CN208563346U - A kind of large span band angle brace prestressing force Double-row Piles Support system - Google Patents
A kind of large span band angle brace prestressing force Double-row Piles Support system Download PDFInfo
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- CN208563346U CN208563346U CN201821090177.5U CN201821090177U CN208563346U CN 208563346 U CN208563346 U CN 208563346U CN 201821090177 U CN201821090177 U CN 201821090177U CN 208563346 U CN208563346 U CN 208563346U
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- foundation pit
- campshed
- crown beam
- stake
- angle brace
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Abstract
The utility model provides a kind of large span band angle brace prestressing force Double-row Piles Support system.The support system includes the preceding campshed on the inside of foundation pit, the rear campshed on the outside of foundation pit, the crown beam for connecting preceding campshed and rear campshed and the angle brace that each corner of foundation pit is arranged in, campshed is the bored concrete pile arranged by design spacing along margin of foundation pit parallel lines before before described, campshed is by design bored concrete pile of the spacing far from the domed arrangement of foundation pit after described, the crown beam is domed concrete structure, and presstressed reinforcing steel is equipped in crown beam.When Support of Foundation Pit Excavation system in the utility model plays a role, the prestressing force of pre-add can completely or partially offset stress variation caused by off-load, increase the rigidity of crown beam, and utilize the advantage of domes, the gusset form for transferring force to both sides greatly improves the ability of double-row pile resistance to deformation, to effectively accurately control foundation pit displacement, the deformation for substantially reducing foundation pit, extends its scope of application.
Description
Technical field
The present invention relates to a kind of large span band angle brace prestressing force Double-row Piles Support systems, and in particular to architectural engineering, subway
The underground engineerings excavation of foundation pit bracing engineering technical field such as engineering.
Background technique
With being becoming tight the day of urban land and the intensive requirement of function, high-rise or super high-rise building, Large Underground are comprehensive
Hinge construction etc. is at a kind of inexorable trend, and along with underground engineering construction, come into being many large complicated deep basal pits.
Foundation pit mainly has slope excavation, cantilever supporting structure, cement-soil gravity retaining wall building enclosure, inner support at present
A variety of of formula supporting construction, tension-anchor bracing structure, soil nailed wall retaining structure, deep-well supporting construction and Retaining Structure with Double-row Piles etc.
Shield form.
For double-row pile compared with other supporting construction, place needed for having the advantage that 1) is few, goes out a possibility that property line
Very little and, the better region that is suitable for building dense small to surrounding enviroment extent of the destruction；2) front and back campshed and crown beam form
Space structure, the ability with stronger globality and resistance to deformation；3) when by external force complicated and changeable, front and rear row
Stake itself internal force of adjustable distribution structure under the effect of stake top coupling beam.By its superior working performance, Double-row Piles Support knot
Structure is widely used, but when the biggish base pit engineering of and depth big to area, the antidumping of Retaining Structure with Double-row Piles and
Deformation is difficult to meet existing design code requirement, to solve this problem, it is necessary to improve to Retaining Structure with Double-row Piles.
Summary of the invention
The purpose of the present invention is deficiency provides a kind of large span band angle brace prestressing force Double-row Piles Support according to prior art
System, the support system greatly improve the ability of double-row pile resistance to deformation, so that foundation pit displacement effectively is accurately controlled,
The deformation for substantially reducing foundation pit, extends its scope of application.
To achieve the above object, a kind of technical solution provided by the utility model are as follows: large span band angle brace prestressing force
Double-row Piles Support system, it is characterised in that: including preceding campshed, the rear campshed on the outside of foundation pit, connection on the inside of foundation pit
The crown beam of preceding campshed and rear campshed and the angle brace that each corner of foundation pit is set, it is described before before campshed be by design spacing along base
Pit edge parallel lines arrangement bored concrete pile, it is described after campshed be by design bored concrete pile of the spacing far from the domed arrangement of foundation pit,
The crown beam is domed concrete structure, and presstressed reinforcing steel is equipped in crown beam.
The utility model preferably technical solution: campshed is upright stake after described, and the preceding campshed is stake top to outside foundation pit
Side, stake bottom are to foundation pit inside in the raked pile at 0~30 degree of inclination angle.
The utility model preferably technical solution: side of the crown beam close to foundation pit is arranged in the presstressed reinforcing steel, in crown beam
Both ends be equipped with tension of prestressed tendon anchored end, the both ends of the presstressed reinforcing steel are fixed on crown beam both ends by strand tapered anchorage
Anchored end.
The utility model preferably technical solution: the prestress value size in the crown beam can be according to calculation formulaIt obtains, wherein NPFor the prestressing force of application, β is fulcrum force coefficient, and γ is the bulk density of soil, and H is that excavation is deep
Degree, KaFor coefficient of active earth pressure, L is the length of crown beam, and f is the sag of presstressed reinforcing steel, and when design is considered as prestressed damage
It loses.Above-mentioned formula is according to prestressed equivalent loadIt is published with nineteen ninety-five and " deep foundation pit support is write by force by Huang
Internal force reckoner " the fulcrum power of single fulcrum Mixed support structure under China and foreign countries' load actionReason under equal
Think what equilibrium state obtained.
The utility model preferably technical solution: the stake diameter of the preceding campshed and rear campshed is 500mm~1500mm；It is described
Preceding campshed stake clear distance can be 250mm~5000mm；Campshed stake spacing campshed equal or preceding with the stake spacing of preceding campshed after described
Twice of stake spacing；And the stake diameter that preceding campshed and rear campshed stake spacing are 2.5~5 times.
The utility model preferably technical solution: the crown beam of the foundation pit longer sides is divided into support by concrete slab more
Section, and have stand column pile to support lower disposed in concrete slab.
The utility model preferably technical solution: the angle of the angle brace arrangement is 30 °~50 °.
The utility model preferably technical solution: the angle brace is the concrete diagonal brace in the setting of foundation pit corner, with crown beam
End is connected.
The utility model preferably technical solution: the presstressed reinforcing steel being arranged in the crown beam is the high-strength low pine being arranged in vitro
The steel strand wires of relaxation, and be isolated with bellows or plastic tube with concrete.
The main reinforcement of preceding campshed described in the utility model and rear campshed, which anchors into combine in crown beam with angle brace, is collectively formed one
Prestressing force support system, angle brace play power transmitting.
Compared with prior art, the invention has the characteristics that and the utility model has the advantages that the present invention be based on prestressing force principle,
On the basis of conventional two-row stake supporting construction, high strength wire is set in crown beam, when Support of Foundation Pit Excavation system starts to send out
When waving effect, the prestressing force of pre-add can completely or partially offset stress variation caused by off-load, increase the rigidity of crown beam, and utilize
The advantage of domes transfers force to the gusset form on both sides, greatly improves the ability of double-row pile resistance to deformation, thus
Foundation pit displacement is effectively accurately controlled, substantially reduces the deformation of foundation pit, extends its scope of application.
Detailed description of the invention
Fig. 1 is support system floor map in the utility model；
Fig. 2 is the utility model foundation pit long edge position support system floor map；
Fig. 3 is Retaining Structure with Double-row Piles diagrammatic cross-section；
Fig. 4 is presstressed reinforcing steel floor map in the utility model crown beam.
In figure: 1-preceding campshed, 2-rear campsheds, 3-crown beams, 4-angle braces, 5-presstressed reinforcing steels, 6-concrete to support,
7-stand column pile.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and detailed description.One kind as depicted in figs. 1 and 2
Large span band angle brace prestressing force Double-row Piles Support system, it is characterised in that: including on the inside of the foundation pit preceding campshed 1, be located at base
The rear campshed 2 in outside is cheated, the crown beam 3 of preceding campshed and rear campshed is connected and the angle brace 4 in each corner of foundation pit, the angle are set
Support 4 is to be connected in the concrete diagonal brace of foundation pit corner setting with crown beam end, and the angle that angle brace 4 is arranged is 30 °~50 °；It is described
Preceding campshed 1 is the bored concrete pile arranged by design spacing along margin of foundation pit parallel lines, and the rear campshed is separate by design spacing
The bored concrete pile of the domed arrangement of foundation pit；The crown beam 3 is domed concrete structure, and the crown beam 3 of the foundation pit longer sides is logical
It crosses concrete slab to divide for multistage support 6, and has stand column pile 7 to 6 lower disposeds of support in concrete slab.
As shown in Figure 3 and Figure 4, presstressed reinforcing steel 5 is equipped in crown beam 3, the presstressed reinforcing steel 5 is arranged in crown beam 3 close to base
The side in hole is equipped with the anchored end of tension of prestressed tendon at the both ends of crown beam 3, and the both ends of the presstressed reinforcing steel 5 pass through clip type
Anchorage is fixed on the anchored end at 3 both ends of crown beam.The presstressed reinforcing steel 5 being arranged in the crown beam is the high-strength underrelaxation being arranged in vitro
Steel strand wires, and be isolated with bellows or plastic tube with concrete.Both increase the sag of deformed bar in crown beam, and increase prestressing force
The equivalent load of reinforcing bar, while deformed bar is easily installed and recycled again.
As shown in figure 3, campshed 2 is upright stake after described, preceding campshed is in foundation pit inside to foundation pit outside, stake bottom for stake top
The stake diameter of the raked pile at 0~30 degree of inclination angle, the preceding campshed 1 and rear campshed 2 is 500mm~1500mm；The preceding campshed stake is net
Away from can be 250mm~5000mm；2 spacing of campshed, 1 spacing of campshed equal or preceding with the stake spacing of preceding campshed 1 after described
Twice；And the stake diameter that preceding campshed 1 is 2.5~5 times with 2 spacing of rear campshed.
Below with reference to embodiment, the present invention will be further described, and embodiment is a certain construction ground foundation pit construction, according to
Support system is constructed in the utility model, and the stake diameter of preceding campshed 1 and rear campshed 2 is that 800mm, stake spacing are
1500mm, the tilt angle of preceding campshed are in 10 degree.3 both ends of crown beam are equipped with the anchored end of 5 tensioning of presstressed reinforcing steel, and anchorage uses intermediate plate
Formula anchorage, wherein presstressed reinforcing steel 5 is the steel strand wires for the high-strength underrelaxation being arranged in vitro, and with bellows or plastic tube and concrete
Isolation, had both increased the sag of deformed bar in crown beam, and had increased the equivalent load of deformed bar, while being easily installed and returning again
Receive deformed bar.
Prestress value size can be according to calculation formulaIt obtains, wherein NPFor the prestressing force of application, β is
Fulcrum force coefficient, γ are the bulk density of soil, and H is cutting depth, KaFor coefficient of active earth pressure, L is the length of crown beam, and f is to answer in advance
The sag of power muscle, when design, are considered as prestressed loss.
Above-mentioned formula is according to prestressed equivalent loadIt is published with nineteen ninety-five and " deep basal pit is write by force by Huang
Support internal force reckoner " the fulcrum power of single fulcrum Mixed support structure under China and foreign countries' load actionUnder equal
Desirable balance state obtain.
The support system of the utility model is to be based on prestressing force principle, on the basis of conventional two-row stake supporting construction, in
High strength wire is set in crown beam, when Support of Foundation Pit Excavation system starts to play a role, the prestressing force of pre-add can all or
Stress variation caused by partial offset off-load increases the rigidity of crown beam, and using the advantage of domes, transfers force to both sides
Gusset form, greatly improve the ability of double-row pile resistance to deformation, thus effectively and accurately control foundation pit displacement, substantially
The deformation for reducing foundation pit, extends its scope of application.
The embodiments of the present invention are described above in conjunction with attached drawing, but the invention is not limited to above-mentioned
Specific embodiment, the above mentioned embodiment is only schematical, rather than restrictive, the ordinary skill of this field
Personnel under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, can also make
Many forms, all of these belong to the protection of the present invention.
Claims (9)
1. a kind of large span band angle brace prestressing force Double-row Piles Support system, it is characterised in that: including the front row on the inside of foundation pit
Stake (1), the rear campshed (2) on the outside of foundation pit, the crown beam (3) for connecting preceding campshed and rear campshed and setting are at each angle of foundation pit
The angle brace (4) in portion, the preceding campshed (1) are the bored concrete pile arranged by design spacing along margin of foundation pit parallel lines, the heel row
Stake is by design bored concrete pile of the spacing far from the domed arrangement of foundation pit, and the crown beam (3) is domed concrete structure, and
Presstressed reinforcing steel (5) are equipped in crown beam (3).
2. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1, it is characterised in that: described
Campshed (2) is upright stake afterwards, the preceding campshed be stake top on the outside of foundation pit, stake bottom is to inclining in 0~30 degree of inclination angle on the inside of foundation pit
Taper pile.
3. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1 or 2, it is characterised in that:
Presstressed reinforcing steel (5) setting close to the side of foundation pit, is equipped with tension of prestressed tendon at the both ends of crown beam (3) in crown beam (3)
The both ends of anchored end, the presstressed reinforcing steel (5) are fixed on the anchored end at crown beam (3) both ends by strand tapered anchorage.
4. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1 or 2, it is characterised in that:
Prestress value size in the crown beam can be according to calculation formulaIt obtains, wherein NPPre- for application answers
Power, β are fulcrum force coefficient, and γ is the bulk density of soil, and H is cutting depth, KaFor coefficient of active earth pressure, L is the length of crown beam, f
For the sag of presstressed reinforcing steel.
5. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1 or 2, it is characterised in that:
The stake diameter of the preceding campshed (1) and rear campshed (2) is 500mm~1500mm；The preceding campshed stake clear distance can for 250mm~
5000mm；Twice of campshed (2) stake spacing campshed (1) stake spacing equal or preceding with the stake spacing of preceding campshed (1) after described；
And the stake diameter that preceding campshed (1) and rear campshed (2) stake spacing are 2.5~5 times.
6. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1 or 2, it is characterised in that:
The crown beam (3) of the foundation pit longer sides is divided into multistage to support (6) by concrete slab, and in concrete slab to support (6) lower part cloth
It is equipped with stand column pile (7).
7. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1 or 2, it is characterised in that:
The angle of angle brace (4) arrangement is 30 °~50 °.
8. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 1 or 2, it is characterised in that:
The angle brace (4) is to be connected in the concrete diagonal brace of foundation pit corner setting with crown beam end.
9. a kind of large span band angle brace prestressing force Double-row Piles Support system according to claim 3, it is characterised in that: described
The presstressed reinforcing steel (5) being arranged in crown beam is the steel strand wires for the high-strength underrelaxation being arranged in vitro, and with bellows or plastic tube and is mixed
Solidifying soil isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821090177.5U CN208563346U (en) | 2018-07-10 | 2018-07-10 | A kind of large span band angle brace prestressing force Double-row Piles Support system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821090177.5U CN208563346U (en) | 2018-07-10 | 2018-07-10 | A kind of large span band angle brace prestressing force Double-row Piles Support system |
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| Publication Number | Publication Date |
|---|---|
| CN208563346U true CN208563346U (en) | 2019-03-01 |
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ID=65492729
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821090177.5U Active CN208563346U (en) | 2018-07-10 | 2018-07-10 | A kind of large span band angle brace prestressing force Double-row Piles Support system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962523A (en) * | 2020-08-26 | 2020-11-20 | 天津大学 | Combined supporting structure of inclined tubular pile and vertical wedge-shaped pile and construction method thereof |
| CN111962521A (en) * | 2020-08-26 | 2020-11-20 | 天津大学 | Combined supporting structure of inclined wedge-shaped pile and vertical wedge-shaped pile and construction method thereof |
| CN111962522A (en) * | 2020-08-26 | 2020-11-20 | 天津大学 | Combined supporting structure of inclined wedge-shaped pile and vertical pipe pile and construction method thereof |
| CN113802573A (en) * | 2021-09-28 | 2021-12-17 | 天津中勘天泽建筑工程设计有限公司 | Foundation pit prestress pressing plate type multi-row supporting structure and method |
| CN114139352A (en) * | 2021-11-10 | 2022-03-04 | 东北林业大学 | Method, system and device for acquiring maximum sag of reinforced body of reinforced embankment based on 2D-3D conversion coefficient |
-
2018
- 2018-07-10 CN CN201821090177.5U patent/CN208563346U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962523A (en) * | 2020-08-26 | 2020-11-20 | 天津大学 | Combined supporting structure of inclined tubular pile and vertical wedge-shaped pile and construction method thereof |
| CN111962521A (en) * | 2020-08-26 | 2020-11-20 | 天津大学 | Combined supporting structure of inclined wedge-shaped pile and vertical wedge-shaped pile and construction method thereof |
| CN111962522A (en) * | 2020-08-26 | 2020-11-20 | 天津大学 | Combined supporting structure of inclined wedge-shaped pile and vertical pipe pile and construction method thereof |
| CN113802573A (en) * | 2021-09-28 | 2021-12-17 | 天津中勘天泽建筑工程设计有限公司 | Foundation pit prestress pressing plate type multi-row supporting structure and method |
| CN114139352A (en) * | 2021-11-10 | 2022-03-04 | 东北林业大学 | Method, system and device for acquiring maximum sag of reinforced body of reinforced embankment based on 2D-3D conversion coefficient |
| CN114139352B (en) * | 2021-11-10 | 2024-04-16 | 东北林业大学 | Method, system and device for acquiring maximum sag of reinforced body of reinforced embankment based on 2D-3D conversion coefficient |
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Address after: 430080 No. 17 metallurgical Avenue, Qingshan District, Hubei, Wuhan Patentee after: MCC Wukan Engineering Technology Co.,Ltd. Address before: 430080 No. 17 metallurgical Avenue, Qingshan District, Hubei, Wuhan Patentee before: WUHAN SURVEYING GEOTECHNICAL RESEARCH INSTITUTE Co.,Ltd. OF MCC |