30results about How to "Good slurry effect" patented technology

The invention discloses a method for grouting in a hole and effectively stopping the grout. The method is divided into two main action processes, namely grouting and stopping the grount and comprises the following steps: drilling a hole, grouting, expanding with an expansion rubber plug, grouting and disassembling. The device for realizing the method for grouting in the hole and effectively stopping the grout comprises a grout inlet pipe (1), a grout pipeline, an expansion stop-grouting plug (11) and a single-way pressure valve (14) which are sequentially connected, wherein the grout pipeline and the expansion stop=grouting plug (11) as well as the expansion stop-grouting plug (11) and the single-way pressure valve (14) are connected by joints. The technology can stop the grout at any section in the grouted hole with good effect. Besides, steel grout transmission pipes can be conveniently removed from the device, thereby reducing the waste of the materials while ensuring the grout stopping effect.

The invention provides a preparation method of oxidative cationic modified starch slurry, which comprises the following steps of: firstly, dissolving starch into water to prepare starch milk; secondly, using an oxidant namely sodium hypochlorite to perform oxidation reaction with the starch to obtain oxidized starch; thirdly, removing chlorine; fourthly, adopting a cationic etherifying agent to perform etherification reaction; and finally, performing dehydration and drying. When the modified starch prepared from the starch serves as the slurry, the slurry not only has the characteristics of high fluidity, low viscosity and high concentration usage of oxidative starch slurry, but also solves the problem that the oxidative starch has poor thermal stability through quaternary ammonium etherification, and simultaneously, the slurry additionally obtains the following advantages that: the adhesiveness to a warp is significantly improved; the serous membrane forming capacity is strong, and the slurry is difficult to break and burst; the paste viscosity is stable, and the fluidity is good; the slurry has certain hygroscopicity, and has high co-solvency with a synthetic slurry; a membrane is easy to be dissolved in water, and is easy to desize; and paste solution has high thermal stability, is not influenced by high heat fusing, and the like.

The invention provides a method for preparing modified starch by oxidation and succinic anhydride esterification. The method comprises the following steps of: dissolving starch into water to form starch milk, performing oxidation reaction on sodium hypochlorite oxidant and starch to obtain oxidized starch, then removing chlorine, performing esterification reaction by adopting succinic anhydride, and finally dehydrating and drying the reaction product to obtain the modified starch. When the modified starch prepared by the method is used as starch size, the modified starch has the properties of good fluidity, low viscosity and high-concentration use of the oxidized starch; and because the succinic anhydride esterification solves the problem of poor thermal stability of the oxidized starch, the modified starch has the advantages that: adhesion of warps is remarkably improved; a size film has strong forming capability, good mechanical strength and extensibility; the paste has stable viscosity and good fluidity; the size has certain moisture absorption property; the modified starch has good co-solvency with a synthetic size; the film is easy to dissolve in water, and de-sizing is easy; and the paste has high thermal stability, is not affected by high-temperature melting and the like.

The invention relates to a convenient grouting sleeve device suitable for backwall grouting and a use method thereof. The grouting sleeve device can be divided into a front-loading grouting pipe set,a stop grouting expansion rubber sleeve and direct set, an intermediate connecting device and a grout inlet pipeline. The front-loading grouting pipe set includes an ordinary steel tube with an internal thread at one end and four small-bore grout sealing tubes welded at the periphery and provided with overhanging ports of 45-degree inclined angle on the outer wall; a four-way device of the grout inlet pipeline is a stainless steel four-way device with valves at each of end ports, and three end ports are a grout A end port, a grout B end port and a pressure relief end port; and a tube head cover is a round pipe plug device with an external thread at one end, and a grouting hole can be plugged after the tube head cover is screwed. Compared with existing devices, the convenient grouting sleeve device suitable for the backwall grouting successfully realizes the convenient handling of end sockets, the recycle of the device and the rapid restoration of the wall surface, greatly improves thework efficiency, reduces the cost expenditure, and can be widely used in backwall grouting construction.

The invention discloses a directional positioning grouting reinforcement method for a specific area in a large rock heap loose body with a large porosity. Sleeve valve layered grouting process is adopted, and quick-setting expansion grout is injected layer by layer to form a surrounding grout-stop curtain wall. The bottom grout-stop curtain wall is closed with the surrounding grout-stop curtain walls to form a "U"-shaped grout-stop curtain that limits the grouting reinforcement range of the rock pile. Cement water glass double slurry is used for grouting construction of "U" type grout-stop curtain inside the grout-stop curtain. Finally, ordinary cement slurry is used in the double-layer "U" grout-stop curtain to carry out the grouting reinforcement construction of the rock heap loose body. The invention has good economical efficiency, and can effectively prevent a large amount of grout from being lost due to the overhead structure in the loose rock heap in the ordinary grouting process through the application of the "U"-shaped grouting curtains on the inner and outer layers of the grouting area. The speed is fast, the work efficiency is high, and the total management cost is low.

The invention discloses a joint grouting-stopping device for a steel-concrete combined section and a construction method thereof, and relates to the technical field of joint grouting-stopping construction. The joint grouting-stopping device for the steel-concrete combined section and the construction method thereof aim at solving the problem that when a steel structure of the steel-concrete combined section is mounted, a hanging basket and a side formwork are both dismantled, and no good grouting-stopping measure is set to ensure the concrete construction quality. According to the technical key points, the joint grouting-stopping device comprises an upper wing plate; a lower wing plate is arranged below the upper wing plate parallelly, the centers of the upper wing plate and the lower wingplate are connected with a vertically-arranged supporting plate, the lower wing plate is in a U shape, and an opening of the lower wing plate faces the upper wing plate; and the lower wing plate is formed by manufacturing and machining a polyurethane-type water swelling elastic waterproof material. During construction, the supporting plate and the lower wing plate are clamped into the joint, thenthe upper wing plate is fixed to the two sides of the joint, the lower wing plate is bent towards the upper wing plate under the action of the downward pressing force to closely abut against the twoside walls of the joint, and accordingly the grouting-stopping effect can also be ensured while construction is facilitated.

The invention discloses a movable grouting pump with the stirring function. The movable grouting pump comprises a grouting pump body, a pure copper motor, a grouting cylinder, a fixing block, a pressure gauge, a stirring mechanism, a containing groove, a discharging pipe and an adjusting mechanism, wherein the grouting pump body is fixedly connected with a damping plate through a fixing plate, and the damping plate is fixedly connected with a bottom plate through a first damping spring; the pure copper motor is arranged above the grouting pump body; one side of the grouting cylinder is fixedly connected with the grouting pump body through a piston material cylinder; the fixing block is arranged above one side of the damping plate; the pressure gauge is arranged at the top end of the grouting cylinder; a pressure relief valve is arranged on the other side of the grouting cylinder; the stirring mechanism is arranged on one side of the grouting pump body; and the containing groove is formed in a containing platform. According to the movable grouting pump with the stirring function, a moving mechanism and a stirring mechanism are arranged, the moving mechanism conveniently drives the grouting pump body to move through rolling wheels, the stirring mechanism conveniently and evenly stirs cement mortar, and grouting of the grouting pump is facilitated.

The invention provides a precast beam construction system. A supporting assembly comprises a plurality of first supporting bodies, the first supporting bodies are fixedly connected to the portion between first bottom dies and a base table, a gap is formed between every two adjacent first supporting bodies, and at least one gap is a hoisting portion; a die further comprises a second bottom die, the second bottom die is fixedly arranged in the hoisting portion, the two ends, in the extending direction of a precast beam, of the second bottom die abut against the ends of the adjacent first bottom dies respectively, and the edges of the two sides of the upper surface of the second bottom die abut against the bottoms of two side dies; the supporting assembly, a bridge plate and the die are sequentially laid on the base table from bottom to top, and the longitudinal length and the transverse width of a precast pedestal can be freely adjusted according to the length and the width of the precast box beam; and meanwhile, the hoisting portion is arranged in the construction system, all assemblies laid in the hoisting portion are independent of non-hoisting portions, therefore the precast beam can be exposed only by detaching all the assemblies laid in the hoisting portion, and hoisting is facilitated.

The invention discloses a coal mine underground deep hole quick sealing and grouting device and belongs to the technical field of coal mine underground grouting and hole sealing. The grouting device is high in engineering timeliness and grouting speed and large in diffusion radius and can achieve the objective of single-hole sectional continuous grouting. A one-way valve joint is of an internal thread structure with a forward thread at one end and a reverse thread at the other end, the reverse thread of the one-way valve joint is connected with the front end of a grouting central pipe, a sealing cover is hermetically mounted at the rear end of the grouting central pipe in a sleeved manner, a top cap, a turnbuckle, a one-way valve and a rubber sleeve are sequentially and fixedly mounted onthe outer wall of the grouting central pipe in a sleeved manner, the front end of the one-way valve is abutted against the top cap and the turnbuckle, each of two ends of the rubber sleeve is clampedand shaped through an iron core and an iron loop, an upper iron core on the rubber sleeve is fixed on the grouting central pipe, a lower iron core movably sleeves the grouting central pipe, and an inlet of the one-way valve is communicated with the inside of the grouting central pipe while an outlet of the same is communicated with the rubber sleeve.

The invention discloses concrete slab construction process in a storage yard. Through concrete slab construction process in the storage yard, a host of process improvements can be made on manufacture and erection of a template, concrete control, installation of drive rods and processing of slab slits such that the template is convenient and rapid to erect and dismount and vertical inclination and straightness of the temperature can be flexibly regulated. The template is firmly fixed and has good pulp-checking effect. The drive rods are accurate in positions and straightened. The top surface of the slab is flat without crack. Top-loosening and aggregate exposure can be avoided so that problems such as corner missing, deckle edges, laps of slab slits and rainwater the drive rods are prevented and the drive rods are not corroded. The quality and appearance quality of the concrete slab construction are ensured in order to provide experience to concrete slab construction in the storage yard.

The invention discloses a machining method of a bottom sealing hoop for fabricated pile cap construction. The method includes the steps of (1) selecting a mould; (2) selecting a hoop material; (3) machining the hoop; (4) selecting an annular blocking plate material and discharging; (5) welding an annular blocking plate; (6) welding connecting bolts and cutting; and (7) stopping gouting. Accordingto the machining method of the bottom sealing hoop for fabricated pile cap construction, when the bottom sealing hoop is applied to assembly type pile cap construction, the bottom sealing hoop is convenient and efficient to install (12 sets of bottom sealing hoops can be installed in a single set every day and under the condition that the bottom sealing hoop is affected by damp levels), and the grout stopping effect is good.

The invention discloses a rubber blanket slurry stopping process for the position of prefabricated part protruding bars. Polypropylene slurry stopping strips are replaced by rubber slurry stopping blankets, the rubber slurry stopping blankets of which the diameter is equal to that of the protruding bars can be selected according to the diameter of the protruding bars during operation, the protruding bars are sleeved with the rubber slurry stopping blankets, positions of the rubber slurry stopping blankets are adjusted so that circular washers of backseats of the rubber slurry stopping blankets can be closely attached to an inner formwork, no gap exists between the rebars and the rubber slurry stopping blankets as well as between the rubber slurry stopping blankets and the formwork, and the slurry stopping effect is achieved. Due to the fact that cylindrical rubber rings can well wrap the rebars in a fastening mode, and meanwhile baffle pieces are arranged on the rear portions of the rubber slurry stopping blankets, so that the phenomenon of loosening or falling of slurry stopping materials caused during adjustment of the length of the rebars and vibration is well eliminated, and the better slurry stopping effect is achieved.

The invention discloses a hole sealing structure for reinforcing a shallow foundation through a grouting method and a construction technology of the hole sealing structure, and belongs to the field ofshallow foundation reinforcing. The problem that sealing of a shallow foundation grouting hole is unreasonable is solved. The hole sealing structure comprises a grouting stop plate, grouting stop ribs, grouting holes, a hole sealing positioning belt and hole sealing concrete, the grouting holes penetrate through the grouting stop plate and an outdoor grouting stop plate to be evenly distributed on the two sides of a foundation wall, a positioning device is fixed to the grouting pipe so as to determine the position of the hole sealing positioning belt, the outdoor grouting stop plate is linearly arranged along the outer wall of the foundation wall, and the grouting stop ribs are embedded into foundation soil along the outdoor grouting stop plate. The construction technology of the hole sealing structure comprises the steps of early-stage preparation, foundation ditch excavation, drilling, grouting pipe installation and hole sealing. The grouting stop effect is good, construction is easy and convenient, shallow foundation bearing capacity and stability are greatly improved, the construction cost is low, and economic benefits are remarkable.