Deep backfilled stone layer waterproof curtain dth hammer and follow-pipe occlusion comprehensive construction method

Abstract

The invention relates to the technical field of deep backfilled stone layer waterproof curtain construction and discloses a deep backfilled stone layer waterproof curtain dth hammer and follow-pipe occlusion comprehensive construction method which comprises the following steps: S1, construction preparation: carrying out ground leveling, positioning and paying off, and enabling construction equipment and machines and tools to enter the construction site; S2, guide wall construction; S3, shoe welding; S4, installation of a guard barrel and a dth hammer in position; S5, enable the dth hammer andthe follow-pipe to realize occlusion to drill a hole and a final hole; S6, mounting and placing a pouring guide pipe; S7, pouring underwater concrete to form a pile; and S8, adopting a vibratory hammer to pull the guard barrel. The construction method has the following benefits: the hole forming efficiency is high, when the waterproof curtain realizes occlusion to form a pile, the entire guard barrel follows to realize occlusion, the cutting perpendicularity is controlled well, the occlusion effect is excellent, the problems that the traditional construction technology of the deep backfilled stone layer is slow in construction progress and difficult in pile forming are effectively solved; and the ultra high wind pressure enables the broken rock slag to be blown out of the holes at one time, so that repeated crushing of the rock slag in the holes is reduced, and the hole forming speed is more than five times of that of rotary excavating drilling, so that the hole forming speed is greatly accelerated, the pile forming quality is high, and the comprehensive cost is low.

Description

technical field [0001] The patent of the present invention relates to the technical field of construction of water-stop curtains in deep rock-fill layers, and specifically relates to a comprehensive construction method of submerged-hole hammer and pipe engagement for water-stop curtains in deep rock-fill layers. Background technique [0002] The occlusal cast-in-place pile is a common form of water-stop curtain in the existing foundation and foundation engineering. With the increasing development of engineering construction, the large-scale development of coastal and offshore engineering often encounters construction land formed by land reclamation from mountains. The construction land contains a large amount of deep and thick rockfill, which has a great impact on the construction of the occlusal cast-in-situ pile water-stop curtain. [0003] When the full-rotary drilling rig is used to form the hole, due to the irregular gaps in the rock filling layer and the hard character...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a comprehensive construction method for deep rock filling layer water stop curtain submerged hole hammer and pipe occlusion, aiming to solve the problems in the prior art that the construction of deep rock fill layer water stop curtain is difficult to form piles, takes a long time and is of poor quality

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