Method for constructing liquified discarded soil in construction of subaqueous structure

Abstract

The invention relates to a method for constructing liquified discarded soil in the construction of a subaqueous structure, which comprises the following steps: (1) manufacturing a structure with a bottom plate or a fence; (2) installing a vibrator or a high-pressure water or high-pressure gas spraying device at the lower part of the bottom plate or the fence of the structure; (3) generating vibration by the vibrator installed at the lower part of the bottom plate or the fence, or spraying out a high-pressure water column or gas by the high-pressure water or high-pressure gas spraying device and liquifying a soil layer within a sinkage range of the structure; and (4) installing a slurry discharge pipe on the bottom plate of the structure in a way of penetrating through the bottom plate, installing high-pressure gas spraying devices at the lower part and the middle part of the slurry discharge pipe, discharging slurry under the function of high-pressure gas sprayed by the high-pressure gas spraying devices and enabling the structure to continuously sink. The construction of constructing a large bridge foundation, a subaqueous tank body, a subaqueous bunker, a caisson of a gravity type wharf or a revetment, a sand filling or rubble tipping embankment of sea filling cofferdam engineering, a caisson or a rubble tipping embankment of a bulwark or a jetty and the like is safe, the cost is lowered, and the construction period is shortened.

Description

technical field [0001] The invention relates to a liquefied spoil construction method for constructing underwater structures. Under the condition of soft soil or sandy soil underwater, the construction of bridge foundation, underwater tank, underwater bunker, gravity wharf or caisson for revetment, sand filling of sea reclamation cofferdam project or construction of riprap berm, This technology is applicable to the construction of caisson or riprap embankments of breakwaters or diversion dikes. Background technique [0002] Construction of bridge foundations, underwater tanks, underwater bunkers, caissons for gravity wharves or revetments, sand filling or riprap for reclamation cofferdams all over the world in soft soil or sandy soil conditions of rivers, rivers and seas The construction of caisson or riprap embankments of berms, breakwaters or diversion dikes is becoming more and more common, and the scale is getting larger and larger. It can be seen that it is very urgent...

AI Technical Summary

Problems solved by technology

Due to the excavation of the foundation pit, the balance of the soil is destroyed, and soil landslides are prone to occur, resulting in the destruction of surrounding buildings; when the foundation pit is excavated under the geological conditions of underwater soft soil or sandy soil, in order to stabilize the slope, excavation The amount of work is extremely large, resulting in high construction costs and long construction periods; after the excavation of the foundation pit, there will be silting at the bottom and incomplete dredging, resulting in a weak interlayer at the bottom, leaving hidden dangers of landslide accidents

[0005] 3. For underwater reclamation of cofferdams, the traditional construction method uses riprap to squeeze silt in addition to excavating foundation pits. The obvious disadvantage of this method of riprap silt is that the bottom layer will As the soil is squeezed away, it will continue to expand, resulting in a large amount of stone and high cost; there will also be a weak interlayer at the bottom of the riprap embankment, and the completed cofferdam will have a landslide accident hazard

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