The document is a presentation given by Carlo Esposito at the NHAZCA OPEN DAY event in Rome on January 31, 2013 about land subsidence in urban areas. It discusses investigating and monitoring subsidence to understand causes and address remedies. It provides examples of subsidence in Rome related to travertine quarries and thermal springs, and emergency remediation work including installing isolation systems and cutting old foundation structures. It also discusses better constraining the relationship between subsidence and piezometric variations.
1. NHAZCA OPEN DAY
ROMA
31 – 01 – 2013
Land subsidence in urban areas: investigation and monitoring for
understanding causes and addressing remediations
C. Esposito
Sapienza Università di Roma;
Centro di Ricerca CERI
Roma 31 – 01 – 2013 NHAZCA OPEN DAY CARLO ESPOSITO
2. Land subsidence in an urban settlement: human-induced stress factors
on a susceptible environment
Travertine
quarries
Thermal
springs
ERS (1992-2001) ENVISAT (2003-2010)
Legend
Velocità (mm/anno)
< -25.00
-24.99 - -10.00
-9.99 - -5.00
-4.99 - -3.00
-2.99 - -1.50
-1.49 - 1.50
1.51 - 3.00
3.01 - 5.00
5.01 - 10.00
10.01 - 25.00
>25.00
Roma 31 – 01 – 2013 NHAZCA OPEN DAY CARLO ESPOSITO
3. Emergency remediations and investigation on possible contributory
causes (at the basin scale)
Roma 31 – 01 – 2013 NHAZCA OPEN DAY CARLO ESPOSITO
4. FASE 8: Messa in carico del sistema di isolamento e
taglio delle vecchie strutture di fondazione
Messa in carico degli isolatori tramite martinetti piatti in asse
Rimozione del banchinaggio
Taglio dei vecchi pali di fondazione e dei micropali provvisionali
Roma 31 – 01 – 2013 NHAZCA OPEN DAY CARLO ESPOSITO
5. Emergency remediations and investigation on possible contributory
causes (at the basin scale)
W E
N
S
Roma 31 – 01 – 2013 NHAZCA OPEN DAY CARLO ESPOSITO
6. Is it possible to better constrain the relations with piezometric
variations?
Roma 31 – 01 – 2013 NHAZCA OPEN DAY CARLO ESPOSITO