45results about How to "Reduce vertical deformation" patented technology

The invention relates to a guiding-beam-free integral thrusting construction method of a network tied arch bridge. The method is characterized in that the following structure and method are adopted for thrusting the network tied arch bridge: a vertical jack is arranged at the front end in the thrusting direction of a steel box tie beam; a sliding mechanism which can ensure a piston of the jack toslide on the top surfaces of temporary piers is arranged on the top surfaces of the temporary piers; during thrusting, when the front end of the arch bridge is close to the temporary piers, the piston of the jack moves downwards to push against the sliding mechanism and the height of the front end of the arch bridge relative to the top surfaces of the temporary piers is adjusted by controlling the extension elongation of the piston to ensure chutes at the bottom of the steel box tie beam to fall on pulleys; and the chutes are supported by the pulleys and slide relative to the pulleys along with thrusting movement of the arch bridge. The method has the following beneficial effects: in the thrusting process, a main arch ring, inclined hangers, the steel box tie beam, the temporary supports and the like are integrally thrust, thus giving play to the function of partial inclined hangers to enhance the structural rigidity in the thrusting process, simultaneously avoiding installation inconvenience and construction difficulty after the members are thrust in place and improving the thrusting construction efficiency.

The invention provides an unbonded prestressed reinforced earth construction method and a device thereof. The method comprises the following steps of: preliminarily connecting a reinforcement material with a first-layer baffle plate through an anchor device, and preliminarily fixing the first-layer baffle plate through the reinforcement material; continuously filling earth and compacting till a second layer is laid in the height position of the reinforcement material, laying the unbonded prestressed reinforcement material, and fixing the reinforcement material with a second-layer baffle plate according to the same method with the first layer; sequentially performing the operation till the completion of filling of a whole earth bank or a side slope; and finally applying prestress on the unbonded prestressed reinforcement material of each layer. The device comprises the unbonded prestressed reinforcement material and the anchor device, and the unbonded prestressed reinforcement material and the anchor device are mutually connected. The unbonded prestressed reinforced earth construction method is of a geotechnological reinforcement method with the combination of active and passive ways, and the purposes of increasing the strength of the filled earth and controlling and regulating the vertical deformation of the filled earth can be achieved through the interaction among the reinforcement material, the baffle plates as well as the anchor device and the filled earth.

Disclosed is a substrate processing apparatus, including: a processing chamber to accommodate a plurality of substrates therein in such a way that the substrate are vertically stacked; a gas supply system to supply processing gas into the processing chamber; an exhaust system to exhaust an atmosphere from the processing chamber; at least a pair of electrodes made of flexible member extending in a stacking direction of the substrates to activate the processing gas; and protecting tubes to accommodate the electrodes therein, wherein each of the protecting tubes is provided with a bent portion at a higher position than an uppermost substrate, and a tip end of each of the electrodes is located on a tip end side of each of the protecting tubes over the bent portion.

The invention discloses a hanging-basket and bent-cap-support matched integral construction method for a side span linear segment of a high-pier continuous rigid frame bridge. Reinforcing steel bars are bound at a time; pouring is carried out twice; in other words, a section is formed in a pouring mode through a hanging basket in the first time of pouring, and a left solid section is formed in a pouring mode in the second time of pouring. Most of the solid section formed in the second time of pouring is located on a bent cap, and a fraction of the solid section is located on the hanging basket. The hanging-basket and bent-cap-support matched integral construction method has the advantages that the construction procedure can be simplified, the construction period can be saved, and the construction cost can be saved.

The invention discloses a tire-gravel drainage pile composite foundation treatment method. The method includes the following steps: step1, determining related parameters including reinforcing range of a foundation, pile body arranging mode, interval of tire-gravel piles, reinforcing depth of the foundation, pile diameter, filling quantity in pile holes and thickness of gravel cushion layers at the tops of sand gravel piles; step 2, according to the parameters acquired in step 1, performing construction, namely fixing sleeves at positions of a pile body arranged, beating the sleeves into soil at the preset design depth, arranging a tire in each sleeve, putting gravel into the inner side of each tire, and pulling out the sleeves to the set height, wherein the gravel in the sleeves is discharged into the soil by compressed air; vibrating while drawing the sleeves to the ground to form piles. The advantages that gravel piles are high in construction speed, conducive to accelerating of drainage and consolidation of foundation soil, low in manufacturing cost and the like, of the gravel piles in composite foundation treatment are combined.

The invention discloses a carbon nanotube / fiber concrete for 3D printing and a preparation method thereof. The carbon nanotube / fiber concrete is composed of following raw materials in parts by weight:6.8 to 8.6 parts of cement, 3.0 to 6.7 parts of mineral powder, 1.3 to 2.7 parts of silica fume, 4.7 to 13.8 parts of quartz sand, 2.0 to 4.1 parts of water, 0.2 to 0.5 part of water reducer, 0 to 0.03 part of retarder, 0 to 0.004 part of thixotropic agent, 0.05 to 0.25 part of fibers, 0.0008 to 0.008 part of carbon nanotube, and 0.003 to 0.16 part of dispersant. The provided carbon nanotube / fiber concrete has the advantages of proper initial setting time, proper final setting time, high compression strength, high bending strength, good toughness, good workability, and excellent thixotropic property; layers can be effectively bonded, during the stacking process, deformation and collapse are avoided; the setting and thixotropic properties of the concrete can be precisely designed accordingto the needs of engineering; and different needs such as printing speed, structures, and the like, can be satisfied.

The invention provides a base plate material for a rail fastener, and a preparation method and application of the base plate material. The base plate material is prepared from a component A and a component B, wherein the component A is prepared from the following raw materials in parts by mass: 100 parts of chain extender A-1, 0-50 parts of water A-2, 10-100 parts of foam stabilizers A-3 and 0.1-2 parts of catalysts A-4, and the component B is prepared from polyether polyol B-1 and isocyanate B-2 by reaction, wherein the content of the isocyanato of the component B is 1%-10% (w / w), and the ratio of the amount of the isocyano in the component B to the amount of hydroxy in the component A is 1.05-1.15. The polyurethane material has better wear resistance, fatigue resistance and resilience characteristic; in addition, a fiber-reinforced layer is added to a novel small-radius curve base plate prepared from the polyurethane material, the transverse deformation resistance of the base plate can be greatly increased, the rigidity of the base plate can be improved, and accordingly, vertical deformation is decreased.

The invention discloses a structural form of a bearing wall and a floor cover of a cold-formed thin-walled steel house, and belongs to the technical field of building systems. The structural form of the bearing wall and the floor cover of the cold-formed thin-walled steel house comprises the following modes that a floor system edge beam sleeves a floor system edge supporting beam and a floor system supporting beam, the floor system edge supporting beam, floor system supporting beam and the floor system edge beam are wall-mounted on a wall, a profiled steel sheet is paved on the floor system edge supporting beam, a floor system supporting beam and the floor system edge beam, the surface of the profiled steel sheet is cast with gypsum-based self-leveling mortar or concrete and mortar and thelike, an integral floor system composed of the floor system edge beam, the floor system edge supporting beam, the floor system supporting beam, the profiled steel sheet, the gypsum-based self-leveling mortar or concrete, mortar and the like provides effective rigidity for a fabricated cold-formed thin-walled steel structure floor system, the vertical deformation of the floor system and the vibration caused by walking can be reduced, and the comfort and applicability of the fabricated cold-formed thin-walled steel structure floor system can be effectively improved.

The invention discloses a Chinese medicinal material slicing device which automatically controls the slice thickness, relates to the field of traditional Chinese medicine processing equipment, and solves the technical problems that the pressing mechanism of the existing equipment is easy to flatten the material and the thickness of the cutting material is difficult to adjust. It includes a frame, The slicing mechanism and the driving device for feeding, the slicing mechanism is provided with a cutter head drive end, the drive device realizes left and right reciprocating motion through the incomplete gear shaft, the cutter head is perpendicular to the moving direction of the drive device, the cutter head drive end and the incomplete gear shaft pass through the The gear steering mechanism is connected with the driving motor, and the bevel gear steering mechanism includes two bevel gear shafts. The two bevel gear shafts are provided with transmission ends with adjustable diameters, and are respectively connected with the drive end of the cutter head and the incomplete gear shaft. In the present invention, the diameter of the shaft connected to the transmission device is adjusted to change the rotational speed ratio, thereby adjusting the slice thickness and speed. The utility model is suitable for slicing Chinese medicinal materials whose slice thickness is automatically controlled.

The invention discloses a beam-rail integrated medium-and-low speed maglev track beam, which comprises a concrete beam (1), an F rail (2) and a connecting device, wherein that connecting device comprises a bolt (3), a first connector (6), a second connector (7) and a shear nail (8), and a plurality of stiffened plates (9) are arrange on a side of the T-shaped connecting structure adjacent to the Frail (2) along the length direction of the rail beam. The rail integration medium and low speed maglev rail beam eliminates the existing steel beam, fasteners, bearing platform and support structureof the medium and low speed maglev rail beam, greatly reduces the height of the whole rail beam structure, and the load such as car body movement borne by the F rail directly passes through the beam.Transfer of rail-integrated structure, in addition to the super-high section of the beam in the curve. The rail-integrated structure directly bears the transverse shear force caused by the rail inclination, which not only improves the performance of the rail, but also improves the stability of the rail. The transfer efficiency of the force between the beams, and effectively avoid the load caused by rail structural failure between beams.

The invention provides a strengthening method for resisting progressive collapse through a steel frame structure. Through the design method for resisting progressive collapse in the standard, the position of a key pillar is determined. After the key pillar is chosen and determined, the key pillar is assumed as a destroyed steel pillar, and single oblique ribs or double oblique ribs are additionally arranged on joist steel of the two sides of the destroyed steel pillar. The pressure arching effect of the key pillar position is reinforced, and the redundancy degree and the progressive collapse resistance property of a newly-built building are improved. Or after a weak pillar or a destroyed pillar is known through exploration and observation, the weak pillar or the destroyed pillar is assumed as the destroyed steel pillar. According to the arrangement conditions of building components and site conditions of construction, the single oblique ribs or the double oblique ribs are chosen for strengthening, and strengthening for progressive collapse resistance is achieved. The strengthening method for resisting progressive collapse through the steel frame structure is simple in design and mounting and good in economic benefits. Oblique ribs and regular stress components are not superimposed, so that the strengthening method for resisting progressive collapse through the steel frame structure is applied to a newly-built structure, strengthening reconstruction of an existing structure, a full welding beam pillar joint point, and an end plate connecting beam pillar joint point.

The invention provides a non-adhesion prestressing reinforcement material. A main stressed part comprises an internal reinforcement material and an outer layer reinforcement material; the internal reinforcement material is arranged inside the outer layer reinforcement material; the outer layer reinforcement material is made of polypropylene or polyvinyl chloride high molecular polymer; the internal reinforcement material is a high-elasticity modulus reinforcement material; and a lubricating agent is filled between the internal reinforcement material and the outer layer reinforcement material. According to the non-adhesion prestressing reinforcement material, the supporting effect of the reinforcement material on a soil body can be improved through the high-elasticity modulus reinforcement material in a tensioning inner layer. Therefore, the constraint of reinforcement belts on the soil body is increased, and the vertical deformation of filled earth is reduced; the non-adhesion prestressing reinforcement material can slide between the inner layer and an outer layer, so that the soil body cannot be driven to move towards the two sides in the tensioning process; and a composite material is formed by the outer layer reinforcement material and the soil body, so that the deformation of the soil body is further constrained. By mutually connecting a secondary stressed part with the main stressed part, the deformation of the soil body among the reinforcement belts on the same layer can be coordinated.

The invention discloses a device for slicing rhizome Chinese medicinal materials, relates to the technical field of traditional Chinese medicine processing, and solves the technical problem that the existing equipment requires frequent manual feeding during the slicing process. The hopper, the slicing mechanism includes the driving end of the cutter head and the cutter head, the feeding mechanism includes a pushing device and a driving device, the pushing device is arranged below the feeding hopper, one side of the pushing device is adjacent to the cutter head, and the pushing device The other side of the device is connected to one end of the driving device. The driving device includes a toothed metal frame and an incomplete gear shaft. The toothed metal frame is sleeved on the outside of the incomplete gear shaft. reciprocating motion. The material pushing device of the present invention realizes automatic material feeding by driving the toothed metal frame to reciprocate left and right through incomplete gear shaft rotation; it is suitable for slicing rhizome Chinese medicinal materials.

The invention provides a lifting closure construction method of arch ribs of an arch bridge. An arch rib is divided into two arch foot-arch rib sections, an arch rib lifting section and two arch rib closure sections for connecting the arch rib lifting section and the arch foot-arch rib sections. The arch foot-arch rib sections are directly assembled at the designed installation position, the archrib lifting section is assembled on a support below the designed installation position, and the arch rib lifting section is lifted to the designed elevation after assembly and connected with the archfoot-arch rib sections through the closure sections. The arch foot side arch ribs and the arch rib lifting section can be spliced at the same time, and the construction period can be shortened; the arch rib lifting section is machined at a lower position and then lifted to the designed elevation after machining is completed, so that the aerial work amount is reduced, the deformation amount of thearch rib in the horizontal direction and the vertical direction in the lifting process is reduced, and the construction safety and the installation precision are improved.

The invention discloses a pipe periphery backfilling material suitable for a flexible pipeline and a preparation method and a backfilling method of the pipe periphery backfilling material. The pipe periphery backfilling material comprises the following components: 12 wt%-17 wt% of water, 1.2 wt%-1.5 wt% of cement, 14 wt%-19 wt% of fly ash, 53 wt%-57 wt% of fine sand, 6.2 wt%-7.6 wt% of stone powder, 0.4 wt%-0.6 wt% of a setting accelerator and 0.2 wt%-0.7 wt% of a water reducing agent. According to the pipe periphery backfilling material suitable for the flexible pipeline and the preparation method and the backfilling method of the pipe periphery backfilling material, the material does not need layered compaction in the backfilling process, it can be guaranteed that backfilling is dense at the haunch corner of the flexible pipeline, the stability of the overall structure of a flexible drainage pipe under a heavy-load pavement is guaranteed, the problems of pavement collapse, cracking and the like can be solved, the backfilling operation efficiency of the flexible drainage pipe is improved, and the backfilling cost is reduced. The preparation method and the backfilling method are simple and convenient to use.

The invention provides an unbonded prestressed reinforced earth construction method and a device thereof. The method comprises the following steps of: preliminarily connecting a reinforcement material with a first-layer baffle plate through an anchor device, and preliminarily fixing the first-layer baffle plate through the reinforcement material; continuously filling earth and compacting till a second layer is laid in the height position of the reinforcement material, laying the unbonded prestressed reinforcement material, and fixing the reinforcement material with a second-layer baffle plate according to the same method with the first layer; sequentially performing the operation till the completion of filling of a whole earth bank or a side slope; and finally applying prestress on the unbonded prestressed reinforcement material of each layer. The device comprises the unbonded prestressed reinforcement material and the anchor device, and the unbonded prestressed reinforcement material and the anchor device are mutually connected. The unbonded prestressed reinforced earth construction method is of a geotechnological reinforcement method with the combination of active and passive ways, and the purposes of increasing the strength of the filled earth and controlling and regulating the vertical deformation of the filled earth can be achieved through the interaction among the reinforcement material, the baffle plates as well as the anchor device and the filled earth.

The invention provides a non-adhesion prestressing reinforcement material. A main stressed part comprises an internal reinforcement material and an outer layer reinforcement material; the internal reinforcement material is arranged inside the outer layer reinforcement material; the outer layer reinforcement material is made of polypropylene or polyvinyl chloride high molecular polymer; the internal reinforcement material is a high-elasticity modulus reinforcement material; and a lubricating agent is filled between the internal reinforcement material and the outer layer reinforcement material. According to the non-adhesion prestressing reinforcement material, the supporting effect of the reinforcement material on a soil body can be improved through the high-elasticity modulus reinforcement material in a tensioning inner layer. Therefore, the constraint of reinforcement belts on the soil body is increased, and the vertical deformation of filled earth is reduced; the non-adhesion prestressing reinforcement material can slide between the inner layer and an outer layer, so that the soil body cannot be driven to move towards the two sides in the tensioning process; and a composite material is formed by the outer layer reinforcement material and the soil body, so that the deformation of the soil body is further constrained. By mutually connecting a secondary stressed part with the main stressed part, the deformation of the soil body among the reinforcement belts on the same layer can be coordinated.

The invention relates to the technical field of simulated flight, and specifically discloses a centrifugal flight load and illusion simulation device. The centrifugal flight load and illusion simulation device comprises a transmission supporting system, a rotating arm system, a yawing frame system, a pitching frame system and a cockpit system; wherein the transmission supporting system supports the rotating arm system; the rotating arm system is provided with the pitching frame system and drives the pitching frame system to rotate around a connecting point of the pitching frame system and therotating arm system; the yawing frame system is arranged on the pitching frame system, and the pitching frame system drives the yawing frame system to rotate around a connecting point of the pitchingframe system and the yawing frame system; and the cockpit system is arranged on the yawing frame system, and the yawing frame system drives the cockpit system to rotate around a connecting point of the cockpit system and the yawing frame system. The centrifugal flight load and illusion simulation device has the advantages that a main shaft rotates to generate overload acceleration, three degrees of freedom of yawing, pitching and rolling relative to a human body coordinate system are generated at the tail end of a rotating arm, a trained pilot sits in a cockpit system and bears centrifugal overload acceleration and spatial three-attitude-angle movement, and spatial orientation obstacle simulation training is achieved.

The invention discloses a comprehensive mechanized coal mining face withdraw channel anchor rod and anchor cable supporting determining method. The method comprises the following steps that firstly, the radius of a top plate breaking zone and the radius of a plastic zone are calculated; secondly, parameters of top plate anchor rods are calculated, wherein the parameters of the top plate anchor rods include the length of the top plate anchor rods, the row distance between the top plate anchor rods and the prestress of top plate anchor ropes; and fourthly, parameters of side anchor rods are calculated, wherein the parameters of the side anchor rods include the length of the side anchor rods, the row distance between the side anchor rods and the prestress of the side anchor rods. By means ofthe determining method, it can be ensured that a working face support in coal mine production can be withdrawn in a safe state; and furthermore, the production cost of a coal mine can be reduced, theproduction efficiency can be improved, and theoretical reference is provided for the design and study of coal mine withdraw road supports in future.

Disclosed is a substrate processing apparatus, including: a processing chamber to accommodate a plurality of substrates therein in such a way that the substrate are vertically stacked; a gas supply system to supply processing gas into the processing chamber; an exhaust system to exhaust an atmosphere from the processing chamber; at least a pair of electrodes made of flexible member extending in a stacking direction of the substrates to activate the processing gas; and protecting tubes to accommodate the electrodes therein, wherein each of the protecting tubes is provided with a bent portion at a higher position than an uppermost substrate, and a tip end of each of the electrodes is located on a tip end side of each of the protecting tubes over the bent portion.

The invention relates to a combined U-shaped beam structure for medium-low-speed maglev traffic, wherein the structure is used for effectively reducing the height of a bridge, improving the landscape of the bridge, facilitating transportation, erection and construction, facilitating operation and maintenance and improving the adverse effect of temperature on the premise of meeting the requirements of rigidity, deformation and the like of a maglev train. A combined structure is formed by a U-shaped beam and a rail bearing beam, and the rail bearing beam continuously extends in the line direction. The section of the U-shaped beam is in a U shape, the U-shaped beam is provided with a U-shaped beam bottom plate and U-shaped beam webs on the two sides, the rail bearing beam is provided with a rail bearing beam top plate and rail bearing beam webs on the two sides, and the lower ends of the rail bearing beam webs on the two sides are fixedly connected with the U-shaped beam bottom plate to form a whole. Power supply rails are arranged on the outer walls of web plates of the rail bearing beams on the two sides, rail bearing tables are fixedly installed on top plates of the rail bearing beams, rail structures are fixedly installed on the rail bearing tables, and cable supports are fixedly installed on the inner walls of web plates of the U-shaped beams on the two sides.

The invention relates to a floor system composed of GRC hollow box body composite boards and a construction method thereof. The floor system composed of the GRC hollow box body composite boards is formed by mutually connecting special-shaped composite columns, composite beams and composite boards, wherein the special-shaped composite columns are special-shaped composite columns with internally installed shape steel or FRP profiles, the composite beams are sunken type shape steel or FRP profile concrete composite beams, and the composite boards are composite boards with prestressed hidden beamsand equipped with GRC hollow box bodies; the GRC hollow box body composite boards with bidirectional prestressed hidden beams are composed of upper bidirectional slab reinforcements, lower bidirectional slab reinforcements, the bidirectional prestressed hidden beams, the GRC hollow box bodies and GRC hollow box body vertical fixing devices. According to the floor system composed of the GRC hollowbox body composite boards and the construction method thereof, the GRC hollow box bodies are arranged in floors, sound transmitting routes can be cut off through the GRC hollow box bodies evenly arranged in the floors, a good sound insulation effect is realized, and the problem of noise pollution caused by the poor sound insulation effect between the floors is solved.

The invention discloses an integral construction method of the straight section of the side span of a high-pier continuous rigid frame bridge with a hanging basket combined with a cover beam support. The steel bars are bound and formed at one time, and the pouring is carried out twice; The remaining solid section of the second pouring; most of the solid section of the second pouring falls on the cover beam, and a small part falls on the hanging basket. The invention has the advantages of being able to simplify the construction procedure, save the construction period, save the construction cost and the like.

The invention relates to a stiffening composite suction caisson foundation with convex edges. The caisson foundation comprises a cement soil mixing pile reinforcing body and a suction caisson foundation body embedded in the cement soil mixing pile reinforcing body; the suction caisson foundation body is cylindrical, the upper end of the suction caisson foundation body is provided with a sealing cover, and the lower end of the suction caisson foundation body is provided with an opening; the sealing cover is provided with a cable guide hole and a drainage valve; the drainage valve communicates with an inner cavity of the suction caisson foundation body; the outer surface and the inner cavity of the suction caisson foundation body are provided with a plurality of outer convex edges and innerconvex edges respectively; the cross sections of the outer convex edges and the inner convex edges are each in a right triangle shape; and the inner convex edges and the outer convex edges are arranged on the inner and outer surfaces of the suction caisson foundation body in a circular ring or segmented circular ring shape. The uplift bearing capacity of the suction caisson foundation can be greatly improved, and the overall stability of a fan structure is ensured.

The invention discloses a high-rigidity rolling mill and belongs to the technical field of metal pressure processing. The high-rigidity rolling mill comprises a stander, a press-down system and a roller system, wherein an upper backup roller bearing pedestal is arranged between the press-down system and the roller system; a compaction inclined wedge block is arranged between the stander and the upper backup roller bearing pedestal; the compaction inclined wedge block is upward connected with a compaction hydraulic cylinder; the compaction hydraulic cylinder is fixedly connected with the stander; and the compaction inclined wedge block is downward spliced with the upper backup roller bearing pedestal to form a self-locking state. The high-rigidity rolling mill has the characteristics of high rigidity and high milling precision.

The invention discloses a prestressed concrete cover beam based on a prefabricated prestressed UHPC shell and a construction technology thereof, the cover beam comprises the UHPC shell, a support, a pier column, a reinforcement cage, a concrete rib, an I-shaped steel rib and a prestressed reinforcement, and the UHPC shell is arranged at the top of the pier column through the support; common concrete is poured in the UHPC shell; concrete ribs and I-shaped steel ribs are arranged on the inner surface of the UHPC shell; prestressed reinforcements are arranged at the tops of the I-shaped steel ribs; a prestressed tendon / cable is further arranged in the UHPC shell and fixedly connected with the UHPC shell. The construction technology comprises the steps that the prefabricated UHPC shell is hoisted to the top of the pier column; i-shaped steel ribs are mounted in the UHPC shell; installing prestressed reinforcements at the tops of the I-shaped steel ribs; tensioning the prestressed steel bars and then fixing the prestressed steel bars on the I-shaped steel ribs; prestressed tendons / cables are arranged in the UHPC shell; common concrete is poured into the UHPC shell; and after the common concrete reaches the design strength, the prestressed tendons / cables are tensioned, and finally the prestressed tendons / cables are fixed to the UHPC shell through base plates and anchorage devices.

The invention relates to a floor system composed of GRC hollow box body composite boards and a construction method thereof. The floor system composed of the GRC hollow box body composite boards is formed by mutually connecting special-shaped composite columns, composite beams and composite boards, wherein the special-shaped composite columns are special-shaped composite columns with internally installed shape steel or FRP profiles, the composite beams are sunken type shape steel or FRP profile concrete composite beams, and the composite boards are composite boards with prestressed hidden beamsand equipped with GRC hollow box bodies; the GRC hollow box body composite boards with bidirectional prestressed hidden beams are composed of upper bidirectional slab reinforcements, lower bidirectional slab reinforcements, the bidirectional prestressed hidden beams, the GRC hollow box bodies and GRC hollow box body vertical fixing devices. According to the floor system composed of the GRC hollowbox body composite boards and the construction method thereof, the GRC hollow box bodies are arranged in floors, sound transmitting routes can be cut off through the GRC hollow box bodies evenly arranged in the floors, a good sound insulation effect is realized, and the problem of noise pollution caused by the poor sound insulation effect between the floors is solved.

The invention discloses a carbon nanotube / fiber concrete for 3D printing and a preparation method thereof. The carbon nanotube / fiber concrete is composed of following raw materials in parts by weight:6.8 to 8.6 parts of cement, 3.0 to 6.7 parts of mineral powder, 1.3 to 2.7 parts of silica fume, 4.7 to 13.8 parts of quartz sand, 2.0 to 4.1 parts of water, 0.2 to 0.5 part of water reducer, 0 to 0.03 part of retarder, 0 to 0.004 part of thixotropic agent, 0.05 to 0.25 part of fibers, 0.0008 to 0.008 part of carbon nanotube, and 0.003 to 0.16 part of dispersant. The provided carbon nanotube / fiber concrete has the advantages of proper initial setting time, proper final setting time, high compression strength, high bending strength, good toughness, good workability, and excellent thixotropic property; layers can be effectively bonded, during the stacking process, deformation and collapse are avoided; the setting and thixotropic properties of the concrete can be precisely designed accordingto the needs of engineering; and different needs such as printing speed, structures, and the like, can be satisfied.

The invention relates to a reinforcement combination of a suction caisson foundation and a cement-soil mixing pile. The invention includes a suction caisson foundation. The interior and exterior of the suction caisson foundation are provided with cement-soil mixing pile reinforcements. The suction caisson foundation includes a cylinder Body, the lower end of the cylinder is open, the upper end of the cylinder is provided with a cover, the cover is provided with a fairlead and a drain valve, and the drain valve communicates with the inner cavity of the cylinder; the present invention uses a suction type The foundation treatment before the caisson foundation sinks makes the suction caisson foundation and the cement-soil mixing pile form a whole, so as to improve the vertical and horizontal bearing capacity of the suction caisson foundation.

The invention discloses a beam-rail integrated structure, which comprises an f rail and a concrete beam, wherein the f rail is arranged between the f rail and the concrete beam (1); the connecting device comprises parallel and perpendicular to the concrete beam (1) is arranged on the top of the concrete beam or pre-buried in the concrete beam (1) a first connecting piece and a second connecting piece, wherein the first connecting piece is used for fixing the f rail and the first connecting piece. The invention further discloses a medium and low speed magnetic levitation track beam with the beam and rail integrated structure. According to the beam and rail integrated structure, the height of the whole rail beam structure is greatly reduced, the motion of a vehicle body borne by the f rail and the like are directly transmitted through an integrated structure of the beam and rail, and the curve ultrahigh-section beam. The rail integrated structure directly bears the transverse shearing acting force caused by inclination of the rail, so that not only is the rail improved, but also the rail. The force transmission efficiency of the beams is improved, and the structure faults among the rail beams caused by the load action are effectively avoided.