30results about How to "Meet the needs of rapid construction" patented technology

The invention discloses a water-rich weak surrounding rock long-and-big tunnel construction method. The method includes that a tunnel inclined shaft is arranged on one side of a main tunnel of a tunnel to be constructed, the main tunnel is divided into a tunnel entry section, a tunnel exit section and a middle connecting section connected between the tunnel entry section and the tunnel exit section, the middle connecting section is divided into an inclined shaft assisting construction entry section and an inclined shaft assisting construction exit section, and each of the tunnel entry section, the tunnel exit section, the inclined shaft assisting construction entry section and the inclined shaft assisting construction exit section is divided into multiple sections for construction. A construction method of each section includes: step 1, performing geological forecasting in advance, and when a debris flow formation exists ahead, entering a step 2, or else, entering a step 3; step 2, performing stability control construction; step 3, determining a primary supporting scheme; step 4, excavating the tunnel, and performing primary supporting construction; step 5, performing secondary lining construction on the tunnel. The water-rich weak surrounding rock long-big tunnel construction method is simple in step, reasonable in design, simple and convenient to construct, good in using effect, capable of meeting construction requirements of water-rich weak surrounding rock long-and-big tunnels, short in construction period and safe in construction process.

The invention relates to a fast rail-exchanging vehicle for a jointless track and a rail-exchanging method. The front and back ends of a travel mechanism of a fast rail-exchanging vehicle for a railway are provided with a guardrail recovering device; a crosstie-pressing device, a steel rail retraction device for clamping and moving a new steel rail and an old steel rail, a steel rail clincher and an operating position are arranged at intervals below the vehicle body between two bogies of the travel mechanism, the operating position is arranged according to the need; and the crosstie-pressing device and the steel rail clincher are arranged respectively close to the bogies at the two ends; and the vehicle can perform the marshalling operation together with the auxiliary vehicles, such as a fastener recovered vehicle, and the like. When the fast rail-exchanging vehicle for the railway is adopted for construction, the operation is divided into two parts of the old steel rail retraction operation and the new steel rail retraction operation which are synchronously carried out. The vehicle can reach the rail-exchanging speed of more than 2km/h, can be applied to the fast rail-exchanging need of the jointless track, complete the rail exchanging within 50 meters and is suitable for the construction needs of the section with less curve radius. The invention has the advantages of safety and high degree of automation.

The invention relates to a railway construction machine guard rail hoisting device and a rail replacing locomotive guard rail hoisting device, comprising a guard rail hoisting apparatus and an anti-loosing device, wherein the guard rail hoisting apparatus is arranged below a railway construction machine, such as a rail replacing operation vehicle traveling mechanism vehicle body and can integrally lift and transversely move a railway construction machine vehicle body, and the anti-loosing device is arranged on each steering frame of a steel rail traveling machine to enable the steering frames and the vehicle body to be vertically fixed into a whole. The guard rail hoisting apparatus comprises an elongated supporting body, a guard rail suspension bracket and a control device, wherein the supporting body is fixedly suspended below the vehicle body through the guard rail suspension bracket, the control device is used for controlling the movement of the supporting body, a guard rail assembly is respectively arranged at both ends below the supporting body, the control device comprises two telescopic guard rail vertical oil cylinders and telescopic guard rail integral swinging oil cylinders, and the guard rail suspension bracket is provided with two downward stretching struts which are respectively hinged with both ends of the supporting body through two guard rail support rods. The invention enables a railway which needs to be born but is not completely fixed to be kept in an upright state in the construction process, farthest prevents the occurrence of a turning-way accident, and also enables the turning-way railway construction machine to rapidly hoist and safely reset.

The present invention provides a total solid beam contraction type steel corrosion monitoring sensor and a preparation method thereof. The total solid beam contraction type steel corrosion monitoring sensor comprises three graphite beam contraction rings, three total solid reference electrode, two sensor fixing racks, three sets of beam contraction protecting casing and three sets of PVC tubes used for packing the total solid reference electrodes and leading out the conducting wire. The invention uses finite elements for analyzing the arrangement characteristic of potential wire in solid dielectric of concrete, and at the same time adopts a long-lifetime and total solid reference electrodes which are developed independently for realizing the control to the area of working electrode in the corrosion monitoring process with the electrochemistry method. Finally the total solid beam contraction type corrosion sensor which has reasonable structure and is suitable for the application of actual project is designed out. A designing concept of ''plug and play'' is adopted in the designing process of sensor. The fast construction requirement can be satisfied, and the laying process of the sensor is greatly simplified.

The invention discloses a convenient prefabricated plate brick membrane installing method which includes the steps of coating mortar bonding layers (5) on the upper surface of a ground beam cushion layer (4), wherein the position of the mortar bonding layer (5) corresponds to the position of a concrete hollow prefabricated plate to be installed (1); arranging the concrete hollow prefabricated plates to be installed (1) on the upper surfaces of the mortar bonding layers (5) to form a prefabricated hollow concrete brick membrane, wherein the concrete hollow prefabricated plate (1) is along a vertical direction; arranging a temporary support (6) between the concrete hollow prefabricated plates (1) for reinforcement; placing soil on the outside of the concrete hollow prefabricated plate (1) and arranging a basic layer (2) on the backfill (3); when the backfill (3) and the basic layer (2) are completed, and the prefabricated plate brick fetal membrane is stabilized, removing the temporary support (6) after the prefabricated plate brick membrane becomes firm. The convenient prefabricated plate brick membrane installing method effectively solves the problems of large work amount of brickmasonry as brick membrane construction and more manpower input.

The invention discloses a steel fiber modified PVA fiber reinforced cement-based composite material and a preparation method thereof.The steel fiber modified PVA fiber reinforced cement-based composite material comprises the following components in parts by weight:450-650 parts of sulphoaluminate cement,190-300 parts of water,440-670 parts of sand,500-830 parts of crushed stone,85-150 parts of ground slag,40-65 parts of fly ash,3-6 parts of a PVA fiber,70-110 parts of a steel fiber,2-5 parts of a high-efficiency water reducing agent and 0-2 parts of an early strength agent.Compared with thesingle early strength agent, anorganic-inorganic composite early strength agent has good economic benefit, the early strength enhancement rate may achieve or exceed the superposition of the strength enhancement rates when the components are used alone, and more obvious economic and technical effects are obtained.The steel fiber is provided with an end hook, so that the bonding strength is high, the main pulling force can be borne after cracks are generated, and a large amount of energy can be absorbed.The mixed use of the two fibers can play a role in different layers, generate synergistic effect, jointly prevent crack propagation and enhance the toughness of concrete.

The invention discloses an intelligent riverway management and control system, which belongs to the technical field of intelligent riverway pipelines, and is characterized by comprising an infrastructure layer, a data layer, a service layer and an application layer, wherein the infrastructure layer comprises a development environment system, a database management system, an operating system, a network environment and hardware equipment; the infrastructure layer provides a server, a switch, a terminal, safe and stored software and hardware, a place and a network communication environment for the data layer, the service layer and the application layer, wherein the data layer is a service basic database and is used for storing basic data, and the data layer provides IoT data support for different application systems; the service layer comprises an equipment monitoring perception service, an equipment connection management service, a model and monitoring data exchange service and an authority control service; the application layer comprises an intranet portal website and an extranet portal website; and the infrastructure layer, the data layer, the service layer and the application layer perform data interaction in sequence through a data exchange system.

The invention belongs to the technical field of medical facilities, and particularly relates to an isolation negative pressure shelter for infectious disease prevention and control. The isolation negative pressure shelter comprises a base and a cover plate group, wherein a wall body group is mounted between the base and the cover plate group, the wall body group comprises a fixed wall, a movable wall and two foldable side wall groups, a door frame is arranged on the fixed wall, and a sealing door is mounted in the door frame. The base comprises two underframe groups and a plurality of supporting plates detachably mounted between the two underframe groups, each side wall group comprises a plurality of side wall plates which are hinged in sequence, the fixed wall and the movable wall are parallel to each other, a first fixing structure is arranged between the side wall plates and the underframe groups, and the cover plate group comprises a first cover plate, a second cover plate and a plurality of third cover plates. The third cover plates are sequentially connected between the first cover plate and the second cover plate, and a second fixing structure is arranged between the cover plate group and the wall body group. The negative pressure shelter aims to solve the problems that due to the structural defects of an existing negative pressure shelter, assembling is complex, the construction time is long, and the rapid construction requirements during epidemic outbreak are difficult to meet.

The invention discloses a modular prefabricated reinforced concrete hollow pier structure and anassembly method thereof. The structure includes a cast-in-place cushion cap, transverse-assembly pier segments, vertical prestressing bars and assembly cap beams. Each transverse-assembly pier segment includes left and right asymmetric assembly sections, a middle assembly section and a steel bar connector, wherein the left and right asymmetric assembly sections are connected with the middle assembly section through the steel bar connector and finish rolling thread steel. The transverse-assembly piersegments are vertically overlapped with staggered joints and connected with the vertical prestressing bars, and the vertical prestressing bars are tensioned in multiple stages, and the assembly cap beams are divided into several sections and connected through transverse prestressing bars. According to the lifting capacity and construction mode of construction equipment, the height and transverseblock size of the transverse-assembly pier segments can be divided, installation is easy, horizontal and vertical assembly and connection are reliable, construction is convenient, and the transportation and assembling problems of prefabricated components of a modular prefabricated reinforced concrete hollow pier in complex mountainous environment can be solved.

The invention discloses a high-heat-insulation heat preservation plate. The high-heat-insulation heat preservation plate comprises a first base plate and a second base plate, the two ends of one sideof the first base plate are connected with first connecting plates, one side of each first connecting plate is connected with a first sliding plate, the two ends of one side of the second base plate are provided with first clamping grooves, and one side of each first clamping groove is provided with a first sliding groove. The first base plate and the second base plate can be preliminarily splicedby inserting second connecting plates and second sliding plates at the two ends of one side of a protruding block into second clamping grooves in the inner walls of corresponding first grooves and corresponding second grooves, the first connecting plates and the first sliding plates on one side of the first base plate are inserted into the first clamping grooves in one side of the second base plate, the one side of the first base plate is tightly attached to one side of the second base plate, thus the first base plate and the second base plate can be spliced and mounted secondly, the first base plate and the second base plate can be spliced, so that splicing, mounting and demounting are convenient, the splicing efficiency is high, and the requirement for rapid construction can be met.

The invention discloses a construction method for rapid underwater repair of leakage cracks of a concrete faced rockfill dam. The construction method for rapid underwater repair of the leakage cracksof the concrete faced rockfill dam comprises the following steps in sequence: step 1, washing is carried out from top to bottom along the cracks to ensure that the concrete base surface is washed out;step 2, the concrete base surface is washed again; step 3, even painting of a underwater epoxy cement prime coat is carried out along the cracks from top to bottom; step 4, underwater rapid sealing materials are rolled into a cylindrical shape, the materials are bagged and sent underwater; step 5, the cylindrical underwater rapid sealing materials are pressed tightly along the cracks, and it is guaranteed that the middle is thick and the two sides are thin after pressing; step 6, after a flexible surface protection layer is spread underwater along the cracks, a fixed structure is used for fixing the flexible surface protection layer to the concrete base surface; step 7, after all procedures are completed, the treatment area is checked. The construction method for rapid underwater repair of the leakage cracks of the concrete faced rockfill dam has the advantages of simple materials, rapid construction, and capability of meeting rapid construction requirements during underwater emergency treatment. The invention further discloses a rapid underwater repair structure for the leakage cracks.

The invention relates to the technical field of building equipment, in particular to a three-point positioning measuring, setting and placing device and method. The three-point positioning measuring, setting and placing device comprises a first rod piece, a second rod piece, a third rod piece and a placing seal; the shortest distance between the point position of a to-be-measured setting point and the upper, lower, left and right edges of the building unit is a first distance a, the second shortest distance between the point position of the to-be-measured setting point and the upper, lower, left and right edges of the building unit is b, and the second edge is perpendicular to the first edge. A point position of a setting point to be measured and a certain point of the first edge are connected to form an oblique line, an included angle alpha between the oblique line and the first rod piece is 30-60 degrees, the length of the oblique line is c, the length of the first rod piece is a, the length of the second rod piece is b, an included angle alpha between the third rod piece and the first rod piece is alpha, and the length of the third rod piece is c. The device provided by the invention has the advantages of high speed of measuring and setting points, small error and capability of reducing material waste.

The invention discloses a conveniently-regulated standard single roof structure for supporting an aluminum formwork special for lightning protection of a high-speed rail. The conveniently-regulated standard single roof structure comprises an inner roof cylinder and an outer roof cylinder sleeving the inner roof cylinder, wherein a plurality of limiting holes are symmetrically formed in two sides of the inner roof cylinder; one end of the outer roof cylinder is welded with a threaded sleeve mutually matched with the inner roof cylinder; the threaded sleeve is provided with a sleeve nut mutually matched with the threaded sleeve; the sleeve nut is provided with a handle through a rivet; two sides of the threaded sleeve are symmetrically provided with limiting grooves mutually matched with the limiting holes; the limiting grooves and the limiting holes are internally provided with annular plug pins mutually matched with the limiting grooves and the limiting holes; and each annular plug pin comprises an inserting end, a supporting section connected with the inserting end and a handle end connected with the supporting section, wherein the inserting end and the handle end are staggered.