30results about How to "Saving concrete" patented technology

The invention discloses a method for plugging a diversion tunnel by cast-in-situ reinforced concrete without cutoff by a gate and a plugging reinforcing cage. The method for plugging the diversion tunnel by the case-in-situ reinforced concrete without cutoff by the gate and the plugging reinforcing cage have the advantages that the process of closing the gate for the diversion tunnel can be removed, the project amount of gate concrete is reduced, and meanwhile concrete plugging can be conducted in the process that normal stream diversion is achieved in the diversion tunnel. The plugging reinforcing cage is fixedly provided with a plurality of drain pipes, after a plurality of plugging reinforcing cages are assembled and combined, a cross sectional area is just the cross sectional area of the diversion tunnel, the plugging reinforcing cages are sequentially placed inside the diversion tunnel, or the diversion tunnel is divided into a plurality of areas to be respectively provided with mesh reinforcing frames with drain pipes in an erecting mode, concrete is sequentially poured, when the concrete strength reaches a design requirement, a gate of the drain pipes is closed, normal pouring is conducted to plug concrete on the back face of the gate, and the gate is poured in the concrete.

A construction method of a composite pile comprises the steps of (1), sinking a steel sleeve into the center soil layer of a pile position in a vibrating mode or a hammering mode or a static pressure mode, wherein the diameter of the steel sleeve is larger than the diameter of a core pile by 10-80 cm, and the maximum length of the steel sleeve is 40 m; (2), taking out soil bodies in the steel sleeve or below the steel sleeve by a certain depth through a long auger or a rotary drilling rig or a grab bucket; (3), spraying cement paste and gas to the soil layer at the lower portion of the steel sleeve through a speed-variable agitator, agitating the soil and the cement paste to form uniform pasty cement soil at the same time and agitating the soil within the range of 1-3 meters at the pile tip repeatedly, wherein the number of times of vertical agitation is not smaller than 4; (4), implanting the rigid core pile into the steel sleeve in an inserting mode or a vibrating mode, wherein the pasty cement soil overflows and fills the portion between the rigid core pile and the steel sleeve in the implanting process of the rigid core pile, pulling out the steel sleeve before initial setting of the cement soil, and forming the composite pile after the pasty cement soil is hardened. According to the construction method, in the pile implanting process, mud discharging and soil squeezing effects are avoided.

The invention relates to the technical field of steel suspension boxes, in particular to a steel suspension box side plate and base plate connection device without top seal concrete and a constructionmethod thereof. The steel suspension box side plate and base plate connection device is characterized by comprising a base plate 11, supporting beams 10 and limiting grooves. The base plate 11 is installed on the supporting beams 10 with L-shaped rabbets 9 in end portions. Each L-shaped rabbet 9 is provided with one limiting groove. A side plate structure is installed on the limiting grooves in aconnected manner. According to the construction method of the steel suspension box side plate and base plate connection device without top seal concrete, construction is carried out according to a site construction drawing. The steel suspension box side plate and base plate connection device without top seal concrete and the construction method thereof have the characteristics that the concrete needed for bottom sealing of the steel suspension box can be omitted, a large amount of concrete can be saved, the good water stop effect can be achieved, installation and detachment are convenient tocarry out, the structure is solid, safe and reliable, a construction safety factor is high, and so on.

The invention provides a telescopic mobile chute tube which is mainly used for concrete pouring in the field of constructional engineering and is high in pouring efficiency and capable of saving concrete and reliving the labor intensity of workers. The telescopic mobile chute tube is mainly composed of a vehicle frame, wheels, a stand rack, a hydraulic cylinder, a hydraulic piston, a telescopic rod, mobile racks, a fixed chute tube body, a plurality of mobile chute bodies and a feed hopper. According to the main working principle of the telescopic mobile chute tube, concrete slides over the fixed chute tube body and the mobile chute bodies from top to bottom, slides out of the mobile chute tube body at the foremost end and enters a pouring point; if the concrete needs to be poured to a place far away, the telescopic rod is rightwards stretched, the front end of the telescopic rod drives the mobile chute tube body at the foremost end to forwards move, and when a limiting ring of the mobile chute tube body at the foremost end makes contact with a limiting ring of the second section of mobile chute tube body, the second section of mobile chute drum body is pulled out, and in the same way, the other sections of mobile chute tube bodies are pulled out; and the inclination angle and the height of concrete discharging can be changed by stretching and retracting the hydraulic piston.

The invention discloses a prefabricated concrete pipe pile for an overhead power transmission line. The prefabricated concrete pipe pile comprises a hollow pipe pile and a pile head; the hollow pipe pile comprises an upper pipe pile and a lower pipe pile, the outer diameter of the upper pipe pile is larger than that of the lower pipe pile, and a screw is arranged on the exterior of the lower pipe pile; a pile expanding device is arranged on the lower pipe pile and comprises two arc-shaped grooves which are formed in the symmetrical positions of the same circumference of the lower pipe pile, an annular steel plate matched with the corresponding arc-shaped groove is hinged to the bottom of each arc-shaped groove, the tail end of each annular steel plate stretches out of the corresponding arc-shaped groove, and the direction that the annular steel plates are arranged in the arc-shaped grooves is consistent with the screwing-in direction of the screw. According to the prefabricated concrete pipe pile for the overhead power transmission line, foundation settlement can be reduced, the rigidity of the pipe pile can be improved, the using amount of concrete can be decreased, and the construction cost of the prefabricated pipe pile can be reduced; in addition, the strength of the concrete is high, the contact area of the prefabricated pipe pile and soil mass is large, and therefore the bearing capacity of the prefabricated pipe pile can be enhanced.

The invention discloses an improved type telescopic movable chute tube. The improved type telescopic movable chute tube is mainly used for pouring concrete in the field of constructional engineering. The improved type telescopic movable chute tube is high in pouring efficiency, concrete is saved, and the labor intensity is relieved. The improved type telescopic movable chute tube mainly comprises a vehicle frame, wheels, an n-shaped vertical frame, a hydraulic cylinder, a hydraulic piston, a telescopic rod, a movable frame, a fixed chute tube body, movable chute tube bodies, a feed hopper, a front support device and an n-shaped frame. According to the main working principle of the improved type telescopic movable chute tube, the concrete slides over the fixed chute tube body and the multiple movable chute tube bodies from top to bottom, slides out from the movable chute tube body at the most front end and enters a pouring point; if the concrete needs to be poured to a far place, the telescopic rod is stretched rightwards, the front end of the telescopic rod drives the movable chute tube body at the most front end to move frontwards, after a limiting ring of the movable chute tube body at the most front end touches a limiting ring of the second section of movable chute tube body, the second section of movable chute tube body is pulled out, and in the same way, the rest sections of movable chute tube bodies are pulled out; and the hydraulic piston is stretched out or retracted, and the inclined angle of concrete discharge and the discharge height can be changed.

The invention discloses an assembly type box culvert prefabrication installation construction method, an assembly type box culvert comprises a plurality of mutually connected box culvert sections and holes at two ends, each box culvert section comprises a top plate, a bottom plate and side walls, two ends of each top plate are respectively spliced with the side walls, the bottoms of the two side walls are in cast-in-place connection, a cast-in-place part is the bottom plate, and a cast-in-place part is connected with the bottom plate; the top plates, the bottom plate and the two side walls form a box-shaped channel, supporting feet protruding outwards are arranged at the bottoms of the side walls, two connectors of the top plates and the side walls are in an elbow shape and are freely hinged, and when different box-shaped culvert sections are connected, the top plates are connected through bent bolts. Prefabrication can be performed in the field in advance, the construction time is greatly shortened, the construction period is shortened, and civilized and green construction is promoted; during excavation construction, the working face is small, and damage and pollution to ground surface underground water and soil are greatly reduced; the quality of the culvert can be effectively improved, the appearance and the percent of pass of a protective layer are greatly improved, and good economic and social benefits are achieved.

The invention discloses a construction method of a piled anchor and liquid nitrogen frozen earth wall combined support system. The construction method comprises the following steps of 1, uniformly arranging slope protection piles along the edge of a foundation pit, wherein the slope protection piles are long auger drilling cast-in-situ bored piles; 2, driving anchor rods into the stratum in an inclined manner, and anchoring the anchor rods through lock beams after the anchor rods penetrate the slope protection piles and are stretched; and 3, arranging a frozen earth wall in foundation soil, and anchoring the frozen earth wall and the anchor rods together by means of the freezing effect of the liquid nitrogen frozen earth wall. The construction method has the advantages that the construction method is good in waterproofness and can adapt to various complex environments and geological conditions; steel and concrete are saved, and safety and environmental friendliness are achieved; and the freezing speed is high, and freezing strength is high.

The invention belongs to the technical field of underground structure engineering, and particularly relates to a bottom plate structure with a rock foundation, of an underground structure. The bottom plate structure with the rock foundation is characterized by comprising columns, side walls, a bottom plate, bottom plate longitudinal beams, a concrete cushion layer, the rock foundation and soft cushion layers, wherein the side walls and the bottom plate longitudinal beams are arranged above the bottom plate; the columns are arranged on the top surfaces of the bottom plate longitudinal beams; the concrete cushion layer is arranged at the bottom of the bottom plate; the rock foundation is arranged at the bottom of the concrete cushion layer; and the soft cushion layers are arranged at the bottom of the concrete cushion layer. According to the invention, stresses on the bottom plate and the sidewalls of the underground structure, the thicknesses of the bottom plate and the sidewalls, and reinforcements of the bottom plate and the sidewalls, can be reduced, thus anti-floating pile construction can be omitted, and raw materials can be saved; and good vertical bearing capacity and water isolation performance of the rock foundation are adequately utilized, thus the stresses on the bottom plate and the bottoms of the sidewalls can be reduced, concrete and steel bars can be saved, and engineering costs can be decreased.

The invention discloses an upper-expansion cement composite pile which comprises a precast concrete tubular pile, wherein a center hole is formed in the precast concrete tubular pile and filled with a first cement pile; a second cement pile is arranged outside the precast concrete tubular pile; the second cement pile comprises upper and lower sections; the pile diameter of the upper section is greater than that of the lower section; and a first variable-diameter section is arranged between the upper section and the lower section. Compared with a single-diameter pile body of the same length and equal concrete dosage, the upper-expansion cement composite pile disclosed by the invention has larger pile foundation bearing capacity; on the premise of meeting the bearing force design requirements, relatively short pile is realized; and meanwhile, the capability development of the side resistance of the pile foundation is stronger, and the upper-expansion cement composite pile is particularly suitable for the geological conditions that upper soil is obviously superior to lower soil.

The invention belongs to the technical field of pile foundations, and provides an anchor tensioning device for an integrated pipe pile. The device comprises a set of precast concrete members and pilesA, wherein the precast concrete members form a pile body, and each precast concrete member comprises a pile batten plate, an anti-slip constraint ring and an end pressing seat, the pile batten platesare vertically and annularly arranged on the periphery of the annular pipe pile, the end pressing seats are located at the bottom end of the integrated pipe pile and bears end resistance, the pile batten plates are restrained and fixed in the vertical direction and the radial direction, the anti-sliding restraining rings are horizontally arranged at the up-down splicing positions of the pile batten plates and restrain vertical and radial displacement of the pile batten plates, the anchor tensioning device tensions and integrates all concrete members into the pile body, and the piles A are arranged on the peripheries of the pile batten plates and the inner side of pile hole wall soil body and used for transmitting positive pressure and frictional resistance of the pile hole wall soil body.The device has the advantages of cost reduction, convenient construction, energy saving, environmental protection, quality improvement, reduction of on-site manual operation, and has substantial economic and social benefits.

The invention discloses a membrane shell material used for a multi-ribbed floor system. The membrane shell material comprises the following raw materials in parts by weight: 40 to 60 parts of aluminoferrite cement, 20 to 25 parts of fluorgypsum, 20 to 25 parts of composite gypsum, 6 to 10 parts of fly ash, 10 to 15 parts of glass fiber gridding cloth, 5 to 10 parts of chopped glass fibers, 10 to 20 parts of glass water, 2 to 5 parts of a coagulant and 40 to 60 parts of water. The preparation method comprises the following steps: (1) weighing all raw materials; (2) stirring the aluminoferrite cement, the fluorgypsum, the composite gypsum, the fly ash and a first part of the glass water, and carrying out standing; (3) adding the chopped glass fibers, a second part of the glass water, the coagulant and the water; and (4) uniformly spraying an obtained mixture into a mold by a plurality of times, and carrying out drying in the air, and carrying out molding. The membrane shell used for themulti-ribbed floor system does not absorb water or seep water, is light in material, short in molding period, high in strength, firm and durable, and can be widely applied to large-span and large-baycast-in-place reinforced concrete multi-ribbed floor buildings in industrial and civil buildings.

The invention provides a concrete frame structure which comprises a joint, an upright column and a cross beam forming a concrete frame, wherein the outline dimension of the section of the joint is equal to the outline dimension of the maximum section connecting the upright column and the cross beam; the upright column is provided with a vertical mortise along the axial direction of the upright column; the cross beam is provided with a transverse mortise along the axial direction of the cross beam; the joint is provided with 1-6 tenons which are tightly combined with the upright column or the cross beam through the end of the vertical mortise or the transverse mortise; and the joint and the upright column and the cross beam connected with the joint form the concrete frame together. In the invention, the design principles of 'strong joints and weak bars', 'strong columns and weak beams', 'strong shearing and weak bending' and the like are simultaneously realized in the concrete frame structure, so that the concrete frame structure has an excellent energy dissipation mechanism under the earthquake effect, is favorable for resisting the earthquake, can save concrete and reduces the self weight of the structure.

The invention discloses an h-shaped hollow anti-slide pile which comprises a front pile and a rear pile. A cross beam is connected between the front pile and the rear pile, the front pile comprises afirst pile front end and a first pile rear end, a first hollow hole is formed between the first pile front end and the first pile rear end, and the rear pile comprises a second pile front end and a second pile rear end. A second hollow hole is formed between the second pile front end and the second pile rear end, a front pile protruding block is arranged at the position, close to the cross beam, of the front pile, a rear pile protruding block is arranged at the position, close to the cross beam, of the rear pile, and the front pile protruding block and the rear pile protruding block are both located below the cross beam. The bottom of the front pile and the bottom of the rear pile penetrate through a sliding belt and are located in a sliding bed, the top of the front pile and the top of the rear pile are located in a sliding body, first steel bars are embedded in the front pile, and second steel bars are embedded in the rear pile. The h-shaped hollow anti-slide pile has the beneficialeffects that the soil arch effect of soil between piles is brought into full play, and supporting of the anti-slide pile to landslides is better facilitated.