CN102587415B - 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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- CN102587415B CN102587415B CN201210093587.6A CN201210093587A CN102587415B CN 102587415 B CN102587415 B CN 102587415B CN 201210093587 A CN201210093587 A CN 201210093587A CN 102587415 B CN102587415 B CN 102587415B
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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 construction method of sole plate, particularly a kind of construction method of foundation slab in subsurface structure engineering.
Background technology
The construction of foundation slab in subsurface structure engineering mainly comprises three parts: waterproof construction, reinforcing bar binding and concreting.The quality of underground waterproof structure directly affects the construction quality of construction of underground structure; The seepage that its major quality controlling point is waterproof.And seepage is a kind of common quality defect, can only implement to correct prevention and control measure for water leakage problem.Cause the many reasons that has of Seepage, but main cause is summed up two kinds, the one, material factor, the 2nd, construction technology, material factor is controlled, and the improvement of construction technology becomes the key of underground waterproof engineering quality.
In general Foundation Design in the past, conventional construction technique is after construction of waterproof layer completes, carry out again the colligation of baseplate reinforcing bar, because reinforcing bar weight is very large, often the concrete pad that plays point action is crushed, cause the dislocation of waterproofing course destruction and assembling reinforcement, and cannot ensure the design thickness of concrete cover; Along with the construction of agent structure, after dewatering well sealing, underground water rises and supercharging gradually, and impaired waterproofing course position and construction link weak part start infiltration, and in the time that seepage is serious, water will penetrate concrete structure, and corrosion reinforcing bar affects structural safety.This timely leak stopping of just need to taking measures is mended and is oozed, but fundamentally can't resolve leakage problems.The seepage of the underground waterproof that therefore conventional construction technique causes and thickness of concrete cover inequality, become the lifelong quality flaw of construction of underground structure.Have, because base plate of foundation pit thickness is thicker, reinforcing bar weight is large, adopts existing binding method again, and buckling deformation easily occurs Dual-layer reinforcing bar in the time of colligation, top reinforcement even can occur and topple over the phenomenon being laminated on lower floor's reinforcing bar, and unsafe factor is very large.
Summary of the invention
The present invention provides a kind of construction method of foundation slab in subsurface structure engineering for solving the technical problem existing in known technology; this construction method can be protected the waterproof layer structure under sole plate; it is not damaged, and can ensures that the thickness of concrete cover of sole plate reaches designing requirement.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is: a kind of construction method of foundation slab in subsurface structure engineering, comprises the following steps:
One) before sole plate construction, the pile crown of Foundation Design stake is blocked and is trimmed to design elevation;
Two) adopt the pile crown of Foundation Design stake as the fulcrum of truss, along the horizontal and vertical truss welding with the pile crown of Foundation Design stake that forms respectively, all truss form 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 basic waterproofing course should meet the thickness requirement of sole plate concrete cover; The thickness of support frame should meet the thickness requirement of sole plate concrete cover;
The cross section of every truss structure is del, one of lower floor's reinforcing bar that the lower edge of truss is sole plate, the winding up as two in the top reinforcement of sole plate of truss;
Three) at lower floor's reinforcing bar of the bottom of support frame basis of formation base plate, at the top reinforcement of the top of support frame basis of formation base plate;
Four) concreting, maintenance.
Described truss is prefabricated component.
The fulcrum of described truss also comprises the adjustable seats being placed on basic waterproofing course.
Described adjustable seats comprises the base plate being placed on basic waterproofing course, is connected with double-screw bolt on base plate, and double-screw bolt is provided with by the connected top board of nut, top plate supporting truss.
Described truss is provided with diagonal bar.
Advantage and good effect that the present invention has are:
1) the lattice support frame that employing is formed by the truss of horizontally set and the truss of longitudinally setting is as the support frame of colligation sole plate top reinforcement and lower floor's reinforcing bar, by truss welding on engineering pile, adjustable seats is set at the position of needs to be supported, form the entirety that upper and lower surrounding is stable, then the top reinforcement of colligation sole plate reinforcing bar on firm lattice support frame, lower floor's reinforcing bar and the dowel between them, remove the cushion block of in the past establishing in order to meet concrete cover from, form the large stretch of space without cushion block, fundamentally eliminate the phenomenon that pierces through waterproofing course generation percolating water because cushion block is crushed.
2) adopt and there is the support frame of cancelled structure as the support frame of sole plate top reinforcement and lower floor's reinforcing bar, strengthened the rigidity of baseplate reinforcing bar structure, make it be difficult for scratching change, be convenient to ensure that the thickness of concrete cover of sole plate reaches designing requirement.
3) adopt and have the support frame of cancelled structure as the support frame of sole plate top reinforcement and lower floor's reinforcing bar, can make the upper and lower layer of sole plate reinforcing bar stablize in the time of colligation smooth-going, work progress is safe and reliable, has strengthened operation construction safety and has ensured.
4) adopt and there is the support frame of cancelled structure as the support frame of sole plate top reinforcement and lower floor's reinforcing bar, be applicable to very much district operation, make the colligation of sole plate reinforcing bar there is stronger flexibility.
5) adopt and there is the support frame of cancelled structure as the support frame of sole plate top reinforcement and lower floor's reinforcing bar, not only be applicable to district operation, and truss can be prefabricated in advance, can the reduction of erection time, ensure process quality, there are obvious duration benefit and quality assurance reliably, in super large deep foundation ditch district operation process, manifest very outstanding.
Brief description of the drawings
Fig. 1 is the base plate elevation that adopts the present invention's construction;
Fig. 2 is step 2 of the present invention) in form the partial top view of lattice support frame by truss;
Fig. 3 be in the present invention a truss structure and colligation at the lateral view of the part sole plate top reinforcement at its top;
Fig. 4 is the structural representation of the adjustable seats that adopts of the present invention.
In figure: 1, truss, 2, concrete, 3, engineering pile, 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.
Detailed description of the invention
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1～Fig. 3, a kind of construction method of foundation slab in subsurface structure engineering, comprises the following 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 pile crown of Foundation Design stake 3 as the fulcrum of truss 1, along the horizontal and vertical truss 1 welding with the pile crown of Foundation Design stake 3 that forms respectively, all truss form 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 basic waterproofing course 8 should meet the thickness requirement of sole plate concrete cover; The thickness of support frame should meet the thickness requirement of sole plate concrete cover; The cross section of every truss structure 1 is del.The present embodiment is the lower edge 1-2 using lower floor's reinforcing bar of a pile foundation base plate as truss according to arrangement of reinforcement situation, the 1-3 that winds up using the top reinforcement of two pile foundation base plates as truss, length using the span of Foundation Design stake 3 as truss, configuration stud and diagonal bar 1-1, form single truss structure 1 by node weld, and reserve the joint surplus between two Pin.
Taking 2 meters of thick concrete bases as example, the distance between 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, lower floor's reinforcing bar of the common basis of formation base plate of lower edge of these lower floor's reinforcing bars and all truss, at all the other top reinforcementes 9 of the top of support frame colligation sole plate, the top reinforcement of the common basis of formation base plate that winds up of these top reinforcementes and all truss.
Four) concreting 2, maintenance.
When as inadequate in pile crown absolute altitude or span is excessive and available without stake, adopt adjustable seats pad control topping.Adjustable seats is used under specific condition.Refer to Fig. 4, in the present embodiment, adjustable seats comprises the base plate 4 being placed on basic waterproofing course 8, is connected with double-screw bolt 5 on base plate 4, and double-screw bolt 5 is provided with by the connected top board 7 of nut 6, top board 7 sub-trusses 1.By the bearing height of the adjustable top board 7 of rotating nut 6.
Before sole plate reinforcement construction, waterproofing course and bed course operation complete, the pile crown of engineering pile has blocked and has been trimmed to design elevation, 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 pile, can not meet the demands as the distance between engineering pile time, can adopt support with adjustable that main muscle is erected, remove the cushion block of in the past establishing in order to meet concrete cover from, form the large stretch of space without cushion block, fundamentally eliminate the phenomenon that pierces through waterproofing course generation percolating water because cushion block is crushed, insoluble quality problems are for many years solved, 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 in an orderly manner the firm system of triangle with other reinforcing bars, the truss of welding has formed firm lattice support frame in length and breadth, can effectively avoid the upper and lower layer of all the other sole plates reinforcing bar that buckling deformation occurs in the time of colligation and even topple over the phenomenon laminating.
The construction process of above-mentioned foundation slab in subsurface structure engineering is as follows:
1. check the part reinforcing bar of bar gauge → 2. calculate vertical brace spacing → 3. and form the truss of truss → 4. along two forming lattice support frame → 5. base plate steel bar binding → 6. hidden examination → 7. concreting → 8. maintenance → 9. enter next process to welding in length and breadth.
The present invention is according to engineering foundation base plate thickness, utilize a part for sole plate reinforcing bar to manufacture truss, according to the principle of girder truss, utilize engineering pile crown and adjustable seats to do fulcrum, by truss welding on engineering pile, adjustable seats is set at the position of needs and supports, then between adjacent truss all the other top reinforcementes and lower floor's reinforcing bar and the dowel between them of colligation sole plate reinforcing bar.Remove all concrete protective layer pads from, both ensured the thickness of sole plate concrete cover, also ensured below base plate that waterproof construction can not leak because being punctured, and has realized the protection to waterproof construction from root simultaneously.
By facts have proved: above-mentioned construction method can be protected waterproofing course, ensure the thickness of sole plate concrete cover, and it is smooth-going that the upper and lower layer of sole plate reinforcing bar stablized in the time of colligation, improved construction safety assurance coefficient.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (4)
1. a construction method for foundation slab in subsurface structure engineering, is characterized in that, comprises the following steps:
One) before sole plate construction, the pile crown of Foundation Design stake is blocked and is trimmed to design elevation;
Two) adopt the pile crown of Foundation Design stake as the fulcrum of truss, along the horizontal and vertical truss welding with the pile crown of Foundation Design stake that forms respectively, all truss form 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 basic waterproofing course should meet the thickness requirement of sole plate concrete cover; The thickness of support frame should meet the thickness requirement of sole plate concrete cover;
The cross section of every truss structure is del, one of lower floor's reinforcing bar that the lower edge of truss is sole plate, the winding up as two in the top reinforcement of sole plate of truss;
Three) at lower floor's reinforcing bar of the bottom of support frame basis of formation base plate, at the top reinforcement of the top of support frame basis of formation base plate;
Four) concreting, maintenance.
2. the construction method of foundation slab in subsurface structure engineering according to claim 1, is characterized in that, described truss is prefabricated component.
3. the construction method of foundation slab in subsurface structure engineering according to claim 1, is characterized in that, the fulcrum of described truss also comprises the adjustable seats being placed on basic waterproofing course.
4. the construction method of foundation slab in subsurface structure engineering according to claim 3, it is characterized in that, described adjustable seats comprises the base plate being placed on basic waterproofing course, is connected with double-screw bolt on base plate, double-screw bolt is provided with by the connected top board of nut, top plate supporting truss.
Priority Applications (1)
| 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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| 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 CN102587415A (en) | 2012-07-18 |
| CN102587415B true CN102587415B (en) | 2014-06-25 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231525A (en) * | 1996-12-18 | 1998-09-02 | Electric Power Dev Co Ltd | Pile foundation structure |
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2012
- 2012-03-27 CN CN201210093587.6A patent/CN102587415B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平10231525A 1998.09.02 |
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| CN102587415A (en) | 2012-07-18 |
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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. |
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