CN103806449B - A kind of foundation pit supporting construction - Google Patents
A kind of foundation pit supporting construction Download PDFInfo
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- CN103806449B CN103806449B CN201410053900.2A CN201410053900A CN103806449B CN 103806449 B CN103806449 B CN 103806449B CN 201410053900 A CN201410053900 A CN 201410053900A CN 103806449 B CN103806449 B CN 103806449B
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Abstract
The invention discloses a kind of foundation pit supporting construction, comprising: rotary churning pile and the interior Double-row-piles Structure inserted in described rotary churning pile; Wherein, described rotary churning pile is the high-strength cement soil pile body be formed on the foundation ditch periphery soil body, and many described rotary churning piles mutually overlap and form stabilization zone; Described Double-row-piles Structure comprises first row castinplace pile, second row castinplace pile and is connected the coupling beam at first row castinplace pile and second row castinplace pile top, is reinforced concrete structure.What the present invention proposed is a kind of Extra-Deep Foundation Pit scheme of passing through with complex barrier thing under the rich water weak soil complex geological condition of solution above foundation ditch in situation; When obstructions such as having cable passes through above foundation ditch, spacing can be adjusted flexibly between castinplace pile, avoiding obstacles; Major diameter high-pressure rotary jet grouting pile overlaps effective sealing mutually, and controls the horizontal movement of cheating the outer soil body together with double castinplace pile, meanwhile, applies the supporting and protection structure of castinplace pile composition in major diameter rotary churning pile, saves the outer construction plant of foundation ditch.
Description
Technical field
The present invention relates to construction engineering technical field, particularly relate to a kind of foundation pit supporting construction of underground construction.
Background technology
Along with the development of urbanization, the utilization of the underground space is more and more taken seriously, and base pit engineering obtains larger development.The soft soil layer that the many distributions in China developed area are wider, many deep-foundation pit engineerings carry out in city Fu Shui, weak soil environment.Because City Buried Pipeline is numerous, often there is the obstruction such as critical cables, pipeline above foundation ditch and to pass through and cannot moving, cut off the continuity of space enclosing structure, common underground continuous wall construction technique cannot be adopted.Row Piles Supporting Structure can adjust pile spacing flexibly according to the position of obstruction, thus avoiding obstacles, but can cause pile spacing instability of foundation pit risk that is excessive and that wait generation because surrounding formations is too weak simultaneously.The rotary churning pile of major diameter, high strength is adopted to reinforce foundation ditch periphery weak soil, meanwhile, in rotary churning pile, apply double castinplace pile and the supporting and protection structure formed in conjunction with internal support of foundation pit, sealing and the effect of gear soil can be played preferably, and can avoiding obstacles, the again outer construction plant of saving foundation ditch.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of foundation pit supporting construction, pass through foundation ditch situation with complex barrier thing under complicated Unfavorable geology condition under, to provide supporting effect good supporting and protection structure.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of foundation pit supporting construction, comprising: rotary churning pile and the interior Double-row-piles Structure inserted in described rotary churning pile; Wherein, described rotary churning pile is the high-strength cement soil pile body be formed on the foundation ditch periphery soil body, and many described rotary churning piles mutually overlap and form stabilization zone; Described Double-row-piles Structure comprises first row castinplace pile, second row castinplace pile and is connected the coupling beam at first row castinplace pile and second row castinplace pile top, is reinforced concrete structure.
The invention has the advantages that: the present invention is a kind of supporting scheme passed through with complex barrier thing under the complicated Unfavorable geology condition of solution in foundation ditch situation, be applicable to stratum and range of application: Fu Shui, Soft Clay environment, there is the obstruction such as critical cables, pipeline above foundation ditch to pass through and cannot moving, outside foundation ditch, have the construction space of about 5m.Major diameter high-pressure rotary jet grouting pile overlaps effective sealing mutually, and controls the horizontal movement of cheating the outer soil body together with castinplace pile; Double castinplace pile top is connected and fixed formation Double-row-piles Structure by coupling beam, and Double-row-piles Structure has larger lateral rigidity, obviously can reduce the lateral deformation of foundation ditch; When there being the obstructions such as cable through foundation ditch, campshed can adjust spacing flexibly, avoiding obstacles; Meanwhile, in major diameter rotary churning pile, apply the supporting and protection structure of castinplace pile composition, save outer construction plant, hole.
Accompanying drawing explanation
Fig. 1 is the facade structures schematic diagram of foundation pit supporting construction in the present invention;
Fig. 2 is the cross sectional representation of foundation pit supporting construction in the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
Fig. 1 shows the facade structures schematic diagram of a kind of foundation pit supporting construction that the present invention proposes.As shown in Figure 1, this supporting and protection structure comprises: the rotary churning pile that the foundation ditch 1 periphery soil body 7 is formed and the interior double castinplace pile inserted in described rotary churning pile.Many described rotary churning piles mutually overlap and form stabilization zone 4,5, described stabilization zone is the high-strength cement soil pile body by cement paste and soil layer being thoroughly mixed to form by jet mixing method in foundation ditch 1 periphery soil layer, it for reinforcing the soil body of foundation ditch periphery and forming water-stop curtain, and controls the horizontal movement of cheating the outer soil body together with double castinplace pile.Described double castinplace pile is made up of first row castinplace pile 2 and second row castinplace pile 3, they are radially distributed in the stabilization zone 4,5 of foundation ditch periphery, namely the construction in the rotary churning pile forming stabilization zone 4 and 5 of first row castinplace pile 2 and second row castinplace pile 3 makes, and it is made up of steel concrete.
The top of described first row castinplace pile 2 and second row castinplace pile 3 is connected and fixed formation Double-row-piles Structure by coupling beam 6, and coupling beam 6 is reinforced concrete structure.The stabilization zone that described Double-row-piles Structure is distributed in foundation ditch 1 periphery is inner, to form the supporting and protection structure of described foundation ditch.Described Double-row-piles Structure, when running into complex barrier thing and passing through above foundation ditch, can adjust pile spacing flexibly and arrange, avoiding obstacles.
In described Double-row-piles Structure, first row castinplace pile 2 is near foundation ditch 1, and second row castinplace pile 3 is away from foundation ditch 1, and foundation ditch 1 inside has foundation ditch and supports 11, for supporting relative first row castinplace pile 2; Described foundation ditch supports between 11 and first row castinplace pile 2 and connects by enclosing purlin 8, and foundation ditch supports 11 and enclose purlin 8 and be reinforced concrete structure.Described foundation ditch supports the number of plies of 11 according to the degree of depth relative set of foundation ditch 1.
Wherein, the radical of rotary churning pile and position there is no special restriction, as long as can play the effect of reinforcing the foundation ditch periphery soil body.In addition, the array pitch of double-row pile, spacing, position are all without particular/special requirement, and described double castinplace pile is between obstruction, and its position and spacing etc. all can adjust according to the position of obstruction.
Fig. 2 shows the cross sectional representation of foundation pit supporting construction in the present invention.As shown in Figure 2, described foundation pit supporting construction comprises: first row castinplace pile 2, second row castinplace pile 3, major diameter high-pressure rotary jet grouting pile mutually overlap the stabilization zone 4 and 5 of formation, coupling beam 6, for be connected foundation ditch support 11 and first row castinplace pile 2 enclose purlin 8 and foundation ditch supports 11.Described double castinplace pile is arranged in the rotary churning pile between obstruction.Described supporting and protection structure of the present invention is connected with the supporting and protection structure 10 of other types jointly as the supporting of foundation ditch 1.The supporting and protection structure 10 of described other types can be the diaphragm wall disconnected, its existence due to obstruction 9 and being disconnected, and adopts supporting and protection structure of the present invention at open position.
The scope that the foundation pit supporting construction that the present invention proposes is particularly useful for having obstruction to pass through in foundation ditch is interior to be set up, and is suitable for adopting digging method construction, and lid digs top board and plays protection, supports the effect of obstruction.Fig. 2 does not indicate that lid digs top board.
Proposed by the invention is under solving rich water weak soil complex geological condition and complex barrier thing pass through a kind of Extra-Deep Foundation Pit scheme above foundation ditch in situation; When obstructions such as having cable passes through above foundation ditch, spacing can be adjusted flexibly between castinplace pile, avoiding obstacles; Major diameter high-pressure rotary jet grouting pile overlaps effective sealing mutually, and controls the horizontal movement of cheating the outer soil body together with double castinplace pile, meanwhile, applies the supporting and protection structure of castinplace pile composition in major diameter rotary churning pile, can save the outer construction plant of foundation ditch.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a foundation pit supporting construction, is characterized in that, comprising: rotary churning pile and the interior Double-row-piles Structure inserted in described rotary churning pile;
Wherein, described rotary churning pile is the high-strength cement soil pile body be formed on the foundation ditch periphery soil body, and many described rotary churning piles mutually overlap and form stabilization zone; Described Double-row-piles Structure comprises first row castinplace pile, second row castinplace pile and is connected the coupling beam at first row castinplace pile and second row castinplace pile top, is reinforced concrete structure;
Described first row castinplace pile and second row castinplace pile are radially distributed in foundation ditch periphery, and described first row castinplace pile is near foundation ditch, and described second row castinplace pile is away from foundation ditch;
In described Double-row-piles Structure, the array pitch of first row castinplace pile and second row castinplace pile is adjustable; Spacing in described first row castinplace pile and second row castinplace pile between castinplace pile is adjustable;
Described foundation pit supporting construction also comprises foundation ditch and supports, and it is supported between the inner relative first row castinplace pile of foundation ditch, and described first row castinplace pile is near foundation ditch;
Described foundation pit supporting construction also comprises Wei Purlin, and it is for connecting first row castinplace pile and the support of described foundation ditch; Described foundation ditch supports and comprises multilayer, and its number of plies is different according to foundation depth;
In the scope that described foundation pit supporting construction is suitable for having obstruction to pass through, described double-row pile is between obstruction;
The position that the supporting and protection structure that described foundation pit supporting construction is positioned at other types disconnects; The supporting and protection structure of other type described comprises diaphragm wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410053900.2A CN103806449B (en) | 2014-02-17 | 2014-02-17 | A kind of foundation pit supporting construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410053900.2A CN103806449B (en) | 2014-02-17 | 2014-02-17 | A kind of foundation pit supporting construction |
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| CN103806449A CN103806449A (en) | 2014-05-21 |
| CN103806449B true CN103806449B (en) | 2016-01-13 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099894B (en) * | 2014-07-23 | 2016-02-24 | 中交一航局第五工程有限公司 | A kind of without anchor deep-cement sheet-pile wharf |
| CN104563129B (en) * | 2014-12-31 | 2016-05-25 | 云南建工基础工程有限责任公司 | A kind of pile body is provided with the Double-row-piles Structure that adds the stake of core horizontal jet grouting |
| CN105696600B (en) * | 2015-05-26 | 2017-07-28 | 中铁十六局集团北京轨道交通工程建设有限公司 | A kind of foundation pit supporting method of automatic controlled underground diaphragm wall horizontal displacement |
| CN105544556A (en) * | 2015-12-29 | 2016-05-04 | 湖北中南勘察基础工程有限公司 | Foundation pit supporting construction technology combining equal-thickness cement-soil diaphragm wall and tubular piles |
| CN106120804B (en) * | 2016-06-26 | 2018-12-11 | 中建三局集团有限公司 | A kind of super-giant foundation pit double-row pile second level support system and its construction method |
| CN106480889A (en) * | 2016-11-14 | 2017-03-08 | 上海岩土工程勘察设计研究院有限公司 | A kind of Pile of Deep Foundation Pit method of reinforcement design |
| CN107288135A (en) * | 2017-07-19 | 2017-10-24 | 昆明理工大学 | A kind of inter-pile soil reinforcement means of foundation ditch Double-row Piles Support |
| CN113389206A (en) * | 2021-07-05 | 2021-09-14 | 中国建筑第八工程局有限公司 | Foundation pit enclosure system and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1296571C (en) * | 2004-04-09 | 2007-01-24 | 南京大学 | Method for supporting foundation trench for agitation piles of soil cement with concrete as the core |
| CN101519880A (en) * | 2009-03-02 | 2009-09-02 | 浙江大学 | Method of using rotational multiaxial borehole pouring concrete occluding pile wall for enclosing deep foundation pit and slope protection project |
| CN203924071U (en) * | 2014-02-17 | 2014-11-05 | 中交公路规划设计院有限公司 | A kind of foundation pit supporting construction |
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Effective date of registration: 20210906 Address after: 100088 CCCC building, 85 Deshengmenwai street, Xicheng District, Beijing Patentee after: CCCC Highway Consultants Co.,Ltd. Patentee after: CCCC HIGHWAY BRIDGES NATIONAL ENGINEERING RESEARCH CENTER Co.,Ltd. Address before: 100088 CCCC building, 85 Deshengmenwai street, Xicheng District, Beijing Patentee before: CCCC Highway Consultants Co.,Ltd. |