31results about How to "Timely reinforcement" patented technology

The invention relates to on-site monitoring and evaluation control for adjacent viaduct pile foundations of a subway, and particularly discloses an on-site monitoring and evaluation method for the settlement of pile foundations, which comprises the steps of: setting a bench mark in an on-site monitoring area by using a precise levelling instrument and an indium steel ruler and forming a bench mark network; taking a bench mark control network as a benchmark to, acquire height data of the pile foundations, and collating the height data to obtain settlement displacement values according to a time sequence; and sorting the pile foundations into four types according to the settlement displacement values, and processing different types of pile foundations respectively, in particular reinforcing A type of pile foundations in time. The method realizes the on-site effective and timely monitoring and timely reinforcement on adjacent construction of underground engineering, overcomes the potential hazard caused to engineering construction by the lack of timely on-site monitoring, and has an important significance in controlling the settlement of the pile foundations caused by the adjacent construction and ensuring the use security of an adjacent building.

The invention relates to the technical field of electric power equipment detection and in particular relates to an evaluation method for a corrosion state of an in-service power transmission line rodtower and a metal framework. The evaluation method comprises the following steps: detecting each evaluation index of corrosion prevention performance and the substrate thickness of coating and platinglayers of the power transmission line rod tower and the metal framework; then calculating a deduction value of each index respectively and counting the deduction values according to a determined corrosion grade of a service environment of the power transmission line rod tower and the metal framework and a detection result, so as to obtain a deterioration degree; and comprehensively evaluating thecorrosion state of the in-service power transmission line rod tower and the metal framework. According to the evaluation method provided by the invention, the surface state and the corrosion degree of the coating and plating layer are evaluated according to the service environment, so that the corrosion state of the in-service power transmission line rod tower and the metal framework is evaluated. By adopting the evaluation method, the corrosion state of the in-service power transmission line rod tower and the metal framework can be evaluated, the evaluation is more accurate, and replacementor reinforcement and corrosion prevention treatment is carried out on the transmission line rod tower and the metal framework in time, so that the operation risks of power grids are reduced.

The invention relates to a squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and a construction technology. The support structure comprises arch speed control anchor cables (1), side wall speed control anchor cables (2), arch limiting anchor cables (3), side wall limiting anchor cables (4), arch locking anchor cables (5), side wall locking anchor cables (6), a first layer primary support (7) and a second layer primary support (8); all anchor cables in the construction technology adopt drilling and grouting simultaneously, however, reserved tensioning is conducted according to times, batches and parts. Controlling release on surrounding rock stress is achieved, the surrounding rock deformation growth rate and deformation accumulation amount are lowered, large deformation is effectively controlled, steel arch centering replacement caused by too large deformation is avoided, and the surrounding rock collapse hazard is lowered; in addition, the work efficiency is improved, constructors can conduct drilling conveniently, and it is guaranteed that the anchor cable positions are accurate, and tensioning can be conducted in time.

The invention discloses high-strength and quick-hardening shotcrete and a soft-rock tunnel surrounding rock closing and strengthening method. The high-strength and quick-hardening shotcrete compriseswater, cement, fly ash, gravel and sand, wherein the weight ratio of the fly ash to the cement is 0.92:0.08, the ratio of the weight of water to the total weight of the cement and the fly ash is (0.35-0.45):1, the ratio of the weight of the gravel and the total weight of the cement and the fly ash is (1.35-1.4):1, and the ratio of the weight of the sand and the total weight of the cement and the fly ash is 2.02:1. The high-strength and quick-hardening shotcrete is high in setting speed, can achieve initial setting within 35min plus or minus 5min, has the cubic average compressive strength being higher than or equal to 20MPa at 4h, has the cubic average compressive strength being higher than or equal to 30MPa at 24h, can timely and quickly close and strengthen an excavated surface, and hashigh early strength. In tunnel construction, the high-strength and quick-hardening shotcrete is sprayed first and then ordinary shotcrete is sprayed, so that effective connection of the low-age strength and the high-age strength of the shotcrete is achieved, and optimization of the functionality and the economy of the shotcrete is achieved.

The invention relates to a polyurethane-water glass composite grouting material and a preparation method thereof, which belong to the technical field of construction materials. With lower viscosity and surface tension and high infiltration capability, silane coupling agent utilized by the invention can be rapidly spread on a constructed surface to infiltrate into cracks of a rock surface; meanwhile, inorganic groups in the silane coupling agent can react with oxide on the surfaces of the cracks to generate stable silicon-oxygen bonds, and the organic groups and NCO react to be connected onto organic macromolecules, so that the bonding strength and constructed surface infiltration of the grouting material are improved, meanwhile, a catalyst component is promoted to be uniformly dispersed into water glass, phase separation is prevented, the groutability is good, the permeability is high, and moreover, the polyurethane-water glass composite grouting material has good compressive strength;and the polyurethane-water glass composite grouting material can play the role of filling, reinforcement, waterproofing, leaking stoppage and the like for rock-soil / gravel structures, and is applicable to waterproofing and leaking stoppage for cracks and reinforcement and seepage resistance for foundations in bridges, subways, dams, rock strata, harbors, civil air defence works and the like.

The invention provides a multifunctional operation rack suitable for tunnel construction. The multifunctional operation rack comprises a movable portal, and a concrete guniting device, a jumbolter device and a steel arch splicing device are arranged on the movable portal. The steel arch splicing device is arranged on the movable portal, so that the splicing process of the steel arch is mechanized, the jumbolter device and the guniting device are integrated, the system integration degree is high, cooperative and efficient operation can be achieved, the working efficiency is improved, the arch is timely supported, the supporting efficiency is high, the quality is more stable, and the safety of tunnel construction is improved.

The invention discloses a fore-poling and ground pressure unloading mining method. The fore-poling and ground pressure unloading mining method comprises the following steps: constructing a stope linking path towards an ore body lower disc on a segmented lane on the perpendicular uppermost part on the center position of a stope, and separately constructing a stope room and an ore column cutting lane to an ore body upper disc along a perpendicular ore body in the stope after reaching the boundary of the ore body lower disc; utilizing the cutting lane to cut off a stress propagation way to release stress, and performing partial ground pressure unloading on a disc region ore room and the ore column stope; in the ore column cutting lane which corresponds to the uppermost segmented lane, constructing an upper fan-shaped long anchor cable and a lower fan-shaped long anchor cable in sequence for fore-poling; and in the cutting lane with a constructed ore column front layer, constructing the upper fan-shaped long anchor cable for fore-poling. The fore-poling and ground pressure unloading mining method realizes quick excavation under a bad geological condition of a mine deep part, adopts pre-unloading measures while performing extraction for a thick ore body through a mechanical disc region, reduces ground stress of the disc region ore room and the ore column stope, adopts fan-shaped long anchor cable fore-poling for the ore column stope affected by concentrated stress, and ensures mining safety of the disc region ore column.

The invention relates to a well drilling device. The well drilling device comprises a main body, a drill bit tire body and cutting teeth, wherein the drill bit tire body is arranged on one end part of the main body; the cutting teeth are formed on the drill bit tire body; the main body is provided with a drilling liquid runner used for inputting drilling liquid; a well-cementing fluid runner isolated from the drilling liquid runner and used for guiding into cementing fluid is also arranged on the main body; an outlet communicated with the well-cementing fluid runner is also formed in the side wall of the main body; the main body is provided with an axial line direction; the well-cementing fluid runner is provided with a first runner extending along the axial line direction of the main body; a drill bit port communicated with the well-cementing fluid runner is formed in the drill bit tire body; the diameter of the first runner is smaller than that of the drilling liquid runner. A gap of a crack development stratum can be effectively blocked by injecting the well-cementing fluid, so that leakage loss is prevented; the stability of a ground layer section which easily collapses and is not stable is enhanced, a well wall is reinforced, and collapse of the well wall is prevented; after drilling is finished, a blockage removing agent can also be injected to restore the permeability of the well wall.

The invention discloses a monitoring device for mine pressure of a coal mine stope. The monitoring device comprises a fixing column, a pressure equalizing monitoring device, a side monitoring device and top end monitoring devices, wherein the side monitoring device is arranged on the inner side of a roadway side plate; the fixing column is fixed in the center of the lower end surface of a roadway top plate; the lower end of the fixing column is connected with the pressure equalizing monitoring device; a vertical strip-shaped sliding groove is formed in the lower end of the fixing column; the top end monitoring devices are symmetrically arranged on the left side and the right side above the pressure equalizing monitoring device; a sliding rail is fixed on the bottom end surface of a supporting shell in the pressure equalizing monitoring device; a supporting column is connected to the sliding rail in a sliding mode; the supporting column is located on the inner side of the side monitoring device; and a point monitoring assembly is further arranged in the roadway top plate. According to the monitoring device, different pressures borne by the surfaces of the roadway top plate and the roadway side plate are monitored, so that the pressure equalizing monitoring device can collect and record the monitored pressure values.

The invention provides a method and device for predicting the bottom scouring depth of an underwater crossing pipeline, and belongs to the technical field of underwater crossing pipelines. According to the technical scheme provided by the embodiment of the invention, the corresponding limit equilibrium scouring depth and the duration of reaching the scouring equilibrium state are obtained based on the various characteristic parameters of the first crossing pipeline which is scoured in the river; and the data are obtained based on the actual scouring data, so that the reliability is relatively high, and the accuracy is high. According to the data, the scouring time and the scouring depth of the first crossing pipeline and the first-level kinetic reaction equation, a scouring pit vertical expansion mathematical model of the crossing pipeline in the river can be obtained, and the model can reflect the rule that the scouring pit depth changes along with the scouring time. Based on the mathematical model, the scouring depth of the to-be-predicted second crossing pipeline at any preset scouring time can be obtained, so that a riverbed can be reinforced in time, and the safety and reliability of the underwater crossing pipeline are improved.

The invention provides an operation rack for tunnel supporting construction. The operation rack comprises a movable portal, and a concrete guniting device, a jumbolter device and a steel arch splicing device are arranged on the movable portal; and the steel arch splicing device comprises a moving mechanism used for moving the steel arch and a grabbing mechanical arm used for grabbing the steel arch, and the grabbing mechanical arm is matched with the moving mechanism. The steel arch splicing device is arranged on the movable portal, so that the splicing process of the steel arch is mechanized, the jumbolter device and the guniting device are integrated, the system integration degree is high, cooperative and efficient operation can be achieved, the working efficiency is improved, the arch is timely supported, the supporting efficiency is high, the quality is more stable, and the safety of tunnel construction is improved.

The invention relates to a well drilling device. The well drilling device comprises a main body, a drill bit tire body and cutting teeth, wherein the drill bit tire body is arranged on one end part of the main body; the cutting teeth are formed on the drill bit tire body; the main body is provided with a drilling liquid runner used for inputting drilling liquid; a well-cementing fluid runner isolated from the drilling liquid runner and used for guiding into cementing fluid is also arranged on the main body; an outlet communicated with the well-cementing fluid runner is also formed in the side wall of the main body; the main body is provided with an axial line direction; the well-cementing fluid runner is provided with a first runner extending along the axial line direction of the main body; a drill bit port communicated with the well-cementing fluid runner is formed in the drill bit tire body; the diameter of the first runner is smaller than that of the drilling liquid runner. A gap of a crack development stratum can be effectively blocked by injecting the well-cementing fluid, so that leakage loss is prevented; the stability of a ground layer section which easily collapses and is not stable is enhanced, a well wall is reinforced, and collapse of the well wall is prevented; after drilling is finished, a blockage removing agent can also be injected to restore the permeability of the well wall.

The invention provides a liquid storage tank with a safety early warning and protecting device. The liquid storage tank comprises a tank body composed of a plurality of combined fences, the adjacent combined fences are connected through connecting pieces, and a first impermeable layer is laid in the tank body. The liquid storage tank further comprises a cable arranged around the side surface of the tank body and a winder connected with the cable. A plurality of tilt angle sensors connected with a control end are further installed on the tank body, a pressure membrane used for detecting the pressure of the tank body is further arranged between the inner wall of the tank body and the first impermeable layer, an elastic gasket is further arranged between the pressure membrane and the first impermeable layer, the elastic gasket abuts against the pressure membrane, and the signal output end of the pressure diaphragm and the winder are connected with the control end. The liquid storage tank with the safety early warning and protecting device has the beneficial effect that the use safety of the large impermeable tank is improved.

The invention discloses a looseness detecting device for shield cutter head detachable cutter, and the problem that the installation fastening state of the detachable cutter cannot be monitored in real time in the prior art is solved. The device comprises a cutter holder and a cutter arranged on the cutter holder by a bolt, an oil hole leading to a cutter mounting surface is arranged in the cutterholder, the periphery of a port of the oil hole leading to the mounting surfaced is provided with a sealing member, and the other end of the oil hole is connected to a pressure detection system. By setting the pressure detection system and a corresponding structure between the cutter holder and the cutter, the gap of the looseness detection of the shield machine cutter is filled, and the real-time monitoring of the tightening state of the cutter can be realized. The cutter can be prevented from falling off, the cutter can be strengthened in time, the construction efficiency is ensured, and the probability of the secondary damage to other parts of the shield machine by the falling cutter is reduced.

A disclosed ballastless track structure in a railway tunnel comprises lifting tools, a base plate and a track plate, the lifting tools are installed at the two sides of the base plate through anchor bolts, a first cushion plate is arranged in the outer sides of the lifting tools in a contact mode, a jack is installed at the top of the first cushion plate, and a pull rope displacement sensor is installed at one side of the top of the first base plate. Compared with the prior art, the reinforcing effect of the track plate can be detected through comparison testing of a base point vibration sensor and a measuring point vibration sensor, the stability condition of the track plate can be conveniently found in time, the function of positioning and monitoring the base plate is achieved, dynamic response when a train passes is improved, displacement of the lifting tool can be monitored in real time through the pull rope displacement sensor, when displacement of the lifting tools is monitored, a pull rope displacement sensor transmits an electric signal to a monitoring device through the wire, so that a worker can find sinking and cracking of the base plate in time, the timeliness of sinking and cracking of the base plate is improved, and the overall damage degree of a circuit is reduced.

The invention discloses a large-slope upside-down steel anchor-spray support structure for a deep foundation pit, which supports the support pit formed by excavating the basement in the foundation pit at a position to be protruded. The support structure includes: A first support pile and a second support pile, the second support pile is correspondingly arranged at a corresponding position of the support pit and the elevation of the second support pile is lower than the first support pile; The crown beam on the top of the first support pile; the upper support beam on the inner wall of the support pit, the upper support beam is supported on the inner wall of the support pit and the upper support The end of the beam protrudes from the support pit and is fixedly connected to the crown beam on the first support pile; the protective plate is arranged at the bottom of the upper support beam and is attached to the inner wall of the support pit ; the lower support beam on the second support pile, the lower support beam is provided with a certain distance from the inner wall of the support pit, and the lower support beam and the upper support beam pass through The protective plate is fixedly connected.

The invention discloses a high-strength rapid-hardening shotcrete and a method for sealing and reinforcing the surrounding rock of a soft rock tunnel, wherein the high-strength rapid-hardening shotcrete includes water, cement, fly ash, gravel and sand; the weight of cement and fly ash The ratio is 0.92:0.08, the ratio of the weight of water to the total weight of cement and fly ash is (0.35~0.45):1, and the ratio of the weight of gravel to the total weight of cement and fly ash is (1.35~1.4): 1. The weight ratio of sand to the total weight of cement and fly ash is 2.02:1. The concrete of the present invention has a fast setting speed, and the sprayed concrete can be initially set in 35±5 minutes. The average compressive strength of the shotcrete 4h cube is ≥20MPa, and the average compressive strength of the 24h cube is ≥30MPa, which can timely and quickly seal and reinforce the excavation surface , high early strength. In the tunnel construction, the initial spraying of high-strength and fast-hardening shotcrete and the re-spraying of ordinary shotcrete make the "young" and "old" strengths of the shotcrete effectively connected, and realize the optimization of the functionality and economy of the shotcrete.

The cable clamp with the protection effect comprises an upper clamp and a lower clamp, the upper clamp is oppositely arranged above the lower clamp, upper side plates are welded to the two ends of the upper clamp, lower side plates are welded to the two ends of the lower clamp, and fixing mechanisms are arranged between the upper side plates and the lower side plates on the two sides. The cable clamp comprises an upper clamp and a lower clamp, fixing mechanisms are arranged on the upper clamp and the lower clamp, each fixing mechanism comprises a first bolt and a first spring, the first springs are connected to the surfaces of the first bolts in a sleeving mode, and a connecting plate is arranged below the lower clamp. The cable clamp has the beneficial effects that the fixing mechanisms are arranged, and a cable can be clamped between the upper clamp and the lower clamp by rotating butterfly nuts of the fixing mechanisms; when cables with different diameters are fixed, the butterfly nut can be twisted according to the sizes of the cables for adjustment, the adjustment is very convenient and suitable for a large outer diameter range of the cables, meanwhile, the bottom block at the lower end of the first bolt is fixed by the second bolt, the first bolt can be stably fixed, and the limiting of the first bolt can be relieved by detaching the second bolt.

The invention proposes a multifunctional working platform suitable for tunnel construction, which includes a mobile door frame, on which a concrete spraying device, a bolter drilling device and a steel arch assembly device are arranged. The invention mechanizes the assembling process of the steel arch by installing a steel arch assembly device on the mobile gantry, and integrates a bolter device and a spraying device. The system has a high degree of integration, and can work collaboratively and efficiently to improve work efficiency. And the arch support is timely, the support efficiency is high, and the quality is more stable, and the safety of tunnel construction is improved.

The invention belongs to the technical field of steel coil transportation and particularly relates to a steel coil transportation auxiliary device. The steel coil transportation auxiliary device aimsto solve the problems that in the prior art, when a steel coil is fixed, the steel coil needs to be bundled with a steel wire rope by several circles to a truck, and when the truck turns, the steel wire rope can be snapped due to large inertia. According to the technical scheme, the steel coil transportation auxiliary device comprises a channel steel base and a steel coil. A storage battery and aprocessor are arranged on the inner wall of the bottom of the channel steel base and are close to the edge portion. The middle and the portions, close to the two side edges, of the upper surface of the channel steel base are both provided with supporting plates in a welded manner. The same upper base plate is welded to the top ends of the three supporting plates. The steel coil transportation auxiliary device can rapidly and tightly fix the left side and the right side of the steel coil, stress detectors on H-type steel web plates can transmit the pressure force of the steel coil on supportingrods and the stress condition of the supporting rods in time, and when the stress of the supporting rods excessively exceeds the limit value of the supporting rods, the stress detectors can transmitsignals to the processor in time, and then an alarm is triggered to notice a transportation driver to conduct reinforcing treatment in time.

The invention proposes a new type of working platform for tunnel construction, which includes a mobile portal frame, on which a concrete spraying device, a bolter drilling device and a steel arch assembly device are arranged; the steel arch assembly device It includes a moving mechanism for moving the segmented steel arch, a grabbing manipulator for grabbing the segmented steel arch, and a transport mechanism for transporting the assembled steel arch. The grabbing manipulator cooperates with the moving mechanism, and the The transportation mechanism cooperates with the mobile mechanism. The invention mechanizes the assembling process of the steel arch by installing a steel arch assembling device on the mobile gantry, and integrates a bolter device and a spraying device. Moreover, the arch support is timely, the support efficiency is high, and the quality is more stable, and the safety of tunnel construction is improved; and the work bench structure is simple, the failure rate is low, and the production cost can also be saved.

The invention discloses a flange with a loosening warning function, which comprises a first flange and a second flange. The first flange and the second flange are correspondingly provided with a plurality of threaded holes, corresponding to The two threaded holes are jointly threaded with locking bolts, and the side of the first flange close to the second flange is evenly and fixedly connected with a plurality of blocks corresponding to the locking bolts. A side surface of the second flange close to the first flange is uniformly provided with a plurality of mounting grooves for matching with the abutting blocks. In the present invention, by setting the indicator block, the display tube, the piston plate and the return spring, when the corresponding locking bolt becomes loose, the piston plate and the return spring cooperate to control the movement of the indicator block in the display tube, so that the maintenance personnel can check the flange. During the inspection, it is only necessary to directly check the position of the corresponding indicator block to know whether the corresponding locking bolt is loose, without using tools for detection, which improves the efficiency of inspection and maintenance.

The invention provides a novel operation rack for tunnel construction. The novel operation rack comprises a movable portal, and a concrete guniting device, a jumbolter device and a steel arch splicing device are arranged on the movable portal; the steel arch splicing device comprises a moving mechanism used for moving the segmented steel arch, a grabbing mechanical arm used for grabbing the segmented steel arch and a conveying mechanism used for conveying the spliced steel arch, the grabbing mechanical arm is matched with the moving mechanism, and the conveying mechanism is matched with the moving mechanism. The steel arch splicing device is arranged on the movable portal, so that the splicing process of the steel arch is mechanized, the jumbolter device and a guniting device are integrated, the device integration degree is high, cooperative and efficient operation can be achieved, the working efficiency is improved, the arch is timely supported, the supporting efficiency is high, the quality is more stable, and the safety of tunnel construction is improved; and the operation rack is simple in structure, low in failure rate and capable of saving production cost.

The invention discloses a shield construction method for a subway underneath passing high-speed rail line, which comprises the following steps: after a shield tunneling machine is adopted to perform tunneling in a rock-soil layer to reach a first preset distance away from the high-speed rail line, the shield tunneling machine continues to perform tunneling to excavate a tunnel, and segments are mounted in the tunnel to form an annular lining; grouting is synchronously conducted between the constructed annular lining and the rock-soil layer; and after the shield tunneling machine conducts tunneling through the high-speed rail line and exceeds the second preset distance of the high-speed rail line, a conventional method is adopted for continuing to conduct tunneling. The method has the advantages of capability of reducing settlement during construction and after construction, high safety, simplicity and convenience in construction, easiness in operation, popularization and implementation and the like.

The invention discloses a self-adaptive steel structure connecting joint and a connecting method thereof and belongs to the technical field of steel structures. According to the self-adaptive steel structure connecting joint, a fourth connecting mode of H-shaped steel can be provided, the high-strength connecting joint is adopted for performing wrapping connection on the H-shaped steel, the H-shaped steel is connected conveniently in a high-temperature phase shape by depending on an enhanced double-way memory effect of a shape memory alloy, the H-shaped steel can be effectively retained and abutted in a low-temperature phase shape, and expansion connection between a pair of H-shaped steel and the connecting joint is achieved; meanwhile, specially-treated positioning rods are arranged for auxiliary purposes, and the positioning rods have the function of indirectly detecting H-shaped steel stress transmission while having the function of positioning the H-shaped steel; and on the one hand, the strength of connecting between the H-shaped steel can be remarkably improved, on the other hand, stress transmission between the H-shaped steel and non-normal detection are facilitated, and technicians can timely perform reinforcing and strengthening.

The invention discloses a self-adaptive steel structure connecting joint and a connecting method thereof and belongs to the technical field of steel structures. According to the self-adaptive steel structure connecting joint, a fourth connecting mode of H-shaped steel can be provided, the high-strength connecting joint is adopted for performing wrapping connection on the H-shaped steel, the H-shaped steel is connected conveniently in a high-temperature phase shape by depending on an enhanced double-way memory effect of a shape memory alloy, the H-shaped steel can be effectively retained and abutted in a low-temperature phase shape, and expansion connection between a pair of H-shaped steel and the connecting joint is achieved; meanwhile, specially-treated positioning rods are arranged for auxiliary purposes, and the positioning rods have the function of indirectly detecting H-shaped steel stress transmission while having the function of positioning the H-shaped steel; and on the one hand, the strength of connecting between the H-shaped steel can be remarkably improved, on the other hand, stress transmission between the H-shaped steel and non-normal detection are facilitated, and technicians can timely perform reinforcing and strengthening.

The invention provides a solar light-emitting diode factory building illuminating lamp and relates to the technical field of illuminating lamps. The illuminating lamp comprises a transverse plate, supporting rods are respectively arranged on two sides of the top of the transverse plate, the transverse plate is fixed on the inner top of a factory building through the supporting rods, and a mounting plate is longitudinally arranged on the front face of the transverse plate. The illuminating lamp is characterized in that a groove is longitudinally arranged in the bottom face of the mounting plate, a first spring is fixedly arranged on the inner top face of the groove, a movable plate is fixedly connected to the bottom of the first spring, sliding blocks are fixedly arranged on the two sides of the movable plate respectively, the two sliding blocks are arranged in two sliding grooves respectively, the two sliding grooves are formed in the two sides in the groove respectively, and the sliding blocks are in sliding fit with the sliding grooves. The bottom of the movable plate is connected with an illuminating lamp through a chain, and the illuminating lamp is located below the mounting plate. The invention aims to solve the problems that an existing workshop lighting lamp is installed at a certain height, when people want to clean dust on the lighting lamp, people need to stand on a platform to look up the lighting lamp to clean the dust, and the operation is very inconvenient.

The invention proposes a working platform for tunnel support construction, which includes a mobile door frame, on which a concrete spraying device, a bolter device and a steel arch assembly device are arranged; the steel arch assembly The device includes a moving mechanism for moving the steel arch and a grabbing manipulator for grabbing the steel arch, and the grabbing manipulator cooperates with the moving mechanism. The invention mechanizes the assembly process of the steel arch by installing a steel arch assembly device on the mobile portal frame, and integrates the anchor drilling device and the grouting device. The system has a high degree of integration, and can work collaboratively and efficiently to improve work efficiency. And the arch support is timely, the support efficiency is high, and the quality is more stable, and the safety of tunnel construction is improved.

The invention discloses a flange with a loosening warning function. The flange comprises a first flange plate and a second flange plate, wherein a plurality of threaded holes are correspondingly formed in the first flange plate and the second flange plate; a locking bolt is in threaded connection in every two corresponding threaded holes; a plurality of propping blocks corresponding to the lockingbolts are uniformly and fixedly connected to one side, close to the second flange plate, of the first flange plate; and a plurality of mounting grooves matched with the propping blocks are uniformlyformed in one side surface, close to the first flange plate, of the second flange plate. According to the flange, indicating blocks, a display tube, a piston plate and a reset spring are arranged, andwhen the corresponding locking bolts are loosened, the piston plate and the reset spring are matched to control the indicating blocks to move in the display tube, so that a maintainer can know whether the corresponding locking bolts are loosened or not by directly checking the positions of the corresponding indicating blocks when inspecting the flange, and the maintenance efficiency is improved without detection through a tool.