Synchronous Grouting Dynamic Compensation Filling Control Method for Local Overbreak Area of Shield Excavation
A technology of synchronous grouting and dynamic compensation, applied in the field of geotechnical engineering, can solve the problems of difficulty in guaranteeing construction results and lack of real-time performance, and achieve the effects of speeding up the progress of shield tunneling operations, improving overall construction efficiency, and reducing human errors
Active Publication Date: 2018-07-06
TONGJI UNIV
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Problems solved by technology
The most important purpose of the shield tail grouting is to fill the shield tail gap in time, prevent the ground from being deformed due to the existence of the shield tail gap, and improve the impermeability of the tunnel; however, the final effect of the shield tail grouting is affected by various construction parameters. The formulation of various parameters in the shield tail grouting operation in the prior art lacks real-time and accuracy, which makes it difficult to guarantee the construction effect
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Embodiment Construction
[0026] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.
[0027] figure 1 It is the operation diagram of the over-excavation prediction link (system). Firstly, the theoretical unearthed volume is obtained through calculation, and then combined with the excavated volume of the soil body excavated by the shield machine screw conveyor and the excavated volume of the soil bucket to obtain the initial unearthed volume. Evaluate the severity of overbreak according to the specific construction requirements of this project; then analyze the monitoring data of the pressure sensor of the shield piston, and obtain the orientation information of the overbreak area through the comparison of the pressure monitoring data of adjacent pistons at the same time; finally, the comprehensive overbreak degree Evaluation and positioning analysis results form decision-making information, which is transmitted to the grouting ...
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The invention discloses a synchronous grouting and dynamic compensation filling control method for a shield tunneling-cutting local overexcavation area. The method includes the two links which are the overexcavation pre-judging link and the grouting parameter control link. In the overexcavation pre-judging link, qualitative judgment of the overexcavation circumstance of the construction area is conducted, and information is transmitted to the grouting parameter control link. In the grouting parameter control link, various conditions are combined so as to adjust various construction parameters of shield tail grouting, and real-time and accurate control is realized. According to the shield tail grouting parameter adjusting method which has the advantages that real-time monitoring is achieved, adjustment is fast, and manpower cost is low, ground surface settlement caused by tunneling shield operation is effectively controlled, and negative influences on road surfaces and surrounding buildings are reduced.
Description
technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a dynamic compensation and filling control method for synchronous grouting in a local over-excavation area of shield excavation. Background technique [0002] The shield method is a fully mechanized construction method in the underground excavation method. It propels the shield machine in the ground, and supports the surrounding rock through the shield casing and segments to prevent collapse into the tunnel. At the same time, a cutting device is used to excavate the soil in front of the excavation face, transported out of the hole by excavation machinery, jacked in the rear by a jack, and assembled with prefabricated concrete segments to form a mechanized construction method of the tunnel structure. The shield machine is not only a construction machine tool, but also a strong temporary support structure. The shield machine looks like a large steel pipe machine ...
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IPC IPC(8): E21D9/06E21D11/10
CPCE21D9/003E21D9/06E21D9/0607E21D11/105
Inventor 周顺华季昌张骁宫全美程茜唐黎明
Owner TONGJI UNIV