102 results about "Surface construction" patented technology

The invention discloses a building design modeling method and system based on a parameter entity and a Boolean relationship thereof, and the method comprises the steps: converting a plurality of building components into geometric body data based on a structure shape, and abstracting a single geometric body into a whole model according to the Boolean relationship between the building components required by the design; the method specifically comprises the steps that firstly, building design related component data given by a user is preprocessed, a two-stage structure is adopted to redefine a geometry, the geometry is stored, and the Boolean relation between components is represented through a tree structure; the preprocessed data are transmitted into a grid generation solver, and a final three-dimensional model and affiliated topological information are obtained through background grid and contour surface construction, topological information integration and grid post-processing. The method can ensure that the building design modeling process has good robustness and calculation efficiency.

The invention provides a method for compensating influence of net rack deformation on inner profile precision, and belongs to the technical field of wind tunnel body inner profile construction. A minimum dominating set algorithm is adopted to optimize sensor layout to construct a three-dimensional deformation monitoring network, and a pre-arching compensation optimization function is used to calculate a preset elevation compensation value; in the net rack splicing process, splicing errors are corrected in real time through a structural deformation self-adaptive compensation model, displacement synchronization in the lifting process is ensured through a synchronous hydraulic lifting system and a lifting deformation control algorithm, and after a net rack is in place, the actual geometrical shape of an inner molded surface is obtained through a three-dimensional laser scanning technology. According to the deviation value, comprehensive compensation measures of supporting jig frame elevation adjustment, temporary supporting structure arrangement, follow-up construction load distribution control and net rack node position fine adjustment are adopted for deformation compensation, and the technical problem that due to net rack deformation, the geometric accuracy of the inner profile of the lower hanging cast-in-place slab is difficult to control is solved.

The invention discloses a construction method of a composite sandwich thermal insulation building block constructional column, which is characterized by comprising the following steps of: S1, checking and accepting embedded steel bars of the constructional column, and pre-discharging a story number line of brick building blocks according to an elevation control line and the elevations of a windowsill and a window top; s2, typesetting and designing according to the size of the heat bridge part, and popping up a floor axis, a wall body side line and a constructional column side line; s3, the composite sandwich heat preservation building blocks are built to form a wall body; a horse tooth rubbing position at the joint of the constructional column is reserved; s4, supporting a film on the constructional column and pouring; s5, removing the mold and cleaning the site; the characteristic of a three-layer structure of the composite sandwich thermal insulation building block is reasonably utilized, a standard stubble groove body formed by an inner blade and the complete building blocks on the two sides is removed at the constructional column, a standard constructional column is formed through pouring, and the connectivity between the constructional column and walls on the two sides is effectively enhanced; the building block outer side heat preservation layer without the inner blades and the outer blades can also be used as templates to reduce material loss, and the outer surface of the constructional column formed in the mode is flush with a normal building block, so that the continuity of a surface construction layer is not affected.

The utility model discloses a profiling supporting hanging basket, particularly discloses a profiling supporting hanging basket for arc-shaped outer wall surface construction, and belongs to the technical field of design and manufacturing of building engineering construction process devices. According to the profiling supporting hanging basket for arc-shaped outer wall surface construction, the construction safety is remarkably improved, and the functions are relatively complete. The profiling supporting hanging basket comprises a profiling hanging basket body, the profiling supporting hanging basket further comprises a limiting, guiding and stabilizing mechanism and a material grabbing and lifting mechanism, the limiting, guiding and stabilizing mechanism is arranged on the portion, on one side of the inner arc-shaped structure, of the profiling hanging basket body, and the material grabbing and lifting mechanism is arranged on the portion, on one side of the outer arc-shaped structure, of the profiling hanging basket body; in the construction process of the arc-shaped outer wall surface attachment, the profiling hanging basket body is limited and kept stable through the limiting, guiding and stabilizing mechanism, and materials in the construction process are conveyed to the profiling hanging basket body from the ground through the material grabbing and lifting mechanism.

The application discloses a recycled aggregate crushing simulation and optimization method based on a DEM particle crushing algorithm, which is based on the Griffith strength theory and the discrete element method, realizes efficient and accurate simulation of particle crushing behavior through single-particle three-dimensional stress calculation, crushing criterion establishment, fracture surface construction based on a contact point origin and sub-particle attribute inheritance, and forms a method from parameter calibration to dosage quantification; the application quantifies the maximum dosage of recycled aggregate under different highway grades and base types by revealing the mesoscopic mechanism that recycled mortar is similar to natural crushed stone in mechanical properties and recycled bricks have a decisive control on the crushing value of the mixture, and provides a theoretical reference and practical guidance for the resource high-value utilization of building solid waste recycled aggregate in road bases.

The application discloses a kind of medical titanium alloy material surface antibacterial functionalization processing methods, first by hydrothermal oxidation and high-temperature sintering processing in titanium alloy material surface construction TiO2 Nanometer sheet, then deposit W 18 O 49 Quantum dots are deposited on the TiO2 Nanometer sheet, and TiO2 / W 18 O 49 Heterojunction is constructed on the surface of titanium alloy.TiO2 / W 18 O 49 Heterojunction can efficiently catalyze the production of reactive oxygen species (ROS) under near-infrared light irradiation, achieving antibacterial function. The TiO2 / W 18 O 49 Heterojunction functionalized titanium alloy material surface, the irregular sheet structure of TiO2 Nanometer sheet can greatly increase the contact area of the material surface and the surrounding solution, and the W 18 O 49 Quantum dots have the characteristics of "single-atom-like catalysis", which can improve the ROS yield and further endow the medical titanium alloy surface with strong photodynamic antibacterial performance.

The utility model discloses an assembly type wave anode aluminum plate wall surface design structure capable of avoiding echoes, which comprises a base layer framework, long supporting square pipes and short supporting square pipes, a flange is arranged on the opposite side of the inner anodized aluminum plate, an aluminum plate connecting piece is arranged in the middle of the flange, a folded edge is arranged on one side of the aluminum plate connecting piece, and the side end face of the inner anodized aluminum plate abuts against the long supporting square pipe; the square tube is fixedly installed at the end of the long supporting square tube, the square tube is perpendicular to the ground, and aluminum plate fixing and supporting pieces are symmetrically arranged on the two sides of the square tube; the end part of the outer anodic aluminum oxide plate is fixedly arranged on the aluminum plate fixing and supporting piece; the partition keel is fixedly mounted on the back of the base framework, and a gypsum board layer is arranged on the surface of the partition keel. Compared with the prior art, the utility model solves the problems that the modeling is not easy to control, the installation efficiency is low and echoes exist in the construction process of the conventional wave-shaped anode aluminum plate wall surface.

The application discloses a novel anti-cavitation surface structure and a preparation method thereof. The anti-cavitation surface structure can change the wetting degree of a material surface, reduce gas nuclei near a liquid-solid contact surface, inhibit cavitation and cavitation erosion processes, and also reduce the damage of micro-jets to the material in the cavitation erosion process. The anti-cavitation surface structure layer is composed of a surface construction layer and a substrate. The working mechanism is as follows: firstly, the construction can change the wetting degree of the material surface, so that the gas nuclei near the liquid-solid contact surface are reduced, thereby slowing down the cavitation and cavitation erosion processes; secondly, the incident kinetic energy of the micro-jets in the effective construction area is consumed in the form of friction, thereby reducing the damage of the micro-jets to the material substrate. The application can effectively slow down the cavitation erosion process, weaken the influence of the micro-jets on the material substrate in the cavitation erosion process, and effectively resist the damage of the cavitation erosion to the material surface.

The present application relates to the field of data processing technology, and relates to an ecological safety pattern construction system based on a minimum cumulative resistance model, which comprises an ecological data preprocessing and source extraction module, a resistance factor extraction module, a dynamic resistance surface construction module, a cumulative resistance evaluation module, a key ecological element identification module and a safety pattern generation module, and is characterized in that: the ecological source data in a target region is subjected to feature density statistics to obtain an ecological source distribution map; the ecological source distribution map is subjected to inhibition influence analysis to obtain resistance factors; the resistance factors are subjected to spatial data superposition to obtain a dynamic resistance surface; the ecological source distribution map is subjected to spatial diffusion resistance cumulative evaluation to obtain a cumulative resistance surface; the cumulative resistance surface is subjected to key ecological element analysis to obtain ecological corridors and ecological nodes; and the ecological safety pattern of the target region is constructed according to the ecological corridors and the ecological nodes; and the present application can improve the efficiency of the ecological safety pattern construction based on the minimum cumulative resistance model.

The utility model relates to wall surface construction tool technical field, and more specifically, relate to a kind of scaffold for house construction, comprising: underframe, it is equipped with at least X mounting surface, and at least Y mounting surface is equipped with sliding slot, X is integer greater than or equal to 4, Y is integer greater than or equal to 3, and X-Y is greater than or equal to 1;Several support leg assemblies, the number is equal to the number of sliding slot, respectively slidably set at each sliding slot, the support leg assembly is used to improve the support stability of the underframe;Multiple side frames, the number is equal to the number of mounting surface of the underframe, respectively detachably set on each mounting surface of the underframe;Connecting frame, set on the upper side of each side frame;Safety frame, set on the upper side of the connecting frame.The scaffold for house construction of the utility model aims at solving the problem that the scaffold cannot keep stability in prior art under the premise of close to wall surface.

This invention relates to a method for three-dimensional pose and visual measurement of building components based on planar markers, including a floor, building components, several planar markers, and a binocular camera system; the patterns of the planar markers include calibration plate patterns and numbering patterns, enabling automatic data classification after the planar markers are captured; the process for capturing planar markers is defined; a theoretical world coordinate system is established based on coordinate system transformation, avoiding the problems of overall coordinate system translation deviation, three-axis rotation deviation, and error accumulation caused by traditional methods; the coordinate system transformation unifies all camera coordinate systems to the theoretical world coordinate system, enabling coordinate stitching of large-sized components by small-format cameras.

The application relates to a fabricated building wall surface structure and a construction method, and belongs to the technical field of wall surface construction. The structure comprises a plurality of wall surface units fixedly installed on a prefabricated wall body, a plurality of fixing members and a plurality of embedded members installed in the prefabricated wall body. The number of the embedded members corresponds to the number of the fixing members. Each wall surface unit comprises an installation plate and a wall plate. One side of the installation plate is connected with the prefabricated wall body. Side limiting edges are arranged at the edges of the side of the installation plate away from the prefabricated wall body. The wall plate is installed in the installation plate. The side limiting edges abut against the side edges of the wall plate. The fixing member comprises a connecting part and a pressing part which are fixedly connected. The connecting part is connected with the embedded member in a threaded cooperation mode. The pressing part is used for pressing the wall plate on the installation plate. The application has the effect of improving the safety of the peripheral environment when the wall plate is replaced.

The utility model provides a wall construction supporting device which comprises a fixing plate, a supporting plate is movably installed at one end of the fixing plate, a fixing groove is formed in the fixing plate, a fixing block is rotatably installed in the fixing groove and installed in the fixing groove through a rotating column, one end of the fixing block is fixed to the supporting plate, and the other end of the fixing block is fixed to the supporting plate. Cavities are formed in the fixing plate and the supporting plate, fixing rods and supporting rods are movably installed in the cavities correspondingly, limiting rods are welded to one ends of the fixing rods and one ends of the supporting rods correspondingly, and ring bases are fixed to one sides of the fixing plate and the supporting plate correspondingly. When the wall surface construction supporting device is used, the fixing plate and the supporting plate are connected and installed in a 90-degree mode, the fixing plate and the supporting plate are matched to support a single-face wall surface, in addition, one side of the fixing plate and one side of the supporting plate rotate at the same time to make contact with the ground, and after the fixing plate and the supporting plate are in a triangle shape and make contact with the ground, double-face supporting is conducted on the right-angle wall surface.

The utility model provides a wall-attached connection additional frame for a special-shaped wall surface construction elevator, and relates to the technical field of building construction, the wall-attached connection additional frame for the special-shaped wall surface construction elevator comprises a first mounting plate and a second mounting plate, the first mounting plate is used for being mounted on a wall surface, the second mounting plate is used for being mounted on the wall surface, and the second mounting plate is used for being mounted on the wall surface; the position of the second mounting plate is adjusted through the connecting supporting part, the second mounting plate is adjusted to the wall face of the sunken position, the driving part drives the connecting supporting part to conduct length adjustment, the position of the second mounting plate is adjusted according to the depth of the wall face of the sunken position, and the second mounting plate is mounted on the wall face of the sunken position after adjustment is completed. And the connecting supporting part and the first mounting plate are fixed through the fixing part, so that the problem that the wall attaching connecting frame cannot be connected with the special-shaped wall surface can be effectively solved, the plane arrangement of the construction elevator does not need to be adjusted, the material mechanical transportation cost can be reduced, and the engineering construction efficiency is effectively improved.

The utility model relates to the technical field of research and development of small-sized paving equipment for excellent surface construction, and discloses corner paving equipment for excellent surface construction, which comprises a trolley, a fixing frame is fixedly connected to the top of the trolley, a storage tank is fixedly connected in the fixing frame, a stirring mechanism is arranged in the storage tank, and the stirring mechanism is arranged in the storage tank. A paving box is fixedly connected to the top of the trolley, an inclined plate is fixedly connected to the interior of the paving box, a discharging groove is formed in the bottom of the paving box, an adjusting mechanism is arranged in the paving box, mop cloth is fixedly connected to the bottom of the paving box, and a discharging pipe is fixedly connected to the bottom of the storage tank. And a chute is fixedly connected between the fixing frame and the paving box. According to the utility model, the integrated stirring and anti-sticking assembly is adopted, and the stirring rod is driven by the motor to link with the scraper, so that a mixture is prevented from adhering to the tank wall, uniform stirring is ensured, and the problem of material blockage is effectively avoided. Compared with a traditional single stirring structure, the stirring efficiency is higher, and maintenance is less.

The application discloses a kind of infinite die workpiece robot machining program automatic generation method in the field of intelligent manufacturing, comprising the following steps: step 1, obtain blank point cloud;Step 2, point cloud normal vector and Gaussian curvature calculation;Step 3, all point clouds are classified, generate construction point 1, obtain sub-region boundary line and sub-region clustering center point, then second clustering is carried out, and the boundary line clustering center point is obtained again;Step 4, generate construction point 3, generate surface construction key point using key point generation algorithm;Step 5, establish auxiliary plane point cloud, generate auxiliary plane based on sub-region clustering center point, boundary line clustering center point and surface construction key point;Step 6, generate initial path point, find the intersection of original point cloud and auxiliary plane point cloud, generate initial path point;Step 7, post-processing;Realize the generation of polishing and cleaning program not dependent on numerical model.

The invention discloses a tunnel back break intelligent detection method based on a three-dimensional laser scanning technology, and relates to the field of tunnel engineering construction. The method comprises the following steps: inputting a tunnel three-dimensional laser scanning point cloud data set collected on site, automatically carrying out fine-grained processing and training learning by an algorithm, automatically extracting data features, obtaining classification model parameters, taking the classification model parameters as fixed values of a machine learning algorithm model, segmenting each three-dimensional point cloud model into point cloud pieces, comparing point cloud label information, and carrying out machine learning. And field point clouds with the same characteristics are merged, manifold is introduced as a constraint condition, and a tunnel section over-excavation and under-excavation three-dimensional laser scanning model is reconstructed by means of a curved surface construction method. According to the method, massive point cloud data is intelligently processed, so that the constructed tunnel curved surface integrally meets Euclidean spatial characteristics, the local characteristics of the tunnel section model are guaranteed, the real spatial form of the tunnel is more accurately reflected, accurate judgment of over-excavation and under-excavation in the tunnel section construction process is realized, and a powerful technical support is provided for safe construction of the tunnel.

To accurately estimate design site vibration used for design of a building by appropriately generating a tomographic model corresponding to assumed earthquake motion when a plurality of uncertain hypocenter characteristics are included.SOLUTION: The earthquake motion estimation system for design 1 includes a tomographic model generation unit 3 that generates a plurality of tomographic models in which different values are set from values that can be taken by each of a plurality of uncertainty hypocenter characteristics, an earthquake motion evaluation unit 4 that evaluates earthquake motion for each of the plurality of tomographic models, a response surface construction unit 5 that constructs a response surface in which each of the plurality of uncertainty hypocenter characteristics is an explanatory variable and an evaluation result of earthquake motion is an objective variable, an uncertainty hypocenter characteristic value extraction unit 7 that searches for and extracts a combination in which a difference between a value of the objective variable and a value designated from the outside is within a threshold value by grid search, and an earthquake motion estimation unit for design 8 that estimates earthquake motion for design using the tomographic model for design.SELECTED DRAWING: Figure 1

The invention relates to the technical field of hanging basket equipment, in particular to a hanging basket limiting cableway device which comprises a hanging basket support system, upper limiting square steel, a hanging basket, cableway steel wire ropes, lower limiting square steel and lower limiting square steel anchoring nodes. The upper limiting square steel is arranged on an upper floor of the outer vertical face of the broken line wall, and a fixed pulley is welded to the end of the upper limiting square steel. The lower limiting square steel is arranged on the lower floor of the outer vertical face of the broken line wall, and when the lower limiting square steel is located on the skirt house floor or the ground, the lower limiting square steel anchoring joints are adopted. According to the hanging basket limiting cableway device, the problem of adaptation of broken line surface construction is thoroughly solved, and the technical blank of the industry is filled up. The stable operation of the hanging basket along a set broken line track is realized for the first time through a limiting rail system formed by the upper limiting square steel, the lower limiting square steel or the anchoring node and the cableway steel wire rope in cooperation with a sliding connection structure of the fixed pulley and the hanging basket body.

This invention discloses a structure and method for medium-deep geothermal extraction, relating to the field of geothermal extraction technology. It includes an injection well, a production well, and a heat exchange well located in the same site. Both the injection and production wells comprise a first vertical section, a first inclined section, a first inclined section, a second inclined section, and a second vertical section, sequentially arranged from the surface into the depth of the strata. The heat exchange well includes a vertical section, an inclined section, a first horizontal well branch, and a second horizontal well branch. The vertical section extends from the surface into the depth of the strata. The inclined section is located at the bottom of the heat exchange well. The first ends of both the first and second horizontal well branches are connected to the inclined section. The first horizontal well branch is connected to the second vertical section of the injection well, and the second end of the second horizontal well branch is connected to the second vertical section of the production well. The inclined section can be sealed. This invention enables heat exchange without water extraction, requires less surface construction space, and has high applicability.

The application discloses a lunar soil screening-static electricity conveying load device and method for lunar surface construction, mainly comprising a load frame, a first-stage vibrating screen structure, a second-stage dispersion structure, a static electricity conveying structure and a power module, and realizes in-situ screening, conveying and waste dumping integration operation of lunar soil particle raw materials; the first-stage vibrating screen structure obtains the lunar soil particle raw materials meeting the particle size requirement through the vibrating screen mode, stores the screened particles in the second-stage dispersion structure, and dumps the waste out of the device; a certain amount of particles are stored in the second-stage dispersion structure to ensure the printing continuity within a certain time, and the bottom screen mesh can ensure that the agglomerated lunar soil powder is dispersed into the static electricity conveying structure; the static electricity conveying structure controls the lunar soil particles to realize directional movement through the static electricity field, and has a certain initial speed at the outlet end of the static electricity conveying structure, so that the low lunar gravity suspension problem of the lunar soil is overcome, and the lunar soil accurately reaches the conveying target.

The utility model provides an expressway slope reinforcing structure, which belongs to the technical field of expressway slope protection and comprises a plurality of ecological blankets sequentially laid on a slope. Pressing and holding assemblies are arranged between the adjacent ecological blankets and press the ecological blankets on the surface of the slope. The adjacent pressing assemblies are connected through a connecting assembly; a plurality of steps facilitating up-down walking are arranged on the pressing assembly in the slope direction. According to the utility model, the ecological blanket is fixed on the slope surface through the hold-down assembly, and the slope surface construction can be realized through the steps on the hold-down assembly, so that the danger of directly standing on the slope surface for construction is reduced.

The utility model relates to the technical field of grooving devices, and discloses a wall surface grooving device for indoor construction, which comprises a cart, the top of the cart is fixedly connected with a support plate, the front side of the support plate is fixedly connected with a fixing mechanism, the top of the cart is fixedly connected with a dust collection mechanism, the fixing mechanism comprises a sliding assembly, and the sliding assembly is fixedly connected with the support plate. The sliding assembly is fixedly connected with a supporting L-shaped plate, the top of the supporting L-shaped plate is fixedly connected with an air cylinder, the front side of the supporting L-shaped plate is fixedly connected with an auxiliary rotating assembly, the output end of the air cylinder is fixedly connected with a driving plate, and the two sides of the auxiliary rotating assembly are fixedly connected with two side supporting blocks. And rotating plates are rotationally connected to the interiors of the two sides of the supporting blocks on the two sides. According to the grooving device, when the grooving device is used for wall construction, the position of the grooving device deviates due to vibration and external force, the fixing mechanism can ensure that the grooving device is stable and immovable in the whole construction process, and therefore construction errors are reduced, and grooving quality is guaranteed.

The present application relates to the field of oil and gas field development reservoir reconstruction, disclose a kind of interlayer temporary plugging steering construction method and device, the method comprises: according to the stress of each perforation cluster calculated by well logging data;Calculate the temporary plugging pressure after temporary plugging agent enters the perforation hole;According to the temporary plugging efficiency calculated by the temporary plugging pressure and the stress of each perforation cluster;According to the temporary plugging efficiency, determine whether to continue temporary plugging steering construction.The present application is by observing the change of surface construction pressure in steering stage, combined with the minimum horizontal principal stress value of perforation cluster, the specific perforation cluster number of temporary plugging is characterized, the steering effect is no longer simply judged as success or failure, but the temporary plugging efficiency is calculated, the quantitative characterization of steering effect is realized.The analysis method of the present application has high reliability and effectiveness compared with conventional direct evaluation method, can realize real-time, quantitative evaluation of steering effect, can also be used to guide field steering construction, operation time is short, reduces construction risk.

The utility model relates to a flange butt joint structure and an elevator shaft, the flange butt joint structure comprises two H-shaped steel columns, flanges are connected to the ends of the H-shaped steel columns, a plurality of connecting holes allowing connecting pieces to penetrate through are formed in the flanges, and the flanges of the two H-shaped steel columns are in butt joint and fixedly connected through the connecting pieces; wherein the H-shaped steel column is provided with a web plate, the multiple connecting holes are distributed in the two sides of the web plate, the web plate is provided with an operation hole penetrating through the two sides of the web plate, one side of the web plate is configured to be a working face, and a constructor can install the connecting piece on the working face through the operation hole. According to the flange butt joint structure and the elevator shaft, multi-working-face construction can be omitted by arranging the operation holes, constructors can conveniently conduct construction operation, the construction efficiency is improved, and the labor cost and the material cost can be saved.

The utility model discloses a device for dismantling an ultrahigh steel truss gable wall. The device comprises a main purline of an existing structure located above a steel truss gable wall, and further comprises a hanging basket, a top guide device, a winch and a bottom guide pulley, the hanging basket is connected with the main purline of the existing structure through a steel wire rope and suspended below the main purline of the existing structure, and the top guide device comprises two fixed pulleys suspended below the main purline of the existing structure. The two fixed pulleys are arranged at a certain interval and connected with a main purline of an existing structure through steel wire ropes, the winch and the bottom guide pulley are fixed to the ground on the side face of a gable wall of the steel truss, one end of the steel wire rope of the winch is connected with the winch, and the other end of the steel wire rope is a dismantling piece binding end. And the binding end of the dismantling piece sequentially bypasses the bottom guide pulley and the two fixed pulleys of the top guide device and then hangs down. The device is simple in structure, convenient to operate and low in construction safety risk, use of a large crane is avoided, multi-working-face construction can be achieved, and the construction progress can be accelerated.

The invention discloses large-width stone wall surface dry hanging equipment, and belongs to the technical field of wall surface construction. Comprising a suction plate, a suction cup, a side face fixedly arranged on the suction plate, an air suction cylinder fixedly arranged on the side face, opposite to the suction cup, of the suction plate, and an air suction column slidably arranged in the air pressure cavity, the end of the air exhaust column extends out of the air exhaust barrel through the side, away from the suction plate, of the air pressure cavity. The stone can be synchronously driven to move by changing the position of the suction plate through the adjusting structure, and compared with a conventional direct stone carrying mode, the stone moving stability can be improved easily.

A building engineering wall surface construction auxiliary device comprises a working platform, a rotating baffle, a vertical magnetic sheet, a lower supporting frame plate, supporting rods, a first reinforcing rod, a second reinforcing rod, a climbing rod, a limiting sliding rod, an air cylinder and moving wheels, the lower portions of the supporting rods are connected with the lower supporting frame plate, and the four supporting rods are distributed at the four corners of the lower supporting frame plate; the two ends of the first reinforcing rods are connected with the symmetrical supporting rods, the set of first reinforcing rods are distributed on the upper portion of the lower supporting frame plate, the two ends of the second reinforcing rods are connected with the symmetrical supporting rods, the lower portion of the lower supporting frame plate is connected with the moving wheels, the four moving wheels are distributed at the bottom of the lower supporting frame plate, the sliding guardrail is provided with sliding guardrail lantern rings, and the supporting rods are matched with the sliding guardrail lantern rings. The supporting rods are inserted into the sliding guardrail lantern rings and slide in the sliding guardrail lantern rings.

The application discloses a shallow-buried tunnel arch upper open and arch lower excavation construction method and relates to the technical field of tunnel construction. The method comprises the following steps: S1, leveling a roof gutter and excavating a side slope; S2, excavating an arch part by an open excavation method; S3, constructing an arch part support; S4, backfilling an upper arch; S5, excavating by three steps and a temporary inverted arch; S6, secondary lining; and S7, laying a waterproof layer. The shallow-buried tunnel arch upper open and arch lower excavation construction method effectively controls surface subsidence in shallow-buried underpass tunnel construction, protects ground buildings, avoids the influence of tunnel construction on the ground buildings, avoids the result of demolishing the ground buildings, greatly saves construction time, thereby saving cost, the secondary lining structure of the tunnel is rationally designed, the construction method is simple, and the construction quality is easy to control, so that construction cost can be greatly reduced, construction period is saved, construction safety can be ensured, and good social benefits are achieved.

The utility model relates to nail shooting bullet technology field especially, a kind of double-base propellant nail shooting structure.Its technical scheme includes: nail rod and shell seat, the top of nail rod is fixedly connected with nail base, the top of nail base is equipped with threaded hole, the bottom of shell seat is connected with threaded column, and threaded column is matched with threaded hole, the inside of shell seat is provided with charge assembly, the periphery bottom of nail rod is equipped with auxiliary positioning assembly.The utility model not only can avoid nail inclination, skidding or deviation when smooth or hard surface construction, significantly improve nail vertical precision and anti-deflection ability, but also can be through the pre-embedding of reinforcing nail and the collaborative stability of annular support part, substantially enhance single firing success rate and anchoring reliability.