Soil Improvement Method Using Arching Effect
(Honeycell)
Address : Baeksan Bldg 3rd Fl Yoksam-Dong, Gangnam-Gu, Seoul, Korea
Phone : +822-564-5933
Fax.
: +822-6008-5184
M.P. : +822-10-9767-5184
E-mail : [email protected]
Homepage : www.honey-cell.com
Abstract
• To Minimize Settlement and To Maximize of Soil bearing capacity
• To Minimize Ground Stress Influence Depth
▷ Ground Improvement Method
to Induce Artificially Arching Phenomena Using
HONEYCELL
Honeycell is the concrete block with the calculated opening
Arching
•
The phenomena to sustain the safe arch shape as the particles transfer
the forces each other
•
The soil particles construct the safest arch by themselves without any
under supports
Arching Applications in Civil Engineering
• The arching on the ground is to transfer earth pressure from unstable
soil into stable soil.
Arching
activity
Arching
failure
[ Arching on the embankment above [Arching at adjacent foundation]
pile installed at soft ground ]
[Arching at passive pile]
Conceptual Drawing
Honeycell
A TYPE(5 Cells)
• The device to induce the arching on the
ground as to install it under the structure
〔 Plan 〕
B TYPE(3 Cells)
Refill
Footing
Lean Concrete
Honeycell
Replacement
(Optional)
Construction Process
[Honeycell]
3.Compaction
1.Site
4.Honeycell Installation
2.Crushed stone replacement
5.Filling Opening with crushed stone
Capability
Soil Bearing Capacity Improvement
 Lab Test
• At Same Soil Condition : Applied Honeycell / General = Min. 1.4
• In case of replacement by crushed stone under honeycell
 In-situ Test
with 50cm thick : Up to 900 kPa
Arching and Influence Depth
 Numerical
Simulation
• To Confirm Arching Development
• Influence depth : 4 times of cell width (Max.1 M )
Numerical Analysis
[General]
[Honeycell]
[General]
[Honeycell]
Unforced
Particles
Arching
Development
Reduced
Influence depth
Lab Test
• At Same Soil Condition
: Applied Honeycell / General =Min. 1.4
[Scale:1/4]
[Load-Settlement Graph]
Honeycell
0
 General
 Honeycell
Settlement (mm)
5
10
445
772
15
20
25
General
0
200
400
600
Load (kPa)
800
1000
In –situ Test (Bearing Capacity)
Plate Load Test
Soil
Test Type
Improving
ratio
0
5
1
O.G
General
25
1.0
2
O.G
Honeycell
35
1.4
3
Re
General
30
1.2
4
Re
Honeycell
45
1.8
• Replacement Depth : 12cm  Twice of Cell width
• Plate size : 30 cm
• O.G : Original Ground , Re : Replacement
0
Settlement (mm)
No.
Load (t/m2)
Allowable
(ton/m2)
40
80
120
160
10
15
20
25
30
1
35
3
2
4
In-situ Test ( Influence depth)
Increasing Ratio Graph of ground stress under foundation
[General]
160
[Honeycell]
General
140
Honeycell
Dr = 60%
100
80
aD2
Stree increasing ratio (%)
120
60
40
20
0
0
50
100
Load
(t/m2)
150
200
Applicable Area
Cone Roof Tank
[Type 1. Soil Reinforcement of Structure Foundation]
[Type 2. Subbase Course of Pavement]
Preloading
SandMat
[Type 3. For Pipe and Box Culvert]
Preloading
Height
Reduction
Soft Clay
permeable layer
[Type 4. Underneath of Preloading]
Case Study
Name
Location
B.C
Settlement
Korea Equity Management Company
Cheongjoo City
12 t/m2
Req. B.C
17.82 mm < 25mm … O.K
20 t/m2
Case Study
Name
Seowon Univ.
Location
Cheongjoo City
B.C
Settlement
18 t/m2
Req. B.C
16.88 mm < 25mm … O.K
45 t/m2
Case Study
Name
Location
B.C
Settlement
Seokyo Dong Building
Seokyo Dong, Seoul
5 t/m2
Req, B.C
6.75 mm < 25mm … O.K
15 t/m2
Case Study
Name
Location
B.C
Settlement
Seokyo Dong Building
Seokyo Dong, Seoul
8 t/m2
Req, B.C
3.36 mm < 25mm … O.K
15 t/m2
Case Study
Name
Location
B.C
Settlement
L-1 Project
Suwon-si, Gyeonggi-do
3 t/m2
Req, B.C
10.66 mm < 25mm … O.K
15~20 t/m2