Grouting pipeline device, conical special-shaped pile and application method thereof

Abstract

The invention discloses a grouting pipeline device. The grouting pipeline device comprises a longitudinal grouting pipe, an annular pipe, grouting machines, a first arc guide pipe and a second arc guide pipe; the longitudinal grouting pipe is arranged on the inner side of the annular pipe in the axial direction of a pile body, and a grouting port is formed in the top of the pile; the annular pipe is perpendicular to the axial direction of the pile body, and is communicated with the longitudinal grouting pipe through the first arc guide pipe; the grouting machines are symmetrically arranged in the center positions of the side surfaces of the pile in the peripheral annular direction of the pile; one side is communicated with the annular pipe through the second arc guide pipe; and the other side is communicated with the external of the pile body. The invention further discloses a conical special-shaped pile for prefabricating the grouting pipeline device and an application method thereof. The grouting pipeline device performs the targeted grouting section setting, grouting scheme selection and parameter design according to different engineering environments and specific working conditions, has such advantages as safety, reliability, high adaptability and flexibility, economy and environmental protection, can effectively compensate the pile side friction resistance of the conical special-shaped pile, reduces the difficulty of secondary construction for improving the bearing capacity of the special-shaped pile, and saves the construction cost.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and relates to a prefabricated grouting pipeline device and a grouting method in a conical special-shaped pile. Background technique [0002] With the development of the modern construction industry, the requirements for the bearing capacity and deformation of the pile foundation are increasing day by day. By changing the shape of the longitudinal section of the pile body, the tapered special-shaped pile increases the unevenness and roughness of the pile-soil interface, so that the bearing capacity of the pile body is significantly improved. , are more and more widely used in engineering practice. [0003] On the other hand, in reality, due to the impact of tunnels passing through existing buildings, bridges and other facilities or other projects, it will have adverse effects on the pile foundation and the area around the pile of the existing building. The excavation of underground works ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a prefabricated grouting pipeline device and grouting method in a cone-shaped special-shaped pile that compensates for side friction in order to solve the problem of the decrease in the side friction of the cone-shaped special-shaped pile caused by the disturbance of the soil around the pile.

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