On December 25, in qinghai province department of science, through seven experts discuss repeated inquiries and research, China railway 20 game four company research and development of scientific research achievements of the powder saturated saline soil area of qinghai-tibet plateau strength and durability of cement mixing pile technology research, through scientific and technological achievements appraisal, and were consistent evaluation experts reached the domestic leading level. Lu juntuan, deputy research officer of China railway 21st bureau 4 company, and lu wei, deputy general manager, participated in the evaluation of the research results.

The achievements in China railway 20 game four building in golmud to korla new railway line (section) in qinghai early start engineering bid GKQHZHQ2 station as the main research object, selecting typical saline RuanTu District section, on-site survey, sampling, itself on the qinghai-tibet plateau saline soft soil physical properties test, get water soil degradation and the degradation rule of technical parameters, analysis of soil cement mixing pile body degradation effects on embankment settlement and pile body stress.
For the first time in China, the mechanical properties of cement mixing piles in the saline soft soil area of the qinghai-tibet plateau changed under the condition of salt solution curing, providing technical support for the durability design of soil-cement mixing piles in the saline soft soil area of the qinghai-tibet plateau. The application of this technology has successfully improved the construction quality of cement mixing piles in soft foundation of plateau and saline soil, and accumulated experience for similar projects in the future. At the same time, industrial waste residue (fly ash) is used instead of part of cement to improve the corrosion resistance of soil-cement mixing pile.

The appraisal committee listened to reports on work, technology, testing, users, analysis of economic and social benefits, and scientific and technological innovation related to the results, and reviewed relevant data. This project has a great breakthrough in theory, technology, method and process, with a high degree of independent innovation. With mature project technology, the project plays a great role in promoting the scientific and technological progress of the industry, and has great economic and social benefits. Besides, it has published 3 invention patents and 2 papers in core journals. (wang jiangwei)