732results about How to "Improve the anchoring effect" patented technology

A cartilage plug, which is made from a biocompatible, artificial material, that is used to fill a void in natural cartilage that has been resected due to traumatic injury or chronic disease. Alternatively, the plug may be relied upon to anchor a flowable polymer to subchondral bone. The plug is prefabricatable in any size, shape, and contour and may be utilized either singly or in a plurality to fill any size void for any application. The plug may be formed of a laminated structure to match the physiological requirements of the repair site. A plurality of anchoring elements may share a single upper layer.

The invention relates to artificial valve prosthesis with a valve leaflet clamping device. The manual valve prosthesis comprises a bracket and an artificial valve, wherein the bracket comprises an auxiliary support clamping section and a valve sewing section; the artificial valve is fixedly connected to the valve sewing section; the auxiliary support clamping section is composed of a support bracket, a valve leaflet clamping device and an upper connection fixing section; the leaflet clamping device, the support bracket and the upper connection fixing section are integrally cut; a lower connection fixing section matched with the upper connection fixing section is arranged on the valve sewing section; the bracket is embedded and connected with the lower connection fixing section into a whole through the upper connection fixing section; one part of the valve leaflet clamping device is overlapped with the valve sewing section; the overlapped part is tightly attached to the outer surface of the valve sewing section in a natural state; a bump which protrudes outwards along the radial direction is arranged on a skeleton structure of the valve sewing section in the overlapped region; and a bending section which bends towards the axis direction of the bracket along the radial direction of the bracket is arranged on the valve leaflet clamping device or the support bracket or the upper connection fixing section.

The invention discloses a tension-compression coupled yielding energy-absorbing grouting anchor rod for large deformation of a surrounding rock and a working method thereof. The tension-compression coupled yielding energy-absorbing grouting anchor rod comprise a hollow grouting anchor rod, an anchor rod locking device, a plurality of yielding grouting devices and an energy-absorbing anchor head, wherein a protection sleeve is arranged on a rod body of the hollow grouting anchor rod, a plurality of first grouting holes are formed in the rod body, and the first grouting holes penetrate through the protection sleeve and are communicated with a drilling hole; the multiple yielding grouting devices sleeve the rod body of the hollow grouting anchor rod at intervals, the surfaces of the yieldinggrouting devices are provided with second grouting holes, the energy-absorbing anchor head is fixed to the end of the hollow grouting anchor rod, and the anchor rod locking device is arranged at the free end of the hollow grouting anchor rod. By means of the yielding grouting devices, the real-time reinforcement support at the initial stage of deformation of the surrounding rock is achieved, the step-by-step automatic yielding effect is also played, the large supporting resistance is provided for the anchor rod body through the energy-absorbing anchor head, and the technical problems of anchorrod failure and insufficient grouting caused by high stress and large deformation of the surrounding rock are solved.

The present invention relates to an adhesive anchoring unit and an anchoring method for anchoring fiber reinforcement plastic bar or cable, an end cover is arranged at one end of the anchoring unit and a sleeve with a locating hole is arranged at the other end of the anchoring unit. An internal cone chamber is arranged in the sleeve, and a nut is arranged surrounding the sleeve provided with a mortar filling hole and a ventilation hole. The fiber reinforcement plastic bar or cable passes through the locating hole and one end in the internal cone chamber was cut into two halves, which are inserted with a wedge to become a wedge form. A starting section of the half of one end of the bar or cable is coated with a retaining ring and the section passing through the locating hole is coated with a thin wall aluminum sleeve tube and active powder concrete is filled in the internal cone chamber of the sleeve. The method is described as follows: after the bar or cable shaft passes through the sleeve of the anchoring unit, a pretension is required on the sleeve, and the active powder concrete is added into the sleeve. The present invention improves anchoring performances of the adhesive media and the FRP bar, therefore, the anchoring length is reduced, the structure is simple, the use is convenient, the present invention is safe and reliable, the cost is low and the PRC manufacturing and maintenance is easy.

The invention discloses a coordinated-deformation energy-absorption anchor rod suitable for mining a high-stress large-deformation rock mass. The rod body of the anchor rod mainly comprises an elongated anchoring section straight rod body (1) and an energy-absorption section bending rod body (2), wherein one end, close to the energy-absorption section bending rod body, of the rod body is provided with a threaded section (5); a fastening nut (4) is screwed on the threaded section (5); and a steel pallet (3) is sleeved between the fastening nut (4) on the threaded section (5) and the energy-absorption section bending rod body. The anchor rod is mainly characterized in that: a wavelike bending energy-absorption section in a specific length and a specific shape is mechanized on a long straight threaded steel rod body in a heat treatment mode; the energy-adsorption section restrictively allows a wall rock to deform properly and simultaneously absorb the deformation energy of the rock mass until reaching total allowable deformation quantity meeting a design requirement. In the process, the supporting force of the anchor rod is increased gradually; and finally, after the bending section is completely straightened and a yielding effect controlled by a high-stress roadway ground pressure is achieved, the anchor rod becomes a high-strength rigid resin anchor rod for providing greater supporting force for a supported wall rock mass.

The invention discloses a construction method of a prestressed anchor cable, which comprises the steps of drilling anchor cable holes, fabricating the anchor cable, mounting the anchor cable, erecting an anchor pier, injecting slurry in the anchor cable holes and tensioning the anchor cable according to a design requirement, wherein in the step of fabricating the anchor cable, an inner anchoring section is fabricated into a ripple shape by wire bunching rings and isolating frames that are alternately mounted on steel strands at intervals; a tensioning section is fabricated into a straight-line shape by the isolating frames mounted on the steel strands at intervals; sleeves are mounted on the steel strands of the tensioning section in a sleeving manner; the lower end parts of the sleeves, which are located at a slurry stopping ring, are sealed by structural adhesives; in the step of injecting the slurry in the anchor cable holes, the slurry is injected in the tensioning section anchor cable hole by a tensioning section slurry injection pipe; after the sand slurry is solidified, the slurry is injected in the inner anchoring section anchor cable hole by an inner anchoring section slurry injection pipe; and after the slurry injection of the inner anchoring section is accomplished, the step of tensioning the anchor cable is conducted. The construction method has the advantages that the tensioning section accomplishing the slurry injection serves as the slurry stopping ring for the slurry injection of the inner anchoring section, and a slurry stopping effect can be ensured under any rock mass conditions, so that the quality of the whole anchor cable is ensured.

The invention relates to an anchorage device, in particular to a carbon fiber plate anchorage device used in civil engineering and building construction. The anchorage device consists of an anchor plate and a clamping piece; the anchor plate is a whole part and is internally provided with a wedged-shape through hole, the clamping piece is a two-piece type wedge block, the clamping piece is wedged into the anchor plate for tightly clamping the carbon fiber plate, then the wedge block is in close fit with the wedged-shape through hole in the anchor plate; the anchor plate is of a cylinder with rectangular or square or elliptic or circular cross section, the anchor plate is internally provided with the wedged-shape through hole with the rectangular or square or elliptic or circular cross section and tapering longitudinal section, and the folding contour formed after the clamping piece is wedged into the anchor plate for tightly clamping the carbon fiber plate is the same as that of the wedged-shape through hole with the rectangular or square or elliptic or circular cross section and tapering longitudinal section in the anchor plate; the clamping face of the clamping piece has a layer of a contact reinforcing material of the carbon fiber plate; and the contact surface of the clamping piece and the anchor plate is coated with lubricating oil or lubricating grease. The anchorage device has the advantages of reliable anchoring property, simple and compact structure, convenient manufacture, construction and operation, high efficiency and various shapes, and the anchorage device can meet the requirement of different construction environments.

The invention relates to a proton exchange membrane fuel-cell catalyst, in particular to a high-stability fuel-cell catalyst modified by oxide and a preparation method thereof. The preparation method of the high-stability fuel-cell catalyst modified by oxide comprises the following steps: evenly loading the oxide on a carbon carrier, and then depositing active nano metal particles on the composite oxide carrier, wherein the oxide is any or a composite oxide containing two or more elements of Ti, Zr, V, Cr, Mo, W, Mn, Co, Ni and Si, the mass ratio of the oxide to the carbon carrier is (0.01-1): 1, and the mass ratio of the active nano metal particles to the composite oxide carrier is (1:19)-(6:4). The active nano metal particles are anchored on the surface of the carrier by the oxide so asto be evenly dispersed, so that the binding force between the active component and the carrier is enhanced, the stability of the electro-catalyst is improved, and the durability of operation of a fuel cell is improved.

The present invention provides a double-sided pressure-sensitive adhesive sheet excellent in waterproof property (water stopping property) and impact resistance. The present invention relates to a double-sided pressure-sensitive adhesive sheet including a polyolefin foam substrate and an acrylic pressure-sensitive adhesive layer on both. surfaces of the polyolefin foam substrate, wherein the polyolefin foam substrate has a volume percentage of closed cells of 70% or more and a degree of crosslinking of from 3 to 60 wt %, and the acrylic pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing: an acrylic polymer formed from a component including, as an essential monomer component thereof an alkyl. (meth)acrylate having a linear or branched alkyl group; and a tackifying resin.

The invention discloses a connecting structure for an assembly type concrete shear wall edge member. vertical connecting reinforcing steel bar, which can be provided with an upset head, is reserved through a hole reserved in a large-diameter metal bellows, and is sleeved with a continuous spiral stirrup; then the vertical connecting reinforcing steel bar and the continuous spiral stirrup are commonly inserted into the large-diameter metal bellows; and fine aggregate concrete (or a grounding material) is poured into the metal bellows, so that the reliable connection of the edge member is realized. Due to reliable anchoring of the vertical connecting reinforcing steel bar, the optimization of the diameter, the quantity and the plane arrangement of the vertical connecting reinforcing steel bar, and the increase of the wet joint area on a splicing surface, full exertion of the bearing capacity of the shear wall is ensured; and multiple effective restrain for the subsequentlly-poured fine aggregate concrete (or the grouting material) is formed by the shear wall stirrup, a horizontal tie bar, the metal bellows and the continuous circular spiral stirrup, and thus the integral performance of the part is remarkably improved. According to the connecting method for the edge member, which is provided by the invention, the stress continuousness of the vertical steel reinforcing bar is ensured, the deformaility and the ductility performance of the vertical steel reinforcing bar are remarkably improved, and the shock resistance of the assembly type concrete shear wall is improved. Meanwhile, the method is simple in manufacturing process and facilitates the practice and application.

The invention provides a segmented anchoring and grouting anchor rod device capable of achieving automatic clamping and an anchoring method thereof. According to the device, a grouting anchor rod, a first connecting piece, a cylinder, a second connecting piece and a resin anchor rod are sequentially connected into a rod body through threads; a piston and a piston rod are arranged in the cylinder and are fixedly connected; the end, connected with the second connecting piece, of the cylinder is provided with an annular groove, a plurality of supports are arranged at the end of the cylinder, one end of a movable connection rod is connected with the end of the piston rod, the other end of the movable connection rod penetrates through the annular groove of the cylinder and is hinged to a clamping wing, and the end of the clamping wing is hinged to the supports. According to the device and the method, resin cartridge anchoring and grouting anchoring are fully used, and the clamping wing is added and deeply embedded into the anchor hole wall, so that anchoring force is greatly enhanced. The device and method are suitable for unstable roadways with various mine soft rock crushing, can greatly improve anchoring capacity of a whole anchor rod, effectively improve self-stability of a roadway surrounding rock body, and have the advantages of being good in end anchoring effect, high in anchoring efficiency, convenient to install and the like.

A semiconductor device according to the invention includes an insulating substrate including an insulating plate, a circuit pattern that is formed on a front surface of the insulating plate, and a radiator plate that is fixed to a rear surface of the insulating plate, a semiconductor chip that is fixed to the circuit pattern, an external lead terminal that is connected to a surface electrode of the semiconductor chip through a wiring line, a molding resin that covers the insulating substrate, the semiconductor chip, the wiring line, and the external lead terminal such that a rear surface of the radiator plate and a portion of the external lead terminal are exposed, and an anchor layer including a stripe-shaped concave portion which is formed in the circuit pattern by laser beam irradiation.

The invention relates to a multi-layer telescopic multi-point displacement meter anchor head for water-rich soft stratum. A plurality of in-hole measuring point anchor head units are arranged in the longitudinal direction one after another. Each in-hole measuring point anchor head unit is designed to be a surface contact type and comprises a main anchor head and an anchor head protective cover, wherein each main anchor head is connected with the corresponding anchor head protective cover by a positioning hole. Each main anchor head comprises an indium steel wire, a fixed pulley device, an external force conversion device and an anchor claw execution mechanism; each indium steel wire and each fixed pulley device receive external force; a contraction action is realized by each anchor claw execution mechanism through the conversion and the drive of each external force conversion device; each external force conversion device comprises a tension spring device and a plurality of special springs; each anchor claw execution mechanism comprises a plurality of triangular blade-type anchor claws; and the number of the special springs is the same as that of the anchor claws. The multi-layer telescopic multi-point displacement meter anchor head has the advantages of good anchoring effect, wide measuring range, simple structure, convenience in construction, high anti-sliding capacity, reliable performance and the like.

The invention relates to a self-adaptive cardiac valve prosthesis which comprises a support and an artificial valve. The support comprises a leakproof ring and a valve sewing section which are connected, the artificial valve is fixedly connected to the valve sewing section, and at least part of the valve sewing section is located among autologous valve leaflets of a patient; on the cross section perpendicular to the central axis of the artificial valve, the cross section area of the valve sewing section is smaller than that of the autologous valve annulus of the patient, the valve sewing section cannot directly expand the autologous valve annulus of the patient in the radial direction, in a free state, the cross section area of the leakproof ring is larger than that of the autologous valve annulus of the patient, and the leakproof ring can conform to the uneven contour of the atrial chamber wall or the autologous valve annulus of the patient.

The invention relates to a manual hole digging support pile prestress anchor cable anchoring structure and a construction method of the anchoring structure. The structure comprises a circle of support piles, connecting beams and a prestress anchor cable, wherein the support piles are arranged along the inner side of a foundation pit, the connecting beams are arranged on the pile tops of the adjacent support piles, the prestress anchor cable is divided into an anchor head and an anchoring body, the support piles are respectively provided with anchor holes at the same height in the foundation pit, the anchoring body passes through the anchor holes, the outer end of the anchoring body is fixed by the anchor head, the inner end of the anchoring body is anchored into a rock soil body, and the anchor head is positioned at the outer side of the support pile. The anchoring structure and the construction method have the advantages that the technical problems that the erection of profile steel beams at the waist parts of the support piles are needed by the traditional support pile anchor cable for integral anchoring, and the construction process is relatively complicated are solved; and the technical problems that during the early-stage construction, all support piles cannot be ensured to be on the same vertical surface, the support pile prestress anchor cable of partial belt type steel beams cannot realize the effect, the great waste is caused, and in addition, the manufacture cost is higher are solved.

The invention discloses a rock slope anchoring calculation method based on safety and economy multi-objective optimization. The rock slope anchoring calculation method comprises the following steps: step 1, drawing up calculation parameters of a rock slope; step 2, carrying out stress analysis on the rock slope; step 3, establishing a dual-objective function of rock slope safety and economy; step4, establishing a rock slope safety and economy multi-objective optimization nonlinear mathematical programming model which uses the double-objective function and combines rock balance equation constraint conditions, structural surface yield conditions and anchor rod additional constraint conditions at the same time; step 5, constructing an evaluation function by using a weighted sum method, and converting the nonlinear mathematical programming model for solving the multi-objective optimization into a nonlinear mathematical programming model for solving the single-objective optimization; and solving the model by using a penalty function method of nonlinear programming to obtain a safety coefficient and an anchoring cost which meet the optimal safety and economy at the same time, and an optimal anchoring angle. According to the method, the unification of economy and safety is achieved.

The invention provides a short-chain branch cross-linked water-retaining solvent layer controlled-release type polycarboxylic acid slump retaining agent and a preparation method thereof. The polycarboxylic acid slump retaining agent contains the following components in parts by weight except water: 320-325 parts of polyether macromonomers, 3.0-4.5 parts of sodium hypophosphite, 2.0-6.0 parts of phosphate, 0.5-3.5 parts of hydrogen peroxide, 1.0-2.0 parts of ammonium persulfate, 101.7-124.8 parts of an initiator, 115-160 parts of a small monomer solution and 10-15 parts of liquor of industrialsodium. The method comprises the following steps: 1, performing primary charging; 2, performing secondary charging; and 3, preparing the finished product. According to the method, a reducing agent containing hydroxyl, amido and phosphate, a carbodiimide cross-linking agent, phosphate and other components are adopted, anchoring ability and moisture conditions of the short solvent layer are enhanced, a lubricating effect and a hydrophilic state of cement-based binding material granules are improved, cohesiveness of a cement-based binding material mixture is increased, and the segregation and weeping probability of the mixture is reduced.

The invention provides a kind of prestress steeling reinforcement method for a kind of concrete pile, the method includes following steps: (1) construction preparing; (2) surface preprocess; (3) sets pile corner reinforcing steel and uses clamp to fix them; (4) heats and stretch-draw the banding board, then welds and fixes; (5) pours with high intensity adhesive material between the steel angle and the intervals among the piles; (6) checking; (7) restores the outer decoration layer. The invention uses the improvement of intensity and deformation performance in condition of three-axis pressed to upgrade the bearing of component, it doesn't increases the cross section, thus it won't affect the visible effect in the room; reduces the stress delaying effect. The shake resisting grade is upgraded, the cost is low.

The invention provides an amphoteric early-strength polycarboxylate superplasticizer mother solution for C30 concrete. The polycarboxylate superplasticizer mother solution comprises, by weight, 330-339 parts of polyether macromonomers with the molecular weight being 4000, 22-25 parts of acrylic acid, 11-18 parts of quaternary ammonium and quaternary phosphorus cation micromonomers, 2-5 parts of 27.5% industrial-grade hydrogen peroxide, 3-6 parts of unsaturated sulfonate, 2-4 parts of phosphate functional monomers, 4-8 parts of amide micromonomers, 0.4-1 part of reducing agent, 6-12 parts of caustic soda liquid, 0.4-0.8 part of chain transfer agent and the balance water, wherein the total weight of the components is 1000 parts. The mass fraction of the polycarboxylate superplasticizer mother solution is 40%, and the acid-ether ratio of the mother solution is controlled to be 3.7-4.1. Compared with relatively-low-molecular-weight polyether macromonomers such as polyether macromonomers with the molecular weight being 2400 used by existing common polycarboxylate superplasticizers, the polyether macromonomers with the molecular weight being 4000 and used by the polycarboxylate superplasticizer mother solution have cost advantages and can meet the production requirements of low cost and high effectiveness.