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The invention provides a light promoting dehalogenation compound medicament / light combined method for removing halogenated organic matters in water, which relates to a method for removing halogenated organic matters in water. The invention overcomes various defects existing in the process of removing halogenated organic matters in water by using the current gas stripping method, activated carbon adsorption method, electrochemical removing method, advanced oxidation method, transition metal catalytic reduction method, vacuum ultraviolet technique or permeable reactive barrier technique. The method of the invention comprises the following steps: adding the light promoting dehalogenation compound medicament into the water containing halogenated organic matters for stirring, and then, carrying out optical radiation. The method of the invention does not need multi-stage removal, does not need expensive oxidants and catalysts, does not generate secondary pollution, does not need expensive vacuum ultraviolet light sources and high-energy radiation sources, can utilize common and cheap ultraviolet pop light sources or even expanding to visible light sources, improves the utilization efficiency of the light energy, can quickly remove the halogenated organic matters, can conveniently design a reactor, meets the requirements of various water bodies, is convenient in management, and can ensure the safety of the water quality.

The invention discloses an underground station open excavation construction method comprising the following steps that 1, slope excavation is conducted on the ground of a planned-built underground station; 2, prefabricated left and right frame segments are hoisted into an excavation pit and are fixedly assembled in the length direction of the underground station, bilaterally symmetrically arrangedstation lower layer pilot tunnels are formed, then track laying, power supply and communication are completed, thus the station have passing conditions in advance, the left and right frame segments comprise bottom plates, lower side walls, end floors, lower frame columns and end platform plates; 3, center floors, center platform plates and an upper station layer are constructed; and 4, the upperportion of the station is backfilled. Meanwhile the invention further discloses another underground station open excavation construction method. Through the construction method, construction of the underground station is achieved, traffic passing of a tunnel is completed in advance, thus early use of a track line is ensured, the travel needs of people are met, and construction time of the whole underground station is also shortened.