37results about How to "Avoid construction difficulties" patented technology

The invention discloses a rapid low-risk station tunnel digging method. Positions of a main construction channel and an auxiliary construction channel are determined according to a station, and station digging and supporting are conducted through four steps, namely conversion between the main construction channel and a station connection segment, digging and supporting of pilot tunnels in the station, conversion between the auxiliary construction channel and the station connection segment and digging and supporting of the station. According to the rapid low-risk station tunnel digging method, the position relation between the main construction channel and the station is adjusted, the station construction steps are adjusted, and the conversion method between the auxiliary construction channel and the station connection segment is changed, so that construction difficulty and risk of station tunnel digging are effectively lowered, the number of temporary supports is reduced, the engineering cost is lowered, and the construction period is shortened.

The invention discloses a TD-SCDMA mobile communication method and a TD-SCDMA wireless indoor base station. The TD-SCDMA mobile communication method is as follows: a TD-SCDMA wireless indoor base station is arranged indoors; the TD-SCDMA wireless indoor base station is accessed to a mobile wireless network controller or a core network through wired network transmission medium. By realizing indoorcoverage for TD-SCDMA wireless signals through the TD-SCDMA wireless indoor base station, communication with a TD-SCDMA mobile terminal is realized. The method integrates the wired communication technology and the wireless communication technology and adopts the TD-SCDMA wireless indoor base station to provide a good signal coverage and sufficient frequency resource for a subscriber, and to support the high speed and broadband wireless access of the subscriber; the method also supports the transmission of the high speed or broadband data through the wired communication technology.

The invention relates to an active fault spanning aseismic structure and a construction method thereof. A damping ring is arranged in the surrounding rock of the lining structure at a fault fracture zone, the lining structure is located in the inner round of the damping ring, and a certain spacing distance exists between the lining structure and the damping ring; left, right and upper sides of thetunnel cross section at the fault fracture zone are expanded relative to the tunnel cross section of the stable section; the lining structure penetrating through the fault fracture zone is of a vertical segmental structure, and two adjacent lining segments are connected through a folded flexible joint in the deformation joint. The damping ring is adopted to weaken the earthquake action, and partsof seismic wave energy is absorbed to consume and reduce the earthquake energy; the whole lining structure is converted to the lining segment from, flexible chaining connection capable of bearing large deformability between the two adjacent lining segments is adopted, so that the staggered displacement is mainly absorbed by the flexible chaining connection, and the earthquake resistance and damping performance of the tunnel structure is improved. According to the structure, earthquake resistance and diastrophism resistance are combined, and the whole safety of a tunnel can be greatly improved.

The invention discloses a method for excavating and supporting a subway station tunnel by adopting an underground excavation construction channel, relates to the technical field of tunnel construction, and mainly aims to solve the problems of complicated conversion procedures, high risk, high temporary support consumption and the like in a station tunnel construction method. The method comprises the steps of conversion construction of a main construction channel and a station tunnel, conversion construction of an auxiliary construction channel and the station tunnel and excavation support of the station tunnel; the top of the main construction channel is lifted to be flush with an arch crown of the station, and parallel station entering and portal steel arch frame support are adopted; andthe auxiliary construction channel adopts footage from the station tunnel, relates to the station excavation construction step sequence in the range of the conversion section and support at the connection position of the station tunnel and the auxiliary construction channel. The method aims to solve the problems of complicated construction steps, large construction risk of key sections and more temporary supports in the traditional construction method so as to expect the underground station tunnel construction to achieve safer and more efficient purposes.

The invention discloses an aluminum dihydrogen phosphate and steel fiber reinforced refractory castable and a preparation method. The aluminum dihydrogen phosphate and steel fiber reinforced refractory castable comprises a main refractory material, an additive and a binding agent; the raw material of the binding agent comprises an aluminum dihydrogen phosphate aqueous solution in mass concentration of 45-50%; thiourea and potassium iodide are dissolved in the aluminum dihydrogen phosphate aqueous solution in mass concentration of 45-50%; the weight of the aluminum dihydrogen phosphate aqueoussolution in mass concentration of 45-50% is 8-12% of total weight of the main refractory material. The aluminum dihydrogen phosphate and steel fiber reinforced refractory castable is adopted for preparing the products, such as a molten iron slagging plate with a carbon steel metal core wrapped with a refractory material; the generation of reaction gas of aluminum dihydrogen phosphate is avoided during the processes of castable preparation and casting molding; water resistance and strength under normal temperature of the casting body are promoted; excellent effects of greatly reducing the timeof casting molding and baking preparation, reducing baking energy consumption and prolonging service life are achieved.

The invention discloses a method for repairing a local crack of a concrete beam by using a shallow embedded shape memory alloy wire. The method for repairing the local crack of the concrete beam by using the shallow embedded shape memory alloy wire comprises the steps of 1) forming a groove in the concrete beam with the local crack within a protective layer depth range; 2) embedding a shape memory alloy after being stretched to generate pre-strain into the groove; 3) injecting a bonding material into the groove; 4) electrifying and heating the shape memory alloy; and after cooling, using permanent return stress to apply prestress to the concrete beam; and 5) recovering a concrete protective layer to finish reinforcing. According to the method for repairing the local crack of the concrete beam by using the shallow embedded shape memory alloy wire, in the case of not changing the appearance of an original structure, the shape memory alloy is driven to generate the permanent return force as the pre-stress to act upon the local crack of the concrete beam through thermal excitation on the shape memory alloy so that the stress state of the local crack of the concrete beam is improved and the local crack is reduced or closed; and therefore, the bearing capacity and durability of the structure are improved; and meanwhile, limitations such as low pre-stress, difficult anchorage device mounting and poor aesthetic property of a traditional active reinforcing method are avoided.

The invention discloses a bottom steel bar connecting structure of a key groove node precast frame beam. The bottom steel bar connecting structure comprises precast beams and precast columns. The precast beams are erected on the precast columns, key grooves are formed in the precast beams in the node region, cast-in-place layers are cast in the key grooves, cast-in-place layer steel bars are arranged in the cast-in-place layers, the cast-in-place steel bars are anchored into the precast columns, the precast beams and the precast columns are connected into a whole through the cast-in-place layers, and bottom longitudinal bars of the precast beams are anchored into the precast columns in the node region. Compared with the prior art, the bottom steel bar connecting structure of the key groove node precast frame beam has the advantages that the problem that connection of bottom longitudinal bars of precast beams in the node region of a scope system does not meet the standard requirement is solved and the problems that manufacturing of components of a Ruentex system are complicated and construction of the node region is difficult are also avoided.

The invention relates to the technical field of pit-in-pit supporting structures in deep foundation pits and discloses a pit-in-pit horizontal supporting structure in the deep foundation pit and a construction method of the pit-in-pit horizontal supporting structure. The horizontal supporting structure comprises multiple support piles, waist beams, multiple supporting beams and multiple engineering piles. The support piles are arranged at intervals along one side of a pit in the pit, the waist beams are connected to the support piles respectively, the supporting beams are placed on the two sides of the pit in the pit, and the engineering piles are placed on the two sides in the pit in the pit respectively. One end of each supporting beam is connected to the corresponding waist beam, and the other end of each supporting beam is connected with the engineering pile on the same side. According to the horizontal supporting structure, the engineering piles are used as horizontal force bearing components, the support piles and the engineering piles are connected into a whole through the waist beams and the supporting beams, and soil pressure borne by the support piles can be transmitted to the engineering piles. Therefore, anchor rods do not need to be arranged, cost is saved, the construction period is shortened, and the potential safety hazards caused by difficulty of control over construction quality of the anchor rods can be avoided.

The invention relates to a fastening clamp for a web side formwork of a stiffened concrete beam. The fastening clamp comprises a plurality of clamp units, wherein each clamp unit consists of a left / right side rod, split bolts, nuts and stop collar rods, grooves are formed in the rod ends of one sides of the left / right side rods, a plurality of holes for threading the split bolts are formed from the middle sections of the left / right side rods to the rod sections on the other sides at an equal interval, the groove rod sections of the left / right side rods are attached to the web side formwork of the stiffened concrete beam, the split bolts are threaded through the middle sections and the tail sections of the left / right side rods, the stop collar rods are arranged on the split bolts at the tail sections in a sleeving way, the nuts of the split bolts in the middle sections of the left / right side rods are tightened, and the web side formwork of the stiffened concrete beam is tightly clamped by the left / right side rods. The fastening clamp has the advantages that the traditional fastening mode of forming the holes in the web of the steel beam and threading the split bolts is replaced by the product, the problems that the inaccurate alignment of formwork holes on the two sides of the beam causes difficult construction and repeated formwork hole forming are effectively solved, and the concrete molding quality is ensured.

The invention relates to a nonlinear multi-agent consistency method based on state observation and an experience pool, and belongs to the field of computers. Firstly, under the scene that a follower cannot acquire the state of a leader, a backstepping method and a dynamic surface control method are used for designing a full-dimensional observer for each agent to observe the state of the leader. Afterwards, the consistency problem is converted into the optimal tracking problem of each follower to the respective leader state observer. In the next step, a non-quadratic cost function is defined for processing aiming at asymmetric saturation constraint on control input, then an optimal control problem under a new augmented system is defined, a reinforcement learning strategy algorithm is used for iterative solution, and the stability and optimality of a solution under strategy iteration are analyzed. For the difficulty that the optimal control HJB equation is difficult to directly solve, the method utilizes the good approximation property of the neural network, and an act-critic framework is used for solving.

The invention relates to a combined concrete rectangular sunk well basin and a construction method thereof. The combined concrete rectangular sunk well basin is formed by enclosing the river channel offshore soil body by an enclosing structure and digging to remove the internal soil body, wherein the enclosing structure is a U-shaped structure defined by a group of rectangular sunk wells which sink section by section respectively; the opening of the U-shaped structure faces the river channel, and the top surface is cast in place with continuous reinforced concrete top plates; two opposite walls of the U-shaped structure are spaced by a pre-cast concrete connecting beam; the bottom surface of the pre-cast concrete connecting beam clings to the bottom surface of the basin; the cavity of the rectangular sunk well is sequentially provided with a rubble layer, a bottom sealing concrete soil layer and a backfill sand layer from bottom to top. The combined concrete rectangular sunk well basin has the advantages of strong structural integrity and good stability, is simple to construct and convenient to operate and implement, does not need investment in special mechanical equipment and dedicated materials, imposes relatively little influence on neighbor buildings and structures during construction, and the like, and can be widely applied to the basin construction of river channels or seas.

The invention relates to a connecting node of a square steel pipe column, an H-shaped steel beam and an L-shaped ribbed plate. The node is simple in structure, convenient to construct and is free of affecting to pour concrete in the square steel pipe column. The connecting node comprises the square steel pipe column, the H-shaped steel beam and the L-shaped ribbed plate, wherein two limbs of the L-shaped ribbed plate are respectively in butted joint with the upper flange and the lower flange of the H-shaped steel beam and connected with a wall plate of the square steel pipe column. The width B of the flange of the H-shaped steel beam 1 is twice the sum of the lengths b1 of the limbs of the L-shaped ribbed plate in butted joint with the H-shaped steel beam 1. The square steel pipe column comprises a cold bending rectangular square steel pipe column and a hot rolled square column; and the H-shaped steel beam comprises an H-shaped hot rolled steel beam and an H-shaped welded steel beam. The connecting node of the square steel pipe column, the H-shaped steel beam and the L-shaped ribbed plate in the invention adopts a measure of additionally arranging stiffening ribs outside to replace inner partition plates, and the L-shaped ribbed plate can transfer tension and pressure of the flanges of the beam to the wall of the square steel pipe column, so that the deformation outside a plane of the node is increased. Meanwhile, the problem of construction difficulty in installing the inner partition plates can also be avoided.

The invention discloses a composite for a radome and a method of utilizing the composite to prepare the radome. The composite is prepared by mixing glass fibers and resin, wherein the weight ratio of the glass fibers to the resin is (2.5-3.5) to (1.5-2.5), and in a preferred embodiment, the weight ratio of the glass fibers to the resin is 3 to 2. The weight ratio in the preferred embodiment can enable a wall thickness tolerance of the radome to reach within 0.1mm, and the preferred component ratio can enable the prepared composite to have the effects of very low dielectric constant and high wave transmission rate, so that the requirements of material selection of the radome is met to be beneficial to transmitting a radar signal, and at the same time, the problem of difficulty in construction caused by increased ratio of the glass fibers is solved.

The invention provides a construction method of a building outer wall heat preservation and decoration integrated plate. The construction method comprises the steps that S110, cement mortar is adoptedfor leveling on a base layer wall surface; S120, a vertical control line and a horizontal control line are popped up on the foundation wall surface; S130, a grid division scheme of the whole outer wall heat preservation and decoration integrated plate and the blanking size of each grid of plate are determined, each grid of plate is cut, and inserting grooves are formed in four side surfaces of each grid of plate; S140, a control line of each grid of plate is popped up, a grid dividing gap is formed in the control line of each grid of plate, and the widths of the grid dividing gaps are equal;S150, the plates are bonded row by row one by one according to the control line of each grid of plates along the horizontal control line and the vertical control line, in the process of bonding the plates one by one, fixing frames are installed in the dividing gaps, are fixed to the foundation wall surface and are inserted into the inserting grooves of the adjacent plates; and S160, caulking strips are embedded into the dividing gaps, and sealant is smeared on the caulking strips. By means of the method, the defects that plate installation is not firm, construction is difficult, and anchoringparts are exposed can be overcome.

The invention discloses a construction method of a connection plate mounting connector of a single-layer partition board. The construction method comprises the steps that A, a partition wall board A is hoisted in place, the upper end of the partition wall board A is fixed temporarily through construction measures, and the lower end of the partition wall board A is arranged on a mounting joint; B,a connector is mounted at the upper end of the partition wall board A, a web of the connector is arranged on the top end face of the partition wall board A, then the position of the partition wall board A is adjusted, the mounting joint at the lower end of the partition wall board A is fixed after the position of the partition wall board A is fixed, a lower flange plate of the connector is furtherrotated to be attached to the partition wall board, then a fastening screw A is adopted to penetrate through a fastening hole A to fix the lower flange plate, and the mounting of the partition wall board A is completed; C, a partition wall board B is hoisted in place, after the position is adjusted to be precise, an upper flange plate is rotated to be attached to the wall partition board B closely, then a fastening screw B is adopted to penetrate through a fastening hole B to fix the upper flange plate, then the upper end of the partition wall board B is fixed and provided with a connector, and the mounting of the partition wall board B is completed; and D, the temporary fixing measures at the upper end of the partition wall board A are dismounted, and mounting is completed.

The invention discloses an environmental temperature and humidity collecting system based on PLC power line carriers. The environmental temperature and humidity collecting system comprises a slave station collection module, a master station communication module and a cloud service platform. The slave station collection module and the master station communication module are in PLC communication, and communication is carried out through a circuit formed by a live wire and a null wire. A wireless communication module is arranged in the master station communication module, and the master station communication module is in communication with the cloud service platform through the wireless communication module. The advantage of collecting household temperature within a large range by a heat supply company is achieved.

The invention discloses a mounting connecting piece for a connecting plate of a single-layer partition board. The mounting connector comprises a partition board A, a partition board B and a connectingpiece, wherein the connecting piece comprises a web plate, lower flange plates and upper flange plates, the lower flange plates and the upper flange plates are correspondingly hinged to the two endsof the web plate, the lower flange plates and the upper flange plates arranged at the same end of the web plate are hinged to same hinges, the lower flange plates and the upper flange plates at the same end can be folded on a plane around the hinges, and the web plate, the lower flange plates and the upper flange plates on the connecting piece can be folded into an H-shaped steel piece through thehinges. The web plate and the two upper flange plates on one side of the web plate are clamped and fixed on the partition plate A through folding. The web plate and the two lower flange plates on theother side of the web plate are clamped and fixed on the partition board B through folding, and the partition board A and the partition board B are connected into a whole through the connecting piece.

The invention provides a river channel monitoring device and method and a computer readable storage medium, belongs to the technical field of river channel management, and solves the technical problem of high cost of an existing river channel monitoring mode. A riverway monitoring device is used for monitoring a plurality of preset detection points provided with water gauges on a riverway and comprises a camera, a holder, an inclinometer and a CPU. The holder and the inclinometer are fixed to the camera, the holder is used for controlling the shooting position of the camera, and the inclinometer is used for detecting the inclination angle of the camera along the Y axis; the video output end of the camera is electrically connected with the input end of the CPU; the information output end of the holder and the information output end of the inclinometer are electrically connected with the input end of the CPU, and the output end of the CPU is electrically connected with the control end of the holder and the control end of the inclinometer; and the CPU controls the inclination angle of the inclinometer and the rotation of the holder, so that the camera performs video data acquisition on a plurality of preset detection points, and the CPU identifies the video data to obtain the water level, flow velocity or flow data of the river channel.

The invention discloses a household intelligent electricity use micro-network system based on the power line carrier technology. The household intelligent electricity use micro-network system comprises an intelligent electricity use management unit, multiple power line carrier interconnected WiFi modules and multiple power line carrier interconnected intelligent sockets, wherein the intelligent electricity use management unit comprises a household power supply main switch and an energy gateway which are sequentially connected, the power line carrier interconnected WiFi modules are connected with the energy gateway through power line carriers, the power line carrier interconnected intelligent sockets are connected with the energy gateway through power line carriers, and the household power supply main switch comprises a faulty arc detection module and a circuit temperature collection module which are connected with the energy gateway. By means of the household intelligent electricity use micro-network system, rewiring is not needed, complete household local network coverage is achieved, and the requirements for intelligent electricity use, safe intelligent electricity use and healthy Internet surfing are met.

The invention discloses a transient grouting material. The transient grouting material consists of the following components in parts by mass: 800-1100 parts of a cementing material, 0.3-3 parts of a functional additive, 0.5-2 parts of a setting time adjusting additive, 0.1-1.5 parts of a thickening agent, and 0.5-1 part of a reinforcing agent. The transient grouting material provided by the invention uses sulphoaluminate cement as a cementing material, the sulphoaluminate cement is a fast hardening cement, and under this basic system, boric acid is a retarding material of the sulphoaluminate cement and lithium carbonate is an accelerating material, so that by reasonably selecting the composition of modified materials, the transient grouting material provided by the invention has certain scour resistance, reasonable setting time and setting time interval, and the setting time can be reasonably controlled according to actual application scene conditions to avoid construction difficultiescaused by a too short setting time when the transient grouting material is applied to underground grouting or other dynamic water grouting conditions.

The invention discloses a prefabricated reinforced concrete gate slot unit for a rcc dam and a construction method of a gate slot. The construction method comprises the following steps of prefabricating the prefabricated reinforced concrete gate slot unit with a slot and a plug in a factory for prefabrication and pre-burying a joint bar; chiseling a contact surface of the prefabricated reinforcedconcrete gate slot unit and the ground concrete; chiseling a contact surface of the prefabricated reinforced concrete gate slot unit and the second phase concrete; chiseling a contact surface of newand old concrete; hoisting the prefabricated reinforced concrete gate slot unit on-site; carrying out layer-by-layer construction to grind concrete; hoisting the upper-layer prefabricated reinforced concrete gate slot unit, and carrying out layer-by-layer construction to grind concrete to a design elevation; and pouring the second phase concrete in a later period and mounting a metal structural part. The construction method avoids defects that it is hard to pour concrete on-site and it is slow to pour the concrete. A socket and spigot joint prefabricated part is quick to construct and construction of the socket and spigot joint prefabricated part and construction of grinding the concrete can be carried out synchronously, so that the construction period of the rcc dam is guaranteed.

The invention relates to a device for an installation structure fireproof test under engine suspension static loading, which belongs to the technical field of aero-engine detection and comprises a main frame mechanism, a rotatable upper cantilever mechanism, a load loading mechanism, a tension detection mechanism, an engine mass center adjusting mechanism and a rotatable lower bracket mechanism. The rotatable upper cantilever mechanism is fixedly installed on the upper portion of the main frame mechanism and rotationally connected with the load loading mechanism, the lower end of the load loading mechanism is connected with the tension detection mechanism, the lower end of the tension detection mechanism is fixedly connected with the engine mass center adjusting mechanism, and the engine mass center adjusting mechanism is fixedly arranged on the aero-engine. The rotatable lower bracket mechanism is arranged on the lower portion of the main frame mechanism and fixedly connected with the lower end of the aero-engine, and the aero-engine fire protection device can be matched with various existing fire protection devices and can be suitable for different force application angles of different engines.

The invention discloses a cordwood temporary support base structure. The structure comprises a beam body, a bridge pier and a support base unit, a rectangular support base unit is assembled from two A standard blocks and a B standard block, and the inclined planes of two sides of the cross section of B standard block are attached to the inclined plane of the upper A standard block and the inclined plane of the lower A standard block respectively; beam body connecting bolts are arranged in a vertical unthreaded hole of the A standard block which is located above the B standard block in a penetrating mode, and fixing nuts which are connected to the beam body connecting bolts in a threaded mode are arranged in bolt grooves; the beam body connecting bolts are upwards and fixedly connected with the beam body, and bridge pier connecting bolts are downwards and fixedly connected with the bridge pier; the beam body and the bridge pier are fixedly and integrally connected through a plurality of support base units. The invention further discloses a construction method of the cordwood temporary support base structure. The disassembling efficiency of the temporary support base is greatly improved compared with the prior art, and the construction period is shortened; no waste generates after the temporary support base is disassembled, the environment is not polluted, and the use cost is saved.

The invention relates to a multi-layer circuit and multi-burner port flameless ceramic burner. 1-3 sets of burners are combined and installed at the upper part of a top combustion stove when the multi-layer circuit and multi-burner port flameless ceramic burner is used; an upper gas circuit, a middle air circuit and a lower gas circuit, which are sequentially communicated with an upper gas inlet, a middle air inlet and a lower gas inlet are distributed inside the stove wall from top to bottom; an upper burner port layer and a lower burner port layer are arranged on the inner wall of the stove wall; burner port rings are evenly distributed; gas nozzles are respectively formed in the lower part of the upper gas circuit and the upper part of the lower gas circuit; air nozzles are respectively formed at the top side and the bottom side of the middle air circuit; the air and the gas respectively enter upper and lower mixed channels inside respective circuits through corresponding nozzles, and then eject through the burner ports to burn. Control of the burner is as follows: combustion heat load distribution from an upper burner port layer to a lower burner port layer is sequentially reduced, and the excessive coefficients of combustion air are sequentially increased. The air and gas inlets of the burner and the circuits are interconvertible in position, and the multi-layer circuit and multi-burner port flameless ceramic burner is applicable to various top combustion stoves.

The invention discloses a TD-SCDMA mobile communication method and a TD-SCDMA wireless indoor base station. The TD-SCDMA mobile communication method is as follows: a TD-SCDMA wireless indoor base station is arranged indoors; the TD-SCDMA wireless indoor base station is accessed to a mobile wireless network controller or a core network through wired network transmission medium. By realizing indoorcoverage for TD-SCDMA wireless signals through the TD-SCDMA wireless indoor base station, communication with a TD-SCDMA mobile terminal is realized. The method integrates the wired communication technology and the wireless communication technology and adopts the TD-SCDMA wireless indoor base station to provide a good signal coverage and sufficient frequency resource for a subscriber, and to support the high speed and broadband wireless access of the subscriber; the method also supports the transmission of the high speed or broadband data through the wired communication technology.