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Construction joints refer to the joints set at the joints of various parts of the building, which are used to accommodate the deformation of building materials and structures, such as thermal expansion and contraction, settlement and deflection, as well as to prevent cracks and water leakage. The following is a brief introduction to the application site of construction joints, and introduces their setting methods and spacing requirements.
1. Construction joints in the main structure of the building:
Construction joints are set between one floor and another and between one section and another section of the main structure of the building (such as walls, columns, beams, etc.). This kind of construction joint is generally called a structural joint, which can be divided into vertical construction joint and horizontal construction joint. Vertical construction joints are generally arranged at the junction of walls, columns and other structures to withstand the horizontal displacement of the structure and prevent cracks; Horizontal construction joints are generally set between floors to withstand the thermal expansion, cold contraction and settlement deformation of floors.
2.Construction joints of the exterior walls of buildings:
Construction joints are set up in the cracked parts of the external wall of the building (such as plate joints, corners, etc.). This kind of construction joint is generally called an exterior wall joint, which is used to separate the thermal expansion and cold contraction deformation between the exterior wall plates.
3.Construction joints on the roof of buildings:
Construction joints are set up in the cracked parts of the roof of the building (such as expansion joints, corners, etc.). This kind of construction joint is generally called roof joint, which is used to separate the thermal expansion and contraction and settlement deformation between the roof slabs, as well as drainage.
The setting method and spacing requirements of construction joints are as follows:
1. How to set:
a.According to the design of the building, determine the location and length of the construction joint.
b.Strengthen reinforcement on the basis of the location of construction joints, such as setting stiffeners, thickening walls, etc.
c.Fill the construction joint position with special materials, such as construction joint tape, sealing materials, etc., to ensure the sealing and water resistance of the construction joint.
d.According to the specific situation, choose the appropriate construction joint material, such as rubber, plastic, etc.
2.Spacing requirements:
a.The spacing of construction joints is generally determined according to the structure of the building and the characteristics of the material, and in general, the spacing should be between 6-9 meters.
b.The width of the construction joint should be determined according to the size and deformation of the building, in general, the width should be 10-30mm.
Construction joints are set in the main structure, exterior walls and roofs of the building to accommodate the deformation of building materials and structures, and to prevent cracks and water leakage. The method of setting up construction joints includes determining the position and length, strengthening and reinforcing, filling materials, etc. The spacing requirement is generally 6-9 meters, and the width is 10-30mm.