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Scarica Il Documento INDICE 1 INTRODUZIONE ................................................................................................................................. 3 2 DESCRIZIONE DELLE ATTIVITA’ SVOLTE ..................................................................................... 4 2.1 RACCOLTA DEI DATI PREGRESSI ...................................................................................................... 4 2.2 FOTOINTERPRETAZIONE .................................................................................................................. 5 2.3 RILEVAMENTO ................................................................................................................................ 8 2.4 INDAGINI GEOGNOSTICHE ................................................................................................................ 8 2.4.1 Indagini bibliografiche pregresse ......................................................................................... 9 2.4.2 Indagini geognostiche pregresse (dal 1984 al 2004) ........................................................... 9 2.4.3 Indagini geognostiche progetto preliminare (2009) ........................................................... 10 2.4.4 Indagini geognostiche progetto definitivo 4^ corsia (2010) ................................................ 10 2.4.5 Indagini geognostiche Opere Compensative (2010) ......................................................... 11 2.5 ANALISI DELLE STRATIGRAFIE DEI SONDAGGI .................................................................................. 12 3 INQUADRAMENTO GEOLOGICO-STRUTTURALE ....................................................................... 13 4 STRATIGRAFIA ................................................................................................................................ 15 4.1 DEPOSITI ALLUVIONALI IN EVOLUZIONE (B1) ................................................................................... 17 4.2 SINTEMA EMILIANO - ROMAGNOLO SUPERIORE (AES): ..................................................... 17 4.2.1 SUBSINTEMA DI RAVENNA (AES8) ............................................................................... 17 4.2.1.1 UNITA’ DI MODENA (AES8a)........................................................................................................... 18 4.2.2 SUBSINTEMA DI VILLA VERUCCHIO (AES7) ................................................................. 18 4.2.2.1 UNITA’ DI VIGNOLA (AES7b) .......................................................................................................... 18 5 GEOMORFOLOGIA .......................................................................................................................... 19 5.1 INQUADRAMENTO GENERALE ......................................................................................................... 19 5.2 IDROGRAFIA ................................................................................................................................. 20 Spea – Ufficio Geologia 2 / 53 5.3 PIANO STRALCIO PER L’ASSETTO IDROGEOLOGICO (PAI) E PIANO TERRITORIALE DI COORDINAMENTO PROVINCIALE (P.T.C.P.) ........................................................................................................................... 20 5.4 SUBSIDENZA................................................................................................................................. 21 5.5 GEOMORFOLOGIA DI DETTAGLIO .................................................................................................... 26 5.5.1 Macroforme ........................................................................................................................ 27 5.5.2 Forme antropiche ............................................................................................................... 28 5.5.3 Altre forme di origine fluviale .............................................................................................. 31 6 CARTOGRAFIA TEMATICA E LEGENDE ...................................................................................... 33 6.1 GEOLOGIA .................................................................................................................................... 33 6.2 GEOMORFOLOGIA ......................................................................................................................... 35 6.2.1 Forme e depositi dovute a processi fluviali ........................................................................ 35 6.2.2 Forme e strutture di origine antropica ................................................................................ 35 6.2.3 Altri elementi ....................................................................................................................... 36 6.3 VINCOLI ....................................................................................................................................... 36 7 INQUADRAMENTO IDROGEOLOGICO GENERALE .................................................................... 37 8 ELEMENTI DI SISMICA GENERALE .............................................................................................. 41 9 DESCRIZIONE DEL TRACCIATO E DEGLI ELEMENTI DI MAGGIORE INTERESSE INGEGNERISTICO .................................................................................................................................... 46 9.1 DA INIZIO INTERVENTO FINO ALLA PROGR. KM 29+400 C.A. ............................................................. 46 9.2 DALLA PROGR. KM 29+400 C.A. ALLA PROGR. KM 36+600 C.A. ...................................................... 47 9.3 DALLA PROGR. KM 36+600 C.A. ALLA PROGR. KM 43+900 C.A. ...................................................... 48 9.4 DALLA PROGR. KM 43+900 C.A. ALLA PROGR. KM 46+700 C.A. ...................................................... 50 9.5 DALLA PROGR. KM 46+700 C.A. ALLA PROGR. KM 51+000 C.A. ...................................................... 50 9.6 DALLA PROGR. KM 51+000 C.A. A FINE INTERVENTO (KM 56+600) ................................................. 50 10 BIBLIOGRAFIA ................................................................................................................................ 52 Spea – Ufficio Geologia 3 / 53 1 INTRODUZIONE La presente relazione riguarda la porzione di territorio che ricade nella piana alluvionale appenninica tra Bologna (San Lazzaro) e Faenza, nell'ambito del progetto definitivo per la 4^ corsia dinamica (dal Km. 22+231 al Km. 29+500) e l’ampliamento alla 4^ corsia (dal Km. 29+500 al Km. 56+600) dell’Autostrada A14 Bologna – Bari - Taranto nel tratto Bologna San Lazzaro – diramazione Ravenna. Lo scopo del presente lavoro consiste nell'illustrare gli elementi geologici e geomorfologici utili a focalizzare i principali aspetti progettuali riconducibili alla natura ed alle caratteristiche dei terreni attraversati dal tracciato oggetto di studio. La morfologia pianeggiante che contraddistingue l’intera area di studio impone l’adozione di una metodologia per la ricostruzione dell’assetto geologico - stratigrafico differente da quella normalmente impiegata per zone collinari o montane. Il rilevamento di superficie, infatti, fornisce elementi significativi solo nei rari punti in cui incisioni fluviali o scarpate antropiche (cave, sbancamenti per opere edili, etc.) mettono a nudo “spaccati stratigrafici”, mentre assumono grande rilevanza le verticali di indagine eseguite in sito (sondaggi geognostici, pozzi per acqua, ecc.), che consentono una interpretazione dei depositi del sottosuolo al di sotto del terreno di coltivo o di riporto. Gli elementi utilizzati per la redazione della planimetria geologica-geomorfologica redatta in scala 1:5000 e del profilo geologico longitudinale redatto in scala 1:5000/500 e scala 1:5000/5000 sono stati ricavati essenzialmente dall’analisi critica dei dati bibliografici e dall’esame di tutte le stratigrafie disponibili (pozzi, indagini pregresse e sondaggi appositamente realizzati). Spea – Ufficio Geologia 4 / 53 2 DESCRIZIONE DELLE ATTIVITA’ SVOLTE Di seguito vengono elencate tutte le attività conoscitive svolte per la redazione del presente studio. 2.1 RACCOLTA DEI DATI PREGRESSI Sono stati acquisiti dati/pubblicazioni dalle seguenti fonti: • Servizio Geologico della Regione Emilia – Romagna: 1) cartografia geologica (progetto CARG); 2) Carta Sismotettonica della Regione Emilia - Romagna alla scala 1:250.000; 3) Carta Geologica d’Italia 1:100.000, fogli 87 (Bologna) e 88 (Faenza); 4) carta dei suoli della pianura emiliano-romagnola in scala 1:50.000; 5) stratigrafie sondaggi, pozzi pubblici e privati, prove penetrometriche ad uso privato; • Società Geologica Italiana; • ARPA Regione Emilia Romagna: 1) dati di monitoraggio piezometrico dei punti di controllo regionale; 2) Caratteristiche dell’Acquifero della Regione Emilia-Romagna – Report 2003); • SIT – Servizio Informativo Territoriale della Provincia di Bologna; • SIT – Servizio Informativo Territoriale della Provincia di Ravenna; • SIT – Servizio Informativo Territoriale del Consorzio di Bonifica della Romagna Occidentale • Piano Territoriale di Coordinamento Provinciale (PTCP) Provincia di Bologna • Piano Territoriale di Coordinamento Provinciale (PTCP) Provincia di Ravenna • Piano Strutturale in Forma Associata (Comuni di Ozzano dell’Emilia, San Lazzaro di Savena ed altri) • Piano Regolatore Generale (PRG) del Comune di Castel San Pietro Terme Spea – Ufficio Geologia 5 / 53 • Piano Regolatore Generale (PRG) del Comune di Dozza • Piano Regolatore Generale
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