管道修复人的圈子

ISTT推出了一个新的网络研讨会系列（仅面向会员），这次的标题为：矩形顶管引起的土壤行为。

演讲者为来自日本九州大学的岛田英树教授。此次的课程时间为：2021年12月10日美国东部时间09:00-10:00（北京时间：2021年12月10日22:00-23:00），此网络研讨会仅对CSTT会员开放，会议视频软件为ZOOM。需要参加的此研讨会的请联系CSTT外事专员：Leon Xu (E-mail: leonxu@fastmail.com; ittc@cstt.org; 微信号: leon_tsui)。

ISTT Educational Webinar Series

On the Soil Behavior due to Rectangular Pipe Jacking

Date: 10 December 2021

Time: 14:00 GMT (09:00 am EST-US, 22:00 Beijing, 15:00Berlin)

Title: On the Soil Behavior due to Rectangular Pipe Jacking

Speaker: Prof.Hideki Shimada, Kyushu University

Date: 10 December 2021

Time: 14:00 GMT (09:00 am EST, US, 22:00 Beijing, 15:00 Berlin)

Overview:

The rectangular pipe has a higher utilization space comparingwith the circular pipe, therefore, the rectangular pipe jacking has morepotential applications for underground space excavation. However, groundresponse, jacking force, and pipe bearing state during rectangular pipe jackingare necessary to be analyzed before construction. In this presentation, fourdifferent rectangular pipe aspect ratios with the same utilizationcross-section were investigated by using the 3D finite element method. Inaddition, till now, there is no generally accepted prediction equation forrectangular pipe jacking. It is suggested that the prediction equations ofcircular jacking will overestimate the jacking force for rectangular pipejacking. Therefore, the modified prediction equation is established byconsidering the mechanism and behavior of the surrounding soil. In order toimplement the specific phenomenon of friction force, the pipe-soil contactratio λ is defined to evaluate the contact state, before being introduced tothe modified friction force prediction equation. This modified friction forceequation was verified and is applicable for the jacking force of rectangularpipe lacking.

- About Prof. Hideki Shimada

Hideki Shimada, Professor of Department of Earth ResourcesEngineering, Kyushu University. He has published over 100 papers, and based onthe citations report of 47 papers collected by Web of Science, the averageH-index is 10 with 292 citations. He also published two books, and more than 20scientific publications were in major international journals and top worldconferences. He has achieved Academic Category Winner by International SocietyTrenchless Technology, No-Dig Award 2007 and 2013. He is now Vice-Chair ofJSTT.