CN219119286U

CN219119286U - Supporting structure for construction of hard rock large-section tunnel

Info

Publication number: CN219119286U
Application number: CN202222885656.9U
Authority: CN
Inventors: 王含; 李新平; 唐仪强; 朱林; 齐媛元; 邹业强; 杨洋
Original assignee: Sichuan Energy Construction Engineering Group Co ltd
Current assignee: Sichuan Energy Construction Engineering Group Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-06-02
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a supporting structure for construction of a hard rock large-section tunnel, which relates to the technical field of supporting structures and comprises supporting columns and supporting tops, wherein the supporting columns are symmetrically arranged below two sides of the supporting tops, supporting frames are arranged below the supporting tops, supporting plates for supporting the inner wall of the tunnel are arranged above the supporting tops, each supporting column comprises a buffer base, a column body and a supporting table, the buffer base is detachably assembled on the ground of the tunnel, the upper end and the lower end of each column body are respectively assembled and connected with the buffer base and the supporting table, a first cylinder is hinged to one side of each column body, and one end of each first cylinder is hinged to the lower side of each supporting top; this bearing structure of construction of big section tunnel of hard rock passes through the support column, supports top, first cylinder and telescopic supporting mechanism's cooperation, realizes the stronger stability of whole bearing structure, can cushion the whole support under the emergency simultaneously and make it be difficult for empting.

Description

Supporting structure for construction of hard rock large-section tunnel

Technical Field

The utility model relates to the technical field of supporting structures, in particular to a supporting structure for hard rock large-section tunnel construction.

Background

Large section tunnels are generally mainly railway, highway and subway tunnels, and also generally tunnels with sections above 40m2 are excavated, so as to distinguish tunnels such as hydraulic tunnels with smaller sections. Along with the promotion of national economy and the acceleration of construction of national infrastructure, along with the rapid development of economy and the continuous improvement of technical level, more and more railways, highways and subway tunnels are built in China, and more large-section and extra-large-section tunnels are built in underground engineering;

in the prior art, the supporting structure for the hard rock large-section tunnel usually focuses on the supporting connection position with the inner wall of the tunnel, the arrangement of the bearing column body structure below is simpler, when unexpected conditions occur, the inner wall of the tunnel can slightly shake, and the support column body which is simpler or is directly and vertically arranged can easily collapse or break, so that certain potential safety hazards exist.

Disclosure of Invention

Aiming at the problems, the utility model provides the supporting structure for the construction of the hard rock large-section tunnel, which realizes stronger stability of the whole supporting structure through the cooperation of the supporting column, the supporting top, the first cylinder and the telescopic supporting mechanism, and can buffer the whole bracket under the emergency condition so as to prevent the bracket from toppling over easily.

In order to solve the problems, the utility model provides a supporting structure for construction of a hard rock large-section tunnel, which comprises supporting columns and supporting tops, wherein the supporting columns are symmetrically arranged below two sides of the supporting tops, supporting frames are arranged below the supporting tops, supporting plates for supporting the inner wall of the tunnel are arranged above the supporting tops, each supporting column comprises a buffer base, a column body and a supporting table, the buffer base is detachably assembled on the ground of the tunnel, the upper end and the lower end of each column body are respectively assembled and connected with the buffer base and the supporting table, one side of each column body is hinged with a first cylinder, one end of each first cylinder is hinged with the lower side of each supporting top, and the upper ends of the first cylinders which are oppositely arranged are assembled and connected through telescopic supporting mechanisms.

The further improvement is that: the lower extreme of cylinder slides and sets up the inside top of buffering base, cylinder lower extreme edge pass through first spring with buffering base assembly connection, cylinder central point puts the department and is equipped with flexible buffer gear, buffering base's lower extreme passes through the ground nail assembly subaerial.

The further improvement is that: the telescopic buffer mechanism comprises a second spring and a telescopic rod, the telescopic rod is arranged at the center of the buffer base and the cylinder, and the second spring is arranged between the buffer base and the cylinder outside the telescopic rod.

The further improvement is that: the supporting table is integrally in an inverted round table-shaped structure, supporting rods which are obliquely arranged are arranged at the edge of the supporting table, and a plurality of supporting rods are arranged at equal intervals.

The further improvement is that: the telescopic supporting mechanism comprises a loop bar, an inner bar and an adjusting sleeve, one end of the inner bar is rotationally connected with internal threads of the loop bar, one end of the adjusting sleeve is rotationally arranged on the inner wall of the loop bar, the other end of the adjusting sleeve is in threaded connection with the outer wall of the inner bar, and two ends of the telescopic supporting mechanism are symmetrically arranged and detachably assembled with the upper end of the first cylinder.

The further improvement is that: the upper end of the first cylinder is arranged below the supporting frame through a right-angle frame, one side of the right-angle frame is provided with a limiting block, a groove is formed in the limiting block, and the end face of the loop bar or the inner bar is provided with a clamping block which is assembled by clamping the limiting block.

The further improvement is that: the backup pad is the arc structure, the medial surface of backup pad pass through scissors elevating platform with support top assembly connection.

The beneficial effects of the utility model are as follows: this bearing structure of construction of big section tunnel of hard rock is through the cooperation of supporting roof and support column, realize propping up the operation to supporting the roof steadily, through the support frame that sets up, further increased the stability of supporting the roof, the central point department to supporting the roof below supports, avoid the phenomenon of collapsing because of the unstable structure leads to, through setting up the buffering base in the below of cylinder, realize carrying out the buffering to a certain extent to the shock sensation under the slight condition of rocking, thereby make bearing structure be difficult for collapsing, through set up first cylinder between support column and supporting roof below, make and support the roof, form stable triangular structure between first cylinder and the support column, further guarantee its stability, through setting up telescopic support mechanism between first cylinder, realize spacing the position of first cylinder upper end, guarantee its stability.

Drawings

FIG. 1 is a schematic diagram of the present utility model.

FIG. 2 is a schematic diagram of a support column according to the present utility model.

Fig. 3 is an enlarged schematic view of the structure a in fig. 2 according to the present utility model.

Fig. 4 is a schematic structural view of the telescopic supporting mechanism of the present utility model.

Wherein: 1. a support column; 2. a support roof; 3. a support frame; 4. a support plate; 5. a buffer base; 6. a column; 7. a support table; 8. a first cylinder; 9. a first spring; 10. ground nails; 11. a second spring; 12. a telescopic rod; 13. a support rod; 14. a loop bar; 15. an inner rod; 16. an adjusting sleeve; 17. a right angle frame; 18. a limiting block; 19. a clamping block; 20. a scissor type lifting platform.

Detailed Description

The present utility model will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

According to the figures 1, 2, 3, 4, this embodiment provides a supporting structure for construction of a hard rock large-section tunnel, including a supporting column 1 and a supporting top 2, the supporting column 1 is symmetrically arranged below two sides of the supporting top 2, a supporting frame 3 is arranged below the supporting top 2, a supporting plate 4 for supporting the inner wall of the tunnel is arranged above the supporting top 2, the supporting column 1 includes a buffer base 5, a column body 6 and a supporting table 7, the buffer base 5 is detachably assembled on the ground of the tunnel, the upper end and the lower end of the column body 6 are respectively assembled and connected with the buffer base 5 and the supporting table 7, one side of the column body 6 is hinged with a first air cylinder 8, one end of the first air cylinder 8 is hinged with the lower side of the supporting top 2, the upper ends of the first air cylinders 8 which are oppositely arranged are assembled and connected through a telescopic supporting mechanism, when the tunnel is supported, the supporting roof 2 is stably supported by the cooperation of the supporting roof 2 and the supporting column 1, the stability of the supporting roof 2 is further increased by the supporting frame 3, the central position below the supporting roof 2 is supported, collapse phenomenon caused by unstable structure is avoided, the supporting plate 4 is arranged above the supporting roof 2, the supporting plate 4 is far away from one surface of the supporting roof 2 and the inner wall of the tunnel are tightly attached by adjusting the position of the supporting plate 4, so that the effective supporting effect on the inner wall of the tunnel is achieved, when an emergency occurs, the supporting roof 2 is driven by the tunnel roof to slightly shake, and at the moment, if the supporting roof 2, the supporting column 1 and the ground are fixedly assembled, no buffer space exists, the possibility of breakage of the supporting column 1 is greatly caused, the buffer base 5 is arranged below the column 6, realize carrying out the buffering to a certain extent to the shock sensation under the slight condition of rocking to make bearing structure be difficult for collapsing, through set up first cylinder 8 between support column 1 and support top 2 below, make to form stable triangle structure between support top 2, first cylinder 8 and the support column 1, further guarantee its stability, through set up telescopic supporting mechanism between first cylinder 8, realize spacing the position of first cylinder 8 upper end, guarantee its stability.

The lower extreme of cylinder 6 slides and sets up the inside top of buffering base 5, cylinder 6 lower extreme edge pass through first spring 9 with buffering base 5 fit connection, cylinder 6 central point puts the department and is equipped with flexible buffer gear, buffering base 5's lower extreme passes through ground nail 10 to be assembled subaerial, through the flexible buffer gear of first spring 9 and center setting, effectively realizes the buffering effect of cylinder 6 that sets up on buffering base 5.

The telescopic buffer mechanism comprises a second spring 11 and a telescopic rod 12, the telescopic rod 12 is arranged at the central positions of the buffer base 5 and the column body 6, and the second spring 11 is arranged between the buffer base 5 and the column body 6 outside the telescopic rod 12.

The supporting bench 7 is wholly the round platform column structure of falling to establish, the edge of supporting bench 7 is equipped with the bracing piece 13 that the slope set up, bracing piece 13 equidistance is equipped with a plurality ofly, through the supporting bench 7 of setting, has effectively increased the area of contact between support column 1 and the supporting roof 2 to increase its stability.

The telescopic supporting mechanism comprises a loop bar 14, an inner bar 15 and an adjusting sleeve 16, one end of the inner bar 15 is rotationally connected with internal threads of the loop bar 14, one end of the adjusting sleeve 16 is rotationally arranged on the inner wall of the loop bar 14, the other end of the adjusting sleeve 16 is in threaded connection with the outer wall of the inner bar 15, two ends of the telescopic supporting mechanism are symmetrically arranged at the upper end of the first cylinder 8 and can be detachably assembled, the inner bar 15 can be driven to move inside and outside the adjusting sleeve 16 through rotating the adjusting sleeve 16, and the internal bar 15 during inward movement is rotationally arranged in the loop bar 14, so that the telescopic operation of the whole telescopic supporting mechanism is realized.

The upper end of the first cylinder 8 is arranged below the supporting frame 3 through a right-angle frame 17, one side of the right-angle frame 17 is provided with a limiting block 18, a groove is arranged in the limiting block 18, the end face of the loop bar 14 or the inner bar 15 is provided with a clamping block 19 which is assembled by clamping the limiting block 18, and the stability of assembly of two ends of the telescopic supporting mechanism between two adjacent first cylinders 8 is realized through the clamping assembly of the clamping block 19 and the limiting block 18.

The backup pad 4 is the arc structure, the medial surface of backup pad 4 pass through scissors elevating platform 20 with support top 2 assembly connection supports backup pad 4 through scissors elevating platform 20 that set up, has effectively increased the stability that scissors elevating platform 20 supported backup pad 4, avoids appearing using single cylinder to support the time, because the uneven support effect that leads to the backup pad to the tunnel of atress area is not good problem.

This bearing structure of construction of big section tunnel of hard rock supports the tunnel, through the cooperation of supporting roof 2 and support column 1, realizes propping up the operation to supporting roof 2 steadily, through the support frame 3 that sets up, has further increased the stability of supporting roof 2, supports the central point department of supporting roof 2 below, avoids the collapse phenomenon that leads to because of the structure instability, through setting up backup pad 4 in the top of supporting roof 2, through adjusting the position of backup pad 4 for backup pad 4 keeps away from the one side and the inseparable laminating of tunnel inner wall of supporting roof 2, thereby reach the effective supporting effect to tunnel inner wall, make when taking place the emergency, the tunnel roof drives supporting roof 2 and rocks slightly, if all be fixed assembly between supporting roof 2, support column 1 and the ground this moment, does not have the buffering room, can greatly probably lead to the possibility of support column 1 rupture, through setting up buffering base 5 in the below of cylinder 6 to a certain extent to the shock sensation under the circumstances of rocking, thereby make bearing structure be difficult for collapsing, through setting up first top 8 between support column 1 and supporting roof 2 below, make support cylinder 8 and the realization of a stable cylinder, the stability is guaranteed between its further cylinder and 8, the stability is guaranteed.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a bearing structure of large section tunnel construction of hard rock which characterized in that: including support column (1) and support top (2), support column (1) symmetry sets up the both sides below of support top (2), support top (2) below is equipped with support frame (3), the top of support top (2) is equipped with backup pad (4) that are used for supporting with tunnel inner wall, support column (1) are including buffering base (5), cylinder (6) and brace table (7), buffering base (5) can dismantle the assembly subaerial, the upper end and the lower extreme of cylinder (6) respectively with buffering base (5) and brace table (7) assembly connection, one side of cylinder (6) articulates and is equipped with first cylinder (8), the one end of first cylinder (8) with the below of support top (2) articulates the setting, sets up relatively through flexible supporting mechanism assembly connection between first cylinder (8) upper end.

2. The support structure for construction of a hard rock large-section tunnel according to claim 1, wherein: the lower extreme of cylinder (6) slides and sets up buffer base (5) inside top, cylinder (6) lower extreme edge pass through first spring (9) with buffer base (5) fit connection, cylinder (6) central point puts the department and is equipped with flexible buffer gear, the lower extreme of buffer base (5) passes through ground nail (10) and assembles subaerial.

3. The support structure for construction of a hard rock large-section tunnel according to claim 2, wherein: the telescopic buffer mechanism comprises a second spring (11) and a telescopic rod (12), the telescopic rod (12) is arranged at the central positions of the buffer base (5) and the column body (6), and the second spring (11) is arranged between the buffer base (5) and the column body (6) outside the telescopic rod (12).

4. The support structure for construction of a hard rock large-section tunnel according to claim 1, wherein: the supporting table (7) is integrally of an inverted round table-shaped structure, supporting rods (13) which are obliquely arranged are arranged at the edge of the supporting table (7), and a plurality of supporting rods (13) are arranged at equal intervals.

5. The support structure for construction of a hard rock large-section tunnel according to claim 1, wherein: the telescopic supporting mechanism comprises a loop bar (14), an inner bar (15) and an adjusting sleeve (16), one end of the inner bar (15) is rotationally connected with internal threads of the loop bar (14), one end of the adjusting sleeve (16) is rotationally arranged on the inner wall of the loop bar (14), the other end of the adjusting sleeve (16) is in threaded connection with the outer wall of the inner bar (15), and two ends of the telescopic supporting mechanism are symmetrically arranged and detachably assembled with the upper end of the first air cylinder (8).

6. The supporting structure for construction of a hard rock large-section tunnel according to claim 5, wherein: the utility model discloses a hydraulic lifting device for a hydraulic lifting device, including support frame (3), right angle frame (17) setting, stopper (18) are equipped with to one side of right angle frame (17), be equipped with the groove in stopper (18), the terminal surface of loop bar (14) or interior pole (15) be equipped with stopper (18) block assembly's block piece (19) through right angle frame (17) setting of first cylinder (8) below support frame (3).

7. The support structure for construction of a hard rock large-section tunnel according to claim 1, wherein: the supporting plate (4) is of an arc-shaped structure, and the inner side surface of the supporting plate (4) is assembled and connected with the supporting top (2) through the scissor type lifting table (20).