30results about How to "Dense perfusion" patented technology

The invention discloses an underwater concrete pouring device and construction method and its application in super large deep water caisson foundations. The underwater concrete pouring device of the present invention is composed of several pouring conduits, and the pouring conduits are provided with side openings or oblique openings. The steps of the underwater concrete construction method are as follows: first pour anti-dispersion concrete, cover the well wall and the bottom of the base, and then stop for 5-10 minutes; then pour self-compacting concrete. The underwater concrete construction method of the present invention is suitable for the construction of super large deep water caisson foundations, and can effectively solve the problems that the underwater concrete of super large deep water caisson foundations is easily washed and segregated, the strength is significantly reduced, and the pouring is not compact, so as to ensure the construction quality of the project.

The invention discloses a threaded pile drill pipe for reinforcing a local mud layer and a threaded pile forming method for a foundation thread pile containing a mud layer. Spray drilling tool splitter, the upper part of the drill pipe is socketed with the power unit, the inner upper part of the drill pipe is provided with a powder ring cavity and an air ring cavity coaxial with the filling cavity, and the rotary jet drilling tool splitter is equipped with a corresponding connected drill pipe The passages of the pouring chamber, the powder ring chamber and the air ring chamber are respectively used to connect the high-pressure fluid concrete pump, the high-pressure powder pump, and the high-pressure air pump at the outer entrances of each passage. The radial nozzle, the end face of the nozzle is a concentric central powder injection hole and an outer ring air injection hole, the powder injection hole is connected with the powder ring cavity, and the air injection hole is connected with the air ring cavity. Use this special drill pipe to reinforce the silt sandwich layer when forming a hole to form a threaded pile with an overall structure.

A method for handling arching of steel cladding panels in refueling pools of nuclear power plants, which relates to the field of nuclear power plant maintenance, and the specific method includes: step S01, grouting preparation, uniformly drilling a number of grouting holes on the steel cladding panels and corresponding grouting holes Drill fixing holes on the concrete layer, and at the same time drill out the grout holes evenly. Step S02, grouting by gravity, setting a grouting pipe on the grouting hole, pouring the prepared grouting material into the grouting pipe through the grouting funnel. Step S03, grouting and plugging, placing the anchor nails welded together with the bottom of the plugging block in the fixing hole, and the plugging block is fixed at the grouting hole and the grouting hole by spot welding. Step S04, the grouting is finished, and after the grouting material is solidified, the plugging block is welded to the steel cladding, and the devices except the refueling pool are removed. The invention evenly fills the gap between the steel cladding panel and the lower concrete layer due to arching, so as to ensure that the steel cladding panel is not deformed and has good sealing performance.

The invention relates to a surgical instrument, in particular to an improved pourable pedicle screw. At least one axial groove (5) communicated with a seepage hole (4) is arranged on the outer surface of a screw body (1) of the pedicle screw. The improved pourable pedicle screw is characterized in that an exhaust hole (6) enabling a thread groove (9) to be communicated with the air is arranged on the periphery of a blind hole (3) and on a screw end (2) of the pedicle screw, and a flow adjusting valve is arranged in an outlet of the exhaust hole(6). The flow adjusting valve is formed by an outlet portion (8) of the exhaust hole (6) and a valve core (7) matched with the outlet portion (8), wherein the valve core (7) is formed by a cylinder and a cone with the gradually-reduced section in sequence from the port of the outlet portion (8) of the exhaust hole (6), and the cylinder is in threaded connection with the outlet portion (8) of the exhaust hole (6). The improved pourable pedicle screw has the advantages of achieving fully pouring and having good fixing effect.

The invention belongs to the technical field of tunnel lining construction, and in particular relates to a construction method for vibrating tunnel vault concrete. The specific steps include: 1. measuring and marking lines; 2. presetting corrugated pipes; 3. installing lining formwork; 4. pouring concrete ; 5. Attached vibrator; 6. Inserted vibrator; 7. Perfusion bellows. The construction method for vibrating the concrete of the tunnel vault in the present invention improves the vibrating quality by adopting the mode of coordinating the attachment type vibrating and the inserting type vibrating.

The invention discloses a fully prefabricated concrete floor connection node. The connection node comprises: a prefabricated concrete floor slab, a plurality of groups of connection grooves are preset at intervals on the connection side, and the connection grooves are composed of a horizontal groove on an upper board surface, a horizontal groove on a lower board surface and a side surface. It is composed of vertical grooves, and the horizontal grooves on the upper board surface and the horizontal grooves on the lower board surface are connected through the side vertical grooves; the connecting pieces include embedded steel connecting pieces and connecting steel plates. Steel chute, the steel chute at least allows the adjacent precast concrete floor slabs to produce lateral sliding; the grouting material is poured in the connection node after the adjacent precast concrete floor slabs are spliced. The connecting node of the invention can significantly improve the in-plane shear resistance, bending stiffness and tensile bearing capacity of the fully prefabricated floor slab, and ensure the deformation coordination of the slab joints when bearing vertical loads and explosion impact loads. The invention relates to a fully prefabricated assembled floor slab, which has the advantages of reliable performance, simple structure, rapid construction, green environmental protection and the like.

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 present invention discloses a construction method for planting reinforcement bars in deep holes by a massive concrete structure, and relates to a construction method for the reinforcement and compensation project of the massive concrete structure. The utility model has the embodiment that: firstly, the plane position for embedding the reinforcing steel bars is determined in accordance with thedesign requirement, holes are drilled by a drilling machine, the hole wall is smoothed and the holes are cleaned, and the two pre-embedded reinforcing steel bars, an infusion tube and a centering supporting frame are bond, an outer ring positioning ring is suited outside, the bond reinforcing steel bars are arranged inside the drilling holes, and the reinforcing steel bars and the centering supporting frame are contacted with a bottom hole, the grouting material is perfused into the drilling holes through the infusion tube by using an injection pump; in the injection process, the infusion tube is extracted out upward gradually, the infusion is operated continuously until the hole is fully filled, the reinforcing steel bars can be disturbed within 24 hours, and the bar planting is completed after 48 hours. The present invention can improve the strength of the massive concrete structure without changing the former section size of the concrete structure, and the additionally arranged reinforcing steel bars are firmly connected with the former structure. The invention method is simple, and has strong practicability and lower construction cost; the continuous pressure perfusion is adopted to ensure that the grouting material is compact without holes.

The invention discloses a precise pouring device and a high-efficiency construction method for constrained concrete arches, including a core pouring component, a high-strength delivery pipe, and a joint buckle device; The connection between the two is locked and fastened by the joint ring buckle device; the connecting plate has an internal delivery pipeline to communicate with the grouting inlet of the arch frame, an opening is set on the top of the connecting plate, and a grout blocking plate that can move up and down is arranged in the opening , The grout blocking plate can drop to the bottom of the connecting plate to block the grouting inlet. With this pouring device, after the pouring is completed, the grout blocking plate can be inserted into the pouring member to seal the pouring port, the grout can be stopped in time, the pouring quality can be ensured, the pouring efficiency can be improved, and the support effect of the confined concrete arch can be improved.

The invention relates to a pouring method of concrete in a cross-stay tube between arch ribs of a steel pipe bridge. The two ends of the brace tube, wherein, the hole at the bottom of the brace tube is a grouting hole, and the hole at the top of the brace tube is a grout hole; step 2, the first brace tube The grout hole is connected to the grouting hole of the second brace pipe with a pump pipe ..., and the grout hole of the n-1th brace pipe is connected to the grouting hole of the nth brace pipe hole; step 3, connect the concrete delivery pump pipe with the grouting hole of the first cross-bracing pipe, perform concrete pouring, and stop pumping when the concrete flowing out of the grouting hole of the n-th cross-bracing pipe contains aggregate , close the valve of the pump pipe, the pouring of one horizontal support pipe assembly is completed, and the concrete pouring of the next horizontal support pipe assembly is performed. The pouring method can effectively shorten the construction period and improve the safety of construction and environment.

The invention discloses an underground construction fabricated confined concrete lagging jack and a mechanized construction method. In order to be matched with lagging jack intelligent mounting equipment to conduct tunnel construction, the fabricated confined concrete lagging jack is researched and developed, the relevant technologies of folded hoisting, mechanized assembly, accurate positioning,fracture surface reexamination and the like of the lagging jack are broken through, the lagging jack being lifted manually to be split is not needed in the tunnel construction process, and the whole set of construction process can be conducted through a mechanized manner, and is safer and more efficient. The mechanized construction method specifically comprises the construction steps that (1), thelagging jack is folded and hoisted; (2), the lagging jack intelligent mounting equipment is utilized to conduct sequential extending on the lagging jack, fabricated joints are automatically clamped,and a longitudinal connection device is mounted in advance; (3), clamping buckle lifting, accurate positioning and clamping fixing are conducted; (4) fracture surface reexamination is conducted; (5) core concrete is poured; and (6) the compactness is detected and a key part is reinforced.

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 discloses lime-based micro-contraction grouting material composition and relates to the technical field of materials for brick and stone historical relic protection. The composition is prepared from components in percentage by weight as follows: 30%-60% of aggregate, 30%-60% of natural hydraulic lime, 3%-9% of an expanding agent, 3%-8% of active micropowder and 0.8%-1.6% of an auxiliary. The micro-contraction grouting material has good compatibility with traditional brick and stone materials in physical and chemical property as well as relatively high strength, besides, micro volume expansion can be produced after the grouting material is poured into gaps due to reasonable introduction of the expanding agent, so that the grouting material can be closely combined with bricks and stone serving as a base material, and more compact grouting is realized.