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2 results about "Stonelayer" patented technology
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A stonelayer, or soil stonelayer, or stone line, is a three-dimensional subsurface layer, or soil horizon, dominated by coarse particles (>2mm), that generally follows (mimics) the surface topography (Sharpe 1938). A stonelayer occupies the basal horizon of two-layered soil biomantles (Paton et al. 1995; Schaetzl and Anderson 2005; Fey 2009; Wilkinson et al. 2009). A stonelayer may be one stone thick, and thus appear in a trench or pit as a "stone line," or it may be several stones thick and appear as a "stone zone" (Johnson 1989). The gravel components of stonelayers may be compositionally variable, and while many are lithic clasts, often of quartzose composition, others may be metallic nodules and concretions of iron and manganese oxides, human artifacts, snail and clam shells (in highly calcareous soils), precious and semi-precious stones, or some combination thereof (Aleva 1983, 1987; Johnson 2002).
Offshore drilling method using a hollowed-out backfilling pile section
The present application relates to the technical field of offshore foundation construction, and discloses a method for drilling into a collapsed backfilling section of a near-shore rock-filled hole, comprising the following construction steps: 1) forming a concrete slab on a rock-filled layer at a construction site; 2) drilling a pre-drilled hole section in the concrete slab by a rotary drilling machine; 3) inserting a casing into the pre-drilled hole section; 4) rotating the casing into the rock-filled layer by the rotary drilling machine, and forming a collapsed area between the concrete slab and the rock-filled layer; 5) drilling a peripheral hole in the concrete slab and connecting the peripheral hole with the collapsed area; 6) backfilling the peripheral hole with peripheral clay to fill the collapsed area; 7) the rock-filled layer has in-hole rock filling and in-hole clay backfilling; 8) extruding the in-hole clay into the gap of the in-hole rock filling by a punching hammer in the casing, and synchronously crushing the in-hole rock filling until the punching hammer penetrates the rock-filled layer to form a rock-filled hole section, thereby avoiding further expansion of the collapsed area and realizing stable and efficient drilling construction effect.
Owner:SHENZHEN GONGKAN GEOTECHN GRP +1
Construction method of combined drilling and piling of offshore pile in deep thick rock layer
This invention relates to the technical field of near-shore foundation construction, and discloses a method for combined drilling and pile formation of cast-in-place piles in deep rock-fill layers near the coast. The method includes the following steps: 1) A rotary drilling rig lowers a casing into the rock-fill layer; 2) The rock-fill layer has a collapsed area and an outer peripheral hole; 3) Clay is backfilled into the outer peripheral hole, filling the collapsed area; 4) The rock-fill layer has stones inside the hole and clay is backfilled inside the hole; a perforating hammer is used to drill a hole in the casing until a rock-fill section is formed; 5) The rotary drilling bucket drills into the soil layer until a soil section is formed; 6) The rotary drilling bucket drills into the rock layer until the bearing stratum is formed, creating a rock section. The rock-fill section, soil section, and rock section together form the pile hole; 7) A reinforcing cage is lowered into the pile hole; 8) Concrete is poured into the pile hole, and after the concrete solidifies, a cast-in-place pile is formed. Through optimization of the casing installation, rock-fill drilling, segmented pile formation, and casing removal, efficiency improvement and quality assurance are achieved.
Owner:SHENZHEN GONGKAN GEOTECHN GRP +1