Membrane structure landscape How to design drainage? What issues should be considered in the drainage design of tensioned membrane structures? On these issues, I believe that those who are interested in doing membrane structure landscape would like to know about it. The membrane structure needs to face various harsh climates, and rainwater is often encountered, so it is important to do a good job in drainage of membrane structure. Today, let's take you to understand.
The membrane structure landscape design shall reasonably determine the drainage slope and drainage direction according to the use characteristics of the landscape and the requirements of the general layout, so as to ensure the smooth drainage of the membrane surface; In areas with heavy snow load, large film slope and necessary snow prevention measures shall be selected.
The membrane structure landscape drainage design still uses the non arranged drainage or the arranged drainage method. Due to the unique shape of the membrane structure landscape and the free surface, the reasonable method of modeling and drainage should be fully considered. The drainage slope of membrane structure is required to be greater than that of general landscape. The slope of flat film shall be more than 15%~20%, and the ridge of hyperbolic film shall be more than 10%. The pretension of one membrane surface is more than 1.0~2.0kNm, so as to prevent the membrane material from large deformation under the action of rain, resulting in ponding and water pocket on the membrane surface. The water in the membrane area has the characteristics of Matthew effect, and ponding will lead to partial depression deformation, which in turn aggravates the ponding phenomenon. Sufficient slope, curvature and tension level are necessary conditions to ensure smooth drainage. The design of membrane structures such as water guide plate, water guide ditch and downpipe should be in harmony with the structural design of membrane nodes.
Large public membrane structure landscape (3000m2) or above should adopt arranged drainage; Small open membrane structure landscape (below 500m2) can adopt non arranged drainage; The medium-sized public membrane landscape (500m2~3000m2) should select appropriate drainage form according to its elevation, tightness and openness. Partial free drainage is allowed, and drainage is arranged in the structure.
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