Fine control construction method of shield tunneling in water-rich sand and pebble stratum close to sensitive buildings
A technology of fine control and construction method, which is applied in the direction of earth drilling, underground chamber, shaft equipment, etc., can solve the problems of poor construction effect, construction disturbance, and large influence of sensitive buildings, and achieve the solution of grouting cross flow slurry, control the deformation of the tunnel vault, and realize the effect of earth pressure balance control
Active Publication Date: 2021-09-28
CCFEB CIVIL ENG
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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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[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.
[0023] figure 1 It is a flow chart of the refinement control construction method of shield tunneling in water-rich sand and pebble stratum close to sensitive buildings in a preferred embodiment of the present invention; figure 2 It is a schematic diagram of shield excavation in a preferred embodiment of the present invention; image 3 It is a schematic diagram of the water-rich sand and pebble formation of the present invention.
[0024] Such as figure 1 with figure 2As shown, in the embodiment of the present invention, the shield in the water-rich sand and pebble stratum is close to the sensitive building refinement control construction method. The shield body 10 of the shield machine includes the front shield 11, the middle shield 12 and the The back shiel...
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Abstract
The invention discloses a finely controlled construction method for shield tunneling in water-rich sand and pebble stratum close to sensitive buildings, including: step S101, setting the construction parameters of the shield tunneling machine to control the amount of excavation, so that the pressure of the shield tunneling machine's soil bin and the excavation The soil and water pressure on the surface is equal, so that the shield machine is in the state of earth pressure balance for construction; calculate the injection volume of the grouting body: calculate the target injection volume of the shield mud according to the gap between the shield body, and calculate the target injection volume of the cement slurry according to the gap between the shell and the shell ; Step S102, during the tunneling process of the shield machine, synchronously inject balance shield mud through the radial holes on the front shield to fill the gap between the shield body, and synchronously inject cement slurry into the segment ring out of the back shield through the grouting holes on the back shield outside to fill the shell gap. The finely controlled construction method of shield tunneling in water-rich sand and pebble stratum close to sensitive buildings realizes millimeter-level control construction of ground subsidence disturbed by shield tunnel construction in water-rich sand and pebble stratum.
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...
Claims
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IPC IPC(8): E21D9/087E21D11/10C04B28/02C04B111/70
CPCC04B28/02C04B2111/00724C04B2111/70E21D9/087E21D11/10E21D9/0873C04B18/08C04B14/104C04B14/06
Inventor 肖洪波杨果林陈亚军张沛然吕涛戴志浩龙彪
Owner CCFEB CIVIL ENG