Drill filling pile slurry

Abstract

The invention relates to a drill filling pile slurry, which belongs to the building construction technical field. The drill filling pile slurry comprises the following components by weight: 100 parts of tap water, 6-10 parts of clay soil, 0.01-0.05 part of sodium carbonate and 0.001-0.006 part of CMC. According to the invention, CMC is added in the clay soil and water for raising the performance index and the quality of the retaining wall slurry during the drill filling pile construction process; thereby the low initial gel strength of a drilling machine can be obtained, the gas inside the slurry is easy to be discharged, and the sand factor can be reduced; the obtained drill filling pile slurry has the advantages that the slurry proportion is 1.06-1.10, the viscosity is 17-20s, and the pH value is 8-10; the colloid fraction is greater than or equal to 98, the mud skin thickness is less than or equal to 2, the stability is good, so that the design and standard requirement can be satisfied, no secondary cleaning of boreholes is required during the construction process, the perfusion of the concrete can be directly carried out, so that the standard requirement of slurry index after forming the boreholes can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a bored pile slurry with high colloid rate and stability and low water loss. Background technique [0002] The cast-in-situ pile foundation is generally constructed with a rotary drilling rig, and the mud runs through the entire construction process of the bored cast-in-place pile. The drilling construction method of the rotary drilling rig is to drill under the protection of mud, and the drilling speed is relatively fast. Due to the structure of the drilling rig, when the drill bit is drilling, each hole needs to reciprocate multiple times. The main functions of the mud are: to protect the hole wall, depress the groundwater, and prevent the hole wall from collapsing; suspend the drilling slag and delay the settlement of the drilling slag. If the retaining mud is not well managed, accidents such as hole collapse may occur. Therefore, the performance ind...

AI Technical Summary

Problems solved by technology

The traditional mud preparation method is to directly use tap water and clay soil to prepare mud. Since the clay particles are difficult to decompose, the viscosity is reduced, the water loss is increased, the fluidity is reduced, and the performance indicators such as the specific gravity of the prepared mud are too large. Clearing the hole cannot meet the construction period and construction technical requirements