CASE STUDY
Bampton Meadows
TP
TP
TP
TP
TP
TP
TP
TP
68.031
Ht.
67.325 67.286
68.70768.586
68.583
68.477
BH01
3.10mSand &
Gravel
BH02
2.0mSand &
Gravel
BH03
4.20mClay
TP011.60mSand &
Gravel
TP05>
2.75m
TP04>
3.20m
TP032.50mSand &
Gravel
TP021.60mSand &
Gravel
TP082.60m
Sand &
Gravel
TP071.60mSand &
Gravel
TP062.0mSand &
Gravel
CLIENT
DRAW
NAU
THO
RISEDSCALE
DATE
PROJECT N
O.
DRAW
ING
NO
.REV
TAYLOR W
IMPEY
OXFO
RDSH
IRE
MS
DW
1:500@A0
25/06/19
190411000
-
Travis Baker Ltd
Trinity PointN
ew Road
Halesow
enW
est Midlands
B63 3HY
Tel:0121 550 8037
Fax:0121 550 8047
ww
w.travisbaker.co.uk
PROJECT
ASTON
ROAD
,BAM
PTON
TITLE
FOU
ND
ATION
ZON
ING
PLAN
STATUS.
TEND
ERCO
PYRIGH
T TRAVIS BAKER LIMITED
. ALL RIGH
TS RESERVED.
1.D
O N
OT SCALE FRO
M TH
IS DRAW
ING
. IF IN D
OU
BT CON
TACT TRAVIS BAKER LIMITED
.2.
ALL DIM
ENSIO
NS ARE IN
MILLIM
ETRES UN
LESS OTH
ERWISE N
OTED
.3.
THIS D
RAWIN
G IS TO
BE READ IN
CON
JUN
CTION
WITH
ALL OTH
ER RELEVANT
DRAW
ING
S RELATING
TO TH
IS PROJECT.
4.ALL D
IMEN
SION
S SHO
ULD
BE CHECKED
ON
SITE PRIOR TO
CON
STRUCTIO
N. AN
YD
ISCREPANCIES SH
OU
LD BE IM
MED
IATELY NO
TIFIED IN
WRITIN
G TO
TRAVIS BAKERLIM
ITED.
5.TH
E CON
TRACTOR SH
ALL PRIOR TO
CON
STRUCTIO
N CH
ECK AND
VERIFY THAT TH
ED
ETAILS SHO
WN
ON
THIS D
RAWIN
G ARE FU
LLY COM
PATIBLE WITH
ANY AS
CON
STRUCTED
DIM
ENSIO
NS O
R LEVELS. ANY D
ISCREPANCIES TO
BE REPORTED
IMM
EDIATELY IN
WRITIN
G TO
TRAVIS BAKER LIMITED
.6.
THIS D
RAWIN
G H
AS BEEN PREPARED
FOR TH
E EXCLUSIVE U
SE OF TH
E COM
MISSIO
NIN
GPARTY AN
D U
NLESS AG
REED IN
WRITIN
G BY TRAVIS BAKER LIM
ITED N
O O
THER PARTY
MAY U
SE OR RELY O
N ITS CO
NTEN
TS. NO
LIABILITY IS ACCEPTED BY TRAVIS BAKER
LIMITED
FOR AN
Y USE O
F THIS D
RAWIN
G O
THER TH
AN FO
R THE PU
RPOSE FO
R WH
ICHIT W
AS ORIG
INALLY PREPARED
.7.
IT SHO
ULD
BE NO
TED TH
AT THIS D
RAWIN
G M
AY INCLU
DE D
ATA PROVID
ED BY TH
IRDPARTIES. N
O LIABILITY IS ACCEPTED
BY TRAVIS BAKER LIMITED
AS TO TH
E ACCURACY
OF TH
IS DATA.
8.TH
IS DRAW
ING
SHALL N
OT BE REPRO
DU
CED IN
ANY W
AY WITH
OU
T THE W
RITTENPERM
ISSION
OF TRAVIS BAKER LIM
ITED.
REVD
ESCRIPTION
DATE
BYAU
TH
2.5m D
EEP
2.0m D
EEP
TREE INFLU
ENCE CIRCLES
MED
IUM
SHRIN
KABLE SOILS
0.9m D
EEP
1.2m D
EEP
1.5m D
EEP
TREE CIRCLES
SHO
WN
ARE
IN
ACCORD
ANCE
WITH
N
HBC
STAND
ARDS CH
APTER 4.2 "BUILD
ING
NEAR TREES"
WH
ERE GRO
UN
D LEVELS ARE TO
REMAIN
THE SAM
E OR
ARE TOBE RAISED
:TREE
CIRCLES SH
OW
N
IND
ICATE M
INIM
UM
D
EPTH
OF
FOO
TING
S BELOW
EXISTING
GRO
UN
D LEVELS.
WH
ERE GRO
UN
D LEVELS ARE TO
BE REDU
CED:
TREE CIRCLES
SHO
WN
IN
DICATE
MIN
IMU
M
DEPTH
O
FFO
OTIN
GS BELO
W PRO
POSED
GRO
UN
D LEVELS.
MIN
IMU
M FO
UN
DATIO
N D
EPTH TO
BE 0.90m IN
ACCORD
ANCE
WITH
NH
BC STAND
ARDS FO
R MED
IUM
SHRIN
KABLE SOILS.
DEPTH
S IND
ICATED ARE G
IVEN AS A G
UID
E ON
LY.
WH
ERE FOU
ND
ATION
S DEPTH
S DU
E TO TREES EXCEED
1.5mD
EEP, CLAY HEAVE PRECAU
TION
S WILL BE REQ
UIRED
. REFERTO
RELEVAN
T FO
UN
DATIO
N
SECTION
S AN
D
PLANS
FOR
DETAILS.
ZON
E OF
TREE INFLU
ENCE
STRIP/TRENCH
FILL FOU
ND
ATION
S
PILED FO
UN
DATIO
NS BY O
THERS
FOU
ND
ATION
TYPE KEY:
-
Located on a floodplain, comprised of soft alluvial deposit overlying mudstone, with high sulfate levels, this site came with multiple challenges.
The original scheme proposed driven steel tubes supported by ground beams. This was specified due to the interpreted sulfate levels, which was believed to be high enough to erode concrete piles over time. However, this scheme was not cost-effective and reduced project viability.
SulfatesOur first step was to review the SI report. Our engineers reviewed the data and deemed the sulfate levels to be lower than originally thought. Based on this insight, we proposed our non-voided system, using CFA piles. By opting for this type of piling we limited the amount of oxidation as CFA piles are formed in minutes. Rather than open bore piling or trench foundations, which greatly disturb the
Name: Brampton MeadowsLocation: Bampton, Oxfordshire Value: £770,000 Site size: 73 units / 1,480m2 Duration: 20 weeks Client: AgeturDeveloper: Taylor Wimpey
Reduced level dig and
pile formers set out. Ready for CWS pour.
Pour of CWS.
system, we could use our low track pressure midi piling rigs. This allowed the fill material to be changed to an engineered sub-soil. Although using engineered sub-soil would usually require a top layer of crushed fill to prevent surface degradation caused by the piling rigs, we were able to use our Concrete Working Surface (CWS) instead. As the compliant bid opted for using a 500mm piling mat, our CWS added to the material cost savings.
Tree InfluenceThe final challenge of this site was the presence of trees. This was tackled on the original scheme by allowing for heave precautions in these areas. As part of our value engineering process, our engineers noted that the soft alluvial chalk mitigated any risk of heave posed by the tree roots. We were able to liaise with the NHBC on behalf of our client and gain approval to mitigate any heave precautions and use our non-voided Housedeck system.
ground and allow oxidation to occur over days. This is an important design feature as the more the ground is oxidised the greater the activation of the
sulfates, which increases the degradation of the concrete. We also used sulfate resistant concrete to counter the sulfate’s erosive effects.
Switching from steel tubes to CFA piles resulted in large savings for our client.
FloodplainTo mitigate the flood risk the site levels need to be raised. Due to the soft alluvial deposits,
overlying mudstone ground conditions, an engineered solution was required. To raise the site levels, while facilitating the requirements of the piling rigs, a significant amount of crush
material would have needed to be imported. However, due to the design of our Housedeck
Piling and raft build complete. Ready for concrete pour.
Get in touch to discuss your project requirements:e: [email protected]
t: 01442 212112 abbeypynford.co.uk
“Abbey Pynford’s simple but technically insightful scheme helped us avoid an over-engineered design, saved us money and increased the project’s viability”David Beech, Senior Infrastructure Manager, Taylor Wimpey
“Abbey Pynford`s innovative approach helped us deliver this project for the client.”Sam James, Technical Director, Agetur
“Abbey Pyford’s technical assistance on this project was very valuable and helped keep the project running smoothly.”Holly Spense, Technical Coordinator, Taylor Wimpey
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Post pour, concrete curing. Once complete the slabs are
ready for masonary work.