| 摘要 |
PROBLEM TO BE SOLVED: To carry out gravel pitching (gingko application, scale application) which has not been conventionally and generally used because of no experienced workers, high cost, fear of differential settlement, etc., even though its beauty and environmental adaptability are recognized. SOLUTION: A principle of a way of making of each of curve groups and its rule concerning the magatame application and spiral application as pin roller arrangement endurable for appreciation and rich in changes are shown. An example of the magatama application by this rule is sown in a drawing 1. It is possible for anyone to easily pitch gravels by using the proposed rule at a working site. Additionally, a netting engineering method is shown in countermeasures for differential settlement of the pin rollers.
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