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在观音寺闸众多的裂缝中，最严重、最令人费解的是闸底板中部垂直于水流方向的贯穿性裂缝，该裂缝由于初现期不清而众说纷纭。在广泛收集原始资料，进行必要的科学实验和参考类似成果的基础上，进行了深入细致的计算分析工作，对闸室贯穿性裂缝的原因和稳定性进行研究，认为中、边墩施工期的温度及收缩应力是底板产生贯穿性裂缝的主要原因。裂缝本身不会危及水闸安全。
Among the many cracks in the Guanyinshizhitang, the most serious and the most puzzling is the through-going crack in the central part of the sluice floor, perpendicular to the water flow, which is divided due to the unclear initial appearance. Based on the extensive collection of original data, the necessary scientific experiments and the reference of similar results, a thorough and detailed calculation and analysis work was carried out to study the reason and stability of the sluice-through cracks. It is considered that during the construction period Temperature and shrinkage stress are the main reasons for the through cracks in the bottom plate. The crack itself does not endanger the safety of the sluice.