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A platform for research: civil engineering, architecture and urbanism
Open caisson pressing sinking method construction method
The invention discloses an open caisson pressing sinking method construction method. The open caisson pressing sinking method construction method comprises construction preparing work, foundation pitexcavating, sand cushion layer and plain concrete cushion layer manufacturing, foundation pit excavating, sand cushion layer and plain concrete cushion layer manufacturing, open caisson first joint, second joint and third joint manufacturing, open caisson first-time sinking, open caisson fourth joint and fifth joint manufacturing and open caisson second-time sinking. The water-discharge-free sinking technology is adopted in an open caisson, the soil sampling manner is cooperation of air mud suction and divers, and pressing sinking method sinking and thixotropic mud resistance reduction sinkingassisting are adopted in the sinking assisting manner. Open caisson underwater plain concrete bottom sealing, open caisson bottom plate manufacturing and pipeline buttress, mud discharging well and tail work construction are conducted. The pressing sinking method is adopted in the open caisson pressing sinking method construction method so that the open caisson posture can be conveniently controlled, the open caisson sinking precision is high, the depth of penetration into a soil layer through an open caisson blade foot is larger through a counter force system, the enough sinking coefficientis achieved, the open caisson sinking speed can be greatly increased, disturbance on an outer soil body is little, differential settlement, deformation, cracking and other phenomena are not likely tohappen to structures, and in the sinking process, the phenomenon of humping cannot happen to a soil bin in a well grid.
本发明公开了一种沉井压沉法施工方法，包括施工准备工作，基坑开挖及砂垫层、素砼垫层制作，基坑开挖及砂垫层、素砼垫层制作，沉井第一、二、三节制作，沉井第一次下沉，沉井第四、五节制作，沉井第二次下沉；沉井采用不排水下沉工艺，取土方式为空气吸泥潜水员配合，助沉方式为压沉法下沉和触变泥浆减阻助沉；沉井水下素砼封底，沉井底板制作，管道支墩、排泥井及尾工施工；本发明采用压沉法便于控制沉井姿态，沉井下沉精度高，通过反力系统使得沉井刃脚贯入土层的深度更深，具有足够的下沉系数，可大幅提高沉井下沉速度，对外部土体扰动小，有效防止构筑物易出现不均匀沉降、变形、开裂等现象，下沉过程中井格内土仓不会出现隆起现象。
Open caisson pressing sinking method construction method
The invention discloses an open caisson pressing sinking method construction method. The open caisson pressing sinking method construction method comprises construction preparing work, foundation pitexcavating, sand cushion layer and plain concrete cushion layer manufacturing, foundation pit excavating, sand cushion layer and plain concrete cushion layer manufacturing, open caisson first joint, second joint and third joint manufacturing, open caisson first-time sinking, open caisson fourth joint and fifth joint manufacturing and open caisson second-time sinking. The water-discharge-free sinking technology is adopted in an open caisson, the soil sampling manner is cooperation of air mud suction and divers, and pressing sinking method sinking and thixotropic mud resistance reduction sinkingassisting are adopted in the sinking assisting manner. Open caisson underwater plain concrete bottom sealing, open caisson bottom plate manufacturing and pipeline buttress, mud discharging well and tail work construction are conducted. The pressing sinking method is adopted in the open caisson pressing sinking method construction method so that the open caisson posture can be conveniently controlled, the open caisson sinking precision is high, the depth of penetration into a soil layer through an open caisson blade foot is larger through a counter force system, the enough sinking coefficientis achieved, the open caisson sinking speed can be greatly increased, disturbance on an outer soil body is little, differential settlement, deformation, cracking and other phenomena are not likely tohappen to structures, and in the sinking process, the phenomenon of humping cannot happen to a soil bin in a well grid.
本发明公开了一种沉井压沉法施工方法，包括施工准备工作，基坑开挖及砂垫层、素砼垫层制作，基坑开挖及砂垫层、素砼垫层制作，沉井第一、二、三节制作，沉井第一次下沉，沉井第四、五节制作，沉井第二次下沉；沉井采用不排水下沉工艺，取土方式为空气吸泥潜水员配合，助沉方式为压沉法下沉和触变泥浆减阻助沉；沉井水下素砼封底，沉井底板制作，管道支墩、排泥井及尾工施工；本发明采用压沉法便于控制沉井姿态，沉井下沉精度高，通过反力系统使得沉井刃脚贯入土层的深度更深，具有足够的下沉系数，可大幅提高沉井下沉速度，对外部土体扰动小，有效防止构筑物易出现不均匀沉降、变形、开裂等现象，下沉过程中井格内土仓不会出现隆起现象。
Open caisson pressing sinking method construction method
一种沉井压沉法施工方法
HUANG WEIZHONG (author) / ZHANG ZULI (author) / LIU YULONG (author) / LIAO YIBO (author) / WU MANHUA (author)
2020-07-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Operation method of open caisson pressing sinking process
| European Patent Office | 2024