SELECTING A DIAPHRAGM WALL GRAB EQUIPMENT
Selecting a diaphragm wall grab equipment would require first excamining the geology in which it is required to be used and the productivity required as per schedule. Accordingly, the appropriate type of grab/trenching equipment is chosen from the available types.
After chosing the type, further selecting a particular equipment would entail going through the technical specifications of various manufacturers to find the grab that would match the requirements of the project.
Following are the main selection factors:
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Width of the diaphragm wall panel - dictates the width of grab to be employed
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Type of soil - decides what amout of force is required during excavation and wether any addition such as chiseling device is required and thus the weight and the thrust capacity requirements.
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Depth of diaphragm wall - dictates the max. trench depth capacity of the grab
Futher, the features listed in the page should be considered too.
A sample technical specifications sheet is provided below.
