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

A technology of pouring concrete and construction method, which is applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of high risk of under-hole operation, increased labor cost, difficulty, etc., and achieves improved construction quality, fast acceptance speed, The effect of fast infusion

Active Publication Date: 2014-10-22
河北省水利工程局集团有限公司
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  • Abstract
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  • Application Information

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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 and the concrete pouring pile need to be vibrated by a vibrator. In addition to increasing the labor cost, the operation under the hole too dangerous and extremely difficult

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

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Embodiment 1

[0034] Example 1 Construction of cast-in-place piles for the Qinglan Aqueduct in the Handan section of the main canal of the middle route of the South-to-North Water Diversion Project, combined with figure 1 The inventive method is described in detail:

[0035] (1) Geological survey and confirmation of pile locations: the conventional method completes the survey work before laying the casing and confirms the pile locations

[0036] The geological overburden that the pile passes through is mainly multi-layer structures such as artificial fill, clay rock, argillaceous siltstone, fine sand, and silt. Mainly clay rock. The thickness of a single layer of clay rock is generally 5m-20m, the thickness of a single layer of argillaceous siltstone is 0.5m-6.1m, and the thickness of a single layer of silt-fine sand (locally medium sand) is 1.1m-7.3m.

[0037] There is no surface water in the site. The site is located in the funnel area of ​​Handan City. The buried depth of groundwater ...

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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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Application Information

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IPC IPC(8): E02D5/38
Inventor 王文田王立新霍燚武孟元张建辉娄素丽张悦李鹏李春强史亚红李平梁朝军郭建勇武媛苗张运超陈警
Owner 河北省水利工程局集团有限公司
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