SOIL CEMENT COLUMN APPLICATION FOR STABILIZED SOIL PROTECTION SYSTEMS IN DEEP EXCAVATION WORKS USING DIAPHRAGM WALLS: CASE STUDY

Chanchai Submaneewong — 2026-06-09

In deep excavation works within major urban areas particularly in Bangkok, the safety of soil protection systems is concerned. In addition, soil movement must be carefully controlled to prevent the impacts on adjacent nearby structures. Soil cement columns, an effective ground improvement technique, have been applied in underground construction to enhance stability and reduce soil displacement. This paper presents the design concept, construction techniques, and case studies of deep excavation projects where Diaphragm walls were stabilized with soil-cement columns. Two construction approaches are considered: 1) the arrangement of soil-cement columns to reduce active earth pressure, and 2) the arrangement of soil-cement columns to increase passive earth pressure. The study results indicate that the use of soil-cement columns can significantly reduce ground movements and enhance the safety of earth-retaining systems during deep excavation. Moreover, this method helps minimize the risk of damage to nearby structures.

Research Journal Phranakhon Rajabhat : Science and Technology

SOIL CEMENT COLUMN APPLICATION FOR STABILIZED SOIL PROTECTION SYSTEMS IN DEEP EXCAVATION WORKS USING DIAPHRAGM WALLS: CASE STUDY