469 results about "Culvert" patented technology

The invention discloses a road culvert inner wall damage image detection and traffic capacity evaluation method and system, and relates to the technical field of road engineering detection and computer vision, and the method comprises the steps: collecting multi-source data through an annular camera, a laser section scanner and a mileage encoder carried by a detection robot, and carrying out the panoramic expansion and time-space registration; using a multi-scale attention panoramic segmentation network to identify damages such as lining cracks, joint slab staggering, damage and chipping, steel bar exposure and water leakage; calculating the clearance size and the deposition thickness of the culvert by adopting an ellipse fitting method; according to the method, the culvert detection speed reaches 50 m / h, and the damage detection accuracy reaches 89% or above.

The utility model discloses a down-the-hole type fish passing device which mainly comprises a fish passing channel and a water passing flow channel. Wherein the fish passing channel is a passing channel for fishes to pass through a dam and is provided with two working gates; flow control assemblies for controlling the flow rate and the flow speed of water flow in the fish passing channel are arranged in the water passing channel and are divided into two groups; and each group of flow control components are arranged at a working gate of the fish passing channel and are symmetrically arranged along the two sides of the fish passing channel. The fish passing channel is of a culvert type structure and is provided with an upstream inlet and outlet and a downstream inlet and outlet. The flow control assembly comprises an inlet flow channel, a flow valve and an outlet flow channel; a water inlet of the inlet flow channel is in butt joint with an upstream water passing hole of the service gate. A water outlet of the outlet flow channel is in butt joint with a downstream water passing hole of the service gate, and the inlet flow channel and the outlet flow channel are connected through a flow valve. The down-the-hole type fish passing device has the advantages that the down-the-hole type fish passing device has excellent hydraulic characteristics, and a good passing environment is uniformly provided for fishes; the method is suitable for buildings with high, medium and low water heads.

The invention provides an intelligent deviation correction control method and system for box culvert pushing, and relates to the technical field of underground engineering construction.The method comprises the steps that a box culvert three-dimensional model is constructed by collecting construction related data; simulating the space change trend of the attitude structure of the box culvert under different working condition parameters by utilizing a virtual construction technology, generating a correction control instruction by combining with the box culvert three-dimensional model, and collecting attitude data of the box culvert after executing the instruction so as to adjust the attitude structure of the box culvert in the box culvert three-dimensional model to obtain a corrected box culvert three-dimensional model; and performing correlation analysis on the corrected box culvert three-dimensional model, the position data of the existing line, the trend data of the underground pipeline and the burial depth data to adjust the correction control instruction until the actual attitude deviation of the corrected box culvert three-dimensional model meets a preset box culvert construction condition. Intelligent deviation correction control over the box culvert in the incremental launching construction process is achieved, and the real-time sensing capacity and structural safety of box culvert incremental launching construction in complex underground engineering are improved.

This invention provides a precast box culvert for urban roads and its jacking construction method. The precast box culvert includes a precast box culvert body, with interfaces suitable for sealing and insertion at both ends. Multiple insertion holes are arrayed at the first end of the box culvert body, and multiple pins are arrayed at the second end of the box culvert body opposite to its first end. Each pin is adapted to be inserted into a corresponding insertion hole. A locking structure is provided between the pin and the insertion hole. When the first end interface of one box culvert body is inserted into the second end interface of another box culvert body, the locking structure locks the pin in the corresponding insertion hole. The precast box culvert and its jacking construction method provided by this invention not only ensure stable and reliable connection between adjacent box culvert bodies, but also eliminate the need for on-site secondary pouring during the jacking construction process, greatly improving the efficiency of jacking construction and shortening the construction cycle.

The utility model discloses a movable assembly type formwork for box culvert construction, which belongs to the technical field of box culvert formworks, and comprises an inner formwork and an outer formwork, the inner formwork comprises a bottom longitudinal beam, the bottom longitudinal beam is fixedly connected with a plurality of first support rods respectively, the first support rods are sleeved with first connecting pipes in a sliding manner, and the first connecting pipes are sleeved with second connecting pipes respectively; the end, away from the first supporting rod, of the first connecting pipe is slidably sleeved with a second supporting rod, transverse rods are fixedly connected to the second supporting rod, a second connecting pipe is arranged between the two transverse rods, hydraulic oil cylinders are fixedly installed on the first supporting rod, the second supporting rod and the transverse rods respectively, and inner formworks are detachably installed on piston rods of the hydraulic oil cylinders. The outer formwork comprises a support, an outer formwork is installed on the support, and idler wheels are installed at the bottom of the bottom longitudinal beam and the bottom of the support respectively. The utility model solves the problems that in the manufacturing process of the box culvert in the prior art, due to different sizes of the box culvert, the construction of a formwork is easily limited, the formwork is difficult to mount, dismount and circulate, the construction period is seriously restricted, and the construction cost is increased.

The batch box culvert pouring mold comprises an outer mold unit and an inner mold unit, the outer mold unit comprises a base, a bottom plate, two sets of side plates, a top plate and a rear plate, the rear plate and the bottom plate are integrally formed, the side plates are connected with the top plate and the bottom plate through telescopic rods, and the surfaces of the side plates are provided with third protrusions and U-shaped plates with fourth protrusions; the inner mold unit comprises an inner forming mold, a moving rod and a linkage plate, the linkage plate is provided with a first protrusion and a second protrusion, and a sleeving frame with a convex attaching strip is detachably fixed in an annular groove of the inner forming mold through a screw. After concrete is poured and solidified through the top plate injection groove, the moving rod drives the internal forming mold to drive the linkage plate to act, approaching positioning and separation of the side plates are achieved through linkage of the protrusions, the box culvert is moved out along with the inner mold by means of friction force of the attaching strips, and the box culvert and the inner mold can be separated by disassembling the screw. The demolding process is simplified, automatic operation is achieved, the labor intensity is reduced, the continuity, stability and forming quality of batch production are guaranteed, and the mold is suitable for a box culvert batch production scene.

This invention discloses a traction device and a maintenance culvert for a deep-sea submersible undergoing maintenance. The traction device includes: a first traction assembly disposed on both sides of the axis of the maintenance culvert and movable along the axis of the maintenance culvert; a traction rope for connecting the first traction assembly to both ends of the deep-sea submersible and driving the deep-sea submersible to move within the maintenance culvert via the first traction assembly; and a second traction assembly for providing traction force to both sides of the deep-sea submersible after it has been pulled into position by the first traction assembly, to prevent the deep-sea submersible from swaying. By applying force to both ends of the deep-sea submersible using the traction rope via the first traction assembly, the deep-sea submersible can be dragged within the maintenance culvert, thereby reaching a designated position within the maintenance culvert. Simultaneously, the second traction assembly provides traction force to both sides of the deep-sea submersible to prevent swaying and ensure stable positioning of the deep-sea submersible.

The invention relates to the technical field of rainwater and sewage pipe culvert construction, in particular to a rainwater and sewage square culvert tail end plugging stop block and a construction method.The rainwater and sewage square culvert tail end plugging stop block comprises a plugging block, the side end face of the plugging block is of a right trapezoid structure with the narrow upper portion and the wide lower portion, the upstream face of the plugging block is a vertical face, and the downstream face of the plugging block is an inclined face; second haunch angles matched with the first haunch angles at the bottom of the square culvert are arranged on the two sides of the bottom of the plugging block respectively, and a hanging ring is arranged at the top of the plugging block. The gravity type trapezoidal structure with the narrow upper portion and the wide lower portion is adopted, the anti-floating capacity and the anti-overturning capacity are high, large-flow and high-flow-speed water flow impact can be resisted, the check blocks are prefabricated parts and only need to be hoisted in place on site, the underwater operation risk is avoided, the plugging construction time is greatly shortened, and a follow-up construction working face can be rapidly provided.

The box culvert structure comprises a culvert and a flood discharge gate which is arranged at the outlet end of the culvert and can be opened, an overflow weir is arranged in the middle of the inlet end of the culvert, symmetrical concave plates are arranged on the side wall of the overflow weir and the inner wall of the culvert, pluggable water blocking plates are arranged in the concave plates, and the upper ends of the water blocking plates are higher than the upper end of the overflow weir. The overflow weir and the water blocking plate are matched to shield lake water outside the water facing opening of the culvert, so that when the lake water outside the water facing opening of the culvert is higher than the bottom end of the culvert, maintenance personnel can also enter the culvert to maintain a flood discharge gate in the culvert, and the maintenance does not affect the water level of the lake.

This utility model relates to the field of cement culvert production technology, specifically a vibration compaction device for cement culverts after cement pouring. It includes a frame, with a control shell fixedly connected to the top of the frame. A motor is fixedly connected to the rear side of the control shell, and a screw is fixedly connected to the front side of the motor's output end through the control shell. This utility model uses a cylinder to control the height of the adjustment box and clamping plates, positioning the cement culvert mold on the ground between two clamping plates. A hydraulic cylinder controls the movement of the sliding sleeve and clamping plates, clamping and fixing the mold. The cylinder then resets the mold, and the motor and screw control the movement of the threaded sleeve and adjustment box, transferring the mold to the top of the vibration table. The vibration table vibrates to defoam the concrete poured in the mold. After defoaming, the mold is transferred back to the ground, and the above steps are repeated for other molds.

The utility model provides a spliced portable water guide device. The spliced portable water guide device comprises a water retaining device and a flow guide device, the water retaining device is arranged at a culvert water inlet and comprises a plurality of first water retaining sections and two second water retaining sections. The multiple first water retaining sections and the two second water retaining sections are spliced into a strip-shaped structure, and the multiple first water retaining sections are located between the two second water retaining sections; the cross section of the first water retaining section and the cross section of the second water retaining section are each of an L-shaped structure. A water guide opening is formed in the face, close to the culvert water inlet, of the first water retaining section, and the water guide opening is in threaded connection with the flow guide device, so that the problem that the construction efficiency is affected due to the fact that the flowing water flow guide difficulty of a lengthened culvert is large is solved.

The invention discloses an intelligent mechanical cutter suction system based on culvert dredging, and relates to the field of intelligent control, the intelligent mechanical cutter suction system comprises a mobile bearing module, the left side of the top end of the mobile bearing module is provided with a mechanical arm execution component, and the center of the top end of the mobile bearing module is provided with a main control unit, the power module is used for providing moving capacity and overall power support for all functional parts and modules through a walking mechanism and an energy system; the mechanical arm execution component is used for executing cutter suction dredging operation through a mechanical arm driven by the hydraulic driving system and a hydraulic cutter suction head at the tail end of the mechanical arm; when facing complex and changeable culvert deposits, the device always keeps the most efficient cutting and suction state, the overall dredging time is greatly shortened, the operation accuracy and consistency are improved, the mechanical structure overload and collision risks caused by rough operation or path deviation are reduced, and the service life of a core working device is prolonged.

The utility model provides a kind of culvert inner wall coating construction device and method based on rainwater and sewage diversion, including the culvert inner wall coating construction device body with strip beam (1), mesh (93) being arranged between strip beam (1), for the intermediate medium spot raw material liquid injection of mesh (93) spray nozzle (98), through culvert inner wall coating construction device body, realize the culvert inner wall coating construction operation, through mesh (93) and spray nozzle (98), realize the intermediate medium spot on the culvert inner wall, realize the intermediate medium layer on the culvert inner wall and precast to the raw material of culvert inner wall coating body produce effect, solve the technical problem that all use concrete mortar to smear between the concrete mortar is smeared on the culvert inner wall, due to the higher humidity inside culvert inner wall, thereby the solidification of concrete mortar and the adhesion force with culvert inner wall are influenced, thus improve culvert inner wall coating construction effect.

The invention relates to the technical field of engineering structure health monitoring, in particular to an electric power engineering drainage box culvert monitoring system, a construction method and a monitoring method. The monitoring system comprises a monitoring element and a data processing unit; the monitoring element comprises a strain sensor and a temperature sensor which are arranged on the inner side of a reinforcement cage of the drainage box culvert; the static leveling instrument is arranged on the concrete surface of the drainage box culvert; the single-axis clinometers are arranged on the central axis of the top plate and the side wall of the drainage box culvert; the flow velocity sensor is fixed on the internal section of the drainage box culvert through a bracket; and the strain sensor, the temperature sensor, the static leveling instrument, the single-axis clinometer and the flow velocity sensor are all connected with the data processing unit. According to the system, the technical problems of discontinuous monitoring, incomplete parameters, weak data association and the like in long-term health monitoring of the large drainage box culvert are solved, and real-time and accurate evaluation and early warning of the safety state of the box culvert are realized.

The application relates to a municipal pipe culvert pressurized jet dredging device, which comprises a mounting sleeve frame, a walking device, a pressurized main body, a jet pipe and a longitudinal cutting cutter. One end of the mounting sleeve frame is a circular cylinder, the other end is a tapered cylinder with a reduced diameter, a circular cover plate is welded to the bottom surface of the circular cylinder, and multiple height-adjustable casters are arranged on the side surface of the circular cylinder and are arranged on the inner side of the pipeline. In the application, two layers of water outlets are arranged, the upper and lower pipe walls can be dredged simultaneously or individually, the pipeline is arranged in an arc shape, the direction and strength of water flow are guaranteed, and the accumulated dirt on the pipe wall in the circumferential and longitudinal directions can be cleaned.

This invention relates to the field of precast box culvert construction technology, specifically a precast box culvert construction method, including the following steps: construction preparation, rebar processing and binding, formwork installation, concrete pouring, concrete curing, culvert section storage, transportation and installation, and joint and waterproofing treatment. This invention has the following advantages: It employs centralized precasting in a closed shed, effectively avoiding the impact of severe weather such as strong winds, rain, and snow on culvert section construction; the culvert sections are precast horizontally, reducing construction difficulty; and the use of sleeves to connect the main reinforcing bars avoids the adverse effects of strong winds on welding quality during arc welding. Furthermore, the use of an adjustable rebar binding platform enables rapid and precise rebar binding, ensuring the quality of the rebar binding spacing and protective layer. This effectively solves the binding difficulties caused by the variety of rebar types and limited space in culvert sections.

This utility model relates to the field of building construction, and more particularly to an assembled steel culvert gate. The assembled steel culvert gate includes a steel pipe with multiple reinforcing rings installed on its outer side. Multiple reinforcing haunches are connected to both ends of the outer side of the steel pipe, and panels are installed at both ends of the outer side of the steel pipe. A gate is installed on one of the panels, located at one end of the steel pipe. Main crossbeams are installed at the top and bottom of the two panels on opposite sides. The assembled steel culvert gate provided by this utility model uses a steel pipe as the main load-bearing structure, combined with a support system composed of reinforcing rings, reinforcing haunches, and longitudinal and transverse steel channels. This effectively resists soil pressure, water flow impact, and ground loads, exhibiting high structural strength and good stability. Even under conditions of uneven foundation settlement, the good toughness of the steel structure can prevent serious damage such as cracking and fracture, ensuring the long-term stable operation of the culvert gate.

The utility model discloses an embankment-penetrating drainage culvert type which comprises an upstream drainage culvert, a downstream drainage culvert and an inspection well, the inspection well is located between the upstream drainage culvert and the downstream drainage culvert, an outlet of the upstream drainage culvert is communicated with the inspection well, and an inlet of the downstream drainage culvert is communicated with the inspection well. And the outlet of the upstream drainage culvert is higher than the inlet of the downstream drainage culvert. According to the drainage culvert type, the height difference between an inlet and an outlet of the drainage culvert on the two sides of the dike is eliminated by arranging the inspection well in the middle, the safety and stability of the structure can be met, and the ecological landscape of a river channel can be guaranteed while the flood drainage problem is solved.

The utility model discloses a vertical pouring prefabricated box culvert shaping template which comprises an outer forming die and an inner forming die, a pouring cavity is formed between the outer forming die and the inner forming die, and the outer forming die is formed by splicing two first supporting side templates and two second supporting side templates. The adjacent first supporting side formwork and second supporting side formwork are detachably connected through a sealing connecting assembly, a lower sealing assembly is arranged at the bottom of the outer forming die, a synchronous inner supporting assembly is arranged in the inner forming die, and a pouring sealing assembly is arranged at the top of the outer forming die. The box culvert pouring sealing device has the advantages that the structure is simple, uniform pouring work of concrete is facilitated, demolding work of a formed box culvert is facilitated, the overall sealing performance is good during pouring, stable supporting can be provided for an inner forming mold, and the problem of deformation of the inner forming mold is avoided.

The utility model discloses a kind of multifunctional box culvert detection unmanned ship, including detection unmanned ship body, the outer surface of this detection unmanned ship body is fixedly connected with lead-in line pole, and the connecting box perpendicularly welded with the one end of lead-in line pole;Collision separation mechanism for separating detection unmanned ship body and box culvert, including with the mounting outer frame of detection unmanned ship body through bolt fixation, the connecting rod of one end insertion mounting outer frame inside;Through the mounting outer frame and deflection component of design, under the separation effect of mounting outer frame and deflection component, make detection unmanned ship body and box culvert inner wall or obstacle separate, with the function of anti-collision, avoid the case that detection unmanned ship body directly collides with box culvert inner wall or obstacle and is damaged, electric push rod drive contact block is pressed against box culvert inner wall, make detection unmanned ship body and the inclination between box culvert inner wall, beneficial to the detection unmanned ship body of navigation leaving box culvert inner wall, with the function of anti-collision and change detection unmanned ship body angle.

The utility model relates to water conveyance engineering technical field, concretely relates to a long distance tunnel water conveyance device. The device includes import box culvert section, water conveyance tunnel section and pressureless tunnel section, import box culvert section, water conveyance tunnel section and pressureless tunnel section are all horizontal section, the import shaft is arranged between import box culvert section and water conveyance tunnel section, the top of import box culvert section is communicated with import shaft, and one end of water conveyance tunnel section is communicated with the bottom of import shaft, the export shaft is arranged between water conveyance tunnel section and pressureless tunnel section, the other end of water conveyance tunnel section is communicated with the bottom of export shaft, and pressureless tunnel section is communicated with the top of export shaft. The utility model can realize tunnel section smooth full pipe, greatly restrain the difficult to predict clear full flow separation point movement, intense pressure pulsation and water flow turbulence in water filling mode.

The utility model relates to the technical field of box culvert transportation, in particular to a simple special lifting appliance for a box culvert, which comprises a grid beam, a hanging ring is arranged above the grid beam, a connecting component is arranged between the hanging ring and the grid beam, the connecting component comprises a steel rope and a tightener, and connecting seats are correspondingly welded on the upper side and the lower side of the grid beam. Shackles are arranged on the connecting seat, the shackle on the upper side is connected with a tightener, and the shackle on the lower side is connected with a clamp; the clamp comprises a U-shaped frame, a steel bar bolt and a bolt pin, the top end of the U-shaped frame is connected with the shackle, a placement frame corresponding to the steel bar bolt is arranged on one side of the U-shaped frame, a steel bar pin hole corresponding to the steel bar bolt is formed in the lower side of the U-shaped frame, and an anti-falling pin seat is arranged on the side, close to the steel bar pin hole, of the U-shaped frame; the box culvert lifting appliance is composed of the grid beams and the clamps, the side walls of the box culvert are connected through the U-shaped frames and the steel bar plug pins, and the steel bar plug pins are high in bearing capacity, not prone to deformation, resistant to abrasion, more practical, safer and more reliable.

The utility model provides a box culvert steel formwork hoisting machine convenient to adjust, which comprises a portal frame, the portal frame comprises two tripods, a cross beam is welded between the top ends of the two tripods, and first wheels are arranged at the bottoms of the tripods; a sliding frame is connected to the cross beam in a sliding mode, a suspension assembly is arranged at the center of the bottom of the sliding frame, suspension rods are fixedly installed at the four corners of the bottom of the sliding frame, clamping assemblies are fixedly installed at the bottom ends of the suspension rods, and an auxiliary supporting piece is arranged at the top of the sliding frame. The box culvert steel formwork transferring device has the advantages that the distance between the clamping plates can be conveniently adjusted, and the box culvert steel formwork transferring process is stable.

A medium-retaining plate for a drainage system is provided, having one or more filter blocks. The plate may include a first slot configured to allow air passage and a second slot configured to allow water passage during air backwashing. The medium-retaining plate is configured to facilitate backflow of water into one or more filter blocks through the second slot while maintaining airflow through the first slot to generate optimal collapse pulses. The first and second slots are of uniform size and evenly spaced to facilitate the generation of relatively small collapse pulses during continuous air-water backwashing. Multiple inserts may be arranged around the base of the bottom surface of the medium-retaining plate. The inserts improve the structural integrity of the medium-retaining plate and prevent the medium-retaining plate from lifting.

The invention belongs to the technical field of road buried glass fiber reinforced plastic mortar pipe culvert construction, and particularly relates to a solid waste resourceful treatment method for double-row glass fiber reinforced plastic mortar pipe construction, which comprises the following steps of: vertically excavating a foundation pit, supporting by using Larsen U-shaped steel sheet piles, compacting a base, and replacing and filling undesirable soil with natural gravel soil. After the base is accepted and accepted, an inverted filter layer is laid, and gravels of 20 cm are laid. Reinforced concrete end and middle prefabricated blocks are prefabricated in a factory, and asbestos cushion layers are attached into the prefabricated blocks. And the elevation and the axis of the pipe culvert are accurately measured, a temporary weight is arranged in the pipe culvert to prevent floating, the double-row glass fiber reinforced plastic sand inclusion pipe culvert is hoisted in place, and cushion layer attachment is checked. The method comprises the following steps: mixing and pouring mixed slurry consisting of solid waste ash and quick-hardening cement by using special equipment, backfilling the mixed slurry until the elevation of an excavated pavement is below 30cm, then backfilling slag to the excavated surface of the roadbed, and compacting by using a light road roller. And entering a curing period after compaction. According to the method, solid waste resource utilization with the liquid fly ash and the furnace slag as the core is achieved, and the construction efficiency is remarkably improved.

This invention discloses a method for underpinning culvert foundations in roadbeds, relating to the field of civil engineering technology. The method includes the following steps: cleaning the culvert to expose the culvert foundation; installing support components on both sides of the culvert foundation to support the cover plate; breaking the bottom slab in the middle of the culvert and re-pouring reinforced concrete at the bottom slab location; installing support components on the re-pouring reinforced concrete to support the cover plate; breaking the bottom slabs on both sides of the culvert and under the support walls, and then re-pouring reinforced concrete to replace the original bottom slabs; after the re-pouring reinforced concrete reaches its design strength, removing the support components inside the culvert to restore its drainage function. The aforementioned method for underpinning culvert foundations is applicable to natural foundation underpinning of frame structures. During the underpinning process, the building can be used normally without speed restrictions, which helps reduce the impact of the underpinning on the surrounding area.

This invention discloses a method for maintaining a temporary access road when an elevated trestle bridge passes under an existing railway frame bridge. The existing railway frame bridge is a double-span drainage culvert. The method includes: constructing a traffic culvert on one side of the double-span drainage culvert, while retaining the other side as a drainage culvert; constructing a temporary steel bridge within the traffic culvert to form a construction passage across the bottom slab of the existing frame culvert; connecting the temporary steel bridge with the passages on both sides of the double-span drainage culvert to form a temporary access road; maintaining clearance between the temporary steel bridge and the bottom of the traffic culvert; and spacing between the temporary steel bridge and the two sides of the traffic culvert; the temporary steel bridge is a single-lane bridge with height and width restrictions. This invention enables low-clearance crossing while ensuring smooth drainage during the flood season.

The invention discloses a flow construction method of a modularized intelligent synchronous sliding trolley system for a soft-foundation long linear water conveying tank culvert. The flow construction method comprises the following specific steps that firstly, construction pre-preparation is conducted; 2, a trolley synchronous sliding unit is built; 3, template unit assembling and posture calibration; 4, system rechecking and pre-compensation before pouring; 5, first-time concrete pouring is conducted; sixthly, synchronous sliding construction is conducted; and 7, line production circulation is conducted, specifically, the step 6 is repeated, and concrete pouring and trolley synchronous sliding of all construction sections are completed in sequence. The construction efficiency and precision of the soft foundation long linear water conveying tank culvert are improved, the construction risk is reduced, and good practicability and popularization value are achieved.

This invention relates to the field of solid deformation monitoring technology, specifically to an automated track geometry monitoring system and method. The method includes: determining the deformation significance of each monitoring point at the current acquisition time based on pre-acquired lateral and longitudinal displacements; segmenting the track to be monitored; determining the deformation gradient dispersion rate within each segment based on the deformation significance and the bridge / culvert jacking distance; determining the deformation differences between segments; determining local deformation parameters based on the inter-segment deformation differences and the bridge / culvert jacking distance; thereby performing real-time monitoring of track geometry deviations for each monitored segment to achieve automated track geometry monitoring. This invention, by analyzing the deformation at different monitoring points, achieves real-time monitoring of track geometry deviations in monitored segments and improves the rationality of track geometry deviation monitoring, thus enhancing the overall rationality of track geometry monitoring.

The invention discloses metakaolin modified mortar for in-situ rapid repair and a preparation method of the metakaolin modified mortar, and belongs to the technical field of building materials. The preparation method comprises the following steps: S1, uniformly mixing polyether modified organic silicon hydrophobic powder with fine sand to obtain a premix A; uniformly mixing a composite expanding agent with fine sand to obtain a premix B; uniformly mixing a composite thickening agent with fine sand to obtain a premix C; s2, uniformly mixing sulphoaluminate cement, Portland cement, fly ash, silicon powder, metakaolin and the remaining fine sand, then sequentially adding the premix A, the premix B and the premix C, and mixing for 2-10 minutes after feeding each time to obtain a mixture; and S3, adding a water reducing agent into the mixture, uniformly mixing, and adding water for stirring, thereby obtaining the water-based paint. The mortar prepared by the invention has the advantages of short setting time, good corrosion resistance and impermeability, high strength, no sagging in vertical surface spraying and the like, and has good applicability to in-situ rapid spraying repair of defects in a corrosion environment of the drainage box culvert.