32results about How to "Meet specification requirements" patented technology

A liquid cargo ship cabin sweeping system meeting MARPROL requirements is characterized in that a liquid cargo deep-well pump and a heater are located in a cargo cabin area, the liquid cargo deep-well pump is provided with a cabin sweeping connector and a liquid cargo connector, the liquid cargo connector is connected with an inlet of the heater through a pipeline, the cabin sweeping connector is connected with a cabin sweeping pipeline and a liquid cargo discharging main pipe, and the liquid cargo discharging main pipe is connected with a liquid cargo collecting pipe area main pipe; the liquid cargo collecting area main pipe is provided with a liquid cargo by-pass pipeline, and the sweeping pipeline is communicated with the liquid cargo by-pass pipeline. A liquid cargo pump sweeping discharge valve is arranged at the position, close to the sweeping connector, of the sweeping pipeline, and a liquid cargo pump sweeping discharge valve is arranged at the position, close to the sweeping connector, of the liquid cargo discharge main pipe. According to the system, the special small-opening sweeping pipeline is additionally arranged in the system, liquid cargos are swept from the collecting pipe area to the cargo hold area and discharged out of the main pipe, the accumulated liquid cargos are discharged into the small-opening sweeping pipeline, the pipeline sweeping time is shortened, the workload of operators is reduced, the good sweeping effect can be achieved, and the standard requirement is met.

The invention discloses a spatial cross-correlation multipoint seismic motion synthesis method and device for fitting a response spectrum, and the method comprises the steps: obtaining a seismic motion acceleration time history of a high-precision fitting target response spectrum through an influence matrix method, and calculating a Fourier amplitude spectrum and a phase spectrum of the seismic motion acceleration time history; a calculation relation between a power spectrum density function and a Fourier amplitude spectrum is considered, the power spectrum density function of the obtained time history is used as an initial value, a random vibration theory and Cholesky decomposition are utilized to obtain a spatial cross-correlation multi-point seismic oscillation time history, a phase spectrum of the seismic oscillation time history of a high-precision fitting target response spectrum is further included, and the spatial cross-correlation multi-point seismic oscillation time history is obtained. And the spatial cross-correlation multi-point seismic oscillation of the fitting response spectrum can be obtained through correction iteration. According to the method, the defects that the fitting effect with the target response spectrum and the non-stability of the synthesized seismic oscillation are difficult to guarantee in the current multipoint seismic oscillation time-history synthesis technology are overcome, and the reliability of a dynamic response analysis result of a large-scale engineering structure under the multipoint seismic oscillation effect is improved.

The utility model relates to a structure for treating permeation stability of a double-layer embankment foundation, which comprises the embankment foundation, an embankment body is arranged above the embankment foundation, a clay inclined wall is arranged on the upstream side of the embankment body, the bottom of the clay inclined wall is connected with the top of a high-pressure-spraying anti-seepage wall, the bottom of the high-pressure-spraying anti-seepage wall extends into an impervious layer, and the bottom of the high-pressure-spraying anti-seepage wall is connected with the top of the high-pressure-spraying anti-seepage wall. The slope toe of the clay inclined wall is provided with a concrete interlocking block and a grouted rubble foot protection part, the top elevation of the concrete interlocking block protection part is higher than the embankment foot backfill ground line, a geomembrane is arranged at the top of the high-pressure-spraying anti-seepage wall and is laid in the geomembrane tooth groove laying direction, and one end of the geomembrane is fixed in the geomembrane tooth groove fixing direction. The embankment body adopts the clay inclined wall, so that the anti-seepage effect is good, and the embankment foundation deformation adaptability is high. The high-pressure spraying anti-seepage wall is adopted in the embankment foundation, seepage can be effectively blocked, the seepage path can be effectively prolonged, and seepage damage is prevented.

The invention provides a mixed reality-based substation co-simulation training system construction method and system, and the method comprises the steps: determining a specific target of a training system, and inputting the specific target; analyzing the target, and making a training system construction plan based on an analysis result; creating a simulation training system virtual model of the transformer substation based on the training system construction plan, and importing the simulation training system virtual model into the mixed reality platform; checking the functions of the system, including the accuracy of the model, the fluency of interaction and the effectiveness of cooperative work, and predicting the use effect of the training system; comparing expected effects on the basis of the predicted value of the use effect of the training system, and deploying the system to an actual use environment when the expected effects are achieved; and the operation condition of the system is monitored regularly. According to the method, the training effect can be predicted in advance, so that optimization can be performed according to prediction of the training effect, and the training efficiency is maximized.

The invention relates to the technical field of raw material squeezing and extraction, in particular to a torreya grandis oil grease separation and purification mechanism and method.The torreya grandis oil grease separation and purification mechanism comprises a filter box, a pressure pump, a first filter plate, a second filter plate, a closed structure and a sliding filter structure, the filter box is provided with a feeding pipe and a discharging pipe, and the first filter plate is slidably arranged in the filter box; the second filter plate is arranged in the discharging pipe, the sealing structure is arranged on one side of the first filter plate and used for reducing oil leakage when the first filter plate is replaced, the sliding filter structure is arranged on one side of the first filter plate in a sliding mode, and the pressure pump is used for providing negative pressure at the discharging pipe. Meanwhile, filtering can be continuously carried out through the sliding filtering structure during replacement, so that continuous work can be realized, and the working efficiency is improved.

The invention discloses a new energy photovoltaic intelligent management method and management system. The method comprises the following steps: collecting photovoltaic, inverter, energy storage, weather and power grid data in real time through a multi-source sensor network; time alignment and feature extraction are carried out, and abnormities such as hot spots, insulation degradation and battery attenuation are identified; building a day-ahead, intra-day and second-level three-layer collaborative optimization model, and dynamically generating a power scheduling instruction; and intelligent fault diagnosis and self-healing control are realized based on the knowledge graph. The system comprises a multi-source data acquisition module, a data fusion module, a multi-time scale optimization module, a fault diagnosis module and a man-machine interaction module. According to the invention, through full-dimension perception and multi-level cooperation, the energy utilization efficiency, the scheduling flexibility and the fault recovery speed are significantly improved, and high-permeability photovoltaic safety grid connection is supported.

The utility model discloses a marine LNG storage tank high liquid level alarm system which is characterized in that a vent pipe is arranged on an LNG storage tank and comprises a high-position alarm overflow pipe and a high-position alarm overflow pipe, one end of the high-position alarm overflow pipe and one end of the high-position alarm overflow pipe are communicated with the LNG storage tank through cabin penetrating pieces, and the other end of the high-position alarm overflow pipe and the other end of the high-position alarm overflow pipe are communicated with the vent pipe; a high-position alarm temperature sensor and a high-position alarm overflow pipe remote control valve are arranged on the high-position alarm overflow pipe, and the high-position alarm overflow pipe remote control valve is located on the side, away from the LNG storage tank, of the high-position alarm temperature sensor; a high and high level alarm temperature sensor, a high and high level alarm overflow pipe remote control valve and a cut-off piece are arranged on the high and high level alarm overflow pipe, the high and high level alarm overflow pipe remote control valve is located between the high and high level alarm temperature sensor and the cut-off piece, and the high and high level alarm temperature sensor is located on the side, close to the LNG storage tank, of the high and high level alarm overflow pipe remote control valve. The alarm system provided by the utility model eliminates the situation of false alarm of high-position alarm and high-position alarm.

The utility model provides a compensation strip for curtain wall glass, which relates to the technical field of glass curtain wall installation and comprises a compensation strip body, and the compensation strip body comprises an insertion block end and an insertion groove end. The insertion block end of the compensation strip body is connected with a cross beam keel or a stand column vertical keel, and the insertion groove end is connected with a glass rubber strip which is connected with glass. The section of the inserting block end is rectangular, the inserting block end is fixedly connected with the inserting groove end through a connecting block, and the section of the connecting block is trapezoidal; the connecting blocks and the inserting block ends are matched and inserted with the inserting grooves of the cross beam keels or the stand column vertical keels; an opening is formed in the portion, away from the inserting block end, of the inserting groove end, and the opening is communicated with the rectangular groove in the inserting groove end. The glass curtain wall has the advantages of being easy to produce, convenient to install, attractive, firm and capable of keeping the structure of the glass curtain wall uniform.

The invention relates to an anchor rod pull-out test control method and system, an anchor rod pull-out test is multi-stage loading and multi-stage unloading, and belongs to the technical field of anchor rod detection.The anchor rod pull-out test control method comprises the steps that test parameters are obtained, controlling the oil pump loading flow rate in each loading process and the oil pump unloading flow rate in each unloading process in the anchor rod pull-out test based on the test parameters; and controlling the oil pump loading pressure in each loading process and the oil pump unloading pressure in each unloading process in the anchor rod pull-out test based on the test parameters. In the pull-out test process, the oil pump flow speed and the oil pump pressure in the loading and unloading process of each stage are precisely controlled based on the test parameters, precise speed regulation of the loading and unloading process speed of each stage is achieved, the detection result is precise and reliable, errors are small, the standard requirements are met, and further, the test efficiency is improved by detecting the test state. And when the test state does not meet the preset state condition, the oil pump is controlled to stop working, so that the test safety is ensured.

The invention discloses a flux-cored wire automatic vertical position welding process for 9Ni steel, which comprises the following steps of: S1, according to the technical requirements of the 9Ni steel, smelting the 9Ni steel by an oxygen converter, and performing external refining; the delivery state of the steel plate is quenching and tempering; s2, technical model selection of a matched flux core: selecting a flux-cored wire with the diameter of 1.2 mm; s3, automatic welding equipment is adopted, a welding joint is an X-shaped groove, the depth of a first welding surface accounts for 2 / 3 of the thickness of the steel plate, the angle of the groove is that the first welding surface is 60 degrees, the later welding surface is 60 degrees, the truncated edge is 2 mm, the root gap is 0-3 mm, after welding of the first welding surface of the X-shaped groove is completed, an angle grinder is immediately adopted for cleaning a reverse welding seam, and then welding continues to be conducted; according to the process, flux-cored wire automatic vertical position welding of 9Ni steel is carried out, the welding process is stable and reliable, formed welding seams are attractive and uniform, nondestructive testing and mechanical property testing results of welded joints meet the specification requirements of classification societies, and the stable and reliable welded joints can be obtained.

The invention discloses a management system and method based on digital intelligent Internet of Things, and the system specifically comprises an RFID electronic tag which is disposed in a storage device and is used for marking the identification information of an article in the storage device, an information receiving unit, an information processing unit, an information collection unit, an execution unit, and an information transmitting unit. The information receiving unit obtains an instruction sent by an upper computer, sends the instruction to the information processing unit for analysis, and sends an analysis result to the information acquisition unit and the execution unit for acquisition and control respectively; and the information transmitting unit transmits the acquired running state information to an upper computer, so that the upper computer transmits an instruction according to the current running state information. According to the system, efficient, unified and intelligent management of various articles in the storage equipment is realized.

The utility model belongs to the technical field of building construction, and particularly relates to a universal structure steel bar positioning and paying-off supporting device which comprises a positioning steel pipe socket sleeve, a rotary fixing shaft, a rotary screw buckle, a rotary arm fixing clamping piece and a universal rotary arm. The rotating fixing shaft is sleeved with the rotating screw buckle, rotating arm fixing clamping pieces are welded to the top and the bottom of the rotating screw buckle, the rotating arm fixing clamping pieces are fixedly connected with the rotating fixing shaft, and the universal rotating arm is fixedly connected with the rotating screw buckle. According to the device, installation is easy and convenient, construction is convenient, it can be guaranteed that structural steel bars are accurately positioned, the inclination of a structural wall body is accurate, formwork installation is accurate, curve extension changes are accurate, a steel bar protection layer meets the standard requirement, a structural entity meets the design requirement, and good social benefits and economic benefits can be generated.

The invention relates to the technical field of unmanned aerial vehicle sampling and water area ecological environment quality monitoring, in particular to a mobile self-organizing relay communication unmanned sampling method and system for a wide water area. Comprising a mobile vehicle-mounted console, a mobile self-organizing multistage relay communication link formed by a plurality of unmanned ships, and a collaborative operation unit formed by sampling unmanned aerial vehicles. The unmanned ships are connected end to end according to specific intervals, the signal radiation ranges of the unmanned ships are mutually overlapped, and the unmanned ships are automatically networked to form a continuous communication chain extending to a far-shore wide water area. The sampling unmanned aerial vehicle firstly stably hovers at a first hovering height and then vertically descends to a second hovering height to execute accurate sampling, and after sampling is completed, an automatic return flight instruction is triggered to achieve sample recovery. According to the invention, by constructing the dynamic self-organizing node network and state feedback closed-loop control, the bottleneck of signal transmission and collaborative operation capability of the unmanned aerial vehicle in a wide water area is solved, and large-range, high-efficiency and high-precision automatic unmanned sampling is realized.

The invention relates to a container locking supporting device and an application method thereof. The supporting device comprises a supporting body, a locking shaft and a limiting shaft. The supporting body comprises a connecting part and a pressure bearing part fixed to the top of the connecting part, the connecting part is matched with a side hole of the container, the top face of the pressure bearing part is provided with a concave part, and mounting holes penetrate through the connecting part and the concave part; the lock shaft comprises a limiting part and a connecting shaft fixed to the top of the limiting part, the connecting shaft is rotatably arranged in the mounting hole in a penetrating mode, and the top of the connecting shaft is located in the concave part and provided with an axial through hole. The limiting shaft is detachably and fixedly arranged in the axial through hole in a penetrating manner; the supporting body is provided with various models to be combined with the locking shaft and the limiting shaft according to different thicknesses of the pressure-bearing part. The limiting shaft is detachably and fixedly arranged in the axial through hole in the top of the connecting shaft in a penetrating mode, supporting bodies of different models can be replaced conveniently, containers of different widths can be accurately matched with the guide rails through the supporting bodies of the different models, the containers are not prone to excessively moving and losing stability in the sailing process, and the operation safety of a ship is guaranteed.

The utility model discloses a concrete mould, which relates to the technical field of constructional engineering and comprises a mould body, a mould base, a switch type magnetic seat and a rubber mould plug, the mould body is arranged at the top of the mould base, a demoulding air hole is arranged at the bottom of the mould body, and the rubber mould plug is arranged in the demoulding air hole. The four corners of the bottom of the mold base are each provided with a switch type magnetic base. According to the concrete mold provided by the utility model, the switch type magnetic base is adopted, the mold can be conveniently and quickly fixed on the working table surface of the vibration table, and the demolding air hole is blocked by the rubber mold plug, so that the demolding air hole of the mold can be effectively prevented from being blocked by concrete, and the processing efficiency is favorably improved.

The utility model discloses a device for controlling the distance between exposed flat cable pipes and protecting pipe orifices, which comprises a fixed part and a plurality of sleeves arranged on the fixed part, the front ends of the sleeves are open, the tail parts of the sleeves are arranged on the fixed part, the sleeves are transversely and uniformly distributed and are arranged vertical to the fixed part, and the fixed part is arranged on the fixed part. According to the utility model, under the condition of meeting the standard requirements, the sleeves are installed on the fixed part, and the plurality of sleeves are directly sleeved at the exposed line pipe orifice, so that the exposed butt joint part of the pre-embedded line pipe is not damaged after the installation is completed, and the installation is convenient. And foreign matters such as serous fluid can be effectively prevented from entering the pipe, the fixed distance between the row of wire pipes is ensured, and the standard requirement is met.

The invention relates to the technical field of building thermal testing, and discloses a method for testing the thermal performance of a heterogeneous building wall material, an adopted testing device comprises a hot box and a cold box which are located on the two sides of a test piece frame, and the testing method comprises the following steps that S1, a filling body with known thermal resistance is placed in the test piece frame, and the heat flow QT passing through the filling body is measured; s2, measuring the heat flow QS passing through the filling body embedded with the n test pieces, and respectively measuring the hot side surface temperature Thi of the ith test piece to be tested; s3, the heat flow Qsi passing through the n to-be-tested pieces is obtained through calculation; s4, calculating to obtain a heat transfer coefficient and heat transfer resistance; and S5, calculating the equivalent heat conductivity coefficient of the test piece to be tested. According to the testing method, the heat flow passing through the to-be-tested piece is indirectly obtained by means of the relative relation between the surface temperature of the test piece and the surface temperature of the filling body, the heat transfer resistance, the heat transfer coefficient and the equivalent heat conductivity coefficient parameters of the to-be-tested piece can be tested, and the requirements of existing building material specifications are met.

The utility model discloses a robot control cabinet which comprises an upper box body and a lower box body, the upper box body is sleeved on the lower box body and is connected with the lower box body in a sliding mode, a fixed adjusting mechanism is arranged between the upper box body and the lower box body, the same sides of the upper box body and the lower box body are both provided with openings, and the upper box body and the lower box body are arranged in a sliding mode. An opening of the upper box body protrudes out of an opening of the lower box body, a box door is arranged on the opening, a lock structure is arranged between the box door and the box body, the box door of the upper box body is movably connected to the side edge or the top of the upper box body, the box door of the lower box body is movably connected to the side edge or the bottom of the lower box body, and the upper box body can vertically slide and be fixed on the lower box body through a fixed adjusting mechanism. Therefore, the internal space between the upper box body and the lower box body is changed, the control cabinet meets the specification requirements of control cabinets corresponding to different robots, the design cost of all the control cabinets is reduced, adjustment is conducted at any time in the actual assembly process, and efficiency is improved.

The present invention discloses a floating platform mooring system design method, including: establishing an initial mooring model through OrcaFlex; defining optimization variables, objective functions and constraints, setting each variable to change within a reasonable range; establishing an initial sample set through an adaptive Latin hypercube sampling method, and then calling OrcaFlex for time domain analysis; constructing an initial proxy model using the optimization variable values ​​and the objective function calculation results; calculating the expected improvement, determining the sampling points, iteratively updating, and determining and outputting a solution set that meets the requirements. The present invention uses an improved algorithm to optimize the constructed proxy model, thereby improving the optimization efficiency and reducing the computing power requirements for the machine; realizing the intelligent optimization of the mooring system design scheme, and obtaining the optimal design scheme within the range by setting the initial parameter range, so that the mooring design is simple and fast, and the economic benefits of the mooring system are greatly improved under the premise of meeting the requirements of the specification.

The invention discloses an L-shaped wire arrangement device for CP wires, and the device comprises a first wire guide table which is provided with a plurality of driven wire guide wheels; a plurality of driving wire guide wheels are arranged on the second wire guide table; the third wire guiding table is provided with a wire stroking piece and a guiding wheel, and the wire arranging structure comprises a connecting frame, a plurality of wire guiding wheels, a first arc-shaped forming wheel and a second arc-shaped forming wheel; the multiple driven wire guide wheels and the multiple driving wire guide wheels are arranged in parallel in a staggered mode, CP wires are located between the driven wire guide wheels and the driving wire guide wheels, pass through the wire stroking piece and the guide wheel, finally extend to the wire guide wheel and are subjected to arc forming through the first arc forming wheel and the second arc forming wheel, and the CP wires are circularly stacked in the take-up barrel. When CP circles with larger radiuses need to be guided out to be stored in the material receiving barrel, only the position of the mounting plate on the linear motor or the guide rail needs to be adjusted, so that the radius of the stored CP coils is adjusted, and the requirement for diversified specifications of the material receiving barrel is met.

The invention provides a liquefied hydrocarbon storage tank system covered with a prefabricated hole body. The liquefied hydrocarbon storage tank system comprises a liquefied hydrocarbon storage tank body, the concrete prefabricated hole body, a storage tank body support, a basin type support and a fire-fighting spraying system. The liquefied hydrocarbon storage tank body is connected with a bottom foundation of the concrete prefabricated hole body through the storage tank body support, the concrete prefabricated hole body surrounds the periphery of the storage tank, and a certain interval is kept between the liquefied hydrocarbon storage tank body and the concrete prefabricated hole body; the basin-type support is arranged between a liquefied hydrocarbon storage tank support and a base on a bottom foundation so as to provide the capacity of transverse displacement of the storage tank; the fire-fighting spraying systems are uniformly arranged on the inner side of the concrete prefabricated hole body; the liquefied hydrocarbon tank area comprises a plurality of liquefied hydrocarbon storage tank bodies, and each liquefied hydrocarbon storage tank body is independently sealed in the corresponding independent prefabricated hole body. The problem that deep inspection is difficult to carry out in a traditional soil covering type storage tank system can be solved, inspection and defect repair of the storage tank can be completed without removing covering soil, and the maintenance efficiency is improved.

The utility model discloses a bridge concrete side guardrail pouring assembly type protection device belongs to protection device technical field, a bridge concrete side guardrail pouring assembly type protection device, it includes device main body, and device main body includes the steel connecting rod of multiple sets of the arrangement along guardrail template length direction, multiple sets of steel connecting rod are equipped with the protection subassembly that projects guardrail template top, and the protection subassembly is equipped with the auxiliary assembly along guardrail template length direction department, and the auxiliary assembly includes multiple connecting pieces that are equipped in the inboard place of protection subassembly, and the adjacent connecting piece all is connected with the mounting rod, multiple connecting pieces and mounting rod jointly form the hanging pole structure that extends along guardrail template length direction, and the mounting snap ring that is used for the safety belt installation is slidably equipped at the hanging pole structure department. Through the steel connecting rod and top protection subassembly of the arrangement along guardrail template length direction, form the steady top protection frame, improved construction security, solved the worker safety belt high hanging low use requirement simultaneously, satisfy the standard requirement.

According to the installation technology for adding the bushings to the marine fairlead, the two ends of the fairlead are open, the interior of the fairlead is hollow, the cross section of the fairlead is oval, the middle of the fairlead shrinks, the two ends of the fairlead expand outwards, the middle and the ends of the fairlead are in arc-shaped transition connection, the bushings are installed in the fairlead and comprise the inboard bushings and the outboard bushings, and the inboard bushings and the outboard bushings are in butt joint to form the complete bushings. A rubber floating ball is used for pressing the inboard lining and the outboard lining into the fairlead, and the rubber floating ball is composed of a ball bowl section at the top, an arc-shaped transition section in the middle and a horn mouth section at the tail. The bushings are added to the fairlead, installation is convenient, hot working is not needed, installation of the bushings can be completed in the segment folding stage, the installed bushings are safe and reliable in use, convenient to operate and free of maintenance, and corresponding standard requirements are met.

According to the ammonia fuel reserved arrangement structure of the multipurpose ship, the ammonia fuel cabin is arranged on the deck A on the upper layer of the main deck, the space on the two sides of a superstructure and the space below a wing bridge are fully reserved, a mooring winch and a large number of mooring pieces on the main deck are perfectly avoided, and more rooms can be arranged on the main deck. According to the technical scheme, the position arrangement of the ammonia fuel cabin is reasonable, the fireproof space is enough, the deck channel meets the standard requirement, the personnel accommodation cabin meets the safety requirement, and the structure safety guarantee can be provided for the ship owner to add and modify the ammonia fuel cabin in the later period; containers or other dry goods can be placed on the deck A, so that more loading requirements of the ship owner are met.

The present application relates to the technical field of underground tunnel construction, in particular to a kind of construction method of tunnel hard rock. The upper bench excavation working face is sequentially divided into advance pilot hole milling face and expansion face from left to right, and parallel construction of advance pilot hole and expansion is adopted. Through zoning operation of excavation working face, parallel operation of advance pilot hole excavation and initial support can be realized, effectively avoiding the influence time of traditional upper bench support, ensuring the overall construction progress of the tunnel; the tunnel hard rock advance pilot hole expansion construction method of the present application uses drilling + breaking hammer excavation for expansion face, reduces the amount of upper bench milling, reduces the consumption of cutting teeth, has lower comprehensive cost, reduces dust generation, is beneficial to environmental protection, and has higher use value compared with the traditional bench method milling process.

The invention relates to the technical field of underground cavern and slope engineering surrounding rock stability, and discloses a block stability analysis method and system under a continuum numerical analysis framework, and the method comprises the steps: building a numerical analysis model containing the boundary form of an analyzed block structure surface; carrying out continuous grid separation on the boundaries of the blocks, and constraining separated grids; initial constraint application and initial stress application are carried out on the block after grid separation; calculating to obtain an initial stable state of the block; carrying out equal-proportion gradual reduction on the strength parameters of the block structure surface, and adjusting the strength parameters corresponding to the rod piece units of the structure surface to obtain a block safety coefficient; and when the safety coefficient requirement specified by the specification is not met, the block is stabilized through a supporting measure, and the safety coefficient of the block after the supporting force is applied is analyzed. The limitation of a traditional method is overcome, and the simulation precision of the numerical model on the actual situation is improved. The current stable state of the block can be judged, and the safety of the block under different supporting measures can be evaluated.

The application discloses a numerical combination fast calculation method based on mutual exclusion group extreme value decomposition, which comprises the following steps: according to the physical mutual exclusion of load working conditions, all load working conditions are divided into M mutual exclusion groups; finite element analysis is carried out on all working conditions in each mutual exclusion group, the structural effect is calculated, the positive maximum value and the negative minimum value in the group are recorded respectively, and the working condition number corresponding to the effect is generated; based on multiple load types, all mutual exclusion groups are combined to obtain P mutual exclusion group combinations, the effect positive extreme value and the effect negative extreme value of each mutual exclusion group combination are calculated; the effect positive extreme value and the effect negative extreme value of the P mutual exclusion group combinations are enveloped to obtain the final positive extreme value and the final negative extreme value; the method in the application realizes that the calculation time is greatly shortened, the calculation complexity is reduced from an exponential order to a linear order, and only the extreme values and the numbers of the mutual exclusion groups need to be stored, so that the memory demand of a large project is sharply reduced.

The utility model relates to the technical field of airport earthwork filling, and particularly discloses a levelness-adjustable pithead positioning mechanism which comprises a pithead positioning ring, an annular positioning plate, a positioning pin and an adjusting bolt, the annular positioning plate is fixedly sleeved at the bottom of the outer side ring wall of the pithead positioning ring, a positioning hole and a threaded hole are arranged on the annular positioning plate, and the positioning pin is arranged in the positioning hole. The adjusting bolts are arranged in the threaded holes in a threaded connection and penetrating mode and abut against the ground in a matched mode, the adjusting bolts are used for adjusting the levelness of the annular positioning plate, and the positioning pins penetrate through the positioning holes to fix the annular positioning plate to the ground. According to the utility model, the levelness adjustment and stable fixation of the pithead positioning ring can be realized, the position of the pithead positioning ring can be ensured not to deviate or incline in the process of excavating a test pit in the pithead positioning ring to carry out a detection test of an irrigation method, the pithead positioning ring can be always ensured to be horizontally placed and fixed, and the working efficiency is improved. Therefore, the detection precision and the detection progress of the test are improved, and the test pit size meets specification requirements.

This invention discloses a toughened-self-healing composite modified No. 50 Grade A asphalt and its preparation method, belonging to the technical field of road engineering materials. The asphalt comprises the following raw materials: 100 parts of No. 50 Grade A road petroleum asphalt; 5.0-8.0 parts of functional monomer A; 1.0-4.0 parts of self-healing microcapsules; 0.04-0.112 parts of initiator; and 0.05-0.24 parts of crosslinking agent. The functional monomer A is composed of styrene and butyl acrylate in a mass ratio of 25:75-35:65. A one-step preparation method is used, where styrene and butyl acrylate are copolymerized in situ in the asphalt and lightly crosslinked to achieve toughening, while the introduction of self-healing microcapsules imparts a self-healing function. This invention improves the low-temperature ductility, high-temperature stability, storage stability, and damage self-healing ability of asphalt, and the process is simple and controllable, making it suitable for high-grade roads and heavy-duty traffic pavements.

The present invention provides a long-span suspension bridge with replaceable main cables, comprising a main cable, a cable tower, a stiffening beam and a sling, wherein the cable tower is located on both sides or in the middle of the bridge deck, the stiffening beam is a steel structure main beam, the main cable comprises an upper main cable and a lower main cable, the upper main cable is a single main cable, the lower main cable is two main cables with the same diameter, the sum of the cross-sectional areas of the two lower main cables is equal to the cross-sectional area of ​​the upper main cable, the upper main cable and the lower main cable have the same linear shape on the elevation, and are arranged in an isosceles triangle on the cross section, the sling comprises an upper sling and a lower sling, the upper sling connects the upper main cable and the stiffening beam, the lower sling connects the lower main cable and the stiffening beam, and the upper sling and the lower sling are arranged at equal intervals along the bridge direction. The present invention provides a long-span suspension bridge with replaceable main cables and a main cable replacement method thereof, wherein the upper main cable and the lower main cable are staggered in both the vertical and horizontal directions, so that the upper and lower main cables do not affect each other during the replacement process, and the replacement of the main cable is convenient.