CN210238325U

CN210238325U - Rectangular open cut tunnel resistant to falling stone impact

Info

Publication number: CN210238325U
Application number: CN201921013653.8U
Authority: CN
Inventors: Song Yuan; 袁松; Liangpu Li; 黎良仆; Guoqiang Zheng; 郑国强
Original assignee: Sichuan Communication Surveying and Design Institute Co Ltd
Current assignee: Sichuan Communication Surveying and Design Institute Co Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-04-03
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses an anti rectangular open cut tunnel that falls stone and assault, including the open cut tunnel body, the open cut tunnel body includes bottom plate, roof and connects the curb plate in both sides between bottom plate and roof, the roof upper surface transversely is provided with several reinforcing rib, vertically is provided with several contact rib, and reinforcing rib encloses into a plurality of buffer cavity with the contact rib on the roof, and the buffer cavity bottom surface is backfilled with the rubble bed course, lays the buffer layer on the rubble bed course, and the buffer layer top covers there is backfill soil, has seted up the outlet bottom reinforcing rib and/or contact rib. According to the rectangular open cut tunnel, the top plate is ribbed in the orthogonal direction, so that the bending rigidity of the top plate in two directions can be increased, the tensile stress at the bottom is reduced, the impact resistance of the top plate is improved, the consumption of concrete is reduced, and the cost is saved.

Description

Rectangular open cut tunnel resistant to falling stone impact

Technical Field

The utility model relates to a road traffic safety protection facility field, concretely relates to rectangle open cut tunnel of anti falling stone impact.

Background

In recent years, after geological disasters such as violent earthquakes and high-level collapse occur in mountainous areas for many times, the rush-to-walk and the traffic-securing of mountainous area highways particularly under complex terrain conditions become life line projects. Practice proves that the construction of the reinforced concrete open cut tunnel is a preferred choice from the aspect of the bearing capacity of the open cut tunnel structure or the requirement on the bearing capacity of the foundation.

The places for building open cut tunnels are mountainous roads, and the size of the impact energy level of falling rocks is a difficult problem to overcome, wherein the problems of falling rocks such as motion tracks, collision and falling rocks decomposition are involved. At present, in order to improve the open cut tunnel protection energy level, the common method is to increase the thickness of a top plate of the open cut tunnel and add reinforcing steel bars; the method is feasible, but the investment is increased, the self weight is increased, and the overall anti-seismic performance of the open cut tunnel is poorer.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses an anti rectangular open cut tunnel that falling rocks was strikeed, this rectangular open cut tunnel can enough increase the bending stiffness of two directions of roof through ribbing according to the orthogonal direction at the roof, reduces bottom tensile stress to reduce the concrete volume of using when improving roof shock resistance, practice thrift the cost.

The utility model discloses a following technical scheme realizes:

the rectangular open cut tunnel comprises an open cut tunnel body, wherein the open cut tunnel body comprises a bottom plate, a top plate and side plates connected to two sides of the bottom plate and the top plate, a plurality of reinforcing rib plates are transversely arranged on the upper surface of the top plate, a plurality of contact rib plates are longitudinally arranged, the reinforcing rib plates and the contact rib plates are enclosed into a plurality of buffer cavities on the top plate, a gravel cushion is backfilled on the bottom surface of each buffer cavity, a buffer layer is paved on the gravel cushion, backfill soil covers the top of the buffer layer, and water drainage holes are formed in the bottom of the reinforcing rib plates and/or the bottom of the contact rib plates.

The utility model discloses in, set up the reinforcing floor and the contact floor of quadrature on the roof of open cut tunnel body, reinforcing open cut tunnel roof is horizontal and vertical ascending bending stiffness, reduce bottom tensile stress, and reduce the concrete use amount when improving roof shock resistance, save the cost, the reinforcing floor encloses into a plurality of buffer cavities with the contact floor on the roof, the buffer cavity bottom surface is backfilled there is the rubble bed course, the outlet has been seted up bottom reinforcing floor and/or contact floor, the rubble bed course does benefit to the flow of rainwater and discharges from the outlet, the buffer layer of rubble bed course top can cushion the rock fall, the impact force bending stiffness of further reinforcing roof, the buffer layer top covers there is backfill soil, backfill soil also possesses the buffer capacity to a certain extent.

Further, the reinforcing rib plate and the connection rib plate are cast in situ with the top plate of the open cut tunnel body into a whole, and the reinforcing rib plate and the connection rib plate are perpendicular to each other and are intersected.

Furthermore, the thickness of the reinforcing rib plate and the connecting rib plate is 50-80cm, the height of the connecting rib plate at the outer side far away from the mountain is 1.2-1.5 m, and the height of the other connecting rib plates and the reinforcing rib plates is 0.8-1 m.

The utility model discloses in, the outside contact floor height of keeping away from the massif is greater than all the other floors, therefore this contact floor can with roof, form a backfill space between the massif, will backfill soil and fill in this space, is showing the shock resistance who has increased roof, towards the curb plate of massif, promotes the security performance of open cut tunnel.

Furthermore, the thickness of the gravel cushion layer is 10-20cm, the thickness of the buffer layer is 60-70cm, and the backfill covers the gap between the outer connection rib plate and the mountain body.

Further, the buffer layer is EPE, EPS or waste tire, the number of the reinforcing rib plates is 3-4, and the number of the connecting rib plates is 3.

Furthermore, the distance between the reinforcing rib plates is 350-450 cm, and the distance between the connection rib plates is 450-550 cm.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model relates to an anti rectangular open cut tunnel that rock falls assaults sets up orthogonal reinforcement floor and connection floor on the roof of open cut tunnel body, reinforcing open cut tunnel roof is horizontal and vertical bending rigidity, reduce bottom tensile stress, and reduce the concrete use amount when improving roof shock resistance, save cost, reinforcement floor encloses into a plurality of buffer chambers with the connection floor on the roof, buffer chamber bottom surface is backfilled and is had the rubble bed course, seted up the outlet at reinforcement floor and/or connection floor bottom, the rubble bed course does benefit to the flow of rainwater and discharges from the outlet, the buffer layer above the rubble bed course can cushion the rock fall impact force, further strengthen the bending rigidity of roof, the buffer layer top covers there is backfill, backfill also possesses the buffer capacity to a certain extent;

2. the utility model relates to an anti rectangular open cut tunnel that falling rocks was strikeed, the outside contact floor height of keeping away from the massif is greater than all the other floors, therefore this contact floor can with roof, form a backfill space between the massif, will backfill fill in this space, is showing the shock resistance who has increased roof, towards the curb plate of massif, promotes the security performance in open cut tunnel.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic transverse cross-section of the present invention.

Reference numbers and corresponding part names in the drawings:

the open cut tunnel comprises a 1-open cut tunnel body, 11-bottom plates, 12-top plates, 13-side plates, 2-reinforcing rib plates, 3-connection rib plates, 4-buffer cavities, 41-gravel cushion layers, 42-buffer layers, 43-backfill soil, 5-water drainage holes and 6-mountain bodies.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1

As shown in fig. 1 and 2, the utility model relates to a rectangle open cut tunnel of anti falling rocks impact, including open cut tunnel body 1, open cut tunnel body 1 includes bottom plate 11, roof 12 and connects the curb plate 13 in both sides between bottom plate 11 and roof 12, roof 12 upper surface transversely is provided with several reinforcing rib 2, vertically is provided with several contact rib 3, and reinforcing rib 2 encloses into a plurality of buffer cavity 4 with contact rib 3 on roof 12, and buffer cavity 4 is backfilled with rubble bed course 41 in the bottom surface, lays buffer layer 42 on rubble bed course 41, and buffer layer 42 top covers there is backfill soil 43, has seted up outlet 5 in reinforcing rib 2 and/or contact rib 3 bottom.

Further, the reinforcing rib plate 2 and the connection rib plate 3 are cast in place with the top plate 12 of the open cut tunnel body 1 into a whole, and the reinforcing rib plate 2 and the connection rib plate 3 are perpendicular to each other and intersect with each other.

Further, the thickness of the reinforcing rib plate 2 and the connecting rib plate 3 is 50-80cm, the height of the connecting rib plate 3 at the outer side far away from the mountain body 6 is 1.2-1.5 m, and the height of the other connecting rib plates 3 and the reinforcing rib plate 2 is 0.8-1 m.

Further, the thickness of the gravel cushion layer 41 is 10-20cm, the thickness of the buffer layer 42 is 60-70cm, and the backfill soil 43 covers the gap between the outer connection rib plate 3 and the mountain body 6.

Further, the buffer layer 42 is EPE, EPS or waste tire, the number of the reinforcing ribs 2 is 3-4, and the number of the connecting ribs 3 is 3.

Further, the distance between the reinforcing rib plates 2 is 350-450 cm, and the distance between the connection rib plates 3 is 450-550 cm.

Example 2

Further, the thickness of the reinforcement rib 2 and the connection rib 3 is 60cm, the height of the connection rib 3 at the outer side far away from the mountain 6 is 1.2m, and the height of the rest of the connection ribs 3 and the reinforcement rib 2 is 0.8 m.

Further, the thickness of the gravel cushion layer 41 is 15cm, the thickness of the buffer layer 42 is 70cm, and the backfill soil 43 covers the gap between the outer connection rib plate 3 and the mountain body 6.

Further, the interval between the reinforcing ribs 2 is 400cm, and the interval between the connecting ribs 3 is 500 cm.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The rectangular open cut tunnel capable of resisting falling rock impact comprises an open cut tunnel body (1), wherein the open cut tunnel body (1) comprises a bottom plate (11), a top plate (12) and side plates (13) connected to two sides between the bottom plate (11) and the top plate (12), and is characterized in that a plurality of reinforcing rib plates (2) are transversely arranged on the upper surface of the top plate (12), a plurality of connecting rib plates (3) are longitudinally arranged, the reinforcing rib plates (2) and the connecting rib plates (3) are enclosed into a plurality of buffer cavities (4) on the top plate (12), a broken rock cushion layer (41) is backfilled on the bottom surface of each buffer cavity (4), a buffer layer (42) is paved on each broken rock cushion layer (41), backfilling soil (43) covers the top of each buffer layer (42), and water drainage holes (5) are formed in the bottoms of the reinforcing rib plates (2.

2. A rectangular open cut tunnel resistant to falling rock impact according to claim 1, characterized in that the reinforcing floor (2) and the connection floor (3) are cast in situ with the top plate (12) of the open cut tunnel body (1) as a whole, and the reinforcing floor (2) and the connection floor (3) are perpendicular to each other and intersect.

3. The rectangular open cut tunnel capable of resisting falling rock impact according to claim 1, wherein the thickness of the reinforcing rib (2) and the connecting rib (3) is 50-80cm, the height of the connecting rib (3) on the outer side far away from the mountain body (6) is 1.2-1.5 m, and the heights of the remaining connecting ribs (3) and the reinforcing rib (2) are 0.8-1 m.

4. A falling rock impact resistant rectangular open cut tunnel according to claim 3, characterized in that the gravel cushion (41) is 10-20cm thick and the buffer layer (42) is 60-70cm thick, and the backfill (43) covers the gap between the outer tie rib (3) and the mountain (6).

5. A falling rock impact resistant rectangular open cut tunnel according to claim 1, characterized in that the breaker (42) is EPE, EPS or junked tire, the reinforcement ribs (2) are 3-4, and the tie ribs (3) are 3.

6. A falling rock impact resistant rectangular open cut tunnel according to claim 1, characterized in that the spacing between the reinforcing ribs (2) is 350-450 cm, and the spacing between the tie ribs (3) is 450-550 cm.