Correlation Between the In-Situ Soil Conditions and Strength of Jet Grout Soilcrete by a Double-Fluid System

DOI

10.2991/978-94-6463-900-1_53How to use a DOI?

Keywords

Jet Grouting; Double-Fluid System; Standard Penetration Test (SPT) N-values; Unconfined Compressive Strength

Abstract

Achieving optimal unconfined compressive strength (UCS) of the soil-cement columns (soilcrete) in jet grouting is essential for ensuring structural stability; however, this goal is often complicated by the diverse soil characteristics encountered on-site. In fine-grained soils like silt and clay, high plasticity can produce poor mixing efficiency of the soil and grout as clays are likely to deform instead of disintegrating into smaller particles during the erosion stage of jet grouting, resulting in poorly formed soilcrete columns and weaker UCS values, while coarse soils like sand and gravel can complicate the consistency of the soilcrete mix. These variations across soil classifications make it challenging to predict and standardize the UCS result, impacting the reliability and overall effectiveness of jet grouting. In this study, data from various jet grouting projects using the double-fluid system within the Philippines are analyzed. Properties of the in-situ soil before the ground improvement are determined through Standard Penetration Tests (SPT) and laboratory tests. After the ground has been jet-grouted and cured, core samples of the formed soilcrete columns are sampled and have undergone unconfined compression tests. With the SPT N-value as one of the most widely used data in geotechnical engineering, this paper aims to establish its relationship with the unconfined compressive strength of the resulting soilcrete. Soils with higher N-values typically possess greater density and strength, providing a stable base that can yield higher UCS value, while soils with lower N-values often indicate loose or soft soils, which can result in weaker soilcrete strength. By establishing this relationship, the study seeks to improve the predictability of soilcrete performance, offering valuable insights for optimizing jet grouting designs and practices.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Carl Louis S. Guzman
AU  - Mikaela Angie P. Cruz
AU  - Marc Arthur Z. Go
AU  - Alexis Philip A. Acacio
AU  - Lestelle V. Torio-Kaimo
PY  - 2025
DA  - 2025/12/07
TI  - Correlation Between the In-Situ Soil Conditions and Strength of Jet Grout Soilcrete by a Double-Fluid System
BT  - Proceedings of the Rocscience International Conference 2025 (RIC 2025)
PB  - Atlantis Press
SP  - 531
EP  - 537
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-900-1_53
DO  - 10.2991/978-94-6463-900-1_53
ID  - Guzman2025
ER  -