CN101498133B - Method and supporting construction for enlarging basement top-down method earth excavation space - Google Patents

Method and supporting construction for enlarging basement top-down method earth excavation space Download PDF

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Publication number
CN101498133B
CN101498133B CN2009100374032A CN200910037403A CN101498133B CN 101498133 B CN101498133 B CN 101498133B CN 2009100374032 A CN2009100374032 A CN 2009100374032A CN 200910037403 A CN200910037403 A CN 200910037403A CN 101498133 B CN101498133 B CN 101498133B
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floor
steel pipe
basement
negative
construction
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CN101498133A (en
Inventor
姚志雄
李鹏生
李建友
邝舜杰
刘惠锋
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Guangzhou Pearl River Construction Development Co., Ltd
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GUANGZHOU HOUSING CONSTRUCTION DEVELOPMENT Co Ltd
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Abstract

The invention discloses a method for digging earth to form space in an inverse method for enlarging a basement. The method is applied to a basement foundation ditch of a support system which forms the peripheric space enclosing structure of the basement, supporting steel pipe columns in the middle, the floor slab structure of +/- 0.000 floor and the floor slab structure of the first floor underground by construction. A floor slab crossing the floor along the periphery of the basement on the second floor underground is first constructed, then a steel pipe is used for upwards and obliquely supporting the steel pipe column which is topped to the inward floor of the first floor underground from the steel pipe column at the side of the floor slab crossing the floor, a mutual opposite vertex bracing structure which can transmit side pressure transmitted from the peripheric space enclosing structure of the floor slab of the first floor underground first by the floor slab which is constructed on the second floor underground and then by the steel pipe which is obliquely supported is formed, thereby space in which earth for two floors can be fully dug is formed. The invention also discloses a supporting structure. By the actual operation of the method, under the circumstance that the floor slab structure of the second floor underground does not need to be fully constructed, enough upper lever rigidity can be ensured to enable the earth of the second floor underground and the third floor ground of the basement to be dug once by a large type pullshovel excavator, thereby the degree of advancement for digging the earth of the basement is greatly enhanced, and obvious economic benefit and social benefit are obtained.

Description

Increase the method and the supporting and protection structure in basement top-down method earth excavation space
Technical field
The present invention relates to technical field of building construction, be specifically related to a kind of method and supporting and protection structure that increases the basement top-down method earth excavation space.
Background technology
Contrary sequence method is the emerging deep foundation pit construction technology that grows up the nearly more than ten years, its principle is: first external wall construction diaphragm wall or do space enclosing structure such as solid matter fender post around the building basement, simultaneously build or lay intermediate support stake and post, before the base plate back cover, bear the support of superstructure deadweight and working load as construction period in the center and the positions such as longitudinal and transverse frame beams and shear wall intersection of building basement post; Construct the then beam slab floor structure of ground one deck, as diaphragm wall rigidity maximum support, earth excavation and build each layer underground structure (each layer reserved the soil outlet and the feed opening of lower floor) downwards successively subsequently is until the base plate back cover; Simultaneously, because the floor structure of ground one deck is finished,, successively carry out the construction of floor structure on the ground so can make progress simultaneously for condition has been created in the superstructure construction.So ground is upper and lower constructs simultaneously, finishes until engineering.Since contrary sequence method have the safety that improves underground construction, greatly save construction costs, shorten the construction period, prevent that ground occurs sinking on every side, effectively lower characteristics such as deep foundation pit support collapse accident incidence, therefore have extraordinary development prospect and promotional value.
Yet, in the construction of multi-storey basement pit top-down soil excavation, the earthwork of the each excavation downwards of general designing requirement one deck structure height, one deck basement floor of will constructing, after the construction of this floor plate finishes and reaches certain intensity with it as the braced structures to the peripheral diaphragm wall of foundation ditch, the earthwork that could excavate down one deck then.The soil excavation headway of basement bottom floor just can't satisfy and adopts large and medium-sized backacter to carry out excavation and construction like this, and can only adopt artificial or mini-excavator is cut the earth, and construction speed will be very slow.
Summary of the invention
First purpose of the present invention is at the deficiencies in the prior art part, and a kind of method that increases contrary sequence method excavation basement construction space is provided, and creates the large space execution conditions for two-layer cubic metre of earth for adopting the disposable excavation of large and medium-sized backacter smoothly.
Second purpose of the present invention aims to provide a kind of deep foundation pit supporting structure, is applicable to the large space of two-layer cubic metre of earth of the disposable excavation of large and medium-sized backacter with formation.
For reaching first purpose, the present invention adopts following technical scheme: increase the method in basement top-down method earth excavation space, be applied to construction be formed with comprise basement all around protection structure, intermediate support steel pipe column, ± basement foundation ditch of the support system of 0.000 floor plated construction and negative first floor plated construction; Construction is earlier striden floor along one of basement periphery for negative two layers, extremely bear the steel pipe column that one deck is striden toward the inside one with steel pipe from this upward support of steel pipe column of striding the floor limit again, formation can with basement all around the lateral pressure that transmits of protection structure earlier by the floors of negative two layers of construction earlier, again by this diagonal brace steel pipe pass to negative one deck floor mutually to the top braced structures, thereby form the space of enough once excavating two-layer cubic metre of earth.
As preferably, above-mentioned diagonal brace steel pipe connects the space enclosing structure of side in the orthography of horizontal plane perpendicular to it.
Above-mentioned diagonal brace steel pipe is the steel pipe that building superstructure steel pipe column is used.After basement construction is finished, remove those diagonal brace steel pipes and also process slightly, promptly can be used as steel pipe column and be used for the building superstructure.
As preferably, above-mentioned building basement all around protection structure is a diaphragm wall.
For reaching second purpose, the present invention adopts following technical scheme: a kind of supporting and protection structure, comprise basement all around protection structure, interior of building the intermediate support steel pipe column, ± 0.000 floor plated construction and negative first floor plated construction; Also comprise along one of negative two layers of basement periphery construction and stride floor, and some diagonal brace steel pipes, one end of diagonal brace steel pipe is supported in the node place that one of negative two layers of periphery are striden floor limit and steel pipe column formation, and the other end is supported in negative one deck and strides the node place that floor and steel pipe column form toward the inside one.
Further, above-mentioned diagonal brace steel pipe connects the space enclosing structure of side in the orthography of horizontal plane perpendicular to it.
As preferably, above-mentioned described diagonal brace steel pipe is the steel pipe that building superstructure steel pipe column is used.After basement construction is finished, remove those diagonal brace steel pipes and also process slightly, promptly can be used as steel pipe column and be used for the building superstructure.
As preferably, described basement all around protection structure is a diaphragm wall.
The present invention is by adopting said method and supporting and protection structure, under the situation of negative two floor plated constructions of need not all constructing, can guarantee that still enough horizontal support rigidity makes basement negative two layers and negative three layers of earthwork can realize adopting large-scale backacter once to excavate, thereby accelerated basement soil excavation progress greatly, obtained remarkable economic efficiency and social benefit.
Description of drawings
Fig. 1 is the plane arrangement structure schematic diagram of supporting and protection structure of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to the structure sectional view.
Among the figure:
The 1-diaphragm wall; One of the negative two layers of basement periphery of 2-are striden floor; The intermediate support steel pipe column of 3-interior of building; 4-diagonal brace steel pipe; The 5-hand excavated pile; 6-± 0.000 floor plated construction; 7-bears the first floor plated construction; 8--2.700m absolute altitude; 9-bears one deck underfloor 2.40m position; 10-bears two layers of underfloor 2.40m position; The 11-basement bottom board; 12-is the soil excavation scope for the first time; 13-is the soil excavation scope for the second time; 14-the 3rd, the 4th earthwork merge the excavation scope; Earth excavation behind the 15-; One node of striding between floor limit and the steel pipe column of the negative two layers of basement periphery of A-; The negative one deck of B-is striden the node place that floor and steel pipe column form toward the inside one.
Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:
The specific embodiment
As depicted in figs. 1 and 2, present embodiment is three layers of basement that are applied to adopt reverse construction.Before implementing the present invention, the reverse construction of building basement is in proper order:
1, earlier along the diaphragm wall 1 of constructing of building basement, arranges hand excavated pile 5 and interior of building intermediate support steel pipe columns 3 in the center and the positions such as longitudinal and transverse frame beams and shear wall intersection of building basement post simultaneously on every side;
2, the earthwork 12 is excavated to-2.700m absolute altitude 8 construction ± 0.000 floor plated construction 6;
3, the earthwork 13 is excavated to negative one deck underfloor 2.40m position 9, the negative first floor plated construction 7 of construction.
Because the horizontal support problem of diaphragm wall when existing reverse construction system utilizes the first floor plated construction of having constructed to solve down one deck soil excavation, therefore negative two layers and bear three layers soil excavations and also will be undertaken by above-mentioned steps 3.So; when need are born three layers of soil excavation; with regard to the existence because of negative two floor plated constructions the headway of soil excavation can't being satisfied adopts large and medium-sized backacter to carry out excavation and construction; and can only adopt artificial or the mini-excavator shoveling, this will cause construction speed to become very slow.For this reason, after the negative first floor plated construction 7 of having constructed, adopt the present invention to increase the top-down method earth excavation space, concrete construction sequence is:
1) after the negative first floor plated construction 7 of having constructed, the earthwork 14 is excavated to negative two layers of underfloor 2.40m position 10, only construction is striden floor 2 along one of basement periphery for negative two layers then;
2) one stride node A between floor 2 limits and the steel pipe column 3 and negative one deck and stride toward the inside one between the Node B that floor and steel pipe column 3 form diagonal brace steel pipe 4 is set at this; Can adopt large-scale backacter to carry out the earthwork 14 in negative two layers and negative three layers of centre position of disposable excavation in diagonal brace steel pipe 4 setting up procedure, but the earthwork 15 that needs to reserve negative three layers of diaphragm wall periphery is not excavated;
3) after 4 constructions of above-mentioned diagonal brace steel pipe are finished, adopt large-scale backacter to continue the earthwork 14 of negative two layers and negative three layers of excavation, comprise the earthwork 15 of reservation.In the digging process, lateral pressure from diaphragm wall will be striden floor 2 by one of negative two layers of construction earlier earlier, be delivered to negative first floor plated construction 7 by diagonal brace steel pipe 4 again, thereby form mutually to the top braced structures, the horizontal support problem of diaphragm wall at the bottom of should replacing negative two floor plated constructions to solve to the top braced structures mutually from negative one deck to basement bottom board, thereby realize two-layer cubic metre of earth of disposable excavation, accelerate basement soil excavation progress greatly;
4) after cubic metre of earth 14,15 excavations are finished, earlier basement bottom board 11 is carried out the back cover construction, bear two layers of remainder floor slab structure construction again, just remove diagonal brace steel pipe 4 at last.
Above-mentioned mutually to the top braced structures in, each diagonal brace steel pipe 4 connects the diaphragm wall of side in the orthography of horizontal plane perpendicular to it.And, the steel pipe that diagonal brace steel pipe 4 should use building superstructure steel pipe column to use.After basement construction is finished, remove those diagonal brace steel pipes and also process slightly, promptly can be used as steel pipe column and be used for the building superstructure.
In conjunction with above description, supporting and protection structure of the present invention, mainly by the intermediate support steel pipe column of diaphragm wall, interior of building, ± 0.000 floor plated construction, negative first floor plated construction, stride floor and some diagonal brace steel pipes are formed along one of negative two layers of basement periphery construction earlier.This supporting and protection structure is applied in the basement deep foundation ditch, can effectively solve the level and the vertical support problem of basement deep foundation ditch, and can provide enough big construction space for adopting the disposable excavation of large-scale backacter negative two layers and negative three layers of earthwork.

Claims (8)

1. increase the method in basement top-down method earth excavation space, be to be applied to construct to be formed with comprise basement protection structure all around, the intermediate support steel pipe column, the basement foundation ditch of the support system of ± 0.000 floor plated construction and negative first floor plated construction, it is characterized in that: construction is earlier striden floor along one of basement periphery for negative two layers, extremely bear the steel pipe column that one deck is striden toward the inside one with steel pipe from this upward support of steel pipe column of striding the floor limit again, formation can with basement all around the lateral pressure that transmits of protection structure earlier by negative two layers of floor of construction earlier, again by this diagonal brace steel pipe pass to negative one deck floor mutually to the top braced structures, thereby form the space of enough once excavating two-layer cubic metre of earth.
2. method according to claim 1 is characterized in that: described diagonal brace steel pipe connects the space enclosing structure of side in the orthography of horizontal plane perpendicular to it.
3. method according to claim 1 is characterized in that: described diagonal brace steel pipe is the steel pipe that building superstructure steel pipe column is used.
4. method according to claim 1 is characterized in that: described basement all around protection structure is a diaphragm wall.
5. supporting and protection structure, comprise basement all around protection structure, interior of building the intermediate support steel pipe column, ± 0.000 floor plated construction and negative first floor plated construction, it is characterized in that: also comprise along one of negative two layers of basement periphery construction and stride floor, and some diagonal brace steel pipes, one end of diagonal brace steel pipe is supported in the node place that one of negative two layers of periphery are striden floor limit and steel pipe column formation, and the other end is supported in negative one deck and strides the node place that floor and steel pipe column form toward the inside one.
6. supporting and protection structure according to claim 5 is characterized in that: described diagonal brace steel pipe connects the space enclosing structure of side in the orthography of horizontal plane perpendicular to it.
7. supporting and protection structure according to claim 5 is characterized in that: described diagonal brace steel pipe is the steel pipe that building superstructure steel pipe column is used.
8. supporting and protection structure according to claim 5 is characterized in that: described basement all around protection structure is a diaphragm wall.
CN2009100374032A 2009-02-25 2009-02-25 Method and supporting construction for enlarging basement top-down method earth excavation space Active CN101498133B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321231B (en) * 2013-06-10 2015-11-25 叶长青 Base pit stand construction
CN104131579A (en) * 2014-05-27 2014-11-05 中国建筑第四工程局有限公司 Method for quickening earthwork digging and transporting in top-down construction
CN106193120B (en) * 2016-08-26 2018-04-06 杭州江润科技有限公司 Basement is encorbelmented, and bottom plate is inverse to make structure and construction method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101117805A (en) * 2007-08-22 2008-02-06 浙江大学 Underground engineering one-pile multi-use semi reverse construction method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101117805A (en) * 2007-08-22 2008-02-06 浙江大学 Underground engineering one-pile multi-use semi reverse construction method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李英姿.高层建筑地下室逆作法施工综合技术探讨.广东建材.2008,(7), *

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Address after: 510075, Guangdong, Guangzhou Yuexiu District Ring East Road, No. 476, 10-17 layers

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Patentee before: GUANGZHOU RESIDENTIAL CONSTRUCTION DEVELOPMENT Co.,Ltd.

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