Intermittent vacuum precompression device and soft foundation treatment method of intermittent vacuum precompression device

• Main Authors: XU KAI, LIN SHENGFA, GENG ZHIZHOU, PENG ZHONGHAO, WEI YANBING, CHEN GENG, LI BINGYI, FAN MINGQIAO
• Format: Patent
• Language: English
• Published: 25.03.2015
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses an intermittent vacuum precompression device and a soft foundation treatment method of the device. The intermittent vacuum precompression device comprises vertical drainage bodies (1), direct connecting joints (2) connected with the vertical drainage body (1), connecting pipes (3) connected with the direct connecting joints (2), discharge branches (4) connected with the connecting pipe (3), a drainage collector (5) connected with the discharge branches (4), a jet pump (6) connected with the drainage collector (5), and a valve (7) mounted between the drainage collector (5) and the jet pump (6). The device can delay aggregation of clay fine particles during drainage via short-period variation of a vacuum degree in an early drainage stage, alleviate clogging of the drainage bodies due to clay particle migration under the condition of applying a constant vacuum degree and therefore delay the clogging of a drainage pipeline and a neighbouring soil body. The device can solve the problem of too early clogging of a drainage channel due to soil material migration in the existing vacuum precompression process, and has an important application value.