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A Control Method of Settlement Deformation in Underground Excavation Construction

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

Inactive Publication Date: 2018-04-13
何联帝 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Control Method of Settlement Deformation in Underground Excavation Construction

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Embodiment Construction

[0017] The present invention provides a method for controlling settlement deformation in underground excavation construction. During the excavation of underground passages, after excavating the side wall steel grille working surface, jacks are placed in advance on the lower end of the steel grille. After the steel grid is installed, pressurize the jack, apply appropriate pressure to the soil under the location where the steel grid is to be installed, and compact the soil. After the steel grid is installed, replace the original jack with an adjustable jack , So as not to cause the steel grid to be placed on the virtual soil or the soil with lower compressive strength and cause greater settlement.

[0018] Specifically include the following steps: A. After excavating the working surface of the side wall steel grating, a jack is pre-installed on the soil below the position where the steel grating is to be installed; B. The steel grating is installed above the jack; After the grille ...

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Abstract

The invention discloses a method for controlling settlement deformation in underground excavation construction, which includes the following steps: A. After excavating the steel grid working surface of the side wall, pre-installing a jack on the soil below the position where the steel grid is to be installed ; B. Install the steel grid above the jack; C. After the steel grid is installed, pressurize the jack to compact the soil; D. Remove the jack and replace the original jack with an adjustable jack. The invention can effectively avoid and control the settlement and deformation of the environmental soil in the construction process, maintain the stability of the excavation surface, and ensure the safety of construction.

Description

Technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for controlling settlement and deformation in underground excavation construction. Background technique [0002] Shallow buried and hidden CRD construction is widely used in underground transportation, pipeline laying, especially urban subway, underground pipeline, underground power transmission and other fields. When the CRD method is used to excavate the underground cavern, whether it is excavated by mechanical shield or manual excavation, the initial lining structure of the cavern will more or less undergo settlement, which will affect the excavation of the cavern. The above roads, underground pipelines and surrounding buildings cause hazards. Therefore, controlling settlement is an important goal pursued during the construction of underground passages. [0003] In order to solve the above settlement problem, people have taken a variety of preventive measur...

Claims

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Application Information

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Patent Type & Authority Patents(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