Metro construction ground settlement monitoring point burying method

Abstract

The invention discloses a metro construction ground settlement monitoring point burying method. The method comprises steps as follows: 1, a core drill with a diameter of 50 to 80 mm is adopted to perform drilling to a designed depth, and a monitoring hole is obtained; 2, fine stone concrete is poured to the bottom of the monitoring hole; 3, a reinforced bar is vertically inserted in the monitoringhole along the medial axis, the bottom end is inserted in the fine stone concrete and the top end is close to the outlet position of the monitoring hole, and the top end of the reinforced bar is setto be a hemisphere protruding upward; 4, fine sand is poured into the monitoring hole to the position of placing a steel casing; and 5, fine sand is continuously poured into the monitoring hole untilto be close to the head hemisphere of the reinforced bar. In the case of core drilling by the method, a bit with one specification is only needed, one-time hole formation is achieved, the step of changing a bit is reduced, the bit with a small diameter is adopted, the core drilling difficulty is reduced, and the drilling speed is quickened.

Description

technical field [0001] The invention belongs to the technical field of subway construction, and in particular relates to an embedding method for monitoring points of surface settlement in subway construction. Background technique [0002] In the process of urban subway construction, regardless of the use of open cut, shallow buried underground excavation or shield construction, it is necessary to carry out settlement and other deformation monitoring of the surrounding environment such as the ground surface and buildings within the scope of influence to ensure the safety of the surrounding environment during construction. Urban pavement is generally concrete pavement. In order to accurately measure the ground settlement caused by subway construction, it is necessary to drill through the concrete pavement and bury the monitoring points in shallow soil. [0003] At present, the method of embedding the monitoring points of surface subsidence in China is as follows: first use a c...

AI Technical Summary

Problems solved by technology

The disadvantage is that it will cause great damage to the road surface, and a large number of holes with a diameter of 150mm will be drilled on the road surface, which will have a certain impact on the safety of groun

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