HOME
KOREAN
ENGLISH
 

Test location : Construction site for a railroad base in Munsan, KyungGiDo
Test materials : Decomposed granite soil, Rubble, Ballast rubble
Testing organization : Korea Institute of Construction Technology


Classification
/Test methods
ASTM D 5818-95
FHWA
GSI-GG4
Sample size
More than 60 times of the combined size of indoor test samples
(Minimum area : 10m²)
Minimum area : 5m×3m
Minimum area : 10m²
Roadbed arrangement
Same as when preparing for a real structure
Flat and relatively incompressible roadbed
Depending on the site conditions
Compactionconditions
Same as when preparing for a real structure
At least 96% relative compaction
Maximum number:10
Depending on the site conditions
Types of tensile strength test
Multi-rib tensile strength test
Multi-rib or single-rib tensile strength test
Number of samples
9, at least
(Additional test with over 5% of deviation, maximum number of sample:1)
One-way geogrid:
30 in the warp direction
Two-way geogrid:
20 in the warp direction

Max. particle diameter
19mm
Composition(%) Ballast
Sand
Silt .Clay
25.2
73.0
1.8
FieldHardening density
(g/cm³)
1.84
Soil classification(Uniform classification method)
SW
Relative hardening(%)
95
Max. particle diameter
40mm
Composition(%) Ballast
Sand
Silt .Clay
33.7
63.6
2.7
FieldHardening density
(g/cm³)
1.89
Soil classification(Uniform classification method)
SW
Relative hardening(%)
Execution depending on the site conditions
Max. particle diameter
60 mm
Composition(%) Ballast
Sand
Silt .Clay
37.7
59.6
2.7
FieldHardening density
(g/cm³)
1.97
Soil classification(Uniform classification method)
SW
Relative hardening(%)
102
Max. particle diameter
80mm
Composition(%) Ballast
Sand
Silt .Clay
43.3
53.1
3.6
FieldHardening density
(g/cm³)
1.91
Soil classification(Uniform classification method)
SW
Relative hardening(%)
99

Sieving to adjust the composition of fill materials Spreading fill materials at the bottom

Hardening fill materials at the bottom

Spreading geogrid

Spreading fill materials on the top over the layer of geogrid
Hardening fill materials on the top

Measuring field hardening density after hardening process Extracting geogrid

Washing extracted geogrid sample

Examining the geogrid sample with the naked eye


※ Results of multi-rib tensile strength test after installation resistance test
     (Max. particle diameter 19mm Decomposed granite soil)

항목
TOTOGRID 4T
TOTOGRID 7T
TOTOGRID 10T
시험횟수
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
1
5.09
6.8
8.42
5.6
11.65
6.2
2
5.37
6.1
8.21
5.7
11.16
6.0
3
5.00
6.0
8.07
5.6
10.53
6.7
4
5.39
6.9
8.31
6.4
11.43
6.5
5
5.15
6.9
8.24
5.6
40.59
6.3
평균
5.20
6.5
8.25
5.8
11.07
6.4
강도감소율(%)
1.3
0.7
0.3

※ 내시공성 시험후 광폭인장강도시험 결과(최대입경 40mm 화강풍화토)

항목
TOTOGRID 4T
TOTOGRID 7T
TOTOGRID 10T
시험횟수
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
1
4.98
6.8
8.25
6.9
11.06
6.8
2
5.16
7.4
7.89
5.8
11.23
7.4
3
5.39
7.2
8.19
6.0
11.04
6.9
4
5.35
7.7
8.76
7.0
11.04
7.1
5
5.16
7.48
8.07
6.5
11.03
7.3
평균
5.12
7.3
8.23
6.4
11.03
7.0
강도감소율(%)
1.4
0.9
0.6

※ 내시공성 시험후 광폭인장강도시험 결과(최대입경 60mm 화강풍화토)

항목
TOTOGRID 4T
TOTOGRID 7T
TOTOGRID 10T
시험횟수
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
1
5.02 5.9 7.89 9.5 11.09 7.1
2
5.10 6.5 8.06 6.5 10.78 67.4
3
4.98 6.0 7.91 6.6 11.12 6.9
4
4.98 6.0 8.32 6.7 11.07

7.4

5
4.89 6.8 7.69 6.1 10.80 7.1
평균
5.01 6.4 7.97 6.5 10.97 7.2
강도감소율(%) 5.0 4.0 1.2

※ 내시공성 시험후 광폭인장강도시험 결과(최대입경 80mm 화강풍화토)

항목
TOTOGRID 4T
TOTOGRID 7T
TOTOGRID 10T
시험횟수
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
1
5.40 6.6 8.15 6.5 10.87 7.2
2
5.07 6.5 8.12 6.9 10.82 7.4
3
5.06 6.5 7.73 6.8 10.92 7.5
4
4.65 6.2 7.74 5.7 10.92 7.3
5
4.65 6.2 7.70 6.6 11.12 7.1
평균
5.03 6.5 7.89 6.5 10.93 7.3
강도감소율(%) 4.6 5.0 1.6

하부 쇄석 포설
및 다짐
지오그리드 포설

상부 쇄석 포설

상부 쇄석 다짐

지오그리드 추출
       
지오그리드 세척
       

※ 내시공성 시험후 광폭인장강도시험 결과(25mm 쇄석)

항목
TOTOGRID 4T
TOTOGRID 7T
TOTOGRID 10T
시험횟수
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
1
5.05 6.3 8.25 6.7 10.69 7.3
2
4.78 5.6 7.77 6.1 10.28 6.8
3
4.94 5.6 8.00 6.4 10.55 6.8
4
5.22 6.2 7.83 5.7 10.62 6.7
5
4.97 6.7 7.55 5.46 10.94 7.0
평균
4.99 6.1 7.88 6.1 10.62 7.9
강도감소율(%) 5.1 5.4 4.4

※ 내시공성 시험후 광폭인장강도시험 결과(25~60mm 쇄석)

항목
TOTOGRID 4T
TOTOGRID 7T
TOTOGRID 10T
시험횟수
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
광폭인장강도
(t/m)
인장변형율
(%)
1
3.35 4.2 4.38 3.2 7.13 1.9
2
4.1 5.09 4.4 7.93 3.4 3.27
3
3.27 4.4

5.09

6.1 7.48 3.5
4
2.58 3.0 5.86 4.9 7.18 1.3
5
3.30 4.7 4.78 3.83 7.26 3.5
평균
3.13 4.1 5.13 4.5 7.40 2.7
강도감소율(%)

40.5

38.2 33.4
 
Head office : 1214, Garak-daero, Gangseo-gu, Busan, Republic of Korea       Tel : 070-4827-4066       Fax : 055-346-1724
Branch(factory) : 103-63, Gomo-ro 324beon-gil, Jillye-myeon, Gimhae-si, Gyeongsangnam-do, Republic of Korea       
                          Tel. 82-55-346-1722~3    l   Fax. 82-55-346-1724    l   E-mail. totogrid@naver.com
Copyright(c)2005-2017 TOTOGRID.COM All rights reserved.