Life-cycle treatment method of water inrush in tunnel

Abstract

The invention discloses a life-cycle treatment method of water inrush in a tunnel. The method comprises the steps that three-dimensional morphologic features of a water conductive structure of a water inrush zone in the tunnel are obtained by combining geological data, excavation data, detection results of comprehensive geophysical detection and numerical calculation results; grouting sealing water inrush is taken into account, surrounding rock physical mechanical parameters are improved simultaneously, design of a treatment scheme is conducted on the water inrush zone in the tunnel, and design of a keyhole and a drainage keyhole is conducted according to a water inrush main controlling structure; the stability of the tunnel in the construction period and the safety in the operation period are guaranteed by conducting numerical simulation on the tunnel section which is reinforced according to the design scheme; grouting construction is conducted according to the design scheme, a monitoring device is buried during the construction process, and feedback optimal design is implemented; inspection is conducted on the treatment effect of the grouting reinforcement section in the tunnel, and the excavation time is determined. According to the life-cycle treatment method of the water inrush in the tunnel, it is guaranteed that the surrounding rock in the tunnel construction period is stale and water inrush of the tunnel does not occur in the operation period, the chronic problem that nine of the ten tunnels leak is completely eradicated, and the effective treatment of the water inrush in the tunnel and the environmental protection are achieved.

Description

technical field [0001] The invention relates to a full-life-cycle treatment method for tunnel water inrush, which belongs to the field of transportation safety engineering. Background technique [0002] With the gradual improvement of my country's highway, railway and urban underground transportation systems, a large number of transportation tunnels have been put into construction and operation. During the construction process, they often pass through areas with complex terrain, landforms and geological conditions. During the construction process, it is easy to cause major projects such as landslides and water inrush. Disasters, leading to frequent water inrush disasters during the construction period. After the construction is completed, due to the effect of groundwater and adverse geological effects, the tunnel often faces the problem of water leakage during the operation period, which reduces the service life of the tunnel and threatens the safety of transportation. Casual...

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Problems solved by technology

[0005] 1. It cannot ensure the stability of the surrounding rock during the tunnel excavation during the construction period, and cannot guarantee that the surrounding rock of the tunnel will not leak under the action of underground water pressure and seepage during the operation period, resulting in unsafe factors in the actual use of the tunnel

[0006] 2. Due to the lack of consideration of the time factor, after the treatment of water inrush in the tunnel, water leakage and even water inrush will occur every one or two years, resulting in the need for frequent and repeated renovation of the tunnel, which consumes a lot of manpower, material resources, and and financial resources

[0007] 3. Frequent routine repairs during the operation of the tunnel have brought great inconvenience to the users of the tunnel

[0008] 4. Due to the tunnel repair caused by the uncertainty of the water inrush risk during the operation of the tunnel, it is impossible to make an accurate budget for the operating cost of the tunnel at the design stage of the tunnel. For the entire life cycle of the tunnel, the cost cannot be achieved control

[0009] 5. Only consider solving the current water inrush problem, but fail to consider the overall optimal planning of the entire life cycle of the tunnel construction period and operation period, and do not consider the needs of surrounding rock stability and groundwater breakdown prevention during the long-term operation of the tunnel

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