Construction method combining static pressure pile sinking with middle-digging hole guiding for buildings or bridges

Abstract

The invention discloses a construction method combining static pressure pile sinking with middle-digging hole guiding for buildings or bridges. Equipment comprises a static force pile driver, a truss additionally arranged on the static force pile driver and capable of shifting, a power head assembled on the truss, a power head pressing device, a stem changing device for a long auger stem, and a drill stem driving tool. The construction method comprises the following steps: (1) measuring the piles position, and putting a machine in position; (2) hanging piles and preparing; (3) sinking the piles under static pressure; (4) receiving the piles; (5) mounting the long auger stem; (6) hanging the long auger stem in guided hole and sinking the piles; and (7) terminating the pile pressing. The invention provides the construction method with the advantages of capability of penetrating thicker sand beds, high construction efficiency and low construction cost.

Description

technical field [0001] The invention relates to a construction method of pipe piles for foundations of buildings and bridges, in particular to a construction method of combining static pressure piles for buildings or bridges with middle excavation guide holes. Background technique [0002] The static pressure pile driving method is a pile driving process in which the pipe pile is pressed into the soil by the self-weight of the static pile driver and the counterweight on the frame to provide the reaction force. This process has the advantages of no vibration, no impact, no noise, etc. At the same time, the pile body is made of high-strength prestressed prefabricated pipe piles, and the piles are used as the foundation to have the characteristics of simple process, reliable quality, low cost and convenient detection. However, when the static pile driver encounters a thicker sand layer during the pile driving process, it will cause construction difficulties due to the increased...

AI Technical Summary

Problems solved by technology

However, this construction method consumes a long time and increases the construction cost

It is easy to collapse the hole, and it is difficult for the pile driver to align the hole position

[0005] 2. When the static pressure cannot be relied on to continue sinking the pile, the hammering method is used to penetrate the sand layer by impact on the sand layer, but this method will cause great damage to the prefabricated pipe pile and cause damage to the pile body , loud noise, oil splash pollutes the environment

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