Zhang Wei, Wei Ruoqi, Zhou Minghong, Zhou Mingwei,
Papers # 2018 Las-Vegas
This article gives a brief introduction of plastic inspection chambers in China. It focuses on the formulation of China's national standard for plastic inspection chambers and conducts the theoretical analysis and data validation of the key technical metrics in the standard for the following three tests: the structural integrity test, the long-term axial loading test and the actual underground engineering test. It also compares the advantages and disadvantages of three evaluation methods and provides suggestions for the structural design, construction backfilling and standard setting of plastic inspection chambers in China.
The evaluation methods of the long-term performance of plastic inspection chambers are mainly categorized into two types: laboratory evaluation and underground test. We established the following test methods differing by the stress conditions: the structural integrity test, the long-term axial loading test (without sand backfill), and the actual underground engineering test. This paper selects municipal injection inspection chambers (SLJ-1000 and SLJ-700) that are the more representative products in China, as the study object. It firstly analyzes the structure of plastic inspection chambers, then studies their long-term stress conditions, and finally explains the tests on them by using the different methods above. This paper provides an important theoretical basis for the formulation of a Chinese national standard for plastic inspection chambers.