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490results about How to "Improve standards" patented technology

Multi-state undisturbed soil column infiltration simulation system and unsaturated osmotic coefficient determination method

The invention provides a multi-state undisturbed soil column infiltration simulation system and an unsaturated osmotic coefficient determination method. The simulation system comprises a bottom member, one or more soil column experiment standard members which are connected onto the bottom member and a multi-strength rainfall infiltration device arranged at the top of the soil column experiment standard members; a soil filling member of the simulation system is composed of a plurality of standard members and is automatically controlled by a computer; the determination of a rainfall infiltration coefficient and an osmotic coefficient is realized based on the system and testing steps and a calculation method are provided; in a determination process, a large-diameter undisturbed soil column is used for an indoor experiment and the multi-strength rainfall infiltration device is used for simulating three types of strength rainfall infiltration boundary conditions, such as low-strength rainfall whole infiltration boundary condition, a middle-strength rainfall radial flowing infiltration boundary condition and a high-strength rainfall stable infiltration boundary condition; and the multi-state undisturbed soil column infiltration simulation system has the characteristics of strong practicability, good utilization effect and convenience for popularization and utilization.
Owner:XIAN UNIV OF SCI & TECH

High-performance superfine cement based grouting material for microfissuring and silty fine sand soil grouting treatment and application of grouting material

The invention discloses a high-performance superfine cement based grouting material for microfissuring and silty fine sand soil grouting treatment, and application of the grouting material. The grouting material comprises the following ingredients in parts by weight: 50-79 parts of Portland cement clinker, 19-48 parts of an auxiliary cementing material and 2-7 parts of desulfurized gypsum, whereinthe auxiliary cementing material comprises the following ingredients in parts by weight: 25-57 parts of mineral slag, 8-21 parts of steel slag, 18-36 parts of pulverized fuel ash, 6-12 parts of limestone flour, 1-8 parts of silica fume and 2.5-12.8 parts of a high-performance composite regulator; the high-performance composite regulator comprises the following ingredients in parts by weight: 5-16parts of sodium hydroxide, 4-12 parts of sodium silicate, 4-14 parts of potassium metaaluminate, 12-21 parts of calcium chloride, 11-18 parts of lithium chloride, 4-12 parts of triethanolamine, 21-27parts of alum, 18-29 parts of aluminum sulfate, 0.2-1.5 parts of hydroxypropyl methyl cellulose, 0.1-3.0 parts of viscous polymer, 0-0.8 parts of polypropylene fiber and 0.5-3.0 parts of a superplasticizer; and the viscous polymer is an acrylic ester polymer or an ethylene-vinyl acetate copolymer.
Owner:SHANDONG UNIV

Rainfall infiltration soil column simulation system and unsatured hydraulic conductivity determination method

The invention provides a rainfall infiltration soil column simulation system and an unsatured hydraulic conductivity determination method. The simulation system comprises a bottom structural element, one or several soil column experiment standardized structural elements which are connected to the bottom element and are connected in series connection, and an apparatus for simulating rainfalls of a plurality of forms at the top of the soil column experiment standardized structural elements; soil containing structural elements of the simulation system comprise a plurality of standard structural elements and are automatically controlled by a computer, and determination of rainfall infiltration coefficient and unsatured hydraulic conductivity can be realized based on the system; determination steps and computing methods are provided, undistributed soil column of large diameter is used for laboratory experiment during determination, devices for simulating rainfall of a plurality forms are used for simulating four kinds of hydraulic power boundary conditions, which comprise a low intensity rainfall full infiltration boundary condition, a middle intensity rainfall infiltration with runoff boundary condition, a high intensity rainfall stable infiltration boundary condition, and a snow melt infiltration boundary condition. The system and the method have the characteristics of good practicality, good usage effects, as well as promotion and usage convenience.
Owner:XIAN UNIV OF SCI & TECH

Method for generating electronic channel chart based on Changjiang River standards

The invention discloses a method for generating an electronic channel chart based on the Changjiang River standards, which is mainly based on the digital channel measurement data transmission standard of the Changjiang River, the digital channel measurement data verification standard of the Changjiang River and the electronic sea chart data protection scheme recommended by IHO (International Hydrography Organization), sets up a standardized electronic channel chart database of the Changjiang River by utilizing advanced computer network technology, data communication technology and geographic information processing technology, realizes the measurement and the management for channels over the Changjiang River, the generation of the electronic channel chart and the automation, integration and networking of the entire release process by means of the generation flow including data acquisition, data processing, editing of the channel chart, checking of the channel chart, release of the channel chart and application of the channel chart, and provide, in the form of browser, the latest electronic channel chart service for ships sailing on the Changjiang River, shipping related departmentsand enterprises and public institutions in time. The method has the obvious advantages of normative data format, complete data updating mechanism, mature business system, safe information protection mechanism, great advantage in popularization and the like.
Owner:长江南京航道局 +2

Automatic paving control system for paving machine

The invention discloses an automatic paving control system for a paving machine. The automatic paving control system for the paving machine comprises a paving machine automatic leveling system, a paving machine electric-control system, a longitudinal slope sensor, a transverse slope sensor, a scraper motor, a spiral distributing device motor and a vibrator. The automatic paving control system for the paving machine further comprises a center-control computer, a man-machine interaction device, a global positioning system (GPS), a data transmission system, a laser emitter, a laser scanner, an ultrasonic material level sensor, a speed sensor and an ultrasonic sensor. Relevant construction drawing technical parameters are input into the center-control computer, and the paving machine is controlled by the center-control computer through the data transmission system to complete the automatic paving process. The automatic paving control system for the paving machine is simple, convenient to use, applicable and capable of saving time and labor and greatly relieving labor intensity, automatic paving is achieved, inappropriateness of manual operation is reduced, manual misoperation is avoided, and accurate, continuous and standard automatic paving is achieved; high-efficiency, programmed, automatic and standard high-technology construction is completely achieved.
Owner:河南省路桥建设集团有限公司
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