Displacement slab staggering measuring device for small-radius curve shield segment

Abstract

The invention relates to the technical field of segment staggering testing, and particularly discloses a small-radius curve shield segment displacement staggering measuring device which comprises a rack, the rack comprises two arc-shaped rods with the same radian, the two arc-shaped rods are fixedly connected through a connecting beam, an arc-shaped sliding groove is formed in one side of each arc-shaped rod, a sliding block is slidably connected into each arc-shaped sliding groove, and the arc-shaped rods are fixedly connected with the connecting beam. A first electric telescopic rod is hinged between the sliding block and the side wall of the arc-shaped sliding groove, a cross beam is hinged to one side of the sliding block, a sliding sleeve is slidably connected to the cross beam, and a second electric telescopic rod is installed on the cross beam and used for driving the sliding sleeve to reciprocate along the cross beam; according to the small-radius curve shield segment displacement slab staggering measuring device, the segment is measured through the two symmetrically-arranged measuring rods, in the segment measuring process, if slab staggering occurs to the segment due to displacement, it can be ensured that the measuring rods cannot collide with the slab staggering, and the measurement accuracy is improved. And meanwhile, the dislocation measuring device can be operated without professional personnel.

Description

Technical Field

[0001] The invention relates to the technical field of segment displacement misalignment measurement, and in particular to a device for measuring segment displacement misalignment of a small-radius curved shield tunnel. Background Art

[0002] With the continuous development of social economy, in order to meet the growing demand for urban transportation, the construction of urban subways and underground projects is ushering in a period of rapid development. Shield construction has the advantages of small ground impact, high degree of mechanization, safety, low labor intensity, and fast progress. It has been widely used in the construction of urban subways and underwater tunnels in my country. However, shield construction will inevitably cause disturbances to the surrounding strata, causing surface subsidence. The key to controlling the surface subsidence of the shield tail lies in the effective filling of the shield tail gap. However, during shield excavation and shield tail gap grouting construction, tunnel segments often appear misaligned.

[0003] Segment misalignment refers to the dimensional deviation between adjacent segments in the same ring or segments in different rings after assembly. The former is called longitudinal misalignment and the latter is called circumferential misalignment. When the misalignment is too large, the connecting bolts between the segments are subjected to excessive shear force, which is prone to bolt shearing and stress concentration in the segments near the bolt holes, resulting in damage such as angle collapse and falling of segments near the bolt holes. The jack thrust acts on the ring surface of the segment, and the misalignment will cause the jack thrust to act eccentrically. The additional eccentricity generated by the jack thrust has a greater impact on the internal force distribution of the segment, which is easy to cause segment damage. In addition, excessive misalignment may also cause tunnel limit intrusion, which has an adverse effect on the waterproofness and durability of the segment.

[0004] During the shield tunnel construction process, the size of the lining segment misalignment is monitored through on-site measurement of the tunnel, so that a more realistic judgment can be made and the causes of the segment misalignment can be analyzed to guide the design and construction.

[0005] The existing technology for measuring the misalignment of lining segments includes the following three methods:

[0006] The first method is to use a three-dimensional laser measurement method, which simulates and derives the three-dimensional coordinates of each point of the lining segment by irradiating a fixed-point light source, and then uses a derivation method to measure the misalignment of the lining segment. On the one hand, this measurement method is too costly due to the high price of the equipment, and on the other hand, the measurement of the misalignment of the lining segment is in the form of simulation derivation, which leads to inaccurate accuracy.

[0007] The second method is to manually measure the misalignment of the lining segments using a measuring ruler. This method requires high manual technical skills and not only requires professional technicians to measure, but also has a slow measurement speed.

[0008] The third method is to use a displacement sensor to walk on the lining segment to measure the lining segment misalignment. On the one hand, it is difficult to find the highest point of the lining segment misalignment for measurement in this method. On the other hand, when the displacement sensor passes through a lining segment misalignment with a large displacement, the displacement sensor is prone to collide with the side wall of the lining segment, causing deformation of the displacement sensor mounting seat and affecting the subsequent measurement accuracy. Summary of the invention

[0009] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a small radius curved shield segment displacement misalignment measuring device, thereby solving the problems existing in the prior art.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A device for measuring displacement and misalignment of a small-radius curved shield segment comprises a frame, wherein the frame comprises two arc-shaped rods with the same curvature, the two arc-shaped rods are fixedly connected by a connecting beam, one side of each arc-shaped rod is provided with an arc-shaped slide groove, a slider is slidably connected in the arc-shaped slide groove, a first electric telescopic rod is hinged between the slider and the side wall of the arc-shaped slide groove, one side of the slider is hinged to a crossbeam, the crossbeam is slidably connected to a sliding sleeve, a second electric telescopic rod is installed on the crossbeam, the second electric telescopic rod is used to drive the sliding sleeve to reciprocate along the crossbeam, and a measuring component is installed on one side of the sliding sleeve.

[0012] Preferably, a third electric telescopic rod is hinged between the cross beam and the sliding block.

[0013] Preferably, it also includes a mounting frame, which is rotatably connected to a rotating shaft, and the rotating shaft is fixedly connected to a hanger, the lower side of the hanger is fixed to the frame, and a servo motor is installed on the mounting frame, and the servo motor is used to drive the rotating shaft to reciprocate.

[0014] Preferably, a mounting beam is mounted on one side of the mounting frame.

[0015] Preferably, the measuring assembly includes a base plate, a center hole is provided on the base plate, a measuring rod is slidably connected in the center hole, a scale is provided on the outer surface of the measuring rod, an expansion section is provided on the center hole, a ring is fixedly connected to the outer side of the measuring rod, and a first spring is fixedly connected between the ring and the top wall of the expansion section.

[0016] Preferably, a through groove is provided at the bottom of the measuring rod, and a sliding rod is slidably connected in the through groove, and a second spring is fixedly connected between the bottom of the through groove and the sliding rod, an avoidance groove connected to the through groove is provided on one side of the measuring rod, a through hole is provided on one side of the substrate, and an insertion rod is slidably connected in the through hole, and a mounting groove is provided in the middle of the through hole, a baffle is fixedly connected to the outer side of the insertion rod, and the third spring is fixedly connected to the side wall of the baffle and the mounting groove, and a plurality of insertion holes are provided on the crossbeam, and the insertion rod can be inserted into the insertion holes, and an inclined block is fixedly connected to one side of the sliding rod, and the inclined block is located in the avoidance groove. An inclined surface is provided at one end of the insertion rod, and the inclined block corresponds to the inclined surface.

[0017] The advantages of the present invention are as follows: a small radius curved shield segment displacement misalignment measuring device provided by the present invention measures the segment through two symmetrically arranged measuring rods. During the segment measurement process, if the segment is misaligned due to displacement, it can also be ensured that the measuring rod will not collide with the misalignment. At the same time, the misalignment measuring device can be operated without the need for professional personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a basic structural schematic diagram of the present invention;

[0019] Figure 2 yes Figure 1 Schematic diagram of some structures;

[0020] Figure 3 yes Figure 2 The enlarged view at N;

[0021] Figure 4 It is a basic structural diagram of the measurement component;

[0022] Figure 5 yes Figure 4 The enlarged view of M;

[0023] Figure 6 It is a usage state diagram of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the lining segment staggered. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figure 1-6 As shown, this embodiment discloses a device for measuring the displacement and misalignment of shield segments in a small radius curve, including a frame 3 and a mounting frame 1. The mounting frame 1 is a "door"-shaped structure. The mounting frame 1 is rotatably connected to a rotating shaft 11. A servo motor 12 is installed on the mounting frame 1. The servo motor 12 is used to drive the rotating shaft 11 to reciprocate. The rotating shaft 11 is fixedly connected to a hanger 2, and the lower side of the hanger 2 is fixed to the frame 3. A mounting beam 13 is installed on one side of the mounting frame 1. The misalignment measuring device of this embodiment is installed on a corresponding mobile vehicle through the mounting beam 13. At the same time, the rotating shaft 11 is driven to rotate by the servo motor 12, so that the frame 3 can make a circular motion, and the frame 3 is rotated in the tunnel, so that the misalignment of the segments at various positions in the tunnel can be measured.

[0027] The frame 3 includes two arc-shaped rods 31 with the same curvature. In actual use, the curvature of the arc-shaped rod 31 is the same as the curvature of the inner curved surface of the lining segment. The two arc-shaped rods 31 are fixedly connected by a connecting beam 32, so that the frame 3 is formed in a frame shape.

[0028] An arc-shaped slide groove 30 is provided on one side of each arc-shaped rod 31, and a slider 33 is slidably connected in the arc-shaped slide groove 30. A first electric telescopic rod 34 is hinged between the slider 33 and the side wall of the arc-shaped slide groove 30. The hinged form of the first electric telescopic rod 34 is the existing technology and will not be repeated here. In this way, the slider 33 can be pushed and pulled by the first electric telescopic rod 34, so that the slider 33 can slide back and forth in the arc-shaped slide groove 30.

[0029] One side of the slider 33 is hinged to the cross beam 4, and the third electric telescopic rod 41 is hinged between the cross beam 4 and the slider 33. The installation method of the third electric telescopic rod 41 is also the prior art, and the cross beam 4 is pushed by the third electric telescopic rod 41, so that the cross beam 4 swings back and forth with the slider 33 as the center.

[0030] The cross beam 4 is slidably connected to a sliding sleeve 42, and a second electric telescopic rod 43 is mounted on the cross beam 4. The second electric telescopic rod 43 is used to drive the sliding sleeve 42 to reciprocate along the cross beam 4. The installation method of the second electric telescopic rod 43 is also prior art, which will not be described in detail here.

[0031] A measuring assembly 5 is installed on one side of the sliding sleeve 42. The measuring assembly 5 includes a base plate 51. A center hole is provided on the base plate 51. A measuring rod 52 is slidably connected in the center hole. A scale is provided on the outer surface of the measuring rod 52. An expansion section 50 is provided on the center hole. A collar 53 is fixedly connected to the outer side of the measuring rod 52. A first spring 54 is fixedly connected between the collar 53 and the top wall of the expansion section 50. When measuring, the lower end of the measuring rod 52 contacts the lining segment. The specific measurement value can be obtained by the change of the scale of the measuring rod 52. The translation of the measuring rod 52 can measure each position of the lining segment. The measurement is performed symmetrically by two measuring rods 52. The two measuring rods 52 have the same walking path. In this way, when the scales of the two measuring rods 52 change inconsistently, it proves that the lining segment is misaligned.

[0032] In order to prevent the measuring rod 52 from hitting the misaligned platform and deforming the measuring rod 52, a through slot is provided at the bottom of the measuring rod 52, a sliding rod 55 is slidably connected in the through slot, a second spring 56 is fixedly connected between the bottom of the through slot and the sliding rod 55, a side of the measuring rod 52 is provided with an avoidance slot 58 connected to the through slot, a through hole is provided at one side of the base plate 51, a plug rod 7 is slidably connected in the through hole, a mounting slot 59 is provided in the middle of the through hole, a baffle 71 is fixedly connected to the outside of the plug rod 7, a third spring 72 is fixedly connected to the baffle 71 and the side wall of the mounting slot 59, a plurality of plug holes 49 are provided on the cross beam 4, the plug rod 7 can be inserted into the plug holes 49, an inclined block 57 is fixedly connected to one side of the sliding rod 55, the inclined block 57 is located in the avoidance slot 58, an inclined surface 73 is provided at one end of the plug rod 7, and the inclined block 57 corresponds to the inclined surface 73. At the same time, the elastic force of the first spring 54 should be greater than the elastic force of the second spring 56 and greater than the elastic force of the third spring 72. A spring-type telescopic rod 6 is arranged between the two measuring rods 52, and both ends of the spring-type telescopic rod 6 are fixedly connected to caps 61, and the two caps 61 are rotatably connected to the upper ends of the measuring rods 52 in a one-to-one correspondence. In this arrangement, the measuring rods 52 can be connected together.

[0033] When in use, the small radius curve shield segment displacement misalignment measuring device of this embodiment is installed on the mobile device in the prior art, and the rotating shaft 11 is arranged coaxially with the segment. In the initial state, the two crossbeams 4 are arranged symmetrically with the segment gap as the center. At this time, the two measuring rods 52 should both be in contact with the segment. If there is no contact, it proves that the segment is misaligned. If both are in contact, the first electric telescopic rod 34 pushes the slider 33 to move along the arc chute 30, so as to conduct a large-area test, and at the same time test whether the measuring rod 52 is always in contact with the segment. At the same time, the second electric telescopic rod 43 and the sleeve 42 can also be translated along the crossbeam 4, so that the measurement range can be expanded. The crossbeam 4 can also be pushed by the third electric telescopic rod 41, so that the crossbeam 4 swings back and forth with the slider 33 as the center, which further increases the area measured by the measuring rod, but the walking route of the measuring rod 52 must be symmetrical. During the movement of the measuring rod, it may move to the gap between the two segments. If there is a misalignment here, it may cause the measuring rod to collide with the misalignment. Therefore, when the measuring rod does not contact the pipe segment, it proves that there may be misalignment in front. At this time, the measuring rod is in a suspended state, so that the sliding rod 55 is lowered under the action of the second spring 56, and the inclined block 57 follows the rod 55 when it is lowered. When the inclined block 57 contacts the insertion rod, it generates a thrust on the push rod, so that the insertion rod is inserted into the insertion hole, so that the sliding sleeve 42 cannot be pushed or pulled by the second electric telescopic rod 43, so that the measuring rod 52 will not collide with the misalignment. By performing mobile measurement by the above method, the misalignment direction of the pipe segment after misalignment can be measured, and the size of each position of the pipe segment after misalignment can also be obtained, thereby completing the measurement of the pipe segment.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small radius curved shield segment displacement measurement device, characterized in that: The invention comprises a frame (3), wherein the frame (3) comprises two arc-shaped rods (31) with the same curvature, the two arc-shaped rods (31) are fixedly connected via a connecting beam (32), one side of each arc-shaped rod (31) is provided with an arc-shaped slide groove (30), a slider (33) is slidably connected in the arc-shaped slide groove (30), a first electric telescopic rod (34) is hinged between the slider (33) and the side wall of the arc-shaped slide groove (30), one side of the slider (33) is hinged to a cross beam (4), a sliding sleeve (42) is slidably connected to the cross beam (4), a second electric telescopic rod (43) is mounted on the cross beam (4), the second electric telescopic rod (43) is used to drive the sliding sleeve (42) to reciprocate along the cross beam (4), and a measuring component (5) is mounted on one side of the sliding sleeve (42).

2. The device for measuring displacement of shield segments in a small radius curve according to claim 1 is characterized in that: A third electric telescopic rod (41) is hingedly connected between the crossbeam (4) and the slider (33).

3. The device for measuring displacement of shield segments in a small radius curve according to claim 1 is characterized in that: The invention also comprises a mounting frame (1), the mounting frame (1) is rotatably connected to a rotating shaft (11), the rotating shaft (11) is fixedly connected to a hanger (2), the lower side of the hanger (2) is fixed to the frame (3), and a servo motor (12) is installed on the mounting frame (1), and the servo motor (12) is used to drive the rotating shaft (11) to reciprocate.

4. The device for measuring displacement of shield segments in a small radius curve according to claim 3 is characterized by: A mounting beam (13) is mounted on one side of the mounting frame (1).

5. The device for measuring displacement of shield segments in a small radius curve according to claim 1 is characterized in that: The measuring assembly (5) comprises a base plate (51), a central hole is provided on the base plate (51), a measuring rod (52) is slidably connected in the central hole, a scale is provided on the outer surface of the measuring rod (52), an enlarged section (50) is provided on the central hole, a collar (53) is fixedly connected to the outer side of the measuring rod (52), and a first spring (54) is fixedly connected between the collar (53) and the top wall of the enlarged section (50).

6. The device for measuring displacement of shield segments in a small radius curve according to claim 5 is characterized in that: The bottom of the measuring rod (52) is provided with a through slot, a slide bar (55) is slidably connected in the through slot, a second spring (56) is fixedly connected between the bottom of the through slot and the slide bar (55), one side of the measuring rod (52) is provided with an avoidance slot (58) connected to the through slot, one side of the base plate (51) is provided with a through hole, an insertion rod (7) is slidably connected in the through hole, a mounting slot (59) is provided in the middle of the through hole, and the outer side of the insertion rod (7) is fixedly connected to a baffle (71) ), the baffle (71) is fixedly connected to the side wall of the mounting groove (59) by a third spring (72), the cross beam (4) is provided with a plurality of insertion holes (49), the insertion rod (7) can be inserted into the insertion holes (49), an inclined block (57) is fixedly connected to one side of the slide rod (55), the inclined block (57) is located in the avoidance groove (58), an inclined surface (73) is provided at one end of the insertion rod (7), and the inclined block (57) corresponds to the inclined surface (73).

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