30results about How to "Dense perfusion" patented technology

The invention relates to a prefabricated shear wall in a cast-in-situ connection mode. The prefabricated shear wall comprises a wall, pier heads, bottom upper concave sections and a bottom outer side plate. Side edges are respectively arranged on two sides of the wall, and a groove is formed in the middle of each side edge and is vertically perforated through the wall; wall vertical reinforcing bars are arranged in the wall; the bottom upper concave sections are uniformly distributed at the bottom of the wall; each pier head is arranged between the two corresponding adjacent bottom upper concave sections; air holes are formed in positions above the middles of the bottom upper concave sections; the air holes are communicated with the bottom upper concave sections via pipelines; the thicknesses of the pier heads are identical to the thickness of the wall, and holes are formed in the pier heads; the bottom outer side plate and the wall are integrated with each other, and the bottom outer side plate is positioned on the outer sides of the bottom upper concave sections; internally threaded pipes are embedded in positions close to the side edges of the wall, above the bottom upper concave sections and on the pier heads. The prefabricated shear wall in the cast-in-situ connection mode has the diversified advantages of firm structure, convenience in construction, reliability in connection and the like.

The invention discloses a retractable joint of a steel pipe concrete arch bracket and the arch bracket. The problem that a rigid connection joint in the arch bracket is prone to causing damage to thearch bracket is solved. The bearing capacity of an initial support of the steel pipe concrete arch bracket is ensured, and a support body has the retractable performance. When the load of surroundingrocks is enlarged, the arch brackets can be retracted to achieve the yield moderately and reduce the load acting on the support body, and the long-term stability of the support body is achieved. According to the technical scheme, the retractable joint of the steel pipe concrete arch bracket comprises an internally-inserted steel pipe, wherein the two ends of the internally-inserted steel pipe areinserted into a joint of the arch bracket. The outer portion of the internally-inserted steel pipe is sleeved with a joint sleeve. A compression limiting part is arranged on the outer side of the pipein the middle of the internally-inserted steel pipe in a sleeving mode. The compression limiting part is arranged between the arch bracket on the two ends of the internally-inserted steel pipe. Whenthe force of the arch brackets exceeds the voltage endurance capability of the compression limiting part, the compression limiting part displaces, then the joint of the arch brackets displaces, and the overall size of the arch brackets is reduced to achieve the yield.

The invention discloses a steel box component. The component is mainly composed of a U-shaped steel piece, n-shaped steel pieces and a steel tube which is arranged at a mid-span position of the U-shaped steel piece. The n-shaped steel pieces are arranged in U-shaped space at two ends of the U-shaped steel piece, the length directions of the n-shaped steel pieces are consistent with the longitudinal direction of the U-shaped steel piece, the lower ends of inner side plates of the n-shaped steel pieces are fixed on a bottom plate of the U-shaped steel piece and surround with the bottom plate of the U-shaped steel piece to form hollow pouring chambers with inner and outer ports, and pouring holes are opened on top plates of the n-shaped steel pieces. Vertical sealing plates are arranged at inner end openings of the pouring chambers, the steel tube is arranged in a suspension mode, steel openings at the two ends of the steel tube are connected onto the sealing plates respectively and blocked by the sealing plates; and gaps are arranged between the U-shaped steel piece and the n-shaped steel pieces and between the U-shaped steel piece and the steel tube. The invention further discloses a steel box-concrete combined U-shaped girder composed of the steel box component. By means of the steel box component and the steel box-concrete combined U-shaped girder composed of the same, the construction cost is saved, the construction period is shortened, the bearing capacity and the bending resistance at the girder support position are improved, and the reinforcement area and about 25% of dead-weight are reduced.

The invention discloses an underwater concrete pouring device, an underwater concrete construction method and application of the construction method in an ultra-large deep water open caisson foundation. The underwater concrete pouring device is composed of a plurality of pouring conduits, and the pouring conduits are provided with side openings or oblique openings. The underwater concrete construction method comprises the following steps: pouring anti-dispersion concrete at first to cover the shaft wall and the bottom of a base, and stopping for 5-10 min after pouring is completed; and pouringself-compacting concrete. The underwater concrete construction method is suitable for the construction of the ultra-large deep water open caisson foundation, the problems that underwater concrete ofthe ultra-large deep water open caisson foundation is quite prone to washing separation, the strength is obviously reduced and pouring is not compact can be effectively solved, and the engineering construction quality is guaranteed.

The invention discloses an assembly device and construction technology for a restraining concrete arch frame. The assembly device comprises a restrained concrete arch frame formwork, a vault adjustingdevice, two adjusting trolleys, and a laser aligning system. A sealed space for pouring concrete is formed in the restrained concrete arch frame formwork, and the vault adjusting device is arranged at the vault position of the restrained concrete arch frame formwork. The two adjusting trolleys are separately used for adjusting and locating two arch legs of the restrained concrete arch frame formwork, the two adjusting trolleys specifically comprise upper clamping components and adjusting supporting components, wherein the upper clamping components are provided with upward opening parts used for clamping the arch legs; and the adjusting supporting components can stretch and retract in the axial direction, the tops of the adjusting supporting components are fixedly connected with the bottoms of the upper clamping components, and the bottoms of the adjusting supporting components is fixedly connected with a load-bearing platform in a rotating mode along the vertical plane. The laser aligning system comprises laser launching receiving devices which are separately arranged on the vault adjusting device and the adjusting trolleys, and the degree of accuracy of the locating of the arch frame is determined based on laser receiving states of each laser launching receiving device and the relationship between the laser receiving states and a vertical positioning hammer arranged on the arch frame.

The invention discloses a confined concrete arch frame precise filling device and an efficient construction method. The device comprises a core filling component, a high-strength conveying pipe and ajoint ring buckle device; the core filling component comprises a joint plate; the high-strength conveying pipe is in embedded connection with the joint plate, and the connected place of the two is locked and fastened through the joint ring buckle device; an internal conveying pipeline is arranged in the joint plate for communicating with a grouting injection port of an arch frame; an opening is formed in the top of the joint plate; a pulp stop insertion plate capable of moving up and down is arranged in the opening; and the pulp stop insertion plate can fall to the bottom of the joint plate toblock the grouting injection port. In the filling device, the pulp stop insertion plate can be inserted in the filling component to block the injection port after completion of filling for timely pulp stop, so that the filling quality is guaranteed, the filling efficiency is improved, and the confined concrete arch frame supporting effect is improved.

The invention discloses an alternative grouting method for steel-structure column feet. The alternative grouting method comprises the following steps: arranging a template; sequentially and uniformlyforming N grouting holes in the upper part of the template at the first side of the original column feet, wherein N grouting holes comprise first grouting hole to N-th grouting holes, and N is greaterthan 1; sequentially and uniformly forming N overflow holes in the upper part of the template at the second side of the original column feet, wherein the N overflow holes comprise first overflow holeto N-th overflow hole, and the first overflow hole and the first grouting hole are oppositely formed; alternatively grouting, selecting an integer M from one to N sequentially, sealing other groutingholes except from the M-th grouting hole, grouting the M-th grouting hole until slurry overflows from the M-th overflow hole; repeatedly grouting, selecting the integer M from one to N sequentially,sealing other grouting holes except from the M-th grouting hole, grouting the M-th grouting hole until the slurry overflows from the N-th overflow hole. The alternative grouting method is used to sequentially grout the grouting holes until the corresponding overflow holes overflow, so that the grouting is more compact. The more stable and safer structure is guaranteed.

The invention discloses a mounting method of a concrete hollow anchor rod tool. When used for inverted mounting of a hollow anchor rod, the mounting method comprises the following steps: 1, a hole isformed and cleared, specifically, the straight hole (28) is drilled in rock or concrete (27) through a drilling rig, then the hole is broached through broaching equipment, and then the hole is clearedthrough a hole clearing device; 2, mounting is conducted, specifically, hollow self-bottom-expanding anchor bolts are assembled firstly, a rubber sleeve (30) sleeves a rod body (1) and is located ona middle rod (22) part, then the rubber sleeve (30) is glued to the rod body (1) through glue, and then the assembled hollow self-bottom-expanding anchor bolts are inserted into the straight hole (28); and 3, grouting is conducted, specifically, through an injector, a grouting material sequentially passes through a rod body inner hole (9) and a wedge block inner hole (24) and then is injected intothe hole bottom of the straight hole (28), after the grouting material overflows from an air guiding pipe (32) on a large scale, grouting is stopped, an anchor rod cap (29) is mounted at the exposedend (6) to block the rod body inner hole (9) to prevent the grouting material from flowing out, and after the grouting material is solidified, the hollow self-bottom-expanding anchor bolts are mounted.

The invention discloses a threaded pile drill pipe for reinforcing local silt layer and a method for pile formation of a foundation threaded pile including a silt layer. Threads are arranged on the surface of a pipe body of the drill pipe, the internal axis communicates with a pouring cavity up and down, the top end of the drill pipe is rotatably connected with a rotary jet grouting drilling rig distributing device, a power device sleeves the upper pipe body of the drill pipe, a powder ring cavity and an air ring cavity which are on the same axis with the pouring cavity are formed in the uppersection in the drill pipe, the rotary jet grouting drilling rig distributing device is internally provided with channels communicating with the drill pipe pouring cavity, the powder ring cavity and the air ring cavity correspondingly, and external inlets of the channels are used for being connected with a high-pressure flow concrete pump, a high-pressure powder pump and a high-pressure air pump correspondingly; and a round of spaced radial nozzles are formed in the circumferential surface of the pipe body in the middle of the drill pipe, concentric central powder spraying holes on the end faces of the nozzles externally surround air spraying holes, the powder spraying hole communicate with the powder ring cavity, and the air spraying holes communicate with the air ring cavity. The specialdrill pipe is used for reinforcing a silt sandwich layer during hole forming, and the threaded pile with the integral structure is formed.

The invention provides strength delayed concrete and an application thereof in A/B occlusive piles. In terms of dosage per cubic meter, the strength delayed concrete is prepared from components as follows: 150-350 kg of cement, 180-190 kg of water, 600-900 kg of sand, 1100-1250 kg of pebbles, 50-100 kg of an admixture and 3-7 kg of a retarder. The strength of the strength delayed concrete is increased slowly at the early stage, 7d strength is just 30%-50% of designed strength value under the natural curing condition, 28d strength can reach 100% or higher of the designed strength value, workability is good, and pouring is compacter. With application of the strength delayed concrete to the A/B occlusive piles, a pile A can be subjected to rotary excavating and cutting smoothly, and requirements of the pile A for soil blocking and water stopping can be met.

The invention provides a method for arching treatment of a steel clad panel of a refueling pool of a nuclear power plant, and relates to the field of nuclear power plant maintenance. The method specifically comprises the steps that S01, grouting preparation is carried out, specifically, a plurality of grouting holes are uniformly drilled in the steel clad panel and fixing holes are drilled in a concrete layer corresponding to the grouting holes, and slurry holes are uniformly drilled at the same time; S02, gravity grouting is carried out, specifically, grouting pipes are arranged on the grouting holes, and mixed grouting materials are poured into the grouting pipes through grouting funnels; S03, grouting plugging is carried out, specifically, anchoring nails welded to the bottoms of plugging blocks are placed in the fixing holes, and the plugging blocks are fixed to the grouting holes and grout outlet holes through spot welding; and S04, grouting is finished, after the grouting materials are solidified, the plugging blocks and the steel covering surface are welded, and devices except the refueling pool are disassembled. The gap between the steel clad panel and the concrete layer below the steel clad panel due to arching is evenly filled, and it is ensured that the steel clad panel does not deform and is good in sealing performance.