Transition support pre-adjusting mechanism of shield segment full-scale self-adaptive loading device

Abstract

The utility model relates to a transition support pre-adjustment mechanism of a shield segment full-size self-adaptive loading device, in particular to a transition support pre-adjustment mechanism of a shield segment full-size self-adaptive loading device, which comprises a head end connecting piece and a tail end connecting piece, and a standard segment and a non-standard segment are arranged between the head end connecting piece and the tail end connecting piece. The standard sections and the non-standard sections are alternately connected; the standard sections are fixedly provided with connecting columns, and the non-standard sections are fixedly provided with connecting sleeves. The connecting sleeve is provided with a receding structure, the receding structure is connected with a limiting block, the connecting column can drive the receding structure to act through the limiting block, and after butt joint is completed, the receding structure can limit the connecting column through the limiting block; a locking structure is further arranged on the connecting sleeve, a supporting plate is connected to the locking structure, and the locking structure can limit the rotating direction of the supporting plate.

Description

Technical Field

[0001] The utility model relates to an excessive bracket pre-adjustment of a full-scale self-adaptive loading device for a shield tunnel segment, in particular to an excessive bracket pre-adjustment mechanism of the full-scale self-adaptive loading device for a shield tunnel segment. Background Art

[0002] Shield segments are the primary components of shield construction, used in tunnel construction to resist soil pressure, groundwater pressure, and other special loads. They are the permanent lining structure of shield tunnels, and their quality is directly related to the overall quality and safety of the tunnel, affecting its waterproofing and durability.

[0003] The shield segment full-scale adaptive loading device is a device involved in underground engineering technology. It consists of an annular reaction wall, a test loading device, and a support device. This device is used to automatically apply normal loads to the assembled shield segment ring. The test loading device is installed on the annular reaction wall to restore the actual stress state and disease development mechanism of the shield segment. This device can record the interaction characteristics between the shield segment ring and the soil under passive load. By combining relevant data such as tunnel cross-section measurement data, it provides important technical support for underground engineering.

[0004] When the shield segment full-scale adaptive loading device is in use, the experimental loading device and the annular reaction wall are connected by an intermediate bracket. Since the diameter of each tunnel is different, the diameter of the shield segment ring used for testing is also different. Therefore, the length of the intermediate bracket needs to be determined according to the diameter of the shield segment ring to be tested. In actual use, the length of the intermediate bracket needs to be adjusted as needed. The length can be changed by removing or adding segments. When using it, it is necessary to confirm the stability of the connection between each segment. The most common way to connect the segments is to use bolts.

[0005] When using bolt connections, the bolt holes must be aligned first, and then the segments are connected with bolts. When the diameter of the tunnel to be inspected is large, more segments need to be added, resulting in more segments that need to be bolted. Each segment needs to be aligned with holes and bolted, which greatly increases the workload of the connection. Utility Model Content

[0006] The purpose of the utility model is to provide an over-support pre-adjustment mechanism for a full-scale adaptive loading device for a shield segment, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A transition support pre-adjustment mechanism for a full-scale adaptive loading device for shield segments, comprising a head-end connector and a tail-end connector, with multiple groups of standard segments of the same size and non-standard segments of different sizes arranged between the two for varying the spacing between the two; the standard segments and the non-standard segments are alternately connected;

[0009] Connecting posts are fixedly mounted on both ends of the standard segment in the length direction, and connecting sleeves that can slide with the connecting posts are fixedly mounted on both ends of the non-standard segment in the length direction; a yielding structure is provided on the connecting sleeve, and a limiting block is connected to the yielding structure. During the docking process between the connecting post and the connecting sleeve, the connecting post can drive the yielding structure to move through the limiting block, and after the docking is completed, the yielding structure can limit the connecting post through the limiting block.

[0010] A locking structure is also provided on the connecting sleeve, and a support plate is connected to the locking structure. The locking structure can limit the rotation direction of the support plate.

[0011] The transition support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments as described above: a plurality of guide protrusions are fixedly mounted on the connecting sleeve, a plurality of guide grooves for slidingly engaging with the guide protrusions are provided on the connecting column, and an engaging groove for engaging with the limit block is provided in the guide groove.

[0012] The excessive support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments as described above: the said giving way structure includes a plurality of groups of giving way grooves provided on the said connecting sleeve, a fixed block is fixedly installed in the said giving way groove, a slider fixedly connected to the said limit block is slidably installed on the said giving way groove, a spring fixedly connected to the said fixed block is fixedly installed on the said limit block, and a resistance protrusion is fixedly installed on the end of the slider away from the limit block.

[0013] The excessive support pre-adjustment mechanism of the full-scale adaptive loading device of the shield segment as described above: the locking structure includes a connecting block fixedly mounted on the connecting sleeve; a hinged rod is fixedly mounted on the connecting block, a connecting rod fixedly connected to the support plate is rotatably mounted on the hinged rod, and a thorn tooth groove surrounding the hinged rod is fixedly mounted on the connecting rod; a sliding sleeve is slidably engaged on the hinged rod, and a ratchet cooperating with the thorn tooth groove is rotatably mounted on the sliding sleeve.

[0014] The excessive support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments as described above: a trigger ring capable of cooperating with the interference protrusion is slidably mounted on the connecting sleeve, a cooperating block is fixedly mounted on the sliding sleeve, and a trigger plate cooperating with the cooperating block is fixedly mounted on the trigger ring.

[0015] The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device as described above: the surface where the mating block and the trigger plate cooperate is an inclined surface; the inclination direction is toward the sliding sleeve; the surface where the interference protrusion and the trigger ring cooperate is a slope surface.

[0016] The transition support pre-adjustment mechanism of the shield segment full-scale adaptive loading device as described above: a limiting block that limits the rotation angle of the connecting rod is provided on the connecting block.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the docking is completed by insertion, which can make the installation process simple and can greatly save installation time; the workload of connection is reduced; the rotation direction of the support plate is limited by the locking structure, so that the support plate has the ability to support and guide, thereby reducing the difficulty of installation; the yield structure can limit the connecting column that has completed the docking through the limit block, thereby improving the quality of docking and the reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of the transition support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments.

[0019] Figure 2 This is a structural schematic diagram from another perspective of the excessive support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments.

[0020] Figure 3 This is a structural schematic diagram of the standard segments and non-standard segments in the transition support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments.

[0021] Figure 4 for Figure 3 Schematic diagram of the structure from a cross-sectional perspective.

[0022] Figure 5 for Figure 4 Schematic diagram of the structure at point A.

[0023] Figure 6 This is a structural diagram of the support plate, connecting rod and hinged rod in the transition support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments.

[0024] Figure 7 This is a structural diagram of the trigger ring and trigger plate in the transition support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments.

[0025] Figure 8 for Figure 7 Schematic diagram of the structure at point B.

[0026] Figure 9This is a structural schematic diagram of the non-standard segment in the transition support pre-adjustment mechanism of the full-scale adaptive loading device for shield segments.

[0027] Figure 10 for Figure 9 Schematic diagram of the structure at point C in the middle.

[0028] In the figure: 1. Head end connector;

[0029] 2. End connector;

[0030] 3. Standard segment; 301. Connecting column; 302. Guide groove; 303. Fitting groove

[0031] 4. Non-standard segment; 401. Connecting sleeve; 402. Guide protrusion; 403. Clearance groove;

[0032] 5. Support plate;

[0033] 6. Connecting rod; 601. Thorn tooth groove;

[0034] 7. Articulated rod;

[0035] 8. Sliding sleeve; 801. Ratchet; 802. Matching block;

[0036] 9. Slider; 901. Limit block; 902. Interference protrusion;

[0037] 10. Fixed block;

[0038] 11. Spring;

[0039] 12. Trigger ring; 1201. Trigger plate;

[0040] 13. Connecting block; 1301. Restriction block. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] See also Figures 1 to 10 As an embodiment of the present invention, the over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device includes a head-end connector 1 and a tail-end connector 2, between which are arranged multiple groups of standard segments 3 of the same size and non-standard segments 4 of different sizes for changing the spacing between the two; the standard segments 3 and the non-standard segments 4 are alternately connected;

[0043] Connecting posts 301 are fixedly mounted on both ends of the length direction of the standard segment 3, and connecting sleeves 401 that can slide with the connecting posts 301 are fixedly mounted on both ends of the length direction of the non-standard segment 4; a yielding structure is provided on the connecting sleeve 401, and a limiting block 901 is connected to the yielding structure. During the docking process between the connecting post 301 and the connecting sleeve 401, the connecting post 301 can drive the yielding structure to move through the limiting block 901, and after the docking is completed, the yielding structure can limit the connecting post 301 through the limiting block 901.

[0044] The connecting sleeve 401 is further provided with a locking structure, to which the support plate 5 is connected, and the locking structure can limit the rotation direction of the support plate 5 .

[0045] In this embodiment, the standard segment 3 and the non-standard segment 4 are reasonably selected and matched according to the radius of the shield segment ring that needs to be detected before use; the sizes of the head end connector 1 and the end connector 2 are fixed, and the connection methods between the head end connector 1 and the non-standard segment 4, the end connector 2 and the non-standard segment 4, and the standard segment 3 and the non-standard segment 4 are all the same; when in use, the head end connector 1 is installed on the adaptive loading device, and then the selected standard segment 3 and non-standard segment 4 are alternately connected to the head end connector 1, and finally, the end connector 2 is connected, and the end connector 2 is connected to the annular reaction wall through the embedded part structure set inside the annular reaction wall to provide reaction force for the loading process.

[0046] Before the standard segment 3 is connected with the non-standard segment 4, the support plate 5 is rotated to reduce the angle between the support plate 5 and the outer surface of the non-standard segment 4; until it is rotated to a position coplanar with the outer surface of the standard segment 3, and due to the action of the locking structure, the support plate 5 cannot be rotated in the direction of increasing the angle between the support plate 5 and the outer surface of the non-standard segment 4; during docking, the outer surface of the standard segment 3 is fully contacted with the support plate 5, and the standard segment 3 is pushed to cause sliding friction with the support plate 5, so that the connecting column 301 can gradually enter the connecting sleeve 401; during the docking process, the locking structure limits the rotation direction of the support plate 5, so that the support plate 5 can support the standard segment 3, and docking can be carried out more easily; and since multiple groups of support plates 5 support the standard segment 3 from multiple angles, they can provide guidance for the docking process, so that the axes of the standard segment 3 and the non-standard segment 4 are basically colinear, which is beneficial to the safety of subsequent inspections.

[0047] As the connecting column 301 slides inward in the connecting sleeve 401, the connecting column 301 will contact the limit block 901 and drive the yield structure to move through the limit block 901, so that the connecting column 301 can fully enter the connecting sleeve 401; and when the connecting column 301 fully enters the connecting sleeve 401, the yield structure will move and limit the connecting column 301 through the limit block 901 to prevent the connecting column 301 from separating from the connecting sleeve 401, thereby improving the reliability of the connection.

[0048] Completing the docking by insertion can simplify the installation process and greatly save installation time; the locking structure is used to limit the rotation direction of the support plate 5, so that the support plate 5 has the ability to support and guide, thereby reducing the difficulty of installation; the yielding structure can limit the connection column 301 that has completed the docking through the limit block 901, thereby improving the quality of the docking and the reliability of the connection.

[0049] As a further solution of the present invention, multiple sets of guide protrusions 402 are fixedly installed on the connecting sleeve 401, and multiple sets of guide grooves 302 that slide with the guide protrusions 402 are provided on the connecting column 301. The guide grooves 302 are provided with engaging grooves 303 that cooperate with the limit blocks 901.

[0050] In this embodiment, when the connecting column 301 enters the connecting sleeve 401, the guide protrusion 402 will enter the guide groove 302; when sliding friction occurs between the connecting column 301 and the connecting sleeve 401, the guide protrusion 402 will slide in the guide groove 302; and after the connecting column 301 completely enters the connecting sleeve 401, the limit block 901 will cooperate with the interlocking groove 303 to limit the connecting column 301; the setting of the guide protrusion 402 and the guide groove 302 makes the axes of the connecting column 301 and the connecting sleeve 401 more collinear, thereby improving the safety of subsequent load application.

[0051] As a further solution of the present invention, the give-way structure includes multiple groups of give-way grooves 403 opened on the connecting sleeve 401, a fixed block 10 is fixedly installed in the give-way groove 403, a slider 9 fixedly connected to the limit block 901 is slidably installed on the give-way groove 403, a spring 11 fixedly connected to the fixed block 10 is fixedly installed on the limit block 901, and a resistance protrusion 902 is fixedly installed on the end of the slider 9 away from the limit block 901.

[0052] In this embodiment, one surface of the limiting block 901 close to the outer side of the connecting sleeve 401 is an inclined surface; the other surface thereof is a flat surface perpendicular to the connecting sleeve 401 .

[0053] When the connecting column 301 slides inward in the connecting sleeve 401, it will contact the limit block 901 and squeeze the inclined surface of the limit block 901, so that the limit block 901 drives the slider 9 to slide in the yield groove 403 toward the outer surface of the connecting sleeve 401. At this time, the limit block 901 will approach the fixed block 10, thereby compressing the spring 11; after the connecting column 301 completely enters the connecting sleeve 401, under the action of the elastic force of the spring 11, the limit block 901 will drive the slider 9 to slide toward the connecting column 301 and enter the interlocking groove 303. At this time, the flat surface will conflict with the groove wall of the interlocking groove 303, thereby limiting the connecting column 301 to prevent the connecting column 301 from separating from the connecting sleeve 401, thereby improving the reliability of the connection.

[0054] During the sliding process of the limit block 901 , the slider 9 drives the abutment protrusion 902 to slide synchronously.

[0055] As a further solution of the present invention, the locking structure includes a connecting block 13 fixedly mounted on the connecting sleeve 401; a hinged rod 7 is fixedly mounted on the connecting block 13, a connecting rod 6 fixedly connected to the support plate 5 is rotatably mounted on the hinged rod 7, and a thorn tooth groove 601 surrounding the hinged rod 7 is fixedly mounted on the connecting rod 6; a sliding sleeve 8 is slidably engaged on the hinged rod 7, and a ratchet 801 cooperating with the thorn tooth groove 601 is rotatably mounted on the sliding sleeve 8.

[0056] In this embodiment, before the standard segment 3 is connected to the non-standard segment 4, the support plate 5 is rotated by rotating the connecting rod 6, so that the angle between the connecting rod 6 and the outer surface of the non-standard segment 4 becomes smaller; until the support plate 5 is rotated to a position coplanar with the outer surface of the standard segment 3.

[0057] The ratchet 801 is provided with a torsion spring; during the rotation process, the ratchet tooth groove 601 will mesh with the ratchet tooth 801, so that the connecting rod 6 can smoothly drive the support plate 5 to rotate in the direction of the standard segment 3; at the same time, due to the limiting effect of the ratchet tooth 801 on the ratchet tooth groove 601, the connecting rod 6 cannot drive the support plate 5 to rotate in the direction away from the standard segment 3; thus, the support plate 5 has the function of supporting the standard segment 3; during docking, the outer surface of the standard segment 3 is fully contacted with the support plate 5, and the standard segment 3 is pushed to cause sliding friction with the support plate 5 so that the connecting column 301 can gradually enter the connecting sleeve 401; during the docking process, the locking structure limits the rotation direction of the support plate 5, so that the support plate 5 can support the standard segment 3, and docking can be carried out more easily; and since multiple groups of support plates 5 support the standard segment 3 from multiple angles, it can provide guidance for the docking process, so that the axes of the standard segment 3 and the non-standard segment 4 are basically collinear, which is beneficial to the safety of subsequent inspections.

[0058] As a further solution of the present invention, a trigger ring 12 that can cooperate with the interference protrusion 902 is slidably installed on the connecting sleeve 401, a matching block 802 is fixedly installed on the sliding sleeve 8, and a trigger plate 1201 that cooperates with the matching block 802 is fixedly installed on the trigger ring 12.

[0059] In this embodiment, when the standard segment 3 and the non-standard segment 4 need to be disassembled, the trigger ring 12 can be pushed to make the trigger ring 12 cooperate with the interference protrusion 902. Since the interference protrusion 902 and the trigger ring 12 are inclined inwardly, and the inclined direction is toward the slider 9, the trigger ring 12 can push the interference protrusion 902 to slide in the outer direction away from the fixed block 10, thereby driving the limit block 901 to separate from the fitting groove 303 through the slider 9, thereby releasing the limit on the connecting column 301, so that the connecting column 301 can slide freely in the connecting sleeve 401; at the same time, when the trigger ring 12 is pushed, the trigger plate 12 is driven 01 slides synchronously toward the resisting protrusion 902. During the sliding process, the trigger plate 1201 cooperates with the matching block 802 to drive the sliding sleeve 8 to slide in the direction away from the connecting rod 6 by squeezing the matching block 802, thereby driving the ratchet 801 to disengage from the thorn tooth groove 601. Since the ratchet 801 loses the limiting effect of the thorn tooth groove 601, the connecting rod 6 can rotate freely on the hinge rod 7, so that the connecting rod 6 can drive the support plate 5 to rotate in the direction away from the standard segment 3, so as to reduce the contact area between the non-standard segment 4 and the standard segment 3, thereby making it easier to separate the standard segment 3 from the non-standard segment 4.

[0060] As a further solution of the present invention, the surface where the matching block 802 matches the trigger plate 1201 is an inclined surface; the inclined direction is toward the sliding sleeve 8; and the surface where the interference protrusion 902 matches the trigger ring 12 is a slope.

[0061] In this embodiment, the distance between the inclined surface of the mating block 802 and the sliding sleeve 8 decreases as it approaches the connecting rod 6. This allows the trigger plate 1201 to change the direction of the squeezing force through the inclined surface when squeezing the mating block 802, so that the sliding sleeve 8 can drive the ratchet teeth 801 to disengage from the ratchet tooth groove 601.

[0062] The characteristic of the slope of the interference protrusion 902 can change the squeezing force of the trigger ring 12 into a force that drives the interference protrusion 902 to slide away from the fixing block 10 .

[0063] As a further solution of the present invention, a limiting block 1301 for limiting the rotation angle of the connecting rod 6 is provided on the connecting block 13 .

[0064] In this embodiment, the limiting block 1301 can limit the rotation angle of the connecting rod 6, so that the connecting rod 6 drives the support plate 5 to rotate toward the standard segment 3 and the angle is limited. When the connecting rod 6 is at the maximum rotation angle, the support plate 5 just completely contacts the outer surface of the standard segment 3.

[0065] The above embodiments are exemplary rather than restrictive, so any technical solution of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention is included in the present invention.

Claims

1. A transition support pre-adjustment mechanism for a full-scale adaptive loading device for a shield segment, comprising a head end connector (1) and a tail end connector (2), with multiple groups of standard segments (3) of the same size and non-standard segments (4) of different sizes arranged between the head end and the tail end for changing the spacing between the head end and the tail end; the standard segments (3) and the non-standard segments (4) are alternately connected; It is characterized by: Connecting posts (301) are fixedly mounted on both ends of the length direction of the standard segment (3), and connecting sleeves (401) that can slide with the connecting posts (301) are fixedly mounted on both ends of the length direction of the non-standard segment (4); a yielding structure is provided on the connecting sleeve (401), and a limiting block (901) is connected to the yielding structure. During the docking process between the connecting post (301) and the connecting sleeve (401), the connecting post (301) can drive the yielding structure to move through the limiting block (901), and after the docking is completed, the yielding structure can limit the connecting post (301) through the limiting block (901); A locking structure is also provided on the connecting sleeve (401), a support plate (5) is connected to the locking structure, and the locking structure can limit the rotation direction of the support plate (5).

2. The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device according to claim 1 is characterized in that: The connecting sleeve (401) is fixedly mounted with a plurality of guide protrusions (402), the connecting column (301) is provided with a plurality of guide grooves (302) that are slidably matched with the guide protrusions (402), and the guide grooves (302) are provided with engaging grooves (303) that are matched with the limit blocks (901).

3. The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device according to claim 2 is characterized in that: The yielding structure comprises a plurality of yielding grooves (403) provided on the connecting sleeve (401), a fixed block (10) being fixedly installed in the yielding grooves (403), a slider (9) fixedly connected to the limiting block (901) being slidably installed on the yielding grooves (403), a spring (11) fixedly connected to the fixing block (10) being fixedly installed on the limiting block (901), and a resisting protrusion (902) being fixedly installed on one end of the slider (9) away from the limiting block (901).

4. The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device according to claim 3 is characterized in that: The locking structure comprises a connecting block (13) fixedly mounted on the connecting sleeve (401); a hinged rod (7) fixedly mounted on the connecting block (13); a connecting rod (6) fixedly connected to the support plate (5) rotatably mounted on the hinged rod (7); a thorn tooth groove (601) surrounding the hinged rod (7) fixedly mounted on the connecting rod (6); a sliding sleeve (8) slidably engaged on the hinged rod (7); a ratchet (801) cooperating with the thorn tooth groove (601) rotatably mounted on the sliding sleeve (8).

5. The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device according to claim 4 is characterized in that: A trigger ring (12) capable of cooperating with the interference protrusion (902) is slidably mounted on the connecting sleeve (401), a cooperating block (802) is fixedly mounted on the sliding sleeve (8), and a trigger plate (1201) cooperating with the cooperating block (802) is fixedly mounted on the trigger ring (12).

6. The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device according to claim 5 is characterized in that: The surface where the matching block (802) matches the trigger plate (1201) is an inclined surface; the inclination direction is toward the sliding sleeve (8); and the surface where the abutting protrusion (902) matches the trigger ring (12) is a sloped surface.

7. The over-support pre-adjustment mechanism of the shield segment full-scale adaptive loading device according to claim 6 is characterized in that: The connecting block (13) is provided with a limiting block (1301) for limiting the rotation angle of the connecting rod (6).

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