Grouting pile construction method for dry operation drilling and waterless pouring of concrete

Abstract

The invention relates to a grouting pile construction method for dry operation drilling and waterless pouring of concrete. According to the method, hole drilling and cleaning are carried out in a rotary drilling dry operating method, and the concrete is poured through a waterless method. The operating steps of waterless pouring of the concrete include that when first batch of concrete is poured, the distance between a lower port of a conduit and the hole bottom ranges from 25 cm to 40 cm, and the depth, buried into the concrete, of the conduit is not less than 1 m; in the process of pouring the concrete, the buried depth of the conduit is controlled to be not less than 3 m; when the poured concrete is close to the top of a pile, the height of a funnel is increased so as to ensure that the elevation between the funnel and the top of the pile is not less than 4 m. By the adoption of the method, a mud system is completely omitted, consumption of mud raw materials and water resources is reduced, and the engineering construction cost is obviously lowered; moreover, the cost for transporting excavated muck is far lower than the cost for transporting and processing the mud, so considerable expenses for discharging and processing the mud are saved, the temporarily occupied land of the mud system is omitted, and the effect is obvious especially when construction is carried out on the condition that an urban site is narrow.

Description

technical field [0001] The invention relates to a construction method of a bored cast-in-place pile, in particular to a construction method of a bored-drilled cast-in-situ pile with concrete poured without water. Background technique [0002] The current bored pile operation has two methods: mud retaining drilling and dry hole operation. The mud retaining drilling operation adopts the method of mud retaining, because the retaining layer can be formed to prevent the hole from collapsing, and the slag can be effectively discharged. Providing water pressure support and balancing earth pressure in the hole is a commonly used method at present. However, the method of mud wall protection still has many deficiencies, such as increasing the construction process, it needs to be equipped with mud pools, recovery pools, supply and return slurry pipelines, etc., and the site occupies a large area; the raw material for mud is mainly bentonite, and bentonite is in short supply as a raw ma...

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Problems solved by technology

[0003] However, the current dry hole operation usually uses a long auger drilling machine, which has great limitations (smaller diameter). The manual excavation pile a...

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