Water-rich sandy cobble stratum shield proximate sensitive building elaborative control construction method

Abstract

The invention discloses a water-rich sandy cobble stratum shield proximate sensitive building elaborative control construction method. The method includes the steps that S101, construction parametersof a shield machine are set so as to control the soil discharging amount, the pressure of a soil bin of the shield machine and the soil and water pressure of a tunneling face are equal so that the shield machine can be in soil and pressure balance state construction, the injection amount of a grouting body is calculated, the target injection amount of constant shield mud is calculated according toa shield clearance, and the target injection amount of cement slurry is calculated according to a tube clearance; and S102, in the tunneling process of the shield machine, the constant shield mud isinjected synchronously through radial holes in a front shield, the shield clearance is filled with the constant shield mud, the cement slurry is synchronously injected to the outer side of a tube piece ring disengaged out of a rear shield through a grouting hole in the rear shield, and the tube clearance is filled. By means of the water-rich sandy cobble stratum shield proximate sensitive buildingelaborative control construction method, ground surface settlement millimeter construction of water-rich sandy cobble stratum shield construction disturbance is achieved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a finely controlled construction method of a shield approaching a sensitive building in a water-rich sandy pebble stratum. Background technique [0002] In recent years, with the rapid advancement of urbanization, basic transportation and facilities construction activities have developed rapidly. In the construction of urban rail transit and municipal utility corridors, shield tunnels are widely used because of their outstanding features. However, due to the complexity of the underground environment and ground conditions, a large number of shield tunneling engineering problems emerge in endlessly. Among them, the disturbance effect of shield tunneling construction on the ground surface and adjacent buildings is unavoidable. In the case of unstable control of shield tunneling construction in special strata, it is very easy to cause problems such as surface subsidenc...

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Problems solved by technology

[0005] The fine control construction method of shield tunneling in water-rich sand and pebble stratum close to sensitive buildings provided by the present invention is to solve the construction disturbance in the construction process of existing shield tunneling in water-rich sand and pebble stratum close to sensitive buildings, which has a great impact on sensitive buildings. Technical problems with poor construction effect

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