CN106968258A - The cunicular foundation pit supporting construction of foundation pit side-wall - Google Patents
The cunicular foundation pit supporting construction of foundation pit side-wall Download PDFInfo
- Publication number
- CN106968258A CN106968258A CN201710367569.5A CN201710367569A CN106968258A CN 106968258 A CN106968258 A CN 106968258A CN 201710367569 A CN201710367569 A CN 201710367569A CN 106968258 A CN106968258 A CN 106968258A
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- prestress anchorage
- anchorage cable
- support pile
- wall
- Prior art date
- 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.)
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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 present invention relates to pattern foundation pit supporting structure field, disclose the cunicular foundation pit supporting construction of foundation pit side-wall, support pile and multiple prestress anchorage cables being respectively arranged above and below tunnel including being embedded in the rock-soil layer close to foundation pit side-wall, prestress anchorage cable includes the Anchoring part for being anchored at rock-soil layer and the outer anchor freely stretched section, the end of outer anchor section connection Anchoring part, the Anchoring part of prestress anchorage cable obliquely arranges that the outer anchor section of prestress anchorage cable is connected with support pile.When carrying out foundation pit supporting project, prestress anchorage cable is respectively arranged with above and below tunnel, so as to be anchored to rock-soil layer above and below tunnel；Support pile is embedded in the rock-soil layer close to foundation pit side-wall, and support pile can bear lateral thrust；Support pile coordinates with tunnel upper and the prestress anchorage cable of lower section plays support action, and this support pattern reduces engineering support cost, while form of construction work is simple and efficient, so as to reduce the duration of engineering.
Description
Technical field
The present invention relates to foundation pit supporting construction field, the more particularly to cunicular foundation pit supporting construction of foundation pit side-wall.
Background technology
Pattern foundation pit supporting structure is to ensure the safety of Underground Construction and foundation ditch surrounding enviroment, to foundation pit side-wall and surrounding enviroment
Supporting and retaining system, reinforcing and the safeguard measure of use.
At present, pattern foundation pit supporting structure largely adds the supporting scheme of prestress anchorage cable using drilling campshed, when pattern foundation pit supporting structure is met
When having tunnel to foundation pit side-wall, then can not construct prestress anchorage cable, cause design for change scheme of having to.
In the prior art, typically it is changed to drilling campshed and adds inner support scheme, still, inner support scheme cost mistake
Height, and construction inconvenience, cause the duration longer.
The content of the invention
It is an object of the invention to provide the cunicular foundation pit supporting construction of foundation pit side-wall, it is intended to solves base in the prior art
Hole supporting runs into tunnel and passed through, and causes the problem of supporting cost is too high, construction is inconvenient, the duration is longer.
The present invention is achieved in that the cunicular foundation pit supporting construction of foundation pit side-wall, including is embedded in close to foundation pit side-wall
Rock-soil layer support pile and multiple prestress anchorage cables being respectively arranged above and below tunnel, the prestress anchorage cable
Including the Anchoring part for being anchored at rock-soil layer and the outer anchor freely stretched section, the end of the outer anchor section connection Anchoring part, institute
The Anchoring part for stating prestress anchorage cable obliquely arranges that the outer anchor section of the prestress anchorage cable is connected with the support pile.
Further, along foundation ditch to the bearing of trend of rock-soil layer, the prestress anchorage cable is downwardly inclined arrangement；It is the multiple
Prestress anchorage cable includes high inclination-angle prestress anchorage cable and small inclination prestress anchorage cable, the inclination of the high inclination-angle prestress anchorage cable
Angle is more than the angle of inclination of the small inclination prestress anchorage cable.
Further, the small inclination prestress anchorage cable is arranged in tunnel upper, the high inclination-angle prestress anchorage cable arrangement
Below tunnel.
Further, the outer anchor section passes through the support pile, extends to outside the support pile.
Further, the part that the outer anchor section is extended to outside the support pile is connected with outer anchor head, and the outer anchor head is supported
The support pile is connected on towards on the surface of foundation ditch.
Compared with prior art, when carrying out foundation pit supporting project, the present invention is set respectively above and below tunnel
Prestress anchorage cable, by applying prestressing force, is anchored to tunnel upper and lower section ground, and prestress anchorage cable is mutual not up and down
Influence its anchoring effect；Support pile is embedded in the rock-soil layer close to foundation pit side-wall, and support pile can bear lateral thrust, support pile and tunnel
Prestress anchorage cable above and below road is combined, and reaches the purpose of pattern foundation pit supporting structure.Combined by prestress anchorage cable with support pile
Support pattern, supporting cost is reduced, form of construction work is simple and efficient, so as to reduce the duration of engineering.
Brief description of the drawings
Fig. 1 is the cunicular foundation pit supporting construction schematic front view of foundation pit side-wall provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The same or analogous part of same or analogous label correspondence in the accompanying drawing of the present embodiment；In description of the invention
In, it is to be understood that if having the orientation or position relationship of the instructions such as term " on ", " under ", "left", "right" for based on accompanying drawing institute
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than indicate or imply signified dress
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore described in accompanying drawing position relationship use
Language being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent, for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term is understood as the case may be.
The realization of the present invention is described in detail below in conjunction with specific embodiment.
Shown in reference picture 1, preferred embodiment is provided for the present invention.
Foundation pit side-wall has the foundation pit supporting construction in tunnel 20, including support pile 10 and multiple prestress anchorage cables, support pile
10 can bear the safety of lateral thrust, protection path 20 and base pit engineering, and prestress anchorage cable can apply pressure to rock stratum, so that right
Unstable rock mass is anchored.
Prestress anchorage cable includes one end and is anchored at the outer anchor section 50 that the Anchoring part 40 and the other end of rock-soil layer are freely stretched, branch
Fender pile 10 is embedded in the rock-soil layer close to foundation ditch bottom, can be to carrying out supporting around foundation ditch bottom and foundation ditch bottom, because foundation pit side-wall has tunnel
Road 20, so prestressing force cannot pass through tunnel 20, otherwise influences whether the safety of tunnel 20, so multiple prestress anchorage cables distinguish cloth
It is placed in above and below tunnel 20.
In order to increase the anchoring effect and scope of prestress anchorage cable, prestress anchorage cable Anchoring part 40 inclines along the radial direction of support pile 10
Tiltedly it is anchored at competent bed, the outer extension connection support pile 10 of anchor section 50, can be compared with so on the premise of the safety of tunnel 20 is not influenceed
The anchoring scope of big increase prestress anchorage cable.
In practical work process, support pile 10 is embedded in the rock-soil layer close to foundation pit side-wall, and support pile 10 can bear transverse direction
The safety of thrust, protection path 20 and base pit engineering；Prestress anchorage cable, prestressing force are set respectively above and below tunnel 20
The Anchoring part 40 of anchor cable is anchored at hard rock-soil layer, and outer anchor section 50 is extended from by tensioning to opposite direction, when to prestress anchorage cable
When applying prestressing force, prestress anchorage cable is anchored to unstable rock mass above and below tunnel 20, prestress anchorage cable up and down
It is combined with support pile 10, so that the foundation ditch for having tunnel 20 to foundation pit side-wall carries out supporting.
In order to strengthen the anchoring effect of prestress anchorage cable, multiple prestress anchorage cables include high inclination-angle prestress anchorage cable 70 and
Small inclination prestress anchorage cable 60, high inclination-angle prestress anchorage cable 70 and the angle of inclination of the formation of support pile 10 are more than small inclination prestressing force
Anchor cable 60；Because foundation pit side-wall has tunnel 20, prestress anchorage cable cannot pass through tunnel 20, otherwise tunnel 20 can be influenceed to pacify
Entirely, therefore, small inclination prestress anchorage cable 60 is arranged at the top of tunnel 20, and the Anchoring part 40 of small inclination prestress anchorage cable 60 is anchored at
Hard rock-soil layer, outer anchor section 50 is extended from being connected to support pile 10 by tensioning to opposite direction, and high inclination-angle prestress anchorage cable 70 is set
It is placed in the lower section of tunnel 20, the Anchoring part 40 of high inclination-angle prestress anchorage cable 70 is anchored at hard rock-soil layer, outer anchor section 50 is to negative side
To extending from being connected to support pile 10 by tensioning, small inclination prestress anchorage cable 60 cooperates with high inclination-angle prestress anchorage cable 70,
Make above and below the position of tunnel 20 that prestress anchorage cable spacing is smaller, increase its anchoring effect.
In the present embodiment, support pile 10 is provided with outer anchor head 30, and outer anchor head 30 is connected to the support pile 10 close to foundation ditch bottom
The surface of side, outer anchor head 30 can make what prestress anchorage cable was connected with support pile 10 more to consolidate, and prestressing force will not arbitrarily be offset,
So as to influence the anchoring effect of prestress anchorage cable.
In the present embodiment, the Anchoring part 40 of high inclination-angle prestress anchorage cable 70 is anchored at the rock-soil layer of fastening, high inclination-angle prestressing force
The outer anchor of anchor cable 70 section 50 extends outwardly through support pile 10 and is attached with outer anchor head 30, anchor in small inclination prestress anchorage cable 60
The rock-soil layer that section 40 is anchored at fastening, the outer anchor of small inclination prestress anchorage cable 60 section 50 pass through support pile 10 and with the outer anchor head 30
It is attached, the benefit so set is to make small inclination prestress anchorage cable 60 and high inclination-angle prestress anchorage cable 70 and support pile 10
More consolidating for connection, makes its difficult for drop-off and loosens, and increases integrally-built usage cycles, extends the use longevity of total
Life.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. the cunicular foundation pit supporting construction of foundation pit side-wall, it is characterised in that including being embedded in the rock-soil layer close to foundation pit side-wall
Support pile and multiple prestress anchorage cables being respectively arranged above and below tunnel, the prestress anchorage cable include being anchored at
The Anchoring part of rock-soil layer and the outer anchor section freely stretched, the end of the outer anchor section connection Anchoring part, the prestressed anchor
The Anchoring part of rope obliquely arranges that the outer anchor section of the prestress anchorage cable is connected with the support pile.
2. the cunicular foundation pit supporting construction of foundation pit side-wall as claimed in claim 1, it is characterised in that along foundation ditch to rock-soil layer
Bearing of trend, the prestress anchorage cable is downwardly inclined arrangement；The multiple prestress anchorage cable includes high inclination-angle prestress anchorage cable
And small inclination prestress anchorage cable, the angle of inclination of the high inclination-angle prestress anchorage cable is more than the small inclination prestress anchorage cable
Angle of inclination.
3. the cunicular foundation pit supporting construction of foundation pit side-wall as claimed in claim 2, it is characterised in that the small inclination in advance should
Power anchor cable is arranged in tunnel upper, and the high inclination-angle prestress anchorage cable is arranged in below tunnel.
4. the cunicular foundation pit supporting construction of foundation pit side-wall as described in claim 1-3 any one, it is characterised in that described
Outer anchor section passes through the support pile, extends to outside the support pile.
5. the cunicular foundation pit supporting construction of foundation pit side-wall as claimed in claim 4, it is characterised in that the outer anchor section extension
Outer anchor head is connected with to the part outside the support pile, and the outer anchor head is connected to the support pile towards on the surface of foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367569.5A CN106968258B (en) | 2017-05-23 | 2017-05-23 | Foundation pit supporting structure with tunnel on side wall of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367569.5A CN106968258B (en) | 2017-05-23 | 2017-05-23 | Foundation pit supporting structure with tunnel on side wall of foundation pit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106968258A true CN106968258A (en) | 2017-07-21 |
| CN106968258B CN106968258B (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710367569.5A Active CN106968258B (en) | 2017-05-23 | 2017-05-23 | Foundation pit supporting structure with tunnel on side wall of foundation pit |
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| CN (1) | CN106968258B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826207A (en) * | 2019-04-04 | 2019-05-31 | 深圳宏业基岩土科技股份有限公司 | The cable bolting structure of dislocation lap joint |
| CN110130361A (en) * | 2019-05-14 | 2019-08-16 | 广州地铁设计研究院股份有限公司 | It is a kind of for protecting the foundation pit supporting construction and its construction method of subway tunnel structure |
| CN112030980A (en) * | 2020-07-25 | 2020-12-04 | 郭梅芳 | Foundation pit supporting structure with tunnel on side wall of foundation pit and using method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202989932U (en) * | 2012-12-05 | 2013-06-12 | 昆明理工大学 | H-shaped double-row pile structure with large inclined angle prestressed anchor cables |
| CN206941603U (en) * | 2017-05-23 | 2018-01-30 | 深圳宏业基岩土科技股份有限公司 | The cunicular foundation pit supporting construction of foundation pit side-wall |
-
2017
- 2017-05-23 CN CN201710367569.5A patent/CN106968258B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202989932U (en) * | 2012-12-05 | 2013-06-12 | 昆明理工大学 | H-shaped double-row pile structure with large inclined angle prestressed anchor cables |
| CN206941603U (en) * | 2017-05-23 | 2018-01-30 | 深圳宏业基岩土科技股份有限公司 | The cunicular foundation pit supporting construction of foundation pit side-wall |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826207A (en) * | 2019-04-04 | 2019-05-31 | 深圳宏业基岩土科技股份有限公司 | The cable bolting structure of dislocation lap joint |
| CN109826207B (en) * | 2019-04-04 | 2024-02-09 | 深圳宏业基岩土科技股份有限公司 | Staggered lap joint anchor cable supporting structure |
| CN110130361A (en) * | 2019-05-14 | 2019-08-16 | 广州地铁设计研究院股份有限公司 | It is a kind of for protecting the foundation pit supporting construction and its construction method of subway tunnel structure |
| CN112030980A (en) * | 2020-07-25 | 2020-12-04 | 郭梅芳 | Foundation pit supporting structure with tunnel on side wall of foundation pit and using method |
| CN112030980B (en) * | 2020-07-25 | 2021-11-16 | 上海铁能建设工程有限公司 | Foundation pit supporting structure with tunnel on side wall of foundation pit and using method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106968258B (en) | 2020-04-28 |
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