CN106320348A - Opposite-pulling anchor cable supporting structure for adjacent deep foundation pits and construction method of opposite-pulling anchor cable supporting structure - Google Patents
Opposite-pulling anchor cable supporting structure for adjacent deep foundation pits and construction method of opposite-pulling anchor cable supporting structure Download PDFInfo
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- CN106320348A CN106320348A CN201610777228.0A CN201610777228A CN106320348A CN 106320348 A CN106320348 A CN 106320348A CN 201610777228 A CN201610777228 A CN 201610777228A CN 106320348 A CN106320348 A CN 106320348A
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- Prior art keywords
- anchor
- support pile
- rock
- cable
- soil
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Abstract
The invention discloses an opposite-pulling anchor cable supporting structure for adjacent deep foundation pits. The opposite-pulling anchor cable supporting structure comprises a rock-soil body, supporting piles, beams, anchor holes, prestressed anchor cables, anchor heads and inter-pile soil blocking plates. One-to-one corresponding supporting piles are arranged at the two sides of the rock-soil body correspondingly; each beam connects the tops of the supporting piles at the same side of the supporting piles together; the anchor holes are horizontal holes and penetrate through the corresponding supporting piles and the rock-soil body; the prestressed anchor cables are placed in the corresponding anchor holes; and the anchor heads anchor the prestressed anchor cables on the supporting piles correspondingly; and each inter-pile soil blocking plate is arranged between every two adjacent supporting piles. According to the anchor cable supporting structure for the adjacent deep foundation pits, displacement of the rock-soil body is limited, anchoring is reliable, and the safety and the stability of side slopes of the adjacent deep foundation pits can be ensured.
Description
Technical field
The present invention relates to deep foundation pit supporting structure and method and technology field, particularly relate to a kind of adjacent foundation pits to drawing anchor
Rope supporting construction and construction method thereof.
Background technology
Along with the accelerated development of Urbanization in China, urban construction is just running into increasing deep-foundation pit engineering, and with
The growing tension of construction land, increasing deep basal pit needs to construct, inevitably in urban architecture compact district
The problem running into adjacent foundation pits supporting.These foundation ditches close on existed building, subterranean tunnel, underground municipal pipeline facility mostly
Deng, existing building around and underground municipal pipeline facility will necessarily be had a negative impact by the construction of these deep basal pits.
It is therefore desirable to a kind of adjacent foundation pits supporting construction so that it is anchoring is reliable, it is possible to ensure limit between adjacent foundation pits
The safety on slope is with stable.
Summary of the invention
Present invention is primarily targeted at provide a kind of adjacent foundation pits to drawing cable bolting structure and construction method thereof,
It is intended to anchoring reliable, ensures the safety of side slope between adjacent foundation pits simultaneously and stablize.
For achieving the above object, the present invention provide a kind of adjacent foundation pits to drawing cable bolting structure, including Rock And Soil,
Breast boards between support pile, crossbeam, anchor hole, prestress anchorage cable, anchor head and stake, wherein, being respectively provided on two sides with of described Rock And Soil
Support pile one to one；The top of the same side support pile is linked together by described crossbeam；Described anchor hole is lateral aperture and passes through
Wear corresponding support pile and Rock And Soil；Described prestress anchorage cable is positioned in anchor hole；Described anchor head is by prestressed cable anchorage
On support pile；It is provided with breast boards between stake between two adjacent described support piles.
Preferably, between described support pile, crossbeam and stake, breast boards is armored concrete.
Preferably, it is additionally provided with spilled water hole on breast boards between described stake.
Preferably, described prestress anchorage cable is made up of multi beam steel strand wires, and described prestress anchorage cable is externally provided with plastic bushing, institute
State and between anchor head and anchor hole, have concrete anchor pier.
Preferably, described anchor head is externally provided with concrete by described anchor head and the closing of described prestress anchorage cable.
Preferably, adjacent foundation pits to drawing cable bolting structure also include the gutter being located at bottom foundation ditch and be located at
The intercepting ditch at side slope top.
Present invention further propose that a kind of based on above-mentioned adjacent foundation pits to drawing the construction method of cable bolting structure, bag
Include following steps:
1) support pile position unwrapping wire, construction supporting stake are carried out according to construction drawing；
2) construction crossbeam, links together the top of the described support pile of homonymy；
3) construction intercepting ditch；
4) Rock And Soil on the left of support pile and the Rock And Soil on the right side of the support pile of right side on the left of excavation；
5) getting out anchor hole on support pile and Rock And Soil, anchor hole is lateral aperture；
6) prestress anchorage cable is positioned in described anchor hole；
7) anchor head is installed in the both sides of anchor hole, by prestress anchorage cable through anchor head；
8) prestress anchorage cable carrying out stretch-draw in both sides simultaneously, the tension sequence of the prestress anchorage cable of same level height is therefrom
Between to both sides stretch-draw；
9) after prestressed anchor cable stretching completes, excise unnecessary steel strand wires, with concrete, anchor head is closed；
10) complete bulkhead construction between the stake within the excavation height of both sides, and between stake, on breast boards, reserve spilled water hole；
11) step 4) is repeated to 10), until having constructed；
12) gutter is set bottom foundation ditch.
Preferably, use boring machine to get out anchor hole on support pile and Rock And Soil, boring procedure uses total station survey
The exposing deviation and use electronics guide instrument to measure drill bit deviation in real time of borer drill rod, to control the horizontal direction of anchor hole and to hang down
Nogata to pitch-row error be not more than 20mm, degree of skewness is not more than 5%.
Preferably, the safe hole-making distance of the support pile and adjacent stake holes that have just completed concreting is no less than 4 times of stakes
Footpath, is no less than 36 hours interval time.
Preferably, after the concrete strength of support pile reaches the 75% of design strength, then support pile is left on the left of excavating
The step of the Rock And Soil on the right side of the Rock And Soil of side and right side support pile；When the concrete strength of all support piles is all higher than 20Mpa
And after reaching the 85% of design strength, then carry out described prestress anchorage cable is carried out the step of stretch-draw.
The present invention propose adjacent foundation pits to drawing cable bolting structure, by wearing anchor in pairs at both sides correspondence support pile
Suo Kong, by anchorage cable anchoring on support pile, is formed drawing anchoring system, and prestress anchorage cable is without free end box anchored end, prop
System by carrying out prestressed stretch-draw respectively to prestress anchorage cable two ends, and is anchored in pile body, forms an entirety, limit with support pile
Rock and soil body's displacement processed, its anchoring is reliable, it is possible to ensures the safety of adjacent foundation pits side slope and stablizes.It addition, by crossbeam by one
The top of collateral fender pile connects, and is provided with breast boards between stake, thus improves the knot of this supporting construction between the most adjacent support pile
Structure intensity.The present invention's is rational in infrastructure, simple to operate, easy to spread, has stronger economy and practicality.
Accompanying drawing explanation
Fig. 1 be adjacent foundation pits of the present invention to the schematic front view drawing cable bolting structure preferred embodiment；
Fig. 2 be adjacent foundation pits of the present invention to the schematic top plan view drawing cable bolting structure preferred embodiment；
Fig. 3 is the anchor hole deviation instrumentation plan to the construction method drawing cable bolting structure of adjacent foundation pits of the present invention.
In figure, 1-Rock And Soil, 2-support pile, 3-crossbeam, 4-intercepting ditch, 5-anchor hole, 6-prestress anchorage cable, 7-anchor head, 8-
Breast boards, 9-spilled water hole, 10-gutter between Zhuan.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The present invention propose a kind of adjacent foundation pits to drawing cable bolting structure.
See figures.1.and.2, in this preferred embodiment, a kind of adjacent foundation pits to drawing cable bolting structure, including ground
Breast boards 8 between body 1, support pile 2, crossbeam 3, anchor hole 5, prestress anchorage cable 6, anchor head 7 and stake, wherein, the both sides of Rock And Soil 1 are divided
It is not provided with support pile 2 one to one；The top of the same side support pile 2 is linked together by crossbeam 3；Anchor hole 5 be lateral aperture also
Run through corresponding support pile 2 and Rock And Soil 1；Prestress anchorage cable 6 is positioned in anchor hole 5；Prestress anchorage cable 6 is anchored by anchor head 7
On support pile 2；It is provided with breast boards 8 between stake between two adjacent support piles 2.
Specifically, in the present embodiment, between support pile 2, crossbeam 3 and stake, breast boards 8 is armored concrete.Support pile 2
Cross section be circular, the cross section of crossbeam 3 is rectangle.The line of the support pile 2 that both sides are corresponding is vertical with Rock And Soil 1, and support pile 2 is stretched
Enter the bottom of Rock And Soil 1.Spilled water hole 9 it is additionally provided with on breast boards 8 between Zhuan.Between Zhuan, the two ends of breast boards 8 are by two adjacent support piles 2 even
Connect.In the present embodiment, spilled water hole 9 is in quincuncial arrangement, and the level interval of spilled water hole 9 is identical with support pile 2 level interval, sluices
The vertical spacing in hole 9 is 2.0m.
In the present embodiment, prestress anchorage cable 6 is made up of multi beam steel strand wires, and prestress anchorage cable 6 is externally provided with plastic bushing, anchor head
Concrete anchor pier is had between 7 and anchor hole 5.Anchor head 7 is externally provided with concrete and anchor head 7 and prestress anchorage cable 6 is closed.
Further, this adjacent foundation pits to the gutter 10 drawing cable bolting structure also to include to be located at bottom foundation ditch with
And it is located at the intercepting ditch 4 at side slope top.
The present invention propose adjacent foundation pits to drawing cable bolting structure, by wearing in pairs at both sides correspondence support pile 2
Anchor cable hole, by anchorage cable anchoring on support pile 2, is formed drawing anchoring system, and prestress anchorage cable 6, without free end box anchored end, props up
Watch box system is by carrying out prestressed stretch-draw respectively to prestress anchorage cable 6 two ends, and is anchored in pile body, forms one with support pile 2
Entirety, limits Rock And Soil 1 displacement, and its anchoring is reliable, it is possible to ensure that the safety of adjacent foundation pits side slope is with stable.It addition, pass through
The top of side support pile 2 is connected by crossbeam 3, is provided with breast boards 8 between stake, thus improves this between the most adjacent support pile 2
The structural strength of supporting construction.The present invention's is rational in infrastructure, simple to operate, easy to spread, has stronger economy and practicality
Property.
Present invention further propose that a kind of adjacent foundation pits to the construction method drawing cable bolting structure.
In this preferred embodiment, a kind of based on above-mentioned adjacent foundation pits to drawing the construction method of cable bolting structure, bag
Include following steps:
1) support pile position unwrapping wire, construction supporting stake 2 are carried out according to construction drawing；
The excavation of support pile 2 uses rotary drilling rig pore-forming, and the pore-forming of support pile 2 uses the sequence of construction of interval pore-forming, just completes
The support pile 2 of concreting is no less than 4 times of stake footpaths with the safe hole-making distance of adjacent stake holes, is no less than 36 interval time
Hour, support pile 2 stretches into the requirement of the degree of depth construction drawing to be reached of Rock And Soil 1；
2) construction crossbeam 3, links together the top of the support pile 2 of homonymy；
3) in construction intercepting ditch 4(the present embodiment, intercepting ditch 4 is 1.0m with the distance of support pile 2)；
4) Rock And Soil 1 on the left of support pile 2 and the Rock And Soil 1 on the right side of right side support pile 2 on the left of excavation；
After the concrete strength of support pile 2 reaches the 75% of design strength, then ground on the left of support pile 2 on the left of excavating
At excavation Rock And Soil 1, the step of the Rock And Soil 1 on the right side of body 1 and right side support pile 2, need to ensure that each excavation height cannot be greater than pre-
The vertical spacing of stress anchor cable 6；
5) getting out anchor hole 5 on support pile 2 and Rock And Soil 1, anchor hole 5 is lateral aperture；
Concrete employing boring machine gets out anchor hole 5 on support pile 2 and Rock And Soil 1, with reference to Fig. 3, uses total powerstation in boring procedure
Measure the exposing deviation and use electronics guide instrument to measure drill bit deviation in real time, to control the level side of anchor hole 5 of borer drill rod
Be not more than 20mm to the pitch-row error with vertical direction, degree of skewness is not more than 5%；
6) prestress anchorage cable 6 is positioned in anchor hole 5 (angle put into by anchor cable should keep consistent with the angle of anchor hole 55)；
7) anchor head 7 is installed in the both sides of anchor hole 5, by prestress anchorage cable 6 through anchor head 7；
8) prestress anchorage cable 6 is carried out stretch-draw in both sides simultaneously, the tension sequence of the prestress anchorage cable 6 of same level height be from
Middle to both sides stretch-draw；
When the concrete strength of all support piles 2 be all higher than 20Mpa and reach design strength 85% after, then carry out prestressing force
Anchor cable 6 carries out the step of stretch-draw；
9) after prestress anchorage cable 6 stretch-draw completes, excise unnecessary steel strand wires, with concrete, anchor head 7 is closed；
10) complete breast boards 8 between the stake within the excavation height of both sides to construct, and between stake, on breast boards 8, reserve spilled water hole 9；
In the present embodiment, control spilled water hole 9 flare 5%；
11) step 4) is repeated to 10), until having constructed；
12) arranging the 10(gutter, gutter 10 distance away from support pile 2 bottom foundation ditch is 0.5m).
The adjacent foundation pits that the present invention proposes to the construction method drawing cable bolting structure, it is ensured that Rock And Soil 1 and
The safety and stability of fender pile 2, construction method is simple, safe and reliable simultaneously.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilize this
The equivalent structure transformation that bright description and accompanying drawing content are made, or directly or indirectly it is used in other relevant technical fields, all
In like manner it is included in the scope of patent protection of the present invention.
Claims (10)
1. an adjacent foundation pits to drawing cable bolting structure, it is characterised in that include Rock And Soil, support pile, crossbeam, anchor
Breast boards between hole, prestress anchorage cable, anchor head and stake, wherein, described Rock And Soil be respectively provided on two sides with supporting one to one
Stake；The top of the same side support pile is linked together by described crossbeam；Described anchor hole is lateral aperture and runs through corresponding supporting
Stake and Rock And Soil；Described prestress anchorage cable is positioned in anchor hole；Described anchor head by prestressed cable anchorage on support pile；Biphase
It is provided with breast boards between stake between adjacent described support pile.
2. adjacent foundation pits as claimed in claim 1 to drawing cable bolting structure, it is characterised in that described support pile, horizontal stroke
Between beam and stake, breast boards is armored concrete.
3. adjacent foundation pits as claimed in claim 1 to drawing cable bolting structure, it is characterised in that breast boards between described stake
On be additionally provided with spilled water hole.
4. adjacent foundation pits as claimed in claim 1 to drawing cable bolting structure, it is characterised in that described prestress anchorage cable
Being made up of multi beam steel strand wires, described prestress anchorage cable is externally provided with plastic bushing, has concrete anchor pier between described anchor head and anchor hole.
5. adjacent foundation pits as claimed in claim 1 to drawing cable bolting structure, it is characterised in that described anchor head is externally provided with
Described anchor head and described prestress anchorage cable are closed by concrete.
6. the adjacent foundation pits as described in any one in claim 1 to 5 to drawing cable bolting structure, it is characterised in that
Also include the gutter being located at bottom foundation ditch and be located at the intercepting ditch at side slope top.
7. the construction to drawing cable bolting structure based on the adjacent foundation pits described in any one in claim 1 to 6
Method, it is characterised in that comprise the following steps:
1) support pile position unwrapping wire, construction supporting stake are carried out according to construction drawing；
2) construction crossbeam, links together the top of the described support pile of homonymy；
3) construction intercepting ditch；
4) Rock And Soil on the left of support pile and the Rock And Soil on the right side of the support pile of right side on the left of excavation；
5) getting out anchor hole on support pile and Rock And Soil, anchor hole is lateral aperture；
6) prestress anchorage cable is positioned in described anchor hole；
7) anchor head is installed in the both sides of anchor hole, by prestress anchorage cable through anchor head；
8) prestress anchorage cable carrying out stretch-draw in both sides simultaneously, the tension sequence of the prestress anchorage cable of same level height is therefrom
Between to both sides stretch-draw；
9) after prestressed anchor cable stretching completes, excise unnecessary steel strand wires, with concrete, anchor head is closed；
10) complete bulkhead construction between the stake within the excavation height of both sides, and between stake, on breast boards, reserve spilled water hole；
11) step 4) is repeated to 10), until having constructed；
12) gutter is set bottom foundation ditch.
8. adjacent foundation pits as claimed in claim 7 to the construction method drawing cable bolting structure, it is characterised in that use
Boring machine gets out anchor hole on support pile and Rock And Soil, and use total station survey borer drill rod in boring procedure exposes deviation also
Electronics guide instrument is used to measure drill bit deviation in real time, little to control the pitch-row error horizontally and vertically of anchor hole
It is not more than 5% in 20mm, degree of skewness.
9. adjacent foundation pits as claimed in claim 7 to the construction method drawing cable bolting structure, it is characterised in that the completeest
The support pile becoming concreting is no less than 4 times of stake footpaths with the safe hole-making distance of adjacent stake holes, and interval time is no less than
36 hours.
10. adjacent foundation pits as claimed in claim 7 to the construction method drawing cable bolting structure, it is characterised in that when
After the concrete strength of support pile reaches the 75% of design strength, then the Rock And Soil on the left of support pile and right side on the left of excavating
The step of the Rock And Soil on the right side of support pile；When the concrete strength of all support piles is all higher than 20Mpa and reaches design strength
After 85%, then carry out described prestress anchorage cable is carried out the step of stretch-draw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610777228.0A CN106320348A (en) | 2016-08-30 | 2016-08-30 | Opposite-pulling anchor cable supporting structure for adjacent deep foundation pits and construction method of opposite-pulling anchor cable supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610777228.0A CN106320348A (en) | 2016-08-30 | 2016-08-30 | Opposite-pulling anchor cable supporting structure for adjacent deep foundation pits and construction method of opposite-pulling anchor cable supporting structure |
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| CN106320348A true CN106320348A (en) | 2017-01-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130610A (en) * | 2017-05-24 | 2017-09-05 | 广州市第建筑工程有限公司 | A kind of construction method of deep foundation pit support |
| CN108331014A (en) * | 2018-04-24 | 2018-07-27 | 吉林建筑大学 | A kind of reserved bridge zone assembled barricade for reinforcing hole slot |
| CN108661062A (en) * | 2018-06-22 | 2018-10-16 | 中铁二院(成都)建设发展有限责任公司 | A kind of heavy cut ruggedized construction and construction method |
| CN111118993A (en) * | 2019-11-03 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Embankment high-cantilever bilateral road shoulder pile slab wall reinforcing structure and construction method |
| CN111749249A (en) * | 2020-07-23 | 2020-10-09 | 牛斌 | Building enclosure construction method for protecting existing building in foundation pit |
| CN113897973A (en) * | 2021-11-02 | 2022-01-07 | 中建八局第四建设有限公司 | Mutual-pulling type foundation pit support structure and construction method |
| CN114482072A (en) * | 2022-03-04 | 2022-05-13 | 西南交通大学 | Soft soil close-connection double-foundation-pit combined anchor design method, supporting structure and construction method |
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| JPH07252835A (en) * | 1994-03-15 | 1995-10-03 | Toda Constr Co Ltd | Construction method for diagonal shore strut |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130610A (en) * | 2017-05-24 | 2017-09-05 | 广州市第建筑工程有限公司 | A kind of construction method of deep foundation pit support |
| CN108331014A (en) * | 2018-04-24 | 2018-07-27 | 吉林建筑大学 | A kind of reserved bridge zone assembled barricade for reinforcing hole slot |
| CN108661062A (en) * | 2018-06-22 | 2018-10-16 | 中铁二院(成都)建设发展有限责任公司 | A kind of heavy cut ruggedized construction and construction method |
| CN111118993A (en) * | 2019-11-03 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Embankment high-cantilever bilateral road shoulder pile slab wall reinforcing structure and construction method |
| CN111749249A (en) * | 2020-07-23 | 2020-10-09 | 牛斌 | Building enclosure construction method for protecting existing building in foundation pit |
| CN111749249B (en) * | 2020-07-23 | 2022-03-08 | 北京城建设计发展集团股份有限公司 | Building enclosure construction method for protecting existing building in foundation pit |
| CN113897973A (en) * | 2021-11-02 | 2022-01-07 | 中建八局第四建设有限公司 | Mutual-pulling type foundation pit support structure and construction method |
| CN114482072A (en) * | 2022-03-04 | 2022-05-13 | 西南交通大学 | Soft soil close-connection double-foundation-pit combined anchor design method, supporting structure and construction method |
| CN114482072B (en) * | 2022-03-04 | 2023-01-31 | 西南交通大学 | Soft soil close-connection double-foundation-pit combined anchor design method, supporting structure and construction method |
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