|
|
|
| Application Research on the Reamer to Deep Cone Penetration Test |
| GAO Jing，CHEN Xin-jun |
| The Third Railway Survey and Design Institute Group Corporation，Tianjin 300251，China |
|
|
|
|
Abstract Research purposes: To solve the limitation of depth of traditional CPT which could not meet the requirements of the survey and design in hard soil layers，the deep cone penetration test that has been proposed，has been accomplished several years ago. In Deep-CPT, the method installing the reamer at specific position with special structure is one of the key technologies of deep cone penetration test. The method design，mechanism analysis and field test of the reamer are introduced in this paper.
Research conclusions:From the research on the application of reamer to Deep-CPT，the method installing the reamer in Deep-CPT has been proposed from references to the factor analysis of CPT and the reamer design ideas in exploration drilling and trenchless drilling. Through theoretical analysis，model tests and numerical analysis，the design of installing the reamer at 30cm position above the probe with fusiform structure has been accepted. The project examples prove that the reamer could expand hole to reduce side friction of cone rod and efficiently increase the depth of penetration test and have almost no effect on the results. Through contrast test，the test data after application of reamer matches up with the data of traditional CPT，the influence on test data of verifying the reamer development scheme is very small. In this paper, the application of reamer could give reference and guidance for the expansion of CPT and related equipment development.
|
|
Received: 03 March 2014
|
|
|
|
|
|
[1]陈新军，杨怀玉.-种深层静力触探测试方法[J].铁道工程学报，2010(12):289 -292.
Chen Xinjun, Yang Huaiyu. The Test Method of Deep- CPT[J].Journal of Railway Engineering Society, 2010(12);289-292.
[2]李鹏，许再良，李国和，等.软土地基静力触探机理分析 [J].铁道工程学报，2012(6):37-49.
Li Peng, Xu Zailiang, Li Guohe, etc. Mechanism Analysis of Cone Penetration Test in Soft Soils[J]. Journal of Railway Engineering Society, 2012 ( 6) ; 37- 49.
[3]铁道第三勘察设计院集团有限公司.深层触探土力学及其应用技术研究[R].天津:铁道第三勘察设计院集团有限公司，2012.
The Third Railway Survey and Design Institute Group Corporation. The Mechanism and Application of Deep Penetration Test[R].Tianjin; The Third Railway Survey and Design Institute Group Corporation, 2012.
[4]铁道第三勘察设计院集团有限公司.深层静力触探方法研究[R].天津:铁道第三勘察设计院集团有限公司， 2010.
The Third Railway Survey and Design Institute Group Corporation. The Research on Method of Deep Penetration Test[R].Tianjin; The Third Railway Survey and Design Institute Group Corporation, 2010.
[5]唐贤强，叶启民.静力触探[M].北京:中国铁道出版社，1983.
Tang Xianqiang, Ye Qimin. Cone Penetration Test [M].Beijing; China Railway Publishing House, 1983.
[6]高秀梅.原位测试技术在空客A320总装线项目勘察中的应用[J].铁道工程学报，2011(12);15-20.
Gao Xiumei. Application of Situ Tests in Geological Exploration of the Airbus A320[ J].Journal of Railway Engineering Society, 2011(12) ;15-20.
[7]Xinjun Chen, Shuli Sun, Xiaoli Pu. A new Rotary Penetration Sounding Device and Its Testing Method [C] //Geomechanics and Geotechnics:Fom Micro to Macro. CRC Press, 2010.
[8]唐贤强，谢瑛，谢树彬，等.地基工程原位测试技术 [M].北京:中国铁道出版社，1996.
Tang Xianqiang, Xie Ying, Xie Shubin, etc. In-situ Test on Foundation Engineering [M].Beijing; China Railway Publishing House, 1996.
|
|
|
|
2014, Vol. 31 
