Pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment and method thereof

Abstract

The invention discloses pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment in the technical field of building construction. The pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment comprises a drill rod driven by an external power device to rotate, wherein the lower end of the drill rod is coaxially and fixedly connected with a mounting rod; the lower end of the mounting rod is provided with a spiral blade; the spiral blade is driven by a driving unit to radially stretch out and draw back along the mounting rod, so that the adjustment of the hole diameter of a drilling hole is realized; a through groove communicated with the interior of the drill rod is formed in the outer wall of the lower end of the drill rod; a water filling unit and a slurry discharging unit are arranged in the drill rod; the water filling unit is used for filling water into the drill hole; and the slurry discharging unit is used for discharging slurry in the drill hole. The pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment and method thereof provided by the invention have the beneficial effects that hole guiding and pile pressing can be synchronously carried out, the soil squeezing effect of the pipe pile is controllable, the characteristics of reliable bearing capacity after pile forming and the like are achieved, static pressure of soft soil layers, hard soil layers and soft and hard interbedding areas or construction of variable-diameter hole guiding needed by hammering the pipe pile can be completed, and compared with a traditional construction method, the method has the characteristics that the construction efficiency is high, the soil squeezing effect of the pipe pile is controllable, and the bearing capacity is reliable after pile forming.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a device and method for synchronous construction of pilot holes with variable diameters and pressure piles for pipe piles. Background technique [0002] The pipe pile is a hollow body slender concrete prefabricated component made by pretensioning prestressing process and centrifugal forming method. In 1987, the Third Navigation Engineering Bureau of the Ministry of Communications of my country introduced a complete set of prestressed high-strength concrete pipe pile production lines from Japan. In the late 1980s, China Ningbo Zhedong Cement Products Co., Ltd., with the cooperation of relevant scientific research institutes, developed the pretensioning prestressing method through the transformation of pipe piles in view of the characteristics of more silt and soft soil layers in my country's coastal areas. Concrete thin-walled pipe piles. Pipe piles are widely used in enginee...

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Problems solved by technology

Although it can solve the problem of the pipe pile passing through the deep clay layer and the hard soil layer in the middle, this method has many technological processes, high technical requirements for process connection, and high labor, mechanical, and time costs; the two mechanical secondary displacement machines , it is very easy to produce collapsed holes or inclined holes; the control of the two kinds of mechanical secondary placement elevations is chaotic, and many problems such as "over-drawing" pile ends or "under-drawing" pile ends that cannot be pressed in are prone to occur.

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