INSTALLATION METHOD OF FREE GRADIENT SIDE DITCH

• Main Authors: SASAKI TAKASHI, MASUDA HIROTOSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.03.2019
• Subjects: CESSPOOLS; FIXED CONSTRUCTIONS; SEWERAGE; SEWERS; WATER SUPPLY

To provide an installation method of a free gradient side ditch allowing reduction of installation period and installation cost of the side ditch, and allowing safe and reliable height adjustment work of the side ditch.SOLUTION: An installation method of a free gradient side ditch includes: a foundation ballast surface installation step; a concrete product installation step of installing a free gradient side ditch 1 by adjusting the construction reference face height of the free gradient side ditch 1 having a portal shape in the front view by a height adjusting member 6 and forming a predetermined space 10 between a foundation ballast surface 5 and a lower end of the free gradient side ditch 1; and a concrete placing step of pouring ready-mixed concrete into the space. In the concrete placing step, a foundation concrete part 8a integrally formed on the foundation ballast surface in the space and an invert concrete part 8b integrally formed on the foundation concrete part and forming a waterway bottom 11a with a predetermined gradient are placed at the same time.SELECTED DRAWING: Figure 1 【課題】側溝敷設期間の短縮化及び敷設費用の低廉化を図るとともに、安全かつ確実な側溝の高さ調整作業が行い得る自由勾配側溝の敷設工法を提供する。【解決手段】基礎砕石面敷設工程と、高さ調整部材６により正面視で門型の自由勾配側溝１の施工基準面高さを調整し、基礎砕石面５と自由勾配側溝の下端との間に所定の空間１０を形成して自由勾配側溝を据付けるコンクリート製品据付工程と、前記空間に生コンクリートを流し込むコンクリート打設工程と、を含み、コンクリート打設工程は、空間にて基礎砕石面上に一体成形される基礎コンクリート部８ａと、基礎コンクリート部上に一体成形されて所定勾配の水路底面１１ａを成形するインバートコンクリート部８ｂと、を同時に打設する。【選択図】図１