The application of steel support and the problems that need to be paid attention to during construction

The application of steel support and the problems that need to be paid attention to during construction

With the development of the domestic economy,while the construction industry is developing to high altitudes,the utilization of underground space has also become an important direction.Whether it is up or down,the base or floor formwork is inseparable from steel supports.Steel support is a kind of column cast from steel material,which is combined to form a structural frame and plays a supporting role.Compared with traditional wooden supports,it has economic and environmental protection characteristics such as sturdiness and solidity,recyclability and reuse,and is widely used in modern building construction.As a support tool,using thick rebar isthe choice.The following introduces the scope of use of steel supports and what problems should be paid attention to during construction.

What are the specific applications of steel supports?

1.Building construction.Building construction is first of all to lay the foundation,everyone knows the importance of the foundation,if you want to build a stable building,you must ensure the solidity of the foundation,so what is the foundation used to support?Of course,choose steel supports.High-rise buildings need safe and reliable steel supports to stabilize the foundation,and the steel materials used in Yuantuo steel supports produce strong and extremely strong steel supports to meet the needs of building construction.

2.Metro tunnel support.When carrying out underground tunnels,it is always necessary to support the shape of the geooil,otherwise it will collapse at any time.During the construction of the subway,steel supports are used to support the earthen wall so that the construction personnel can carry out safe work.

3.Construction outside the building.For high-rise buildings,external construction still needs supports or elevators,of course,steel supports can also be used to protect the building,so that it is not easy to drop tools and accidents occur during construction.

The above is a brief introduction to the application of steel supports,which are very common in the construction industry.

What issues should be paid attention to when carrying out steel support construction:

1.The steel support(grille)should be prefabricated by the factory,and the stakeout should be 1:1,and the axis,size,and the alignment of the joint splicing plate should be strictly controlled to meet the requirements of the specification for welds.

2.The positioning of the steel support(grille)and the layout of the locking anchor should be carried out after the inspection of the excavation section is qualified,and it should be installed strictly according to the design part,and the orientation,direction,angle and depth of the anchor hole should meet the design requirements.

3.The steel support(grille)should be erected,and its axis should be perpendicular to the center line of the tunnel,and sufficient solid foundation should be reserved at the foot of the steel frame during construction,and the groove should be dug in place when the steel frame is erected.The line and elevation should be accurate,the support should be stable,and its inclination should not be greater than 2.Any part of the steel frame should not deviate from the plumb surface by more than 5cm.The over-excavation part should be supported with hard cement mortar.

4.The crane or excavator should be equipped with steel support,and pay attention to safe operation.After the steel support(grille)bolt is installed,the technician should inspect and record it.

5.In order to enhance the overall stability of the steel frame,the steel frame should be firmly welded with the longitudinal connecting bars,structural anchors,positioning tie-ups and locking foot anchors.

6.The steel frame connection joints should be firmly connected.The arch foot part is prone to plastic shear failure,so in addition to bolting,the joint should also be welded on all sides to ensure the rigidity and strength of the joint.When conditions permit,angle steel joints are used to facilitate the full grip of concrete.

7.When there is a large gap between the steel frame and the initial spraying layer,a horse-riding or wedge-shaped spacer should be set up to top the surrounding rock;The spacing between the steel frame and the surrounding rock should not be more than 5cm.

The responsibility of safe construction is heavier than Mount Tai,and good steel support and reasonable construction are the keys to ensure the safety of construction personnel,ensure the smooth operation of the project,and shorten the construction period.