Single-opening multi-protection cover tunnel construction method
A technology of tunnel construction and protective cover, which is applied in the direction of tunnel, tunnel lining, earthwork drilling and mining, etc. It can solve the problems of failure to take targeted measures in time and many accidents, and achieve easy processing and operation, simplified support, highly feasible effect
Active Publication Date: 2017-02-22
钟文英
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Problems solved by technology
There are also a lot of accidents caused by engineering geological disasters. This is caused by using the same construction methods without timely taking targeted treatment measures without knowing the bad geological conditions ahead.
Method used
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[0083] In order to further illustrate the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.
[0084] A kind of tunnel construction method of single hole and multiple protective covers, such as Figure 1~Figure 11 shown.
[0085] The single-hole multi-protection cover tunnel construction method is characterized in that it comprises the following steps:
[0086] Step 1: advance bolt, small conduit installation, grouting;
[0087] Step 2: Excavation of the protection push groove on one side of the level;
[0088] Step 3: The double-curved protective cover enters the protective propulsion slot in the second step;
[0089] Step 4: Level the other side to protect the excavation of the propulsion slot;
[0090] Step 5: The double-arc protective cover enters the step 4 protection push slot;
[0091] Ste...
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The invention provides a single-opening multi-protection cover tunnel construction method. The single-opening multi-protection cover tunnel construction method comprises the steps that advance anchor bolts and small conduits are installed and grouted; a protective advancing groove on one horizontal side is excavated; a double-arc-shaped protective cover is put in the protective advancing groove; a protective advancing groove on the other horizontal side is excavated; a double-arc-shaped protective cover is put in the protective advancing groove; a top protective advancing groove is excavated; a middle top protective cover is put in the protective advancing groove; an upper-middle step I portion is excavated; concrete is pneumatically placed; a reinforcing mesh is installed; a steel frame is installed, anchor rods are installed; the middle top protective cover is dismounted, and concrete is secondarily and pneumatically placed on the upper side of the protective cover; reinforcing stabilizing rods are installed, upper-middle steps are gradually excavated, and the reinforcing stabilizing rods are installed in time; the portions III and IV on two sides are respectively excavated; concrete is preliminarily and pneumatically placed on the outer sides of the portions III and IV on the two sides; a reinforcing mesh is installed; a steel frame is installed, anchor rods are installed; reinforcing stabilizing rods and the double-arc-shaped protective covers are respectively dismounted; concrete is secondarily and pneumatically placed on outer sides of the portions III and IV on the two sides.
Description
technical field [0001] The invention relates to tunnel construction technology, in particular to a single-hole multi-protection cover tunnel construction method. Background technique [0002] When passing through a variety of accumulation bodies, due to the loose structure, there is no or poor cementation between the particles, which will cause collapse after excavation. There are also many accidents caused by engineering geological disasters. This is caused by the use of the same construction methods without timely taking targeted treatment measures without knowing the adverse geological conditions ahead. The surrounding rocks in front of the tunnel face are broken, joints are developed, rocks are vertical, there are mud interlayers between rock layers, and fault zones appear in front. These unfavorable geology can easily lead to landslide accidents. Therefore, it is of great significance to develop a single-hole multi-shield tunnel construction method. Contents of the i...
Claims
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IPC IPC(8): E21D11/10E21D20/00E21D21/00
CPCE21D11/10E21D11/102E21D20/003E21D21/0093
Inventor 张延年周佳新汪青杰
Owner 钟文英