Tube drawing bench for construction in underground narrow space and construction method

Abstract

The invention discloses a tube drawing bench for construction in an underground narrow space and a construction method. The tube drawing bench comprises a traveling system and a tube drawing system, wherein the traveling system comprises a traveling chassis, a main arm, a lifting arm and a tube drawing winch, the tube drawing system comprises a tube twisting disc retracting and releasing structure, a tube twisting disc, a protective cylinder and a protective cylinder receiving disc, the protective cylinder receiving disc is connected with the main arm through a connecting rope, the tail end of the connecting rope is connected to the tube drawing winch, the protective cylinder is connected to the bottom end of the protective cylinder receiving disc, the tube twisting disc is connected to the tube twisting disc retracting and releasing structure, and the tube twisting disc retracting and releasing structure is arranged outside the traveling chassis. According to the tube drawing bench, the sectionally-arranged protective cylinders are matched with the main arm with the shortened length, so that the overall height of the tube drawing bench is reduced, the construction requirement for tube drawing in an underground narrow space is met, the tube twisting disc is arranged to repeatedly twist the protective cylinder in the pulling-out process to reduce the friction force during lifting, and the protective cylinder is stably and efficiently pulled out under the combined action of filing and upward pulling.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a tube pulling machine and a construction method for construction in a small underground space. Background technique [0002] As a deep foundation, pile foundation is widely used in foundation pit support, slope reinforcement, landslide control, structure anti-floating and anti-tilting, dam foundation stability and anchorage foundation of suspension cable structure. In most cases, the geological conditions are complicated. It involves hole-forming construction, but the above-mentioned projects provide enough space for the piling machine to operate, and the operation is relatively simple. [0003] In recent years, with the rapid development of underground engineering construction, a large number of pile foundation projects in small underground spaces have appeared. At present, the construction method of manual digging piles is mostly used, but manual digging piles ha...

AI Technical Summary

Problems solved by technology

[0002] As a deep foundation, pile foundation is widely used in foundation pit support, slope reinforcement, landslide control, structure anti-floating and anti-tilting, dam foundation stability and anchorage foundation of suspension cable structure. In most cases, the geological conditions are complicated. It involves hole-forming construction, but the above-mentioned projects provide enough space for the piling machine to operate, and the operation is relatively simple

[0003] In recent years, with the rapid development of underground engineering construction, a large number of pile foundation projects in small underground spaces have appeared. At present, the construction method of manual digging piles is mostly used, but manual digging piles have poor working environment and poor safety performance for construction personnel. , high labor costs, low pile-forming efficiency and other defects, it has been unable to adapt to the trend of engineering mechanized construction, and the risk is very high

[0004] The technology of pile foundation construction on the ground is relatively mature, but for underground engineering, due to the constraints of the narrow operating space of the machinery, the underground engineering itself is in the rock and soil mass, which has extremely high requirements on the stability of the surrounding rock and soil mass. The weight of the equipment itself is also limited, so the traditional above-ground extubation technology cannot be used in small underground spaces

At the same time, the commonly used pipe pulling technology in pile foundation is crawler crane combined with vibratory hammer to pull out the steel casing. In this method, the length of the steel casing is longer, and the height of the lifting and pulling equipment required is also high, which cannot meet the requirements of the underground space. Clear height requirements; during the process of pulling out the casing, the casing has been hammered and vibrated many times, which will cause strong vibration to the soil in the underground cavern and seriously threaten the safety of underground engineering

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