Brief description of assembled Corrugated metal pipe 

      Assembled corrugated metal pipe (DGHG) is a high-quality road decoration building material that replaces round pipe culverts, cover culverts, arch culverts and bamboo bridges.
 
      Assembled corrugated metal pipe have the characteristics of short construction period, very light weight, convenient installation, good performance, low engineering budget, strong deformation resistance, and reduced maintenance costs after the entire line is opened to traffic. It is especially used in severe cold and frozen soil. The subgrade treatment area of subgrade engineering has significant economic benefits.

      Assembled steel corrugated pipes include ring steel corrugated pipes, elliptical steel corrugated pipes, semi-circular steel corrugated pipes, etc. The exported corrugated culvert can also be made into oblique openings according to the proportion of slope protection. The production and processing of metal corrugated pipes has a range of Φ0.5m～Φ8m, The wall thickness is 3mm～7mm, which can meet the requirement of backfilling soil with a thickness of 0.5m～40m.

The development history of assembled corrugated metal pipe in countries all over the world

     1.1 In 1896, the United Kingdom launched a new round of project feasibility of corrugated metal pipe safety passages and assembling corrugated metal pipe;

      2.1 In 923, the British Railway Engineering Research Association used steel and metal corrugated pipe safety channels to carry out physical line inspections on the central government railway line in Illinois;

      3.1 1929 Australia’s first corrugated metal pipe was used in a coal mine;

      4.1 In 931, Canada completed the first construction of an 8-meter corrugated metal pipe to complete a trolley safety passage

      5.1 In 1990, the Japanese National Expressway Design Standard established the technical standards for the design concept of corrugated metal pipe. The installation and application of corrugated metal pipe in various countries around the world confirmed the practicability of this type of structure in various application conditions. Its service life has exceeded the service life of the design concept.

       6.1 The application of corrugated pipe culvert in our country is based on the application in highways after 2001.

         The construction of steel metal corrugated pipe culvert usually requires first excavation of pipe trenches for laying pipes on pure natural roads or backfills that have been rigorously compacted. The width of the trench should not only facilitate the ramming of the pipe side backfill, but also consider the basic total width necessary in the design concept.

  The engineering construction work experience shows that the construction of diversion tunnels on the road with low backfill soil is better to fill the roadbed works first, and then dig the trenches to lay the culverts in the foundation pit.

   Steel metal corrugated pipe base or basic regulations are well-proportioned and firm together, and should have serviceability.