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Large-section chamber soft rock bottom plate foundation treatment method

A floor foundation and treatment method technology, which is applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve problems such as bottom heaving and cracking of the foundation, damage to the foundation of the winch installation, and increased maintenance costs. , to achieve the effect of reducing deformation, increasing bearing capacity and prolonging service life

Inactive Publication Date: 2020-12-22
HUATING COAL GRP
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Problems solved by technology

[0003] According to the original method of excavating C25, pouring, pouring anchor rods and other electromechanical chamber soft rock floor treatment methods, it cannot solve the problem of floor heaving and cracking of the soft rock floor foundation of the large-section winch chamber in Xinbai Coal Mine. Deformation and cracks will cause damage to the installation foundation of the winch, and there will be safety hazards during the lifting operation of the winch, which will also increase the maintenance cost in the later period

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  • Large-section chamber soft rock bottom plate foundation treatment method
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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0020] The method for treating the soft rock floor foundation of a large-section chamber includes the following steps:

[0021] S1: Excavate the anti-bottom arch foundation of the shell, and excavate the anti-bottom arch foundation of the winch chamber and the electric control chamber according to the design requirements;

[0022] S2: On the basis of excavation and formation, the steel bars are bound to the anti-bottom arch steel bar foundation according to the design requirements. The overlapping length of the steel bars is 500mm. The steel bars include the first steel bar 1, the second steel bar 2, the third steel bar 3, and the fourth steel bar 4 , No. 5 rebar 5, ...

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Abstract

The invention discloses a large-section chamber soft rock bottom plate foundation treatment method. The method comprises the following steps that a shell inverted arch foundation is excavated, and inverted arch foundations of a winch chamber and an electric control chamber are excavated according to design requirements; reinforcing steel bars are bound to an inverted arch reinforcing steel bar foundation on the basis of excavation forming according to design requirements; the inverted arch foundations are poured layer by layer, in the first layer, the inverted arch foundations are poured to the horizontal plane of a winch foundation through C25 concrete, and foundation bolt holes of the winch foundation are reserved; and in the second layer, the C25 concrete is used for pouring the remaining part of an inverted arch, so that the winch foundation and the inverted arch foundations are integrated, and after a macromolecule panel is laid on the winch chamber on the plane of a bottom plate,C20 concrete mortar is used for plastering and leveling. The passive stress state that the soft rock bottom plate is poor in stress and bearing capacity is solved, deformation of soft rock under thestress effect is reduced, the chamber foundation bearing capacity is increased, upheaval of the chamber bottom plate and the chamber wall is restrained, and the service life of the chamber is prolonged.

Description

technical field [0001] The invention relates to the technical field of coal mine transportation, in particular to a method for treating the foundation of a large-section chamber soft rock floor. Background technique [0002] The upper winch chamber of the coal mine rapid transportation channel is a super-large-section electromechanical chamber, and the lithology of the roof and floor is soft rock. The treatment method for the soft rock foundation is classified according to soft rock: low-strength soft rock, expansive soft rock, and high-stress soft rock. Rock, jointed soft rock and composite soft rock are classified and supported. The common support methods are: 1. Maintain and maintain the residual strength of the surrounding rock; 2. Improve the strength of the surrounding rock; 3. Grouting reinforcement. [0003] According to the original method of excavating C25, pouring, pouring anchor rods and other electromechanical chamber soft rock floor treatment methods, it cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/105E21D11/107
Inventor 赵华山貟彦章刘雪马伟陈卫东何如成杨树文赵前诗高智慧段正涛尚敏罗森吴永斌
Owner HUATING COAL GRP
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