30067_001_021 - Chiltern District Council

HS2 PROPOSED DESIGN (SHOWING 3 VERTICAL ALIGNMENTS)
H1:50 000 V 1:500
Gerrards Cross Gravel
Shardeloes
Lake
Beaconsfield
Gravel
River
Misbourne
LMBE
f?
SNCK
f?
SNCK
f?
f?
f?
f?
LECH/LESE
f?
f?
f?
CKR
CKR
f?
SNCK
LMBE
Upper Misbourne
Valley Floor
River
Misbourne
Clay-with-Flints
LMBE
Possible Zone of
Slope Instability
Clay-with-Flints
GREEN TUNNEL
NPCH/HNCK
f?
WZCK
LECH/LESE
GREEN TUNNEL
WZCK
GLT/GUGS
NPCH/HNCK
f?
f?
GLT/GUGS
WZCK
MR
GLT/GUGS
f?
f?
f?
f?
f?
f?
f?
f?
f?
f?
f?
POST
POSA
ALV
HEAD
ALV
HEAD
HEAD
HEAD
CWF
HEAD
HEAD HEAD
HEAD
BDGR
HEAD
CKR
LMBE
LMBE
LC
WIHG
HEAD
HEAD
HEAD
GCGR
BDGR
LC
WIHG
HEAD HEAD
ALV
HEAD
CKR
ALV
PB
RTD1
KC RTD1
CWF
PB
RTD1
PB
HEAD
LASI
WIHG
PL
HEAD
ALV
ALV
NPCH
CWF
SNCK
GCGR
LECH
BDGR
SHGR
LESE
CWF
EXISTING GROUND PROFILE
CWF
CKR
HNCKCKR
LMBE
HEAD
SHGR
SHGR SHGR
PROPOSED VERTICAL PROFILE
HEAD1
PROPOSED PORTAL LOCATION
CKR
GROUNDWATER PROFILE
INTERPRETED FROM BGS 1984
1:100,000 HYDROGEOLOGICAL
MAP OF THE AREA BETWEEN
CAMBRIDGE AND MAIDENHEAD)
HEAD
NPCH
HEAD
SHGR
CKR
CWF
CWF
HNCK
HNCK
LMBE
PLAN/SECTION KEY
WZCK
HNCK
GCGR
HEAD
MR
CWF
TPGR
GCGR
GUGS
CKR
CWF
HEAD
BDGR
GCGR
SHGR
ALV
SHGR
SHGR ALV
ALV
ALV
SHGR
SHGR
SHGR
SHGR
HNCK
HEAD
CKR
SNCK
SNCK
POSA
HEAD1
WGGR
LMBE
LEC
CKR
HEAD
GCGR
WHS
HEAD
H
LMBE
LMBE
TPGR
HNCK
PB
POST
HEAD
GLT
LESE
HEAD
LGS
LGS
ALV
CWF
HEAD
ALV
LGS
HEAD
RTD1 RTD1
LECH
HEAD
PB
WHS
LESE
HEAD
SNCK
CWF
WHS
GLT
HEAD
CWF
CWF
KC
POSA HEAD
HEAD
CWF
KC
HEAD
SNCK
SHGR HEAD
SHGR
LECH
BDGR
RED ROUTE TUNNEL FOR HS2
LMBE
ALTERNATIVE TUNNEL OPTION
GEOLOGICAL SEQUENCE- SOLID GEOLOGY
GEOLOGICAL SEQUENCE- SUPERFICIAL GEOLOGY
GEOHAZARD CONSIDERATIONS
f?
PALAEOGENE
LMBE
ALV
CRETACEOUS
SNCK
LECH
LESE
CKR
SEAFORD CHALK FORMATION
LEWES NODULAR CHALK FORMATION
Including
CHALK ROCK MEMBER
NPCH
NEW PIT CHALK FORMATION
HNCK
HOLYWELL NODULAR CHALK FORMATION
MR
WZCK
Including
MELBOURN ROCK MEMBER
ZIG ZAG CHALK FORMATION
WEST MELBURY MARLY CHALK FORMATION
Possible Fault Location
MADE GROUND
LAMBETH GROUP
HEAD
HEAD1
Mark Revision
CWF
CLAY-WITH-FLINTS
WHG
WINTER HILL GRAVEL
GCGR
GERRARDS CROSS GRAVEL
Theoretical base level of chalk dissolution
assuming a penetration depth of 50m below
the Palaeogene/Chalk interface.
BDGR
BEACONSFIELD GRAVEL
WGGR
WESTLAND GREEN GRAVEL
Mining Cavities
GUGS
GLT
user name: david cotton
UPPER GREENSAND FORMATION
GAULT FORMATION
HS2 CHILTERN TUNNEL ALTERNATIVES
FEASIBILITY STUDY
SCHEMATIC GEOLOGICAL CROSS SECTION
AND PLAN FOR HS2 PROPOSED OPTIONS
Theoretical base level of disturbance to the
chalk resulting from periglacial weathering and
dissolution along the fault planes and valley
floors resulting in increased transmissivity in
the chalk below valley floors (assuming up to
50m below floor level is possible).
Natural Cavities
Chkd
Drawing Issue Status
Theoretical base level of chalk dissolution
assuming a penetration depth of 50m below
the Clay-with-Flints/Chalk interface.
Pre-Diversionary
Proto-Thames
River Terrace Deposits
Date
SCALING NOTE: Do not scale from this drawing. If in doubt, ask.
UTILITIES NOTE: The position of any existing public or private sewers, utility services, plant or apparatus shown on this
drawing is believed to be correct, but no warranty to this is expressed or implied. Other such plant or apparatus may also
be present but not shown. The Contractor is therefore advised to undertake his own investigation where the presence of
any existing sewers, services, plant or apparatus may affect his operations.
ALLUVIUM
HEAD DEPOSITS
Drawn
Client
CHILTERN DISTRICT
COUNCIL
Data locations derived from
the PBA Natural Cavities
and Mining Cavities Databases
Date of 1st Issue
04.04.2014
A1 Scale
Drawn by
davco
1:50000
CNE
Drawing Number
GEOLOGY BASED ON BGS 1:10 000 DIGIMAP DATA
AS SUPPLIED BY EMAPSITE (2014)
Offices throughout
the UK and Europe
Checked by
30067/001/021
www.peterbrett.com
Revision
0
© Peter Brett Associates LLP
READING
Tel: 0118 950 0761
File Location: j:\30067 hs2 through chilterns\drawings, pdfs, gis, photos and video\cad\dwgs\geology (dc).dwg