606 results about "Cement grout" patented technology

This invention deals with multi-component composite materials and techniques for improved shielding of neutron and gamma radiation emitting from transuranic, high-level and low-level radioactive wastes. Selective naturally occurring mineral materials are utilized to formulate, in various proportions, multi-component composite materials. Such materials are enriched with atoms that provide a substantial cumulative absorptive capacity to absorb or shield neutron and gamma radiation of variable fluxes and energies. The use of naturally occurring minerals in synergistic combination with formulated modified cement grout matrix, polymer modified asphaltene and maltene grout matrix, and polymer modified polyurethane foam grout matrix provide the radiation shielding product. These grout matrices are used as carriers for the radiation shielding composite materials and offer desired engineering and thermal attributes for various radiation management applications.

The invention discloses a grouting method of penetrability concrete cracks. The grouting method of the penetrability concrete cracks comprises the steps of drilling holes, burying pipes, sealing cracks and grouting. The drilled holes comprise inclined holes and roulettes. The inclined holes are preferably distributed in the same side or two sides of the cracks. The roulettes are distributed along the cracks to the bottom portions of the cracks. The pipes are buried by gelatinization materials. The cracks are sealed through the chisel groove method and the surface crack sealing method. With regard to stable and unexpanded penetrability concrete cracks (dead cracks) or compressive zone penetrability cracks, the grouting method of the penetrability concrete cracks adopts cement grout to conduct a grouting process, not only is the grouting method environment-friendly, economical and convenient to construct, but also quality effects meet engineering requirements. Besides, durability of materials is good, and strength of the materials is high.

The invention discloses an anchored roadbed widening method, which belongs to the technical field of road construction. The anchored roadbed widening method comprises the following steps of: firstly performing slope cutting on an old roadbed slope, then excavating a step on the old roadbed slope from the ground, obliquely drilling an anchorage hole into an old roadbed at the joint of the vertical plane of the step and the horizontal plane, placing a steel bar into the anchorage hole, and casting the steel bar and the old roadbed into a whole by pouring cement grout; laying a new roadbed in layers, rolling, flatly laying a geogrid on the step of the old roadbed when the new roadbed is filled to be aligned with the step of the old roadbed provided with the anchorage drilled hole, connecting a transverse rib of the geogrid with an end hook which is bent upwards of the exposed part of the steel bar, tensing the geogrid, fixing with the lower layer of a soil body, and finally filling soil on the geogrid and rolling. According to the anchored roadbed widening method disclosed by the invention, an anchor rod technology is used for reinforcing the old roadbed slope, the geogrid and the old roadbed are connected into a whole, the geogrid can be prevented from sliding on the step of the old roadbed, the stability of the new roadbed and the old roadbed is improved, and non-uniform sedimentation can be effectively controlled.

Heterocyclic and acyclic silane monomers and siloxane polymers, and their halogenated derivatives, are provided for the purpose of functionalizing surfaces or materials so as to render them biocidal upon exposure to oxidative halogen solutions. The biocidal function can be imparted either before or after bonding or adhesion to the surface or material. The biocidal surfaces and materials can then be used to inactivate pathogenic microorganisms such as bacteria, fungi, and yeasts, as well as virus particles, which can cause infectious diseases, and those microorganisms which cause noxious odors and unpleasant coloring such as mildew. Examples of surfaces and materials which can be rendered biocidal in this invention include, but are not limited to, cellulose, chitin, chitosan, synthetic fibers, glass, ceramics, plastics, rubber, cement grout, latex caulk, porcelain, acrylic films, vinyl, polyurethanes, silicon tubing, marble, metals, metal oxides, and silica.

The invention discloses a tunnel arch exchanging construction method. The tunnel arch exchanging construction method comprises the following steps of: constructing a temporary support under a tunnel transgression limit section, drilling grouting holes on arch part surfaces of tunnel primary supports, stretching steel floral tubes into the grouting holes, and grouting cement grout so as to reinforce a surrounding edge outside a tunnel excavating contour line; and setting lead tube sheds on the tunnel arch part along a circumferential direction, disassembling the primary supports finally and sequentially according to the distance of primary support steel arch frames, remaking one primary support after one primary support is disassembled, and alternately carrying out the operation of disassembling and remaking until all the arch exchanging constructions in the tunnel transgression limit section are finished. A construction structure disclosed by the invention comprises foundation beams, the temporary support and the steel arch frames, wherein foundation frames of the temporary support are arranged on the foundation beams, the top part of the temporary support is used for supporting the steel arch frames, the grouting holes and the lead tube sheds are uniformly distributed above the steel arch frames, the grouting holes are provided with the steel floral tubes, and the lead tube sheds are mainly formed by the steel floral tubes. The tunnel arch exchanging construction method and the construction structure, which are disclosed by the invention, have the advantages that the working procedure is simple and clear, the safety coefficient is high, the recovery degree of the bearing ability is quick, and the like.

The invention relates to a cement grouting steel bar connecting structure of a precast concrete unit. The cement grouting steel bar connecting structure is characterized in that steel bars connected by adopting cement grouting are butted, wherein a first connecting steel bar is embedded in a first constructional element body, simultaneously the first constructional element body is provided with a grouting connection cavity, the connection end of the first connecting steel bar is arranged in the grouting connection cavity; the inner wall of the grouting connection cavity is provided with a concave-convex rough surface; an annular metal stirrup with a longitudinal connection bar is arranged at the periphery of the grouting connection cavity along the length direction of the steel bar; the connection end of a second connecting steel bar embedded in a second constructional element body is inserted in the grouting connection cavity of the first constructional element body and is opposite to the end of the first connecting steel bar; at least one of the end parts of the first connecting steel bar and the second connecting steel bar is provided with an anchoring head, the diameter of which exceeds the original external diameter; and gaps between the inner wall of the grouting connection cavity and the connecting steel bars are filled with shrinkage-free cement or cement mortar.

The invention discloses a rock slope ecological protection method and relates to the field of rock slope ecological protection. The method includes that a slope surface of a rock slope is cleaned; multiple anchor rods are inserted into the rock slope, meanwhile, multiple holes are formed in a rock surface through drilling, and one water guide pipe is inserted into each hole; a layer of cement grout is sprayed; a steel mesh reinforcement is laid on the layer of solidified cement grout, and concrete is sprayed again for solidification; a batten is fixedly tied to each row of anchor rod and each column of anchor rod outside the solidified concrete layer; then a galvanized wire mesh is laid on the uppermost layer; borrowed soil is prepared and sprayed to the slope surface where the galvanized wire mesh is laid so as to cover the galvanized wire mesh; plant seeds are sprayed and seeded and then covered by non-woven fabrics, and the non-woven fabrics can be removed when seedlings grow to 5-6cm or 2-3 leaves come out. By means of the rock slope ecological protection method, plants are planted to cover the rock slope, the phenomena of loosening and rock scattering are avoided, potential safety hazards are eliminated, and the ecological environment is advantageously maintained.

The invention relates to a method for reinforcing a soft soil foundation by using cement-soil mixing piles. The method comprises the steps of 1) arranging pile positions on the soft soil foundation; 2) lifting a mixing machine to one pile position on the soft soil foundation by using a tower crane; 3) starting up the mixing machine, wherein a mixing head cuts soil while rotating and then sinks to design depth; 4) preparing cement grout; 5) lifting the mixing head, spraying the grout and performing mixing to enable the cement grout to be fully mixed with the soil till the mixing head is lifted up to the ground; 6) repeating the step 3 to the step 5, wherein each pile requires for re-mixing and re-spraying; 7) filling clean water into an aggregate bin, starting up a grout pump to clean residual grout in all pipelines and cleaning the mixing head; and 8) moving the mixing machine to the next pile position and repeating the step 2 to the step 7 to carry out the construction of the next pile. Compared with the prior art, the method for reinforcing the soft soil foundation by using the cement-soil mixing piles has the advantages that the water-cement ratio is proper, the goal of uniform mixing is easy to realize, the pile forming quality is high, the strength is high, the construction is convenient to carry out, the construction cost is low and the economic benefits are remarkable.

A magnesium concrete is composed of the magnesium cement grout prepared from light burnt magnesium oxide, magnesium chloride and water and the modifying filler composed of the phosphogypsum and/or the ash of rice husk, rice straw and wheat straw. It has low cost.

The invention discloses a retrograde sectional grouting device with a single grouting-stop plug and a method applicable to fractured rock masses. The retrograde sectional grouting device comprises aninner pipe, an output pipe, a water injecting pipe, the expansion-type grouting-stop plug, an inner pipe valve, an outer pipe valve, a water injecting valve, an inner pipe one-way valve and an outer pipe one-way valve, wherein the expansion-type grouting-stop plug is penetrated by the outer pipe and fixed on the outer pipe, the water injecting pipe is communicated with the interior of the expansion-type grouting-stop plug, water can be injected into the expansion-type grouting-stop plug through the water injecting water to enable the expansion-type grouting-stop plug to expand, the outer pipeis used for delivering cement grout, the outer pipe valve is arranged at the grout inlet position of the outer pipe, the outer pipe one-way valve is arranged at the grout outlet position thereof to prevent grout from flowing back, the inner pipe is arranged in the outer pipe and used for delivering water slurry, the inner pipe valve is arranged at the slurry inlet position of the inner pipe, and the inner pipe one-way valve is arranged at the slurry outlet position of the inner pipe to prevent the slurry from flowing back.

The invention discloses a method for reinforcing the soft soil foundation settlement control pile foundation bracket of a high-grade highway in use. The method comprises the following technical steps: partitioning the highway segment to be reinforced; constructing a hoard for the first partition; arranging the hole drilling position; drilling holes to the designed depth; ejecting high-pressure cement grout into the drill holes by using a cement-grout ejecting pipe, rotating and pulling to the top surface of a soft soil layer to form high-strength cement-soil piles with variable diameters; filling cement mortar into the drill holes so that the holes in the filling of the embankment are filled with the cement mortar to the bottom surface of the pavement structure layer; filling the drilled holes in the pavement structure layer range with asphalt surface material; repeating the steps until the construction of the whole highway is finished. During the construction of the highway, vehicles can run normally; the hole drilling causes less damage to the pavement structure layer; and the piles fulfill the function of supporting the embankment, so that the post-construction settlement of the subgrade of the highway is reduced greatly. The method provided by the invention adopts simple construction procedures, is convenient to operate, is economical and efficient and has a good implementation effect.

The present invention provides high speed magnetic suspension superposing rail beam connecting mechanism, rail beam and the manufacture process. The rail beam connecting mechanism includes bearing steel beam and welded nail, and has reinforced cement grouted connecting part in the middle part of the rail plate to connect the rail plate and the main bearing beam. The H-shaped bearing steel beam is embedded with welded nail on two ends of the rail plate and is born between the rail plate and the main bearing beam. The present invention realizes the reliable connection between the upper functional area of the rail beam and the rail plate and between the lower base and the main bearing beam, and has simple structure, easy manufacture, fast and convenient regulation and location, and low steel consumption.

The invention discloses a magnesium phosphate cement grout material, which belongs to the technical field of building materials. The magnesium phosphate cement grout material is prepared through the following components, parts by weight, 100 parts of phosphate, 100-400 parts of metal oxide, 5-150 parts of coal ash, 5-150 parts of grounded slag, 10-100 parts of thickening time control agent and 26-300 parts of water. According to the proportion, the metal oxide, the phosphate, the thickening time control agent, the coal ash and the grounded slag are mixed evenly and placed in a blender, water is added and the mixture is stirred evenly, and the magnesium phosphate cement grout material is obtained. The grout material has the advantages of being good in volume stability, large in flowing degree, indehiscent, high in early-stage strength, capable of constructing under the negative temperature and the like.

The invention relates to a new process for underground grouting and water-plugging. The underground grouting and water-plugging process can effectively ensure the diffusion radius and the diffusion range of serous fluid, and reduce the using amount of cement and the labor intensity of a worker by simultaneously grouting single and bi-liquid, and the underground grouting and water-plugging process comprises the following steps of: (1) drilling a grouting hole; (2) pressing water and washing the hole after water burst from the drilled hole; (3) manufacturing the serous fluid; (4) performing grouting and water-plugging operation; and (5) drilling the grouting hole, wherein collaborative injection of single-liquid cement grout and bi-liquid cement-water glass grout is adopted in the grouting and water-plugging operation in the step (4).

The invention provides a cement grouting material with self-compaction and high fluidity. The cement grouting material comprises anti-cracking mortar, flow promoting components, a plasticizer, coagulation delaying components and a coagulation accelerating component. The anti-cracking mortar comprises, by mass, 4-8% of Portland cement, 38-47% of sulfate aluminum cement, 42-52% of quartz sand, 4.6-4.9% of swelling agents and 0.1-0.4% of polypropylene fibers. The flow promoting components include water reducing agents and defoaming agents. The plasticizer is cellulose ether. The coagulation delaying components include one or more of tartaric acid, sodium gluconate and citric acid. The coagulation accelerating component contains calcium hydroxide. The cement grouting material can complete grouting on the condition of self-gravity and can be grouted successfully one time during high-altitude operation of a support and an inhaul cable pipeline of a bridge with no need for vibrating or secondary grouting; construction of the material is simple since it is only required to add water; the grouting material can be used in construction at a low temperature.

The invention provides a new technology for treating vehicle bump at bridge ends, which comprises the following steps: firstly drilling holes in soil at joints of bridge ends and highways; secondly injecting cement grout into the holes drilled in first step and strengthening deep soil layers and surrounding soil layers; and thirdly after the deep soil layers are hardened, continuing to inject the cement grout, jacking up road surfaces on the upper part at the same time of strengthening weak soil layers. The new technology of the invention has the beneficial effects of not only solving the vehicle bump at the bridge ends on in-use roads, but also saving construction cost and construction period compared with other methods, not influencing normal traffic, and fundamentally solving the vehicle bump at the bridge ends, thereby having important engineering practical value in weak soil areas and being worthy of development, promotion and application.

The invention relates to a continuous multi-shaft cement mixing pile device and a construction method; the multi-shaft continuous cement mixing pile device comprises a walking type main machine, a crawler type main machine, a winding engine, a guide rod, a steel wire rope, an air and grout inlet, a power head, a speed changing box, a reduction box, drill stems, middle supporting frames, lower supporting frames, winged drill stems, hoops, drill bits, air injection ports, grout spraying ports and a background cement grout stirring system, wherein the winding engine and the guide rod are fixed on the main machines, the power head is connected with a pulley arranged at the top end of the guide rod through the steel wire rope; the steel wire rope drives the power head to be lifted up and down; the power head is sequentially connected with the multiple drill stems through the speed changing box and the speed reducer; the middle supporting frames are arranged in the middle parts of the multiple drill stems; the lower supporting frames are arranged at the lower parts of the multiple drill stems; the winged drill stems are connected with the lower ends of the drill stems; the hoops are arranged on the winged drill stems; the drill bits are connected with the lower end of the winged drill stems; and the air injection ports and the grout spraying ports are arranged on the drill bits. Compared with the prior art, the continuous multi-shaft cement mixing pile device has the advantages of noiselessness, non vibration, ensured safety and quality, cost reduction, high efficiency, shortened construction period and the like.

The invention discloses a cement-polyurethane composite grouting process capable of blocking water fast. The cement-polyurethane composite grouting process includes the steps of a, performing engineering exploration, to be more specific, designing a plurality of holes after the optimal reaction positions of polyurethane grout are determined according to the stratum cracks or the flowability of flowing water, wherein the holes should communicate water leakage points as much as possible or penetrate a plurality of stratum cracks to allow one hole to penetrate multiple stratums; b, drilling; c, grouting, to be more specific, simultaneously and alternately grouting the polyurethane grout and cement grout into all holes, using the instant foaming and curing feature, which uses water to stop water, of the polyurethane grouted first to stop and block water, using the cement grout grouted later to stop the backflow of the polyurethane so as to form a structure with grouted holes and front blocking and back protection, and repeatedly and alternately grouting for multiple times until water burst is blocked; d, continuing grouting for a certain period of time after the water burst is blocked to guarantee that blocking is completed. By the arrangement, the cement-polyurethane composite grouting process is simple in procedures, capable of blocking water fast, and capable of integrating blocking and reinforcing.

The invention relates to a pile side post-grouting grouting device and the construction method thereof, including a ground grouting device and an underground grouting device; the underground grouting device is composed of a pile body grouting guide pipe and an inner pile grouting device; both ends of the pile body grouting guide pipe are connected with the ground conveying pipe and the pile side grouting device; the pile body grouting guide pipe is distributed along the grouting section, fixedly bound with the main rib of the steel reinforcement cage and is arranged in a drilled hole togetherwith the steel reinforcement cage; the pile side grouting device is composed of an annular high-pressure hose and a grouting device; the annular high-pressure hose is communicated with the pile body grouting guide pipe and is fixedly connected with the bored pile steel reinforcement cage. During the pile forming process of the bored pile, the pile side post-grouting grouting device and the construction method prearrange the grouting pipelines on a plurality of positions on the pile body, distribute the annular high-pressure hose outside the grouting section and mount the grouting device; a high-pressure grouting pump is adopted when pile body concrete reaches certain strength; the cement grout is injected into the pile lateral through the grouting pipelines to improve the pile lateral mudcover; the pile lateral soil mass intensity is improved at the same time, so as to improve the bearing capacity of the pile and reduce the skirt pile settlement.

The invention discloses a method and a structure for reinforcing flat hole grouting roadbed without damaging road surface. The method comprises the following steps of A. determining the positions of grouting holes; B. drilling horizontal or slant grouting holes to ensure that the drilling angle is orthogonal to the main damaging direction of the roadbed; C. striking the grouting holes in an interlaced mode; D. drilling and grouting from the periphery of the damaged roadbed to the inside; E. arranging grouting floral pipes; F. arranging seamless grouting outer pipes at the front ends of the grouting holes which penetrate through the cross section of the roadbed and are dimensionally and crossly distributed; G. uniformly filling cement grouts and determining grouting pressure through tests and areas; and H. performing sedimentation, inclination, deformation and displacement observation on the roadbed surfaces, structures and surrounding buildings during grouting. Horizontal or inclined drilling is carried out on roadbed slopes in the affected area for forming the grouting holes, the grouting floral pipes and the seamless grouting outer pipes are arranged, and the grouting floral pipes are connected with the seamless grouting outer pipes by virtue of joint by screws. The method is feasible and convenient to carry out; because of no-damage road surface structure, the bearing capacity and the stability of the roadbed structure in the affected area are obviously improved, and the reinforcement effect is high.