Wet pile extension method for cast-in place pile

Abstract

The invention relates to a wet pile extension method for a broken cast-in place pile. The method is characterized by comprising the following steps of: 1) preparing a wet pile extension device for the broken cast-in place pile; 2) measuring and recording a depth L of a broken position of the broken pile by using a measuring rope, connecting a next branch pipe on a first length of branch pipe through threads, and till the total length of the connected pipe is more than the sum of the depth of the broken position and the length of a length of pipe, recording the total length L of the connected pipe; 3) lifting the lower end of the pipe fully filled with concrete away from a drill hole to a height of 0.45 to 0.55m, then fast putting the pipe down, inserting an end cap and a bottom pipe in the filled concrete in the broken position through concrete mortar mixture by using the pipe and the impulse inertia of the concrete in the pipe; and 4) rotating the pipe clockwise to separate the end cap from the bottom pipe, then continuously pouring the concrete in the drill hole to finish the pile extension of the broken position in the drill hole. The method has the characteristics of simplicity and high efficiency.

Description

technical field [0001] The invention relates to a wet method for connecting piles when bored piles are broken. Background technique [0002] Bored pile is a commonly used pile type for building foundation construction. Due to its advantages of simple construction, reasonable cost and strong soil adaptability, it is widely used in various foundation constructions such as industrial and civil buildings and bridges. However, the control requirements for the construction process of bored piles are very strict. If there is a slight carelessness in the construction, there will be failures such as hole collapse and necking, which will reduce the quality of the piles, and serious problems such as broken piles and waste piles will occur. It is very troublesome to deal with quality accidents, and at the same time, it causes delays in the project schedule and greatly increases construction costs. Therefore, during the construction of bored piles, the key processes must be strictly con...

AI Technical Summary

Problems solved by technology

However, the control requirements for the construction process of bored piles are very strict. If there is a slight carelessness in the construction, there will be failures such as hole collapse and necking, which will reduce the quality of the piles, and serious problems such as broken piles and waste piles will occur. It is very troublesome to deal with quality accidents, and at the same time, it causes delays in the project schedule and greatly increases construction costs

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