CN103590404B - A kind of foundation ditch method for supporting being close to built underground structure - Google Patents

A kind of foundation ditch method for supporting being close to built underground structure Download PDF

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Publication number
CN103590404B
CN103590404B CN201210285970.1A CN201210285970A CN103590404B CN 103590404 B CN103590404 B CN 103590404B CN 201210285970 A CN201210285970 A CN 201210285970A CN 103590404 B CN103590404 B CN 103590404B
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construction
underground structure
built
foundation ditch
diagonal brace
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CN103590404A (en
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薛勇
李文斌
喻小勇
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Abstract

The invention discloses a kind of foundation ditch method for supporting being close to built underground structure, it is characterized in that by after build underground structure foundation ditch supporting member one end be supported on the vertical of built agent structure or horizontal member, axial force of the supports is directly reached on built agent structure component, building underground structure foundation ditch after can realizing cuts the earth to the end, hole, by support replacement, one end of supporting member is supported in built agent structure, then carry out base plate waterproofing and reinforced concrete floor construction successively, side wall waterproofing course and the construction of steel concrete side wall and roof steel bar concrete and construction of waterproof layer.The invention has the advantages that under guaranteeing engineering construction, the safety of operation and the prerequisite of workmanship, make engineering construction more simple and efficient, reduce construction risk, reduce constuction joint and working procedure, save the duration, reduce cost.

Description

A kind of foundation ditch method for supporting being close to built underground structure
Technical field
The foundation ditch that the present invention relates to underground structure supports, and is specifically related to a kind of foundation ditch method for supporting being close to built underground structure.
Background technology
Step along with urbanization does not stop to stride forward, and the development in city is more and more faster, and underground space development will occupy critical role in urban construction.For the foundation pit supporting system building underground structure after being close to built underground structure, due to after build space enclosing structure between underground structure and built underground structure and exist, both are separated.If require built underground structure and after build underground structure and be connected and form continuous outer waterproofing layer, just have such problem: how to cut space enclosing structure between the two to guarantee that both structures form one and implement continuous outer waterproofing layer.Conventional method, for building underground structure foundation ditch to cheating the end after excavation, cuts space enclosing structure in hole end segmentation, builds underground structure main body and make it to be formed with built Main Underground body structure integrally and to realize outer waterproofing layer continuous after carrying out step by step.One of problem of the method is built agent structure segmentation and is formed multiple tracks constuction joint after being; Two of problem cuts bottom space enclosing structure to cause the unsettled instability of its upper part space enclosing structure, and construction risk is large, is unfavorable for safe construction.
Summary of the invention
The object of this invention is to provide a kind of foundation ditch method for supporting being close to built underground structure, after meeting built underground structure and substep, build the using function requirement forming continuous space between underground structure using frame column as vertical supporting component.
To achieve these goals, technical scheme of the present invention is: a kind of foundation ditch method for supporting being close to built underground structure, it is characterized in that by after build underground structure foundation ditch supporting member one end be supported on the vertical of built underground structure or horizontal member, foundation ditch axial force of the supports is directly reached on built underground structure component, building underground structure foundation ditch after realization cuts the earth to the end, hole, by support replacement, one end of supporting member is supported on built underground structure, then carry out base plate waterproofing and reinforced concrete floor construction successively, side wall waterproofing course and the construction of steel concrete side wall and roof steel bar concrete and construction of waterproof layer.
Concrete steps of the present invention are: when A, built Underground Construction, side frame is turned on setting a roof beam in place, and build the diagonal brace bearing that underground structure foundation pit enclosure structure arranges diagonal brace reserve confession when this built Underground Construction after; B, after when building Underground Construction, cut the earth to diagonal brace position, the space enclosing structure of built underground structure dug out and diagonal brace hole is installed and diagonal brace is installed, complete support replacement; C, cut the space enclosing structure component of built underground structure, after build underground structure subsequent construction routinely construction method implement.
The present invention is applicable to be close to built underground structure and builds the foundation pit supporting system of underground structure after requiring can to implement step by step with the continuous outsourcing of its waterproofing course, after meeting built underground structure and substep, build the using function requirement forming continuous space between underground structure using frame column as vertical supporting component.In similar engineering, adopt this method for supporting except guarantee engineering construction, operation security and quality, it is simple and efficient that its feature can make engineering construction operation change.The method is also applicable to existed underground project widen and rebuild and widens with the adjacent underground space and be communicated with.The invention has the advantages that and guaranteeing, under engineering construction, the safety of operation and the prerequisite of workmanship, to make engineering construction more simple and efficient equally, reduce construction risk, reduce constuction joint and working procedure, save the duration, reduce cost.
Accompanying drawing explanation
Fig. 1 is space enclosing structure supporting plane arrangement diagram, and wherein Fig. 1 a is first supporting plane arrangement diagram, and Fig. 1 b is the layout plan that second supports.
Fig. 2 is space enclosing structure cross-sectional drawing.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the invention will be further described.
A kind of foundation ditch method for supporting being close to built underground structure, it is characterized in that by after build underground structure foundation ditch supporting member one end be supported on the vertical of built underground structure or horizontal member, foundation ditch axial force of the supports directly can be reached on built underground structure component, building underground structure foundation ditch after can realizing cuts the earth to the end, hole, by support replacement, one end of supporting member is supported on built underground structure, then carry out base plate waterproofing and reinforced concrete floor construction successively, side wall waterproofing course and the construction of steel concrete side wall and roof steel bar concrete and construction of waterproof layer.
Certain rail traffic station is two-layer an island platform station, underground, station main body space enclosing structure adopts 800 thick diaphragm walls, this station accessory structure arranges 7 accesss and 2 ventilating shafts (being underground structure) altogether, wherein two accesss are connected with gallery, length is 72m, parallel with station as accessory structure, station agent structure is with frame column 15(post distance 8m) be connected as a single entity with accessory structure (station and accessory structure substep are successively implemented, and its correlation is shown in plan view 1).Station main body space enclosing structure adopts diaphragm wall, and attached space enclosing structure adopts engineering method stake.Station agent structure is first constructed, and constructs after accessory structure, the base pit engineering of accessory structure of namely constructing again after station main structure construction completes and inside subject structure.Namely station agent structure is built underground structure of the present invention, and accessory structure then builds underground structure after of the present invention.
This engineering, for realizing station agent structure and accessory structure is connected and forms continuous outer waterproofing layer, for overcoming conventional construction method Problems existing, have employed method of the present invention.
The construction sequence of this method is as follows:
(1) station main structure construction considers that agent structure top board 16 side frame is turned over namely and turned over Vierendeel girder 1 on setting a roof beam in place simultaneously, reserve during main structure construction simultaneously for after build the diagonal brace bearing 11 that attached underground structure foundation pit enclosure structure arranges steel diagonal brace;
(2) accessory structure foundation pit enclosure structure engineering method stake 2 and top beam 3 is implemented;
(3) after supporting the certain depth of the construction space requirement of 4 Gang Wei Purlin 5 by designing requirement shoveling to satisfied installation first, cut the top concrete 7 of diaphragm wall 6, erection first Gang Wei Purlin 5 and first Horizontal steelwork bracing 4, one end of described first Horizontal steelwork bracing 4 is agent structure to be turned over Vierendeel girder 1 for fulcrum connection;
(4) cut the earth to meeting to install by designing requirement and set up second bracing members 8 behind second Construction of Supporting space and second steel encloses Purlin 9, this step is prior art, does not repeat them here;
(5) continue to cut the earth to meeting erection diagonal brace 12(diagonal brace angle by designing requirement determine by designing requirement) construction space after hole 10 for setting up diagonal brace 12 is dug out to diaphragm wall 6;
(6) enclose purlin 9 from second steel and set up diagonal brace 12, one end of described diagonal brace 12 is connected with the diagonal brace bearing 11 on plate in the structure being reserved in built agent structure 17 that (now agent structure floor in station has been built in advance, its diagonal brace bearing 11 needed for corresponding diagonal brace completed already), remove second bracing members 8, complete support replacement;
(7) cut diaphragm wall 6(diaphragm wall piecemeal by diaphragm wall framing width (being generally 6m) framing segmentation from top to bottom to cut size and can determine according to the clear span of diagonal brace 12 and construction ability, safety requirements, do not belong to protection scope of the present invention), by diaphragm wall cutter to accessory structure base plate 13 and plain concrete cushion layer 14, should notice that the frame column 15 of agent structure avoided by diagonal brace 12 and diagonal brace bearing 11 when designing, keep certain spacing with frame column 15 in the plane, this spacing is generally not less than 300mm and is advisable;
(8) build plain concrete cushion layer 14, outer waterproofing layer is set, assembling reinforcement, build accessory structure underplate concrete 13;
(9) treat that underplate concrete 13 reaches the intensity (General Requirements reaches more than 80% of concrete strength) of designing requirement, rear dismounting second supports 8, and its subsequent construction can be carried out according to a conventional method.
It should be noted that, after build the level of the support (as first bracing members 4, second bracing members 8) of accessory structure and vertical distance determine according to after build accessory structure foundation pit enclosure structure engineering method stake (longitudinally arranging continuously) 2 the outside water and soil load that bears calculate and determine, these computational methods are prior art, wherein steel diagonal brace 12 is support replacements of second bracing members 8, spacing should be consistent with second bracing members 8, for reducing cost and share Gang Wei Purlin 9 with second bracing members 8, steel diagonal brace 12 and horizontal plane angle be generally not more than 20 degree comparatively suitable.Because station and accessory structure are consistent at the floor elevation of this layer, so control to obtain completely in Practical Project in 20 degree.This diagonal brace bearing 11 can be cut after accessory structure main body completes.In figure, 18 is the structure base slab of built agent structure, and 19 is cement mixing method.

Claims (1)

1. the foundation ditch method for supporting of the built underground structure of next-door neighbour, it is characterized in that by after build underground structure foundation ditch supporting member one end be supported on the vertical of built underground structure or horizontal member, axial force of the supports is directly reached on built underground structure component, building underground structure foundation ditch after realization cuts the earth to the end, hole, by support replacement, one end of supporting member is supported on built underground structure, then carry out base plate waterproofing and reinforced concrete floor construction successively, side wall waterproofing course and the construction of steel concrete side wall and roof steel bar concrete and construction of waterproof layer, concrete steps are:
When A, built Underground Construction, side frame is turned on setting a roof beam in place, and builds the diagonal brace bearing that underground structure foundation pit enclosure structure arranges diagonal brace during built Underground Construction after reserving; B, after when building Underground Construction, cut the earth to diagonal brace position, the space enclosing structure of built underground structure dug out and diagonal brace hole is installed and diagonal brace is installed, complete support replacement; C, cut the space enclosing structure component of built underground structure, after build underground structure subsequent construction routinely construction method implement.
CN201210285970.1A 2012-08-13 2012-08-13 A kind of foundation ditch method for supporting being close to built underground structure Active CN103590404B (en)

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CN103924789B (en) * 2014-03-14 2015-12-16 中冶建筑研究总院有限公司 Come into operation platform transformation diagonal brace widening structure
CN104452812B (en) * 2014-12-04 2016-09-14 上海建工五建集团有限公司 The construction method of outer wall of basement
CN106400812A (en) * 2016-10-27 2017-02-15 中铁第四勘察设计院集团有限公司 Foundation pit partition support structure and support method based on foundation pit partition support structure
CN106988440A (en) * 2017-01-25 2017-07-28 广州地铁设计研究院有限公司 A kind of waterproof construction and its construction method at subway station main body and accessory interface
CN106948350B (en) * 2017-05-10 2018-10-16 中铁隧道集团四处有限公司 The rapid constructing method of deep basal pit accessory structure
CN107034888A (en) * 2017-06-23 2017-08-11 北京城乡建设集团有限责任公司 A kind of subway station is with matingly descending commercial facility to share fender post amputation method
CN107288136A (en) * 2017-08-17 2017-10-24 中国建筑第八工程局有限公司 The structure and its method of building foundation pit protection
CN108643190A (en) * 2018-04-12 2018-10-12 中铁上海工程局集团有限公司 A kind of construction method suitable for the larger deep foundation pit supporting structure of excavation area
CN109236335B (en) * 2018-08-24 2019-11-19 中国建筑第八工程局有限公司 Penetrate the anchor hole construction method for adjoining built supporting construction
CN110106892B (en) * 2019-04-04 2021-08-10 中国建筑第八工程局有限公司 Construction method for large-span breaking of underground diaphragm wall

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JP2821619B2 (en) * 1989-06-23 1998-11-05 株式会社竹中工務店 Drainage structure of underground structures
CN2647920Y (en) * 2003-07-23 2004-10-13 顺德市永基建筑基础有限公司 Diagonal post supporting ground hole for construction
CN1837506B (en) * 2006-04-12 2012-02-15 上海市政工程设计研究总院 Construction method for excavating box-shape structure over an operating tunnel
CN101831873B (en) * 2010-05-25 2011-11-09 北京城建设计研究总院有限责任公司 Temporary bridge covered excavation method for constructing box culvert below traffic ground line of operating track
CN201794079U (en) * 2010-09-26 2011-04-13 济南大学 Foundation pit supporting system

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