A waterproof single-layer lining structure suitable for four-level surrounding rock double-track track and its manufacturing method

A waterproof, surrounding rock technology, applied in tunnel lining, wellbore lining, tunnel, etc., can solve the problems of difficult maintenance of waterproof system ring and longitudinal drainage system, difficult to guarantee waterproof effect, and unfavorable rapid tunnel construction, etc. Participate in the effect of good flexural strength performance, small thickness and reducing construction pollution

Active Publication Date: 2021-09-28
中铁科学研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the design of the bearing mechanism of the composite lining is reasonable, there are still many problems in its application: ① The secondary lining is constructed after the deformation of the surrounding rock is basically stable. In theory, it does not bear the load and is only used as a safety reserve. Improvement; ②Composite lining is completed by multiple constructions such as anchor shotcrete support, composite waterproof board, and secondary molded concrete. There are many steps and a long time, which is not conducive to the rapid construction of the tunnel
③The waterproof effect is difficult to guarantee
Once the drainage system is blocked, the secondary lining will bear the water pressure, the structural safety will be reduced, and it will easily cause leakage
And the leakage treatment is difficult and the effect is poor; ④ It is difficult to maintain the leaking waterproof system (construction joints, etc.) and the blocked ring longitudinal drainage system

Method used

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  • A waterproof single-layer lining structure suitable for four-level surrounding rock double-track track and its manufacturing method
  • A waterproof single-layer lining structure suitable for four-level surrounding rock double-track track and its manufacturing method
  • A waterproof single-layer lining structure suitable for four-level surrounding rock double-track track and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like figure 1 and image 3 As shown, a waterproof single-layer lining structure suitable for the double-track track in the fourth-grade surrounding rock. After excavation, the fourth-grade surrounding rock is subjected to smooth blasting, the top is chiseled to remove dangerous stones, the grouting is performed in advance, and the Ω-shaped spring is laid. Drainage half-pipe, install anchor rod, anchor rod is divided into horizontal anchor rod and longitudinal anchor rod, clean the rock surface, spray the first layer of coarse fiber concrete and curing, spray mortar and curing, spray waterproof and curing, spray the second layer of fine fiber Concrete and maintenance; that is, from the contact boundary with the rock, the surrounding rock structure is coarse fiber concrete layer 2, mortar layer 3, waterproof layer 4, fine fiber concrete layer 5, and building boundary 6.

[0041] For the smooth surface blasting, the residual eye mark rate should not be less than 80%, and ...

Embodiment 2

[0051] like figure 2 As shown, a method for making a waterproof single-layer lining structure suitable for four-level surrounding rock double-track tracks includes the following steps:

[0052] (1) Smooth surface blasting is carried out for grade IV surrounding rock. Control the blasting intensity, generally at 1.5cm. For buildings that are sensitive to the blasting vibration velocity after evaluation, control according to the evaluation results. If necessary, adopt mechanical excavation or static blasting; take seismic isolation measures and use "weak blasting" technology to control vibration Speed ​​up, minimize the distance between the peripheral eyes, and control the dosage.

[0053] (2) After blasting and slag removal, it is necessary to carry out roof search operations to clean up dangerous rocks on the top and side walls to ensure site safety;

[0054] (3) The main purpose of advanced grouting is to strengthen the surrounding rock, ensure the safety of construction a...

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Abstract

The invention discloses a waterproof single-layer lining structure suitable for a four-level surrounding rock double-track track. The bolt on the Ⅳ-level surrounding rock, the bolt is perpendicular to the rock surface of the Ⅳ-level surrounding rock; wherein, the rock surface of the Ⅳ-level surrounding rock is also washed, sprayed with the first layer of coarse fiber concrete and Curing, spray mortar and curing, spray waterproofing and curing, spray the second layer of fine fiber concrete and curing. The invention relates to a waterproof single-layer lining structure suitable for grade IV surrounding rock double-track tunnels. The single-layer lining structure formed by this technology is uniformly stressed, has a certain ability to resist deformation, and has simple construction technology and construction period. Short, reduce construction pollution, low-carbon and environmental protection, widely used in the lining structure of grade IV surrounding rock double-track tunnel engineering.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a waterproof single-layer lining structure suitable for four-level surrounding rock double-track tracks and a manufacturing method thereof. Background technique [0002] At present, composite lining structures are mostly used in subway surrounding rock support projects. The structural form is: primary support (spray anchor) + waterproof layer (roll material) + secondary lining (formed concrete). The support principle is: primary support The support and the surrounding rock form a unified force-bearing whole, which is the main load-bearing structure, and the secondary lining is used as a safety reserve. Plain concrete is generally used, and reinforced concrete can be used under special working conditions. Although the design of the bearing mechanism of the composite lining is reasonable, there are still many problems in its application: ① The secondary lini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/38
CPCE21D9/006E21D11/10E21D11/107E21D11/38
Inventor 温书亿李刚严金秀赵强李德明李祥东邓一三詹谷益徐志彬
Owner 中铁科学研究院有限公司
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