Abstract
The problem of strengthening weak or overloaded bases is an important objective of underground space development. It is especially urgent if there are alternating weak layers in the base. The paper presents a practical geotechnical case of strengthening the overloaded base of a reinforced concrete foundation plate for a 25-storey residential building under construction. Combined soil piles that consist of Jet (type 1) soil concrete piles reinforced along the longitudinal axis with drilled injection piles made by electric discharge technology (EDT piles) are used as buried structures. This method of arrangement of a combined buried reinforced concrete structure is conditioned by the need to increase the load-bearing capacity of a pile in soil by two or more times.
Highlights
Modern geotechnical construction shall comply increased requirements [1-4], which is justified in most cases
It is often impossible to reach design values of the base load-bearing capacity using existing geotechnical technologies. Their combination makes it possible to build an underground structure with increased load-bearing capacity and thereby to solve most of the problems that arise both in the course of construction and during the facility operation
We applied reinforcement based on the technology proposed in [5-12], which is a synthesis of 3 geotechnical technologies: 1. Jet-technology. It is soil-cement pile installation according to CR (Construction Rules) 291.1325800.2017 Reinforced soil-cement structures
Summary
Modern geotechnical construction shall comply increased requirements [1-4], which is justified in most cases. It is often impossible to reach design values of the base load-bearing capacity using existing geotechnical technologies. Their combination makes it possible to build an underground structure with increased load-bearing capacity and thereby to solve most of the problems that arise both in the course of construction and during the facility operation. The example of strengthening the base of a reinforced concrete slab foundation of a multistorey residential building is given below
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