CN206570712U - The anti-collapse rock-fall assembled rubber energy dissipating plate safeguard structure in canopy cave cave top - Google Patents

Abstract

The roof of the shed is a collapsing and rock-falling assembled rubber energy-dissipating plate protective structure. The light energy-dissipating structure is composed of energy-dissipating blocks, and multiple energy-dissipating blocks are connected to form an energy-dissipating plate. There is a waterproof layer between the board and the roof of the tunnel, and the energy dissipation block is made of rubber material. The utility model utilizes the plasticity and easy assembly of the rubber material, which greatly reduces the construction difficulty and construction cost; in addition, the rubber material has good cushioning, deformation, and energy dissipation characteristics under the impact load, which increases the risk of falling rocks. The impact on the roof of the cave lasts, thereby effectively reducing the impact of falling rocks, ensuring the safety of the shed under the impact of falling rocks, reducing the thickness of the overlying cushion, and reducing the weight of the cave roof cushion, thereby bringing It has achieved good economic, environmental protection and disaster reduction benefits.

Description

Protective structure of prefabricated rubber energy dissipation board for anti-collapse and rockfall on roof of shed and cave

technical field

The invention relates to an anti-rockfall technology at the top of an open tunnel or a shed in a highway, in particular to a light energy-dissipating protective structure on the top of an open tunnel or a shed in a mountainous area, and belongs to the field of highway engineering.

Background technique

In the construction of highways and railways, the lines will inevitably pass through areas with severe rockfall disasters. In order to reduce the damage caused by landslides and rockfall to the lines, engineering prevention and control of rockfall disasters is required. At present, there are many methods to prevent and control rockfall on steep slopes, among which sheds are one of the most common and effective methods. In order to reduce the damage caused by falling rocks to the top of the shed, the traditional method is to backfill a certain thickness of plain fill on the top of the shed to play a certain buffering role. If it is less than 1.5 meters, the requirements for the support and bearing capacity of the bottom of the shed are relatively high, the project cost will increase, and the application effect will be poor. In addition, since the backfill soil layer will consolidate over time, when the soil layer is consolidated to a certain extent, its buffering effect on falling rocks will be reduced, and the buffering capacity will be reduced. For the purpose of reducing the load on the top of the shed and resisting rockfall, some sheds also add materials such as polystyrene geofoam board or geogrid when backfilling the top of the shed, but the implementation cost and construction difficulty are relatively large, and the impact resistance has no effect. limited.

Contents of the invention

The purpose of the present invention is to provide an assembled light-weight energy-dissipating plate protection structure for the roof of the shed, which can greatly reduce the load on the top of the shed, and can effectively maintain the buffer capacity of the roof of the shed against falling rocks, and solve the problem of the existing shed. There are technical problems such as heavy weight and poor impact resistance of the top backfill cushion layer.

The technical solution adopted by the present invention to solve the problems of the technologies described above is as follows:

The anti-collapse and rockfall roof of the shed is a protective structure of the assembled rubber energy-dissipating plate, which is characterized in that it is composed of energy-dissipating blocks, and the energy-dissipating blocks are connected to form an energy-dissipating plate. There is a waterproof layer between the roofs, and the energy dissipation blocks are made of rubber materials.

In the present invention, a layer of light energy-dissipating board assembled from rubber blocks is arranged on the top of the shed, which makes full use of the plasticity and easy assembly of the rubber material, and greatly reduces the construction difficulty and construction cost; It has better cushioning, deformation and energy dissipation characteristics under load, which increases the impact duration of falling rocks on the cave roof, thereby effectively reducing the impact force of falling rocks, ensuring the safety of the shed under the impact of falling rocks, and reducing the impact of falling rocks. The thickness of the overlying cushion layer reduces the self-weight of the cave roof cushion layer, thereby bringing good economic, environmental protection and disaster reduction benefits.

Preferably, the ultimate compressive strength of the energy dissipation block should not be less than 90MPa, the tensile strength at break should not be less than 150kPa, the elongation should be 100-800%, and the compression set and resilience should be good or above.

A further technical solution is that the shape of the energy dissipation block and the way it is assembled into an energy dissipation plate are as follows:

The energy dissipation block is in the shape of a cube, wherein four connection rings are made on the four longitudinal edges of the cube, and the four connection rings are at different heights, so as to facilitate the connection between the energy dissipation blocks. The energy-dissipating blocks are connected by pins to form an energy-dissipating board. The pins include long connecting pins and short connecting pins. The long connecting pins are used to connect four energy-dissipating blocks inside the energy-dissipating board, and the short connecting pins are used to connect two sides of the energy-dissipating board. An energy dissipation block, the long and short connecting pins are cylindrical in structure, a pin shaft is arranged at the lower end, and a round cover is arranged at the upper end.

The installation method of the energy dissipation board is as follows: fix the energy dissipation board on the roof of the shed, that is, use the pre-embedded bolts embedded in the four corners of the top of the shed to connect the connecting rings on the four corners of the energy dissipation board , and fix it on the roof of the cave. In order to increase the firmness of the connection between the energy dissipation board and the roof of the cave, special thickening treatment can be done on the edge connection rings of the energy dissipation blocks on the four corners of the energy dissipation board.

The key technology of the present invention is to replace the backfill soil layer with a light energy dissipation board made of rubber on the roof of the shed to form an easy-to-install protective cushion layer on the roof of the shed, which is suitable for the entrance and exit section of the shed where rockfall disasters occur frequently.

The beneficial effects of the present invention are: compared with the existing roof protection structure of the shed, the structure has lighter self-weight and can effectively reduce the load on the roof of the shed; When the energy dissipation board is partially damaged, it is easy to replace it. In addition, since the material of the energy-dissipating board is an elastic medium, the energy-dissipating board can absorb the impact energy of falling rocks through elasto-plastic deformation, prolong the impact duration of falling rocks, and effectively increase the cushioning capacity of the cushion under rockfall disasters. It is calculated that when a rockfall of 0.5m ³ impacts the tunnel protection structure at a speed of 20m/s, compared with the traditional soil cushion, the impact force of the rockfall can be reduced by 2.8 times and the impact duration can be extended by 2 times. In addition, the material of the energy dissipation block is rubber, which can be factory-produced, customized, and directly assembled and laid on the roof of the cave; no need to use large-scale machinery and equipment during shipment, which can effectively shorten the construction period and save construction costs.

Description of drawings

Fig. 1 is a top view of the energy dissipation board structure of the present invention.

Fig. 2 is a front view of the energy dissipation block of the present invention.

Fig. 3 is the right side view of the energy dissipation block of the present invention.

Fig. 4 is a top view of the energy dissipation block of the present invention.

Figure 5 is a schematic diagram of the connection structure of four energy dissipation blocks.

Fig. 6 is a three-dimensional schematic view of the short connecting pin.

Fig. 7 is a three-dimensional schematic view of the long connecting pin.

Fig. 8 is a schematic diagram of the section II-II of the energy dissipation panel structure of the present invention, showing the connection mode between the energy dissipation blocks inside the energy dissipation panel.

FIG. 9 is an enlarged view of A in FIG. 8 .

Fig. 10 is a schematic cross-sectional view of the structure I-I of the energy dissipation plate of the present invention, showing the connection mode between energy dissipation blocks on the sides of the energy dissipation plate.

FIG. 11 is an enlarged view of B in FIG. 10 .

In the figure: 1. Column of the shed; 2. Longitudinal beam of the shed; 3. Roof of the shed; 4. Waterproof layer; 5. Cylindrical rubber plug; 6. Energy dissipation block; 61. The first connecting ring, 62. The second connecting ring, 63, the third connecting ring, 64, the fourth connecting ring, 7, embedded bolts, 8, short connecting pins, 9, long connecting pins.

detailed description

The following is a further description of the protective structure of the assembled light-duty energy dissipation board of the present invention in conjunction with the accompanying drawings and specific embodiments:

Accompanying drawing 1 is the top view of the structure of the energy dissipation board composed of a plurality of energy dissipation blocks 6. It can be seen from Fig. 1 that the energy dissipation board is composed of a plurality of energy dissipation blocks 6 arranged vertically and horizontally. The ring, long and short connecting pins 9 and 8 connect the energy dissipation block as a whole, and the whole energy dissipation plate is fixed on its upper part by the pre-embedded bolt 7 embedded in the cave roof. In order to protect the bolt, a cylindrical rubber plug 5 is placed at the installation position of the bolt to block the joint of the energy dissipation block, thus forming a light energy dissipation plate protection structure on the top of the shed. The structure has good integrity and cushioning capacity, is easy to install and convenient to construct, can effectively reduce the load on the top of the shed, and is suitable for the protection of the top of the shed with a large span.

Accompanying drawing 2, Fig. 3, Fig. 4 show the structure of energy dissipation block 6 from three angles, energy dissipation block 6 is a cube, and the four edges of energy dissipation block 6 in the longitudinal direction make a 1/4 circular groove type, and in the The four 1/4 circular grooves of the four edges of the energy block are provided with a first connecting ring 61, a second connecting ring 62, a third connecting ring 63 and a fourth connecting ring 64, and there is a The four connection rings on the energy dissipation block are arranged at different heights in the middle of the energy dissipation block, according to the first connection ring 61, the second connection ring 62, the third connection ring 63 and the fourth connection ring The order of the rings 64 is from high to low, assuming that the thickness of the connecting ring is D, and starting from the second connecting ring 62, each connecting ring is successively lowered by a height D, so that the energy dissipation blocks are connected to each other. When the blocks are assembled together, the connecting rings overlap at the intersections of the longitudinal edges to form a circular pin hole, and the center of the circular pin hole is located on the edge.

The energy dissipation block is made of rubber material with a density of 0.93-0.94g/cm ³ , the ultimate compressive strength should not be less than 90MPa, the tensile strength at break should not be less than 150kPa, the elongation rate should be 100-800%, and the compression set should be above good , the resilience should be above good. When the volume of rockfall is 0.5m ³ and the speed of the impact protection structure is 20m/s, the thickness of the energy dissipation block should not be less than 50cm. Set according to the actual working conditions, in order to meet the actual engineering requirements, two sizes are preferably used, namely 25cm and 50cm.

Accompanying drawing 5 is a schematic structural diagram of four energy dissipation blocks forming an energy dissipation plate. The four energy dissipation blocks 6 are assembled according to the method shown in FIG. 64 are stacked up and down together, insert the long connecting pin 9 into the four connecting rings, and then turn the pin 180° to connect the energy dissipation block 6 to the inside; the two connecting rings on the sides of the energy dissipation board overlap together up and down, Use the short connecting pin 8 to connect the sides of the energy dissipation board.

Accompanying drawing 6, Fig. 7 is the three-dimensional schematic diagram of short, long connecting pin, because there are two kinds of connection modes between energy dissipating block 6 in the present invention, namely side connection mode and internal connection mode, use short connection pin 8 when side connection , use the long connection pin 9 for the internal connection, the specific connection method is as shown in Figure 4 and Figure 5. In order to facilitate the assembly between the energy dissipation blocks 6 during construction, two positioning small round holes are arranged on the top of the bolt. The latch is made of common rubber material.

Accompanying drawing 8 shows the schematic diagram of the II-II cross-section of the energy dissipation plate structure of the present invention and the connection mode between the energy dissipation blocks in the middle. It can be seen from the figure that the connecting rings of the four energy dissipation blocks inside the energy dissipation plate Connecting bolt 9 is fixed. In order to ensure that the connecting rings are not easy to be crushed, rubber gaskets can be added between the rings.

Accompanying drawing 9 is the schematic diagram of section I-I of the energy-dissipating plate structure of the present invention and the connection method between side energy-dissipating blocks. The two energy-dissipating blocks are overlapped by rings and fixed with short connecting pins 8 .

It can be seen from the accompanying drawings 1 and the accompanying drawings that there is a gap with a width of 2D between the two connecting rings 61 and 64 on the left side of the attached drawing 1, and an annular rubber gasket with a thickness of 2D is placed in the gap during installation. , and connect with long connection bolt 9 again.

Claims (3)

1. the anti-collapse rock-fall assembled rubber energy dissipating plate safeguard structure in canopy cave cave top, it is characterised in that be made up of energy dissipating block (6), more Individual energy dissipating block connection composition energy dissipating plate, energy dissipating plate is fixed at the top of canopy cave, waterproof layer, energy dissipating are provided between energy dissipating plate and cave top Block is made by elastomeric material.

2. the anti-collapse rock-fall assembled rubber energy dissipating plate safeguard structure in canopy cave cave top according to claim 1, its feature exists In：Energy dissipating block (6) is cubic shaped, and four connection annulus, and four connections are made on four seamed edges of cube longitudinal direction Annulus is in different height, in order to the connection between energy dissipating block, is connected energy dissipating block using latch and is constituted energy dissipating plate, latch Including long connecting bolt (9) and short connecting bolt (8), long connecting bolt (9) is used to connect four energy dissipating blocks in energy dissipating intralamellar part, Short connecting bolt (8) is used to connect the energy dissipating block of energy dissipating edges of boards side two, and long and short connecting bolt is cylinder, and its lower end has one There is a dome bearing pin, its upper end.

3. the anti-collapse rock-fall assembled rubber energy dissipating plate safeguard structure in canopy cave cave top according to claim 2, its feature exists In：Four ribs on energy dissipating block (6) longitudinal direction make 1/4 circular groove type, and the is set at four 1/4 circular grooves of four seamed edges of energy dissipating block In one connection annulus (61), the second connection annulus (62), the 3rd connection annulus (63) and the 4th connection annulus (64), connection annulus Portion has four connection annulus on a bar hole, energy dissipating block to be set at the middle part of energy dissipating block by different height, justifies by the first connection Ring (61), second connection annulus (62), the 3rd connection annulus (63), the 4th connection annulus (64) order from high to low, if even The thickness for connecing annulus is D, and each connection annulus reduces a height D successively since the second connection annulus (62), in order to disappear It can be connected with each other between block, when energy dissipating block is fitted together, one is overlapped in the longitudinal seamed edge intersection connection annulus of energy dissipating block Rise and form barrel band hole, the center of circle in barrel band hole is located on seamed edge.