Gravel foundation dynamic consolidation mechanism and experiment on consolidation effects(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2016年06期
- Page:
- 69-77
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Gravel foundation dynamic consolidation mechanism and experiment on consolidation effects
- Author(s):
- SONG Zhao-yang; JI Hong-guang; ZHANG Yue-zheng; ZHANG Lei
- 1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083,China; 2. State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China
- Keywords:
- civil engineering; high density resistivity; dynamic consolidation; earth pressure cell; foundation
- PACS:
- TU47
- DOI:
- -
- Abstract:
- Diameter of granular rock is relatively large and the gradation is poor after mountain cut blasting. The macro mechanical properties of dynamic consolidation of large diameter granular rock foundation are highly related to properties of granular rock. Based on the characteristics of mountain cut blasting gravel backfill foundation and the analysis of granular rock backfill foundation consolidation mechanism by using granular material mechanics theory, this paper adopted comprehensive using high density resistivity method, numerical simulation and burying earth pressure cell method to evaluate the effect of dynamic consolidation, and established the function relation of resistivity, compactness and bearing capacity. The results show that the resistivity of foundation is effective in judging the uniformity of foundation. The variation of resistivity before and after dynamic consolidation is used to determine the influence range of dynamic consolidation, and establish the relationship among resistivity, compactness and bearing capacity. Its correlation is used to establish the effective depth of gravel foundation and the applicable criterion of judgement. The analysis result of each pressure cell data is used to examine the effectiveness of gravel foundation with dynamic consolidation of high density resistivity. By using the distribution pattern of high density resistivity image, data of burying earth pressure cell, weight of the dynamic consolidation and its curve, the optimal dynamic consolidation parameter can be obtained, which provide references for optimization design of dynamic consolidation.
Last Update: 2016-12-02