CN105133622A - Closed enclosure system comprising supporting piles with specially-shaped sections and construction method thereof - Google Patents
Closed enclosure system comprising supporting piles with specially-shaped sections and construction method thereof Download PDFInfo
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- CN105133622A CN105133622A CN201510538442.6A CN201510538442A CN105133622A CN 105133622 A CN105133622 A CN 105133622A CN 201510538442 A CN201510538442 A CN 201510538442A CN 105133622 A CN105133622 A CN 105133622A
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Abstract
The invention discloses a closed enclosure system comprising supporting piles with specially-shaped sections and a construction method thereof. According to the system, a water-soil pressure is born by cast-in-place piles with cross-shaped or T-shaped sections, a space among the supporting piles with the cross-shaped or T-shaped sections is closed by cement-soil piles, and bearing and water stopping are integrated; the cast-in-place piles with the cross-shaped or T-shaped sections and high flexural rigidities are used as the supporting piles, and compared with the traditional supporting piles with circular sections, the overall rigidity of a supporting system can be remarkably increased, the displacement of a foundation pit can be reduced, and the engineering cost can be decreased; the space among the supporting piles is closed by the cement-soil piles, and a closed water-stopping curtain does not need to be additionally arranged, so that the engineering cost can be remarkably decreased; in the enclosure system, the piles with the cross-shaped sections or the piles with the T-shaped sections are engaged with the cement-soil piles at flanges, and compared with the engagement between the existing cast-in-place piles with circular sections and cement-soil piles, each lap-joint part has a long rounded flowing path and a good water-stopping effect; and the enclosure system disclosed by the invention is capable of obtaining a supporting effect which is similar to the supporting effect of an underground diaphragm wall enclosure structure, and low in construction difficulty and engineering cost.
Description
Technical field
The present invention relates to the larger odd-shaped cross section soldier pile retaining design of a kind of closed foundation pit system and construction method thereof, particularly a kind of bending rigidity and construction method thereof.
Background technology
Current deep-foundation pit engineering is main mainly with Deformation control, and the cross section bending rigidity of space enclosing structure and supporting capacity are the key factors of restriction supporting structure system supporting performance, are also the key factors affecting construction costs.The bending rigidity increasing space enclosing structure can reduce the distortion of support system; be conducive to the protection of foundation ditch surrounding enviroment; for under the condition that specific support system integral rigidity requires; the increase of space enclosing structure bending rigidity; for reducing the setting of support anchor component, convenient construction, save material; reductions of erection time etc. create condition, thus significantly can reduce construction costs.
In current base pit engineering practice, comparatively general bracing of foundation pit form applied by campshed and diaphragm wall.But in base pit engineering practice at present, be limited by pore-forming equipment and pore-forming technique, in campshed supporting foundation pit engineering, the cross section of castinplace pile is generally circular.From mechanics of materials knowledge, section material arranges that distance cross section main shaft is far away, and second moment of area is larger, and the bending rigidity in cross section is larger, and the anti-bending bearing capacity of equal conditions lower section is also higher.Obviously, under same section material consumption condition, the bending rigidity that circular cross-section obtains is limited, uses cast-in-place pile with round cross-sec tion to there is obvious waste of material.In conventional on-site pore-creating filling pile, for convenience of construction, sectional reinforcement is many along circular cross-section girth uniform reinforcement, and part reinforcing bar effectively can not be played a role in the bending resistance of cross section, causes waste.
Need the base pit engineering of water proof in district higher for groundwater table, after Row Piles Supporting Structure, usually arrange independent closed water seal curtain, water seal curtain is generally cement mixing method, rotary churning pile etc. simultaneously.When arranging independent closed water-stop curtain, need to arrange along the peripheral integrally closed of foundation ditch, construction costs is higher.When needing higher space enclosing structure bending rigidity and water proof requires, in engineering, the diaphragm wall that adopts as the space enclosing structure of base pit engineering more, but diaphragm wall construction costs is higher.
Summary of the invention
The object of this invention is to provide the closed retaining design of a kind of odd-shaped cross section soldier pile and construction method thereof, solve in base pit engineering, 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 solves the defects such as closed water-stop curtain construction costs is high.
For achieving the above object, the present invention adopts following technical scheme:
The closed retaining design of a kind of odd-shaped cross section soldier pile, along foundation ditch periphery, comprise rejection tee section soldier pile and the cement earth pile that interval is arranged alternately, described odd-shaped cross section soldier pile is deposited reinforced concrete pile, be made up of with the occlusion edge of a wing, Ying Keng side of parallel foundation ditch limit wall the web of vertical foundation pit limit wall, described odd-shaped cross section soldier pile is connected respectively by the termination, the edge of a wing on the occlusion edge of a wing, Ying Keng side the cement earth pile of these odd-shaped cross section soldier pile both sides, forms closed retaining design.
At least two row stakes that described cement earth pile is single-row stake along parallel foundation ditch Bian Bi direction or is mutually connected.Described cement earth pile is set to more than two rows along the direction of vertical foundation pit limit wall, the termination, the edge of a wing on the occlusion edge of a wing, Ying Keng side with arrange cement earth pile near one of Ying Keng side and overlap and be engaged.
The occlusion edge of a wing, described Ying Keng side and web form the T-shaped odd-shaped cross section soldier pile of cross section, and described web is greater than the width of web along the cross section in parallel foundation ditch Bian Bi direction along the height of the cross section in vertical foundation pit Bian Bi direction.
Described web is by being positioned at the occlusion edge of a wing, Ying Keng side) the leading web of both sides, parallel foundation ditch Bian Bi direction and trailing web form, it is criss-cross odd-shaped cross section soldier pile that described leading web, the occlusion edge of a wing, Ying Keng side and trailing web form cross section, and described trailing web is greater than the width of trailing web along the cross section in parallel foundation ditch Bian Bi direction along the height of the cross section in vertical foundation pit Bian Bi direction.
Described foundation ditch is provided with the waist rail be connected with inner support or anchor pole, and the outward flange of leading web is concordant with the outward flange of cement earth pile, and the height of trailing web is greater than the height of leading web, and the height of trailing web is greater than its width.
A construction method for the closed retaining design of odd-shaped cross section soldier pile, construction sequence is as follows:
Step one, according to hydrogeological conditions and the excavation of foundation pit degree of depth of planning to build place, carry out the computational analysis of closed retaining design, select the section form of odd-shaped cross section soldier pile, and determine the cross section geometry of odd-shaped cross section soldier pile, arrangement of reinforcement and pile spacing, determine the stake footpath of cement earth pile, be engaged the lap width on the edge of a wing, the columns of setting and row and construction equipment and construction technology with Ying Keng side;
Step 2, along foundation ditch periphery surveying setting-out, identifies the position of retaining design;
Step 3, in the original position of construction retaining design, the closed cement earth pile of the first odd-shaped cross section soldier pile both sides of first constructing, is respectively the first cement earth pile and the second cement earth pile;
Step 4, before the first cement earth pile and the second cement earth pile setting and harden, the first odd-shaped cross section soldier pile of constructing, and ensure that the occlusion edge of a wing, Ying Keng side is all not less than 10cm with the every side of overlap joint length of action of the cement earth pile of first constructing;
Step 5, continues construction the 3rd cement earth pile along foundation ditch periphery;
Step 6, the second odd-shaped cross section soldier pile of constructing between the second cement earth pile and the 3rd cement earth pile, and ensure that every side of the occlusion edge of a wing, Ying Keng side and cement earth pile overlaps length of action and is all not less than 10cm;
Step 7, repeats step 5 and step 6, successively until whole closed retaining design of having constructed.
The first odd-shaped cross section soldier pile in described step 4 is two-tube heavy method construction of shaking, first the deformed bar cage of colligation odd-shaped cross section soldier pile, secondly the odd-shaped cross section stake holes that construction and odd-shaped cross section soldier pile adapt is needed, then deformed bar cage good for colligation is hung in corresponding stake holes, and concrete perfusion pile.
Described step 4 and step 5 are carried out simultaneously.
Compared with prior art the present invention has following characteristics and beneficial effect:
Odd-shaped cross section soldier pile of the present invention, as the soil-baffling structure of closed retaining design.First, compared with traditional round tee section pattern foundation pit supporting structure castinplace pile, under equal section area condition, soldier pile of the present invention can obtain larger bending rigidity and anti-bending bearing capacity; Secondly, compared with traditional round tee section pattern foundation pit supporting structure castinplace pile, when needing to obtain identical cross section bending rigidity, the section area of soldier pile of the present invention can be reduced or increase pile spacing, thus significantly saving concrete material, reducing construction costs.Again compared with traditional round tee section pattern foundation pit supporting structure castinplace pile; can by the cross section depth-width ratio of adjustment soldier pile of the present invention, position, the edge of a wing, cross section and size etc.; obtain the second moment of area being several times as much as circular cross-section; thus the bending rigidity being several times as much as round stake can be obtained; significantly improve the bending rigidity of retaining design; reduce the distortion of support system, be conducive to the protection of foundation ditch surrounding enviroment.
Odd-shaped cross section soldier pile of the present invention has clear and definite pressurized and tensile region, compared with traditional round tee section pattern foundation pit supporting structure castinplace pile circumferentially sectional uniform arrangement of reinforcement, Reinforcement all intensively can be arranged in the tensile region away from cross section main shaft by soldier pile of the present invention, the load-carrying properties of reinforcing bar and concrete material can be given full play to, improve cross section anti-bending bearing capacity, thus saving material, reduce construction costs.
The closed retaining design of odd-shaped cross section soldier pile that the present invention proposes is engaged the cement earth pile of first constructing by the front edge of a wing of odd-shaped cross section soldier pile to form the retaining design closed, being engaged cement earth pile with current existing circular section castinplace pile is formed compared with closed retaining design, by square-section, edge of a wing overlap joint occlusion cement earth pile, occlusion place to stream path longer, stagnant water effect is better, do not need separately to establish closed water-stop curtain, significantly reduce construction costs.
The closed retaining design of odd-shaped cross section soldier pile that the present invention proposes, under same retaining design Deformation control requirement condition, significantly improving of retaining design rigidity, support stiffness can be reduced, increase support level spacing, increase and support vertical spacing, even can reduce support number of channels, thus material, convenient construction, reduction of erection time can be saved and reduce construction costs etc.
The present invention propose the closed retaining design of odd-shaped cross section soldier pile, compared with underground continuous wall-enclosure structure, pore-forming by double-jacket tube shake heavy method implement, without the need to grooving and the mud off of diaphragm wall, easy construction, environmental protection.
The closed retaining design of odd-shaped cross section soldier pile that the present invention proposes, compared with underground continuous wall-enclosure structure, can obtain the bearing capacity similar to diaphragm wall and bending rigidity, but material usage will lack, construction costs is low.
The present invention can obtain the supporting effect similar to diaphragm wall retaining design, but difficulty of construction and construction costs are all lower than diaphragm wall.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
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 using soldier 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 using soldier pile in Fig. 3.
Reference numeral: 1-odd-shaped cross section soldier pile, 1.1-web, 1.1a-leading web, 1.1b-trailing web, the occlusion edge of a wing, 1.2-Ying Keng side, 1a-first odd-shaped cross section soldier pile, 1b-second odd-shaped cross section soldier pile, 2-cement earth pile, 2a-first cement earth pile, 2b-second cement earth pile, 2c-the 3rd cement earth pile.
Detailed description of the invention
Embodiment is see shown in Fig. 1-2, and the closed retaining design of a kind of odd-shaped cross section soldier pile, along foundation ditch periphery, in figure, A side is Ying Keng side, and B side is for meeting native side.The closed retaining design of this odd-shaped cross section soldier pile comprises interval and replaces and be engaged as enclosed rejection tee section soldier pile 1 and a cement earth pile 2, described odd-shaped cross section soldier pile 1 is deposited reinforced concrete pile, bearing Water And Earth Pressures, is be made up of the occlusion edge of a wing, Ying Keng side 1.2 of the web 1.1 of vertical foundation pit limit wall with parallel foundation ditch limit wall.
The occlusion edge of a wing, described Ying Keng side 1.2 and web 1.1 form cross section odd-shaped cross section soldier pile in T shape, and described web 1.1 is greater than the width n of web along the cross section in parallel foundation ditch Bian Bi direction along the height m of the cross section in vertical foundation pit Bian Bi direction.Described odd-shaped cross section soldier pile 1, the cement earth pile 2 of these odd-shaped cross section soldier pile 1 both sides that are connected respectively by the termination, the edge of a wing on the occlusion edge of a wing, Ying Keng side 1.2, forms closed retaining design.
Described cement earth pile 2 can be 1 row, two row or multiple rows along foundation ditch Bian Bi direction.The present embodiment is two row.
If cement earth pile 2 is set to more than two rows along vertical foundation pit Bian Bi direction, the termination, the edge of a wing on the occlusion edge of a wing, Ying Keng side 1.2 is closed cement earth pile 2 and is overlapped and be engaged with arranging near one of Ying Keng side.The present embodiment is two rows.
Embodiment two is see shown in Fig. 3-4, with in embodiment one unlike, described web is made up of the leading web 1.1a of the both sides, parallel foundation ditch Bian Bi direction on the occlusion edge of a wing, Ying Keng side 1.2 and trailing web 1.1b, it is criss-cross odd-shaped cross section soldier pile that the occlusion edge of a wing, described leading web 1.1a, Ying Keng side 1.2 and trailing web 1.1b form cross section, and described trailing web 1.1b is greater than the width of trailing web 1.1b along the cross section n ' in parallel foundation ditch Bian Bi direction along the height p of the cross section in vertical foundation pit Bian Bi direction.
Described foundation ditch is provided with the waist rail be connected with inner support or anchor pole, and the outward flange of leading web 1.1a is concordant with the outward flange of cement earth pile 2, and the height p of trailing web 1.1b is greater than the height q of leading web 1.1a.
The construction method of the closed retaining design of odd-shaped cross section soldier pile of above embodiment, construction sequence is as follows:
Step one, according to hydrogeological conditions and the excavation of foundation pit degree of depth of planning to build place, carry out the computational analysis of closed retaining design, select the section form of cross section soldier pile, and determine the cross section geometry of odd-shaped cross section soldier pile, arrangement of reinforcement and pile spacing, determine the stake footpath of closed cement earth pile, be engaged the lap width on the edge of a wing, the columns of setting and row and construction equipment and construction technology with Ying Keng side;
Step 2, along foundation ditch periphery surveying setting-out, identifies the position of retaining design;
Step 3, in the original position of construction retaining design, the cement earth pile of the first odd-shaped cross section soldier pile 1a both sides of first constructing, is 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 setting and harden, construct the first odd-shaped cross section soldier pile 1a, and ensure that the occlusion edge of a wing, Ying Keng side is all not less than 10cm with the every side of overlap joint length of action of the cement earth pile of first constructing;
Step 5, continues construction the 3rd cement earth pile 2c along foundation ditch periphery;
Step 6, before the second cement earth pile 2b and the 3rd cement earth pile 2c setting and harden, construct the second odd-shaped cross section soldier pile 2a that to construct between the second cement earth pile 2b and the 3rd cement earth pile 2c, and ensure that every side of the occlusion edge of a wing, Ying Keng side and closed cement earth pile overlaps length of action and is all not less than 10cm;
Step 7, repeats step 5 and step 6, successively until whole closed retaining design of having constructed.
The first odd-shaped cross section soldier pile 1a in described step 4 is two-tube heavy method construction of shaking, first the deformed bar cage of colligation odd-shaped cross section soldier pile, secondly the odd-shaped cross section stake holes that construction and odd-shaped cross section soldier pile adapt in foundation ditch is needed, then reinforcing cage good for colligation is hung in corresponding stake holes, and concrete perfusion pile.
If the situation in place allows, step 4 and step 5 can be carried out simultaneously.
Claims (9)
1. the closed retaining design of odd-shaped cross section soldier pile, along foundation ditch periphery, it is characterized in that: comprise rejection tee section soldier pile (1) and the cement earth pile (2) that interval is arranged alternately, described odd-shaped cross section soldier pile (1) is deposited reinforced concrete pile, be made up of with the occlusion edge of a wing, Ying Keng side (1.2) of parallel foundation ditch limit wall the web (1.1) of vertical foundation pit limit wall, described odd-shaped cross section soldier pile (1) is connected respectively by the termination, the edge of a wing on the occlusion edge of a wing, Ying Keng side (1.2) cement earth pile (2) of these odd-shaped cross section soldier pile (1) both sides, form closed retaining design.
2. the closed retaining design of odd-shaped cross section soldier pile according to claim 1, is characterized in that: at least two row stakes that described cement earth pile (2) is single-row stake along parallel foundation ditch Bian Bi direction or is mutually connected.
3. the closed retaining design of odd-shaped cross section soldier pile according to claim 1, it is characterized in that: described cement earth pile (2) is set to more than two rows along the direction of vertical foundation pit limit wall, the termination, the edge of a wing on the occlusion edge of a wing, Ying Keng side (1.2) with arrange cement earth pile (2) near one of Ying Keng side and overlap and be engaged.
4. the closed retaining design of odd-shaped cross section soldier pile according to claim 1-3 any one, it is characterized in that: the occlusion edge of a wing, described Ying Keng side (1.2) and web (1.1) form the T-shaped odd-shaped cross section soldier pile of cross section, and described web (1.1) is greater than the width of web (1.1) along the cross section in parallel foundation ditch Bian Bi direction along the height of the cross section in vertical foundation pit Bian Bi direction.
5. the closed retaining design of odd-shaped cross section soldier pile according to claim 1-3 any one, it is characterized in that: described web (1.1) is made up of the leading web (1.1a) of the both sides, parallel foundation ditch Bian Bi direction being positioned at the occlusion edge of a wing, Ying Keng side (1.2) and trailing web (1.1b), described leading web (1.1a), it is criss-cross odd-shaped cross section soldier pile that the occlusion edge of a wing, Ying Keng side (1.2) and trailing web (1.1b) form cross section, described trailing web (1.1b) is greater than the width of trailing web (1.1b) along the cross section in parallel foundation ditch Bian Bi direction along the height of the cross section in vertical foundation pit Bian Bi direction.
6. the closed retaining design of odd-shaped cross section soldier pile according to claim 5 any one, it is characterized in that: described foundation ditch is provided with the waist rail be connected with inner support or anchor pole, the outward flange of leading web (1.1a) is concordant with the outward flange of cement earth pile (2), the height of trailing web (1.1b) is greater than the height of leading web (1.1a), and the height of trailing web (1.1b) is greater than its width.
7. the construction method of the closed retaining design of odd-shaped cross section soldier pile according to claim 1-6 any one, it is characterized in that, construction sequence is as follows:
Step one, according to hydrogeological conditions and the excavation of foundation pit degree of depth of planning to build place, carry out the computational analysis of closed retaining design, select the section form of odd-shaped cross section soldier pile, and determine the cross section geometry of odd-shaped cross section soldier pile, arrangement of reinforcement and pile spacing, determine the stake footpath of cement earth pile, be engaged the lap width on the edge of a wing, the columns of setting and row and construction equipment and construction technology with Ying Keng side;
Step 2, along foundation ditch periphery surveying setting-out, identifies the position of retaining design;
Step 3, in the original position of construction retaining design, the closed cement earth pile of the first odd-shaped cross section soldier pile (1a) both sides of first constructing, is 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) setting and harden, the first odd-shaped cross section soldier pile (1a) of constructing, and ensure that the occlusion edge of a wing, Ying Keng side is all not less than 10cm with the every side of overlap joint length of action of the cement earth pile of first constructing;
Step 5, continues construction the 3rd cement earth pile (2c) along foundation ditch periphery;
Step 6, the second odd-shaped cross section soldier pile (2a) of constructing between the second cement earth pile (2b) and the 3rd cement earth pile (2c), and ensure that every side of the occlusion edge of a wing, Ying Keng side and cement earth pile overlaps length of action and is all not less than 10cm;
Step 7, repeats step 5 and step 6, successively until whole closed retaining design of having constructed.
8. the construction method of the closed retaining design of odd-shaped cross section soldier pile according to claim 7, it is characterized in that: the first odd-shaped cross section soldier pile (1a) in described step 4 is two-tube heavy method construction of shaking, first the deformed bar cage of colligation odd-shaped cross section soldier pile, secondly the odd-shaped cross section stake holes that construction and odd-shaped cross section soldier pile adapt is needed, then deformed bar cage good for colligation is hung in corresponding stake holes, and concrete perfusion pile.
9. the construction method of the closed retaining design of odd-shaped cross section soldier pile according to claim 7, is characterized in that: described step 4 and step 5 are carried out simultaneously.
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| CN201510538442.6A CN105133622B (en) | 2015-08-28 | 2015-08-28 | A kind of closed retaining design of odd-shaped cross section support pile and its construction method |
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| CN201510538442.6A CN105133622B (en) | 2015-08-28 | 2015-08-28 | A kind of closed retaining design of odd-shaped cross section support pile and its construction method |
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| CN106836210A (en) * | 2017-03-14 | 2017-06-13 | 广西桥通工程设计有限公司 | 8-shaped stake with the edge of a wing |
| CN110004991A (en) * | 2019-04-29 | 2019-07-12 | 中铁第一勘察设计院集团有限公司 | Underground structure anti-floating system and construction method based on raised type tangs plate |
| CN116451329A (en) * | 2023-06-14 | 2023-07-18 | 中铁二十三局集团第一工程有限公司 | Parameter design method for composite support of steel pipe pile and cast-in-situ pile |
| CN117211289A (en) * | 2023-11-08 | 2023-12-12 | 中国建筑第六工程局有限公司 | Construction method of multiple systems of foundation in complex environment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836210A (en) * | 2017-03-14 | 2017-06-13 | 广西桥通工程设计有限公司 | 8-shaped stake with the edge of a wing |
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| CN110004991B (en) * | 2019-04-29 | 2023-12-08 | 中铁第一勘察设计院集团有限公司 | Underground structure anti-floating system based on convex wing foot plate and construction method |
| CN116451329A (en) * | 2023-06-14 | 2023-07-18 | 中铁二十三局集团第一工程有限公司 | Parameter design method for composite support of steel pipe pile and cast-in-situ pile |
| CN116451329B (en) * | 2023-06-14 | 2023-08-22 | 中铁二十三局集团第一工程有限公司 | Parameter design method for composite support of steel pipe pile and cast-in-situ pile |
| CN117211289A (en) * | 2023-11-08 | 2023-12-12 | 中国建筑第六工程局有限公司 | Construction method of multiple systems of foundation in complex environment |
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| CN105133622B (en) | 2017-12-05 |
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