored in a stable rock-soil body, and the other end of each anchor rod/cable extends into the foundation pit and is connected with the spherical steering supports 2; a crown beam 8 and a waist beam 9 are arranged on the supporting pile 5, one end of the upper pressure rod 3 is connected with the spherical steering support 2, and the other end of the upper pressure rod is connected with the crown beam 8 of the supporting pile 5; one end of the lower pressure rod 4 is connected with the spherical steering support 2, the other end of the lower pressure rod is connected with a waist rail 9 of the support pile 5, the inner and outer support connecting rod 7 is connected with the inner support structure 6, and the anchor rod/cable 1, the upper pressure rod 3, the lower pressure rod 4, the support pile 5 and the inner support structure 6 are connected with the inner and outer support connecting rod 7 into a whole through the spherical steering support 2 to form the inner and outer support structure of the foundation pit.
Preferably, the adjacent spherical steering supports 2 are connected through the anchor rods/cables 1 and the inner and outer support connecting rods 7.
A construction method for an internal and external support structure of a building foundation pit comprises the following steps:
the method comprises the following steps: leveling the field and paying off and arranging points: positioning and setting out according to design requirements, and determining the positions of the support piles 5 and the anchor rods/cables 1 and the side line of the foundation pit;
step two: calculating and determining an inclination angle alpha of the anchor rod/cable 1 according to the geological survey report data, and performing pore-forming construction according to the construction sequence of the anchor rod/cable 1;
step three: manufacturing and installing a rod body: manufacturing an anchor rod/cable 1 rod body according to design requirements, and timely inserting the rod body and grouting after hole forming;
step four: calculating and determining the lengths of an upper pressure rod 3 and a lower pressure rod 4 according to the inclination angle of an anchor rod/cable 1 and the requirement of an inner support, and manufacturing a spherical steering support 2, the upper pressure rod 3 and the lower pressure rod 4;
step five: and excavating the upper foundation pit and ensuring the construction and installation position of the spherical steering support 2 according to the position of the spherical steering support 2 in the foundation pit.
Step six: the spherical steering support 2 and the crown beam 8 and the waist beam 9 of the support pile 5 are welded and fixed by an upper pressure rod 3 and a lower pressure rod 4 in sequence;
step seven: locking the anchor rod/cable 1 on the spherical steering support 2;
step eight: each spherical steering support 2 is firmly welded by an inner and outer support connecting rod 7;
step nine: completing the welding construction of the inner support structure 6 member according to the inner support design;
step ten: and finishing the construction of the inner and outer combined support of the building foundation pit.
Compared with the prior art, the invention has the following beneficial effects:
according to the internal and external support structure of the building foundation pit and the construction method, the anchor rod/cable structure with the large inclination angle is adopted, so that the horizontal length of the anchor rod/cable and the disturbance range of the anchor rod/cable on the soil layer are reduced, the damage of the anchor rod/cable on peripheral buildings, roads and municipal facilities is avoided, the environment is protected, and good social benefits are achieved.
According to the building foundation pit internal and external support structure and the construction method, the spherical steering support in the pit, the upper pressure rod, the lower pressure rod and the support pile are connected, so that the supporting and soil retaining effects on the support pile are achieved, the phenomenon that the large-inclination-angle anchor rod/cable is horizontally pulled and lowered is reduced or avoided, the vertical pressure of the large-inclination-angle anchor rod/cable on the support pile is reduced, and the device is effectively protected.
According to the internal and external support structure of the building foundation pit and the construction method, the anchor rods/cables are directly embedded into the rock mass, so that the pulling resistance bearing capacity of the anchor rods/cables can be greatly improved, and the adverse effects of soil layer anchor rods and weathered argillaceous rock layer creep variables can be avoided. Because of the improvement of the pulling-resistant bearing capacity, the use amount of the anchor rod can be reduced, raw materials are saved, and the construction cost is reduced.
According to the internal and external support structure for the building foundation pit and the construction method, the anchor pull type retaining structure and the support type retaining structure are combined to form a combined support structure system, and the internal and external support structure is suitable for deeper and larger foundation pit engineering. Not only increased the elastic support of retaining structure, improved stock axial tension and interior support axial pressure value, still effectively guaranteed foundation ditch engineering quality and the security of foundation ditch use.
Drawings
Fig. 1 is a schematic view of an internal and external support structure of a building foundation pit.
Fig. 2 is a plan view of fig. 1.
Reference numerals: 1. anchor/cable; 2. a spherical steering support; 3. an upper pressure lever; 4. a lower pressure lever; 5. supporting piles; 6. an inner support structure; 7. an inner and outer support tie rod; 8. a crown beam; 9. a wale.
Detailed Description
The embodiments are described in detail below with reference to the accompanying drawings.
Referring to attached drawings 1 and 2, the internal and external support structure for the building foundation pit comprises an anchor rod/cable 1, a spherical steering support 2, an upper pressure rod 3, a lower pressure rod 4, a support pile 5, an internal support structure 6 and an internal and external support tie rod 7, wherein the anchor rod/cable 1 is a large-inclination-angle rock anchor rod/cable with the angle of 30-60 degrees, one end of the anchor rod/cable 1 is anchored in a stable rock-soil body, and the other end of the anchor rod/cable extends into the foundation pit and is connected with the spherical steering support 2; a crown beam 8 and a waist beam 9 are arranged on the supporting pile 5, one end of the upper pressure rod 3 is connected with the spherical steering support 2, and the other end of the upper pressure rod is connected with the crown beam 8 of the supporting pile 5; one end of the lower pressure rod 4 is connected with the spherical steering support 2, the other end of the lower pressure rod is connected with a waist beam 9 of the support pile 5, the inner and outer support connecting rod 7 is connected with the inner support structure 6, and the anchor rod/cable 1, the upper pressure rod 3, the lower pressure rod 4, the support pile 5 and the inner support structure 6 are connected with the inner and outer support connecting rod 7 into a whole through the spherical steering support 2 to form the inner and outer support structure of the foundation pit.
Preferably, the adjacent spherical steering supports 2 are connected through the anchor rods/cables 1 and the inner and outer support connecting rods 7.
Preferably, the construction method of the internal and external support structure of the building foundation pit comprises the following steps:
the method comprises the following steps: leveling the field and distributing the points by paying off: positioning and paying off according to design requirements, and determining the positions of the support piles 5 and the anchor rods/cables 1 and the side lines of the foundation pit;
step two: calculating and determining an inclination angle alpha of the anchor rod/cable 1 according to the geological survey report data, and performing pore-forming construction according to the construction sequence of the anchor rod/cable 1;
step three: manufacturing and installing a rod body: manufacturing an anchor rod/cable 1 rod body according to design requirements, and inserting the rod body and grouting in time after hole forming;
step four: calculating and determining the lengths of an upper pressure rod 3 and a lower pressure rod 4 according to the inclination angle of an anchor rod/cable 1 and the requirement of an inner support, and manufacturing a spherical steering support 2, the upper pressure rod 3 and the lower pressure rod 4;
step five: and excavating the upper foundation pit and ensuring the construction and installation position of the spherical steering support 2 according to the position of the spherical steering support 2 in the foundation pit.
Step six: the spherical steering support 2 and the crown beam 8 and the waist beam 9 of the support pile 5 are welded and fixed by an upper pressure rod 3 and a lower pressure rod 4 in sequence;
step seven: locking the anchor rod/cable 1 on the spherical steering support 2;
step eight: the spherical steering supports 2 are firmly welded by the inner and outer support connecting rods 7;
step nine: completing the welding construction of the inner support structure 6 component according to the inner support design;
step ten: and finishing the construction of the inner and outer combined support of the building foundation pit.
The above list is only one of the specific embodiments of the present invention. It will be clear that the invention is not limited to the above embodiments, but that many similar modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (3)
1. The utility model provides an inside and outside bearing structure of building foundation ditch which characterized in that: the anchor rod/cable (1) is a large-inclination rock soil anchor rod/cable with the inclination angle of 30-60 degrees, one end of the anchor rod/cable (1) is anchored in a stable rock body, and the other end of the anchor rod/cable (1) extends into a foundation pit and is connected with the spherical steering support (2); a crown beam (8) and a waist beam (9) are arranged on the supporting pile (5), one end of the upper pressure lever (3) is connected with the spherical steering support (2), and the other end of the upper pressure lever is connected with the crown beam (8) of the supporting pile (5); one end of the lower pressure rod (4) is connected with the spherical steering support (2), the other end of the lower pressure rod is connected with a waist beam (9) of the support pile (5), the inner and outer support tie rod (7) is connected with the inner support structure (6), and the anchor rod/cable (1), the upper pressure rod (3), the lower pressure rod (4), the support pile (5) and the inner support structure (6) are connected with the inner and outer support tie rod (7) into a whole through the spherical steering support (2) to form the inner and outer support structure of the foundation pit.
2. The support structure inside and outside a building foundation pit according to claim 1, wherein: the adjacent spherical steering supports (2) are connected through an anchor rod/cable (1) inner and outer support connecting rod (7).
3. The construction method of the inner and outer support structures of the building foundation pit according to claim 1 or 2, wherein: the method comprises the following steps:
the method comprises the following steps: leveling the field and paying off and arranging points: positioning and paying off according to design requirements, and determining the positions of the support piles (5) and the anchor rods/cables (1) and the side lines of the foundation pit;
step two: calculating and determining an inclination angle alpha of the anchor rod/cable (1) according to the geological survey report data, and performing hole forming construction according to the construction sequence of the anchor rod/cable (1);
step three: manufacturing and installing a rod body: manufacturing a rod body of the anchor rod/cable (1) according to design requirements, and timely inserting the rod body and grouting after hole forming;
step four: calculating and determining the lengths of an upper pressure rod (3) and a lower pressure rod (4) according to the inclination angle of the anchor rod/cable (1) and the requirement of an inner support, and manufacturing a spherical steering support (2), the upper pressure rod (3) and the lower pressure rod (4);
step five: and excavating the upper foundation pit and ensuring the construction and installation position of the spherical steering support (2) according to the position of the spherical steering support (2) in the foundation pit.
Step six: the spherical steering support (2) and the crown beam (8) and the waist beam (9) of the support pile (5) are welded and fixed by an upper pressure lever (3) and a lower pressure lever (4) in sequence;
step seven: locking the anchor rod/cable (1) on the spherical steering support (2);
step eight: the spherical steering supports (2) are firmly welded by using the inner and outer support connecting rods (7);
step nine: completing the welding construction of the members of the inner support structure (6) according to the inner support design;
step ten: and finishing the construction of the inner and outer combined support of the building foundation pit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710848861.9A CN107476316B (en) | 2017-09-20 | 2017-09-20 | Building foundation pit internal and external support structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710848861.9A CN107476316B (en) | 2017-09-20 | 2017-09-20 | Building foundation pit internal and external support structure and construction method |
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| CN107476316A CN107476316A (en) | 2017-12-15 |
| CN107476316B true CN107476316B (en) | 2022-12-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108166553B (en) * | 2018-01-22 | 2020-05-12 | 东莞市朝立建筑工程有限公司 | Rapid foundation pit excavation equipment and excavation method |
| CN109113070B (en) * | 2018-08-24 | 2020-04-28 | 洛阳理工学院 | Building foundation pit internal and external support structure and construction method |
| CN109972631B (en) * | 2019-04-08 | 2024-06-25 | 桂林理工大学 | Supporting structure for foundation pit by supporting in vertical face |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016079651A (en) * | 2014-10-16 | 2016-05-16 | 大成建設株式会社 | Support structure |
| KR20160144111A (en) * | 2015-06-08 | 2016-12-16 | 초석엔지니어링(주) | Foundation block for retaining wall and reinforcing method of base ground using it |
| CN106245657A (en) * | 2016-08-25 | 2016-12-21 | 安徽省城建设计研究总院有限公司 | A kind of purlin anchor supporting construction for pattern foundation pit supporting structure |
| CN207244634U (en) * | 2017-09-20 | 2018-04-17 | 中恒建设集团有限公司 | External supporting structure in a kind of building foundation pit |
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2017
- 2017-09-20 CN CN201710848861.9A patent/CN107476316B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016079651A (en) * | 2014-10-16 | 2016-05-16 | 大成建設株式会社 | Support structure |
| KR20160144111A (en) * | 2015-06-08 | 2016-12-16 | 초석엔지니어링(주) | Foundation block for retaining wall and reinforcing method of base ground using it |
| CN106245657A (en) * | 2016-08-25 | 2016-12-21 | 安徽省城建设计研究总院有限公司 | A kind of purlin anchor supporting construction for pattern foundation pit supporting structure |
| CN207244634U (en) * | 2017-09-20 | 2018-04-17 | 中恒建设集团有限公司 | External supporting structure in a kind of building foundation pit |
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Denomination of invention: A type of internal and external support structure and construction method for building foundation pits Effective date of registration: 20230413 Granted publication date: 20221213 Pledgee: Bank of Communications Ltd. Jiangxi branch Pledgor: ZHONGHENG CONSTRUCTION GROUP Co.,Ltd. Registration number: Y2023980038116 |
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