Presumably, after the introduction of the previous issues, everyone has a certain understanding of C-shaped steel, and also has a concept of its structural use. At present, the common C-shaped steel piles of C-shaped steel companies mainly include steel pipe piles and C-shaped steel piles. Cold-formed steel is a product of various cross-sectional shapes bent by steel plates or strips in a cold state. Cold-formed steel is an economical cross-section light-weight thin-walled steel, also known as steel cold-formed section or cold-formed section.

C shape steel is automatically processed by a C shape steel forming machine. The C shape steel forming machine can automatically complete the forming process of C shape steel according to the given C shape steel size. Sectional steel is a bar-shaped steel with a certain cross-sectional shape and size, and it is one of the four major types of steel. According to the shape of the section, section steel is divided into simple section section steel and complex section section steel.

In the coastal alluvial plain area and inland alluvial plain area, the soil is generally thick (50~60m deep) soft soil layer. When the upper structure bears a large load, this foundation cannot be directly used as a bearing layer. The low-compressibility bearing layers in these areas are very deep, and a pile hammer with a large impact force must be used when selecting general pile foundation pile sinking. In this case, conventional reinforced concrete piles and prestressed concrete piles are difficult to adapt. Therefore, most people in such areas choose steel pipe piles to strengthen the foundation.

The C shape steel is hot-rolled flat C shape steel with a length, width and height of 6m1.5m and a thickness of 15mm. The steel pipe consists of a single steel pile with a total length of 12m and a seamless steel pipe with a length of 6m and a wall thickness of 8mm.

The vertical deviation of the C shape steel pile is 1/150, the left and right deviation of the wall along the axis of the foundation pit is 300mm, and the elevation of the bottom of the C shape steel pile is 500mm. Appearance inspection includes surface defects, length, width, thickness, end-to-end square ratio, flatness, etc. Check:

(1) Welding parts that affect the driving of C shape steel piles should be cut off.

(2) Those with cut and section defects should be reinforced.

(3) If the C shape steel pile is severely corroded, the actual section thickness should be measured to determine whether it needs to be thinned in the calculation. Check the appearance of all C shape steel piles before construction, and rectify the steel that does not meet the requirements.

C shape steel pile construction experience and C shape steel factory's proposition:

(1) Before the construction of C shape steel piles, the construction problems in the static load area and dynamic load area should be properly resolved. Due to the selection of C shape steel pile support, the original static load area (conveyance channel, pccp pipe stacking, crawler crane) was cancelled, and all construction was done on one side of the section steel. Do a good job in excavation and transportation, pipeline accumulation, installation and equipment placement and other operations.

(2) During the piling process, sometimes large rocks or other unknown obstacles are encountered, resulting in a lack of driving depth for C shape steel piles. Corner stakes or arc stakes are used to get around obstacles.

(3) During the extrusion process, the C shape steel pile is prone to force deflection due to the lateral extrusion of stones. The C shape steel pile is pulled up 1.0-2.0m in the vertical direction, and then hammered downward to break the large stone due to vibration or displacement, correct the orientation of the C shape steel pile, and reduce the skewness of the C shape steel pile .

(4) When the C-shape steel pile deviates greatly along the axis, special-shaped pile steel is used to correct the deviation. Generally shaped piles are sheet piles with a width larger or smaller than the specification width. Special-shaped piles can be welded according to the actual inclination profile steel. When the inclination is small, the pile can also be pulled in the opposite direction, and hammered with a winch or a winch and a wire rope.

(5) In places where the foundation is relatively soft, adjacent piles are sometimes introduced during construction, and the method adopted is to weld several adjacent piles together.

The above is the relevant knowledge about C shape steel selection and detection that XAK shared with you today. I hope it can be helpful to you after reading it. If you have any needs about C shape steel, welcome to contact us.

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