CN201943076U - Combined foundation pit supporting structure - Google Patents

Combined foundation pit supporting structure Download PDF

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Publication number
CN201943076U
CN201943076U CN2011200130806U CN201120013080U CN201943076U CN 201943076 U CN201943076 U CN 201943076U CN 2011200130806 U CN2011200130806 U CN 2011200130806U CN 201120013080 U CN201120013080 U CN 201120013080U CN 201943076 U CN201943076 U CN 201943076U
Authority
CN
China
Prior art keywords
pile
steel sheet
construction
foundation pit
pit supporting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011200130806U
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Chinese (zh)
Inventor
方磊
李仁民
王军培
龚文宗
李青苗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southeast University
Original Assignee
Southeast University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CN2011200130806U priority Critical patent/CN201943076U/en
Application granted granted Critical
Publication of CN201943076U publication Critical patent/CN201943076U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a combined foundation pit supporting structure belonging to the technical field of geotechnical engineering. The combined foundation pit supporting structure comprises a cast-in-situ bored pile used as a supporting structure, and a steel sheet pile used as a water stopping curtain, wherein the cast-in-situ bored pile and the steel sheet pile form a space truss structure by an inner-side pile top ring beam, an outer-side pile top ring beam and inner-side and outer-side pile cap beams. The combined foundation pit supporting structure realizes the purposes of being simple and fast for construction, having easily-controlled quality, and being recycled and large in whole rigidity.

Description

A kind of combined foundation ditch support structure
Technical field
The utility model relates to a kind of combined foundation ditch support structure, belongs to the geotechnical engineering technical field.
Background technology
Pattern foundation pit supporting structure is for the safety that guarantees underground structure construction and foundation ditch surrounding enviroment a retaining of foundation pit side-wall and surrounding enviroment employing to be reinforced and safeguard measure.Foundation pit supporting construction can be selected for use according to conditions such as foundation ditch surrounding enviroment, cutting depth, engineering geology and hydrogeology, construction operation equipment and construction seasons, mainly contains bored pile+deep-mixed pile water-stop curtain, diaphragm wall, cement soil wall, the contrary combination of making arch wall, soil nailing wall or adopting above-mentioned pattern.
Wherein bored pile+deep-mixed pile water-stop curtain is the most ripe, also is the most frequently used Foundation Pit.Bored pile has the bearing capacity height, can passing through various soil property complexity or soft or hard, to change big soil layer (as the rock stratum of all kinds of cohesive soils, sand, crushed gravel soil, decomposed rock and many interlayers), construction technology ripe and to advantages such as the surrounding buildings influence are little.But bored pile has, and construction link is more, technical requirements is high, technology is complicated, construction and shortcomings such as curing time length, cost height.
Advantages such as deep-mixed pile has noiseless, friction in the native sealing dual-use function of retaining, the construction, pollution is little, soil compaction is slight.The agitation pile that is applied to the foundation ditch water-stop curtain is generally twin shaft deep-mixed pile and three deep-mixed piles, and the effective construction depth of twin shaft agitation pile generally is no more than 12 meters, three agitation piles of general employing when reinforcement depth is long.Three general pile qualities of deep-mixed pile are good than the twin shaft deep-mixed pile, but in sand, if reinforcement depth dark excessively (for example above 15 meters), pile quality and pile body verticality also are difficult to guarantee, the bottom impervious wall becomes that wall is discontinuous a jag phenomenon, stagnant water effect is bad, and construction costs is higher.
Summary of the invention
The utility model purpose provides a kind of construction simple and fast, easy to control the quality, can be recycled the combined foundation ditch support structure that integral rigidity is big.
A kind of combined foundation ditch support structure comprises that bored pile and steel sheet pile are formed space truss structure by inboard pile block collar beam, outside pile block collar beam and interior outside pile cap beam as the bored pile of supporting and protection structure with as the steel sheet pile of water-stop curtain.
Job practices based on combined foundation ditch support structure of the present utility model may further comprise the steps:
The first step: according to site condition and computational analysis, determine that the stake of bored pile is long, stake footpath, spacing and arrangement of reinforcement, determine that the stake of steel sheet pile is long;
Second step: cross section, arrangement of reinforcement and the spacing of outside pile cap beam in determining;
The 3rd step: construction drill castinplace pile;
The 4th step: the construction steel sheet pile is as water-stop curtain;
The 5th step: the inboard pile block collar beam of constructing respectively, outside pile block collar beam, interior outside pile cap beam;
The 6th step: excavation pit;
The 7th step:, build bed course, construction base plate and agent structure to clearing up, flatten in the end, foundation ditch hole;
The 8th step: backfill, outside pile cap beam, outside pile block collar beam are extracted steel sheet pile in removing.
The utility model adopts technique scheme, compared with prior art have following advantage: the utility model adopts bored pile and steel sheet pile combined support structure, can give full play to the advantage of bored pile and steel sheet pile, more reasonable more economically than other foundation pit supporting construction form.Steel sheet pile is good except stagnant water effect, goes back and bored pile composition space truss structure, and integral rigidity is big, can effectively control foundation pit deformation, reduces the pile body moment of flexure.Steel sheet pile construction simple and fast, easy to control the quality can reclaim after the construction, recycles environmental protection.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated:
As shown in Figure 1, a kind of combined foundation ditch support structure, comprise that bored pile 1 and steel sheet pile 2 are formed space truss structures by inboard pile block collar beam 3, outside pile block collar beam 4 and interior outside pile cap beam 5 as the bored pile 1 of supporting and protection structure with as the steel sheet pile 2 of water-stop curtain.Bored pile 1 of the present utility model and steel sheet pile 2 are arranged at the bottom of the face of land 6 behind the wall, the foundation ditch between 7.
Job practices based on combined foundation ditch support structure of the present utility model may further comprise the steps:
The first step: according to site condition and computational analysis, determine that the stake of bored pile 1 is long, stake footpath, spacing and arrangement of reinforcement, determine that the stake of steel sheet pile 2 is long;
Second step: cross section, arrangement of reinforcement and the spacing of outside pile cap beam 5 in determining;
The 3rd step: construction drill castinplace pile 1;
The 4th step: construction steel sheet pile 2 is as water-stop curtain;
The 5th step: the inboard pile block collar beam 3 of constructing respectively, outside pile block collar beam 4, interior outside pile cap beam 5;
The 6th step: excavation pit;
The 7th step:, build bed course, construction base plate and agent structure to clearing up, flatten in the end, foundation ditch hole;
The 8th step: backfill, outside pile cap beam 5, outside pile block collar beam 4 are extracted steel sheet pile 2 in removing.
Steel sheet pile 2 of the present utility model is that a kind of edge has linkage, and this linkage can independent assortment so that form a kind of steel structure body that keeps off soil or waterwall continuously closely.This stake have high strength, light-duty, water isolating good; Durability is strong; Repeated use capable of circulation, environment protecting is remarkable, can significantly reduce the amount of fetching earth and concrete use amount in construction, effectively protects land resources; Construction is simple, advantages such as duration shortening.
The inboard bored pile that adopts of the present utility model is as foundation pit supporting construction; The outside adopts steel sheet pile as water-stop curtain, array pitch 2~4m; Castinplace pile adopts the contact beam to be connected with steel sheet pile on the stake top.This method may further comprise the steps: (a) according to site condition and computational analysis, determine that 1 of bored pile is long, stake footpath, spacing and arrangement of reinforcement, determine that model, the stake of steel sheet pile 2 is long etc.; (b) determine in cross section, arrangement of reinforcement and the spacing of outside pile cap beam 5; (c) the construction drill castinplace pile 1; (d) construction steel sheet pile 2 is as water-stop curtain; (e) the inboard pile block collar beam 3 of construction, outside pile block collar beam 4, and the interior outside pile cap beam 5 between them; (f) excavation pit; (g) end, foundation ditch hole, cleared up, flattens, build bed course, construction base plate and agent structure; (h) backfill, outside pile cap beam 5 and outside pile block collar beam 4 in removing are extracted steel sheet pile.

Claims (1)

1. combined foundation ditch support structure, it is characterized in that: comprise as supporting and protection structure bored pile (1) and as the steel sheet pile (2) of water-stop curtain, bored pile (1) and steel sheet pile (2) are by inboard pile block collar beam (3), outside pile block collar beam (4) and interior outside pile cap beam (5) composition space truss structure.
CN2011200130806U 2011-01-17 2011-01-17 Combined foundation pit supporting structure Expired - Fee Related CN201943076U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200130806U CN201943076U (en) 2011-01-17 2011-01-17 Combined foundation pit supporting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200130806U CN201943076U (en) 2011-01-17 2011-01-17 Combined foundation pit supporting structure

Publications (1)

Publication Number Publication Date
CN201943076U true CN201943076U (en) 2011-08-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011200130806U Expired - Fee Related CN201943076U (en) 2011-01-17 2011-01-17 Combined foundation pit supporting structure

Country Status (1)

Country Link
CN (1) CN201943076U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102116030A (en) * 2011-01-17 2011-07-06 东南大学 Combined bracing structure for foundation pit and construction method thereof
CN108661056A (en) * 2018-05-22 2018-10-16 中铁六局集团有限公司工程设计院 A kind of peg board combined retaining structure and construction technology up and down

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102116030A (en) * 2011-01-17 2011-07-06 东南大学 Combined bracing structure for foundation pit and construction method thereof
CN108661056A (en) * 2018-05-22 2018-10-16 中铁六局集团有限公司工程设计院 A kind of peg board combined retaining structure and construction technology up and down
CN108661056B (en) * 2018-05-22 2020-05-22 中铁六局集团有限公司工程设计院 Pile plate up-and-down combined supporting structure and construction process

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C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110824

Termination date: 20160117