How to deal with seismic joints, expansion joints, and settlement joints in high rise buildings

The method of settling joints is post-pouring tape.

Leave it in the part with less stress, the steel bar passes as usual, and the pouring belt should be reinforced after the foundation settles. If you are afraid that the effect of the foundation post-pouring belt is not good, the concrete should be covered with a formwork after pouring to prevent debris from being filled. A more effective way is to excavate 50cm more after excavation, and the sundries do not need to be picked up directly to pour the full completion.

Irregular structures are provided with anti-seismic joints.

When the length and height of the plane exceed a certain limit, an expansion joint is set.

When there is a huge difference between the height and weight of the main structure and the podium, a settlement joint is set.

The key is to deal with the anti-seepage of the seismic joints, expansion joints and settlement joints in the underground parts. We have more than 30 years of experience in the design and construction of waterproof plugging structure reinforcement, and have done a lot of such plugging maintenance projects, specializing in treating various leakage and incurable diseases. Provide free professional technical guidance for concrete waterproof leakage repair, and introduce high-quality plugging materials.

Oneform different

Expansion joints generally have fillers in the joints, such as foam boards, rock wool and other materials, to ensure the sealing effect; Settlement joints refer to vertical joints, and the gaps are very small, such as for the use of stepped joints for sealing, the transverse gaps should also be filled; As for the shockproof joint, the general gap is larger, ranging from 20mm to 100mm, and the specific gap size should be determined according to the design requirements.

Second, the meaning is different:

Due to the temperature change, the uneven foundation and the influence of the first factor, it is easy to deform or destroy the building, so the house should be divided into several independent parts in advance when designing, so that each part can change freely and independently. This type of reserved joint, which separates the building vertically, is called a deformation joint. Including expansion joints, settlement joints and shockproof joints.

Main role. Prevent cracks in the house due to climate change. The practice is: along the length of the building every certain distance to reserve a gap, the building from the roof, wall, floor and other above the ground components are all disconnected, the building foundation because it is buried in the ground by the temperature change is small, do not have to be disconnected.

The width of the expansion joint is generally 20 mm to 30 mm, the joint is filled with insulation material, and the spacing between the two expansion joints is clearly specified in the building structure code.

It is summarized as follows:

Construction joints: Joints formed by interrupting construction as planned due to the limitation of the construction process are called construction joints. Due to the layered pouring of concrete structures, the gap formed between the concrete in this layer and the previous layer of concrete is the most common construction joint.

So it's not really a sewn, but a face;

Settlement joints: joints set to overcome the uneven settlement of the structure must be completely separated from the foundation to the superstructure;

Expansion joint: a joint set up to overcome excessive temperature stress, and the foundation can be continuously opened;

Seismic joints: joints set up in order to make the building more regular, in order to facilitate the seismic resistance of the structure, the foundation can be continuously opened.

In the seismic fortification area, the settlement joints and expansion joints must meet the requirements of seismic joints.

Expansion joint refers to a structural joint vertically arranged along the appropriate part of the length direction of the house in order to prevent cracks or damage to the structure due to climate and temperature changes (heat expansion, cold contraction). The expansion joint is to divide the building components above the foundation, such as walls, floors, roofs (except wooden roofs), into two independent parts, so that the building can be expanded horizontally along the long direction.

When the height, load and structural form of the adjacent parts of the house are very different and the foundation is weak, the house may produce uneven settlement, resulting in cracking of some weak parts. For this reason, settlement joints should be set in appropriate locations such as complex plane or body shape turns, height changes, loads, compressibility of the foundation and significantly different methods of foundation treatment.

The difference between settlement joints and expansion joints is that in addition to the roof, floor, and wall, the foundation part must also be disconnected.

In order to avoid damage to the building, the vertical structural joints that are installed according to the seismic requirements are called seismic joints. The joint is generally arranged at the sensitive part of the structural deformation, and is fully arranged along the top surface of the house foundation, so that the building is divided into several units with uniform stiffness and independent deformation.

The requirements for the setting of settlement joints and seismic joints are basically the same, and sometimes the two can be set in the same place, that is, a joint can be used as both seismic joints and settlement joints.

How to cover joints when expansion joints, settlement joints, and shockproof joints are located on exterior walls, floors, floors, roofs, etc.

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The method of covering the joints when the pro-expansion joints, settlement joints, and shockproof joints are located on the exterior wall, ground, floor, roof, etc., as follows: The setting of the expansion joint: The maximum spacing of the expansion joints should be determined according to the structure of different materials.

Structure of expansion joint: expansion joint is to separate all the building components above the foundation, and leave an appropriate gap between the two parts, and the joint width is generally 2040 mm. The structural treatment of the expansion joint can be a single wall or a double-wall load-bearing scheme for the structural arrangement of the wall, floor and roof of the brick-concrete structure, and it is best to set it in the place where the plane graphic changes, so as to facilitate the hidden treatment.

The frame structure generally adopts the cantilever beam scheme, and can also adopt the double beam and double column mode, but the construction is more complicated. Wall expansion joint structure: brick wall expansion joints are generally made into flat joints or staggered joints, and a brick and a half thick exterior wall should be made into staggered joints or tongue-and-groove joints. Which side of the outer wheel of the exterior wall is commonly used to plug the seams of hemp silk or wood wool board and foam plastic strips and ointment elastic waterproof materials soaked in asphalt, and when the gap is wide, the tung burn can be treated with galvanized iron sheet and aluminum sheet as a cover seam.

Interior walls can be covered with metal skin or wooden strips. The position of the expansion joint structure of the floor layer expansion joint should be consistent with the deformation joint of the wall and roof. The seam is sealed with compressible deformed paste, asphalt hemp wire, metal or plastic adjusting sheet and other materials, and the movable cover plate or rubber is laid on the top to prevent dust from falling.

The cover seam strip at the ceiling can only be fixed at one end to ensure that the components at both ends of the seam can be freely expanded. The roof expansion joint structure is not human, the roof is generally built at the expansion joint, the roof waterproofing and flashing are basically the same as the conventional practice, the difference is that the iron concrete slab or tile at the cover joint should be able to allow free expansion and deformation without causing leakage, and the roof of the master is caulked with caulking oil paste and pay attention to waterproof treatment. Hope mine can help you <>

Do you have any other questions?

Summary. Expansion joints can prevent deformation due to contraction and expansion when the temperature changes; Settlement joints are deformations caused by the different elasticity of different foundations and building materials; The shockproof joint is to alleviate the deformation caused by the ** action.

What kind of deformation do expansion joints, settlement joints and anti-vibration joints correspond to?

Expansion joints can prevent deformation due to contraction and expansion when the temperature changes; The settlement joint is caused by the different elasticity of different foundation and building materials. The shockproof joint is to alleviate the deformation caused by the ** action.

In addition, the shrinkage joint can also prevent cracks caused by temperature changes, reduce the force on the structure and the impact force on the structure; The settlement joint can prevent the impact of changing the elasticity of the foundation from rolling out when the bearing capacity of the foundation is insufficient; The seismic joints can reduce the damage of the building by the first action.