A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a manhole removal method that may be implemented readily, eliminates maintenance and lining on a concrete portion of an existing manhole, and prolong a service life of sewage piping.SOLUTION: In a manhole removal method, a cylindrical casing is disposed to surround an existing manhole 100. The existing manhole is cut in a horizontal direction at a position above a lower edge part of the cylindrical casing. An upper portion of the cut and separated existing manhole is removed from the cylindrical casing. A synthetic resin pit body 20 having a horizontal pipe part 21 and a vertical pipe part 22 is disposed on a partially removed invert 111. Concrete C is cast around the pit body 20, after inserting opening ends 21a, 21b of the horizontal pipe part 21 respectively into existing sewer pipes 114, 115. Then, a synthetic resin pipe body 30 is connected in an erected state to the vertical pipe part 22 of the pit body 20, and sediment is refilled around the pipe body 30. Furthermore, the cylindrical casing is removed, and a cover body 40 is installed on a top end opening part 30a of the pipe body 30.SELECTED DRAWING: Figure 8
【課題】施工が容易であり、既設マンホールのコンクリート部分のメンテナンスやライニングが不要となり、下水道配管の長寿命化を図ることができるマンホール撤去工法を提供する。【解決手段】既設マンホール１００の周りを囲むように筒状ケーシングを配置し、筒状ケーシングの下縁部よりも上方位置において既設マンホールを水平方向に切断し、切断分離された既設マンホールの上方部分を筒状ケーシング内から撤去し、横管部２１と縦管部２２と有する合成樹脂製の枡体２０を一部除去されたインバート１１１上に配置し、横管部２１の開口端２１ａ，２１ｂをそれぞれ既設下水管１１４，１１５内に挿入した後、枡体２０の周りにコンクリートＣを打設し、次に、枡体２０の縦管部２２に合成樹脂製の管体３０を直立状に連結し、管体３０の周りを土砂で埋め戻した後、筒状ケーシングを撤去し、管体３０の上端開口部３０ａに蓋体４０を設置するマンホール撤去工法である。【選択図】図８
PROBLEM TO BE SOLVED: To provide a manhole removal method that may be implemented readily, eliminates maintenance and lining on a concrete portion of an existing manhole, and prolong a service life of sewage piping.SOLUTION: In a manhole removal method, a cylindrical casing is disposed to surround an existing manhole 100. The existing manhole is cut in a horizontal direction at a position above a lower edge part of the cylindrical casing. An upper portion of the cut and separated existing manhole is removed from the cylindrical casing. A synthetic resin pit body 20 having a horizontal pipe part 21 and a vertical pipe part 22 is disposed on a partially removed invert 111. Concrete C is cast around the pit body 20, after inserting opening ends 21a, 21b of the horizontal pipe part 21 respectively into existing sewer pipes 114, 115. Then, a synthetic resin pipe body 30 is connected in an erected state to the vertical pipe part 22 of the pit body 20, and sediment is refilled around the pipe body 30. Furthermore, the cylindrical casing is removed, and a cover body 40 is installed on a top end opening part 30a of the pipe body 30.SELECTED DRAWING: Figure 8
【課題】施工が容易であり、既設マンホールのコンクリート部分のメンテナンスやライニングが不要となり、下水道配管の長寿命化を図ることができるマンホール撤去工法を提供する。【解決手段】既設マンホール１００の周りを囲むように筒状ケーシングを配置し、筒状ケーシングの下縁部よりも上方位置において既設マンホールを水平方向に切断し、切断分離された既設マンホールの上方部分を筒状ケーシング内から撤去し、横管部２１と縦管部２２と有する合成樹脂製の枡体２０を一部除去されたインバート１１１上に配置し、横管部２１の開口端２１ａ，２１ｂをそれぞれ既設下水管１１４，１１５内に挿入した後、枡体２０の周りにコンクリートＣを打設し、次に、枡体２０の縦管部２２に合成樹脂製の管体３０を直立状に連結し、管体３０の周りを土砂で埋め戻した後、筒状ケーシングを撤去し、管体３０の上端開口部３０ａに蓋体４０を設置するマンホール撤去工法である。【選択図】図８
MANHOLE REMOVAL METHOD
マンホール撤去工法
KAKIZOE KONOSUKE (author)
2017-10-26
Patent
Electronic Resource
Japanese
RAISING MEMBER OF MANHOLE, RAISING METHOD OF MANHOLE AND MANHOLE
| European Patent Office | 2018