CN111549826A - Interception construction method for post-cast strip prefabricated formwork in raft of main building - Google Patents
Interception construction method for post-cast strip prefabricated formwork in raft of main building Download PDFInfo
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- CN111549826A CN111549826A CN202010288463.8A CN202010288463A CN111549826A CN 111549826 A CN111549826 A CN 111549826A CN 202010288463 A CN202010288463 A CN 202010288463A CN 111549826 A CN111549826 A CN 111549826A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention relates to a construction method for intercepting a post-cast strip prefabricated template in a raft of a main building, which comprises the following steps: s1: analyzing a drawing, and determining the positions and ranges of a post-cast strip and a construction joint; s2: constructing a waterproof protective layer return eave and plugging bottom steel bars; s3: prefabricating a finished reinforcing mesh sheet, and assembling and fixing the reinforcing mesh sheet on site; s4: welding a water stop steel plate and a triangular support; s5: adding a steel wire mesh and a lead wire mesh; s6: and (4) checking and accepting the raft board, pouring the raft board concrete when the raft board is qualified, and returning to the step S2 when the raft board is unqualified. According to the interception construction method for the prefabricated template of the post-cast strip in the main building raft, the post-cast strip construction joint is intercepted by adopting a mode that a steel bar net piece is additionally arranged on a steel wire mesh and a lead wire mesh, a template does not need to be additionally erected, and the template does not need to be disassembled and chiseled in the later stage, so that the material cost and the labor cost are saved.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a construction method for intercepting a prefabricated template of a post-cast strip in a raft of a main building.
Background
At present, with the rapid development of the building industry, more and more super high-rise buildings are pulled out. The super high-rise construction faces a plurality of construction difficulties which are not overcome, and how to solve the problems of post-cast strip and construction joint plugging of super thick raft plates becomes a difficult problem in the super high-rise construction process. For the positions of the post-cast strip and the construction joint of the raft plate with larger thickness of the super high-rise building, the rapid-easy closing-up net cannot be adopted for intercepting by a conventional method. And the traditional mode uses the plank sheathing formwork to consolidate the construction difficulty, often because consolidate insecurely, the problem of exploding the mould or leaking the thick liquid appears, and the plank sheathing is erect and is demolishd required time length, inefficiency simultaneously, causes the waste of a large amount of manpower and materials, and it is big to occupy the area during the construction, alternates to the flowing water of construction and causes very big difficulty. By contrast, the existing construction methods cannot simultaneously give consideration to quality requirements and control of cost and progress, and the construction method is specially constructed to provide a feasible construction mode for the problem.
Disclosure of Invention
The invention aims to provide a construction method for intercepting a post-cast strip prefabricated template in a raft of a main building, so as to solve the existing problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method for intercepting a post-cast strip prefabricated template in a raft of a main building comprises the following steps:
s1: analyzing a drawing, and determining the positions and ranges of a post-cast strip and a construction joint;
s2: constructing a waterproof protective layer return eave and plugging bottom steel bars;
s3: prefabricating a finished reinforcing mesh sheet, and assembling and fixing the reinforcing mesh sheet on site;
s4: welding a water stop steel plate and a triangular support;
s5: adding a steel wire mesh and a lead wire mesh;
s6: and (4) checking and accepting the raft board, pouring the raft board concrete when the raft board is qualified, and returning to the step S2 when the raft board is unqualified.
Preferably, in the step S1, conditions such as a reserved position, a length, and a range of the post-cast strip construction joint are determined according to drawing design requirements and an actual construction range, and a mark is left at the construction joint position during on-site construction setting-out positioning, so that a foundation is laid for a special method of a later-stage construction joint position.
Preferably, in the step S2, when the raft waterproof protective layer is constructed, in the position of the post-cast strip construction joint determined in advance, the fine aggregate concrete with the same mark number is used to be plastered to be 40mm high, the height is determined according to the thickness of the protective layer, the trapezoidal grout blocking platform with the width of 100mm below the upper 80mm is used, a reinforcing mesh with the height of 200mm is welded on the reinforcing steel bar at the bottom of the raft post-cast strip construction joint, and the bottom plugging is performed by using the quick and easy closing mesh.
Preferably, in the step S3, the reinforcing mesh sheets are prefabricated with HRB400 of 14mm in diameter and 150mm in spacing and 600mm × 1500mm in size, and the thickness and size of the raft can be appropriately adjusted according to the thickness and size of the raft, so that the weight of the single mesh sheet is convenient for the field construction, and the reinforcing mesh sheets are welded at the positions where the reinforcing bars intersect;
assembling prefabricated steel bar net sheets at the construction joint position of the casting belt, firstly installing lower layer steel bar net sheets and placing water stop steel plates, and welding the steel bar net sheets; the water stop steel plates and the reinforcing mesh are welded, the joints of the steel plates are welded, the lap joint length of the two steel plates is not less than 50mm, and both ends of the two steel plates are fully welded.
Preferably, in the step S4, a water stop steel plate is welded between the upper and lower layers of steel bar mesh sheets, after the water stop steel plate is welded, the upper layer of steel bar mesh sheets are installed, and the outer side of the post-cast strip is welded and fixed by using steel bar diagonal braces with the diameter of 16mm, so as to form a triangular support.
Preferably, in the step S5, the steel mesh sheets are used as a framework, a layer of steel mesh is bound on the framework, and a layer of densely-distributed lead wire mesh is attached to the steel mesh.
Preferably, in step S6, a strength verification calculation, a support reaction force calculation, and a deflection verification calculation are used.
Preferably, the raft board contains basic unit, bed course, waterproof layer and waterproof layer, high reinforcing bar net has been laid to the raft board upper surface, and high reinforcing bar net carries out the bottom shutoff with the net that easily closes up, one side of the net that easily closes up is provided with the anti-eaves of waterproof layer and bottom reinforcing bar welding point, and the welding has reinforcing bar net piece on the anti-eaves of waterproof layer and the bottom reinforcing bar welding point, welding stagnant water steel sheet between the reinforcing bar net piece, and a reinforcing bar net piece side ligature has the wire net, it has the lead wire net to attach on the wire net again, reinforcing bar net piece opposite side welding has the reinforcing bar triangular supports.
Compared with the prior art, the invention has the beneficial effects that: the interception construction method of the prefabricated template of the post-cast strip in the raft of the main building mainly comprises the steps of carrying out early deepening design according to construction drawings and design requirements, determining the position and the range of the post-cast strip, carrying out anti-eaves construction on a waterproof protective layer at the construction position, welding reinforcing steel bar end sockets for bottom plugging, then adopting the prefabricated reinforcing steel bar net piece as a framework, attaching a steel wire net and a lead wire net to the upper part of the reinforcing steel bar net piece to form a three-in-one interception system, simultaneously welding a water-stop steel plate in the middle of the upper layer of reinforcing steel bar net piece and the lower layer of reinforcing steel bar net piece to reduce the leakage risk of the construction joint, finally welding a triangular inclined strut at the outer side of the post-cast strip to improve the bearing capacity, adopting the construction method to carry out post-cast strip construction joint interception, greatly reducing the probability of mold explosion at the post-cast strip construction joint position in the concrete pouring process, saving a large amount of concrete, no additional template is required to be erected, and the later period is also not required to be disassembled and chiseled, so that the material cost and the labor cost are saved.
Drawings
Fig. 1 is a schematic structural view of a construction flow of the construction method for intercepting post-cast strip precast formworks in a raft of a main building;
FIG. 2 is a schematic diagram of a post-cast strip construction joint position special method of the post-cast strip precast formwork interception construction method in a raft of a main building of the invention;
fig. 3 is a schematic structural view of an assembly and fixing reinforcing mesh sheet of the construction method for intercepting the post-cast strip precast formwork in the raft of the main building;
fig. 4 is a schematic diagram of an overall structure of a post-cast strip precast formwork interception construction method in a raft of a main building after implementation.
In the figure: 1. raft board, 101, basic unit, 102, bed course, 103, waterproof layer, 104, waterproof layer, 2, high reinforcing bar net, 3, the net that easily closes up soon, 4, the anti eaves of waterproof layer and bottom reinforcing bar welding point, 5, reinforcing bar net piece, 6, stagnant water steel sheet, 7, wire net, 8, lead wire net, 9, reinforcing bar triangular supports.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a post-cast strip precast formwork interception construction method in main building raft board which characterized in that: the method comprises the following steps:
s1: analyzing a drawing, and determining the positions and ranges of a post-cast strip and a construction joint; according to the design requirements of a drawing and the actual construction range, conditions such as the reserved position, the length and the range of the post-cast strip construction joint are determined, marks are left at the construction joint position during the site construction setting-out positioning, and a foundation is laid for the special method of the later construction joint position.
S2: constructing a waterproof protective layer return eave and plugging bottom steel bars; when the raft waterproof protective layer is constructed, at the post-cast strip construction joint position of confirming in advance, adopt the same grade pea gravel concrete, smear into 40mm height, highly confirm according to protective layer thickness, go up 100mm wide trapezoidal fender thick liquid platform under the 80mm, weld 200mm high reinforcing bar net on the raft post-cast strip construction joint bottom reinforcing bar to adopt fast easy binding off net to carry out the bottom shutoff, prevent that raft bottom waterproof protective layer department from leaking thick liquid.
S3: prefabricating a finished reinforcing mesh sheet, and assembling and fixing the reinforcing mesh sheet on site; the reinforcing mesh sheets are made of HRB400 with the diameter of 14mm, the prefabricated interval of 150mm and the size of 600mm multiplied by 1500mm, the size can be properly adjusted according to the thickness of the raft, the installation weight of each mesh sheet is convenient for the reinforcing mesh sheets required by site construction, and the crossed positions of the reinforcing steel bars are welded; assembling prefabricated steel bar net sheets at the construction joint position of the casting belt, firstly installing lower layer steel bar net sheets and placing water stop steel plates, and welding the steel bar net sheets; the water stop steel plates and the reinforcing mesh are welded, the joints of the steel plates are welded, the lap joint length of the two steel plates is not less than 50mm, and both ends of the two steel plates are fully welded.
S4: welding a water stop steel plate and a triangular support; the middle of the upper layer of reinforcing steel bar net piece and the lower layer of reinforcing steel bar net piece are welded with the water stop steel plate, after the water stop steel plate is welded, the upper layer of reinforcing steel bar net piece is installed, and the outer side of the post-cast strip is welded and fixed by the reinforcing steel bar inclined strut with the diameter of 16mm to form a triangular support so as to improve the bearing capacity of the intercepting position.
S5: adding a steel wire mesh and a lead wire mesh; the steel bar net piece is used as a framework, a layer of steel wire mesh is bound on the framework, and a layer of densely distributed lead wire mesh is additionally arranged on the steel wire mesh and used as a main medium for concrete interception.
S6: the raft plate is inspected and accepted, the raft plate concrete pouring is carried out when the raft plate is qualified, and the step S2 is returned when the raft plate concrete pouring is unqualified; and the acceptance adopts strength checking calculation, support counter-force calculation and deflection checking calculation.
Further, the raft board contains basic unit, bed course, waterproof layer and waterproof layer, high reinforcing bar net has been laid to the raft board upper surface, and high reinforcing bar net carries out the bottom shutoff with the net that easily closes up, one side of the net that easily closes up is provided with the anti-eaves of waterproof layer and bottom reinforcing bar welding point, and welds the reinforcing bar net piece on the anti-eaves of waterproof layer and the bottom reinforcing bar welding point, welding stagnant water steel sheet between the reinforcing bar net piece, and a reinforcing bar net piece side ligature has the wire net, it has the lead wire net to attach on the wire net again, reinforcing bar net piece opposite side welding has the reinforcing bar triangular supports.
When in specific use: according to construction drawings and design requirements, early deepening design is carried out, the position and the range of a post-cast strip are determined, a grout blocking platform is constructed on the upper portion of a waterproof protective layer at the position of a construction joint according to the thickness of the protective layer, a fast and easy closing net is adopted at a steel bar gap for blocking, a bottom steel bar end socket is welded for blocking, then a prefabricated steel bar net piece is adopted as a framework, an eyelet steel wire net and a densely distributed lead wire net are attached to the upper portion of the steel bar net framework to form a three-in-one blocking system, meanwhile, a water-stopping steel plate is welded in the middle of the upper and lower steel bar net pieces to reduce the leakage risk of the construction joint, and finally a triangular,
although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a post-cast strip precast formwork interception construction method in main building raft board which characterized in that: the method comprises the following steps:
s1: analyzing a drawing, and determining the positions and ranges of a post-cast strip and a construction joint;
s2: constructing a waterproof protective layer return eave and plugging bottom steel bars;
s3: prefabricating a finished reinforcing mesh sheet, and assembling and fixing the reinforcing mesh sheet on site;
s4: welding a water stop steel plate and a triangular support;
s5: adding a steel wire mesh and a lead wire mesh;
s6: and (4) checking and accepting the raft board, pouring the raft board concrete when the raft board is qualified, and returning to the step S2 when the raft board is unqualified.
2. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: and in the step S1, conditions such as a reserved position, a length and a range of the post-cast strip construction joint are determined according to drawing design requirements and an actual construction range, marks are left at the construction joint position during site construction setting-out positioning, and a foundation is laid for a special method of the later construction joint position.
3. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: when the raft waterproof protective layer is constructed in the step S2, the same-grade fine aggregate concrete is used at the position of the post-cast strip construction joint determined in advance, the height of the post-cast strip construction joint is determined according to the thickness of the protective layer, the upper part of the post-cast strip construction joint is a trapezoidal grout stop with the width of 100mm, a reinforcing mesh with the height of 200mm is welded on the reinforcing steel bar at the bottom of the post-cast strip construction joint of the raft, and the bottom of the post-cast strip construction joint is blocked by using the quick and easy closing mesh.
4. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: in the step S3, the reinforcing mesh sheets are prepared by adopting HRB400 with the diameter of 14mm and the interval of 150mm and the size of 600mm multiplied by 1500mm, the reinforcing mesh sheets can be properly adjusted according to the thickness and the size of the raft, the installation weight of each mesh sheet is convenient for site construction, and the crossed positions of the reinforcing steel bars are welded;
assembling prefabricated steel bar net sheets at the construction joint position of the casting belt, firstly installing lower layer steel bar net sheets and placing water stop steel plates, and welding the steel bar net sheets; the water stop steel plates and the reinforcing mesh are welded, the joints of the steel plates are welded, the lap joint length of the two steel plates is not less than 50mm, and both ends of the two steel plates are fully welded.
5. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: and in the step S4, a water stop steel plate is welded between the upper layer of reinforcing steel mesh and the lower layer of reinforcing steel mesh in the upper layer and the lower layer of reinforcing steel mesh, after the water stop steel plate is welded, the upper layer of reinforcing steel mesh is installed, and the outer side of the post-cast strip is welded and fixed by a reinforcing steel diagonal brace with the diameter of 16mm to form a triangular support.
6. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: in the step S5, the steel bar mesh sheet is used as a skeleton, a layer of steel wire mesh is bound on the skeleton, and a layer of densely-distributed lead wire mesh is added on the steel wire mesh.
7. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: in the step S6, intensity checking calculation, support reaction force calculation, and deflection checking calculation are adopted.
8. The prefabricated template intercepting construction method for the post-cast strip in the raft of the main building according to claim 1, characterized in that: the raft board contains basic unit, bed course, waterproof layer and water proof coating, the high reinforcing bar net has been laid to the raft board upper surface, and the high reinforcing bar net carries out the bottom shutoff with the net that closes up soon easily, one side of the net that closes up soon is provided with the anti eaves of water proof coating and bottom reinforcing bar welding point, and the welding has reinforcing bar net piece on the anti eaves of water proof coating and the bottom reinforcing bar welding point, welding stagnant water steel sheet between the reinforcing bar net piece, and a reinforcing bar net piece side ligature has the wire net, it has the lead wire net to attach on the wire net again, reinforcing bar net piece opposite side welding has the reinforcing.
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| CN202010288463.8A CN111549826A (en) | 2020-04-14 | 2020-04-14 | Interception construction method for post-cast strip prefabricated formwork in raft of main building |
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| CN202010288463.8A CN111549826A (en) | 2020-04-14 | 2020-04-14 | Interception construction method for post-cast strip prefabricated formwork in raft of main building |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833004A (en) * | 2021-11-04 | 2021-12-24 | 中铁三局集团有限公司 | Deep large raft foundation post-cast strip formwork system and foundation construction method |
| CN114482553A (en) * | 2022-02-24 | 2022-05-13 | 中国十七冶集团有限公司 | Concrete interception processing method for wall column when concrete labels are different |
| CN114991217A (en) * | 2022-06-28 | 2022-09-02 | 中国建筑第七工程局有限公司 | Basement post-cast strip advanced sealing structure, basement post-cast strip advanced sealing mould and basement post-cast strip advanced sealing construction method |
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| GB2349398B (en) * | 1999-03-10 | 2003-08-27 | Nam Seung Lee | Device for intercepting stagnant water |
| CN207608934U (en) * | 2017-12-06 | 2018-07-13 | 中国建筑第二工程局有限公司 | A kind of slab muscle cast-in-place structural post-cast strip blocking apparatus |
| CN210002448U (en) * | 2019-04-26 | 2020-01-31 | 中国建筑第二工程局有限公司 | combined super-thick raft plate post-pouring belt concrete interception device |
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2020
- 2020-04-14 CN CN202010288463.8A patent/CN111549826A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2349398B (en) * | 1999-03-10 | 2003-08-27 | Nam Seung Lee | Device for intercepting stagnant water |
| CN207608934U (en) * | 2017-12-06 | 2018-07-13 | 中国建筑第二工程局有限公司 | A kind of slab muscle cast-in-place structural post-cast strip blocking apparatus |
| CN210002448U (en) * | 2019-04-26 | 2020-01-31 | 中国建筑第二工程局有限公司 | combined super-thick raft plate post-pouring belt concrete interception device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833004A (en) * | 2021-11-04 | 2021-12-24 | 中铁三局集团有限公司 | Deep large raft foundation post-cast strip formwork system and foundation construction method |
| CN114482553A (en) * | 2022-02-24 | 2022-05-13 | 中国十七冶集团有限公司 | Concrete interception processing method for wall column when concrete labels are different |
| CN114991217A (en) * | 2022-06-28 | 2022-09-02 | 中国建筑第七工程局有限公司 | Basement post-cast strip advanced sealing structure, basement post-cast strip advanced sealing mould and basement post-cast strip advanced sealing construction method |
| CN114991217B (en) * | 2022-06-28 | 2024-04-26 | 中国建筑第七工程局有限公司 | Structure and die for pre-closing basement post-pouring belt and construction method |
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