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标题：Process diagrams of the driving pile construction in the perforated pipe casing
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作者：Vladimir A. Kovalev
期刊名称：Stroitel’stvo: Nauka i Obrazovanie
印刷版ISSN：2305-5502
出版年度：2019
卷号：9
期号：4
页码：1-15
DOI：10.22227/2305-5502.2019.4.2
语种：English
出版社：Moscow State University of Civil Engineering (MGSU)
摘要：Driving piles in drilled wells are a new trend in pile foundation engineering.Further research and development are devoted to the improvement of structural and process diagrams of these piles in order to increase the bearing capacity mainly on their side surface, mainly in weak clay soils.Materials and Methods.The options of flow and process diagrams of driving piles in perforated (penetrated) wells in various soil conditions are studied taking into account the existing regulatory documents and earlier developments on increasing the bearing capacity of driving piles in perforated (penetrated) wells.Results.The main process operations of the driving piles installation in the soil conditions under consideration include perforation (penetration) of the well with a casing with a loose puncher shoe to the base layer of the soil;formation of a well (cavity) in the base layer of the well by means of immersion of the puncher shoe;installation of a shoe reamer in the puncher shoe and formation of a spread foundation made of hard soil material above;immersion of a casing pipe with holes outside the pipe casing;filling of the casing with hard and bulk soil material;removal of the casing and driving (immersion) into the pipe casing of the precast concrete pile filled with bulk soil material with simultaneous formation of additional local broadening and possible compacted soil zones on the sections of holes along the outer contour of the pipe casing.Conclusions.The proposed structural and process diagrams of driving piles in perforated (penetrated) wells allow to significantly expand the scope of their application in terms of soil conditions, increase the side surface bearing capacity of piles and reliability of the construction of the types of foundations under consideration.
其他摘要：Забивные сваи в пробитых скважинах являются новым направлением в свайном фундаментостроении.Дальнейшие исследования и разработки посвящены совершенствованию конструктивных и технологических схем устройства этих свай с целью увеличения несущей способности
关键词：perforated (penetrated) well;casing with lost shoe puncher;shoe reamer;broadened base made of hard gravel and sludge;pipe casing with holes;reinforced concrete pile
其他关键词：пробитая (продавленная) скважина;обсадная труба с теряемым башмаком-пробойником;башмак-уширитель;уширенное основание из жесткого грунтового материала;труба-оболочка с отверстиями;забивная железобетонная свая