Automatic high-pressure water jet device and construction method suitable for excavation of underground diaphragm wall

Abstract

The present invention proposes an automatic high-pressure water jet device and a construction method suitable for excavation of underground diaphragm walls. In the device, both the first leak-proof slurry blocking wall and the second leak-proof slurry blocking wall are provided with water inlet pipes and As for the wall-blocking water pipes, the output ends of all the wall-blocking water inlet pipes are connected to a first high-pressure nozzle; the excavation support wall forms a sliding connection with the first leak-proof slurry wall and the second leak-proof slurry wall; The excavation wall inlet pipe and the excavation wall suction pipe are arranged in the excavation support wall, and the output ends of all the excavation wall water inlet pipes face downward and are connected with a second high-pressure nozzle; A plurality of first steel bars extending in the length direction of the wall; a movable locking unit of the steel cage, which is arranged in cooperation with each first steel bar, and is used to limit the first steel bars. The invention can complete the excavation and grouting of the groove section without the cooperation of other construction tools; during the excavation and grouting process of the groove section, the two excavation support walls always support the soil side wall of the groove section, avoiding the collapse phenomenon.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to an automatic high-pressure water jet device and a construction method suitable for excavating an underground continuous wall. Background technique [0002] The underground diaphragm wall is a kind of trenching machine used on the ground for basic engineering. Along the peripheral axis of the deep excavation project, a long and narrow deep trench is excavated under the condition of mud retaining wall. After the trench is cleaned, it is hung in the trench Reinforcement cages, and then use the conduit method to pour underwater concrete to form a unit trough section. In this way, a continuous reinforced concrete wall is built underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. The reason why the underground diaphragm wall can be used so widely is that it has the following advantages: (1) high efficiency, short constructio...

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Problems solved by technology

[0003] However, in the prior art, the following disadvantages also exist in the construction process of the underground diaphragm wall: (1) Under the geological conditions of muddy soil, the soil side wall of the groove section is easy to collapse due to no support, which makes the construction of the underground diaphragm wall difficult: ( 2) During the construction process, there are many construction tools involved, resulting in a more complicated construction process and a longer working time

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