Bottom plate impact resistant three-hinged arch supporting structure

Abstract

The invention relates to a three-hinged arch supporting structure capable of resisting bottom plate impact. The bottom plate impact resistant three-hinged arch supporting structure comprises a sleeve, a pile, a left arc pipe and a right arc pipe, wherein the left arc pipe and the right arc pipe are symmetrically arranged; the left arc tube comprises a left arc top and a left stand column which are integrated. The right arc pipe comprises a right arc top and a right stand column which are integrated. The lower ends of the left stand column and the right stand column are hinged to the upper ends of the piles. The piles are embedded below a roadway bottom plate; the left arc top end part and the right arc top end part are connected through a sleeve; the sleeve is of a straight pipe structure. The overall three-hinged arch structure is formed by splicing; the connection strength of the left arc top and the right arc top is improved through the sleeve; the sleeve can also be respectively rubbed with the left arc top end part and the right arc top end part to absorb energy; the hinged structure of the lower end of the left stand column, the lower end of the right stand column and the pile column has a certain retractable receding function, the principle of yielding supporting is met, and therefore the whole roadway is protected.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel support, and in particular to a three-hinged arch support structure capable of resisting bottom plate impact. Background Art

[0002] Analysis of the mechanism of rock burst inducing the tunnel floor shows that horizontal stress is the most important factor inducing rock burst in the floor. In the field of tunnel support, the conventional support structure is a steel pipe support, the main body of which is an arched structure; the arched structure can convert the vertical stress of the arch to the horizontal direction, offsetting part of the horizontal stress. However, the steel pipe support does not have the performance of shrinking and giving way, which is not conducive to buffering the energy transmitted by rock burst, and still causes the floor to deform due to impact. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problem and to provide a three-hinged arch supporting structure for resisting bottom plate impact.

[0004] The technical solution of the present invention is: a three-hinged arch support structure for resisting bottom plate impact includes a casing, a pile, a symmetrically arranged left arc tube and a right arc tube; the left arc tube includes an integrated left arc top and a left column; the right arc tube includes an integrated right arc top and a right column; the lower end of the left column and the lower end of the right column are both hinged to the upper end of the pile column; the pile column is buried below the bottom plate of the tunnel; the top end of the left arc and the top end of the right arc are connected through the casing; the casing is a straight tube structure, which plays the role of connecting the left arc tube and the right arc tube, and when impacted by ground pressure, the friction with the left arc top and the right arc top provides a certain amount of energy absorption by giving way; the hinge of the left column, the right column and the pile column can perform a certain amount of tilting and giving way, which conforms to the principle of pressure-yielding support and achieves an overall protective effect on the tunnel.

[0005] Preferably, the middle section of the sleeve is a solid structure to improve the structural strength of the sleeve itself.

[0006] Preferably, the three-hinged arch support structure for resisting bottom plate impact also includes a hinged plate; the bottom end surfaces of the left column and the right column are both provided with embedded grooves; the upper end of the hinged plate is inserted into the embedded groove, which can achieve a certain frictional displacement and energy absorption effect; the lower end of the hinged sleeve is hinged to the upper end of the pile column.

[0007] Furthermore, the three-hinged arch support structure for resisting bottom plate impact also includes a hinge axis; a hinge hole A is provided at the lower end of the hinge plate; a hinge hole B is provided at the upper end of the pile column; the hinge axis passes through the hinge hole A and the hinge hole B; the hinge axis is arranged horizontally; the force directions of the left arc tube and the right arc tube are on the same vertical plane; the axis of the hinge axis is perpendicular to the axis of the casing, so that the deflection direction of the pile column is on the same vertical plane as the vertical plane, which is beneficial to the absorption of impact ground pressure by the deflection of the pile column.

[0008] Furthermore, an end face groove matching the hinged plate is provided at the upper end of the pile column; the lower end of the hinged plate is inserted into the end face groove; the end face groove limits the hinged plate so that its deflection direction is in the same vertical plane as the left arc tube and the right arc tube.

[0009] Furthermore, the end face groove is arranged at the center of the upper end of the pile column, which is beneficial to the transmission of force.

[0010] Furthermore, a circular arc surface is provided at the lower end of the hinged plate, which is beneficial to the deflection of the pile column.

[0011] Furthermore, the axis of the arc surface is higher than the axis of hinge hole B, limiting the deflection of the pile column within a certain angle range.

[0012] Furthermore, the embedding groove is arranged at the center of the bottom end surface of the left column / the bottom end surface of the right column, which is beneficial to the transmission of force.

[0013] The beneficial effects of the present invention are as follows: the three-hinged arch supporting structure for resisting bottom plate impact of the present invention has the following advantages: (1) The present invention is a three-hinged arch structure formed by splicing. The casing improves the connection strength between the left arc top and the right arc top. The casing can also absorb energy by friction with the top of the left arc and the top of the right arc respectively. The hinged structure between the lower end of the left column, the lower end of the right column and the pile column has a certain retractable function, which conforms to the principle of pressure-yielding support, thereby achieving an overall protection effect on the tunnel. (2) The hinged plate of the present invention cooperates with the embedded groove to achieve a certain frictional energy absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the three-hinged arch supporting structure for resisting bottom plate impact of the present invention; Figure 2 yes Figure 1 I magnified view of; Figure 3 yes Figure 1 A vertical cross-sectional view of Figure 4 is a cutaway stereogram of the connecting sleeve; In the figure: 1. casing, 2. pile, 21. hinge hole B, 22. end face groove, 3. left arc tube, 31. left arc top, 32. left column, 4. right arc tube, 41. right arc top, 42. right column, 5. hinge plate, 51. hinge hole A, 52. arc surface, 6. embedded groove, 7. hinge axis. DETAILED DESCRIPTION

[0015] Example 1: See Figure 1-4A three-hinged arch support structure for resisting bottom plate impact comprises a casing 1, a pile 2, a symmetrically arranged left arc tube 3 and a right arc tube 4; the left arc tube 3 comprises an integrated left arc top 31 and a left column 32; the right arc tube 4 comprises an integrated right arc top 41 and a right column 42; the lower ends of the left column 32 and the right column 42 are hinged to the upper end of the pile 2; the pile 2 is buried below the bottom plate of the tunnel; the ends of the left arc top 31 and the right arc top 41 are connected through the casing 1; the casing 1 is a straight tube structure, which plays the role of connecting the left arc tube 3 and the right arc tube 4. When subjected to ground pressure impact, the friction with the left arc top 31 and the right arc top 41 provides a certain amount of energy absorption by giving way; the left column 32, the right column 42 are hinged to the pile 2, and can make a certain amount of tilt and give way, which conforms to the principle of pressure-yielding support and achieves an overall protective effect on the tunnel.

[0016] The present invention is a three-hinged arch structure formed by splicing as a whole; the casing 1 improves the connection strength between the left arc top 31 and the right arc top 41; the casing 1 can also absorb energy by friction with the end of the left arc top 31 and the end of the right arc top 41 respectively; the hinged structure between the lower end of the left column 32, the lower end of the right column 42 and the pile column 2 has a certain retractable function, which conforms to the principle of pressure-yielding support, thereby achieving an overall protective effect on the tunnel.

[0017] The middle section of the sleeve 1 is a solid structure, which improves the structural strength of the sleeve 1 itself.

[0018] The three-hinged arch support structure against bottom plate impact also includes a hinged plate 5; the bottom end surfaces of the left column 32 and the right column 42 are both provided with an embedding groove 6; the upper end of the hinged plate 5 is inserted into the embedding groove 6, which can achieve a certain frictional displacement energy absorption effect; the lower end of the hinged sleeve is hinged to the upper end of the pile column 2.

[0019] The three-hinged arch support structure for resisting bottom plate impact also includes a hinge shaft 7; a hinge hole A 51 is provided at the lower end of the hinge plate 5; a hinge hole B 21 is provided at the upper end of the pile column 2; the hinge shaft 7 passes through the hinge hole A 51 and the hinge hole B 21; the hinge shaft 7 is arranged horizontally; the force directions of the left arc tube 3 and the right arc tube 4 are on the same vertical plane; the axis of the hinge shaft 7 is perpendicular to the axis of the casing 1, so that the deflection direction of the pile column 2 is on the same vertical plane as the vertical plane, which is beneficial to the absorption of the impact ground pressure by the deflection of the pile column 2.

[0020] The upper end of the pile column 2 is provided with an end surface groove 22 matching the hinged plate 5; the lower end of the hinged plate 5 is inserted into the end surface groove 22; the end surface groove 22 limits the hinged plate 5 so that its deflection direction is in the same vertical plane as the left arc tube 3 and the right arc tube 4.

[0021] The end face groove 22 is arranged at the center of the upper end of the pile column 2, which is beneficial to the transmission of force.

[0022] The lower end of the hinged plate 5 is provided with an arc surface 52 , which is beneficial to the deflection of the pile column 2 .

[0023] The axis of the arc surface 52 is higher than the axis of the hinge hole B 21, limiting the deflection of the pile column 2 within a certain angle range.

[0024] The embedding groove 6 is arranged at the center of the bottom end surface of the left column 32 / the bottom end surface of the right column 42, which is beneficial to the transmission of force.

[0025] Working principle of this embodiment: the support structure as a whole is a three-hinged arch structure formed by splicing; the casing 1 increases the connection strength between the left arc top 31 and the right arc top 41; the casing 1 can also absorb energy by friction with the end of the left arc top 31 and the end of the right arc top 41 respectively; the hinged structure between the lower end of the left column 32, the lower end of the right column 42 and the pile column 2 has a certain retractable function, which conforms to the principle of pressure-yielding support, thereby achieving an overall protective effect on the tunnel.

[0026] Embodiment 2: Embodiment 2 is basically the same as Embodiment 1, and the similarities are not repeated here. The difference is that the outer diameter of the left arc top 31 end and the outer diameter of the right arc top 41 end are matched with the inner diameter of the casing 1, which is conducive to the assembly of the three-hinged arch support structure.

Claims

1. A three-hinged arch support structure for resisting bottom plate impact, characterized in that: It includes casing, piles, symmetrically arranged left arc tube and right arc tube; the left arc tube includes an integrated left arc top and left column; the right arc tube includes an integrated right arc top and right column; the lower ends of the left column and the right column are hinged to the upper end of the pile; the pile is buried below the bottom plate of the tunnel; the top end of the left arc and the top end of the right arc are connected through the casing; the casing is a straight tube structure.

2. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 1 is characterized in that: The middle section of the casing is a solid core structure.

3. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 1 is characterized in that: It also includes a hinged plate; the bottom end faces of the left column and the right column are both provided with embedded grooves; the upper end of the hinged plate is inserted into the embedded groove; the lower end of the hinged sleeve is hinged with the upper end of the pile column.

4. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 3 is characterized in that: It also includes an articulated shaft; the lower end of the articulated plate is provided with an articulated hole A; the upper end of the pile column is provided with an articulated hole B; the articulated shaft passes through the articulated hole A and the articulated hole B; the articulated shaft is horizontally arranged; the axis of the articulated shaft is perpendicular to the axis of the casing.

5. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 3 is characterized in that: The upper end of the pile column is provided with an end surface groove matched with the hinged plate; the lower end of the hinged plate is inserted into the end surface groove.

6. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 5 is characterized in that: The end face groove is arranged at the center of the upper end of the pile column.

7. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 5 is characterized in that: The lower end of the hinged plate is provided with an arc surface.

8. The three-hinged arch supporting structure for resisting bottom plate impact according to claim 7 is characterized in that: The axis center of the arc surface is higher than the axis center of hinge hole B.

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