CN208168898U - The compound advance support structure of Support System in Soft Rock Tunnels - Google Patents
The compound advance support structure of Support System in Soft Rock Tunnels Download PDFInfo
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- CN208168898U CN208168898U CN201820524583.1U CN201820524583U CN208168898U CN 208168898 U CN208168898 U CN 208168898U CN 201820524583 U CN201820524583 U CN 201820524583U CN 208168898 U CN208168898 U CN 208168898U
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- conduit
- pipe canopy
- support system
- leading truck
- soft rock
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- Excavating Of Shafts Or Tunnels (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model relates to the supporting construction of Support System in Soft Rock Tunnels, specially a kind of compound advance support structure of Support System in Soft Rock Tunnels comprising leading truck, conduit and Guan Peng, the leading truck are the I-steel arch of longitudinal pitch 70-80cm；One end of the conduit and pipe canopy and leading truck weld, and are arranged within the scope of 125-128 ° of tunnel vault, and conduit and pipe canopy are in a row spaced setting；The outer gunite concrete of leading truck forms guiding wall.The utility model is easy for construction, work efficiency is high, economic and reliable, the advance support problem that can effectively solve Support System in Soft Rock Tunnels；Make full use of steel arch-shelf as pipe canopy leading truck, it is easy for construction quick；Pipe canopy, conduit and type steel skeleton combination, it is hard and soft to develop simultaneously, it is preferable to the consolidation effect of weak surrounding rock；Tube shed grouting effect is good, to the self-curing of soft layer, improves supporting intensity；Economic and reliable, the advance support problem that can effectively solve Support System in Soft Rock Tunnels, can be widely popularized.
Description
Technical field
The utility model relates to the supporting construction of Support System in Soft Rock Tunnels, specially a kind of compound advanced branch of Support System in Soft Rock Tunnels
Protection structure.
Background technique
With the rapid development of our country's economy, China's items infrastructure be also evolving with it is perfect.Due to landform,
Domain is more complicated, just needs to build a large amount of tunnels when building the infrastructure such as highway, railway to meet production and life and require.
Tunnel construction inevitably encounters the adverse geological conditions such as soft stratum, tomography, joint, crack and weak intercalated layer；
The application and popularization of " New Austrian Tunneling Method " are so that supporting construction has been assigned new support idea, when tunnel passes through fractured weak zone,
Country rock and tunnel structure stress are complicated and changeable, displacement and mechanical change with the time be how to change be difficult to hold, construct wind
Danger is larger.
Advance support and preliminary bracing in tunnel are the critical processes of construction safety, according to the reinforcement measure pair taken
Advance support can be divided into stratum improved method and paid in advance and defended the doctrine by the influence of surrounding formation characteristic and stress distribution.Stratum improved method
The method for exactly improving excavation face surrounding formation soil characteristics, this method include slip casting, soil fixation, draining and Freezing stratum as rapid
Deng；Pay in advance defend the doctrine be exactly before tunnel excavation, first country rock is reinforced in advance, to increase the self-stable ability of country rock, and make out
Ambient stress interference in digging face reaches the smallest method.Advanced support method mainly includes：Pipe shed method, mechanical pre-cut grain method are pre- to serve as a contrast
Block method, horizontal jet grouting injection method, advanced tremie method, advance anchor bolt method, freezing process etc..Wherein pipe shed method, horizontal jet grouting injection
Stratum is also improved and strengthen to the method for protecting support such as method, tremie method simultaneously.
Practice have shown that advance support system can effectively limit surface subsidence, and comprehensively keep natural stratum in stabilization
Tunneling under state.Research shows that the 40%- of the entire settling amount of the 30%-40% and subsurface formations of the entire settling amount on ground
50% is occurred before effect takes place in general supporting, and advance support has the inhibitory effect of 30-35% to surface subsidence,
There is 40% inhibitory effect to tunnel top overlying strata (vault) sedimentation, so, the stratum for reinforcing front of tunnel heading is heavy to ground is inhibited
Drop has very important effect.Advance support technology as strengthening stratum, stablize vault and face, reduce the auxiliary of ground settlement
Construction is helped, oneself is had been widely used in underground engineering construction.
Steel tube shed supporting is generally used into hole supporting in tunnel construction at present, supporting generally uses advanced conduit branch in hole
Shield.For the tunnel of weak surrounding rock, requirement of engineering is had been unable to meet using advanced conduit supporting in hole, needs to cooperate horizontal jet grouting
The techniques such as slip casting, working procedure are cumbersome.
Summary of the invention
The utility model aims to solve the problem that the above problem, provides a kind of compound advance support structure of Support System in Soft Rock Tunnels, with super
Dummy pipe and hole inner tube canopy cooperate, and are aided with section-steel support, and adaptability is extensive, and construction is simple is convenient, and work efficiency is high.
According to the technical solution of the utility model, the compound advance support structure of Support System in Soft Rock Tunnels, including leading truck,
Conduit and Guan Peng, the leading truck are the I-steel arch of longitudinal pitch 70-80cm；One end and guiding of the conduit and pipe canopy
Frame welding, and be arranged within the scope of 125-128 ° of tunnel vault, conduit and pipe canopy are in a row spaced setting；Coagulation is sprayed outside leading truck
Soil forms guiding wall.
Further, the conduit and Guan Peng are arranged in parallel, and angle is 10-15 ° between conduit and pipe canopy and guiding wall.
Further, two rows of conduits are set between two adjacent comb canopies.
Further, the length of the conduit is 4.2-4.8m, diameter 40-44mm, circumferential spacing 48-52cm.
Further, the length of the pipe canopy is 12-14m, diameter 86-93mm, circumferential spacing 58-62cm.
Further, the pipe canopy drilling is using every number drilling, and conduit drilling is using by number drilling.
Further, backfilling cement mortar in the pipe canopy.
The beneficial effects of the utility model are：It is easy for construction, work efficiency is high, economic and reliable, can effectively solve weakness
The advance support problem of surrounding rock tunnel；Make full use of steel arch-shelf as pipe canopy leading truck, it is easy for construction quick；Pipe canopy, conduit and
Type steel skeleton combination, it is hard and soft to develop simultaneously, it is preferable to the consolidation effect of weak surrounding rock；Tube shed grouting effect is good, to soft layer
It is self-curing, improve supporting intensity；Economic and reliable, the advance support problem that can effectively solve Support System in Soft Rock Tunnels,
It can be widely popularized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the face A-A view in Fig. 1.
Fig. 3 is the face B-B view in Fig. 1.
Description of symbols：1- leading truck, 2- conduit, 3- pipe canopy, 4- are oriented to wall.
Specific embodiment
The utility model is described in further detail with attached drawing combined with specific embodiments below.
As shown in the figure：The compound advance support structure of the utility model Support System in Soft Rock Tunnels, including leading truck 1, conduit 2 and pipe
Canopy 3, the leading truck 1 are the I-steel arch of longitudinal pitch 70-80cm；One end of the conduit 2 and pipe canopy 3 and leading truck 1
Welding, and be arranged within the scope of 125-128 ° of tunnel vault, in a row interval is arranged for conduit 2 and pipe canopy 3；It is sprayed outside leading truck 1 mixed
Solidifying soil forms guiding wall 4, is oriented in wall 4 and is additionally provided with two linings.
Specifically, conduit 2 and pipe canopy 3 are arranged in parallel, angle is 10-15 ° between conduit 2 and pipe canopy 3 and guiding wall 4；Phase
Two rows of conduits 2, supporting knot better effect are set between two adjacent comb canopies 3.The length of conduit 2 is 4.2-4.8m, diameter 40-
44mm, circumferential spacing 48-52cm.The length of pipe canopy 3 is 12-14m, diameter 86-93mm, circumferential spacing 58-62cm.Pipe canopy 3
Drilling is using every number drilling, and the drilling of conduit 2 is using by number drilling.The backfilling cement mortar in pipe canopy 3.
Embodiment one：1 longitudinal pitch 75cm of leading truck, guiding wall 4 with a thickness of 26cm, be oriented to two liner thickness degree in wall 4
55cm；Conduit 2 and pipe canopy 3 are arranged within the scope of 126.468 ° of tunnel vault, and the length of conduit 2 is 4.5m, diameter 42mm, ring
To spacing 50cm；The length of pipe canopy 3 is 13m, diameter 89mm, circumferential spacing 60cm；It is arranged two between two adjacent comb canopies 3
Conduit 2 is arranged, spacing 9m between pipe canopy 3, spacing 3m between conduit 2.
Technical matters：
1）Leading truck inclusive type steel arch-shelf：Leading truck 1 is consistent using manufactured size and the production of preliminary bracing arch, installs 2 Pin.
Every Pin steelframe is locked foot anchor tube using 4 4m φ 42 and is reinforced, and the I-steel arch and lock foot anchor tube of leading truck 1 use U-typed reinforcing bar
Firm welding, and full slip casting（Lock foot anchor tube is not drawn into）；
2）Work surface is reinforced：Tunnel vault, which is taken, digs setting work surface and top country rock is more broken, exposed for a long time
After may generate collapsing, after the completion of work surface in time just spray C30 concrete strengthening country rock, then leading truck 1 is sprayed
It penetrates concrete and forms guiding wall 4；
3）Since tunnel surrounding is more broken, when drilling, first carries out top drilling construction, using by the way of number drilling, bores
Insertion steel pipe in time after the completion of hole, prevents collapse hole, the drilling of pipe canopy 3 is using by the way of number drilling, conduit 2 drills by number drilling
It can；
4）Steel pipe is filled using M10 cement mortar in pipe canopy 3, with reinforced pipe canopy intensity.
Claims (7)
1. the compound advance support structure of Support System in Soft Rock Tunnels, which is characterized in that including leading truck（1）, conduit（2）With pipe canopy（3）,
The leading truck（1）For the I-steel arch of longitudinal pitch 70-80cm；The conduit（2）With pipe canopy（3）One end and leading truck
（1）Connection, and be arranged within the scope of 125-128 ° of tunnel vault, conduit（2）With pipe canopy（3）In a row interval setting；Leading truck（1）
Trypsin method concrete forms guiding wall（4）.
2. the compound advance support structure of Support System in Soft Rock Tunnels according to claim 1, which is characterized in that the conduit（2）
With pipe canopy（3）It is arranged in parallel, conduit（2）With pipe canopy（3）With guiding wall（4）Between angle be 10-15 °.
3. the compound advance support structure of Support System in Soft Rock Tunnels according to claim 1 or 2, which is characterized in that adjacent two
Comb canopy（3）Between two rows of conduits are set（2）.
4. the compound advance support structure of Support System in Soft Rock Tunnels according to claim 1, which is characterized in that the conduit（2）
Length be 4.2-4.8m, diameter 40-44mm, circumferential spacing 48-52cm.
5. the compound advance support structure of Support System in Soft Rock Tunnels according to claim 1, which is characterized in that the pipe canopy（3）
Length be 12-14m, diameter 86-93mm, circumferential spacing 58-62cm.
6. the compound advance support structure of Support System in Soft Rock Tunnels according to claim 1, which is characterized in that the pipe canopy（3）
Drilling is using every number drilling, conduit（2）Drilling is using by number drilling.
7. the compound advance support structure of Support System in Soft Rock Tunnels according to claim 1, which is characterized in that the pipe canopy（3）
Interior backfilling cement mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820524583.1U CN208168898U (en) | 2018-04-12 | 2018-04-12 | The compound advance support structure of Support System in Soft Rock Tunnels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820524583.1U CN208168898U (en) | 2018-04-12 | 2018-04-12 | The compound advance support structure of Support System in Soft Rock Tunnels |
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| Publication Number | Publication Date |
|---|---|
| CN208168898U true CN208168898U (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820524583.1U Active CN208168898U (en) | 2018-04-12 | 2018-04-12 | The compound advance support structure of Support System in Soft Rock Tunnels |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578027A (en) * | 2019-01-14 | 2019-04-05 | 中铁十局集团有限公司 | Upper-soft lower-hard ground tunnel excavation support structure and tunnel excavation construction method |
| CN110318762A (en) * | 2019-07-25 | 2019-10-11 | 中冶建工集团有限公司 | Advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall |
-
2018
- 2018-04-12 CN CN201820524583.1U patent/CN208168898U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578027A (en) * | 2019-01-14 | 2019-04-05 | 中铁十局集团有限公司 | Upper-soft lower-hard ground tunnel excavation support structure and tunnel excavation construction method |
| CN110318762A (en) * | 2019-07-25 | 2019-10-11 | 中冶建工集团有限公司 | Advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall |
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