Non-dismantling prefabricated concrete pile protecting die plate and construction method

Abstract

The invention provides a non-dismantling prefabricated concrete pile protecting die plate and a construction method. The non-dismantling prefabricated concrete pile protecting die plate comprises a prefabricated concrete protecting layer and concave arc shaped concrete bumps arranged at the inner side of the protecting layer, wherein a full-length hole is formed in the prefabricated concrete protecting layer; the concrete bumps are symmetrically arranged at intervals along the circumference of the inner side of the protecting layer. According to the design requirement, the construction method comprises the following steps: prefabricating and transporting the non-dismantling prefabricated concrete pile protecting die plate; levelling a site, and measuring a pile arranging position; hoisting and positioning the non-dismantling prefabricated concrete pile protecting die plate; performing a method combining mechanical soil excavation in the die plate and water injecting on the sidewall; constructing the bottom part of the die plate until the design height is reached, and then hoisting and positioning a reinforced cage; pouring concrete; grouting; maintaining until the pile is formed; and detecting a pile foundation. Compared with the prior art, the non-dismantling prefabricated concrete pile protecting die plate and the construction method have the advantages that the earth mass at the outside of a pile body, the underground water, the outer load and the like can be effectively stopped, so that the safety can be greatly improved; meanwhile, the non-dismantling prefabricated concrete pile protecting die plate is prefabricated in a factory, so that the construction quality can be ensured, and the construction period can be greatly reduced; the shortages such as necking down and hole collapse in traditional pile foundation construction can be overcome.

Description

technical field [0001] The invention relates to a pile protection formwork, in particular to a demolition-free prefabricated concrete pile protection formwork and a construction method, belonging to the field of civil engineering and building pile foundation engineering. Background technique [0002] The construction in the field of civil engineering and construction is experiencing the development from ground and above-ground projects to underground projects. The depth of foundation pits is getting deeper and larger, and the size of the area is getting larger and larger. The safety of foundation pits is directly related to the construction personnel, construction materials, and construction. The safety of machinery and even surrounding buildings and the environment, so ensuring the safety of foundation pits is of great significance. [0003] Enclosure piles and support piles play a pivotal role in foundation pit engineering. Traditional pile foundation engineering has the f...

AI Technical Summary

Problems solved by technology

[0004] (1) Neck shrinkage, hole collapse, etc. Traditional pile foundation construction is prone to construction defects such as neck shrinkage and hole collapse due to the influence of mud properties and soil conditions;

[0005] (2) Water seepage around the pile foundation poses safety hazards

During the construction of manual excavated piles, it is required to lower the groundwater level to at least 0.5m below the construction surface. A small amount of water is still unavoidable during the construction process, which endangers the safety of construction personnel; when the construction quality of manual excavated pile lining cannot be guaranteed, There is a risk of hole collapse;

[0006] (4) High construction cost

The continuous increase of labor cost leads to the continuous increase of construction cost;

[0007] (5) Long construction period

All construction needs to be carried out on site, including support, excavation, pouring maintenance, and form removal, which is not conducive to shortening the construction period

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