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Method for improving strength of cement mixing piles for sand-rich geological high-rise building

A technology for cement mixing piles and high-rise buildings is applied in the field of improving the strength of cement mixing piles to achieve the effects of high pile body strength, safe and reliable engineering quality, and high characteristic value of composite foundation bearing capacity.

Inactive Publication Date: 2020-09-11
CHINA MCC5 GROUP CORP
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Problems solved by technology

[0006] Therefore there are above-mentioned inconveniences and problems in the known mode of improving the strength of high-rise building cement mixing piles

Method used

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  • Method for improving strength of cement mixing piles for sand-rich geological high-rise building

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Embodiment 1

[0028] The specific operation of the method for improving the strength of the sand-rich geological high-rise building cement mixing pile of the present invention is as follows:

[0029] On-site sampling, the sampling location is located at -3.0m, -5.0m, -6.0m below the natural ground of Building 7 in Block B. After the fine sand and silty clay soil samples are dug out by the hook machine, they are immediately put into plastic bags for delivery. Samples, sampling, numbering, sample delivery, and test block production are fully supervised and supervised in quality. The test block test method refers to the relevant implementation standards and instructions such as "Technical Regulations for Soft Soil Foundation Deep Stirring Method Reinforcement Method" YBJ225-91, "Soil Engineering Test Regulations" SL237-1999 and GB / T50081-2002.CCS03:2007. In the laboratory, several cement-soil test blocks with different cement mixing ratios and different ages were carried out, and Po42.5 grade ...

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Abstract

The invention relates to a method for improving the strength of cement mixing piles for a sand-rich geological high-rise building. The method for improving the strength of the cement mixing piles forthe sand-rich geological high-rise building is characterized by comprising the following steps of a, sampling, inspecting, and manufacturing test blocks; b, testing the test blocks; c, directly conducting unconfined compressive strength tests of pile bodies at different ages for test block samples; and d, conducting a laboratory test for cement mortar test blocks so as to obtain compressive strength indexes, specifically, according to different cement-mixed ratios, conducting the laboratory test on the cement mortar test blocks at different ages so as to obtain the compressive strength indexes. The method for improving the strength of the cement mixing piles for the sand-rich geological high-rise building provided by the invention has the characteristics of scientific and standard experimental procedure setting, high operability, capability on ensuring high pile body strength of cement mortar piles, a high bearing capacity characteristic value of a single pile and a high bearing capacity characteristic value of a composite foundation, capability on enabling the strength of the cement mixing piles to reach to 390 KPa, and high safety degree and economic effect.

Description

technical field [0001] The invention relates to a method for increasing the strength of cement mixing piles, in particular to a method for increasing the strength of cement mixing piles for high-rise buildings in sand-rich geological conditions. Background technique [0002] Cement mixing piles are economical in unit price and simple in construction technology. Therefore, many projects can be applied, but most of them are used as water-stop piles and foundation treatment (composite foundation), because the mixing piles are weak piles, and the strength of the pile body is low. In actual application, the method of increasing cement content and curing age is usually adopted, but it will bring the risk of increasing capital investment and prolonging the construction period to the actual project. [0003] Chinese patent CN107620303A disclosed a method for improving the strength of cement mixing piles in silt areas on January 23, 2018, in which a set of compressive strength formu...

Claims

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Application Information

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IPC IPC(8): E02D5/46E02D33/00
CPCE02D5/46E02D33/00
Inventor 王超梁广远汪从何荣华刘中华
Owner CHINA MCC5 GROUP CORP
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