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Cohesive soil curing agent and cohesive soil soft foundation treating method thereof

A cohesive soil and curing agent technology, applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problem of poor reinforcement effect of cohesive soil, and meet the requirements of engineering construction and high compressive strength Effect

Inactive Publication Date: 2015-11-11
NORTH CHINA INST OF AEROSPACE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a curing agent for cohesive soil treatment, which solves the problem that the cohesive soil with an organic matter content of less than 150g / kg (15%) in the soil has a poor reinforcement effect for saline soil in seawater intrusion areas

Method used

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  • Cohesive soil curing agent and cohesive soil soft foundation treating method thereof
  • Cohesive soil curing agent and cohesive soil soft foundation treating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Sampling of undisturbed soil

[0020] Soil samples were taken from Bid Section 8 (K57+000~K62+200) of the two phases of the Cangzhou Qikou-Haifeng section of the coastal expressway. Yellowish brown to taupe, in fluid plastic to soft plastic state, with an average moisture content of 34%, uneven soil quality, smooth cut surface, medium dry strength, medium toughness, containing illite, organic matter and broken shells, and the water quality is weakly alkaline. The pH value is 7.3, and the water chemical type is Cl-Na. The basic allowable value of bearing capacity is 90~130KPa. Soil samples were taken from above the groundwater table.

[0021] 2. Preparation of cohesive soil curing agent

[0022] Weigh 5 kg of steel slag and 5 kg of quicklime respectively, and mix the two evenly to obtain a cohesive soil curing agent for subsequent use.

[0023] The weight percent composition of steel slag used includes TFe34%, SiO 2 16%, MgO6%, CaO42%.

[0024] 3. Compressive st...

Embodiment 2

[0046] The weight percent composition of steel slag used in the cohesive soil curing agent includes TFe30%, SiO 2 14%, MgO7%, CaO44%, other with embodiment 1, test result is shown in Table 2.

[0047] Table 2

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Abstract

The invention discloses a cohesive soil curing agent and a cohesive soil soft foundation treating method thereof, and belongs to the technical field of foundation (roadbed) treatment in building construction. Being composed of waste steel slag generated by industrial steelmaking and quick lime, the cohesive soil curing agent is low in manufacturing cost, environmentally friendly, capable of being used for treating cohesive soil different in moisture content and good in effect, achieves the effect of turning waste into wealth, solves the problems that at present, the reinforcement effect on salinized soil of saltwater intrusion regions and cohesive soil containing organic matter is poor in civil engineering construction, and has remarkable social benefits and economic benefits, wherein the organic content of the cohesive soil is smaller than or equal to 150 g / kg (15).

Description

technical field [0001] The invention belongs to the technical field of ground (road) treatment in civil engineering, and in particular relates to a curing agent for treating cohesive soil and a method for using the curing agent to treat cohesive soil soft foundation. Background technique [0002] my country has a vast territory, and there are soft (weak) soil layers of various origins, which are widely distributed and thick. This type of soil is characterized by large void ratio, high water content, low shear strength, high compressibility, poor permeability, and long settlement stability time after stress. In recent years, due to the needs of national development, especially the acceleration of construction in coastal areas, it is often necessary to carry out construction on soft (weak) land (road) foundations. Due to the poor physical and mechanical properties of soft (weak) soil, artificial reinforcement is required. For example, the method of in-situ reinforcement wit...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B18/14
CPCY02W30/91
Inventor 刘晓立刘俊德徐卫东常志明孙为民孙悦萍于泽友边龙彪满红霍洪祥李红星梁伟崔凤龙付旭张亮杨桂华边玉强李兵蔡永香王玉洁司文静王振武
Owner NORTH CHINA INST OF AEROSPACE ENG
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