Steel pipe pile common quality problems and the reasons as follows:

1, less than the required compressive strength of concrete indicators:

① excessive considering saving cement, saving water reducer;

② gravel poor quality, or quality fluctuations;

③ concrete mixing poor quality;

④ superplasticizer poor quality;

⑤ curing system is unreasonable, let Zhang low stripping intensity, constant low temperature or time is shorter when the autoclave curing;

⑥ laboratory personnel quality test block is not, the operation is not standardized; three large discrete trial itself.

For the above cases, the improved method is to improve the technical quality of the laboratory personnel and management personnel, and the transformation of mixing building materials, weighing systems, but also to improve the conservation system.

2, end plate tilt:

① steel and Cutting allowed, so upsetting the length of the head after the tensile reinforcement is inconsistent;

② Center for the screw head to pull the lever center for craft sheets, screw easily skew, or screw and pull the head itself is not perpendicular to the plane due;

3, trailer coupling wire holes or trailer coupling cellular concrete short:

Concrete mixing ratio inappropriate; or concrete mixture is too dry and hard, are the direct cause of poor workability of concrete. Concrete mix workability can be, but when casting is uneven, especially trailer coupling material shortage, filling not full, and the centrifugal system is caused by improper trailer coupling short of the end face of the cellular and external reasons, resulting in the wire hole honeycomb Another reason is a screw not tightened, causing the slurry flow. Cellular and trailer coupling short trailer coupling can undermine the robustness of the construction in hammering method is easy to pile head smash.

4, pile bending:

① steel and Cutting allowed to make reinforcement discontinuity, uneven concrete cross-section of compression, resulting in bending appearance;

② tensioning process, centrifugal process, and even steam curing process, due to quality problems upset head, steel quality problems, resulting in a small amount of reinforcement fracture in the above process, so that the entire cross section of the concrete piles into eccentric compression, so the appearance of the pile the resulting bending;

③ pile stiffness mold itself manufacture enough or on a different heart, good flatness, causing piles made ​​of curved shape.

5, the outer surface pockmarked face, sticky skin and seam ran pulp:

① Pock - the workability of concrete and steel overheating problems;

② sticky skin - mold release improper selection or stripping strength is too low;

③ commissure ran pulp - vertical, mainly mold deformation, pad of the poor, when the mold hekou not clean or tighten the screws on the symmetry; hoop, bad skirt smoother and not put the proper ring seal.

6, the inner surface of the floating pile pulp is too thick, the inner surface of the peaks appear like:

①C3A content greater than 8%;

② powder material too;

③ Mixed with cement or fine mineral powder through fine, good water saturation, centrifugal water can not be isolated;

④ cement and water reducer they match the quality is not good;

⑤ touch with deformed or centrifuge uneven subsidence caused by the centrifugal speed falters, beating at high speed mold, from the so-called concrete is not hard;

Adverse ⑥ centrifugal system, high-speed centrifugal stage speed is too slow, too short.

7, the inner wall of exposed stone:

① concrete mix is poor;

② graded gravel bad;

③ centrifugal system problems;

④ centrifuge is not stable.

8, reduce the "frost" phenomenon:

When the centrifugal acceleration time is too short, the hierarchical serious, they produce, to completely eliminate the "frost" phenomenon is impossible, it is inevitable physical and chemical phenomena, but a suitable centrifuge system could reduce this phenomenon;

For mixed oxide siliceous material in the autoclave conditions not only increase the strength of concrete, but also eliminate most of the "frost."

    Shandong Sheng Machinery Co., Ltd. has been dedicated sub-cement products machinery research and development, production and sales, with advanced equipment, superb technology and two years of professional experience, the company has always been at the forefront of research and development center block making machine market development , watching the advanced technology at home and abroad, to develop products for the investment needs of different users, there are block making machine, hydraulic tile machine, cement pipe machine, blender, hanging roller machine, wire rod machine equipment. Currently has 19 branch offices and six foreign countries (Nigeria, Tanzania, Algeria, Kenya, Mozambique, Ethiopia) and exported more than 100 countries and regions