3 results about "Outer core" patented technology

The invention discloses a stiff composite pile structure for a fan foundation and a design method, a composite pile comprises an anti-corrosion outer core reinforcement body, an anti-corrosion inner core rigid pile and a pile end bearing mechanism, and the anti-corrosion outer core reinforcement body, the anti-corrosion inner core rigid pile and the pile end bearing mechanism are coaxially nested or fixedly connected to form a composite anti-corrosion and cooperative bearing structure; the design method covers the whole process of geological survey, parameter design, performance checking calculation and the like. The problems that under the plain complex geology, the pile body is poor in corrosion resistance, not matched in bearing capacity and large in construction difficulty are solved in a targeted mode, the beneficial effects of being long in corrosion resistance service life, high in cooperative bearing efficiency, high in adaptability and excellent in economical efficiency are achieved, and the long-term service requirement of a draught fan foundation can be met.

The invention discloses an earth and rockfill dam seepage multi-parameter decoupling monitoring method based on a five-core ultra-weak optical cable. The earth and rockfill dam seepage multi-parameter decoupling monitoring method comprises the steps that the five-core ultra-weak optical cable is arranged, and a carbon fiber reinforced polymer layer serves as a center reference core of a heating element and four outer cores which are orthogonally distributed in a cross shape; applying constant current with different gradients to generate thermal excitation and collecting wavelength dynamic response data of each core; the transient temperature rise data of the four outer cores in the heating process are compared, and the azimuth angle and the seepage rate of seepage in the dam are inverted; the strain wavelength data of the four outer cores are decoupled through the wavelength data of the center reference core, and the axial main strain of the dam is extracted; and calculating a resultant curvature intensity, a bending direction angle and a displacement curve of vertical and horizontal displacement based on the decoupled outer core strain wavelength data. According to the invention, high-precision cooperative monitoring of seepage, deformation and pre-stress states of the earth-rock dam is realized, and the safety of the dam is effectively guaranteed.

The invention discloses a method suitable for analyzing drivability of an outer core of a stiff composite pile cement-soil mixing pile, which comprises the following steps: S1, sand layer differentiation pretreatment construction, which comprises the steps of pre-construction investigation and parameter design, layered mixing pretreatment and flexible pile quality pre-control; the method comprises the steps of implantation opportunity control, equal-core positioning and guiding, layered implantation and resistance control and pile body deflection real-time correction. The method comprises the following steps: firstly, carrying out detailed investigation on a sand layer in a construction area, determining the particle size, compactness and gravel-cobble distribution range and content of the sand layers with different depths, dividing three areas, namely an upper loose fine sand layer, a middle transition sand layer and a lower medium-dense coarse sand layer, and designing cement soil stirring parameters in a targeted manner; by implementing the sand layer precise layering, differential stirring pretreatment and filler adaptation technology, the problems that sand layer pretreatment is not uniform, and combination of the flexible pile and the sand layer is weak are effectively solved.