50results about How to "Improve pullout strength" patented technology

The invention provides an underwater solvent-free epoxy anchoring adhesive and a preparation method thereof. The underwater solvent-free epoxy anchoring adhesive consists of a component A and a component B in the weight percentage of 1:1, wherein the component A consists of the following components in parts by weight: 30-45 parts of epoxy resin E-44, 5-13 parts of epoxy resin E51, 3-8 parts of diluting agent, 0.5-0.75 part of coupling agent, 0.1-0.2 part of dispersant, 0.1-0.3 part of antifoaming agent, 0.4-3 parts of thixotropic agent, 20-30 parts of active micro silicon powder, 5-8 parts ofcalcium carbonate, 5.6-12 parts of quartz sand and 2-5 parts of aluminum oxide; the component B consists of the following components in parts by weight: 48-54 parts of completely-underwater epoxy curing agent 1085A, 44-50 parts of active micro silicon powder and 0.2-0.4 part of thixotropic agent; the diluting agent is benzyl alcohol; the coupling agent is ND-42 or KH 560; the dispersant is BYK P104S; the antifoaming agent is BYKA530; and the thixotropic agent is bentonite or white carbon black or a mixture of the bentonite and the white carbon black. The underwater solvent-free epoxy anchoring adhesive is prepared by mixing the prepared component A with the prepared component B in the weight ratio of 1:1.

The invention depicts a construction method for indoor light block wall stone dry-hanging. The construction method is applied in the technical field of indoor wall base layer stone dry-hanging. The method is characterized in that a construction procedure of a wall body rear mortar embedded part is adopted, that is, rear holes are formed in a wall body, expansive cement mortar is poured in the rear holes and full-thread lead screws are partly embedded in the expansive cement mortar; by increasing the tensile area of the wall body, the tensile strength is improved, the anti-uplift strength of the rear mortar embedded part is met, and finally stone is anchored with the wall body through the rear mortar embedded part; lots of materials and labor are saved, manufacturing cost is reduced, the net indoor space is properly increased, and energy conservation and environment protection are achieved.

The invention discloses a conical nut wall-linking element of an outer wall scaffold. The conical nut wall-linking element comprises a conical nut body and a wall-linking rod piece which are buried in the side face of a concrete structural beam/slab/column. The wall-linking rod piece is composed of a steel pipe, a steel plate and a threaded rod welded to the center of the steel plate. The threaded rod is matched with the conical nut body in specification, and the steel pipe is welded to the steel plate. In the using process, the threaded rod of the wall-linking rod piece and the conical nut body are screwed and fixed, the wall-linking rod piece is fixed to and buckled with an upright tube of the scaffold through a fastener, and thus, the conical nut wall-linking element is connected with the scaffold. The wall-linking element is simple in structure, convenient to operate, high in anti-uplift strength and good in safety property, the cost is reduced, the overall stability of the scaffold can be guaranteed, the working efficiency is improved, and the construction period is shortened.

The invention relates to a geological reinforcement device capable of effectively improving the connection stability. The device comprises multiple settlement piles, a drilling probe is arranged at one end of each settlement pile in the length direction, a containing groove is formed in the end wall in the direction, away from the corresponding drilling probe, of each settlement pile, and balancing weights are arranged in the containing grooves. An extending side plate is arranged at the end in the direction, away from the corresponding settlement pile, of each balancing weight, and fixed assemblies are arranged among the extending side plates, the balancing weights and the settlement piles. Opposite-pull assemblies are arranged at one ends in the direction, away from the settlement piles,of the extending side plates, a connecting assembly is arranged between the adjacent settlement piles jointly, and a top connecting plate is arranged on the top walls of all the extending side platesjointly. The geological reinforcement device has the effect of effectively improving the stability that the geological reinforcement device is connected with adjacent land parcels.

The invention relates to a high-performance polyurethane synthesizing sleeper and a preparation method thereof. The high-performance polyurethane synthesizing sleeper is obtained by using glass fiberas a framework, impregnating the glass fiber into foamed polyurethane to obtain a sleeper foamed base material, and further processing, wherein the foamed polyurethane comprises the following components in parts by weight: 50-60 parts of polyether polyol A, 10-20 parts of polyether polyol B, 30-40 parts of polyester polyol, 10-15 parts of a flame retardant, 0.2-0.4 part of an accelerator, 0.1-0.3part of an antioxidant, 0.1-0.3 part of an ultraviolet absorbent, 1-3 parts of a foam stabilizer, 0.3-0.5 part of nanoscale cellulose and 92-100 parts of isocyanate. Compared with the prior art, the high-performance polyurethane synthesizing sleeper provided by the invention has the advantages as follows: a product is moulded at one time, the obtained sleeper has excellent mechanical properties and high stability and the like.

The invention discloses an automatic vertical forming machine. The machine comprises a rolled tantalum wire disc which is arranged at the position, on the side face of a vertical mounting frame, above a rack; a tantalum wire is led out of the rolled tantalum wire disc to penetrate into a one-time straightening mechanism above the rolled tantalum wire disc, then penetrate into a tantalum wire supply mechanism above the one-time straightening mechanism, and finally stretch into a mould cavity of a mould in the middle of a horizontal mounting plate in the middle of the rack; a powder shaking mechanism on the left side of the horizontal mounting plate feeds tantalum powder into the mould cavity from a powder shaking box, the tantalum powder allowing the tantalum wire to be inserted is formed through the mould, the tantalum is cut off through a cutting-off flattening mechanism on the right side of the horizontal mounting plate, the head end of the tantalum wire is flattened, and a finished product after compression moulding is fed out. According to the machine, digital control automatic machining is achieved, the machining efficiency is high, the weight and the size of a tantalum block are easy to regulate and control, the quality is better, the mass deviation is not large, one person can control multiple devices to work, manual input is reduced, the machining cost is reduced, and the good use value and economical value are achieved.

The invention discloses an anchoring agent with good thermal stability for a coal mine. The anchoring agent comprises a main material, a curing agent, a filling agent and distilled water. The main material comprises the following components in parts by weight: 100 parts of terephthalic unsaturated polyesters, 1-5 parts of dimethyl-p-toluidine, 2-6 parts of dimethylaniline and 5-15 parts of fumed silica. The curing agent comprises the following components in parts by weight: 100 parts of peroxycyclohexanone, 2-6 parts of carboxymethylcellulose and 2-7 parts of diethylene glycol. The filling agent comprises the following components in parts by weight: 15-30 parts of modified asphalt, 10-30 parts of calcium phosphate bone cement, 5-15 parts of hydroxyapatite, 15-30 parts of calcined clay, 2-10 parts of organobentonite, 5-15 parts of halloysite, 10-20 parts of kieselguhr, 20-40 parts of mica powder, and 15-35 parts of talcum powder. The weight part ratio of the main material, the filling agent and the distilled water is 100: 10-18: 20-40:50-150.

The invention discloses a building low-toxicity epoxy resin grouting material and a preparation method thereof, and relates to the technical field of grouting materials. The building low-toxicity epoxy resin grouting material comprises the following components in parts by weight: 50-60 parts of bisphenol A epoxy resin, 30-50 parts of a curing agent, 10-20 parts of a diluent, 3-5 parts of a coupling agent, 7-10 parts of a defoaming agent, 60-80 parts of quartz sand, 50-80 parts of slag, 60-80 parts of cement, 10-15 parts of an expanding agent and 80-100 parts of water. According to the invention, the grouting material prepared by the invention has good flowability by adding the diluent, has very good mechanical properties and medium corrosion resistance after being cured, has the characteristics of high strength, high flowability, low toxicity and the like; and due to the mixed addition of cement, quartz sand and slag and the synergistic effect of the curing agent, the coupling agent and the expanding agent, the raw materials in the components are promoted to be fused, the compressive strength, breaking strength, pulling strength, creep resistance and other properties of the grouting material are improved, especially the shrinkage rate of the grouting material is reduced, and various comprehensive properties of the epoxy resin grouting material are improved.

The invention relates to a foundation reinforcing device with high pulling strength for a rotary jet grouting drilling machine. The foundation reinforcing device with high pulling strength for the rotary jet grouting drilling machine comprises a limiting barrel, and a plurality of permeation holes are formed in the outer side wall of the limiting barrel; the limiting barrel comprises a positioningcavity, an isolation cavity and an end cavity, the positioning cavity and the end cavity are located at the two ends of the isolation cavity in the length direction correspondingly, the inner diameter of the positioning cavity is larger than that of the isolation cavity, and the inner diameter of the isolation cavity is larger than that of the end cavity; a plurality of bearing columns are arranged in an inner cavity of the positioning cavity, and a positioning cone is arranged on the outer side wall of the positioning cavity; a top connecting plate is arranged on the outer side wall of the end cavity, and a positioning assembly is arranged between the top connecting plate and the positioning cavity; and a connecting assembly for limiting the position of the positioning cavity is arrangedon the positioning cavity. The foundation reinforcing structure has the effects that the anti-pulling strength of a concrete block body and the limiting barrel in the foundation is improved, and theposition stability and the punning property after the foundation is reinforced are effectively guaranteed.

The invention discloses a cast-in-place pile structure. The cast-in-place pile structure comprises an anchor plate. Annular plates are arranged on the two sides of the anchor plate, the annular plates are formed by splicing two plate bodies, and the annular plates and the anchor plate are connected through pin shafts. The annular plates are provided with cast-in-situ bored piles, the number of the cast-in-situ bored piles is two, and the cast-in-situ bored piles are vertically arranged on the anchor plate. The top ends of the cast-in-situ bored piles extend to the outer side of the upper surface of the anchor plate, and the bottoms of the cast-in-situ bored piles penetrate through a pre-stressed anchor cable to extend to the outer side of the lower surface of the pre-stressed anchor cable. A main reinforcement bar is arranged between the two cast-in-situ bored piles, and the two ends of the main reinforcement bar are fixed on the cast-in-situ bored piles. A bag is further included, the top of the bag is placed on the lower surface of the anchor plate, and the bottom of the bag is placed on the inner bottom faces of the annular plates. A reinforcing plate is arranged at the connecting position of the bag and the main reinforcement bar. The cast-in-place pile structure is high in single-pile bearing capacity, high in pulling resistance, capable of enabling cast-in-place piles to be kept at the centers of pile holes as far as possible in the burying process, capable of avoiding excessive rod moving data, easy to construct, capable of driving piles into the earth conveniently, sturdy and durable, and capable of effectively achieving a reinforcement effect.

The invention discloses an anti-pull anchor rod. The anti-pull anchor rod comprises a columnar anchor rod body, wherein the anchor rod body is vertically provided with at least one positioner; the positioner comprises three positioning convex rings which are uniformly arranged on the outer circumference of the anchor rod body; and the positioning convex rings form an isosceles trapezoid structure by taking the anchor body as a bottom side. The anchor rod body is vertically provided with at least one positioner, so that the anti-pull strength is improved and the problems about the upward pull force of a pipe truss on a buttress and the floating force of underwater are solved.

The invention provides a wind-resistant and overturn-preventing external expansion pole foundation for electric power. The pole foundation is arranged underground and used for supporting a pole, so that the pole has better wind-resistant, overturn-preventing and anti-pulling capacity; and the foundation can be reused during pole replacement or line transfer in the future, and investment is not wasted. The foundation is characterized in that the foundation is placed on the ground and directly driven or pressed underground after being straightened; a four-way expansion board is arranged at the lower part of the foundation and can be increased and decreased according to actual conditions, a nut is tightened to allow a two-way conical screw to rise, the expansion board expands in each direction, and the lower part of the expansion board is claw-shaped to strengthen the stability and anti-pulling capacity of the foundation; an inverted horn-shaped countersink is formed in the upper part ofthe foundation, and positioning bolts are arranged on the periphery of the upper part of the inverted horn-shaped countersink; and a heavy electric pole is placed in the inverted horn-shaped countersink, the lower end of the heavy electric pole is clamped at the bottom of the inverted horn-shaped countersink, the positioning bolts adjusts the vertical degree of the heavy electric pole, then, a wedge block is plugged in the inverted horn-shaped countersink to further fix the heavy electric pole, and finally, the countersink is filled with soil.

The invention provides an electric power anti-wind anti-overturning inner expansion electric pole foundation which is arranged below the ground and is used for supporting an electric pole, so that theelectric pole has better wind resistance, overturning resistance and pulling resistance; when the electric pole is replaced or a line is migrated in the future, the foundation can be reused, and investment is not wasted. The electric power anti-wind anti-overturning inner expansion electric pole foundation is characterized in that the foundation is placed on the ground, and is directly driven orpressed into the ground after being straightened; the lower part of the foundation may be provided with four expansion plates, the expansion plates can be separately expanded in all directions by screwing a screw rod, and the lower part is claw-shaped so as to enhance the stability and the pulling resistance of the foundation; and the upper part of the foundation is provided with an inverted horn-shaped counter bore, positioning bolts are arranged around the upper part of the inverted horn-shaped counter bore, a heavy-duty electric power pole is placed in the inverted horn-shaped counter bore,the lower end of the heavy-duty electric power pole is clamped at the bottom of the inverted horn-shaped counter bore, the vertical degree of the heavy-duty electric power pole is firstly adjusted bythe positioning bolts, then a wedge block is inserted into the inverted horn-shaped counter bore to further fix the heavy-duty electric power pole, and finally a hole pit is filled with soil.