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Double-channel underground chamber construction method

A technology for underground chambers and construction methods, which is applied to underground chambers, earthwork drilling, mining equipment, etc., can solve the problems of low construction efficiency, high cost, poor safety, etc. The effect of work efficiency

Inactive Publication Date: 2018-07-31
浙江省隧道工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the disadvantages of high cost, low construction efficiency and poor safety in the construction of underground chambers in the prior art, the present invention provides a double-channel underground chamber construction method

Method used

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  • Double-channel underground chamber construction method
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  • Double-channel underground chamber construction method

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Embodiment 1

[0042] Construction methods for double-channel underground chambers, such as Figure 1-3 shown, proceed as follows:

[0043] (1) Construction preparation;

[0044] (2) Measurement and stakeout;

[0045] (3) Excavation of the lower pilot tunnel of the chamber: the lower pilot tunnel is excavated along the central axis of the chamber along the central axis of the chamber from the entrance and exit of the chamber. The excavation of the tunnel adopts the conventional drilling and blasting method, and the YT-28 rock drill is used for drilling. Hexagonal hollow finished drill rod, One-shaped alloy drill bit. The blasthole depth is 2.3m, and the excavation cycle footage is 2.1m. The blasting adopts 2# rock emulsified industrial explosives, connected by non-electric plastic detonating tube, and the detonator detonates.

[0046] (4) Drilling of the pilot hole of the chute;

[0047] (5) Reverse expansion of pilot well;

[0048] (6) Excavation of chamber blind wells: arrange th...

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Abstract

The invention relates to the field of engineering construction and discloses a double-channel underground chamber construction method. The double-channel underground chamber construction method comprises the following steps that (1) construction preparation is conducted; (2) measuring and setting out are conducted; (3) a chamber lower guiding chamber is excavated, specifically, the lower guiding chamber communicating with a chute is excavated along the center axis of the chamber from a chamber inlet-outlet gate way channel, and the excavation section of the guiding chamber is the same as the section of the chamber inlet-outlet channel in size; (4) chute guiding holes are drilled; (5) a guiding well is excavated for expansion in the reverse direction; (6) chamber blind raises are excavated;(7) a chamber upper guiding chamber is excavated, specifically, with a chamber arching line as a bottom plate, an upper guiding chamber communicating with the three blind raises are tunneled along the axis of a crushing chamber; and (8) a chamber arched part is excavated, specifically, through the upper guiding chamber, an arched part cutting groove is excavated above the blind raise in the middle of the chamber, the through the constructed arched part cutting groove, tunneling is conducted from the middle to the two ends of the chamber, and smooth surface blasting is conducted to form an arched part. The double-channel underground chamber construction method has the effects that the total excavation cost of the chamber is recued, and the construction period is shortened.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a double-channel underground chamber construction method. Background technique [0002] Underground chambers refer to structures that are artificially excavated or naturally exist in rock and soil for various purposes. With the continuous improvement of our country's scientific and technological level and the continuous acceleration of the urbanization process, the underground chamber project is not only in the field of traditional mines, national defense, hydropower, Changsha Expressway (Railway) and other field projects, but also goes deeper, larger, and more comprehensive. The complex direction is further developed, and at the same time, it is more and more widely used in the development of urban underground spaces such as rail transit, underground parking lots, underground comprehensive utility corridors, and underground civil air defense. Large-scale underground cham...

Claims

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Application Information

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IPC IPC(8): E21D13/02
CPCE21D13/00
Inventor 张恩山厉建华吴立根赵艳军王金军郭红里
Owner 浙江省隧道工程集团有限公司
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