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广东省沙坑活动橡胶渡槽位于原广州市郊区人和区东南面的沙坑河上。该处于1975年利用旧有的过底涵改建成反虹涵工程,由于工程质量差,竣工不久通水运用即被洪水冲垮,致使25000亩农田断绝了水源。人和区(公社)拟重建一座反虹涵工程以解决其下游的农田灌溉。这个方案不但工程费当时需五万多元,水泥55t,钢材8t,而且因河床砂层厚,渗流量大,施工十分困难。在春耕前建成通水灌溉。压力很大。
Guangdong province sand pit activity rubber aqueduct is located in the suburbs of Guangzhou City, the suburbs and the southeastern area of the sand river. The project was rebuilt into an anti-Hong-han project by using the old over-culverts in 1975. Due to the poor quality of the project, it was flooded shortly after the completion of the project. As a result, 25,000 mu of farmland were cut off from the water. People and districts (communes) intend to rebuild an anti-syngenetic project to address farmland irrigation downstream. This program not only required more than 50,000 yuan for engineering fees, 55 tons of cement and 8 tons of steel, but also was difficult to construct due to thick sand beds and large seepage. In the spring before the completion of irrigation. A lot of pressure.