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A platform for research: civil engineering, architecture and urbanism
Method for treating foundation above shallow-buried shield tunnel through vacuum preloading
The invention discloses a method for treating a foundation above a shallow-buried shield tunnel through vacuum preloading. The method comprises the following steps that a geological survey report is analyzed, the burial depth and thickness of soft stratums such as sludge are found out, the site design elevation requirement is analyzed, and the length of a vertical drainage body of a sand well or a plastic drainage plate is determined; the control range of the vacuum degree above the shallow-buried shield tunnel is calculated through numerical analysis; an insertion plate length control device is arranged at the bottom of an insertion plate in a sleeving mode, and the insertion plate is arranged; a sealing film is laid; a vacuum degree monitoring instrument is arranged in the site, and informatization construction is implemented; vacuumizing is carried out, and tunnel deformation is observed at the same time; and when the treatment effect is achieved, vacuumizing is stopped. According to the method, the vacuum degree and the insertion plate depth are controlled, the foundation is treated through vacuum preloading above the shallow-buried shield tunnel, and the influence on the shallow-buried shield tunnel in a common preloading method is avoided; and vacuum preloading treatment is adopted above the shallow-buried shield tunnel, and compared with a mixing pile composite foundation, the quality is controllable, the construction period is shortened, and the manufacturing cost is low.
本发明公开了一种真空预压处理浅埋盾构隧道上方地基的方法，包括如下步骤：分析地质勘察报告,查明淤泥等软弱地层的埋深、厚度，分析场地设计标高要求,确定砂井或塑料排水板的竖向排水体长度；通过数值分析计算，浅埋盾构隧道上方真空度的控制范围；插板底部套插板长度控制装置，打设插板；铺设密封膜；场地内布设真空度监测仪器，实施信息化施工；抽真空，同时观测隧道变形；达到处理效果，停止抽真空。本发明通过控制真空度、插板深度，在浅埋盾构隧道上方采用真空预压处理地基，避免了一般预压法中对浅埋盾构隧道的影响；在浅埋盾构隧道上方采用真空预压处理，相比于搅拌桩复合地基，质量可控，节省工期、造价低。
Method for treating foundation above shallow-buried shield tunnel through vacuum preloading
The invention discloses a method for treating a foundation above a shallow-buried shield tunnel through vacuum preloading. The method comprises the following steps that a geological survey report is analyzed, the burial depth and thickness of soft stratums such as sludge are found out, the site design elevation requirement is analyzed, and the length of a vertical drainage body of a sand well or a plastic drainage plate is determined; the control range of the vacuum degree above the shallow-buried shield tunnel is calculated through numerical analysis; an insertion plate length control device is arranged at the bottom of an insertion plate in a sleeving mode, and the insertion plate is arranged; a sealing film is laid; a vacuum degree monitoring instrument is arranged in the site, and informatization construction is implemented; vacuumizing is carried out, and tunnel deformation is observed at the same time; and when the treatment effect is achieved, vacuumizing is stopped. According to the method, the vacuum degree and the insertion plate depth are controlled, the foundation is treated through vacuum preloading above the shallow-buried shield tunnel, and the influence on the shallow-buried shield tunnel in a common preloading method is avoided; and vacuum preloading treatment is adopted above the shallow-buried shield tunnel, and compared with a mixing pile composite foundation, the quality is controllable, the construction period is shortened, and the manufacturing cost is low.
本发明公开了一种真空预压处理浅埋盾构隧道上方地基的方法，包括如下步骤：分析地质勘察报告,查明淤泥等软弱地层的埋深、厚度，分析场地设计标高要求,确定砂井或塑料排水板的竖向排水体长度；通过数值分析计算，浅埋盾构隧道上方真空度的控制范围；插板底部套插板长度控制装置，打设插板；铺设密封膜；场地内布设真空度监测仪器，实施信息化施工；抽真空，同时观测隧道变形；达到处理效果，停止抽真空。本发明通过控制真空度、插板深度，在浅埋盾构隧道上方采用真空预压处理地基，避免了一般预压法中对浅埋盾构隧道的影响；在浅埋盾构隧道上方采用真空预压处理，相比于搅拌桩复合地基，质量可控，节省工期、造价低。
Method for treating foundation above shallow-buried shield tunnel through vacuum preloading
一种真空预压处理浅埋盾构隧道上方地基的方法
XU YUSHENG (author) / MA CHI (author) / FU LIANZHU (author) / JIANG HUIHUANG (author) / MA FANGANG (author) / LIN QINGSHENG (author) / LIU YIMING (author) / GUO YALEI (author) / ZHANG ZHIPING (author) / LIU BAOKUI (author)
2021-10-26
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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