A polymer grouting reinforcement method for repairing water-rich bedrock tunnel pavement
A grouting reinforcement and polymer technology, applied in the field of tunnel engineering, can solve problems such as the deterioration of the stability of the tunnel structure, and achieve the effects of strong timeliness, shortened curing time, and obvious reinforcement effect.
Active Publication Date: 2022-06-28
山西交科岩土工程有限公司 +2
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Problems solved by technology
Scientific statistics show that more than 30% of tunnels in my country are water-rich bedrock tunnels, and more than 98% of water-rich bedrock tunnels will suffer from serious water damage after 10-15 years of operation, resulting in poor tunnel structure stability
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Embodiment 1
[0026] A polymer grouting reinforcement method for repairing water-rich bedrock tunnel pavement:
[0027] 1. Pavement disease detection of water-rich bedrock tunnels: The detection technology of road surface diseases of water-rich bedrock tunnels refers to the use of rapid tunnel detection vehicles to detect the height, crack width / length of pavement uplifts in water-rich bedrock tunnels to analyze the current status of tunnel diseases. Polymer composite grouting to repair tunnel pavement diseases.
[0028] 2. Preparation of polymer composite grouting material:
[0029] (1) Preparation of slag Portland cement single slurry: Mix P.O.42.5 slag Portland cement with water, wherein the water-cement ratio is 0.4:1, and stir for 30 minutes to obtain a single slurry.
[0030] (2) Preparation of polymer composite grouting liquid: the ratio of each raw material by mass is: 10 parts of P.O.42.5 slag Portland cement, 30 parts of polyether polyol, 13 parts of castor oil-based polyoxyethyl...
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Abstract
The invention discloses a high polymer grouting reinforcement method for repairing water-rich bedrock tunnel pavement, which comprises two parts: preparation of high polymer composite grouting material and grouting repair. The preparation of the polymer composite grouting material is divided into A component and B component. A component: mix P.O.42.5 slag portland cement with tap water according to the water-cement ratio of 0.4:1 and mix for 10-15min. During the stirring process, slowly Add 2000LM of polyether polyol and castor oil-based polyoxyethylene ether, and continue stirring for 5-10min; component B: stirring isocyanate PAPI and HDI, where PAPI:HDI=80:20. The rapid grouting repair technology of the present invention has short curing time, fast open traffic speed, convenient construction, good durability, and good permeability resistance, and can repair uplifts and cracks on the tunnel pavement, prevent tunnel water leakage damage, and contribute to the uplift and cracking of the tunnel pavement. , subsidence and other diseases provided technical support and guarantee.
Description
technical field [0001] The invention belongs to the technical field of tunnel engineering, and particularly relates to a polymer grouting reinforcement method for repairing the road surface of a water-rich bedrock tunnel, so as to repair the problems of uplift and cracking of the water-rich bedrock tunnel road surface. Background technique [0002] Water-rich bedrock tunnel refers to the tunnel body passing through the water-rich bedrock section. The groundwater is mainly bedrock fissure water, and the water level is high, which is easy to cause tunnel water diseases. Due to the complete development of fissure water in water-rich bedrock tunnels, extremely poor geological conditions, fluid and soft plastic surrounding rock, difficult construction and high risk level, in order to prevent large deformation and collapse during the construction of water-rich bedrock tunnels. , the foundation is often reinforced by high-pressure jetting piles, and waterproof and drainage measures...
Claims
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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2111/70C04B24/32C04B24/045
Inventor 吴天军周新星张艳聪李广谋温浩朱晓斌李晓强张宏武李子农房欣欣
Owner 山西交科岩土工程有限公司