CN102493487B - Method for constructing foundation slab embedded with concrete supports - Google Patents
Method for constructing foundation slab embedded with concrete supports Download PDFInfo
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- CN102493487B CN102493487B CN201110415286.6A CN201110415286A CN102493487B CN 102493487 B CN102493487 B CN 102493487B CN 201110415286 A CN201110415286 A CN 201110415286A CN 102493487 B CN102493487 B CN 102493487B
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Abstract
The invention discloses a method for constructing a foundation slab embedded with concrete supports, which comprises the following steps of: digging to the bottommost support surface of soil body, binding support reinforcing steel bars, and embedding foundation slab joint bars; arranging an isolating layer between surrounding purlines and a building envelope; arranging a water stopping structure at a place, which is close to the building envelope, of the support; after binding of the support reinforcing steel bars is finished and pre-embedded parts are embedded, pouring the concretes; after the supports are maintained to the required strength, digging to the bottom of the soil body, pouring plain concretes as a cushion layer, building a bracket for the foundation slab reinforcing steel bars, binding the foundation slab reinforcing steel bars, and connecting a sleeve with the pre-embedded foundation slab reinforcing steel bars on the supports; and pouring foundation slab concretes so as to embed the concrete supports in the foundation slab. The method disclosed by the invention can effectively reduce the length of the end, which has no support cantilever, of the lower part of a retaining wall, thereby preventing demolishing and slag removal works of the bottommost support, facilitating deformation control of foundation pits as well as material saving, and accelerating construction speed of the foundation slab.
Description
Technical field
The invention belongs to building underground construction technical field, relate to a kind of sole plate construction method, be specifically related to a kind of method for constructing foundation slab embedded with concrete supports that is positioned at sole plate absolute altitude for super thick sole plate construction, particularly bottom together support.
Background technology
The conventional way of sole plate construction is after bottom slab concreting, then supporting removal.When sole plate is super when thick, bottomly support and be positioned at floor level together, according to conventional way, after bed course is built, need be one of bottom supporting removal, then carry out bottom slab concreting.Now, because retaining wall bottom is long without supporting cantilever end, be unfavorable for the Deformation control of foundation ditch.In addition, the dismounting of supporting and scarfing cinder, be also unfavorable for material-saving and waste duration.In sum, while adopting the super thick sole plate of current conventional sole plate construction method construction, the Deformation control ability of foundation ditch a little less than, be unfavorable for material-saving, and speed of application is slow.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method for constructing foundation slab embedded with concrete supports, with solve at present super thick sole plate construction retaining wall bottom cantilever end long, be unfavorable for deformation control of foundation pit, be unfavorable for material-saving, the problem such as speed of application is slow.
The technical scheme of technical solution problem of the present invention is as follows:
A method for constructing foundation slab embedded with concrete supports, is characterized in that: comprise the steps:
(1) soil body digs to bottom and supports together, and colligation bearing bar, and pre-buried base plate joint bar are kept somewhere mechanical splice, when sole plate reinforcement construction, are connected with sole plate reinforcing bar;
(2) support while enclosing purlin construction, separation layer is set enclosing between purlin and space enclosing structure, make to enclose purlin and space enclosing structure relative separation, vertically can free settling;
(3) in support, near space enclosing structure position, water-stopping structure is set;
(4) bearing bar colligation completes, and buries underground after built-in fitting, carries out concreting;
(5) support maintenance and reach after intensity, excavation last batch of soil, to substrate, is built plain concrete cushion layer, carries out pile crown processing;
(6) after tanking is laid, set up sole plate Steel bar rack, and carry out base plate steel bar binding, sleeve connects the upper reserved baseplate reinforcing bar of support;
(7) base plate side form and dell template are set up, and joint bar, hole to be provided, built-in fitting are arranged;
(8) pump line is arranged, builds underplate concrete, and maintenance.
From above disclosed technical scheme, the present invention, by having designed the construction method of the embedded base plate of concrete support, is embedded into bottom one concrete support in sole plate, makes to support and base plate acting in conjunction.Thereby can effectively reduce retaining wall bottom without supporting cantilever end length, avoid bottom dismounting and the scarfing cinder operation of supporting together, be conducive to deformation control of foundation pit, be conducive to material-saving, and accelerated the speed of application of sole plate.
Accompanying drawing explanation
Fig. 1 is the embedded sole plate one embodiment longitudinal profile schematic diagram of concrete support of the present invention;
Fig. 2 is that the present invention supports and encloses purlin insulation layer structure schematic diagram;
Fig. 3 is the embedded sole plate waterproofing node of concrete support of the present invention figure;
Fig. 4 is that the present invention supports reserved joint bar schematic diagram.
Reference numeral is as follows:
1, sole plate 2, tetra-roads supports 3, plain concrete cushion layer
4, space enclosing structure 5, separation layer 6, waterproof construction
7, tri-roads support 8, support and enclose purlin 601, steel plate for sealing water
602, water stopping trough 603, water-swellable sealing rod 604, waterproof platform
9, pre-buried base plate joint bar 10, reinforcing rib
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Specific embodiment, as the sole plate construction on certain shipping square, because sole plate is super thick, main building region base plate thickness reaches 5.0m, and the concrete continuous cast scale of construction is large, and bottom support together, and namely Si road concrete support is positioned at floor level.If adopt conventional construction method, first build bed course, then remove Si road and support, finally build base plate, retaining wall bottom reaches 6.35m without supporting cantilever end so, unfavorable to deformation control of foundation pit, and speed of application is slow.
As shown in Fig. 1～4, adopt method for constructing foundation slab embedded with concrete supports of the present invention, its step is as follows:
(1) soil body digs Zhi tetra-roads and supports 2, colligation bearing bar, and pre-buried base plate joint bar 9, keep somewhere I level mechanical splice, when sole plate reinforcement construction, be connected with sole plate reinforcing bar, and for avoiding the pre-buried deviation that occurs of reinforcing bar, except requiring according to design reinforcement, accurately locate embedded bar, how pre-buried 2～3 reinforcing bars of each direction, the problems such as misplace of rebars that cause to tackle pre-buried deviation and reinforcing bar binding deviation;
(2) support while enclosing purlin 8 construction, in support, enclose purlin 8 with 4 of space enclosing structures arrange separation layer 5, make to support and enclose purlin 8 and space enclosing structure 4 relative separations, vertically can free settling;
(3) for strengthening base plate waterproof effect, supports in tetra-roads 2, near space enclosing structure 4 positions, water-stopping structure 6 is set; The circle steel plate for sealing water 601 that described water-stopping structure 6 is buried underground for support together the end of nearly space enclosing structure in bottom.Described bottom is supported the waterproof platform 604 that is provided with a circle projection together, and described steel plate for sealing water 601 is embedded in waterproof platform 604.The height of described waterproof platform 604 is 100～200mm, and the height that described steel plate for sealing water 601 stretches out waterproof platform 604 is 100～200mm.The concrete support surface in described steel plate for sealing water 601 outsides arranges a circle water stopping trough 602, establishes water-swellable sealing rod 603 in groove.The width of described water stopping trough 602 is 40～60mm, and the degree of depth is 20～30mm.
(4) bearing bar colligation completes, and buries underground after built-in fitting, carries out concreting; For guaranteeing that sole plate Yu tetra-roads support the combination ， tetra-roads support 2 employing concrete identical with sole plate 1 grating of new-old concrete.
(5) Si road supports 2 maintenances and reaches after intensity, and excavation last batch of soil, to substrate, is built 200mm plain concrete cushion layer, carries out pile crown processing; In order to make, new-old concrete is better must do surface " peeling " dabbing processing in conjunction with ， tetra-roads supports 2, and dabbing severity control is at 4～6mm, and dabbing spacing is 8～12mm, and the dabbing degree of depth of the present embodiment is at 5mm, and dabbing spacing is 10mm; Stayed surface dabbing can be carried out after support is built 12 hours.After cushion construction, carry out again the work of support base dabbing, and the fragment under cutter is removed clean.
(6) after tanking is laid, set up sole plate Steel bar rack, and carry out base plate steel bar binding, sleeve connects the pre-buried baseplate reinforcing bar 9 on supporting;
(7) base plate side form and dell template are set up, and joint bar, hole to be provided, built-in fitting are arranged;
(8) pump line is arranged, builds underplate concrete, and maintenance.
The foregoing is only preferred embodiments of the present invention, be not used for limiting the scope of the invention, every equal conversion of doing according to the claims in the present invention, all within protection scope of the present invention.
Claims (9)
1. a method for constructing foundation slab embedded with concrete supports, is characterized in that: comprise the steps:
(1) soil body digs one supporting surface to bottom, and colligation bearing bar, and pre-buried base plate joint bar are kept somewhere mechanical splice, when sole plate reinforcement construction, are connected with sole plate reinforcing bar;
(2) support while enclosing purlin construction, separation layer is set enclosing between purlin and space enclosing structure, make to enclose purlin and space enclosing structure relative separation, vertically can free settling;
(3) in support, near space enclosing structure position, water-stopping structure is set;
(4) bearing bar colligation completes, and buries underground after built-in fitting, carries out concreting;
(5) support maintenance and reach after intensity, excavation last batch of soil, to substrate, is built plain concrete cushion layer, carries out pile crown processing;
(6) after tanking is laid, set up sole plate Steel bar rack, and carry out base plate steel bar binding, sleeve connects the upper reserved baseplate reinforcing bar of support;
(7) base plate side form and dell template are set up, and joint bar, hole to be provided, built-in fitting are arranged;
(8) pump line is arranged, builds underplate concrete, and maintenance.
2. method for constructing foundation slab embedded with concrete supports according to claim 1, is characterized in that: described bottom is supported together and adopted the concreting identical with sole plate grating.
3. method for constructing foundation slab embedded with concrete supports according to claim 1, is characterized in that: the circle steel plate for sealing water that described water-stopping structure is buried underground for support together the end of nearly space enclosing structure in bottom.
4. method for constructing foundation slab embedded with concrete supports according to claim 3, is characterized in that: described bottom is supported the waterproof platform that is provided with a circle projection together, and described steel plate for sealing water is embedded in waterproof platform.
5. method for constructing foundation slab embedded with concrete supports according to claim 4, is characterized in that: the height of described waterproof platform is 100～200mm, and the height that described steel plate for sealing water stretches out waterproof platform is 100～200mm.
6. method for constructing foundation slab embedded with concrete supports according to claim 3, is characterized in that: the concrete support surface in described steel plate for sealing water outside arranges a circle water stopping trough, establishes water-swellable sealing rod in groove.
7. method for constructing foundation slab embedded with concrete supports according to claim 6, is characterized in that: the width of described water stopping trough is 40～60mm, and the degree of depth is 20～30mm.
8. method for constructing foundation slab embedded with concrete supports according to claim 1, is characterized in that: described bottom is supported together and done surface " peeling " dabbing processing.
9. method for constructing foundation slab embedded with concrete supports according to claim 8, it is characterized in that: the described dabbing degree of depth is 4～6mm, dabbing spacing is 8～12cm, and stayed surface dabbing can be carried out after support is built 12 hours, carries out support base dabbing after cushion construction again.
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| CN201110415286.6A CN102493487B (en) | 2011-12-13 | 2011-12-13 | Method for constructing foundation slab embedded with concrete supports |
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| CN201110415286.6A CN102493487B (en) | 2011-12-13 | 2011-12-13 | Method for constructing foundation slab embedded with concrete supports |
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| CN102493487B true CN102493487B (en) | 2014-02-26 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104514228A (en) * | 2013-09-29 | 2015-04-15 | 浙江宝业建设集团有限公司 | Large-chassis multi-tower building construction method and structure |
| CN104088296B (en) * | 2014-06-24 | 2016-02-10 | 上海市城市建设设计研究总院 | Soft clay area basement adds a layer construction method |
| CN104120740B (en) * | 2014-08-11 | 2015-07-08 | 广西壮族自治区冶金建设公司 | Construction method for basement construction bottom plate |
| CN104975607A (en) * | 2015-07-22 | 2015-10-14 | 中建八局第二建设有限公司 | Offshore area local deep foundation pit stanching pit construction method |
| CN105887888A (en) * | 2016-04-13 | 2016-08-24 | 上海建工建集团有限公司 | Layered and fast construction method for foundation pit bottom plate |
| CN108677963B (en) * | 2018-05-23 | 2024-06-21 | 中铁第四勘察设计院集团有限公司 | Steel support stay joint structure for foundation pit engineering and construction method thereof |
| CN113445533A (en) * | 2021-07-07 | 2021-09-28 | 上海建工一建集团有限公司 | Construction method of concrete support embedded bottom plate and support and bottom plate node connecting piece |
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| JP2006083610A (en) * | 2004-09-16 | 2006-03-30 | Shimizu Corp | Inverted construction method |
| CN101117800A (en) * | 2007-08-22 | 2008-02-06 | 浙江大学 | Method for one-pile-three-use in underground engineering |
| CN101117805A (en) * | 2007-08-22 | 2008-02-06 | 浙江大学 | Underground engineering one-pile multi-use semi reverse construction method |
| CN101718094A (en) * | 2009-11-10 | 2010-06-02 | 朱奎 | Construction method for retaining and protecting foundation pit of building with basemen |
| CN102031785A (en) * | 2009-09-24 | 2011-04-27 | 上海市第一建筑有限公司 | Foundation pit supporting technique for replacing temporary enclosing purlin by using plate belt of permanent structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2885090B2 (en) * | 1994-09-28 | 1999-04-19 | 鹿島建設株式会社 | Construction method of the head of the retaining wall which also serves as the underground external wall of the permanent structure in the reverse-casting method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083610A (en) * | 2004-09-16 | 2006-03-30 | Shimizu Corp | Inverted construction method |
| CN101117800A (en) * | 2007-08-22 | 2008-02-06 | 浙江大学 | Method for one-pile-three-use in underground engineering |
| CN101117805A (en) * | 2007-08-22 | 2008-02-06 | 浙江大学 | Underground engineering one-pile multi-use semi reverse construction method |
| CN102031785A (en) * | 2009-09-24 | 2011-04-27 | 上海市第一建筑有限公司 | Foundation pit supporting technique for replacing temporary enclosing purlin by using plate belt of permanent structure |
| CN101718094A (en) * | 2009-11-10 | 2010-06-02 | 朱奎 | Construction method for retaining and protecting foundation pit of building with basemen |
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Address after: 200120 Shanghai city Pudong New Area Fushan Road No. 33 Applicant after: Shanghai Construction No.1 (Group) Co., Ltd. Address before: 200120 Shanghai city Pudong New Area Fushan Road No. 33 Applicant before: Shanghai First Construction Co., Ltd. |
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