57results about How to "Improve pullout resistance" patented technology

The utility model discloses a kind of foundation structure and wind turbine generator set of wind turbine generator set, it is related to wind power generation technical field, wherein, foundation structure includes first bearing platform, second bearing platform, multiple bored piles and multiple anchor rods, the top surface of first bearing platform is connected with the connecting cylinder for connecting the tower cylinder of wind turbine generator set;Second bearing platform is set below first bearing platform, the top surface of second bearing platform projects the bottom surface of first bearing platform and forms step surface, the vertical projection of the bottom surface of first bearing platform in second bearing platform forms core area, the edge of second bearing platform forms the expansion area surrounded in core area;Multiple bored piles are distributed in core area with interval, each bored pile extends downward from the bottom surface of second bearing platform, and bored pile is vertically arranged;Multiple anchor rods are distributed in expansion area with interval, and anchor rod extends downward from the bottom surface of second bearing platform and is arranged with inclination.The foundation structure has good bearing capacity and stability, can guarantee the safety and stability of wind turbine generator set in long-term operation process.

This utility model discloses a single-sided formwork reinforcement structure for ultra-high shafts, including a shaft, a cast-in-place pile at the bottom of the shaft, ground anchors on the outer side of the cast-in-place piles, masonry on the inner wall of the shaft, a ring beam on the masonry from bottom to top, wall anchor bars penetrating the surface of the masonry, and a water-stop bolt connected to the end of the wall anchor bar away from the inner wall of the shaft. One end of the water-stop bolt is longitudinally connected in series or extends to the wall anchor bar on the opposite side of the masonry. This utility model, through a composite anchoring system, improves the support of the single-sided formwork through the interaction of multiple anchoring system layers; simultaneously, combined with the ground anchor structure, it effectively distributes the lateral pressure evenly to the ground anchor bars, increasing the overall pull-out resistance by more than 40% compared to traditional ground anchors, and eliminating the need for through-wall bolts, thus avoiding future water seepage problems.

This utility model discloses a novel anchor bolt suitable for layered soft rock tunnels with different large deformation levels, relating to the field of soft rock tunnel support technology. It includes a first rod body, a second rod body, and an extension mechanism. The extension mechanism is disposed between the second rod body and the first rod body. The end of the first rod body is connected to an end cap, and a pad is disposed between the end cap and the first rod body. This utility model employs the aforementioned novel anchor bolt suitable for layered soft rock tunnels with different large deformation levels. The arrangement of the first and second rod bodies enhances the stability of the anchor bolt, resulting in more stable bonding anchoring force and higher pull-out resistance compared to simple metal anchor bolts, while also adapting to complex working conditions. The extension mechanism addresses the issue of easy deformation in soft rock, better utilizing the anchor bolt's support function. The material of the second rod body provides excellent adhesion and corrosion resistance, forming a high-strength anchoring interface, and its connection with the extension device enhances the stability of the device.

The utility model relates to the technical field of concrete square piles, and discloses an anti-compression and anti-pulling precast concrete square pile which comprises a concrete square pile body, a pile tip and an anti-pulling mechanism, the pile tip is fixedly arranged at the bottom end of the concrete square pile body, and the anti-pulling mechanism is fixedly arranged at the outer end of the concrete square pile body. An auxiliary mechanism is fixedly arranged at the inner end of the concrete square pile body; the anti-pulling mechanism comprises grooves, barb-shaped steel bars and anti-rust paint, the grooves are evenly formed in the outer end of the concrete square pile body, the barb-shaped steel bars are fixedly arranged on the side, close to the pile tip, of the outer end of the concrete square pile body, and the barb-shaped steel bars extend to the inner end of the concrete square pile body. According to the compression-resistant and pulling-resistant prefabricated concrete square pile, by arranging the pulling-resistant mechanism, the pulling-resistant performance of the concrete square pile is conveniently improved, the buoyancy of underground water is conveniently resisted, the anti-seismic effect is improved, normal use of a building is guaranteed, the use requirements of people are conveniently met, and the practicability is improved.

The invention relates to the technical field of side slope protection, in particular to a road side slope ecological protection structure which comprises positioning nails and a protection net and further comprises an anchoring mechanism arranged on the positioning nails and used for enhancing the anchoring stability of the positioning nails and side slope soil. The anchoring mechanism comprises a long shaft, the long shaft is fixed to the bottom of an inner cavity of the positioning nail, the top end of the long shaft penetrates through the top end face of the positioning nail, the outer surface of the long shaft is sleeved with a movable sleeve, a plurality of first sliding grooves are formed in the two sides of the movable sleeve, and fixing rings corresponding to the first sliding grooves in position are fixed to the inner wall of the positioning nail. An extrusion part is slidably connected between the first sliding groove and the fixing ring, a plurality of supporting parts are slidably connected to the interior of the positioning nail in the radial direction, a fixing plate is fixed to the bottom of each supporting part, and a barb type anchoring structure is formed when a nut is screwed, so that radial extrusion force is efficiently converted into embedding power of the positioning column; pressure concentration or insufficient thrust is avoided, and the pulling resistance is remarkably enhanced.

The utility model provides an LED lamp bead and a display module, and the LED lamp bead comprises a light-emitting chip, a connecting column, a lamp base and a wire. The external threads arranged on the side wall of the periphery of the connecting column of the LED lamp bead can be matched with the mounting holes, with the internal threads, of the substrate or other mounting carriers, and compared with traditional welding connection, the threaded connection structure can remarkably improve the bonding strength between the LED lamp bead and the substrate or other mounting carriers. When the LED lamp bead is subjected to external vibration or impact, the threaded connection structure can provide larger pulling resistance through the threaded connection matching effect so as to enhance the thrust of the LED lamp bead, the service life of the LED lamp bead is effectively prolonged, and the working stability of the LED lamp bead is effectively improved.

The application discloses a shear connector, a steel-concrete composite beam containing the shear connector and a construction method of the steel-concrete composite beam. The shear connector comprises an inverted truncated cone type cylinder (7), a stiffener, a cover plate, a penetrating steel bar (8) and a high-strength bolt (21); the stiffener comprises an integrally formed stiffener bottom plate (13) and a stiffener side plate (14), the size of the stiffener bottom plate is consistent with the size of the lower opening of the cylinder, and the stiffener bottom plate is attached to the lower opening of the cylinder; the stiffener bottom plate is provided with a second connecting hole for connecting the high-strength bolt; the stiffener side plate is arranged around the stiffener bottom plate and is attached to the inner wall of the cylinder; the height of the stiffener side plate is lower than that of the first connecting hole; the cover plate covers the upper opening of the cylinder; the penetrating steel bar transversely passes through the cylinder through the first connecting hole and leaves a connecting section on each side of the cylinder; and the high-strength bolt connects the stiffener bottom plate through the second connecting hole. The application realizes the disassembly and replacement of each component of the shear connector and the prefabricated bridge deck; and the structure form and stress performance of the shear connector are optimized.

The application discloses a pre-buried adjustable expansion depth expansion bolt assembly and belongs to the technical field of expansion bolts, which comprises a spring pad, a flat pad, a pre-buried sleeve, a hexagonal nut, an expansion sleeve, an expansion cone, an adjusting screw rod and a sealing end cover. In order to overcome the defects of the prior art, such as the damage to the concrete structure and the internal steel bars caused by the post-construction of the expansion bolt, the fixed and unadjustable expansion depth of the pre-buried anchor bolt, the jamming of the adjusting mechanism caused by the cement seepage due to the unreliable sealing of the plastic film during the pouring process, and the loosening of the anchoring force under long-term vibration, the application provides the pre-buried adjustable expansion depth expansion bolt assembly, so that the expansion depth of the expansion bolt on the market can be flexibly adjusted according to the actual wall thickness or the size of the decorative layer under the premise of pre-buried installation, the problems of the poor stability of the sealing end cover during the pouring process, the cement leakage caused by the poor stability of the sealing end cover, the single anchoring force between the expansion sleeve and the concrete and the insufficient long-term reliability of the expansion sleeve and the concrete are solved.

This utility model relates to the field of anchor bolt technology, and in particular to an anchor bolt structure for geotechnical construction, including an anchor bolt, a guide head, a sliding sleeve A, an anti-slip plate, and an elastic support assembly. The anchor bolt has a through hole coaxial with it, and several barbs A are provided on its outer wall. The guide head is connected to one end of the anchor bolt and has a grouting hole communicating with the through hole. The sliding sleeve A is fitted onto the anchor bolt, and several sets of connecting rods A are provided on the sliding sleeve A, with two connecting rods A in each set, and the two connecting rods A in the same set are parallel to each other. The anti-slip plate is rotatably connected to the ends of the two connecting rods A on the corresponding side away from the sliding sleeve A. The elastic support assembly is provided on the anchor bolt to expand each connecting rod A, thereby synchronously adjusting the distance between each anti-slip plate and the anchor bolt axis. This utility model improves the pull-out resistance of the anchor bolt and the stability of the connection between the anchor bolt and the geotechnical structure by relying on the anti-slip plate expanded by the elastic support assembly to abut against the inner wall of the rock borehole and by adding the barb structure.

The application discloses a kind of air-tightness detection devices for automobile engine fuel injection nozzle production, belong to fuel injection nozzle detection technical field, the air-tightness detection device for automobile engine fuel injection nozzle production of the present application, including pedestal, the pedestal is fixedly connected with a plurality of first fixed frame, the first fixed frame is fixedly connected with transparent test tube in, the pedestal upper end is fixedly connected with a plurality of fixed plate, the upper end of the pedestal is fixedly connected with wire plug-in mechanism, the fixed plate is provided with fuel injection nozzle fixing mechanism, fuel injection nozzle fixing mechanism and transparent test tube between being provided with the fuel injection nozzle to be measured, one side of the pedestal is fixedly connected with reflux pump, the reflux pump is fixedly connected with liquid storage tank at the end away from the pedestal.The present application is used by wire plug-in mechanism and fuel injection nozzle fixing mechanism, the process of fuel injection nozzle air-tightness test is greatly automated, greatly reduce the time required for test product fixation and wire connection, improve detection efficiency.

The utility model relates to the technical field of anti -floating anchor rod, concretely is a kind of fine rolled threaded steel anchor rod anchor head internal pressure installation structure, including threaded steel anchor rod main body, the middle part threaded connection of threaded steel anchor rod main body one end is equipped with locating nut, the one end of the locating nut is equipped with metal backing plate, the one end fixed mounting of metal backing plate has conical plug, the one end threaded connection of threaded steel anchor rod main body has end anchor head, the periphery of the lower end of the middle part of end anchor head is all equipped with split groove, the middle part of the lower end of end anchor head is equipped with conical slot, the one end of conical slot is equipped with abutting slot, the one end threaded connection of threaded steel anchor rod main body is equipped with limiting nut.The utility model has solved the traditional anchor head, such as mortar bonding type, shell type relies on grouting solidification or knocking extrusion and generates anchoring force, internal pressure forms hysteresis and cannot be actively adjusted, there are many problems in actual use.

The utility model relates to a suspended ceiling technical field especially suspended ceiling screw rod fixed pre -buried spare, including flat iron, the flat iron is welded with pre -buried pipe, and the pre -buried pipe is opened with the thread hole in, and the pre -buried pipe both sides symmetry welded have the anchoring rib, and the both ends and pre -buried pipe welded reinforcing rib board are inclined and welded on two anchoring ribs, and the anchoring claw is welded on two anchoring ribs, and the flat iron four corners are all set up fixed nail hole. The utility model through the fixed nail hole on the flat iron, adopt the nail or steel wire binding etc. mode, will the pre -buried spare whole fixed on the base beam, then carries out the concrete pouring, until the concrete and the flat iron flush, through the setting of anchoring rib, reinforcing rib board and anchoring claw, strengthen the overall pullout resistance of this pre -buried spare, compared with the fixed mode of later anchoring, avoided the high altitude electric hammer drilling in later period, existence security hidden danger, still easy to cause the dust pollution environment, and will destroy the problem of the integrity of concrete.

A kind of UHPFRC combined steel bridge deck panel using burl cold connection key, comprising the following construction steps: S1, prefabricated cold connection key;S2, using high-pressure air gun to carry out dust removal, cleaning to steel bridge deck top plate;S3, set cold connection key on steel bridge deck top plate, the longitudinal distance between adjacent cold connection key is 30-50cm, the transverse distance is 30-50cm;S4, pours the layer of ultra-high performance cement-based composite material on steel bridge deck top plate and cold connection key;The combined steel bridge deck panel of the application is simple in structure, and the force is clear, burl cold connection key is used in steel-mix combined structure, increases the contact area of connection key and concrete, can significantly reduce the stress concentration between connection key and concrete, while connection key has 360 degrees universal shear resistance, and shear resistance adaptability is good, and has good tensile performance, reliable connection and other advantages, is used with copolymerized formaldehyde fiber or hybrid fiber UHPFRC, can significantly improve the combined stiffness of combined structure, improves the fatigue performance of steel bridge deck panel.

The utility model discloses a main material insertion type stepped bearing platform rock anchor rod foundation structure, which relates to the technical field of power transmission line foundation engineering, and comprises an insertion type tower leg main material, an inclined upright post and stepped bearing platforms which are arranged in a graded manner along the terrain gradient direction, and the top of a bottom rock anchor rod is anchored in the stepped bearing platforms; the top of the lateral anchor rod is anchored on the inclined stand column, the lower portion of the lateral anchor rod is embedded in a bedrock layer through a bottom anchor rod anchoring body, the top of the lateral anchor rod is anchored on the inclined stand column, and the lower portion of the lateral anchor rod is embedded in the bedrock layer through a lateral anchor rod anchoring body. The excellent bearing performance of the bed rock is fully utilized, mountainous area slope topography is adapted to the maximum extent, the rock mass excavation depth and the earthwork volume are effectively reduced, the construction difficulty is reduced, and the construction efficiency is improved.

This invention discloses an outward-extending anti-buoyancy anchor construction device and an expanded-diameter high-pressure jet grouting anti-buoyancy pile, relating to the foundation field. The aim is to increase the maximum tensile force that the anti-buoyancy anchor can withstand and improve the pile quality of the anti-buoyancy pile. The technical solution adopted is as follows: The outward-extending anti-buoyancy anchor construction device includes a pile head, a casing, and anti-buoyancy reinforcement. The pile head is threadedly connected to the casing, and the anti-buoyancy reinforcement is located inside the casing. The lower end of the anti-buoyancy reinforcement is connected to the pile head. A flip-and-embed component is fixed to the outer periphery of the anti-buoyancy reinforcement, and the flip-and-embed component includes a fixed reinforcement and a movable reinforcement. The expanded-diameter high-pressure jet grouting anti-buoyancy pile includes a grouting consolidation body inside the pile hole and a jet grouting consolidation body outside the pile hole. The jet grouting consolidation body is a consolidation body formed by high-pressure jet grouting to the pile hole wall. The grouting consolidation body and the jet grouting consolidation body are a single unit. The movable reinforcement can be flipped and extended to embed into the jet grouting consolidation body corresponding to the soft strata, increasing the pile diameter and bearing capacity of the anti-buoyancy pile. This invention is used for the construction of anti-buoyancy piles.

The invention discloses an ecological slope protection supporting structure for hydraulic engineering, and relates to the technical field of hydraulic engineering, the ecological slope protection supporting structure comprises a concrete plate arranged at the top of a slope surface, the top and the bottom of the concrete plate are provided with an insertion hole and a resistance plate mounting groove respectively, and an auxiliary resistance plate is movably inserted into the inner wall of the resistance plate mounting groove; a bearing insertion hole is formed in the top of the slope surface, an insertion cylinder is movably inserted into the inner wall of the bearing insertion hole, and a positioning cylinder movably connected to the top of the insertion cylinder in a sleeving mode is fixedly connected to the center of the bottom of the auxiliary resistance plate. By rotating the single center adjusting column, the conical arc plate at the bottom can be synchronously driven to form a pile head, the transverse moving conical rod in the middle can be synchronously driven to penetrate in the radial direction, the anchoring arc rod on the upper portion can be synchronously driven to expand in the circumferential direction, and multi-layer and three-dimensional anchoring from deep to shallow and from the radial direction to the circumferential direction is achieved. Due to the synergistic effect, the overall anchoring force, pulling resistance and shearing resistance of the structure are greatly enhanced, and instability and landslide of the slope protection structure are effectively prevented.

The application provides a supporting structure for landslide emergency treatment and a use method, and belongs to the technical field of landslide emergency treatment. The supporting structure comprises an anchor rod, a connecting mechanism is arranged on the anchor rod, the connecting mechanism comprises hollowed-out discs one, two and three which are fixedly sleeved on the anchor rod, the diameters of the hollowed-out discs one, two and three are sequentially reduced, a plurality of connecting rings are fixedly sleeved on the anchor rod, and grooves are arranged on the anchor rod corresponding to the connecting rings. The hollowed-out discs one, two and three and the connecting rings are fixedly sleeved on the anchor rod, the contact area of the anchor rod and the grouting body is increased through the hollowed-out discs one, two and three and the connecting rings, the connecting strength of the anchor rod and the grouting body is improved, the pull-out resistance of the anchor rod is increased, and therefore the support of the side slope is more stable and reliable.

The utility model discloses a kind of photovoltaic panel installation prefabricated pile foundation, belong to photovoltaic panel installation technical field.A kind of photovoltaic panel installation prefabricated pile foundation, including steel column, outer sleeve pipe and embedded steel plate, the steel column lower end is equipped with ground anchor wing plate and conical ground anchor, conical ground anchor outer wall is equipped with threaded vane, the embedded steel plate lower surface fixed reinforcing bar, reinforcing bar is inserted with steel column, the outer sleeve pipe is sleeved in steel column outside, the inner wall of outer sleeve pipe is equipped with reinforcing anchor.The prefabricated steel column of the utility model is modularized assembly with outer sleeve pipe, without field welding, shortens construction period;Conical ground anchor and threaded vane realize fast driving, adapt to hard soil, frozen soil and other complex geology, concrete overflow from through hole form "rivet effect", enhance pile body pullout resistance;Cross-shaped reinforcing plate and staggered reinforcing anchor improve pile foundation bending performance;Spherical hinge block cooperates with adjusting screw rod, realize embedded steel plate inclination adjustment.

The utility model discloses a fixed point marking device for engineering survey, including marking rod, the marking rod bottom is provided with the ground fixed mechanism, the ground fixed mechanism includes fixed rod, chute, cone cover, push rod, plug rod and abutting block, and the fixed rod sets up at the marking rod bottom, be provided with quick -release mechanism between the fixed rod and marking rod, quick -release mechanism includes the joint sleeve, external cover, sliding block, clamping plate, card slot and limiting mechanism, through setting ground fixed mechanism, can realize marking rod fast, stably fixed in the ground in actual survey operation. The cooperation between chute and abutting block, push rod, plug rod makes the plug rod after inserting into the soil can form multi -point support structure, and the setting of quick -release mechanism makes marking rod and ground fixed part can realize quick connection and separation between, and the cooperation between sliding block, clamping plate and card slot ensures the firmness of the connecting process, and through the action of reset spring, can separate the locking structure rapidly in the dismounting process.

The utility model discloses a lattice formula concrete wind power tower column foundation, including a plurality of around wind power tower vertical center line circumferential uniform distribution's foundation structure, the foundation structure includes the foundation main part buried in the foundation and is used for and the wind power tower bottom tower column links the platform column, the platform column is located in the foundation main part, the outer wall of platform column and the inner wall of foundation main part are equipped with a plurality of first connecting plate, and the outer wall between adjacent foundation main part is equipped with the second connecting plate for realizing the connection of adjacent foundation main part. The utility model discloses a lattice formula concrete wind power tower column foundation has the advantages such as light self weight, simple structure, reasonable stress, high anti -pulling bearing capacity, good economy, convenient construction etc.

The utility model relates to the technical field of pile foundation engineering, and particularly discloses a device for improving the anti-pulling performance of a large-diameter non-soil-squeezing pipe pile, which comprises a pipe pile, a pile clamping device, a pile shoe, a pile bottom rock-socketed layer, a core drilling machine, a concrete pump truck, a water-bearing layer, a hard soil layer and a soft soil layer, a concrete conveying pump is installed at one end of the concrete pump truck, steel fiber concrete is injected into the upper surface of the pile bottom rock-embedded layer, and a vacuum pump is arranged outside the pipe pile. According to the device for improving the anti-pulling performance of the large-diameter non-soil-squeezing tubular pile, a circle of open reinforcement cage is arranged at the pile bottom, and the reinforcement cage and the pile bottom are connected into a whole after steel fiber reinforced concrete is used for sealing the bottom, so that the mechanical occlusal force and cohesive force between a pile body and pile bottom foundation soil can be enhanced, and the anti-pulling performance of the large-diameter non-soil-squeezing tubular pile is improved; the load is better transmitted to a deep solid rock stratum to improve the pulling resistance of the pile, and the pulling resistance of the pile is improved by discharging water around the pile in a water-bearing layer, lowering the underground water level and reducing the buoyancy force in a disguised mode.

This invention relates to a modular, assembled transmission tower foundation and its construction method. The transmission tower foundation includes four pile columns, a base, a bearing plate, a guide and locking mechanism, and a compression-type protective sleeve. The guide and locking mechanism is located between the bearing plate and the base, and achieves precise guidance and locking between modules through the insertion of connecting rods and connecting sleeves. The compression-type protective sleeve is slidably fitted onto the outer wall of the bearing plate and the base, and has a damping slip layer between it and the internal structure to withstand soil frost heave force and slide relative to it, thereby cutting off the transmission path of frost heave force to the main bearing structure. This invention solves the problems of difficult construction of traditional cast-in-place foundations in complex geological areas, foundation instability caused by frost heave force, and poor grounding. It features modular rapid assembly, strong frost heave resistance, and high structural stability, and is suitable for the construction of transmission line projects in complex geological areas.

The utility model relates to the field of uplift pile structure, specifically disclose a kind of uplift pile for power transmission and transformation engineering production, including uplift pile, steel structure column, side limiting piece;The opening is arranged on the top of uplift pile, and the pouring cavity is arranged inside the opening, the pile head is arranged on the bottom of uplift pile, and the pile head is conical structure, the side slot is arranged on the bottom of uplift pile side face, the side limiting piece is arranged in side slot, the bottom of pouring cavity in uplift pile is provided with the inclined plane of propulsion, the inclined plane of propulsion middle bottom position is provided with thread groove, the steel structure column is arranged in uplift pile, the reinforcing plug-in pile is arranged on the bottom of uplift pile, the pile ring is arranged on the reinforcing plug-in pile, and the pile ring is arranged in pouring cavity inside, the plug-in slot is arranged on the bottom of uplift pile;The uplift pile provided in the utility model for power transmission and transformation engineering production has very strong pullout effect, and the subsequent steel structure column and reinforcing plug-in pile are improved structural strength after the convenient installation of uplift pile.

The utility model provides an assembly type building prefabricated wallboard with an anti-seismic energy dissipation structure, and relates to the technical field of building prefabricated wallboards, the assembly type building prefabricated wallboard comprises a front wallboard main body, the rear end face of the front wallboard main body and the front end face of a rear wallboard main body are fixedly installed and connected through an adhesive, and at the moment, a rear containing groove and a front containing groove jointly form a sound absorption energy dissipation cavity; sound waves enter the sound absorption cavities with the interior being of a spherical structure, the incident sound waves are subjected to the total reflection effect through the inner circumferential arc faces of the spherical cavities, and sound energy is converted into heat energy to be consumed through multiple times of reflection attenuation of the sound waves in the cavities in combination with the friction of the wall faces of the cavities and the viscous effect of air media; a continuous acoustic conduction network is formed, after sound waves are reflected for multiple times in a single spherical cavity, part of energy enters the adjacent cavities through the sound conduction reflection holes, the cross-cavity linkage reflection energy consumption process is triggered, and the problem that the sound wave treatment capacity of a traditional prefabricated wallboard is limited, and the comprehensive requirement of a building cannot be met is solved.

The utility model relates to the technical field of steel pipe pile foundations, and discloses a steel pipe pile foundation reinforcing structure which comprises a steel pipe pile body, a conical head is arranged at the lower end of the steel pipe pile body, a reinforcing mechanism is arranged in the steel pipe pile body, and the anti-pulling effect of the steel pipe pile body can be improved through the reinforcing mechanism. The reinforcing mechanism comprises a top cover, a rotating rod and an extending assembly, the top cover is clamped to the upper end of the steel pipe pile body and fixedly connected through bolts, the rotating rod is rotatably mounted on the inner wall of the top cover and inserted into the steel pipe pile body, the extending assembly is arranged in the steel pipe pile body, and the reinforcing mechanism is arranged in the steel pipe pile. The counter-rotating rod rotates to drive the first toothed rods and the second toothed rods to extend out of the side wall of the steel pipe pile in a guiding mode and be inserted into soil or non-dried concrete, so that the stability of the steel pipe pile body mounted on a foundation is improved, and the anti-pulling effect of the steel pipe pile body is improved.

This invention discloses an expandable diameter reinforcement device and construction method for composite cement-soil mixing piles. The device includes a steel pipe pile, a sliding collar, multiple reinforcement units, a traction rope, and a traction guide. The sliding collar is fitted around the outer periphery of the steel pipe pile. Multiple reinforcement units are spaced apart around the pile end, with each reinforcement unit's two ends connected to the sliding collar and the pile end, respectively. The traction guide is located on the inner wall of the steel pipe pile, and the traction rope is connected to the sliding collar. When the traction rope is pulled upward, the sliding collar moves towards the pile end, reducing the distance between the two ends of each reinforcement unit and driving the multiple reinforcement units to bulge outward, forming an expanded diameter reinforcement structure around the pile end. This device effectively solves the problem of difficulty in lowering large-sized reinforcement components in limited construction channels. This construction method, by implanting and simultaneously expanding the diameter of the reinforcement components in a fluid-plastic pile body, is unaffected by subsequent hardening, ensuring controllable forming quality and ultimately improving the bearing capacity of the enlarged head region of the composite cement-soil mixing pile.

The invention discloses a new and old steel bar connecting mode suitable for replacing a bridge expansion device, and relates to the technical field of highway bridge maintenance. Comprising the following steps: S1, prefabricating a reinforcing steel bar lock catch in a factory; s2, chiseling away concrete in an anchoring area of the old telescopic device; s3, the old telescopic device is dismantled; s4, a new telescopic device is installed; s5, the old anchoring steel bars are connected with horizontal full-length steel bars preset in anchoring steel bar rings of the new telescopic device profile steel through steel bar lock catches; s6, concrete is poured into an anchoring area of the new telescopic device; and step S7, preserving. Rapid and reliable connection between a new telescopic device and an old anchoring steel bar is achieved through the steel bar lock catch, the defects of air pollution, original structure damage and the like of traditional steel bar planting and welding are overcome, the construction period is greatly shortened, the construction difficulty and cost are reduced, meanwhile, the connection firmness and construction safety are improved, and the replacement quality of the telescopic device is guaranteed.

The utility model relates to pipeline connection technical field, propose a kind of portable pipeline hot melt connection mobile device, including mounting seat, cooperative positioning assembly, fixed grounding assembly, folding arm assembly, pipeline moving assembly and support arm assembly, the utility model is fixed grounding assembly by being set, by the fixed screw rod of swing handle rotation makes conical rod drill into ground, device is fixed in ground, the fixed screw rod and conical rod of inclination can improve pullout resistance, avoid device activity when using, by setting folding arm assembly, folding rod rotates on first rotary seat, change pipeline moving assembly angle and pitch, adapt to different pipe diameter pipeline use, when transporting, folding rod is placed flat, it can reduce device occupied space, improve transportation efficiency, by setting support arm assembly, sleeve rod rotates on second rotary seat and changes angle, simultaneously by holding ring rotating adjusting screw rod and makes it elongation, lower connecting seat is close to upper connecting seat after by bolt connection, improve the stability of folding rod.

This utility model relates to an embedded steel-clad wood-concrete composite beam, belonging to the field of composite beam technology. It includes a concrete slab with a trapezoidal groove extending along its length at the bottom. A wooden beam is positioned below the concrete slab, and the wooden beam has trapezoidal protrusions that mate with the groove, inserted into the groove. Several shear pins are arranged along the length of the wooden beam, fixing it to the upper part. An outer steel beam with a rectangular cavity is positioned below the concrete slab, and the wooden beam is embedded within this cavity. Two sets of barbed bolts are provided on the concrete slab, located on opposite sides of the trapezoidal groove. This utility model utilizes the compressive strength of steel and the tensile strength of wood in synergy, achieving efficient connection through mortise and tenon joints, pins, and bolts, enhancing overall load-bearing capacity and stability. It is suitable for large spans and negative bending moment areas, possessing excellent assembly adaptability and durability.

The application relates to a pull tab and a zipper, the pull tab is used for the zipper, the zipper comprises a pull head and a pull rope, the pull tab comprises a main body and an opening and closing piece, the main body is used for being arranged on the pull head, the main body is provided with a first accommodating hole and a first opening communicated with the side wall of the first accommodating hole, and the opening and closing piece is arranged on the main body and can move relative to the main body to open or close the first opening; and the main body is further provided with a rope passing hole position used for passing the pull rope. In this way, the first accommodating hole can be used for accommodating an article to be hung, the first opening provides a channel for the article to enter or exit the first accommodating hole, the opening and closing piece controls the opening and closing of the first opening through movement, and the stable clamping of the article is realized; meanwhile, the rope passing hole position is used for passing the pull rope, the installation stability of the pull rope is ensured, the pull rope expands the article hanging function of the pull tab while facilitating the hand operation of the user, the pull tab has the functions of buckle hanging and stable rope passing at the same time, and the applicability and use convenience are improved.