High 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, obvious reinforcement effect, and shortened curing time.
Active Publication Date: 2021-02-26
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 the pavement of a water-rich bedrock tunnel:
[0027]1. Water-rich bed rock tunnel pavement disease detection: The water-rich bed rock tunnel pavement disease detection technology refers to the use of a tunnel rapid inspection vehicle to detect the height of the water-rich bed rock tunnel pavement uplift and the width / length of the crack to analyze the current situation of the tunnel disease. Polymer composite grouting repairs tunnel pavement diseases.
[0028]2. Preparation of polymer composite grouting material:
[0029](1) Preparation of slag Portland cement single slurry: P.O.42.5 slag Portland cement is mixed with water, wherein the water-cement ratio is 0.4:1, and the mixture is stirred for 30 minutes to obtain a single slurry.
[0030](2) Preparation of high polymer composite grouting liquid: The ratio of each raw material in parts by mass is: 10 parts PO42.5 slag Portland cement, 30 parts polyether polyol, 13 parts castor oil-b...
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The invention discloses a high polymer grouting reinforcement method for repairing a water-rich bedrock tunnel pavement. The high polymer grouting reinforcement method comprises two parts of preparation of a high polymer composite grouting material and grouting repair. The high polymer composite grouting material is prepared from a component A and a component B. The component A is prepared by thefollowing steps: stirring and mixing P.O.42.5 slag portland cement and tap water according to a water-cement ratio of 0.4:1 for 10-15 minutes, slowly adding 2000 LM of polyether polyol and castor oil-based polyoxyethylene ether in the stirring process, and continuously stirring the components for 5-10 minutes; and the component B is prepared by stirring isocyanate PAPI and HDI, wherein the ratio of PAPI to HDI is 80:20. The rapid grouting repair technology is short in curing time, high in traffic opening speed, convenient and fast to construct, good in durability and good in permeation resistance, tunnel pavement heaves and cracks can be repaired, damage of tunnel leakage water is prevented, and technical support and guarantee are provided for tunnel pavement heaves, cracks, sedimentationand other diseases.
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 pavement of a water-rich base rock tunnel, so as to repair the problems of uplift and cracking of the pavement of the water-rich base rock tunnel.Background technique[0002]The 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 form tunnel water diseases. Due to the well-developed fissure water of the water-rich bedrock tunnel, the geological conditions are extremely poor, the surrounding rock is soft and plastic, the construction is difficult, and the risk level is high, in order to prevent large deformation and collapse during the construction of the water-rich bedrock tunnel , High-pressure jet grouting piles are often used to reinforce the foundation, and take waterp...
Claims
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Login to View More 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