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3266 results about "Grout" patented technology

Grout is a dense fluid which is used to fill gaps or used as reinforcement in existing structures. Grout is generally a mixture of water, cement, and sand and is employed in pressure grouting, embedding rebar in masonry walls, connecting sections of pre-cast concrete, filling voids, and sealing joints such as those between tiles. Common uses for grout in the household include filling in tiles of shower floors and kitchen tiles. It is often color tinted when it has to be kept visible and sometimes includes fine gravel when being used to fill large spaces (such as the cores of concrete blocks). Unlike other structural pastes such as plaster or joint compound, correctly mixed and applied grout forms a water resistant seal.

Method and System for Forming a Non-Circular Borehole

System and methods for creating shaped, non-circular boreholes in rocks especially for use with geothermal heat pump applications and for increasing wellbore support in applications such as horizontal oil and gas drilling are described. The systems and methods when applied to geothermal heat pumps create an elliptical shaped hole that is optimized for placing heat transfer tubes with a minimum of grout used. The significantly reduced cross-sectional area of the elliptical borehole also increases the overall drilling rate in rock and especially in hard rocks. In horizontal hard-rock drilling, creation of a horizontal non-circular borehole or modification of a circular borehole to a non-circular geometry is used to stabilize the borehole prior to casing insertion, and may also allow the use of lower mud pressures improving drilling rates. The system uses a non-contacting drilling system which in one embodiment uses a supersonic flame jet drilling system with a movable nozzle that swings between pivot points. In a second embodiment the elliptical shaped hole is created by an abrasive fluid or particle bearing-fluid or air jet drill that moves between pivot points. In another embodiment a non-contacting drill can use dual parallel nutating nozzles that create a pair of overlapping circular holes. The non-circular shaped hole is created by either the high temperature flame or water-particle jet or chemically active fluid jet as it removes rock material by erosion, dissolution and or thermal spalling. Modifications of circular boreholes to a generally elliptical shape can also be done using milling or jetting techniques.

Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting

InactiveCN101864967AImprove the strengthening effectWill not blockUnderground chambersTunnel liningSlurryHigh pressure
The invention relates to a strengthening and reinforcing method of a high-ground-pressure soft rock laneway by hierarchical grouting. Aiming at the deformation damage and crack distribution rules of laneway wall rock of high-ground-pressure soft rock, a hierarchical grouting mode for a shallow layer and a deep layer is adopted to hierarchically and emphatically strengthen and reinforce the shallow layer and the deep layer by grouting. The method comprises the following steps of: firstly, carrying out shallow-hole low-pressure grouting to a laneway shallow-layer gap development zone and then carrying out deep-hole high-pressure grouting to deep rock bodies; constructing shallow-hole grouting with small grouting pressure so that grout is scarcely diffused into the deep part, and grouting passages, such as a deep gap of the deep part and the like, are well preserved without blockage; and adopting a double-component chemical grout malisan with easy dispersion and strong permeability in constructing deep-hole grouting to realize deep high-pressure grouting on the basis of a formed grout-stopping shielding shell formed by former-period shallow-hole grouting so that the distribution compactness and the dispersion evenness of the grout in the deep grouting are improved, and the strengthening effect of the deep grouting on the wall rock is effectively improved. The method is simple and easy to implement.

Drilling and sealing method and sealing device for ultra-high pressure fracturing holes in underground coal mines

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.
Owner:重庆市能源投资集团科技有限责任公司 +1

Large diameter tunneling close range down-traversing small diameter subway tunnel distortion control method

The invention discloses a method for controlling distortion for deep large diameter shield tunnels to under-pass small diameter tunnels, which pertains to the technical field of tunnel engineering. According to the method, the control range of the stratum loss ratio of newly established tunnels and the optimum value of the support pressure of the shield cut surface are acquired by using the finite-element method; soil pressure in front of the shield cut surface is kept relatively balanced by setting the optimal value of the support pressure, and the support pressure fluctuation range of the cut surface is controlled to range from minus 10kPa to plus 10kPa; the stratum loss ratio of the newly established tunnels is controlled within the allowed range. According to the construction technique measures, a test propelling area is arranged before the shield reaches a cross position. In the area, construction is carried out according to the situation of the existing underground tunnels above; and construction parameters are controlled and regulated to adjust the support pressure, the propulsive velocity and the amount of the grout to be injected in time; the shield passes through the cross position in combination with the optimal values of the construction parameters of the test propelling area. The invention can not only ensure the construction of tunnels to be carried out safely and smoothly, but also minimize the influence of construction on ambient environment.

Prestressed drilling, anchoring and grouting anchor cable and support method

ActiveCN103382847AImprove stabilitySolve difficult access problemsAnchoring boltsUltimate tensile strengthMetal nail
Disclosed are a prestressed drilling, anchoring and grouting anchor cable and a support method. The prestressed drilling, anchoring and grouting anchor cable comprises a hollow grouting anchor cable, a sleeve, a lock, a washer and a tray, the hollow grouting anchor cable is provided with a sleeve head, a drill bit is arranged at the front end of the sleeve, and the sleeve is provided with an anchoring hole and a thread. The hollow grouting anchor cable drives the sleeve to drill holes and advances inwards through the thread in reverse rotation, a metal nail at the front end of the sleeve head punctures an anchoring agent package inside the sleeve, anchoring agents are mixed and then discharged through the anchoring hole in the sleeve, the gap between the sleeve and a drill hole wall is filled with the anchoring agents, and the anchoring function is achieved. An exhaust pipe is arranged in the anchor cable, the anchor cable is provided with a plurality of lantern-shaped grouting sections, and grout vent holes are formed in the lantern-shaped grouting sections. The prestressed drilling, anchoring and grouting anchor cable integrates drilling, exhausting, grouting and anchoring, the tail of the grouting anchor cable is firstly tensioned and fastened, grouting is then performed, an anchored body becomes reinforced pre-tightening force concrete, loose coal rocks are drilled, anchored, grouted and supported once, the problem that the anchor cable does not easily enter drilled holes in the loose coal rocks due to sticking and hole collapse is solved, the support strength of surrounding rocks of a roadway is enhanced, and the carrying capacity of a rock mass is improved. The prestressed drilling, anchoring and grouting anchor cable is simple in structure, low in cost, easy in construction and fine in support effect.

Gob-side entry retaining reinforcing filling body structure and construction method thereof

InactiveCN101975085AAchieving Early Bearer FeaturesSimple structureMaterial fill-upGroutMechanical engineering
The invention relates to a gob-side entry retaining reinforcing filling body structure and a construction method thereof. The method comprises the following steps of: making a filling bag into an enclosed oblong-shaped structure and sewing a plurality of small bags at the top edge of the filling bag and at the same position on two side faces along the filling direction, wherein the top small bag is used for filling feedstock and exhausting and a cross anchor is inserted into small bags on the side face for reinforcing a filling body and protecting sides; sewing hooks with certain densities inthe top central area of the filling bag and four side face lines which are certain distances away from the top of the filling bag, hanging the hooks on a top plate or four sides of a filling space, molding the filling body by using a reinforcement mesh and taking the reinforcement mesh as a reinforcing filling body for the cross anchor; before filling, inserting the cross anchor into the small bags on the side face, binding the small bags with a steel wire, putting a tray in place and screwing a screw cap; and during filling, plumping the filling bag until the filling bag is close to the roofby using the grout outlet pressure of a filling pump and enhancing anchor anchorage force to a preset value after the filling body reaches certain intensity so as to further realize the filling and reinforcing of the filling body. The structure is simple and is convenient to construct.

Solid polyurethane compositions, infrastucture repair and geo-stabilization processes

The present invention provides processes for infrastructure repairs and geo-stabilization with a low-exotherm polyurethane foam, grout or elastomer. The inventive process involves at least partially filling a cavity in the infrastructure or earth with a low-exotherm polyurethane foam, grout or elastomer made from at least one polyisocyanate, at least one isocyanate-reactive compound and an organic particulate material capable of absorbing heat, optionally in the presence of one or more chosen from water, surfactants, pigments, catalysts, alkali silicates and fillers and curing the polyurethane foam, grout or elastomer. The inventive processes may improve the repair of buildings, foundations, roads, bridges, highways, sidewalks, tunnels, manholes, sewers, sewage treatment systems, water treatment systems, reservoirs, canals, irrigation ditches, etc.; and in the geo-stabilization of mines, caves, wells, bore-holes, ditches, trenches, pits, cracks, fissures, craters, postholes, potholes, sinkholes, wallows, waterholes and the like. The inventive solid polyurethane compositions are made from at least one polyisocyanate, at least one isocyanate-reactive compound, and an organic particulate material capable of absorbing heat, optionally one or more chosen from water, surfactants, pigments, catalysts and fillers. Such solid polyurethane compositions may improve reaction injection molding (RIM), spray elastomer and cast molding processes.
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