Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Combined sinking construction method for ultra-deep section type press-sinking large-diameter working well
The invention relates to a combined sinking construction method for an ultra-deep section type pressure sinking large-diameter working well. The combined sinking construction method comprises the steps of preparation before sinking of an open caisson, arrangement of a counter-force device on the periphery of the open caisson, breaking of a cushion layer, pressurized sinking of the open caisson, circulating manufacturing and sinking, final sinking of the open caisson and bottom sealing of the open caisson. The method has the beneficial effects that extra controllable thrust is provided for the well body through the hydraulic machine, so that the open caisson construction can be quicker and more efficient, and the open caisson does not need to sink depending on gravity; sinking with a soil plug in the well is realized, so that the influence of open caisson construction on the surrounding environment is reduced; a thixotropic slurry sleeve is formed around the open caisson to reduce resistance, compressed gas can be sprayed into a gap between the well wall and a soil layer through an air curtain pipe, the soil layer resistance is further reduced, and sinking is assisted; the sectional open caisson manufacturing method is provided, the structural dead weight of a well body is reduced, the construction speed is increased, the open caisson posture is controlled, and difficult geological conditions are overcome.
本发明涉及一种超深节段式压沉大直径工作井组合下沉施工方法，包括步骤：沉井下沉前的准备、在沉井周边设置反力装置、破除垫层、沉井加压下沉、循环制作并下沉、沉井终沉和沉井封底。本发明的有益效果是：通过液压机向井体提供额外的可控推力，使得沉井施工可以更快速效率，不需要沉井依靠重力下沉；实现井内带土塞下沉，以减小沉井施工对周边环境的影响；通过在沉井周围形成触变泥浆套筒降低阻力，还可以利用气幕管向井壁与土层间的空隙内喷射压缩气体，进一步降低了土层阻力，辅助下沉；提出节段式沉井制作方法，减小井体的结构自重，加快施工速度，控制沉井姿态，克服困难地质条件。
Combined sinking construction method for ultra-deep section type press-sinking large-diameter working well
The invention relates to a combined sinking construction method for an ultra-deep section type pressure sinking large-diameter working well. The combined sinking construction method comprises the steps of preparation before sinking of an open caisson, arrangement of a counter-force device on the periphery of the open caisson, breaking of a cushion layer, pressurized sinking of the open caisson, circulating manufacturing and sinking, final sinking of the open caisson and bottom sealing of the open caisson. The method has the beneficial effects that extra controllable thrust is provided for the well body through the hydraulic machine, so that the open caisson construction can be quicker and more efficient, and the open caisson does not need to sink depending on gravity; sinking with a soil plug in the well is realized, so that the influence of open caisson construction on the surrounding environment is reduced; a thixotropic slurry sleeve is formed around the open caisson to reduce resistance, compressed gas can be sprayed into a gap between the well wall and a soil layer through an air curtain pipe, the soil layer resistance is further reduced, and sinking is assisted; the sectional open caisson manufacturing method is provided, the structural dead weight of a well body is reduced, the construction speed is increased, the open caisson posture is controlled, and difficult geological conditions are overcome.
本发明涉及一种超深节段式压沉大直径工作井组合下沉施工方法，包括步骤：沉井下沉前的准备、在沉井周边设置反力装置、破除垫层、沉井加压下沉、循环制作并下沉、沉井终沉和沉井封底。本发明的有益效果是：通过液压机向井体提供额外的可控推力，使得沉井施工可以更快速效率，不需要沉井依靠重力下沉；实现井内带土塞下沉，以减小沉井施工对周边环境的影响；通过在沉井周围形成触变泥浆套筒降低阻力，还可以利用气幕管向井壁与土层间的空隙内喷射压缩气体，进一步降低了土层阻力，辅助下沉；提出节段式沉井制作方法，减小井体的结构自重，加快施工速度，控制沉井姿态，克服困难地质条件。
Combined sinking construction method for ultra-deep section type press-sinking large-diameter working well
超深节段式压沉大直径工作井组合下沉施工方法
DUAN YUSAN (Autor:in) / WANG XINQUAN (Autor:in) / LI RUIFENG (Autor:in) / CHENG SHIYANG (Autor:in) / HOU YU (Autor:in)
03.03.2023
Patent
Elektronische Ressource
Chinesisch
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