CN103290849B - Pit-in-pit supporting structure of half topdown construction method and construction method thereof - Google Patents
Pit-in-pit supporting structure of half topdown construction method and construction method thereof Download PDFInfo
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- CN103290849B CN103290849B CN201310246593.5A CN201310246593A CN103290849B CN 103290849 B CN103290849 B CN 103290849B CN 201310246593 A CN201310246593 A CN 201310246593A CN 103290849 B CN103290849 B CN 103290849B
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Abstract
The invention discloses a pit-in-pit supporting structure of a half topdown construction method and a construction method thereof, relates to a pit-in-pit foundation pit supporting structure of the half topdown construction method and a construction method thereof, and belongs to the technical field of geotechnical engineering. The pit-in-pit supporting structure of the half topdown construction method comprises a pit-in-pit foundation pit supporting structure part and a pit-in-pit underground structure part. A pit-in-pit foundation pit supporting structure comprises an outer pit retaining wall, an outer pit support, an inner pit retaining wall, an inner pit support and a foundation pit reinforcing body. A pit-in-pit underground structure comprises an outer pit underground structure and an inner pit underground structure, wherein a bottom plate of the outer pit underground structure is used as a top plate of the inner pit underground structure as well, and an inner pit supporting function is achieved at the same time. After the construction of the bottom plate of the outer pit underground structure is completed, outer pit underground structure construction can be conducted, and meanwhile inner pit excavation and half topdown construction of the inner pit underground structure are conducted. The pit-in-pit supporting structure of the half topdown construction method and the construction method thereof are simple in structural style and rapid in construction method, effectively improve pit-in-pit foundation pit supporting stiffness, reduce foundation pit deformation and shorten the construction duration of a foundation pit and an underground structure.
Description
Technical field
The present invention relates to pit foundation pit supporting construction and construction method thereof in a kind of semi-inverse method hole, belong to geotechnical engineering Base hole supporting technology field.Be applicable to require pit supporting construction in high hole to Deformation control, more aobvious advantage under especially large in cutting depth, soft layer geological conditions.
Background technology
Base pit engineering " contrary sequence method " technology is for tradition " along the practice " construction method, " contrary sequence method " general principle utilizes bracing of foundation pit wall and interim column as the vertical bearing system in " inverse do " stage, utilize the inner support of beam slab as foundation pit enclosure structure of underground structure, initial surface is made as inverse using zero layer (or underground one deck), from top to bottom carry out the backward construction of underground structure, from bottom to top carry out the sequence construction of agent structure simultaneously, formed with the superstructure of zero layer boundary, the operation of substructure parallel stereo.Bracing of foundation pit wall generally adopts diaphragm wall (the double structure outer doing basement usually, i.e. Two walls unite as one) or bored pile+deeply stir pile water stopping curtain, Underground Construction is generally first built underground structure beam and is formed horizontal pane posture inner support, be convenient to pit earthwork excavation and vertical transport, after completing base plate of foundation pit, carry out building of structural laminate plate again.This method is general only to be used " inverse work " at underground mining, and superstructure of constructing again after underground structure part to be done, so be called " semi-inverse method " or " open type contrary sequence method ".
Base pit engineering is cheated because of its supporting and protection structure complex forms, the feature such as design theory is not mature enough, difficulty of construction is large in hole, adopt tradition along cheat supporting and protection structure in long construction period, implementation process in causing as law technology cheating and soil deformation large, affect underground structure and ground surrounding enviroment, increase in hole and cheat implement general plan.
Summary of the invention
Technical problem: the object of the present invention is to provide a kind of form of structure simple, construction method is quick, effectively improves semi-inverse method foundation pit supporting construction and the construction method thereof of pit foundation hole support stiffness in hole.
Technical scheme: the construction method of pit supporting construction in semi-inverse method hole of the present invention, is characterized in that: this supporting and protection structure comprises at the bottom of outer hole barricade, foundation ditch strengthening body, interior hole barricade, the support of outer hole, outer hole underground structure, the support of interior hole, interior hole underground structure, outer hole underground structure, interior hole underground structure top board, foundation ditch column; Foundation ditch strengthening body is positioned at outside the barricade of outer hole and between outer hole barricade and hole barricade, is positioned on foundation ditch strengthening body at the bottom of the underground structure of outer hole, and outer hole supports and the end of outer hole underground structure is connected on the barricade of outer hole; The end of interior hole support, interior hole underground structure, interior hole underground structure top board is connected on the barricade of interior hole; Outer hole underground structure bottom plate is double does interior hole underground structure top board;
Outer hole underground structure adopts along practice construction, and interior hole underground structure adopts reverse construction; In semi-inverse method hole, the construction method of pit supporting construction comprises the steps:
The first step: first construction is outer cheats barricade, rear construction foundation pit reinforcing body, then hole barricade in construction;
Second step: according to support sequence of excavation, applies outer hole and supports and cheat the soil body, until cheat the end outward outside excavating;
3rd step: construction is outer cheats underground structure bottom plate, connects with interior hole barricade, doublely does interior hole underground structure top board;
4th step: cheat underground structure along practice construction is outer, simultaneously the hole soil body in contrary sequence method excavation, hole underground structure in construction;
5th step: construction to outer hole underground structure completes, construction to interior hole underground structure completes;
6th step: in hole, pit foundation hole is terminated with Underground Construction.
Beneficial effect: the present invention adopts above technical scheme and corresponding construction method, possesses following advantage compared with prior art: underground structure bottom plate is double in outer hole does interior hole underground structure top board, plays the supporting role of interior hole simultaneously.The underground structure bottom plate construction of outer hole is complete, can carry out outer hole Underground Construction, carries out the half against method of interior hole excavation and interior hole underground structure simultaneously.The invention provides a kind of form of structure simple, construction method is quick, effectively improves pit foundation hole support stiffness in hole, reduces foundation pit deformation, shorten foundation ditch and Underground Construction duration.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and case study on implementation, the invention will be further described.
Fig. 1: pit supporting construction generalized section in semi-inverse method hole,
Have in above figure: outer hole barricade 1; Foundation ditch strengthening body 2; Interior hole barricade 3; Outer hole support 4; Outer hole underground structure 5; Interior hole support 6; Interior hole underground structure 7; Outer hole underground structure bottom plate 8; Interior hole underground structure top board 9; Foundation ditch column 10.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail:
" contrary sequence method " mainly adopts steel bar concrete diaphragm wall and steel pipe column as vertical support system, using basement floor as horizontal support, set up a complete support system, then carry out reverse construction basement and bear one deck, negative two layers, negative three layers, base plate of foundation pit, to construct main building simultaneously, shorten the construction period like this, decrease the expense of support system simultaneously, simultaneously little to the Influence on Architecture of surrounding, so the building basement part in area, many down towns adopts contrary sequence method.Contrary sequence method can be divided into full-reverse method, semi-inverse method, the Partial Inverse practice, the reverse hierarchical practice.
" semi-inverse method " excavates orlop floor level under the top plate, then starts construction from base plate-side wall-pillar-floor.
Pit supporting construction and construction method thereof in a kind of semi-inverse method hole of the present invention, concrete implementation and operation step is as follows:
This supporting and protection structure of the present invention to comprise at the bottom of outer hole barricade 1, foundation ditch strengthening body 2, interior hole barricade 3, outer hole support 4, outer hole underground structure 5, interior hole support 6, interior hole underground structure 7, outer hole underground structure 8, interior hole underground structure top board 9, foundation ditch column 10; Foundation ditch strengthening body 2 is outside outer hole barricade 1 and between outer hole barricade 1 and interior hole barricade 3, and at the bottom of the underground structure of outer hole, 8 are positioned on foundation ditch strengthening body 2, and the end of outer hole support 4 and outer hole underground structure 5 is connected on outer hole barricade 1; The end of interior hole support 6, interior hole underground structure 7, interior hole underground structure top board 9 is connected on interior hole barricade 3; Outer hole underground structure bottom plate 8 is double does interior hole underground structure top board 9;
Outer hole underground structure 5 adopts along practice construction, and interior hole underground structure 7 adopts reverse construction; In semi-inverse method hole, the construction method of pit supporting construction comprises the steps:
The first step: first construction outer hole barricade 1, rear construction foundation pit reinforcing body 2, then hole barricade 3 in construction;
Second step: according to support sequence of excavation, the outer hole support 4 of applying also cheats the soil body, until cheat the end outward outside excavation;
3rd step: construction outer hole underground structure bottom plate 8, connects with interior hole barricade 3, doublely does interior hole underground structure top board 9;
4th step: along practice construction outer hole underground structure 5, simultaneously the hole soil body in contrary sequence method excavation, hole underground structure 7 in construction;
5th step: construction to outer hole underground structure 5 completes, construction to interior hole underground structure 7 completes;
6th step: in hole, pit foundation hole is terminated with Underground Construction.
Claims (1)
1. the construction method of pit supporting construction in semi-inverse method hole, is characterized in that: this supporting and protection structure comprises outer hole barricade (1), foundation ditch strengthening body (2), interior hole barricade (3), outer hole support (4), outer hole underground structure (5), interior hole support (6), interior hole underground structure (7), outer hole underground structure bottom plate (8), interior hole underground structure top board (9), foundation ditch column (10); Foundation ditch strengthening body (2) is positioned at outer hole barricade (1) outward and between outer hole barricade (1) and hole barricade (3), outer hole underground structure bottom plate (8) is positioned on foundation ditch strengthening body (2), and the end that outer hole supports (4) and outer hole underground structure (5) is connected on outer hole barricade (1); Interior hole supports (6), interior hole underground structure (7), the end in interior hole underground structure top board (9) is connected on interior hole barricade (3); Outer hole underground structure bottom plate (8) is double does interior hole underground structure top board (9);
Outer hole underground structure (5) adopts along practice construction, and interior hole underground structure (7) adopts reverse construction; In semi-inverse method hole, the construction method of pit supporting construction comprises the steps:
The first step: first construction is outer cheats barricade (1), rear construction foundation pit reinforcing body (2), then hole barricade (3) in construction;
Second step: according to support sequence of excavation, cheat support (4) outside applying and cheat the soil body, until cheat the end outward outside excavation;
3rd step: construction is outer cheats underground structure bottom plate (8), connects with interior hole barricade (3), doublely does interior hole underground structure top board (9);
4th step: cheat underground structure (5) along practice construction is outer, simultaneously the hole soil body in contrary sequence method excavation, hole underground structure (7) in construction;
5th step: construction to outer hole underground structure (5) completes, construction to interior hole underground structure (7) completes;
6th step: in hole, pit foundation hole is terminated with Underground Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246593.5A CN103290849B (en) | 2013-06-20 | 2013-06-20 | Pit-in-pit supporting structure of half topdown construction method and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310246593.5A CN103290849B (en) | 2013-06-20 | 2013-06-20 | Pit-in-pit supporting structure of half topdown construction method and construction method thereof |
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| Publication Number | Publication Date |
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| CN103290849A CN103290849A (en) | 2013-09-11 |
| CN103290849B true CN103290849B (en) | 2015-03-04 |
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| CN201310246593.5A Expired - Fee Related CN103290849B (en) | 2013-06-20 | 2013-06-20 | Pit-in-pit supporting structure of half topdown construction method and construction method thereof |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264681B (en) * | 2014-08-26 | 2016-03-30 | 中国二十冶集团有限公司 | Rolling line sluice foundation ditch is without inner support supporting method |
| CN104234082A (en) * | 2014-08-29 | 2014-12-24 | 中国电建集团华东勘测设计研究院有限公司 | Jump-layer reversed construction method for deep foundation pit |
| CN104452773A (en) * | 2014-11-18 | 2015-03-25 | 上海建工七建集团有限公司 | Construction method for foundation pit support with strengthening structure |
| CN104594358B (en) * | 2015-01-07 | 2017-01-18 | 江苏中南建筑产业集团有限责任公司 | Sequential construction and reversed construction Clockwise and counter-clockwise combined construction method of irregular planar deep foundation pit |
| CN106351331A (en) * | 2016-08-30 | 2017-01-25 | 正太集团有限公司 | Multi-floor basement reverse and normal combined construction process |
| CN108951647A (en) * | 2018-07-18 | 2018-12-07 | 中铁十二局集团第二工程有限公司 | Construction method for supporting is excavated in hole in the hole of open trench tunnel |
| CN111485578A (en) * | 2020-04-24 | 2020-08-04 | 安徽省建筑科学研究设计院 | Stepped edge forward and backward building construction method |
| CN113175075A (en) * | 2021-05-08 | 2021-07-27 | 中建八局第一建设有限公司 | Construction method of large-span steel-concrete structure building |
| CN114277807B (en) * | 2022-01-20 | 2023-06-09 | 中国建筑第八工程局有限公司 | Construction method for underground large-section conversion beam to serve as pit-in-pit support |
| CN117090224A (en) * | 2023-10-18 | 2023-11-21 | 上海建工集团股份有限公司 | Edge-pasting pit-in-pit unsupported enclosure system and construction method thereof |
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| KR20090002344A (en) * | 2007-06-28 | 2009-01-09 | (주)바로건설기술 | Land-side protection wall that use ground structure |
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Effective date of registration: 20190926 Address after: 211802 Jiangsu Province Pukou District Tangquan Street Gaohua Community Feizhuang Group 88-52 Office Patentee after: Nanjing Gongyan Intelligent Construction Technology Co., Ltd. Address before: 210036 No. 399 Jiangdong North Road, Jiangsu, Nanjing Patentee before: The City Vocational College of Jiangsu |
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