Traditional valve chamber construction involves multiple steps, is time-consuming, season/environment dependent, has safety risks, and is inefficient. Precast Assembled Valve Chambers, developed by the company, solve these issues. They are mainly divided into two types: small/medium diameter and large diameter. They offer advantages like convenient assembly, good sealing/stability, improved quality, significantly shortened construction time, reduced difficulty, safety, environmental benefits, and for large chambers, enhanced structural stability, safety, and longevity. This represents an advanced construction method with high efficiency, low cost, and energy saving. The large-diameter chamber uses an assembled structure system with steel-connected concrete frames and sandwich insulation concrete modules, offering strong load-bearing, seismic resistance, good seepage prevention, corrosion/aging resistance, and high production/installation efficiency. The assembled system facilitates maintenance and reduces O&M costs.