Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北海道農材工業株式会社filedCritical北海道農材工業株式会社
Priority to JP9367582UpriorityCriticalpatent/JPS591735U/en
Publication of JPS591735UpublicationCriticalpatent/JPS591735U/en
Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage
(AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【図面の簡単な説明】[Brief explanation of drawings]
図面は本考案の実施例を示し、第１図は正面図、第２図 は第１図１．−Ｉ線端面図である。The drawings show an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a front view. -I line end view.
Claims (1)
【実用新案登録請求の範囲】[Scope of utility model registration request]管壁外周面に、複数本の細溝を、互いに所要の間隔をあ けて管軸方向に左回りの螺旋状と右回りの螺旋状とにし て形成したことを特徴とする暗渠用排水管。A drainage pipe for an underdrain, characterized in that a plurality of narrow grooves are formed on the outer peripheral surface of the pipe wall in a counterclockwise spiral shape and a clockwise spiral shape in the direction of the pipe axis, spaced apart from each other at a required interval.