Joint grouting method from bottom and side of prestressed pipe pile

Abstract

The invention relates to a joint grouting method from bottom and side of a prestressed pipe pile. The pipe pile in the soil is subjected to pressure joint grouting on the bottom and side (hole wall) of the pile through a ground grouting device by pre-burying pipelines at the bottom and side of the prestressed pipe pile. Post-grouting quality control adopts a dual-control method of grouting amount and grouting pressure; and cement injection quantity control is used as a primary part, and pumping end pressure is used as an auxiliary part. On one hand, a convex slurry pack stone body formed by grouting plays a protection role on a joint of the pipe pile and the use durability of the pipe pile is improved. In addition, the mechanical performance of a soil body and a boundary condition between the pile soils are changed by grouting, and the strength and the stability of rock-soil around the pile are further improved, so as to improve the bearing capacity of a pile foundation and reduce the settling volume. Therefore, the pile arrangement quantity and the size of a cushion cap can be reduced, the construction period can be shortened, and the construction costs can be reduced.

Description

technical field [0001] The invention relates to a grouting method in civil engineering construction, in particular to a combined grouting method for pile bottom and pile side of prestressed pipe piles. Background technique [0002] The application of prestressed concrete pipe piles is very common in deep foundation engineering of civil engineering at home and abroad, which provides theoretical basis and experience for engineering construction in our country. However, the surface of the prestressed concrete pipe pile in the deep soft soil is smooth, so the frictional resistance of the pile side cannot be effectively exerted, and the bearing capacity of the prestressed concrete pipe pile cannot be effectively reflected. Moreover, in the construction process of prestressed concrete pipe piles, due to improper construction methods, hidden dangers in quality are prone to occur, and the desired effect is often not achieved. A large number of practical data show that the measured ...

AI Technical Summary

Problems solved by technology

At the same time, the end plate is exposed to the soil and is severely corroded

Therefore, how to strengthen the pile bottom strength of pipe piles and strengthen the pile side frictional resistance is a powerful measure to achieve the above goals. After patent retrieval, there is no effective measure to solve the above problems.

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