32results about How to "Reliable carrying capacity" patented technology

The present invention relates to high-pressure rotary spraying and core inserting process to form pedestal pipe. The pedestal pile consists of core pile, column and pile depestal. The cylindrical or turned frustum-shaped core pile may be prefabricated reinforced concrete pile, in-situ deposited pile or other pile in different cross section shapes. The pile pedestal below the core pile has diameter greater than that of the core pile. The column has circular, semi-circular of fan-shaped cross section. There may be several auxiliary core piles around the main solid or hollow core pile and several rings in relatively great diameter around the column. The present invention has reasonable design, compact structure, high friction resistance, and wide application in building engineering, bridge engineering, civil engineering, water engineering, etc.

The invention discloses a construction method for a cast-in-situ bored pile. The construction method comprises the following steps: S1, carrying out digging by a drilling machine: processing the surface of a basic layer of a drilling site, and trepanning the basic layer after rechecking a pile position; S2, laying down pile casings by a vibratory hammer: connecting the pile casings by using high strength bolts and nuts; S3, drilling a hole by the drilling machine: after the pile casings arrive a preset depth, carrying out drilling to a designed pile bottom elevation for first time hole cleaning; S4, laying down a reinforcement cage and pouring concrete, carrying out pouring continuously, and overpouring concrete for 1-2 m; and S5, pulling out the pile casings by the vibratory hammer: pulling out the pile casings from pile holes after pouring the concrete, and recycling the pile casings. The method is free of pollution to underground water and tidy in construction site, does not affectthe ambient environment, and meets the high environmental-friendly demand. Compared with a conventional process, the construction speed of the method is over doubled, so that the construction efficiency is high.

The invention provides a vibro-replacement stone pile and rockfill reinforced earth and rockfill dam soft foundation treatment structure and a construction method. The construction method comprises the steps that a vibro-replacement stone pile group is arranged on a soft covering layer to reinforce a deep soft foundation of a dam foundation; the bottom of the stone pile is located on a covering layer compact layer or weathered bed rock; an earth and rockfill dam anti-seepage system is composed of a covering layer foundation anti-seepage wall and a dam body anti-seepage body; a foundation inverted filter cushion layer is arranged at the top of the stone pile on the downstream side of the anti-seepage wall; and a dam shell rockfill body reinforced area is filled at the upper part of an upstream side stone pile and the upper part of a downstream side foundation inverted filter cushion layer of the anti-seepage wall, so that the deformation modulus of a dam material at the lower part of adam shell is improved, the settlement deformation of a dam body caused by a weak foundation is homogenized, and dam body cracking caused by differential settlement is avoided. For deep and thick weakfoundation conditions, through reasonable treatment measures and methods combining weak foundation reinforcement and dam body structure reinforcement, foundation strength, bearing capacity and deformation control meet the dam building requirement, and the important significance is achieved for an earth and rockfill dam engineering damming technology under complex conditions.

The invention discloses a pile-forming device and pile-forming method for control modulus pile, belonging to the field of bearing characteristic testing of composite foundation of geotechnical engineering. The device of the invention is composed of a drill bit, a motor, a control platform, a drill frame, a drilling rod, a driving chain, a slurry transporting pipe, a pressure pump, and a model box. The method of the invention includes the steps of filling simulation soil layer, preparing cement slurry, and forming pile. The invention realizes the quantitative design of control deform and control bearing force of the composite foundation, and fully mobilizes the function of the soil among piles by adjusting the stress ratio of the pile soil.

The invention discloses a piston diameter changeable air spring. The piston diameter changeable air spring comprises a cover plate, a rubber air bag and a piston assembly. The rubber air bag is pressed and assembled to a lower port of the cover plate, and a lower port of the rubber air bag is pressed and assembled to the piston assembly. The piston assembly comprises a hollow columnar piston framework, a piston ejector rod arranged at the bottom of the piston framework in a sliding fit manner, and a plurality of piston sections evenly and movably hinged to the circumferential wall of the piston framework in the circumferential direction. The piston ejector rod and the middle portion of each piston section are movably hinged through a connecting rod, and a plurality of slider-crank mechanisms are formed. According to the piston diameter changeable air spring, an actuating mechanism can be used for changing the position of the piston ejector rod in the piston assembly to expand the piston sections, accordingly, the diameter of the piston and the effective diameter of the air spring are adjusted, and through combined action with a car body height adjusting mechanism, the bearing rigidity of the air spring can be changed under the situation that the bearing weight is not changed.

The invention discloses pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment in the technical field of building construction. The pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment comprises a drill rod driven by an external power device to rotate, wherein the lower end of the drill rod is coaxially and fixedly connected with a mounting rod; the lower end of the mounting rod is provided with a spiral blade; the spiral blade is driven by a driving unit to radially stretch out and draw back along the mounting rod, so that the adjustment of the hole diameter of a drilling hole is realized; a through groove communicated with the interior of the drill rod is formed in the outer wall of the lower end of the drill rod; a water filling unit and a slurry discharging unit are arranged in the drill rod; the water filling unit is used for filling water into the drill hole; and the slurry discharging unit is used for discharging slurry in the drill hole. The pipe pile variable-diameter hole guiding and pile pressing synchronous construction equipment and method thereof provided by the invention have the beneficial effects that hole guiding and pile pressing can be synchronously carried out, the soil squeezing effect of the pipe pile is controllable, the characteristics of reliable bearing capacity after pile forming and the like are achieved, static pressure of soft soil layers, hard soil layers and soft and hard interbedding areas or construction of variable-diameter hole guiding needed by hammering the pipe pile can be completed, and compared with a traditional construction method, the method has the characteristics that the construction efficiency is high, the soil squeezing effect of the pipe pile is controllable, and the bearing capacity is reliable after pile forming.

The invention discloses a composite floor slab construction method based on aluminum alloy formwork support. The composite floor slab construction method comprises the following construction steps that S1, construction preparation is achieved: formwork matching design of an aluminum alloy formwork support system is completed; S2, the aluminum alloy formwork support system is installed; S3, composite floor slabs are hoisted, specifically, the composite floor slabs are arranged at the top of the aluminum alloy formwork support system in a hoisting mode and supported by aluminum alloy formworks and keel fixed tops, and the composite floor slabs are connected through reserved steel bars on the composite floor slabs bonded by steel bars; S4, concrete pouring is conducted, specifically, concrete is poured to the position above a composite floor slab; and S5, an aluminum formwork keel support system is dismantled and turned over, specifically, after concrete curing is achieved, an aluminum alloy formwork support system structure except aluminum formwork fixed tops is dismantled, and turning over is conducted. According to the composite floor slab construction method based on the aluminum alloy formwork support, the composite floor slab is supported through aluminum formwork keels and the aluminum formwork fixed tops, when a plurality of aluminum formwork fixed tops exist, all the aluminum formwork keels are connected through the aluminum alloy formworks, horizontal stability is guaranteed, and overturning is prevented in the hoisting process.

The invention discloses a bidirectional shearing metal damper. The bidirectional shearing metal damper comprises two end plates which are oppositely arranged up and down, wherein a transverse energy consumption plate and a longitudinal energy consumption plate which are perpendicular to each other are connected between the two end plates, one side of the longitudinal energy consumption plate is in contact with the side wall of the transverse energy consumption plate, the upper ends and the lower ends of the transverse energy consumption plate and the longitudinal energy consumption plate are rotationally connected with the corresponding end plates, the transverse energy consumption plate can rotate back and forth in the direction of the longitudinal energy consumption plate, and the longitudinal energy consumption plate can rotate back and forth in the direction of the transverse energy consumption plate. According to the bidirectional shearing metal damper, bidirectional separate energy consumption can be realized, bidirectional coupling deformation can be effectively adapted, and stable and reliable bearing capacity, rigidity and energy consumption capacity can be provided under the bidirectional coupling deformation.

The invention discloses a cantilevered floor slab rebar structure adopting steel bar truss formworks and a bar reinforcing method. The problem that support formworks of a cast-in-place cantilevered reinforced concrete floor slab of an existing high-altitude cantilever floor have support difficulties and are long in construction period and high in construction price is solved. A main building structure (8) is included, a steel beam cantilever frame composed of steel beams (9) parallel to the main building direction and steel beams (10) perpendicular to the main building direction is arranged onthe outer side of the main building structure (8) in an overhang manner, steel beam panels (11) parallel to the main building direction are arranged on the steel beams (9) parallel to the main building direction, and steel beam panels (13) perpendicular to the main building direction are arranged on the steel beams (10) perpendicular to the main building direction, the steel bar truss formworks are fixedly welded to the steel beam cantilever frame and are composed of rectangular bottom mold steel plates (1) and steel bar framed bents fixedly arranged in the left-right direction at intervals,and the steel bar framed bents are fixedly arranged on the rectangular bottom mold steel plates in the left-right direction. The on-site reinforcement lashing workload can be reduced by 60% to 70%.

The invention discloses a steel truss support unloading structure and an unloading construction method. The steel truss support unloading structure comprises at least three steel trusses, connecting pipes symmetrically arranged in the middles of the two sides of each steel truss, and trucks symmetrically arranged at the bottom of each steel coupling beam; the dismounting structure comprises steelcolumn limbs, hemispheres arranged at the bottoms of the steel column limbs, sliding shoes connected with the tracks in a clamped mode, pressing plates used for fixing the sliding shoes and the hemispheres and supporting assemblies symmetrically arranged on the two sides of each steel column limb; each supporting assembly comprises a pipe support, a jack and a jack base; and the jack bases are arranged on the tracks, the lower ends of the connecting pipes are erected on the pipe supports, and each jack is arranged between the bottom of the corresponding pipe support and the corresponding jackbase. The equipment is simple in structure, convenient to machine, flexible in arrangement, reliable in bearing capacity, safe, stable and capable of meeting unloading use of all support point positions; meanwhile, the tool can completely detach the sliding trucks so that the trucks can be used in different projects in a turnover mode; and the popularization value is quite high.

The invention provides a concrete lattice wall and discrete material pile combined deep soft soil foundation reinforcement treatment structure and a construction method. A reinforced concrete lattice wall which is orthogonal in the transverse direction and the longitudinal direction is arranged on a deep soft soil foundation; discrete material piles such as gravel piles or sand piles are arranged in the center of the concrete lattice wall frame; the bottoms of the concrete lattice wall and the discrete material piles are located on a soft foundation bottom dense layer or weathered bed rock; and the horizontal permeable cushion layer is arranged at the tops of the concrete lattice wall and the discrete material piles. According to the deep soft soil foundation condition, the rigid reinforcing structure and the flexible reinforcing body are reasonably utilized to jointly reinforce the soft soil foundation, and meanwhile, the reinforcing treatment measure and method create conditions for accelerating drainage consolidation of foundation soft soil and improving the strength of the foundation soft soil, the strength, the bearing capacity and the deformation modulus of the soft soil foundation meet the requirements of an upper structure and a building. And the method is of great significance to a deep soft soil foundation treatment technology under complex conditions.