Tunnel portal construction platform

Abstract

The utility model belongs to the technical field of tunnel construction, and particularly relates to a tunnel portal construction platform which comprises an inclined side slope, the side slope is connected with a plurality of layers of supporting assemblies, and the supporting assemblies are stacked in a layered mode in the inclined plane direction of the side slope. Each layer of supporting assembly comprises a layer of geogrid and a soil and stone layer formed on the geogrid in a filling mode, a ton bag is arranged on the geogrid on the outer side of the soil and stone layer, the geogrid is provided with an extending part, the extending part is folded back to cover the layer of supporting assembly and is pressed and covered by the upper layer of supporting assembly, a steel wire mesh is arranged on one side of the ton bag, and the steel wire mesh is arranged on the other side of the ton bag. According to the utility model, the ton bag and the geogrid are used for supporting, the plurality of supporting assemblies are used for constructing the construction platform, the geogrid has certain elasticity, a plurality of holes are formed in the geogrid, the overall stability is improved after filling, and the steel wire mesh is hung on the outer side of the ton bag, so that the construction efficiency is improved. Concrete is poured on the outer side of the steel wire mesh for reinforcement.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel opening construction platform. Background Art

[0002] When constructing a tunnel on a slope, it is necessary to set up a construction platform to facilitate the installation and manual excavation of the tunnel.

[0003] In the existing technology, the construction platform is built according to the height of the slope, the foundation is solidified with sleepers, the main frame is set up, and it is reinforced layer by layer. Finally, the branch bracket is set up to make it in good contact with the slope surface, and wooden boards are laid to form a platform and tied with wires. In this method, the connection between the wooden boards, sleeper pads and wires is not strong, and the overall structure will shake to a certain extent during construction, which affects the structure of the construction platform. The construction platform needs to be constantly repaired, wasting a lot of manpower and material resources.

[0004] Therefore, it is urgent to design a construction platform structure that can ensure the quality of the construction platform while improving the efficiency of construction. Utility Model Content

[0005] In view of the technical problems existing in the background technology, the purpose of the utility model is to provide a tunnel portal construction platform, which can ensure the quality of the construction platform while improving the efficiency during construction.

[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0007] A tunnel portal construction platform comprises an inclined slope, wherein the slope is connected to a plurality of layers of support assemblies, and the support assemblies are stacked in layers along the inclined surface of the slope, wherein each layer of support assemblies comprises a geogrid and a soil and rock layer formed on the geogrid, and a ton bag is arranged on the geogrid outside the soil and rock layer, and the geogrid is provided with an extension portion, which is folded back and covered on the support assembly of this layer and is pressed by the support assembly of the upper layer, and a wire mesh is arranged on one side of the ton bag, and a concrete layer is arranged on one side of the wire mesh.

[0008] Preferably, the extended portion of the geogrid is turned back by 2 m, and the concrete layer is made of ecological concrete with grass seeds and shrub seeds added therein.

[0009] Preferably, a plurality of I-beam assemblies are provided on one side of the ton bag, wherein the I-beam assemblies include I-beams, the I-beams are arranged in a triangular shape, and a retaining wall is provided on one side of the I-beam assembly.

[0010] Preferably, a fixing assembly is provided on one side of the slope, the fixing assembly comprising backfill soil and bamboo plywood, and the backfill soil and bamboo plywood are stacked in cross-layers.

[0011] The utility model has the following advantages and beneficial effects:

[0012] 1. In the utility model, ton bags and geogrids are used for support, and a number of support components are constructed into a construction platform. The geogrid has a certain elasticity, and there are a number of holes inside the geogrid, so the overall stability is increased after filling.

[0013] Second, in the utility model, a steel wire mesh is hung on the outside of the ton bag, and concrete is poured on the outside of the steel wire mesh for reinforcement, thereby increasing the structural stability of the construction platform.

[0014] 3. The utility model has the advantages of simple installation, low use and maintenance costs and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the connection of a tunnel portal construction platform provided by the utility model;

[0016] Figure 2 A structural diagram of an I-beam assembly of a tunnel portal construction platform provided by the utility model;

[0017] Figure 3 A schematic diagram of the connection of support components of a tunnel portal construction platform provided by the utility model;

[0018] Figure 4 A schematic diagram of another preferred connection mode of a tunnel portal construction platform provided by the utility model;

[0019] Icons: 1-ton bag, 2-geogrid, 21-extension, 22-soil and rock layer, 3-wire mesh, 4-concrete layer, 5-I-beam assembly, 51-I-beam, 6-retaining wall, 7-bamboo plywood, 8-backfill, A-slope. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example

[0023] A tunnel portal construction platform comprises an inclined slope A, the slope A is connected to a plurality of layers of support components, the support components are stacked in layers along the inclined surface direction of the slope A, each layer of support components comprises a geogrid 2 and a soil and rock layer 22 formed on the geogrid 2, a ton bag 1 is arranged on the geogrid 2 outside the soil and rock layer 22, the geogrid 2 is provided with an extension part 21, the extension part 21 is folded back and covered on the layer of support components, and is covered by the upper layer of support components, a wire mesh 3 is arranged on one side of the ton bag 1, and a concrete layer 4 is arranged on one side of the wire mesh 3.

[0024] As a preferred embodiment of the present invention, specifically:

[0025] like Figure 1 , 2 As shown in 3, fill soil and stone on the geogrid 2, fold back 2m on both sides of the extension 21 of the geogrid 2 and connect it to the slope A, the ton bag 1 is close to the extension 21 on the outside of the geogrid 2, and the slope A is close to the extension 21 on the inside of the geogrid 2. The ton bag 1 limits the movement of the geogrid 2, and the construction of the first layer of support components is completed. The geogrid 2 is placed on the first layer of support components and filled. After the two sides are folded back, the ton bag 1 is placed again for limiting, so that the first layer of support components and the second layer of support components are fixed, and the operation is repeated along the inclination direction of the slope to build. A construction platform is formed. After the construction is completed, the outer side of the ton bag 1 is connected to the wire mesh 3. A concrete layer 4 is poured on the wire mesh 3. The concrete layer 4 adopts ecological concrete with grass seeds and shrub seeds added therein to increase the water permeability and bearing capacity. An I-beam assembly 5 is arranged at the bottom of the slope and on the outer side of the ton bag 1. The I-beam assembly 5 includes an I-beam 51. The I-beam 51 is arranged in a triangle. Several I-beams 51 are inserted into the ground to enhance the stability of the bottom of the construction platform. A retaining wall 6 is arranged on one side of the I-beam assembly 5. The retaining wall 6 keeps a certain distance from the construction platform to increase the safety of the construction.

[0026] As another preferred embodiment of the present invention, specifically:

[0027] like Figure 4 As shown, a fixed component is provided on one side of the slope, and the fixed component includes backfill soil 8 and bamboo plywood 7. The backfill soil 8 and bamboo plywood 7 are stacked and laid in cross-layers, and the bottom of the construction platform is connected to the retaining wall 6. A number of I-beams 51 are inserted into the fixed component to enhance the stability of the construction platform.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel portal construction platform, comprising an inclined slope, characterized in that: The slope is connected to a plurality of layers of support components, and the support components are stacked in layers along the slope surface direction. Each layer of support components includes a geogrid and a soil and rock layer formed on the geogrid. A ton bag is arranged on the geogrid outside the soil and rock layer. The geogrid is provided with an extension portion, which is folded back and covered on the support component of the layer and is covered by the support component of the previous layer. A steel wire mesh (3) is arranged on one side of the steel wire mesh (3), and a concrete layer (4) is arranged on one side of the steel wire mesh (3).

2. A tunnel portal construction platform according to claim 1, characterized in that: The extended portion of the geogrid (2) is folded back by 2 m.

3. A tunnel portal construction platform according to claim 2, characterized in that: A plurality of I-beam assemblies (5) are arranged on one side of the ton bag (1), wherein the I-beam assemblies (5) include I-beams (51) arranged in a triangular shape, and a retaining wall (6) is arranged on one side of the I-beam assemblies (5).

4. A tunnel portal construction platform according to claim 3, characterized in that: A fixing component is arranged on one side of the slope, and the fixing component comprises backfill soil and bamboo plywood, and the backfill soil and bamboo plywood are stacked in a cross-layered manner.

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