3results about How to "Controllable duration" patented technology

The invention relates to the technical field of slope supporting construction of constructional engineering, and particularly discloses a redundant and safe reinforced soil structure and a construction method. Reinforced soil is of a multi-step structure and is constructed on a weathered rock foundation; the reinforced soil sequentially comprises a plain concrete foundation, multiple layers of integral steel-plastic geogrids, a graded broken stone drainage layer, a clay water-resisting layer, a waterproof geomembrane, a concrete sealing bottom and plain filling soil from bottom to top, and reinforced concrete panels are poured on the outer sides of the integral steel-plastic geogrids. A reinforced concrete foundation is arranged at the bottom of the reinforced concrete face plate, a cement soil cushion layer is laid at the bottom of the reinforced concrete face plate, drainage holes and pre-embedded steel tie bars are arranged in the reinforced concrete face plate, the pre-embedded steel tie bars and the whole steel-plastic geogrids are bundled up, and a gravel inverted filter bag is arranged in each layer of steel-plastic geogrids. The clay water-resisting layer and the gravel drainage layer are laid to achieve redundant safe water prevention and drainage, the construction period is controllable, and the manufacturing cost is relatively low.

This invention discloses a construction method for rotary drilling piles used in water conservancy and hydropower engineering. The method involves setting up a first row and a second row of rotary drilling piles at a predetermined elevation on the river-facing side of the foundation pit. These piles interlock and their tops are flush. A capping beam is also included at the top of the first and second rows of rotary drilling piles, connecting and fixing them into a vertical, closed wall. A diaphragm wall is also installed inside the foundation pit, with one end connected to the solid wall and the other end connected to the bedrock. The interlocking of the two rows of rotary drilling piles, along with the construction of the capping beam and diaphragm wall at the top of the piles, forms a continuous, closed foundation pit protection structure. The entire construction process facilitates the excavation and layout of the outlet retaining wall foundation after the flood season, saves construction time, reduces construction costs, and provides functions such as cofferdam seepage prevention, scour prevention, soil retention, foundation pit protection, and foundation bearing capacity.

The utility model belongs to the technical field of tube wells, and particularly relates to a modular frame structure of an assembled tube well, which comprises a plurality of tube wells, a pair of long steel bars and a pair of short steel bars are respectively sleeved on the peripheries among the plurality of tube wells, and the adjacent long steel bars and short steel bars are connected through bolts. A plurality of spacing steel bars are connected between the two long steel bars through bolts, and the spacing steel bars are located between the two adjacent tube hoistways; the upper ends of the support joists are connected to the lower ends between the two long steel bars, the lower ends of the supporting stand columns are installed at the upper ends of the corresponding structural beams, the upper ends of the structural beams and the lower ends of the adjacent supporting stand columns are connected into a whole through the studs, and the structural beams provide upward-supporting horizontal supporting faces for the adjacent supporting stand columns. The lower ends of the supporting stand columns take the adjacent structural beams as fulcrums to lift the support joists upwards, the frame assembling process is completed, and the problems that an existing assembly type tube well modular frame structure is low in traditional construction efficiency and poor in safety are solved.