Deep Depth Tip Position
Measurement System

Advanced visualization
technologyfordeepmixingmethod
低炭素コンクリートとはOverview of Technology
Targeting the Deep Cement Stabilization method (DCS method), this system provides real-time andprecise tracking of the rod tip positions in the ground. It measures the inclination of each rod using abiaxial inclinometer attached to the casing rod, combined with the rod length. The rod joint adopts
wireless communication, simplifying the process during rod addition. By applying "multi-hopcommunication technology" with data relay functions in the measuring devices on each rod,enabling the acquisition of underground rod inclination data at the surface.
Concave

Eccentricity
DGL

Inclinometer

Antenna(Wireless)Joint
section

10m10mBattery

Upper rod(Concave)

MixingtoolSensor box

Construction machine
mounted with the system

Inclination
angle θCommunication
cable (Wired)
Cross-section of rod joint
LegendBiaxial inclinometer, communication
infrastructure and battery
Communication cable
Antenna
Wireless communication (920MHz band)RodlengthL

Overview of the system

AntennaConvexAntenna

Antennainstallation

Effect of Technology
The system was applied to a seismic reinforcement ground improvement project. With a maximum
depth of 43.7 meters, the construction required consideration for an existing waterway tunnel at thebottom of soil-cement columns. By integrating our developed construction information
visualization system "3D Pile Viewer" with this system, we directly monitored the tip position of
the soil-cement columns in real-time, ensuring
construction
without
impactingexistingstructures.
適用事例
Hazama AndoMax. Depth
43.7m

Coloring represent current
values (The redder thecolor, the higher theground resistance)
Soil-Cement Columns(Dia.1.6m)

1.0m
Min.1.4m

3D Visualization by 3D Pile Viewer(When construction near existing waterway tunnel)

Min.1.4m

Measurement results surrounding
existing waterway tunnel

Multi-directional Slurry Oscillation
Stirring Method “WILL-m method”
New jetting mechanism boosts construction efficiency by 20%
Overview of Technology
The WILL method is classified as a mid-depth mixing technique among soil-cement mixing methods.
It creates improved structures by mixing cement slurry and the original ground using a special mixing
tool. The "WILL-m method" was developed by adding a new jetting mechanism to the conventional
WILL method. This mechanism ejects cement slurry at high pressure from a newly installed upper
outlet, significantly improving the mixing performance.
Comparison “WILL method” and “WILL-m method”
WILLmethod
WILL-mmethod

OutletPressure

Slurry Supply Amount（L/min）

Lower

1MPa

240

UpperLower

Over 10MPa
1MPa

400

Newly installed upper outlet(high pressure)

Newly installedupper outlet

Conventional lower outlet

Construction
machineof（lowpressure）
安藤ハザマが保有する低炭素コンクリートメニュー
WILL-m method
Stirring blades of WILL-m method

Effect of Technology
The WILL-m method was applied to construct a soil-improved earth
retaining structure in agricultural pump station construction.
Compared to the conventional WILL method, the mixing time wasreduced by approximately 18%, and it was confirmed that the newly
developed method achieves a quality equivalent to or higher than theconventional type.

30m
4m

34m
4m

Soil-improved earth retaining(Design strength:0.28MPa)(a)Overview picture

Achievement of mixing time
（WILL-m method and WILL method）

Distribution of UC Strength（WILL-m method）(b)Cross-section

Geotechnical Centrifuge
Highly precise simulation of the real object's behaviorwithasmall-scalemodel
低炭素コンクリートとはWhat is a Geotechnical Centrifuge?
A geotechnical centrifuge is a tool used in model experiments to understand the behavior of theground, soil-structures, and underground structures. A small-scale model is mounted on a swing
platform at the end of an arm that extends from the rotating axis. By rotating the device at high speed,
the swing platform is swung up by centrifugal force, which can apply a large gravitational
acceleration to the small-scale model. By adjusting the gravitational acceleration according to thescale of the model, it is possible to simulate behavior equivalent to the actual scale.

Small model（Riverbank）
Overview of Geotechnical Centrifuge

Geotechnical Centrifuge of Hazama Ando Corporation
Hazama Ando Corp.'s Geotechnical centrifuge can apply a maximum centrifugal acceleration of 100G,
enabling highly precise simulation of the behavior of real structures 100 times the size of the model. A
shaking table is mounted on the swing platform, facilitating vibration experiments such as earthquake
simulations. Utilizing this device allows for efficient and accurate design, construction, anddevelopment of new technologies for structures related to the ground in the civil engineering andarchitecture fields.

Geotechnical centrifuge
Geotechnical centrifuge specification
Items

Geotechnical centrifuge Lab.

Specification

Effective rotation radius
3.5m
Maximum centrifugal acceleration
100G
Maximum loading weight
200G/t
L1.2m×W1.2m×H1.0m
Loading space
Adjustable centrifugal
25～100G
acceleration
Shaking
L1.1m×W0.5m
Sizetable
Maximum acceleration
50G
Maximum loading weight
370kg

Prepared for complex disasters of heavy
rain and earthquakes.
“Embankment Enhancement Technology”
New embankment reinforcement method by impermeable
and permeable ground improvement
Background of Technology
In recent years, natural disasters like heavy rain and earthquakes have increased in frequency and scale,leading to escalated damage to embankments and reservoirs. Against this background, there's a growing
need for rational measures to address these complex disasters.

Earthquake Damage to Reservoir（Domae Pond, Fukushima Pref.）Source: Characteristics of Reservoirs damage in Fukushima Prefecture andEmergency Measures due to the 2011 Tohoku Earthquake, Agriculture,Forestry and Fisheries Research CouncilEarthquake Damage to Riverbank（Naka river, Ibaraki Pref.）Source: Status of Emergency Restoration Works on Directly Controlled Rivers(River Disaster Sites due to the 2011 Tohoku Earthquake), River Department ofKanto Regional Development Bureau, MLIT

Overview of Technology
Hazama Ando Corp. proposes a new embankment reinforcement method combining impermeable andpermeable ground improvements to address complex disasters from heavy rain and earthquakes.
■Permeable improvement body：Possessing high shear strength and permeability
During heavy rain: Efficiently drains the infiltrated water within the embankment
Prevent erosion of the embankment toe caused by overtopping and piping
During earthquake: Restrain deformation of the ground and embankment caused by liquefaction■Impermeable improvement body：Construct by in-situ mixing method
During heavy rain: Prevent river water infiltration into the embankment and erosion of the toe
During earthquake: Restrain deformation of the ground and embankment caused by liquefaction

Imaging of new reinforcement method

Permeable improvement body-3
Hydraulic conductivity k=1.0×10 m/sec