International Press-in Association
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Map of Research and Development

Emeritus Prof. Tagaya prepared the Map of Research and Development for Press-in Construction when the IPA invited research proposals on 6 Nov 2006 for the 1st IPA Research Grant Award. The document in PDF can be downloaded from downloads menu. The map gives us an idea of possible research themes of the press-in engineering. The latest map is shown below.

1. Basic Research

  • Updated: 14 Apr 2008
  1. 1-1. Bearing capacity of press-in pile
    1. 1-1-1. Sheet pile and circular pile
      (open end and closed end piles)
    2. 1-1-2. Vertical and horizontal bearing capacities
    3. 1-1-3. Vertical and batter piles
    4. 1-1-4. Soil type (clay, silt and gravel)
    5. 1-1-5. Relation between CPT and bearing capacity
    6. 1-1-6. Soil plug
    7. 1-1-7. Effect of friction cutter
  2. 1-2. Point resistance and skin friction
    during press-in and during extraction
    1. 1-2-1. Clay and silt (disturbance and thixotropy)
    2. 1-2-2. Sand and silt (pore water pressure and creep)
    3. 1-2-3. Gravel (bearing mechanism)
    4. 1-2-4. Soil plug of open end pile
    5. 1-2-5. Speed of press-in
    6. 1-2-6. Effect of friction cutter
  3. 1-3. Elasto-plastic behavior between force and displacement
    1. 1-3-1. Axial, lateral and torsional forces
    2. 1-3-2. Vertical and batter piles
    3. 1-3-3. Soil type (clay, silt and gravel)
  4. 1-4. Prediction of bearing capacity based
    on press-in behavior
    1. 1-4-1. Sheet pile and circular pile
      (open end and closed end piles)
    2. 1-4-2. Vertical and horizontal bearing capacities
    3. 1-4-3. Vertical and batter piles
    4. 1-4-4. Soil type (clay, silt and gravel)
    5. 1-4-5. Relation between CPT and bearing capacity
    6. 1-4-6. Soil plug
    7. 1-4-7. Effect of friction cutter
  1. 1-5. Pile-pile friction during press-in and extraction
  2. 1-6. Bearing capacity of pile installed by gyropress machine
    1. 1-6-1. Skin friction in sand, gravel and rock
    2. 1-6-2. End bearing in sand, gravel and rock
  3. 1-7. Bearing capacity of pile press-in
    with auxiliary water jetting
    1. 1-7-1. End bearing and skin friction
    2. 1-7-2. Sand and gravel
    3. 1-7-3. Press-in and extraction resistances
  4. 1-8. Bearing capacity of chemical grouted pile
    1. 1-8-1. Clay, silt, sand and gravel
    2. 1-8-2. End bearing, press-in and extraction resistances
    3. 1-8-3. Material to be used and its mix proportion
  5. 1-9. Bearing capacity and control of machine
    in press-in method with augering
    1. 1-9-1. Sand, gravel and rock
    2. 1-9-2. Press-in force, torque, shape of auger head
    3. 1-9-3. Excavation of soil plug
  6. 1-10. Development of monitoring system on ground
    information during pile press-in
  7. 1-11. Development of method for guarantee of pile quality
    and quality management of pile based on ground
    information during press-in
  8. 1-12. Environmental impact assessment
    of press-in construction

2. Application

  1. 2-1. New concept of geotechnical structure
    1. 2-1-1. Implant structure
    2. 2-1-2. Anti-liquefaction structure and aseismic structure
    3. 2-1-3. Inclined revetment
    4. 2-1-4. Composite structure
  1. 2-2. Improvement and reinforcement
    of construction by press-in method
  2. 2-3. Quick recovery construction method
    to hazard due to heavy rain and strong ground motion
  3. 2-4. Improvement of construction method
    (prevention of ground deformation, etc.)

3. Others (machine, operation, etc.)

  1. 3-1. Improvement of machine and lightening of machine
  2. 3-2. Automatic operation system on press-in machine
  3. 3-3. Improvement of operation manual for press-in machine
  1. 3-4. Accuracy of press-in pile installation
    (control of position and inclination)
  2. 3-5. Quality control of press-in piles
  3. 3-6. Extension of use of press-in piling to other fields

4. Remarks

  1. 4-1. Basic research on press-in and on extraction mechanisms
  2. 4-2. Improvement of additional value
  3. 4-3. Extension of us