[1] Chen Wenwu, Dai Pengfei, Zhang Jingke, et al. Stability monitoring and evaluation of the modeled test squarefor prehistoric earthen sites during excavation period [J]. Journal of Southeast University (English Edition), 2016, 32 (4): 464-471. [doi:10.3969/j.issn.1003-7985.2016.04.012]

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Stability monitoring and evaluation of the modeled test squarefor prehistoric earthen sites during excavation period()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

32

Issue:

2016 4

Page:

464-471

Research Field:

Publishing date:

2016-12-20

Info

Title:

Stability monitoring and evaluation of the modeled test squarefor prehistoric earthen sites during excavation period

Author(s):

Chen Wenwu¹;  2;  Dai Pengfei¹;  2;  Zhang Jingke¹;  2;  Chen Pengfei¹;  2;  Guo Qinglin³;  Sun Manli⁴

¹School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730030, China
²Key Laboratory of Mechanics on Disaster and Environment in Western China of Ministry of Education, Lanzhou University, Lanzhou 730030, China
³National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Dunhuang Academy, Dunhuang 736200, China
⁴School of Cultural Heritage, Northwest University, Xi’an 710069, China

Keywords:

prehistoric earthen sites;  archaeological excavation;  test square;  stability monitoring

PACS:

K854.1

DOI:

10.3969/j.issn.1003-7985.2016.04.012

Abstract:

In order to explore the stability of test square during archaeological excavation for prehistoric earthen sites in Hangzhou, a modeled test square with 2.3 m in depth, in-plane dimensions of 5 m in width by 5 m in length, and an archaeological column in the middle was excavated by means of a top-down excavation technique. To investigate the stability performance of the modeled test square and the associated effect on the adjacent area, a real-time comprehensive instrumentation program was conducted during the excavation. Field observations included ground settlements, lateral displacement, pore pressure and underground water level. Monitoring data indicates that the ground settlement induced by dewatering and unloading action basically decreases with the increase of the distance away from the pit edge, and the lateral displacements at four sides show a nonlinear variation along the depth. The maximum value is far below the acceptable value regulated by the related standard, which validates the stability of the modeled test square during excavation. Variations of pore pressure and water level suggest that long-term stability should be paid more attention due to the slow consolidation of soft soil. Meanwhile, it is proved that the step shape of the wall can resist lateral displacement more effectively than the vertical shape of wall. This case study provides insights into the real archaeological excavation in Hangzhou, in particular Liangzhu prehistoric earthen sites.

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Memo

Memo:

Biography: Chen Wenwu(1966—), male, professor, sungp@lzu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.51578272), the National Key Technology R& D Program of China during the Twelfth Five-Year Plan Period(No.2013BAK08B11).
Citation: Chen Wenwu, Dai Pengfei, Zhang Jingke, et al.Stability monitoring and evaluation of the modeled test square for prehistoric earthen sites during excavation period[J].Journal of Southeast University(English Edition), 2016, 32(4):464-471.DOI:10.3969/j.issn.1003-7985.2016.04.012.

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