Reinforcement method for existing underground structures

Abstract

Provided is a method for reinforcing an existing underground structure that can reinforce an existing underground shelter by a chemical solution injection method and effectively utilize the existing underground structure as an underground shelter by reinforcing the existing underground structure. 【Solution means】The method for reinforcing the existing underground structure 11 according to the present invention is to reinforce the ground 1 on the outer peripheral part of the existing underground structure 11 by a chemical solution injection method, and form a buffer body 12 made of a reinforced ground on the outer peripheral part of the existing underground structure 11, thereby enhancing the durability against energy acting from the outside and / or the shielding property against radiation. Further, if the existing underground structure 11 is an existing underground shelter, a buffer body 12 made of a reinforced ground is formed by injecting a chemical solution on the outer peripheral part of the underground shelter, and for example, the durability, strength, and safety as an underground shelter can be improved against incoming ballistic missiles.

Claims

1. A method for reinforcing an existing underground structure, which enhances durability against external energy and / or shielding against radiation by reinforcing the ground around the periphery of an existing underground structure, such as an existing tunnel, subway station, underground shopping mall, or underground passage, using a chemical injection method to form a buffer body made of reinforced ground around the periphery of the existing underground structure, characterized in that the range and strength of the buffer body are designed to be strong and in a range capable of withstanding an anticipated explosion energy.

2. 2. The method for reinforcing an existing underground structure according to claim 1, further comprising the step of converting the explosion energy into earthquake energy to calculate the range and strength of the buffer body.

3. 2. The method for reinforcing an existing underground structure according to claim 1, further comprising the step of converting the explosion energy into a blast pressure to calculate the range and strength of the buffer body.

4. A method for reinforcing an existing underground structure according to claim 1, 2 or 3, characterized in that a chemical solution containing clay as the main material and containing added radiation shielding material is used as the chemical solution for forming the buffer body.

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