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Control method for sedimentation deformation during underground excavation construction

A control method and technology in construction, applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as instability of excavation surface and hidden safety hazards, and achieve obvious effects and eliminate settlement factors.

Inactive Publication Date: 2015-12-30
何联帝 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above-mentioned pre-support measures have achieved good results in controlling the settlement, they have not completely solved all the problems causing the settlement. A certain degree of settlement and deformation will lead to instability of the excavation surface and cause certain safety hazards

Method used

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  • Control method for sedimentation deformation during underground excavation construction

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Embodiment Construction

[0017] The invention provides a control method for settlement deformation in underground excavation construction, that is, during the excavation process of the underground passage, after the working surface of the side wall steel grid is excavated, the jack is placed on the lower end of the steel grid in advance, and the After the steel grid is installed, pressurize the jack, apply proper pressure to the soil below the steel grid to be installed, and compact the soil. After the steel grid is installed, replace the original jack with an adjustable jack , so that the steel grid will not cause a large settlement due to placement on virtual soil or soil with low compressive strength.

[0018] It specifically includes the following steps: A. After excavating the side wall steel grid work surface, pre-install the jack on the soil below the position where the steel grid is to be installed; B. Install the steel grid above the jack; C. Wait for the steel grid to be installed. After the...

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Abstract

The invention discloses a control method for sedimentation deformation during underground excavation construction. The control method comprises steps as follows: A, after a side wall steel grating working face is excavated, a jack is placed in advance on a soil mass below the position where a steel grating is to be mounted; B, the steel grating is mounted above the jacket; C, after the steel grating is well mounted, pressure is applied to the jacket, and the soil mass is compacted; D, the jacket is removed, and adjustable jacking is used for replacing an original jacket and mounted in the location where the original jacket is located. By means of the control method, environmental soil mass sedimentation deformation in the construction process can be effectively avoided and controlled, the stability of an excavation face is kept, and construction safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for controlling settlement deformation in underground excavation construction. Background technique [0002] Shallow burial and undercover CRD construction is widely used in underground transportation, pipeline laying, especially urban subways, underground pipelines, underground power transmission and other fields. When the CRD method is used to excavate underground caverns, whether mechanical shield excavation or manual excavation is used, the initial lining structure of the cavern will more or less subside, which will affect the excavation of the cavern. The road above, the underground pipeline and the surrounding buildings will cause hazards. Therefore, controlling the settlement is an important goal pursued during the construction of the underground passage. [0003] In order to solve the above-mentioned settlement problems, various preventive measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/02
Inventor 何联帝李小川赵都都伏杰穆朝伟代生荣
Owner 何联帝