Att 3 - Landslide Risk Assessment

www.awgeotechnics.com.au

LYXXX/

AWGEOTECHNICS

 

 

If you plan to remove trees after the building is
constructed you should consult the designing
engineer an expert arboriculturist or a
geotechnical practitioner familiar with these
problems.

Tree roots in sandy areas rarely cause any
damage since sand does not shrink or swell,
however if the root ball or large root is very close
to a building it may grow and lift the footings of a
light structure. (Fig. 13)

Foundation problems in clay sites may also be
caused by:

*Excessive watering or under-watering of
gardens.

*Watering systems that are overused or
discharge water too close to building walls (Fig.
8)

*Constructing terraces, retaining walls or garden
walls without good drainage. (Fig. 10)

6. POOR SITE MAINTENANCE

The change of foundation soil moisture is by far
the greatest cause of building damage. Changes
of drainage or garden watering conditions in
adjoining properties can also create problems.

*A drainage system may be necessary if water
flows near the building. All possible water leaks
and sources should be repaired immediately,
e@g.:

*Leaking or blocked roof gutters which cause
water to overflow near building walls. (Fig. 14)

*Hot water systems relief valve pipes should be
discharged into storm water lines. (Fig. 15)

*Air conditioners operating during hot, humid
weather that discharge water near the building
footings. (Fig.16)

*Leaking or overflowing water tanks near building
footings. (Fig. 17)

*Land or paving that slopes towards the building
and cause rain water to flow near the building.
(Fig. 18)

* Water from the failure to repair plumbing leaks or
leaky taps, hoses or by regularly washing cars in
areas near building walls. (Fig. 19)

“Water flowing near buildings (even from
neighbouring properties) must be diverted away
from the footings or collected. (Fig. 20)

 

Fig. 13 Root Damage

 

Fig. 14 Overflowing roof Fig. 15 Common leak sour

Relief Valve

“No

  

 

Fig. 16 Air con, up to
35 Liday loss

Fig.17 Leaky pipe:

 

Fig. 18 Reverse Sloping paths

Fig. 20 Adjoining property water flows

Fig 19 Leaking tap

 

 

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be reproduced in any form or by any means, electronic, mechanic
or photocopying without the written permission of the publisher.

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Site Classification Report

 

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