A Construction Technology of Slurry-solid Gravel Composite Pile

Abstract

The invention relates to a construction technique for a composite pile formed through broken stone consolidation by slurry. According to the construction technique, a pile hole is dug in a pile position firstly, and a broken stone cushion layer is laid at the bottom of the pile hole; then a prefabricated pipe pile with a slurry injecting pipe is implanted into the pile hole; broken stone is fed into the pile hole, and broken stone which continues to be fed into the pile hole is vibrated to be dense; a close cover is arranged on the upper portion of the pile hole, and valves are arranged on pipe bodies, stretching out to the upper portion of the close cover, of the slurry injecting pipe and a slurry outflow pipe; slurry is pumped into the pile hole through the slurry injecting pipe till the slurry in the pile hole overflows from the slurry outflow pipe, and when the slurry concentration of the slurry outflow pipe reaches the design demand, slurry injecting is stopped, and the valves are closed; and after natural curing is finished, the composite pile formed through broken stone consolidation by the slurry is obtained. The construction technique for the composite pile formed through broken stone consolidation by the slurry is simple, quick and efficient in construction, low in noise, vibration and impacting force during construction, stable in pile-forming quality and high in single pile bearing capacity. The construction technique for the composite pile formed through broken stone consolidation by the slurry is especially suitable for construction sites with a narrow field and pile foundation construction near large buildings or historic monuments and sites and has great economic and social value.

Description

technical field [0001] The invention belongs to a construction method of a pile foundation, and in particular relates to a construction technology of a slurry-solid gravel composite pile. Background technique [0002] Reinforced concrete prefabricated piles are widely used because of their good pile body quality, simple construction technology, easy guarantee of project quality, little environmental pollution and low project cost. Traditional pile foundation construction methods include hammering pile sinking, static pressure pile sinking and other techniques. [0003] In order to increase the traffic flow and alleviate the traffic pressure, widening both sides of the existing expressway has become a necessary technical means. However, the construction of the row of piles on the slope protection of the existing expressway must not only ensure the safety of the construction, but also ensure the safety of the construction. There is normal traffic on the expressway. The vibr...

AI Technical Summary

Problems solved by technology

The vibration, impact force and noise of hammering pile sinking not only affect the safety of the existing roadbed, but also cannot guarantee the normal opening of the existing expressway; although the static pressure pile sinking has no vibration, impact force and noise, but the static pile driver needs A large and stable work platform, but construction on the existing highway slope can not provide such a work platform

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