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Space reinforcing construction technology of sand layer roadway

A construction technology and roadway technology, which is applied in tunnels, tunnel linings, shaft linings, etc., can solve problems such as threats to the safety of ground structures, influence coal mine reconstruction and expansion plans, and irregular roadway sections, so as to reduce surrounding rock pressure and ground surface Settlement deformation, ensure technical feasibility and economic rationality, and ensure the effect of safety

Inactive Publication Date: 2013-05-08
SHAANXI COAL & CHEM CONSTR GRP CO LTD
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AI Technical Summary

Problems solved by technology

In the process of excavation and repair of sand layer roadway, silt and fine sand are very easy to suffer from stress release, and the roadway is prone to sand leakage and roof fall and slab accidents, resulting in irregular cross section of the roadway
This seriously affects the reconstruction and expansion plan of the coal mine, and also poses a greater security threat to the ground structures.

Method used

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  • Space reinforcing construction technology of sand layer roadway

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Embodiment Construction

[0029] The invention provides a construction technology for space reinforcement of a roadway in a sand layer. The construction technology comprises the following steps:

[0030] 1) Determine the scope of grouting reinforcement; the scope of grouting reinforcement is the entire section of the sand roadway.

[0031] 2) Holes are arranged within the determined grouting reinforcement range;

[0032] 2.1) Divide the grouting range of the full section of the roadway into areas; the area includes the peripheral eye area arranged along the outer contour line of the admiral design, the front eye area with a certain circumferential distance retracted along the outer contour line, and the inner eye area along the arch. Large-angle eye areas at certain intervals;

[0033] 2.2) Different holes are arranged in different areas.

[0034] in:

[0035] The specific implementation method of distributing holes in the peripheral eye area is: laying along the outer contour line of the admiral de...

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Abstract

The invention relates to space reinforcing construction technology of a sand layer roadway. The technology comprises the following steps of (1), determining a grouting reinforcing range; (2), distributing holes in the determined grouting reinforcing range; (3), constructing and drilling the holes in the positions distributed with the holes; and (4), inserting grouting guide tubes in the holes drilled and filling reinforcing grout. The space reinforcing construction technology of the sand layer roadway is capable of effectively control development of a surrounding rock plastic zone, reduces surrounding rock pressure acted on a supporting structure and settlement deformation of the ground surface and guarantees stability of a roadway operation face and safety of ground constructions.

Description

technical field [0001] The invention belongs to the field of construction, and relates to a reinforcement construction method, in particular to a space reinforcement construction technology of a sand roadway. Background technique [0002] With the rapid development of my country's economy and the vigorous implementation of the western development strategy, the construction of highways, railways, and energy coal mines in my country has ushered in an important period of rapid development, and civil engineering has inevitably come into contact with unfavorable engineering geological bodies such as fine sand strata . At present, there are more and more roadway (underground chamber) construction projects that pass through the sand layer, mainly including roadway construction in the process of new construction and expansion of coal mines in my country in recent years, railway and highway tunnel projects, and urban subway construction. [0003] At present, for the construction of v...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 王明智陈玄姚开元张超晖赵国超白凤忠
Owner SHAANXI COAL & CHEM CONSTR GRP CO LTD
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