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Device and method for judging dig ability of shield cutter to boulders and hard rock bulges in soft soil

A technology of shield cutting tool and discriminating device, which is applied in the directions of measuring device, test machinability, soil material test, etc., can solve the problem of lack of feasibility discriminating device and method, and achieve the effect of avoiding the increase of cost and construction period.

Active Publication Date: 2022-04-12
CHINA RAILWAY LIUYUAN GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a lack of feasible discrimination devices and methods

Method used

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  • Device and method for judging dig ability of shield cutter to boulders and hard rock bulges in soft soil
  • Device and method for judging dig ability of shield cutter to boulders and hard rock bulges in soft soil

Examples

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Effect test

Embodiment 1

[0029] Embodiments of the present invention provide a device for discriminating excavability of shield cutters to boulders and hard rock protrusions in soft soil, such as figure 1 As shown, it includes a test piece box 4, a top reaction plate 5, a spring 6, a pressure plate 7, a cutter 12, a cutter rest 13, a pushing mechanism and a cutter power mechanism. The front of the test piece box 4 is provided with a cutting opening, and a rock test piece 1 , a filling medium 2 and a low-strength plain concrete wall 3 are placed in the inner cavity of the test piece box 4 . The low-strength concrete wall 3 is against the cutting edge, the rock specimen 1 is located behind the low-strength concrete wall 3, and the filling medium 2 is filled with the inner wall of the inner cavity and the rock specimen 1, the low-strength concrete between 3 concrete walls. The low-strength plain concrete wall 3 is arranged between the rock specimen 1 and the cutting edge to provide a flat surface for th...

Embodiment 2

[0034] Embodiments of the present invention provide a method for discriminating the excavability of boulders in soft soil by shield cutters, such as figure 2 shown, including the following steps:

[0035] S1: Lay sand material at the bottom of the inner cavity of the test piece box 4; use a high-strength large boulder on the engineering site as the rock test piece 1, put the rock test piece 1 simulating the boulder on the sand material, and put it close to the test piece At the cutting edge of the box 4; a low-strength plain concrete wall 3 is poured between the rock specimen 1 and the cutting edge.

[0036] S2: Fill the remaining space in the inner cavity of the test piece box 4 with sand, and cover the pressure plate 7; determine the earth pressure on the upper part according to the embedding depth of the boulder on the project site, and adjust the pressure of the top reaction plate 5 The position, compression spring 6, simulates the upper earth pressure on the boulder.

...

Embodiment 3

[0040] Embodiments of the present invention provide a method for judging the excavability of shield cutters to hard rock protrusions in soft soil, such as figure 2 shown, including the following steps:

[0041] S1: Lay mortar on the bottom of the inner cavity of the test piece box 4; use the hard rock protruding rock at the engineering site as the rock test piece 1, put the rock test piece 1 simulating the hard rock protruding on the mortar, and put it close to the test piece At the cutting edge of the box 4; a low-strength plain concrete wall 3 is poured between the rock specimen 1 and the cutting edge.

[0042] S2: Fill the remaining space in the inner cavity of the test piece box 4 with mortar.

[0043] S3: The jacking system 8 pushes the test piece box 4, and the test piece box 4 moves toward the tool 12; at the same time, the torque motor 16 is started to drive the transmission shaft 15 to rotate the tool holder 13, and the tool 12 follows the rotation, and the tool 12 ...

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Abstract

The invention provides a device for judging the dig ability of a shield cutter to boulder and hard rock bulges in soft soil, the device comprises a test piece box and the like, a cutting opening is formed in the front surface of the test piece box, a rock test piece, a filling medium and a low-strength plain concrete wall are placed in an inner cavity of the test piece box, and the test piece box is connected with a pushing mechanism; the tool rest right opposite to the cutting opening is arranged on the tool power mechanism, and a tool is arranged on the tool rest. The method comprises the following steps: placing a rock test piece in an inner cavity of the test piece box, and pouring a low-strength plain concrete wall at a cutting opening to fix the rock test piece; filling the residual space of the inner cavity of the test piece box with a filling medium; cutting the rock test piece by a cutter; monitoring the tunneling cutting speed and the like of the rock test piece; and judging the adaptability of the shield cutter under the adverse conditions that boulders are mixed with soft stratums or hard rock bulges and the like. According to the invention, the stress and constraint states of the boulder and the hard rock bulge in the soft soil can be truly reflected, the tunneling cutting of a shield cutter is simulated, and whether the boulder and the hard rock bulge in the soft soil have the tunneling property or not is accurately judged.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel construction and excavation, and in particular relates to a device and method for judging the excavability of boulders and hard rock protrusions in soft soil by shield cutters. Background technique [0002] There are many mountains, rivers, and bays in my country, and the geological conditions are complex and changeable. The mechanized construction of underground tunnels using the shield method is an urgent need for infrastructure construction. Sexuality has always been a technical problem in the industry. At present, there is a lack of feasible distinguishing devices and methods. Contents of the invention [0003] Aiming at the technical problems existing in the prior art, the present invention provides a device and method for judging the excavability of boulders and hard rock protrusions in soft soil by shield cutters, which can truly reflect the stress and stress of boulders and hard ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/58G01N3/24G01N33/24G01M13/00
Inventor 范国刚贺维国周华贵刘庆方曹威张茜
Owner CHINA RAILWAY LIUYUAN GRP CO LTD