试论川西平原地区振动冲击沉管灌注桩复合成桩新工艺

A NEW TECHNIQUE OF PILE-FORMING USED IN THE WESTERN SICHUAN PLAIN AREA: COMBINATION OF VIBRATORY IMPACT PIPE-SINKING AND CONCRETE POURING

冲击沉管灌注桩是我们在川西平原施工过程中探索的一种新型复合桩工艺技术,这项技术具有特殊成孔和成桩方法,它可改善单桩承载力,适应于坚硬地层和软地层,确保了有效桩长度。

A new technology of pile-forming to combine vibratory impact pipe-sinking and concrete pouring is described in this paper. This technique has a special process of holing and borrow inserted between pile positioning and concrete pouring. It can improve the bearing capacity of a single pile. It can suitable both to hard layers and soft layers. And it can ensure the effective length of a pile and prevent the diameter shortening of a pile. This technology is worth to spread.