US 12,421,684 B2
Method for preventing sudden subsidence of open caisson in soft foundation
Rui Yuan, Tianjin (CN); Lin Qin, Tianjin (CN); Gang Huang, Tianjin (CN); Qianchao Yin, Tianjin (CN); Hao Hong, Tianjin (CN); and Jianlong Yan, Tianjin (CN)
Assigned to CHINA TIESIJU CIVIL ENGINEERING GROUP CO., LTD., Hefei (CN); and THE THIRD CONSTRUCTION CO., LTD. OF CTCE GROUP, Tianjin (CN)
Filed by CHINA TIESIJU CIVIL ENGINEERING GROUP CO., LTD., Hefei (CN); and THE THIRD CONSTRUCTION CO., LTD. OF CTCE GROUP, Tianjin (CN)
Filed on Jul. 5, 2023, as Appl. No. 18/347,006.
Application 18/347,006 is a continuation of application No. PCT/CN2022/105091, filed on Jul. 12, 2022.
Claims priority of application No. 202111381724.1 (CN), filed on Nov. 22, 2021.
Prior Publication US 2023/0358010 A1, Nov. 9, 2023
Int. Cl. E02D 23/16 (2006.01); E02D 3/12 (2006.01)
CPC E02D 23/16 (2013.01) [E02D 3/123 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for preventing sudden subsidence of an open caisson in a soft foundation, comprising the following steps:
S1, determining a position of the open caisson;
S2, carrying out grouting to reinforce a foundation of the open caisson, and the foundation of the open caisson being located at a bottom of a wall of the open caisson;
S3, levelling an open caisson manufacturing site;
S4, manufacturing and installing sections of the open caisson, comprising:
I, manufacturing sections of the open caisson, and fixedly installing bearing units on the inner sides of the upper parts of the sections; the bearing unit comprises a plurality of brackets and a frame, the brackets are fixedly installed on the inner side of the upper part of the section at uniform intervals, the frame is fixedly installed on the plurality of brackets, and a support is fixedly installed at the bottom of the frame; and a template is laid on the top of the frame;
II, enabling the first section to subside;
III, calculating the mass of the second section, placing a load with the same weight as the section on the bearing unit of the first section, and pre-pressing the first section for 24 h with the load;
IV, if the first section has no obvious subsidence, taking out the load, and installing the second section by subsidence; and
V, if the first section has subsidence, re-adjusting a construction solution;
S5, repeating S4 until all the sections are manufactured and the open caisson subsides in place as a whole.