Building grouting pile foundation construction method

Abstract

The invention relates to a building grouting pile foundation construction method. The method comprises the steps of construction layout, site treatment, pile casing pre-burying, hole drilling, hole cleaning, secondary hole cleaning, steel reinforcement cage manufacturing, storage, transportation and laying, trinary hole cleaning, commercial concrete supplying and underwater concrete grouting. The building grouting pile foundation construction method overcomes the defects in the existing pile foundation construction technology, is free of restriction of geological conditions, guarantees the quality of pile foundations, can avoid site concrete condensation influences during pile foundation construction, guarantees continuous construction of pile foundation, lowers construction cost, and improves construction efficiency.

Description

technical field [0001] The invention relates to a construction method for a construction cast-in-place pile foundation, which belongs to the technical field of building foundation and foundation engineering. Background technique [0002] The most basic function of pile foundation engineering is to create conditions for the open excavation of underground engineering. Pile foundations existed as underground engineering construction measures in the early days, just as formwork must be erected to construct reinforced concrete. However, as the excavation of the pile foundation becomes deeper and larger, the design and construction of the pile foundation enclosure structure become more and more complicated, and the theory and technology required are getting higher and higher, which far exceeds the standard of construction. In the category of auxiliary measures, the construction unit does not have enough technical force to solve the complex problems of pile foundation stability, d...

AI Technical Summary

Problems solved by technology

However, as the excavation of the pile foundation becomes deeper and larger, the design and construction of the pile foundation enclosure structure become more and more complicated, and the theory and technology required are getting higher and higher, which far exceeds the standard of construction. In the category of auxiliary measures, the construction unit does not have enough technical force to solve the complex problems of pile foundation stability, deformation and environmental protection, and the intervention of research and design units solves the theoretical calculation and design problems of pile foundation engineering

[0003] At present, a single construction method is generally used for pile foundation drilling, but its construction efficiency is low. Generally, 5-8m can be completed per day in general strata. Complete 20-50cm; but in terms of pile foundation quality, because the bottom is cleaned by dredging and clearing holes, the thickness of the bottom of the hole is easy to control, which can ensure that the quality and thickness of the end-bearing piles meet the requirements

However, its applicable strata are limited, and it is easy to cause accidents such as hole collapse, drill sticking, and buried drill. In terms of pile foundation quality, double-opening drills are used to clean the bottom. If the construction process is not strictly controlled, especially when the mud retaining wall is formed. During construction, it is easy to cause problems such as the thickness of the bottom of the hole exceeding the standard

In addition, if the ground surface is a flat field and the soil layer is newly backfilled, coupled with the influence of rainwater, the site mud will be thicker under the action of muddy water, etc., and the soil layer will be disturbed when the drilling rig moves, and it will be stirred into mud, which is very inconvenient for the drilling rig to move. Even unable to move, had to stop work or take measures such as laying steel plates, which not only increased the construction cost, but also prevented smooth construction