Shandong with the Swiss mining science and technology limited company that construction of prestressed anchor cable frame system has many advantages, but in the actual construction, according to the project specific application, not blind construction, waste.
In the following circumstances, the general can not use the anchor frame beam supporting system:
The slope surface soil cannot withstand the anchor frame beam transfer to system of anchoring force, cannot use this support system, such as slope surface soil is loose, wet, soft soil slope, the surface soil can not afford cable transmitted to the frame girder system of anchoring force, will cause the entire framework of subsidence, fracturing, uneven deformation, so that the whole frame and anchor system failure.
⑵cement and steel has strong corrosive formation can not use the support system, the frame foundation beam with prestressed anchor cable is generally used in permanent slope, prestressed anchor and frame beam requirement during use can not be destroyed, if the reinforcement of slope rock mass of cement and steel corrosion, in a certain period of time, anchor and frame beam occur corrosion damage, the supporting system.
Reserved for anchorage segment formation cannot provide enough anchoring force of slope, not adopting the support form. In accordance with the specification, anchorage segment should not be set in the organic soil, silty soil, liquid limit Wi>50% upper, relative density of DT<0.3 in soil. If the cable length large enough condition, the condition is not satisfied, can not be used with this support form. In addition to the above conditions, if not consider from economic angle of prestressed anchor cable frame, as a kind of light retaining structures, can be a certain amount of various lithological slope disease treatment engineering requirements. Applicable to high and steep, rocky soil of different scale landslide, collapse, landslide and so on artificial and natural disaster, as well as a variety of surface and the slope disease protection.
