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134results about How to "Solve floating" patented technology

Method for controlling quality of tunnel pipe sheet built by using shield method and pipe sheet structure

The invention provides a method for controlling the quality of a tunnel pipe sheet built by using a shield method, which comprises the steps of pipe sheet structure design, pipe sheet construction detection, pipe sheet assembling quality requirement and tunnel stability control, wherein in the pipe sheet structure design, the water prevention and the bonding strength are improved by the structural design of a connecting way, strength, water prevention, and the like of pipe sheets; in the pipe sheet construction detection, the eight-point measurement is carried out on the pipe sheets in the process of construction, the concentricity relation between the previous ring of pipe sheets and a shield shell is calculated, and the position of the next ring of pipe sheets is selected; in the pipe sheet assembling quality requirement, an assembled ring height difference and a longitudinal joint flare angle are controlled to confirm the assembling quality; and in the tunnel stability control, the floating of the pipe sheets is effectively prevented in a frame weight and synchronous slurry injection matching construction way after assembly. Accordingly, the quality of the pipe sheets is controlled in the whole course from structural design to construction, thereby ensuring the tunnel construction quality.
Owner:SHANGHAI TUNNEL ENG CO LTD

Integrated autotrophic synchronous biological denitrification granulation device

The invention discloses an integrated autotrophic synchronous biological denitrification granulation device which comprises an outer barrel arranged on a support.An inner barrel is arranged inside the outer barrel, both a water incoming pipe and an air incoming pipe penetrate the undersurface to extend into the inner barrel, the end of the air incoming pipe in the inner barrel is connected with an aeration head, the top of the outer barrel is connected with a sludge backflow slope, a sedimentation barrel is connected above the sludge backflow slope, an overflow weir is arranged at the upper edge of the sedimentation barrel, a water collection tank is arranged outside the sedimentation barrel, an isolation barrel is arranged at the top of the inner barrel in a sleeved manner, a sludge backflow gap is formed between the isolation barrel and the sludge backflow slope, the top of the isolation barrel is higher than the sedimentation barrel, a second gas-water separation annular baffle is connected on the inner wall of the sedimentation barrel, and a first gas-water separation annular baffle is arranged at a position above the second gas-water separation annular baffle and on the outer wall of the isolation barrel.A circulating device does not need to be added externally, so that energy conservation is realized; granular sludge can be cultured under action of self-circulation, and setting performance is good.
Owner:BIOGAS SCI RES INST MIN OF AGRI

Lightweight wall special-purpose cell concrete, and production method thereof

The invention discloses a lightweight wall special-purpose cell concrete, and a production method thereof. The production method comprises following steps: (1) rapid hardening sulphoaluminate cement, ordinary Portland cement, and dry discharge fly ash are delivered into a double helix conical mixer so as to obtain a composite cementing agent via premixing; (2) water, cold-water-soluble polyvinyl alcohol powder, polypropylene reinforcing fiber, calcium stearate water repellent, a silane coupling agent, expanded perlite, and polyphenyl foam particle are delivered into an agitator; (3) the composite cementing agent obtained via step (1) is delivered into the agitator, and micropore foam prepared from a micropore foaming agent via compressed air is sprayed into the agitator, an uniform slurry is obtained via mixing stirring, and slurry volume weight is controlled to be 1000 to 1200kg / m3; (4) the uniform slurry is pumped into lightweight wall products or cast-in-situ wall forming moulds; and (5) finished products are obtained via curing, hardening, moulding, and demoulding. The lightweight wall special-purpose cell concrete can be used for producing various lightweight wall products and cast-in-situ lightweight concrete walls, and is an ideal material used for producing energy-saving lightweight walls and products.
Owner:NORTHWEST UNIVERSITY FOR NATIONALITIES +2

Milk beverage stabilizing agent, acid milk beverage using same and preparation method

The invention discloses a milk beverage stabilizing agent, an acid milk beverage using the same and a preparation method in the technical field of food. The milk beverage stabilizing agent comprises the following components in percentage by mass: 50%-70% of carboxymethyl curdlan, 10%-30% of Arabic gum, 10%-20% of propylene glycol alginate and 5%-10% of guar gum. The acid milk beverage comprises the following components in percentage by mass: 1%-8% of whole milk powder or defatted milk powder, 0.2%-1% of stabilizing agent, 10%-20% of white granulated sugar and the balance of water. The preparation method for the acid milk beverage comprises the following steps: taking 35 to 55 DEG C water, adding the white granulated sugar and the stabilizing agent into the water in turn, and stirring the mixture till the white granulated sugar and the stabilizing agent are dissolved to obtain solution A; taking the 35 to 55 DEG C water, adding the whole milk powder or the defatted milk powder into the water, and stirring the mixture till the whole milk powder or the defatted milk powder is dissolved to obtain solution B; and mixing the solution A and the solution B, cooling the solution to between 15 and 25 DEG C, adjusting pH to 4 by using citric acid solution, and heating, homogenizing and pasteurizing the solution to obtain the acid milk beverage. Because the carboxymethyl curdlan and the Arabic gum are introduced into the stabilizing agent, the stabilizing agent has good emulsifying effect and acid resistance, and can effectively improve the stability of a product.
Owner:SHANGHAI JIAO TONG UNIV

Grouting pile construction method for dry operation drilling and waterless pouring of concrete

ActiveCN104110028AReduce temporary land occupationReduce consumptionBulkheads/pilesMud systemsWater resources
The invention relates to a grouting pile construction method for dry operation drilling and waterless pouring of concrete. According to the method, hole drilling and cleaning are carried out in a rotary drilling dry operating method, and the concrete is poured through a waterless method. The operating steps of waterless pouring of the concrete include that when first batch of concrete is poured, the distance between a lower port of a conduit and the hole bottom ranges from 25 cm to 40 cm, and the depth, buried into the concrete, of the conduit is not less than 1 m; in the process of pouring the concrete, the buried depth of the conduit is controlled to be not less than 3 m; when the poured concrete is close to the top of a pile, the height of a funnel is increased so as to ensure that the elevation between the funnel and the top of the pile is not less than 4 m. By the adoption of the method, a mud system is completely omitted, consumption of mud raw materials and water resources is reduced, and the engineering construction cost is obviously lowered; moreover, the cost for transporting excavated muck is far lower than the cost for transporting and processing the mud, so considerable expenses for discharging and processing the mud are saved, the temporarily occupied land of the mud system is omitted, and the effect is obvious especially when construction is carried out on the condition that an urban site is narrow.
Owner:河北省水利工程局集团有限公司

CRTS III type slab ballastless track self-compacting concrete casting tooling and method

The invention provides a CRTS III type slab ballastless track self-compacting concrete casting tooling and method. The casting tooling comprises a base slab, a track slab, a transferring hopper, a casting funnel, a slurry blocking template, a three-dimensional fine regulator, a track slab pressing device, a track slab lateral sliding preventing device and a slurry blocking template pressing device. The middle casting mode is changed into the lateral surface casting, and the problems of casting efficiency and air exhaust in the CRTS III type slab ballastless track construction are solved. The track slab lateral sliding preventing device, the track slab pressing device and the slurry blocking template pressing device effectively solve the problems of upward floating, lateral sliding and slurry leakage of the track slab in the casting process, so the fine regulation and the casting construction of the CRTS III type slab ballastless track are more convenient and fast, and the casting quality is better. The construction process has the advantages that in the use process, the weight is light, the rigidity is high, the efficiency is high, the operation is simple and convenient, the work intensity is low, and the construction process can adapt to the construction of road segments such as bridges, tunnels and roadbeds.
Owner:LANGFANG HELI TIANYI MACHINERY & EQUIP

Composite building block as well as production mold and production method thereof

The invention discloses a composite building block as well as a production mold and a production method thereof. The invention provides the composite building block which is stable in structure, high in specific strength, low in water absorption, good in size stability, high in combustion grade, good in heat preservation property and low in cost, and the production mold and the production method of the composite building block. The composite building block comprises a bearing base body and at least one heat preservation body, wherein the heat preservation body is prepared from the following components in percentage by weight: 40-60% of cement, 8-15% of silica fume, 3-5% of hydrogen peroxide, 0.5-1% of a modifying agent and 31-38% of water; the bearing base body is prepared from the following components in percentage by weight: 20-40% of cement, 0-40% of tailing sand, 25-65% of a construction waste raw material, 10-40% of coal ash, 3-5% of a fiber bar-shaped material, 0.10-0.40% of hydrogen peroxide, 0.7-1.6% of an additive and 20-36% of water; at least one accommodation hole is formed in the bearing base body; the heat preservation body is arranged inside the accommodation hole and is combined with the inner wall of the accommodation hole. The invention provides the composite building block which is stable in structure, high in specific strength, low in water absorption, good in size stability, high in combustion grade, good in heat preservation property and low in cost on the whole.
Owner:CHINA BUILDING MATERIALS ACAD

Cast-in-place concrete large-size core formwork hollow floor anti-floating structure and construction method

PendingCN111749382ASolve floatingSolve costly problemsFloorsArchitectural engineeringRebar
The invention discloses a cast-in-place concrete large-size core formwork hollow floor anti-floating structure and a construction method. The cast-in-place concrete large-size core formwork hollow floor anti-floating structure comprises a formwork and a support, wherein an upper-layer reinforcing mesh and a lower-layer reinforcing mesh are arranged on the formwork, a plurality of core formworks are arranged between the upper-layer reinforcing mesh and the lower-layer reinforcing mesh, anti-floating steel bars are arranged between the upper-layer reinforcing mesh and the core formworks, the anti-floating steel bars are horizontally placed on the plurality of core formworks, vertical rods are perpendicular to the anti-floating steel bars mutually, positioning pieces are arranged on one endsof the vertical rods towards the anti-floating steel bars in an extending mode, threaded ends are arranged on the other ends of the vertical rods towards the formwork in an extending mode, bearing rods are arranged on the outer walls of the vertical rods, a plurality of through holes are formed in the formwork, the plurality of through holes are in one-to-one correspondence with the vertical rods,and connecting pieces are detachably arranged on the through holes. According to the cast-in-place concrete large-size core formwork hollow floor anti-floating structure and the construction method,the problems that in the prior art, a large-size core formwork hollow floor structure floats upwards in construction, and a large amount of labor is consumed for core formwork fixing and iron wire cleaning in a traditional construction technology are solved.
Owner:周建荣

Thin-wall internal-mould large-thickness hollow floor plate

The invention discloses a thin-wall internal-mould large-thickness hollow floor plate comprising a layer of totally-closed core pipes in circular pipe shapes, reinforcing meshes and pouring concrete, wherein the reinforcing meshes are respectively arranged above and below the layer of core pipes; a pressure pipe reinforcing bar is tightly close to and surrounds each core pipe, and a row of vertical anti-floating reinforcing bars are arranged at intervals of every 2-4 core pipes; and the pouring concrete is filled among the core pipes, the reinforcing meshes and the pressure pipe reinforcing bars and on the upper surface of the upper reinforcing mesh. The thin-wall internal-mould large-thickness hollow floor plate is in a double-layer reinforcing bar structure, the core pipes are positioned in the middle of the pouring concrete to form a hollow structure so as to become a permanent core mould, and the problems of fixation and floating of the core pipes in the concrete pouring process are solved through the structure. The invention has the advantages of fast construction, convenient installation, heat insulation and good sound insulation performance, can effectively reduce the self weight, correspondingly decreases girders, columns and walls which support the floor plate and foundation loads and greatly reduces the quantity of reinforcing bars as structural members.
Owner:INNER MONGOLIA XINGTAI CONSTRAL GRP CO LTD

Hollow body, hollow floor and manufacturing method of hollow floor

The invention provides a hollow body. The hollow body is characterized in that a lower cover detachably covers the lower end of an annular lateral wall, an upper cover covers the upper end of the annular lateral wall, and an inner cavity is formed among the lower cover, the annular lateral wall and the upper cover. Preferably, the upper cover detachably covers the upper end of the annular lateral wall. The annular lateral wall is formed by folding a foldable part in a surrounding manner. A through hole is formed in the annular lateral wall. A plurality of vertical folding lines are vertically arranged on the annular lateral wall at intervals. The invention further provides a related hollow floor and a manufacturing and construction method of the hollow floor. The hollow body has the advantages that the hollow body is ingenious in design, simple in structure, convenient to store and transport, capable of increasing prefabricating rate, time saving, labor saving, capable of lowering cost and shortening construction period, safe, economical, environmental friendly, and suitable for large-scale popularization and application; the hollow body does not float in concrete which is not cured, the hollow body can be removed after being combined with a cured concrete base plate, water accumulation in the cavity is avoided, the related hollow floor can be prefabricated, and in-situ reinforcing steel bar laying and hollow floor pouring can be reduced.
Owner:周梅艳

A turbulent flow controller for profiled billet continuous casting tundish and its installation method

The invention relates to a beam blank continuous casting tundish turbulence controller and an installation method thereof. The turbulence controller comprises a shell, a bottom plate, a sleeve core and a pressing ring, wherein the shell is of a cavity structure with the upper opening open, the bottom plate is located at the bottom of the cavity of the shell, the bottom end of the sleeve core is located on the bottom plate, the pressing ring is arranged at the upper end of the sleeve core and located in the cavity of the shell, the longitudinal center line of the pressing ring and the sleeve core coincides with the longitudinal center line of the inner cavity of the shell, and an expansion seam is arranged between the bottom of the inner cavity of the shell and the bottom plate as well as between the inner wall of the shell and the sleeve core. According to the turbulence controller, because the pressing ring is arranged on the sleeve core, the problem that upper layer magnesia carbon bricks on the side wall of the sleeve core fall off is solved; when the turbulence controller is installed, a plurality of pressing bricks are arranged on the same circumference in the same plane above the pressing ring so that the overall floatation problem of the turbulence controller can be solved, the quality stability of the turbulence controller is improved, and the unexpected technological effect is achieved.
Owner:SHANDONG IRON & STEEL CO LTD

Novel combined sedimentation tank

The invention discloses a novel combined sedimentation tank, which comprises a water distribution ditch, a pre-sedimentation zone, a water distribution zone, a fine sedimentation zone and a water discharging ditch. The pre-sedimentation zone is internally equipped with an inclined plate settler and a sludge thickening cone. The fine sedimentation zone is equipped with an inclined tube settler, a sludge thickening cone, a floating sludge baffle and a floating sludge discharging hopper. The pre-sedimentation zone is used for sedimentation of large flocculent particles and the fine sedimentation zone is used for sedimentation of small flocculent particles. The distance between inclined plates of the inclined plate settler is larger the distance between inclined tubes of inclined tube settler. Through the floating sludge discharging hopper, floating sludge inside the floating sludge baffle is discharged outside the sedimentation tank at a fixed period. The novel combined sedimentation tank provides partition sedimentation for large and small flocculent particles, the advantage of a dual settler is utilized, and distance arrangement of inclined plates and inclined tubes enables the problem of blocking of the inclined plates or the inclined plates to be avoided, thereby achieving a high sedimentation efficiency. Through arrangement of the floating sludge discharging hopper and the floating sludge baffle, the content of floating sludge and suspended matters in discharged water is obviously decreased.
Owner:HUAQI ENVIRONMENT PROTECTION SCI & TECH

Fiber-wrapped lightweight aggregateand method for inhibiting floating of lightweight aggregate

The invention discloses a fiber-wrapped lightweight aggregate and a method for inhibiting floating of the lightweight aggregate. Pre-wetted lightweight aggregate and fiber are connected into a whole through a small amount of cementing material slurry, a cementing material slurry thin layer with the fiber is formed on the surface of the lightweight aggregate, and the hair-like lightweight aggregate with the fiber is prepared after coagulation and hardening. The lightweight aggregate is used as a novel coarse aggregate to prepare lightweight concrete. Therefore, the floating problem of the lightweight aggregate is effectively solved, and the homogeneity of a test piece is ensured; one end of the fiber on the surface of the lightweight aggregate is embedded and fixed in the thin layer of the cementing material coating the surface of the aggregate, and the other end of the fiber on the surface of the lightweight aggregate is embedded and fixed in concrete slurry, so that the contact area between the aggregate and the cement slurry is increased. Compared with a method of directly adding fibers, the method has the advantages that prepared concrete has larger tensile strength and larger interface bonding strength with the aggregate and cement paste, so that the lightweight aggregate is more effectively prevented from floating upwards.
Owner:BEIJING UNIV OF TECH
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