Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation

A processing method and high-vacuum technology, which can be used in infrastructure engineering, soil protection, construction, etc., can solve the problems of difficulty in the source of large-scale piles, high transportation costs for supercarriers, and small vacuum loads. The effect of accelerated consolidation time and high consolidation degree

A processing method and high-vacuum technology, which can be used in infrastructure engineering, soil protection, construction, etc., can solve the problems of difficulty in the source of large-scale piles, high transportation costs for supercarriers, and small vacuum loads. The effect of accelerated consolidation time and high consolidation degree

CN1560378AActive Publication Date: 2005-01-05SHANGHAI HARBOUR SOFT SOIL TREATMENT ENG CO LTD
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Embodiment Construction

[0022] The invention is a fast "low-level high-vacuum layered pre-compaction compaction" soft ground treatment method. Its specific implementation process is as follows:

[0023] 1. Before filling, lay a sand layer with a thickness of about 100cm on the beach, then insert plastic drainage boards vertically, arrange a high-vacuum preloading system horizontally in the sand layer, and then cover with a plastic air barrier film, which is covered with geotextiles Protect. The high vacuum preloading system is to place hundreds to thousands of vacuum water collection pipes horizontally in the sand layer, the vacuum water collection pipes are connected to the water collection main pipe, and the water collection main pipe is connected to the high vacuum pump.

[0024] If the original beach is silt and fine sand, in order to further increase the overload stress, insert a 10-meter vacuum water collection pipe vertically with a pipe inserter at the same time as the above-mentioned vertic...

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Abstract

The invention relates to a quick ''low level high-vacuum hierarchical precompression compaction' method for soft ground, the concretely processes are: 1) a sand layer is laid on the ground before filling, then the plastic water discharging boards are inserted vertically, a high vacuum precompression system is arranged transversely in the sand layer, and a layer of plastic air isolating film is covered; 2) the high vacuum precompressing system carries on vacuum and precompression; 3) the sand blowing high vacuum compacting system is arranged on the film transversely or vertically; 4) fills sand on the film to the set height; 5) the high vacuum precompression system carries on precompressing to the set boding rate, the system carries on the first time of vacuuming and discharge, then carries on the first time of compacting or vibration compacting the sand on the film; 6) carries on the second time or several times of 'high vacuum compacting' to the sand to the overconsolidation state. The invention is short period, low price, and the quality is controllable.

Description

Technical field: [0001] The invention relates to a large-area soft ground treatment method. In particular, it relates to a rapid "low-level high-vacuum layered pre-compaction compaction" soft foundation treatment method. Background technique: [0002] At present, my country's coasts and rivers are generally engaged in economic development and construction by reclaiming land from the sea, while the coasts and rivers are formed by alluvial silt, generally 20 to 60 meters long, with low bearing capacity and low beach elevation, requiring dredging and filling of sand. For this reason, the silt soil and dredger fill soil need to be consolidated for foundation treatment. [0003] At present, the commonly used soft ground treatment methods at home and abroad are: [0004] 1. Plastic plate + vacuum preloading means that after the sand is blown and filled in the silt beach, the plastic drainage plate is inserted first, and then a gas barrier film is added on the surface of the blow...

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Application Information

Patent Timeline
05 Jan 2005
Publication
CN1560378A
IPC
E02D3/10
Inventors
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