CN105133622B - A kind of closed retaining design of odd-shaped cross section support pile and its construction method - Google Patents

A kind of closed retaining design of odd-shaped cross section support pile and its construction method Download PDF

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Publication number
CN105133622B
CN105133622B CN201510538442.6A CN201510538442A CN105133622B CN 105133622 B CN105133622 B CN 105133622B CN 201510538442 A CN201510538442 A CN 201510538442A CN 105133622 B CN105133622 B CN 105133622B
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China
Prior art keywords
pile
odd
shaped
cement earth
support
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Expired - Fee Related
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CN105133622A (en
Inventor
秦会来
油新华
曹荣夏
马庆松
耿冬青
许国光
杨春英
张清林
马程昊
宋福渊
郭恒
胡贺祥
张伟
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China State Construction Engineering Corp Ltd
China Construction Baili Engineering Technology Development Co Ltd
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China State Construction Engineering Corp Ltd
China Construction Baili Engineering Technology Development Co Ltd
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Priority to CN201510538442.6A priority Critical patent/CN105133622B/en
Publication of CN105133622A publication Critical patent/CN105133622A/en
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Publication of CN105133622B publication Critical patent/CN105133622B/en
Expired - Fee Related legal-status Critical Current
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Abstract

A kind of closed retaining design of odd-shaped cross section support pile and its construction method, the system are to undertake Water And Earth Pressures by cross or T section bored concrete pile, close the space between cross or T section support pile by cement earth pile, integrates carrying and sealing.By the larger cross of bending rigidity or T section bored concrete pile as support pile, the integral rigidity of support system can be dramatically increased compared with the support pile of typical round section, reduces foundation ditch displacement, reduces construction costs.By space between cement earth pile closing support pile, without separately setting closed water-stop curtain, construction costs can be significantly decreased.In the retaining design, it is engaged by star section stake or T section stake with cement earth pile in edge of a wing position, compared with existing cast-in-place pile with round cross-sec tion is engaged cement earth pile, lap-joint is longer around flow path, and water-stagnating effect is good.Retaining design of the present invention can obtain with underground continuous wall-enclosure structure similar in supporting effect, but difficulty of construction and construction costs are relatively low.

Description

A kind of closed retaining design of odd-shaped cross section support pile and its construction method
Technical field
The present invention relates to a kind of closed foundation pit system and its construction method, particularly a kind of bending rigidity is larger Odd-shaped cross section support pile retaining design and its construction method.
Background technology
Current deep-foundation pit engineering is more based on Deformation control, and the section bending rigidity and bearing capacity of building enclosure are systems About supporting structure system supporting performance an important factor for, and influence construction costs an important factor for.Increase the anti-of building enclosure Curved rigidity can reduce the deformation of support system, be advantageous to the protection of foundation ditch surrounding enviroment, for specific support system integral rigidity Under conditions of it is required that, the increase of building enclosure bending rigidity, to reduce the setting of support anchor component, convenient construction, material, contracting are saved Casual labourer's phase etc. creates condition, so as to significantly reduce construction costs.
In current base pit engineering practice, campshed and diaphram wall are to apply more universal foundation pit enclosure form.But mesh In the practice of preceding base pit engineering, pore-forming equipment and pore-forming technique are limited by, the section of bored concrete pile is usual in campshed supporting foundation pit engineering For circle.From mechanics of materials knowledge, section material arrangement is more remote apart from section main shaft, and cross sectional moment of inertia is bigger, section Bending rigidity is bigger, and the anti-bending bearing capacity of equal conditions lower section is also higher.Obviously, under the conditions of same section material dosage, The bending rigidity that circular cross-section is obtained is limited, obvious waste of material be present using cast-in-place pile with round cross-sec tion.Conventional on-site pore-forming In bored concrete pile, for convenience of constructing, sectional reinforcement is more along circular cross-section girth uniform reinforcement, and causes part reinforcing bar from section Effectively played a role in bending resistance, cause to waste.
Simultaneously for level of ground water, area needs the base pit engineering of water proof higher, is generally set behind Row Piles Supporting Structure Single closed water seal curtain, water seal curtain are generally cement mixing method, rotary churning pile etc..Individually closed sealing curtain is set , it is necessary to be set along foundation ditch periphery integrally closed during curtain, construction costs is higher.When need higher building enclosure bending rigidity and every It is in engineering to use building enclosure of the diaphram wall as base pit engineering during water requirement more, but diaphram wall construction costs compared with It is high.
The content of the invention
It is an object of the invention to provide a kind of closed retaining design of odd-shaped cross section support pile and its construction method, to solve In base pit engineering, the cast-in-place pile with round cross-sec tion bending rigidity as soil-baffling structure is not high, the technical problem of sectional reinforcement waste etc., Also solve the defects of closed water-stop curtain construction costs is high.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of closed retaining design of odd-shaped cross section support pile, arranged along foundation ditch periphery, including alternate the one of setting Rejection tee section support pile and cement earth pile, the odd-shaped cross section support pile are deposited reinforced concrete pile, are by vertical foundation pit The web of side wall is formed with the Ying Keng sides occlusion edge of a wing of parallel foundation ditch side wall, and the odd-shaped cross section support pile is engaged by Ying Keng sides The edge of a wing termination on the edge of a wing is connected the cement earth piles of the odd-shaped cross section support pile both sides respectively, forms closed retaining design.
The cement earth pile is single-row stake or at least two row stakes for being mutually twisted connection along parallel foundation ditch side wall direction.It is described Direction of the cement earth pile along vertical foundation pit side wall is arranged to more than two rows, the edge of a wing termination on the Ying Keng sides occlusion edge of a wing near meeting Cheat row's cement earth pile overlap joint occlusion of side.
The Ying Keng sides occlusion edge of a wing forms the T-shaped odd-shaped cross section support pile in cross section with web, and the web edge is hung down The height of the cross section in straight foundation ditch side wall direction is more than the width of cross section of the web along parallel foundation ditch side wall direction.
The web is by being engaged the edge of a wing positioned at Ying Keng sides)Parallel foundation ditch side wall direction both sides leading web and trailing web Form, it is in criss-cross odd-shaped cross section support pile that the leading web, the Ying Keng sides occlusion edge of a wing and trailing web, which form cross section, described The height of cross section of the trailing web along vertical foundation pit side wall direction is more than cross section of the trailing web along parallel foundation ditch side wall direction Width.
The foundation ditch is provided with the waist rail being connected with inner support or anchor pole, the outward flange of leading web and cement earth pile it is outer Edge is concordant, and the height of trailing web is more than the height of leading web, and the height of trailing web is more than its width.
A kind of construction method of the closed retaining design of odd-shaped cross section support pile, construction procedure are as follows:
Step 1, according to the hydrogeologic condition in proposed place and excavation of foundation pit depth, carry out closed retaining design Analysis is calculated, selects the section form of odd-shaped cross section support pile, and determines the cross section geometry of odd-shaped cross section support pile, arrangement of reinforcement And stake spacing, determine the stake footpath of cement earth pile, be engaged with Ying Keng sides the edge of a wing lap width, set columns and row and Construction equipment and construction technology;
Step 2, along foundation ditch periphery surveying setting-out, identify the position of retaining design;
Step 3, in the original position of construction retaining design, the closing for the first odd-shaped cross section support pile both sides of first constructing Cement earth pile, respectively the first cement earth pile and the second cement earth pile;
Before step 4, the first cement earth pile and the second cement earth pile condense hardening, the first odd-shaped cross section support pile of constructing, And ensure that the overlap joint length of action of the Ying Keng sides occlusion edge of a wing and the cement earth pile first constructed is not less than 10cm per side;
Step 5, continue the 3rd cement earth pile of constructing along foundation ditch periphery;
Step 6, the second odd-shaped cross section support pile of being constructed between the second cement earth pile and the 3rd cement earth pile, and ensure Ying Keng sides are engaged the edge of a wing and every side overlap joint length of action of cement earth pile is not less than 10cm;
Step 7, step 5 and step 6 are repeated in, until whole closed retaining designs is completed in construction.
The first odd-shaped cross section support pile in the step 4 is constructed for two-tube heavy method of shaking, colligation odd-shaped cross section supporting first The deformed bar cage of stake, the odd-shaped cross section stake holes being adapted with odd-shaped cross section support pile of constructing secondly is needed, then by colligation Good deformed bar cage is hung in corresponding stake holes, and concrete perfusion pile.
The step 4 and step 5 are carried out simultaneously.
Compared with prior art the invention has the characteristics that and beneficial effect:
The odd-shaped cross section support pile of the present invention, the soil-baffling structure as closed retaining design.Cut first with typical round Face pattern foundation pit supporting structure bored concrete pile is compared, under the conditions of equal area of section support pile of the invention can obtain larger bending rigidity and Anti-bending bearing capacity;Compared secondly with typical round section pattern foundation pit supporting structure bored concrete pile, it is necessary to when obtaining identical section bending rigidity, The area of section or increase stake spacing of support pile of the present invention can be reduced, so as to significantly save concrete material, engineering is reduced and make Valency., can be high wide by the section for the support pile for adjusting the present invention again compared with the pattern foundation pit supporting structure bored concrete pile of typical round section Than, section edge of a wing position and size etc., the cross sectional moment of inertia for being several times as much as circular cross-section is obtained, it is hereby achieved that being several times as much as justifying stake Bending rigidity, significantly improve the bending rigidity of retaining design, reduce the deformation of support system, be advantageous to foundation ditch surrounding enviroment guarantor Shield.
The odd-shaped cross section support pile of the present invention has clearly compression and tensile region, is irrigated with typical round section pattern foundation pit supporting structure Circumferentially sectional uniform arrangement of reinforcement is compared for stake, and Reinforcement can be intensively arranged in away from section by support pile of the invention The tensile region of main shaft, the load-carrying properties of reinforcing bar and concrete material can be given full play to, section anti-bending bearing capacity be improved, so as to save About material, reduce construction costs.
The closed retaining design of odd-shaped cross section support pile proposed by the present invention is the preceding edge of a wing by odd-shaped cross section support pile The retaining design that the cement earth pile first constructed forms closing is engaged, cement earth pile shape is engaged with current existing circular section bored concrete pile Compared into closing retaining design, overlapped by edge of a wing square-section and be engaged cement earth pile, the sealing longer around flow path at occlusion Effect is more preferable, it is not necessary to separately sets closed water-stop curtain, significantly reduces construction costs.
The closed retaining design of odd-shaped cross section support pile proposed by the present invention, bar is required in same retaining design Deformation control Under part, retaining design rigidity significantly improves, and can reduce support stiffness, increases support level spacing, between increase support is vertical Away from, it might even be possible to support road number is reduced, so as to saving material, convenient construction, shortening the duration and reducing construction costs etc..
The closed retaining design of odd-shaped cross section support pile proposed by the present invention, compared with underground continuous wall-enclosure structure, into Hole is implemented by shake heavy method of double-jacket tube, and grooving and mud off without diaphram wall are easy for construction, environmentally friendly.
The closed retaining design of odd-shaped cross section support pile proposed by the present invention, can compared with underground continuous wall-enclosure structure To obtain the bearing capacity similar to diaphram wall and bending rigidity, but material usage will lack, low engineering cost.
The present invention can obtain the supporting effect similar to diaphram wall retaining design, but difficulty of construction and construction costs Below diaphram wall.
Brief description of the drawings
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the T-shaped foundation pit supporting pile of the embodiment of the present invention one.
Fig. 2 is the occlusion concrete stake foundation pit system schematic diagram for using support pile in Fig. 1.
Fig. 3 is the structural representation of the cross foundation pit supporting pile of the embodiment of the present invention two.
Fig. 4 is the occlusion concrete stake foundation pit system schematic diagram for using support pile in Fig. 3.
Reference:1- odd-shaped cross sections support pile, 1.1- webs, 1.1a- leading webs, 1.1b- trailing webs, 1.2- The Ying Keng sides occlusion edge of a wing, the first odd-shaped cross sections of 1a- support pile, the second odd-shaped cross sections of 1b- support pile, 2- cement earth piles, 2a- First cement earth pile, the cement earth piles of 2b- second, the cement earth piles of 2c- the 3rd.
Embodiment
Embodiment is referring to shown in Fig. 1-2, a kind of closed retaining design of odd-shaped cross section support pile, is arranged along foundation ditch periphery, A sides are Ying Keng sides in figure, and B sides are to meet native side.This closed retaining design of odd-shaped cross section support pile includes alternating and stinging Enclosed rejection tee section support pile 1 and cement earth pile 2, the odd-shaped cross section support pile 1 is combined into fill for armored concrete Stake is noted, undertakes Water And Earth Pressures, is to be engaged the edge of a wing 1.2 with the Ying Keng sides of parallel foundation ditch side wall by the web 1.1 of vertical foundation pit side wall Form.
The Ying Keng sides occlusion edge of a wing 1.2 forms cross section odd-shaped cross section support pile in T shape with web 1.1, described The height m of cross section of the web 1.1 along vertical foundation pit side wall direction is more than cross section of the web along parallel foundation ditch side wall direction Width n.The odd-shaped cross section support pile 1, the edge of a wing termination that the edge of a wing 1.2 is engaged by Ying Keng sides are connected the abnormity section respectively The cement earth pile 2 of the both sides of face support pile 1, forms closed retaining design.
The cement earth pile 2 can be 1 row, two row or multiple row along foundation ditch side wall direction.The present embodiment is two row.
If cement earth pile 2 is arranged to more than two rows along vertical foundation pit side wall direction, Ying Keng sides are engaged the edge of a wing end on the edge of a wing 1.2 Head is closed the overlap joint of cement earth pile 2 with the row near Ying Keng sides and is engaged.The present embodiment is two rows.
Embodiment two is referring to shown in Fig. 3-4, and unlike embodiment one, the web is to be engaged the edge of a wing by Ying Keng sides Leading web 1.1a and trailing web the 1.1b composition of 1.2 parallel foundation ditch side wall direction both sides, leading web 1.1a, Ying Keng side is stung It is in criss-cross odd-shaped cross section support pile to close the edge of a wing 1.2 and trailing web 1.1b and form cross section, and the trailing web 1.1b is along vertical The height p of the cross section in foundation ditch side wall direction is more than cross section ns ' of the trailing web 1.1b along parallel foundation ditch side wall direction width.
The foundation ditch is provided with the waist rail being connected with inner support or anchor pole, leading web 1.1a outward flange and cement earth pile 2 outward flange is concordant, and trailing web 1.1b height p is more than leading web 1.1a height q.
The construction method of the closed retaining design of odd-shaped cross section support pile of above example, construction procedure are as follows:
Step 1, according to the hydrogeologic condition in proposed place and excavation of foundation pit depth, carry out closed retaining design Calculate analysis, select the section form of section support pile, and determine the cross section geometry of odd-shaped cross section support pile, arrangement of reinforcement and Stake spacing, it is determined that the stake footpath of closing cement earth pile, the lap width for being engaged with Ying Keng sides the edge of a wing, the columns of setting and row and Construction equipment and construction technology;
Step 2, along foundation ditch periphery surveying setting-out, identify the position of retaining design;
Step 3, in the original position of construction retaining design, the water for the first odd-shaped cross section support pile 1a both sides of first constructing Soil stake, respectively the first cement earth pile 2a and the second cement earth pile 2b;
Step 4, before the first cement earth pile 2a and the second cement earth pile 2b condenses hardening, the first odd-shaped cross section of constructing Support pile 1a, and ensure that the overlap joint length of action of cement earth pile of the Ying Keng sides occlusion edge of a wing with first constructing is not less than per side 10cm;
Step 5, continue the 3rd cement earth pile 2c that constructs along foundation ditch periphery;
Step 6, before the second cement earth pile 2b and the 3rd cement earth pile 2c condenses hardening, construct the second cement earth pile 2b And the 3rd construct between cement earth pile 2c the second odd-shaped cross section support pile 2a, and ensure the Ying Keng sides occlusion edge of a wing and closing soil cement Every side overlap joint length of action of stake is not less than 10cm;
Step 7, step 5 and step 6 are repeated in, until whole closed retaining designs is completed in construction.
The first odd-shaped cross section support pile 1a in the step 4 is two-tube shake heavy method construction, first colligation odd-shaped cross section branch The deformed bar cage of fender pile, the odd-shaped cross section stake holes that construction is adapted with odd-shaped cross section support pile in foundation ditch is secondly needed, so The good steel reinforcement cage of colligation is hung in corresponding stake holes afterwards, and concrete perfusion pile.
If the situation in place allows, step 4 and step 5 can be carried out simultaneously.

Claims (4)

  1. A kind of 1. construction method of the closed retaining design of odd-shaped cross section support pile, it is characterised in that
    The closed retaining design of odd-shaped cross section support pile, arranged along foundation ditch periphery, including alternate a rejection of setting Tee section support pile(1)And cement earth pile(2), the odd-shaped cross section support pile(1)It is by vertical for deposited reinforced concrete pile The web of foundation ditch side wall(1.1)The edge of a wing is engaged with the Ying Keng sides of parallel foundation ditch side wall(1.2)Composition, the odd-shaped cross section support pile (1)The edge of a wing is engaged by Ying Keng sides(1.2)Edge of a wing termination be connected respectively the odd-shaped cross section support pile(1)The cement of both sides Native stake(2), form closed retaining design;
    The cement earth pile(2)It is single-row stake or at least two row stakes for being mutually twisted connection along parallel foundation ditch side wall direction;It is described Cement earth pile(2)It is arranged to more than two rows along the direction of vertical foundation pit side wall, the Ying Keng sides occlusion edge of a wing(1.2)Edge of a wing termination with Row's cement earth pile near Ying Keng sides(2)Overlap joint occlusion;
    Construction procedure is as follows:
    Step 1, according to the hydrogeologic condition in proposed place and excavation of foundation pit depth, carry out the calculating of closed retaining design Analysis, selects the section form of odd-shaped cross section support pile, and determine the cross section geometry of odd-shaped cross section support pile, arrangement of reinforcement and Stake spacing, determine the stake footpath of cement earth pile, lap width, the columns set and row and the construction on the edge of a wing are engaged with Ying Keng sides Equipment and construction technology;
    Step 2, along foundation ditch periphery surveying setting-out, identify the position of retaining design;
    Step 3, in the original position of construction retaining design, the first odd-shaped cross section support pile of first constructing(1a)The closing of both sides Cement earth pile, respectively the first cement earth pile(2a)With the second cement earth pile(2b);
    Step 4, the first cement earth pile(2a)With the second cement earth pile(2b)Before condensing hardening, the first odd-shaped cross section branch of constructing Fender pile(1a), and ensure that the overlap joint length of action of cement earth pile of the Ying Keng sides occlusion edge of a wing with first constructing is not less than per side 10cm, overlapped by edge of a wing square-section and be engaged cement earth pile, it is longer around flow path at occlusion;
    Step 5, continue the 3rd cement earth pile of constructing along foundation ditch periphery(2c);
    Step 6, in the second cement earth pile(2b)With the 3rd cement earth pile(2c)Between construct the second odd-shaped cross section support pile (2a), and ensure that every side overlap joint length of action of the Ying Keng sides occlusion edge of a wing and cement earth pile is not less than 10cm;
    Step 7, step 5 and step 6 are repeated in, until whole closed retaining designs is completed in construction;
    The first odd-shaped cross section support pile in the step 4(1a)For two-tube heavy method construction of shaking, first colligation odd-shaped cross section supporting The deformed bar cage of stake, the odd-shaped cross section stake holes being adapted with odd-shaped cross section support pile of constructing secondly is needed, then by colligation Good deformed bar cage is hung in corresponding stake holes, and concrete perfusion pile;
    The step 4 and step 5 are carried out simultaneously.
  2. 2. the construction method of the closed retaining design of odd-shaped cross section support pile according to claim 1, it is characterised in that:Institute State the Ying Keng sides occlusion edge of a wing(1.2)With web(1.1)Form the T-shaped odd-shaped cross section support pile in cross section, the web(1.1) Height along the cross section in vertical foundation pit side wall direction is more than web(1.1)Along the width of the cross section in parallel foundation ditch side wall direction Degree.
  3. 3. the construction method of the closed retaining design of odd-shaped cross section support pile according to claim 1, it is characterised in that:Institute State web(1.1)It is by being engaged the edge of a wing positioned at Ying Keng sides(1.2)Parallel foundation ditch side wall direction both sides leading web(1.1a)With Trailing web(1.1b)Form, the leading web(1.1a), Ying Keng sides occlusion the edge of a wing(1.2)And trailing web(1.1b)Form cross section In criss-cross odd-shaped cross section support pile, the trailing web(1.1b)Height along the cross section in vertical foundation pit side wall direction is more than Trailing web(1.1b)Along the width of the cross section in parallel foundation ditch side wall direction.
  4. 4. the construction method of the closed retaining design of odd-shaped cross section support pile according to claim 3, it is characterised in that:Institute State foundation ditch and be provided with the waist rail being connected with inner support or anchor pole, leading web(1.1a)Outward flange and cement earth pile(2)It is outer Edge is concordant, trailing web(1.1b)Height be more than leading web(1.1a)Height, trailing web(1.1b)Height to be more than its wide Degree.
CN201510538442.6A 2015-08-28 2015-08-28 A kind of closed retaining design of odd-shaped cross section support pile and its construction method Expired - Fee Related CN105133622B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101014796B1 (en) * 2008-03-03 2011-02-15 주식회사 한빛구조엔지니어링 Top-down underground construction method using prefabricated concrete column member as temporary bridge column
CN102776880A (en) * 2012-08-24 2012-11-14 占昌成 Prefabricated concrete irregular-shaped pile
CN103174169A (en) * 2011-12-21 2013-06-26 温州长城基础工程公司 Cast-in-place H-shaped reinforced concrete and cement soil alternative underground continuous wall and construction method thereof
CN203904972U (en) * 2014-04-22 2014-10-29 杨众 Anti-soil leaking combined support pile
CN104563130A (en) * 2015-01-14 2015-04-29 济南轨道交通集团有限公司 Cross-shaped enclosure pile and construction method capable of using a structure as enclosure structure and main body structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101014796B1 (en) * 2008-03-03 2011-02-15 주식회사 한빛구조엔지니어링 Top-down underground construction method using prefabricated concrete column member as temporary bridge column
CN103174169A (en) * 2011-12-21 2013-06-26 温州长城基础工程公司 Cast-in-place H-shaped reinforced concrete and cement soil alternative underground continuous wall and construction method thereof
CN102776880A (en) * 2012-08-24 2012-11-14 占昌成 Prefabricated concrete irregular-shaped pile
CN203904972U (en) * 2014-04-22 2014-10-29 杨众 Anti-soil leaking combined support pile
CN104563130A (en) * 2015-01-14 2015-04-29 济南轨道交通集团有限公司 Cross-shaped enclosure pile and construction method capable of using a structure as enclosure structure and main body structure

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