Back mat laying worker - Back mat laying worker

...Flood control methods have been developed from these life-risking experiences, and the main methods are as follows: (1) Methods for overflow: stacking several layers of bales of sand on the top of the levee (Figure a), damming, driving piles into the top of the levee and applying damming, and laying straw mats on the back slope of the levee to prevent scouring of the back slope of the levee due to overflow (Figure b). (2) Methods for scouring: attaching weighted bales of sand to trees and applying them to the scouring area (Figure c), framing to put cows in the scouring area, standing gabion work to cover the scouring area with gabions (cylindrical baskets woven with a tortoiseshell pattern and filled with stones) (Figure d), rubble work to throw large stones or bales of stones into the scouring area, and building work to pile up bales of sand on the back slope to compensate for the reduction in the levee cross section due to scouring (Figure e).

*Some of the terminology used in relation to "back mat laying workers" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…水防工法は，こうした命をかけた経験から生み出されてきたもので，おもなものに次のようなものがある。(1)越流に対する工法　堤防天端に土俵を何段か積み重ねる積み土俵工(図a)，堤防天端に杭を打ちせき板をあてるせき板工，越流による堤防裏法面の洗掘を防止するため裏法面にむしろを張る裏むしろ張り工(図b)など。(2)洗掘に対する工法　樹木におもり土俵をつけて洗掘個所にあてがう木流し工(図c)，洗掘個所に牛類を入れる枠入れ工，洗掘個所を蛇籠(亀甲形の目に編んだ円筒状の籠に石を詰めたもの)で被覆する立て蛇籠工(図d)，洗掘個所に大きな石または石俵などを投入する捨石工法，洗掘による堤防断面の減少を補うため，その裏法面に土俵を積む築回し工(図e)など。…

※「裏むしろ張り工」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報