Statistical Analysis of Bored Piles with Pile-Bottom Post Grouting

DOI

10.2991/mmme-16.2016.179How to use a DOI?

Keywords

bored pile; sediment; mudcake; post grouting; statistical analysis

Abstract

The statistics of cement consumption, bearing capacity, and settlements for pile-head and pile-toe are obtained by using the comparison of over 600 piles with or without grouting. The statistical results show that post grouting technique is most used in gravel and pebble stratum (taking up 67.8%), followed by silty sand (taking up 20.3%), and can also be used in silt and clay and bedrock. The post grouting technique is used in bedrock to solidify rock mass and sediment. By regression analysis of piles in gravel and pebble stratum or silt, the ce-ment consumption is found to be linear with the square of pile diameter. Enhancement coefficient of post grouting pile's bearing capacity is 1.25 in silt and clay, 1.31 in silty sand, 1.46 in gravel and pebble stratum, and 1.16 in bedrock, respectively. For piles with the same diameter, the improvement of bearing capacity in gravel and pebble stratum is the biggest. By post grouting, the settlements of pile-head and pile-toe can be re-duced by 24%~37% and 49%~78%, respectively.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - B.J. Li
AU  - H.M. Zang
AU  - G.H. Lv
PY  - 2016/10
DA  - 2016/10
TI  - Statistical Analysis of Bored Piles with Pile-Bottom Post Grouting
BT  - Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering
PB  - Atlantis Press
SP  - 746
EP  - 750
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmme-16.2016.179
DO  - 10.2991/mmme-16.2016.179
ID  - Li2016/10
ER  -