Reinforcing structure and reinforcing method for surrounding stratum of shield and pipe-jacking tunnel

Abstract

The invention discloses a reinforcing structure and reinforcing method for a surrounding stratum of a shield and pipe-jacking tunnel. The reinforcing structure comprises a reinforcing pile and a connecting piece, the connecting piece is arranged in a pipe piece, the reinforcing pile is of a hollow structure, the reinforcing pile penetrates through the connecting piece to be driven into the surrounding stratum of the tunnel and is fixedly connected with the pipe piece through the connecting piece, grouting holes are formed in the pile wall of the reinforcing pile, and grouting is conducted on the surrounding stratum of the tunnel through the grouting holes. The reinforcing structure is constructed in the tunnel, is simple in structure and low in cost, is not limited by conditions such as ground traffic, pipelines and buildings, and is capable of guaranteeing the reinforcing effect and exerting the settlement reduction effect of a root pile composite foundation, so that the situation that normal operation of the tunnel is affected due to the fact that settlement of the later operation tunnel is increased and even the pipe piece is damaged due to the poor reinforcing effect of a soft foundation is avoided.

Description

technical field [0001] The invention relates to the field of shield tunneling and pipe-jacking tunnel engineering, in particular to a reinforcement structure and a reinforcement method for surrounding strata of shield tunneling and pipe-jacking tunnels. Background technique [0002] Shield and pipe jacking tunneling methods are currently the most widely used and most important engineering technologies in underground tunnel construction, which have the advantages of safety, speed, quality control and good construction environment. However, in the liquefied sand layer or soft soil layer, after the construction of the shield tunnel and pipe jacking tunnel, there is the problem of earthquake liquefaction, the settlement is relatively large during the operation period, and the time required to reach stability is also very long, and the settlement presents obvious The problem of inhomogeneity leads to operational safety problems in tunnels, and even endangers structural safety. At...

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Problems solved by technology

[0006] The purpose of the present invention is to solve a series of problems in the existing ground reinforcement technology around the tunnel, for example, the ground reinforcement method is limited by conditions such as ground transportation, pipelines, and demolition of buildings and structures, and it is difficult to implement and expensive in most cases; The grouting reinforcement in the tunnel damages the segment structure and cannot guarantee the reinforcement effect, and provides a reinforcement structure and reinforcement method for the surrounding strata of the shield tunnel and pipe jacking tunnel

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