Pressure regulating chamber structure excellent in hydraulic performance and convenient to construct

The utility model provides a surge chamber structure with excellent hydraulic performance and convenience in construction, which comprises a surge chamber and a tunnel, the surge chamber and the tunnel are arranged at an interval and are connected through a connecting pipe, and a construction adit for constructing the tunnel is arranged on one side of the tunnel; the tunnel structure is characterized in that the surge chamber is arranged in a mountain body above the position where the tunnel is formed, and the surge chamber is perpendicular to the tunnel; a first adit and a second adit are arranged at the connecting position of the construction adit and the tunnel in a forked mode. According to the utility model, the surge chamber is arranged at the top of the tunnel, so that excellent hydraulic performance of the surge chamber can be ensured; and meanwhile, the second adit is matched with the first adit to conduct tunnel construction treatment, it can be guaranteed that the surge chamber and the tunnel do no