Screw pile

Abstract

The invention relates to a screw pile which comprises an outer pile body and a pile core. The outer pile body comprises a first pile body made of engineering plastic. The first pile body comprises a shell with an opening formed in one end and a thread structure. A conic portion is formed at the position, corresponding to the opening, of the shell. The thread structure is arranged on the outer surface of the shell. A pile core is arranged in the shell and is fixedly connected with the shell through at least one fastener in an anchoring manner, the pile core and the outer pile body are fixed into a whole, and the outer pile body and the pile core are effectively combined. The screw pile is rotated clockwise so as to be embedded into soil, the thread structure and the soil are in close contact, the thread structure is limited by the soil so as to form large up-and-down resistance, and the resistance is transmitted to the pile core through the fasteners so as to be gathered into large pulling resistance. In the screwing-in process, the soil and water cannot be polluted, stability is good, and the first pile body isolates the pile core from the soil. The screw can completely retreat from the soil by being rotated anticlockwise, the screw pile can be taken out conveniently, no residue is generated in the soil, and the environment protection performance is good.

Description

technical field [0001] The invention relates to the technical field of foundation engineering, in particular to a screw pile. Background technique [0002] In the field of basic engineering technology, the pullout resistance is an important indicator to measure the performance of various structural foundations, and the concrete foundation has the characteristics of relying on its own gravity to resist the pullout force, and can change the pullout force by controlling the amount of concrete, so it is widely used Applied to agricultural facilities, photovoltaic power generation, power and communication towers, and municipal engineering. [0003] With the development of foundation engineering, traditional concrete foundations can no longer meet the cost requirements of users for structural foundations by increasing the amount of concrete used to increase the pullout resistance. In order to reduce the production cost on the basis of ensuring the pullout resistance, the followin...

AI Technical Summary

Problems solved by technology

[0003] With the development of foundation engineering, the traditional concrete foundation can no longer meet the cost requirements of users for structural foundations by increasing the amount of concrete to increase the pullout resistance.

In order to reduce the production cost on the basis of ensuring the pullout resistance, the following three solutions are currently used. Method 1: Prefabricated concrete pipe piles, setting the concrete foundation in the pipe piles, increasing the length of the pipe piles into the soil or thickening the pipe piles The first method is to increase the friction between the surface of the pipe pile and the soil to increase the pull-out resistance, but heavy equipment is required to embed the pipe pile into the soil during construction, which is inconvenient to install; the second method is to increase the thread on the surface of the precast concrete pipe pile to pass the resistance To improve the pull-out resistance, but this method can only be provided with plain concrete at the tip of the thread, which has no bearing capacity, and requires high-power mechanical equipment to complete the screwing of the pipe pile, and the cost is high; method 3, steel spiral The pile can resist pulling out through the resistance formed by the large blades at the bottom, but the corrosion of steel limits the scope of use of the steel screw pile, and the anti-corrosion layer (galvanized, sprayed paint, etc.) on the surface is easily scratched when screwing in. make the anti-corrosion effect less

In addition, the large excavation construction of the above-mentioned concrete foundation and the unique alkalinity of concrete cause serious damage to the soil, and it is difficult to remove the remaining part below the surface, which seriously affects the soil environment and land cultivation, which is not conducive to environment and soil protection.

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