274results about How to "Improve bearing capacity" patented technology

The invention discloses a power distribution network reconstruction optimization method for improving distributed new energy bearing capacity, and relates to the technical field of intelligent power distribution network optimization. The method comprises the following steps: constructing an evolution state path diagram for describing a system operation state space-time evolution rule based on historical and real-time operation data of a target power distribution network; identifying a plurality of potential weak moments when the bearing capacity margin of the system is lower than a dynamic safety threshold value in a future prediction time domain based on the prediction operation data of time-space association; analyzing relevance and time sequence proximity of the running states corresponding to the plurality of potential weak moments in the evolution state path diagram, and clustering to generate one or more demand time periods with internal state consistency; and for each demand period, determining a unique optimal network topology and a corresponding switch operation instruction, and integrating the instructions of each period to generate a multi-period reconstruction scheduling scheme. According to the invention, unnecessary switching operation times are reduced while the new energy consumption capability is ensured, and the reconstruction optimization effect of the power distribution network is improved.

The invention discloses a sectional type drainage combined pile and a consolidation calculation method, and relates to the technical field of soft soil foundation treatment.The sectional type drainage combined pile comprises a lower pile body, a pile core, a permeable shell and a plurality of pore water pressure monitoring components, the lower portion of the pile core is fixedly arranged in the lower pile body in a sleeved mode, and the permeable shell is fixedly arranged outside the upper portion of the pile core in a sleeved mode; the pile core and the lower pile body are both of a rigid structure and are waterproof, a plurality of pore water pressure monitoring components are sequentially embedded in one side of the water-permeable shell from top to bottom, and a plurality of pore water pressure monitoring components are sequentially embedded in one side of the lower pile body from top to bottom. According to the sectional type drainage combined pile, the foundation bearing capacity and the consolidation rate are improved. Meanwhile, a consolidation calculation method considering radial and vertical seepage of the sectional type drainage composite pile is established, the consolidation calculation method is suitable for consolidation analysis of the sectional type drainage composite pile, and an accurate theoretical basis is provided for engineering design.

The utility model relates to the field of maintenance frame discloses a maintenance frame for lifting type industrial robot, including base, the top of base is provided with lifting assembly, the top fixed connection of lifting assembly has fixed platform, both sides of fixed platform all are fixedly connected with two connecting frames, the left side fixed connection of connecting frame has support frame, the bottom rotatory connection of support frame has support rod, the other end rotatory connection of support rod has support screw rod, the other end fixed connection of support screw rod has driven rod, the middle rotatory connection of driven rod has fulcrum rod, the side fixed connection of driven rod has adjusting rod. In the utility model, enhance platform stability, this design operation is simple, compact structure, can fixedly spread of extension board fast, is applicable to industrial maintenance scene etc, has the advantages such as smooth unfolding, locking reliable, strong bearing capacity, effectively promotes work efficiency and security.

The utility model discloses a ribbed hollow square pile which comprises a square pile body, a through hole penetrates through the center of the square pile body, plane portions are arranged on the four outer side faces of the square pile body, and the two radial sides of each plane portion are connected with first protruding portions which extend and protrude outwards. The side, away from the through hole, of the first protruding part is connected with a second protruding part parallel to the plane part, the intersecting edge of every two adjacent second protruding parts forms a sharp corner part, the two axial ends of the square pile body are further provided with end structures, the pile surface area is increased by adjusting the shape of the hollow square pile, and the hollow square pile is more compact. Meanwhile, compared with an existing X-shaped pile, the structure with the parallel rib edges is convenient to stack, the soil squeezing effect is reduced compared with a hollow square pile with the same bearing capacity, and compared with a common square pile, the material consumption of the same surface area is lower.

A new type of oil cavity recess type static and dynamic pressure thrust bearing, with the development of high speed heavy load cutting technology, heavy equipment gradually to high speed heavy load development, we are more and more high performance requirements of static pressure thrust bearing, but with the increase of speed and load, the lubricating oil film because of the action of shear force and extrusion force, shear heat increases, oil film thin, even in local tribology failure phenomenon, and bearing because of local overheating deformation, resulting in lubricating oil leakage, and lubricating oil viscosity decreases, will produce static pressure loss, therefore, the patent puts forward a new type of oil cavity recess type static and dynamic pressure thrust bearing, so that the static pressure thrust bearing work, oil cavity and rotary workbench guide surface between the total wedge gap, under the condition of rotary workbench high speed rotation, meet the conditions of dynamic pressure effect, use dynamic pressure effect, through the dynamic pressure to make up for the lack of static pressure bearing capacity, in order to achieve the purpose of improving the bearing capacity and stability.

The utility model provides a quick locknut for a tire balancing machine and a tire changer, which comprises a cylinder base body, handles, a split nut block and a first spring, the handles are arranged on two sides of the cylinder base body, the split nut block and the first spring are arranged in the cylinder base body, a round pin and a pan head bolt are arranged above the split nut block, and the first spring is arranged above the round pin. The air cylinder base body is installed on the lead screw, and threads matched with each other are arranged on the surface of the lead screw and the surface of the split nut block. The product weight is light; the quality is good; the bearing capacity is large, a tire changer and a tire balancing machine can be universally used, and the variety of materials is greatly reduced; the quick locking nut is applied to a tire dismounting machine, the cone is additionally arranged at the bottom, the quick positioning and locking effect can be achieved, the quick locking nut can be applied to other industries due to large bearing capacity and looseness prevention, and the application range is greatly widened.

The utility model discloses a roller pin spinning roller structure, which comprises a spinning roller shaft, the spinning roller is arranged on the spinning roller shaft in a sleeving manner; the rolling needles are arranged between the rotating wheel shaft and the rotating wheel, and the rolling needles are sequentially arranged along the periphery of the rotating wheel shaft; the glands are pressed at the two ends of the spinning roller; and the needle bearing is arranged between the gland and the spinning roller. The rolling needle spinning roller structure is simple in structure and reasonable and compact in design, the bearing capacity of the spinning roller structure can be effectively improved, the size of the spinning roller can be effectively reduced under the condition of the same bearing capacity, the service life of the spinning roller can be effectively prolonged, and therefore cost can be effectively saved.

This utility model provides a foldable flue transport vehicle, relating to the field of construction technology. It includes a support frame, inside which are arranged a set of solid shafts (set one and set two). Limiting plates are respectively installed on one side of each of the solid shafts. A reinforcing bar connecting ring is fitted onto the solid shaft, with a seamless steel pipe welded to one end of the first connecting ring. Similarly, a reinforcing bar connecting ring is fitted onto the solid shaft, with a seamless steel pipe welded to one end of the second connecting ring. After use, gently pushing the load-bearing horizontal plate inward causes the reinforcing bar connecting rings to deform as the frame rotates, bringing the two frames closer together to achieve a folded state. After folding, the volume is reduced to 1 / 3 to 1 / 2 of the original volume, facilitating on-site transport and storage.

This utility model discloses a toothbrush head, including a bristle-planting head, a support assembly, and a handle. A power unit is disposed within the handle and connected to the bristle-planting head. The power unit controls the rotation of the bristle-planting head within the support assembly. The bristle-planting head includes a bristle-planting section, a drive shaft, and a driven section. One end of the drive shaft is fixedly connected to the bristle-planting section, and the other end is fixedly connected to the driven section. The driven section includes a driven rotating component, and the power unit includes a main rotating component. Both the driven and main rotating components have bevel gear structures and are meshed together to transmit power from the power unit to the driven section via bevel gear transmission. The support assembly has a notch for the drive shaft to pass through, allowing the drive shaft to engage and rotate within the support assembly. The first end face of the support assembly abuts against the bristle-planting section, and the second end face abuts against the driven section. The support assembly is fixedly connected to one end of the handle. This design offers advantages such as simple assembly structure, high transmission efficiency, and low noise.

The utility model discloses a suspended type floor guardrail which comprises a cap, a metal gasket, a rubber gasket, a metal end, a chemical bolt and a flexible cross rod, the lower portion of the chemical bolt is fixed with embedded steel bar glue, and the upper end of the chemical bolt is fixed with the bottom of the metal end through the rubber gasket, the metal gasket and a nut in sequence. A flexible transverse rod is connected between the inner sides of the upper ends of the metal ends, and caps are arranged on the tops of the metal ends. Sundry accumulation is avoided through the design of the ground clearance cross rod, efficient buffering is achieved by combining the flexible material and the elastic supporting structure, and the device is suitable for area division and anti-collision requirements of workshops, warehouses and the like and has the advantages of being convenient to install and low in maintenance cost.

The application provides a high-strength and high-ductility steel pipe concrete column, which comprises a rectangular outer steel pipe and arc-shaped inner steel plates connected to each steel pipe surface on the inner side of the rectangular outer steel pipe, the arc-shaped inner steel plates and the steel pipe surfaces on the inner side of the rectangular outer steel pipe form four closed and non-intersecting cavities, the core area is outside the cavities in the rectangular outer steel pipe, and the core area is filled with concrete; the arc-shaped inner steel plates provide a constraint similar to a round steel pipe on the core of the concrete column, so that the concrete in all areas inside the outer steel pipe can be well constrained, meanwhile, the arc-shaped inner steel plates provide a supporting action for the outer steel pipe, effectively delay the local buckling deformation of the rectangular outer steel pipe, and the steel pipe concrete column component has high strength and good ductility.

This utility model provides a machine tool body and a machine tool. The machine tool body includes a base, a column mounted on the base, a crossbeam mounted on the column, a slide block slidably fitted onto the front side of the crossbeam, a rolling guide rail pair, and a sliding guide rail pair. The slide block includes a seat body, a first connecting body connected to the top of the seat body, and a second connecting body connected to the bottom of the seat body. The first connecting body and the second connecting body are slidably connected to the crossbeam via the rolling guide rail pair, and the side of the seat body is slidably connected to the side of the crossbeam via the sliding guide rail pair. The machine tool body provided by this utility model can improve the load-bearing capacity between the slide block and the crossbeam.

The invention relates to the technical field of building construction, in particular to a bottom-expanded rotor steel pipe pile and a construction technology thereof.The bottom-expanded rotor steel pipe pile comprises a pile body steel pipe, a bottom-expanded wing ring and a pile top grouting blind plate, one end of the pile top grouting blind plate is a connector end, and the connector end is connected with the power end of a drilling machine; the rotary cutting is performed through the bottom-expanded wing ring; an injection cavity is formed in the pile body steel pipe. According to the bottom-expanded rotor steel pipe pile, the large bearing capacity can be provided under the small diameter. The steel pipe pile can form a larger bearing area in soil, so that the bearing capacity of a single pile is remarkably improved, and the steel pipe pile is suitable for various types of soil and rocks including soft soil, sandy soil, cohesive soil, soft rocks and the like. The rotary cutting mode is adopted for burying, the construction process is relatively simple and rapid, and the construction efficiency can be remarkably improved. And meanwhile, a large amount of slurry treatment and dumping operation are not needed, so that the construction time and cost are further saved.

This utility model discloses a steel box-type truss that is easy to assemble and connect, including crossbars symmetrically distributed at four corners and a first hollow plate welded to the inner side of the middle of the crossbars; it also includes: a second hollow plate and a third hollow plate fixedly connected to the outer sides of the front and rear ends of the crossbars respectively, and a definable docking structure provided between the second hollow plate and the third hollow plate; a first reinforcing rib fixedly connected to the first hollow plate and fitted to the outside of the crossbar, and the first reinforcing ribs are evenly distributed within the first hollow plate; a receiving plate fixedly welded to the crossbars is provided on both the front and rear sides of the first hollow plate, and a second reinforcing rib fixedly connected to the receiving plate and fitted to the crossbar, and both the receiving plate and the second reinforcing rib have an "X" shaped structure. This steel box-type truss that is easy to assemble and connect facilitates high load-bearing capacity, prevents detachment, and allows for rapid assembly and docking of the steel box-type truss.

The present application relates to anti-slide pile reinforcing technical field, specifically relates to a kind of large-size rectangular broken anti-slide pile reinforcing structure of operating railway line.A kind of "concave" anti-slide pile repair structure of broken pile, including prefabricated steel guard wall, formwork support, embedded part, shear I-beam, steel reinforcement framework, the present application provides a kind of large-size rectangular broken anti-slide pile reinforcing structure with simple structure, convenient construction, good effect, after the stability discrimination safety of potential sliding surface, excavate a "concave" section pile hole in defect pile body and make steel guard wall, "concave" pile inlay shear I-beam and once cast concrete forming, form the inner package of defect pile body, under the premise of guaranteeing normal operation of railway line, realize defect pile reinforcing, prevent pile body defect continue to deteriorate, eliminate landslide instability hidden danger.

The invention relates to the technical field of construction engineering foundation treatment, in particular to a foundation structure based on a high-saturation brine crystallization technology and a construction method of the foundation structure. The foundation structure comprises a basic primary salt rock bearing layer, a bottom framework cementing layer and a surface sand gravel compensation layer. As the magmatic rocks are very hard, high in density and enough in salt lake chemical environment resistance, the magmatic rocks are directly put into a hypersalinity brine area to form a rigid framework, framework building-in, gap filling and overall cementing are achieved through natural crystallization of salt lake hypersalinity brine, and a core rigid framework of the foundation is formed; the structure can be connected with a primary salt rock bearing layer of a lower foundation to form a stress transmission system, can resist soaking erosion caused by conventional fluctuation of the brine water level, has anti-floating and anti-seepage dual performance, can improve the foundation bearing capacity and the anti-settling capacity, and enables a building newly built on a salt lake to be more stable. Meanwhile, the magmatic rocks are natural materials, so that the salt lake environment is not polluted, and the environmental protection property is good.

The utility model discloses a low-energy-consumption door leaf framing structure, which belongs to the technical field of door leaf framing, and comprises a light opening, a transverse frame, a framing corner brace and a framing clamping plate, the framing corner brace comprises an outer frame and a reinforcing rib, the outer side of the framing corner brace is provided with two first through holes, and the outer side of the framing corner brace is provided with two second through holes. And the two first through holes are internally provided with anti-skid retaining bolts, spring washers are arranged between the anti-skid retaining bolts and the framing corner connector, two first threaded holes are formed in the outer side of the framing clamping plate, and a through glue groove is formed in the side, close to the optical opener, of the framing corner connector. The utility model solves the problem that the heat insulation performance is influenced by the quality problems that the splicing position is not flat, warped and the like when used on a large-specification unit door, cracks occur at the splicing position in the using process, water seepage occurs in a corner cavity, the integral attractiveness of a door and a window is influenced, leakage occurs and the like.

The present application relates to soft ground treatment technical field, specifically to a kind of based on non-uniform soft foundation pressurized vacuum preloading device and layout method, preloading device includes: pressurized pipe body, can be connected in series;Connecting pipe body is spaced in the pressurized pipe body, side wall and the side wall of pressurized pipe body are enclosed into pressurized cavity, and the side wall of pressurized cavity is provided with multiple exhaust holes;Pressure regulating mechanism is connected between the inner cavity of connecting pipe body and pressurized cavity, and the size of the on-off and effective communication area of communication passage between the inner cavity of connecting pipe body and pressurized cavity can be adjusted;Wherein, in the case where two pressurized pipe bodies are connected, corresponding two connecting pipe bodies are connected, can be according to the permeability coefficient and consolidation characteristics of different depth soil layer, specifically adjust pressurized pressure, to improve reinforcement effect, improve construction efficiency.The preloading method is based on the preloading device described above.

The utility model relates to a dental drill device, a voltage regulator for a dental drill and a pneumatic switch of the voltage regulator. The pneumatic switch comprises a pneumatic valve and an infrared correlation sensor. The pneumatic valve and the infrared correlation sensor can be arranged on the pressure regulator body. A valve body of the pneumatic valve is connected with a high-pressure air source, and a telescopic push rod is arranged on the valve body. The push rod and the infrared correlation sensor are oppositely arranged, the infrared correlation sensor is provided with a transmitting end and a receiving end, and an infrared light path is formed between the transmitting end and the receiving end. When the push rod is driven by high-pressure gas output by the high-pressure gas source to be in an extension state, the push rod shields the infrared light path, and the pneumatic switch is turned on. When the push rod resets and is in a shortened state, the push rod is separated from the infrared light path, and the pneumatic switch is turned off. The pneumatic valve has the beneficial effects that the solid structural part pneumatic valve made of hard materials is adopted for bearing driving force of high-pressure gas, and the pneumatic valve is high in bearing capacity, not prone to being damaged and long in service life.

This invention belongs to the field of grouting reinforcement technology for fractured surrounding rock, and discloses a directional grouting reinforcement method for fractured surrounding rock around a tunnel. This method aims to solve the problems of large grouting volume, long construction period and high cost caused by the existing grouting methods used for fractured surrounding rock in tunnels. The invention includes: (1) drilling holes into the fractured surrounding rock around the tunnel; (2) inserting grouting pipes into each hole, wherein at least three rows of grouting ports are provided along the length of the grouting pipe, and each row of grouting ports contains multiple grouting ports. The included angle between the two outermost rows of grouting ports on the grouting pipe is 100°-135°, and the grout sprayed from the two adjacent rows of grouting ports on two adjacent grouting pipes in the fractured surrounding rock around the tunnel can form an overlapping area; (3) injecting grout into the grouting pipe, and the grout sprayed from each grouting port of the grouting pipe into the gaps of the fractured surrounding rock to complete the grouting reinforcement of the fractured surrounding rock.

The utility model discloses an anti-landslide road slope reinforcing device which comprises a plurality of splicing type prefabricated slope protection components arranged on a slope, a plurality of through holes are formed in the side edges of the prefabricated slope protection components, and the adjacent prefabricated slope protection components are connected together through connecting pieces penetrating into the through holes to form an integral slope protection structure. A first anti-slide pile is arranged at the top of the side slope, a base is fixedly connected to the toe of the side slope through a second anti-slide pile, the top of the integral slope protection structure is connected with the first anti-slide pile through an extension section of a connecting piece, and the bottom of the integral slope protection structure is connected with the base in a buckled mode. The structure is simple, construction is convenient and efficient, bearing capacity and long-term durability are good, construction quality is easy to control, and a good anti-sliding slope protection effect is achieved.

The utility model relates to the field of building construction, in particular to a concrete beam heightening device which comprises a reinforcing device, a concrete beam and a forming die, section-enlarged concrete is arranged in the forming die, and the lower end of the concrete beam is inserted into the forming die and connected with the section-enlarged concrete. The reinforcing device comprises a first supporting piece, a second supporting piece, a first connecting piece, a second connecting piece and an angle steel cross beam, the upper end of the first supporting piece and the upper end of the second supporting piece are fixedly connected with the two sides of the concrete beam correspondingly, and the lower end of the first supporting piece is fixedly connected with the upper end of the first connecting piece; the lower end of the second supporting piece is fixedly connected with the upper end of the second connecting piece, the lower end of the first connecting piece and the lower end of the second connecting piece are in threaded connection with the two ends of the angle steel beam respectively, and a wood brace is arranged between the angle steel beam and the forming die. The cross-section-enlarged concrete is additionally arranged at the lower end of the concrete beam through the forming die, the overall height of the beam is increased through reinforcing of the reinforcing device, and the bearing capacity is improved.

The application discloses a large-span prestressed steel structure energy dissipation and vibration reduction self-resetting cable device, which comprises a baffle arranged on the left and right sides, a cable penetrating through the baffles, a cushion block and an anchor for anchoring the cable, a steel pull rod penetrating through the left and right baffles in sequence, a cushion plate welded at the two ends of the steel pull rod, a steel strand penetrating through the center of the steel pull rod, a second anchor for anchoring the steel strand, a spiral spring nested outside the steel pull rod and welded at the inner sides of the left and right baffles at the two ends, respectively, an upper dislocation plate welded at the inner side of the left baffle, a lower dislocation plate welded at the inner side of the right baffle, an energy dissipation device penetrating through upper and lower strip-shaped bolt holes in sequence, wherein the energy dissipation device comprises a screw rod, upper and lower nuts and upper and lower friction gaskets, and further comprises a friction energy dissipation block embedded between the upper and lower dislocation plates and a stopper for preventing the friction energy dissipation block from falling off; the device can realize energy dissipation and vibration reduction through the tensile and compressive deformation of the spiral spring and the relative sliding of the upper and lower dislocation plates, and can realize the self-resetting function through the steel strand in the steel pull rod and the spiral spring.

The utility model provides an explosion-proof type large motor bearing mechanism, and relates to the field of explosion-proof type large motor bearing carrying capacity structures, the explosion-proof type large motor bearing mechanism comprises end covers, an inner cover, an outer cover, a ball bearing, a ball bearing and a shaft, the end covers are fixed at two ends of a motor stator, the ball bearing and the ball bearing are installed on the shaft in a matched mode, and the inner cover is fixed on the outer cover. The inner cover is assembled on the inner side of the ball bearing, and the outer cover is assembled on the outer side of the ball bearing. According to the utility model, the problem of poor bearing capacity of a large-scale ball bearing can be solved by selecting a mode of simultaneously placing two bearings, one ball bearing and another ball bearing on one side of the motor, the axial direction of the ball bearing can prevent the motor from tilting and the axial movement of the rotor, and the ball bearing can effectively solve the problem of radial force of the motor; narrow-series bearings are selected as the ball bearing and the ball bearing respectively, the two sets of shafts are used together in a matched mode, the reliability, the size and the price are all lower than those of a large ball bearing, and therefore the bearing capacity of the explosion-proof type large motor bearing can be smoothly improved.

The utility model provides a kind of cantilever beam support structure, it is related to cantilever beam technical field, comprising: inclined column, it is set to the side of support surface, and by lower to upper gradually away from support surface;Multiple crossbeam, each the crossbeam is spaced apart between inclined column and the support surface by lower to upper setting.The utility model has beneficial effect: the particularity of cleverly using the large-angle extension of inclined column is achieved by setting inclined column, by the inside steel beam, four inclined braces, and relevant node strengthening method of design, so that it forms a complete structure system, under the premise of guaranteeing its safety, the cantilever span of cantilever beam can be greatly increased, the room function and building design aesthetic type of existing building industry are increased;The bearing capacity and deformation capacity of entire structure system can be greatly increased by setting shaped steel in concrete beam in the structure device, the problems of large amount of engineering material, large cantilever structure, high cost, cantilever beam easy cracking deformation and other problems can be effectively solved.

The present application relates to the technical field of net rack structure reinforcement, and particularly relates to a welding-free full-assembled net rack rod piece reinforcement device and method. The device comprises: a fixed center bearing frame for reinforcing a circular tube component; a telescopic vertical sliding inclined strut assembly arranged between two adjacent vertical fixed vertical rods; an assembled sectional sleeve assembly for fixing the fixed center bearing frame outside the circular tube component; a cable body for connecting two connecting bases on the fixed center bearing frame; and a tensioning adjusting mechanism for adjusting the tension of the cable body. The welding-free full-assembled net rack rod piece reinforcement device and method provided by the present application adopts a welding-free full-assembled construction process, and the components are standardized prefabricated in a factory. The components are only assembled by bolts and pins at the site, so that the construction is safe and efficient, welding damage is avoided, and the original structure performance is not affected. The components are connected by bolts, so that the components are convenient to disassemble and assemble, the components can be recycled and reused, and the engineering cost is reduced.

This utility model relates to a folding bracket and a folding chair, including a crossbar assembly and two symmetrically arranged folding components. Each folding component includes a fixed base, at least two support legs, and at least two support rods. The fixed base is connected to the crossbar assembly, and the support legs and support rods are hinged to the fixed base. Each support leg and support rod is fitted with a limiting sleeve. The fixed base has an outwardly extending positioning element, which is fixedly connected to the fixed base. In the unfolded state, the limiting sleeve is fitted onto the positioning element. The folding bracket and folding chair obtained by this utility model have the following advantages: the limiting sleeve is used to fix the positioning element to the support leg or support rod. The limiting sleeve only needs to simultaneously wrap around the support leg and positioning element, as well as the support rod and positioning element, thus both restricting the rotation of the support leg and support rod after unfolding and improving the overall structural strength and load-bearing capacity in the unfolded state. When folding, simply pull out the limiting sleeve from the positioning element, and the support leg and support rod can be folded inward.

The utility model discloses a pump station high-bearing-capacity foundation structure, and belongs to the technical field of pump station foundations, the pump station high-bearing-capacity foundation structure comprises a concrete layer, a ground and prestressed pipe piles, the ground is located on the surface of the concrete layer, a plurality of prestressed pipe piles are pre-buried in the concrete layer, and each prestressed pipe pile comprises a first pipe pile section, a second pipe pile section and a welding point; each first section of pipe pile and each second section of pipe pile are welded through a welding point; the design is novel, the device is ingenious, the prestressed pipe pile foundation is arranged, due to the fact that a current pump station foundation soil is low in bearing capacity and cannot meet the design requirement, the prestressed pipe pile foundation needs to be adopted for treatment so as to improve the bearing capacity of the foundation soil, and the prestressed pipe pile foundation technology is an effective foundation treatment method; and the foundation bearing capacity can be improved, settlement is reduced, the structural stability is improved, important practical significance is achieved through research and development of the technology for improving the foundation soil bearing capacity of the prestressed pipe pile foundation, and the practicability of the device is greatly improved.

The utility model belongs to the technical field of building construction, and particularly relates to a double-layer reinforcement cage with a positioning function, which comprises a framework steel bar, and a reinforcing mechanism is welded on the side wall of the framework steel bar. The outer-ring stirrups and the inner-ring stirrups can enhance the punching resistance of the pile top and restrain the core concrete to improve the bearing capacity of a pile body, the double-layer stirrups act synergistically to resist water and soil pressure, local loads can be evenly dispersed to an overall framework, the anti-seismic and anti-impact capacity is improved, meanwhile, the core concrete is restrained by the inner ring, and the outer-layer concrete is restrained by the outer ring; the gradient constraint effect is formed, crack development is delayed, ductility is improved, the top fixing ribs can make the structure of the reinforcement cage more stable, and meanwhile a platform can be provided for follow-up equipment installation.

The application discloses a kind of based on multiple-source solid waste's improved red sandstone roadbed filler and mix proportion optimization method, belong to the field of red sandstone filler green low carbon improvement.Improved red sandstone roadbed filler is red sandstone as improved matrix, with match calcium carbide slag, rice husk ash, fly ash as cementing component preparation, wherein calcium carbide slag provides calcium source and alkaline environment, rice husk ash provides silicon source, fly ash provides aluminum source, three reactions occur in alkaline environment and generate abundant cementing products, realize red sandstone improvement.At the same time, with three cementing component contents as design variable, with bearing ratio, unconfined compressive strength, water stability coefficient as road evaluation index, construct road performance response model, through multi-index optimization, clear cementing component optimization ratio range.The method can exert the synergistic effect of multiple-source solid waste chemical composition, can be optimized according to different application scene performance requirements Ratio, realize red sandstone efficient improvement and multiple-source solid waste high-value utilization, with economic benefit and environmental benefit.