CN202745062U - Foundation pit supporting structure closely adjacent to built-up underground structure - Google Patents

Foundation pit supporting structure closely adjacent to built-up underground structure Download PDF

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Publication number
CN202745062U
CN202745062U CN 201220398590 CN201220398590U CN202745062U CN 202745062 U CN202745062 U CN 202745062U CN 201220398590 CN201220398590 CN 201220398590 CN 201220398590 U CN201220398590 U CN 201220398590U CN 202745062 U CN202745062 U CN 202745062U
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CN
China
Prior art keywords
built
construction
underground structure
foundation pit
underground
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Expired - Fee Related
Application number
CN 201220398590
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Chinese (zh)
Inventor
薛勇
李文斌
喻小勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shanghai Municipal Engineering Design Insitute Group Co Ltd filed Critical Shanghai Municipal Engineering Design Insitute Group Co Ltd
Priority to CN 201220398590 priority Critical patent/CN202745062U/en
Application granted granted Critical
Publication of CN202745062U publication Critical patent/CN202745062U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a foundation pit supporting structure closely adjacent to a built-up underground structure. The foundation pit supporting structure closely adjacent to the built-up underground structure is characterized in that one end of each foundation pit supporting component of a subsequently-built underground structure is connected with a vertical component or a horizontal component of a built-up main body structure; the supporting axial force is directly transmitted to the components of the built-up main body structure; and after a foundation pit for the subsequently-built underground structure is dug to the pit bottom, the construction of side wall waterproof layers and reinforced concrete side walls and the construction of roof reinforced concrete and the waterproof layer can be realized through a mode that one end of each supporting component is supported on the built-up main body structure in a support exchange way and then the construction of a bottom plate waterproof layer and a reinforced concrete bottom plate are performed in order. The foundation pit supporting structure closely adjacent to the built-up underground structure has the advantages that under the premise of guaranteeing the safety of project construction and operation and the project quality, the project construction is enabled to more convenient and quicker, the construction risk is decreased, the construction lines and the construction procedures are reduced, the construction period is saved and the manufacturing cost is decreased.

Description

A kind of foundation ditch braced structures that is close to built underground structure
Technical field
The utility model relates to the foundation ditch braced structures of underground structure, is specifically related to a kind of foundation ditch braced structures that is close to built underground structure.
Background technology
Along with the step of urbanization does not stop to stride forward, the development in city is more and more faster, and underground space development will occupy critical role in urban construction.For be close to built underground structure after build the foundation pit supporting system of underground structure since after build that space enclosing structure exists between underground structure and the built underground structure, both are separated.If require built underground structure and after build underground structure and be connected and form continuously outer packaging waterproof layer, just have such problem: the space enclosing structure that how to cut between the two forms one and implements continuous outer packaging waterproof layer to guarantee both structures.Method commonly used cuts space enclosing structure for building the underground structure foundation ditch after excavating to cheating the end in hole end segmentation, builds the underground structure main body behind the carrying out step by step and makes it to form one and realize that outer packaging waterproof layer is continuous with built Main Underground body structure.One of problem of the method is built agent structure segmentation formation multiple tracks constuction joint after being; Two of problem is to cut the space enclosing structure bottom to cause its top part space enclosing structure unsettled unstable, and construction risk is large, is unfavorable for safe construction.
The utility model content
The purpose of this utility model provides a kind of foundation ditch braced structures that is close to built underground structure, builds the use functional requirement that forms continuous space between the underground structure with frame column as the vertical supporting member after satisfying built underground structure and substep.
To achieve these goals, the technical solution of the utility model is: a kind of foundation ditch braced structures that is close to built underground structure, it is characterized in that, after build underground structure foundation ditch supporting member an end be connected with the vertical or horizontal member of built underground structure.Vertical or the horizontal member of described built underground structure is reserved with connector, described connector comprise be arranged on built underground structure side on turn over Vierendeel girder and be reserved in the diagonal brace bearing on the plate in the built underground structure structure.According to specific embodiment of the utility model, after build underground structure foundation ditch supporting member and comprise first horizontal support and diagonal brace, one end of first horizontal support to be turning over Vierendeel girder as fulcrum on the built underground structure side, an end of diagonal brace with the diagonal brace bearing on the plate in the structure of built underground structure as fulcrum.Specifically, one end of first horizontal support with after build underground structure top first Gang Wei Purlin be connected, turning over Vierendeel girder on the other end of first horizontal support and the built underground structure side is connected, one end of diagonal brace with after build underground structure middle part second Gang Wei Purlin be connected, the diagonal brace bearing in the other end of this diagonal brace and the structure of built underground structure on the plate is connected.According to preferred embodiment, diagonal brace and horizontal plane angle are not more than 20 degree.
The utility model be applicable to be close to built underground structure and require with the continuous outsourcing of its waterproofing course can implement step by step after build the foundation pit supporting system of underground structure, after satisfying built underground structure and substep, build between the underground structure with the use functional requirement of frame column as vertical supporting member formation continuous space.Adopt this method for supporting in similar engineering except guaranteeing engineering construction, operation security and quality, its characteristics can make the conversion of engineering construction operation simple and efficient.The method also is applicable to built underground construction and widens and transform and the adjacent underground space is widened connection.The utility model has the advantage of equally under the prerequisite of the safety of guaranteeing engineering construction, operation and workmanship, make engineering construction more simple and efficient, reduce construction risk, reduce constuction joint and working procedure, save the duration, reduce cost.
Description of drawings
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 the space enclosing structure cross-sectional drawing.
The specific embodiment
The utility model will be further described below in conjunction with specific embodiments and the drawings.
Certain rail traffic station is underground two-layer an island platform station, station main body space enclosing structure adopts diaphragm wall under 800 heavy back, 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 the station as accessory structure, the station agent structure is with frame column (post is apart from 8m) and accessory structure be connected as a single entity (station and accessory structure substep are successively implemented, and its correlation is seen plan view 1).Station main body space enclosing structure adopts diaphragm wall, and attached space enclosing structure adopts the engineering method stake.The station agent structure is constructed first, constructs base pit engineering and the inside subject structure of the accessory structure of namely constructing again after the station main structure construction is finished behind the accessory structure.
This engineering for overcoming the problem of job practices existence commonly used, has adopted foundation ditch braced structures of the present utility model for realizing station agent structure and attached agent structure and be connected and forming continuously outer packaging waterproof layer.
The construction sequence of this foundation ditch braced structures is as follows:
(1) the station main structure construction is turned over Vierendeel girder 1 on considering simultaneously to turn over namely on the agent structure top board 16 lateral frame beams, and reservation is built the diagonal brace bearing 11 that attached underground structure foundation pit enclosure structure arranges the steel diagonal brace after supplying during simultaneously main structure construction;
(2) implement accessory structure foundation pit enclosure structure engineering method stake 2 and top beam 3;
(3) by designing requirement cut the earth to satisfy the certain depth of construction space requirement that first supports 4 Gang Wei Purlin 5 is installed after, cut the top concrete 7 of diaphragm wall 6, set up first Horizontal steelwork bracing 4 and first Gang Wei Purlin 5, this step is prior art, does not repeat them here;
(4) by designing requirement cut the earth to satisfy install set up behind the second Construction of Supporting space second steel support 8 and the second steel enclose Purlin 9, this step is prior art, does not repeat them here;
(5) continue to cut the earth by designing requirement and set up diagonal brace 12(diagonal brace angle and determine by designing requirement to satisfying, do not belong to the scope of protection of present invention) construction space after underground diaphragm wall 6 is dug out be used to the hole 10 that sets up diagonal brace 12;
(6) enclosing purlin 9 from the second steel sets up diagonal brace 12 station agent structure floor this moment of the diagonal brace bearing 11(on the plate 17 to the structure that is reserved in built agent structure and builds in advance and finish, the required diagonal brace bearing 11 of its corresponding diagonal brace had been finished already), remove the second steel and support 8, finish support replacement;
(7) cutting diaphragm wall 6(diaphragm wall piecemeal by diaphragm wall framing width (being generally 6m) framing segmentation from top to bottom cuts size and can determine according to the clear span and construction ability, the safety requirements that support 12, do not belong to protection scope of the present invention), diaphragm wall is cut a hole to accessory structure base plate 13 and plain concrete cushion layer 14, should notice that in when design diagonal brace 12 and diagonal brace bearing 11 avoid the frame column 15 of agent structure, certain with frame column 15 maintenances in the plane spacing, this spacing generally is not less than 300mm and is advisable;
(8) build plain concrete cushion layer 14, outer packaging waterproof layer, assembling reinforcement be set, build accessory structure underplate concrete 13;
(9) treat that underplate concrete 13 reaches the intensity of designing requirement (General Requirements reaches more than 80% of concrete strength), rear dismounting second supports 8, and its follow-up construction can be carried out according to a conventional method.
Need to prove, after build accessory structure support (as the first steel support 4, the second steel supports 8) level and vertical distance determine be according to after build outside water and soil loadometers that accessory structure foundation pit enclosure structure engineering method stake (vertically arranging continuously) 2 bears and calculate and determine, these computational methods are prior art, wherein steel diagonal brace 12 is that the second steel supports 8 support replacement, spacing should support 8 consistent with the second steel, support 8 shared Gang Wei Purlin 9 for reducing cost and second steel, it is comparatively suitable that steel diagonal brace 12 and horizontal plane angle generally are not more than 20 degree.Because the station is consistent with accessory structure at the floor elevation of this layer, obtain to do fully in the inherent Practical Project so be controlled at 20 degree.After finishing, the accessory structure main body this diagonal brace bearing 11 can be cut.18 is the structure base slab of built agent structure among the figure, and 19 is cement mixing method.

Claims (4)

1. the foundation ditch braced structures of the built underground structure of next-door neighbour is characterized in that, after build underground structure foundation ditch supporting member an end and built underground structure vertically or horizontal member be connected.
2. foundation ditch braced structures as claimed in claim 1 is characterized in that the vertical or horizontal member of described built underground structure is reserved with connector.
3. foundation ditch braced structures as claimed in claim 2, it is characterized in that described connector comprise be arranged on built underground structure side on turn over Vierendeel girder and be reserved in the diagonal brace bearing on the plate in the structure of built underground structure.
4. foundation ditch braced structures as claimed in claim 3, build underground structure foundation ditch supporting member after it is characterized in that and comprise first horizontal support and diagonal brace, one end of first horizontal support to be turning over Vierendeel girder as fulcrum on the built underground structure side, an end of diagonal brace with the diagonal brace bearing on the plate in the structure of built underground structure as fulcrum.
CN 201220398590 2012-08-13 2012-08-13 Foundation pit supporting structure closely adjacent to built-up underground structure Expired - Fee Related CN202745062U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220398590 CN202745062U (en) 2012-08-13 2012-08-13 Foundation pit supporting structure closely adjacent to built-up underground structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220398590 CN202745062U (en) 2012-08-13 2012-08-13 Foundation pit supporting structure closely adjacent to built-up underground structure

Publications (1)

Publication Number Publication Date
CN202745062U true CN202745062U (en) 2013-02-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220398590 Expired - Fee Related CN202745062U (en) 2012-08-13 2012-08-13 Foundation pit supporting structure closely adjacent to built-up underground structure

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243720A (en) * 2013-05-20 2013-08-14 中冶天工集团有限公司 Soft foundation ultra-deep foundation pit supporting method
CN104452812A (en) * 2014-12-04 2015-03-25 上海建工五建集团有限公司 Construction method of basement outer wall
CN110318418A (en) * 2019-06-13 2019-10-11 成都市建筑设计研究院 A kind of open cut underground station strip accessory structure construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243720A (en) * 2013-05-20 2013-08-14 中冶天工集团有限公司 Soft foundation ultra-deep foundation pit supporting method
CN104452812A (en) * 2014-12-04 2015-03-25 上海建工五建集团有限公司 Construction method of basement outer wall
CN110318418A (en) * 2019-06-13 2019-10-11 成都市建筑设计研究院 A kind of open cut underground station strip accessory structure construction method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130220

Termination date: 20210813

CF01 Termination of patent right due to non-payment of annual fee