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Self-filling concrete for railway tunnel lining

A concrete and self-filling technology, which is applied in the field of railway tunnel lining structures and self-filling concrete, can solve problems such as insufficient durability and lining quality defects, and achieve the effects of improving robustness, reducing cracking risks, and reducing segregation

Inactive Publication Date: 2020-05-19
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the special structure of the tunnel lining and the characteristics of construction conditions, in order to overcome the above problems, the intelligent power of the concrete material itself is used to solve the problems of quality defects and insufficient durability of the lining caused by construction factors.

Method used

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  • Self-filling concrete for railway tunnel lining
  • Self-filling concrete for railway tunnel lining
  • Self-filling concrete for railway tunnel lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: The design strength of the tunnel lining self-filling concrete is C30. The concrete mix ratio used is shown in Table 1. The main properties of the tunnel lining self-filling concrete measured in the laboratory are shown in Table 2. The field application and later inspection of the tunnel lining self-filling concrete The situation is shown in Table 3.

[0034] gelling component Viscosity Adjusting Components aggregate water reducing component mixing water 360 1.5 1877 4.0 150

[0035] project Slump spread Vibration spread Gas content Vibration U-shaped instrument filling height difference Penetration depth Initial setting time final setting time 56d compressive strength 28d electric flux performance 530mm 580m 2.5% 40mm 5mm 8:50 10:45 38.5 MPa 940C

[0036] Table 3 On-site application and later detection of self-filling concrete for C30 tunnel lining

[0037]

Embodiment 2

[0038] Example 2: The design strength of the tunnel lining self-filling concrete is C40. The concrete mix ratio used is shown in Table 4. The main properties of the tunnel lining self-filling concrete measured in the laboratory are shown in Table 5. The field application and later inspection of the tunnel lining self-filling concrete The situation is shown in Table 6.

[0039] gelling component Viscosity Adjusting Components aggregate water reducing component mixing water 450 1.0 1796 4.5 156

[0040] project Slump spread Vibration spread Gas content Vibration U-shaped instrument filling height difference Penetration depth Initial setting time final setting time 56d compressive strength Impermeability grade 28d electric flux performance 520mm 580m 3.1% 30mm 4mm 9:10 11:10 50.7 MPa P12 820C

[0041] Table 6 Field application and post-test of self-filling concrete for C40 tunnel lining

[0042] ...

Embodiment 3

[0043] Example 3: The design strength of the tunnel lining self-filling concrete is C50. The concrete mix ratio used is shown in Table 7. The main properties of the tunnel lining self-filling concrete measured in the laboratory are shown in Table 8. The field application and later inspection of the tunnel lining self-filling concrete The situation is shown in Table 9.

[0044] gelling component Viscosity Adjusting Components Anti-crack component Hydration temperature rise inhibiting component aggregate water reducing component mixing water 460 0.7 43 87 1666 6.5 150

[0045] Remarks: The composition of the anti-cracking component is 40kg / m 3 Expansion agent and 3 kg / m 3 fiber composition.

[0046] project Slump spread Vibration spread Gas content Vibration U-shaped instrument filling height difference Penetration depth Initial setting time final setting time 56d compressive strength Impermeability grade 28d elect...

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Abstract

The invention belongs to the field of building materials, and particularly relates to self-filling concrete for railway tunnel lining, wherein the self-filling concrete is prepared by stirring a gelling component, an anti-cracking component, a viscosity adjusting component, a hydration temperature rise inhibiting component, an anti-corrosion component, an anti-freezing component, a water reducingcomponent, aggregate and water in a forced stirrer according to a certain ratio. According to the invention, the concrete has the performance characteristics of excellent self-filling property, gap trafficability, dynamic stability, high robustness, cracking resistance and the like under the action of micro-vibration, is suitable for railway tunnel lining structures, and is also suitable for the fields of highway tunnels, water conservancy tunnels, underground engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-filling concrete used for railway tunnel lining, which is suitable for railway tunnel lining structures, and is also suitable for road tunnels, water conservancy tunnels and underground engineering fields. Background technique [0002] Composite lining is mostly used in railway engineering tunnel structures in my country. The characteristics of composite tunnel structure are: complex geological environment, curved surface structure and narrow construction operation space, and the lining concrete has a large flow resistance in the closed mold cavity, resulting in inverts that are not densely poured. or honeycomb dog hole; when the concrete is poured, the drop is large and the flow distance is long (more than 6m), resulting in insufficient strength or large discreteness of the concrete due to poor dynamic stability; the waterproof board with thermal insu...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/141C04B18/08C04B18/146C04B14/106C04B14/047C04B14/02C04B14/06C04B14/068C04B18/12C04B2103/302C04B2103/601C04B2103/67C04B2103/44C04B24/24C04B16/0633C04B16/0658C04B16/0641C04B14/44C04B24/10C04B24/126C04B24/124
Inventor 李化建黄法礼易忠来王振靳昊温浩谢永江
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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