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Determination method for primary support deformation grading control standard of V-grade surrounding rock tunnel benching method construction

A determination method and hierarchical control technology, which is applied in the fields of earthwork drilling, complex mathematical operations, geometric CAD, etc. It can solve the problems of inability to carry out precise control and lack of step-by-step control standards for the deformation of the initial branch of the tunnel.

Pending Publication Date: 2022-04-05
中交中南工程局有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the excavation and construction of Class V surrounding rock tunnels, it is necessary to determine the control standard for the initial branch deformation. The existing control standards for the excavation of Class V surrounding rock tunnels are mainly based on the reserved deformation. The step-by-step control standard of branch deformation leads to the inability to carry out precise control

Method used

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  • Determination method for primary support deformation grading control standard of V-grade surrounding rock tunnel benching method construction
  • Determination method for primary support deformation grading control standard of V-grade surrounding rock tunnel benching method construction
  • Determination method for primary support deformation grading control standard of V-grade surrounding rock tunnel benching method construction

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Embodiment 1

[0039] see figure 1 , a method for determining the grading control standard for primary support deformation in the construction of a V-level surrounding rock tunnel by a bench method, comprising the following steps

[0040] Step 1. Determine the amount of deformation reserved for tunnel excavation. During the construction period, monitor and measure points are arranged at different sections of the construction section to monitor the subsidence of the tunnel vault and the convergence of the tunnel circumference during the excavation of each step of the step method, and to monitor the The monitoring data is counted, and the normal distribution function is fitted to the monitoring data of tunnel vault subsidence and tunnel circumference convergence, and the variance and mean of the two sets of data are determined to determine the overall distribution of the sample, and the vault subsidence and hole circumference can be obtained. Weekly convergent normal distribution histogram an...

Embodiment 2

[0060] see Figures 2 to 11 A method for determining the grading control standard of primary support deformation in the construction of a V-level surrounding rock tunnel by the step method, taking the three-step method excavation construction of a V-grade soft rock large deformation tunnel passing through the fault fracture zone in the East Tianshan Mountains as an example, including the following steps:

[0061] 1Project overview

[0062] 1.1 Project introduction

[0063] The East Tianshan Super-Long Highway Tunnel is a control project for the construction of the G575 Baha Highway. The project is located in Hami, eastern Xinjiang Uygur Autonomous Region. The tunnel is 11,769.5m long and has a maximum buried depth of about 1,216m. It adopts a separate two-way four-lane and one-way traffic. The starting and ending stakes of the right tunnel of the tunnel are YK8+783~YK20+558, with a length of 11.775km, and the starting and ending stakes of the left tunnel are ZK8+809~ZK20+573,...

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Abstract

The invention discloses a V-grade surrounding rock tunnel benching method construction initial support deformation grading control standard determination method, which comprises the steps of determining tunnel excavation reserved deformation, determining excavation surrounding rock deformation proportions of all steps in a tunnel benching method, and determining the V-grade surrounding rock tunnel benching method construction initial support deformation grading control standard according to the planned excavation surrounding rock deformation proportions of all the steps in the tunnel benching method. And determining a V-grade surrounding rock tunnel benching method construction primary support deformation staged control standard. The V-grade surrounding rock benching method construction deformation control standard determination method has the beneficial effects that starting from the benching method construction characteristics, the purpose of dynamically controlling the deformation of the primary support can be achieved by setting the tunnel primary support deformation staged control standard.

Description

technical field [0001] The invention relates to a control standard for excavation deformation of a grade V surrounding rock tunnel, in particular to a method for determining a graded control standard for deformation of a primary branch in the step method construction of a grade V surrounding rock tunnel, and belongs to the technical field of mountain tunnel construction. Background technique [0002] The grade V surrounding rock tunnel is a passage specially designed for vehicle transportation. With the development of social economy and production, a large number of expressways have appeared, and higher standards have been put forward for the construction technology of roads, requiring straight lines, gentle slopes, and spacious pavements. Therefore, when the road passes through the mountainous area, the scheme of winding around the mountain in the past is mostly changed to the tunnel scheme. The construction of tunnels plays an important role in improving the technical sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20G06F17/18E21F17/18
Inventor 危皓薛江龙张帅李庆鑫周敏肖福磊陈鹏高梁金星苏鑫杨健康蒋友顺黄明利黄猛
Owner 中交中南工程局有限公司