Development of concrete block for improving water environment by making use of natural purification

1. Techno-rock是一种混凝土砌块，最初是为了在高流量时保护河床而设计的。揭示了该砌块在河流中具有净水能力和创造生态系统的功能。通过实验研究了如何同时提高块体的动力和环境能力。为了防止冲刷或沉积，在砌块的顶部和内部孔上附加阴影的效果进行了检查。在测试的几种遮光罩类型中，垂直孔内附着的双遮光罩对冲刷和沉积的保护效果最好。上游顶部的遮荫层降低了冲刷速率，而下游洞口的遮荫层则阻止了沉积。最近，人们试图恢复河流中受损的生态系统，并改善流域管理。我们提出了维持或创造河岸生态系统的母岩。该地块由两个空间组成，都与土地直接相连。上面的空间填满了石头，以便排水良好，这样就可以保护河岸免受破坏。下层空间计划用适合稳定植物植被的土壤填充。这对稳定银行是有用的。创造野生动物栖息地，提供准自然景观。

1. Techno-rock is a concrete block which was originally designed as a protector of the riverbed during high water discharge. It is revealed that the block has a water purifying ability and a function of creating ecosystem in rivers. Experiments were performed to investigate how to enhance both dynamical and environmental abilities of the block. In order to protect scour or sedimentation, effects of attaching shades at the top and the inside a hole of the block were examined. Among several types of shades tested, two-shades type attached to the inside of the vertical hole were most effective to protect both the scour and the sedimentation. Shades sttached at the top of the upstream side reduced the scouring rate, whereas shades in the hole of the downstream side prevented the sedimentation.2. Very recently, attempts have been made to restore damaged ecosystems in rivers and to improve watershed management. We have proposed the Mother's Rock which maintains or creates ecosystems along riverbanks. The block consists of two spaces, both are directly connected to the land. The upper space is filled with stones to drain well, so that banks should be protected from failure. The lower space is planned to be filled with soil suitable for stabilizing plant vegetations. The block can be useful in stabilizing the bank. creating wildife habitat and providing quasi-natural landscapes.