Combined pile for foundation engineering

Abstract

The invention discloses a combined pile for foundation engineering. The combined pile for foundation engineering comprises a first casing pipe which is arranged vertically. A second casing pipe is arranged around the periphery of the first casing pipe, I-shaped steel is arranged around the periphery of the second casing pipe, a cement soil outer pile is poured to the outer layer of the I-shaped steel, a pile tip is arranged at the bottom end of the first casing pipe, the diameter of the top of the pile tip is smaller than that of the bottom of the first casing pipe, the pile tip is embedded and inserted into a gravel bed, the cement soil outer pile is buried in a clay layer, a reinforced concrete upper pile body is arranged in a silt layer above the first casing pipe, a cushion cap is transversely arranged in the gravel bed above the reinforced concrete upper pile body, and the cushion cap is located below a ground bottom plate. The combined pile for foundation engineering provided bythe invention is high in bearing capacity of single pile, the cost is reduced by 20%, and the construction speed is higher; compared with pile planting, cement paste flows transversely during pile planting. The pile is higher in near-surface anti-bending and shear-bearing capacity, economical and practical and suitable for foundation engineering of soft foundations of coastal cities in China.

Description

technical field [0001] The invention belongs to the field of building foundation engineering, and in particular relates to a composite pile for foundation engineering. Background technique [0002] In China, Zhedong Pipe Pile Factory has spent more than 10 million yuan to introduce Japanese prestressed pipe pile planting equipment to construct prestressed pipe piles in my country's coastal soft soil areas. First construct a cement-soil mixing pile with a diameter of 1m and a depth of 50-60m in the soft soil layer, and then implant Φ500 bamboo-shaped prestressed pipe piles into the cement soil one by one to form a combined pile with a soft exterior and a rigid interior. The cost is 650 yuan. The reinforced concrete bored pile with a diameter of 1m costs 700 yuan per extended meter. The compressive strength of the pile body, especially the shear and bending resistance of the upper pile body against seismic horizontal waves and typhoons, is much better than the former, so , al...

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Problems solved by technology

The reinforced concrete bored pile with a diameter of 1m costs 700 yuan per extended meter. The compressive strength of the pile body, especially the shear and bending resistance of the upper pile body against seismic horizontal waves and typhoons, is much better than the former, so , although prestressed pipe pile planting is widely used in Japan, Zhedong pipe pile factory spent more than 100 million yuan in three years, but it is difficult to promote it in China. my country is a developing country. Eliminate bored piles for the environment in developed countries

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