Abstract:
Jacking of long-distance oil and gas pipeline in river is often used in conditions of complex geology structure, frequently changing stratum lithology, and high pressure of underground water, where the operation is difficult and high-level equipment are required. Therefore, investigation, design and operation standards for such jacking are of great importance. In this paper, the Chinese jacking standards are benchmarked with DWA-A 125E Pipe Jacking and Related Techniques in German, ASCE 36-01 Standard Construction Guidelines for Microtunneling in America and メカニカルブラインド-2003 Mechanical Non-directional Construction Law in Japan from the aspects of the depth of geological exploration, geotechnical physical and mechanical indexes, pipe jacking equipment selection, minimum requirements of equipment configuration and risk analysis. In addition, some suggestions are proposed to revise some standards in China as follows. Firstly, pipe jacking projects should be classified according to the complexity and difficulty of geology, secondly, rock and soil test projects should be determined according to the properties of rock and soil and an important parameter of abrasion coefficient is adopted and thirdly, the minimum requirements for the configuration of pipe jacking equipment should be given clearly during design and risk analysis should be considered. Moreover, this paper points out the theoretical difference in jacking standards, namely, foreign countries care more about the risk analysis and evaluation, while China focuses more on details in implementation of jacking.