Method for reinforcing service channel of water-enriched soft soil ground layer below building

Abstract

The invention belongs to the technical field of service channels, and particularly relates to a method for reinforcing a service channel of a water-enriched soft soil ground layer below a building. The method comprises the following steps: (1) drilling an excavated section of the service channel to form a plurality of freezing channels penetrating through the service channel, and installing a freezing station; (2) installing freezing pipes in the freezing channels to start the freezing, and after temperature is measured, actively freezing the service channel and maintaining the freezing. The method is low in cost, saves labor, and is safe and efficient.

Description

technical field [0001] The invention belongs to the technical field of communication channels, and in particular relates to a method for reinforcing communication channels in water-rich soft ground below buildings. Background technique [0002] In urban rail projects, a communication channel is usually designed for the left and right lines of the section as an escape emergency communication channel, and the construction method of the channel is usually constructed by the underground excavation method. Compared with mountain tunnels, the strata of connecting passages are generally V-level or even VI-level surrounding rocks, and the strength of the soil layer is low, so the risk of underground excavation is high. Therefore, before excavation, the ground reinforcement method is usually used to strengthen the soil in the excavation area, and the excavation will be carried out after the strength of the soil layer and the anti-seepage coefficient reach a certain value. [0003] S...

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Problems solved by technology

[0003] Since the construction sites of urban rail projects are mostly in densely built areas, there are buildings on the upper part of the excavation point of the communication channel, and the ground is changing rapidly. When the ground soil is soft and rich in water, the conventional ground reinforcement method cannot guarantee the construction process of underground excavation. The subsidence of the medium surface will affect the buildings on the overlying surface, and there may be soil collapse accidents. In addition, the existing method of excavating the communication channel needs to excavate from the section of the communication channel, first excavating the top of the communication channel. Excavate the lower part of the connecting channel, because the space above the connecting channel is small, manpower excavation is required, which greatly lengthens the construction period and labor cost, so the existing technology needs further improvement

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