11093 results about "Pipe" patented technology

The invention discloses a setup spring self-recovery energy dissipation brace in the technical field of self-recovery energy dissipation braces. The brace comprises an inner pipe, an outer pipe, a spring, a spring baffle and a guide block; the inner pipe comprises a left inner pipe, a right inner pipe, a first steel pipe, a first steel pipe left baffle, a first steel pipe right baffle, an inner pipe left stopper, an inner pipe right stopper, an inner pipe outer friction plate, a high-strength bolt and an inner pipe connecting plate; the outer pipe comprises a left outer pipe, a right outer pipe, a second steel pipe, an outer pipe left baffle, an outer pipe right baffle, an outer pipe internal left stopper, an outer pipe internal right stopper, an outer pipe inner friction plate and an outer pipe connecting plate; the spring comprises a first spring and a second spring, wherein the first spring is sleeved outside the left inner pipe, and the second spring is sleeved outside the right inner pipe; two ends of the spring are connected with the spring baffle. The brace has the advantages that residual deformation of a structure is decreased, the brace is convenient to construct and easy to maintain and replace after earthquake action, and normal usage state affecting time is shortened.

The invention discloses a telescopic copper pipe component which comprises an inner pipe and an outer sleeve. The outer sleeve is sleeved on the inner pipe. A inner pipe through hole is formed in the center of the inner pipe. A plurality of linear grooves parallel with the central line of the inner tube are evenly distributed on the outer periphery of the inner pipe. Protrusions are disposed on the inner wall of the inner hole of the outer sleeve. The protrusions are disposed in the grooves. By the structure, when the outer sleeve is sleeved on the inner pipe, the protrusions can move linearly along the grooves, and the outer sleeve can move along the inner pipe. In addition, annular grooves are evenly formed in the outer periphery of the inner pipe, and the central line of each annular groove coincides with that of the inner pipe. When the protrusions enter the annular grooves, the outer sleeve can be relatively locked with the inner pipe by rotating the outer sleeve. The telescopic copper pipe is simple in structure and practical.

The invention discloses a drilling-sealing method and a sealing device of a coal mine underground ultrahigh pressure fracturing hole. The drilling-sealing method comprises the following steps: drilling a plugging hole on coal rock body; going on drilling a fracturing hole forward in the plugging hole; transmitting the sealing device into the plugging hole, enabling a water outlet hole of a fracturing pipe to stretch into the fracturing hole and enabling a taper sleeve sleeved on the fracturing pipe and made of soft material to plug on a hole opening of the fracturing hole; sealing by using polyurethane and solidifying for 30 minutes for 1 m length section at the hole opening of the plugging hole; and grouting cement slurry greater than 425 into the plugging hole with pressure by a grouting pipe, and solidifying for 48 hours after finishing grouting. The device comprises a grouting pipe and a slurry returning pipe and a fracturing pipe. The grouting pipe and the slurry returning pipe are arranged in the plugging hole. The grouting pipe, the slurry returning pipe and the fracturing pipe are connected integrally. A soft taper sleeve is arranged on the fracturing pipe. The soft taper sleeve is plugged at the hole opening of the fracturing hole. The invention has the advantages that the sealing method has high sealing success rate, good effect and wide application range; and the sealing device has simple structure and convenient operation.

The invention relates to a wide and thick steel plate for hot-bent elbow pipes at X65-X80 levels and a manufacturing method of the wide and thick steel plate. Especially, proper ingredients, structures and technologies for the steel plate for the elbow pipes at X65, X70 and X80 levels are designed respectively according to different pipe bending technologies of pipe bending factories, and the pipeline steel performance requirement for reaching the related strength levels after hot bending of the pipes is met. The steel plate is 20-40 mm thick and 2,500-4,000 mm wide, the hot-rolled steel plate with excellent toughness, thermal formability and thermal stability is obtained, a solution is provided for steel plates for high-pressure elbow pipes in long delivery pipeline projects, and the usage security of the high-level pipeline steel plate is improved.

The invention relates to a detection sorting device for steel balls The detection sorting device comprises a rack, a feed mechanism, an unfolding mechanism, a stock stop, a detecting mechanism, a sorting mechanism and a material collecting mechanism, wherein the feed mechanism comprises a material storing box, a material discharging hopper and a material discharging pipe; the unfolding mechanism comprises a material transporting guide rail, the material transporting guide rail is a V-shaped linear guide rail, the material discharging hopper is connected with an initiating end of the material transporting guide rail through the material discharging pipe, and the detecting mechanism comprises a light source assembly and a camera assembly; the light source assembly is arranged on the material transporting guide rail in a sleeved mode, the sorting mechanism and the material collecting mechanism are arranged on the tail end of the material transporting guide rail, and the separate collection of defect steel balls and qualified steel balls are realized through the sorting mechanism and the material collecting mechanism. The detection sorting device provided by the invention has the advantages that the automatic feed, detection and sorting of the steel balls are realized, a detection process is that two-dimensional motion of a traditional unfolding disc is changed into single one-dimensional rolling of one-sided steel balls, the detection efficiency is high, a false drop ratio and an omission ratio are low, and the steel balls are not magnetized or the surfaces of the steel balls are not damaged in a detection process.

The invention discloses a construction method for embedding a pipe in a ground source heat pump pouring pile reinforcement cage. A steel pipe is used for substituting for a solid reinforcing steel bar as the main rib of a pouring pile reinforcement cage, and a heat transmission pipe is embedded in the steel pipe, as a result, problems caused by binding and embedding the heat transmission pipe and the reinforcement cage, including mutual interference, high probability of corrosion of a reinforcing steel bar, effect on overall bearing capacity of a pile foundation and the like, are solved. Compared with the traditional way of binding and embedding the heat transmission pipe and the reinforcement cage, the construction method is higher in survival rate of embedded pipe, compactedness of concrete is high, and embedment of the heat transmission pipe surely does not lower the overall bearing capacity of the pile foundation; compared with another traditional way of drilling and pipe embedding, the construction method greatly shortens construction period and saves underground space and engineering cost. The construction method is simple in construction process, strong in operability, convenient for quality control, and remarkable in economic benefit and heat transmission effect.

The invention relates to an indoor model testing apparatus for analyzing influences of shield tunnel grouting construction on adjacent pile foundations. The indoor model testing apparatus comprises a model box, a tunnel grouting construction simulator, a tunnel lining model and a pile foundation model. The model box is filled with sandy soil mass, the tunnel lining model comprises longitudinally-segmented aluminum alloy hollow pipes and is placed in the left half part of the model box, and lining segments are separated by annular thin rubber plates; the pile foundation model is placed in the right half part of the model box and vertical to the tunnel lining model; a displacement meter support is fixed to the top surface of the model box; multiple displacement meters are respectively fixed to the corresponding sandy soil mass and the surfaces of piled raft foundations of the pile foundation model through the displacement meter support; the tunnel grouting construction simulator comprises a latex film surrounding the periphery of the tunnel lining model and an annular liquid cavity formed between the tunnel model and the latex film, the annular liquid cavity is filled with grouting liquid, one end of the annular liquid cavity is connected with a liquid injection guide pipe provided with a liquid injection solenoid valve, and a liquid discharge guide pipe provided with a liquid discharge solenoid valve is arranged at the other end of the annular liquid cavity in the horizontal direction.

The invention provides a foundation pit dewatering well pressure-reduction-type plugging method. The method comprises the following steps that (1) at least one water stop ring is arranged on the outer wall of a dewatering well pipe; (2) bottom plate concrete is poured on the outer wall of the well pipe; (3) after the bottom plate concrete of a basement reaches certain strength, unnecessary well pipes on the surface of a bottom plate are cut off, and a drainage floral tube is inserted in the lower portion of a well pipe; (4) when the well is plugged, a water pump in the dewatering well pipe is lifted out, a drainage pump is started to drain water, and well plugging materials are then filled in the dewatering pipe sequentially; (5) the drainage pump stops working, and a small amount of gushing water flows out of the floral tube by itself; (6) a mud jacking pump is started to press curing agents in the dewatering well pipe; (7) the opening of the well pipe is plugged through a cover plate, the periphery of the well pipe is plugged through high-strength concrete, and dewatering well plugging is finished. The foundation pit dewatering well pressure-reduction-type plugging method is particularly suitable for engineering such as a basement which is high in underground water level, large in the amount of gushing water and high in water-proof requirements, very wide in application range, high in construction efficiency, convenient to operate and good in water plugging effect, and ensures that a later-period is hardly affected.

The invention discloses a construction method and structure for mounting a reverse-construction steel pipe column in a rotary drilled pile hole. The construction method comprises the steps as follows: 1, drilling the pile hole; 2, mounting a reinforced concrete bearing platform; 3, hoisting a pile foundation reinforcement cage; 4, hoisting the steel pipe column; 5, mounting a concrete pouring platform; 6, cleaning the pile hole; 7, adjusting the elevation, the center position and the perpendicularity of the steel pipe column; 8, completing pouring of concrete in a pile foundation and the steel pipe column. The method is simple and practical, the construction period can be shortened, the project cost can be reduced, and the problem that the construction period is longer due to the fact that the pile foundation and the steel pipe column are constructed separately is solved. By the aid of the construction method and structure, the construction period is shortened while the project quality is guaranteed. The construction method and structure have the good social benefit and the good economic benefit. According to the construction method and structure, the high-efficiency construction requirement is met, the construction cost is saved, the project cost is reduced, the problem of continuous construction of rotary drilling and the steel pipe column in basement reverse construction is effectively solved, and the construction method and structure have the wide practicability and the popularization performance.

The invention discloses a construction method of a two-sidestep and four-step excavation support of a weak large-span tunnel of a mountain ridge. The construction method comprises the steps of: performing advanced support at a tunnel opening section by adopting a big pipe shed with the diameter phi of 108 mm before tunnel excavation; performing advance support at the tunnel body section by adopting a small guide pipe with the diameter of phi 42 mm or a big pipe shed with the diameter of phi 108 mm; and excavating the tunnel, wherein the tunnel excavation is divided into an upper sidestep annular excavation and a lower sidestep left-right excavation; and the tunnel excavation specifically comprises four steps as follows: step 1, performing annular excavation and primary support on pre-remained core soil (2) of the upper sidestep; step 2, performing excavation and primary support on the core soil (2); step 3, performing excavation and primary support on the left side of the lower sidestep; and step 4, performing excavation and primary support on the right side of the lower sidestep. The construction method of the two-sidestep and four-step excavation support of the weak large-span tunnel of the mountain ridge, disclosed by the invention, has the advantages of solving disadvantages of multiple procedures, difficult construction and organization, low work efficiency, long sealing time of an inverted arch, great deformation of surrounding stones and the like in the prior art.

The invention discloses a concentric sliding block simultaneous casing drilling tool, a center drilling bit and centralizer. The concentric sliding block simultaneous casing drilling tool is formed by the centralizer, a ladder-shaped tapping center drilling bit and semicircle-shaped expanding drilling pieces, wherein the ladder-shaped tapping center drilling bit is connected and matched with a hole to which the centralizer is aligned for torque transmission, the ladder-shaped tapping center drilling bit is connected and located through a locating groove, a locating hole, a solid cylindrical pin and a hollow expansion pin, three semicircle-shaped expanding drilling pieces are in torque transmission through a T-shaped oblique groove and an R arc-shaped oblique groove, mutual included angles of the T-shaped oblique groove and the R arc-shaped oblique groove are 120 degrees by using an axis of the ladder-shaped tapping center drilling bit as the center, the semicircle-shaped expanding drilling pieces slide backwards to the end surface of the centralizer along the T-shaped oblique groove and the R arc-shaped oblique groove when being subjected to rock resistance and can be located, an expanding simultaneous casing can be formed, and the semicircle-shaped expanding drilling pieces slide downwards, can be narrowed and withdrawn due to the resistance of a pipe boot during upward drawing. According to the concentric sliding block simultaneous casing drilling tool disclosed by the invention, the front area of the tapping drilling bit is small, the force is concentrated, and the tapping drilling bit can crush harder or large rocks firstly at stages at crushing speed.

The invention provides an axial embedded blast hole of a reinforced concrete beam and a blasting demolition method. The blast hole is formed in the mode that a pipe is embedded in the beam in the axial direction, continuous or discontinuous charging is adopted in the blast hole, a detonating fuse is arranged in the blast hole in an overall-length mode, a stirrup is cut off, and other technical means are taken. In this way, drilling operation is avoided, the number of blast holes and the number of detonators are reduced, consumption of explosive and the detonators is reduced, the smashing effect on reinforced concrete is improved, and the damage of explosion to the environment is reduced. The axial embedded blast hole of the reinforced concrete beam and the blasting demolition method can bring remarkable economic and social benefits.

The invention discloses a hollow interlayer pipe wall compound steel pipe concrete wind power tower with ribs. The tower comprises a cast-in-place reinforced concrete foundation and a steel pipe concrete tower section set. Steel pipe concrete tower sections are connected through horizontal flange discs to form a vertical tower cylinder, meanwhile, the bottom of the tower cylinder is fixed on the cast-in-place reinforced concrete foundation, the steel pipe concrete tower sections comprise inner steel pipes, outer steel pipes and concrete layers cast in the interlayers between the inner steel pipes and the outer steel pipes, first reinforced ribs are arranged on the peripheries of the outer walls of the inner steel pipes, and second reinforced ribs are arranged on the peripheries of the inner walls of the outer steel pipes. Compared with an existing steel tower, the compound steel pipe concrete structure with a hollow interlayer and with the pipe walls provided with the ribs is used, the reinforced ribs are arranged on the pipe wall sides where the inner steel pipes and the outer steel pipes are in contact with concrete, the interface binding force of the steel pipes and the concrete is enhanced, the bearing capacity and the ductility of the tower are improved, and early local buckling damage of the thin-wall steel pipes can be avoided or delayed.

The present invention relates to new graphene-based steel tubes, pipes or risers, whose products are obtained by a method of manufacturing that consists in adding graphene nanosheets, heat treatment, forming tubular geometry and surface finish. In addition to the unique chemical composition based on graphene, with carbon content ranging between 0.01 and 21.0%, these products have the wall thickness between 800 nm and 80 mm (from ultra fine to thick), diameter between 10 and 5000 mm, and having a tensile strength not less than 2000 MPa reaching up to 50 GPa, with far superior features to those obtained by other methods. Such products can be used for petroleum, natural gas and biofuels transportation, including in deepwater submarine riser systems (>1500 m), with direct application in the oil industry.

The invention relates to a large-range goaf group filling method and belongs to the technical field of mining engineering. According to the technical scheme, the method includes: dividing filling units, selecting filling material, and laying out filling pipes; calculating to determine the thickness of a filling retaining wall, performing site construction, reserving drain holes and filter holes in the filling retaining wall, and stacking a hillock inverted filter layer behind the filling retaining wall; laying filter pipes, allowing the filter pipes to extend out from the drain holes of the filling retaining wall; constructing a filling borehole, 133mm-150mm in diameter, at a highest point, applying the filling borehole as an overhead discharge point, ensuring roof contact, constructing the corresponding number of filling boreholes according to practical situation, and performing alternating filling. The large-range goaf group filling method has the advantages that filling process is simplified, filling efficiency is increased, plugging amount is decreased, filling amount is decreased, filling period is shortened, filling cost is lowered, and normal mine production is guaranteed.

The invention discloses a bridge composite foundation consisting of an open caisson and a pile and a construction method and relates to bridge technology. The composite foundation consists of the open caisson and the pile. Open caisson partition walls have horizontal and longitudinal wall structures. A pile sinking preformed hole is reserved at the intersection of the open caisson partition walls. A steel pipe pile or a concrete driven pile sinks through the hole. The construction method comprises the following steps of: manufacturing the first section of the open caisson, floating the first section to a bridge position designed position, positioning the first section, filling water into an open caisson wall and the partition walls to sink the pile, heightening the section until the open caisson sinks to position, and casting concrete into the open caisson wall and the partition walls; after the open caisson sucks mud to sink, continuously heightening the section, and casting open caisson bottom sealing concrete when the open caisson is heightened to a designed standard height; riprapping the periphery of the open caisson to protect the open caisson, pumping water from the open caisson or coring the open caisson, and constructing an open caisson top plate; and after sinking the pile in the pile sinking preformed hole, casting the concrete into the pile sinking preformed hole to realize connection between the open caisson and the pile. The bridge composite foundation of the invention is suitable for a deep water soft soil foundation, takes the advantage of the open caisson having high rigidity and serving as a pile foundation construction space enclosing structure and exerts the characteristic of controlling sinking of the pile foundation.

The invention discloses a construction method for mass pipe concrete without temperature reduction. The construction method is characterized by comprising the following steps: A. proportioning and preparation of raw materials; B. temperature control; C. construction of concrete; and D. heat preservation and curing operations. When the proportioning is designed, cement with low heat release is selected, and the cement is mixed with a large quantity of fly ash mineral mixtures and mixed with an extrusion delayed coagulation type admixture, thereby effectively reducing the temperature rise of the concrete. Based on in-situ temperature monitoring, the highest temperature of each layer of concrete is about 60 DEG C, and the maximum temperature difference is less than 25 DEG C; the crack resistance of the concrete C40 prepared by blending the fly ash and the extrusion type admixture reaches the grade II, and the concrete has excellent crack resistance; and the shrinkage rate in 60d is only 2.3*10<-4>, and the volume stability is good. In the construction of the mass concrete, the corresponding construction processes are formulated so as to effectively prevent cracks from occurring.

A method 100 of determining a flow rate of a fluid flowing in a pipe. The method 100 includes measuring a pressure of fluid at at least two locations in the pipe 101, the pressure being measured by sensors that are positioned on or in the pipe. A wave speed of fluid is determined 102 based on measured pressure of fluid at a location in the pipe. The flow rate of fluid is determined 106 based on the determined wave speed and based on the measured pressures at two locations in the pipe. An apparatus for determining a flow rate of fluid flowing in a pipe is configured to perform the method 100.

The invention relates to a slurry shield tunneling machine underwater arrival construction method which is characterized by comprising main technological processes including end strengthening, end freezing, tunnel portal chiseling, foundation trench backfilling, shield tunneling machine arrival and subsequent construction. According to the slurry shield tunneling machine underwater arrival construction method, when a shield tunneling machine arrives under the working conditions of deep earthing and high water pressure, an end cannot lower the water level or the lowered water level cannot meet the desired effect, and then the underwater arrival construction method can be adopted. Under the conditions that not enough site is provided for end strengthening or not enough auxiliary measures for the dewatering are provided, the safe and effective slurry shield tunneling machine underwater arrival construction method can also be adopted. The slurry shield tunneling machine underwater arrival construction method has the advantages of being safe, reliable, small in effect on ground surface and the like. The time when the whole shield tunneling machine arrives is obviously shortened, and the quality of splicing tube pipes is good.

The invention belongs to the technical field of pipes and discloses a strengthened steel pipe with a rib spirally wound as well as special equipment and a method for preparing the strengthened steel pipe. The main technical scheme of the invention is as follows: the strengthened steel pipe comprises a pipe body, wherein the pipe body is formed by spirally rolling and welding a large steel strip; a structure wall strengthening rib is spirally wound and welded on the outer wall of the pipe body; the structure wall strengthening rib is formed by a small steel strip rolled to be structure wall shaped and spirally wound. During manufacture of the strengthened steel pipe, the large steel strip is formed into the pipe body in advance, the small steel strip is formed into a spiral strengthening rib, on a combined molding unit, the spiral strengthening rib is mounted on the pipe body in a sleeving manner, and is pressed by a limiting rolling wheel and continuously and discontinuously welded. A spiral welding seam, the structure wall strengthening rib and welding nodes greatly improve the ring stiffness and bearing strength of pipes, the wall thickness of the pipe body is remarkably reduced, and the strengthened steel pipe is particularly applicable to negative-pressure pipelines and positive-pressure liquid pipe with lower bearing capacity, and can also be applicable to positive-pressure gas conveying pipelines.

The invention discloses a large-volume concrete fast pouring and temperature control method which comprises the steps of (1) water pipe cooling and (2) surface thermal insulation. The method can lead the thickness of a pouring layer to break through 3m and lead the pouring interim period to be less than 5 days through the method of changing the material of a water pipe, the diameter of the water pipe, the thickness of the pipe wall, the spacing interval of the water pipe, the position of the water pipe, the length of the water pipe, water temperature at an inlet, flow rate of cooling water, water supply time and water flow direction during the water pipe cooling measure, and the corresponding surface thermal insulation method for assistance, thereby realizing fast pouring of large-volume concrete and simultaneously effectively preventing cracks. The method can be used for the large-volume concrete fast construction in civil and hydraulic engineering.

The invention belongs to the field of metal materials and relates to a short-flow efficient production method for brass tubes. The method is characterized in that: brass tube billets which have axial orientated tissue and high internal and external surface quality are produced efficiently by using the low-consumption hot and cold combination cast type continuous casting technology; the tube billets are subjected to subsequent forming directly under the condition that surfaces are not peeled, wherein intermediate annealing is not needed to be performed or only a little bit of low-temperature annealing is needed to produce the brass tubes efficiently. The hot and cold combination cast type continuous casting is characterized in that: a continuous casting crystallizer is formed by combining a hot section which is heated and a cold section which is subjected to forced cooling by circulating water, and the tube billets which are high in the quality of the surfaces and have the axial orientated tissue are prepared efficiently by controlling solidification interfaces of the tubes to be positioned nearby the junction of the hot section and the cold section. The method has the advantages of short production flow, low consumption, high yield and high production efficiency.

The invention relates to a construction method of an unsymmetrical loading tunnel heterotropic hole. A heterotropic hole construction method in which a trapezoid cover arch large-pipe shed is utilized as a presupport is adopted, so that the height of a lateral upward slop inside a tunnel portal is effectively reduced, the construction requirement of underground excavation of wall rock coverage thickness of arch shoulders outside the tunnel is met, coordinated fusion of the tunnel portal and the ambient environment is realized, and the ambient environment of the tunnel portal is protected; the large large-pipe shed presupport and back-pressure backfilling outside the tunnel are adopted for improving the bias state of a wall rock and a lining structure and advantageous conditions are created for safe construction in the hole. The trapezoid cover arch is adopted for well solving the problem that the hole forming surface oblique crossing and a steel support as well as hole gate are uncoordinated in orthogonality, so that the difficulty of underground excavation in the hole is reduced, and the safety and practicability of construction of the unsymmetrical loading tunnel heterotropic hole are ensured; by virtue of hole greening protection, the problem of incoordination between the tunnel portal and the ambient environment due to back-pressure backfilling outside the tunnel is reduced and a 'green tunnel portal' engineering concept is realized.

The invention discloses a door type composite pipe roof umbrella arch structure for a tunnel opening and a construction method thereof. The structure comprises a pipe roof umbrella arch positioned on the top part of the tunnel opening and pre-reinforced piles positioned on the two sides of the tunnel opening; the pipe roof umbrella arch is connected with the pre-reinforced piles and supported by the pre-reinforced piles; the top ends of the pre-reinforced piles are fixedly connected with a top cover beam; and bagged backfill is filled between the top cover beam and the pipe roof umbrella arch. The construction method comprises the following steps: firstly excavating at the two sides of the tunnel opening, pouring the pre-reinforced piles, and pre-burying connecting sleeves in the piles; then, excavating the section of the pipe roof umbrella arch and keeping the core soil; inserting connecting reinforcing steel bars into the connecting sleeves, and pouring the pipe roof umbrella arch at the same time so that the pipe roof umbrella arch is fixedly connected with the pre-reinforced piles integrally; meanwhile, reserving a pipe roof sleeve in the pipe roof umbrella arch, and setting long pipe roof; and finally, filling bagged backfill above the pipe roof umbrella arch and pouring the top cover beam to finish the construction. The door type composite pipe roof umbrella arch structure disclosed by the invention is more stable, has relatively good mechanical property, and can effectively prevent the collapse of the tunnel opening and slippage of edge and slope.

A system for cleaning pipes and pipe joints where the interior surface of the pipe becomes coated with material being processed comprising a cylindrical cleaning body having opposing first and second ends, said cylindrical body having an annular shape with interior and exterior walls so that the outer wall contacts the interior surface of a pipe and wherein ends of the cleaning body have means for removing material deposited on the interior surface, a means for moving the apparatus along the length of said pipe, a first and second means for cleaning said cleaning body having passages that allow fluid to pass through, wherein said first and second cleaning means mates with said first and second ends of said cleaning body, where said cleaning body is moved into contact with said cleaning means to dislodge accumulated deposits from the cleaning body and simultaneously dislodging accumulated deposits from said cleaning means.

The invention discloses a gas pumping sleeve-penetrating occluder and a use method thereof. The occluder is mainly formed by jointing a bag A combination and at least one bag B combination; the bag A combination comprises a No.1 bag (14),a grouting pipe (1), a gas leaking handling pipe and a transition part; the grouting pipe and the gas leaking handling pipe respectively penetrate through the No.1 bag; a check valve is arranged on the grouting pipe in the No.1 bag; the bag B combination comprises a No.2 bag and a grouting pipe penetrating through the No.2 bag; a check valve is arranged at the grouting pipe in the No.2 bag; short grouting pipes between the bag A combination and the bag B combination are jointed by a straight joint; a pumping pipe penetrates through the No.1 bag and the No.2 bag. According to the gas pumping sleeve-penetrating occluder and the use method thereof, one bag A combination and multiple bag B combinations can be serially connected, more effective grouting hole sealing can be realized on drill holes of a hole sealing section, generation and expansion of coal wall seams around the drill holes at the hole sealing section can be more effectively avoided, and the occluder can also fill extremely small coal seams, so the hole sealing effect is optimal.

The invention discloses a method for ultrasonically detecting the bonding state of steel pipes and concrete. The method comprises the following steps: (1), making a compared sample same with the specification of a detected object; (2), detecting whether the compared sample can be used or not; (3), making a sensitivity curve; (4), carrying out detection: using a debugged digital ultrasonic detector to detect the bonding state of a detected steel pipe and concrete, and observing the highest reflection amplitude of multiple times of interface echoes and the envelope diagram form of multiple times of interface echoes of the steel pipe and the concrete; if the highest interface reflection amplitude is higher than the lower line of the sensitivity curve, judging that bonding is bad; if the highest interface reflection amplitude is lower than or equal to the lower line of the sensitivity curve, judging that bonding is good; if the highest interface reflection amplitude is larger than or equal to the upper line of the sensitivity curve, judging that the steel pipe and the concrete are completely debonded. The method can realize fast, complete and reliable non-destructive detection to bonding state of steel pipes and concrete on site, realizes fast and effective evaluation for the bonding state of steel pipes and concrete in the premise that a steel pipe and concrete structure is not destroyed, and reduces manual detection intensity.

The invention provides a municipal drainage pipeline slurry balance pipe-jacking construction method which includes that on a municipal drainage construction pipeline, every 80-120m pipeline serves as one construction section, a working pit and a receiving pit are adopted in each construction section to serve as pipe-jacking sinking wells, the sinking wells are sunk to be at the designed sinking well height, and then slurry balance machines are used for pipe-jacking construction; and the sinking wells are subjected to groove digging by aid of steel plate piles and water stop curtain supports, the machines are used for earthwork digging in the sinking process, the sinking wells are sunk to the preset depth under the effect of sinking well rebar concrete self weight or external force, and the slurry balance machines are used for pipeline pipe-jacking construction. The municipal drainage pipeline slurry balance pipe-jacking construction method has the advantages of having strong safety, having small influence on close buildings and pipelines, leading the earth surface to have small settlement and shifting, and being short in construction period, saving in manufacture cost, small in floor occupation and the like, solves the technical problems of advanced support construction for rain falling, wide digging range and large damage influence on surrounding pipeline roads, and is especially applicable to construction in narrow places and other complex environment conditions.

The invention provides a prestressed pipe pile construction method based on the building information modeling (BIM). The construction method comprises the following steps that a, the layer thicknesses and the mechanical properties of various types of soil layers around pipe piles are input into the BIM according to a bore hole columnar section, and a 3 D model of the pipe piles is established; b, an internal force analysis diagram of each pipe pile under different excavation working conditions is educed through the BIM technology, the stress of each pipe pile under different excavation working conditions is analyzed, the maximum shear force value Vmax of each segment of the pipe piles under different excavation working conditions is figured out, and a shear force envelope diagram is drawn; and c, according to the stress analysis, H-shaped steel is arranged on a dangerous segment where the shear force value Vmax of the pipe piles is greater than V, and V is the shear strength of the pipe piles. According to the prestressed pipe pile construction method based on the BIM, the prestress analysis is conducted on the pipe piles through the BIM, and the reinforcement treatment is conducted on the pipe piles, so that the shear capacity of the pipe piles is increased.

A method for removal of wax deposited on an inner wall in contact with a fluid stream. The method includes the steps of cooling the inner wall and the fluid stream to a temperature of or below the wax appearance temperature, enabling wax to dissolve and precipitate on the inner wall, and heating of the inner wall for a short period of time to release the deposited wax from the surface of the inner wall, mainly in the form of solid parts. The thickness of wax deposits in a pipe section can be determined by computing the temperatures obtained upstream and downstream in the said pipe section, before and after applying heat pulse.