CN-121977152-A - Low-intrusion forced centering bracket for tunnel and mounting method thereof

CN121977152ACN 121977152 ACN121977152 ACN 121977152ACN-121977152-A

Abstract

The invention discloses a forced centering bracket for a tunnel with low intrusion limit and an installation method thereof, belonging to the technical field of tunnel safety monitoring, and comprising two right-angle connecting plates, two supporting rods, a top plate and a forced centering base, wherein the right-angle connecting plates are composed of a first vertical plate and a second vertical plate which are mutually vertical; the second vertical plate of the right-angle connecting plate above is horizontally connected with the top plate, the top plate is partially positioned in the refuge hole, the partial part of the top plate protrudes out of the side wall of the positive hole, the forced centering base is arranged on the top plate and used for installing measuring instruments to automatically monitor a plurality of tunnel sections in the front and rear areas of the corner, two supporting rods are arranged between the two sides of the top plate and the right-angle connecting plate below and used for improving the bending resistance and vibration resistance of the top plate and ensuring the stability of the forced centering support.

Inventors

YANG HUI
HE LINHUI
CAO CHENGDU
TENG HUANLE
WANG ZUOYU
ZHAO TIANWEI
LI KUNPENG

Assignees

中铁第四勘察设计院集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. The utility model provides a centering support is forced in tunnel of low limit of invading installs in the perpendicular corner of the refuge hole lateral wall of tunnel and positive hole lateral wall, its characterized in that includes: the two right-angle connecting plates are arranged at intervals along the extending direction of the corner, each right-angle connecting plate comprises a first vertical plate and a second vertical plate which are perpendicular to each other, one end of the first vertical plate is fixedly connected to the middle part of the second vertical plate, and the second vertical plate is divided into a first connecting part and a second connecting part; The first connecting part can be attached to the side wall of the vehicle-avoidance hole and can be detachably connected, and the second connecting part protrudes out of the side wall of the positive hole; The top plate and the two support rods are arranged on one side, away from the first vertical plate, of the second vertical plate; the top ends of the two support rods are respectively hinged with the two lateral sides of the top plate, and the bottom ends of the two support rods are respectively hinged with the second vertical plate of the right-angle connecting plate below; And the forced centering base is arranged on the top plate and is used for installing a measuring instrument so that the measuring instrument can monitor the tunnel section of the front and rear areas of the corner.
2. The forced centering bracket for the tunnel with low intrusion limit according to claim 1, further comprising two outer vertical plates, wherein the two outer vertical plates are respectively arranged on one sides of the two second vertical plates, which are away from the first vertical plate, the top plate is horizontally connected to the side wall surface of the upper outer vertical plate, which is away from the second vertical plate, and the bottom ends of the two supporting rods are respectively hinged to the lower outer vertical plate; the first connecting parts of the two second vertical plates are provided with first through holes, and the second connecting parts are provided with second through holes; Each outer vertical plate is provided with a third through hole and a fourth through hole which respectively correspond to the first through hole and the second through hole, the outer vertical plates are detachably connected with the second vertical plates through fasteners penetrating through the corresponding through holes, and The second through hole and the fourth through hole are waist-shaped holes extending along the width direction of the corresponding riser plate surface.
3. The low intrusion tunnel forced centering bracket according to claim 2, wherein the first and third through holes are each a waist-shaped hole extending in a length direction of a corresponding riser panel surface.
4. The low intrusion tunnel forced centering bracket according to claim 2, wherein each of the outer risers has a third connection portion extending beyond the second riser and the third connection portion is detachably connected to the side wall of the vehicle shelter to strengthen the connection of the outer riser to the side wall of the vehicle shelter and to improve the stability of the overall structure.
5. The forced centering bracket for tunnel with low intrusion according to claim 4, wherein a pad is fixedly provided at a connection portion of each third connection portion with the side wall of the vehicle-shelter, and the pad is fitted between the side wall of the vehicle-shelter and the third connection portion when the third connection portion is connected with the side wall of the vehicle-shelter.
6. The tunnel forced centering support with low limit of intrusion according to any one of claims 2 to 5, wherein two supporting seats are fixedly arranged on the outer vertical plate below, and bottom ends of the two supporting rods are hinged with the two supporting seats in a one-to-one correspondence mode respectively.
7. The low intrusion tunnel forced centering bracket according to claim 6, wherein the top and/or bottom ends of the support bar are hinged to the top plate and/or the support base by means of pins, and the ends of the pins are provided with adjustable-tightness bolts for locking the relative positions of the support bar and the top plate and/or the support base after the hinge angle of the support bar and the top plate and/or the support base is adjusted in place, thereby limiting the hinge rotation.
8. The low intrusion tunnel forced centering bracket according to any one of claims 1-5, wherein both the support bars are of a telescopic structure.
9. The low intrusion tunnel forced centering bracket according to any one of claims 1-5, wherein the right angle connection plate, the top plate, the support bar and the forced centering base are all made of stainless steel or hot dip galvanized steel material.
10. A method for installing a low intrusion tunnel forced centering bracket according to any one of claims 1 to 9, comprising the steps of: (1) Entering a tunnel at the time of a 'skylight point' of railway operation, and determining the position of a vehicle-avoiding hole of a forced centering bracket to be installed according to a region to be monitored; (2) Cleaning the side wall of the vehicle-avoiding hole at the installation position the surface of the side wall of the positive hole; (3) The right-angle connecting plate of the forced centering bracket is tightly attached to the corners of the side wall of the refuge tunnel and the side wall of the positive tunnel, and is adjusted to a proper height so as to ensure that the measuring instrument can monitor all areas to be monitored; (4) Marking drilling positions on the side wall of the shelter and the side wall of the main tunnel according to the joint position of the first vertical plate on the side wall of the main tunnel and the joint position of the first connecting part of the second vertical plate on the side wall of the shelter; (5) Drilling holes at each mark by using an electric hammer, and placing anchor bolts after cleaning the holes; (6) And positioning the bracket corresponding to each anchor bolt, screwing up the nuts, and firmly fixing the bracket on the tunnel structure.

Description

Low-intrusion forced centering bracket for tunnel and mounting method thereof Technical Field The invention belongs to the technical field of tunnel safety monitoring, and particularly relates to a low-intrusion forced centering bracket for a tunnel and an installation method thereof. Background In order to ensure the structural safety of a railway tunnel, particularly an operation railway in construction engineering adjacent construction, the convergence deformation of the inner wall of the existing tunnel structure needs to be monitored continuously for a long time, and a total station automatic monitoring method which is convenient to implement, efficient and economical is generally adopted, namely, a plurality of monitoring sections are distributed in a concerned region in the tunnel, and the total station is installed to automatically monitor the periodic horizontal displacement and vertical displacement of the monitoring sections. At present, the automatic monitoring work of the structural displacement of the railway tunnel is generally carried out by installing a forced centering bracket on the side wall of the tunnel, then installing a total station on the bracket, wherein the installed total station generally protrudes about 45cm from the inner wall, and the running safety of a train is generally not influenced for the railway tunnel with larger safety space between the building limit and the locomotive vehicle limit. However, when facing railway tunnels with small safety spaces between certain building and rolling stock boundaries, the safety spaces often are insufficient to accommodate total stations, i.e. installed total stations can intrude into the rolling stock boundaries, and other monitoring methods, such as optical fiber sensors, etc. that are more costly to implement must be employed. Disclosure of Invention Aiming at one or more of the defects or improvement demands of the prior art, the invention provides a low-intrusion forced centering bracket for a tunnel and an installation method thereof, which can greatly reduce the size of intrusion of a measuring instrument into the limit of a tunnel building, reserve more safety space and ensure the driving safety of a train. In order to achieve the above object, the present invention provides a low intrusion forced centering support for a tunnel, which is installed at a vertical corner of a side wall of a vehicle-shelter and a side wall of a main tunnel of the tunnel, comprising: the two right-angle connecting plates are arranged at intervals along the extending direction of the corner, each right-angle connecting plate comprises a first vertical plate and a second vertical plate which are perpendicular to each other, one end of the first vertical plate is fixedly connected to the middle part of the second vertical plate, and the second vertical plate is divided into a first connecting part and a second connecting part; The first connecting part can be attached to the side wall of the vehicle-avoidance hole and can be detachably connected, and the second connecting part protrudes out of the side wall of the positive hole; The top plate and the two support rods are arranged on one side, away from the first vertical plate, of the second vertical plate; the top ends of the two support rods are respectively hinged with the two lateral sides of the top plate, and the bottom ends of the two support rods are respectively hinged with the second vertical plate of the right-angle connecting plate below; And the forced centering base is arranged on the top plate and is used for installing a measuring instrument so that the measuring instrument can monitor the tunnel section of the front and rear areas of the corner. The invention further comprises two outer vertical plates, wherein the two outer vertical plates are respectively arranged on one sides of the two second vertical plates, which deviate from the first vertical plate, the top plate is horizontally connected to the side wall surface of the upper outer vertical plate, which deviates from the second vertical plate, and the bottom ends of the two supporting rods are respectively hinged to the lower outer vertical plate; the first connecting parts of the two second vertical plates are provided with first through holes, and the second connecting parts are provided with second through holes; Each outer vertical plate is provided with a third through hole and a fourth through hole which respectively correspond to the first through hole and the second through hole, the outer vertical plates are detachably connected with the second vertical plates through fasteners penetrating through the corresponding through holes, and The second through hole and the fourth through hole are waist-shaped holes extending along the width direction of the corresponding riser plate surface. As a further improvement of the present invention, the first through hole and the third through hole are each a waist-shaped hole exten