Ground Reinforcement and Rehabilitation of Foundations Systems for Their Reuse

• Type: Chapter or Part of a Book
• Date: 2018-01-02

Authors

A. Viana da Fonseca (Author) FEUP; A. Pinto (Author) Other

Book

Title: Strengthening and Retrofitting of Existing Structures

Pages: 273-299

ISBN: 9789811058578

Electronic ISBN: 9789811058585

Indexing

ISI Proceedings

Other information

Authenticus ID: P-010-YD8

DOI: 10.1007/978-981-10-5858-5

Abstract (EN): The reuse of foundations for a second superstructure is technically feasible and is increasingly becoming part of standard practice. For refurbishment projects, reuse of old foundations and structures is the norm. For foundation reuse to be viable, the following conditions need to be satisfied: (i) there should be compatibility between the locations of the applied loads and the existing foundations, which should have sufficient bearing capacity to carry the new loads; (ii) sufficient verification should be carried out so that the old foundations are shown to be as reliable as new ones; (iii) there should be an expectation that the foundation performance over the range of expected loads will be acceptable, and that they will fulfil those functions reliably over the planned design life of the building; (iv) the project team needs to agree that all parties accept the risks associated with foundation reuse; (v) adequate insurance cover is available for the design team and client; (vi) regulatory approval is possible from the necessary authorities. Currently old foundations tend only be reused in a redevelopment, if there is a particular constraint that acts as a driver: (i) the ground beneath the building has already been filled; (ii) there are archaeological remains that can be preserved by foundation reuse. One of the main inhibitors to foundation reuse is uncertainty: unless records have been kept that indicate the foundation locations, sizes and capacities with a high degree of reliability, it can be difficult to reuse them reliably or efficiently. Therefore one important issue to maximize the future ability to reuse foundations is the collection and safe preservation of construction and maintenance records. When the risk to full trust on the original foundations is high, ground improvement techniques are advisable, mainly versatile and small diameter drilling techniques as jet grouting and micropiles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 27