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Indoor device and method for simulating construction disturbance soil of movable small-sized shield machine

An indoor device, shield machine technology, applied in teaching models, earth drilling, instruments, etc., can solve the problem that the staff cannot timely understand the soil disturbance.

Inactive Publication Date: 2020-02-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the staff cannot timely understand the soil disturbance in the current shield construction process, and provide an indoor device and method for simulating the disturbance of the soil during the construction of a mobile small shield machine, which can address multi-factor conditions Study on the Disturbance of Stratum by Lower Shield Construction

Method used

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  • Indoor device and method for simulating construction disturbance soil of movable small-sized shield machine
  • Indoor device and method for simulating construction disturbance soil of movable small-sized shield machine
  • Indoor device and method for simulating construction disturbance soil of movable small-sized shield machine

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specific Embodiment approach 1

[0017] Specific implementation mode 1: This implementation mode records a kind of indoor device for simulating mobile small shield machine construction disturbance soil, such as figure 1 As shown, the device includes a shield machine model, a shield machine power system, a test soil box and an upper loading system;

[0018] The shield machine model includes a cutter head 1 and a shield shell 2, the shield shell 2 is a hollow thin-walled pipe, and the cutter head 1 and the shield shell 2 are rotatably connected (an annular groove or The annular limit protrusion allows the shield shell to be stuck in the annular groove of the cutter head or the outside of the annular limit protrusion); the section of the shield shell 2 is circular; the cutter head 1 determines the opening ratio according to the actual shield machine cutter head , and set different excavation tools.

[0019] The stiffness and strength of the shield shell 2 are much greater than that of the soil, and it is necess...

specific Embodiment approach 2

[0023] Embodiment 2: The indoor device for simulating the disturbance of soil during the construction of a small mobile shield machine according to Embodiment 1. The material of the shield machine model is stainless steel.

specific Embodiment approach 3

[0024] Embodiment 3: The indoor device for simulating mobile small-sized shield machine construction disturbing soil described in Embodiment 1, the horizontal reaction force frame 3 and the vertical reaction force frame 8 are both steel frame structures, Both are fixed to the ground by bolts, which can prevent the reaction force frame from overturning, and the entire reaction force frame structure meets the requirements of structural mechanics.

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Abstract

The invention discloses an indoor device and method for simulating construction disturbance soil of a movable small-sized shield machine, belongs to the technical field of tunnel shield construction simulation, and aims to solve the problem that workers cannot know the disturbance condition of soil in time in the current shield construction process. The device comprises a shield machine model, a shield machine power system, a test soil box and an upper loading system, wherein a horizontal servo jack and a frequency conversion motor provide power for the shield machine model, and a vertical servo jack and an air pressure loading device provide soil layer stress environment; and a wet method is adopted to fill the test soil layer by layer in the test soil box, a sensor is further buried, then stress, displacement and excess pore pressure in the shield process are obtained, and a contour map along with shield tunneling is drawn, so that a disturbance range change of the soil, a shear expansion force influence range and a shear expansion force distribution rule are obtained. According to the device and the method, the disturbance of the shield construction to stratum can be researchedaccording to one or more factors of different overburden thicknesses, different water levels, different propelling forces, different cutter head rotating speeds, different cutter head types and the like.

Description

technical field [0001] The invention belongs to the technical field of tunnel shield construction simulation, and in particular relates to an indoor device and method for simulating soil disturbed by construction of a mobile small shield machine. Background technique [0002] A variety of complex site conditions will be encountered during the construction of shield tunneling. Due to the disturbance of shield tunneling and excavation, it is easy to cause a series of engineering problems. Especially in the condition of saturated sandy soil site, engineering disasters such as land subsidence and face instability are prone to occur, causing huge economic losses and personal injuries. Due to the great concealment of the on-site construction, the disturbance of the soil cannot be fed back to the staff in a timely and accurate manner. Therefore, the indoor model test has become a reliable research method for shield tunneling. However, the existing devices and methods pay more atte...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D9/08G09B25/02
CPCE21D9/06E21D9/0621E21D9/08G09B25/02
Inventor 唐亮孔祥勋凌贤长张隽赵香萍李自力郭波姚八五唐文冲张旺旺
Owner HARBIN INST OF TECH
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