H2020Индивидуална стипендия2018–2020

TUBEURB · Tunnelling beneath piled structures in urban areas

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-10-01 → 2020-09-30
Финансиране от ЕС: 158 122 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Влиянието на копаенето на тунели върху сгради с пилонови основи и плитки фундаменти се анализира чрез математически модели. Това помага на инженерите да оценят рисковете от повреди и да подобрят безопасността на градската инфраструктура.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Tunnelling beneath piled structures in urban areas

The provision of effective infrastructure systems (transport, power, water, waste) is something most people take for granted, yet its importance is paramount when considering public safety and economic growth. Furthermore, the increase in urban growth, which could reach 70% in 2050, is leading to increased demand for underground infrastructure systems (railways, metros, etc.). Underground infrastructure systems provide sustainable solutions in large cities that help to optimise the use of surface spaces and minimise pollution; however, they also require the construction of new tunnels (tunnelling), deep-excavations and shafts that cause ground movements, which raise concerns related to serviceability and safety of existing buildings, pipelines, tunnels, and other infrastructure in congested urban areas. The project main aim was to developed simplified numerical solutions, implemented in MATLAB scripts, that will benefit engineers that need to assess the risk of tunnelling in urban areas during their design of underground construction. In particular, soil-structure interaction models were developed that allow estimating the response of pile groups and piled structures to external actions and tunnelling-induced ground movements, with a focus on predicting foundation and structure distress/damage. Also, design-charts are proposed to facilitate the quick exploitation of research outcomes in practice. Although the original research proposal aimed to focus on tunnelling beneath piles and piled structures, the project was expanded towards the investigation of the following thematic areas, always related to urban tunnelling: i) the response of buildings on shallow foundations to tunnelling in urban areas; ii) deep-excavations next to pile foundations; iii) distortions and movements of existing tunnels and utility pipelines due to underneath tunnelling.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

In urban areas, tunnels for infrastructure and services are increasingly important. The project aims to develop numerical solutions of tunnelling beneath buildings and bridges supported by pile and piled raft foundations, focusing on structural deformations and reductions of pile capacity. The effect of compensation grouting is also addressed to optimize its design and minimize its risks. Two novel simulation approaches are proposed to account for both stress variations and movements within the soil caused by pile installation, tunnelling and grouting: 1) a simplified formulation, with low computational costs, that combines analytical two-stage analysis methods with cavity theory and nonlinear pile-soil load transfer mechanisms; 2) the Particle Finite Element Method (PFEM) model to accurately model the entire soil-structure domain. An online damage assessment system is proposed to facilitate the implementation of outcomes in the construction and educational sectors. Prof Jimenez, highly skilled in numerical and analytical methods for tunnelling engineering, will guide the fellow to the delivery of the simplified solutions. The CIMNE research team, world-leader in development of PFEM, will lead the researcher to implement the advanced numerical models. Partner organisations will provide experimental data from high-gravity tests and field measurements for validation; in particular, the industrial partner will guarantee that this research tackles real-world engineering. The experienced researcher, specialised in two-stage solutions and experimental testing of tunnel-structure interaction, will acquire new computational and theoretical skills in a wide variety of approaches while enhancing his mentoring and teaching capability. The end-users will have full access to results and developed models; this will maximise academic impact and it will help the construction sector to deliver more cost-effective and sustainable tunnelling projects, with benefits for the society.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSIDAD POLITECNICA DE MADRID · MadridКоординаторИспания