Clean water hole pile foundation constructing method

Abstract

The invention relates to a clean water hole pile foundation constructing method. The method comprises the following steps of: (1) using a floating crane to carry out anchor pulling and positioning, and determining the pile position of drilling construction; (2) using a crawler crane to hang a steel casing to the floating crane, adjusting and keeping the perpendicularity of the steel casing, usingthe floating crane to hang a pile vibratory hammer to vibrate the steel casing at the pile position to enable the steel casing to fall onto bedrock or be embed into the bedrock; (3) using the steel casing and a steel pipe pile to build up a drilling construction platform along a river surface; (4) forming a hole in the steel casing along the river surface, and enabling the water head height in the steel casing to be flush with the river water; (5) using a full-hydraulic percussion reverse circulation drill to carry out the drilling construction without using mud to protect walls during the drilling construction process; (6) drilling to the design elevation, removing the drilling slag at the bottom of the hole, unloading a reinforcing cage, and pouring concrete. The invention is suitable for the conditions with little riverbed covering layers or without riverbed covering layers, and is especially suitable for irregularity of the riverbed rocks.

Description

technical field [0001] The invention relates to an underwater pile foundation construction method, in particular to a clear water hole pile foundation construction method. Background technique [0002] The bridge foundation generally adopts the pile foundation type. The pile foundation can transfer the weight and load of the superstructure of the bridge to the bearing layer to ensure the normal operation of the bridge. The pile foundations of bridges are mostly located in the riverbed. In recent years, the construction method of perforated cast-in-place piles has been mostly used in the construction of pile foundations in water. At present, mud drilling is generally used in the construction of perforated cast-in-place piles. During the construction process, mud is used to bring out the drilling slag and protect the hole wall from collapse. Finally, pour concrete into the hole to complete the construction of the bored pile. The use of mud drilling will cause pollution to t...

AI Technical Summary

Problems solved by technology

The use of mud drilling will cause pollution to the water in the construction area, and this construction method is only suitable for the situation where the river bed is relatively flat and the covering layer is thick

In the case of little or no river bed cover and uneven river bed surface, since this kind of stratum cannot make mud by itself, it is necessary to prepare high-quality mud to protect the hole when using the existing mud drilling, which not only increases the construction workload and Equipment investment, and affect the construction progress

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