CN104775439A - Foundation pit support and water stop integrated structure and construction method thereof - Google Patents
Foundation pit support and water stop integrated structure and construction method thereof Download PDFInfo
- Publication number
- CN104775439A CN104775439A CN201510185268.1A CN201510185268A CN104775439A CN 104775439 A CN104775439 A CN 104775439A CN 201510185268 A CN201510185268 A CN 201510185268A CN 104775439 A CN104775439 A CN 104775439A
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- foundation pit
- wall
- construction method
- concrete
- pit supporting
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
The invention discloses a foundation pit support and water stop integrated structure and a construction method thereof. The foundation pit support and water stop integrated structure comprises a concrete wall, wherein the concrete wall is arranged under the ground of the periphery of a foundation pit, and a plurality of cylindrical reinforcement cages are vertically arranged in the concrete wall. The construction method of the foundation pit support and water stop integrated structure is characterized by comprising the following steps of excavating a guide channel, casting a guide wall, forming a channel in the channel section, arranging the reinforcement cages, casting concrete, and the like. The foundation pit support and water stop integrated structure and the construction method have the characteristics that the rigidity of an underground continuous wall is large, and the water stop effect is good; the installation of the reinforcement cages of a row pile support structure is convenient and rapid, the technology difficulty is low, the construction is rapid, the quality can be easily controlled, and the foundation pit support and water stop integrated structure is especially suitable for water-rich sandy gravel ground layers.
Description
Technical field
The present invention relates to the realm of building construction, particularly relate to a kind of pattern foundation pit supporting structure sealing integral structure and construction method thereof.
Background technology
Along with the scale of underground space development is increasing, build under Complex Hydrogeological Conditions the underground space due to water level high, permeability is large, and causes the situation of foundation pit supporting construction seepage commonplace, quality is wayward, causes difficulty also to the progress of underground space main structure construction.
Vertical support system conventional at present has campshed, hole-drilling interlocking pile, diaphragm wall, cement soil wall etc.Although campshed support system cost is low, but discontinuous due to stake, generally will increase the safe handling of the measures of preventing water guarantee systems such as water-stop curtain, have that operation is many, occupied ground and a large problem of permanent space, and there is hidden danger in the combination of stake and water-stopping structure always, after campshed, increase the way of curtain, stake and curtain are respectively integrated, discontinuity, Guan Liang is needed to link between stake and stake, when curtain has a leakage point after stake, not easily discover, be also difficult to repair; , easily there is the problem of stake position sideslip and cutting deformation in hole-drilling interlocking pile system, once stake position sideslip and distortion, can have influence on supporting and the stagnant water effect of bitten pile support system in construction; The supporting of diaphragm wall system is safe and reliable, but amount of reinforcement is large, and in groove section, place the hanging device that bulky square reinforcing cage needs to take up an area greatly, lifting capacity is large in construction, will take double-machine lifting crane operating type for preventing square reinforcing cage to be out of shape simultaneously; Although cement wall support system continuity is better, can effective sealing, but the intensity of cement-soil is very low, generally need a large amount of shaped steel of increase and a large amount of anchor poles to make up the deficiency of intensity in using, not only waste economically, and a large amount of anchor pole of constructing below phreatic line, also there is certain potential safety hazard in itself in work progress.
Summary of the invention
For overcoming the deficiencies in the prior art, order of the present invention is to provide a kind of pattern foundation pit supporting structure sealing integral structure and construction method thereof, it not only has the feature that rigidity is large, stagnant water effect is good of diaphragm wall, also Row Piles Supporting Structure reinforcing cage is had to lay advantage easily, technology difficulty is little, quick construction, and quality easily controls, be particularly useful for rich water sand-pebble layer, do not need separately to establish water stop curtain structure of constructing separately.
For achieving the above object, present invention employs following technical scheme:
A kind of pattern foundation pit supporting structure sealing integral structure, it comprises the concrete wall being arranged at below foundation ditch peripheral ground, is provided with the cylindrical reinforcing steel cage of multiple vertical placement in concrete wall.
A construction method for pattern foundation pit supporting structure sealing integral structure, comprises the following steps:
1) at earth's surface excavation guide groove;
2) wall is led at guide groove sidewall concreting;
3) in guide groove, capture the earthwork with groover and form cuboid groove section, in cuboid groove section, use mud off;
4), bottom cuboid groove section after scarfing cinder, vertically in cuboid groove section cylindrical reinforcing steel cage is placed and fixing;
5) in cylindrical reinforcing steel cage, transfer cast conduit, and carry out the second time clear end;
6) by pouring into a mould conduit fluid concrete until concrete liquid level is to cuboid groove section top;
7) according to step 1)-6) circulation construction, until form whole pattern foundation pit supporting structure water-stopping structure.
Further, for described step 1), first will carry out levelling of the land and surveying and locating before guide groove excavation, guide groove can with hand excavation or mechanical equivalent of light excavation, channel widths=treat excavation cuboid groove section width+lead wall width.
Further, for described step 2), leading wall is reinforced concrete structure, first wants assembling reinforcement and formwork before building, and leading wall height is 1000-1500mm, leads wall end face 50-100mm above ground level; Leading between wall after having built arranges interim wood support every 1-3m.
Further, for described step 4), by the mud circulation clear end, sediment thickness is not more than 5cmm, and described cylindrical reinforcing steel cage can carrying out step 1)-3) time makes.
Further, for described step 5), described cast catheter diameter is 4 ~ 10 times of concrete coarse aggregate particle diameter.
Further, for described step 6), strength grade of concrete is not less than C2O.
Beneficial effect of the present invention: (1) by campshed, diaphragm wall, water-stop curtain closes three is one, makes full use of that groove section inner concrete is built and the overall structure that formed reaches the object that support water stop realizes simultaneously; (2) the cylindrical reinforcing steel cage that design pitch is placed is pressed in groove section, avoiding and adopt conventional diaphragm wall support system in groove section, place the hanging device that occupation of land is large, lifting capacity is large required for square reinforcing cage, avoiding as preventing square reinforcing cage to be out of shape and the double-machine lifting crane operating type taked simultaneously; (3) use the grooving of grooving machinery to have grooving mechanization degree high, avoid the easy collapse hole of campshed formula supporting and protection structure pore-forming, the impact in pore forming process between adjacent holes; (4) compared with employing soldier pile+water stop curtain structure form, operation is avoided many, the large problem of occupied ground and permanent space; (5) compared with hole-drilling interlocking pile, lower to the requirement of concrete performance, it also avoid the leakage problems because boring dislocation causes simultaneously.
Accompanying drawing explanation
Fig. 1 is step 1) floor map;
Fig. 2 is step 1) generalized section;
Fig. 3 is step 2) floor map;
Fig. 4 is step 2) generalized section;
Fig. 5 is step 3) floor map;
Fig. 6 is step 3) generalized section;
Fig. 7 is step 4) floor map;
Fig. 8 is step 4) generalized section;
Fig. 9 is step 6) floor map;
Figure 10 is step 6) generalized section.
In figure: 1-concrete wall; 2-cylindrical reinforcing steel cage; 3-guide groove; 4-leads wall; 5-cuboid groove section; 6-mud; 7-concrete; The 8-soil body.
Detailed description of the invention
As shown in figs. 9-10, a kind of pattern foundation pit supporting structure sealing integral structure, comprises the concrete wall 1 being arranged at below foundation ditch peripheral ground, is provided with the cylindrical reinforcing steel cage 2 of multiple vertical placement in concrete wall 1.
As Figure 1-10 shows, a kind of construction method of pattern foundation pit supporting structure sealing integral structure, comprises the following steps:
1) at earth's surface excavation guide groove 3;
2) wall 4 is led at guide groove sidewall concreting;
3) in guide groove, capture the earthwork with groover and form cuboid groove section 5, in cuboid groove section 5, use mud 6 retaining wall;
4), bottom cuboid groove section 5 after scarfing cinder, vertically in cuboid groove section 5 cylindrical reinforcing steel cage 6 is placed and fixing;
5) in cylindrical reinforcing steel cage 2, transfer cast conduit, and carry out the second time clear end;
6) by pouring into a mould conduit fluid concrete until concrete liquid level is to cuboid groove section top;
7) according to step 1)-6) circulation construction, until form whole pattern foundation pit supporting structure water-stopping structure.
For described step 1), guide groove 3 first will carry out levelling of the land and surveying and locating before excavating, and guide groove can with hand excavation or mechanical equivalent of light excavation, channel widths=treat box cut section width+lead wall width.
For described step 2), lead wall 4 for reinforced concrete structure, first want assembling reinforcement and formwork before building, leading wall height is 1000-1500mm, leads wall end face 50-100mm above ground level; Leading between wall after having built arranges interim wood support every 1-3m.
For described step 4), by the mud circulation clear end, sediment thickness is not more than 5cmm.
For described step 5), described cast catheter diameter is 4 ~ 10 times of concrete coarse aggregate particle diameter.
For described step 6), strength grade of concrete is not less than C2O.
Claims (7)
1. a pattern foundation pit supporting structure sealing integral structure, is characterized in that comprising the concrete wall (1) being arranged at below foundation ditch peripheral ground, is provided with the cylindrical reinforcing steel cage (2) of multiple vertical placement in concrete wall (1).
2. a construction method for pattern foundation pit supporting structure sealing integral structure, is characterized in that comprising the following steps:
1) on earth's surface excavation guide groove (3);
2) wall (4) is led at guide groove sidewall concreting;
3) in guide groove, capture the earthwork with groover and form cuboid groove section (5), in cuboid groove section (5), use mud (6) retaining wall;
4), after cuboid groove section (5) bottom scarfing cinder, vertical placement cylindrical reinforcing steel cage (2) in cuboid groove section (5) is also fixing;
5) in cylindrical reinforcing steel cage (2), transfer cast conduit, and carry out the second time clear end;
6) by pouring into a mould conduit fluid concrete until concrete liquid level is to cuboid groove section top;
7) according to step 1)-6) circulation construction, until form whole pattern foundation pit supporting structure water-stopping structure.
3. the construction method of a kind of pattern foundation pit supporting structure sealing integral structure according to claim 2, it is characterized in that, for described step 1), first levelling of the land and surveying and locating will be carried out before guide groove (3) excavation, guide groove can with hand excavation or mechanical equivalent of light excavation, channel widths=treat excavation cuboid groove section width+lead wall width.
4. the construction method of a kind of pattern foundation pit supporting structure sealing integral structure according to Claims 2 or 3, it is characterized in that, for described step 2), leading wall (4) is reinforced concrete structure, first assembling reinforcement is wanted and formwork before building, leading wall height is 1000-1500mm, leads wall end face 50-100mm above ground level; Leading between wall after having built arranges interim wood support every 1-3m.
5. the construction method of a kind of pattern foundation pit supporting structure sealing integral structure according to any one of claim 2-4, it is characterized in that, for described step 4), by the mud circulation clear end, sediment thickness is not more than 5cmm, and described cylindrical reinforcing steel cage can carrying out step 1)-3) time makes.
6. the construction method of a kind of pattern foundation pit supporting structure sealing integral structure according to any one of claim 2-5, is characterized in that, for described step 5), described cast catheter diameter is 4 ~ 10 times of concrete coarse aggregate particle diameter.
7. the construction method of a kind of pattern foundation pit supporting structure sealing integral structure according to any one of claim 2-6, it is characterized in that, for described step 6), strength grade of concrete is not less than C2O.
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| CN201510185268.1A CN104775439B (en) | 2015-04-20 | 2015-04-20 | A kind of pattern foundation pit supporting structure sealing integral structure and its construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544556A (en) * | 2015-12-29 | 2016-05-04 | 湖北中南勘察基础工程有限公司 | Foundation pit supporting construction technology combining equal-thickness cement-soil diaphragm wall and tubular piles |
| CN105937218A (en) * | 2016-04-27 | 2016-09-14 | 中国建筑第五工程局有限公司 | Construction method of underground diaphragm wall |
| CN105970916A (en) * | 2016-06-30 | 2016-09-28 | 中铁十八局集团第五工程有限公司 | Construction method for plain concrete underground diaphragm wall of deep foundation pit |
| CN108049393A (en) * | 2017-11-24 | 2018-05-18 | 中建铁投轨道交通建设有限公司 | For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed |
| CN110106888A (en) * | 2019-04-02 | 2019-08-09 | 刘侨 | It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544556A (en) * | 2015-12-29 | 2016-05-04 | 湖北中南勘察基础工程有限公司 | Foundation pit supporting construction technology combining equal-thickness cement-soil diaphragm wall and tubular piles |
| CN105937218A (en) * | 2016-04-27 | 2016-09-14 | 中国建筑第五工程局有限公司 | Construction method of underground diaphragm wall |
| CN105970916A (en) * | 2016-06-30 | 2016-09-28 | 中铁十八局集团第五工程有限公司 | Construction method for plain concrete underground diaphragm wall of deep foundation pit |
| CN108049393A (en) * | 2017-11-24 | 2018-05-18 | 中建铁投轨道交通建设有限公司 | For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed |
| CN110106888A (en) * | 2019-04-02 | 2019-08-09 | 刘侨 | It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method |
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| CN104775439B (en) | 2017-03-15 |
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Effective date of registration: 20200408 Address after: 100000 No. three Li River Road, Beijing, Haidian District, 9 Patentee after: CHINA CONSTRUCTION BASE BACILITIES Co.,Ltd. Address before: 518022, room 13, building 2105, Zhongjian building, No. 1302 Shennan East Road, Shenzhen, Guangdong, Luohu District Patentee before: CHINA CONSTRUCTION SOUTH INVESTMENT Co.,Ltd. |
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