Unfavorable formation prediction method based on shield tunneling parameters

A technology of tunneling parameters and prediction methods, which is applied to earthwork drilling, mining equipment, tunnels, etc., which can solve the problems of heavy construction workload, high cost, and long construction period, and achieve the effects of low cost, avoiding severe damage, and simple operation

Active Publication Date: 2019-08-02
SHIJIAZHUANG TIEDAO UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

These methods have a large construction workload, long construction period and high cost. Due to the existence of drilling spacing, there may often be missed inspections.

Method used

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  • Unfavorable formation prediction method based on shield tunneling parameters
  • Unfavorable formation prediction method based on shield tunneling parameters
  • Unfavorable formation prediction method based on shield tunneling parameters

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0020] See attached fi...

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Abstract

The invention discloses a method for predicting unfavorable formations based on shield tunneling parameters, comprising the following steps: S1, data collection; S2, determining the specific energy of shield tunneling: the energy required for shield tunneling per unit volume; S3, determining the correction ratio Can predict the model, SM=K p log e (s×L(v n ))+C; S4. Input the obtained tunneling parameters into the specific energy prediction model to obtain the corrected specific energy value of the shield tunneling formation, and judge whether it is a poor rock formation; S5. According to the output corrected specific energy value, judge the shield tunneling For the method of crossing the boulder stratum, when the corrected specific energy value is less than 1, the method of directly pushing the shield through the boulder stratum is adopted; when the corrected specific energy value continues to be greater than 1.5, the boulder needs to be broken, which is divided into ground treatment and In-hole processing; the invention only uses the shield tunneling parameters recorded in real time by the PDV data acquisition system to accurately judge the existence of boulders in the stratum through which the shield tunnels, with simple operation and low cost, effectively avoiding missed inspections, and ensuring the safety of shield tunneling .

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a method for predicting unfavorable formations based on shield tunneling parameters. Background technique [0002] With the development of rail transit, the number of shield tunnels has gradually increased, and various problems have also been encountered in the process of shield tunneling construction. One of the biggest problems is that when the excavation process encounters bad strata with boulders, it is difficult to excavate and the settlement is difficult to control. . In some cities in my country, such as Guangzhou, Shenzhen, Dongguan, Zhuhai, Xiamen, Fuzhou, etc., it was found that there were boulders in the stratum during geological survey and shield construction. Under the normal excavation state of the shield machine, the efficiency is high and the controllability is good. Once encountering a boulder, it will cause problems such as difficulty in excavation, un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06
CPCE21D9/06
Inventor 郭京波杨绍普王旭东李代勇赵雪萍王杜娟李杰潘存治智小慧梁晓
Owner SHIJIAZHUANG TIEDAO UNIV
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