CN102888847A - Construction method free from lowering water level for local deep foundation pit of elevator shaft - Google Patents
Construction method free from lowering water level for local deep foundation pit of elevator shaft Download PDFInfo
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- CN102888847A CN102888847A CN2012103987209A CN201210398720A CN102888847A CN 102888847 A CN102888847 A CN 102888847A CN 2012103987209 A CN2012103987209 A CN 2012103987209A CN 201210398720 A CN201210398720 A CN 201210398720A CN 102888847 A CN102888847 A CN 102888847A
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Abstract
The invention relates to a construction method for a local deep foundation pit of an elevator shaft, in particular to a construction method free from lowering water level for the local deep foundation pit of the elevator shaft. The method comprises the following steps: preparing a trapezoid box-type steel molding plate device with a bottom but without a cover by welding profile steel, angle iron and steel plates; performing water-proof treatment in the steel molding plate device, tying steel bars, and excavating the elevator foundation pit in the way of pumping water and excavating at the same time; after the elevator foundation pit is excavated, hoisting and installing the steel molding plate device at a measuring benchmark position by a crane; casting raft concrete to interior and exterior of the steel molding plate device to meet the requirements of underground water buoyance force and side pressing force; after the interior concrete reaches certain strength, cutting off the profile steel and the angle iron inside the steel molding plate device; and then performing the next step construction procedure of main building raft. The construction method is simple in operation, the steel molding plate device is good in anti-buoyance force effect, the water-proof and steel bar constructions are convenient; and after a foundation trench is excavated, when the underground water level is close to the elevation of the trench bottom, the local deep foundation pit of the elevator shaft is possible to be free from lowering the water level.
Description
Technical field
The present invention relates to the local construction method of deep foundation ditch of elevator shaft, specifically the local deep foundation ditch of a kind of elevator shaft is exempted from dewatering construction method.
Background technology
Behind the excavating foundation trench, groundwater table and bottom land absolute altitude near the time, the local deep foundation ditch of elevator shaft is general to adopt following job practices:
1, well-points dewatering construction.Well-points dewatering is a kind of method of artificial dewatering.Before excavation of foundation pit, around foundation ditch, bury the filter pipe (well) of some underground, to utilize pumping equipment to draw water and make the soil that digs remain the method for dry state, the lasting cycle of this job practices is long, and cost is high, and incurs loss through delay the duration.
2, open caisson construction.Open caisson is the concrete pit shaft of a bottomless uncovered, generally partly is comprised of sword pin, the borehole wall, partition wall etc.In open caisson, cut the earth and make its sinking, reach design elevation after, carry out the concrete back cover, fill out the heart, build top cover, consist of open caisson foundation.This job practices pit shaft is longer from being fabricated into life cycle, and difficulty is large in basil construction, the open caisson deadweight is larger, and sword foot section area is little, center of gravity is higher, easily cause causing open caisson cracking or toppling over because of land subsidence, in the well sinking process as run into large gravel, trunk or shaft bottom rock layer surface and tilt when excessive, also will bring larger difficulty to construction.The most important thing is that the bottom is a difficult point without mouth waterproof when having built concrete, it can not guarantee and satisfy waterproof and reach designing requirement.
Vertical the above, the problem that the local construction method of deep foundation ditch of existing elevator shaft exists is: construct loaded down with trivial details, speed of application is slow, the cycle is long, cost is high.
Summary of the invention
The present invention is intended to solve the problems referred to above that the local construction method of deep foundation ditch of existing elevator shaft exists, and provides a kind of behind excavating foundation trench, groundwater table and bottom land absolute altitude near the time, elevator shaft part deep foundation ditch can adopt the job practices of exempting from precipitation.
The technical solution used in the present invention is:
The local deep foundation ditch of a kind of elevator shaft is exempted from dewatering construction method, carries out as follows:
A. made without being stamped the trapezoidal box steel form device at the end by shaped steel, angle steel, Plate Welding;
B. do waterproofing work in described steel form device, the good reinforcing bar of colligation adopts the mode of the excavation while drawing water to excavate the elevator foundation ditch simultaneously;
C. after the elevator foundation ditch scrapes out, with crane described steel form device lifting is mounted to the measuring basis position;
D. inside and outside described steel form device, build simultaneously the raft board concrete to satisfy buoyancy force of underground water and lateral pressure requirement, when treating that inner concrete reaches some strength, again the inner shaped steel of steel form device and angle steel are cut away, carry out afterwards next step main building raft plate working procedure.
Steps d can also be: in described steel form device injected water, outside described steel form device concreting, to satisfy buoyancy force of underground water and lateral pressure requirement, when treating that outside concrete reaches some strength, water in the steel form device is drained, then build the raft board concrete, when treating that inner concrete reaches some strength, the more inner shaped steel of steel form device and angle steel are cut away, carry out afterwards next step main building raft plate working procedure.
Compared with prior art, the outstanding feature of technique scheme of the present invention is: constructing operation is easy, and steel form device anti-floating power is effective, be convenient to the construction of waterproof and reinforcing bar, after making excavating foundation trench, groundwater table and bottom land absolute altitude near the time, the local deep foundation ditch of elevator shaft is exempted from precipitation becomes possibility.
Description of drawings:
Fig. 1 is trapezoidal box steel form device plane structure schematic diagram of the present invention.
Fig. 2 is A-A cross-sectional view among Fig. 1.
Fig. 3 is B-B cross-sectional view among Fig. 1.
Fig. 4 is the peripheral reinforcing bar anchor fluke of trapezoidal box steel form device of the present invention arrangement diagram.
Fig. 5 is C-C cross-sectional view among Fig. 4.
Among the figure: 1-casing, 2-angle steel support member, 3-angle steel, 4-i iron, 5-steel plate, 6-reinforcing bar anchor fluke.
The specific embodiment
The invention will be further described below in conjunction with embodiment, and purpose only is to understand better content of the present invention.Therefore, the cited case does not limit protection scope of the present invention.
Referring to accompanying drawing, the local deep foundation ditch of the elevator shaft that the present embodiment provides is exempted from dewatering construction method and is:
At first, adopt angle steel support member 2, angle steel 3, i iron 4, steel plate 5 welding productions without the steel form device that is stamped the end, this steel form device one side box body 1 is oblique (see figure 2) and consists of trapezoidal case structure, welded reinforcement anchor fluke 6(sees Fig. 4, Fig. 5 on the casing 1 peripheral angle steel 3), angle steel 3 is the L63 angle steel, reinforcing bar anchor fluke 6 is 25 screw-thread steels, and reinforcing bar anchor fluke 6 spacings are 500MM, and length also is 500MM.
After making, does in the steel form device the good reinforcing bar of waterproofing work and colligation within it.
Secondly, after the elevator foundation ditch adopts the method for the excavation while drawing water to scrape out, arrange crane hanging component steel form device to the measuring basis position, then build simultaneously the raft board concrete to satisfy buoyancy force of underground water and lateral pressure requirement outward within it, when treating that inner concrete reaches some strength, establishment officer cuts away its inner shaped steel and angle steel, just can normally carry out next step main building raft plate working procedure afterwards.
Perhaps, lift to the measuring basis position at the steel form device, in the steel form device outside injected water, the steel form device concreting to satisfy buoyancy force of underground water and lateral pressure requirement, when treating that outside concrete reaches some strength, water in the steel form device is drained, and then concreting, when treating that inner concrete reaches some strength, establishment officer cuts away the inner shaped steel of steel form device and angle steel, carries out afterwards the construction of main building raft plate.
Claims (2)
1. the local deep foundation ditch of elevator shaft is exempted from dewatering construction method, it is characterized in that, it carries out as follows:
A. made without being stamped the trapezoidal box steel form device at the end by shaped steel, angle steel, Plate Welding;
B. do waterproofing work in described steel form device, the good reinforcing bar of colligation adopts the mode of the excavation while drawing water to excavate the elevator foundation ditch simultaneously;
C. after the elevator foundation ditch scrapes out, with crane described steel form device lifting is mounted to the measuring basis position;
D. inside and outside described steel form device, build simultaneously the raft board concrete, to satisfy buoyancy force of underground water and lateral pressure requirement, when treating that inner concrete reaches some strength, the more inner shaped steel of steel form device and angle steel are cut away, carry out afterwards next step main building raft plate working procedure.
2. the local deep foundation ditch of elevator shaft according to claim 1 is exempted from dewatering construction method, it is characterized in that, steps d can also be: in described steel form device injected water, outside described steel form device concreting, to satisfy buoyancy force of underground water and lateral pressure requirement, when treating that outside concrete reaches some strength, water in the steel form device is drained, then build the raft board concrete, when treating that inner concrete reaches some strength, again the inner shaped steel of steel form device and angle steel are cut away, carry out afterwards next step main building raft plate working procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398720.9A CN102888847B (en) | 2012-10-19 | 2012-10-19 | Construction method free from lowering water level for local deep foundation pit of elevator shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398720.9A CN102888847B (en) | 2012-10-19 | 2012-10-19 | Construction method free from lowering water level for local deep foundation pit of elevator shaft |
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| CN102888847A true CN102888847A (en) | 2013-01-23 |
| CN102888847B CN102888847B (en) | 2014-12-24 |
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| CN201210398720.9A Active CN102888847B (en) | 2012-10-19 | 2012-10-19 | Construction method free from lowering water level for local deep foundation pit of elevator shaft |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774698A (en) * | 2014-02-14 | 2014-05-07 | 中国十九冶集团有限公司 | Drainage-free construction method for soil engineering |
| CN104975607A (en) * | 2015-07-22 | 2015-10-14 | 中建八局第二建设有限公司 | Offshore area local deep foundation pit stanching pit construction method |
| CN105133619A (en) * | 2015-08-07 | 2015-12-09 | 中国一冶集团有限公司 | Construction method for deep foundation pit of elevator shaft |
| CN106498951A (en) * | 2016-11-30 | 2017-03-15 | 上海市机械施工集团有限公司 | A kind of shaft excavation construction method |
| CN107938681A (en) * | 2017-11-26 | 2018-04-20 | 上海宝冶集团有限公司 | Way after concrete sump |
| CN112464353A (en) * | 2020-12-18 | 2021-03-09 | 中国二十冶集团有限公司 | BIM-based modeling method and system for special-shaped wall |
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| CN101481910A (en) * | 2009-01-09 | 2009-07-15 | 江苏省华建建设股份有限公司 | Construction method of foundation pit slope supported independent pile tower crane foundation |
| CN101538868A (en) * | 2009-02-06 | 2009-09-23 | 青海省电力设计院 | Everfrost and saline soil region transmission line pole glass fiber reinforced plastic foundation construction method |
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| JPH03199531A (en) * | 1989-12-27 | 1991-08-30 | Hazama Gumi Ltd | Construction of underground body and mold frame thereof |
| CN101457528A (en) * | 2007-12-14 | 2009-06-17 | 卢锡雷 | Seamless joint pipe caisson pouring row pile construction technique |
| CN101481910A (en) * | 2009-01-09 | 2009-07-15 | 江苏省华建建设股份有限公司 | Construction method of foundation pit slope supported independent pile tower crane foundation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774698A (en) * | 2014-02-14 | 2014-05-07 | 中国十九冶集团有限公司 | Drainage-free construction method for soil engineering |
| CN103774698B (en) * | 2014-02-14 | 2015-05-06 | 中国十九冶集团有限公司 | Drainage-free construction method for soil engineering |
| CN104975607A (en) * | 2015-07-22 | 2015-10-14 | 中建八局第二建设有限公司 | Offshore area local deep foundation pit stanching pit construction method |
| CN105133619A (en) * | 2015-08-07 | 2015-12-09 | 中国一冶集团有限公司 | Construction method for deep foundation pit of elevator shaft |
| CN105133619B (en) * | 2015-08-07 | 2017-07-21 | 中国一冶集团有限公司 | Elevator construction method of deep foundation ditch |
| CN106498951A (en) * | 2016-11-30 | 2017-03-15 | 上海市机械施工集团有限公司 | A kind of shaft excavation construction method |
| CN107938681A (en) * | 2017-11-26 | 2018-04-20 | 上海宝冶集团有限公司 | Way after concrete sump |
| CN112464353A (en) * | 2020-12-18 | 2021-03-09 | 中国二十冶集团有限公司 | BIM-based modeling method and system for special-shaped wall |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102888847B (en) | 2014-12-24 |
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