Non-blasting construction method of hard-rock tunnel in city

A construction method and technology for tunnels, which are applied to tunnels, earth-moving drilling, mining equipment, etc., can solve the problems of inefficient short-distance tunnels, large investment, low work efficiency, etc. The effect of speeding up the construction progress

Inactive Publication Date: 2016-09-21
CRRC CONSTR ENG CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] For the non-explosive construction of hard rock tunnels, there are currently full-face tunnel boring machine (TBM) methods, cantilever boring machine methods, milling and excavating machine methods, splitting methods, hydraulic impact hammer methods, static crus

Method used

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  • Non-blasting construction method of hard-rock tunnel in city
  • Non-blasting construction method of hard-rock tunnel in city

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Embodiment Construction

[0015] A non-explosive construction method for urban hard rock tunnels, comprising the following three essential core steps:

[0016] Step 1. Cut out the outer contour groove with a chainsaw cutter in the horizontal direction along the designed tunnel excavation contour line to form a continuous closed air surface, such as figure 1 shown.

[0017] Step 2. Use the chain saw cutter to cut grooves and divide the tunnel surface in the horizontal direction according to the set track from the excavation contour line inward, and divide the tunnel surface into multiple small pieces, such as figure 2 As shown, it is convenient for the next step of crushing.

[0018] Step 3: Use the crushing head to further crush and remove the split rocks on the face of the face.

[0019] Preferably, in the second step, when the chainsaw cutter cuts the groove, the face is divided into interlaced mesh free surfaces, which has a better crushing effect; it can also be divided into other irregular piec...

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Abstract

The invention discloses a non-blasting construction method of a hard-rock tunnel in a city. The method comprises following steps: step 1, cutting an outer shell grove along the tunnel excavation contour in a horizontal direction with a chain saw cutter in order to form a continuously-enclosed free face; step 2, utilizing the chain saw cutter to inwardly cut the cutting groove in a horizontal direction according to the set trajectory on the tunnel face and dividing the tunnel face into multiple small blocks; step 3, utilizing a crush head to crush and remove fragmented rocks on the tunnel face. The method of utilizing the chain saw cutter and the crushing head is taken for mechanically excavation. Therefore, construction speed is quickened and input in tunneling cost and equipment is reduced. In the complex situation in the city, the construction method is applied to the hard-rock tunnel so that safety, reliably and efficiency are obtained; no influence is caused to the ambient environment and residents living in the ground; easy control of overbreak of the tunnel around is obtained; and the construction method is convenient and easy to promote.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, and is particularly suitable for non-explosive construction of urban hard rock tunnels. Background technique [0002] In recent years, with the accelerated pace of urbanization in the country, subway and highway projects in large and medium-sized cities in China are setting off a new round of construction climax. In the complex environment of the city, most of the newly-built tunnels are located in areas passing through existing roads, pipelines, and buildings (structures). Considering the impact of blasting construction on surface residents and buildings (structures), in order to ensure the safety and With social stability, non-explosive construction has become an indispensable construction method. [0003] For the non-explosive construction of hard rock tunnels, there are currently full-face tunnel boring machine (TBM) methods, cantilever boring machine methods, milling and excavat...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/10
CPCE21D9/00E21D9/10
Inventor 王猛刘化宽张艳艳
Owner CRRC CONSTR ENG CO LTD
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