Construction method for basement of subway station

A construction method and technology for subway stations, applied in excavation, artificial islands, water conservancy projects, etc., can solve the problems of inconvenient excavation, increase construction costs, etc., and achieve the effects of reducing power consumption, high self-stabilization ability, and small deformation.

Active Publication Date: 2016-09-07
盐城恒久市政工程有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, if internal supports are installed inside the basement, it will not only increase the construction cost, but also bring great inconvenience to the excavation.

Method used

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  • Construction method for basement of subway station

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] In this embodiment, electroosmosis wells 2 are arranged on the outer edge of the basement support, and the electroosmosis wells 2 are evenly arranged along the outer edge of the basement support. , the well point tube is buried in the electroosmosis well 2 as the cathode, the slope protection pile 1 adopts the bored cast-in-place pile, the distance between the bored piles is 1.2m, the steel bar of the slope protection pile 1 is used as the anode, and the slope protection pile 1 and the electroosmosis well 2 The topsoil is covered with a plastic film. The basement support adopts two grading methods. The first grading is from the ground surface to the depth of 2 / 3 of the basement. The slope of the grading is 55°-70°. The composite lath 3 is short on the top and long on the bottom. The high-strength composite lath 3 is made into a circle with a diameter of 10mm...

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Abstract

The invention discloses a construction method for a basement of a subway station. The construction method is characterized in that electroosmosis wells are arranged on the outer edge of a basement support and are uniformly arranged along the outer edge of the basement support, and plastic films cover topsoil between slope protection piles and the electroosmosis wells; the basement support adopts a mode of setting side slopes twice, first side slopes are set at parts from the ground surface to the 2 / 3 depth of the basement, high-strength composite battens are arranged at the parts of the first side slopes, and the high-strength composite battens at the upper parts are shorter than the high-strength composite battens at the lower parts; second side slopes are set at parts from the 2 / 3 depth of the basement to the bottom of the basement; anchor rods are arranged at the parts of the second side slopes, and the downward dip angles of the anchor rods are gradually increased from top to bottom; the surface layers of the second side slopes adopt high-strength composite batten bamboo strip nets, and shotcrete is used as concrete on the surface layers; depressurization wells are arranged in the middle of the basement at an interval of every 12-15m, and the diameters of the depressurization wells are 600-700mm; concrete pipes are adopted for protecting walls; water filtering pipes are arranged in confined water parts, the outer sides of the water filtering pipes are wound by nylon gauze, and the water filtering pipes are filled with a 2-4mm pisolite filter material; and clay balls are used as a hole sealing material.

Description

technical field [0001] The invention relates to a basement support, in particular to a basement construction method of a subway station. Background technique [0002] With the development of our country's social economy, the construction of subway stations will inevitably cause the disturbance of the surrounding soil. When the displacement of the surrounding soil layer exceeds the limit range, it will endanger the safety of the surrounding buildings (structures). When the basement is excavated and dewatered, due to changes in the stress conditions of the soil, the soil around the basement will be displaced and the corresponding ground deformation will occur. At the same time, the basement support system will also be affected by the lateral water and soil pressure to generate internal force and deformation. In addition, if internal supports are installed inside the basement, it will not only increase the construction cost, but also bring great inconvenience to the excavation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E02D17/04
CPCE02D5/74E02D17/04E02D19/20E02D29/04E02D29/045
Inventor 孔志坚
Owner 盐城恒久市政工程有限公司
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