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DP Foundation Construction Method
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The existing concrete foundation method typically required road construction to bring in heavy machine to widely excavate the ground and a truck mixer to build the basic block. However, the DP foundation method method does not utilize any heavy machine nor excavates the ground and is workable even in weak ground (N conversion values of 0.5~2.0) where the existing method was impossible to construct.
DP Foundation Construction Method Features
Light weight to be transportable with manpower (17 kg in total and upper and lower parts are separable)
Need no heavy machine and constructible only with electric tools
No need for ground excavation and refill
Simple construction to shorten construction period
Very low impact on natural environment
DP Foundation Construction Method Overview
Easy way of construction even in weak ground while preserving natural environment
The foundation construction method is to install 4 pins in the ground to gain the bearing power to support a structure, targeting small-scale structures such as wooden road and observatory.
DP Foundation Construction Method Components
Cast-iron (ductile) GCD450 or over
※ Subject to change according to load
Pipe for zinc galvanizing
Rubber
DP Foundation Construction Method Application Conditions
Natural Condition
For cohesive soil, N conversion value of 1 or higher; for sandy soil, N conversion value of 3 or over
Field Condition
Field Condition
As DP method provides large supporting power, small horizontal strength and little directional nature,
it is suitable for structures with high pillar
Others
The upper limit of N value could be about 50KN (∮ 6.5 m/m), if only the type Pin size is adjusted.
DP Foundation Construction Method Application
Wetlands where installation is generally difficult with the traditional method
Steep hills where installation is generally difficult with the foundation method
Places with deep frozen ground
Inhabitants of precious animals and plants
Places where heavy machines cannot enter
Places where natural environment has to be preserved
Places having non-removable stagnant water
Farmland
Lake
Slope
Weak Ground
Patented Method (deck foundation) Comparison
| Classification | DP Foundation | Company A’s Product | Concrete Foundation |
|---|---|---|---|
| Concept Map |  |
 |
 |
| Excavation | Not necessary | Not necessary | Heavy machine / manual excavation |
| Transportation | Small group of people to transport | Small group of people to transport | Heavy material transportation |
| Construction Period | Short period | Short period | Long period |
| Stop gate | Not necessary | Not necessary | Stop gate construction first before main installation |
| Cost | Low cost | High cost | High cost for weak ground |
Construction Method
Plate Bearing Test
| Criteria | Yield/ ultimate load (KN/㎡) |
Analysis result | Safety rate (F.S) |
Allowed supportive force (KN/㎡) |
Remarks | ||
|---|---|---|---|---|---|---|---|
| Previous subsidence | 10D% | 30mm | 99.1(↑) | 99.1(↑) | 3.0 | 99.1(↑) | ↑ or over |
| Standard value | 30mm | 99.1(↑) | |||||
| Yield load | P-S | 99.1(↑) | |||||
| logP-logS | 99.1(↑) | ||||||
| S-logt | 99.1(↑) | ||||||
| Ground reaction coefficient | 1.746 kg/㎤ | ||||||
| Ground deformation coefficient | 37.656 kg/㎤ | ||||||
| Allowed supportive force from beating test results |
33.0 KN/㎤ | ||||||
| Criteria | Yield/ ultimate load (KN/㎡) |
Analysis result | Safety rate (F.S) |
Allowed supportive force (KN/㎡) |
Remarks | ||
|---|---|---|---|---|---|---|---|
| Previous subsidence | 10D% | 30mm | 99.1(↑) | 99.1(↑) | 3.0 | 99.1(↑) | ↑ or over |
| Standard value | 30mm | 99.1(↑) | |||||
| Yield load | P-S | 99.1(↑) | |||||
| logP-logS | 99.1(↑) | ||||||
| S-logt | 99.1(↑) | ||||||
| Ground reaction coefficient | 0.677 kg/㎤ | ||||||
| Ground deformation coefficient | 14.601 kg/㎤ | ||||||
| Allowed supportive force from beating test results |
33.0 KN/㎤ | ||||||
