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    Chosuk HD is a specialized company in soft ground improvement, with accumulated construction methods and know-how since 1970.

    Construction Method

    Chosuk HD is a specialized company in soft ground improvement, with accumulated construction methods and know-how since 1970.

    New P.B.D (Plastic Board Drain)

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    Improved method of existing PBD method



    1. Method overview


    This is an improved method of the PBD method of the weak ground treatment method, and it is a method that can construct with the highest quality by using advanced measuring equipment and a device that can maintain the type angle vertically.



    2. Method characteristics

    1) The PBD method is easy to procure construction materials, has a fast construction speed, and has lower construction costs than other methods.

    2) The NEW PBD method is a method that constructs a new quality PBD by using various measuring elements, improved equipment, and improved materials. 

    3) Characteristics 

      ① Maintains verticality with the horizontal adjustment device of the mandrel.

      ② Prevents collapse (attaches follow-up detection sensor)

      ③ When a slope exceeds the specified value or collapse occurs, a warning light and buzzer sound.

      ④ Penetration resistance measurement. 

      ⑤ Real-time automatic recording device. 



    3. Construction method and order

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    1) Preparation work 

      ① Checking the inclination

    The driver checks the value of the inclination detection sensor through the construction management monitor, and if it is tilted more than the allowable standard value, adjusts the verticality using the inclination adjustment device.

      ② Mounting the anchor plate

      ③ Switch the automatic wheel to the pulling mode to prevent the material from being blown away or loosened by the wind in advance.

    2) Mandrel penetration 

      ① While maintaining the verticality of the leader, penetrate to the required depth

    While checking the depth, hydraulic pressure, and inclination values ​​through the construction management monitor, penetrate to the required depth

      ② Lock the automatic wheel when the target depth is reached

    During the penetration work, switch the pulling mode maintained to the locking mode to prevent the material from following along.

    3) Mandrel Pulling 

      ① Pulling is performed when the required penetration depth is confirmed

      ② Automatic wheel switching to pulling mode

    The driver switches the wheel to pulling mode immediately after starting the pulling and checks the material following through the monitor

    4) Work completion 

      ① Decision

    If completed normally, there is no change in the warning light or buzzer, and all data is printed without any abnormality on the construction graph. If the following or inclination exceeds the specified value, the warning light lights up and the buzzer sounds. At this time, follow-up measures are taken according to the relevant regulations.

      ② Move to the next work location