626results about How to "Shorten the construction period" patented technology

The present invention relates to a construction method of underground railway shield-driven running tunnel interconnecting channel. It is characterized by utilizing steel segments of downward tunnel to make grid front earth-cutting device, connecting said grid front earth-catting device with pipe-jacking equipment to form grid squeeze-type pipe-jacking machine, jacking to upward tunnel from downward tunnel and adopting prefabricated composite steel pipe components to assemble them to form the invented interconnecting channel. Said onstruction, method includes the following processes; consolidating earth body in tunnel portal entrance and exit zone, jacking axis measurement setting-out, creating concrete pipe segment supporting system, jacking pie and making pipe go out of tunnel, setting water-proofing seal rubber band, laying guideway, arranging stress-releasing holes, blocking tunnel portal and grouting mortar, etc.

The invention relates to heat exchange equipment, in particular to a box type high-voltage heater. The box type high-voltage heater comprises a water inlet chamber, a water inlet pipe plate, a water outlet chamber, a water outlet pipe plate and a plurality of heat exchange pipes, wherein two ends of each heat exchange pipe are connected together with the water inlet pipe plate and the water outlet pipe plate. The high-voltage heater is characterized by further comprising a pair of cylinder-shaped headers having functions of both tube plates and water chambers, the interior space of one header forms the water inlet chamber; the surrounding walls of the header form the water inlet pipe plate; the interior space of the other header forms the water outlet chamber; the surrounding walls of the latter header form the water outlet pipe plate. The high-voltage heater provided by the invention solves the problems that when a current high-voltage heater is applied to a thermal power generating unit above 750 MW, a thick tube plate and a thick sealing head are indispensable parts, the manufacturing is inconvenient, the application risk is high, the quality risk is high, and the current high-voltage heater is not suitable for variable load operation and peak-load regulation operation.

The invention provides a multi-row and multi-shaft cemented soil mixing pile drilling machine. Mixing pile machine drilling rods are distributed in a multi-row mode, n drilling rods are distributed in each row, cemented soil mixing piles of many rows can be constructed at a time, cold joints of lap joint are reduced, the labor cost is greatly reduced, the construction period is shortened, the construction quality is improved, and the construction cost is lowered.

The invention provides a concretion method for ultra-soft foundation, comprising the steps as follows: geotextile is paved on the soft foundation and a bamboo rod grid is paved on the geotextile; plastic drainage plates are inserted; horizontal water permeable pipes are paved; the plastic drainage pipes are close to and surround the horizontal water permeable pipes, and are connected to a vacuum-pumping device; a vacuum film is covered and pressed and the vacuum is pumped. By adopting the concretion method provided by the invention, compared with the construction which adopts normal types (such as vacuum pre-pressing method or pile loading pre-pressing method) at home and abroad, as the sand cushion layer is not used, the construction can save manufacture cost by 35-70RMB/m<2>, furthermore, shorten the construction period by more than 20%, and ensure convenient and safe operation.

The invention relates to an intelligent LED lamp controller and a control method. The intelligent LED lamp controller is provided with a parallel connection/serial connection conversion unit which is connected with a decoding module. When all LED lamps are not subjected to address code writing and normally receive data transmitted by a DMX512 signal generator, the input RS485 bus and the output RS485 bus of the lamps are in parallel connection, namely the lamps are connected in parallel to a public RS485 bus through the input RS485 bus and the output RS485 bus to perform data communication with the DMX512 signal generator; and when an addressing device codes address codes for the lamps, the decoding module controls the parallel connection/serial connection conversion unit to change the parallel connection of the input and output RS485 buses in the lamps into serial connection. The intelligent LED lamp controller has the advantages that: the failure of one lamp cannot influence other lamps, and the assembly sequence and positions of the lamps can be changed freely, the lamps are serially connected during automatic addressing, and the lamps of the whole system are communicated in parallel through the buses once the address is coded.

A fluid connector is provided for a biopsy system that includes a vacuum assisted biopsy device, a first fluid source and a second fluid source. In an embodiment, the fluid connector includes a body member having a first input port, a second input port and an output port. The first input port includes a first check valve in fluid communication with the first fluid source, the second input port includes a second check valve in fluid communication with the second fluid source and the output port is provided in communication with the vacuum assisted biopsy device. A biopsy system including a fluid connector of the present invention is also provided.

The invention discloses a curing agent for sludge solidification and stabilization. The curing agent contains the following ingredients by weight percentage: 20-40% of Portland cement, 10-30% of fly ash, 10-30% of lime, 10-30% of ferrous sulfate and 5-12% of inorganic salt, wherein the inorganic salt is one or a combination of more than two selected from aluminum salt, calcium salt, sodium salt and magnesium salt. The curing agent of the invention can treat raw sludge difficult for preliminary mechanical dewatering, simplify the treatment process and difficulty, shorten the construction period, lower the cost of treatment and realize good treatment effect.

The invention relates to basement construction, in particular to a method for disassembling an inner concrete support of a basement foundation pit. The method for disassembling the inner concrete support of the basement foundation pit through sealed explosion comprises that: the basement foundation pit adopts a row-pile and siding wall type inner concrete support foundation pit supporting system. The disassembly method mainly comprises the following steps: support replacement of a structure, namely utilizing backfill of a basement and a force transferring belt to complete support replacement of the structure; disassembly of partial inner concrete support for supporting the foundation pit; construction of a basement structure on the force transferring belt; and disassembly of the inner concrete support through sealed explosion. The method for disassembling the inner concrete support of the basement foundation pit through sealed explosion shortens the construction period and guarantees safety.

The invention discloses a construction method of a lattice light-gauge steel house. The construction method of the lattice light-gauge steel house comprises the following steps of foundation treatment, wall body construction, and storied building panel construction. The construction method of the lattice light-gauge steel house is ingenious in design and simple in process, the light-gauge steel house has better structure strength and earthquake resistant property, and construction material cost is reduced. The storied building panels and the wall body are formed by removal-free templates and plaster at a time, and plaster processing is not needed. Metal meshes and cement mortar are combined closely, the quality common faults of hollow bulge and the like caused by traditional secondary plastering are overcome, and additional heat-preservation and thermal-insulation materials and secondary construction procedures are not needed.

The invention relates to a prestress construction method for a large-scale aqueduct, belonging to the aqueduct construction technical field. The method mainly completes the prestress construction of the aqueduct by the following steps of colligation of a steel disc, assembly of a corrugated pipe, assembly of a stretching end anchor pallet, assembly of a fixed end p-type anchor device, clustering of steel strands, primary concrete placement and secondary concrete placement, and techniques such as stretching, channel grouting and so on. The method adopts the construction techniques such as three-dimensional arrangement of prestressing tendons, pretightening of a single tendon, staged stretching, anchor seal through a protective cover, vacuum auxiliary grouting and so on, shortens the construction period and reduces the production cost.

The invention discloses a sling tensioning and system conversion method for a double-tower three-span plane main cable self-anchorage type suspension bridge. The sling tensioning and system conversion method comprises a first step of synchronously tensioning and anchoring a plurality of slings horizontal at an identical vertical bridge direction position; a second step of enabling sling tensioning within a full bridge to be performed at four operation positions simultaneously at most, enabling two side spans to be two operation positions respectively, and enabling two half spans of a main span to be two operation positions respectively; a third step of symmetrically tensioning slings of two half-bridges with a main span midspan serving as a limit; a fourth step of tensioning and anchoring side span slings from a side span midspan to two sides one by one within the range of each half-bridge, synchronously tensioning every two adjacent slings in remaining slings which are not tensioned or anchored from a main tower to the midspan, tensioning and anchoring slings close to the main tower, enabling another sling to be tensioned to some cable force and be temporarily anchored, and circulating until all slings are tensioned and anchored. According to the sling tensioning and system conversion method, a construction speed is quick, a construction period is greatly shortened, needed jacks and extension bars are fewer, and the cost is greatly reduced.

The invention provides a novel sleeve-type fabricated joint of a square steel tube column and an H-shaped steel girder and a construction method of the novel sleeve-type fabricated joint. The novel sleeve-type fabricated joint comprises a joint area square steel tube column section, a joint area H-shaped steel girder section and a connecting piece. The connecting piece comprises a square sleeve, an H-shaped sleeve and a supporting steel plate, the square sleeve and the square steel tube column are connected through high-strength bolts, the situation that the column wall is too thin, and thus local protrusion occurs to the positions, where the bolts are located, of the square steel tube column is effectively prevented, and thus the bearing force of bolted connecting positions of the columnand the girder is increased; the H-shaped sleeve and the square sleeve are connected in a welded mode, the welding area is increased compared with a conventional mode, and thus the joint is firmer andsafer; the supporting steel plate is connected with the square sleeve, the joint area H-shaped steel girder section and the joint area square steel tube column section simultaneously through high-strength bolts, the bearing force of the girder and column joint is increased, thus stress is more reasonable, and the joint is firmer; and the welding section can be completed in a factory, on-site zero-welding is achieved, and thus the novel sleeve-type fabricated joint is suitable for fabricated connecting of the square steel tube column structure and the H-shaped steel girder structure.

The invention discloses a method for reinforcing concrete structure by using prestressed fiber cloth. The fiber cloth anchorage and tension stressed region adopts a wedge structure which is opposite to the prestressing direction; the tensioning equipment using a simple structure with tension counterforce beams and tension rods has the advantages of simple structure, light weight and simple operation; and the anchorage and tension stressed region in the wedge structure enables the fiber cloth to be stressed uniformly in the process of tensioning and anchorage, and the fiber cloth can not be damaged when large tensioning force is applied, so that the fiber cloth reaches large longitudinal tensioning force without prestressing loss, thereby inhibiting the production and development of longitudinal cracks in concrete posts. The tensioning operation of the invention can do little damage to the original concrete structure, and thus, the invention can greatly save the construction cost, reduce the engineering risk and shorten the construction period, and has obvious technical and economic comprehensive benefits.

The invention discloses a butt joint connecting structure of precast concrete components. The connecting objects are a component I and a component II which are closely connected with each other through a concave pit/a groove and a protrusion which are matched with each other in shape and size and paved with a cushion ply, and meanwhile a rear sealing troughed belt is formed between the two precast concrete components; a connecting mode of 'a longitudinal bar-a sleeve-a connecting rod-a sleeve-a longitudinal bar' is adopted for longitudinal bar connection, connection between the connecting rod and sleeves at the two ends can achieve a prestressed connection effect through a difference between pitches at the two ends. According to the butt joint connecting structure of the precast concrete components, the problems that in existing cast-in-place connection and bed mortar connection, time for forming bearing capacity on the joint is too long, assembly schedule is affected, the difficulty for transporting and protecting longitudinal bars to be connected is great, and minimum clear distance of grout sleeves and thickness of a protection layer is difficult to be guaranteed are solved, and meanwhile the prestressed connection is achieved.

The invention provides a comprehensive inspecting and testing method for a high voltage power transformer and distribution substation; through using the boosting principle of a transformer, a 380V construction power supply is applied to the low-voltage side of secondary winding of the transformer by a designed power transmission control protection device, and thereby stimulated high voltage electricity is obtained at the high voltage side of the transformer. The stimulated high voltage electricity is transmitted from a transformer feeder cabinet to a transformer substation bus system for stimulating power transmission. After the high voltage bus system is simulatively electrified, the stimulated high voltage electricity is further transmitted a voltage transformer PT cabinet to perform stimulated power transmission, for inspecting operational parameters of the PT cabinet and inspecting whether voltage values of an open winding, a triangular winding and high voltage cabinet microcomputer intelligent protectors meet requirements. The simulated voltage is transmitted to the voltage transformer PT across two sections of buses for simulating power transmission, thus being capable of inspecting protection functions of the PT microcomputer intelligent comprehensive protection device, and performing PT automatic switching tests. Through simulating inverse power transmission, changing the gear switch of the transformer, and recording current values in loops of low voltage side and reading of voltmeter of the high voltage side of the transformer, no-load current characteristic curves of the transformer at different gears can be drawn up.

The invention belongs to shield construction fields such as metro shield tunnels and hydraulic engineering shield tunnels, particularly relates to a shield ground compartment opening method, and solves the problems of the existing passive compartment opening methods. The method includes: presetting a compartment opening position; building a peripheral wall; grouting with double slurry for bottom sealing; advancing shield continuously to penetrate the wall formed by mixing piles; drilling a hole on the ground to a cutter head of the shield; placing a seal gate type steel protective cylinder; and opening the seal gate for maintenance or replacement. The method can be performed along with shield construction, shield advancing is unaffected, and construction period is shortened greatly. The method is performed under normal pressure, so that safety of constructers is guaranteed. The method is clear in process, simple, practicable, easy to operate and popularize, outstanding in economical and social benefits in the field of tunnel construction, and worthy of popularization.

The invention provides a construction method for shield tunnel boulder exploration and blasting treatment. The method comprises the following steps: the boulder detailed exploration is performed around a geologic drilling hole for exposing a boulder; after boulder burying information is proved, the geologic drilling hole for the boulder detailed exploration is used as a boulder blasting gun hole and a pressure release hole; stemming is used for filling in the gun hole; liquid-state explosive is precisely put in the gun hole; a blasting protector is distributed on the gun hole; safety alert is arranged around the blasting area; after the blasting is finished, the safety alert is relieved; and the grouting sealing is performed for the gun hole and the pressure release hole. The construction method reduces construction steps, shortens the construction period, largely reduces the boulder treatment cost, and improves the blasting control precision.

The invention discloses an air shaft shield crossing construction method. The construction sequence of firstly performing shield crossing and then performing air tower main body structure construction in the prior art is regulated into the construction sequence of firstly constructing a partial main body structure of an air tower and then performing the shield crossing, so that the air tower construction is not influenced by the shield construction progress; the construction period can be effectively shortened; the smooth proceeding of the later-stage construction is ensured; and the structure is also very firm, reliable and safe.

The invention discloses a sequence construction method for large area reinforced concrete floors. According to construction, areas with length and width which are both less than 50m are numbered one by one along any direction, plate steel bars can be sequentially bound one after another based on a construction arrangement, a concrete casting is performed in a sequence mode, an ordinary construction joint processing method is utilized between a 9m laminate block and a 15m laminate block, each side of each plate construction joint is provided with a 'rapid and easy setback grid' the plate steel bars are constructed according to a normal plate steel bar binding method, a disconnecting process is absent, a concrete pouring utilizes a construction method of 'one inclined plane, a continuous pouring, one-time reaching top', a concrete inclined plane slope is 1:6, before an initial setting of the concrete, the surface of the concrete is subjected to a rolling by an iron roller, and the concrete is flatly rubbed at least three times by a wood float after the concrete is hardened. The method has the advantages that the cracking effect can be effectively controlled, the construction is convenient, the construction period is shortened, the cost is reduced, and the quality is reliable.

The invention relates to a plugging structure for a large-drawdown pipe well and a construction method thereof, and belongs to the field of building construction. The plugging structure for the large-drawdown pipe well comprises a no-sand cement pipe and a steel casing pipe. A steel plate water stop ring is welded to the steel casing pipe. The portion, located on the bottom elevation portion of an under layer, of the steel casing pipe is connected with a slip-preventing water stop ring in a welded mode. A water stop steel plate with a screw thread steel pipe and the steel casing pipe are welded for stopping water. An end cap with screw threads and threads of the water stop steel plate with the screw thread steel pipe are connected and sealed in a threaded mode. A thickened water stop plugging steel plate is welded to the top of the steel casing pipe. Expansive imperious concrete is poured in the portion between the water stop steel plate and the plugging steel plate of the steel casing pipe. Expansive water stop strips winding around the steel casing pipe are arranged on the connecting portion of the no-sand cement pipe and the steel casing pipe. The invention further discloses a construction method of the plugging structure for the large-drawdown pipe well. Operation is easy to carry out, and the construction period is shortened; as measures of adopting a plurality of waterproof structures are taken, the waterproof effect of a concrete bottom plate can be ensured, and more economic benefits and social benefits can be achieved.

A unbalanced foundation pit support design method comprises the steps of determining parameters of a foundation pit design model; determining a displacement mode of a support structure; determining the position of an inner brace (3); determining the parameters of a support structure at one deeper side of a foundation pit according to a traditional single fulcrum pile static balance method; determining the parameters of a support structure at one shallower side of the foundation pit according to a soil pressure computation method opposite to the traditional mode; supporting at a bounding surface between the deep foundation pit and the shallow foundation pit by adopting a traditional cantilever support structure; determining a support structure material and reinforcing bars according to a maximal bending moment and a maximal shear force of each support structure; finally performing whole stability checking calculation, antidumping checking calculation, and anti-heaving stability checking calculation. By adopting the unbalanced foundation pit support design method, the characteristic of unbalanced pressures at two sides of the unbalanced foundation pit is fully used, the pressure resistant property of a soil body is played, materials are saved and construction period is shortened under the premise of ensuring safety, and the method has very high promotion and application values.

The invention provides root-resisting waterproof concrete and a green roof structure. The concrete comprises the following components: 12-26% of cement, 23.0-25.0% of sand, 4.0-5.0% of water, 42.0-48.0% of gravel, 0.034-0.039% of a water reducer, 0.085-0.104% of an active catalyst, 4.0-7.0% of a fiber, 1.0-3.0% of hydrophobic zeolite and 0.34-0.65% of a root-resisting agent. The green roof structure comprises a structural layer, an insulating layer, a protecting layer, a water discharging layer, a filtering layer and a planting layer in sequence from bottom to top, wherein the protecting layer is made of the concrete. The concrete provided by the invention has root-resisting, waterproof and anti-cracking functions, and is long in service life and low in production cost; the green roof structure is simple, convenient to overhaul, smooth in water discharging, and lower in roof bearing pressure.

The invention relates to an ultraviolet curing paint, and concretely relates to an automatically sprayed ultraviolet curing paint and a preparation method thereof. A disadvantage of present ultraviolet curing paints is that: the curing process is completed in several seconds, and the large contraction makes the formation of the thick coating to be impossible, so the usage of the paints in the anticorrosion field is restricted. The ultraviolet curing paint comprises the following substances, by weight, 100 parts of an oligomer, 20-50 parts of a monomer, 10-30 parts of a coupling agent, 2-10 parts of an acid anhydride, 1-2 parts of a mixed assistant, 10-30 parts of nanometer silica, 3-10 parts of a photoinitiator, 80-200 parts of a solvent and 100-200 parts of a propellent. The ultraviolet curing paint of the invention, which allows a technical problem of ultraviolet curing paints for the equipment anticorrosion to be solved, has the advantages of good anticorrosion effect, convenient construction, no need of compressed air, realization of the automatic spray, simple preparation method, safety, no pollution, fast curing speed, high production efficiency, high film quality, and excellent coating performance.

The invention belongs to a rock-fill concrete (RFC) and cemented sand and gravel (CSG) composite material dam in the technical field of gravity dams as well as a design and construction method thereof. A dam body of the composite material dam comprises an RFC part and a CSG part; and the dam body at the upstream side of the composite material dam is the RFC part, and the dam body at the downstream side is the CSG part. The RFC part is poured by adopting an RFC material. The CSG part is poured by adopting a CSG material. The advantages of the two materials of the RFC and the CSG can be simultaneously exerted; because the upstream side of the dam body is poured by adopting the RFC, the procedure of distributing seepage preventing planes on the upstream surface can be omitted, thereby simplifying construction, shortening the construction period, and reducing the engineering amount of the dam body; and the sand and gravel of a riverbed and excavating waste slag can be used for preparing the materials of the RFC and the CSG, therefore, the invention can more fully utilizes excavating materials, reduce the construction cost and greatly reduce negative impact on environment and has favorable social, economic and environmental ecological benefits.

The invention is about the process to hang the large device by the rotary balance method. It to fix the large device frame off-center to make a fulcrum to balance the frame gravitation and the hoister lifting force. The load of the hoister is much less than the gravitation of the frame, so the hoister can lift large device in the present workshop space. So it can decrease the working time and the cost.

The invention discloses a hanging-basket and bent-cap-support matched integral construction method for a side span linear segment of a high-pier continuous rigid frame bridge. Reinforcing steel bars are bound at a time; pouring is carried out twice; in other words, a section is formed in a pouring mode through a hanging basket in the first time of pouring, and a left solid section is formed in a pouring mode in the second time of pouring. Most of the solid section formed in the second time of pouring is located on a bent cap, and a fraction of the solid section is located on the hanging basket. The hanging-basket and bent-cap-support matched integral construction method has the advantages that the construction procedure can be simplified, the construction period can be saved, and the construction cost can be saved.

The invention discloses a caisson dock structure and the construction method, which is characterized in that, on a foundation bed on which the dock is planned to be built, a prefabricate reinforced concrete caisson and a prefabricate U-shaped steel pontoon are positioned to be the dock wall and the dock entrance respectively, an then a peripherally enclosed dock wall and the dock entrance are assembled; water-seal treatment is applied to the caisson, and a water-seal curtain is constructed at the bottom of the caisson; the construction methods include caisson prefabrication, foundation digging, rock disposition, position and assembly, water-seal treatment and other procedures. The caisson dock structure has the advantages that no construction cofferdam is needed; construction is carried out in water by using the dock wall caisson and the dock entrance pontoon to form the dock structure; therefore, project cost is reduced, the time limit for the project is shortened, and land acquisition problem of the cofferdam and the influence to the periphery environment is solved.

The present invention relates to a cast-in-place hard foam polyurethane composite polystyrene plate exterior heat-insulating system and its construction process. It is mainly characterized by that said construction process includes the following steps: fixing the factory-made polystyrene foam heat-insulating plate on the base layer wall body in the place by adopting three-dimensional anchoring method, and performing a cavity meeting requirement for building energy-saving rate, pouring hard foam polyurethane material in said cavity in the place so as to form adhesive heat-insulating layer of polystyrene plate; then applying face glue on the polystyrene plate heat-insulating layer and adding alkali-resisting grid fabric and applying polymer emulsion elastic water-proofing coating material, and adding polyester non-woven fabric so as to form elastic water-proofing layer and use it as finishing coating material.

The invention discloses an integrated excavation construction method for transition from a shaft construction passage to a large cross-section tunnel. The method is characterized in that mileages of ashaft, a cross passage and an internal cross passage of a double-sidewall cross passage need to be larger than 3 times of a cross passage hole width, so that mutual interference between shaft and cross passage construction and internal cross passage construction can be avoided; transition construction for the cross passage and a subway station tunnel is carried out at a same elevation, so that abias pressure on a joint section caused by variable cross-section construction for the large cross-section tunnel and a small cross-section tunnel can be avoided; and the internal cross passage is established and a frame girder is erected during excavation of the large cross-section tunnel through the double-sidewall drift method, so that the transition construction is achieved. The method provided by the invention has the advantages that the benching tunneling method for the construction passage and the 9-step double-sidewall drift method for the subway station tunnel are integrated, so thata transition section process of the two construction methods is simplified, and the construction is facilitated.

The Swivel Flosser comprises of these parts: a handle portion which is used to hold the flosser, a head portion which grasps the dental floss and has a u shaped configuration. The dental floss is part of the head portion. The head and the handle can be assembled by the user, once assembled together the head can rotate with respect to the handle allowing the user to clean the front teeth, the molars and everything in between with ease. The handle as well as the head can both be disposable or reusable according to utility and personal preference.