Individual four-sided shaped modules used in an assembly for underground storage of storm water and other fluid storage needs. Modules are assembled into a resultant four-sided tiling shape for maximized structural strength and material use efficiency. Internal four-sided shaped modules are assembled and encased by external four-sided shaped modules. Internal adjacent modules are in direct fluid communications with one another through a channel-less chamber. Internal four-sided shaped modules drain into four-sided shaped modules chamber where fluid is either stored or drained. Assemblies include various top and side pieces along with access ports for entry into said assembly.

Individual square shaped modules used in an assembly for underground storage of storm water and other fluid storage needs. Modules are assembled into a resultant square tilling shape for maximized structural strength and material use efficiency. Internal square shaped modules are assembled and encased by external square shaped modules. Internal adjacent modules are in direct fluid communications with one another through a channel-less chamber. Internal square shaped modules drain into square shaped modules chamber where fluid is either stored or drained. Assemblies include various top and side pieces along with access ports for entry into said assembly.

Individual four-sided shaped modules used in an assembly for underground storage of storm water and other fluid storage needs. Modules are assembled into a resultant four-sided tiling shape for maximized structural strength and material use efficiency. Internal four-sided shaped modules are assembled and encased by external four-sided shaped modules. Internal adjacent modules are in direct fluid communications with one another through a channel-less chamber. Internal four-sided shaped modules drain into four-sided shaped modules chamber where fluid is either stored or drained. Assemblies include various top and side pieces along with access ports for entry into said assembly.

A device for constructing an underground reservoir by dissolving limestone using carbon dioxide. The device includes a CO.sub.2 storage tank; an absorption tower; a decompression valve; a gas-liquid separator; a crystallizer; a vacuum pump; a buffer tank; a first booster pump; a second booster pump; and a third booster pump. The decompression valve is connected to a limestone layer, and is connected to the gas-liquid separator. The absorption tower is connected between the gas-liquid separator and the limestone layer.

A device for constructing an underground reservoir by dissolving limestone using carbon dioxide. The device includes a CO.sub.2 storage tank; an absorption tower; a decompression valve; a gas-liquid separator; a crystallizer; a vacuum pump; a buffer tank; a first booster pump; a second booster pump; and a third booster pump. The decompression valve is connected to a limestone layer, and is connected to the gas-liquid separator. The absorption tower is connected between the gas-liquid separator and the limestone layer.

A construction layout for caverns of an underground nuclear power plant, including: two primary caverns accommodating nuclear reactor powerhouses, electric powerhouse caverns, safe powerhouse caverns, auxiliary powerhouse caverns, nuclear fuel powerhouse caverns, connecting powerhouse caverns, a first primary traffic tunnel, a third primary traffic tunnel, a second primary traffic tunnel, a fourth primary traffic tunnel, and a primary steam channel. The electric powerhouse caverns, the safe powerhouse caverns, and the nuclear fuel powerhouse caverns are arranged along the longitudinal direction of the mountain. Each of the safe powerhouse caverns and each of the nuclear fuel powerhouse caverns are disposed on two sides of each of the two primary caverns in the longitudinal direction of the mountain, respectively. Each of the electric powerhouse caverns and each of the safe powerhouse caverns are located on a same side of each the two primary caverns.

A construction layout for caverns of an underground nuclear power plant, including: two primary caverns accommodating nuclear reactor powerhouses, electric powerhouse caverns, safe powerhouse caverns, auxiliary powerhouse caverns, nuclear fuel powerhouse caverns, connecting powerhouse caverns, a first primary traffic tunnel, a third primary traffic tunnel, a second primary traffic tunnel, a fourth primary traffic tunnel, and a primary steam channel. The electric powerhouse caverns, the safe powerhouse caverns, and the nuclear fuel powerhouse caverns are arranged along the longitudinal direction of the mountain. Each of the safe powerhouse caverns and each of the nuclear fuel powerhouse caverns are disposed on two sides of each of the two primary caverns in the longitudinal direction of the mountain, respectively. Each of the electric powerhouse caverns and each of the safe powerhouse caverns are located on a same side of each the two primary caverns.

A system and method of preventing an explosion of a natural caldera. The system includes an artificial caldera, formed by a spiral tunnel that extends from a surface of the earth to a position close to a surface of a magma plume of the natural caldera. A plurality of charges, such as tactical nuclear charges, are placed at positions along a length of the spiral tunnel, and detonated to form the artificial caldera. The method includes determining a center of the natural caldera, constructing the spiral tunnel, placing the plurality of charges within the spiral tunnel at fixed intervals, and detonating the plurality of charges simultaneously. Detonation of the plurality of charges opens the artificial caldera and allows magma thereunder to be controllably released through the artificial caldera. In this manner, a pressure of the magma is reduced, and a cataclysmic explosion of the natural caldera is mitigated.

The present invention relates to a tunneling method, and particularly, to a tunneling method by installing an internal pre-support member and a corresponding post support member in an alternate manner or by installing an external pre-support member and a corresponding post support member in an alternate manner, and an apparatus, respectively, therefor. The tunneling method includes: excavating a pilot tunnel in a main tunnel to be constructed; radially forming a drilled hole from an excavation surface of the pilot tunnel to a tip end of the pre-support member of the main tunnel at a plurality of locations in the pilot tunnel to install the pre-support member; inserting the pre-support member into the drilled hole, and conducting grouting and performing curing to fix the pre-support member; excavating the tunnel in stages in a longitudinal direction along an excavation line of the main tunnel and primarily spraying shotcrete to an excavation surface of the main tunnel in the main tunnel; installing a post-support member between a plurality of the pre-support members on the main tunnel surface to which the shotcrete is primarily sprayed; and connecting the pre-support member and the post-support member with a plate type support member.

The present invention relates to a tunneling method, and particularly, to a tunneling method by installing an internal pre-support member and a corresponding post support member in an alternate manner or by installing an external pre-support member and a corresponding post support member in an alternate manner, and an apparatus, respectively, therefor. The tunneling method includes: excavating a pilot tunnel in a main tunnel to be constructed; radially forming a drilled hole from an excavation surface of the pilot tunnel to a tip end of the pre-support member of the main tunnel at a plurality of locations in the pilot tunnel to install the pre-support member; inserting the pre-support member into the drilled hole, and conducting grouting and performing curing to fix the pre-support member; excavating the tunnel in stages in a longitudinal direction along an excavation line of the main tunnel and primarily spraying shotcrete to an excavation surface of the main tunnel in the main tunnel; installing a post-support member between a plurality of the pre-support members on the main tunnel surface to which the shotcrete is primarily sprayed; and connecting the pre-support member and the post-support member with a plate type support member.