Screw pile, thread pile piling equipment and piling method

Abstract

The invention relates to screw piles, threaded pile forming equipment and pile forming methods. The pile forming equipment is mainly composed of a body, a telescopic oil cylinder, a motor, an automatic control device, and a conveying pipeline. The power head is installed on the stand of the body base, and the motor is installed on the On the base of the machine body, the motor is connected to the power head through the telescopic oil cylinder, the jig on the drill pipe is connected to the movable jig of the power head, the concrete conveying pipe is connected to the inner drill pipe, and the automatic control equipment is connected to the motor and the telescopic oil cylinder respectively. The advantages of the invention are as follows: ① power output saves electricity and time, expands the application range of equipment, and the construction speed is obviously better than similar inventions; ② the equipment adopts telescopic drill rods, and the drilling depth of the drilling rig is greatly improved; The unique function of hole reaming; ④ realizes the synchronous and non-synchronous functions of rotation and lifting; ⑤ adopts the low center of gravity pile frame, the weight of the equipment is significantly reduced, and its safety performance is improved;

Description

technical field [0001] The invention relates to a pile-forming equipment and two pile-forming methods Background technique [0002] Invention patent ZL03128265.2 semi-screw pile and its pile-forming method and ZL96119602.5 a construction method of cast-in-situ piles. Both of the invented pile-forming methods involve the construction machinery that has been successfully developed: ZL03272306.7 has a thread guide The screw thread equipment of the device, CN1417420.A thread equipment with drilling lead synchronous tracking automatic control system and CN200310117711.9 half screw pile and its processing method and device. Among them, semi-screw piles are academically referred to as screw piles. [0003] The equipment developed according to the above construction methods, methods and processing methods is to solve the key technical requirements of thread / screw forming piles or holes. The technology that the rod rotates and lifts up and down synchronously into holes and piles. ...

AI Technical Summary

Problems solved by technology

②The above equipment often occurs in engineering practice because when the bearing capacity of the soil is large, the self-weight or pressure of the equipment is not enough, and the reaction force of the soil on the drilling tool is greater than the pressure of the drilling rig, resulting in the "slipping" phenomenon of the drill pipe rotating in situ. Once slipping, the drill bit will rotate on the spot, and the thread will be lost, failing to meet the basic technical requirements for the undisturbed soil and piles to occlude

⑤ The concrete piles formed by pump pressure are not stirred, and the homogeneity of the concrete is also affected. At present, the piles formed by cast-in-place have no solution to such disadvantages

In fact, the root cause of the low bearing capacity of cast-in-place full-threaded piles is that they are limited by the strength of their own materials, so that the stress transmission function of the pile threads has not been clearly exerted, and the pile head is often damaged before the soil body is damaged. , so that the bearing capacity of the pile cannot reach the expected effect

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