# Experimental Study on the Straw Flexible Space Assembly Flood Control System
###### Abstract  
By using straw to build an assembled flood wall, this study provided new ideas for useful applications of straw and for the development of assembly flood control facilities. A straw flexible space assembly flood control system is designed on the basis of Revit, and a hydraulic test of a scaled-down model of the system is conducted using a water-retaining test machine to prove the stability and impact resistance of the system. Finally, a numerical analysis model of the straw flexible space flood control system is established using ABAQUS software to perform finite element analysis of the system. A comparison of the test results and the numerical analysis results shows that they can be well fitted. Thus, this study lays a theoretical foundation for a large-scale engineering application of the proposed system.  
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weeks of continuous rainfall caused the Danube River to flood, so the Austrian town effectively prevented flooding by temporarily erecting a riverside flood break before the water level rose [18].  
Many researchers have conducted numerous studies on flood walls, including the side-turning flapper type [19], the lift type [20], water-filled rubber bags, and water-filled woven bags [21], and mechanical tests and finite element simulations have been carried out. [PERSON] et al. [22] carried out water retention tests on a lightweight mobile floodwall using a water retention testing machine to analyse the force forms and damage patterns of the lightweight mobile floodwall. [PERSON] et al. [23] used ANSYS numerical simulation to construct a reasonable floodwall model and carried out field floodwall tests based on the simulation. [PERSON] et al. [24]. conducted an experimental study on the mechanical properties and leakage characteristics of mobile flood control systems. [PERSON] et al. [25] studied the application of movable steel gate plates in the Harbin Daoli embankment section of the Songhua River. [PERSON] et al. [26] studied the application of a new type of assembled flood wall for urban flood control in Wuhan. [PERSON] [27] studied a type of urban underground space entrance and exit based on mobile flood protection walls.  
In summary, detailed studies on the comprehensive utilization of straw have been conducted worldwide, and major breakthroughs have been achieved in the fields of biology, construction, and energy. However, the straw research base is extensive, and the comprehensive use of straw requires continuous development. Various types of assembled flood walls have been developed, and the literature [22; 23; 24] analyses the mechanical properties and leakage characteristics of mobile floodwalls by means of tests and finite element simulations; however, existing mobile flood walls are rigid systems with poor flood protection performance. In this study, a straw flexible space assembly flood protection system is proposed, where straw is an important material of the water barrier developed to facilitate the reuse of the flood control device. Furthermore, straw flexible space theory is applied to not only enable the proposed system to mitigate the impact of floods and complement mobile flood walls but also ensure the comprehensive use of straw.