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A platform for research: civil engineering, architecture and urbanism
Ultra-large open caisson structure combined foundation construction method
The invention discloses an ultra-large open caisson structure combined foundation construction method. The method mainly includes the steps that (1) a medium-coarse sand cushion layer is filled on a mud flat of a to-be-newly-built large circulating water taking area; (2) the medium-coarse sand cushion layer is used as a pile frame bearing layer, and rock-socketed cast-in-situ bored pile construction is conducted; (3) rock-socketed construction is conducted on the lower portion of a cast-in-situ bored pile, reinforced concrete is filled, and the cast-in-situ bored pile serves as a permanent supporting structure of an ultra-large open caisson structure; (4) the pile top of the cast-in-situ bored pile is subjected to compaction grouting, and a soil body at a pile head is reinforced, so that the pile and the soil body form a whole; and (5) an open caisson is manufactured and sunk in a graded mode or integrally sunk in a graded mode, after the open caisson is sunk to a designed elevation, plain concrete bottom sealing is conducted, a reinforced concrete bottom plate is poured, and the rock-socketed cast-in-place piles are connected with the bottom plate to form a whole. According to the ultra-large open caisson structure combined foundation construction method, the problems of sudden sinking and super sinking in the manufacturing and sinking process of the open caisson are effectively solved, and the problem of post-construction settlement after the open caisson is in place is also solved.
本发明公开了一种超大型沉井结构联合地基施工方法，主要包括如下步骤：1）在准备新建大型循环水取水区域的滩涂上填筑中粗砂垫层；2）利用中粗砂垫层作为桩架持力层，进行嵌岩钻孔灌注桩施工；3）对钻孔灌注桩下部进行嵌岩施工，填筑钢筋混凝土，作为超大型沉井结构的永久支撑结构；4）将钻孔灌注桩的桩顶部位进行压密注浆，对桩头部位土体进行加固，使桩与土体成为一个整体；5）沉井分级制作分级下沉或分级制作整体下沉，待下沉至设计标高后进行素混凝土封底，浇筑钢筋混凝土底板，将嵌岩灌注桩与底板连接，形成整体；该施工方法有效解决了沉井在制作、下沉过程中的突沉、超沉问题，也解决了沉井就位后的工后沉降问题。
Ultra-large open caisson structure combined foundation construction method
The invention discloses an ultra-large open caisson structure combined foundation construction method. The method mainly includes the steps that (1) a medium-coarse sand cushion layer is filled on a mud flat of a to-be-newly-built large circulating water taking area; (2) the medium-coarse sand cushion layer is used as a pile frame bearing layer, and rock-socketed cast-in-situ bored pile construction is conducted; (3) rock-socketed construction is conducted on the lower portion of a cast-in-situ bored pile, reinforced concrete is filled, and the cast-in-situ bored pile serves as a permanent supporting structure of an ultra-large open caisson structure; (4) the pile top of the cast-in-situ bored pile is subjected to compaction grouting, and a soil body at a pile head is reinforced, so that the pile and the soil body form a whole; and (5) an open caisson is manufactured and sunk in a graded mode or integrally sunk in a graded mode, after the open caisson is sunk to a designed elevation, plain concrete bottom sealing is conducted, a reinforced concrete bottom plate is poured, and the rock-socketed cast-in-place piles are connected with the bottom plate to form a whole. According to the ultra-large open caisson structure combined foundation construction method, the problems of sudden sinking and super sinking in the manufacturing and sinking process of the open caisson are effectively solved, and the problem of post-construction settlement after the open caisson is in place is also solved.
本发明公开了一种超大型沉井结构联合地基施工方法，主要包括如下步骤：1）在准备新建大型循环水取水区域的滩涂上填筑中粗砂垫层；2）利用中粗砂垫层作为桩架持力层，进行嵌岩钻孔灌注桩施工；3）对钻孔灌注桩下部进行嵌岩施工，填筑钢筋混凝土，作为超大型沉井结构的永久支撑结构；4）将钻孔灌注桩的桩顶部位进行压密注浆，对桩头部位土体进行加固，使桩与土体成为一个整体；5）沉井分级制作分级下沉或分级制作整体下沉，待下沉至设计标高后进行素混凝土封底，浇筑钢筋混凝土底板，将嵌岩灌注桩与底板连接，形成整体；该施工方法有效解决了沉井在制作、下沉过程中的突沉、超沉问题，也解决了沉井就位后的工后沉降问题。
Ultra-large open caisson structure combined foundation construction method
一种超大型沉井结构联合地基施工方法
HUANG JIANWU (author) / WU JIANGUO (author) / JIN TAO (author) / TANG LYUJUN (author) / LI QI (author) / SUN BINBIN (author) / SUN YINGJIE (author)
2021-04-16
Patent
Electronic Resource
Chinese
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