6633results about How to "Reduce construction difficulty" patented technology

The invention relates to an intelligent traffic control system and method based on a wireless Mesh ad hoc network. The control system comprises n traffic control nodes, m ZigBee area base stations, a mobile communication base station and a traffic control center, wherein the n traffic control nodes are positioned in all intersections, and all kinds of equipment in the n traffic control nodes are connected by an RS-232/RS-485 bus; adjacent nodes realize a wireless Mesh ad hoc communication network by a ZigBee technology and exchange traffic data in real time; remote connection is carried out between each ZigBee area base station and the traffic control center by adopting GPRS/CDMA (General Packet Radio Service/Code Division Multiple Access) data transmission equipment through the mobile communication base station; and m and n are respectively integers of 1-100 and 2-256. The system organically combines an advanced ZigBee short-distance wireless communication technology and a modern intelligent network technology; and the control method of the invention adopts a self-coordinating intelligent distribution type control algorithm and can realize the optimal traffic signal control effect.

The invention discloses a wellhead wall-hook packer. The packer comprises a bottom plate, a rubber core, a slip and an upper cover plate, wherein the bottom plate, the rubber core, the slip and the upper cover plate are connected in sequence through bolts. During specific use, the wellhead wall-hook packer is arranged on the outer side of an inner casing in a sleeving manner, the bolts are screwed, the slip and the rubber core are squeezed by the upper cover plate and the bottom plate at the same time, the rubber core is expanded to pack a casing annulus, the slip moves down and is jogged in the surface of the inner casing to prevent the wellhead wall-hook packer from moving upwards under the action of annulus pressure. According to the scheme, annulus packing is realized through the wellhead wall-hook packer, so that the problems of blow-by and annulus belt pressure caused by poor cementing quality of the annulus are effectively solved; compared with the mode for injecting cement slurry into the annulus through a drilling machine in the prior art, the packer has the advantages that the construction difficulty is reduced to guarantee that the entire repair operation is simple and reliable.

A passage formation method for underground coal gasification is provided. The method comprises the following steps of: (a) building a fire area in the bottom coal bed of a first bore hole; (b) performing mechanical and directional drilling operation in a neighbor coal bed close to the bottom of the first bore hole in the vicinity of the fire area through the lower end of a second bore hole which is another existing bore hole or a newly-drilled bore hole outside the fire area, so as to pre-penetrate the neighbor coal bed and thus to form a directional passage communicated with the fire area in the neighbor coal bed; and (c) delivering an oxygen-containing gas to the fire area through the second bore hole and the directional passage, and thermally processing the directional passage to enlarge the directional passage and thus to form a gasification passage used for a underground coal gasification furnace.

The invention discloses a shield tunneling machine split starting construction method and belongs to the technical field of building construction. The method comprises the following steps: (1) cleaning an underground site, (2) starting base seat underground assembling and laying rails, (3) moving a first trolley and a second trolley underground and moving the first trolley and the second trolley backward, (4) moving a duct piece cart underground, (5) moving a connecting bridge and a spiral conveyor underground in a hoisting mode, and moving the connecting bridge and the spiral conveyor backward, (6) moving a starting table underground, smear ing lubricating grease, moving a cutter disk and a shield body underground and locating and assembling the cutter disk and the shield body, (7) assembling, (8) starting trying tunneling, (9) restoring to normal shield tunneling. The method has the advantages of effectively solving the problem that a shield tunneling machine cannot be operated and run normally for being restricted by the actual environment of a shield tunneling staring operation shaft on a construction site, greatly improving construction efficiency, saving construction cost, and reducing construction difficulty.

The invention provides a CTCS (China Train Control System)-3-level train control center system, comprising a TCC(Train Control Center). The TCC is used for carrier frequency and low frequency coded commands to a rail circuit device, and receiving rail section state information and device state information returned by the rail circuit device; the TCC is further used for transmitting coded information to the rail circuit device according to route information provided by a CBI (Channel Bus In), the rail section state information and the device state information, and the rail circuit device transmits movement authority information to the train according to the coded information; and the rail circuit device transmits a temporary speed restriction command to the train through an active transponder according to the temporary speed restriction command t transmitted by a TSRS (Temporary Speed Restriction Server). The rail circuit device is used for transmitting the movement authority information to the train according to the coded information. With the CTCS-3-level train control center system, the safety and the reliability of a high-speed railway train operation control system are both improved, and equipment cost and construction difficulty are both reduced.

The invention discloses a single-wall and double-wall combined steel cofferdam construction method and a single-wall and double-wall combined steel cofferdam. The single-wall and double-wall combined steel cofferdam construction method includes the following steps: firstly, assembling the bottom segment side plate of the cofferdam at an assembly field; then floating to the position of a pier; after that, injecting concrete into the foot blade and assembling the top segment of cofferdam and the top segment inclined strut; then positioning, cleaning up the pedestal, building a boring platform, installing a steel casing and stacking the sandbags sequentially; after that, injecting bottom seal concrete, and boring the pier for injection; finally, after the pier pedestal is constructed, pumping the water, cutting off the steel casing, chiseling off the laitance at the head of the pier and beginning the construction of a bearing board. The bottom segment side plate of the cofferdam is composed of circular external and internal wall panels, and the top segment side plate of the cofferdam is fixed on the circular external wall panel. The invention has the advantages of fast engineering speed, small construction difficulty and small cost investment, and the top segment side plate can be used repeatedly and is high in recovery rate; the invention overcomes the difficulties at the time of no bottoming concrete thickness; the circular sealing concrete between the bearing board and the cofferdam also has the effect of resisting water.

The method thereof comprises: after the sending end converts the CPRI data into the frames adaptive to Ethernet transmission, it transmits the converted frames on the Ethernet; the receiving end receives the converted frames through Ethernet, and restores the converted frames into CPRI frames to get CPRI data. Before transmitting the CPRI data of one data packet, the frame head is firstly transmitted through IQ bandwidth; in the gaps of transmitting different data packets, the inter-frame gap is transmitted by using IQ bandwidth.

The invention relates to a corrugated steel webplate combined box girder floor system for a cable-stayed bridge and a construction method thereof, and belongs to the technical field of bridge structures. The corrugated steel webplate combined box girder floor system comprises a precast concrete plank and a cast-in-place concrete seam, wherein the precast concrete plank is positioned on a steel box girder and is integrated with the steel box girder into a whole; the steel box girder is formed by welding a top flange steel plate, a corrugated steel webplate and a steel plate at the bottom of the box girder; a box girder baseplate stiffening rib and a diaphragm plate are welded in the steel box girder; the diaphragm plate comprises a top flange steel plate of the diaphragm plate and a steel webplate of the diaphragm plate; a toggle pin connecting piece is welded on the top flange steel plate and the top flange steel plate of the diaphragm plate; and a steel anchor pulling plate and a steel sleeve are welded on the top flange steel plate. The corrugated steel webplate combined box girder floor system simplifies the manufacturing process for the precast concrete plank, gives full play to the superior mechanical property of the corrugated steel webplate and the release action of the corrugated steel webplate on the creep effect of concrete shrinkage, improves the bearing capacity, stiffness and crack resistance of the structure, and improves the durability of the structure.

The present invention discloses a self-compacting concrete for CRTS III plate-type ballastless track filling layer. The concrete is prepared from the following raw materials in parts by weight: 270-350 parts of cement, 0-130 parts of coal fly ash, 0-120 parts of mineral powder, 20-50 parts of an expanding agent, 790-900 parts of fine aggregate, 750-900 parts of continuous gradation coarse aggregate, 20-40 parts specific viscosity modified materials, 5.5-8.5 parts of a specific sustained release controllable polycarboxylic acid water reducing agent and 165-180 parts of water. According to the invention, the specific viscosity modified materials and specific sustained release controllable polycarboxylic acid water reducing agent are used in combination to prepare the specific self-compacting concrete for filling layer with good flowability, strong volume stability, low sensitivity for water consumption, small thixotropic time change, low shrinkage and good longevity, thereby reducing theconstruction difficulty of the CRTS III plate-type filling layer and prolonging the sevice life of the ballastless track structure.

The invention discloses a composite casing box cofferdam and a construction method thereof. A double-wall steel cofferdam which consists of an inner wall and an outer wall which are connected is arranged on bedrock, positioned and fixed; mad and sand between the inner wall and the outer wall of the cofferdam are cleared; a bed rock hole is drilled on the bedrock between the inner wall and the outer wall of the cofferdam; steel reinforcement cages are arranged in the bedrock hole and between the inner wall and the outer wall of the cofferdam; bottom sealing concrete is poured into the bedrock hole and between the inner wall and the outer wall of the cofferdam, to construct the composite casing box cofferdam. The invention has the advantages of convenient construction, material saving, stable structure and high positioning precision.

The invention provides an intelligent parking system with a reverse vehicle lookup function. The system comprises a parking place status indicator lamp (1), a parking place detection card (2), a vehicle identification card (3), a wireless communication base station (4), a master control computer (5), a camera (6), a vehicle inquiry machine (7) and a parking place guide screen (8). According to the system, vehicle guidance and the reverse lookup function are integrated, the wireless parking place detection card, the wireless vehicle identification card, the vehicle guide screen and the vehicle inquiry machine are used, and the intelligence degree and the efficiency of parking management are greatly improved.

The invention discloses a high-performance epoxy resin asphalt warm mixing agent comprising a component A and a component B, wherein the component A is composed of epoxy resin, a reinforcing agent and a coupling agent; the component B mainly comprises a flexible curing agent, an accelerant, a reinforcing agent, a toughening agent and a defoaming agent; and the mass proportion of the component A to the component B is equal to (100:250)-(100:300). High-performance warm mixing epoxy resin asphalt prepared by using the high-performance epoxy resin asphalt warm mixing agent provided by the invention has the characteristics of lower mixing temperature, high strength, better high-temperature ductility resistance and low-temperature fracture resistance, longer construction time, simple construction process, low-carbon and environment friendliness and the like and is suitable for paving pavements of roads, bridges, tunnels, airfield runways and the like. The invention discloses a preparation method of the high-performance epoxy resin asphalt warm mixing agent.

The invention provides an adjustable leveling guide rail. The adjustable leveling guide rail comprises a guide rail beam and a plurality of supporting pieces, wherein each supporting piece comprises a screw rod and a nut; the screw rod is connected with the guide rail beam through the nut; the end part of the screw rod is provided with a fixing block which is hexagonal, tetragonal or triangular; the fixing block is connected with the screw rod in an integral molding mode or the fixing block is detachably connected with the screw rod; and the supporting piece also comprises a positioning piece connected with the screw rod in a fitting mode. The invention also provides a leveling method for realizing the leveling guide rail, namely, the levelness of the leveling guide rail is adjusted by rotating a leveling nut and a positioning nut. In a construction process, instant leveling is realized by clamping the fixing block, fixing the screw rod and adjusting the levelness of the guide rail by screwing the positioning nut and the adjusting nut respectively. The adjustable leveling guide rail has high leveling accuracy, can realize instant leveling in the construction process and has the advantages of low cost, convenient detachment, easy construction, clean environment, green construction and the like.

The invention discloses a transformation and construction method used for facing bare concrete of an existing building outer wall. The method comprises the steps of processing of a formwork, binding of reinforcing steel bars, installation of bare formwork, casting of the bare concrete, removal of the bare formwork, maintenance of the bare concrete, cutting of visible joints, blocking and repairing of split bolt holes and coating of protective paint. According to the method, a steel formwork of which the inner surface is attached to a stainless steel board servers as the bare formwork,, reinforcing steel bar meshes serve as structural bars, the self-compaction bare concrete serves as a bare concrete mixture, and the construction of a thin-type bare concrete faced wall is finished in the mode that many times of rolling over construction are conducted from the bottom to the top of the existing building outer wall. The method not only improves the appearance quality of the bare concrete, but also ensures close integration between the newly-cast bare concrete and the existing building outer wall.

The invention provides a construction device and construction method for a stirring and spraying expanded reinforcement pile. The construction device is characterized in that a drill pipe is formed by coaxially overlapping an outer pipe body and an inner pipe body in a sleeving mode and provided with a rotary power mechanism, a lifting device and a variable-diameter telescopic stirring arm; the inner pipe body is provided with a spiral drill bit and a spraying nozzle, and high-pressure ejection, forced stirring, improvement on the drilling speed and adjustment of the specifications of a pile body and an expanded body are realized through the operations of arm folding, arm unfolding, rotating, high-pressure grouting and the like. The construction method is characterized in that the setting parameters and design scheme of the pile body and the expanded body of the reinforcement pile are designed in advance. The method includes the particular construction steps that (1) pile positions are aligned; (2) the expanded body and the pile body of the reinforcement pile are constructed in a mode A (from top to bottom) or mode B (from bottom to top) according to the advanced design; (3) the stirring and spraying expanded reinforcement pile which accords with the advanced design and is provided with the expanded body is formed; and (4) subsequent construction is carried out through multiple methods and includes manufacturing of a reinforcement body pile body and pile end carriers and laying of a cushion layer.

The invention discloses a supporting method for soft broken nonuniform stratum tunnel construction. The supporting method includes the steps that firstly, an arch support is erected in a bottom layer tunnel through steel pipes, and the portion, on the top of the arch support, of the bottom layer tunnel is drilled; secondly, a small pipe roof is constructed on the drilled portion of the arch crown of the arch support; thirdly, during construction of the small pipe roof for supporting, advanced reinforcement treatment is conducted on a top arch of the tunnel through advanced small pipes in a floor staggered mode; fourthly, the tunnel is excavated; fifthly, after the tunnel is excavated, preliminary supporting construction is conducted in time each cycle; sixthly, after excavation and supporting of a tunnel trunk of the tunnel, an inverted arch is constructed and sealed into a loop; and then secondary lining following operation is conducted. The method has the advantages that deformation of tunnel surrounding rocks can be effectively reduced, self-stabilization and seepage prevention capacity of the tunnel is permanently improved, a multifunctional surrounding rock reinforcement region is formed, and safety of tunnel constructors and equipment is guaranteed.