Shield tail deformation monitoring method

Abstract

The present invention relates to a shield tail deformation monitoring method, which is used for a shield tail deformation monitoring device installed in the gap between the inner wall of the shield tail and the pipe segment. The monitoring device includes: a spring arranged at intervals and one end fixed to the inner wall of the shield tail; and a tension sensor fixed to the other end of the spring and installed on the inner wall of the shield tail. The tension sensor and the end of the spring fixed to the inner wall of the shield tail have a set distance, so that the spring is extended, so that the tension sensor obtains an initial tension value accordingly. When the shield tail is deformed, the spring is extended or shortened accordingly, and the change in the tension of the spring is measured by the tension sensor to calculate the deformation of the shield tail. The present invention effectively solves the problem of difficult deformation monitoring at the shield tail of a shield machine, can reflect the deformation of the shield tail of the shield machine in real time and continuously, and can repair the shield tail in time, thereby improving construction efficiency and ensuring construction quality.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and in particular to a shield tail deformation monitoring method. Background Art

[0002] At present, with the development of society, more and more construction projects need to be carried out underground, so the utilization rate of shield machines has greatly increased. However, in the actual construction process of shield machines, due to the influence of factors such as soil and shield advancement speed, the shield tail is prone to deformation. If the deformation is too large, it may lead to problems such as the inability to assemble the segments, and may even make it impossible to continue normal construction, seriously affecting the construction quality and progress. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a shield tail deformation monitoring method, which solves the problem of difficulty in monitoring the deformation of the shield tail of the shield machine, can reflect the deformation of the shield tail of the shield machine in real time and continuously, and repair the shield tail in time, thereby improving construction efficiency and ensuring construction quality.

[0004] The technical solution to achieve the above purpose is:

[0005] The present invention provides a shield tail deformation monitoring method, which is used for a shield tail deformation monitoring device. The monitoring device is installed in the gap between the inner wall of the shield tail and the pipe segment. The monitoring device includes:

[0006] Springs arranged at intervals and fixed at one end to the inner wall of the shield tail; and

[0007] A tension sensor is fixed to the other end of the spring and mounted on the inner wall of the shield tail, and a set distance is set between the tension sensor and the end of the spring fixed to the inner wall of the shield tail, so that the spring stretches, so that the tension sensor obtains the initial tension value of the spring;

[0008] When the shield tail is deformed, the spring will be extended or shortened accordingly, and the change in the spring tension is measured by the tension sensor to calculate the deformation of the shield tail.

[0009] The shield also includes a fixing piece fixed at intervals on the inner wall of the shield tail and arranged corresponding to the tension sensor, and a spring is fixed between the tension sensor and the corresponding fixing piece so that the spring is arranged in a direction perpendicular to or parallel to the axial direction of the shield tail;

[0010] Four tension sensors are symmetrically arranged around each fixing part, and the springs connected between the tension sensors and the fixing parts are arranged in directions parallel and perpendicular to the axial direction of the shield tail and staggered in a cross shape; accordingly,

[0011] When the shield tail is deformed by axial force, the spring in the direction parallel to the axial direction of the shield tail extends or contracts accordingly, and the tension sensor is used to monitor the change in tension to determine the position and amount of deformation;

[0012] When the shield tail is deformed by radial force, the spring in the direction perpendicular to the axial direction of the shield tail extends or contracts accordingly, and the tension sensor is used to monitor the change in tension to determine the position and amount of deformation.

[0013] The present invention provides a shield tail deformation monitoring method, which is used for a shield tail deformation monitoring device. The monitoring device is arranged in a gap between the inner wall of the shield tail and a pipe segment. When the shield tail is deformed by force, a spring is correspondingly extended or shortened. A tension sensor is used to measure the change in spring tension, and the deformation of the shield tail can be calculated based on the change, thereby preventing the shield tail from being deformed too much and affecting normal construction. The method solves the problem of difficulty in monitoring the deformation at the shield tail of a shield machine, can reflect the deformation of the shield tail of the shield machine in real time and continuously, and can repair the shield tail in time, thereby improving construction efficiency and ensuring construction quality.

[0014] A further improvement of the shield tail deformation monitoring device of the present invention is that the tension sensor is electrically connected to the controller of the shield machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cross-sectional view of the monitoring device in the shield tail deformation monitoring method of the present invention in use.

[0016] Figure 2 It is a side sectional view of the monitoring device in the shield tail deformation monitoring method of the present invention in use. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] See Figure 1 The present invention provides a shield tail deformation monitoring method, which is used for a shield tail deformation monitoring device. By setting the monitoring device in the gap between the inner wall of the shield tail and the pipe segment, when the shield tail is deformed by force, the spring extends or shortens accordingly, and the change in spring tension is measured by a tension sensor. The deformation of the shield tail can be calculated based on the change, thereby preventing the shield tail from deforming too much and affecting normal construction. The problem of difficulty in monitoring the deformation of the shield tail of the shield machine is solved, and the deformation of the shield tail of the shield machine can be reflected in real time and continuously. The shield tail can be repaired in time, thereby improving construction efficiency and ensuring construction quality. The shield tail deformation monitoring device of the present invention is described below with reference to the accompanying drawings.

[0019] See Figure 1 , Figure 1 This is a front cross-sectional view of the monitoring device in the shield tail deformation monitoring method of the present invention. Figure 1 , the shield tail deformation monitoring method and the shield tail deformation monitoring device of the present invention are described.

[0020] like Figure 1 As shown, the shield tail deformation monitoring device of the present invention is installed in the gap between the inner wall of the shield tail 21 and the pipe segment, and the monitoring device includes:

[0021] Springs 13 arranged at intervals and fixed at one end to the inner wall of the shield tail 21; and

[0022] A tension sensor 11 is fixed to the other end of the spring 13 and mounted on the inner wall of the shield tail 21. A set distance is provided between the tension sensor 11 and the end of the spring 13 fixed to the inner wall of the shield tail 21, so that the spring 13 stretches, thereby the tension sensor 11 obtains the initial tension value of the spring;

[0023] When the shield tail 21 is deformed, the spring 13 is extended or shortened accordingly, and the change in the tension of the spring 13 is measured by the tension sensor 11 to calculate the deformation of the shield tail 21 .

[0024] As a preferred embodiment of the present invention, it also includes a fixing piece 12 fixed at intervals on the inner wall of the shield tail 21 and arranged corresponding to the tension sensor 11, and the spring 13 is fixedly connected between the tension sensor 11 and the corresponding fixing piece 12, so that the spring 13 is arranged in a direction perpendicular to or parallel to the axial direction of the shield tail 21.

[0025] Furthermore, a plurality of tension sensors 11 are symmetrically arranged around the fixing member 12 , so that the initial tension values ​​measured by the plurality of tension sensors 11 are the same.

[0026] Further, combined Figure 2 As shown, four tension sensors 11 are symmetrically arranged around each fixing member 12, and the springs 13 connected between the tension sensors 11 and the fixing members 12 are arranged in directions parallel and perpendicular to the axial direction of the shield tail 21 and staggered in a cross shape to monitor the axial and radial deformation of the shield tail 21.

[0027] Preferably, the tension sensor 11 is electrically connected to the controller of the shield machine.

[0028] Preferably, a threshold value of the change amount of the spring 13 can be set accordingly, and an alarm is issued when the change amount of the spring 13 exceeds the set threshold value.

[0029] The specific implementation method of the present invention is as follows:

[0030] A fixing member 12 is fixedly installed at the center line of the inner wall of the shield tail 21, and four tension sensors 11 are symmetrically arranged around the fixing member 12, as shown in FIG. Figure 1 As shown, tension sensors 11 are provided on both the left and right sides and the front and rear sides of the fixing member 12, so that the fixing member 12 and the tension sensor 11 are arranged in a cross shape;

[0031] A spring is connected between the tension sensor 11 and the fixing member 12. When the tension sensor 11 is installed, the distance between the tension sensor 11 and the fixing member 12 cannot be too far to prevent the spring 13 from touching the pipe segment.

[0032] When the shield tail 21 is deformed by force, the spring 13 extends or shortens accordingly. At this time, the tension sensor 11 monitors the change in tension and measures the change in tension. The deformation of the shield tail 21 can be calculated based on the change in tension. The shield tail 21 can be repaired based on the deformation, thereby preventing the shield tail 21 from being deformed too much and affecting construction.

[0033] When the shield tail 21 is deformed by radial force, the springs 13 in the direction perpendicular to the axial direction of the shield tail 21 extend or contract accordingly. For example, when the shield tail 21 is squeezed and deformed by soil pressure from above and below, the springs 13 at the top and bottom of the shield tail 21 are stretched, while the springs 13 at the sides of the shield tail 21 contract accordingly. The tension sensor 11 monitors the change in tension to determine the location and amount of deformation.

[0034] When the shield tail 21 is deformed by axial force, the spring 13 in the direction parallel to the axial direction of the shield tail 21 extends or contracts accordingly. For example, if the force-bearing part of the shield tail 21 arches, the spring 13 in the corresponding arched part stretches and lengthens. The tension sensor 11 monitors the change in tension to determine the position and amount of deformation.

[0035] This method can accurately measure the deformation of the shield tail 21. By using a contact sensor, the deformation of the shield tail 21 can be monitored more accurately.

[0036] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A shield tail deformation monitoring method, which is used in a shield tail deformation monitoring device, characterized in that: The monitoring device is installed in the gap between the inner wall of the shield tail and the tube segment, and the monitoring device includes: Springs arranged at intervals and having one end fixed to the inner wall of the shield tail; and a tension sensor fixed to the other end of the spring and mounted on the inner wall of the shield tail, wherein a set distance is provided between the tension sensor and the end of the spring fixed to the inner wall of the shield tail, so that the spring is stretched, and the tension sensor obtains an initial tension value of the spring; When the shield tail is deformed, the spring is correspondingly extended or shortened, and the change in the tension of the spring is measured by the tension sensor to calculate the deformation of the shield tail; It also includes a fixing piece fixed at intervals on the inner wall of the shield tail and arranged corresponding to the tension sensor, and the spring is fixed between the tension sensor and the corresponding fixing piece so that the spring is arranged in a direction perpendicular to or parallel to the axial direction of the shield tail; Four tension sensors are symmetrically arranged around each of the fixing members, and the springs connected between the tension sensors and the fixing members are arranged in directions parallel and perpendicular to the axial direction of the shield tail and staggered in a cross shape; accordingly, When the shield tail is deformed by axial force, the spring in the direction parallel to the axial direction of the shield tail extends or contracts accordingly, and the tension sensor is used to monitor the change in tension to determine the position and amount of deformation; When the shield tail is deformed by radial force, the spring in the direction perpendicular to the axial direction of the shield tail extends or contracts accordingly, and the tension sensor is used to monitor the change in tension to determine the position and amount of deformation.

2. The shield tail deformation monitoring method according to claim 1, characterized in that: The tension sensor in the monitoring device is electrically connected to the controller of the shield machine.

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