Crashed stone grouting pile with lead holes implanted in cloth bag and construction method

Abstract

The invention discloses a crashed stone grouting pile with lead holes implanted in a cloth bag and a construction method. The crashed stone grouting pile is mainly composed of a prefabricated pile tip, steel strands, the geotechnical cloth bag, a pile end pulp solidification body, a crashed stone pulp solidification pile body and a cover plate. The fabricated pile tip is arranged at the bottom of the pile body. A reserved hole allowing a grouping pipe to penetrate through is formed in the center of the prefabricated pile tip, and holes allowing the steel strands to penetrate through are formed in the edge of the prefabricated pile tip. The pile tip pulp solidification body is formed at the bottom of the prefabricated pile tip through grouting. The crushed stone pulp solidification pile body is arranged on the upper portion of the prefabricated pile tip, and the geotechnical cloth bag is arranged outside the crushed stone pulp solidification pile body. The cover plate is arranged above the crushed stone pulp solidification pile body. The crashed stone grouting pile has the advantages that performance of bulk solid material is given into full play, the problems of necking, expansion, hole collapse, mud contamination and the like are solved for the pile body, the integrity and the bearing performance of the structure are improved, sedimentation of the pile body is reduced, the improvement of the bearing capacity of the foundation is accelerated, and quality of the pile is improved.

Description

technical field [0001] The invention relates to a grouting pile and a construction method, more specifically to a grouting pile with bagged gravel implanted with guide holes and a construction method, belonging to the field of foundation treatment. Background technique [0002] With the continuous development of railways and highways, higher requirements are put forward for the bearing capacity and settlement control of bridge cast-in-place piles. However, most of the southeastern coastal areas are soft soil foundations, which are prone to uneven settlement, so the problem of soft soil foundation treatment is becoming more and more prominent. There are three kinds of construction methods similar to this patent in the engineering field at present, i.e. cloth bag grouting pile, crushed stone grouting pile, post-grouting pile of cloth bag bulk material. [0003] The traditional cloth bag grouting pile construction technology (patent number: ZL200710053179.7) first uses the hol...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the traditional crushed stone grouting piles. (1) The bulging damage is prone to occur within 2-3m of the pile top. When the radial deformation is too large, the bearing capacity of the pile body will be greatly reduced and lead to failure; (2) When the gravel passes through the extremely soft soil layer such as silt, it is impossible to effectively prevent the poured gravel from spreading out of the pile diameter and squeezed into the soft soil layer, resulting in poor uniformity of the gravel grouting pile body and affecting the bearing capacity of the pile body and integrity

(3) During the construction process, the mud in the soil layer will remain in the gravel, pollute the gravel, and affect the bearing performance of the pile

The construction quality of this process is not easy to control, and the pipe is pulled out too quickly, which will easily cause the necking of the pile body, and because it is a soil-squeezing pile, the piles poured in advance are prone to tilting, fracture or even misalignment due to the soil-squeezing effect

During the construction process, hammering will produce a lot of noise, and the vibration will affect the surrounding buildings, so it is not suitable for use in urban areas.

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