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A platform for research: civil engineering, architecture and urbanism
Blocking structure adopting geomembrane horizontal seepage prevention and construction method
The invention discloses a blocking structure adopting geomembrane horizontal seepage prevention and a construction method. A trapezoid cross section groove is formed in a natural ponor, a bar-mat reinforcement sheet is arranged on a bottom platform of the trapezoid cross section groove, and geotechnical cloth or bituminous felt is laid on the bar-mat reinforcement sheet. Blocking concrete is arranged on the geotechnical cloth or bituminous felt, an earth and stone dreg grinding and backfilling layer is arranged on the blocking concrete, a submembrane drainage pipe is arranged at the top of theearth and stone dreg grinding and backfilling layer, and the submembrane drainage pipe extends downwards into the natural ponor. A clay pad layer is arranged above the submembrane drainage pipe, an anti-seepage geomembrane is arranged at the top of the clay pad layer, a clay protection layer is arranged above the anti-seepage geomembrane, and an earth and stone dreg protection layer is arranged above the clay protection layer. According to the blocking structure adopting geomembrane horizontal seepage prevention and the construction method, the downward drainage and exhausting need of the geomembrane can be met, and the stability of the structure of the natural ponor in a reservoir basin can be guaranteed; and meanwhile originally needed drainage and exhausting tunnels are omitted, construction is simplified, the work amount is reduced, and project investment is reduced.
本发明公开了一种土工膜水平防渗的封堵结构及施工方法，是在天然落水洞设有梯形截面槽，在梯形截面槽底部平台上设有钢筋网片，在钢筋网片上铺设土工布或沥青油毛毡，在土工布或沥青油毛毡上设有封堵混凝土，在封堵混凝土上设有土石渣碾压回填层，在土石渣碾压回填层顶部设有膜下排水管，膜下排气管向下延伸至天然落水洞中；在膜下排水管上方设有粘土垫层，在粘土垫层顶部设有防渗土工膜，在防渗土工膜上方设有粘土保护层，在粘土保护层上方设有土石渣保护层。本发明既能满足土工膜下排水、排气的需要，又能保证库盆内天然落水洞结构的稳定，同时取消了原需要的排水、排气隧洞，简化施工，减少工程量，降低工程投资。
Blocking structure adopting geomembrane horizontal seepage prevention and construction method
The invention discloses a blocking structure adopting geomembrane horizontal seepage prevention and a construction method. A trapezoid cross section groove is formed in a natural ponor, a bar-mat reinforcement sheet is arranged on a bottom platform of the trapezoid cross section groove, and geotechnical cloth or bituminous felt is laid on the bar-mat reinforcement sheet. Blocking concrete is arranged on the geotechnical cloth or bituminous felt, an earth and stone dreg grinding and backfilling layer is arranged on the blocking concrete, a submembrane drainage pipe is arranged at the top of theearth and stone dreg grinding and backfilling layer, and the submembrane drainage pipe extends downwards into the natural ponor. A clay pad layer is arranged above the submembrane drainage pipe, an anti-seepage geomembrane is arranged at the top of the clay pad layer, a clay protection layer is arranged above the anti-seepage geomembrane, and an earth and stone dreg protection layer is arranged above the clay protection layer. According to the blocking structure adopting geomembrane horizontal seepage prevention and the construction method, the downward drainage and exhausting need of the geomembrane can be met, and the stability of the structure of the natural ponor in a reservoir basin can be guaranteed; and meanwhile originally needed drainage and exhausting tunnels are omitted, construction is simplified, the work amount is reduced, and project investment is reduced.
本发明公开了一种土工膜水平防渗的封堵结构及施工方法，是在天然落水洞设有梯形截面槽，在梯形截面槽底部平台上设有钢筋网片，在钢筋网片上铺设土工布或沥青油毛毡，在土工布或沥青油毛毡上设有封堵混凝土，在封堵混凝土上设有土石渣碾压回填层，在土石渣碾压回填层顶部设有膜下排水管，膜下排气管向下延伸至天然落水洞中；在膜下排水管上方设有粘土垫层，在粘土垫层顶部设有防渗土工膜，在防渗土工膜上方设有粘土保护层，在粘土保护层上方设有土石渣保护层。本发明既能满足土工膜下排水、排气的需要，又能保证库盆内天然落水洞结构的稳定，同时取消了原需要的排水、排气隧洞，简化施工，减少工程量，降低工程投资。
Blocking structure adopting geomembrane horizontal seepage prevention and construction method
一种土工膜水平防渗的封堵结构及施工方法
WANG RUI (author) / ZENG SHUYUAN (author) / ZHANG DONGDONG (author)
2020-06-05
Patent
Electronic Resource
Chinese
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