Construction Technology of Cement Mixing Pile on Weak Ground in Plateau Alpine Swamp Area

A technology for cement mixing piles and swampy areas, which is applied in foundation structure engineering, sheet pile walls, buildings, etc., and can solve problems such as slow footage, unsatisfactory construction quality, and easy overturning of construction equipment

Inactive Publication Date: 2020-05-19
CHINA RAILWAY NO 5 ENG GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a construction method of cement mixing piles on weak foundations in plateau alpine swamp areas to overcome the existing construction techniques such as corrosion, slow footage, construction quality that cannot meet the requirements, construction equipment that is easy to overturn, etc. problems, to achieve safe, fast, and meet the technical indicators of cement mixing piles in plateau alpine swamp saline soil areas

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  • Construction Technology of Cement Mixing Pile on Weak Ground in Plateau Alpine Swamp Area
  • Construction Technology of Cement Mixing Pile on Weak Ground in Plateau Alpine Swamp Area
  • Construction Technology of Cement Mixing Pile on Weak Ground in Plateau Alpine Swamp Area

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Embodiment Construction

[0017] The specific construction method is as follows:

[0018] 1. After testing and testing, groundwater is acidic water, and the volume expansion of concrete materials is mainly due to the C in cement. 3 A plays a chemical role, and tests have shown that C in grade 42.5 sulfate and chloride corrosion-resistant cement 3 The content of A is less than 5%. The project finally decided to use 42.5-grade sulfate and chloride corrosion-resistant cement as the construction raw material. During the construction process, the reaction between the sulfate soft soil environment and water was minimal, and the sulfuric acid was greatly reduced. Damage of saline soil to concrete. The use of 42.5-grade sulfate- and chloride-resistant cement can make the technical indicators of cement mixing piles in saline soil areas reach the standard.

[0019] 2. The on-site construction site is a swamp area, and the thickness of the silt is more than 3m. In order to ensure the cement mixing

[0020] The...

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Abstract

The invention discloses a construction process for a soft weak foundation cement mixing pile in a plateau extremely cold marshland area. The construction method comprises the following steps: firstly,detecting the alkalinity or acidity of underground water; secondly, constructing a working platform on a soft weak foundation in a marshland area; thirdly, equipment selecting and modifying; and fourthly, constructing by adopting a four-mixing two-spraying process. The construction process solves the problems that corrosion exists, the penetration speed is low, the construction quality cannot meet a requirement, construction equipment is easy to tilt and the like in the existing construction process, and achieves the purposes of safety, quickness, and meeting various technical indexes of a cement mixing pile in a plateau extremely cold marshland salty soil area.

Description

technical field [0001] The invention relates to a construction method of cement mixing piles on weak foundations, in particular to a construction method of cement mixing piles on weak foundations in plateau alpine marsh areas. Background technique [0002] For the construction in the plateau alpine Gobi area, it is very difficult to use water and electricity for construction, it is difficult to organize material supply, the construction front is long, the management span is large, the wind and sand are large, the working and living environment conditions are harsh, and the efficiency of construction machinery and labor is extremely low. Weak ground treatment is characterized by a large amount of engineering and a tight schedule; from the perspective of engineering geological conditions, the permafrost in this area, except for the permafrost, most of the Qinghai-Tibet Railway is in unfavorable geological areas, and the entire line passes through Gobi, fine sand (small-scale de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/46
CPCE02D5/46
Inventor 梁志军刘本仕王志委王兴生韩杰
Owner CHINA RAILWAY NO 5 ENG GRP
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