Search for PARI Report/Technical Note
Model test for effect of installation process and shape of piles on pullout resistance of open-ended piles
Port and Airport Research Institute 1364
November, 2019
Foundations Group
Keita Nakamura・Yusuke Motomizu・Satoshi Matsumura・Takaaki Mizutani・Satoshi Shingai・Eiji Oshita・Naoaki Suemasa
For open-ended pile foundations of port and harbor facilities, the design depending on the pullout resistance of piles does not t...
Axial Resistance of Steel Pipe Piles Installed and Cemented to Bedrock by Piling Rig with Twin Coaxial Rotary Head
Port and Airport Research Institute 1363
November, 2019
Foundations Group
Takaaki MIZUTANI・Masaaki KOJIMA・Kazuyuki MURAKAMI・Hirofumi MIGITA・Haruhiro MARUYAMA・Hiroyuki HASHIMOTO・Takefumi ISHIDA
When constructing a pile foundation under the condition that a thin soft layer is present on the support layer, the shaft resista...
Long-term exposure test of concrete using surface coating materials and epoxy resin-coated rebar in Naha Port road bridge
Port and Airport Research Institute 1362
November, 2019
Materials Group
Toru YAMAJI・Nubuyuki KINJOH・Jun TOMIYAMA
In this study, in order to investigate the prevention effect for chloride attack of concrete by surface coating material and epox...
Diversity indices in marine invertebrates:Comparison of two types of sampling eff orts
Port and Airport Research Institute 1361
November, 2019
Maritime Environmental Information Group
Shinya HOSOKAWA・Kyosuke MOMOTA
The indices that are used to assess species diversity are sensitive to sampling eff ort, meaning that engineers have to standardiz...
Examination of accuracy of photogrammetry of coastal area by UAV
Port and Airport Research Institute 1360
November, 2019
Shingo KAWAGUCHI・Kojiro SUZUKI・Naoki TSURUTA・Shota ASAHI
Unmanned aerial vehicles based on rotary wings (multi-rotor), namely the so-called UAV have been widely spread in recent years. T...
Proposal of Pile Connection Method with Precast Superstructure for Port Pier
Port and Airport Research Institute 1359
August, 2019
Structural Mechanics Group
Yuichiro KAWABATA,Katsuya IKENO,Ema KATO,Mitsuyasu IWANAMI
Recently, construction method for precast superstructures of port piers is required to minimize offshore operation after pipe driv...
Validation of third generation wave models in terms of ocean swells
Port and Airport Research Institute 1358
August, 2019
Hitoshi TAMURA,Koji KAWAGUCHI,Takashi FUJIKI,Fumikazu SUEHIRO
Wave information is of primary importance for design of maritime structures and for the project implementation. NOWPHAS, a wave ob...
Annual Report on Nationwide Ocean Wave Information Network for Ports and Harbours (NOWPHAS 2017)
Port and Airport Research Institute 1357
August, 2019
Koji KAWAGUCHI,Fumikazu SUEHIRO,Takashi FUJIKI,Hitoshi TAMURA
Since 1970, the Ports and Harbours Bureau, Ministry of Land, Infrastructure, Transport and Tourism and its asso-ciated organizatio...
Annual Report on Strong-Motion Earthquake Records in Japanese Ports (2017)
Port and Airport Research Institute 1356
August, 2019
Engineering Seismology Group
Yosuke NAGASAKA,Atsushi NOZU
Since 1962, strong ground motions and earthquake responses of structures have been observed in the major ports in Japan. In 2017, ...
Physical Environment Concerning Hard Clam’s(Merterix lamarckii) Survival at Kashima-nada Open Sea
Port and Airport Research Institute 1355
August, 2019
Coastal and Estuarine Sediment Dynamics Group
Shin-ichi YANAGISHIMA,Satoshi NAKAMURA,Masayuki BANNO,Yukio YAMAZAKI,Hiromi HANZAWA,Toru UDAGAWA,Koichi SUGIMATSU,Ryogen NAMBU,Hideki SAWADA,Satoshi TAKEWAKA
Hard clam(Meretrix lamarckii) is one of the environmentally and economically valuable species at the Kashima-nada coast, which fac...
Development of a New Compaction Grouting Method with Improved Upheaval Control and Efficacy of Liquefaction Countermeasures
Port and Airport Research Institute
August, 2019
Soil Dynamics Group
Shinji SASSA,Hiroyuki YAMAZAKI,Takeshi KONISHI,Masaki ADACHI,Takashi SHINSAKA,Kanji TAKENOUCHI,Hiroki MOROHASHI,Hidenori SAITO,Hiroshi OKADA,Keita TAKADA,Shingo WATANABE,Chikai KANEKO,Tadashi TAKAHASHI
The Compaction grouting (CPG) method is one of the liquefaction countermeasures to increase the density of improved ground by inje...
Development of Hydro-Geotechnical Centrifuge PARI Mark II-R
Port and Airport Research Institute 1353
August, 2019
Soil Stabilization Group
Hidenori TAKAHASHI,Naruhiko FUJII,Yoshiyuki MORIKAWA,Daiki TAKANO
A centrifuge machine increases stress and water pressure in a model ground with a centrifugal acceleration and produces the same b...
INVESTIGATION ON REINFORCEMENT OF A PIER WITH STEEL PIPE PILES USING SUPPLEMENTAL DAMPING DEVICES
Port and Airport Research Institute 1352
March, 2019
Earthquake and Structural Dynamics Group
Eiji KOHAMA,Shingo AWAZU,Yousuke OHYA,Yoshio SHUOZAKI
Energy-related facilities in waterfront area are required to have seismic performance to continue energy supply after large-scale ...
A field-experimental study on solidification of filling material in caisson toward enhanced resistance of caisson against repeated collision of concrete block
Port and Airport Research Institute 1351
March, 2019
Structural Mechanics Group
Yuichiro KAWABATA,Kenichi KUROKI,Ema KATO,Yoshiyuki MORIKAWA,Tetsushi HAYAKAWA
In breakwaters covered with wave-dissipating blocks, outer RC walls of the caisson may show local failure due to the repeated coll...