Analysis of the application efficiency of the slab-pile foundation using the example of a two-layer base

Dmitry Chunyuk,Serafima Selviyan,Artem Selviyan,P Akimov,A Doroshenko,N Vatin,A Tusnin

doi:10.1051/e3sconf/202126302034

Dmitry Chunyuk, Serafima Selviyan + Show 5 more

Open Access

https://doi.org/10.1051/e3sconf/202126302034

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Abstract

The purpose of this work was to determine the increase of the limit load when resting the foundation slab on the ground at a different pitch of piles and their different length. The main task is to calculate the combined pile-slab foundation. The hypothesis was that when the foundation slab in the work, the bearing capacity of the entire structure increases. This foundation was calculated using the Plaxis 3D design software complex. In this article, we have determined the value by which the ultimate load on the combined pile-slab foundation increases when the slab rests on soil.

Highlights

Combined pile-slab foundation - is a foundation in which part of the load is transmitted through through the sole of the slab grillage, and part of the load directly through the piles
CPS can be used only under a condition if the base of pile bushes and of piles fields is composed of either dense sand and medium-density sands or clay soils with flow index IL not more than 0.5 and deformation modulus E > 8 MPa. If these conditions are not met the foundation is considered as a pile with a slab grillage
Since pile foundations are used in weak soils, we have modeled the following soil conditions: The upper layer is high-mineral sapropel with the following strength and deformation characteristics: Table 1

Summary

Introduction

Combined pile-slab foundation - is a foundation in which part of the load is transmitted through through the sole of the slab grillage, and part of the load directly through the piles. This type of foundations is used to reduce the total and uneven precipitation of buildings and structures. The calculation of the combined pile-slab foundation can be carried out using both geotechnical programs based on numerical modeling, as well as slabs on an elastic base using a variable in plan coefficient of elastic ground resistance, the mean value of which can be assigned both from a spatial nonlinear calculation and by solving an axisymmetric problem for a cell including a pile and its surrounding soil mass.

Calculation of combined pile-slab foundation

Calculation of bored piles

Findings

Conclusions