CN1548661A - Method of supporting foundation pit in soft layer with brad - Google Patents
Method of supporting foundation pit in soft layer with brad Download PDFInfo
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- CN1548661A CN1548661A CNA031169279A CN03116927A CN1548661A CN 1548661 A CN1548661 A CN 1548661A CN A031169279 A CNA031169279 A CN A031169279A CN 03116927 A CN03116927 A CN 03116927A CN 1548661 A CN1548661 A CN 1548661A
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- foundation ditch
- soft stratum
- plate brad
- soil
- brad supporting
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Abstract
The present invention is method of supporting foundation pit in soft layer with brad. Around the foundation pit, antiseepage veil comprising cement and soil stirring pile, high pressure rotarily sprayed pile or densified grout is formed to separate water and stabilize the soil wall. Then, brads are inserted via the veil into soil around the foundation pit, and the brads are hollow ones, into which cement mortar is grouted. The soil slope is reinforced through inclined grouting. Finally, the exposed parts of the brads are connected with steel bar and steel wire net, and concrete surface layer is sprayed. The method of the present invention may be in soft soil layer with relatively high underground water level.
Description
Technical field:
The present invention relates to a kind of building method, relate in particular to a kind of soil nailing, relate in particular to a kind of method of utilizing plate brad supporting soft stratum foundation ditch.
Background technology:
In construction work, need excavation pit usually, going along with sb. to guard him as base pit engineering with plate brad supporting is common method, but generally plate brad supporting is very big to the dependence on stratum.According to " foundation pit soil nailing designing technique rules " (CECS96:97) regulation of 1.0.2 bar: plate brad supporting is applicable to the following soil body: sand, silt and gravelly soil, the plain fill of certain cementing power and compaction rate, hard or the cohesive soil moulded firmly and weathered rock formation etc. are arranged.It is lower also to be that plate brad supporting is only applicable to groundwater table, and in independence, the structural stratum preferably, it is higher to that is to say that plate brad supporting is not suitable for groundwater table, in the soft stratum of being made up of saturated silty clay, silt clay etc.So the job practices that prior art adopts in soft stratum foundation pit construction process is comparatively complicated, and cost is also higher.
Summary of the invention:
Technical problem to be solved by this invention is: because in the prior art, it is higher that plate brad supporting is not suitable for groundwater table, in the soft stratum of being made up of saturated silty clay, silt clay etc., influenced the efficient and the effect of constructing.The technical scheme that the present invention is adopted for solution above-mentioned technical problem of the prior art provides a kind of method of utilizing plate brad supporting soft stratum foundation ditch, described method is to be provided with seepage proof curtain around foundation ditch, described seepage proof curtain is by cement mixing method, high-pressure rotary jet grouting pile or compaction grouting constitute, solved the water-resisting property of the soil body like this, the stability of Tu Bi in independence and the soil excavation process, then with the soil body behind downward-sloping compaction grouting of level or the secondary pressure consolidation by grouting slope, secondly, around foundation ditch, insert soil nailing, described soil nailing passes seepage proof curtain, enter the soil body, described soil nailing is the hollow tubular structure thing, in described soil nailing, inject cement paste or cement mortar, the material of described tubing can be metal material, as reinforcing bar, steel pipe, also can be nonmetals, described nonmetals comprise mao bamboon, when adopting mao bamboon as soil nailing, each joint of mao bamboon is got through, further, can also be provided with at least one slurry outlet on the surface of described mao bamboon, make cement paste from slurry outlet, overflow, can be more firm mao bamboon be fixed in the soil body, at last, use reinforcing bar and steel mesh reinforcement to couple together described soil nailing exposed junction, last sprayed mortar surface layer, the sprayed mortar surface layer of formation arrangement of reinforcement, described soil nailing can adopt prestressing force soil layer anchor pole to replace.
The present invention and prior art contrast, and in work progress, bracing of foundation pit is not to finish before soil excavation, but progressively finishes in the soil excavation process, has guaranteed the reliability and stability of soft layer plate brad supporting.It is higher that the present invention can be used for groundwater table, in the soft stratum of being made up of saturated silty clay, silt clay etc.
Description of drawings
Fig. 1 is an a kind of embodiment schematic diagram that utilizes the method for plate brad supporting soft stratum foundation ditch of the present invention.
The specific embodiment
As shown in Figure 1, a kind of method of utilizing plate brad supporting soft stratum foundation ditch of the present invention, in the soil excavation process with cement mixing method, high-pressure rotary jet grouting pile or compaction grouting constitute seepage proof curtain 3, then with the soil body behind downward-sloping compaction grouting of level or the secondary pressure consolidation by grouting slope, secondly, around foundation ditch, insert soil nailing 2, described soil nailing 2 passes seepage proof curtain 3, enter the soil body, described soil nailing 2 is the tubing of hollow, in described soil nailing 2, inject cement paste or cement mortar, the material of described tubing can be reinforcing bar, steel pipe, nonmetals, described nonmetals comprise mao bamboon, when adopting mao bamboon as soil nailing 2, each joint of mao bamboon need be got through, further, can also be provided with at least one slurry outlet on the surface of described mao bamboon, make cement paste from slurry outlet, overflow, can be more firm mao bamboon be fixed in the soil body, last, use reinforcing bar and steel mesh reinforcement to couple together described soil nailing 2 exposed junctions, last sprayed mortar surface layer 1 forms the sprayed mortar surface layer 1 of arrangement of reinforcement, has improved the stability and the intensity of foundation ditch, the present invention also can adopt prestressed anchor to replace soil nailing, reaches the reinforcing retaining wall, the purpose of restrained deformation.
Claims (9)
1, a kind of method of utilizing plate brad supporting soft stratum foundation ditch, be included in the process that the nail supporting is set in the soil body, it is characterized in that: be included in the described process that plate brad supporting is set in the soil body foundation ditch around the step of seepage proof curtain is set, also comprise step, and around foundation ditch, insert soil nailing and in described soil nailing, inject the step of cement paste or cement mortar with the soil body behind downward-sloping compaction grouting of level or the secondary pressure consolidation by grouting slope.
2, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 1 is characterized in that: described soil nailing exposed junction uses reinforcing bar to be connected with steel mesh reinforcement, sprayed mortar surface layer then, the sprayed mortar surface layer of formation arrangement of reinforcement.
3, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 1 is characterized in that: described soil nailing adopts total length bonding anchor pole.
4, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 1 is characterized in that: described seepage proof curtain is made of cement mixing method, high-pressure rotary jet grouting pile or compaction grouting.
5, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 1 is characterized in that: described soil nailing is the hollow tubular structure thing.
6, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 5 is characterized in that: the material of described hollow tubular structure property management material is a metal material.
7, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 5 is characterized in that: the material of described hollow tubular structure property management material is nonmetals.
8, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 7 is characterized in that: described nonmetals adopt mao bamboon, and each joint of mao bamboon is got through.
9, the method for utilizing plate brad supporting soft stratum foundation ditch as claimed in claim 8 is characterized in that: be provided with at least one slurry outlet on the surface of described mao bamboon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031169279A CN1548661A (en) | 2003-05-14 | 2003-05-14 | Method of supporting foundation pit in soft layer with brad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031169279A CN1548661A (en) | 2003-05-14 | 2003-05-14 | Method of supporting foundation pit in soft layer with brad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1548661A true CN1548661A (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031169279A Pending CN1548661A (en) | 2003-05-14 | 2003-05-14 | Method of supporting foundation pit in soft layer with brad |
Country Status (1)
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| CN (1) | CN1548661A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906779A (en) * | 2010-08-11 | 2010-12-08 | 余闯 | Supporting process of portal frame type anchor pipe soil nail spraying net and modified reinforcing cement mortar employed by same |
| CN101701459B (en) * | 2009-10-16 | 2011-05-04 | 宝钢工程技术集团有限公司 | Method for processing soft soil foundation of intertidal belt to form construction working face |
| CN101250871B (en) * | 2008-03-11 | 2012-06-06 | 青建集团股份公司 | Pile-spraying rotary construction method using tide difference subsection pile-formation |
| CN102493462A (en) * | 2011-12-09 | 2012-06-13 | 中国建筑西南勘察设计研究院有限公司 | Supporting structure for oppositely-dragging cast-in-place pile foundation pit |
| CN102635112A (en) * | 2012-04-09 | 2012-08-15 | 湖南宏禹水利水电岩土工程有限公司 | Controlled construction process for compaction grouting piles |
| CN102653944A (en) * | 2012-05-04 | 2012-09-05 | 中天建设集团有限公司 | Foundation pit support structure |
| CN103266604A (en) * | 2013-05-03 | 2013-08-28 | 中冶集团武汉勘察研究院有限公司 | Hoop-type circular-section anchor-rod slide-resistant pile and construction method thereof |
| CN106677192A (en) * | 2017-03-03 | 2017-05-17 | 周同和 | Row pile anchoring cement soil pile continuous wall supporting structure and construction process thereof |
| CN107119692A (en) * | 2017-05-03 | 2017-09-01 | 中交航局第工程有限公司 | A kind of Soft Deep Foundation Pit support construction process |
| CN107503768A (en) * | 2017-08-23 | 2017-12-22 | 广西大学 | The method of the oblique Soil-nailed of Small Data Sets shallow embedding tunnel overlying ground |
| CN115198760A (en) * | 2022-07-12 | 2022-10-18 | 中国建筑第八工程局有限公司 | Support system for soft soil geological pit and construction method thereof |
-
2003
- 2003-05-14 CN CNA031169279A patent/CN1548661A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250871B (en) * | 2008-03-11 | 2012-06-06 | 青建集团股份公司 | Pile-spraying rotary construction method using tide difference subsection pile-formation |
| CN101701459B (en) * | 2009-10-16 | 2011-05-04 | 宝钢工程技术集团有限公司 | Method for processing soft soil foundation of intertidal belt to form construction working face |
| CN101906779A (en) * | 2010-08-11 | 2010-12-08 | 余闯 | Supporting process of portal frame type anchor pipe soil nail spraying net and modified reinforcing cement mortar employed by same |
| CN101906779B (en) * | 2010-08-11 | 2012-05-23 | 余闯 | Supporting process of portal frame type anchor pipe soil nail spraying net and modified reinforcing cement mortar employed by same |
| CN102493462B (en) * | 2011-12-09 | 2015-09-30 | 中国建筑西南勘察设计研究院有限公司 | To pull-type poured pile base pit supporting construction |
| CN102493462A (en) * | 2011-12-09 | 2012-06-13 | 中国建筑西南勘察设计研究院有限公司 | Supporting structure for oppositely-dragging cast-in-place pile foundation pit |
| CN102635112A (en) * | 2012-04-09 | 2012-08-15 | 湖南宏禹水利水电岩土工程有限公司 | Controlled construction process for compaction grouting piles |
| CN102635112B (en) * | 2012-04-09 | 2014-11-05 | 湖南宏禹水利水电岩土工程有限公司 | Controlled construction process for compaction grouting piles |
| CN102653944A (en) * | 2012-05-04 | 2012-09-05 | 中天建设集团有限公司 | Foundation pit support structure |
| CN103266604A (en) * | 2013-05-03 | 2013-08-28 | 中冶集团武汉勘察研究院有限公司 | Hoop-type circular-section anchor-rod slide-resistant pile and construction method thereof |
| CN103266604B (en) * | 2013-05-03 | 2015-11-04 | 中冶集团武汉勘察研究院有限公司 | A kind of Hoop-type circular-section anchor-rod slide-resistant pile and construction method thereof |
| CN106677192A (en) * | 2017-03-03 | 2017-05-17 | 周同和 | Row pile anchoring cement soil pile continuous wall supporting structure and construction process thereof |
| CN107119692A (en) * | 2017-05-03 | 2017-09-01 | 中交航局第工程有限公司 | A kind of Soft Deep Foundation Pit support construction process |
| CN107503768A (en) * | 2017-08-23 | 2017-12-22 | 广西大学 | The method of the oblique Soil-nailed of Small Data Sets shallow embedding tunnel overlying ground |
| CN115198760A (en) * | 2022-07-12 | 2022-10-18 | 中国建筑第八工程局有限公司 | Support system for soft soil geological pit and construction method thereof |
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