CN102839672B - A kind of foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting - Google Patents

A kind of foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting Download PDF

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Publication number
CN102839672B
CN102839672B CN201210348448.3A CN201210348448A CN102839672B CN 102839672 B CN102839672 B CN 102839672B CN 201210348448 A CN201210348448 A CN 201210348448A CN 102839672 B CN102839672 B CN 102839672B
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pile
shaped steel
steel
cement mixing
displacement
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CN102839672A (en
Inventor
丁昌银
陈慕贞
周毅鹏
何炳泉
詹劲
柯德辉
赵海涛
梁朝柱
梁广勇
刘家杰
何登甲
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GUANGZHOU JISHI CONSTRUCTION GROUP Co.,Ltd.
Guangzhou Institute of Building Science Co Ltd
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GUANGZHOU MACHINE FACILITIES CONSTRUCTION GROUP CO Ltd
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Abstract

The invention discloses a kind of foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting, it comprises the following steps: a, at the bottom of foundation ditch, pile up sand hill near agitation pile place, makes that sand hill is counter pushes up the side of agitation pile towards foundation ditch; B, the groove build grade beam of turning up the soil from agitation pile a distance at the bottom of foundation ditch, described sand hill is between this grade beam and described agitation pile; C, open transverse concave groove at agitation pile close to the position at its top, and fix the first shaped steel in described groove; Fix diagonal supporting member between grade beam at the bottom of d, the first shaped steel in described agitation pile groove and described foundation ditch to support; E, remove sand hill and proceed subsequent construction.Diagonal supporting member adopts this method to be used for preventing the displacement of cement mixing pile supporting and protection structure from transfiniting, construction costs cost is low, duration is short, and the diagonal supporting member used due to the method does not need to run through the adjacent underground space etc., does not therefore also worry to work the mischief to side building foundation pile.

Description

A kind of foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting
Technical field
The invention belongs to construction foundation working field, be specifically related to a kind of foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting.
Background technology
At building engineering field, in the construction to floor basement, need to adopt cement mixing pile, in excavation of foundation pit, supporting hole wall.But, during excavation of foundation pit and basement construction, the displacement of cement mixing pile possibility occurred level, when horizontal movement exceedes certain threshold values, foundation ditch there will be dangerous situation, therefore, need to control the horizontal movement of cement mixing pile, prevent cement mixing pile displacement from transfiniting.
In prior art, usually adopt prestress anchorage cable drawknot on the top of agitation pile, namely squeeze into anchor cable facing to agitation pile level and be in the milk, after reaching certain length of time, anchor cable and institute bes in the milk and form stretch-draw, thus stablizing of enhancing foundation ditch, prevent cement mixing pile displacement from transfiniting.But, the cost of prestressed anchor is cheap, and squeezes into anchor cable at agitation pile and need the longer length of time could stretch-draw after grouting, and in order to reach enough anchorage lengths, anchor cable length likely gets to side building foundation pile, damages the foundation pile of side building.
Summary of the invention
For the prestress anchorage cable drawknot that overcomes prior art is with the shortcomings and deficiencies of the method preventing cement mixing pile displacement and transfinite, technical problem to be solved by this invention is to provide that a kind of cost is low, the duration is short, can not cause the dangerous foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting to side building foundation pile.
For achieving the above object, the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting of the present invention, comprises the following steps:
A, at the bottom of foundation ditch, pile up sand hill near agitation pile place, make that sand hill is counter pushes up the side of agitation pile towards foundation ditch;
B, the groove build grade beam of turning up the soil from agitation pile a distance at the bottom of foundation ditch, described sand hill is between this grade beam and described agitation pile;
C, open transverse concave groove at agitation pile close to the position at its top, and fix the first shaped steel in described groove;
Arrange diagonal supporting member between grade beam at the bottom of d, the first shaped steel in described agitation pile groove and described foundation ditch to support;
E, remove sand hill and proceed subsequent construction.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, described first shaped steel is channel-section steel or i iron or angle steel.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, between the grade beam bottom first shaped steel and described foundation ditch of described agitation pile groove, be fixedly installed the second shaped steel support as diagonal supporting member, described second shaped steel is channel-section steel or i iron or angle steel or round steel.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, the 3rd shaped steel is established in described grade beam middle part, 3rd shaped steel is channel-section steel or i iron or angle steel, 3rd shaped steel is vertically fixed and is protruded from described grade beam top, and described second shaped steel is by be connected with described 3rd shaped steel thus one end is fixed on described grade beam.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, described second shaped steel head and the tail two ends respectively with described first shaped steel and described 3rd shaped steel at contact position by being welded and fixed.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, in stepb, after first described 3rd shaped steel being vertically weighed into described geosyncline, then carrying out concreting and forms grade beam.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, during concreting, first the bottom surface of described geosyncline is cleaned out, adopt vibrating spear to shake closely knit, adopt fast slotting slow formulation during vibrating spear construction, and check concrete thickness at any time, wipe one's face in certain hour after vibrating, after pouring concrete is complete, adopts water seasoning, keep moistening.
The improvement of the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as the present invention, described first shaped steel is fixed on the transverse concave groove place of described cement mixing pile in the mode that expansion bolt connects.
Adopt the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting of the present invention, can carry out stablizing to cement mixing pile and firmly support, effectively prevent cement mixing pile horizontal movement from transfiniting, compared to the method for the prestress anchorage cable drawknot support system of prior art, construction costs cost significantly reduces, and the duration shortens greatly, the diagonal supporting member used due to the method does not need to destroy contiguous underground rock-soil layer or contiguous space, does not therefore just worry to work the mischief to side building foundation pile yet.
Accompanying drawing explanation
Fig. 1 be the present invention prevent the displacement of soft base cement mixing pile from transfiniting foundation pit supporting method embodiment in pile up the anti-cross-sectional configuration schematic diagram pushing up agitation pile of sand hill.
Fig. 2 be the present invention prevent the displacement of soft base cement mixing pile from transfiniting foundation pit supporting method embodiment in complete the foundation ditch partial cross section structural representation after bearing diagonal system.
Detailed description of the invention
Below with reference to the accompanying drawings the preferred embodiments of the present invention are described.The embodiment of the foundation pit supporting method that the present invention prevents the displacement of soft base cement mixing pile from transfiniting specifically comprises the following steps:
A, at the bottom of foundation ditch, pile up sand hill 1 near agitation pile place, make sand hill 1 anti-top agitation pile 2 towards the side (as Fig. 1) of foundation ditch;
B, the groove build grade beam 3 of turning up the soil from agitation pile 2 a distance at the bottom of foundation ditch, general distance agitation pile about seven meters place in construction, sand hill 1 is between grade beam 3 and agitation pile 2;
C, open transverse concave groove at agitation pile 2 close to the position at its top, and fix the first shaped steel 21 in a groove, the first shaped steel is 18a channel-section steel in the present embodiment, also can be i iron or angle steel;
Fixing the second shaped steel 4 between grade beam 3 at the bottom of d, the first shaped steel 21 in agitation pile groove 2 and foundation ditch to support as diagonal supporting member, is 16a channel-section steel in the present embodiment, also can be i iron or angle steel or round steel;
E, remove sand hill and proceed subsequent construction (see figure 2).
In addition, in grade beam 3 middle part, the 3rd shaped steel 21 is set, it is 16a channel-section steel in this embodiment, also can be i iron or angle steel, 3rd shaped steel 21 is vertically fixed and is given prominence to grade beam face and is about 50cm, second shaped steel 4 is by being connected with the 3rd shaped steel 31 thus being fixed on grade beam 3, and the second shaped steel 4 and the 3rd shaped steel 31 and the first shaped steel 21 are welded and fixed at the equal full weld of contact position.Second shaped steel also welds drawknot, to strengthen the resistance to overturning of the second shaped steel with 10-12a channel-section steel.
In stepb, during construction grade beam, after first described 3rd shaped steel being vertically weighed into described geosyncline, then concreting formation grade beam is carried out to geosyncline.During concreting, first the bottom surface of geosyncline is cleaned out, adopt vibrating spear to shake closely knit, adopt fast slotting slow formulation during vibrating spear construction, and check concrete thickness at any time, wipe one's face in certain hour after vibrating, after pouring concrete is complete, adopts water seasoning, keep moistening.
Fixing for the first shaped steel 21 and agitation pile transverse concave groove, this embodiment is the mode connected by expansion bolt, can be that M12 draws explosion bolt or chemical bolt.First bored a hole by the channel-section steel as the first shaped steel 21, the upper and lower offset in each hole, work progress, first fixes this this channel-section steel using steel pipe as temporary support mechanism, then holes on agitation pile according to the punch position on channel-section steel, squeeze into expansion bolt.
As seen from the above-described embodiment, adopt the technical scheme of the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting of the present invention, the bearing diagonal system that grade beam forms in conjunction with the shaped steel of bearing diagonal can carry out stablely firmly supporting to agitation pile, effectively prevent cement mixing pile horizontal movement from transfiniting, compared to the method for the prestress anchorage cable drawknot support system of prior art, do not need to squeeze into anchor cable to agitation pile, therefore do not worry whether getting to side building foundation pile and it is damaged, do not need to fill with concrete grout in agitation pile yet, therefore do not need to wait for the longer length of time, duration is shortened greatly.And in the foundation pit supporting method technical scheme preventing the displacement of soft base cement mixing pile from transfiniting of this invention, do not use the prestressed anchor involved great expense, construction costs cost reduces greatly.
To basement floor and sidewall construction period, the waterproof of channel-section steel and sidewall locations be considered, can at channel-section steel both sides welding steel plate for sealing water.Sidewall concreting completes and after reaching the length of time, when needing outer wall waterproof, does support between agitation pile and basement with channel-section steel, then do waterproof construction after shearing original diagonal brace channel-section steel.
Grade beam construction, as the 3rd shaped steel channel-section steel install and channel-section steel be welded and fixed time by following construction technology.
During construction grade beam, first excavate a geosyncline, size is about B × H=600 × 600mm, builds C15 concrete cushion, and join 4 Φ 18,4 Φ 16 reinforcing bars in grade beam, stirrup is Φ 8 200, with C25 concreting.Soil excavation manually carries out to coordinate with small-sized hook machine, and retreat and cut the earth, earth excavation transports out of with earthwork transportation car.Reinforcing bar binding process, reinforcing bar is pressed construction plan and is formulated position, and by specification, use position, numbering is piled up neat.Reinforcing bar external surface is if any getting rusty, and removed clean before colligation, the reinforcing bar of corrosion Eroded section must not use.Steel bar meter is installed and is performed by designing requirement and associated construction specification (or code) requirement, and beam steel cage is direct fabrication and installation on bed course.During pouring concrete, bottom surface should be cleaned out, adopt vibrating spear to shake closely knit, adopt fast slotting slow formulation during vibrating spear construction, and check concrete thickness at any time, within after vibrating 1 hour, wipe one's face; For preventing honeycomb, pitted skin, after pouring concrete is complete, adopts water seasoning, keeping moistening.
For being used as the channel-section steel of the 3rd shaped steel, when being weighed into grade beam, first steel sheet pile being sling in place with crane, allowing it bury with deadweight, hold up after stablizing, then clamp channel-section steel with crane vibrating hammer of slinging, get to the degree of depth of requirement.In work progress, for ensureing the verticality of channel-section steel, controlled in both direction with two transits.
Each channel-section steel used in the present invention, when welding, with telpher coordinative construction, after temporary fixed, first welds agitation pile position, then welding bottom channel-section steel, and the necessary evenly welding of weld seam, forbids after having welded using water for cooling.
The preferred embodiment that the above disclosed the present invention of being only prevents the side that the displacement of cement mixing pile supporting and protection structure is transfinited from sending out, certainly the interest field of the present invention can not be limited with this, therefore with the equivalent variations that the present patent application the scope of the claims is done, the scope that the present invention is contained still is belonged to.

Claims (6)

1. the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting, specifically comprises the following steps:
A, at the bottom of foundation ditch, pile up sand hill near agitation pile place, make that sand hill is counter pushes up the side of agitation pile towards foundation ditch;
B, groove of turning up the soil from agitation pile a distance at the bottom of foundation ditch, utilize the 3rd shaped steel to be vertically pressed into described ground trench bottom certain depth
After, carry out concreting and form grade beam, described sand hill is between this grade beam and described agitation pile;
C, open transverse concave groove at agitation pile close to the position at its top, and fix the first shaped steel in described groove;
Be fixedly installed the second shaped steel between d, the first shaped steel in described agitation pile groove and the 3rd shaped steel on described grade beam to support as diagonal supporting member;
E, remove sand hill and proceed subsequent construction;
Wherein, described 3rd shaped steel is arranged on described grade beam middle part, 3rd shaped steel is channel-section steel or i iron or angle steel, and the 3rd shaped steel is vertically fixed and protruded from described grade beam top, and described second shaped steel is by be connected with described 3rd shaped steel thus one end is fixed on described grade beam.
2. the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as claimed in claim 1, is characterized in that: described first shaped steel is channel-section steel or i iron or angle steel.
3. the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as claimed in claim 1, is characterized in that: described second shaped steel is channel-section steel or i iron or angle steel or round steel.
4. the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as claimed in claim 3, is characterized in that: described second shaped steel head and the tail two ends respectively with described first shaped steel and described 3rd shaped steel at contact position by being welded and fixed.
5. prevent the foundation pit supporting method that the displacement of soft base cement mixing pile is transfinited as claimed in claim 4, it is characterized in that: during concreting, first the bottom surface of described geosyncline is cleaned out, adopt vibrating spear to shake closely knit, adopt fast slotting slow formulation during vibrating spear construction, and check concrete thickness at any time, wipe one's face in certain hour after vibrating, after pouring concrete is complete, adopts water seasoning, keep moistening.
6. the foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting as claimed in claim 1, is characterized in that: described first shaped steel is fixed on the transverse concave groove place of described cement mixing pile in the mode that expansion bolt connects.
CN201210348448.3A 2012-09-19 2012-09-19 A kind of foundation pit supporting method preventing the displacement of soft base cement mixing pile from transfiniting Active CN102839672B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105421468A (en) * 2015-11-24 2016-03-23 叶长青 Basement support without concrete diagonal brace

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103114595A (en) * 2013-01-06 2013-05-22 厦门源昌城建集团有限公司 Support method and device of support pile preformed core-soil double-buttress inclined inner-strut foundation ditch
CN103290847A (en) * 2013-06-18 2013-09-11 福建省九龙建设集团有限公司 Inner oblique beam supporting structure for oversized-area deep foundation pit and construction method
CN103306291B (en) * 2013-07-01 2016-04-20 合肥建工集团有限公司 Oblique pull concrete pile solid protection wide-angle abrupt slope device
CN103410155B (en) * 2013-08-28 2016-04-06 上海岩土工程勘察设计研究院有限公司 A kind of recyclable preposition assembling braced cuts structure and application process thereof
CN107542088A (en) * 2016-06-24 2018-01-05 中国二十冶集团有限公司 A kind of end-bearing pile matches somebody with somebody piling method
CN109989404B (en) * 2017-12-30 2020-12-18 广州协安建设工程有限公司 Cement mixing pile wall foundation pit reinforcing construction method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241326A (en) * 1998-02-24 1999-09-07 Kumagai Gumi Co Ltd Slope repairing construction method for lake/marsh shore
CN2647920Y (en) * 2003-07-23 2004-10-13 顺德市永基建筑基础有限公司 Diagonal post supporting ground hole for construction
CN101892667A (en) * 2010-07-23 2010-11-24 中国建筑第二工程局有限公司 Foundation pit support device and construction method
CN102425172A (en) * 2011-12-05 2012-04-25 中冶天工集团有限公司 Support method for excavating deep foundation pit closely adjacent to high-rise building

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241326A (en) * 1998-02-24 1999-09-07 Kumagai Gumi Co Ltd Slope repairing construction method for lake/marsh shore
CN2647920Y (en) * 2003-07-23 2004-10-13 顺德市永基建筑基础有限公司 Diagonal post supporting ground hole for construction
CN101892667A (en) * 2010-07-23 2010-11-24 中国建筑第二工程局有限公司 Foundation pit support device and construction method
CN102425172A (en) * 2011-12-05 2012-04-25 中冶天工集团有限公司 Support method for excavating deep foundation pit closely adjacent to high-rise building

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"盆式开挖+中心岛支撑"基坑在滨海新区的应用;宫喜庆等;《岩土工程学报》;20081031;第30卷;第603-607页 *
傅刚辉等.2.5.2基坑支护工程现场事故应急措施.《建筑施工技术方案设计》.中央广播电视大学出版社,2011,第30页. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105421468A (en) * 2015-11-24 2016-03-23 叶长青 Basement support without concrete diagonal brace

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Effective date of registration: 20201217

Address after: 510115, No. two, No. 28, South Embankment, Yuexiu District, Guangdong, Guangzhou

Patentee after: GUANGZHOU JISHI CONSTRUCTION GROUP Co.,Ltd.

Patentee after: GUANGZHOU INSTITUTE OF BUILDING SCIENCE Co.,Ltd.

Address before: 510115, No. two, No. 28, South Embankment, Yuexiu District, Guangdong, Guangzhou

Patentee before: GUANGZHOU JISHI CONSTRUCTION GROUP Co.,Ltd.