CN103806449A - Supporting structure of foundation pit - Google Patents
Supporting structure of foundation pit Download PDFInfo
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- CN103806449A CN103806449A CN201410053900.2A CN201410053900A CN103806449A CN 103806449 A CN103806449 A CN 103806449A CN 201410053900 A CN201410053900 A CN 201410053900A CN 103806449 A CN103806449 A CN 103806449A
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Abstract
The invention discloses a supporting structure of a foundation pit. The supporting structure comprises jet grouting piles and a double-row pile structure which is inserted in the jet grouting piles, wherein the jet grouting piles are high-strength cement-soil pile bodies formed on a soil body around the foundation pit, and the multiple jet grouting piles are in mutual lap joint to form a reinforcing region; the double-row pile structure comprises a first row of cast-in-place piles, a second row of cast-in-place piles and connecting beams, the connecting beams are connected with the tops of the first row of cast-in-place piles and the tops of the second row of cast-in-place piles, and the first row of cast-in-place piles, the second row of cast-in-place piles and the connecting beams are all of a reinforced concrete structure. According to the scheme, the supporting structure aims to brace the deep foundation pit under the complicated geological condition with rich water and soft soil and under the condition that complicated barriers cut through the upper portions of the foundation pit; when the barriers such as cables cut through the upper portion of the foundation pit, the intervals between the cast-in-place piles can be flexibly adjusted to avoid the barriers; the large-diameter high-pressure jet grouting piles are in mutual lap joint, can effectively stop water and can control horizontal displacement of the soil body outside the pit along with the double rows of cast-in-place piles; the supporting structure formed by the cast-in-place piles is constructed in the large-diameter jet grouting piles, and therefore construction sites outside the foundation pit are saved.
Description
Technical field
The present invention relates to construction engineering technical field, relate in particular 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 has obtained larger development.The wider soft soil layer of the many distributions in China developed area, many deep-foundation pit engineerings carry out in city Fu Shui, weak soil environment.Because City Buried Pipeline is numerous, foundation ditch top often exists the obstruction such as critical cables, pipeline to pass through and cannot moving, has cut off the continuity of space enclosing structure, cannot adopt common underground continuous wall construction technique.Row Piles Supporting Structure can be adjusted pile spacing flexibly according to the position of obstruction, thus avoiding obstacles, but can cause that pile spacing is excessive simultaneously and wait the instability of foundation pit risk of generation because periphery stratum is too weak.Adopt major diameter, high-intensity rotary churning pile to reinforce foundation ditch periphery weak soil, meanwhile, in rotary churning pile, apply double castinplace pile the supporting and protection structure in conjunction with foundation ditch inner support composition, can play preferably sealing and the effect of gear soil, and energy avoiding obstacles, saves again the outer construction plant of 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, to pass through in foundation ditch situation with complex barrier thing under the weak geological conditions of complexity, provides 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 in insert in the Double-row-piles Structure in described rotary churning pile; Wherein, described rotary churning pile is the high-strength cement soil pile body being 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 first row castinplace pile and the coupling beam at second row castinplace pile top, is reinforced concrete structure.
The invention has the advantages that: the present invention solves the one of passing through in foundation ditch situation with complex barrier thing under complicated weak geological conditions to go along with sb. to guard him scheme, be applicable to stratum and range of application: Fu Shui, Soft Clay environment, foundation ditch top exists the obstruction such as critical cables, pipeline to pass through and cannot moving, and foundation ditch has the construction space of 5m left and right outward.Major diameter high-pressure rotary jet grouting pile overlaps effective sealing mutually, and controls the horizontal movement of the soil body outside hole 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, can obviously reduce the lateral deformation of foundation ditch; In the time having the obstructions such as cable through foundation ditch, campshed can be adjusted spacing, avoiding obstacles flexibly; 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.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, 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 of the present invention's proposition.As shown in Figure 1, this supporting and protection structure comprises: on the foundation ditch 1 periphery soil body 7 form rotary churning pile and in insert in the double castinplace pile 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 is for reinforcing the soil body of foundation ditch periphery and forming water-stop curtain, and controls the horizontal movement of the soil body outside hole together with double castinplace pile.Described double castinplace pile is made up of first row castinplace pile 2 and second row castinplace pile 3, their radial distribution are in the stabilization zone 4,5 of foundation ditch periphery, be that the construction in the rotary churning pile that forms stabilization zone 4 and 5 of first row castinplace pile 2 and second row castinplace pile 3 is made, 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.Described Double-row-piles Structure is distributed in the inside, stabilization zone of foundation ditch 1 periphery, to form the supporting and protection structure of described foundation ditch.Described Double-row-piles Structure, in the time running into complex barrier thing and pass through above foundation ditch, can be adjusted flexibly pile spacing 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 support 11 and first row castinplace pile 2 between connect by enclosing purlin 8, foundation ditch supports 11 and enclose purlin 8 and be reinforced concrete structure.Described foundation ditch supports 11 the number of plies according to the degree of depth relative set of foundation ditch 1.
Wherein, radical and the position of rotary churning pile there is no particular 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 specific (special) requirements, and described double castinplace pile is between obstruction, and its position and spacing etc. all can be adjusted 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, coupling beam 6 of formation, 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 the supporting as foundation ditch 1 jointly with the supporting and protection structure 10 of other types.The supporting and protection structure 10 of described other types can be the diaphragm wall disconnecting, and its existence due to obstruction 9 is disconnected, and adopts supporting and protection structure of the present invention at open position.
In 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, set up, and be suitable for adopting digging method construction, lid digs the effect that top board plays protection, supports obstruction.Fig. 2 does not indicate that lid digs top board.
Proposed by the invention is to pass through a kind of Extra-Deep Foundation Pit scheme in the situation of foundation ditch top for solving under rich water weak soil complex geological condition with complex barrier thing; In the time that obstructions such as having cable passes through foundation ditch top, between castinplace pile, can adjust flexibly spacing, avoiding obstacles; Major diameter high-pressure rotary jet grouting pile overlaps effective sealing mutually, and controls the horizontal movement of the soil body outside hole 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 modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a foundation pit supporting construction, is characterized in that, comprising: rotary churning pile and in insert in the Double-row-piles Structure in described rotary churning pile; Wherein, described rotary churning pile is the high-strength cement soil pile body being 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 first row castinplace pile and the coupling beam at second row castinplace pile top, is reinforced concrete structure.
2. foundation pit supporting construction as claimed in claim 1, is characterized in that, described first row castinplace pile and second row castinplace pile radial distribution are at foundation ditch periphery, and described first row castinplace pile is near foundation ditch, and described second row castinplace pile is away from foundation ditch.
3. foundation pit supporting construction as claimed in claim 1, is characterized in that, in described Double-row-piles Structure, the array pitch of first row castinplace pile and second row castinplace pile is adjustable.
4. the foundation pit supporting construction as described in claim 1-3 any one, is characterized in that, the spacing in described first row castinplace pile and second row castinplace pile between castinplace pile is adjustable.
5. foundation pit supporting construction as claimed in claim 1, is characterized in that, also comprises that foundation ditch supports, and it is supported between the first row castinplace pile that foundation ditch is inner relative, and described first row castinplace pile is near foundation ditch.
6. foundation pit supporting construction as claimed in claim 5, is characterized in that, also comprises and encloses purlin, and it supports for connecting first row castinplace pile and described foundation ditch.
7. the foundation pit supporting construction as described in claim 5 or 6, is characterized in that, described foundation ditch supports and comprises multilayer, and its number of plies is according to foundation depth and difference.
8. foundation pit supporting construction as claimed in claim 1, is characterized in that, described foundation pit supporting construction is suitable for having in the scope that obstruction passes through, and described double-row pile is between obstruction.
9. foundation pit supporting construction as claimed in claim 8, is characterized in that, described foundation pit supporting construction is positioned at the position that the supporting and protection structure of other types disconnects.
10. foundation pit supporting construction as claimed in claim 9, is characterized in that, the supporting and protection structure of described other type comprises diaphragm wall.
Priority Applications (1)
| 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 true CN103806449A (en) | 2014-05-21 |
| CN103806449B CN103806449B (en) | 2016-01-13 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099894A (en) * | 2014-07-23 | 2014-10-15 | 中交一航局第五工程有限公司 | Anchor-free deep cement sheet-pile wharf |
| CN104563129A (en) * | 2014-12-31 | 2015-04-29 | 云南建工基础工程有限责任公司 | Double-row pile structure with cored horizontal rotary jet grouting pile on pile body |
| 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 |
| CN105696600A (en) * | 2015-05-26 | 2016-06-22 | 中铁十六局集团北京轨道交通工程建设有限公司 | Foundation pit supporting method capable of automatically controlling horizontal displacement of underground diaphragm wall |
| CN106120804A (en) * | 2016-06-26 | 2016-11-16 | 中建三局集团有限公司 | A kind of two grades of support systems of super-giant foundation pit double-row pile and construction method thereof |
| 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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| CN1563606A (en) * | 2004-04-09 | 2005-01-12 | 南京大学 | Method for supporting foundation trench for agitation piles of soil cement with concrete as the core |
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2014
- 2014-02-17 CN CN201410053900.2A patent/CN103806449B/en active Active
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| CN1563606A (en) * | 2004-04-09 | 2005-01-12 | 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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099894A (en) * | 2014-07-23 | 2014-10-15 | 中交一航局第五工程有限公司 | Anchor-free deep cement sheet-pile wharf |
| 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 |
| CN104563129A (en) * | 2014-12-31 | 2015-04-29 | 云南建工基础工程有限责任公司 | Double-row pile structure with cored horizontal rotary jet grouting pile on pile body |
| CN105696600A (en) * | 2015-05-26 | 2016-06-22 | 中铁十六局集团北京轨道交通工程建设有限公司 | Foundation pit supporting method capable of automatically controlling horizontal displacement of underground diaphragm wall |
| 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 |
| CN106120804A (en) * | 2016-06-26 | 2016-11-16 | 中建三局集团有限公司 | A kind of two grades of support systems of super-giant foundation pit double-row pile and construction method thereof |
| 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 | Publication date |
|---|---|
| CN103806449B (en) | 2016-01-13 |
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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. |
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