CN102587415A - Construction method of foundation slab in subsurface structure engineering - Google Patents
Construction method of foundation slab in subsurface structure engineering Download PDFInfo
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- CN102587415A CN102587415A CN2012100935876A CN201210093587A CN102587415A CN 102587415 A CN102587415 A CN 102587415A CN 2012100935876 A CN2012100935876 A CN 2012100935876A CN 201210093587 A CN201210093587 A CN 201210093587A CN 102587415 A CN102587415 A CN 102587415A
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Abstract
The invention discloses a construction method of a foundation slab in subsurface structure engineering, which comprises the following steps: 1) cutting a pile head of a foundation engineering pile and finishing the pile head of the foundation engineering pile to designed elevation before the construction of the foundation slab; 2) adopting the pile head of the foundation engineering pile as a support point of a truss, forming trusses which are welded with the pile head of the foundation engineering pile respectively in the horizontal direction and the longitudinal direction, wherein all the trusses form a lattice type support frame, the bottom surface elevation and thickness of the support frame should meet thickness requirements on a foundation slab concrete protective layer, the section of each truss is in an inverted triangle shape, the bottom chord of the truss is one of pieces of rebar at the lower layer of the foundation slab, and the upper chords of the truss are two of pieces of rebar at the upper layer of the foundation slab; 3) forming the foundation slab rebar on the support frame; and 4) casting concrete and maintaining. The construction method of the foundation slab in subsurface structure engineering can protect a waterproof layer and ensure the thickness of the foundation slab concrete protective layer, enable the rebar at the upper layer and the rebar at the lower layer of the foundation slab to be bond stably and smoothly, and improve construction safety coefficient.
Description
Technical field
The present invention relates to a kind of job practices of sole plate, particularly a kind of job practices of construction of underground structure sole plate.
Background technology
The construction of construction of underground structure sole plate mainly comprises three parts: waterproof construction, reinforcing bar binding and concreting.The quality quality of underground waterproof structure directly affects the construction quality of construction of underground structure; Its major quality controlling point is the seepage of waterproof.And seepage is a kind of common quality defect, can only implement to correct the prevention and control measure for the water leakage problem.Cause the multiple reason of having of seepage phenomenon, but main cause is concluded two kinds, the one, material factor, the 2nd, construction technology, material factor are controlled, and the improvement of construction technology becomes the key of underground waterproof engineering quality.
In general Foundation Design in the past; Conventional construction technology is after construction of waterproof layer is accomplished; Carry out the base plate laid reinforcement binding again,, often will play the concrete pad crushing of point action because reinforcing bar weight is very big; Cause the dislocation of waterproofing course destruction and assembling reinforcement, and can't guarantee the design thickness of concrete cover; Along with the construction of agent structure, after the sealing of precipitation well, underground water rises and supercharging gradually, and impaired waterproofing course position and construction link weak part begin infiltration, and when seepage was serious, water will penetrate concrete structure, and corrosion reinforcing bar influences structural safety.This timely leak stopping of just need taking measures is mended and is oozed, but fundamentally can't resolve leakage problems.Therefore the seepage and the thickness of concrete cover of the underground waterproof that causes of conventional construction technology are uneven, become the lifelong quality flaw of construction of underground structure.Have, because base plate of foundation pit thickness is thicker, reinforcing bar weight is big, adopts existing binding method again, and buckling deformation takes place when colligation double steel bar easily up and down, even top reinforcement can take place topples over the phenomenon that is laminated on lower floor's reinforcing bar, and unsafe factor is very big.
Summary of the invention
The present invention provides a kind of job practices of construction of underground structure sole plate for solving the technical problem that exists in the known technology; This job practices can be protected the waterproof layer structure under the sole plate; It is not damaged, and can guarantees that the thickness of concrete cover of sole plate reaches designing requirement.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of job practices of construction of underground structure sole plate may further comprise the steps:
One) before sole plate construction, the pile crown of Foundation Design stake is blocked and is trimmed to design elevation;
Two) adopt the fulcrum of the pile crown of Foundation Design stake as truss; Along the truss of horizontal and vertical formation respectively with the pile crown welding of Foundation Design stake; All truss form the lattice support frame; The bottom surface of support frame is parallel with basic waterproofing course, and the distance between the bottom surface of support frame and the basic waterproofing course should satisfy the thickness requirement of sole plate concrete cover; The thickness of support frame should satisfy the thickness requirement of sole plate concrete cover;
The cross section of every truss structure is del, and the lower edge of truss is one of lower floor's reinforcing bar of sole plate, and winding up of truss is two in the top reinforcement of sole plate;
Three), form the top reinforcement of sole plate at the top of support frame at lower floor's reinforcing bar of the bottom of support frame formation sole plate;
Four) concreting, maintenance.
Said truss is a prefabricated component.
The fulcrum of said truss also comprises the adjustable seats that places on the basic waterproofing course.
Said adjustable seats comprises the base plate that places on the basic waterproofing course, is connected with double-screw bolt on the base plate, and double-screw bolt is provided with through the connected top board of nut, top plate supporting truss.
Said truss is provided with diagonal bar.
Advantage and good effect that the present invention has are:
1) adopts the lattice support frame that forms by the truss of horizontally set and the truss that vertically is provided with support frame as colligation sole plate top reinforcement and lower floor's reinforcing bar; Truss is welded on the engineering piles; Adjustable seats is set at the position of needs to be supported; Stable whole around forming up and down, the top reinforcement of colligation sole plate reinforcing bar, lower floor's reinforcing bar and the dowel between them on firm lattice support frame have been removed the cushion block of in the past establishing in order to satisfy concrete cover from then; Form large stretch of space of no cushion block, fundamentally eliminated the phenomenon that pierces through waterproofing course generation percolating water because of cushion block is crushed.
2) employing has the support frame of the support frame of cancelled structure as sole plate top reinforcement and lower floor's reinforcing bar, has strengthened the rigidity of base plate bar construction, makes it be difficult for scratching change, is convenient to guarantee that the thickness of concrete cover of sole plate reaches designing requirement.
3) employing has the support frame of the support frame of cancelled structure as sole plate top reinforcement and lower floor's reinforcing bar, and it is smooth-going that the upper and lower layer of sole plate reinforcing bar stablized when colligation, and work progress is safe and reliable, has strengthened the operation construction safety and has guaranteed.
4) employing has the support frame of the support frame of cancelled structure as sole plate top reinforcement and lower floor's reinforcing bar, is fit to very much district operation, makes the sole plate laid reinforcement binding have stronger flexibility.
5) employing has the support frame of the support frame of cancelled structure as sole plate top reinforcement and lower floor's reinforcing bar; Not only be fit to district operation; And truss can be prefabricated in advance, can the reduction of erection time, guarantee process quality; Tangible duration benefit and quality assurance are reliably arranged, in super large deep foundation ditch district operation process, manifest very outstanding.
Description of drawings
Fig. 1 is for adopting the base plate elevation of the present invention's construction;
Fig. 2 is a step 2 of the present invention) in form the partial top view of lattice support frame by truss;
Fig. 3 is a truss structure among the present invention and the colligation lateral view at the part sole plate top reinforcement at its top;
Fig. 4 is the structural representation of the adjustable seats of the present invention's employing.
Among the figure: 1, truss, 2, concrete, 3, engineering piles, 4, base plate, 5, double-screw bolt, 6, nut, 7, top board, 8, waterproofing course, 9, top reinforcement, 1-1, diagonal bar, the lower edge of 1-2, truss, the winding up of 1-3, truss.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, the following examples of giving an example now, and conjunction with figs. specifies as follows:
See also Fig. 1～Fig. 3, a kind of job practices of construction of underground structure sole plate may further comprise the steps:
One) before sole plate construction, the pile crown of Foundation Design stake 3 is blocked and is trimmed to design elevation;
Two) adopt the fulcrum of the pile crown of Foundation Design stake 3 as truss 1; Along the truss 1 of horizontal and vertical formation respectively with the pile crown welding of Foundation Design stake 3; All truss form the lattice support frame; The bottom surface of support frame is parallel with basic waterproofing course 8, and the distance between the bottom surface of support frame and the basic waterproofing course 8 should satisfy the thickness requirement of sole plate concrete cover; The thickness of support frame should satisfy the thickness requirement of sole plate concrete cover; The cross section of every truss structure 1 is del.Present embodiment according to the arrangement of reinforcement situation with lower floor's reinforcing bar of a pile foundation base plate lower edge 1-2 as truss; With the top reinforcement of two pile foundation base plates the 1-3 that winds up as truss; With the span of Foundation Design stake 3 length as truss; Configuration stud and diagonal bar 1-1 form single truss structure 1 through the node welding, and reserve the joint surplus between two Pin.
With 2 meters thick concrete bases is example, and the distance between the two parallel and adjacent truss structures is generally 1.5～2 meters.
Above-mentioned truss 1 can be prefabricated in advance, also can on-the-spot on pile crown, form.
Three) at all the other lower floor's reinforcing bars of the bottom of support frame colligation sole plate; The lower edge of these lower floor's reinforcing bars and all truss forms lower floor's reinforcing bar of sole plate jointly; At all the other top reinforcementes 9 of the top of support frame colligation sole plate, the common top reinforcement that forms sole plate that winds up of these top reinforcementes and all truss.
Four) concreting 2, maintenance.
Not enough or but span is excessive and do not have a stake time spent like the pile crown absolute altitude, adopt adjustable seats pad control topping.Adjustable seats is used under specific condition.See also Fig. 4, in the present embodiment, adjustable seats comprises the base plate 4 that places on the basic waterproofing course 8, is connected with double-screw bolt 5 on the base plate 4, and double-screw bolt 5 is provided with through nut 6 connected top boards 7, top board 7 sub-trusses 1.Bearing height through swivel nut 6 scalable top boards 7.
Before the sole plate reinforcement construction; Waterproofing course and bed course operation are accomplished, and the pile crown of engineering piles has blocked and be trimmed to design elevation, and the present invention utilizes the part reinforcing bar of sole plate to manufacture truss; The fulcrum of truss is located on the pile crown of engineering piles; In the time of can not meeting the demands like the distance between the engineering piles, can adopt the scalable bearing that main muscle is erected, remove the cushion block of in the past establishing from order to satisfy concrete cover; Form large stretch of space of no cushion block; Fundamentally eliminated the phenomenon that pierces through waterproofing course generation percolating water because of cushion block is crushed, solved insoluble for many years quality problems, the safety assurance coefficient has been strengthened in the innovation of reinforcing bar binding operation that more outstanding is.Because part sole plate reinforcing bar has formed truss form; Be linked to be the firm system of triangle in an orderly manner with other reinforcing bars; The truss of welding has formed firm lattice support frame in length and breadth, can avoid the upper and lower layer of all the other sole plates reinforcing bar buckling deformation to take place when colligation even topple over the phenomenon that laminates effectively.
The construction process of above-mentioned construction of underground structure sole plate is following:
1. checking bar gauge → 2. calculates upright tie distance → 3. and forms the truss of truss → 4. along in length and breadth two to welding formation lattice support frame → 5. base plate reinforcing bar binding → 6. hidden examination → 7. concreting → 8. maintenance → 9. get into next process with the part reinforcing bar.
The present invention is according to the engineering foundation base plate thickness; Utilize the part of sole plate reinforcing bar to manufacture truss; According to the principle of girder truss, utilize engineering pile crown and adjustable seats to do fulcrum, truss is welded on the engineering piles; Adjustable seats is set at the position of needs supports, again all the other top reinforcementes of colligation sole plate reinforcing bar and lower floor's reinforcing bar and the dowel between them between adjacent truss.Removed all concrete cover cushion blocks from, both guaranteed the thickness of sole plate concrete cover, guaranteed also that simultaneously waterproof construction can not leak because of being punctured below the base plate, realized protection waterproof construction from root.
Through facts have proved: above-mentioned job practices can be protected waterproofing course, guarantees the thickness of sole plate concrete cover, and it is smooth-going that the upper and lower layer of sole plate reinforcing bar stablized when colligation, improved the construction safety assurance coefficient.
Although combine accompanying drawing that the preferred embodiments of the present invention are described above; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (5)
1. the job practices of a construction of underground structure sole plate is characterized in that, may further comprise the steps:
One) before sole plate construction, the pile crown of Foundation Design stake is blocked and is trimmed to design elevation;
Two) adopt the fulcrum of the pile crown of Foundation Design stake as truss; Along the truss of horizontal and vertical formation respectively with the pile crown welding of Foundation Design stake; All truss form the lattice support frame; The bottom surface of support frame is parallel with basic waterproofing course, and the distance between the bottom surface of support frame and the basic waterproofing course should satisfy the thickness requirement of sole plate concrete cover; The thickness of support frame should satisfy the thickness requirement of sole plate concrete cover;
The cross section of every truss structure is del, and the lower edge of truss is one of lower floor's reinforcing bar of sole plate, and winding up of truss is two in the top reinforcement of sole plate;
Three), form the top reinforcement of sole plate at the top of support frame at lower floor's reinforcing bar of the bottom of support frame formation sole plate;
Four) concreting, maintenance.
2. the job practices of construction of underground structure sole plate according to claim 1 is characterized in that, said truss is a prefabricated component.
3. the job practices of construction of underground structure sole plate according to claim 1 is characterized in that, the fulcrum of said truss also comprises the adjustable seats that places on the basic waterproofing course.
4. the job practices of construction of underground structure sole plate according to claim 3; It is characterized in that said adjustable seats comprises the base plate that places on the basic waterproofing course, be connected with double-screw bolt on the base plate; Double-screw bolt is provided with through the connected top board of nut, top plate supporting truss.
5. the job practices of construction of underground structure sole plate according to claim 1 is characterized in that, said truss is provided with diagonal bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210093587.6A CN102587415B (en) | 2012-03-27 | 2012-03-27 | Construction method of foundation slab in subsurface structure engineering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210093587.6A CN102587415B (en) | 2012-03-27 | 2012-03-27 | Construction method of foundation slab in subsurface structure engineering |
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| CN102587415A true CN102587415A (en) | 2012-07-18 |
| CN102587415B CN102587415B (en) | 2014-06-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231525A (en) * | 1996-12-18 | 1998-09-02 | Electric Power Dev Co Ltd | Pile foundation structure |
| CN1275667A (en) * | 2000-04-02 | 2000-12-06 | 张云富 | Light type rib floor and construction method |
| CN101173540A (en) * | 2002-04-30 | 2008-05-07 | 邱则有 | Reinforced concrete building roof with solid load-carrying construction |
| CN102061760A (en) * | 2004-11-22 | 2011-05-18 | 邱则有 | Cavity member for concrete hollow slab |
-
2012
- 2012-03-27 CN CN201210093587.6A patent/CN102587415B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231525A (en) * | 1996-12-18 | 1998-09-02 | Electric Power Dev Co Ltd | Pile foundation structure |
| CN1275667A (en) * | 2000-04-02 | 2000-12-06 | 张云富 | Light type rib floor and construction method |
| CN101173540A (en) * | 2002-04-30 | 2008-05-07 | 邱则有 | Reinforced concrete building roof with solid load-carrying construction |
| CN102061760A (en) * | 2004-11-22 | 2011-05-18 | 邱则有 | Cavity member for concrete hollow slab |
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| CN102587415B (en) | 2014-06-25 |
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Effective date of registration: 20200323 Address after: 300451 No. 72, Hangzhou Road, Binhai New Area, Tianjin Co-patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING BUREAU INSTALLATION ENGINEERING Co.,Ltd. Address before: 300456 No. 75, Xingang Road, Tanggu District, Tianjin Co-patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION NO.3 CONSTRUCTION ENGINEERING Co.,Ltd. |
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Address after: 710075 room 11001, 10th floor, building 3, Fengxi new town headquarters economic Park project, Xixian New District, Xi'an, Shaanxi Province Patentee after: China Construction Sixth Engineering Bureau Northwest Construction Co.,Ltd. Patentee after: China Construction Sixth Engineering Bureau Co., Ltd. Address before: No. 72 Hangzhou Road, Tianjin Binhai New Area, 300451 Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING BUREAU INSTALLATION ENGINEERING Co.,Ltd. Patentee before: China Construction Sixth Engineering Bureau Co., Ltd. |
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Address after: 710075 room 11001, 10th floor, building 3, Fengxi new town headquarters economic Park project, Xixian New District, Xi'an, Shaanxi Province Patentee after: The First Construction Co.,Ltd. of China Construction Sixth Engineering Bureau Patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Address before: 710075 room 11001, 10th floor, building 3, Fengxi new town headquarters economic Park project, Xixian New District, Xi'an, Shaanxi Province Patentee before: China Construction Sixth Engineering Bureau Northwest Construction Co.,Ltd. Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. |