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32results about How to "Timely closure" patented technology

Shoe cabinet capable of cleaning shoes

The invention relates to a shoe cabinet capable of cleaning shoes. The shoe cabinet comprises a base and a shoe cabinet body. The shoe cabinet body is fixedly arranged at the upper end of the base. The shoe cabinet is characterized in that a cabinet door is hinged to the front end of the shoe cabinet body, a cavity for containing the shoes is formed in the inner side of the shoe cabinet body, an ultrasonic device is arranged at the top end of the cavity, and a dust collector is arranged at the bottom end of the cavity; multiple partition plates are arranged in the cavity, the partition plates all face the cabinet door in an obliquely-upward mode, and all the partition plates can move in the vertical direction. Compared with the prior art, the shoe cabinet is simple in structure, high in dust removal efficiency and capable of ultrasonically cleaning the shoes.
Owner:诸葛明

Spittoon trash can with sampling circuit

The invention discloses a spittoon trash can with a sampling circuit. The spittoon trash can comprises a sputum bag, a box body, a box cover, a solar cell panel and a single chip microcomputer. The bottom of the sputum bag is connected to the bottom of the side wall of the box body through a shaft. A stepping motor is arranged on the shaft. The side wall of the sputum bag is fixed on the side wall of the box body. The end wall of the sputum bag is arc-shaped. The arc length of the end wall of the sputum bag is larger than the length of the side wall of the box body. The output end of the single chip microcomputer is connected with the stepping motor. The single chip microcomputer is arranged in the box cover. An approach switch is arranged on the side wall of the box body. An infrared sensor is arranged in the opening of the sputum bag. The approach switch and the infrared sensor are both connected to the input end of the single chip microcomputer. An amplifying circuit, the sampling circuit and a filter circuit are sequentially arranged between the approach switch and the single chip microcomputer. The sampling circuit comprises an operational amplifier A1, a diode D1, a slide rheostat R4, a capacitor C1, a capacitor C2 and a capacitor C3. The spittoon trash can realizes the purposes of storing sputum conveniently and protecting the environment.
Owner:NANTONG JIUWANG ELECTRONICS

Bilateral expanding excavation construction method for middle pilot tunnel in tunnel

A bilateral expanding excavation construction method for a middle pilot tunnel of a tunnel is provided. Section or excavation width of the middle pilot tunnel is generally not larger than that of a common double-line or double-lane tunnel; a step construction method is adopted, and the construction method is the same as that of a common double-line or double-lane tunnel; and the construction method is familiar to constructors, and the construction difficulty is avoided. A primary support section of the middle pilot tunnel can be expanded and excavated after being closed by at least 3 meters; if a side tunnel face is stable, and the problem of the operation height of manual installation of a steel frame and an anchor rod is solved, one-time excavation and support can be achieved, and the construction is more convenient; or otherwise, a side tunnel is excavated according to a two-step or three-step method. The primary support of the middle pilot tunnel can be timely closed; the primary support of the side tunnel and the primary support of the middle pilot tunnel can be completely connected in sequence, and various errors and deformation influences of surrounding rocks and the supportare left at an inverted arch part for treatment; and the construction progress is basically the same as that of the common double-line or double-lane tunnel.
Owner:CHINA RAILWAY 12TH BUREAU GRP +1

Intelligent street lamp monitoring system

The invention discloses an intelligent street lamp monitoring system. The system comprises a street lamp, a charging pile, a display, a camera, an emergency video intercom, a sound box, a 5G base station, a cooling fan, an environment monitoring module, a serial server, a switch, a POE, an optical modem, a router, an NB-IoT module, a DTU module, an AP and an intelligent street lamp monitor. The street lamp, the charging pile, the displayer, the camera, the emergency video intercom, the sound box, the 5G base station, the cooling fan, the environment monitoring module, the serial server, the switch, the POE and the optical modem are connected with the intelligent street lamp monitor through power lines. The router, the NB-IoT module, the DTU module and the intelligent street lamp monitor are connected through power lines and signal lines. The charging pile, the display, the camera, the emergency video intercom, the sound box, the serial server, the router and the switch are connected through signal lines. The intelligent street lamp monitoring system provided by the invention is more intelligent in street lamp management and more stable and reliable in operation of each terminal device.
Owner:ZHEJIANG DABONG TECH

Hidden in-vehicle illuminating lamp for new energy vehicle

The invention discloses a hidden in-vehicle illuminating lamp for a new energy vehicle. The technical problem that a lamp body cannot be protected due to the fact that an illuminating lamp is exposedoutside is solved. The hidden in-vehicle illuminating lamp comprises a fixing plate; a pair of supporting plates is mounted on the lower surface of the fixing plate; rotating rods are movably mountedon the side wall surfaces of the pair of supporting plates; the rotating rods are sleeved with a rotating sleeve; an illuminating lamp is movably mounted on the lower surface of the rotating sleeve; aprotection box is mounted on the upper surface of the fixing plate; a storage and extension structure is mounted between the fixing plate and the protection box; an opening is formed in the lower surface of the protection box; a linkage opening and closing part is mounted at the opening of the protection box. By means of the storage and extension structure, the illuminating lamp can extend out when used and be stored in the protection box when not used, so that a good protection function is provided for the lamp body; an opening and closing plate can be automatically opened in the lamp body extension process through the linkage opening and closing part, the lamp body can be closed in time in the lamp body storage process, and the lamp body is better protected.
Owner:INNER MONGOLIA JUNENG ENERGY SAVING SERVICE

Spittoon trash can with amplifying circuit

The invention discloses a spittoon trash can with an amplifying circuit. The spittoon trash can comprises a sputum bag, a box body, a box cover, a solar cell panel and a single chip microcomputer. The bottom of the sputum bag is connected to the bottom of the side wall of the box body through a shaft. A stepping motor is arranged on the shaft. The side wall of the sputum bag is fixed on the side wall of the box body. The side wall of the sputum bag is made of flexible materials. The end wall of the sputum bag is arc-shaped. The arc length of the end wall of the sputum bag is larger than the length of the side wall of the box body. The solar panel is electrically connected with the single chip microcomputer. The output end of the single chip microcomputer is connected with a stepping motor. The single chip microcomputer is arranged in the box cover. An approach switch is arranged on the side wall of the box body. An infrared sensor is arranged in the opening of the sputum bag. The approach switch and the infrared sensor are both connected to the input end of the single chip microcomputer. The amplifying circuit, a sampling circuit and a filter circuit are sequentially arranged between the approach switch and the single chip microcomputer. The amplifying circuit comprises an operational amplifier A1and an audion T1. The spittoon trash can realizes the purposes of storing sputum conveniently and protecting the environment.
Owner:NANTONG JIUWANG ELECTRONICS

OLED screen body drive circuit

The invention discloses an OLED screen body of a fuse-type short-circuit prevention structure, and a screen body drive circuit for providing a compensating current for the OLED screen body when the OLED screen body is short-circuited to burn a short-circuit point, and returning the current to a normal value when the short-circuit point is burnt down. The drive circuit comprises a power supply circuit for supplying power to the OLED screen body, a current compensation circuit for supplementing a current to the OLED screen body, a switching circuit connected between the current compensation circuit and the OLED screen body, and a control circuit. When the control circuit controls the switching circuit to be turned on, the current compensation circuit starts to provide the compensating current for the OLED screen body; when the control circuit controls the switching circuit to be turned off, the current compensation circuit stops the providing of the compensating current for the OLED screen body. The circuit can timely burn down the fuse structure under the condition that the screen body is short-circuited, so as to protect other light emitting regions of the screen body from being affected, and prolong the service life of an OLED product.
Owner:GUAN YEOLIGHT TECH CO LTD

Safe pressure container

The invention discloses a safe pressure container. The top of the pressure container is provided with a cylindrical mounting groove. The top of the mounting groove is open, and the bottom of the mounting groove is provided with an exhaust hole. The mounting groove is communicated with the pressure container through the exhaust hole. Transition between the exhaust hole and the bottom face of the mounting groove is achieved through a conical surface. A valve element is arranged between the exhaust hole and the mounting groove. The safe pressure container has the restorability function, the inner pressure of the pressure container can be controlled within the set range, when the inner pressure of the pressure container is increased, the redundant gas can be discharged out of a battery timely, and the safety of the pressure container is guaranteed; when the inner pressure of the pressure container restores to the stipulated value, a safety valve can be closed timely.
Owner:WUXI KELAIXIN ELECTROMECHANICAL MFG

Spittoon trash can with amplifying circuit

The invention discloses a spittoon trash can with an amplifying circuit. The spittoon trash can comprises a sputum pocket, a box body, a box cover, a solar cell panel and a single chip microcomputer. The bottom of the sputum pocket is connected to the bottom of the side wall of the box body through a shaft, a stepping motor is arranged on the shaft, the side wall of the sputum pocket is fixed on the side wall of the box body, the side wall of the sputum pocket is made of flexible materials, the end wall of the sputum pocket is in an arc shape, and the arc length of the end wall of the sputum pocket is larger than the length of the side wall of the box body. The solar cell panel is electrically connected with the single chip microcomputer, the output end of the single chip microcomputer is connected with the stepping motor, and the single chip microcomputer is arranged in the box cover. A proximity switch is arranged on the side wall of the box body, an infrared sensor is arranged at the opening position of the sputum pocket, the proximity switch and the infrared sensor are both connected to the input end of the single chip microcomputer, and the amplifying circuit, a sampling circuit and a filter circuit are sequentially in series connection between the proximity switch and the single chip microcomputer. The purposes of storing sputum conveniently and protecting the environment are convenient.
Owner:NANTONG JIUWANG ELECTRONICS

Self-heating type anti-frost-cracking concrete building outer wall

The invention discloses a self-heating type anti-frost-cracking concrete building outer wall, and belongs to the technical field of building outer walls. The building outer wall can realize that on the basis of traditional anti-frost concrete, a gap is actively formed through a mode of autonomously sensing external cold energy, so that external air can enter the gap, a self-cracking heating pipe preset inside the gap is frozen and cracked in advance, heat dissipation powder in the pipe is released, a large amount of heat is released through the reaction characteristic of the heat dissipation powder and oxygen in air, the interior of concrete is heated through a self-contracting heat conduction pipe, meanwhile, half softening is achieved after solid is converted into liquid based on the phase change heat storage characteristic of a double-state filling body in the self-contracting heat conduction pipe, at the moment, an expansion bag on the other half extrudes the double-state filling body through the thermal expansion effect to force the double-state filling body to transmit extrusion force into the concrete, so as to compensate expansion of the concrete, the cracking phenomenon ofthe concrete is remarkably improved, and the strength of the building outer wall is improved.
Owner:劳业鸿

Fully-enclosed recycling and automatic disassembly production line for waste refrigerator compressors

The invention belongs to the technical field of waste refrigerator recycling, specifically discloses a fully-enclosed automatic disassembly production line for waste refrigerators, and further provides a production method. The fully-enclosed automatic disassembly production line includes an operating system and a PLC control system, and further includes a harmful gas processing chamber, and the operating system includes an input transfer device, an isolation chamber I, a compressor separation chamber, a box gas volatilization chamber, an isolation chamber II and an output transfer device; a compressor processing chamber is arranged on one side of the compressor separation chamber, and the compressor processing chamber is connected with an isolation chamber III and waste oil processing equipment; and the isolation chamber I, the compressor separation chamber, the box gas volatilization chamber, the isolation chamber II, the compressor processing chamber and the isolation chamber III areeach provided with a gas extracting device which communicates with the harmful gas processing chamber. The entire compressor disassembly process is performed in a closed space, and no pollution leakage is produced in the entire operation process.
Owner:上海道简机电科技有限公司

Fresh air ventilator provided with by-pass door

The invention discloses a fresh air ventilator provided with a by-pass door, and belongs to the technical field of fresh air ventilator equipment. A fresh air ventilator in the prior art is relativelylow in air exchange efficiency, is complex in structure and is complex to operate. The fresh air ventilator provided with the by-pass door comprises an air inlet tube, a filter assembly and a by-passair flue, wherein the filter assembly is mounted opposite to a tube opening of the air inlet tube; the by-pass air flue and the filter assembly are arranged side by side and communicate with the airinlet tube; the by-pass air flue is equipped with a cylindrical housing capable of sealing the by-pass air flue; and the cylindrical housing is connected with a motor. According to the fresh air ventilator disclosed by the invention, the cylindrical housing is arranged, and the motor controls rotation of the cylindrical housing, so that a by-pass channel can be timely opened or closed, outdoor airwith good quality can directly enter an air inlet, and a usage rate of the filter assembly can be reduced, and therefore, abrasion on the filter assembly is reduced, the service life of the filter assembly is effectively prolonged, and use cost is reduced.
Owner:AUPU HOME STYLE CORP LTD

Anti-leakage IH rice cooker production injection mold convenient to disassemble

The invention relates to an anti-leakage IH rice cooker production injection mold convenient to disassemble. The anti-leakage IH rice cooker production injection mold comprises a supporting bottom plate and an upper mold body, wherein a mounting mechanism is arranged in the supporting bottom plate; the left side and the right side of the supporting bottom plate are connected with threaded rods through motors; a lower mold body is fixed to the upper portion of a top block; the upper mold body is located on the inner side of a positioning connecting mechanism; the interior of the upper mold bodyis connected with an ejector rod through a second spring and a limiting block; an injection molding butt joint opening is fixed to the upper end of the upper mold body; and the upper end of the positioning connecting mechanism is connected with a moving plate through a fourth spring. Compared with the prior art, the anti-leakage IH rice cooker production injection mold convenient to disassemble has the beneficial effects that different molds of equipment can be replaced conveniently through the mounting mechanism and the positioning connecting mechanism, so that equipment production is diversified; and meanwhile, the equipment adopts various anti-leakage structures, so that the situations that the equipment leaks, raw material waste is caused, and the product yield decreases can be prevented.
Owner:广东天启电器有限公司

Spittoon trash can with sampling circuit

The invention discloses a spittoon trash can with a sampling circuit. The spittoon trash can comprises a sputum bag, a box body, a box cover, a solar cell panel and a single chip microcomputer. The bottom of the sputum bag is connected to the bottom of the side wall of the box body through a shaft. A stepping motor is arranged on the shaft. The side wall of the sputum bag is fixed on the side wall of the box body. The end wall of the sputum bag is arc-shaped. The arc length of the end wall of the sputum bag is larger than the length of the side wall of the box body. The output end of the single chip microcomputer is connected with the stepping motor. The single chip microcomputer is arranged in the box cover. An approach switch is arranged on the side wall of the box body. An infrared sensor is arranged in the opening of the sputum bag. The approach switch and the infrared sensor are both connected to the input end of the single chip microcomputer. An amplifying circuit, the sampling circuit and a filter circuit are sequentially arranged between the approach switch and the single chip microcomputer. The sampling circuit comprises an operational amplifier A1, a diode D1, a slide rheostat R4, a capacitor C1, a capacitor C2 and a capacitor C3. The spittoon trash can realizes the purposes of storing sputum conveniently and protecting the environment.
Owner:NANTONG JIUWANG ELECTRONICS

An oled screen drive circuit with a fuse type anti-short circuit structure

The invention discloses an OLED screen body of a fuse-type short-circuit prevention structure, and a screen body drive circuit for providing a compensating current for the OLED screen body when the OLED screen body is short-circuited to burn a short-circuit point, and returning the current to a normal value when the short-circuit point is burnt down. The drive circuit comprises a power supply circuit for supplying power to the OLED screen body, a current compensation circuit for supplementing a current to the OLED screen body, a switching circuit connected between the current compensation circuit and the OLED screen body, and a control circuit. When the control circuit controls the switching circuit to be turned on, the current compensation circuit starts to provide the compensating current for the OLED screen body; when the control circuit controls the switching circuit to be turned off, the current compensation circuit stops the providing of the compensating current for the OLED screen body. The circuit can timely burn down the fuse structure under the condition that the screen body is short-circuited, so as to protect other light emitting regions of the screen body from being affected, and prolong the service life of an OLED product.
Owner:GUAN YEOLIGHT TECH CO LTD

A spittoon trash can with amplifying circuit

The invention discloses a spittoon trash can with an amplifying circuit. The spittoon trash can comprises a sputum pocket, a box body, a box cover, a solar cell panel and a single chip microcomputer. The bottom of the sputum pocket is connected to the bottom of the side wall of the box body through a shaft, a stepping motor is arranged on the shaft, the side wall of the sputum pocket is fixed on the side wall of the box body, the side wall of the sputum pocket is made of flexible materials, the end wall of the sputum pocket is in an arc shape, and the arc length of the end wall of the sputum pocket is larger than the length of the side wall of the box body. The solar cell panel is electrically connected with the single chip microcomputer, the output end of the single chip microcomputer is connected with the stepping motor, and the single chip microcomputer is arranged in the box cover. A proximity switch is arranged on the side wall of the box body, an infrared sensor is arranged at the opening position of the sputum pocket, the proximity switch and the infrared sensor are both connected to the input end of the single chip microcomputer, and the amplifying circuit, a sampling circuit and a filter circuit are sequentially in series connection between the proximity switch and the single chip microcomputer. The purposes of storing sputum conveniently and protecting the environment are convenient.
Owner:NANTONG JIUWANG ELECTRONICS

Spittoon trash can with filter circuit

The invention discloses a spittoon trash can with a filtering circuit. The spittoon trash can comprises a sputum bag, a box body, a box cover, a solar cell panel and a single-chip microcomputer, wherein the bottom of the sputum bag is connected to the bottom of the side wall of the box body through a shaft, a stepping motor is arranged on the shaft, the side wall of the sputum bag is fixed to the side wall of the box body, the end wall of the sputum bag is in the shape of an arc, the length of the arc of the end wall of the sputum bag is larger than the length of the side wall of the box body, the solar cell panel is electrically connected with the single-chip microcomputer, the output end of the single-chip microcomputer is connected the stepping motor, a proximity switch is arranged on the side wall of the box body, an infrared sensor is arranged on an opening of the sputum bag, both the proximity switch and the infrared sensor are connected to the input end of the single-chip microcomputer, an amplifying circuit, a sampling circuit and the filtering circuit are sequentially connected in series between the proximity switch and the single-chip microcomputer, and the filtering circuit comprises an operational amplifier A1, a capacitor C1, a capacitor C2 and a capacitor C3. Thus, sputum can be conveniently stored, and the environment can be protected.
Owner:NANTONG JIUWANG ELECTRONICS

Bi-directional water drain valve structure easy in adjustment of flow

The invention relates to the technical field of water drain valves and discloses a bi-directional water drain valve structure easy in adjustment of a flow. The bi-directional water drain valve structure easy in adjustment of the flow comprises a valve body, a sealing bolt in threaded connection with one side of the bottom of the valve body in a sleeved manner, a fixed sleeve and a second fixed sleeve; the fixed sleeve and the second fixed sleeve are fixedly connected to the interior of the valve body in the sleeved manner; a first sealing cover is in threaded connection to threads on the top of the fixed sleeve in the sleeved manner; an adjusting mechanism is fixedly connected to the interior of the first sealing cover in the sleeved manner; a filter screen is installed between the fixed sleeve and the second fixed sleeve in the sleeved manner; and the second fixed sleeve is movably provided with a lifting mechanism arranged on the inner side of the filter screen inside in the sleevedmanner. For the bi-directional water drain valve structure in adjustment of the flow, through matching use of the fixed sleeve, the second fixed sleeve, a filter screen and the second sealing cover, amemory alloy spring can be arranged at a lower position of the valve body; when hot water flows into the valve body, the memory alloy spring can be preferentially in contact with the hot water to jack up a spherical valve with thermal expansion; and the spherical valve and the water outlet hole are in contact sealing, and closing of the spherical valve is achieved in time.
Owner:NANTONG LONGYUAN POWER STATION VALVE

Inflatable clean room for installing geographic information system (GIS) equipment

The invention discloses an inflatable clean room for installing geographic information system (GIS) equipment, and relates to the technical field of electric equipment. The inflatable clean room comprises an inflatable bracket and room walls arranged on the inflatable bracket, wherein the inflatable bracket and the room walls enclose a dust isolation room. The light weight, small size, convenienttransportation, convenient use, time saving and labor saving of the clean room are realized through the inflatable bracket, the room walls and the like.
Owner:STATE GRID HEBEI ELECTRIC POWER CO LTD +1

Mixing type extruder for refrigerator door seal machining

The invention discloses a mixing type extruder for refrigerator door seal machining. The mixing type extruder comprises an extrusion pipeline; a driving device is connected with one side of the extrusion pipeline; an extrusion port is formed in the other side of the extrusion pipeline; a feeding hopper is formed in the top of the side, close to the driving device, of the extrusion pipeline; a vertical first connection frame is arranged on the extrusion pipeline on one side of the feeding hopper; a vertical second connection frame is arranged at the top of one side, close to the extrusion port,of the extrusion pipeline; a fixed sleeve is mounted in the upper inner side of the second connection frame; and one end of the fixed sleeve is connected with a first limiting block. During the use,the mixing type extruder is convenient to close the extrusion port in time to prevent redundant mixed materials from being extruded, and convenient to clean the dust on the outer side of the extrusionport when the dust falls to the outer side of the extrusion port; and a protection cover is closed one the outer side of the extrusion port to play a dustproof role for the extrusion port, so that the using of the users is more facilitated.
Owner:安徽省星年华电器有限公司

Constant current source emergency stop device for energy storage converter

The invention provides a constant-current source emergency stop device for an energy storage converter in the technical field of energy storage converters. The constant-current source emergency stop device comprises a constant-current source series circuit, a low-speed IO board, a high-speed IO board, a fan driving board, a level conversion circuit, a driving circuit, a resistor R6, a resistor R7 and a capacitor C1. The constant current source series circuit is respectively connected with the low-speed IO board, the high-speed IO board, the resistor R6, the resistor R7 and the capacitor C1; one end of the fan driving board is connected with the constant-current source series circuit, and the other end of the fan driving board is connected with the low-speed IO board; one end of the level conversion circuit is connected with the resistor R7 and the capacitor C1, and the other end of the level conversion circuit is connected with the driving circuit. The method has the advantage that the sudden stop reliability and expansibility of the constant current source are greatly improved.
Owner:FUJIAN NEBULA ELECTRONICS CO LTD

High-efficiency drilling device for stone engraving

The invention discloses a high-efficiency drilling device for stone engraving, relates to the technical field of stone engraving and drilling devices, and aims to conveniently control the cooling liquid adding amount based on the rotating speed. A drilling gun body and a positioning mechanism are specifically included, an output shaft is arranged on one side of the drilling gun body and connectedwith a connecting shaft through a fixing pin, an annular tool apron is welded to the outer wall of the bottom of the connecting shaft, an annular drilling tool is integrally arranged on the outer wallof the bottom of the annular tool apron, and a water storage box is installed on the outer wall of one side of the drilling gun body through a connecting frame. The water storage box is located on the outer side of the output shaft, a linkage rubber head is integrally arranged on the circumferential inner wall, close to the output shaft, of the water storage box and is of a hollow structure, anda water leakage groove is formed in the outer wall of one side of the linkage rubber head. By means of the high-efficiency drilling device for stone engraving, cooling liquid flows out along with rotation of the output shaft, the purpose that the output quantity of the cooling liquid is in direct proportion to the rotating speed of the output shaft is achieved, the drilling efficiency is improved,and meanwhile the consumption of the cooling liquid is reduced.
Owner:耒阳市盛唐石业有限公司

Spittoon trash can with filtering circuit

The invention discloses a spittoon trash can with a filtering circuit. The spittoon trash can comprises a sputum bag, a box body, a box cover, a solar cell panel and a single-chip microcomputer, wherein the bottom of the sputum bag is connected to the bottom of the side wall of the box body through a shaft, a stepping motor is arranged on the shaft, the side wall of the sputum bag is fixed to the side wall of the box body, the end wall of the sputum bag is in the shape of an arc, the length of the arc of the end wall of the sputum bag is larger than the length of the side wall of the box body, the solar cell panel is electrically connected with the single-chip microcomputer, the output end of the single-chip microcomputer is connected the stepping motor, a proximity switch is arranged on the side wall of the box body, an infrared sensor is arranged on an opening of the sputum bag, both the proximity switch and the infrared sensor are connected to the input end of the single-chip microcomputer, an amplifying circuit, a sampling circuit and the filtering circuit are sequentially connected in series between the proximity switch and the single-chip microcomputer, and the filtering circuit comprises an operational amplifier A1, a capacitor C1, a capacitor C2 and a capacitor C3. Thus, sputum can be conveniently stored, and the environment can be protected.
Owner:NANTONG JIUWANG ELECTRONICS

A construction method for double-sided excavation of pilot tunnels in tunnels

A bilateral expanding excavation construction method for a middle pilot tunnel of a tunnel is provided. Section or excavation width of the middle pilot tunnel is generally not larger than that of a common double-line or double-lane tunnel; a step construction method is adopted, and the construction method is the same as that of a common double-line or double-lane tunnel; and the construction method is familiar to constructors, and the construction difficulty is avoided. A primary support section of the middle pilot tunnel can be expanded and excavated after being closed by at least 3 meters; if a side tunnel face is stable, and the problem of the operation height of manual installation of a steel frame and an anchor rod is solved, one-time excavation and support can be achieved, and the construction is more convenient; or otherwise, a side tunnel is excavated according to a two-step or three-step method. The primary support of the middle pilot tunnel can be timely closed; the primary support of the side tunnel and the primary support of the middle pilot tunnel can be completely connected in sequence, and various errors and deformation influences of surrounding rocks and the supportare left at an inverted arch part for treatment; and the construction progress is basically the same as that of the common double-line or double-lane tunnel.
Owner:CHINA RAILWAY 12TH BUREAU GRP +1
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