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A cuttable material for reinforcing tunnel openings

A technology for cutting and reinforcing materials, which is applied in the direction of tunnels, tunnel linings, shaft equipment, etc., can solve the problems of prolonging the project period, reducing construction efficiency, and the shield machine cannot directly cut the portal, so as to speed up the construction progress and reduce the construction cost. Steps, performance easy effects

Inactive Publication Date: 2021-06-29
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the starting or receiving end of the shield tunneling method is mostly reinforced concrete structure, which makes the shield machine unable to cut the opening directly. Before the shield machine starts or receives, the reinforced concrete structure at the opening needs to be manually chiseled. , which greatly prolongs the project period and reduces the construction efficiency

Method used

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  • A cuttable material for reinforcing tunnel openings
  • A cuttable material for reinforcing tunnel openings
  • A cuttable material for reinforcing tunnel openings

Examples

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Effect test

preparation example Construction

[0032] The second aspect of the present invention provides the preparation method of the cuttable material described in the first aspect, the preparation method comprising the following steps: adding modified Portland cement and polyethylene fiber into the mold, stirring for a period of time and then standing for demoulding The reinforcement material for the opening of the shield tunnel is obtained.

[0033] Preferably, the mixing method of the modified Portland cement and polyethylene fiber is as follows:

[0034] After mixing material A with polyethylene fiber, add material B for mixing.

[0035] Preferably, the stirring time is 1 to 3 minutes.

[0036] According to the third aspect of the present invention, there is provided a reinforcement material for a shield tunnel entrance. The reinforcement material for a shield tunnel entrance includes the material that can be cut in the first aspect as the excavation area material of a shield machine.

[0037] Preferably, the rein...

Embodiment 1

[0042] In this embodiment, a reinforcement material for the entrance of a shield tunnel and a construction method are provided. The structure of the reinforcement material for the entrance of a shield tunnel is as follows: figure 1 As shown, the reinforcing material is arranged in strips at the tunnel entrance for reinforcing weak soil. The reinforcing material includes three parts: I-shaped cuttable material 5, I-shaped connector 6 and I-shaped steel. The I-shaped cuttable material 5 and the I-shaped steel are connected to form a strip through the I-shaped connector 6, such as figure 1 The arrangement shown, wherein the I-shaped cuttable material constitutes the reinforced area 2 of the I-shaped cuttable material. Simultaneously, the layout of the I-beam in the common I-beam reinforcement area outside the scope of the shield machine opening is completed, and concrete is poured in the I-beam gap 4. After the concrete reaches sufficient strength, the shield machine can directl...

Embodiment 2

[0049] The cuttable material 5 prepared in Example 1 was made into a test block and the mechanical properties of the material were tested, and the style of the test block was made according to the mechanical property test specification of FRP products. The short-term strength and final strength of the tested materials are shown in Table 1.

[0050] Compressive strength Mpa Tensile strengthMpa Shear strength Mpa Bending modulus Mpa proportion 8 hours 80 90 25 20000 1.8 8 days 140 160 50 38000 1.8

[0051] It can be seen from the data in Table 1 that the strength of the modified Portland cement material provided in Example 1 still shows a trend of gradually increasing after molding, and the strength can be doubled on the eighth day. This kind of material is easy to punch and connect with I-shaped steel parts at the beginning of forming. As the placement strength gradually increases, it is applied to the tunnel opening for support, whic...

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Abstract

The invention relates to a cuttable material for reinforcing tunnel openings, in particular to a reinforcing material for construction starting from a shield machine and reaching an end opening, a preparation method of the material and a construction method of the material. The reinforcement material consists of modified silicate-reinforced two-component materials A and B and polyethylene fibers, and the I-shaped material is prefabricated by mixing the modified silicate-reinforced materials A and B with polyethylene fibers , used for reinforcement when the shield machine enters the hole. The invention has the following advantages: 1. The strength of the material is high, which can meet the needs of hole reinforcement; 2. The material can be cut by the shield machine, reducing the construction steps of the shield machine into the hole, and improving the construction efficiency; 3. Cuttable material production and Easy to transport.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel construction reinforcement, and in particular relates to a cuttable material, a preparation method of the cuttable material, and a reinforcement material convenient for construction when a shield machine starts and reaches an end hole. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The shield method construction technology is an excellent tunnel mechanized construction method, which is widely used in the construction of urban tunnels. It can excavate the tunnel without affecting the normal traffic on the ground. The tunnel construction has a high degree of mechanization and the tunnel is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26E21D11/08
CPCC04B28/26C04B2201/50C04B2201/52E21D11/08C04B24/045C04B24/16C04B24/06C04B24/282C04B16/0625
Inventor 李树忱王修伟周鹏飞许孝滨王凯李阳万泽恩王曼灵王鹏程赵世森
Owner SHANDONG UNIV
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