Construction method for excavating weak surrounding rock tunnel by hydraulic breaking hammer

A technology of hydraulic breaker and weak surrounding rock, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of suboptimal construction methods, affecting the progress of the construction period, and many blasting times, so as to improve the working environment of workers and reduce the number of explosions. Surrounding rock weathering and high-quality lining

Active Publication Date: 2014-03-19
CHINA RAILWAY 23RD CONSTR BUREAU LTD
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  • Abstract
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Problems solved by technology

[0005] The construction method of weak blasting and short excavation has the characteristics of many blasting times and high frequency, which directly leads to the limitation of drilling and blasting construction, which seriou

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  • Construction method for excavating weak surrounding rock tunnel by hydraulic breaking hammer
  • Construction method for excavating weak surrounding rock tunnel by hydraulic breaking hammer
  • Construction method for excavating weak surrounding rock tunnel by hydraulic breaking hammer

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Embodiment Construction

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention. Some technical terms in the present invention are explained as follows, whichever is understood by those skilled in the art: "BPM" is an abbreviation of blows per minute, which refers to the number of air hammer blows per minute. "Procedure", also referred to as a step, all represent a small specific process flow segment in the present invention. "Top surface", the stepped platform formed between the upper pilot hole and the lower pilot hole is called the tunnel surface. According to the actual construction situation, filling, small side walls and secondary lining shall be...

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Abstract

The invention discloses a construction method for excavating a weak surrounding rock tunnel by a hydraulic breaking hammer. The construction method comprises upper pilot tunnel excavation, deslagging, primary supporting, lower left pilot tunnel excavation, deslagging, primary supporting, lower right pilot tunnel excavation, shortcut backfilling, primary supporting, inverted arch and cavern excavation, deslagging, and construction of inverted arches, filling, small sidewalls, secondary lining and the like. The construction method adopts dynamic monitoring, performs scientific construction organization, avoids blasting explosive use, generates small amount of dust, has superhigh adaptability and good control performance for overexcavation and under-excavation, is small in surrounding rock disturbance, and is high in lining and building quality, stability, reliability and security degree; and mechanical characteristics of the surrounding rock are closer to a design condition.

Description

technical field [0001] The invention relates to a construction method for excavating tunnels in weak surrounding rocks, in particular to a construction method for excavating tunnels in weak surrounding rocks with a hydraulic breaker. Background technique [0002] As a key project, node project and difficult project of railway civil construction, tunnels have always been valued by the industry. Although the current tunnel construction theory is mature, technology and equipment are advanced, and experience is rich. However, according to different geological conditions, how to choose the appropriate construction method or the best construction method has always been an important and difficult point in the research of various construction units. [0003] Weak argillaceous sedimentary rocks belong to Class III and IV weak surrounding rocks. The strength of the surrounding rocks is not high, and they are easy to swell and weather when exposed to water or weathered to clay when exp...

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Application Information

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IPC IPC(8): E21D9/00E21D11/00
Inventor 樊建国田宝华陈幼林倪修泉刘延龙王红霍莉
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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