CN103866779A - Construction method of water stopping surrounding and protecting structure of soft soil foundation building foundation pit - Google Patents
Construction method of water stopping surrounding and protecting structure of soft soil foundation building foundation pit Download PDFInfo
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- CN103866779A CN103866779A CN201410065288.0A CN201410065288A CN103866779A CN 103866779 A CN103866779 A CN 103866779A CN 201410065288 A CN201410065288 A CN 201410065288A CN 103866779 A CN103866779 A CN 103866779A
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Abstract
The invention discloses a construction method of a water stopping surrounding and protecting structure of a soft soil foundation building foundation pit. The construction method is characterized by comprising the following steps that a rock ballast layer is arranged on the soft foundation of the foundation pit to be constructed; a groove is downwards dug from the surface of the rock ballast layer around the foundation pit to be constructed until the depth of the dug groove reaches a low-permeability clay layer; homogeneous clay is filled into the groove for forming a clay water stopping curtain; a foundation pit blocking wall is arranged in the clay water stopping curtain, and the inner side and the outer side of the foundation pit blocking wall are respectively compacted and fixed by the homogeneous clay; a horizontal supporter is arranged in the foundation pit surrounded by the foundation pit blocking wall, and the construction of the water stopping surrounding and protecting structure is completed. The method has the advantages that the depth of the groove reaches the low-permeability clay layer, the good water stopping effect of the clay water stopping curtain is ensured, the maintenance work procedure of the clay water stopping curtain after the construction is not needed, the water stopping effect can be immediately realized after the construction completion, the construction process is fast and convenient, the construction work period is greatly shortened, the homogeneous clay can be locally dug in near places, and the construction cost is reduced.
Description
Technical field
The present invention relates to a kind of construction method of foundation pit enclosure structure, especially a kind of construction method of sealing space enclosing structure of soft foundation building foundation pit.
Background technology
At present in building foundation pit soil excavation engineering, generally forming one continuous body of wall around the edge of foundation ditch with engaged cement mixing pile or high-pressure rotary jet grouting pile makes water-stop curtain, cement mixing pile or high-pressure rotary jet grouting pile start from ground to enter the hypotonicity argillic horizon under foundation ditch downwards, make the fluid-tight space of the inner formation of foundation ditch.
The basic execution conditions of cement mixing pile or high-pressure rotary jet grouting pile are that levelling of the land, the soil body are even, neither too hard, nor too soft, cannot on the rock ballast layer that has the foreign material such as ratchel, construct; And in the construction place of the soft foundation such as marsh, coastal tidal land, argillic horizon is deep, physical features is low and groundwater table is high, while making construction land, need to build the thicker rock ballast layer of the ground backfill at place, place and building to raise the absolute altitude in place, thereby provide condition for construction.Carry out with this understanding in the excavation construction process of building foundation pit the effect of the water-stop curtain particular importance that seems.But because cement mixing pile or high-pressure rotary jet grouting pile almost cannot be at such field constructions, therefore such soft foundation building foundation pit suitable water stop curtain structure without comparison.
Summary of the invention
Technical problem to be solved by this invention is to provide the construction method of the sealing space enclosing structure of the soft foundation building foundation pit of a kind of convenient construction and energy conservation.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of construction method of sealing space enclosing structure of soft foundation building foundation pit, comprises the following steps:
Described groove is inverted trapezoidal structure.Prevent the sidewall generation avalanche of groove.
The bottom of described groove is 0.5m ~ 1.0m to the vertical distance of the bottom of described rock ballast layer, and the outside of described retaining wall in foundation pits is 0.6m ~ 1.2m to the horizontal range of the bottom outside of described groove.The bottom that guarantees groove is arranged in hypotonicity argillic horizon, makes the clay water-stop curtain between retaining wall in foundation pits outside and trenched side-wall play good stagnant water effect.
The slope angle of the sidewall of described groove is 45 ° to 75 °.Effectively prevent the sidewall generation avalanche of groove.
Described retaining wall in foundation pits is made up of the steel sheet pile of the edge setting of multiple foundation ditches around needs constructions or concrete drilling bored concrete pile or precast concrete pile.Adopt homogeneous clay as clay water-stop curtain, for the retaining wall in foundation pits of existing various species provides favourable construction environment, convenient and quick construction.
Compared with prior art, the invention has the advantages that the degree of depth of groove reaches hypotonicity argillic horizon, guaranteed that the clay water-stop curtain between retaining wall in foundation pits outside and trenched side-wall plays good stagnant water effect; Clay water-stop curtain does not need maintenance operation after construction, constructs completely just can produce stagnant water effect at once, meanwhile, and excavation groove and to fill the work progress of homogeneous clay convenient rapidly, the construction period shortens greatly; Homogeneous clay can, from excavating on the spot near job site, without using extra power, reduce construction cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment mono-: a kind of construction method of sealing space enclosing structure of soft foundation building foundation pit, comprises the following steps:
Embodiment bis-: remainder is identical with embodiment mono-, its difference is that the thickness h of rock ballast layer 1 is 2m, the bottom of groove is 1.0m to the vertical distance d of the bottom of rock ballast layer 1, the slope angle of the sidewall of groove is 75 °, the outside of retaining wall in foundation pits 4 is 1.1m to the horizontal range s of the bottom outside of groove, and retaining wall in foundation pits 4 is made up of the concrete drilling bored concrete pile of the edge setting of multiple foundation ditches around needs construction.
Embodiment tri-: remainder is identical with embodiment mono-, its difference is that the thickness h of rock ballast layer 1 is 4m, the bottom of groove is 0.7m to the vertical distance d of the bottom of rock ballast layer 1, the slope angle of the sidewall of groove is 60 °, the outside of retaining wall in foundation pits 4 is 0.6m to the horizontal range s of the bottom outside of groove, and retaining wall in foundation pits 4 is made up of the steel sheet pile of the edge setting of multiple foundation ditches around needs construction.
Claims (5)
1. a construction method for the sealing space enclosing structure of soft foundation building foundation pit, is characterized in that comprising the following steps:
it is the rock ballast layer of 2m ~ 6m that thickness is set on the soft foundation that needs construction foundation pit;
in groove, fill homogeneous clay formation clay water-stop curtain;
2. the construction method of the sealing space enclosing structure of a kind of soft foundation building foundation pit according to claim 1, is characterized in that described groove is inverted trapezoidal structure.
3. the construction method of the sealing space enclosing structure of a kind of soft foundation building foundation pit according to claim 2, the bottom that it is characterized in that described groove is 0.5m ~ 1.0m to the vertical distance of the bottom of described rock ballast layer, and the outside of described retaining wall in foundation pits is 0.6m ~ 1.2m to the horizontal range of the bottom outside of described groove.
4. the construction method of the sealing space enclosing structure of a kind of soft foundation building foundation pit according to claim 3, is characterized in that the slope angle of the sidewall of described groove is 45 ° to 75 °.
5. the construction method of the sealing space enclosing structure of a kind of soft foundation building foundation pit according to claim 1, is characterized in that described retaining wall in foundation pits is made up of the steel sheet pile of the edge setting of multiple foundation ditches around needs construction or concrete drilling bored concrete pile or precast concrete pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410065288.0A CN103866779B (en) | 2014-02-26 | 2014-02-26 | A kind of construction method of sealing space enclosing structure of soft foundation building foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410065288.0A CN103866779B (en) | 2014-02-26 | 2014-02-26 | A kind of construction method of sealing space enclosing structure of soft foundation building foundation pit |
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| CN103866779A true CN103866779A (en) | 2014-06-18 |
| CN103866779B CN103866779B (en) | 2016-01-13 |
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| CN201410065288.0A Active CN103866779B (en) | 2014-02-26 | 2014-02-26 | A kind of construction method of sealing space enclosing structure of soft foundation building foundation pit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652460A (en) * | 2015-02-16 | 2015-05-27 | 中交一航局第一工程有限公司 | Integrated water stop structure for deep foundation pit |
| CN114753373A (en) * | 2022-04-13 | 2022-07-15 | 武汉国机岩土工程有限责任公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
| CN116005701A (en) * | 2023-01-06 | 2023-04-25 | 江苏力迈建设工程有限公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04336122A (en) * | 1991-05-10 | 1992-11-24 | Shimizu Corp | Constructing method for cut-off wall |
| CN201778330U (en) * | 2010-08-03 | 2011-03-30 | 中建一局集团第三建筑有限公司 | Clay water-stop curtain wall |
| CN201924365U (en) * | 2011-01-17 | 2011-08-10 | 东南大学 | Steel sheet pile and tube pile combined foundation ditch supporting structure |
| CN102787611A (en) * | 2012-08-10 | 2012-11-21 | 中国二冶集团有限公司 | Precipitation method for excavation of foundation pit at collapsible loess region |
| CN202689031U (en) * | 2012-05-23 | 2013-01-23 | 福建工程学院 | Deep foundation pit retaining and protecting retaining wall |
-
2014
- 2014-02-26 CN CN201410065288.0A patent/CN103866779B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04336122A (en) * | 1991-05-10 | 1992-11-24 | Shimizu Corp | Constructing method for cut-off wall |
| CN201778330U (en) * | 2010-08-03 | 2011-03-30 | 中建一局集团第三建筑有限公司 | Clay water-stop curtain wall |
| CN201924365U (en) * | 2011-01-17 | 2011-08-10 | 东南大学 | Steel sheet pile and tube pile combined foundation ditch supporting structure |
| CN202689031U (en) * | 2012-05-23 | 2013-01-23 | 福建工程学院 | Deep foundation pit retaining and protecting retaining wall |
| CN102787611A (en) * | 2012-08-10 | 2012-11-21 | 中国二冶集团有限公司 | Precipitation method for excavation of foundation pit at collapsible loess region |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652460A (en) * | 2015-02-16 | 2015-05-27 | 中交一航局第一工程有限公司 | Integrated water stop structure for deep foundation pit |
| CN114753373A (en) * | 2022-04-13 | 2022-07-15 | 武汉国机岩土工程有限责任公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
| CN114753373B (en) * | 2022-04-13 | 2022-11-11 | 武汉国机岩土工程有限责任公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
| CN116005701A (en) * | 2023-01-06 | 2023-04-25 | 江苏力迈建设工程有限公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
| CN116005701B (en) * | 2023-01-06 | 2023-10-24 | 江苏力迈建设工程有限公司 | Construction method of water-stopping enclosure structure of soft soil foundation building foundation pit |
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|---|---|
| CN103866779B (en) | 2016-01-13 |
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Owner name: HUANG JIYONG Free format text: FORMER OWNER: ZHENHAI CONSTRUCTION GROUP CO., LTD. Effective date: 20150410 |
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Effective date of registration: 20150410 Address after: 315040, room 15, No. 222, 201 drive drive road, Jiangdong Road, Jiangdong District, Zhejiang, Ningbo Applicant after: Huang Jiyong Address before: Brahma No. 1156 building, high tech Zone in Zhejiang province Ningbo City Heqing road 315040 23 floor Applicant before: ZHENHAI CONSTRUCTION GROUP CO., LTD. |
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