Reinforcing method for shield underneath passing through underground street crossing channel

Abstract

The invention discloses a reinforcing method for shield underneath passing through an underground street crossing channel, and relates to the technical field of underground street crossing channel reinforcing. The reinforcing method aims to solve the problem that in the prior art, when a shield underneath passes through an existing underground street crossing channel, the safety of the existing underground street crossing channel and a shield tunneling machine during working cannot be guaranteed. According to the technical scheme, the method comprises the following steps that A, a steel support is erected in the existing channel by adopting a sectional construction method; B, grouting is carried out from the existing street crossing channel to the lower part, and a soil body through whichthe shield is about to pass is pre-reinforced; C, synchronous grouting control of the shield tunneling machine is conducted when the shield tunneling machine passes; and D, after the tail of the shield tunneling machine passes through the channel, grouting reinforcement is conducted again. According to the reinforcing method, by means of steel supporting, pre-reinforcement, synchronous grouting and re-grouting after shield tunneling, an existing underground channel crossed with a shield tunnel is reinforced, the reinforcing effect is good, the safety of the existing underground channel beforeand after shield tunneling is guaranteed, and meanwhile, a safety channel of the shield tunneling machine during shield tunneling is also guaranteed.

Description

technical field [0001] The invention relates to the technical field of reinforcement of underground street crossing passages, in particular to a reinforcement method for shield tunnels passing through underground street crossing passages. Background technique [0002] In urban shield tunneling, especially when the tunnel passes through the existing underground passageway, the shield machine has to pass under the existing passageway. Since the passageway crosses the shield tunnel, the distance is very close, and the existing street passageway is at the crossroad. At the entrance, there is a large amount of miscellaneous fill, non-original soil, non-compact geology, and easy settlement, which will affect the safe passage of the shield machine and the safety of the existing underground street crossing passage. It is necessary to reinforce the shield area before and after the shield, so we propose a reinforcement method for the shield to pass through the underground passageway. ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing underground street passage and the safety of the shield machine cannot be guaranteed when the shield tunnel passes through the existing underground passageway in the prior art, and a shield tunneling tunnel under the ground is proposed. Reinforcement method of crossing passage

Images