The method of treating ultra-soft soil foundation with one-time inserting plate sealing and second-time suction and vacuum drainage
A technology for drainage treatment and vacuum suction, which is applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of long construction period and increased project cost, and achieve the effect of shortening construction period, saving film coating cost and obvious economic benefits.
Active Publication Date: 2017-03-08
NANJING HYDRAULIC RES INST
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Problems solved by technology
Behind these huge dredging and land reclamation projects there is an engineering demand for the rapid processing of ultra-soft soil (recently dredged soil and dredged fill soil, etc.): For the stacking of dredged silt, the traditional stacking yard is used The method of natural drying has a long construction period, and the cost of the project will be greatly increased due to the long-term lease of cultivated land for silt storage
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Embodiment 1
[0037] Embodiment 1, the method for the treatment of ultra-soft soil foundation with primary plate sealing and secondary suction vacuum drainage, refer to Figure 1-Figure 4 , the specific implementation steps are as follows:
[0038] .In the ultra-soft foundation to be treated, artificially insert drainage boards; the inserted drainage boards are arranged in rows; (2) According to the arrangement position of the drainage boards, the drainage boards inserted into the soil are divided into two parts: The drainage boards 1 of the odd rows are the first part; the drainage boards 2 of the even rows are the second part; the drainage boards of the first part are respectively connected with the respective filter pipes; the drainage boards of the second part are drained The plate caps are connected to their respective air pipes; (3) Each filter tube is connected to the vacuum generating device (vacuum pump) through the main pipe, and each air pipe is also connected to the vacuum gen...
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A method for processing a super-soft soil foundation through one time of plate insertion sealing and two times of suction vacuumizing water drainage includes the steps that firstly, water drainage plates arranged in rows are inserted into the super-soft foundation; secondly, the water drainage plates are divided into an odd-number row part and an even-number row part, wherein the first part is connected with filter pipes, and the second part is connected with gas pipes; thirdly, all the filter pipes are connected with a vacuum pipe through a main pipe to form a first-part suction system, and all the gas pipes are connected with the vacuum pump through a main pipe to form a second-part suction system, wherein the first-part suction system and the second-part suction system are independent of each other; fourthly, the to-be-processed super-soft foundation is covered with a sealing film; fifthly, pore water in the filter pipes and the water drainage plates of the first part is sucked; and sixthly, suction of the first part is stopped and vacuum gas suction and water drainage of the second part are started 1 month to 2 months later according to the processing and monitoring effects, and the aims of reducing soil body holes and enhancing the soil body strength are achieved. Compared with a conventional two-time plate insertion processing method, the procedures of second-time plate insertion and film covering are omitted, expenses of second-time film covering are saved, and the construction period is greatly shortened.
Description
technical field [0001] The invention relates to a soft soil foundation treatment construction method, in particular to a treatment method for an ultra-soft soil foundation with primary inserting plate sealing and secondary suction vacuum drainage. Background technique [0002] The definition of ultra-soft soil can be based on its formation background, which is obtained by hydraulic dredging and filling of silt through natural bleeding. It is characterized by high water content (water content of at least 1.5 times the liquid limit), high void ratio, and extremely low strength silt or slime. Since 2010, my country's annual dredging volume has exceeded 1 billion m3, becoming the world's largest dredging country; at the same time, the scale of land reclamation in my country has also continued to expand. As of 2008, only 10 provinces and cities such as Jiangsu, Zhejiang, Fujian, and Guangdong The marine land area is nearly 8 million mu. Behind these huge dredging and land reclam...
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IPC IPC(8): E02D3/10
Inventor 范明桥魏雁冰林生法徐锴
Owner NANJING HYDRAULIC RES INST