Bosai Solution ID : JBP00123

Implant™ Waterproof Wall
Protecting important facilities from inundation caused by a flood and a storm
surgeHazard
Tsunami Cyclone Storm Surge Flood

Solution Purpose
Prevention & Mitigation

Solution Theme
Disaster Prevention Plan Building Technology

Technology Subject
Mitigation Plan Business Continuity Plan Facility for Disaster Prevention Resilience Improvement onExisting Building＜ Downloaded from www.bosai-jp.org ＞

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Advantages
Recently torrential rainfall has occurred more frequently in various countries in the world, causing
severe floods and sediment-related disasters. The overflow of rivers has caused flooding damage inpublic facilities, factories, and residences. In addition, not only humans and the economy are damaged
but disruptions such as power outages and water shortages have also significantly impacted criticallifelines.
Business continuity is a social responsibility for companies that support socio-economic development.
Additionally, companies are required to ensure preparedness against disasters through BCP (BusinessContinuity Plan) to fulfill their duty.
Implant™ Waterproof Wall serves as a defense measure against water disasters. It can be rapidly
constructed by installing structural members (such as steel sheet piles) into the ground, effectively
preventing facilities from being submerged in water.

Solution Illustrated

The Implant Waterproof Wall is a self-supporting structure that embeds steel sheet piles into the ground.
These steel sheet piles, which have also been employed as retaining walls for roads and river revetments,
boast a successful track record in sealing levees to prevent water leakage. Moreover, the wall’s
protruding section prevents overtopping during floods, while the embedded portion safeguards against
underground infiltration, mitigating the occurrence of boiling and piping phenomena.

Background＜ Downloaded from www.bosai-jp.org ＞

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Flooding situation at Rojana Industrial Park in Thailand
Sourse:”Ministry of Land, Infrastructure, Transport and Tourism (MLIT) website”https://www.mlit.go.jp/river/bousai/main/saigai/kisotishiki/index3.html

In response to severe flood damage caused by torrential rains that have been increasing in recent years,
the demand for flood prevention measures is increasing nationwide at the urging of the government.
Under such circumstances, the actual results of Implant Waterproof Walls using steel sheet piles as oneof the impervious walls are increasing.

Exposition of the Solution[press-in method]

The press-in method is one of the methods for installing prefabricated piles into the ground to apredetermined depth. In the press-in method, the next pile presses into the ground by the hydraulicstatic load by grabbing installed piles using the extraction resistance force of reaction piles as a reaction
force.
Compared to other installation methods, the press-in method has the advantage of generating lessvibration and noise in the surrounding environment, not disturbing the ground, and not generating
sludge.
Furthermore, since the reaction force is obtained from the completed pile, the weight of the press-in
machine itself is not required, and the construction machine can be made lightweight and compact.
Therefore, it can be applied to various conditions of job sites such as narrow spaces.
[GRB System™]＜ Downloaded from www.bosai-jp.org ＞

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GRB System™ is an innovative installation of the press-in principle, which obtains reaction force fromcompleted piles. Operating all machinery and equipment on completed piles eliminates the need forany temporary work and allows all processes of press-in construction, such as pile transportation,installation, and pressing in to be completed only on the piles.
[Surfacing Material] ※Concrete products, siding walls, etc.

GRB System enables rapid systematization to install surfacing material from the driven sheet pile wall.
Even in narrow areas around factories or in conditions close to existing structures, it has become
possible to supply materials and loading and unloading operations on the pile.

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Achievements of Examples

Kochi 3rd Factory and RED HILL 1967 (Akaoka Town, Kanan City)
Assuming the seismic intensity and tsunami flooding of the Nankai Trough Earthquake
・Maximum seismic intensity: 6 to 7・Max. inundation depth: 3.0～5.0m
・Time to reach 30cm depth: 40-60 minutes
We are preparing for the early resumption of operations by building an Implant Waterproof Wall inresponse to anticipated damage (as described above).

Corporate Profile
GIKEN SEKO CO., LTD.
75-1

Minato Urayasu-shi Chiba 279-0024 Japan Tel. : +81-47-318-9111
 E-mail : murashima@giken.com
 Website : https://www.gikenseko.co.jp/for-english/＜ Downloaded from www.bosai-jp.org ＞

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