# Experimental Study on the Straw Flexible Space Assembly Flood Control System
## 5 Conclusions  
A straw flexible space assembled flood control system was designed on the basis of Revit, and the straw flexible space theory was proposed. Further, a straw flexible space theory verification test was conducted on the scaled-down model of the flood control system using a water-retaining test machine. The test results were compared with the ABAQUS finite element analysis results through static and dynamic water tests. Thus, the feasibility of the straw flexible space assembled flood control system was verified. The main conclusions of this study can be summarized as follows:  
1. The flood control system is mainly composed of a straw flexible water barrier, column, tilt rod support, and base. According to the elasticity of the straw material proposed by the straw flexible space theory, the straw flexible space can transform the wave impact kinetic energy from static water to dynamic water in the flexible space as well as into potential energy of straw compression and thus drain away part of the impact of the flood. Therefore, it plays a buffering role, improves the stability of the flood control system, and provides impact resistance;
2. The straw has a supporting effect on the baffle after water absorption and expansion, which makes the strain value of the baffle with straw under hydrostatic conditions greater than that without straw. Thus, straw as a filler in the flood control system can not only enhance the stability of the system but also satisfy the theoretical assumption of a flexible spatial flood control system with straw;
3. The straw strain value of the water barrier with straw was less than that without straw under different working conditions of dynamic water. The straw flexible space plays a buffering role to offset the impact force, and the system is stable and well-sealed under different working conditions, which proves the feasibility of the straw flexible space assembly flood control system;
4. A comparison of the test results with the finite element analysis results showed that the overall change pattern is the same. The test results were slightly smaller than the numerical analysis results. Nevertheless, both were in good agreement, and the comparison error was between 5% and 8%, which verifies the accuracy of the numerical analysis method.  
L.L.: Investigation: Methodology, Software, Formal analysis, Funding acquisition, Writing--original draft, and Writing--review and editing. Y.S.: Methodology, Formal analysis, and Writing--review and editing. X.Y.: Investigation, Software, Formal analysis, and editing. Y.Y.: Methodology and Formal analysis. T.X.: Writing--review and editing. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the Harbin Applied Technology Research and Development Project (Outstanding Subject Leader): Research and Development of Complete Set of Technologies for Straw Flexible Spatial Assembly Flood Control System (No. 2017 RAXXJ009).  
Not applicable.  
Data Availability Statement: The data used to support the findings of this study are included within the article.  
The authors declare no conflict of interest.