CN1043263C - Construction method for building foundation pit stope support - Google Patents
Construction method for building foundation pit stope support Download PDFInfo
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- CN1043263C CN1043263C CN 97112023 CN97112023A CN1043263C CN 1043263 C CN1043263 C CN 1043263C CN 97112023 CN97112023 CN 97112023 CN 97112023 A CN97112023 A CN 97112023A CN 1043263 C CN1043263 C CN 1043263C
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- cement
- continuous wall
- soil
- soil nailing
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Abstract
The present invention relates to a construction method for supporting a foundation pit slope. The present invention aims to avoid using a plenty of reinforced bars and concrete and reduce fabrication cost. The construction method comprises the following steps: strengthening soil bodies for supporting a foundation to form a cement soil lower continuous wall; inserting vertical steel bars into the continuous wall before cement soil is not solidified; the soil bodies of the foundation pit are excavated by layers along the continuous wall; forming brad holes and anchor rod holes on a working surface formed by the excavated continuous wall; grouting the brad holes and the anchor rod holes; inserting steel bars into the brad holes and the anchor rod holes filled with slurry to form brads and anchor rods; forming a protective surface on the working surface.
Description
The present invention relates to the reinforcing of ground, particularly relate to the supporting method of building foundation pit side slope.
At present for the higher area of loose, weak groundwater table, the foundation pit stope support engineering be extensive use of steel concrete, steel sheet pile add in support wait and support soil pressure, water pressure.Its shortcoming mainly is that effective life was generally 6 months because of pattern foundation pit supporting structure generally belongs to occasional nature.Select for use a large amount of steel to make rigid retaining wall and can cause the unreasonable of use material, construction costs is higher, and is long in time limit.
The object of the present invention is to provide a kind of job practices of new building foundation pit stope support, this method can reduce cost when guaranteeing quality greatly, and construction is simple.
Above-mentioned purpose of the present invention is that the job practices by following building foundation pit stope support realizes that this method step comprises:
A) at first the supporting foundation soil body is reinforced the formation cement-earth underground continuous wall;
B) before not solidifying, in this cement-earth underground continuous wall, inserts cement-soil vertical elongated rigid member;
C) along above-mentioned cement-earth underground continuous wall according to desired depth stage excavation foundation ditch foundation soil body;
D) at along continuous straight runs on the work plane that forms by above-mentioned cement-earth underground continuous wall that excavates out and tiltedly to forming soil nailing hole and bolthole;
E) slip casting is carried out in above-mentioned soil nailing hole and bolthole, changed the intensity of above-mentioned hole surrounding soil;
F) thus inserting elongated rigid member in above-mentioned soil nailing hole that is perfused with slurries and bolthole forms soil nailing and anchor pole respectively;
G) on above-mentioned work plane, form protective surface.
In said method, above-mentioned elongated rigid member can adopt reinforcing bar.
In said method, above-mentioned elongated rigid member adopts steel pole.
In said method, above-mentioned protective surface is by linked network at first is set on work plane, and the mode of sprayed mortar forms thereon then.
In said method, above-mentioned linked network is fixed on the above-mentioned soil nailing.
In said method, above-mentioned protective surface is direct injection cement grout and forming thereon.
In said method, above-mentioned maintenance face forms by artificial concrete coating.
In said method, the slurry filling of above-mentioned soil nailing hole and bolthole adopts the compacted slip casting method of high pressure, splits the power slip casting method, and perhaps the compaction grouting method is carried out.
In said method, above-mentioned cement-earth underground continuous wall is to adopt paddling process, the churning method, and the high-pressure slip-casting method forms.
The advantage of the inventive method is to adopt supporting and protection structure that the present invention forms can replace traditional steel concrete piling wall, reinforce the active soil that slides with the method improvement of slip casting and compare, need not to adopt a large amount of reinforcing bars and concrete than traditional steel concrete piling wall and piling bar; Adopt simple grouting method, reinforcement method, the anchoring method is carried out soil body supporting, and material uses rationally, and cost is low, and the duration is fast; A mode of can change traditional soil pressure, a large amount of rigid concrete of water pressure employing propping up retaining; Adopt the grouting reinforcement improvement soil body, and can guarantee quality, can reduce cost, accelerating construction progress simultaneously in conjunction with inserting reinforcing bar.
Be elaborated below in conjunction with the job practices of accompanying drawing to building foundation pit stope support of the present invention.
Fig. 1 is the phantom drawing of the job practices of building foundation pit stope support of the present invention;
Fig. 2 is the schematic diagram of the excavation step in the expression said method.
As illustrated in fig. 1 and 2, the job practices of building foundation pit stope support of the present invention comprises the steps: promptly at first do not forming cement-earth underground continuous wall 1 in the precalculated position by the cement paddling process before the excavation pit, this wall is formed by many cement earth piles 2, before solidifying, vertically in above-mentioned cement earth pile 2, inserts cement-soil reinforcing bar 3, utilize excavator 4 to carry out foundation ditch 5 stage excavations afterwards, thereby form work plane 6 by above-mentioned diaphragm wall 1, every layer cutting depth is no more than 2 meters, along continuous straight runs and oblique direction are down carried out soil nailing and anchor pole 9 constructions on formed work plane then, form soil nailing hole and bolthole earlier, in this hole, passing through high-pressure slip-casting method reperfusion serosity afterwards, the mechanical property of the improvement cement-earth underground continuous wall soil body behind, the initiatively native C φ value of the soil body is improved, before not solidifying, insert in slurries in above-mentioned hole as the reinforcing bar 10 of soil nailing or the reinforcing bar 8 in the anchor pole, metal linked network 7 is set on above-mentioned work plane, this linked network 7 is fixed by reinforcing bar 10 ends as soil nailing of stretching out from work plane, at last sprayed mortar on above-mentioned linked network.
Claims (9)
1. the job practices of a building foundation pit stope support, its step comprises:
A) at first the supporting foundation soil body is reinforced the formation cement-earth underground continuous wall;
B) before coagulating together on the cement, in this cement-earth underground continuous wall, insert vertical elongated rigid member;
C) along above-mentioned cement-earth underground continuous wall according to desired depth stage excavation foundation ditch foundation soil body;
D) at along continuous straight runs on the work plane that forms by above-mentioned cement-earth underground continuous wall that excavates out and tiltedly to forming soil nailing hole and bolthole;
E) slip casting is carried out in above-mentioned soil nailing hole and bolthole, changed the intensity of above-mentioned hole surrounding soil;
F) thus inserting elongated rigid member in above-mentioned soil nailing hole that is perfused with slurries and bolthole forms soil nailing and anchor pole respectively;
G) on above-mentioned work plane, form protective surface.
2. method according to claim 1 is characterized in that above-mentioned elongated rigid member adopts reinforcing bar.
3. method according to claim 1 is characterized in that above-mentioned elongated rigid member adopts steel pole.
4. method according to claim 1 is characterized in that above-mentioned protective surface is by linked network at first is set on work plane, the mode of sprayed mortar forms thereon then.
5. method according to claim 4 is characterized in that above-mentioned linked network is fixed on the above-mentioned soil nailing.
6. method according to claim 1 is characterized in that above-mentioned protective surface direct injection cement grout and forming thereon.
7. method according to claim 1 is characterized in that above-mentioned maintenance face forms by artificial concrete coating.
8. method according to claim 1 is characterized in that the slurry filling of soil nailing hole and bolthole adopts the compacted slip casting method of high pressure, splits the power slip casting method, and perhaps the compaction grouting method is carried out.
9. method according to claim 1 is characterized in that above-mentioned cement-earth underground continuous wall is to adopt paddling process, the churning method, and the high-pressure slip-casting method forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112023 CN1043263C (en) | 1997-05-15 | 1997-05-15 | Construction method for building foundation pit stope support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112023 CN1043263C (en) | 1997-05-15 | 1997-05-15 | Construction method for building foundation pit stope support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1180118A CN1180118A (en) | 1998-04-29 |
| CN1043263C true CN1043263C (en) | 1999-05-05 |
Family
ID=5172027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97112023 Expired - Lifetime CN1043263C (en) | 1997-05-15 | 1997-05-15 | Construction method for building foundation pit stope support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043263C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340723C (en) * | 2005-05-23 | 2007-10-03 | 邓敬森 | Method for slope reinforcement |
| CN1333139C (en) * | 2006-04-17 | 2007-08-22 | 陈星� | Column supported underground continuous wall |
| CN101008178B (en) * | 2007-01-12 | 2010-05-19 | 中山大学 | Soft base processing construction process using excavating and stirring method |
| CN101289860B (en) * | 2008-04-10 | 2010-06-09 | 中交三航局第二工程有限公司 | Underwater slope protection construction method for foundation ditch in water |
| CN101824962B (en) * | 2010-05-11 | 2013-11-06 | 李宪奎 | Method for soil mass supporting construction by jet mixing drilling tool |
| 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 |
| CN104532855B (en) * | 2014-12-31 | 2017-03-15 | 云南建工基础工程有限责任公司 | A kind of built pile supporting construction in deep peat swamps evolution |
| CN105022925B (en) * | 2015-07-28 | 2019-03-05 | 青岛理工大学 | A kind of optimum design method of prestressed anchor composite soil nailing reinforcing side slope |
| CN110265800A (en) * | 2019-05-21 | 2019-09-20 | 中国建筑第八工程局有限公司 | Based on the earthing or grounding means and its construction method under the conditions of plate brad supporting |
| CN110424409A (en) * | 2019-08-16 | 2019-11-08 | 上海建工集团股份有限公司 | A kind of foundation pit enclosure method being adapted to high water level low clearance |
| CN111021365A (en) * | 2019-12-13 | 2020-04-17 | 中冶天工集团有限公司 | Reusable foundation pit supporting device and using method |
| CN112501968B (en) * | 2020-12-24 | 2022-03-01 | 荀敬川 | Highway subgrade reinforcing structure and construction method |
-
1997
- 1997-05-15 CN CN 97112023 patent/CN1043263C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1180118A (en) | 1998-04-29 |
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