Construction method for tunneling excavation through matching of down-the-hole drill and breaking hammer

A construction method and down-the-hole drilling technology, which are applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of increasing excavation time, slowing down excavation speed, and having a large impact on surrounding environmental protection, so as to improve construction efficiency and save construction. Cost and effect of reducing construction difficulty

Active Publication Date: 2019-02-01
CHINA COMM 2ND NAVIGATIONAL BUREAU 2ND ENG +1
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Problems solved by technology

[0003] One is the excavation using conventional crawler-type breakers, that is, according to the tunnel excavation contour line measured and set out, the crawler-type breakers are used to excavate directly in the surrounding rock of the tunnel face. The advantage of this method is that the construction vibration Small, less impact on surrounding houses, low cost, simple constructi

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  • Construction method for tunneling excavation through matching of down-the-hole drill and breaking hammer
  • Construction method for tunneling excavation through matching of down-the-hole drill and breaking hammer
  • Construction method for tunneling excavation through matching of down-the-hole drill and breaking hammer

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[0045] Example 1

[0046] Such as Figure 1~6 As shown, the construction method of down-the-hole drilling and breaking hammer excavation is applied to Zengjiayan Bridge, which connects Chongqing Jiangbei District and Yuzhong District and is located between Jialing River Bridge and Huanghuayuan Bridge. Due to the large number of old residential houses around the construction channel, To ensure the safety of construction, adopt the construction of mechanical development tunneling method.

[0047] It has been tested that the 5 surrounding rocks of the tunnel face of the pilot tunnel are grade III, mainly sandstone and sandy mudstone, with good integrity. The uniaxial compressive strength of rock reaches 70MPa. As the pilot tunnel penetrates the old factory area of ​​the Chang'an Factory, the precision processing factory, and the Chang'an Hospital, the impact of construction vibration is relatively high.

[0048] The construction method of down-the-hole drill and breaker excavation in...

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Abstract

The invention discloses a construction method for tunneling excavation through matching of a down-the-hole drill and a breaking hammer. The construction method comprises the following steps that firstly, peripheral outline holes, slotting holes and breaking holes are formed in a tunnel face through a total station, and marks are made; secondly, the track-type hydraulic down-the-hole drill is utilized for drilling, according to the drilling sequence, the peripheral outline holes are drilled firstly, the slotting holes are formed in middle areas of a lower-middle section of the tunnel face, andthe breaking holes are formed in the rest part of the tunnel face; and thirdly, the breaking hammer is utilized to break the tunnel face from bottom to top in the vertical direction, the area with thedense hole pitch in the lower portion is broken firstly, a free face is dug out, then upward excavation is conducted layer by layer, and breaking is conducted according to the sequence of bottom, top, left, right and periphery. Interference to peripheral buildings is reduced, construction noise is controlled, tunneling of a tunnel body is accelerated, the design goal is achieved, and significantsocial benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of tunnel construction. More specifically, the present invention relates to a construction method for excavation with a down-the-hole drill combined with a breaking hammer. Background technique [0002] Due to the limitation of surface land area, the development of underground space has received more and more attention. As a typical example of the development and utilization of underground space, urban tunnels have made great contributions to alleviating urban traffic congestion. For urban tunnels surrounded by dense buildings, old houses, shallow tunnel burial depth, good surrounding rock integrity, and high environmental protection requirements, mechanical excavation is generally used for excavation; the current tunnel mechanical excavation method There are the following types: [0003] One is the excavation using conventional crawler-type breakers, that is, according to the tunnel excavation contour line measure...

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Application Information

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IPC IPC(8): E21D9/10
CPCE21D9/106
Inventor 刘小勇范波张世杰李仕绪许家齐
Owner CHINA COMM 2ND NAVIGATIONAL BUREAU 2ND ENG
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