阅读说明：本技术 一种用于隧道二衬厚度监测的压力感应装置及监测方法 (Pressure sensing device and monitoring method for monitoring thickness of tunnel secondary lining ) 是由 石少帅 范宏运 刘洪亮 胡杰 杨梓梁 秦承帅 金岩 张琦 崔兰玉 杨光宇 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种用于隧道二衬厚度监测的压力感应装置及方法,包括一个气压缸、活塞杆、压力传感器、悬浮标和监测仪,所述的气压缸头部为锥形,所述活塞杆设置在气压缸尾部,所述的活塞杆的一端位于气压缸内,另外一端延伸到气压缸外与所述的悬浮标相连；所述的压力传感器与一个连接板相连,所述的连接板、活塞杆的端部以及气压缸三者之间形成密闭空间,所述的压力传感器位于该空间内,压力传感器与位于气压缸外的检测仪相连。(The invention discloses a pressure sensing device and a pressure sensing method for monitoring the thickness of a tunnel secondary lining, wherein the pressure sensing device comprises a pneumatic cylinder, a piston rod, a pressure sensor, a suspension mark and a monitor, the head part of the pneumatic cylinder is conical, the piston rod is arranged at the tail part of the pneumatic cylinder, one end of the piston rod is positioned in the pneumatic cylinder, and the other end of the piston rod extends out of the pneumatic cylinder and is connected with the suspension mark; the pressure sensor is connected with a connecting plate, a closed space is formed among the connecting plate, the end part of the piston rod and the pneumatic cylinder, the pressure sensor is positioned in the space, and the pressure sensor is connected with a detector positioned outside the pneumatic cylinder.)

1. A pressure sensing device for monitoring the thickness of a tunnel secondary lining is characterized by comprising a pneumatic cylinder, a piston rod, a pressure sensor, a suspension mark and a monitor, wherein the head of the pneumatic cylinder is conical, the piston rod is arranged at the tail of the pneumatic cylinder, one end of the piston rod is positioned in the pneumatic cylinder, and the other end of the piston rod extends out of the pneumatic cylinder and is connected with the suspension mark; the pressure sensor is connected with a connecting plate, a closed space is formed among the connecting plate, the end part of the piston rod and the pneumatic cylinder, the pressure sensor is positioned in the space, and the pressure sensor is connected with a detector positioned outside the pneumatic cylinder.

2. The pressure sensing device for monitoring the thickness of a tunnel secondary lining according to claim 1, wherein said pressure sensor is connected to said monitor through a wire.

3. Pressure sensing device for tunnel secondary lining thickness monitoring as claimed in claim 1, characterized in that the area of said connection plate is slightly smaller than the area of the pneumatic cylinder in which the connection plate is fixed.

4. Pressure sensing device for tunnel secondary lining thickness monitoring according to claim 1, characterized in that said tie plates are welded in pneumatic cylinders.

5. Pressure sensing device for tunnel secondary lining thickness monitoring according to claim 1, characterised in that said pneumatic cylinder head is a solid conical structure.

6. A method for monitoring the thickness of a tunnel secondary lining using the sensing device of any one of claims 1-5, wherein:

A. according to the design thickness of the secondary lining, determining the position elevations of the upper surface points of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder and the left arch waist on the monitored section, and marking the position of the monitored point on the primary lining of the tunnel;

B. according to the obtained monitoring point position, drilling a hole with a certain depth on the primary lining surface, inserting a pressure sensing device into the hole, sealing the hole by using an anchoring agent, and fixing the pressure sensing device;

C. leading the transmission line of the pressure induction device out of the secondary lining area of the tunnel along the tunnel excavation direction so as to be convenient for monitoring;

D. the tunnel secondary lining is in the work progress, along with the concrete is poured, the pressure value of pressure-sensitive device is measured at an interval of time, when treating that the pressure value changes, can confirm that tunnel secondary lining thickness reaches the design requirement, later keeps monitoring frequency, treats that the concrete solidifies completely the back, stops the monitoring, begins next board secondary lining construction.

Technical Field

The invention relates to the field of monitoring of tunnel secondary lining thickness, in particular to a pressure sensing device and a monitoring method for monitoring the tunnel secondary lining thickness.

Background

In the big development period of the infrastructure in China, finished projects need to be detected and accepted no matter in the construction process of the civil engineering or the bridge, tunnel, road and the like, so as to ensure the quality safety of the projects. With the vigorous development of high-speed railways in China, tunnels are gradually the key points for construction. In the process of tunnel construction, in order to ensure the long-term safety of the tunnel, the good and bad of the construction quality of the secondary lining becomes a decisive factor.

The inventor finds that in the tunnel construction process, the secondary lining of the tunnel often causes the problems of insufficient thickness and the like of the secondary lining of the tunnel due to deviation of the two-lining trolley from the center line of the tunnel or other construction factors, and greatly threatens the safety of the tunnel.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a novel device and a method for monitoring the thickness of the secondary lining of the tunnel, which are simple to operate, can be used for accurately monitoring the thickness of the secondary lining of the tunnel and are beneficial to ensuring the long-term safety and the quality reliability of the tunnel.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a pressure sensing device for monitoring the thickness of a tunnel secondary lining, which comprises a pneumatic cylinder, a piston rod, a pressure sensor, a suspension mark and a monitor, wherein the head part of the pneumatic cylinder is conical, the piston rod is arranged at the tail part of the pneumatic cylinder, one end of the piston rod is positioned in the pneumatic cylinder, and the other end of the piston rod extends out of the pneumatic cylinder and is connected with the suspension mark; the pressure sensor is connected with a connecting plate, a closed space is formed among the connecting plate, the end part of the piston rod and the pneumatic cylinder, the pressure sensor is positioned in the space, and the pressure sensor is connected with a detector positioned outside the pneumatic cylinder.

As a further technical scheme, the pressure sensor is connected with the monitor through a lead.

As a further technical scheme, the area of the connecting plate is slightly smaller than that of the pneumatic cylinder, and the connecting plate is fixed in the pneumatic cylinder.

As a further technical scheme, the head of the pneumatic cylinder is of a solid conical structure.

The invention also provides a method for monitoring the thickness of the tunnel secondary lining by using the induction device,

A. according to the design thickness of the secondary lining, determining the position elevations of the upper surface points of the secondary lining at the arch crown, the left arch shoulder, the right arch shoulder and the left arch waist on the monitored section, and marking the position of the monitored point on the primary lining of the tunnel;

B. according to the obtained monitoring point position, drilling a hole with a certain depth on the primary lining surface, inserting a pressure sensing device into the hole, sealing the hole by using an anchoring agent, and fixing the pressure sensing device;

C. leading the transmission line of the pressure induction device out of the secondary lining area of the tunnel along the tunnel excavation direction so as to be convenient for monitoring;

D. the tunnel secondary lining is in the work progress, along with the concrete is poured, the pressure value of pressure-sensitive device is measured at an interval of time, when treating that the pressure value changes, can confirm that tunnel secondary lining thickness reaches the design requirement, later keeps monitoring frequency, treats that the concrete solidifies completely the back, stops the monitoring, begins next board secondary lining construction.

According to a tunnel design drawing, the design positions of the upper surfaces of the secondary linings of the tunnel at the vault, the left arch shoulder, the right arch shoulder and the left arch waist of a certain section are determined by using a total station, and a pressure sensing device is arranged at the positions, so that the lower surface of a suspension mark reaches the design height of the upper surfaces of the secondary linings of the tunnel at the positions. In the process of constructing the tunnel secondary lining, along with the pouring of concrete, the pressure value of the pressure sensing device is monitored by fixed monitoring frequency, when the height of the concrete reaches the design height, the pressure sensing device is in contact with the suspension buoy, the suspension buoy is pushed to push the piston rod to move towards the inside of the pressure cylinder, the internal pressure of the pressure sensing device is increased, and the pressure value of the pressure sensing device changes suddenly, namely, the thickness of the poured concrete reaches the design requirement, and the monitoring can be stopped after the concrete is solidified. According to the pressure value change of the pressure sensing device, whether the secondary lining of the tunnel meets the design thickness requirement or not can be determined, and the safety and the quality reliability of the secondary lining are ensured.

The invention solves the problems of insufficient thickness and position deviation of the secondary lining of the tunnel, and has the following advantages:

1. the pressure sensing device for monitoring the thickness of the secondary lining of the tunnel and the using method thereof solve the problems of high difficulty and low precision of detection of the thickness of the secondary lining of the tunnel and improve the monitoring efficiency of the thickness of the secondary lining of the tunnel. The thickness of the secondary lining of the tunnel is monitored based on the pressure sensing device and the using method, compared with the former research, the thickness of the secondary lining is closer to the engineering practice, the thickness of the obtained secondary lining meets the design requirement, and the engineering quality of tunnel construction is improved.

2. Based on the pressure sensing device, the cost is low, and the monitoring effect is better;

3. the complex operation of manually detecting the secondary lining thickness of the tunnel by adopting a radar is avoided, the tunnel construction efficiency is improved, and the tunnel construction progress is accelerated;

4. the tunnel quality and the safety permanence can be guaranteed extremely well, and the service life of the tunnel is prolonged to a certain extent.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic diagram of the present invention.

In the figure: 1 conical head, 2 pressure sensors, 3 pneumatic cylinders, 4 monitors, 5 suspension buoys, 6 connecting plates and 7 piston rods.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

as introduced by the background art, the inventor finds that in the tunnel construction process, the secondary lining of the tunnel often causes the problems of insufficient thickness and the like of the secondary lining of the tunnel due to deviation of a two-lining trolley from the center line of the tunnel or other construction factors, and greatly threatens the safety of the tunnel. In order to solve the technical problem, the application provides a pressure sensing device and a monitoring method for monitoring the thickness of a secondary lining of a tunnel, solves the problems of high difficulty and low precision in detecting the thickness of the secondary lining of the tunnel, and improves the monitoring efficiency of the thickness of the secondary lining of the tunnel. The thickness of the secondary lining of the tunnel is monitored based on the pressure sensing device and the using method, compared with the former research, the thickness of the secondary lining is closer to the engineering practice, the thickness of the obtained secondary lining meets the design requirement, and the engineering quality of tunnel construction is improved.

In an exemplary embodiment of the present application, as shown in fig. 1, the pressure sensing device for monitoring the thickness of the tunnel secondary lining includes a pneumatic cylinder 3, a piston rod 7, a pressure sensor 2, a suspension 5 and a monitor 4, wherein the head of the pneumatic cylinder 3 is tapered, preferably, the head of the pneumatic cylinder is a solid tapered structure.

The piston rod 7 is arranged at the tail part of the pneumatic cylinder, one end of the piston rod 7 is positioned in the pneumatic cylinder 3, and the area of the end of the piston rod 7 is equal to the inner diameter area of the pneumatic cylinder; the other end extends out of the pneumatic cylinder 3 and is connected with the suspension buoy 5; pressure sensor 2 link to each other with a connecting plate 4, the tip of piston rod and pneumatic cylinder three between form airtight space, pressure sensor be located this space, pressure sensor 2 pass through the wire and be located outside the pneumatic cylinder monitor 4 link to each other.

Specifically, the connection mode of pneumatic cylinder 3 and piston rod 7 is the same with the connection mode of current piston and pneumatic cylinder, and this application utilizes the principle of pneumatic cylinder to carry out thickness monitoring.

In this embodiment, the shape of the connecting plate is the same as the cross-sectional shape of the pneumatic cylinder, for example, if the pneumatic cylinder is cylindrical, the connecting plate is circular, the outer ring radius of the connecting plate is slightly smaller than the inner diameter of the pneumatic cylinder, and the connecting plate is fixed in the pneumatic cylinder. Or the shape of the pneumatic cylinder may be rectangular, square, etc.

Further, the material of the pneumatic cylinder is preferably a steel material.

The invention discloses a pressure sensing device for monitoring the thickness of a secondary lining of a tunnel, which is used for monitoring whether the secondary lining of the tunnel reaches the designed thickness or not by arranging a plurality of pressure sensing devices on the primary lining of the tunnel according to the requirement according to the data such as the thickness of the secondary lining of the tunnel in a tunnel design drawing. The invention relates to instruments mainly comprising a pressure sensor, a fixed inverted cone and a suspension buoy, wherein a site measurer determines the design height of the upper surface of a secondary lining of a certain section by using a total station after primary lining of a tunnel is finished, pressure sensing devices are arranged at a vault, left and right arch shoulders and left and right arch waists, and cement paste is contacted with the suspension buoy when the thickness of the cement paste reaches the design thickness in the secondary lining construction process, so that the pressure value of the pressure sensing device is changed, and the fact that the thickness of the secondary lining reaches the design requirement is explained. The invention researches a pressure sensing device solution for monitoring the thickness of a tunnel secondary lining and a using method thereof, solves the problem of insufficient thickness of the tunnel secondary lining, and improves the construction quality of the tunnel secondary lining. The thickness of the secondary lining of the tunnel is monitored based on the pressure sensing device and the using method, compared with the former research, the thickness of the secondary lining is closer to the engineering practice, the thickness of the obtained secondary lining meets the design requirement, and the engineering quality of tunnel construction is improved.