290results about How to "Guarantee normal construction" patented technology

The invention belongs to the field of petroleum engineering and relates to a shale gas reservoir pre-fracture composite acid solution and its preparation method and application. The composite acid solution comprises the following components: Component a) at least one component of hydrochloric acid, hydrofluoric acid, fluorboric acid, phosphoric acid, formic acid and acetic acid; and Component b) a corrosion inhibitor, a discharge aiding agent, a ferric iron stabilizer and a clay stabilizer. The composite acid solution containing different acids is selected for different reservoirs. Rock core corrosion ratio is 25-30%. A certain rock core corrosion ratio is maintained, and borehole wall collapse caused by too high corrosion ratio is also prevented. The corrosion inhibitor, the discharge aiding agent, the ferric iron stabilizer and the clay stabilizer which are used as additives have good compatibility with acid. The composite acid solution provided by the invention has advantages of fast dissolving speed, uniform mixing, high corrosion inhibition efficiency, high surface activity, good clay stabilizing effect and wide range. Applicable temperature of the composite acid solution is 20-180 DEG C. by the use of the composite acid solution, normal construction of large-scale fracturing of long horizontal-section shale gas wells can be guaranteed under the condition of existing equipment capacity.

The invention relates to a fast and highly-efficient tunneling method for a large section of a hard-rock tunnel in a coal mine by combination of fully-mechanized tunneling and blasting driving. As shown in the figure 1, a cut hole with the borehole diameter of Phi 40.0 mm and a reliever hole with the charge diameter of Phi 35.0 mm are arranged in the section of the hard-rock tunnel with the protodyakonov coefficient f larger than 10.0 for digging out a groove cavity with s approximately equal to 14.0 m<2>. As shown in the figure 2, the cut hole adopts a three-stage oblique cut with stages deepening and angles of inclination increasing stage by stage. The consumption of charge in unit volume is determined based on the hard-rock protodyakonov coefficient and shot hole depth according to quantification of the figure 3. Three stages of oblique cuts respectively select I, III, IV-section millisecond delay detonators. A V-section millisecond delay detonator is selected by the reliever hole. The oblique cuts and the whole section of the reliever hole are detonated once with the total delay time no more than 130.0ms. After the groove cavity is formed in a blasting method. The reasonable tooth parameters are selected to rapidly expand the groove cavity to the design section and contour is finished under effect of a free surface of a fully-mechanized coal winning machine. Due to millisecond delay detonation of the oblique cut in three stages and larger borehole diameter, stemming is blocked to increase so that rocks do not affect the fully-mechanized coal winning machine after the working surface during the throwing process. The safe and efficient effect can be achieved.

The invention discloses a method for blocking underground water, and belongs to the field of building operations. The method comprises the steps that geologic structures of water burst sections and water discharging characteristics of water burst points are obtained; according to the obtained geologic structures of the water burst sections and the obtained water discharging characteristics of the water burst points, split-flow pressure relief vents are distributed in the water discharging points of which the single points are greater than a first preset value; according to the obtained geologic structures of the water burst sections and the obtained water discharging characteristics of the water burst points, grouting and water blocking holes are distributed in the water discharging points of which the single points are smaller than a second preset value. By the adoption of the technology of reasonable design, simple process and easy construction, selective water blocking penetrating through high-pressure and large-flow rich water areas in tunnels and underground constructions can be achieved, and normal construction of the tunnels and the underground constructions is ensured.

The present invention relates to the intelligent control technology of engineering machines, construction machines and building machines. The distributive hierarchy intelligent tree control mode of asphalt concrete road constructing machinery includes four control unit of central intelligent control, intelligent mixing control, intelligent spreading control and intelligent densifying control. The central intelligent control controls the other control units and the transport system, the intelligent mixing control unit controls the production of intelligent loaders and intelligent stirrers and the transport of dumpers, the intelligent spreading control unit controls the dumpers and the intelligent spreaders to complete the spreading job, and the intelligent densifying control unit controls the intelligent road roller to complete the rolling job. The present invention has the advantages of dispersed intelligence, power error tolerance, high reliability and high construction quality.

The invention discloses a method for excavating a weak surrounding rock tunnel under water-rich high-ground-stress conditions. The method includes the following steps that firstly, advanced small pipe grouting and pre-supporting are carried out in advance before tunnel excavation; secondly, excavation is carried out according to a three-step seven-excavation-surface method; thirdly, C35 reinforced concrete is adopted in the secondary lining process, wherein the C35 reinforced concrete is 65cm in inverted arch thickness and 55cm in arch wall thickness and comprises phi22@20cm annular main ribs, phi14@20cm longitudinal steel ribs and phi8 stirrups. The method can effectively avoid the steel frame torsion and cracking phenomenon, thereby guaranteeing normal tunnel construction, accelerating construction and improving construction safety and engineering quality.

The invention relates to a reverse drainage treatment method during the construction period of a dam body of a high rock-fill dam provided with a concrete panel, which is a drainage method for treating dam body construction waste water and underground leaked water during the construction period of the high rock-fill dam provided with the concrete panel by combination of the prior drainage and toe board and wide slot drainage. The method comprises the following steps: firstly, as for the dam body construction waste water and the underground leaked water below the elevation on the top of a flow measurement weir on the rear of the dam, reinforced gabions are used for arranging a temporary collecting well and a drainage pipe inside a rock-fill before the dam for drainage, that is the reverse drainage treatment method is performed; and secondly, as for the dam body construction waste water and the underground leaked water on the elevation on the top of the flow measurement weir on the rear of the dam, drainage is still performed by adopting the prior flow measurement weir on the rear of the dam. The method breaks through the treatment range of reversely leaked water in the dam body during the construction period of the rock-fill dam covered by the DL/T5128-2001 construction specifications of the Construction Specifications for the Rock-fill Dam Provided with a Concrete Panel, solves the problem of drainage of the leaked water in the dam body in the construction process of the high rock-fill dam, and particularly guarantees the safety of construction of the concrete panel.

The invention relates to a support vector machine-based mine fiber grating monitoring system missing data compensation method and belongs to the monitoring system missing data compensation method. The method includes the following steps that: step 1, a mine fiber grating monitoring system data sensing device performs data acquisition; step 2: monitoring data collected by the fiber grating sensing device are represented by time sequences and are preprocessed; step 3, the kernel function of a support vector machine is selected and constructed; step 4, the hyper-parameters of the support vector machine are selected and determined; step 5, a kernel matrix is built according to the determined kernel function, a loss function and penalty parameters, an optimization algorithm is adopted to get the optimal parameter value of the support vector machine; and step 6, the regression function model of the support vector machine is established, fitting regression analysis is performed on the data, so that the compensation result of missing data is obtained, and compensation work for the missing data is performed. With the support vector machine-based mine fiber grating monitoring system missing data compensation method of the invention adopted, the monitoring missing data can be compensated, and therefore, the monitoring data can be improved, and the data are closer to real and reliable data, and the safety production, construction and stability of a mine can be ensured.

The invention provides an offshore wind power plant electronic fence and acousto-optic early warning equipment, which at least comprises: electronic fence corollary equipment for establishing a virtual electronic fence in an offshore wind power plant and an electronic fence for construction ship patrol; and early warning equipment that performs early warning according to the target entering the electronic fences. Sensors such as radar, AIS, CCTV and the like are used for acquiring field information; all-around monitoring is achieved, and timely early warning is achieved through acousto-optic warning equipment when a ship intrudes into a wind power early warning area; compared with a real wind power water area warning sign, a navigation water area is not occupied, visual lookout is not affected, and the problems that the real warning sign is large in installation and construction difficulty, high in cost, difficult to maintain and the like are solved. The AIS, radar, CCTV, VHF and otherdevices are linked and subjected to information fusion, all mistakenly-entering ships can be effectively captured, early warned, called and expelled through the arrangement, and ship navigation safety and offshore wind power plant construction and operation safety are effectively guaranteed.

The present invention belongs to the field of building engineering and features the longitudinal position limitation ofmuff jointed prestressed steel cable mainly. Pipe section joint rigidity is first determined based on foundation conditions; pipe section anti-seismic performance is analyzed based on the joint rigidity, and the joint form and the construction process are further determined. It has the features of simple structure for in-situ installation, flexible steel rope, no joint leakage, anticorrosive steel rope; and waterproof and anti-seismic performance, maintained even in fire.

The invention discloses a durable tunnel paving structure, which sequentially comprises a rubber asphalt gravel sealing layer, a pouring-type semi-flexible mixture paving lower layer, a modified emulsified asphalt bonding layer and a high-modulus warm mixing flame-retardant asphalt mixture paving upper layer from bottom to top. The durable tunnel paving structure provided by the invention has the advantages that the anti-track capability and anti-crack performance of the pavement are obviously enhanced; the durability is greatly improved; the anti-slip function of the paving surface is ensured; the problem of potential fire safety hazards of asphalt pavement is solved; the asphalt pavement construction temperature is lowered; energy sources are saved; emission is reduced; the construction simplicity is improved; only the surface maintenance and repair are needed in daily life; the integral repeated repair is avoided; and the investment is reduced in the whole life cycle.

The invention discloses an intelligent construction system of a stiffness composite pile. The intelligent construction system comprises a stiffness composite pile machine and an intelligent control system for controlling working of the stiffness composite pile machine; the stiffness composite pile machine comprises a stirring pile machine body, a feeder supplying materials to the stirring pile machine body and a pile-sinking machine body, a static sounding head and a rotary type soil sampler are installed on a stirring shaft of the stirring pile machine body, and a satellite position instrument is additionally installed on the pile machine. According to the intelligent construction system of the stiffness composite pile, by analyzing the motor current, a static sounding result and a sampling result, mastering the actual soil texture condition and the pile-forming quality condition in real time and controlling a main machine, the construction parameters of the feeder and the pile machine can be adjusted in time; and through datum displaying of a cloud platform managing system, construction of the stiffness composite pile is ensured to be handled in the whole process by all engineering participants, and the construction quality is effectively improved.

The invention provides a pre-stressed duct grouting agent which has the characteristics of high fluidity, bleeding prevention and the like. The pre-stressed duct grouting agent comprises the following components: 2 to 10 percent of a water reducing agent, 0.1 to 10 percent of a viscosity modifying agent, 0 to 1 percent of a defoaming agent, and 35 to 78 percent of a coagulation time regulating agent; the coagulation time regulating agent comprises the following components: 28 to 52 percent of clinker, 42 to 68 percent of plaster, 4 to 30 percent of fillers, and 0 to 3 percent of a coagulation accelerator. The invention further provides a preparation method and an application method of the pre-stressed duct grouting agent. The invention has the advantages that the pre-stressed duct grouting agent contains the cement coagulation time regulating agent, so that the coagulation time of a cement-based composite material can be regulated based on external temperature changes to guarantee the normal use and normal strength growth of the cement-based composite material; meanwhile, the cement-based composite material achieves micro-expansion at the later stage due to the addition of the cement coagulation time regulating agent.

The invention relates to a storable emulsified asphalt cold-patch mixture and a preparation method and application thereof. The storable emulsified asphalt cold-patch mixture consists of the following components in percentage by weight: 7 to 8 percent of emulsified asphalt, 5 to 6 percent of water, 1 to 2 percent of reinforcing agent, 1 to 3 percent of thixotropic agent and the balance of stone, wherein the emulsified asphalt consists of the following components in percentage by weight: 1.0 to 1.5 percent of emulsifying agent, 1 to 3 percent of thickening agent, 26.5 to 36.5 percent of water and the balance of No.70 asphalt. The storable emulsified asphalt cold-patch mixture has the advantages of convenience of manufacture, long storage time, no environmental pollution, convenience of construction, capacity of opening the traffic after construction and the like, and is suitable for repairing pot holes of asphalt pavements.

A cable laying rolling support rack comprises a pedestal, the bottom portion of the pedestal is provided with universal wheels, the pedestal is provided with a motor reducing gear and a frame locatedat the left side of the motor reducing gear and arranged in a vertical direction, the left side of the frame is provided with a slide rail in the vertical direction, the slide rail is slidingly connected with a slide block, the output shaft of the motor reducing gear is connected with the slide block through a chain transmission mechanism, the left side of the slide block is fixedly connected witha guide wheel module configured to support a cable, and the motor reducing gear is provided with a brake configured to brake an output shaft. The present invention further discloses an operation method of a cable laying rolling support rack. The cable laying rolling support rack and the construction method used for cable laying is reasonable in design, simple in structure, light in weight, smallin size and convenient to operate and can perform movement and location in a cable duct so as to fully reduce the labor intensity, have high safety and reliability, greatly improve the cable laying quality and greatly shorten the construction period.

The composition of the invented acidization blocking remover liquor comprises (wt%) 3%-20% of industrial nitric acid, 0.8%-1.2% of nitric acid acidization additive and the rest is water, and the nitric acid acidization additive is formed from metal corrosion inhibitor and surfactant. Said invention can completely eliminate the near-well-bore area block of wall injection well, and has the characteristics of slow oil pipe corrosion speed, high nitric acid effective concentration, easy preparation and low cost.

The invention provides a sampling device for geotechnical engineering investigation, which comprises a box body, a sampling drill bit, a driving mechanism, a depth measuring mechanism and a water suction pump, the box body is divided into a working cavity and a sampling cavity, and the depth measuring mechanism comprises an annular plate, a transmitting pipe and a receiving pipe; before sampling,the depth of to-be-sampled soil is judged according to a to-be-constructed geotechnical engineering structure, after the device body is moved to a to-be-sampled area, water in the sampling cavity is pumped away through the water pump, then the driving mechanism drives the sampling drill bit to be inserted into the soil, and the annular plate arranged on the outer wall of the sampling drill bit canbe blocked on the surface of the soil; the distance between a transmitting tube and the receiving tube is increased, the height between the annular plate and the soil surface can be obtained according to the infrared light transmitting time of the transmitting tube and the infrared light receiving time of the receiving tube, and therefore the depth of the sampling drill bit inserted into soil canbe obtained, and sampling can be conducted after the sampling drill bit reaches the preset depth. And the sampled soil sample can correctly reflect the properties of the base layer.

The invention relates to a method for cooling peripheral frozen earth and preventing water catchment in an excavation pit for a permafrost region. The method is characterized in that a pit slot is excavated at a position which is 0.5-5 m far away from the rim of the designed pit; the slot depth is a depth being 0-100 cm below underground permafrost table; a cooling pipe is paved at the bottom of the pit slot; a waterproof film is paved on the cooling pipe, the bottom of the slot, and the wall of the pit to a ground surface, and refilled and punned with filled earth; and the cooling pipe injected with circular freezing liquid is connected with a refrigerator on the ground surface through a hose. Shown by practices, with the adoption of the method provided by the invention, the problems of melting and stability loss of the frozen earth and the frozen earth in the excavation pit in a warms-season construction process and water leakage and water collection of underground water can be solved through the effective combination of refrigeration and water insulation, so that the permafrost stability can be effectively protected, and the normal construction and the long-term stability of the Qinghai-Tibet direct-current networking engineering in the permafrost region can be ensured.

The embodiment of the invention discloses an employee demission risk prediction method, apparatus and device, and a readable storage medium. The method comprises the steps of constructing an enterprise employee information database; constructing an enterprise on-job employee portrait system according to the enterprise employee information database; constructing an enterprise demission employee portrait system according to the enterprise employee information database; constructing a recruitment information system; and training an employee demission risk prediction model according to the enterprise in-service employee portrait system, the enterprise demission employee portrait system and the recruitment information system to obtain an employee demission probability. According to the embodiment of the invention, the employee demission risk can be dynamically predicted in real time in the use process, early warning is sent to a manager in advance for the talent with the demission risk, a talent demission problem solving diagnosis method is given, and the construction of an enterprise talent team and talent-related cultivation can be better guaranteed.

The invention discloses a mortar leakage repair method for damage of a hinged seal structure based on a shield machine, and the mortar leakage repair method comprises the following steps: step 1, forming an isolation layer; step 2, mounting a packing; step 3, mounting a shield tail prolonged steel plate; step 4, mounting a seal strip; step 5, mounting a spacing assembly; and step 6, filling grease. The mortar leakage repair method disclosed by the invention has simple steps, the hinged seal structure of the shield machine is sealed through a first supplementary seal ring, a second supplementary seal ring and a grease seal layer, so the airtightness is better as compared with the existing blocking mode by using packings, cotton yarns and other materials, and simultaneously, compared with the existing mode of dismantling a thrust oil cylinder and other components in the shield machine for replacing the hinged seal structure, the mortar leakage repair method has convenient operation, small risk in construction, low cost and short construction cycle.

The invention discloses a method for preparing a copper ion selective adsorbent by sodium alginate/chitosan compounding. The method comprises the following steps of firstly preparing a copper alginatepellet, afterwards, compounding the copper alginate pellet with chitosan, next, carrying out aldehyde pre-cross-linking and epoxy chloropropane cross-linking on a copper alginate/chitosan composite pellet, and finally eluting a copper ion by using hydrochloric acid to obtain the copper ion selective adsorbent. According to the method, the copper ion is used as a curing agent of sodium alginate and a template of ionic imprinting; a calcium ion is not added in a whole course; the construction of an imprinting site of the copper ion is ensured; the stepwise cross-linking is carried out on the composite pellet by adopting different cross-linking agents; the cross-linked structure is optimized; the recognizability of the imprinting site to the copper ion is enhanced; the selectivity of the adsorbent to the copper ion is improved. The method is wide in raw-material source, simple in preparation process and lower in production cost, and the adsorbent prepared by the method provided by the invention is high in adsorption quantity to the copper ion and good in selectivity, can be repeatedly recycled, moreover, is environmentally friendly, and has wide development and application prospects.

The invention relates to the technical field of detection and evaluation authentication, and provides a making method for simulated hole defects of a nuclear safety three-level HDPE pipeline. The method comprises the steps of S1, selecting a test pipeline, and acquiring a backfilling amount L at a pipeline defect after the test pipeline is welded; S2, selecting a simulated pipeline, and marking out a plurality of positions used for making the simulated hole defects on the simulated pipeline; S3, drilling the marked positions to obtain simulated holes, wherein the depth of each simulated hole is larger than the backfilling amount L; and S4, mutually welding one ends, with the simulated holes, of two simulated pipelines, or welding one end, with the simulated holes, of the simulated pipelinewith a normal pipeline to form a simulated joint with the hole defects. When an ultrasonic nondestructive detection method is adopted, the sizes and positions of the hole defects in the simulated joint can be accurately detected out, so that the detection precision of the detection method is high; and therefore, the hole defects in the pipeline joint in construction can be accurately detected out, and the construction of the HDPE pipeline has the advantages of quality guarantee and high safety.

The invention relates to a construction method of a single-pipe grouting bottom-expanding cast-in-place pile, and belongs to the field of cast-in-place piles. The construction method comprises the following steps that 1, a spiral pile machine is used for drilling a foundation to form a pile hole, meanwhile, wall protection slurry is poured, after a drill bit reaches a preset position, a drill rodis lifted, the bottom of the pile hole is expanded, and a pile bottom expanding part is formed; 2, the pile hole is cleaned; 3, a reinforcement cage is placed into the pile hole, and the bottom of thereinforcement cage is inserted into the pile bottom expanding part; 4, a first guide mechanism and a second guide mechanism are installed at the position, close to the pile hole, of the ground and the top of the reinforcement cage correspondingly, and a pouring guide pipe is inserted into the pile hole through the first guide mechanism and the second guide mechanism; and 5, a concrete pump is connected to the top of the pouring guide pipe, and pile forming concrete slurry is poured into the pouring guide pipe. The construction method has the effect of keeping the pouring guide pipe stable when being put down.

The invention discloses a roadbed protective system in a debris flow gully and an implementation method for the roadbed protective system, and the roadbed protective system is arranged along the debris flow gully (7). The roadbed protective system comprises a blocking dam (2), a stop and deposit field (3), a drainage guide culvert (4) and an energy dissipation slot (5), wherein the blocking dam (2) is positioned in an upstream channel of the debris flow gully (7); the stop and deposit field (3) is positioned between the blocking dam (2) and a roadbed filling body (1) arranged at the downstream; an inlet of the drainage guide culvert (4) is mutually jointed with the stop and deposit field (3); the drainage guide culvert (4) transversely penetrates through the roadbed filling body (1); and a downstream slope surface at the outlet of the drainage guide culvert (4) is jointed with the energy dissipation slot (5). The roadbed protective system overcomes the defects that a drainage guide structure in the prior art is easily damaged and finally causes the roadbed to be destroyed by rush of water, and has the advantages of reducing scouring, on the both sides of the channel, of debris flow, and prevents most of rock blocks from discharging.

The invention provides a high-performance cold patch asphalt mixture and a preparation method thereof. The high-performance cold patch asphalt mixture is prepared from the following components in parts by mass: 100 parts of aggregate, 2.5-3.5 parts of mineral powder and 4.5-5.5 parts of a cold patch asphalt liquid. The preparation method comprises the following steps: preparing an additive from a coumarone resin, a terpene resin and an ethylene-vinyl acetate copolymer according to a formula; selecting matrix asphalt, a diluent and the additive according to a mass ratio of 100: (22-25): (6-8), heating the matrix asphalt, adding the diluent, dispersing under a high-speed dispersion instrument, cooling, adding the additive, and dispersing to obtain a cold patch asphalt liquid; and selecting and weighing aggregate, mineral powder and the cold patch asphalt liquid according to the mass parts, carrying out heat preservation development at different temperatures respectively, putting into a mixing pot, and mixing to obtain the cold patch asphalt mixture. According to the high-performance cold patch asphalt mixture provided by the invention, the storage stability, the construction workability, the Marshall stability, the water stability and the adhesive property of the cold patch asphalt mixture can be remarkably improved, and the purpose of prolonging the service life of the cold patch asphalt mixture is achieved.