鼠道法是日本一些地区田间排水的主要方法之一。施工时,鼠道犁要挖至30～40cm深的耕层,需用29.4～36.8kw的拖拉机牵引,因此影响这一技术的推广。但随着一种能上下,前后振动钻进的新型鼠道犁的问世,使牵引力减少到14.7～22.1kw,大大降低了施工难度,因而这种方法成为一种最常用的暗管施工技术。 但是,鼠道洞壁易坍塌造成洞孔堵塞,影响使用,寿命短,为此,又相继开发出在洞 Rat is one of the main methods of field drainage in some parts of Japan. During construction, the plow of the rat plow digs to the plow of 30-40cm deep and needs to be trailed by 29.4-36.8kw, thus affecting the popularization of this technology. However, with the advent of a new type of rat plow that can vibrate up and down, front and back, the tractive force is reduced to 14.7-22.1 kW, which greatly reduces the difficulty of construction. Therefore, this method becomes one of the most commonly used underground pipe construction techniques. However, the rat cave walls collapsed easily cause holes blocked, affecting the use of short life expectancy, and have also developed in the hole