Plum-blossom-shaped pile foundation anchor rod composite foundation structure and construction method thereof

Abstract

The invention relates to a plum-blossom-shaped pile foundation anchor rod composite foundation structure and a construction method thereof. The plum-blossom-shaped pile foundation anchor rod composite foundation structure comprises a pile foundation of a plum-blossom-shaped structure, wherein the pile foundation comprises a cylindrical pile body and a plurality of petal bodies circumferentially distributed on the outer part of the pile body, and petal inner main reinforcements are arranged in the petal bodies and located at the centers of the petal bodies, so that the anti-pulling effect of concrete of the petal body parts is ensured; a steel reinforcement cage is arranged in the pile body and comprises in-pile main reinforcements, inner stirrups arranged in the in-pile main reinforcements and outer stirrups arranged outside the in-pile main reinforcements, a protection plate is arranged outside the steel reinforcement cage, the in-pile main reinforcements comprise full-length main reinforcements and conventional main reinforcements which are randomly distributed in a staggered mode, the full-length main reinforcements penetrate into anchor holes, the full-strength main reinforcements are used as anchor hole reinforcements, the length of the conventional main reinforcements is equal to that of the pile body, anchor rod main reinforcements are arranged in the anchor holes, and wrapping bodies are arranged outside the anchor rod main reinforcements.

Description

technical field [0001] The invention relates to a quincunx-shaped pile foundation anchor rod composite foundation structure and a construction method thereof, which are applied in the technical field of power transmission lines. Background technique [0002] With the continuous increase of labor costs and the continuous increase of construction safety risks, the mechanized construction of transmission lines has become an inevitable trend, but the transmission lines have a "point-like" linear distribution, and each construction site is scattered. The construction site is often In the high mountains, how to enter the site and how to miniaturize the construction equipment have become important factors to solve the problem of mechanized construction of transmission lines (the original miniaturized equipment cannot meet the power requirements of conventional foundations), due to the difficulty of entering the site , so the basic mechanized construction of transmission lines has a...

AI Technical Summary

Problems solved by technology

[0002] With the continuous increase of labor costs and the continuous increase of construction safety risks, the mechanized construction of transmission lines has become an inevitable trend, but the transmission lines have a "point-like" linear distribution, and each construction site is scattered. The construction site is often In the high mountains, how to enter the site and how to miniaturize the construction equipment have become important factors to solve the problem of mechanized construction of transmission lines (the original miniaturized equipment cannot meet the power requirements of conventional foundations), due to the difficulty of entering the site , so the basic mechanized construction of transmission lines has always been a shortcoming of line construction

[0003] Due to the rock and soil conditions in mountainous areas, the upper bearing capacity is generally lower and the lower bearing capacity is higher, so the main factor affecting the power of the equipment is the excavation of the lower rock and soil. Most of the existing conventional transmission line undisturbed soil foundations are of equal diameter (such as diameter-excavated foundation, cast-in-situ pile foundation), or the upper part is small in size and the lower part is large (such as excavated foundation, bottom-enlarged excavated foundation, and tapered embedded foundation). According to the mechanical drilling efficiency, under the same power condition, the lower part The excavation progress of the rock and soil mass is slower, or the excavation cannot be carried out smoothly

[0004] There is an invention patent with the notification number CN2009200943217 disclosing a composite environment-friendly foundation with excavation and rock bolts. If a bolter is used for construction, the quality of the lower anchor hole is poor for the rock and soil body that has been excavated in the upper part, which cannot meet the requirements. Construction requirements, so that manual drilling is required in the later stage; if the current conventional drilling equipment is used for drilling (such as rotary drilling rigs, etc.), the equipment is large in size, wide in road repair width, and seriously damages the vegetation of the mountain. , poor environmental benefits

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