CN112796400A

CN112796400A - Integrated rainwater transverse ditch structure for tunnel portal

Info

Publication number: CN112796400A
Application number: CN202110158369.5A
Authority: CN
Inventors: 严中; 张兴其; 夏兴兵; 徐锋; 卜永刚
Original assignee: Hefei Municipal Design And Research Institute Co ltd
Current assignee: Hefei Municipal Design And Research Institute Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-05-14

Abstract

The invention discloses an integrated rainwater transverse ditch structure for a tunnel portal, wherein first concrete layers are respectively arranged on two sides of the transverse ditch, first connecting ribs are arranged on the first concrete layers and anchored into a concrete floor, a notch is formed in the top of each first concrete layer, a rainwater grate is arranged at the notch, second connecting ribs are reserved at the notch of each first concrete layer, and the first concrete layers are fixedly connected with the rainwater grates through the second connecting ribs. The invention not only improves the wear resistance of the concrete at the two sides of the transverse ditch and prevents rolling damage, but also the side wall plays a good role in supporting and blocking the pavement structure layers at the two sides and prevents the local damage of the pavement structure layer at the section; the phenomenon of vehicle jumping at the position of the transverse ditch is effectively reduced, the driving comfort is enhanced, meanwhile, the damage of the transverse ditch is reduced, and the operation management and maintenance are facilitated.

Description

Integrated rainwater transverse ditch structure for tunnel portal

Technical Field

The invention relates to the technical field of rainwater transverse ditches, in particular to an integrated rainwater transverse ditch structure for a tunnel portal.

Background

With the rapid development of modern cities, limited by objective conditions of development space, city planning, landscape environment and the like, more and more underpass tunnels are built, rainwater transverse ditches are arranged at tunnel openings to prevent rainwater outside the tunnels from entering the tunnels, so that the requirements of the principle of high water drainage and low water drainage are met, the possibility that the lowest point of the tunnels is submerged during rainstorm is reduced, and the safety of tunnel operation is ensured.

In order to prevent rainwater outside a tunnel from entering the tunnel, a common method in engineering is to arrange a rainwater transverse ditch at a tunnel opening, wherein the common transverse ditch is mainly formed by arranging a rainwater grate on a constructed road surface and fixing the rainwater grate by adopting common bolts. This kind of way can cause the entrance to a cave phenomenon of jumping a car usually, reduces the travelling comfort of driving, rolls the rainwater grate fixing bolt and transversal slot mouth at the repetition of wheel simultaneously and extremely fragile, needs frequent maintenance, is unfavorable for later stage operation management and nourishes.

The person skilled in the art is dedicated to solving the above technical drawbacks.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, a technical object of the present invention is to solve the problems mentioned in the above-mentioned background art.

In order to achieve the technical purpose, the invention provides an integrated rainwater transverse ditch structure for a tunnel portal, wherein first concrete layers are respectively arranged on two sides of the transverse ditch, first connecting ribs are arranged on the first concrete layers and anchored into a concrete bottom plate, a notch is formed in the top of each first concrete layer, a rainwater grate is arranged at the notch, second connecting ribs are reserved at the notch of each first concrete layer, and the first concrete layers are fixedly connected with the rainwater grates through the second connecting ribs.

Preferably, a second concrete layer is arranged in the notch.

Preferably, the first concrete layer and the second concrete layer are both made of steel fiber concrete.

The invention has the beneficial effects that:

due to the structural design, the wear resistance of concrete on two sides of the transverse ditch is improved, rolling damage is prevented, and meanwhile, the side walls play a good role in supporting and blocking the pavement structure layers on two sides, so that the local damage of the pavement structure layer on the section is prevented; the phenomenon of vehicle jumping at the position of the transverse ditch is effectively reduced, the driving comfort is enhanced, meanwhile, the damage of the transverse ditch is reduced, and the operation management and maintenance are facilitated.

Drawings

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

fig. 2 is an enlarged schematic view of a part of the structure in fig. 1.

Fig. 3 is a schematic structural view of the rainwater grate in the present invention.

In the figure: 1 first concrete layer, 2 concrete bottom plates, 3 first connecting ribs, 4 notches, 5 second connecting ribs, 6 second concrete layers, 7 rainwater grates, 8 base layers, 9 pavement layers and 10 reinforcing steel bar meshes.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Example (b):

as shown in fig. 1-3, in the integrated rainwater transverse ditch structure for the tunnel portal, a first concrete layer 1 with the width of 60cm and made of C40 steel fiber concrete is respectively poured on two sides of the transverse ditch, a first connecting rib 3 is arranged on the first concrete layer 1, the first connecting rib 3 is anchored into a concrete bottom plate 2, a notch 4 is arranged at the top of the first concrete layer 1, an integrated rainwater grate 7 is arranged at the notch 4, a second connecting rib 5 is reserved at the notch 4 of the first concrete layer 1, the first concrete layer 1 is welded with toes of the rainwater grate 7 through the second connecting rib 5, and the notch 4 is internally backfilled and compacted by a second concrete layer 6 made of steel fiber concrete, so that the phenomenon of vehicle jumping at the transverse ditch is effectively reduced, and the driving comfort is enhanced; meanwhile, the damage to the transverse ditch is reduced, and the operation and management are facilitated.

Specifically, the first concrete layers 1 which are 60cm wide and made of C40 steel fiber concrete are respectively poured on the two sides of the transverse ditch, so that the wear resistance of the concrete on the two sides of the transverse ditch is improved, and rolling damage is prevented. Meanwhile, the side walls play a good role in supporting and blocking the base layers 8 and the pavement layers 9 on the two sides, and local damage to the pavement structure layer of the section is prevented.

Specifically, a reinforcing mesh 10 is arranged in the transverse ditch and used for filtering sundries attached to rainwater.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a transversal ditch structure of tunnel entrance to a cave integration rainwater which characterized in that: the rainwater grate comprises a transverse ditch, and is characterized in that first concrete layers (1) are arranged on two sides of the transverse ditch respectively, first connecting ribs (3) are arranged on the first concrete layers (1), the first connecting ribs (3) are anchored into a concrete bottom plate (2), a notch (4) is formed in the top of each first concrete layer (1), a rainwater grate (7) is arranged at the notch (4), second connecting ribs (5) are reserved at the notch (4) of each first concrete layer (1), and the first concrete layers (1) are fixedly connected with the rainwater grate (7) through the second connecting ribs (5).

2. The tunnel portal integrated rainwater transverse ditch structure according to claim 1, characterized in that: and a second concrete layer (6) is arranged in the notch (4).

3. The tunnel portal integrated rainwater transverse ditch structure according to claim 2, characterized in that: the first concrete layer (1) and the second concrete layer (6) are both made of steel fiber concrete.