Soil Improvement Method Using Arching Effect

(Honeycell)

Address : Baeksan Bldg 3rd Fl Yoksam-Dong, Gangnam-Gu, Seoul, KoreaPhone : +822-564-5933Fax. : +822-6008-5184M.P. : +822-10-9767-5184E-mail : aceall@aceall.comHomepage : www.honey-cell.com

• 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

Abstract

• 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

[ Arching on the embankment above

pile installed at soft ground ]

[Arching at adjacent foundation] [Arching at passive pile]

Arching Applications in Civil Engineering

• The arching on the ground is to transfer earth pressure from unstable

soil into stable soil.

Arching

Arching

activity

failure

Honeycell A TYPE(5 Cells)

B TYPE(3 Cells)

Lean Concrete

Honeycell

Replacement(Optional)

Refill

Footing

• The device to induce the arching on the

ground as to install it under the structure

〔 Plan 〕

Conceptual Drawing

1.Site[Honeycell] 2.Crushed stone replacement

3.Compaction 4.Honeycell Installation 5.Filling Opening with crushed stone

Construction Process

Capability

• At Same Soil Condition : Applied Honeycell / General = Min. 1.4

• In case of replacement by crushed stone under honeycell

with 50cm thick : Up to 900 kPa

• To Confirm Arching Development

• Influence depth : 4 times of cell width (Max.1 M )

Soil Bearing Capacity Improvement

Arching and Influence Depth

Lab Test

In-situ Test

Numerical

Simulation

[Honeycell][General][Honeycell][General]

Numerical Analysis

Arching Development

Unforced Particles

Reduced Influence depth

Lab Test

0

5

10

15

20

25

0 200 400 600 800 1000Settle

ment

(mm

)

Load (kPa)

445 772

General

Honeycell

[Load-Settlement Graph]

Honeycell

General

• At Same Soil Condition

: Applied Honeycell / General =Min. 1.4

[Scale:1/4]

In –situ Test (Bearing Capacity)

No. Soil Test TypeAllowable(ton/m2)

Improving ratio

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

0

5

10

15

20

25

30

35

0 40 80 120 160

Settle

ment(m

m)

Load (t/m2)

4231• Replacement Depth : 12cm Twice of Cell width

• Plate size : 30 cm

• O.G : Original Ground , Re : Replacement

Plate Load Test

In-situ Test ( Influence depth)

Increasing Ratio Graph of ground stress under foundation

Dr = 60%

aD

2

[Honeycell][General]

0

20

40

60

80

100

120

140

160

0 50 100 150 200

Stree

incre

asin

g ratio (

%)

Load (t/m2)

General

Honeycell

Applicable Area

[Type 1. Soil Reinforcement of Structure Foundation]

Cone Roof Tank

[Type 2. Subbase Course of Pavement] [Type 3. For Pipe and Box Culvert]

[Type 4. Underneath of Preloading]

Preloading

SandMat

Soft Clay

permeable layer

Preloading Height Reduction

Case Study

Name Korea Equity Management Company

Location Cheongjoo City

B.C 12 t/m2 Req. B.C 20 t/m2

Settlement 17.82 mm < 25mm … O.K

Name Seowon Univ.

Location Cheongjoo City

B.C 18 t/m2 Req. B.C 45 t/m2

Settlement 16.88 mm < 25mm … O.K

Case Study

Name Seokyo Dong Building

Location Seokyo Dong, Seoul

B.C 5 t/m2 Req, B.C 15 t/m2

Settlement 6.75 mm < 25mm … O.K

Case Study

Name Seokyo Dong Building

Location Seokyo Dong, Seoul

B.C 8 t/m2 Req, B.C 15 t/m2

Settlement 3.36 mm < 25mm … O.K

Case Study

Name L-1 Project

Location Suwon-si, Gyeonggi-do

B.C 3 t/m2 Req, B.C 15~20 t/m2

Settlement 10.66 mm < 25mm … O.K

Case Study