Super soft soil foundation plastic drainage board disposable pile shoe anchoring method

Abstract

The invention provides a method for anchoring plastic drainage board disposable pile shoe in super soft soil foundation, including the following steps: a disposable pile shoe is made; the duckbilled outlet at the bottom of a sleeve is taken as a clamping opening of the disposable pile shoe; a plastic drainage board is penetrated into the sleeve and comes out from the duckbilled outlet at the bottom of the sleeve, thus coming out the 150mm-long plastic drainage board remained by the outlet; the remained plastic drainage board is reflexed and is penetrated into the duckbilled outlet at the bottom of the sleeve; the disposable pile shoe is inserted into a gap formed by the reflexed plastic drainage board; and the plastic drainage board outside the top of the sleeve is utilized to pull the plastic drainage board outside the duckbilled outlet, so that the disposable pile shoe is embedded into the duckbilled outlet and the plastic drainage board is firmly fixed. The invention has the effects that disposable pile shoe anchoring method is adopted, anchoring problem of plastic drainage board in muddy soil can be solved, success rate and rewinding control are good, and plastic drainage board construction in soft foundation treatment engineering can be ensured to success, thus providing technical support for success of shallow foundation stabilization.

Description

technical field [0001] The invention provides a one-time spud shoe anchoring method for plastic drainage boards on ultra-soft soil foundations, which is suitable for laying plastic drainage boards in dredging and filling muddy super-soft foundations in coastal areas to solve the problem that drainage boards cannot be anchored in super-soft foundations. Background technique [0002] With the development and development of coastal areas, land reclamation projects along the coast have increased accordingly. Most of the coastal areas are filled with dredging silt foundations. The vacuum preloading method of inserting plastic drainage boards into the soft foundation is one of the main methods to deal with this soft foundation. . Laying the plastic drainage board is the key process, and the anchorage of the plastic drainage board in the ground requires laying in the base layer in a plastic state. When plastic drainage boards are inserted in the muddy ultra-soft base, it often hap...

AI Technical Summary

Problems solved by technology

[0003] When vacuum preloading is used for soft foundation reinforcement, the anchorage depth of plastic drainage boards directly affects the depth of foundation reinforcement. In ultra-soft foundations, if plastic drainage boards are installed, there will be problems such as bandback and drainage boards cannot be anchored

The conventional method is to drill the plastic drainage board to the swamp sedimentary soil layer of about -14m, and use the friction between the soil and the plastic drainage board to make the spud can bounce off, and the plastic drainage board can be anchored in the soil at the design depth Medium; but when the soil within the design depth range is ultra-soft, such as marine sedimentary soil layer, the soil is silt and in a flow-plastic state, and the conventional construction method cannot anchor the plastic drainage board within the design depth

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