CN110188405A - Face concrete spraying support design method - Google Patents
Face concrete spraying support design method Download PDFInfo
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- CN110188405A CN110188405A CN201910382153.XA CN201910382153A CN110188405A CN 110188405 A CN110188405 A CN 110188405A CN 201910382153 A CN201910382153 A CN 201910382153A CN 110188405 A CN110188405 A CN 110188405A
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- face
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- stability
- tunnel
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- 239000004567 concrete Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000013461 design Methods 0.000 title claims abstract description 28
- 238000005507 spraying Methods 0.000 title claims abstract description 26
- 239000011378 shotcrete Substances 0.000 claims abstract description 23
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 abstract description 6
- 238000012407 engineering method Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The present invention provides a kind of face concrete spraying support design methods, belong to Tunnel Engineering field.In the face concrete spraying support design method, consider face failure mode under mechanization tunneling boring engineering method, and stress, the deformation behaviour of face gunite concrete, the face coefficient of stability calculation formula under gunite concrete is reinforced has been derived using limit equilibrium method, realizes tunnel tunnel face gunite concrete Quantitative design.
Description
Technical field
The present invention relates to Tunnel Engineering fields, in particular to a kind of face concrete spraying support design method.
Background technique
Face concrete spraying support is common advance support measure in current Tunnel Engineering, is advised currently without design
Model mostly determines supporting parameter according to engineering experience, lacks theory support, may cause that safety stock is larger or supporting parameter not
Foot threatens construction safety and results in waste of resources.
Summary of the invention
The embodiment of the invention provides a kind of face concrete spraying support design methods, it is intended to be intended to provide a kind of reality
The Quantitative design of existing face concrete spraying support parameter is face concrete spraying support parameter in Tunnel Engineering
It determines and theory support is provided.
In a first aspect, the embodiment of the present invention provides a kind of face concrete spraying support design method, including walk as follows
It is rapid:
Based on classical wedge-shaped body Model, the coefficient of stability K under face concrete spraying support measure is calculated, wherein false
If being constructed using full section method, whole destruction occurs for face, and it is broken that part occurs using micro- benching tunnelling method construction top bar face
It is bad, and failure mechanics are to be with horizontal direction angleStraight line, according to limit equilibrium method, the tunnel tunnel face is steady
Determine the calculation formula of COEFFICIENT K are as follows:
In formula 1, F1、F2Respectively face sphenoid skid resistance, sliding force, K are the face coefficient of stability；
Horizontal, the Vertical Static equilibrium condition according to face sphenoid, convolution 1 derive that face coefficient of stability K is counted
Calculate formula are as follows:
Fq=qB (Dcot θ0+ e) formula 8
In formula 2~9, [K] is face design stability coefficient；FcFor slide surface cohesive strength resultant force (N)；For sliding
Face frictional force resultant force (N)；FqFor pressure from surrounding rock resultant force (N) above face；Fw(N) is self-possessed for face slide mass；Q is country rock
Pressure (Pa)；B is face span (m)；D is face height (m), and when using micro- benching tunnelling method, D takes top bar face high
Degree；E is the non-supporting segment length (m) in tunnel；θ0Angle (°) is destroyed for face；γ is country rock severe (N/m3)；C is country rock cohesive strength
(Pa)；For country rock internal friction angle (°)；P1For face concrete spraying support power (N)；β1、β2、β3For withθ0It is relevant
Coefficient；
Wherein, face concrete spraying support power P1Calculation formula are as follows:
In formula 10, t is gunite concrete thickness (m)；R1For gunite concrete ultimate tensile strength (Pa)；
The embodiment of the invention provides a kind of face concrete spraying support design methods, wherein face stability series
Several calculation methods is to consider the change of the failure mode and face gunite concrete of mechanization tunneling boring construction face
Shape stress characteristic.The Quantitative design of face concrete spraying support parameter is realized, is face injection in Tunnel Engineering
Determining for concrete support parameter provides theory support.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is face extrusion deformation ideograph provided in an embodiment of the present invention；
Fig. 2 is face gunite concrete equivalent schematic provided in an embodiment of the present invention；
Fig. 3 is face gunite concrete computation model figure provided in an embodiment of the present invention.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, implement below in conjunction with the present invention
The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below to protect
The scope of the present invention of shield, but it is merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Embodiment
Big machinery tunneling boring engineering method has become the developing direction of Railway Tunnel engineering method.Full face tunneling is to enclosing
Rock disturbance number is few, process is simple, construction efficiency is high, but excavation area is big, the easy unstability of face, landslide, therefore complete at present disconnected
Face method is mainly used in I~III grade of country rock, main using traditional benching tunnelling method under the conditions of weak surrounding rock.Face gunite concrete
Supporting is common advance support measure in current Tunnel Engineering, mostly determines supporting parameter according to engineering experience, lacks theoretical branch
Support, may cause that safety stock is larger or supporting parameter is insufficient, and construction safety is threatened simultaneously to result in waste of resources.
Reasonable face concrete spraying support parameter, can effectively improve area face stability, can also reduce resource
The Quantitative design of face concrete spraying support parameter is realized in waste, is face gunite concrete branch in Tunnel Engineering
It protects determining for parameter and theory support is provided.
For this purpose, inventor proposes a kind of face concrete spraying support design method by long-term research and practice,
It is described in detail with reference to the accompanying drawing.
The embodiment of the invention provides a kind of face concrete spraying support design methods, include the following steps:
Based on classical wedge-shaped body Model, the coefficient of stability K under face concrete spraying support measure is calculated.
Where it is assumed that whole destruction occurs using full section method construction face, using micro- benching tunnelling method construction top bar palm
Local failure occurs for sub- face, and failure mechanics are to be with horizontal direction angleStraight line.
According to limit equilibrium method, the calculation formula of tunnel tunnel face coefficient of stability K are as follows:
In formula 1, F1、F2Respectively face sphenoid skid resistance, sliding force, K are the face coefficient of stability.
Horizontal, the Vertical Static equilibrium condition according to face sphenoid, convolution 1 derive that face coefficient of stability K is counted
Calculate formula are as follows:
Fq=qB (Dcot θ0+ e) formula 8
In formula 2~9, [K] is face design stability coefficient；FcFor slide surface cohesive strength resultant force (N)；For sliding
Face frictional force resultant force (N)；FqFor pressure from surrounding rock resultant force (N) above face；Fw(N) is self-possessed for face slide mass；Q is country rock
Pressure (Pa) can specifically be calculated according to " Design of Railway Tunnel specification " (10403-2016)；B is face span (m)；D is
Face height (m), when using micro- benching tunnelling method, D takes top bar face height；E is the non-supporting segment length (m) in tunnel；θ0For
Face destroys angle (°)；γ is that country rock severe (N/m3) can specifically be selected according to " Design of Railway Tunnel specification " (TB10403)
It takes；C is that country rock cohesive strength (Pa) can specifically choose according to " Design of Railway Tunnel specification " (TB10403)；For in country rock
Angle of friction (°) can specifically be chosen according to " Design of Railway Tunnel specification " (TB10403)；P1For face gunite concrete branch
It protects power (N)；β1、β2, β 3 be withθ0Relevant coefficient.
It should be noted that in the present invention, the calculation method of the face coefficient of stability is to consider mechanization tunneling boring
The failure mode of construction face and the deformation stress characteristic of face gunite concrete.
Common solidifying of the working face measure is to close face using gunite concrete in Tunnel Engineering, forms plate injection
After concrete structure, it is capable of providing certain supporting power, effectively prevent face part chip off-falling, improves area face stability.
Referring to Fig. 1, tunnel tunnel face extrusion deformation is mostly dome shape spherical shape extrusion deformation, due to gunite concrete and the palm
Sub- face compatible deformation, therefore, face concrete slab can be reduced to width be B, be highly D, fixed with a thickness of t, both ends,
By the beam of triangular load, Fig. 2, Fig. 3 are please referred to.
According to the stress characteristic of face gunite concrete plate, it can be concluded that, which easily generates tensile failure at center,
The maximum supporting power P that gunite concrete plate can be provided is obtained according to structural mechanics1Calculation formula.
Correspondingly, face concrete spraying support power P1Calculation formula are as follows:
In formula 10, t is gunite concrete thickness (m)；R1Specifically for gunite concrete ultimate tensile strength (Pa), it can press
According to " Design of Railway Tunnel specification " (TB10403) relevant regulations value.
It, can be by adjusting gunite concrete thickness t and gunite concrete ultimate tensile strength R in specific design1's
Parameter, gradually whether tentative calculation meets face design stability coefficient [K] requirement.
The embodiment of the invention provides a kind of face concrete spraying support design methods, wherein face stability series
Several calculation methods is to consider the change of the failure mode and face gunite concrete of mechanization tunneling boring construction face
Shape stress characteristic.The Quantitative design of face concrete spraying support parameter is realized, is face injection in Tunnel Engineering
Determining for concrete support parameter provides theory support.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of face concrete spraying support design method, which comprises the steps of:
Based on classical wedge-shaped body Model, face coefficient of stability K is calculated, wherein assuming that constructed using full section method, face hair
It is raw whole to destroy, local failure is occurred using micro- benching tunnelling method construction top bar face, and failure mechanics are and horizontal direction angle
ForStraight line, according to limit equilibrium method, the calculation formula of the tunnel tunnel face coefficient of stability K are as follows:
In formula 1, F1、F2Respectively face sphenoid skid resistance, sliding force, K are the face coefficient of stability.
Horizontal, the Vertical Static equilibrium condition according to face sphenoid, it is public that convolution 1 derives that face coefficient of stability K is calculated
Formula are as follows:
Fq=qB (Dcot θ0+ e) formula 8
In formula 2~9, [K] is face design stability coefficient；FcFor slide surface cohesive strength resultant force (N)；For slide surface friction
Power resultant force (N)；FqFor pressure from surrounding rock resultant force (N) above face；Fw(N) is self-possessed for face slide mass；Q is pressure from surrounding rock
(Pa)；B is face span (m)；D is face height (m), and when using micro- benching tunnelling method, D takes top bar face height；E is
The non-supporting segment length (m) in tunnel；θ0Angle (°) is destroyed for face；γ is country rock severe (N/m3)；C is country rock cohesive strength (Pa)；For country rock internal friction angle (°)；P1For face concrete spraying support power (N)；β1、β2、β3For withθ0Relevant coefficient；
Wherein, face concrete spraying support power P1Calculation formula are as follows:
In formula 10, t is gunite concrete thickness (m)；R1For gunite concrete ultimate tensile strength (Pa).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910382153.XA CN110188405A (en) | 2019-05-09 | 2019-05-09 | Face concrete spraying support design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910382153.XA CN110188405A (en) | 2019-05-09 | 2019-05-09 | Face concrete spraying support design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110188405A true CN110188405A (en) | 2019-08-30 |
Family
ID=67715923
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| CN201910382153.XA Pending CN110188405A (en) | 2019-05-09 | 2019-05-09 | Face concrete spraying support design method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203769804U (en) * | 2014-01-02 | 2014-08-13 | 中铁工程设计咨询集团有限公司 | Advanced support of inclined tunnel |
| JP2016017292A (en) * | 2014-07-07 | 2016-02-01 | 株式会社新輝 | Concrete blow-through prevention plate and concrete spraying method |
| CN108756943A (en) * | 2018-05-28 | 2018-11-06 | 湖南科技大学 | A kind of tunnel tunnel face support reinforcement Parameters design |
| CN109101775A (en) * | 2018-09-30 | 2018-12-28 | 北京工业大学 | A kind of shallow embedding shield tunnel stratum protuberance Limit Analysis considering excavation face local failure |
| US20200182718A1 (en) * | 2016-11-12 | 2020-06-11 | Soochow University | Method for calculating earth pressure load on a tunnel |
-
2019
- 2019-05-09 CN CN201910382153.XA patent/CN110188405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203769804U (en) * | 2014-01-02 | 2014-08-13 | 中铁工程设计咨询集团有限公司 | Advanced support of inclined tunnel |
| JP2016017292A (en) * | 2014-07-07 | 2016-02-01 | 株式会社新輝 | Concrete blow-through prevention plate and concrete spraying method |
| US20200182718A1 (en) * | 2016-11-12 | 2020-06-11 | Soochow University | Method for calculating earth pressure load on a tunnel |
| CN108756943A (en) * | 2018-05-28 | 2018-11-06 | 湖南科技大学 | A kind of tunnel tunnel face support reinforcement Parameters design |
| CN109101775A (en) * | 2018-09-30 | 2018-12-28 | 北京工业大学 | A kind of shallow embedding shield tunnel stratum protuberance Limit Analysis considering excavation face local failure |
Non-Patent Citations (2)
| Title |
|---|
| 关宝树: ""漫谈矿山法隧道技术第九讲――隧道开挖和支护的方法"", 《隧道建设》, vol. 36, no. 07, pages 771 - 781 * |
| 刘彦文: ""隧道掌子面稳定的几种解析方法"", 《中国科技信息》, no. 11, pages 79 - 80 * |
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