Shield tunnel segment lining structure joint local prototype loading test support

Abstract

The utility model provides a shield tunnel segmental lining structure joint local prototype loading test support, which relates to the technical field of civil engineering, and is characterized by comprising a fixed base, a movable support, a rotary connecting device and a limiting device. The fixed base is fixedly arranged on the counter-force device; the movable support is hinged to the fixed base through a rotary connecting device; the limiting device is fixedly arranged at the end, away from the fixed base, of the movable support, and the limiting device and the end face of the movable support form a groove used for containing a shield segment test component. Tangential constraint between the shield segment test component and the supporting plate is provided through friction force and mechanical occlusal force of the limiting device and the movable support, and tangential sliding between the shield segment test component and the supporting plate can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a local prototype loading test support for a shield tunnel segment lining structure joint. Background Art

[0002] In recent years, with the rapid development of tunnels and underground engineering in my country, shield tunnel construction has been widely used. The shield tunnel lining segment is a key component in the shield tunnel, and its mechanical properties are crucial to the quality and safety of the tunnel. Therefore, the study of the stress and failure characteristics of the shield segment is particularly important. At present, the most direct and effective way to determine the mechanical properties of the shield segment structure is to conduct a structural loading test. Among the existing movable hinge supports used for shield segment structure loading tests, they are divided into U-shaped movable hinge supports and flat-plate movable hinge supports according to the structural differences in the contact position with the segment. The U-shaped movable hinge support can effectively fix the segment test component on the support, but this type of support lacks flexibility and has poor adaptability to segment test components of different thicknesses and diameters; the flat-plate movable hinge support can be used for loading tests of segment test components of various thicknesses and diameters, but this type of support cannot provide sufficient tangential constraints parallel to the contact surface.

[0003] Based on the above shortcomings of the prior art, a local prototype loading test support for the joint of the shield tunnel segment lining structure is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide a local prototype loading test support for the joint of the shield tunnel segment lining structure to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] The present application provides a local prototype loading test support for the joint of the shield tunnel segment lining structure, characterized in that it includes: a fixed base, a movable support, a rotating connection device and a limiting device. The fixed base is fixedly arranged on the reaction device; the movable support is hingedly connected to the fixed base through the rotating connection device; the limiting device is fixedly arranged on the end of the movable support away from the fixed base, and the limiting device and the end surface of the movable support form a groove for accommodating the shield segment test component.

[0006] Furthermore, the fixed base includes a first bottom plate, a second bottom plate and a base rib plate, the first bottom plate and the second bottom plate are arranged perpendicular to each other, the first bottom plate and the second bottom plate are respectively fixedly connected to two mutually perpendicular mounting surfaces of the reaction force device, and the base rib plate is respectively fixedly connected to the first bottom plate and the second bottom plate.

[0007] Furthermore, the first bottom plate and the second bottom plate are both provided with through holes that match with the mounting screw holes on the reaction force device, and the first bottom plate and the second bottom plate are fixedly connected to the reaction force device by bolts.

[0008] Furthermore, the movable support includes a supporting panel and a supporting rib plate which are fixedly connected to each other, the supporting rib plate is provided with a first circular hole, the base rib plate is provided with a second circular hole, the diameter of the first circular hole is the same as the diameter of the second circular hole and cooperates with the rotating connection device, and the base rib plate and the supporting rib plate are rotatably connected through the rotating connection device.

[0009] Furthermore, the rotating connection device is a rotating shaft.

[0010] Furthermore, the supporting ribs are of an asymmetric shape.

[0011] Furthermore, the number of the base ribs is six, the number of the supporting ribs is three, all the base ribs and the supporting ribs are arranged in parallel, the six base ribs are evenly divided into three groups, and the gap between two base ribs in each group is greater than the width of the supporting ribs.

[0012] Furthermore, the limiting device comprises two limiting rods, the two limiting devices are arranged in parallel at two ends of the supporting panel, and the two limiting rods are fixedly connected to the supporting panel.

[0013] Furthermore, a boss is provided on one end of the limiting rod that contacts the supporting panel, and a groove that cooperates with the boss is provided on the supporting panel.

[0014] Furthermore, the boss is provided with at least two through holes along the center line, the groove is provided with screw holes matching with the through holes, and the limiting rod is fixedly connected to the supporting panel by bolts.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides tangential constraints between the shield segment test component and the support plate through the friction force and mechanical bite force of the limit device and the movable support, which can effectively prevent tangential sliding between the shield segment test component and the support plate; for segment lining test components of different thicknesses and diameters, the utility model only needs to use limit rods of different widths to achieve effective constraints on the test components, is simple and convenient to install, does not require too many additional components, and has the advantages of small size, detachability, low cost, etc.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the embodiments of the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a local prototype loading test support for a shield tunnel segment lining structure joint described in an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the structure of the fixed base described in the embodiment of the present application;

[0021] Figure 3 It is a structural schematic diagram of the movable support described in the embodiment of the present application;

[0022] Figure 4 It is a schematic structural diagram of the rotating shaft described in the embodiment of the present application;

[0023] Figure 5 Schematic diagram of the structure of the limit rod described in the embodiment of the present application.

[0024] Markings in the figure: 1. fixed base; 11. first base plate; 12. second base plate; 13. base rib; 2. movable support; 21. support panel; 22. support rib; 3. rotating connection device; 31. rotating shaft; 4. limiting device; 41. limiting rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] like Figure 1As shown, this embodiment provides a local prototype loading test support for the joint of the shield tunnel segment lining structure, which is used to simulate the complex loads that the shield segment bears in actual underground engineering under laboratory conditions, so as to test the mechanical properties of the segment. The support consists of several key parts: a fixed base 1, which is directly fixedly connected to the reaction device, which is a stable structure that provides reverse force in the test and is used to withstand the reaction force generated by the segment lining structure on the support during the loading process. The design of the fixed base 1 ensures the stability and reliability of the entire test support system. Next is the movable support 2, which is hingedly connected to the fixed base 1 through a rotating connection device 3, allowing the movable support 2 to rotate within a certain range to adapt to the deformation of the shield segment during the loading process. The rotating connection device 3 is a key component for realizing the hinge between the fixed base 1 and the movable support 2, which ensures that the support can rotate flexibly while maintaining the integrity of the structure. The limit device 4 is fixedly set on the movable support 2, away from the end of the fixed base 1. The limit device 4 and the end face of the movable support 2 together form a groove, which is specially designed to accommodate the shield segment test component. The function of the limit device 4 is to impose tangential constraints on the segment during the test to prevent the segment from sliding under the action of load, thereby ensuring the accuracy and repeatability of the test data. Through the close contact and mechanical engagement between the device and the movable support 2, as well as the friction and mechanical engagement force between them, the tangential sliding between the segment test component and the support plate can be effectively limited. Combining the above designs, the test support provided in the present application can not only adapt to shield segment test components of different sizes, but also is easy to install, has the advantages of small size, detachability, low cost, etc., which greatly improves the efficiency and accuracy of the loading test of the shield segment lining structure.

[0028] Preferably, if Figure 2 As shown, the fixed base 1 is composed of two mutually perpendicular bottom plates, namely the first bottom plate 11 and the second bottom plate 12. This design enables the fixed base 1 to be stably positioned in space and can match the corresponding mounting surface of the reaction device. The first bottom plate 11 and the second bottom plate 12 are respectively fixedly connected to the two mutually perpendicular mounting surfaces of the reaction device. This connection method ensures a firm combination between the fixed base 1 and the reaction device, and ensures that the reaction device can reliably withstand the reaction force transmitted by the segment test member during the loading test. In addition to the bottom plate, the fixed base 1 also includes a base rib 13. The rib is a longitudinal or transverse strip used to increase the strength and rigidity of the structural member. Here, the base rib 13 is fixedly connected to the first bottom plate 11 and the second bottom plate 12, which enhances the structural stability of the fixed base 1 and provides a support point for other parts of the support. Through such a design, the fixed base 1 not only provides a solid foundation so that the support can be reliably connected to the reaction device, but also enhances the stability and durability of the entire support structure, and improves the safety and accuracy of the loading test.

[0029] Preferably, the first bottom plate 11 and the second bottom plate 12 are both provided with through holes that match the mounting screw holes on the reaction device, and the first bottom plate 11 and the second bottom plate 12 are fixedly connected to the reaction device by bolts. By using bolts, the first bottom plate 11 and the second bottom plate 12 are fixedly connected to the reaction device. Bolts are a commonly used fastener that can provide strong clamping force and good stability, and are suitable for applications that need to withstand large loads and torques.

[0030] Preferably, if Figure 3 As shown, the movable support 2 includes a support panel 21 and a support rib 22 that are fixedly connected to each other. The movable support 2 is composed of a support panel 21 and a support rib 22 that are fixedly connected to each other. The support panel 21 generally refers to the planar structure on the upper part of the support, which is used to directly contact and support the shield segment test component, and the support rib 22 is used to strengthen the structural strength of the support panel 21. A first circular hole is provided on the support rib 22, and a second circular hole is provided on the base rib 13. The diameter of the first circular hole is the same as the diameter of the second circular hole and cooperates with the rotating connection device 3. The rotating connection device 3 passes through the corresponding circular holes on the support rib 22 and the base rib 13, allowing the movable support 2 to rotate freely within a certain range to adapt to the deformation that may occur in the shield segment test component during loading. Through the rotational connection between the base rib 13 and the support rib 22, the support can simulate various stress conditions that the shield segment may encounter in the actual underground environment. This design also ensures that the load applied to the shield segment during the test can more accurately simulate the actual working conditions.

[0031] Preferably, if Figure 4 As shown, the rotation connection device 3 is a rotation shaft 31. Using the rotation shaft 31 as the rotation connection device 3 provides a simple and effective mechanism to achieve the rotational freedom of the movable support 2. It not only simplifies the design of the support, but also may reduce the cost of manufacturing and maintenance.

[0032] Preferably, if Figure 3 As shown, the support ribs 22 are asymmetrical in shape. The asymmetrical support ribs 22 can reduce the mutual interference between the ribs, thereby allowing the movable support 2 to achieve a larger angle of rotation on the fixed base 1.

[0033] Preferably, the number of the base ribs 13 is six, the number of the supporting ribs 22 is three, all the base ribs 13 and the supporting ribs 22 are arranged in parallel, the six base ribs 13 are evenly divided into three groups, and the gap between the two base ribs 13 in each group is greater than the width of the supporting rib 22. This rib layout takes into account the mechanical properties and stability of the support. By reasonably distributing the ribs, the load-bearing capacity and anti-deformation capacity of the support can be optimized, thereby improving the reliability of the entire test support.

[0034] Preferably, if Figure 5 As shown, the limit device 4 includes two limit rods 41, which are arranged in parallel at both ends of the support panel 21, and the two limit rods 41 are fixedly connected to the support panel 21. By using limit rods 41 of different widths, the limit device 4 can adapt to segment test components of different sizes, including segments of different thicknesses and diameters. This design provides extremely high adaptability, so that the same test support can be used for segment tests of various specifications. At the same time, the process of replacing the limit rods 41 is simple and convenient, and does not require complicated steps or additional components, which simplifies the test preparation work and improves the efficiency of the test.

[0035] Preferably, a boss is provided on one end of the limiting rod 41 that contacts the support panel 21, and a groove that matches the boss is provided on the support panel 21. The matching of the groove and the boss can provide precise positioning, ensure the correct installation of the limiting rod 41 on the support panel 21, and simplify the installation and maintenance process.

[0036] Preferably, the boss is provided with at least two through holes along the center line, the groove is provided with screw holes matching with the through holes, the bolts pass through the through holes of the boss and the screw holes of the groove, and then are tightened to ensure that the limiting rod 41 will not loosen.

[0037] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0038] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A local prototype loading test support for the joint of a shield tunnel segment lining structure, characterized in that: include: A fixed base (1), wherein the fixed base (1) is fixedly arranged on the reaction force device; A movable support (2), the movable support (2) being hingedly connected to the fixed base (1) via a rotating connection device (3); and A limiting device (4), wherein the limiting device (4) is fixedly arranged on the end of the movable support (2) away from the fixed base (1), and the limiting device (4) and the end surface of the movable support (2) form a groove for accommodating a shield segment test component.

2. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 1 is characterized by: The fixed base (1) comprises a first base plate (11), a second base plate (12) and a base rib plate (13); the first base plate (11) and the second base plate (12) are arranged perpendicular to each other; the first base plate (11) and the second base plate (12) are respectively fixedly connected to two mutually perpendicular mounting surfaces of the reaction force device; and the base rib plate (13) is respectively fixedly connected to the first base plate (11) and the second base plate (12).

3. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 2 is characterized by: The first base plate (11) and the second base plate (12) are both provided with through holes that match the mounting screw holes on the reaction force device, and the first base plate (11) and the second base plate (12) are fixedly connected to the reaction force device by bolts.

4. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 2 is characterized by: The movable support (2) comprises a supporting panel (21) and a supporting rib (22) which are fixedly connected to each other, the supporting rib (22) is provided with a first circular hole, and the base rib (13) is provided with a second circular hole, the diameter of the first circular hole is the same as the diameter of the second circular hole and cooperates with the rotating connection device (3), and the base rib (13) and the supporting rib (22) are rotatably connected via the rotating connection device (3).

5. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 4 is characterized by: The rotating connection device (3) is a rotating shaft (31).

6. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 4 is characterized by: The supporting rib (22) is of an asymmetrical shape.

7. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 4 is characterized by: The number of the base ribs (13) is six, the number of the support ribs (22) is three, all the base ribs (13) and the support ribs (22) are arranged in parallel, the six base ribs (13) are evenly divided into three groups, and the gap between the two base ribs (13) in each group is greater than the width of the support rib (22).

8. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 4 is characterized by: The limiting device (4) comprises two limiting rods (41), the two limiting devices (4) are arranged in parallel at two ends of the supporting panel (21), and the two limiting rods (41) are fixedly connected to the supporting panel (21).

9. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 8, characterized in that: A boss is provided on one end of the limiting rod (41) that contacts the supporting panel (21), and a groove that cooperates with the boss is provided on the supporting panel (21).

10. The local prototype loading test support for the shield tunnel segment lining structure joint according to claim 9, characterized in that: The boss is provided with at least two through holes along the center line, the groove is provided with screw holes matching the through holes, and the limiting rod (41) is fixedly connected to the supporting panel (21) by means of bolts.

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