182results about How to "Simplify the construction process" patented technology

The invention provides a tunnel hard rock non-blasting excavation method. The tunnel hard rock non-blasting excavation method can realize efficient excavation of complete or relatively complete hard rock without adopting large excavation equipment such as a heading machine and the like , and is characterized by comprising the following steps of 1, drilling contour holes along a tunnel face contour line so as to determine a tunnel excavation range, and determining each drilling and grooving position according to the excavation range, then, forming and drilling a plurality of cavity expanding holes in the position close to the positions; 2, drilling a plurality of rows of guide holes between the contour holes and the cavity expanding holes; 3, drilling groove forming holes which are meshed and overlapped with each other at the determined drilling and grooving positions, and finally forming a groove cavity; 4, enabling the cavity expanding holes near the groove cavity to be subjected to impact crushing, and therefore expanding excavation is conducted on the groove cavity; 5, according to a certain excavation sequence, starting from the guide holes close to the expanded and excavated groove cavity, adopting a hydraulic breaking hammer for conducting impact breaking on the guide holes, so that excavation of the rock mass of a main body part is completed; and 6, conducting impact crushing on the contour holes.

The invention relates to the field of mobile data communication services, in particular to a subway rail transit underground space emergency communication system and an arrangement method thereof. The subway rail transit underground space emergency communication system provided by the invention comprises a first communication link used for transmitting service data in a first state; the second communication link is used for transmitting service data in a second state; the communication link monitoring module is in signal connection with the first communication link and is used for monitoring the signal-to-noise ratio of data transmission in the first communication link; and the communication link switching module is in signal connection with the communication link monitoring module, is respectively in signal connection with the first communication link and the second communication link, and is used for switching the data transmission path from the first communication link to the second communication link according to the signal-to-noise ratio of data transmission in the first communication link. According to the invention, through double-link redundancy and rapid switching, automatic switching to a standby link is realized under abnormal conditions such as optical fiber faults or power interruption, and continuous and uninterrupted communication is ensured.

The invention relates to a tunnel secondary lining concrete filling state real-time monitoring system which is characterized in that a secondary lining cavity is defined by a secondary lining template in a tunnel, the system comprises a sensor array located in the secondary lining cavity, the sensor array comprises a plurality of rows of optoelectronic switches distributed in the extending direction of the tunnel, and the optoelectronic switches in the same row are distributed in the circumferential direction of the tunnel; the signal processing and acquisition unit is responsible for supplying power to the photoelectric switch and converting the received signal of the photoelectric switch into a signal displayed by a display; and the data processing and displaying unit is responsible for displaying the signals transmitted by the signal processing and collecting unit on a reality device. The invention aims to provide the tunnel secondary lining concrete filling state real-time monitoring system capable of acquiring the cavity in real time, and the problem that the existing cavity can only be acquired afterwards is solved.

The utility model relates to bridge engineering technical field especially a kind of deck structure of suspension chain plate arch bridge and pedestrian suspension chain plate arch bridge, including multiple bridge deck panels and multiple cables, multiple cables are mutually parallel between the, the both ends of cable are anchored on the mountain on both sides respectively, cable body is taut to exert pretension;Multiple bridge deck panels are fixed above cable along cable, multiple bridge deck panels are connected to form an integral whole, single bridge deck panel is fixedly connected with multiple cables simultaneously.Multiple bridge deck panels are erected on cable, to avoid the instability of suspension chain plate arch bridge caused by setting suspension structure;Cable body is taut and exerts pretension and multiple bridge deck panels are connected to form an integral whole, improve the overall rigidity of deck, further improve the ability of suspension chain plate arch bridge to resist lateral load, improve stability, effectively reduce safety risk.

The invention relates to a construction device and method for construction of unequal-height beam webs through equal-height beam side formworks, and belongs to the technical field of building beam construction.The device comprises a vertical rod with an adjustable bearing, a beam bottom height adjustable early-dismantling jacking, a beam bottom rib, a beam bottom formwork, double joists and the beam side formworks, and the double joists are installed on the vertical rod with the adjustable bearing; the positions of the double joists can be adjusted by adjusting the adjustable bearing vertical rods, the beam side molds are installed on the double joists, the beam bottom height adjustable early-dismantling jacking supports are installed on the double joists, the beam bottom rib and the beam bottom mold are installed on the beam bottom height adjustable early-dismantling jacking supports, and the beam bottom rib and the beam bottom mold are located between the beam side molds. The positions of the beam bottom rib and the beam bottom die can be adjusted by adjusting the beam bottom height-adjustable early-dismantling jacking, and construction of unequal-height beam webs is achieved. According to the construction method, beam side formworks of the same specification can be used for construction of beam webs of different heights, the specifications and models of the beam side formworks can be reduced, the management and storage cost of the formworks can be reduced, and the turnover utilization rate and the construction efficiency of the formworks can be improved.

A kind of oilfield polymer injection concentric three-channel oil pipe, it includes: coaxially nested three-layer pipe body: outer tube is set in the middle layer pipe of outer tube, and center tube is set in the middle layer pipe;Three independent channels: the first channel is formed by the inner cavity of the center tube, the annular space between the center tube and middle layer pipe forms the second channel, the annular space between the middle layer pipe and outer tube forms the third channel;Channel bridge assembly: be provided with at pipe body both ends, including upper annular channel bridge and lower annular channel bridge;The channel bridge assembly is provided with axial through hole and radial opening respectively connecting first channel, second channel, third channel;Dismountable sealing connection structure: the utility model novel structure, through the unique three-channel design, three different oil layers can be simultaneously carried out three-layer quality boosting injection polymer, improve the pertinence and effectiveness of polymer injection liquid, and then improve oil recovery.

The utility model relates to the technical field of building construction, in particular to a node coating structure of an inner wall and a steel column, which comprises the steel column and the inner wall, a positioning column is mounted on the surface of the steel column, at least one buffer piece is mounted on the surface of the inner wall, and the positioning column is matched with the buffer piece to connect the steel column with the inner wall. The surfaces of the steel columns and the inner wall are covered with mortar layers, the surfaces of the steel columns are provided with mortar leveling layers, the surfaces of the mortar leveling layers are covered with galvanized steel wire meshes, the surfaces of the galvanized steel wire meshes are covered with glass fiber gridding cloth, and the glass fiber gridding cloth extends towards the surface of the inner wall until the glass fiber gridding cloth completely covers the surfaces of the inner wall and the steel columns and is pressed by mortar; positioning columns are arranged on the surfaces of steel columns and matched with buffer pieces of an inner wall to form flexible connection, small displacement is allowed to absorb dynamic loads, mounting bases of the buffer pieces are modularly mounted through fixing grooves and corrugated stainless steel mesh belt mounting grooves, and corrugated stainless steel mesh belts elastically adapt to structural deformation by means of adjustable design of mounting blocks; and the cracking risk is further reduced.

The application discloses a shear connector, a steel-concrete composite beam containing the shear connector and a construction method of the steel-concrete composite beam. The shear connector comprises an inverted truncated cone type cylinder (7), a stiffener, a cover plate, a penetrating steel bar (8) and a high-strength bolt (21); the stiffener comprises an integrally formed stiffener bottom plate (13) and a stiffener side plate (14), the size of the stiffener bottom plate is consistent with the size of the lower opening of the cylinder, and the stiffener bottom plate is attached to the lower opening of the cylinder; the stiffener bottom plate is provided with a second connecting hole for connecting the high-strength bolt; the stiffener side plate is arranged around the stiffener bottom plate and is attached to the inner wall of the cylinder; the height of the stiffener side plate is lower than that of the first connecting hole; the cover plate covers the upper opening of the cylinder; the penetrating steel bar transversely passes through the cylinder through the first connecting hole and leaves a connecting section on each side of the cylinder; and the high-strength bolt connects the stiffener bottom plate through the second connecting hole. The application realizes the disassembly and replacement of each component of the shear connector and the prefabricated bridge deck; and the structure form and stress performance of the shear connector are optimized.

The utility model relates to the technical field of metal roofs, in particular to a composite metal roof structure which comprises a plurality of metal plates, adjacent metal plates are in lap joint through a first vertical lockrand and a second vertical lockrand, and the first vertical lockrand, a support and the second vertical lockrand are welded and fixed. A waterproof coiled material is arranged on the upper surface of the metal plate in a composite mode, the first edge and the first vertical lockrand are arranged in a separated mode and extend out of the upper edge of the first vertical lockrand, the second edge extends to the lower edge of the second vertical lockrand, and the first edge wraps the first lockrand and the second lockrand and is fixed to the second edge in a hot melting welding mode. The metal plates are welded and fixed, so that the wind resistance of the metal roof structure can be effectively improved; the waterproof coiled material is compounded to the upper surface of the metal plate, and the waterproof coiled material is arranged in a wrapping manner, so that the waterproof performance of the composite metal roof structure is effectively improved, and the safety and durability of the whole structure of the metal composite metal roof are improved.

The utility model provides a kind of formwork for station internal stand column diameter expansion construction, including steel hoop assembly and wooden formwork assembly;The wooden formwork assembly includes two semicircular templates, and two semicircular templates are formed into a whole circle by surrounding and splicing;The template includes melamine board layer, plywood layer, support batten layer and assembled batten layer from inside to outside in turn;The melamine board layer and plywood layer are fixed by adhesive method, for making the template inner surface even;The support batten layer is arranged around the outer periphery of the plywood layer by adhesive method, for whole circle support;The assembled batten layer is wrapped outside support batten layer for constraining the overall shape of the template;The steel hoop assembly includes a pair of semicircular steel hoops arranged in pairs, a pair of semicircular steel hoops are used for locking outside wooden formwork assembly, and each steel hoop assembly is arranged equidistantly along the length direction of wooden formwork assembly.The template has the advantages of improving construction efficiency and ensuring the appearance quality after stand column diameter expansion.

This invention proposes a pre-embedded unloading pull ring structure at the connection node between a cast-in-place beam and a cantilever slab. The structure includes a beam body, with a cantilever slab body extending from the bottom of the beam body. A pull ring body is located at the bottom of the beam body, with one end embedded within the beam body and the other end protruding from the connection node between the beam body and the cantilever slab body. By pre-embedding the pull ring body at the bottom of the beam body and having one end protrude from the connection node, this invention eliminates the need for pre-drilling openings in the cantilever slab body. This ensures that the subsequently connected steel wire rope is in a straight line, optimizing the stress distribution between the steel wire rope and the structural beam, reducing the risk of structural damage. Simultaneously, it avoids conflicts, wear, and pressure damage to the cantilever slab caused by inaccurate opening locations, eliminates the risk of leakage due to openings, improves the safety, durability, and waterproofing performance of the cantilever slab, simplifies construction steps, and increases construction efficiency.

This invention discloses a low surface energy active-passive synergistic antifouling coating and its preparation method, belonging to the field of marine antifouling materials technology. The preparation method of the antifouling coating includes the following steps: S1, mixing acetone and xylene and stirring under a nitrogen atmosphere to form a mixed solvent; S2, adding vinyl-terminated silicone resin and acrylic resin to the mixed solvent, stirring and heating to obtain a coating base liquid; S3, adding an initiator to the coating base liquid and continuously stirring and heating to react; S4, after the reaction is complete and the coating base liquid cools, adding functional fillers to form a coating liquid; S5, coating the coating liquid and drying to obtain a low surface energy active-passive synergistic antifouling coating. The low surface energy active-passive synergistic antifouling coating prepared by this invention solves the problem in existing marine antifouling technologies where the single antifouling mechanism prevents the simultaneous consideration of environmental friendliness and long-term effectiveness, and has broad application prospects in the field of marine antifouling materials technology.

The utility model discloses an asymmetric non -middle wall connected arch tunnel support system relates to tunnel support technical field, including connected arch tunnel first -pass hole initial support, connected arch tunnel first -pass hole initial support includes I20a type steel arch frame, inside phi 8 steel bar net, outside phi 8 steel bar net, steel arch frame connecting reinforcing steel bar, big arch foot reinforcing cage, big arch foot steel arch frame triangle bracing structure, big arch foot steel arch frame connecting steel sheet and stiffened steel plate, through the first -pass hole initial support of setting, first -pass hole initial support adopts I20a type steel arch frame, inside phi 8 steel bar net, outside phi 8 steel bar net, steel arch frame connecting reinforcing steel bar, big arch foot reinforcing cage, big arch foot steel arch frame triangle bracing structure, connecting steel plate and stiffened steel plate, form high -strength, high rigid support system, effectively disperses the surrounding rock pressure, reduces local damage, and system anchor rod and radial injection grouting small catheter consolidate surrounding rock through injection grouting, further enhances the stability of surrounding rock.

The application discloses a tunnel plug construction method and a tunnel plug structure, and the method comprises the following steps: S1, drilling holes along the circumferential direction of the inner wall of the tunnel in the plug area to form grouting holes, and grouting the grouting holes; S2, roughening the inner wall of the tunnel in the plug area; S3, installing an exhaust part, a grouting pipeline and a water stop part on the inner wall of the tunnel, the exhaust part is attached to the inner wall of the tunnel and forms an exhaust passage; S4, pouring concrete in the plug area to form a concrete plug block, the concrete plug block gradually cools and shrinks inward; and S5, grouting the joint between the concrete plug block and the inner wall of the tunnel by using the grouting pipeline. The inherent characteristics of the cooling and shrinkage of the concrete plug block are utilized, so that when the plug block shrinks, the exhaust part is driven to naturally separate from at least one side of the inner wall of the tunnel to form an air passage gap, and the air in the joint during the grouting process can be introduced into the exhaust passage in a directional manner through the air passage gap and smoothly discharged.

This invention discloses a dynamic adaptive ecological slope protection system and method suitable for reservoir bank drawdown zone slopes, belonging to the field of water conservancy engineering and ecological restoration. The system includes an anchoring system, a lifting vegetation trough, an integrated water collection system, and a linked water supply device. The anchoring system uses self-weight triggered self-locking anchors to achieve locking upon installation. The vegetation trough can freely rise and fall along the anchors with the water level, and contains a soil layer and a water-storing sponge layer. The water collection system automatically controls water flow through a float valve, and the linked water supply device relies on elastic expansion and capillary action to achieve water storage during submersion and automatic water supply during emergence. Construction adopts a bottom-up modular installation, using the floating plate of the vegetation trough as a working platform, eliminating the need for high-altitude facilities. This invention can adapt to the off-season hydrological rhythm of the drawdown zone, improving slope stability and vegetation survival rate. It requires no external energy or human intervention and has advantages such as convenient construction, low operation and maintenance costs, and eco-friendliness, making it suitable for ecological protection of reservoir and lake drawdown zone slopes.

The application discloses a loose sandstone oil reservoir intelligent layered polymer injection pipe column and a construction method, the polymer injection pipe column comprises at least two layered polymer injection units connected through oil pipes, the layered polymer injection unit comprises a layered packer and an intelligent adjusting injection device, the intelligent adjusting injection device is arranged below the layered packer, and the intelligent adjusting injection device is internally provided with anti-adsorption gravel; at least two levels of intelligent adjusting injection devices are arranged in one layered polymer injection unit, and the filling coefficients of the anti-adsorption gravels in each level of intelligent adjusting injection devices are different. The application discloses the idea of abandoning the polymer flow regulation of the current throttling unit, and innovatively adopts the pre-filling technology with different filling coefficients to regulate the flow, so that the viscosity retention rate is not affected by the machining precision, and the viscosity retention rate is relatively high.

The invention provides a gas-water interface monitoring method, device and equipment in a salt cavern energy storage project, and the method integrates a resistivity detection module, an audio density detection module and a magnetic positioning detection module into a single underground unit, does not need a central tubular column, and can synchronously collect three parameters only through one-time well descending. The depth reference of the casing shoe is accurately determined through magnetic positioning, the position of the gas-water interface is comprehensively calculated through complementary verification of two-parameter sudden change points of resistivity and density, and the measurement error of a single method is effectively eliminated. According to the method and the corresponding device and equipment, high-precision positioning of the gas-water interface is achieved, the monitoring efficiency is remarkably improved, the operation complexity and cost are greatly reduced, and reliable technical support is provided for safe and efficient operation of gas sealing of a salt cavern energy storage project.

The utility model discloses a reinforcing steel bar positioning structure for slope protection engineering, which comprises a soil slope and a fixing mechanism, the fixing mechanism comprises a transverse reinforcing steel bar, the surface of the transverse reinforcing steel bar is movably connected with a plurality of vertical reinforcing steel bars, and the crossed positions of the transverse reinforcing steel bar and the vertical reinforcing steel bars are fixed through binding iron wires. The front faces of the transverse steel bars are movably connected with a plurality of downwards-inserted steel bars, the bottom ends of the downwards-inserted steel bars are inserted into the soil slope, and a positioning mechanism is arranged at the top of the soil slope. In the practical application process of the reinforcing steel bar positioning device, the reinforcing steel bar positioning stability is greatly improved through the synergistic effect of the fixing mechanism and the positioning mechanism. In slope protection engineering, slope topography often leads to easy slippage of steel bars, and parts such as downward insertion steel bars and fixed steel bars in the fixing mechanism and the positioning mechanism are matched with each other, so that the steel bars can be inserted into a soil slope, the whole structure is kept on the surface of the slope, the adjustment work caused by slippage of the steel bars is reduced, and the construction efficiency is greatly improved.

This invention discloses a rapidly connectable seismic-resistant prefabricated shear wall structure and method, relating to the field of prefabricated component connection structures. The structure includes a first shear wall and a second shear wall spaced apart, forming a vertical joint between the two walls, and pre-embedded reinforcing bars are provided. By using first and second connectors welded to the pre-embedded reinforcing bars, and by having the vertical reinforcing bars pass through these connectors, the construction process is simplified, eliminating the need for extensive steel bar binding or the use of custom components, thus reducing connection difficulty and cost. Furthermore, the adjustable first and second connectors allow for a certain range of positional deviation, ensuring the accuracy and flexibility of the connection, thereby improving the overall integrity and seismic performance of the structure.

The application relates to the technical field of bridge assembling, and discloses a guiding assembling device and a guiding assembling method for an assembled bridge. The device respectively comprises a pier column and a prefabricated bent cap, a plurality of guiding devices are arranged in the prefabricated bent cap, a positioning block is connected to the position corresponding to each guiding device in the pier column, a magnetic attraction groove with an open top end is arranged in the positioning block, a guide gap in communication with the magnetic attraction groove is arranged in the upper portion of the positioning block, the guiding device comprises a shell, a guide column is fixedly arranged at the bottom of the shell, a pressure sensor is fixedly arranged at the bottom end of the guide column, the pressure sensor protrudes from the bottom surface of the guide column, and a camera is fixedly arranged at the bottom surface axis position of the guide column. The prefabricated component can be accurately positioned at an accurate position during hoisting through the guiding device, the positioning block and the magnetic attraction groove, the difficulty that the prefabricated component is not easy to operate and difficult to position during hoisting is overcome, the construction process can be simplified, and the construction efficiency is improved.

The municipal water supply and drainage pipeline connector comprises a left connecting part, a right connecting part and a connecting part between the left connecting part and the right connecting part, the connecting part comprises a corrugated pipe section, middle flanges are arranged at the two ends of the corrugated pipe section respectively, and a plurality of sets of spacing adjusting assemblies are arranged between the two middle flanges; the left connecting part comprises a left connecting section, a left connecting flange is arranged at the end, away from the connecting part, of the left connecting section, and a left flange sealing gasket is arranged on the outer end face of the left connecting flange. The right connecting part comprises a right connecting section, a right connecting flange is arranged at the end, away from the connecting part, of the right connecting section, and a right flange sealing gasket is arranged on the outer end face of the right connecting flange. The pipeline joint is reasonable in structural design, the length of the pipeline joint can be adaptively adjusted according to needs so as to meet the connection requirements of two pipelines, the construction process is simplified, the operation of frequently adjusting the connected pipelines is avoided, and the working efficiency is improved.

The application discloses a windproof device and method for improving the safety of a unit curtain wall, which comprises a base, an adsorption assembly, a winch, a cable, a counterweight assembly, a buffer tire assembly and a handrail. The adsorption assembly adsorbs and fixes the base to the surface of the unit curtain wall, the winch tightens the cable, so that the unit curtain wall is in tension constraint with the hook, the temporary anchor point or the adsorption fulcrum, thereby inhibiting the rotation and swing in the hoisting process; the counterweight assembly lowers the gravity center, the buffer tire assembly absorbs the in-place impact, and the handrail facilitates manual fine adjustment and positioning. The application can reduce the traditional cable wind rope layout, and improve the hoisting safety and efficiency of the unit curtain wall.

This application relates to an ecological revetment structure. This application is applicable to the field of water conservancy engineering technology. The technical problem to be solved by this application is: to provide an ecological revetment structure. The technical solution adopted in this application is: an ecological revetment structure, comprising: fish nest blocks, located on the riverbed at the toe of a slope, with a first cavity in the inner top for fish to inhabit, and at least partially connected to the first cavity via vertically arranged channels on the water-facing sidewall; multiple fish nest blocks arranged along the toe of the slope to form a supporting base for the revetment structure; ecological blocks, located on top of the fish nest blocks, with a second cavity in the inner top for filling soil, and multiple through holes in the inner bottom connecting to the second cavity; multiple ecological blocks stacked on top of each other on the slope surface; and connectors, located between adjacent fish nest blocks, adjacent ecological blocks, and between adjacent fish nest blocks and ecological blocks, enabling the fish nest blocks and ecological blocks to be horizontally adjacent or vertically stacked.

The utility model provides a cable bridge modular structure connecting and installing device in an electrical vertical shaft, which comprises a frame body, the frame body is of a hollow structure, the size of the frame body is matched with the size of a reserved hole for a cable bridge to penetrate through, and the frame body is provided with a connecting hole; the connecting lugs are arranged around the outer wall of the frame body, the connecting lugs are located on the same plane, and at least one through hole is formed in each connecting lug; and the first fastener is used for penetrating through the through hole to be connected with the floor template. The device is easy to install, after the device is installed, concrete can be poured on a floor formwork, after the concrete is solidified, the device can form a reserved hole without being disassembled, the construction process is simple, the construction technical difficulty is reduced, the processes of secondary formwork erecting, fireproof blocking, root closing-up and the like of the cable bridge are omitted, and the construction efficiency is improved. The construction cost is reduced, and the work efficiency is improved.

The utility model discloses a combined road surface temporary widening structure for large piece transportation relates to highway engineering technical field, and the purpose is to make the steel plate that lays the road surface wider can be stable under the heavy pressure of vehicle, and the following technical scheme is proposed: including multiple sets of steel plates, multiple sets of steel plates one end is located on the roadbed, and the other end of multiple sets of steel plates is suspended above the recessed area outside the roadbed, and the bottom of each set of steel plates is installed counterweight part away from the side of river course, and the counterweight part is connected with each other, and the counterweight part is arranged in the base groove of roadbed opening. Compared with the mode that the traditional concrete is supported by the aid of the column in the recessed area and is poured, the utility model only needs to dig the base groove on the side away from the recessed area, and the counterweight part is put into and is connected with the steel plate, can avoid the preliminary work such as drainage, dredging under the complex environment, also need not to build construction platform, use professional equipment and technical personnel to pour the concrete, greatly simplifies the construction process, and reduces the construction cost.

The utility model relates to the field of building decoration and beautifying construction, and particularly discloses a rubber nozzle shearing tool. Comprising a main body, a knife handle, a blade and a pressing handle, and the main body is of a long-strip-shaped structure, is made of a high-strength material and is provided with a cutting opening for containing a glue nozzle. The pressing handle is pivoted to the middle of the main body, and the glue nozzle inserted between the pressing handle and the main body can be flattened through rotation so as to adjust the shape of the glue nozzle. And the knife handle is pivoted to the front end of the main body and is provided with a blade, and the knife handle drives the blade to shear the flattened glue nozzle when being pressed, so that a glue outlet meeting construction requirements is formed. The cutter is suitable for shearing a rubber nozzle of a glass cement bottle or a beautifying rubber bottle and is widely applied to scenes such as building sealing, decoration joint filling and beautifying nursing, and pretreatment and accurate shearing of the rubber nozzle are achieved through the structural design; the tool is simple and convenient to operate, compact in structure, suitable for various glue nozzle specifications and capable of meeting different construction requirements.

The application discloses a kind of service concrete penetration type anti-freezing protective material and preparation method thereof, belong to concrete protection technical field.The composition of the protective material is: organic silicon modified penetration enhancement component 30~60 parts, nano-crystalline component 10~30 parts, microbial self-repairing component 5~20 parts, composite silane coupling agent 2~8 parts, penetration accelerator 1~5 parts, stabilizer 0.5~3 parts, defoaming agent 0.1~1 part, water 10~50 parts.The application constructs "hydrophobic barrier-crystallization densification-microbial self-repairing" triple synergistic protection system, solves the technical bottleneck that existing concrete protective material penetration depth is shallow, long-acting protection stability is poor, has no active crack repair capacity, construction is complicated, and on-site adaptability is poor.The application preparation process is simple, product performance is stable, cost-effective, can long-acting improve the frost resistance of concrete structure in severe cold area.

This invention discloses a method for constructing concrete lining for large-section, pure circular, thin-walled steel-lined tunnels, relating to the field of underground chamber construction technology. It includes prefabricated hook-type hooks, steel plate lining, and ear plates; assembling the steel plate lining to form a lining steel template, connecting the ear plates to the outer surface of the lining steel template; binding inner and outer reinforcing meshes on the outer surface of the lining steel template; binding the straight sections of the hook-type hooks and the inner reinforcing mesh, ensuring that all straight sections are aligned in the same direction; using multiple square wooden boxes assembled into end molds to seal the ends of the lining steel template, with multiple entry windows spaced circumferentially along the lining steel template on the end molds; pouring concrete in layers from bottom to top, each layer being 450mm thick, with a 1.5-hour interval between adjacent layers. This invention eliminates the need for any openings in the steel lining, avoiding the weak points in sealing caused by traditional perforated connection methods, and ensuring the overall integrity of the steel plate lining.