A new type of shield segment structure assembly test device and method

Abstract

The present invention discloses an assembly test device for a new shield segment structure, comprising: two columns, which are arranged on a workbench at intervals; a reaction beam, which is located between the two columns and detachably connected to the two columns; a jack, which is fixed to the bottom of the reaction beam; a mounting seat, which is arranged below the jack between the two columns and fixedly connected to the workbench, and the mounting seat is provided with two mounting grooves symmetrically arranged along its length direction, which are used to install adjacent blocks and limit their lateral displacement; a plurality of first thin sheets, which are arranged on the inner side walls of the mounting grooves and are used to adjust the misalignment between two adjacent blocks. In the present invention, the assembly of the new shield segment is tested according to the set misalignment under the condition that a rubber water stop strip is used to replace a water-expandable water stop strip, and the allowable range of misalignment that can ensure both smooth assembly of the segment and the water-stopping effect of the segment is obtained, which is convenient for controlling the misalignment of the segment in actual construction and improving construction efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of underground shield construction, and more specifically, to an assembly test device and method for a novel shield segment structure. Background Art

[0002] The development of large-section tunnels has led to the widespread use of shield methods in the construction of large underwater tunnels. The shield tunnel structure is assembled from prefabricated segments. Conventional segments are usually assembled by bolting. The bolting method is low in cost, but has poor reliability and is prone to problems such as hole position deviation and leakage. In addition, the efficiency of manual tightening is low, and the connection strength and rigidity are poor. At present, there is a new CT-type segment originating from Japan. The segments are connected by C-type and T-type connectors. It has the advantages of high strength and rigidity, automatic connection during assembly, and no manual operation. However, the water stop strip of the segment adopts a water-expanding water stop strip. In actual construction, there is a problem of unstable water stop effect. In addition, the connection accuracy of the new segment CT is high. Once the misalignment of the segment exceeds the limit, it cannot be assembled successfully.

[0003] Since the above-mentioned new pipe segments are rarely used in China, there is not enough reference data to control the misalignment during installation of the pipe segments in actual construction. Improper control of the misalignment may lead to problems such as failure to successfully assemble the pipe segments or failure to effectively stop water after assembly. Therefore, it is necessary to provide an assembly test device and method for a new pipe segment structure. Summary of the invention

[0004] The purpose of the present invention is to provide an assembly test device and method for a new shield segment structure. When a rubber waterstop strip is used instead of a water-swelling waterstop strip, the assembly of the new shield segment is tested according to the set misalignment amount, and an allowable range of misalignment amount is obtained that can ensure both smooth assembly of the segments and the water-stopping effect of the segments. This facilitates the staff to control the misalignment amount in actual shield construction and improves construction efficiency and quality.

[0005] In order to achieve these purposes and other advantages according to the present invention, a novel assembly test device for shield segment structure is provided, comprising:

[0006] two uprights, spaced apart and arranged on the workbench;

[0007] A reaction beam, which is located between the two columns and is detachably connected thereto;

[0008] a jack fixed to the bottom of the reaction beam;

[0009] A mounting seat, which is arranged below the jack between the two columns, the mounting seat is fixedly connected to the workbench, and the mounting seat is provided with two mounting grooves symmetrically arranged along its length direction, the mounting grooves are used to install adjacent blocks of the pipe segment and limit their lateral displacement;

[0010] A plurality of first thin sheets are detachably arranged on the inner side wall of the installation groove, and the plurality of first thin sheets are used to adjust the offset between two adjacent blocks.

[0011] Preferably, the assembly test device of the novel shield segment structure further comprises a top hoop, which is arranged between the jack and the mounting seat, and the top hoop is used to limit the lateral relative displacement between the shield capping block of the segment and the adjacent block.

[0012] Preferably, the assembly test device of the novel shield segment structure further comprises a plurality of second thin sheets, which are respectively arranged on the inner side walls of the top hoop and correspond one-to-one to the positions of the first thin sheets.

[0013] Preferably, in the assembly test device of the novel shield segment structure, the two mounting grooves are formed by cooperation of four limit plates, the four limit plates are symmetrically arranged in pairs at the four corners of the mounting seat and are detachably connected to the top thereof, any limit plate is an L-shaped structure, the limit plate is perpendicular to the mounting seat, and the L-shaped side of the limit plate is detachably connected to the top of the mounting seat, and the openings of two adjacent limit plates are arranged opposite to each other and face into the mounting seat.

[0014] Preferably, in the assembly test device of the novel shield segment structure, a stiffening rib plate is further provided on the outer side of the limit plate, and the stiffening rib plates are arranged at intervals along the length direction of the limit plate and are detachably connected to the top of the mounting seat.

[0015] Preferably, in the assembly test device of the novel shield segment structure, a mounting hole is provided in the middle of the top surface of the mounting seat, which is arranged corresponding to the shear pin at the bottom of the shield capping block of the segment, and when the shield capping block is engaged with the adjacent block of the segment, the mounting hole and the shear pin are engaged with each other.

[0016] The present invention also provides a novel assembly test method for shield segment structure, comprising:

[0017] S1. Assemble the assembly test device of the new shield segment structure and fix it on the workbench;

[0018] S2. Remove the reaction beam and the jack, and hoist the two adjacent blocks of the pipe segment onto the mounting seat respectively, with the bottom of any adjacent block being arranged in the mounting groove;

[0019] S3, using the first sheet to adjust the positions of the two adjacent blocks in the corresponding installation grooves and the distance between the two adjacent blocks according to the set misalignment amount;

[0020] S4, installing a top hoop on the top of the two adjacent blocks, and clamping a second thin sheet between the top hoop and the two adjacent blocks, which has the same size and quantity as the first thin sheet and has a one-to-one corresponding position;

[0021] S5, hoisting the shield capping block of the segment, so that it passes vertically downward through the top hoop and is inserted between the two adjacent blocks, until the shield capping block is tightly fitted with the adjacent blocks;

[0022] S6, reinstall the reaction beam and the jack, and use the jack to continue to push the shield capping block vertically downward until the shield capping block is engaged with the C and T connectors on the adjacent blocks and snapped into place;

[0023] S7, observe whether the C and T connectors on the shield capping block and the adjacent block can be aligned and completely snapped into place during the vertical downward movement of the shield capping block. If the C and T connectors cannot be aligned or cannot be completely snapped into place, it is judged that the current misalignment does not meet the segment assembly requirements; at the same time, observe whether the shear pins at the bottom of the shield capping block and the mounting holes on the mounting seat can be aligned and plugged in. If the shear pins and the mounting holes are misaligned, it is judged that the installation direction of the shield capping block does not meet the segment assembly requirements and needs to be disassembled and reinstalled;

[0024] If the C and T connectors can be fully fitted and snapped into place and the shear pins and the mounting holes can be plugged into place, observe whether the rubber water stop strip between the shield capping block and the adjacent block is curled. If the curling degree of the rubber water stop strip exceeds the set range, it is judged that the current misalignment does not meet the water stopping requirements of the pipe segment.

[0025] Preferably, in the assembly test method of the novel shield segment structure, the curling range of the rubber water stop strip is set as follows: the sum of the curling amplitudes of the rubber water stop strips at both ends of the shield capping block does not exceed 3 mm.

[0026] The present invention has at least the following beneficial effects:

[0027] 1. The misalignment of the shield segments is tested by the test device to ensure that it meets the construction requirements, and the allowable range of misalignment that can be used as a control benchmark is obtained, which is convenient for controlling the installation quality of the shield segments;

[0028] 2. Verify the applicability of the rubber water stop strip for the new CT connection structure, and judge whether it can effectively stop water in the current state by the state of the rubber water stop strip after assembly, so as to further ensure the water stop effect of the shield segment;

[0029] 3. The test device in the present invention has a simple structure and is easy to operate. After completing the test on shield segments of the same specification, the obtained misalignment range can be used as a reference control value for such segments without repeated measurement. The obtained misalignment range is accurate and effective and meets the requirements of on-site construction. It can avoid problems such as inability to assemble and water leakage caused by excessive misalignment in actual construction, thereby improving construction efficiency and quality.

[0030] 4. Through the detachable installation slot structure, the size and spacing of the limit plate can be adaptively adjusted according to different segment specifications, so that the test device can be suitable for assembly tests of segments of various specifications. There is no need to re-make a matching test device when testing new shield segments of other specifications, which has high practicality.

[0031] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic side structural diagram of an assembly test device for a novel shield segment structure according to an embodiment of the present invention;

[0033] Figure 2 It is a front structural schematic diagram of an assembly test device for the novel shield segment structure described in the above embodiment;

[0034] Figure 3 is a front structural schematic diagram of the mounting base described in the above embodiment;

[0035] Figure 4 is a schematic diagram of the planar structure of the mounting base described in the above embodiment;

[0036] Figure 5 It is a schematic diagram of the planar structure of the top hoop described in the above embodiment;

[0037] Figure 6 is a schematic diagram of the planar structure of the tube segment described in the above embodiment;

[0038] Figure 7 It is a schematic diagram of the connection structure between the shield capping block and the adjacent block in the above embodiment.

[0039] Description of reference numerals:

[0040] 1. Column, 2. Reaction beam, 3. Jack, 4. Top hoop, 5. Segment, 5-1. Adjacent block, 5-2. Shield capping block, 6. Mounting seat, 7. C connector, 8. T connector, 9. Limit plate, 10. Stiffening rib plate, 11. Shear pin. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0042] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] like Figure 1-7 As shown, the present invention provides an assembly test device for a novel shield segment structure, comprising:

[0044] Two columns 1 are arranged on the workbench at intervals;

[0045] A reaction beam 2, which is located between the two columns 1 and is detachably connected thereto;

[0046] A jack 3, which is fixed at the bottom of the reaction beam 2;

[0047] A mounting seat 6 is provided below the jack 3 between the two columns 1, the mounting seat 6 is fixedly connected to the workbench, and the mounting seat 6 is provided with two mounting grooves symmetrically arranged along its length direction, the mounting grooves are used to install the adjacent blocks 5-1 of the pipe segment 5 and limit its lateral displacement;

[0048] A plurality of first thin sheets are detachably arranged on the inner side wall of the installation groove, and the plurality of first thin sheets are used to adjust the offset between the two adjacent blocks 5 - 1 .

[0049] In the above technical scheme, the new shield segment is an improved segment based on the Japanese CT type segment, and a more mature rubber water stop strip is used to replace the water-swellable water stop strip in the original CT type segment. The new shield segment includes two adjacent blocks 5-1, a shield capping block 5-2, and multiple standard blocks, wherein the shield capping block 5-2 of the segment 5 is arranged between the two adjacent blocks 5-1 and connected to the adjacent blocks 5-1 through C and T connectors. The rubber water stop strip is arranged on the contact surface between the shield capping block 5-2 and the two adjacent blocks 5-1 and does not affect the docking of the C and T connectors. The C connector is a C-shaped connector with its opening facing outward, and the T connector is a T-shaped connector with its top facing outward. The top of the T of the T connector 8 can be inserted into the C-shaped groove of the C connector 7, and the C connector 7 limits the displacement of the T connector 8 in the C-shaped plane. In this embodiment, two groups of CT connectors are provided between any adjacent block 5-1 and the shield capping block 5-2, and any group of CT connectors includes a C connector 7 and a T connector 8. Among the CT connectors at one end close to the inner side of the segment 5, the C connector 7 is arranged on the side wall of the shield capping block 5-2, and the T connector 8 is arranged on the side wall of the adjacent block 5-1; among the CT connectors at one end close to the outer side of the segment 5, the C connector 7 is arranged on the side wall of the adjacent block 5-1, and the T connector 8 is arranged on the side wall of the shield capping block 5-2. The C connector 7 is arranged near the inner / outer end of the segment 5 and is located in a groove opened on the side wall of the segment and connected to the inside / outside. The T connector 8 is arranged on the side wall of the segment 5 and corresponds to the position of the corresponding C connector 7. Therefore, when the shield capping block 5-2 is docked with the adjacent block 5-1, the shield capping block 5-2 is spliced ​​from the outside to the inside of the segment 5, and the C connector of the shield capping block 5-2 first enters the contact surface of the adjacent block 5-1. Since the C connector 7 is arranged in the groove, it will not affect the sliding splicing of the shield capping block 5-2 to the inside of the segment 5 until the C connector 7 and the T connector of the adjacent block 5-1 are connected. 8 is fully docked. At this time, since the C connector 7 is located at the end of the groove, after the C connector 7 and the T connector 8 are fully docked, the T connector 8 abuts against the end of the groove, so that the C connector cannot continue to move to the inside of the segment; similarly, the T connector of the shield capping block 5-2 enters the contact surface through the groove of the C connector of the adjacent block 5-1, and is fully docked with the C connector of the adjacent block 5-1, that is, the boltless assembly of the shield capping block 5-2 and the adjacent block 5-1 is completed. This connection method has a simple structure and a stable connection. The C and T connector structure with fixed structural dimensions effectively prevents installation errors during the segment splicing process. A rubber water stop strip is provided between the shield capping block 5-2 and the adjacent block 5-1. After the C and T connectors are docked, the gap between the shield capping block 5-2 and the adjacent block 5-1 can be effectively closed to prevent water from seeping from the outside of the segment to the inside of the segment after the segment is installed.Since the above-mentioned new shield segment structure has not been fully utilized in actual shield construction, and the C and T connectors have high requirements for installation accuracy, once the misalignment of the segments exceeds the range, the segments cannot be successfully assembled. Therefore, the test device in the present invention is needed to test and verify the allowable misalignment range of the new shield segments that use C, T connectors and rubber water stop strips at the same time.

[0050] Specifically, the mounting seat 6 is a steel plate, the first thin sheet is a thin steel sheet, and the thickness of any thin steel sheet is the same. The two adjacent blocks 5-1 of the pipe segment 5 are mounted on the mounting seat 6 through the mounting groove and are located below the jack 3. The positions and sizes of the two mounting grooves are set according to the actual assembly of the pipe segment (simulating the actual assembly state of the pipe segment), and the two adjacent blocks 5-1 are relatively arranged in the two mounting grooves. The width of the two mounting grooves is equal to the sum of the design width of the pipe segment and the set (width direction) maximum misalignment, and the distance between the outermost ends of the two mounting grooves is equal to the sum of the design length (end point distance) of the two adjacent blocks and the set (length direction) maximum misalignment. The thickness of the first thin sheet is selected according to the set misalignment amount. In the present embodiment, the misalignment amount selected for the tested segment is in the range of 0-3mm (it is estimated that it cannot be installed if it exceeds 3mm). A first thin sheet with a thickness of 1mm is selected, and the test is started from the maximum misalignment amount in the test range. Two adjacent blocks 5-1 are respectively abutted against the outermost ends of the two mounting grooves, one adjacent block 5-1 is arranged close to one side of the mounting groove, and the other adjacent block 5-1 is arranged close to the other side of the mounting groove. Three first thin sheets are stuck in the gap between any adjacent block 5-1 and the mounting groove. At this time, the misalignment amount (in the width direction) between the two adjacent blocks 5-1 is set to 3mm, and the misalignment amount (in the length direction) between the two adjacent blocks 5-1 is set to 3mm. The shield capping block 5-2 is assembled using a new shield segment structure assembly test device. The shield capping block 5-2 is inserted from top to bottom between two adjacent blocks 5-1, and the shield capping block 5-2 is pushed vertically downward using the jack 3. It is observed whether the C and T connectors on the shield capping block 5-2 and the adjacent block 5-1 can be aligned and completely docked, so as to determine whether the currently set misalignment meets the segment assembly requirements; at the same time, the displacement of the rubber water stop strip between the shield capping block 5-2 and the adjacent block 5-1 after assembly is observed, and the degree of deformation such as expansion and contraction and curling of the rubber water stop strip is determined to determine whether the currently set misalignment meets the segment water stop requirements. Then, by adjusting the position of the first thin sheet, the misalignment between the adjacent blocks 5-1 in the set length and width directions is reduced in turn, until the maximum misalignment data that meets both the segment assembly requirements and the water stop requirements is obtained by testing, that is, the allowable misalignment range of the tested segment during assembly is obtained.

[0051] The assembly test device of the novel shield segment structure of the present invention can simulate the assembly structure of the segment in actual construction. By arranging different numbers of first thin sheets at different positions between the adjacent blocks and the installation grooves, the function of manually setting the segment misalignment and testing its assembly performance can be realized. The assembly and water-stopping performance of the segment under different misalignments are verified according to the connection states of C, T connectors and rubber water-stop strips in the internal structure of the segment, and the allowable misalignment range of the novel shield segment during installation is obtained, so as to quickly and smoothly complete the segment assembly while ensuring the installation quality of the segment, thereby improving the construction quality and efficiency of the shield segment.

[0052] In another technical solution, the assembly test device of the novel shield segment structure further includes a top hoop 4, which is arranged between the jack 3 and the mounting seat 6, and the top hoop 4 is used to limit the lateral relative displacement between the shield capping block 5-2 of the segment 5 and the adjacent block 5-1. The top hoop 4 is a closed plane frame structure formed by connecting several steel bars, which is sleeved on the top periphery of the two adjacent blocks 5-1 and forms a lateral limiting structure between the two adjacent blocks 5-1, so that when the shield capping block 5-2 is inserted between the two adjacent blocks 5-1 from above the top hoop 4, the lateral limiting structure formed by the top hoop 4 can play a role in preliminary alignment and positioning of the installation of the shield capping block 5-2, and limit the side wall of the shield capping block 5-2 when it continues to move downward, so as to ensure that the shield capping block 5-2 is always in a state of vertical downward movement, and prevent the shield capping block 5-2 from horizontal displacement during the assembly process, resulting in assembly dislocation. Since the top hoop 4 is fixed to the two adjacent blocks 5-1, it has good stability and will not deviate under the influence of the shield capping block 5-2, thereby ensuring the limiting effect.

[0053] In another technical solution, the assembly test device of the novel shield segment structure further includes a plurality of second thin sheets, which are respectively arranged on the inner side wall of the top hoop 4 and correspond one-to-one with the position of the first thin sheet. In the above technical solution, a plurality of second thin sheets are clamped between the top hoop 4 and the adjacent block 5-1, and the size and quantity of the second thin sheets are the same as those of the first thin sheets, and the installation positions of the plurality of second thin sheets correspond one-to-one with the plurality of first thin sheets, so that the limiting distances between the top and the bottom of the adjacent block 5-1 are the same, so as to avoid the shield capping block 5-2 from pressing down during the test and the adjacent block 5-1 from twisting after being subjected to a large pressure, which affects the accuracy of the experimental results. In this embodiment, since the second thin sheet is suspended, in order to prevent the second thin sheet from falling during the test, the second thin sheet is designed to be an inverted L-shape, with its horizontal portion overlapping the top of the top hoop 4 and its vertical portion close to the inner wall of the top hoop 4. When multiple second thin sheets are provided at the same position, the multiple second thin sheets overlap in sequence until the gap between the adjacent block 5-1 and the top hoop 4 is filled.

[0054] In another technical solution, in the assembly test device of the novel shield segment structure, the two installation slots are formed by four limit plates 9, the four limit plates 9 are symmetrically arranged at the four corners of the mounting seat 6 and are detachably connected to the top thereof, any limit plate 9 is an L-shaped structure, the limit plate 9 is perpendicular to the mounting seat 6, and the L-shaped side of the limit plate 9 is detachably connected to the top of the mounting seat 6, and the openings of two adjacent limit plates 9 are arranged oppositely and face the inside of the mounting seat 6. Specifically, the mounting seat 6 is provided with a plurality of positioning threaded holes, the limit plates 9 can be fixed on the mounting seat 6 by bolts, the size of the installation slot can be adjusted by removing the limit plates 9 and adjusting their positions (length direction and width direction) on the mounting seat 6, so that the size of the installation slot can adapt to the test of segments of different sizes and different misalignment amounts, when testing segments of different sizes or segments of the same size but with different installation positions of C and T connectors, it is not necessary to re-make the test device, and the test can be carried out by adjusting the size of the installation slot accordingly, thereby improving the applicability of the test device and saving material costs.

[0055] In another technical solution, in the assembly test device of the novel shield segment structure, the outer side of the limit plate 9 is also provided with a stiffening rib plate 10, which is arranged at intervals along the length direction of the limit plate 9 and is detachably connected to the top of the mounting seat 6. Since the limit plate 9 is an L-shaped structure and is perpendicular to the mounting seat 6, when the shield capping block 5-2 is assembled, a large lateral pressure will be generated on the two adjacent blocks 5-1. The adjacent blocks 5-1 remain stable under the action of the limit plate 9. At this time, the limit plate 9 is subjected to a large lateral force, and the connection between the limit plate 9 and the mounting seat 6 is prone to loosening, resulting in problems such as unstable or ineffective limiting action; therefore, a stiffening rib plate 10 is added to the outer side of the limit plate 9, which is a plurality of triangular angle plates. The stiffening rib plate 10 is perpendicular to the limit plate 9 and connected to the outer side wall of the limit plate 9. When the limit plate 9 is subjected to a lateral force, the pressure is dispersed to the mounting seat 6 through the plurality of angle plates, preventing the limit plate 9 from being deformed by force, thereby ensuring the stability of the limit.

[0056] In another technical solution, in the assembly test device of the novel shield segment structure, a mounting hole is provided in the middle of the top surface of the mounting seat 6, which is arranged corresponding to the shear pin 11 at the bottom of the shield capping block 5-2 of the segment 5, and when the shield capping block 5-2 is engaged with the adjacent block 5-1 of the segment 5, the mounting hole and the shear pin 11 are engaged with each other. In the above technical scheme, a mounting hole is set on the top surface of the mounting seat 6. When the bottom of the shield capping block 5-2 moves to the vicinity of the mounting seat 6, the shear pin 11 can be inserted into the mounting hole accordingly, which means that the installation position of the shield capping block 5-2 is correct (vertically downward, installed in alignment with the adjacent block 5-1); when the shear pin 11 is misaligned with the mounting hole, it can be judged that the assembly direction of the shield capping block 5-2 is misaligned, and it needs to be disassembled and reinstalled to ensure that the installation direction and installation position of the shield capping block 5-2 are correct, so as to prevent the misalignment data obtained from the test from being inaccurate due to the misalignment of the installation direction of the shield capping block 5-2.

[0057] The present invention also provides a novel assembly test method for shield segment structure, comprising:

[0058] S1. Assemble the assembly test device of the new shield segment structure and fix it on the workbench;

[0059] S2, remove the reaction beam 2 and the jack 3, and respectively hoist the two adjacent blocks 5-1 of the pipe segment 5 onto the mounting seat 6, with the bottom of any adjacent block 5-1 being arranged in the mounting groove;

[0060] S3, according to the set misalignment amount, using the first sheet to adjust the positions of the two adjacent blocks 5-1 in the corresponding installation grooves and the distance between the two adjacent blocks 5-1;

[0061] S4, installing a top hoop 4 on the top of the two adjacent blocks 5-1, and clamping a second sheet between the top hoop 4 and the two adjacent blocks 5-1, which has the same size and quantity as the first sheet and has a one-to-one corresponding position;

[0062] S5, hoisting the shield capping block 5-2 of the segment 5, so that it passes vertically downward through the top hoop 4 and is inserted between the two adjacent blocks 5-1, until the shield capping block 5-2 is tightly fitted with the adjacent blocks 5-1;

[0063] S6, reinstall the reaction beam 2 and the jack 3, and use the jack 3 to continue to push the shield capping block 5-2 vertically downward until the shield capping block 5-2 is engaged with the C and T connectors on the adjacent block 5-1 and snapped into place;

[0064] S7, observe whether the C and T connectors on the shield capping block 5-2 and the adjacent block 5-1 can be aligned and completely snapped into place during the vertical downward movement of the shield capping block 5-2. If the C and T connectors cannot be aligned or cannot be completely snapped into place, it is judged that the current misalignment does not meet the segment assembly requirements; at the same time, observe whether the shear pin 11 at the bottom of the shield capping block 5-2 and the mounting hole on the mounting seat 6 can be aligned and plugged in. If the shear pin 11 and the mounting hole are misaligned, it is judged that the installation direction of the shield capping block 5-2 does not meet the segment assembly requirements and needs to be disassembled and reinstalled;

[0065] If the C and T connectors can be fully fitted and snapped into place and the shear pin 11 and the mounting hole can be plugged into place, observe whether the rubber water stop strip between the shield capping block 5-2 and the adjacent block 5-1 is curled. If the curling degree of the rubber water stop strip exceeds the set range, it is judged that the current misalignment does not meet the water stopping requirements of the pipe segment.

[0066] In the above technical scheme, affected by the connection mode of C and T connectors, the assembly accuracy requirements of the adjacent block 5-1 and the shield capping block 5-2 are very high. If the misalignment exceeds the actual allowable range, it will cause the problem that the pipe segments cannot be assembled. It is necessary to conduct tests before assembling the pipe segments of the same batch (same specifications) to verify the range of the allowable assembly misalignment, so as to facilitate the control of the misalignment in actual construction. In addition, when verifying the assemblability of the set misalignment, due to the use of rubber waterstop strips different from the original water-swelling waterstop strips, there are large differences in their materials and performance. During the assembly of the shield capping block 5-2, the waterstop will not be subjected to the extrusion pressure in the length direction. After the C and T connectors are fully connected, the rubber waterstop may bend and deform due to the extrusion pressure along the length direction due to the misalignment of the assembly structure. To ensure that the segment still has a good and reliable waterproof effect after replacing the waterstop, it is necessary to observe and measure the displacement of the rubber waterstop while verifying the assemblability of the segment. If there is excessive expansion or curling, it proves that the existing misalignment cannot meet the quality requirements of the segment waterstop, and the range of the misalignment needs to be further reduced. During the test, the initial setting of the misalignment is the maximum allowable misalignment of the tested segment determined based on experience. The number and position of the first thin sheet are set according to the misalignment data, and the misalignment between the two adjacent blocks 5-1 is adjusted to the required value. After the test is completed, if the segment can be completely assembled and the rubber water stop has not been excessively deformed, it proves that the current misalignment range is reasonable; if the segment cannot be completely assembled or the rubber water stop has been excessively deformed, the position of the first thin sheet is adjusted to reduce the misalignment between the two adjacent blocks 5-1 to the next specified value, and the test is repeated until the test obtains a misalignment that allows the segment to be completely assembled and the rubber water stop will not be excessively deformed. The misalignment at this time is the value of the maximum misalignment allowed for the segment installation.

[0067] In another technical solution, in the assembly test method of the novel shield segment structure, the curling range of the rubber water stop strip is set as follows: the sum of the curling amplitudes of the rubber water stop strips at both ends of the shield capping block 5-2 does not exceed 3mm. Specifically, the sum of the curling amplitudes of the rubber water stop strips at both ends of the shield capping block 5-2 at any position should not exceed 3mm, otherwise it means that the rubber water stop strip has been excessively deformed due to excessive extrusion or segment misalignment during the segment assembly process, and the water-stopping effect of the segment can no longer be guaranteed. Therefore, once the curling amplitude of the rubber water stop strip exceeds the standard, it means that the misalignment amount of the current test does not meet the requirements of the segment water-stopping effect. The misalignment amount should be reduced and the test should be repeated. When the curling amplitude is too large, a new rubber water stop strip needs to be replaced and retested to ensure the accuracy of the test results.

[0068] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A new type of shield segment structure assembly test device, characterized in that: include: two uprights, spaced apart and arranged on the workbench; A reaction beam, which is located between the two columns and is detachably connected thereto; a jack fixed to the bottom of the reaction beam; A mounting seat is arranged below the jack between the two columns, the mounting seat is fixedly connected to the workbench, and the mounting seat is provided with two mounting grooves symmetrically arranged along its length direction, and the mounting grooves are used to install the adjacent blocks of the pipe segment and limit their lateral displacement; a mounting hole is arranged in the middle of the top surface of the mounting seat, which is arranged correspondingly to the shear pin at the bottom of the shield capping block of the pipe segment, and when the shield capping block is clamped with the adjacent block of the pipe segment, the mounting hole and the shear pin are plugged in cooperation; A plurality of first thin sheets, which are detachably arranged on the inner side wall of the installation groove, and the plurality of first thin sheets are used to adjust the misalignment between two adjacent blocks; A top hoop is arranged between the jack and the mounting seat, and is used to limit the lateral relative displacement between the shield capping block of the segment and the adjacent block.

2. The assembly test device of the new shield segment structure according to claim 1 is characterized in that: It also includes a plurality of second thin sheets, which are respectively arranged on the inner side walls of the top hoop and correspond one-to-one to the positions of the first thin sheets.

3. The assembly test device of the new shield segment structure according to claim 1 is characterized in that: The two mounting grooves are formed by four limit plates, and the four limit plates are symmetrically arranged in pairs at the four corners of the mounting seat and are detachably connected to the top of the mounting seat. Any limit plate is an L-shaped structure, and the limit plate is perpendicular to the mounting seat, and the L-shaped side of the limit plate is detachably connected to the top of the mounting seat, and the openings of two adjacent limit plates are arranged opposite to each other and face the inside of the mounting seat.

4. The assembly test device of the new shield segment structure according to claim 3 is characterized in that: A stiffening rib plate is also provided on the outer side of the limiting plate. The stiffening rib plates are arranged at intervals along the length direction of the limiting plate and are detachably connected to the top of the mounting seat.

5. An assembly test method based on the assembly test device of the new shield segment structure according to claim 2, characterized in that: include: S1. Assemble the assembly test device of the new shield segment structure and fix it on the workbench; S2. Remove the reaction beam and the jack, and hoist the two adjacent blocks of the pipe segment onto the mounting seat respectively, with the bottom of any adjacent block being arranged in the mounting groove; S3, using the first sheet to adjust the positions of the two adjacent blocks in the corresponding installation grooves and the distance between the two adjacent blocks according to the set misalignment amount; S4, installing a top hoop on the top of the two adjacent blocks, and clamping a second thin sheet between the top hoop and the two adjacent blocks, which has the same size and quantity as the first thin sheet and has a one-to-one corresponding position; S5, hoisting the shield capping block of the segment, so that it passes vertically downward through the top hoop and is inserted between the two adjacent blocks, until the shield capping block is tightly fitted with the adjacent blocks; S6, reinstall the reaction beam and the jack, and use the jack to continue to push the shield capping block vertically downward until the shield capping block is engaged with the C and T connectors on the adjacent blocks and snapped into place; S7, observe whether the C and T connectors on the shield capping block and the adjacent block can be aligned and completely snapped into place during the vertical downward movement of the shield capping block. If the C and T connectors cannot be aligned or cannot be completely snapped into place, it is judged that the current misalignment does not meet the segment assembly requirements; at the same time, observe whether the shear pins at the bottom of the shield capping block and the mounting holes on the mounting seat can be aligned and plugged in. If the shear pins and the mounting holes are misaligned, it is judged that the installation direction of the shield capping block does not meet the segment assembly requirements and needs to be disassembled and reinstalled; If the C and T connectors can be fully fitted and snapped into place and the shear pins and the mounting holes can be plugged into place, observe whether the rubber water stop strip between the shield capping block and the adjacent block is curled. If the curling degree of the rubber water stop strip exceeds the set range, it is judged that the current misalignment does not meet the water stopping requirements of the pipe segment.

6. The assembly test method according to claim 5, characterized in that: The curling range of the rubber water stop strip is set as follows: the sum of the curling amplitudes of the rubber water stop strips at both ends of the shield capping block does not exceed 3 mm.

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