3results about How to "Reduce post-construction settlement" patented technology

The invention discloses a reinforcing structure and a reinforcing method for a shield tunnel, a first jet grouting pile group comprises a plurality of first jet grouting piles, part of structures of the first jet grouting piles are located above the shield tunnel, and the other part of structures of the first jet grouting piles are located on the side of the shield tunnel; the supporting pile set comprises first supporting piles and second supporting piles, the first supporting piles are located below the shield tunnel, the second supporting piles are located below the shield tunnel, and the second supporting piles are arranged on the two sides of the first supporting piles. Therefore, the partial structure of the first jet grouting pile is located above the shield tunnel, and the first supporting pile and the second supporting pile are both located below the shield tunnel, so that reinforcing combination of an upper soil body and a lower soil body of the shield tunnel can be achieved, soil body deformation in the shield tunnel construction process is effectively controlled, the stability of the excavation face of the shield tunnel is improved, and the construction efficiency of the shield tunnel is improved. After-construction settlement of the shield tunnel is reduced, the construction quality of the shield tunnel is improved, the long-term use performance of the shield tunnel is guaranteed, and the reinforcing structure is convenient to construct and low in construction difficulty.

The invention discloses a construction method for reinforcing a soft soil foundation by combining an electroosmosis vacuum preloading method with a cement mixing pile, which belongs to the technical field of building construction and comprises the following steps: S1, foundation pretreatment and survey lofting: leveling and cleaning a soft soil foundation site to be treated, and then performing survey lofting according to a design drawing, the inserting position of the electro-osmosis drainage plate and the pile position of the cement mixing pile are calibrated; s2, shallow layer electro-osmosis vacuum preloading method construction is conducted, specifically, a plurality of electro-osmosis drainage plates are inserted in a shallow layer foundation area according to the designed interval and arrangement form; connecting the inserted electroosmosis drainage plates to a polarity-switchable direct-current power supply system through wires, and electrifying according to a preset program so as to form electroosmosis flow in the soil body; meanwhile, the electroosmosis drainage plate is connected with a vacuum pump system through a water collecting pipe, negative pressure is formed under the sealing film laid on the earth surface, and vacuum preloading is carried out; through the combined effect of electroosmosis and vacuum preloading, drainage consolidation of shallow soft soil is accelerated, and a solidified hard shell layer is formed on the earth surface.

A kind of ground treatment structure for the new and old filling interface area of airport pavement influence area belongs to ground structure technical field.The structure includes geogrid, over-excavation replacement layer, slope step, reinforcing step and filling layer, 2-4m over-excavation replacement layer is set on the top surface of original filling body, slope step is set on the slope of original filling body, the width of slope step is not less than 2m, one layer of reinforcing step is filled on the outside of every two slope steps, filling layer is filled outside reinforcing step again, the top of filling layer is filled to the same elevation as the top of over-excavation replacement layer, geogrid is laid on the interface of original filling body and filling layer top surface, the laying width of geogrid on filling layer and original filling body is 10-15m, and new pavement is built on the top surface of over-excavation replacement layer and filling layer.The structure improves the overall stability and reliability of new pavement foundation, reduces post-construction settlement and uneven settlement, and ensures the safety of upper pavement structure.