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

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 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 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 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 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 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 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.

A rubber asphalt modifier improving asphalt performance is disclosed, and is prepared from, by mass, 20-30 parts of soft-matrix asphalt, 57-68 parts of modified rubber powder and 15-25 parts of modified conglomerate powder, with the modified rubber powder and the modified conglomerate powder being prepared by double-cathode plasma sputtering processes. A preparing method of modified asphalt is also disclosed. The method includes mixing matrix asphalt and the rubber asphalt modifier and then developing the mixture to obtain the modified asphalt. Through modifying rubber powder and conglomeratepowder, dispersibility and compatibility of the rubber asphalt modifier in asphalt are improved, thus improving viscosity and the softening point of the asphalt, and allowing the asphalt to have better high- and low-temperature performance, elasticity restorability and stability. The preparing method is simple, and the prepared modified asphalt has high strength, good toughness, good water resistance, excellent temperature resistance, good fatigue resistance, and the like and has a wide promotion and application prospect.

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.