CN103103988A - Foundation ditch construction method of horizontal bracing structure of central island floor slaps - Google Patents

Foundation ditch construction method of horizontal bracing structure of central island floor slaps Download PDF

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Publication number
CN103103988A
CN103103988A CN2013100261153A CN201310026115A CN103103988A CN 103103988 A CN103103988 A CN 103103988A CN 2013100261153 A CN2013100261153 A CN 2013100261153A CN 201310026115 A CN201310026115 A CN 201310026115A CN 103103988 A CN103103988 A CN 103103988A
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CN
China
Prior art keywords
floor
horizontal support
foundation ditch
central island
construction
Prior art date
Application number
CN2013100261153A
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Chinese (zh)
Inventor
蔡敏
束冬青
李彪
单灿灿
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安徽省城建设计研究院
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Application filed by 安徽省城建设计研究院 filed Critical 安徽省城建设计研究院
Priority to CN2013100261153A priority Critical patent/CN103103988A/en
Publication of CN103103988A publication Critical patent/CN103103988A/en

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Abstract

The invention discloses a foundation ditch construction method of a horizontal structure of central island floor slaps. The method comprises the following steps: constructing an envelope enclosure on the side wall of the foundation ditch; excavating the earthwork of the middle portion of the foundation ditch to the bottom and naturally carrying out the construction to plus-minus zero to form the central island structure; leaving a soil slope on the foundation ditch except for the central island structure; arranging supporting seats and the horizontal supporting structures on the edges of the floor slaps of the plus-minus zero layer from the floor slaps of the central island to floor slaps of the foundation ditch bottom layer in sequence, and fixing one end of the horizontal supporting structure on each supporting seat and fixing the other end of the horizontal supporting structure on the envelope enclosure structure and evacuating the soil slope which is under the horizontal supporting structure arranged by the floor slaps of the layer to the bottom elevation of the horizontal supporting structure of the next layer of floor slaps; and constructing naturally the surrounding areas to the plus-minus zero. The foundation ditch construction method of the horizontal bracing structure of central island floor slaps has the advantages that the central island floor slaps are used for adding horizontal supportings to the surrounding envelope enclosure structures. Compared with the existing steel inclined sturts which are used frequently, horizontal stiffness is improved, supporting atress is more clear, the deformation of the foundation ditch can be better controlled and safety is increased.

Description

Utilize the foundation ditch construction method of central island floor horizontal support structure
Technical field
The present invention relates to a kind of foundation ditch construction method that utilizes central island floor horizontal support structure, be mainly used in the technical field of building operations.
Background technology
At present, what the job practices of foundation ditch was commonly used is " method of center island ", and " method of center island " foundation pit supporting method of domestic employing is divided into two kinds: 1. peripheral structure is contrary to be done central island along doing; 2. central island is along making peripheral structure along doing.Wherein, method 1 construct from top to bottom to the positive negative zero at the central island structure construction peripheral underground structure beam slab or beam lattice and it is supported on the foundation pit side-wall space enclosing structure; Method 2 namely applies the temporary steel diagonal brace from base plate to peripheral space enclosing structure after the construction of central island structure base slab is complete.The soil excavation of above method is " basin excavation ", i.e. the first excavation pit middle part earthwork, and periphery one circle keeps slight slope, and the basement structure of this slight slope scope is excavated after structure floor, beam or temporary steel diagonal brace are implemented again.There are the following problems for technology at present:
1. method 1 utilizes structure beam slab or beam lattice to be the contrary work of peripheral structure as peripheral horizontal support, first there are a large amount of constuction joints between the outer wall of basement of structural beams, plate and the rear construction of construction, post, complicated construction technique, work efficiency is low, the waterproof technique difficulty is large, and the later stage easily produces infiltration; As the beam slab that utilizes peripheral structure during as horizontal support peripheral soil excavation need take cap excavation method, difficulty of construction is larger.
2. method 2 applies the temporary steel diagonal brace and is peripheral structure along doing from base plate to surrounding, it is relatively relatively poor that diagonal brace is controlled deformability, and greatly increased the difficulty of cutting the earth after applying diagonal brace, because plant equipment can't be excavated the diagonal brace below soil body, must coordinate a large amount of hand excavations, cause the construction effect greatly to reduce and be difficult to the strict distortion of controlling.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of foundation ditch construction method that utilizes central island floor horizontal support structure, improve the work efficiency of supporting construction under the prerequisite that has good control deformability, more be convenient to the perimeter body structure construction, solve the waterproofing work difficult problem of present technology.
The present invention is achieved through the following technical solutions.
A kind of foundation ditch construction method that utilizes central island floor horizontal support structure comprises step:
(1) above-mentioned foundation pit side-wall builds space enclosing structure;
(2) in the middle part of above-mentioned foundation ditch, soil excavation on earth also along making extremely just negative zero of construction, forms the central island structure;
(3) slight slope is stayed in the surrounding zone of above-mentioned foundation ditch except above-mentioned central island mechanism;
(4) by the positive negative zero floor of above-mentioned central island plate to above-mentioned foundation ditch bottom floor, in floor edge, bearing is set successively, horizontal support structure one end is set is fixed on above-mentioned bearing, the other end is fixed on above-mentioned space enclosing structure, and, the slight slope of the horizontal support structure below of excavating that this floor plate arranges absolute altitude at the bottom of the horizontal support structure of lower first floor plate;
(5) along doing the surrounding zone to positive negative zero.
Further, above-mentioned bearing comprises and turns over beam, haunched beam, and above-mentioned haunched beam is fixed on the floor upper surface, and coaxial with above-mentioned horizontal support structure, turns over beam perpendicular to above-mentioned horizontal support and fixing above-mentioned horizontal support structure on above-mentioned.
Further, above-mentioned bearing and be positioned at above-mentioned bearing and above-mentioned horizontal support structure bearing is provided with the link of reservation.
Further, above-mentioned horizontal support structure material is steel concrete.
Further, above-mentioned link is anchor rib.
Further, above-mentioned horizontal support structure material is any a kind of in real abdomen shaped steel, lattice shaped steel, steel pipe.
Further, above-mentioned link is the steel plate built-in fitting.
Further, above-mentioned space enclosing structure is provided with Guan Liang at positive negative zero place, and the horizontal support structure of the positive negative zero floor of above-mentioned central island plate is fixed on above-mentioned Guan Liang.
Further, above-mentioned space enclosing structure is provided with waist rail at the horizontal support structure place of non-positive negative zero and corresponding every floor plate, and the horizontal support structure of above-mentioned every floor plate is fixed on corresponding waist rail.
Beneficial effect of the present invention:
1, the present invention utilizes the central island floor to apply horizontal support to peripheral space enclosing structure, compares with steel diagonal brace commonly used at present and has promoted horizontal rigidity, and it is stressed also more clear to support, and can control better foundation pit deformation, has improved safety;
2, the horizontal support structure that adopts of the present invention, avoided the lid of peripheral structure contrary sequence method dig can't be in place with temporary steel diagonal brace below plant equipment a difficult problem, be convenient to the soil excavation that periphery stays the soil zone, promoted construction efficiency;
3, the present invention is by the bearing in the edge setting of central island floor, make horizontal support structure all be positioned at the top of central island floor, can carry out backfill or support replacement after floor slab construction below support is complete, then remove horizontal support structure, avoid a large amount of constuction joints and temporary steel diagonal brace that the peripheral structure contrary sequence method causes to wear the seepage problem that basement side wall plate etc. brings, solved the waterproof difficult problem of present technology.
Description of drawings
Structural profile schematic diagram when the central island that Fig. 1 provides for case study on implementation 1 is main building;
Structural profile schematic diagram when the central island that Fig. 2 provides for case study on implementation 2 is basement;
The pattern foundation pit supporting structure floor map that Fig. 3 provides for case study on implementation 1;
The structural representation of the bearing that Fig. 4 provides for case study on implementation 1;
The structural representation of the bearing that Fig. 5 provides for case study on implementation 2.
The specific embodiment
The below is described in further detail the present invention according to drawings and embodiments.
Case study on implementation 1:
Structural profile schematic diagram when the central island that Fig. 1 provides for case study on implementation 1 is main building, the pattern foundation pit supporting structure floor map that Fig. 3 provides for case study on implementation 1, with reference to Fig. 1, Fig. 3, plan to build agent structure in the foundation ditch of case study on implementation 1 two main buildings and underground two layer garages are arranged, excavation of foundation pit degree of depth 10m, surrounding enviroment are complicated, and are strict to deformation control of foundation pit.Pattern foundation pit supporting structure adopts " method of center island ", applies the two horizontal supporting layers structure to space enclosing structure from the central island floor.
Space enclosing structure 1 adopts campshed, and fender post adopts 800mm diameter bored pile, forms at a certain distance piling structure, and stake is connected by hat beam 2 with stake, forms the campshed space enclosing structure.Stand column pile 4 adopts 800mm diameter bored pile, and temporary steel column 5 adopts the 500mmx500mm steel lattice column, is welded by 4 angle steel and steel batten plate.Turn over beam 13 on the bearing 7 that is arranged on central island floor top is elongated by one and be arranged at the coaxial haunched beam 14 of support point place and horizontal support structure 9 and form.
The structural representation of the bearing that Fig. 4 provides for case study on implementation 1, with reference to Fig. 4, and in conjunction with Fig. 1, the constructions that are in island centered by main building due to bearing 7 herein, therefore haunched beam 14 is in the practice that adopts the cuboid structure, on turn over beam section and be of a size of 300mmx600mm, haunched beam 300mm is wide, height 500mm ~ 0mm.Waist rail 8 is the reinforced concrete cast-in-situ beam, and sectional dimension is 600mmx500mm.Horizontal support structure 9 is that the up and down is two-layer, adopts cast-in-situ steel reinforced concrete to support, and supporting section is of a size of 600mmx600mm, spacing 4050mm.
The job practices of case study on implementation 1 is:
1) at slope end face 11 construction foundation pit sidewall space enclosing structures 1 and hat beam 2;
2) stay stand column pile 4 and the temporary steel column 5 of native scope at slope end face 11 construction foundation pit peripheries;
3) keep periphery and stay slight slope 3, the middle part soil excavation is on earth and along making construction central island structure 6, and as Fig. 4 bearing 7 of constructing;
4) the positive negative zero floor plate from central island structure 6 applies first floor horizontal support structure 9 to space enclosing structure 1, horizontal support structure 9 two ends be separately fixed at steel concrete make 7 and hat beam 2 on;
5) periphery of excavation horizontal support structure 9 belows stays slight slope 3 to second layer horizontal support structure 9 end absolute altitude;
6) at the inboard construction reinforced bar concrete breast beam 8 of space enclosing structure 1;
7) the negative one deck floor from central island structure 6 applies second layer horizontal support structure 9 to space enclosing structure 1, horizontal support structure 9 two ends be separately fixed at steel concrete make 7 and waist rail 8 on;
8) periphery of excavation horizontal support structure 9 belows stays slight slope 3 to bottom surface, slope 12;
9) along making the peripheral basement structure 10 of construction to negative one deck floor face;
10) the backfill earthwork is to negative one deck floor absolute altitude;
11) remove second layer horizontal support structure 9;
12) along making the peripheral basement structure 10 of construction to positive negative zero floor face;
13) the backfill earthwork to positive negative zero floor absolute altitude, is removed first floor horizontal support structure 9.
In addition, when the material of horizontal support structure 9 is steel concrete, take to reserve anchor rib when building bearing 7, when secondary is built horizontal support structure 9, with the concrete surface dabbing of bearing 7 with horizontal support structure 9 contact portions, anchor rib anchors in horizontal support structure 9, realizes the reliable connection of node; When the material of horizontal support structure 9 is real abdomen shaped steel, lattice shaped steel or steel pipe, to take to stay when building steel concrete bearing 7 and establish steel plate built-in fitting 15, horizontal support structure 9 is welded to connect with the steel plate built-in fitting.
Case study on implementation 2:
Structural profile schematic diagram when the central island that Fig. 2 provides for case study on implementation 2 is basement, the structural representation of the bearing that Fig. 5 provides for case study on implementation 2, with reference to Fig. 2, Fig. 5, the difference of case study on implementation 1 and case study on implementation 2 is, central island in case study on implementation 2 is basement, and the structure of bearing 7 and case study on implementation 1 are slightly different, with reference to Fig. 5, bearing 7 is the constructions that are in island centered by basement, so haunched beam 14 is in the practice that adopts the trigone structure.
Remainder is identical with case study on implementation 1.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this art can understand content of the present invention and be implemented, and can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.

Claims (9)

1. a foundation ditch construction method that utilizes central island floor horizontal support structure, is characterized in that, comprises step:
(1) described foundation pit side-wall builds space enclosing structure;
(2) in the middle part of described foundation ditch, soil excavation on earth also along making extremely just negative zero of construction, forms the central island structure;
(3) slight slope is stayed in the surrounding zone of described foundation ditch except described central island mechanism;
(4) by the positive negative zero floor of described central island plate to described foundation ditch bottom floor, in floor edge, bearing is set successively, horizontal support structure one end is set is fixed on described bearing, the other end is fixed on described space enclosing structure, and, the slight slope of the horizontal support structure below of excavating that this floor plate arranges absolute altitude at the bottom of the horizontal support structure of lower first floor plate;
(5) along doing the surrounding zone to positive negative zero.
2. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 1, it is characterized in that, described bearing comprises and turns over beam, haunched beam, described haunched beam is fixed on the floor upper surface, and coaxial with described horizontal support structure, turn over beam on described perpendicular to described horizontal support and fixing described horizontal support structure.
3. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 1 and 2, is characterized in that, described bearing and be positioned at described bearing and described horizontal support structure bearing is provided with the link of reservation.
4. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 3, is characterized in that, described horizontal support structure material is steel concrete.
5. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 4, is characterized in that, described link is anchor rib.
6. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 3, is characterized in that, described horizontal support structure material is any a kind of in real abdomen shaped steel, lattice shaped steel, steel pipe.
7. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 6, is characterized in that, described link is the steel plate built-in fitting.
8. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 1, is characterized in that, described space enclosing structure is provided with Guan Liang at positive negative zero place, and the horizontal support structure of the positive negative zero floor of described central island plate is fixed on described Guan Liang.
9. the foundation ditch construction method that utilizes central island floor horizontal support structure according to claim 1, it is characterized in that, described space enclosing structure is provided with waist rail at the horizontal support structure place of non-positive negative zero and corresponding every floor plate, and the horizontal support structure of described every floor plate is fixed on corresponding waist rail.
CN2013100261153A 2013-01-21 2013-01-21 Foundation ditch construction method of horizontal bracing structure of central island floor slaps CN103103988A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103334439A (en) * 2013-06-06 2013-10-02 广西建工集团第五建筑工程有限责任公司 Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure
CN103541364A (en) * 2013-10-10 2014-01-29 上海申元岩土工程有限公司 Design and construction method of large area foundation pit deformation control with roundabout method
CN104563128A (en) * 2014-12-22 2015-04-29 上海建工集团股份有限公司 Synchronous excavation supporting system for deep and large asymmetric pit in soft soil area and implementation method of supporting system
CN104762974A (en) * 2015-03-18 2015-07-08 中天建设集团有限公司 Soil excavation method for increasing quantity of open excavated soil in reverse construction of foundation pit earthwork
CN105297773A (en) * 2015-10-30 2016-02-03 马鞍山十七冶工程科技有限责任公司 Reverse construction method earth excavation method capable of reducing cover-excavation earth volume
CN105951843A (en) * 2016-06-17 2016-09-21 中建八局第建设有限公司 Construction method of deep foundation pit
CN106894424A (en) * 2017-03-03 2017-06-27 周同和 A kind of short branch supporting system of basin excavation and its construction technology
CN107178088A (en) * 2017-04-18 2017-09-19 武汉志和岩土工程有限公司 A kind of basement waterproofing foundation pit structure and its construction method
CN110777846A (en) * 2019-10-22 2020-02-11 中国建筑第八工程局有限公司 Local reverse construction soil matrix construction method for high-rise residential buildings

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CN2835351Y (en) * 2005-10-14 2006-11-08 浙江中成建工集团有限公司 Horizontal supporting structure for reinforced concrete loop truss in deep foundation pit
CN101294390A (en) * 2007-04-27 2008-10-29 上海市第五建筑有限公司 Support system and construction method for smoothening-digging partial center island foundation pit
CN201794079U (en) * 2010-09-26 2011-04-13 济南大学 Foundation pit supporting system
CN102425171A (en) * 2011-09-25 2012-04-25 湖南省勘测设计院 Forward-backward constructing method for central island of deep and large foundation pit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0598644A (en) * 1991-03-07 1993-04-20 Taisei Corp Advance strut construction method
CN1391013A (en) * 2002-07-25 2003-01-15 上海隧道工程股份有限公司 Technology building up diagonal space brace by reverse masonry method
CN2835351Y (en) * 2005-10-14 2006-11-08 浙江中成建工集团有限公司 Horizontal supporting structure for reinforced concrete loop truss in deep foundation pit
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CN102425171A (en) * 2011-09-25 2012-04-25 湖南省勘测设计院 Forward-backward constructing method for central island of deep and large foundation pit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103334439A (en) * 2013-06-06 2013-10-02 广西建工集团第五建筑工程有限责任公司 Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure
CN103334439B (en) * 2013-06-06 2015-06-24 广西建工集团第五建筑工程有限责任公司 Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure
CN103541364A (en) * 2013-10-10 2014-01-29 上海申元岩土工程有限公司 Design and construction method of large area foundation pit deformation control with roundabout method
CN104563128A (en) * 2014-12-22 2015-04-29 上海建工集团股份有限公司 Synchronous excavation supporting system for deep and large asymmetric pit in soft soil area and implementation method of supporting system
CN104563128B (en) * 2014-12-22 2016-10-05 上海建工集团股份有限公司 The asymmetric deep big foundation pit in soft clay area synchronizes support system and the implementation of excavation
CN104762974A (en) * 2015-03-18 2015-07-08 中天建设集团有限公司 Soil excavation method for increasing quantity of open excavated soil in reverse construction of foundation pit earthwork
CN105297773A (en) * 2015-10-30 2016-02-03 马鞍山十七冶工程科技有限责任公司 Reverse construction method earth excavation method capable of reducing cover-excavation earth volume
CN105951843A (en) * 2016-06-17 2016-09-21 中建八局第建设有限公司 Construction method of deep foundation pit
CN105951843B (en) * 2016-06-17 2019-02-15 中建八局第一建设有限公司 A kind of construction method of deep foundation ditch
CN106894424A (en) * 2017-03-03 2017-06-27 周同和 A kind of short branch supporting system of basin excavation and its construction technology
CN107178088A (en) * 2017-04-18 2017-09-19 武汉志和岩土工程有限公司 A kind of basement waterproofing foundation pit structure and its construction method
CN110777846A (en) * 2019-10-22 2020-02-11 中国建筑第八工程局有限公司 Local reverse construction soil matrix construction method for high-rise residential buildings

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