Salvage method for large-diameter pile buried hammer

Abstract

The invention relates to the field of construction, in particular to a salvage method for a large-diameter pile buried hammer. Equipment adopted by the salvage method comprises a punching pile machine, a new larger pile hammer, a small pile hammer, a positioning pulley, a movable pulley block, a guide wheel, an added winch, a slurry pump, a slurry conveying pipe and slurry. The punching pile machine comprises a main winch and a secondary winch. The main winch, the new large pile hammer, the small pile hammer and the positioning pulley form a new punching system. The secondary winch, the slurry pump, the slurry conveying pipe and the slurry form a slurry circulating system. The added winch, the movable pulley block and the guide wheel form a lifting system. The salvage method includes the following steps of A, positioning of the punching pile machine, B, assembling of the new punching system, C, installation of the movable pulley block, D, installation of the added winch and the guide wheel, E, assembling of the new lifting system, F, assembling of the new slurry circulating system and grouting, G, punching operation with the large pile hammer, H, punching operation with the small pile hammer, I, lifting with the lifting system and J, accomplishment of salvage of the pile buried hammer.

Description

technical field [0001] The invention relates to the field of construction, and in particular to a fishing method for large-diameter piles buried with hammers. Background technique [0002] Punching cast-in-situ pile is to use the punching pile machine to raise the heavy drill bit (also known as the impact hammer) with the drill edge, drill the hole through the impact of the free fall of the hammer, discharge the debris, clear the hole, lower the steel cage, and pour concrete. become. Because of its strong applicability, high bearing capacity and small settlement, it is the most commonly used form of pile foundation, and it is also the most commonly used foundation form in high-rise buildings and bridge construction. Punched cast-in-situ piles are divided into small-diameter piles (d≤250mm), medium-diameter piles (250mm<d<800mm), and large-diameter piles (d≥800mm) according to the pile diameter (d). The single pile bearing capacity of large-diameter cast-in-situ piles...

AI Technical Summary

Problems solved by technology

However, in the process of operation, due to the poor effect of the mud protection wall in the pile hole or the collapse of the hole wall caused by the karst cave, the quicksand layer encountered in the geological layer, and the stuck hammer was not lifted up in time, etc., the buried hammer accident often occurred. In the depths of the earth's surface, "invisible and intangible", it is very difficult to deal with accidents. Many construction units have tried their best to salvage them due to lack of experience in handling them, but they still end in failure.

If the hammer head cannot be taken out, the loss of a pile hammer is not only a loss of the cost of the pile hammer (the market price of a 1.8-meter-diameter pile hammer is about 40,000 yuan), delays in the construction period, but also often causes the pile site to be scrapped, and the pile needs to be replenished. Cause double loss of construction period and investment

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