Method of treating tunnel collapse with roof-contacted shield support

Patent metadata

Field	Value
Publication number	US-11248464-B2
Application number	US-202017292074-A
Country	US
Kind code	B2
Filing date	Jul 20, 2020
Priority date	Mar 11, 2020
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A method of treating tunnel collapse includes mounting a shield plate, a column, a support column to form a combined support and moving the combined support onto an operation platform, lifting up the combined support, and enabling the height of canopy to be greater than the height of an initial supporting arch. Actively contacting a surface of a collapse cavity by a fixed support column and bearing a load, and lifting a movable support column to the top of the collapse cavity and bearing a load. Mounting an initial supporting arch, and welding the initial supporting arch with the support column. Removing a hydraulic prop after the support column contacting the initial supporting arch is cut off and the load of the shield plate is transferred to a supporting shed. Mounting an exhaust pipe and a filling material pumping pipe, and pumping a filling material into a collapse cavity space.

First claim

The invention claimed is:

1. A method of treating tunnel collapse with a roof-contacted shield support, comprising the following steps:
at step 1, fixedly mounting a column, a fixed support column, a movable support column, a transverse canopy and a longitudinal canopy on a shield plate to form a combined support, wherein an upper connection plate of the movable support column is fixed on an upper surface of the shield plate;
at step 2, leveling gravels below a collapse cavity to form an operation platform, and moving the combined support to be above the operation platform;
at step 3, transporting a single hydraulic prop to the operation platform, erecting and lifting up the single hydraulic prop to fit each single hydraulic prop with the transverse canopy or the longitudinal canopy;
at step 4, continuing lifting up the single hydraulic prop to enable heights of the transverse canopy, the longitudinal canopy, the shield plate and a guide pipe to be greater than a mounting height of an initial supporting arch; after the fixed support column contacts a surface of the collapse cavity, slowly increasing a bearing capacity of the single hydraulic prop to a rated working resistance, and then, locking a liquid supply valve;
at step 5, disposing a single hydraulic prop below the movable support column to fit a top cover of the single hydraulic prop with a lower connection plate of the movable support column, so as to continue lifting up the single hydraulic prop below the movable support column; after the upper connection plate of the movable support column contacts the surface of the collapse cavity, slowly increasing a bearing capacity of the single hydraulic prop to the a rated working resistance, and then, locking a liquid supply valve;
at step 6, erecting the initial supporting arch below the shield plate, and then connecting the initial supporting arches to form an initial supporting shed;
at step 7, fixing intersection points of the initial supporting arch and the column/the movable support column by welding, and cutting off the parts of the column and the movable support column within a contour of the initial supporting arch;
at step 8, after the single hydraulic props are removed, inserting a filling material pumping pipe into a reserved concrete hole of the shield plate, inserting an exhaust pipe into a reserved air hole, and hanging a metal net on the initial supporting arch; and
at step 9, spraying fast-setting concrete to the initial supporting arch, injecting a filling material into the collapse cavity through the filling material pumping pipe, and discharging air in the collapse cavity through the exhaust pipe until the collapse cavity is filled up with the filling material.

2. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein at step 1, the transverse canopy and the longitudinal canopy of the combined support are fixed on a lower surface of the shield plate, the fixed support column is fixed on the upper surface of the shield plate, the movable support column is penetrated through a guide hole on the shield plate and overlapped on the shield plate, and the column is fixedly supported on the lower surface of the shield plate.

3. The method of treating tunnel collapse with a roof-contacted shield support according to claim 2 , wherein one or more movable support columns are disposed on the shield plate, and the movable support column, the guide hole and the guide pipe are correspondingly arranged;
the contour size of the lower connection plate of the movable support column is less than a contour size of an inner wall of the guide pipe, and a toothed groove mated with a top cover of the single hydraulic prop is further disposed on the lower connection plate; a contour size of the upper connection plate of the movable support column is greater than a contour size of the guide hole, and the upper connection plate is fixed on the upper surface of the shield plate by bolts.

4. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein at step 2, the combined support is moved to be above the operation platform by using an excavator; or, the combined support is fixed on a motor vehicle which then moves onto the operation platform to complete the lifting-up of the combined support and the mounting of the initial supporting arch on the motor vehicle.

5. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein at step 3, an upper end of the single hydraulic prop is supported on the transverse canopy or the longitudinal canopy, and a lower end of the single hydraulic prop is fixed on the ground by a prop shoe; the prop shoe is fixedly connected by a rigid structure.

6. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein at step 4, after the fixed support column contacts the surface of the collapse cavity, the single hydraulic prop is adjusted and the fixed support column actively provides a supporting force for the collapse cavity; at step 5, after the movable support column contacts the surface of the collapse cavity, the single hydraulic prop is adjusted, and the movable support column actively provides a supporting force for the collapse cavity.

7. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein at step 6, when the single hydraulic prop occupies a mounting position of the initial supporting arch, an alternative single hydraulic prop is firstly erected at a position adjacent to the single hydraulic prop, and then, the single hydraulic prop occupying the mounting position of the initial supporting arch is removed.

8. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein after step 7 is completed, a load of the shield plate is transferred from the single hydraulic prop to the initial supporting arch.

9. The method of treating tunnel collapse with a roof-contacted shield support according to claim 1 , wherein at step 8, the exhaust pipe protrudes to the top of the collapse cavity, and the height of an outlet of the filling material pumping pipe is less than a height of a port of the exhaust pipe; at step 9, the fast-setting concrete is sprayed onto the initial supporting arch to form a closed shell.

Assignees

• Univ Shandong Science & Tech
• China Communications Construction Co Ltd
• Hebei Feipu Environmental Protection Tech Co Ltd
• Qingdao West Coast Rail Transit Co Ltd
• Qingdao First Municipal Eng Co Ltd

Inventors

• Xin Lin
• Jiang Shibin
• Yu Fu
• Wang Hailiang
• Li Weizhou
• Liu Quanwei
• He Wensheng
• Li Chuan
• Wang Zhenbiao
• Kong Biao
• Meng Xiangbao
• Zhang Yong
• Zhang Wenming
• Hou Lide
• Xiong Jiufang
• Xu Xuexiang
• Wang Shuai

Classifications

• E21D17/00 Primary

  Caps for supporting mine roofs · CPC title

• E21D11/18

  Arch members {; Network made of arch members (E21D11/36 takes precedence); Ring elements; Polygon elements; Polygon elements inside arches (caps for arches E21D17/00)} · CPC title

• E21D11/105 Primary

  Transport or application of concrete specially adapted for the lining of tunnels or galleries (in building E04F21/08, E04G21/02); Backfilling the space between main building element and the surrounding rock, e.g. with concrete · CPC title

• E21D15/44

  Hydraulic, pneumatic, or hydraulic-pneumatic props {(see also E21D15/51)} · CPC title

• E21D11/183

  Supporting means for arch members, not provided for in E21D11/22 · CPC title