330results about How to "Improve engineering efficiency" patented technology

According to the present invention, a steel structure integral hoisting method based on BIM comprises: calculating member deflection by using BIM software, determining an arching degree of a single truss, checking member deflection in construction, comparing the member deflection in construction with a pre-arching degree, and comparing a deflection degree after loading that follows completion of construction with designed control deflection degree requirements; using an MIDAS finite element analysis plug-in to set hoisting points at intersection of an upper chord and a diagonal web member on the truss and on each truss, performing design calculations of lifting lugs, and analyzing displacement of structurally critical nodes; performing manual or automatic layout on the integral steel truss, steel tubes and steel cables in a venue model, performing integral analysis on the steel truss of the steel structure, calculating pre-stress of each node of the integral structure by using the BIM software; finally, virtually adding an environment and roads of a construction site by using the BIM software, completing stimulation of a whole erection process, determining the installation time and the situation of occupying construction roads of each steel truss, and estimating construction completion time. The present invention solves the construction problem of limited space, reduces the construction cost and shorten the construction period.

The invention provides a mineral aggregate gradation optimization method based on the mineral aggregate void rate. The method comprises the following steps that 1, mineral aggregates are screened to obtain classification mineral aggregates of various different grain diameter sizes; 2, the mass of each mineral aggregate obtained in the first step is converted into volume on the basis of the percentage; 3, iterative computation is performed to obtain the void rate of the mixed mineral aggregates; 4, the mineral aggregate gradation is optimized according to the void rate of the mixed aggregates. According to the mineral aggregate gradation optimization method, engineering practice is fully considered, and the mineral aggregate void rate can be reasonably estimated and gradation optimization can be performed on the premise that mixed aggregate test pieces are not compacted in the earlier stage, so that workloads and blindness of the mix proportion design stage are greatly lowered, and the engineering efficiency is remarkably improved.

The invention provides a bolt ball welding ball mixed node large span cantilever grid structure construction method. The method comprises the steps that 1 a bolt ball welding ball mixed node space grid cell, namely the size and structure of a middle-size cell grid are determined according to the design; 2 a ground assembly moulding bed is arranged; 3 ground assembling is conducted on the middle-size cell grid; 4 coating and numbering are conducted on the middle-size cell grid; 5 a lifting point of the middle-size cell grid is determined and support profile steel is added; 6 a steel wire rope used for lifting and a chain block are arranged, and trying of lifting is conducted; 7 the middle-size cell grid is lifted and installed. The construction period can be greatly shortened, the using amount of construction revolving materials is reduced, the construction efficiency is improved, the safe hidden trouble brought by high altitude construction of constructors can be reduced at the same time, and meanwhile the special requirements on loading, span, forms and the like of a large-scale building grid structure can be met conveniently.

Movable reaction equipment for a shield launching shaft comprises a girder provided with a rectangular frame, wherein the girder is perpendicularly placed on a track of a launching bracket in the shield launching shaft, and the front side of the girder is connected with a reference steel ring through welding, the back side of the girder is connected with a flange at the front end of a horizontal support tube, a flange at the back end of the horizontal support tube is closely attached to a pushing back wall of the shield launching shaft, the horizontal support tube is formed by flanged connection of one section of steel tube or at least two sections of steel tubes, and the length of each steel tube is smaller than the travel of a shield machine jack; and the front side of an embedded support piece on a bottom plate of the shield launching shaft is in threaded connection with the tail of an anti-reverse jack. The equipment is low in construction cost, simple and convenient to construct, high in construction efficiency, short in construction period and low in risk when being used for performing launching construction of the shield launching shaft.

The invention discloses a joint for connecting a buckling-restrained brace, a concrete beam and a concrete column; an anchoring part anchored in the concrete beam and the concrete column is composed of two groups of spaced H-shaped profile steels; the H-shaped profile steels and an anchoring plate are welded into a whole one; the internal edge of the anchoring plate id arranged at the external sides of the concrete beam and the concrete column; a joint plate is integrally welded with the anchoring plate; the external end of the anchoring plate integrally welded with the joint plate is lengthened to be longer than the lateral side of the joint plate; and bolt holes for fixing the buckling-restrained brace are formed on the joint plate. The H-shaped profile steels in the joint plate have good stability in a plane and high rigidness and are not easy in instability; the profile steels have big welded areas with the anchoring plate and are not easy to produce pulling / pushing damage; the profile steels have big contact and load-transfer areas with the concrete and are capable of uniformly dispersing the load to the concrete beam; the lengthened parts at two ends of the anchoring plate are capable of effectively avoiding direct extrusion between the joint plate and the concrete, so that the stress concentration is relieved and the service life of the joint is prolonged; the integrality of the concrete beam and the concrete column is not influenced, so that hoops and longitudinal ribs in the concrete beam can be arranged easily; the steel ratio in the joint area of the beam and the column is increased and the strength and rigidness of the joint is improved by the plastic deformation of the beam restrained by the anchoring plate; the whole component can be manufactured in a factory and the construction time is saved.

The invention discloses an RTK algorithm for correcting a tropospheric empirical model by using real test meteorological parameters. The method comprises the following steps: step 1, storing an observation value of a reference station and actually measured meteorological elements of the observation value in real time; 2, selecting a global troposphere empirical model, and calculating zenith troposphere delay; 3, establishing the relationship between evelation, a global empirical model ZTD and a meteorological elements ZTD; 4, correcting the global empirical model ZTD of the reference station and the moving station by using the correction model, and obtaining a reference station observation value correction amount by solving the difference between the two models; and 5, correcting the reference station observation value by utilizing the reference station observation value correction amount, broadcasting the corrected reference observation value to the moving station, and carrying out double-difference RTK calculation by the moving station to obtain a three-dimensional coordinate of the moving station. The method has the advantage that the RTK service positioning precision and reliability are improved. The invention further discloses a continuous operation base station service system suitable for the special environment.

The invention relates to the technical field of the rail construction engineering, in particular to a method for adjusting control benchmark point of a rail by means of approximate adjustment. The method is characterized in that two ends of a point to be determined are added into a known traverse point to form an echoed lead according to a point to be determined of a known point lofting control benchmark point, an actual-measurement corner and side relationship and a theoretical corner and side relationship of the echoed lead are compared, the position of each point to be determined is regulated, so that a point location error of the point to be determined falls within the required range, and therefore, the point to be determined is determined as a control benchmark point. According to the method disclosed by the invention, all control benchmark points are related to form a new rail control lead, manual errors in the lofting process are regulated, the precision of a rail control point is improved so as to improve the accuracy of a rail control benchmark and the rail status quality, so that a train can stably and quickly operate, the method is simple to operate, high in precision and high in engineering efficiency, can be completely applied to the rail traffic engineering construction, and is safe and reliable.

The invention discloses a multi-port multi-mode IoT communication terminal supporting multi-meter combined reading and a reading method thereof. A wireless communication unit and a data acquisition unit of the communication terminal are respectively connected to a data processing unit; a configuration interface is respectively connected to the wireless communication unit, the data processing unitand the data acquisition unit through a configuration unit; one end of an RS485 interface and / or an RS232 interface is connected to the data acquisition unit, and the other end is used for connectinga plurality of meters; the wireless communication unit includes a LoRa wireless communication subunit and / or a NB-IoT wireless communication subunit and / or a WIFI wireless communication subunit and / ora GPRS communication subunit. The terminal has the advantage that different types and different protocols of sensor or meter reading data are connected to a wireless network in different modes quickly by configuring the multi-port multi-mode IoT communication terminal, thereby reducing the research and development cost, improving the transformation efficiency of the old equipment and reducing theconstruction quantity.

The invention discloses a structure and method for installing a perpendicularity sensor on an ultralong tubular pillar. The structure comprises a laser gradiograph, a coarse adjusting bolt assembly, a fine adjusting bolt assembly, a light target, an installing bottom plate, an adjusting plate and a right-angle bent plate, and the perpendicularity sensor and a laser transmitter are arranged in the laser gradiograph. The perpendicularity sensor can measure the included angle between a measuring datum line and a natural vertical line. The laser of the laser transmitter is parallel to the measuring datum line of the perpendicularity sensor. The position of the adjusting plate is adjusted through the coarse adjusting bolt assembly and the fine adjusting bolt assembly so that when the light target is installed on different datum lines, the position of the laser on the laser target cannot be changed, and the laser transmitted after the laser gradiograph is installed and fixed is parallel to the axis of the tubular pillar. The problem of installing and positioning of the perpendicularity sensor on the ultralong tubular pillar is solved, it is ensured that the laser transmitted by the laser gradiograph is parallel to the axis of the tubular pillar, the measuring precision of the laser gradiograph is guaranteed, and the perpendicularity adjusting construction of the tubular pillar is more convenient and accurate.

The invention discloses a tunnel supporting formwork for civil engineering. The tunnel supporting formwork comprises a supporting plate, wherein a supporting column is fixedly connected to the supporting plate; a beam frame is fixedly connected to the supporting column; a base is arranged below the supporting plate; and a first lifting mechanism is arranged between the supporting plate and the base. The tunnel supporting formwork further comprises a frame body positioned above the beam frame, and a second lifting mechanism is arranged between the frame body and the supporting plate or the beamframe. The tunnel supporting formwork for civil engineering aims at solving the problem that in the prior art, a tunnel construction supporting device cannot be adjusted according to the heights of different tunnels, and the purposes that the heights of the different tunnels are adjusted, moving is convenient, the time needed by transferring of constructors is shortened, and the engineering efficiency is improved are achieved.

The invention discloses a detachable autorotation type drilling pipe pile. The detachable autorotation type drilling pipe pile comprises a pipe pile body, a movable joint, a drill rod, and a drill bit, wherein the pipe pile is of a hollow structure; the movable joint is slidably arranged on a traction guide pipe in a sliding mode, the lower end of the movable joint is fixedly connected with a traction wire, and the movable joint is arranged in the pipe pile body and can move up and down in the pipe pile body; the drill rod is fixedly connected with the lower end of the movable joint and located in the pipe pile; the drill bit is arranged at the bottom of the drill rod and is connected with a driving mechanism, and the drill bit is driven to rotate through the driving mechanism; the drill bit comprises a mechanical drill bit body and a plurality of high-pressure water jet nozzles; the multiple high-pressure water jet nozzles are arranged on the mechanical drill bit body; and the multiple high-pressure water jet nozzles are arranged in different inclination directions. According to the detachable autorotation type drilling pipe pile, the problem that it is difficult for the pipe pileto penetrate into a rock stratum during the pile sinking construction process is solved; damage of a pile body caused in the pile sinking process is reduced; the soil plug effect of the pipe pile inthe pile sinking process is reduced; and the construction is convenient and simple and convenient to implement.

The present invention discloses a three-dimensional geological raster body model construction method, and belongs to the field of constructing three-dimensional geological body models. The three-dimensional geological raster body model construction method disclosed by the present invention has a particular procedure that comprises the following ten steps: determining a standard project plane range; rasterizing a standard rectangle region G; calculating an earth-surface triangulation net and an underground triangulation net of the standard rectangle region G; calculating a unit grid calculation line and a grid line of the standard rectangle region G; equidistantly dividing an auxiliary line and the calculation line; calculating geological attributes of discrete points; establishing a correspondence relationship between a calculation point and an auxiliary point; constructing three-dimensional geological raster unit bodies; classifying the unit bodies; and combining the unit bodies according to calculation information and position information of the unit bodies. A space is dispersed into a series of points, and the geological attributes of the points are calculated, and then association between the points is analyzed, and thus spatial geometrical bodies where the discrete points are located are combined, so that an overall geological distribution condition of the space is calculated, and the goals of high precision, little space limitation, high efficiency and strong applicability can be achieved.

The invention discloses a high-precision analog to digital conversion method and device based on a double-path combination analog to digital converter. The method includes the following steps that an original digital signal is separated into a precision loss part signal and a precision retention part signal, the precision loss part signal is amplified by appointed times and then transmitted to a low channel of the double-path combination analog to digital converter, and the precision retention part signal is output to a high channel of the double-path combination analog to digital converter; a preset threshold value is larger than the resolution ratio of the double-path combination analogy to digital converter; an analog signal output by the low channel of the double-path combination digital-analog converter is shrunk by appointed times, then summation is performed on an analog signal output by the high channel of the double-path analog to digital, and then the analog signal is output; the device comprises a signal separating unit, an amplifying unit, the double-path analog to digital to digital converter and a weighting and summing circuit. The high-precision digital-analog conversion method and device have the advantages of being in conversion precision, easy to achieve, reliable in conversion, low in implementation cost and low in requirement for the digital-to-analog converter.