Shield tail gap measuring device of subway construction shield tunneling machine

Abstract

The utility model provides a subway construction shield tunneling machine shield tail gap measuring device which comprises a base plate, two parallel sliding grooves are arranged at one end of the base plate, a sliding rod is arranged in each sliding groove, and two sliding blocks are arranged on the surface of each sliding rod in a sliding mode. One end of each sliding block is provided with a spring used for pushing the sliding block to move towards the center position of the sliding rod, one side of each sliding block is movably connected with a connecting rod, and the other end of each connecting rod is connected with the ejector rod. A measuring rod is arranged at the other end, opposite to the moving groove, of the upper surface of the base plate, and an open hole for the measuring rod to penetrate through is formed in one end of the ejector rod. According to the utility model, the ejector rod is pushed by adopting the movement change between the sliding block and the connecting rod, so that the ejector rod is in contact with the duct piece, the measuring rod is arranged at one end of the ejector rod, after the ejector rod ascends, the distance value of the shield tail gap can be obtained by directly observing the measuring rod, and the measuring efficiency is higher.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling technology, and in particular relates to a device for measuring the tail gap of a shield tunneling machine in subway construction. Background Technology

[0002] Urban subway tunnels are generally constructed using tunnel boring machines (TBMs). The TBM's cutterhead excavates the ground to create surrounding rock space. The TBM's segment assembler then assembles precast reinforced concrete segments to form lining rings. Each lining ring typically consists of six segments. A certain gap exists between the assembled lining ring and the inner cavity of the TBM's tail shield; this is called the tail gap. The tail gap is crucial for ensuring the TBM maintains a good tunneling posture and can smoothly adapt to the tunnel's designed alignment during construction.

[0003] The device for measuring the tail gap of a subway tunnel boring machine, with announcement number CN 219869611 U, mainly relies on compression deformation, elastic deformation of the return spring, and sliding deformation of the articulated arm to drive the rotation of the articulated fixed arm. The vertical displacement of the top of the articulated arm is obtained by the change of the rotation angle of the articulated arm, thereby obtaining the accurate distance of the tail gap. However, this measuring device still has the following defects: the measurement result still needs to be calculated by considering the change of the rotation angle and the movement distance of the articulated arm, so that the specific value of the tail gap cannot be obtained directly. It is very inconvenient to use and has low measurement efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a shield tail gap measuring device for subway construction tunnel boring machines. It utilizes the movement and variation between a slider and a connecting rod to push a top rod into contact with the tunnel lining segments. By setting a measuring rod at one end of the top rod, the distance value of the shield tail gap can be directly determined by observing the measuring rod after the top rod rises, resulting in higher measurement efficiency.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A device for measuring the tail gap of a tunnel boring machine for subway construction includes a base plate. Two parallel sliding grooves are provided at one end of the base plate. A sliding rod is provided inside each sliding groove. Two sliders are slidably arranged on the surface of the sliding rod. A spring is provided at one end of each slider for pushing the slider towards the center position of the sliding rod. A connecting rod is movably connected to one side of the slider. The other end of the connecting rod is connected to a top rod.

[0007] A measuring rod is provided on the upper surface of the substrate at the other end relative to the moving groove, and an opening is provided at one end of the top rod for the measuring rod to pass through.

[0008] Furthermore, a plane for connecting to the connecting rod is provided on one side of the slider, and a convex shaft for movably connecting to the connecting rod is provided in the plane. Openings for the convex shaft and the push rod to pass through are provided at both ends of the connecting rod.

[0009] Furthermore, the two connecting rods in the same sliding groove are placed on different sides of the slider, and the inner wall of the sliding groove is in contact with the outer side of the two connecting rods respectively; this is equivalent to the distance between the outer sides of the two connecting rods being the same as the width of the sliding groove, so that the connecting rods can only move along the length direction of the sliding groove, and will not swing along the length direction of the substrate.

[0010] Furthermore, two grooves are opened at one end of the top rod to connect with one end of the connecting rod, and a sleeve is set in the groove and between the two connecting rods; the length of the sleeve plus the thickness of the two connecting rods is equal to the length of the groove, which can prevent the upper end of the connecting rod from swinging in the groove, and at the same time keep the two connecting rods parallel and prevent tilting, thus ensuring the smoothness of the connecting rod rotation.

[0011] Furthermore, an auxiliary block is provided above the top rod and on one side of the measuring rod. The auxiliary block can convert the arc-shaped vertex above the top rod into a plane, making it easier to cooperate with the measuring rod and observe the values ​​on the surface of the measuring rod.

[0012] Furthermore, both ends of the connecting rod are semi-circular structures, and the radius of the semi-circular structure is smaller than the radius of the top rod. Therefore, after the connecting rod is connected to the top rod, the connecting rod will not protrude from the surface of the top rod, so as not to affect the contact between the top rod and the outer surface of the tube segment, thus ensuring the accuracy of the measured values.

[0013] Furthermore, the lower surface of the substrate has an arc-shaped structure, which, when placed in the shield tail gap between the tube segment and the shield tail, can fit against the inner side of the shield tail, preventing it from shaking while ensuring the accuracy of numerical measurements.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model uses the movement and change between the slider and the connecting rod to push the top rod to contact the segment. By setting a measuring rod at one end of the top rod, the distance value of the shield tail gap can be directly obtained by observing the measuring rod after the top rod rises, which is more efficient.

[0016] 2. In this invention, an auxiliary block is provided at one end of the push rod. The upper surface of the auxiliary block is at the same level as the upper vertex of the push rod. The auxiliary block can increase the contact line between the upper vertex of the push rod and the measuring rod, making it easier to observe the values. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the top rod in the lowered state of this utility model;

[0018] Figure 2 This is a schematic diagram of the top rod in the rising state of this utility model;

[0019] Figure 3 This is a schematic diagram of the position and structure of the slider when the top rod is in the upward state of this utility model;

[0020] Figure 4 This is a schematic diagram of the position and structure of the slider when the push rod is in the downward state of this utility model;

[0021] Figure 5 This is a utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 6 This is a schematic diagram of the structural state of the present invention placed between the tunnel segment and the shield tail.

[0023] In the picture:

[0024] 1-Base plate, 2-Sliding groove, 3-Slide rod, 4-Slider, 41-Pan shaft, 5-Spring, 6-Connecting rod, 7-Top rod, 71-Auxiliary block, 8-Sleeve, 9-Measuring rod. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] As attached Figure 1-6 As shown.

[0027] A device for measuring the tail gap of a tunnel boring machine for subway construction includes a rectangular base plate 1. Two parallel sliding grooves 2 are provided at one end of the base plate 1. A sliding rod 3 is provided inside each sliding groove 2. Two sliders 4 are slidably installed on the outside of the sliding rods 3. A spring 5 is provided at one end of each slider 4 for pushing the slider 4 toward the center position of the sliding rod 3. A connecting rod 6 is movably connected to one side of the slider 4. The other end of the connecting rod 6 is connected to a top rod 7.

[0028] The starting value of the surface value of the measuring rod 9 is not 0, but is based on the thickness of the substrate 1.

[0029] The usage process is as follows: When placing the substrate 1 into the shield tail gap between the tube segment and the shield tail, it is necessary to manually press the top rod 7 at the end of the measuring rod 9 to make it contact the substrate 1, as shown in the attached figure. Figure 1 As shown, at this time, the sliders 4 in the sliding groove 2 are located at both ends of the sliding groove 2, and the spring is in a contracted state.

[0030] In the above state, insert one end of the substrate 1 with the sliding groove 2 into the shield tail gap between the tube segment and the shield tail, with the insertion length determined by the second sliding groove 2 also being within the shield tail gap; at this time, slowly release the top rod 7, and under the push of the spring 5, the two sliders 4 at both ends of the sliding groove 2 move toward the center position of the sliding groove 2, and under the action of the connecting rod 6, the top rod 7 is pushed up and slowly rises.

[0031] After the top rod 7 contacts the outer surface of the tunnel segment, it stops rising. At this time, by observing the measuring rod 9 through which one end of the top rod 7 passes, the distance of the shield tail gap between the tunnel segment and the shield tail can be determined.

[0032] When it is necessary to remove the substrate 1, simply press the push rod 7 located on the outside again to lower the push rod 7 a certain distance, and the substrate 1 can be pulled out.

[0033] Moving the base plate 1 after the push rod 7 has descended can prevent friction between the push rod 7 and the outer side of the tube sheet, thus improving the service life of the push rod 7.

[0034] In the above process, both ends of the connecting rod 6 are semi-circular structures, and the radius of the circle is smaller than that of the top rod 7. Therefore, after the connecting rod 6 is connected to the top rod 7, the connecting rod 6 will not protrude from the surface of the top rod 7, so that it will not affect the contact between the top rod 7 and the outer surface of the tube segment, thus ensuring the accuracy of the measured values.

[0035] In the above process, by pressing the top rod 7, multiple measurement positions can be changed for continuous measurement, which is highly efficient and the data accuracy is also higher. Furthermore, by continuously recording the shield tail gap distance, a gap distance distribution curve can be formed, which is convenient for technicians to analyze the shield tail gap and the attitude of the tunnel boring machine and the segments, resulting in better results.

[0036] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A device for measuring the gap between the tail shield and the tunnel wall of a tunneling shield, comprising a base plate (1), characterized in that: Two parallel sliding grooves (2) are provided at one end of the substrate (1). A sliding rod (3) is provided inside each sliding groove (2). Two sliders (4) are slidably arranged on the surface of the sliding rod (3). A spring (5) is provided at one end of each slider (4) to push the slider (4) toward the center position of the sliding rod (3). A connecting rod (6) is movably connected to one side of the slider (4). The other end of the connecting rod (6) is connected to the top rod (7). A measuring rod (9) is provided on the upper surface of the substrate (1) at the other end relative to the sliding groove (2), and an opening is provided at one end of the top rod (7) for the measuring rod (9) to pass through.

2. The shield tail gap measuring device for subway construction shield machine as described in claim 1, wherein one side of the slider (4) is provided with a plane for connecting with the connecting rod (6), and a convex shaft (41) is provided in the plane for movably connecting with the connecting rod (6).

3. In the subway construction shield tunneling machine tail gap measuring device as described in claim 1, the two connecting rods (6) in the same sliding groove (2) are respectively placed on different sides of the slider (4), and the inner wall of the sliding groove (2) is in contact with the outer side of the two connecting rods (6).

4. As described in claim 3, a shield tail gap measuring device for subway construction shield machine, wherein one end of the top rod (7) is provided with two grooves connected to one end of the connecting rod (6), and a sleeve (8) is provided in either groove and between the two connecting rods (6).

5. In the subway construction shield tunneling machine tail gap measuring device as described in claim 4, the length of the sleeve (8) plus the thickness of the connecting rods (6) on both sides is equal to the length of the groove.

6. In the subway construction shield tunneling machine tail gap measuring device as described in claim 1, an auxiliary block (71) is provided above the top rod (7) and on one side of the measuring rod (9).

7. The shield tail gap measuring device for subway construction shield machine as described in claim 4, wherein both ends of the connecting rod (6) are semi-circular structures, and the radius of the semi-circular structure is smaller than the radius of the top rod (7).

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