Method for determining grouting amount for filling karst caves along shield tunnel in karst stratum

A technology of shield tunneling and determination method, applied in construction and other directions, can solve the problems of inability to determine the volume of karst caves, difficulty in measuring construction operations, and long time consumption.

CN106285636AActive Publication Date: 2017-01-04SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-01-04

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Abstract

The invention discloses a method for determining grouting amount for filling karst caves along a shield tunnel in a karst stratum, comprising the following steps: firstly, exploring geology of a construction site; secondly, determining a distribution condition of the karst caves along a tunnel according to a geological drilling result; thirdly, determining fractal parameters of karst cave distribution regularities; and fourthly, determining volume of the karst caves according to the fractal parameters, determining a karst cave grouting amount coefficient according to site grouting amount, and determining karst cave grouting amount of a site area. According to the method for determining the grouting amount for filling the karst caves along the shield tunnel in the karst stratum disclosed by the invention, defects of difficulty in measurement construction, long time consumption and unavailability in determining volume of karst caves in an area of an existing method are overcome, specific determining method and steps are provided, and the determination of the grouting amount for the karst caves along the shield tunnel in the karst stratum is realized.
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Description

technical field

[0001] The invention relates to a method in the technical field of underground engineering, in particular to a method for determining the amount of grout filling in karst caves along shield tunnels in karst strata. Background technique

[0002] With the continuous development of my country's underground engineering construction, a large number of high-speed railways, intercity railways, and urban rail transit are being built, and many tunnel projects need to be constructed in karst strata. The shield method is a commonly used tunnel construction method. Many construction accidents and geological disasters will occur when shield tunneling is carried out in the covered karst stratum covered with sandy soil and silty clay: ground slurry accidents, sinkhole disasters, shield tail grouting loss or failure resulting in excessive Subsidence and other engineering accidents, etc. The karst caves in the vicinity of the tunnel need to be treated before the constructio...

Examples

Embodiment Construction

[0053] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention. Operations that are not specifically described in this embodiment can be performed with reference to the methods already provided in the Summary of the Invention, and will not be repeated here.

[0054] The following is an embodiment of a method for determining the volume of a regional karst cave in a covered karst area.

[0055] A rail transit project is located in Guangzhou City, where covered karst is widely distributed, and the ground along the tunnel is urban traffic arterial roads, residential...