CN107036588B

CN107036588B - Tunnel surrounding rock displacement monitoring measuring point device

Info

Publication number: CN107036588B
Application number: CN201710023853.0A
Authority: CN
Inventors: 周元铺; 周元江; 张学富; 周子寒; 刘士洋
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2017-01-13
Filing date: 2017-01-13
Publication date: 2023-01-17
Anticipated expiration: 2037-01-13
Also published as: CN107036588A

Abstract

The invention provides a tunnel surrounding rock displacement monitoring and measuring point device which comprises a screw rod and a thin iron ring connected to one end of the screw rod, wherein the thin iron ring is divided into an upper thin iron ring and a lower thin iron ring along the axial direction, a circular thin iron sheet is embedded between the upper thin iron ring and the lower thin iron ring, two sides of the thin iron sheet are respectively pasted with a reflector plate, a cross wire is arranged on each reflector plate, the other end of the screw rod is conical, a layer of metal expansion pipe is wrapped on the outer surface of the screw rod, a crack is formed in one end, far away from the thin iron ring, of each metal expansion pipe along the axial direction of the metal expansion pipe, a nut is sleeved on the screw rod, close to the thin iron ring, of each metal expansion pipe, and a base plate is arranged between the nut and the metal expansion pipe. The tunnel surrounding rock displacement monitoring device is simple in structure, capable of effectively monitoring tunnel surrounding rock displacement change, good in effect, low in cost and suitable for popularization and application.

Description

Tunnel surrounding rock displacement monitoring measuring point device

Technical Field

The invention relates to a tunnel surrounding rock displacement monitoring measuring point device, and belongs to the technical field of monitoring.

Background

The reflector plate used for assisting the total station in measuring is independent at present, and in actual engineering measurement such as tunnel engineering, the reflector plate and the expansion bolt are adhered together through a specific means, and then the expansion bolt can be driven into concrete or places needing monitoring. A large number of engineering measurements show that the method is relatively troublesome and is not beneficial to actual operation. Particularly, in the tunnel engineering measurement, because the field environment is bad, the current measuring point device is easy to be damaged, and simultaneously because the dust is more in the tunnel, the current reflector plate is often used for a short time and just covered by the dust, and is difficult to clean, causes the condition that the device can not be used after a short time. Therefore, a tunnel surrounding rock displacement monitoring measuring point device which is easy to clean, long in service life and convenient to install is urgently needed at present.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the tunnel surrounding rock displacement monitoring and measuring point device which is easy to clean, long in service life and convenient to install.

In order to achieve the purpose, the invention provides the following technical scheme: a tunnel surrounding rock displacement monitoring and measuring point device comprises a screw and a thin iron ring connected to one end of the screw, wherein the thin iron ring is divided into an upper thin iron ring and a lower thin iron ring along the axial direction, a circular thin iron sheet is embedded between the upper thin iron ring and the lower thin iron ring, two surfaces of the thin iron sheet are respectively pasted with a reflector, a cross wire is arranged on the reflector, the other end of the screw is conical, a layer of metal expansion pipe is wrapped on the outer surface of the screw, a crack is formed in the end, far away from the thin iron ring, of the metal expansion pipe along the axial direction of the metal expansion pipe, a nut is sleeved on the screw close to the thin iron ring, and a base plate is arranged between the nut and the metal expansion pipe.

Preferably, the thin iron sheet and the reflector sheet are completely overlapped and fixed between the upper and lower thin iron rings by screws.

Preferably, the screws are four in total, are uniformly distributed and are connected to form a square.

Preferably, the number of the cracks is three, and the cracks are connected in sequence to form an equilateral triangle.

Preferably, the length of the crack is 2/5-3/5 of the length of the metal expansion pipe.

According to the technical scheme, the tunnel surrounding rock displacement monitoring device is simple in structure, capable of effectively monitoring the displacement change of the tunnel surrounding rock, good in effect, low in cost and suitable for popularization and application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a radial cross-sectional view of a thin iron ring according to the present invention;

fig. 3 is a side view of the metal expansion tube of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.

A tunnel surrounding rock displacement monitoring measuring point device as shown in figures 1, 2 and 3 comprises a screw rod 1 and a thin iron ring 2 connected to one end of the screw rod, wherein the thin iron ring 2 is divided into an upper thin iron ring 21 and a lower thin iron ring 22 along the axial direction, a circular thin iron sheet 3 is embedded between the upper thin iron ring 21 and the lower thin iron ring 22, two surfaces of the thin iron sheet 3 are respectively pasted with a reflector plate 4, the thin iron sheet 3 and the reflector plate 4 are completely superposed and are fixed between the upper thin iron ring 2 and the lower thin iron ring 3 through screws 9, the screws 9 are four in total and uniformly distributed and connected to form a square, a cross wire 5 is arranged on the reflector plate 4, when measuring distance by instruments such as a total station instrument and the like, a flashlight is irradiated on the reflector plate 4 to see a measuring point through a telescope of the total station instrument to align to the center of the cross wire 5, the other end of the screw rod 1 is conical, the outer surface of the screw rod 1 is coated with a layer of metal expansion pipe 6, one end of the metal expansion pipe 6, which is far away from the thin iron ring 2, is provided with a crack along the axial direction, the number of the cracks is three, the cross sections of the cracks are sequentially connected to form an equilateral triangle, the length of the crack is 1/2 of the length of the metal expansion pipe 6, the metal expansion pipe 6 is sleeved with a nut 7 on the screw rod 1, which is close to the thin iron ring 2, a backing plate 8 is arranged between the nut 7 and the metal expansion pipe 6, when the nut 7 is rotated by a wrench and the like, the metal expansion pipe 6 is squeezed and pushed by the backing plate 8, so that the metal expansion pipe 6 moves towards the other end, but due to the conical effect of one end of the screw rod 1, the metal expansion pipe 6 can slide along an inclined plane parallel to the nut 7, the metal expansion pipe 6 can slide forwards all the time until the metal expansion pipe is inserted into concrete or surrounding rock, and the metal expansion pipe 6 can even burst, thereby playing a role of fixation.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a tunnel country rock displacement monitoring measurement station device which characterized in that: the expansion screw comprises a screw rod (1) and a thin iron ring (2) connected to one end of the screw rod, wherein the Bao Tiehuan (2) is axially divided into an upper thin iron ring (21) and a lower thin iron ring (22), a round thin iron sheet (3) is embedded between the upper thin iron ring (21) and the lower thin iron ring (22), two sides of the thin iron sheet (3) are both adhered with reflection sheets (4), a cross wire (5) is arranged on each reflection sheet (4), the other end of the screw rod (1) is conical, a layer of metal expansion pipe (6) is wrapped on the outer surface of the screw rod (1), one end, far away from the thin iron ring (2), of the metal expansion pipe (6) is provided with a crack along the axial direction of the metal expansion pipe, the metal expansion pipe (6) is sleeved with a nut (7) close to the thin iron ring (2) on the screw rod (1), and a backing plate (8) is arranged between the nut (7) and the metal expansion pipe (6); the thin iron sheet (3) and the reflector sheet (4) are completely overlapped and fixed between the upper thin iron ring (21) and the lower thin iron ring (22) through screws (9).

2. The tunnel surrounding rock displacement monitoring measuring point device of claim 1, characterized in that: the screws (9) are four in total, are uniformly distributed and are connected to form a square.

3. The tunnel surrounding rock displacement monitoring measuring point device of claim 1, characterized in that: the number of the cracks is three in total, are connected in sequence to obtain an equilateral triangle section.

4. The tunnel surrounding rock displacement monitoring measuring point device of claim 1, characterized in that: the length of the crack is 2/5-3/5 of the length of the metal expansion pipe (6).