Inverted tower type reverse multi-path underground diaphragm wall water stop structure and construction technology

Abstract

The invention discloses an inverted tower type reverse multi-path underground diaphragm wall water stop structure and a construction technology. The water stop structure comprises an underground groove, a first diaphragm wall and a second diaphragm wall are arranged in the underground groove, a water stop groove section is arranged between the first diaphragm wall and the second diaphragm wall, a prefabricated reinforced water stop structure is installed in the water stop groove section, an inner profile steel combined steel pile is arranged in the middle of the prefabricated reinforced concrete water stop structure, a water stop groove block is poured outside the inner profile steel combined steel pile, and tongue-and-groove rough surfaces are arranged on the left end face and the right end face of the water stop groove block. The construction technology comprises the steps that a, an underground groove is excavated and silt removal treatment is performed; b, concrete is poured at the bottom of the underground groove for bottoming; c, segmental hoisting and static pressure prefabrication of the reinforced concrete water stop structure are carried out; d, underground diaphragm wall reinforcement cages on the two sides of the prefabricated reinforced concrete water stop structure are hoisted and placed; e, a guide pipe is lowered, and concrete is poured underwater. According to the construction method, the water stopping technical scheme of steel and concrete combination, prefabrication and cast-in-place combination and reverse multi-path combination is adopted, the safety of an enclosure structure is improved, and the water stopping effect is improved.

Description

technical field [0001] The invention relates to the technical field of railway construction, in particular to an "inverted tower type" reverse multi-path underground diaphragm wall water-stop structure and construction technology. Background technique [0002] In subway construction, the waterproof problem of underground diaphragm wall construction is related to the safety of the overall construction. In recent years, there have been many safety accidents caused by the water leakage of the ground connection wall, and overcoming the waterproof problem of the ground connection wall has become a sensitive issue in the industry. [0003] The traditional prefabricated underground diaphragm wall has no joints in the length direction, resulting in a single prefabricated underground diaphragm wall that is too long and weighs too much, which is not suitable for transportation and hoisting; at the same time, the excavation depth of the foundation pit applicable to the prefabricated un...

AI Technical Summary

Problems solved by technology

[0003] The traditional prefabricated underground diaphragm wall has no joints in the length direction, resulting in a single prefabricated underground diaphragm wall that is too long and weighs too much, which is not suitable for transportation and hoisting; at the same time, the excavation depth of the foundation pit applicable to the prefabricated underground diaphragm wall is very shallow. The scope is very limited and the economy is very poor, which greatly restricts the application of prefabricated underground diaphragm wall technology. Therefore, an "inverted tower" reverse multi-path underground diaphragm wall water-stop structure and construction technology are needed

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