Muddy soil-cement double-pipe grouting process suitable for horizontal channel of pedestrian underground passage in saturated soft clay area

A horizontal channel, soft clay technology, applied in the field of civil engineering, can solve the problems of slow construction speed and limited application scope, and achieve the effect of saving construction period, strengthening competitiveness and improving stability

Inactive Publication Date: 2011-09-07
博地建设集团有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

For saturated soft clay areas, especially the southeast coastal areas dominated by silt soil, due to the influence of special geological conditions and high groundwater level, the application range of shallow buried underground excavation method is limited to a certain extent, and the construction speed is relatively slow

Method used

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Embodiment Construction

[0036] The present invention is specifically described below by the embodiment, only for further illustrating the present invention, can not be interpreted as the limitation of protection scope of the present invention, the technical engineer of this field can make some non-essential improvements and improvements to the present invention according to the content of the above-mentioned invention Adjustment.

[0037] The soil samples were taken from the construction site of a pedestrian crossing in the downtown area of ​​Wenzhou, and the silt soil samples buried at a depth of 4.15m were taken, mixed with triethanolamine, calcium lignosulfonate, calcium chloride, magnesium chloride, alum materials (alum, green alum), etc. A variety of chemical admixtures are combined into 3 kinds of composite admixtures Ly １、 Ly 2、 Ly ３, mixed with different proportions of water glass (50%, 100%, 150% of the weight of cement) to form B liquid; and different proportions of raw gypsum powder, sil...

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Abstract

The invention discloses a muddy soil-cement double-pipe grouting process suitable for a horizontal channel of a pedestrian underground passage in a saturated soft clay area. A large number of indoor orthogonal tests prove that: by adding a variety of composite additives and composite mixtures into the soft soil-cement containing sludge as major ingredient in the Wenzhou city, the compression resistance and the shear resistance of the sludge soil-cement are greatly improved, and patricianly the compression resistance and the shear resistance (3 days to 14 days) are greatly improved, which has great significance in the construction of pedestrian underground passage horizontal channels in urban water-rich soft soil areas. Based on the large number of indoor orthogonal tests, a new formulation of a soft soil reinforcing material is proposed, which is suitable for the shallowly-buried tunneling construction of pedestrian underground passage horizontal channels in water-rich soft soil areas. The pre-grouting method using the new formulation can effectively improve the geological conditions of shallow-buried soil layer of water-rich soft soil and provide a reliable guarantee for the success of the shallowly-buried tunneling construction of pedestrian underground passages.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, in particular to the field of an economical, efficient and reliable soft soil support and reinforcement technology for the treatment of saturated soft clay foundations in municipal engineering and port and wharf projects, in particular to a new technology suitable for urban soft soil Stratum (both saturated soft clay area) pedestrian crossing tunnel shallow buried underground excavation method in the horizontal channel silt soil cement double pipe grouting. Background technique [0002] my country's infrastructure construction has entered a period of great development, and urban construction in soft soil areas is developing rapidly, resulting in a large number of underground excavation projects. In recent years, due to the rapid development of traffic, the traffic in most cities in our country is in a bottleneck stage. The pedestrian pedestrian system in the central urban area is not p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
Inventor 潘林有
Owner 博地建设集团有限公司
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