Soft soil foundation treatment method

Abstract

The invention provides a soft soil foundation treatment method. The soft soil foundation treatment method comprises the following steps of: leveling the ground; arranging a vacuum pipe and a ram pipe according to the designed interval and the designed pipe insertion depth after hole formation by a high-pressure water jetting method, and filling sand for preventing clogging while inserting the vacuum pipe; connecting and sealing the vacuum pipe and the ram pipe with a horizontal pipe of a vacuumizing system horizontally laid and a horizontal pipe of a pressurization system respectively; hermetically connecting the horizontal pipe of each system with a vacuum pipe and a booster pump respectively; starting the vacuum pump and the booster pump to start vacuuming and pressurization, thereby performing forced drainage on the soft soil foundation; in 3-5 days after drainage, removing all materials used by the vacuumizing system and the pressurization system, and performing dynamic compaction on the ground according to the requirements of the designed scheme. According to the method, the construction cost is low, the construction period is short, and the bearing capability is high after treatment.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a soft soil foundation treatment method used in infrastructure construction projects such as airports, ports, traffic roads, substations, and power plants. Background technique [0002] Existing soft ground treatment methods include vacuum preloading, pressurized vacuum preloading, and high vacuum compaction. The problems existing in the existing technology are: the construction cost of vacuum preloading is high, the construction period is long, usually more than half a year, the bearing capacity after treatment is low, ideally only 80kpa, and the treatment depth is shallow, generally within 10 meters. The pressurized vacuum preloading construction period is long, the construction period is generally 4 months, the cost of processing shallow soft soil foundation (within 8 meters) is relatively high, and the bearing capacity after processing is low, and the soft soil foundat...

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Problems solved by technology

The problems existing in the existing technology are: the construction cost of vacuum preloading is high, the construction period is long, generally more than half a year is required, the bearing capacity after treatment is low, ideally only 80kpa, and the treatment depth is shallow, generally within 10 meters

The pressurized vacuum preloading construction period is long, the construction period is generally 4 months, the cost of processing shallow soft soil foundation (within 8 meters) is relatively high, and the bearing capacity after processing is low, and the soft soil foundation with large depth is processed , because the drainage board is a one-time use, so the cost is higher

The high-vacuum densification method has a fast construction speed, generally 45 days as a construction period, and the foundation bearing capacity after treatment is high, but it is only suitable for the treatment of sandy soft soil foundations with large permeability coefficients, and can only treat shallow soft soil foundations (within 6 meters), and the silty soft soil with a small permeability coefficient cannot be treated by this method

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