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Int J Environ Res Public Health

Title:		Design and Implementation of a Chain-Type Direct Push Drilling Rig for Contaminated Sites
Author(s):		Sun P; Zhou S; Cao H; Cai G; Zhang S; Gao Q; Cheng G; Liu B; Liu G; Zhang X; Liu Y; Wu D; Ding Z; Zeng L; Liao G; Liu L; Wang X; Xiao T; Jin J; Yang H;
Address:		"Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Changsha 410083, China. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China. School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China. Jiangsu Gaiya Environmental Science and Technology Co., Ltd., Suzhou 215000, China. College of Chemical Engineering, Nanjing Tech University, Nanjing 211189, China. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. Chinese Academy of Environmental Planning, Ministry of Environmental Protection of China, Beijing 100012, China. Suntime Environmental Remediation Co., Ltd., Changzhou 213000, China"
Journal Title:		Int J Environ Res Public Health
Year:		2023
Volume:		20230220
Issue:		4
Page Number:		-
DOI:		10.3390/ijerph20043757
ISSN/ISBN:		1660-4601 (Electronic) 1661-7827 (Print) 1660-4601 (Linking)
Abstract:		"For sites where volatile organic compounds are present, the direct push method, in combination with other sensors for investigation, is a powerful method. The investigation process is an integrated drilling and sensing process, but the trajectory of the probe carrying the sensor is ambiguous. This paper explores and introduces the application of a chain-type direct push drilling rig by designing and building a chain-type direct push miniature drilling rig. This rig allows for indoor experimental studies of direct push trajectories. The chain-type direct push drilling model is proposed based on the mechanism of chain transmission. The drilling rig provides a steady direct thrust through the chain, which is driven by a hydraulic motor. In addition, the drilling tests and results described prove that the chain could be applied to direct push drilling. The chain-type direct push drilling rig can drill to a depth of 1940 mm in single-pass and up to 20,000 mm in multiple passes. The test results also indicate that it drills a total length of 462.461 mm and stops after 87.545 s of operation. The machine can provide a drilling angle of 0-90 degrees and keep the borehole angle fluctuating within 0.6 degrees with the characteristics of strong adjustability, flexibility, continuity, stability, and low disturbance, which is of great value and significance for studying the drilling trajectory of direct push tools and obtaining more accurate investigation data"
Keywords:		"*Manipulation, Osteopathic Process Assessment, Health Care *Volatile Organic Compounds chain-type contaminated sites investigation direct push drilling rig lightweight drilling rig;"
Notes:		"MedlineSun, Pinghe Zhou, Shengwei Cao, Han Cai, Guojun Zhang, Shaohe Gao, Qiang Cheng, Gongbi Liu, Biao Liu, Gongping Zhang, Xinxin Liu, Yun Wu, Dongyu Ding, Zhenyu Zeng, Lan Liao, Guangdong Liu, Leilei Wang, Xiaokang Xiao, Ting Jin, Jing Yang, Hanhan eng 2020YFC180060/The Ministry of Science and Technology of China/ 1053320215470/The Independent Innovation Project of Central South University/ Switzerland 2023/02/26 Int J Environ Res Public Health. 2023 Feb 20; 20(4):3757. doi: 10.3390/ijerph20043757"