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

info@travisbaker.co.uk

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: info@abbeypynford.co.uk

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.