Prefabricated Slab for House Slope Protection

Prefabricated slabs can be used in house slope protection projects, and their construction plans cover key points such as project overview, construction scope, specifications of prefabricated slabs, anchor parameters, drainage systems, and material requirements.

Project Overview: Slope protection projects primarily target natural soil slopes, aiming to address issues such as soil loosening and minor collapses, and enhance the slope's resistance to sliding and erosion. The use of prefabricated slabs offers significant advantages, including fast construction speed, strong structural stability, and easy maintenance in the later stages.

Construction Scope: This includes the cleaning and leveling of the slope surface to ensure flatness; drilling and grouting of anchor bolts to enhance slope stability; installation and fixation of prefabricated slabs to form a continuous protective layer; construction of drainage systems to prevent water accumulation from damaging the slope; and protective treatment of the slope crest and toe to further ensure slope safety.

Specifications of Prefabricated Slabs: Prefabricated slabs are made of C30 concrete, with common dimensions of 1500mm in length × 1000mm in width × 150mm in thickness. The slabs are reinforced with φ8@200 bidirectional steel mesh to enhance their crack resistance. Four φ12 anchor bolt holes are reserved, with a hole position deviation of no more than 10mm to ensure the installation accuracy of the anchor bolts.

Anchor Parameters: Anchor bolts are made of HRB400 grade φ25 deformed steel bars, with lengths designed to be 3m - 5m according to the slope depth to adapt to different geological conditions. The spacing between anchor bolts is 1500mm × 1000mm, corresponding to the dimensions of the prefabricated slabs for easy installation. The drilling diameter is 110mm, and grouting is done using M30 cement mortar to ensure a firm connection between the anchor bolts and the slope.

Drainage System: A 300mm wide and 200mm deep intercepting ditch is set at the slope crest to prevent rainwater from directly eroding the slope. Vertical drainage blind ditches are set every 5m on the slope surface, filled with gravel with a particle size of 50 - 80mm and wrapped with geotextile to effectively drain accumulated water within the slope. A 400mm wide and 300mm deep drainage ditch is set at the slope toe, constructed with M10 cement mortar and MU30 rubble stones to further guide water flow and protect the slope foundation.

Material Requirements: Prefabricated slabs must be produced by qualified manufacturers, who should provide concrete mix proportion reports, steel bar material certificates, and factory inspection reports to ensure material quality. Anchor bolt steel bars should be selected from HRB400 grade deformed steel bars, cement should be P·O 42.5 grade ordinary Portland cement, and the mud content of sand and gravel should be no more than 3% and 1%, respectively, to ensure construction quality and slope stability.