CN205742290U - A kind of bottom plate rear pouring tape force transferring structure - Google Patents

A kind of bottom plate rear pouring tape force transferring structure Download PDF

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Publication number
CN205742290U
CN205742290U CN201620111136.4U CN201620111136U CN205742290U CN 205742290 U CN205742290 U CN 205742290U CN 201620111136 U CN201620111136 U CN 201620111136U CN 205742290 U CN205742290 U CN 205742290U
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CN
China
Prior art keywords
steel
post
plate
cast strip
concrete
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620111136.4U
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Chinese (zh)
Inventor
叶耀东
单正猷
李永奎
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SHANGHAI JIANHAO ENGINEERING CONSULTANCY Co Ltd
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SHANGHAI JIANHAO ENGINEERING CONSULTANCY Co Ltd
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Priority to CN201620111136.4U priority Critical patent/CN205742290U/en
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Publication of CN205742290U publication Critical patent/CN205742290U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of bottom plate rear pouring tape force transferring structure, be made up of sole plate, I-steel and end socket end plate;Described sole plate thickness 1200mm, I-steel uses H400mm × 400mm × 13mm × 21mm, length is determined by post-cast strip width, insert the length of concrete parts not less than 300mm, termination uses 400mm × 400mm × 12mm end socket end plate, I-steel termination uses full weld with end socket end plate, and throat depth is not less than 8mm.Supporting by setting up I-steel, this utility model has following technical effect that 1. minimizings overall periphery building enclosure displacement caused because base plate is not formed;Strengthen sole plate stability in the large, agent structure reasonable stress;2. improve position, post-cast strip underplate concrete intensity, reduce the relative displacement between adjacent side floor panels;3. extend subsoil water percolation path, reduce the percolating water probability at position, post-cast strip.

Description

A kind of bottom plate rear pouring tape force transferring structure
Technical field
This utility model relates to a kind of structure structure promoting base plate globality, relate in particular to one prevent post-cast strip concreting and underplate concrete from pouring between interval time longer, the Deformation control being unfavorable for foundation pit enclosure structure and the structure structure effectively reducing post-cast strip adjacent side floor panels relative displacement.
Background technology
Post-cast strip is cast-in-place monolithic reinforced-concrete structures construction period, in order to overcome the movement joint that may produce harmful cracks because of temperature, contraction and arrange, " Technical code for water proof in underground engineering " (GB50108-2008) related request, should construct after its both sides reach 42d the age of concrete again in post-cast strip, post-cast strip should use compensating concrete to pour, its strength grade is not less than both sides concrete, post-cast strip should be located at bottom slab stress and deformation smaller part position, and spacing and position should be determined by Structural Design Requirement.Base arrangement is linked to be entirety by post-cast strip, and therefore the quality of post empiricism is closely bound up with underplate concrete architecture quality.
In recent years, development along with urban construction, land resource growing tension, construction of large-area deep foundation pit case is of common occurrence, for large deep foundation pit, the waterproof relevant research of underground structure proves that construction project basement bottom board cracks in reinforced concrete is because of concrete drying shrinkage, temperature drop shrinks and the deformation change of Carbonization contract, underplate concrete crack brings substantial amounts of, the repair work of closure crack-leakage water repeatedly and worry, cause a large amount of expense and wasted effort, and affect basement use function, the most long-term percolating water, Corrosion Reinforcement and affect basement service life.
Deep basal pit sole plate arranges post-cast strip can effectively reduce the shrinkage stress of large area concrete, and the generation to reducing underplate concrete crack is significant, it is possible to effectively evade the seepage capability weakened because of concrete structure crack.But in large-scale excavation work progress, it is longer that big base plate forms the time, " Technical code for water proof in underground engineering " (GB50108-2008), after post empiricism typically waits piecemeal bottom slab concreting to complete, 42d just can pour, for high-rise building, the post-cast strip concreting time may be more late.Owing to bottom plate rear pouring tape causes whole base plate not form entirety, foundation pit enclosure structure still will can produce a certain degree of horizontal displacement, the most already produce the deep-foundation pit engineering of greater level displacement, and surrounding enviroment will be brought bigger negative effect.In view of this, in the case of can not closing post empiricism in time, intend seeking a kind of the most not affecting the structure structure of construction in later period neither reducing post-cast strip quantity, reduce base plate and do not form the horizontal displacement of building enclosure in the case of overall structure, reduce the relative displacement of post-cast strip adjacent side floor panels simultaneously.
By certain as a example by the business offices deep basal pit built, Around circumstance complication, in the range of the adjoining building overwhelming majority is positioned at 1 times of cutting depth of foundation ditch, belong to safe class first class of protection foundation ditch.Foundation ditch area 22000m2, deep 18m, building enclosure uses 800-1000mm thickness diaphram wall+3 road concrete support, base plate thickness 1200mm.Foundation ditch is excavated to underplate concrete from ground floor soil and is formed, time-consuming 4 months, during excavation of foundation pit, and building enclosure maximum deviational survey value 21.6mm, exceed deformation alarming value 4mm.Owing to foundation ditch area is relatively big, according to design requirement, underplate concrete is divided into 8 pieces, arranges the post-cast strip of 1000mm width between every adjacent bottom plates.In view of Deep Foundation Pit deformation and surrounding enviroment present situation, intend proposing between post-cast strip, arrange type steel support, 8 pieces of base plate of foundation pit are connected into entirety, effectively reduce building enclosure deformation before base plate does not forms entirety, and then reduce the further deflection causing periphery construction to be built because building enclosure horizontal displacement increases.
According to the 5.2.2 article regulation in " Technical code for water proof in underground engineering " (GB50108-2008), should construct after its both sides reach 42d the age of concrete again in post-cast strip, post-cast strip should use expansive concrete to pour, it is impervious and comprcssive strength is not less than both sides concrete, post-cast strip should be located at stress and deformation smaller part position, spacing and position should be determined by Structural Design Requirement, and width is preferably 700-1000mm.For reducing the building enclosure horizontal displacement that post-cast strip concreting causes time lag, this utility model patent proposes on this basis.
Utility model content
The subject matter that this utility model solves is to provide and a kind of reduce big base plate and do not form the deflection of building enclosure during entirety because arranging post-cast strip.To achieve these goals, concrete technical scheme of the present utility model is as follows:
A kind of bottom plate rear pouring tape force transferring structure, is made up of sole plate 2, I-steel 3 and end socket end plate 1;Described sole plate thickness 1200mm, I-steel uses H400mm × 400mm × 13mm × 21mm, length is determined by post-cast strip width, insert the length of concrete parts not less than 300mm, firm with adjacent concrete contact surface for guaranteeing I-steel termination, termination uses 400mm × 400mm × 12mm steel plate to carry out end socket process, and I-steel termination uses full weld with steel plate, and throat depth is not less than 8mm.
The rear pouring tape construction method that this utility model I-steel supports:
1, before earth excavation, labelling post-cast strip location boundary in advance;
2, backbreak on the basis of being excavated to bed course floor level 10cm (both sides 45 in post-cast strip0Put slope);
3, post-cast strip uses I-steel to connect support replacement, and I-steel is connected by head plate;
4, I-steel inserts floor length no less than 300mm;
5, I-steel uses full weld to be connected with head plate, weld seam hfThickness is not less than 8mm;
6, arranging Steel bar rack below I-steel, if desired, head plate end cableway vertical with base plate welds;
7, about I-steel level interval 5m;
8, I-steel position arranges steel plate waterstop strip;
9, during the concrete pouring construction of post-cast strip, should pour underplate concrete in first dabbing both sides, and remove the rubbish such as position, post-cast strip concrete residue.
Accompanying drawing explanation
Fig. 1 is this utility model bottom plate rear pouring tape force transferring structure schematic diagram.
Fig. 2 is this utility model embodiment schematic diagram.
Fig. 3 is this utility model head plate structural representation.
Wherein:
1-end socket end plate 450mm × 450mm × 12mm;
2-sole plate/mm;
3-H400mm × 400mm × 13mm × 21mm I-steel;
4-weld seam full weld, thickness is not less than 8mm;
B-head plate height/mm;
C-inserts concrete I-steel length, not less than 300mm;
H-base plate thickness/mm.
Detailed description of the invention
As shown in Figures 2 and 3, a kind of bottom plate rear pouring tape force transferring structure, it is made up of sole plate 2, I-steel 3 and end socket end plate 1;Described sole plate thickness 1200mm, I-steel uses H400mm × 400mm × 13mm × 21mm, length is determined by post-cast strip width, insert the length of concrete parts not less than 300mm, firm with adjacent concrete contact surface for guaranteeing I-steel termination, termination uses 400mm × 400mm × 12mm steel plate to carry out end socket process, and I-steel termination uses full weld with steel plate, and throat depth is not less than 8mm.
The rear pouring tape construction method that this utility model I-steel supports:
1, before earth excavation, labelling post-cast strip location boundary in advance;
2, backbreak on the basis of being excavated to bed course floor level 10cm (slope is put in 45 °, both sides) in post-cast strip;
3, post-cast strip uses I-steel to connect support replacement, and I-steel is connected by head plate;
4, I-steel inserts floor length no less than 300mm;
5, I-steel uses full weld to be connected with head plate, weld seam hfThickness is not less than 8mm;
6, arranging Steel bar rack below I-steel, if desired, head plate end cableway vertical with base plate welds;
7, about I-steel level interval 5m;
8, I-steel position arranges steel plate waterstop strip;
9, during the concrete pouring construction of post-cast strip, should pour underplate concrete in first dabbing both sides, and remove the rubbish such as position, post-cast strip concrete residue.
This utility model reduces because post-cast strip concreting is delayed, dismantling concrete support during additional levels displacement produced by building enclosure reduce the relative displacement of adjacent block base plate.It is may to produce, because of temperature, contraction, the movement joint that harmful cracks is arranged at bottom slab stress and deformation smaller part position in order to overcome that the staying of post-cast strip sets, also it is the important relation tie of base arrangement stress simultaneously, the most crucial to the stability in the large of base arrangement stress, width is preferably 700-1000mm.The indwelling of post-cast strip has bigger effect for solving temperature shrinkage stress and relative settlement to the impact of structure, but interval time is longer between post-cast strip concreting and underplate concrete pour, both affect the adhesion strength of New-old concrete, be also unfavorable for the Deformation control of foundation pit enclosure structure simultaneously.Support by setting up I-steel, there is following clear superiority:
1. reduce because base plate does not forms the overall periphery building enclosure displacement caused;Strengthen sole plate stability in the large, agent structure reasonable stress;
2. improve position, post-cast strip underplate concrete intensity, reduce the relative displacement between adjacent side floor panels;
3. extend subsoil water percolation path, reduce the percolating water probability at position, post-cast strip.

Claims (1)

1. a bottom plate rear pouring tape force transferring structure, it is characterised in that be made up of sole plate (2), I-steel (3) and end socket end plate (1);Described sole plate thickness 1200mm, I-steel uses H400mm × 400mm × 13mm × 21mm, length is determined by post-cast strip width, insert the length of concrete parts not less than 300mm, termination uses 400mm × 400mm × 12mm end socket end plate, I-steel termination uses full weld with end socket end plate, and throat depth is not less than 8mm.
CN201620111136.4U 2016-02-04 2016-02-04 A kind of bottom plate rear pouring tape force transferring structure Expired - Fee Related CN205742290U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620111136.4U CN205742290U (en) 2016-02-04 2016-02-04 A kind of bottom plate rear pouring tape force transferring structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620111136.4U CN205742290U (en) 2016-02-04 2016-02-04 A kind of bottom plate rear pouring tape force transferring structure

Publications (1)

Publication Number Publication Date
CN205742290U true CN205742290U (en) 2016-11-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109403473A (en) * 2018-10-31 2019-03-01 中建局集团建设发展有限公司 The box shape steel structure formula load transfer device and its construction method of bottom plate rear pouring tape
CN110130355A (en) * 2018-02-08 2019-08-16 中国二十冶集团有限公司 Base plate of foundation pit post-cast strip force transferring structure and its construction method
CN110185043A (en) * 2019-06-14 2019-08-30 中国十七冶集团有限公司 A kind of deep foundation pit support inner support support replacement method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110130355A (en) * 2018-02-08 2019-08-16 中国二十冶集团有限公司 Base plate of foundation pit post-cast strip force transferring structure and its construction method
CN110130355B (en) * 2018-02-08 2021-05-14 中国二十冶集团有限公司 Foundation bottom plate post-cast strip force transmission structure and construction method thereof
CN109403473A (en) * 2018-10-31 2019-03-01 中建局集团建设发展有限公司 The box shape steel structure formula load transfer device and its construction method of bottom plate rear pouring tape
CN110185043A (en) * 2019-06-14 2019-08-30 中国十七冶集团有限公司 A kind of deep foundation pit support inner support support replacement method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161130

Termination date: 20200204

CF01 Termination of patent right due to non-payment of annual fee