Metro tunnel portal diameter supporting and measuring device

Abstract

The utility model relates to a subway tunnel portal diameter supporting and measuring device in the technical field of tunnel construction. Comprising a supporting measuring device, the supporting measuring device comprises a transverse measuring device used for transversely measuring a tunnel portal, and a longitudinal measuring device used for vertically measuring the tunnel portal is installed in the middle of the transverse measuring device. When the supporting plate abuts against the side wall of the tunnel portal, the position of the measuring assembly is locked by inserting the locking rod into the first positioning hole, the mechanical strength of the locking rod is improved through the arrangement of the second fixing block, the locking rod is not prone to deformation, the position of the measuring assembly is stable, and the measuring assembly is not prone to deformation. The supporting plate can stably support the side edge of the tunnel portal, the position of the bottom plate is fixed by inserting the supporting plate into the second positioning hole and the third positioning hole, and the second supporting plate can stably support the top of the tunnel portal.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a support and measuring device for the diameter of a subway tunnel entrance. Background Technology

[0002] During subway tunnel construction, in order to avoid landslides and collapses, support devices are often needed to support the tunnel entrance. At the same time, the diameter of the tunnel entrance also needs to be measured.

[0003] For example, Chinese patent application CN202321369436.9 discloses a subway tunnel opening diameter support measuring device. Its specific content includes: controlling the extension and retraction of a first hydraulic rod, which can move side support plates left and right, providing support for subway tunnel walls of varying widths. After the left and right side support plates abut against the wall, the extension and retraction of a second hydraulic rod can be controlled. The top support plate above the second hydraulic rod can abut against the top of the track opening, supporting the top structure and protecting the bottom plate below to prevent collapse during measurement. A sliding block can slide up and down on the surface of a metal rod. One end of the support rod is connected to the sliding block, and the other end is connected to the bottom of the top support plate, providing support for the top support plate. During the left and right movement of the side support plates, the sliding block simultaneously moves up and down on the surface of the metal rod, increasing the overall structural stability. A second laser rangefinder is located below the top support plate, enhancing safety during measurement. The second laser rangefinder is used to measure the vertical height of the subway track; the lower end is the transmitter, and the bottom of the top support plate is the receiver, allowing for accurate height measurement. The first laser rangefinder is used to measure the lateral width of the subway track. Measurements are safer when supported by side support plates. The first laser rangefinder is installed on the inner side of both side support plates, allowing for accurate measurement of the subway track width. However, it still has the following technical problems:

[0004] The above structure uses hydraulic rods for support, but in actual operation, the hydraulic rods are difficult to maintain a continuous support state. After the hydraulic rods are open for a long time, the seals are prone to deformation and failure, and the hydraulic oil will leak, resulting in a reduction in the support effect. It can be seen that the above structure is difficult to continuously support the entrance of the subway tunnel. Utility Model Content

[0005] To address the problem mentioned in the background section that existing technologies are unable to provide sustained support for subway tunnel entrances, this utility model provides the following technical solution:

[0006] A support measuring device for the diameter of a subway tunnel entrance, comprising a support measuring device;

[0007] The supporting measuring device includes a lateral measuring device for measuring the tunnel entrance laterally, and a longitudinal measuring device for measuring the tunnel entrance vertically is installed in the middle of the lateral measuring device.

[0008] The lateral measuring device includes a movable stage, with multiple positioning holes on the left and right sides of the movable stage. Measuring components are installed on the left and right sides of the middle part of the movable stage. A moving block is installed at one end of each measuring component, and two locking rods are installed at one end of each moving block to position the measuring components in conjunction with the positioning holes.

[0009] The longitudinal measuring device includes a second support plate, and the longitudinal measuring device includes a U-shaped frame for limiting the second support plate, and the U-shaped frame includes a rod for positioning the second support plate.

[0010] Furthermore, a support platform for limiting the U-shaped frame is installed at the middle of the rear end of the mobile stage, a fixing block is installed in the middle of the mobile stage, and magnetic blocks for limiting the measuring components are installed at the left and right ends of the fixing block.

[0011] Furthermore, the measuring component includes a measuring rod, which is a square rod with scale markings on its body and a support plate installed at one end.

[0012] Furthermore, a magnetic block two for magnetic attraction with the magnetic block one is installed at one end of the movable block near the fixed block one. A movable wheel is installed at the lower end of the movable block, and a top cover is installed at the upper end of the movable block. A limit tube is installed on one side of the top cover. A groove is machined on the inner wall of the upper end of the limit tube, and the upper wall of the groove is machined to be a rough surface.

[0013] Furthermore, a fixing block two for increasing the mechanical strength of the locking rods is installed at the lower end of the two locking rods, and a fixing block three is installed at the upper end of the two locking rods. A spring for controlling the locking rod reset is sleeved on the upper end of the two locking rods, and the spring is located at the lower end of the fixing block three. A pull rod is movably installed on the upper end of the fixing block three. A locking block for engaging with the locking groove is installed on the outer wall of the middle part of the pull rod, and the upper surface of the locking block is roughened.

[0014] Furthermore, a base plate is installed at the bottom of the second support plate, and sliders are installed at both ends of the base plate, with a positioning hole 2 machined in the middle of the sliders.

[0015] Furthermore, an electric push rod for controlling the vertical movement of the base plate is installed in the middle of the U-shaped frame, a scale plate for indicating the movement distance of the base plate is installed on the left front end of the U-shaped frame, and multiple positioning holes for positioning the slider in conjunction with the insertion rod are provided at both the left and right ends of the U-shaped frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] When the support plate of this utility model abuts against the side wall of the tunnel entrance, the position of the measuring component is locked by inserting a locking rod into the first positioning hole. The mechanical strength of the locking rod is increased by the setting of the second fixing block, making the locking rod less prone to deformation, thus making the position of the measuring component more stable. The support plate can provide stable support for the side of the tunnel entrance. This utility model fixes the position of the base plate by inserting two positioning holes, the second positioning hole and the third positioning hole, so that the second support plate can provide stable support for the top of the tunnel entrance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the supporting measuring device of this utility model;

[0020] Figure 3 This is a schematic diagram of the transverse measuring device of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the measuring component of this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged view of point A;

[0023] Figure 6 This is a schematic diagram of the longitudinal measuring device of this utility model.

[0024] The following is a list of component names represented by the various reference numerals in the attached figures:

[0025] 10-Guide rail;

[0026] 01-Support measuring device;

[0027] 100-Horizontal measuring device, 110-Moving stage, 111-Supporting platform, 113-Positioning hole one, 114-Fixing block one, 115-Magnetic block one, 120-Measuring component, 121-Measuring rod, 122-Scale mark, 123-Supporting plate one, 124-Locking rod, 125-Fixing block two, 126-Fixing block three, 127-Spring, 128-Pull rod, 129-Card block, 20-Moving block, 21-Magnetic block two, 22-Moving wheel, 23-Top cover, 24-Limiting tube, 25-Card slot;

[0028] 200-Longitudinal measuring device, 210-Support plate II, 211-Base plate, 212-Slider, 213-Positioning hole II, 220-U-shaped frame, 221-Electric push rod, 222-Scale plate, 223-Positioning hole III, 224-Insertion rod. Detailed Implementation

[0029] The preferred embodiments of this utility model are described in detail below, and a clear and complete explanation is given in conjunction with the accompanying drawings.

[0030] Please see Figures 1-6 This utility model provides a support measuring device for the diameter of a subway tunnel entrance, including a support measuring device 01 and a guide rail 10 installed inside the tunnel to guide the support measuring device 01. The support measuring device 01 includes a lateral measuring device 100 for lateral measurement of the tunnel entrance. The lateral measuring device 100 includes a moving platform 110, and the bottom of the moving platform 110 is equipped with rollers for rolling on the guide rail 10 so that the support measuring device 01 can move on the guide rail 10.

[0031] Multiple positioning holes 113 are provided on the left and right sides of the moving platform 110. Measuring components 120 are movably mounted on the left and right sides of the center of the moving platform 110. The positioning holes 113 facilitate the positioning of the measuring components 120. The measuring component 120 includes a measuring rod 121, which is a square rod. Blocks for limiting the measuring rod 121 are installed on both the left and right sides of the transverse measuring device 100, and square grooves are provided in the center of the blocks, allowing the measuring rod 121 to slide only left and right. A scale 122 is provided on the measuring rod 121, allowing for a direct visual observation of the moving distance of the measuring component 120, thereby calculating the diameter of the subway tunnel entrance.

[0032] A support plate 123 is fixedly installed at one end of the measuring rod 121. A movable block 20 is fixedly installed at one end of the measuring component 120 near the middle of the transverse measuring device 100. Two locking rods 124 are installed at one end of the movable block 20 to position the measuring component 120 in conjunction with the positioning hole 113. When the support plate 123 abuts against the tunnel sidewall, the locking rods 124 move downward and insert into the positioning hole 113, thereby locking the position of the movable block 20 and the measuring rod 121, so that the support plate 123 supports the tunnel sidewall. Since the overall width of the supporting measuring device 01 is fixed, the transverse diameter of the tunnel entrance can be determined by adding the extended length of the two measuring rods 121 to the original length of the supporting measuring device 01.

[0033] A longitudinal measuring device 200 for vertical measurement of the tunnel entrance is installed in the middle of the transverse measuring device 100. The longitudinal measuring device 200 includes a second support plate 210 and a U-shaped frame 220 for limiting the position of the second support plate 210. The U-shaped frame 220 includes a rod 224 for positioning the second support plate 210, so that when the second support plate 210 abuts against the tunnel roof, the rod 224 positions the second support plate 210.

[0034] A support platform 111 for limiting the U-shaped frame 220 is installed at the middle of the rear end of the moving stage 110, and the U-shaped frame 220 is fixedly installed on the support platform 111 by bolts. A fixing block 114 is fixedly installed in the middle of the moving stage 110, and magnetic blocks 115 for limiting the measuring component 120 are installed at both ends of the fixing block 114.

[0035] The movable block 20 is equipped with a magnetic block 21 at one end near the fixed block 114, which is used to magnetically attract the magnetic block 115. When the measurement component 120 is reset after the support measurement is completed, the movable block 20 approaches the fixed block 114. Under the mutual magnetic attraction between the magnetic block 115 and the magnetic block 21, the measurement component 120 is not easy to sway left and right when the movable stage 110 moves, which improves the stability of the measurement component 120 when the movable stage 110 moves.

[0036] The lower end of the movable block 20 is equipped with a movable wheel 22, which rolls on the movable table 110 to facilitate the movement of the measuring rod 121. The upper end of the movable block 20 is fixedly mounted with a top cover 23 by bolts. A limit tube 24 is fixedly mounted on one side of the top cover 23. The upper inner wall of the limit tube 24 is machined with a groove 25, and the upper groove wall of the groove 25 is machined with a rough surface. A vertical groove is machined in the middle of the limit tube 24, and the groove 25 is located at the upper end of the vertical groove.

[0037] The lower ends of the two locking rods 124 are fixedly equipped with fixing blocks 125 to increase the mechanical strength of the locking rods 124. The fixing blocks 125 prevent deformation of the locking rods 124 when their bottoms are engaged in the positioning holes 113. The upper ends of the two locking rods 124 are fixedly equipped with fixing blocks 126 by bolts. Springs 127 for controlling the reset of the locking rods 124 are sleeved on the upper ends of the two locking rods 124, and the springs 127 are located at the lower end of the fixing blocks 126.

[0038] A pull rod 128 is movably mounted on the upper end of the fixed block 3 126. The pull rod 128 can rotate in the middle of the fixed block 3 126. A locking block 129 for engaging with the locking slot 25 is fixedly mounted on the outer wall of the middle part of the pull rod 128, and the upper surface of the locking block 129 is rough. By pressing down the pull rod 128, the locking block 129 slides from the vertical groove of the limiting tube 24 to a position that is at the same horizontal height as the slot 25. Under the push of the fixing block 126, the locking rod 124 is simultaneously locked into the slot of the positioning hole 113. By rotating the pull rod 128, the locking block 129 slides into the slot of the slot 25. After releasing the pull rod 128, under the action of the spring 127, the upper surface of the locking block 129 abuts against the inner wall of the upper end of the slot 25, thereby limiting the locking block 129 and ensuring that the locking rod 124 is always locked into the positioning hole 113, thereby locking the position of the measuring component 120.

[0039] When the measuring component 120 needs to be retrieved, by pressing down the pull rod 128, the upper surface of the locking block 129 is moved away from the upper end of the slot wall of the slot 25. Then, by rotating the pull rod 128, the locking block 129 slides into the middle vertical slot of the limiting tube 24. Under the action of the spring 127, the fixing block 126 drives the locking block 129 at the upper end of the pull rod 128 to move upward. The locking rod 124 moves out of the slot cavity of the positioning hole 113 at the same time, thus releasing the limitation on the measuring component 120. The measuring component 120 can then be moved towards the fixing block 114.

[0040] A base plate 211 is fixedly installed at the bottom of the support plate 210. Two vertical rods are fixedly installed at the bottom of the support plate 210, and the base plate 211 is located at the bottom of the vertical rods. The base plate 211 can be bolted to the bottom vertical rods of the support plate 210. Slider blocks 212 are fixedly installed at both ends of the base plate 211, and positioning holes 213 are machined in the middle of the sliders 212.

[0041] An electric push rod 221 for controlling the vertical movement of the base plate 211 is installed in the middle of the U-shaped frame 220. The telescopic end of the electric push rod 221 is fixedly installed in the middle of the electric push rod 221. By activating the electric push rod 221, the support plate 210 moves upward and comes into contact with the top wall of the tunnel entrance. A scale plate 222 for indicating the movement distance of the base plate 211 is fixedly installed on the left side of the front end of the U-shaped frame 220. When the base plate 211 is on the support platform 111, the overall height of the support measuring device 01 is fixed. When the base plate 211 moves upward, the movement distance of the base plate 211 can be visually observed through the scale plate 222, thereby determining the movement distance of the support plate 210. By adding the movement distance of the support plate 210 to the overall height of the support measuring device 01, the vertical diameter of the subway tunnel entrance can be determined. Both ends of the U-shaped frame 220 are provided with multiple positioning holes 223 for positioning the slider 212 in conjunction with the insertion rod 224. When the support plate 210 moves upward and comes into contact with the tunnel top wall, the insertion rod 224 passes through the positioning holes 223 and 213 to fix the position of the support plate 210, so that the support plate 210 supports the tunnel top and prevents it from collapsing.

[0042] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this utility model. Furthermore, any non-creative modifications made to this utility model by those skilled in the art without inventive effort are still within the protection scope of this utility model.

Claims

1. A support measuring device for the diameter of a subway tunnel entrance, comprising a support measuring device (01), characterized in that: The supporting measuring device (01) includes a transverse measuring device (100) for transverse measurement of the tunnel entrance, and a longitudinal measuring device (200) for vertical measurement of the tunnel entrance is installed in the middle of the transverse measuring device (100). The transverse measuring device (100) includes a movable stage (110), with multiple positioning holes (113) on the left and right sides of the movable stage (110). A measuring component (120) is installed on the left and right sides of the middle part of the movable stage (110). A moving block (20) is installed at one end of the measuring component (120), and two locking rods (124) are installed at one end of the moving block (20) to cooperate with the positioning holes (113) to position the measuring component (120). The longitudinal measuring device (200) includes a second support plate (210), and the longitudinal measuring device (200) includes a U-shaped frame (220) for limiting the second support plate (210), and the U-shaped frame (220) includes a rod (224) for positioning the second support plate (210).

2. The subway tunnel entrance diameter support measuring device according to claim 1, characterized in that: The rear center of the mobile stage (110) is equipped with a support platform (111) for limiting the U-shaped frame (220). The center of the mobile stage (110) is equipped with a fixing block (114). The left and right ends of the fixing block (114) are equipped with magnetic blocks (115) for limiting the measuring component (120).

3. The subway tunnel entrance diameter support measuring device according to claim 1, characterized in that: The measuring component (120) includes a measuring rod (121), which is a square rod. The measuring rod (121) has a scale mark (122) on its body, and a support plate (123) is installed at one end of the measuring rod (121).

4. The subway tunnel entrance diameter support measuring device according to claim 2, characterized in that: The movable block (20) is equipped with a magnetic block two (21) for magnetic attraction with magnetic block one (115) at one end near the fixed block one (114). The movable block (20) is equipped with a movable wheel (22) at the lower end. The movable block (20) is equipped with a top cover (23) at the upper end. A limit tube (24) is installed on one side of the top cover (23). The upper inner wall of the limit tube (24) is machined with a groove (25), and the upper groove wall of the groove (25) is machined with a rough surface.

5. The subway tunnel entrance diameter support measuring device according to claim 4, characterized in that: The lower ends of the two locking rods (124) are equipped with fixing blocks two (125) to increase the mechanical strength of the locking rods (124), and the upper ends of the two locking rods (124) are equipped with fixing blocks three (126). The upper ends of the two locking rods (124) are fitted with springs (127) for controlling the reset of the locking rods (124), and the springs (127) are located at the lower end of fixing blocks three (126). The upper end of fixing blocks three (126) is movably equipped with a pull rod (128). The middle outer wall of the pull rod (128) is equipped with a locking block (129) for engaging with the locking groove (25), and the upper surface of the locking block (129) is rough.

6. The subway tunnel entrance diameter support measuring device according to claim 1, characterized in that: The bottom of the support plate 2 (210) is equipped with a base plate (211), and sliders (212) are installed at both the left and right ends of the base plate (211). The middle of the sliders (212) is machined with positioning holes 2 (213).

7. The subway tunnel entrance diameter support measuring device according to claim 6, characterized in that: An electric push rod (221) for controlling the bottom plate (211) to move up and down is installed in the middle of the U-shaped frame (220). A scale plate (222) for indicating the moving distance of the bottom plate (211) is installed on the left front end of the U-shaped frame (220). Multiple positioning holes (223) are provided at both the left and right ends of the U-shaped frame (220) for positioning the slider (212) in conjunction with the insertion rod (224).

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