Linear connection joint and L-shaped connection joint of prefabricated columns and prefabricated wallboards

Abstract

The invention relates to a linear connection joint and an L-shaped connection joint of prefabricated columns and prefabricated wallboards, and belongs to the technical field of underground construction. The prefabricated wallboards, the prefabricated H-shaped columns and the prefabricated L-shaped columns are included. After being matched with one another and connected through high-strength bolts,L-shaped connection ribs on the prefabricated wallboards can be placed in rectangular grooves in the prefabricated columns and are then nailed on the prefabricated columns through self-tapping self-drilling screws, and the overall stability of the structure is greatly improved. In-plate connection pieces can be correspondingly inserted in preserved connection piece grooves formed in the middle portions of the prefabricated wallboards and the prefabricated columns. Self-tapping self-drilling screws are nailed into the wallboards on the two sides of walls, and a further connection strengtheningeffect is achieved. A steel reinforcement cage is arranged between the in-plate connection pieces of the middle portions of the upper wall and the lower wall and corresponds to the lower half portionof the upper side wall and the upper half portion of the lower side wall. A slurry pass hole is formed in the middle of each in-plate connection piece. The shear-bearing capacity of the upper wall part and the lower wall part can be greatly increased through a steel-concrete wall formed at the position of the steel reinforcement cage after grouting.

Description

Technical field [0001] The invention belongs to the technical field of underground construction, and particularly relates to an in-line connection node and an L-shaped connection node of a prefabricated column and a prefabricated wall panel. Background technique [0002] Diaphragm wall is the preferred structural form for deep foundation construction and deep foundation pit enclosure. It has been widely used all over the world. At present, diaphragm wall is replacing many traditional deep foundation and deep foundation pit enclosure structures and construction methods. The underground diaphragm wall has low vibration and low noise during construction, and is suitable for construction in dense urban areas; the wall has high rigidity and good seepage resistance; it can be applied to various geological conditions; it can be the permanent foundation of the superstructure; it can make full use of the building The limited ground and space in the red line give full play to the investmen...

AI Technical Summary

Problems solved by technology

The cast-in-place underground diaphragm wall is currently the most widely used structural form, but it is often difficult to solve the stability of the trench wall and the stability of the trench during the construction of the underground diaphragm wall in the construction of underground diaphragm walls in complex geological conditions such as sandy soil layers. Concrete pouring quality problems caused by wall collapse, resulting in surface exposed bars and holes, local leakage of walls and joints, wall reinforcement cage structure damage and other wall quality defects, affecting the safety and waterproof effect of the underground continuous wall structure

[0003] However, mud is used in the groove forming process and groove wall support of the underground diaphragm wall, and the mud needs to be discharged after pouring concrete, resulting in a large amount of waste mud that needs to be treated, causing serious environmental pollution and increased costs

The construction characteristics of the underwater pouring of the underground diaphragm wall determine that it is difficult to guarantee the construction quality of the wall 100% on the construction site, which is also a quality defect that cannot be improved or made up for the cast-in-place underground diaphragm wall structure

Therefore, the engineering community urgently needs to find a new type of underground diaphragm wall structure that can replace the cast-in-situ diaphragm wall, but the current industry dilemma has not been well resolved

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