CN215761696U

CN215761696U - Buffering energy-absorbing support composite structure

Info

Publication number: CN215761696U
Application number: CN202122258807.3U
Authority: CN
Inventors: 詹伟; 胡智; 严鑫; 余以强; 肖旦强; 叶霄
Original assignee: Zhejiang Scientific Research Institute of Transport
Current assignee: Zhejiang Scientific Research Institute of Transport
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-02-08
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a buffering energy-absorbing supporting composite structure, which comprises a U-shaped steel frame, wherein the U-shaped steel frame comprises first U-shaped steel and second U-shaped steel, the first U-shaped steel is fixedly connected to two sides of the bottom end of the second U-shaped steel, a bottom plate is connected to the bottom end between the two first U-shaped steel, the opening surfaces of the first U-shaped steel and the second U-shaped steel face the inner wall of a tunnel, reinforced steel cables are arranged in the first U-shaped steel and the second U-shaped steel, strip plates are arranged between the first U-shaped steel and the tunnel and between the second U-shaped steel and the tunnel, one side of each strip plate, far away from the inner wall of the tunnel, is fixedly connected with a protection mechanism, one end of each protection mechanism, far away from each strip plate, faces the reinforced steel cables, and the distance between one end of each protection mechanism, far away from each strip plate, and the reinforced steel cables is smaller than the maximum distance of the two side walls of the U-shaped steel frame, which expands outwards; through install the fixed column additional between rectangular board and reinforcement steel cable, will enclose pressure absorption slowly-releasing and transfer to whole U shaped steel frame. The buffering energy-absorbing support composite structure is suitable for high confining pressure conditions, can improve the safety of underground construction, and reduces the confining pressure collapse risk.

Description

Buffering energy-absorbing support composite structure

Technical Field

The utility model relates to an underground engineering supporting structure, in particular to a buffering energy-absorbing supporting composite structure.

Background

The large infrastructure powerfully promotes human civilization and social progress, simultaneously makes resource environment difficult to continue, and the global environment problem is increasingly prominent. The netherlands propose "green heart zones" that only underground projects are built to minimize existing landscape damage. Infrastructure construction is showing a trend to transition from above ground to below ground. Underground space is used as a novel homeland resource, and more countries pay attention to the development and utilization of deep (50-100 m) space. However, the difficulty of the construction technology of the underground middle layer and even the deep layer is high, compared with the ground engineering, the problem of high ground stress of the underground deep layer is more prominent, the tunneling tunnel is strongly deformed when meeting special hydrogeological conditions, even the tunnel section is seriously necked down, and the life safety of underground construction technicians is seriously threatened.

In order to improve the safety performance of high-ground-stress underground tunnel construction, a buffering energy-absorbing supporting composite structure is additionally arranged in the tunnel. When the acting force that U shaped steel frame received among the current composite construction of strutting is too big, because not set up protection machanism, in case when exceeding U shaped steel frame both sides wall deformation maximum value, can directly lead to U shaped steel frame both sides wall rupture for U shaped steel frame loses buffering energy-absorbing function, reduces its support performance, has great potential safety hazard.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a buffering and energy-absorbing supporting composite structure which can solve the technical problems that when an acting force applied to a U-shaped steel frame in the existing supporting composite structure is too large, once the acting force exceeds the maximum deformation value of two side walls of the U-shaped steel frame, the two side walls of the U-shaped steel frame are directly broken, the U-shaped steel frame loses the buffering and energy-absorbing functions, the supporting performance is reduced, and great potential safety hazards exist.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a buffering energy-absorbing support composite construction, includes U shaped steel frame, U shaped steel frame includes first U shaped steel and second U shaped steel, first U shaped steel fixed connection is in second U shaped steel bottom both sides, two the bottom is connected with the bottom plate between the first U shaped steel, first U shaped steel and second U shaped steel open face all towards the tunnel inner wall, set up in the first U shaped steel and in the second U shaped steel and consolidate the steel cable, consolidate the steel cable end to end and form tunnel cross sectional shape, consolidate the steel cable and be used for promoting whole support composite construction built-up connection structure intensity, all be provided with the rectangular board between first U shaped steel and the tunnel and between second U shaped steel and the tunnel, the rectangular board is far away from tunnel inner wall one side fixedly connected with protection machanism, and protection machanism keeps away from rectangular board one end towards consolidating the steel cable, protection machanism keeps away from the distance between rectangular board one end and the reinforcement steel cable and is less than the outside maximum distance that expands of U shaped steel frame both sides wall .

As a preferable technical scheme of the utility model, the protection mechanism comprises a fixed column, the fixed column is fixedly connected to one side of the long strip plate, which is far away from the inner wall of the tunnel, one end of the fixed column, which is far away from the long strip plate, is connected with an arc-shaped block, the opening end of the arc-shaped block faces to the reinforcing steel cable, and the distance between the arc-shaped block and the reinforcing steel cable is smaller than the maximum distance of outward expansion of two side walls of the U-shaped steel frame.

As a preferable technical scheme of the utility model, the shape of the second U-shaped steel is consistent with that of the top surface of the tunnel.

As a preferable technical scheme of the utility model, the long strip plates are equidistantly distributed on the outer side of the first U-shaped steel and the outer side of the second U-shaped steel.

As a preferable technical scheme of the utility model, angle plates are arranged on the inner side and the outer side of the joint of the first U-shaped steel and the second U-shaped steel, and the first U-shaped steel and the second U-shaped steel are connected together through bolts and nuts by the two angle plates.

As a preferred technical scheme of the utility model, a rubber pad is arranged on the inner side of the arc-shaped block.

As a preferred technical scheme of the utility model, a telescopic column is additionally arranged between the fixed column and the arc-shaped block, a movable cavity is formed at one end of the fixed column close to the arc-shaped block, a mounting cavity communicated with the movable cavity is formed in the inner side of the movable cavity, a spring is arranged in the mounting cavity, one end of the telescopic column extends into the movable cavity and is connected with the spring, and the telescopic column can move in the movable cavity.

As a preferable technical scheme of the utility model, the distance between one end of the telescopic column, which is far away from the arc-shaped block, and the opening end of the installation cavity is also smaller than the maximum distance of outward expansion of the two side walls of the first U-shaped steel.

As a preferable technical scheme of the utility model, the opening end of the movable cavity is embedded into a cleaning ring, cleaning bristles are connected in the cleaning ring at equal annular distance, and the free ends of the cleaning bristles are in contact with the outer surface of the telescopic column.

Compared with the prior art, the utility model can achieve the following beneficial effects:

(1) by additionally arranging the fixing column between the strip plate and the reinforced steel cable, the surrounding rock pressure borne by the strip plate is transmitted to the second U-shaped steel through the strip plate, the two side walls of the second U-shaped steel are deformed under pressure, the received surrounding rock pressure is absorbed and buffered, in the process of the deformation of the two side walls of the second U-shaped steel, the strip plate can also move along with the deformation of the two side walls of the second U-shaped steel, meanwhile, the strip plate drives the fixing column to move, the fixing column drives the arc-shaped block to move towards the reinforced steel cable, when the two side walls of the second U-shaped steel are about to reach the maximum deformation value, the arc-shaped block is in close contact with the reinforced steel cable, the acting force is transmitted to the reinforced steel cable through the fixing column and the arc-shaped block, at the moment, the reinforced steel cable plays a role in improving the strength of the whole composite supporting structure combination connection structure, the part of the force can also be transferred to the first U-shaped steel, and the situation that the acting force borne by the second U-shaped steel exceeds the maximum deformation value of the two side walls is avoided, the service life of the second U-shaped steel is prolonged, the performance of the supporting composite structure for bearing high surrounding pressure is integrally improved, and the risk of surrounding rock collapse is reduced;

(2) by additionally arranging the telescopic column between the fixed column and the arc-shaped block and providing a supporting force for the telescopic column through the spring, the arc-shaped block is always attached to the outer surface of the reinforced steel cable, and the elongated plate moves along with the deformation of the two side walls of the second U-shaped steel, so that the arc-shaped block can not be dislocated with the reinforced steel cable, the reinforced steel cable can effectively transmit stress, the received surrounding rock pressure is shared, and the function and the safe construction of a supporting composite structure are further guaranteed;

(3) through at the clean ring of activity chamber open end embedding, clean ring inside is equidistant to be connected with clean brush hair, clean brush hair free end and flexible post surface contact, by the absorbent dust of clean brush hair sweeping flexible post surface, reduce the dust and get into the installation intracavity, the removal of guarantee flexible post in the installation intracavity is smooth and easy.

Drawings

FIG. 1 is a schematic view of a composite support structure according to the present invention;

FIG. 2 is a schematic view of a shielding mechanism according to a first embodiment of the present invention;

FIG. 3 is a schematic view of a shielding mechanism according to a second embodiment of the present invention;

FIG. 4 is a schematic cross-sectional structural view of a removable chamber according to the present invention;

FIG. 5 is an enlarged view of a portion a of FIG. 4;

wherein: 10. a U-shaped steel frame; 1. a first U-shaped steel; 2. a second U-shaped steel; 3. a base plate; 4. a strip plate; 5. a gusset; 6. reinforcing a steel cable; 71. fixing a column; 72. an arc-shaped block; 73. a rubber pad; 74. a telescopic column; 75. a movable cavity; 76. a mounting cavity; 77. a spring; 8. cleaning the ring; 81. the bristles are cleaned.

Detailed Description

The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Referring to fig. 1, the utility model provides a buffering and energy-absorbing supporting composite structure, which comprises a U-shaped steel frame 10, wherein the U-shaped steel frame 10 comprises first U-shaped steel 1 and second U-shaped steel 2, the first U-shaped steel 1 is fixedly connected to two sides of the bottom end of the second U-shaped steel 2, a bottom plate 3 is connected between the two first U-shaped steel 1, the shape of the second U-shaped steel 2 is consistent with that of the top surface of a tunnel and is attached to the top surface of the tunnel, the opening surfaces of the first U-shaped steel 1 and the second U-shaped steel 2 face the inner wall of the tunnel, reinforcing steel cables 6 are arranged in the first U-shaped steel 1 and the second U-shaped steel 2, the reinforcing steel cables 6 are connected end to form the cross-section shape of the tunnel, the reinforcing steel cables 6 are used for improving the strength of the combined connecting structure of the whole supporting composite structure, long strip plates 4 are arranged between the first U-shaped steel 1 and the tunnel and between the second U-shaped steel 2 and the tunnel, the long strip plates 4 are equidistantly distributed outside the first U-shaped steel 1 and the second U-shaped steel 2, long slat 4 is far away from tunnel inner wall one side fixedly connected with fixed column 71, fixed column 71 is far away from long slat 4 one end and is connected with arc piece 72, arc piece 72 open end is towards consolidating steel cable 6, the distance between arc piece 72 and the consolidating steel cable 6 is less than the outside maximum distance that expands of U shaped steel frame 10 both sides wall, the biggest deformation value of first U shaped steel 1 and second U shaped steel 2 both sides wall promptly, the pressure that can effectively prevent first U shaped steel 1 to receive is too big like this, exceed first U shaped steel 1 and the biggest deformation value of second U shaped steel 2, directly lead to the rupture of first U shaped steel 1 both sides wall or unable reseing, make first U shaped steel 1 and second U shaped steel 2 lose or reduce its shock-absorbing capacity.

When the device is used, the acting force of the tunnel is transmitted to the second U-shaped steel 2 by the strip plate 4, the two side walls of the second U-shaped steel 2 are deformed under pressure, the received confining pressure is absorbed and slowly released, the strip plate 4 can also move along with the deformation of the two side walls of the second U-shaped steel 2 in the process of the deformation of the two side walls of the second U-shaped steel 2, meanwhile, the strip plate 4 drives the fixing column 71 to move, the fixing column 71 drives the arc block 72 to move towards the reinforced steel cable 6, when the two side walls of the second U-shaped steel 2 are about to reach the maximum deformation value, the arc block 72 is in close contact with the reinforced steel cable 6, the confining pressure is transmitted to the reinforced steel cable 6 through the fixing column 71 and the arc block 72, at the moment, the reinforced steel cable 6 plays a role of improving the strength of the whole supporting composite structure combined connection structure, the confined pressure can be transferred and distributed to the first U-shaped steel 1, and the situation that the acting force received by the second U-shaped steel 2 exceeds the maximum deformation value of the two side walls is avoided, the life of second U shaped steel has been promoted, has wholly promoted the performance that the composite construction of strutting bore high confined pressure simultaneously, reduces the risk that the country rock collapses, and first U shaped steel 1 receives confined pressure when too big, shifts the dispersion to second U shaped steel 2 with the confined pressure with the same reason.

Referring to fig. 1, angle plates 5 are respectively arranged on the inner side and the outer side of the joint of the first U-shaped steel 1 and the second U-shaped steel 2, and the first U-shaped steel 1 and the second U-shaped steel 2 are connected together by the two angle plates 5 through bolts and nuts, so that the first U-shaped steel 1 and the second U-shaped steel 2 can be conveniently assembled.

Referring to fig. 2, a rubber pad 73 is disposed inside the arc block 72 to prevent the arc block 72 from directly contacting the reinforced cable 6, so as to reduce the abrasion of the arc block 72 to the reinforced cable 6.

Referring to fig. 3 and 4, a telescopic column 74 is additionally installed between the fixed column 71 and the arc block 72, a movable cavity 75 is formed at one end of the fixed column 71 close to the arc block 72, an installation cavity 76 communicated with the movable cavity 75 is formed inside the movable cavity 75, a spring 77 is arranged in the installation cavity 76, one end of the telescopic column 74 extends into the movable cavity 75 and is connected with the spring 77, the telescopic column 74 can move in the movable cavity 75, and the distance between one end of the telescopic column 74, far away from the arc block 72, and the opening end of the installation cavity 76 is also smaller than the maximum distance between the two side walls of the U-shaped steel frame 10 which expand outwards.

During the use, provide the holding power for flexible post 74 by spring 77 for arc piece 72 pastes all the time and consolidates 6 surfaces of steel cable, moves when rectangular board 4 moves along with the deformation of 2 both sides walls of second U shaped steel, can guarantee that arc piece 72 can not misplace with consolidating 6 steel cables, guarantees to consolidate 6 effective load and the transmission of steel cable, and the country rock pressure share that will receive is walked, and the country rock pressure share that will receive further ensures composite construction's effect and safety construction.

Referring to fig. 4 and 5, the cleaning ring 8 is embedded in the opening end of the movable cavity 75, the cleaning bristles 81 are connected to the inside of the cleaning ring 8 at equal intervals, and the free ends of the cleaning bristles 81 are in contact with the outer surface of the telescopic column 74, so that when the telescopic column is used, dust adsorbed on the outer surface of the telescopic column 74 is swept away by the cleaning bristles 81, the dust is prevented from entering the mounting cavity 76, and the telescopic column 74 is ensured to move smoothly in the mounting cavity 76.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a buffering energy-absorbing support composite construction, includes U shaped steel frame (10), U shaped steel frame (10) includes first U shaped steel (1) and second U shaped steel (2), first U shaped steel (1) fixed connection is in second U shaped steel (2) bottom both sides, two the bottom is connected with bottom plate (3) between first U shaped steel (1), first U shaped steel (1) and second U shaped steel (2) open face all towards the tunnel inner wall, set up in first U shaped steel (1) and second U shaped steel (2) and consolidate steel cable (6), consolidate steel cable (6) end to end and form tunnel cross sectional shape, consolidate steel cable (6) and be used for promoting whole support composite construction built-up connection structural strength, all be provided with rectangular board (4) between first U shaped steel (1) and the tunnel and between second U shaped steel (2) and the tunnel, the method is characterized in that: keep away from tunnel inner wall one side fixedly connected with protection machanism in rectangular board (4), protection machanism keeps away from rectangular board (4) one end and consolidates steel cable (6), protection machanism keeps away from rectangular board (4) one end and consolidates the maximum distance that the distance between steel cable (6) is less than the outside expansion of U shaped steel frame (10) both sides wall.

2. The energy-absorbing support composite structure according to claim 1, wherein: protection machanism includes fixed column (71), fixed column (71) fixed connection keeps away from tunnel inner wall one side in rectangular board (4), fixed column (71) are kept away from rectangular board (4) one end and are connected with arc piece (72), arc piece (72) open end orientation is consolidated steel cable (6), the distance between arc piece (72) and the consolidation steel cable (6) is less than the outside maximum distance that expands of U shaped steel frame (10) both sides wall.

3. The energy-absorbing support composite structure according to claim 2, wherein: the shape of the second U-shaped steel (2) is consistent with that of the top surface of the tunnel.

4. The energy-absorbing support composite structure according to claim 3, wherein: the long strip plates (4) are distributed on the outer side of the first U-shaped steel (1) and the outer side of the second U-shaped steel (2) at equal intervals.

5. The energy-absorbing support composite structure according to claim 1, wherein: the inner side and the outer side of the joint of the first U-shaped steel (1) and the second U-shaped steel (2) are respectively provided with an angle plate (5), and the first U-shaped steel (1) and the second U-shaped steel (2) are connected together through bolts and nuts by the angle plates (5).

6. The energy-absorbing support composite structure according to claim 2, wherein: the inner side of the arc-shaped block (72) is provided with a rubber pad (73).

7. The energy-absorbing support composite structure of claim 6, wherein: install flexible post (74) additional between fixed column (71) and arc piece (72), activity chamber (75) are seted up to fixed column (71) one end near arc piece (72), activity chamber (75) inboard seted up rather than the installation cavity (76) that link up each other, be equipped with spring (77) in installation cavity (76), flexible post (74) one end extends to and is connected with spring (77) in activity chamber (75), flexible post (74) can remove in activity chamber (75).

8. The energy-absorbing support composite structure according to claim 7, wherein: the distance between one end, far away from the arc-shaped block (72), of the telescopic column (74) and the opening end of the mounting cavity (76) is also smaller than the maximum distance of outward expansion of the two side walls of the first U-shaped steel (1).

9. The energy-absorbing support composite structure of claim 8, wherein: the opening end of the movable cavity (75) is embedded into the cleaning ring (8), the cleaning bristles (81) are connected to the inside of the cleaning ring (8) in an equal annular distance mode, and the free ends of the cleaning bristles (81) are in contact with the outer surface of the telescopic column (74).