Special-shaped freezer used in tunnel steel tube curtain

Abstract

The invention relates to a special-shaped freezer used in a tunnel steel tube curtain. The special-shaped freezer comprises a special-shaped tube arranged on the inner wall of a top tube in an abutting mode, the section of the special-shaped tube is integrally of a triangular structure, the length direction of the special-shaped tube is parallel to that of the top tube, refrigerant channels are formed by the two sides of the special-shaped tube and the inner wall of the top tube, the two ends of the special-shaped tube are welded to the inner wall of the top tube, and a refrigerant inlet and a refrigerant outlet are formed in the two ends of the special-shaped tube respectively and are communicated with a refrigerant outlet and a refrigerant inlet of a refrigerating device respectively. The shape of the section of the special-shaped tube is arranged to be similar to a triangle, and one side face of the special-shaped tube directly serves as the inner wall of the top tube, so that the contact area between the special-shaped tube and the top tube is enlarged to the maximum, it is not necessary to fill the interior of the part, provided with the special-shaped freezer in a laying mode, of the top tube with concrete, personnel can carry out overhaul conveniently, and the freezing construction operation of a main freezing tube in the tunnel steel tube curtain is assisted.

Description

technical field [0001] The invention relates to the technical field of freezing construction methods, in particular to a special-shaped freezer inside a tunnel steel curtain. Background technique [0002] The title of the application filed by the applicant on the same day is "Construction method of steel pipe freezing inside the curtain of large-section underground excavation tunnel", which discloses a construction method for large-section tunnels. Before the tunnel construction, two working shafts are opened at the construction sites at both ends of the tunnel. , through the pipe jacking machine, a plurality of pipe jacking machines are set up around the tunnel to be constructed, thus forming a tunnel steel curtain with very high structural strength. The freezing pipe is passed into the pipe, and the freezing pipe is connected with the external refrigeration equipment. Then, by filling concrete into the jacking pipe, the jacking pipe forms a concrete steel column. When the ...

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Problems solved by technology

[0002] The title of the application filed by the applicant on the same day is "Construction method of steel pipe freezing inside the curtain of large-section underground excavation tunnel", which discloses a construction method for large-section tunnels. Before the tunnel construction, two working shafts are opened at the construction sites at both ends of the tunnel. , through the pipe jacking machine, a plurality of pipe jacking machines are set up around the tunnel to be constructed, thus forming a tunnel steel curtain with very high structural strength. The freezing pipe is passed into the pipe, and the freezing pipe is connected with the external refrigeration equipment. Then, by filling concrete into the jacking pipe, the jacking pipe forms a concrete steel column. When the refrigerant is introduced, the jacking pipe filled with concrete can be quickly implemented The rock and soil where the inner wall of the pipe is located is frozen, so that the pipe jacking filled with concrete forms a frozen main pipe. However, the length of the tunnel is long. To facilitate the inspection and maintenance of the pipe jacking, it is not possible to fill each jacking pipe with concrete. During the concrete filling operation, concrete is filled every other jacking pipe. However, the cross-section of the existing freezing pipes is mostly circular. If no concrete is filled in the jacking pipes, the freezing pipes are mostly located in the jacking pipe when the refrigerant is introduced. The freezing effect is very limited and cannot form an auxiliary freezing to the freezing supervisor

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