CN103031849A - Method for construction of arranging dewatering well in foundation pit and flexibly closing dewatering well - Google Patents
Method for construction of arranging dewatering well in foundation pit and flexibly closing dewatering well Download PDFInfo
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- CN103031849A CN103031849A CN2012105798697A CN201210579869A CN103031849A CN 103031849 A CN103031849 A CN 103031849A CN 2012105798697 A CN2012105798697 A CN 2012105798697A CN 201210579869 A CN201210579869 A CN 201210579869A CN 103031849 A CN103031849 A CN 103031849A
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- dewatering well
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- dewatering
- foundation
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000004793 Polystyrene Substances 0.000 claims description 7
- 229920002223 polystyrene Polymers 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000004078 waterproofing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 description 9
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 4
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of constructional engineering, and in particular relates to a method for construction of arranging a dewatering well in a foundation pit and flexibly closing the dewatering well. The following steps are adopted: 1, arranging the dewatering well in the foundation pit; 2, digging a pit of a buffer layer; 3, constructing a concrete cushion and a waterproof layer; 4, constructing a foundation raft; 5, filling the dewatering well; 6, laying the buffer layer; 7, filling and pouring a concrete cushion; 8, reserving the waterproof layer and constructing a protecting layer of the waterproof layer; 9, adhering expansive type sealing rubber strips; 10, bound connecting the foundation raft reinforcing steel bars; and 11, supplementarily pouring the foundation raft. The method has the beneficial effects that the method of construction of flexibly closing the dewatering well in the foundation pit is adopted, the problem that the foundation raft and the waterproof layer are cracked due to hogging moment above the dewatering well can be effectively solved, so that the requirement of the method for construction on arranging the dewatering well in a huge foundation pit is satisfied, and compared with a conventional dewatering method, the method can save 2/3 dewatering cost, can shorten the construction period and meets the efficient energy-saving green construction requirements.
Description
Technical field
The present invention relates to arrange in a kind of foundation ditch the job practices of dewatering well and the flexible sealing of dewatering well, belong to construction engineering technical field.
Background technology
At present, China residential quarters all arrange the underground garage that covers the building line scope, thereby building foundation pit area several times are enlarged, and the way of traditional foundation ditch periphery dewatering well can't satisfy the precipitation requirement, therefore generally adopts the way of arranging dewatering well precipitation in the foundation ditch.But precipitation borehole wall bearing capacity is far above natural ground, and after the dewatering well sealing, seepage becomes a national technical barrier of builing industry because the pipe well wall to its top waterproofing course and basic raft plate generation hogging moment, often causes waterproofing course and basic raft plate cracking.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of safe and reliable, economical rationality, arrange the job practices of dewatering well and the flexible sealing of dewatering well in the workable foundation ditch, solved the precipitation borehole wall and produced waterproofing course and the basic raft plate cracking seepage guardian technique difficult problem that hogging moment causes, for arranging in the huge foundation ditch that dewatering well provides reliable technical guarantee.
The present invention is that the technical scheme that its technical problem of solution adopts is: arrange the job practices of dewatering well and the flexible sealing of dewatering well in the described foundation ditch, it is characterized in that taking following steps:
1) in foundation ditch, arranges dewatering well;
2) dig the cushion coat pit: from the dewatering well center line to around expand and add deep excavation 50 ㎜～100 ㎜ pits in 500 ㎜～700 ㎜ scopes;
3) concrete cushion and construction of waterproof layer: the concreting bed course is to pit edge, at concrete cushion top laying water-proof coiled material to pit edge;
4) basic raft plate construction: from the dewatering well center line to around extend to basic raft slab muscle lap length 2～3 times of width places stay and establish concrete construction joint, and reserve and satisfy the reinforcing bar that mutually staggers and overlap;
5) tamp dewatering well: after foundation pit dewatering is complete, adopt medium sand to tamp in the dewatering well, adopt the C30 expansive concrete to tamp in the scope from the pit soffit to the dewatering well degree of depth 1000～2000 ㎜;
6) lay cushion coat: laying depth is the extruded polystyrene board of 50 ㎜～100 ㎜ in pit;
7) replenish the concreting bed course: pouring concrete bed course after the extruded polystyrene board upper supplementary;
8) reserve the construction of waterproofing course and topping thereof: mend waterproof roll after the pouring concrete bed course is laid after replenishing, and tightly paste with waterproof roll overlap joint 200mm, at concreting topping on the waterproof roll and on the rear benefit waterproof roll;
9) paste intumescent watertight rubber bar: paste intumescent watertight rubber bar at concrete construction joint depth of section middle part;
10) colligation connects basic raft slab muscle: carry out bar splicing and connect according to the adjacent joint center 1.35 times of lapped length of steel bar that mutually stagger;
11) the additional underpin raft plate that waters: adopt than the expansive concrete that has watered a strength grade of underpin raft plate hight and replenish rear casting foundation raft plate.
The invention has the beneficial effects as follows:
Adopt the flexible closure construction method of precipitation well in foundation pit, can effectively solve basic raft plate and a waterproof layer cracking difficult problem that dewatering well top hogging moment causes, satisfied the job practices requirement that dewatering well is set in the huge foundation ditch, save precipitation expense 2/3 than traditional precipitation method, can shorten construction period, and meet energy-efficient green construction requirement.
Description of drawings
Fig. 1 is the flexible closure construction layout plan of precipitation well in foundation pit.
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Among the figure: 1, dewatering well 2, pit 3, concrete construction joint 4, rear casting foundation raft plate 5, concrete cover 6, extruded polystyrene board 7, C30 expansive concrete 8, medium sand 9, concrete cushion 10, rear pouring concrete bed course 11, waterproof roll 12, rear benefit waterproof roll 13, basic raft plate 14, reinforcing bar 15, intumescent watertight rubber bar.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described further:
As depicted in figs. 1 and 2, arrange the job practices of dewatering well and the flexible sealing of dewatering well in the foundation ditch of the present invention, take following steps:
1) according to the precipitation design attitude, in foundation ditch, arranges dewatering well 1;
2) dig the cushion coat pit: be excavated at the bottom of the design of foundation pit behind the absolute altitude, from dewatering well 1 center line to around expand 500 ㎜ scopes and add deep excavation 50 ㎜ pits 2;
3) concrete cushion and construction of waterproof layer: concreting bed course 9 is to pit 2 edges, at concrete cushion 9 top laying water-proof coiled materials 11 to pit 2 edges;
4) basic raft plate construction: from dewatering well 1 center line to around extend to basic raft plate 13 lapped length of steel bar 2 times of width places stay and establish concrete construction joint 3, and reserve and satisfy the reinforcing bar 14 that mutually staggers and overlap;
5) tamp dewatering well: after foundation pit dewatering was complete, dewatering well 1 interior employing medium sand 8 tamped, and adopted C30 expansive concrete 7 to tamp in the scope of 1 degree of depth, 1000 ㎜ from pit 2 soffits to dewatering well;
6) lay cushion coat: be the extruded polystyrene board 6 of 50 ㎜ at pit 2 interior laying depths;
7) replenish the concreting bed course: pouring concrete bed course 10 after extruded polystyrene board 6 replenishes;
8) reserve the construction of waterproofing course and topping thereof: mend waterproof roll 12 after pouring concrete bed course 10 is laid after replenishing, and tightly paste with waterproof roll 11 overlap joint 200mm, at concreting topping 5 on the waterproof roll 11 and on the rear benefit waterproof roll 12;
9) paste intumescent watertight rubber bar: paste intumescent watertight rubber bar 15 at concrete construction joint 3 depth of sections middle part;
10) colligation connects basic raft slab muscle: carry out reinforcing bar 14 overlap joint and connect according to the adjacent joint center 1.35 times of lapped length of steel bar that mutually stagger, and satisfy the requirement of bar splice area occupation ratio 50%;
11) the additional underpin raft plate that waters: adopt than the expansive concrete that has watered underpin raft plate 13 high strength grades and replenish rear casting foundation raft plate 4.
Claims (1)
1. arrange dewatering well and the flexible job practices of sealing of dewatering well in a foundation ditch, it is characterized in that taking following steps:
1) in foundation ditch, arranges dewatering well (1);
2) dig the cushion coat pit: from dewatering well (1) center line to around expand and add deep excavation 50 ㎜～100 ㎜ pits (2) in 500 ㎜～700 ㎜ scopes;
3) concrete cushion and construction of waterproof layer: concreting bed course (9) is to pit (2) edge, at concrete cushion (9) top laying water-proof coiled material (11) to pit (2) edge;
4) basic raft plate construction: from dewatering well (1) center line to around extend to basic raft plate (13) lapped length of steel bar 2～3 times of width places stay and establish concrete construction joint (3), and reserve and satisfy the reinforcing bar (14) that mutually staggers and overlap;
5) tamp dewatering well: after foundation pit dewatering is complete, adopt medium sand (8) to tamp in the dewatering well (1), adopt C30 expansive concrete (7) to tamp in the scope from pit (2) soffit to dewatering well (1) degree of depth 1000～2000 ㎜;
6) lay cushion coat: laying depth is the extruded polystyrene board (6) of 50 ㎜～100 ㎜ in pit (2);
7) replenish the concreting bed course: pouring concrete bed course (10) after extruded polystyrene board (6) upper supplementary;
8) reserve the construction of waterproofing course and topping thereof: mend waterproof roll (12) after pouring concrete bed course (10) is laid after replenishing, and tightly paste the upper and upper concreting topping (5) of rear benefit waterproof roll (12) at waterproof roll (11) with waterproof roll (11) overlap joint 200mm;
9) paste intumescent watertight rubber bar: paste intumescent watertight rubber bar (15) at concrete construction joint (3) depth of section middle part;
10) colligation connects basic raft slab muscle: carry out reinforcing bar (14) overlap joint and connect according to the adjacent joint center 1.35 times of lapped length of steel bar that mutually stagger;
11) the additional underpin raft plate that waters: adopt than the expansive concrete that has watered the high strength grade of underpin raft plate (13) and replenish rear casting foundation raft plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579869.7A CN103031849B (en) | 2012-12-27 | 2012-12-27 | Method for construction of arranging dewatering well in foundation pit and flexibly closing dewatering well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579869.7A CN103031849B (en) | 2012-12-27 | 2012-12-27 | Method for construction of arranging dewatering well in foundation pit and flexibly closing dewatering well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103031849A true CN103031849A (en) | 2013-04-10 |
| CN103031849B CN103031849B (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210579869.7A Expired - Fee Related CN103031849B (en) | 2012-12-27 | 2012-12-27 | Method for construction of arranging dewatering well in foundation pit and flexibly closing dewatering well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196045A (en) * | 2014-08-28 | 2014-12-10 | 青岛海川建设集团有限公司 | Well mouth sealing device and method for deep well and dewatering well in underground garage foundation pit |
| CN110939143A (en) * | 2019-11-29 | 2020-03-31 | 中国建筑第四工程局有限公司 | Simple and easy core section of thick bamboo stepping water conservancy diversion drainage structures |
| CN112575801A (en) * | 2020-12-04 | 2021-03-30 | 中冶天工集团有限公司 | Method for plugging dewatering well |
| CN115324090A (en) * | 2022-10-13 | 2022-11-11 | 山东金城建设有限公司 | Underground engineering pit-in-pit dewatering and well sealing construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2162122C2 (en) * | 1998-06-17 | 2001-01-20 | Уральская государственная академия путей сообщения | Method for reducing subsoil water level near buildings and structures |
| CN101761096A (en) * | 2009-12-14 | 2010-06-30 | 山东万鑫建设有限公司 | Anti-crack and anti-leak construction method of arranging tower crane foundation below waterproof baseplate |
-
2012
- 2012-12-27 CN CN201210579869.7A patent/CN103031849B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2162122C2 (en) * | 1998-06-17 | 2001-01-20 | Уральская государственная академия путей сообщения | Method for reducing subsoil water level near buildings and structures |
| CN101761096A (en) * | 2009-12-14 | 2010-06-30 | 山东万鑫建设有限公司 | Anti-crack and anti-leak construction method of arranging tower crane foundation below waterproof baseplate |
Non-Patent Citations (3)
| Title |
|---|
| 中建一局建设发展公司: "金融街B7大厦工程深基坑降水与止水施工总结", 《工程质量》, no. 4, 28 February 2008 (2008-02-28), pages 9 - 1 * |
| 刘勇等: "大孔降水井封井工法", 《建筑技术》, vol. 43, no. 12, 15 December 2012 (2012-12-15) * |
| 李勇: "北京城建大厦地下室防水施工", 《中国建筑防水》, no. 5, 31 May 2004 (2004-05-31) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196045A (en) * | 2014-08-28 | 2014-12-10 | 青岛海川建设集团有限公司 | Well mouth sealing device and method for deep well and dewatering well in underground garage foundation pit |
| CN104196045B (en) * | 2014-08-28 | 2016-08-17 | 青岛海川建设集团有限公司 | Deep-well precipitation well head well-sealing device and method in underground garage foundation ditch |
| CN110939143A (en) * | 2019-11-29 | 2020-03-31 | 中国建筑第四工程局有限公司 | Simple and easy core section of thick bamboo stepping water conservancy diversion drainage structures |
| CN112575801A (en) * | 2020-12-04 | 2021-03-30 | 中冶天工集团有限公司 | Method for plugging dewatering well |
| CN115324090A (en) * | 2022-10-13 | 2022-11-11 | 山东金城建设有限公司 | Underground engineering pit-in-pit dewatering and well sealing construction method |
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| Publication number | Publication date |
|---|---|
| CN103031849B (en) | 2014-11-26 |
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Granted publication date: 20141126 |