Background Image
Previous Page  9 / 12 Next Page
Information
Show Menu
Previous Page 9 / 12 Next Page
Page Background

9

The BAUER Anchor

Suitability and

Acceptance Tests

Acceptance Test (DIN EN 1537 with DIN SPEC 18537 and DIN EN 1997-1:2009-09)

Local load test at each anchor to check the adherence of the design criteria.

Force displacement curve in exemplary suitability test of a

permanent anchor in non-cohesive soil

Force displacement curve in exemplary acceptance test of

a permanent anchor in non-cohesive soil

Load testing to confirm suitability of

planned anchor installation for exis-

ting soil conditions. The suitability

test is generally executed on anchors

which are permanent part of the

structure. A suitability test should be

done for all the different soil and be-

aring conditions at at least three an-

chors to determine the characteristic

pull out resistance.

If during a suitability test the criteria

ks = 2.0 mm is exceeded already at

a load level below proof level P

p

, the

admissible anchor force has again

to be determined for the anchors af-

fected by this suitability test, based

on the lowest test value. Otherwise,

further suitability tests have to be

executed (for example at anchors

with changed installation methods).

If during a suitability test the anchor

force is gradually increased until the

maximum pull out resistance is reached,

we talk about an exploration test.

Exploration tests for temporary and

permanent anchors and suitability

tests for permanent anchors can only

be controlled and assessed by an

authority presently approved for the

surveillance of anchor installation

(examination, surveillance and certifi-

cation authority).

After test completion the anchor is

specified with the determined load P

0

.

Suitability test (DIN EN 1537 with DIN SPEC 18537 and DIN EN 1997-1:2009-09)

Examination Test (DIN 1537 and DIN SPEC 18537)

Load test to identify the maximum

pull out resistance of an anchor at the

subsoil-grouting body-interface and

the anchor characteristics at the wor-

king load level. The anchor is loaded

to failure. This is defined by creep li-

mit ks = 2.0 mm. The examination test

is an extended suitability test which

is done in special cases if there is no

experience available about bearing

behavior of the anchors at similar soil

conditions and the anchors are thus

loaded until the maximum pull out re-

sistance is reached (failure in soil).

Separate test anchors are necessary

for this kind of test.

displacement

s

displacement

s

anchor force

P

a

P

a

0.4

P

p

0.4P

a

0

0

0.55

P

p

0.55P

a

0.7

P

p

0.7P

a

1.0

P

p

1.0P

a

0.85

P

p

0.85P

a

anchor force