5 results about "Double wedge" patented technology

The application discloses a method for judging the clamping degree of a double-wedge locking rope device on a steel wire rope cage, which measures the height from the upper end surface of a wedge block to the upper end surface of a wedge box and the opening of the double wedge to judge the clamping degree of the double-wedge locking rope device on the steel wire rope cage, and the required data is convenient and fast to obtain, high in accuracy, simple to calculate and strong in reference, greatly improving the safety and reliability of the double-wedge locking rope device, and being suitable for judging the clamping degree of the double-wedge locking rope device on the steel wire rope cage of various models.

A rock bolt includes a wedge-based expansion mechanism. The expansion mechanism includes a drive wedge arranged to expand an intermediate wedge upon tensioning of the rock bolt, wherein the intermediate wedge is arranged to expand a wedge device attached to an outer tube of the rock bolt. The use of the intermediate wedge enables greater expansion of the rock bolt.

The invention provides a railway engineering rigid panel reinforced soil retaining wall aseismic design method, which belongs to the technical field of roadbed engineering, and comprises the following steps of: determining design conditions of a reinforced soil retaining wall, determining a structural form and used materials of the reinforced soil retaining wall, preliminary design of the reinforced soil retaining wall is carried out; based on a double-wedge theory, calculating a rib material strength design value of the reinforced earth retaining wall and a resultant force applied behind the reinforced earth retaining wall, checking and calculating safety, usability and repairability, judging whether the reinforced earth retaining wall meets performance requirements required by design or not according to checking and calculating results, if yes, performing detailed design of the reinforced earth retaining wall, and if not, returning to preliminary design of the reinforced earth retaining wall. The problems that an existing railway engineering rigid panel reinforced earth retaining wall only controls strength and stability in design and lacks deformation control standards and aseismic design, so that large-scale application in high-speed railway engineering with millimeter-level deformation control and high-intensity earthquake areas is difficult are solved.

This application relates to the field of mechanical assembly technology, specifically to a device and method for fixing a rolling guide rail using inverted double wedges. The device includes a base, a slide rail disposed on the base, a first wedge, a second wedge, and a first fastener. A rectangular groove is formed on the base, and a threaded hole is provided at the bottom of the rectangular groove. The first and second wedges are arranged side-by-side within the rectangular groove, with the inclined surfaces of the first and second wedges contacting and engaging each other, and the installation directions of the first and second wedges being inverted. The side of the first wedge closest to the slide rail has a first vertical working surface for pressing against the side of the slide rail; the side of the second wedge furthest from the slide rail has a second vertical working surface for pressing against the inner wall of the rectangular groove. The first fastener passes through the first wedge and connects to the threaded hole on the base. Tightening the first fastener drives the first and second wedges to move relative to each other along their engaging inclined surfaces.

The utility model relates to the technical field of shield construction, in particular to a wedged type prefabricated shield segment waterproof structure which comprises a plurality of prefabricated shield segments and wedge-shaped waterproof strips installed between every two adjacent prefabricated shield segments. A plurality of prefabricated shield segments are connected to form a prefabricated shield segment unit; a wedge-shaped mounting hole is formed in the longitudinal cutting face of each prefabricated shield segment, the two wedge-shaped mounting holes in every two adjacent prefabricated shield segments are buckled to form a double-wedge-shaped mounting hole, and the wedge-shaped waterproof strips are mounted in the double-wedge-shaped mounting holes. An arc-shaped protrusion is arranged on the front transverse cutting face of each prefabricated shield segment, an arc-shaped groove is formed in the rear transverse cutting face of each prefabricated shield segment, and the arc-shaped protrusions are matched with the arc-shaped grooves. Underground water can be effectively prevented from permeating from longitudinal gaps and transverse gaps of the segment units, potential safety hazards of a tunnel are eradicated, the safety of the tunnel is improved, and the later maintenance cost of the tunnel is reduced.