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Method for filling deep soft foundation zero additional load bubble mixed lightweight soil subgrade

A technology of ground-zero addition and soil roadbed, which is applied in roads, roads, buildings, etc., can solve problems such as difficult handling of deep soft foundations, and achieve remarkable practicability and economy, strong bearing capacity, and low cost

Inactive Publication Date: 2012-11-28
GUANGDONG GUANSHENG CIVIL ENG TECH
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Problems solved by technology

[0003] Aiming at the problem of difficult treatment of deep and thick soft foundations of highway subgrades, the present invention proposes a filling method of deep soft subgrades with zero additional load air bubbles mixed with light soil subgrades, which can reduce post-construction subsidence of subgrades and realize zero additional subgrade stress under subgrades

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  • Method for filling deep soft foundation zero additional load bubble mixed lightweight soil subgrade

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Embodiment Construction

[0018] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0019] The present invention is mainly realized by utilizing the characteristics of air-bubble mixed light soil, which is a kind of closed porous light material with a bulk density of 4-12kN / m 3 , is only 1 / 5 to 3 / 5 of that of ordinary sandy soil roadbed filler, and the mass water absorption rate is not more than 20% under the pressure of 10 meters of water head.

[0020] figure 1 It is a structural schematic diagram of a deep soft foundation zero additional load air bubble mixed light soil subgrade in a specific embodiment of the present invention. Such as figure 1 As shown, firstly, according to the load generated by air bubble mixed light soil subgrade and pavement structure layer (including subgrade, road surface and vehicles), the foundation soil 1 of 1.1 to 1.3 times the weight of the load i...

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Abstract

The invention discloses a method for filling deep soft foundation zero additional load bubble mixed lightweight soil subgrade, which comprises the following steps: according to the load generated by the bubble mixed lightweight soil subgrade and a pavement structure layer, the foundation soil with 1.1-1.3 times of weight of the load can be excavated; a cushion layer is filled on a bottom layer; a base is made at the two sides of the subgrade and a baffle plate is constructed, a waterproof geotextile is paved in the deep scope of a foundation trench; the bubble mixed lightweight soil is casted on the cushion layer and the pavement is paved on the bubble mixed lightweight soil. By using the technical scheme of the present invention, the settlement of the subgrade can be reduced, and the additional stress of the foundation under the subgrade is zero.

Description

technical field [0001] The invention relates to the technical field of roadbed design and construction of highways and municipal roads, in particular to a method for filling light-weight soil roadbeds with zero additional load on deep soft foundations. Background technique [0002] Deep and thick soft foundations are widely distributed in my country. At present, the main treatment methods include drainage consolidation method, pouring cementing material method, composite foundation method, etc., but there are some problems in all of them, such as the preloading period and long construction period of the drainage consolidation method. The post-settlement is large; the perfusion cementing material method is not suitable for permafrost foundations, foundations that corrode cement, and foundations with excessive groundwater flow rates, etc., which are expensive and have certain environmental pollution; the composite foundation method is expensive and complicated to construct. And ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04
Inventor 谢学钦肖礼经姜峰林周志敏
Owner GUANGDONG GUANSHENG CIVIL ENG TECH
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