Pile sinking technology of high-pressure jet pile extractor

Abstract

The invention discloses a pile sinking technology of a high-pressure jet pile extractor. The technology comprises the following specific steps that firstly, a slurry collecting sedimentation tank is dug; secondly, the high-pressure jet pile extractor is hoisted, and the pile extractor is vertically placed in the middle of a pile casing; thirdly, a water supply jet system is started; fourthly, jet water supply is stopped, the pile extractor is lifted out at the same time, and hole forming is completed; fifthly, a pipe pile is hoisted into a hole for pile sinking, and after the top of the pile sinks to a designed position, earth filling is conducted for fixing the pile, a lifting tool is released, and pile sinking is completed. Soil plugs in the pile body are removed through water jet by means of the technology, pile sinking friction resistance is reduced, a soil body at the end of the pile is disturbed, the strength of a soil layer is reduced, the construction difficulty of a high-compression soil layer can be effectively solved, the pile sinking efficiency and speed can be remarkably improved, and the technology has the advantages of being free of soil squeezing, free of vibration, low in cost and low in noise.

Description

technical field [0001] The invention relates to a reinforced concrete prefabricated pile sinking process, in particular to a [0002] A high-pressure jet pile extractor pile sinking process. Background technique [0003] At present, the common construction technologies of reinforced concrete prefabricated piles at home and abroad mainly include three methods: hammering pile sinking, static pressure pile sinking, and vibratory pile sinking. It is the most traditional pile driving method, but because the noise is very loud and the vibration may cause damage to the foundation of nearby buildings, this method is currently prohibited in cities; the static pressure pile driving method is Press the prefabricated pile directly into the ground by the self-weight of the pile driver or adding weights. This method has almost no noise, but because it cannot be driven into hard rock formations, it is generally not applicable in places with shallow rock formations, and the geological requ...

AI Technical Summary

Problems solved by technology

[0003] At present, the common construction technologies of reinforced concrete prefabricated piles at home and abroad mainly include three methods: hammering pile sinking, static pressure pile sinking, and vibratory pile sinking. It is the most traditional pile driving method, but because the noise is very loud and the vibration may cause damage to the foundation of nearby buildings, this method is currently prohibited in cities; the static pressure pile driving method is Press the prefabricated pile directly into the ground by the self-weight of the pile driver or adding weights. This method has almost no noise, but because it cannot be driven into hard rock formations, it is generally not applicable in places with shallow rock formations, and the geological requirements are relatively high. Uniform, otherwise it is easy to explode the pile; the vibratory pile sinking method is generally suitable for sandy soil, cohesive soil or medium-density gravel soil

[0004] All in all, the above three pile sinking techniques are often limited by the high compressibility of the soil layer, and it is difficult to sink the pile into the predetermined depth. During the construction, the piles will be damaged to varying degrees, which is not conducive to the reuse of the piles, and These kinds of dynamic pile sinking machines are too heavy, move slowly, and have great requirements on the endurance of the site, so they are not suitable for construction on soft foundations such as river beaches and embankments.