I-shaped steel connecting joint for tunnel supporting and connecting method

Abstract

The invention discloses an I-shaped steel connecting joint for tunnel supporting and a connecting method and relates to the technical field of tunnel supporting. The connecting node comprises a first connecting plate and a second connecting plate, a tooth groove and a limiting edge groove surrounding the tooth groove are formed in the connecting face of the connecting plate, a connecting table with a connecting hole is arranged on the other corresponding face of the connecting plate, and positioning of the connecting plate is achieved through meshing of the tooth groove and mutual abutting of the limiting edge groove. After locking of the safety pin is relieved, the connecting rod in the first connecting table of the first connecting plate is inserted into the connecting hole of the second connecting table of the second connecting plate, and the connecting plates are anchored into a whole by clamping the inner blocks in the connecting tables into the grooves of the connecting rod. Precision and structural strength of node connection are improved, a large amount of on-site bolt anchoring operation needed by a traditional node is avoided, the construction technology is effectively simplified, and construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel support structures, specifically to an I-beam connection node and connection method for tunnel support. Background Technology

[0002] After the tunnel is excavated, a large number of I-beam arch frames are used as the support structure. The prefabricated I-beam arch frame units are transported to the installation position and positioned on the construction site. After the connecting plates at the ends of adjacent arch frame units are aligned, high-strength bolts are used to pass through the reserved holes on the connecting plates and then initially tightened. Then, a torque wrench is used to finally tighten the bolts according to the design requirements to achieve the specified pre-tightening force to ensure the node stiffness. After the connection is completed, the overall position and shape of the arch frame need to be re-measured to ensure that they share the force and form a complete support system.

[0003] Existing I-beam connection nodes have many problems: misalignment between steel connecting plates makes it difficult to ensure splicing accuracy; the extensive use of bolts between I-beams leads to low construction efficiency and can easily cause construction accidents due to loose bolts, affecting the safety of construction personnel. Therefore, an I-beam connection node and connection method for tunnel support is proposed. Summary of the Invention

[0004] The present invention proposes an I-beam connection node and connection method for tunnel support, in order to solve the problems of poor accuracy and low construction efficiency of existing tunnel support connection nodes.

[0005] The present invention provides a tunnel support I-beam connection node and connection method, which adopts the following technical solution:

[0006] A connecting node for tunnel support using I-beams, characterized in that it comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate having contacting surfaces and opposing back surfaces; the contact surface of the first connecting plate is provided with a first toothed groove and a first limiting side groove; the back surface of the first connecting plate is provided with a first connecting platform; the first connecting plate has a first connecting hole penetrating itself and the first connecting platform; the first connecting platform is provided with a movable connecting rod, a prefabricated pin, a prefabricated pin hole and a first blocking block; the connecting rod is provided with a connecting rod hole, a first locking groove and a second locking groove; the contact surface of the second connecting plate is provided with a second toothed groove and a second limiting side groove; the back surface of the second connecting plate is provided with a second connecting platform; the second connecting plate has a second connecting hole penetrating itself and the second connecting platform; the second connecting platform is provided with a second blocking block; the size of the second connecting hole is the same as the size of the first connecting hole;

[0007] The prefabricated pin passes through the prefabricated pin hole and the connecting rod hole, temporarily locking the connecting rod in the first connecting hole; when the first connecting plate and the second connecting plate are connected, the first tooth groove meshes with the second tooth groove, the first limiting side groove abuts and aligns with the second limiting side groove, and the center of the first connecting hole and the center of the second connecting hole are aligned; the connecting rod passes through the first connecting hole and the second connecting hole, the first blocking block is engaged with the first locking groove, and the second blocking block is engaged with the second locking groove.

[0008] Furthermore, the first connecting plate includes at least four first connecting platforms; the first connecting platforms are symmetrically arranged along the first connecting plate; the second connecting plate includes at least four second connecting platforms; the second connecting platforms are symmetrically arranged along the second connecting plate.

[0009] Furthermore, the first connecting platform also includes a first connecting groove, a first bolt, a first bolt hole, a first connecting block, and a first spring; the first connecting block, the first spring, and the first blocking block are all housed in the first connecting groove, and the two ends of the first spring are respectively fixedly connected to the first connecting block and the first blocking block; a first fixing hole is provided on the first connecting block, and the first bolt passes through the first bolt hole and the first fixing hole to fix the first connecting block in the first connecting groove;

[0010] The second connecting platform further includes a second connecting groove, a second bolt, a second bolt hole, a second connecting block, and a second spring. The second connecting block, the second spring, and the second blocking block are all housed inside the second connecting groove. The two ends of the second spring are respectively fixedly connected to the second connecting block and the second blocking block. The second connecting block is provided with a second fixing hole. The second bolt passes through the second bolt hole and the second fixing hole to fix the second connecting block in the second connecting groove.

[0011] Furthermore, the first locking groove, the second locking groove, the first connecting groove, the first bolt, the first bolt hole, the first connecting block, the first spring, and the first blocking block are all symmetrically arranged along the axis of the first connecting hole; the second connecting groove, the second bolt, the second bolt hole, the second connecting block, the second spring, and the second blocking block are all symmetrically arranged along the axis of the second connecting hole.

[0012] Furthermore, the first and second blocks are trapezoidal bodies, and the first and second blocks are arranged in opposite directions. The first spring acts on the first block, causing the inclined surface of the first block to press against the connecting rod; the second spring acts on the second block, causing the inclined surface of the second block to extend into the second connecting hole.

[0013] Furthermore, the prefabricated pin includes a limiting bracket, a safety rod, and a third spring; the limiting bracket is hinged to the safety rod; the third spring is sleeved on the safety rod, and its two ends are fixed to the limiting bracket; the limiting bracket abuts against the outer surface of the first connecting platform.

[0014] The connection method for I-beam connection nodes used in tunnel support is characterized by comprising the following steps:

[0015] S1: Engage the first tooth groove with the second tooth groove; align the first limiting side groove with the second limiting side groove, and align the center of the first connecting hole with the center of the second connecting hole;

[0016] S2: Press the limiting bracket of the prefabricated pin and pull the safety bar outward to remove the prefabricated pin and release the temporary lock on the connecting rod;

[0017] S3: Push the connecting rod to the second connecting hole, so that the connecting rod moves to a position where the first locking groove is aligned with the first blocking block and the second locking groove is aligned with the second blocking block;

[0018] S4: The first blocking block is engaged in the first locking groove under the action of the first spring, and at the same time the second blocking block is engaged in the second locking groove under the action of the second spring, thus completing the locking.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. This invention significantly improves the connection accuracy and reliability of I-beam connection nodes for tunnels by using the mutual meshing of two connecting upper tooth grooves and the mutual abutment of limiting side grooves.

[0021] 2. By prefabricating the connection structure on the connecting plate, the amount of on-site bolt tightening work is greatly reduced, and construction efficiency is significantly improved. Attached Figure Description

[0022] Figure 1 3D structural diagram of I-beam connection nodes for tunnel support Figure 1 ;

[0023] Figure 2 3D structural diagram of I-beam connection nodes for tunnel support Figure 2 ;

[0024] Figure 3 A schematic diagram of the back face of the first connecting plate of the I-beam connection node for tunnel support;

[0025] Figure 4 A schematic diagram of the first connecting platform structure for the I-beam connection node used in tunnel support;

[0026] Figure 5 A schematic diagram of the internal structure of the first connecting groove of the I-beam connection node for tunnel support;

[0027] Figure 6 A schematic diagram of the second connecting platform structure for the I-beam connection node used in tunnel support;

[0028] Figure 7 A schematic diagram of the internal structure of the second connecting groove of the I-beam connection node for tunnel support;

[0029] Figure 8 A schematic diagram of the connecting rod structure for the I-beam connection node used in tunnel support;

[0030] Figure 9 Schematic diagram of section AA, area B, of the I-beam connection node for tunnel support;

[0031] Figure 10 A schematic diagram of section C of the I-beam connection node for tunnel support;

[0032] Figure 11 A schematic diagram of the prefabricated pin structure for the I-beam connection node used in tunnel support.

[0033] In the diagram: 1. First connecting plate; 2. Second connecting plate; 3. First toothed groove; 4. First limiting side groove; 5. First connecting platform; 6. First connecting hole; 7. Second toothed groove; 8. Second limiting side groove; 9. Second connecting platform; 10. Second connecting hole; 11. Connecting rod; 12. Pre-made pin; 13. Pre-made pin hole; 14. First connecting groove; 15. First bolt; 16. First bolt hole; 17. First connecting block; 18. First spring; 19. First blocking block; 20. Connecting rod hole; 21. First locking groove; 22. Second locking groove; 23. First fixing hole; 24. Second connecting block; 25. Second spring; 26. Second blocking block; 27. Second connecting groove; 28. Second bolt; 29. ​​Second bolt hole; 30. Second fixing hole; 31. Limiting bracket; 32. Safety rod; 33. Third spring. Detailed Implementation

[0034] The invention will be further illustrated below with specific examples.

[0035] like Figure 1 and Figure 2 As shown, the tunnel support I-beam connection node of this embodiment includes a first connecting plate 1, a second connecting plate 2, a connecting surface of the first connecting plate 1 and the second connecting plate 2 that are in contact with each other, and a back surface of opposite sides.

[0036] The first connecting plate 1 is provided with a first toothed groove 3, a first limiting side groove 4, a first connecting platform 5 and a first connecting hole 6; the first toothed groove 3 and the first limiting side groove 4 are located on the connecting surface of the first connecting plate 1, the first connecting platform 5 is located on the back surface of the first connecting plate 1, and the first connecting hole 6 penetrates the first connecting plate 1 and the first connecting platform 5.

[0037] The second connecting plate 2 is provided with a second toothed groove 7, a second limiting side groove 8, a second connecting platform 9, and a second connecting hole 10; the second toothed groove 7 and the second limiting side groove 8 are located on the connecting surface of the second connecting plate 2, the second connecting platform 9 is located on the back surface of the second connecting plate 2, and the second connecting hole 10 penetrates the second connecting plate 2 and the second connecting platform 9; the second connecting hole 10 has the same size as the first connecting hole 6.

[0038] The first connecting plate 1 includes at least four first connecting platforms 5, which are symmetrically arranged along the first connecting plate 1; the second connecting plate 2 includes at least four second connecting platforms 9, which are symmetrically arranged along the second connecting plate 2.

[0039] For further details, please refer to Figures 3 to 10 The first connecting platform 5 is provided with a movable connecting rod 11, a pre-made pin 12, a pre-made pin hole 13, and a first connecting groove 14 symmetrically arranged along the axis of the first connecting hole 6, a first bolt 15, a first bolt hole 16, a first connecting block 17, a first spring 18, and a first blocking block 19; the connecting rod 11 is provided with a connecting rod hole 20 and a first locking groove 21 and a second locking groove 22 symmetrically arranged along the axis of the first connecting hole 6; the two ends of the first spring 18 are fixedly connected to the first connecting block 17 and the first blocking block 19 respectively; the first connecting block 17 is provided with a first fixing hole 23; the first bolt 15 passes through the first bolt hole 16 and the first fixing hole 23 to fix the first connecting block 17 in the first connecting groove 14.

[0040] The second connecting platform 9 is provided with a second connecting block 24, a second spring 25, a second blocking block 26, a second connecting groove 27, a second bolt 28, and a second bolt hole 29, which are symmetrical along the axis of the second connecting hole 10. The two ends of the second spring 25 are fixedly connected to the second connecting block 24 and the second blocking block 26, respectively. The second connecting block 24 is provided with a second fixing hole 30. The second bolt 28 passes through the second bolt hole 29 and the second fixing hole 30 to fix the second connecting block 24 in the second connecting groove 27.

[0041] The prefabricated pin 12 passes through the prefabricated pin hole 13 and the connecting rod hole 20 to temporarily lock the connecting rod 11 in the first connecting hole 6; the first blocking block 19 and the second blocking block 26 are trapezoidal; the first blocking block 19 and the second blocking block 26 are arranged in opposite directions, the first spring 18 acts on the first blocking block 19, so that the inclined surface of the first blocking block 19 presses against the connecting rod 11; the second spring 25 acts on the second blocking block 26, so that the inclined surface of the second blocking block 26 extends into the second connecting hole 10.

[0042] When the first connecting plate 1 and the second connecting plate 2 are connected, the first spring 18 drives the first blocking block 19 to engage in the first locking groove 21, and the second spring 25 drives the second blocking block 26 to engage in the second locking groove 22.

[0043] For further details, please refer to Figure 11 The prefabricated pin 12 includes a limiting bracket 31, a safety rod 32, and a third spring 33; the limiting bracket 31 is hinged to the safety rod 32; the third spring 33 is sleeved on the safety rod 32, and its two ends are fixed to the limiting bracket 31; one end of the limiting bracket 31 abuts against the outer surface of the first connecting platform 5.

[0044] Furthermore, for the connection method of the I-beam connection node for tunnel support according to this embodiment of the invention, please refer to... Figure 1-11 The first tooth groove 3 and the second tooth groove 7 mesh, and the first limiting side groove 4 and the second limiting side groove 8 abut and align; the first connecting hole 6 and the second connecting hole 10 are aligned at their centers, the limiting bracket 31 of the pre-made pin 12 is pressed and the safety rod 32 is pulled outward, and the pre-made pin 12 is pulled out to release the temporary lock on the connecting rod 11; the connecting rod 11 is pushed to the second connecting hole 10, so that the connecting rod 11 moves to the position where the first locking groove 21 is aligned with the first blocking block 19 and the second locking groove 22 is aligned with the second blocking block 26; the first blocking block 19 is inserted into the first locking groove 21 under the action of the first spring 18, and the second blocking block 26 is inserted into the second locking groove 22 under the action of the second spring 25, thus completing the locking.

[0045] The above description merely illustrates the embodiments of the present invention and is quite specific and detailed. However, it should not be construed as a limitation on the scope of the patent. It is worth noting that everything within the concept and principles of the present invention falls within the protection scope of the present invention.

Claims

1. A tunnel support I-beam connection node, characterized by: The utility model provides a kind of connecting plate, including first connecting plate and second connecting plate, the first connecting plate and the second connecting plate have mutually contacted connecting surface and opposite back surface;The connecting surface of the first connecting plate is equipped with first tooth slot and first limit side slot;The back surface of the first connecting plate is equipped with first connecting table;The first connecting plate is equipped with first connecting hole passing through itself and the first connecting table;The first connecting table is equipped with movable connecting rod, prefabricated pin, prefabricated pin hole and first blocking block;The connecting rod is equipped with connecting rod hole, first locking groove and second locking groove;The connecting surface of the second connecting plate is equipped with second tooth slot and second limit side slot;The back surface of the second connecting plate is equipped with second connecting table;The second connecting plate is equipped with second connecting hole passing through itself and the second connecting table;The second connecting table is equipped with second blocking block; The prefabricated pin passes through the prefabricated pin hole and connecting rod hole, and the connecting rod is temporarily locked in the first connecting hole;In the first connecting plate and the second connecting plate connection state, the first tooth slot is engaged with the second tooth slot, the first limit side slot is abutted and aligned with the second limit side slot, and the first connecting hole is centrally aligned with the second connecting hole. The connecting rod passes through the first connecting hole and the second connecting hole, the first blocking block is clamped in the first locking groove, and the second blocking block is clamped in the second locking groove.

2. The I-beam connection node for tunnel support according to claim 1, characterized in that: The first connecting plate includes at least four first connecting tables, the first connecting tables are symmetrically arranged along the first connecting plate, the second connecting plate includes at least four second connecting tables, and the second connecting tables are symmetrically arranged along the second connecting plate.

3. The I-beam connection node for tunnel support according to claim 1, characterized in that: The first connecting table further includes a first connecting groove, a first bolt, a first bolt hole, a first connecting block, and a first spring, the first connecting block, the first spring, and the first blocking block are accommodated in the first connecting groove, the first spring is fixedly connected to the first connecting block and the first blocking block at two ends respectively, the first connecting block is provided with a first fixing hole, and the first bolt passes through the first bolt hole and the first fixing hole to fix the first connecting block in the first connecting groove. The second connecting table further includes a second connecting groove, a second bolt, a second bolt hole, a second connecting block, and a second spring, the second connecting block, the second spring, and the second blocking block are accommodated in the second connecting groove, the second spring is fixedly connected to the second connecting block and the second blocking block at two ends respectively, the second connecting block is provided with a second fixing hole, and the second bolt passes through the second bolt hole and the second fixing hole to fix the second connecting block in the second connecting groove.

4. The I-beam connection node for tunnel support according to claim 1, characterized in that: The first locking groove, the second locking groove, the first connecting groove, the first bolt, the first bolt hole, the first connecting block, the first spring, and the first blocking block are symmetrically arranged along the first connecting hole axis, and the second connecting groove, the second bolt, the second bolt hole, the second connecting block, the second spring, and the second blocking block are symmetrically arranged along the second connecting hole axis.

5. The I-beam connection node for tunnel support of claim 1, wherein: The first block and the second block are trapezoidal bodies, the first block and the second block are reversely arranged, the first spring acts on the first block, and the inclined surface of the first block is pressed against the connecting rod; the second spring acts on the second block, and the inclined surface of the second block extends into the second connecting hole.

6. The I-beam connection node of claim 1, wherein: The preformed pin comprises a limiting support, a bumper and a third spring; the limiting support is hinged with the bumper; the third spring is sleeved on the bumper, and both ends of the third spring are fixed to the limiting support; the limiting support abuts against the outer surface of the first connecting table.

7. A method of connecting the nodes of an I-beam for tunnel support according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1: the first tooth groove is engaged with the second tooth groove; the first limiting edge groove is aligned with the second limiting edge groove, and the first connecting hole is aligned with the second connecting hole; S2: the limiting support of the preformed pin is pressed and the bumper is pulled outwards, the preformed pin is pulled out to release the temporary locking of the connecting rod; S3: the connecting rod is pushed to the second connecting hole, so that the connecting rod is moved to a position where the first locking groove is aligned with the first block and the second locking groove is aligned with the second block; S4: the first block is clamped into the first locking groove under the action of the first spring, and the second block is clamped into the second locking groove under the action of the second spring, and the locking is completed.

Images