CN113006813A

CN113006813A - Layout and mechanized rapid construction method for fusing subway station and section in single section

Info

Publication number: CN113006813A
Application number: CN202110266641.1A
Authority: CN
Inventors: 李克金
Original assignee: China Railway 14th Bureau Group Co Ltd
Current assignee: Tiezheng Testing Technology Co ltd
Priority date: 2020-04-01
Filing date: 2021-03-11
Publication date: 2021-06-22
Anticipated expiration: 2041-03-11
Also published as: CN113006813B

Abstract

The invention discloses a layout of fusing subway stations and sections in a single section and a construction step thereof, wherein the layout comprises a large-diameter single-hole tunnel meeting the requirements of double-layer subway tunnel boundaries and station platform station hall building boundaries, and station hall sections meeting the functions of detecting entrance and exit, buffering passenger flow and the like are arranged on two sides of the station section; underground mall sections are arranged on two sides of the station hall layer in an extending mode; the construction method comprises the following steps: adopting a large-diameter shield, and constructing a plurality of sections and stations at one time by using a tunnel boring machine; constructing structures such as a station platform plate and the like at a station part of the large-diameter shield, arranging wires, and performing secondary construction of an in-station structure at the station; constructing city pipe galleries, civil air defense and the like in the surplus space of the tunnel; constructing an internal structure at the main line part of the tunnel; carrying out track laying, electromechanical installation and decoration, joint debugging and joint test and test operation on the line; the construction method has the advantages of small comprehensive influence, high construction speed, high safety factor, less waste projects, good quality guarantee and excellent comprehensive benefit.

Description

Layout and mechanized rapid construction method for fusing subway station and section in single section

Technical Field

The invention relates to the technical field of subway construction, in particular to a layout and mechanized rapid construction method for fusing subway stations and sections in a single section.

Background

The subway is an effective vehicle for solving the congestion of cities, particularly in the busy core areas, the construction of the traditional subway station generally adopts construction methods such as open cut method, cover cut method and/or shallow buried and underground cut method, and various construction methods have the advantages and greatly contribute to the construction of the urban subway, but the various methods also have the following defects:

firstly, various methods have great influence on city image, traffic and business in cities, particularly in core areas; for example, subway stations in an open cut method and a cover cut method generally need to occupy urban road traffic for traffic guidance and improvement, which affects people flows in urban shopping malls, shops and the like, and simultaneously, construction noise, earthwork dust emission, greening migration and the like affect urban residents, and have great long-term influence on urban traffic, commerce, comprehensive image and production and life of people;

secondly, the disassembly, modification and movement cost is huge, the coordination difficulty is huge, and the time consumption is long;

thirdly, the open excavation, the cover excavation of the foundation pit and the underground excavation of the tunnel need measures such as a temporary enclosure structure, precipitation and the like, so that the cost is high;

fourthly, the noise and environmental protection are greatly influenced, and meanwhile, the construction is greatly influenced by the weather influence on the construction period;

fifthly, labor consumption is intensive, and the degree of mechanization is low;

sixthly, the conversion of the process and the working procedure is complicated, and the shield machine needs to start and receive for many times;

seventhly, the safety risk is high, and collapse is easy to happen; the quality of water resistance, concrete and the like is not easy to ensure;

in addition, because the reinforced concrete structure is basically constructed on site, the operation condition and the environment are limited, the water resistance and the concrete quality are extremely difficult to ensure, the quality is easy to be unstable, the concrete strength is insufficient, the honeycomb pitted surface and the water leakage are serious, and great hidden danger is brought to safe operation.

Because the existing subway construction process has the problems, the development of a subway construction method which has small comprehensive influence on the image of the existing city, high construction speed, high safety factor, less waste projects, good quality assurance and excellent comprehensive benefits is a problem which needs to be solved urgently by technical personnel at present.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a layout and mechanized rapid construction method for fusing subway stations and sections in a single section.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a layout fusing subway stations and sections in a single section comprises a large-diameter single-hole tunnel meeting the requirements of double-layer subway tunnel boundaries and station platform station hall building boundaries, and station hall sections meeting the functions of detecting access, buffering passenger flow and the like are arranged on two sides of a station section; underground mall sections are arranged on two sides of the station hall layer in an extending mode;

arranging a vertical supporting wall, a transverse partition plate, a train limit and a safety shielding door in the large-diameter single-hole tunnel, separating an uplink line and a downlink line, respectively arranging station platforms on the uplink line and the downlink line, wherein the upper side of each station platform is a personnel moving layer, the personnel moving layer is a station platform layer, a station hall layer, a city pipe gallery layer, a civil air defense layer or a market layer, the lower side of each station platform is a pipeline layer, and the lower part of a downlink train is a lower-layer track bed;

an entrance and an air shaft are arranged in a relatively open area; set up interface channel between tunnel and access & exit, ventilating shaft, the people's air defense, set up ascending and descending line contact passageway in the tunnel, reserve the door opening through upper portion partition wall, the hole is reserved to the horizontal baffle sets up the step ladder, and the door opening is reserved to the lower part knee wall, combines ascending and descending line evacuation platform, with ascending and descending line UNICOM, realizes emergent evacuation function.

The station platform plate is provided with a lifting maintenance door device, the lifting maintenance door device comprises a long strip groove arranged on the station platform plate, a lifting plate is arranged in the long strip groove, one end of the lifting plate is hinged in the long strip groove, the other end of the lifting plate is connected with a first steel wire rope, the first steel wire rope is controlled by a winch to stretch, the winch is arranged in the station platform plate, a guardrail device is arranged on the station platform plate and corresponds to the position around the long strip groove, the guardrail device comprises an immersion groove arranged on the station platform plate, one end of the immersion groove is hinged with a U-shaped frame, the U-shaped frame comprises a first cross rod hinged in the immersion groove, two ends of the first cross rod are respectively provided with a first vertical rod vertical to the first cross rod, the upper end of the first vertical rod is hinged with a longitudinal rod, the other end of the longitudinal rod is hinged with a second vertical rod, the bottom of the second vertical rod is hinged in the immersion groove, wherein, a second cross rod is further installed between the two first vertical rods, a lockset is installed on the first cross rod, a lock tongue is arranged in the lockset, a first positioning groove and a second positioning groove which are matched with the lock tongue are formed in the immersion groove, the first positioning groove and the second positioning groove are vertically arranged, when the lock tongue is positioned in the first positioning groove, the first vertical rod and the second vertical rod are both in a vertical state, when the lock tongue is positioned in the second positioning groove, the first vertical rod, the longitudinal rod, the second vertical rod and the second cross rod are all positioned in the immersion groove, a linkage unlocking device is further installed on the station bedplate corresponding to the end position of the rotating and lifting of the lifting plate, the linkage unlocking device comprises a rotating shaft, a baffle is arranged at the bottom end of the rotating shaft, a torsion spring is sleeved on the periphery of the rotating shaft, the torsion spring always tends to enable the baffle to rotate to the bottom of the lifting plate, a wire wheel is further arranged at, the transverse plate is hinged with a connecting rod, the other end of the connecting rod is hinged with a T-shaped sliding block, a T-shaped sliding groove matched with the T-shaped sliding block is formed in the platform plate, the T-shaped sliding block is further connected with a second steel wire rope, one end of the second steel wire rope is fixed on the wire wheel, when the first vertical rod is rotated and moved out from the immersion groove, the T-shaped sliding block is gradually close to the direction of the first vertical rod, the wire wheel and the rotating shaft are driven to rotate through the second steel wire rope, and the baffle is enabled to rotate and.

The invention also comprises a mechanized rapid construction method for fusing the layout of the subway station and the subway interval in the single section, which comprises the following steps:

firstly, adopting a large-diameter shield meeting the requirements of double-layer subway tunnel boundary and station platform and station hall building boundary, and constructing a plurality of intervals and stations at one time by using a tunnel boring machine;

secondly, constructing a station platform plate, a support wall and a diaphragm plate structure at the station part of the large-diameter shield, arranging wires on an up line and a down line of the station and a platform hall of the station in one layer respectively, and performing secondary construction on an in-station structure in the station;

constructing city pipe gallery, civil air defense, mall, wind pavilion, access and connecting channel in the surplus space of the tunnel;

fourthly, constructing an internal structure at the main line part of the tunnel to separate the upper line from the lower line;

fifthly, laying rails, mounting and finishing electromechanics, debugging and commissioning.

Preferably, in the first step, when the ground environment of the section and the station is severe in the construction process, a tunnel boring machine construction meeting the requirements of a double-track subway tunnel boundary and a station platform and station hall building boundary is adopted, the type selection design of the tunnel boring machine is carried out by combining geological hydrology and line type before the construction, a site capable of providing initial construction of the tunnel boring machine and arranging supporting equipment is selected as an initial site of the tunnel boring machine, a site capable of providing receiving construction of the tunnel boring machine is selected as a receiving point of the tunnel boring machine, the tunnel boring machine construction adopts a prefabricated segment lining structure to assemble a tunnel or a secondary lining tunnel, and special lining rings of overground and underground connecting channels such as a connecting channel, a civil air defense, a wind shaft and an entrance and exit are reserved.

Preferably, in the step I, a tunnel boring machine with an excavation section of 32-314 square meters is adopted for construction or mining construction, and the tunnel boring machine comprises a shield, a TBM (tunnel boring machine), a cantilever type tunnel boring machine or a pipe jacking machine.

Preferably, before construction in the first step, the model selection design of the tunnel boring machine is combined with geological hydrology and line type, and scraper or tearing cutter is configured for a soft soil stratum cutter head by the geological hydrology;

selecting an earth pressure balance shield machine or a top pipe for a bedrock stratum when the geological hydrology is sewage pebbles;

selecting a slurry balance shield machine or a top pipe for the bedrock stratum when the geological hydrology is water-rich pebbles;

the small curve radius route of the bedrock stratum is actively hinged, and the earth pressure balance shield machine with a narrow starting place is selected.

Preferably, in the second step, the length of the platform is set according to the passenger flow and the train specification, and the method specifically comprises the following steps:

according to the passenger flow prediction, calculating the unidirectional maximum section passenger flow at peak hour;

selecting the vehicle model according to the passenger flow of the one-way maximum section in peak hours, and making a vehicle marshalling scheme;

the platform length is determined according to a vehicle grouping scheme.

Preferably, in the second step, the tunnel is divided into an upper layer and a lower layer by a diaphragm plate, the upper layer and the lower layer are respectively used as a driving up-going line and a driving down-going line, the train stopping position is a platform, station halls are arranged on two sides of the tunnel in an extending mode, and the length of the two sides of the tunnel is not more than the length of a section main line.

Preferably, when the wiring is arranged in the second step, the wiring type comprises one or more of a return line, a parking line, a stop line, a crossover line, safety, a tie line and an access line;

the station structure in the second step is implemented according to the functional area, and specifically comprises a station plate, a support wall, a partition wall, an air duct, a fireproof door, an evacuation channel, a fire pool, a step ladder, an escalator, an elevator, a shielding door, a central air-conditioning room, an automatic ticket checking system and a comprehensive monitoring system.

Preferably, the arrangement of the connecting channels in the step III needs to be matched with the upper line, the lower line and the transverse partition plate, the clear distance between the positions of the connecting channels and the tail end of the station platform is not more than 600 meters, if a plurality of connecting channels exist in the interval, the clear distance between the connecting channels is not more than 600 meters, the connecting channels and the evacuation platform are on the same side, holes are reserved on the side edge of the transverse partition plate, the width of the connecting channels is not less than 1.5 meters, and the upper line and the lower line are connected with the step ladder.

Compared with the prior art, the invention has the following advantages:

firstly, the comprehensive influence is small: the construction method can greatly reduce the early-stage work of house removal, pipeline removal, traffic diversion and the like, reduce the comprehensive influence on the urban image and the citizen life caused by subway construction, and realize obvious economic and social benefits;

secondly, the construction speed is fast: by adopting the tunnel excavator, the operation efficiency can be obviously improved, the frequent times of starting, arriving, dismantling and installing of the shield in the existing construction method are reduced, the construction period is shortened, the early-stage work such as house dismantling, traffic diversion, pipeline diversion and the like can be reduced, and the construction period is greatly shortened;

thirdly, the safety factor is high: the method has high degree of mechanization, can greatly reduce the use of labor force, comprises the steps of tunnel excavation, supporting and grouting which are completed by a shield machine, has higher safety factor than the traditional construction method, and is not easily influenced by severe weather such as high temperature and severe summer heat, severe cold and wind frost, rain and snow and the like because most of construction is underground;

fourthly, fewer waste projects: the foundation pit enclosure structure in the traditional construction method has high cost, only plays a role of temporary supporting in the excavation process of the foundation pit, and part of enclosure pile walls (such as anchor rods, cables and the like) can even become barriers of other projects;

fifthly, the quality is guaranteed well: because most of reinforced concrete structures in the traditional construction method are constructed on site, the operation conditions are greatly influenced by the environment, the concrete quality is difficult to ensure, insufficient concrete strength, honeycomb pitted surface and serious water leakage are easy to occur, and great potential safety hazard is brought to operation;

sixthly, the comprehensive benefits are excellent: the construction method can greatly reduce the early working expenses of house removal, pipeline removal, traffic guidance improvement and the like, quicken the construction period, save the capital cost, increase the volume of underground space development, serve as a comprehensive pipe gallery, a parking garage, a civil air defense space or/and an underground mall and the like, obtain economic benefits, reduce the influence of construction on the infrastructure such as traffic, pipelines and the like and the urban image and have good social benefits.

Drawings

FIG. 1 is a schematic view of a single-section fusion subway station and section in a layered and segmented manner;

FIG. 2 is a schematic cross-sectional view of a single-section fusion subway station and section;

FIG. 3 is a schematic view of a single-section fusion subway station and ground communication section;

FIG. 4 is a schematic view of a single cross-section fused between a subway station and a tunnel in an interval;

FIG. 5 is a schematic view of the station deck of FIG. 2 with a lift service door assembly;

FIG. 6 is an enlarged view of view A of FIG. 5;

FIG. 7 is a view from the B-B direction in FIG. 6;

FIG. 8 is an enlarged partial view of I of FIG. 7;

FIG. 9 is an enlarged view of the view shown in FIG. 7 from direction C-C;

FIG. 10 is a schematic view of the lifter plate in a stowed position;

FIG. 11 is a schematic three-dimensional view of the lift plate lowered to a transverse divider plate;

fig. 12 is a schematic three-dimensional structure of the lifter plate when closed.

Reference numerals: 1 station platform section, 2 station hall section, 3 underground mall section, 4 personnel's active floors, 5 station platforms, 6 pipeline layers, 7 transverse separation board, 8 train limitations, 9 safety shielding door, 10 vertical supporting wall, 11 lower-layer track bed, 12 access & exit, 13 air shaft, 14 connecting channel, 15 upper partition wall reserved door opening, 16 ascending and descending line evacuation platform, 17 step, 18 lower supporting wall reserved door opening 19 rectangular groove 20 lifter plate 21 first wire rope 22 windlass 23 immersion groove 24 first cross bar 25 first vertical bar 26 longitudinal bar 27 second vertical bar 29 spring bolt 30 first positioning groove 31 second positioning groove 32 rotation axis 33 baffle 34 torsion spring 35 wire wheel 36 cross plate 37 connecting rod 38T type slider 39T type spout 40 second wire rope 41 tool to lock.

Detailed Description

The invention aims to provide a layout and mechanized rapid construction method for fusing subway stations and sections in a single section, which is realized by the following technical scheme:

a layout fusing subway stations and sections in a single section comprises a large-diameter single-hole tunnel meeting the requirements of double-layer subway tunnel boundaries and station platform station hall building boundaries, and station hall sections meeting the functions of detecting access, buffering passenger flow and the like are arranged on two sides of a station section; underground mall sections are arranged on two sides of the station hall layer in an extending mode; the range of the major diameter is 10-20 meters, preferably 10-15 meters;

Preferably, in the step I, a tunnel boring machine meeting the requirements of a two-line subway tunnel boundary and a station platform station hall building boundary is adopted, the tunnel boring machine selects a subway boundary specification meeting upper and lower layered operation of two trains of subways, the subway boundary is divided into a vehicle boundary, an equipment boundary and a building boundary, the vehicle boundary is divided into an interval vehicle boundary and a vehicle boundary in the platform calculation length, the building boundary executes a circular tunnel building boundary, and the calculation of the size of each boundary executes a subway design specification GB 50157-2013; the construction method is characterized in that a tunnel boring machine with an excavation section of 32-314 square meters is adopted for construction or the construction is carried out by adopting a mining method, and the tunnel boring machine comprises a shield, a TBM (tunnel boring machine), a cantilever type tunnel boring machine or a pipe jacking machine.

Preferably, a site which can provide the initial construction of the tunnel boring machine and the arrangement of matched equipment is selected as an initial station of the tunnel boring machine, and a station which can provide the receiving construction of the tunnel boring machine is selected as a receiving station of the tunnel boring machine.

when the section passenger flow volume is less than or equal to 37800 at the peak hour in the long term, the vehicle model is 6B type;

when the section passenger flow volume is 37800-48200 at the peak hour in the long term, the vehicle model is 6A type;

when the peak hour cross section passenger flow at the long term is 50700-64300, the vehicle model is 8A type;

when the peak hour section passenger flow in the long term is 48200 ~ 50700, the vehicle model is 8B type.

The platform length is determined according to a vehicle grouping scheme.

When the vehicle marshalling scheme is 6A type, the platform length is 132 meters;

when the vehicle marshalling scheme is the 8A type vehicle, the platform length is 176 meters;

when the vehicle marshalling scheme is 6B type vehicle, the platform length is 114 meters;

when the vehicle grouping scheme is type 8B, the platform length is 152 meters.

Preferably, when the wiring is configured in the step two, the configuration needs to be performed in combination with the platform, the station hall and the layout of each channel, and the method mainly includes: the subway train management system is characterized in that large and small traffic routes are organized to run, a part of trains are organized to run according to the small traffic routes in a certain area in a turn-back mode, a turn-back line and a transfer line are arranged at a turn-back station, a train storage line is arranged if necessary, the vehicle circulation rate during normal running of the subway is improved, the operation organization is more economical and reasonable, the overall driving organization of the subway can be scientifically adjusted under the emergency condition, the potential of subway equipment facilities is furthest exerted, and the running benefit is improved. The wiring type comprises one or more of a return line, a parking line, a stop line, a crossover line, safety, a tie line and an entrance and exit line.

Preferably, the structure in the station in the second step is implemented according to a functional area, and specifically comprises a station board, a support wall, a partition wall, an air duct, a fireproof door, an evacuation channel, a fire pool, a step ladder, an escalator, an elevator, a shielding door, a central air-conditioning room, an automatic ticket checking system and a comprehensive monitoring system.

Preferably, a relatively open position is selected in combination with ground conditions, facilities such as an access, a wind pavilion and a civil air defense communication port are arranged in combination with ground urban landscapes, and the specific requirements are as follows:

A. the wind pavilion is arranged outside a red line of a road as much as possible in a wide and air-circulation place, the ventilation opening is not over against a door and a window of an adjacent building, the air outlet of the wind pavilion is more than 5 meters away from the adjacent building and is matched with civil air defense, and the position of an air inlet channel in wartime is considered;

B. the arrangement of the entrances and exits is combined with the arrangement of ground buildings around the station, the entrances and exits are arranged in places with more distributed people, the entrances and exits can be built together with underground passages, and meanwhile, the width of a red line of a road and the arrangement of traffic facilities around the road are combined, the requirement of special people is considered, the width ensures the requirement of passenger flow, and a plurality of entrances and exits can be arranged;

C. the clear width of a door opening of a civil air defense communication port is not less than 1.5 m, the door opening is preferentially arranged at the passage part of an entrance and an exit, and the door opening is close to civil air defense projects along a station as much as possible and must be arranged in a protective clean area;

D. and after the facility ground is used as an enclosure structure by adopting processes of enclosure piles, open caisson and the like, and the enclosure structure is excavated, a concrete construction structure is cast in situ. After reinforcement measures such as grouting, pipe shed and freezing are carried out in the tunnel, the reserved special lining ring of the tunnel is manually removed, the tunnel is excavated by adopting a mining method, and a cast-in-place concrete structure is constructed as a connecting channel between the tunnel and an access, a wind pavilion, a civil air defense communication port and the like.

Preferably, under the condition that the construction of the tunnel interconnecting channel structure is not influenced, the vertical support wall, the transverse partition plate and the partition wall are sequentially constructed by combining layout structures such as train operation limits, fire fighting, water and electricity, evacuation channels and the like by adopting a reinforced concrete cast-in-place structure, and the upper line and the lower line are separated.

The stations and intervals with severe ground environment mainly refer to the environment with large traffic pressure, numerous pipelines, various ground buildings and structures, great social influence and political influence areas, and no traffic guidance and modification, pipeline movement and modification, building demolition and ground occupation.

The invention is further described with reference to specific examples.

Example 1

A layout fusing subway stations and sections in a single section is shown in figures 1-4 and comprises a large-diameter single-hole tunnel meeting the requirements of double-layer subway tunnel boundaries and station platform and station hall building boundaries, and station hall sections 2 meeting the functions of detecting entrance and exit, buffering passenger flow and the like are arranged on two sides of a platform section 1; underground mall sections 3 are arranged on two sides of the station hall layer in an extending mode;

the method comprises the following steps that a vertical supporting wall 10, a transverse partition plate 7, a train limit 8 and a safety shielding door 9 are arranged in a large-diameter single-hole tunnel, an ascending line and a descending line are separated, a station platform plate 5 is arranged on the ascending line and the descending line respectively, a personnel activity layer 4 is arranged on the upper side of the station platform plate 5, the personnel activity layer 4 can be a station platform layer, a station hall layer, a city pipe gallery layer, a civil air defense layer or a commercial yard layer and the like, a pipeline layer 6 is arranged on the lower side of the station platform plate 5, and a lower layer track bed 11 is arranged on the;

arranging an inlet and an outlet 12 and an air shaft 13 in a relatively open space; connecting channels 14 are arranged among the tunnel, the entrance and exit 12, the air shaft 13 and the civil air defense, uplink and downlink connecting channels are arranged in the tunnel, door openings 15 are reserved through upper partition walls, steps 17 are arranged through reserved holes of transverse partition plates, door openings 18 are reserved through lower supporting walls, and the uplink and downlink evacuation platforms 16 are combined to communicate the uplink and downlink to realize emergency evacuation function.

Example 2

A mechanized rapid construction method for fusing the layout of subway stations and sections in a single section comprises the following steps:

firstly, as shown in figure 1, a large-diameter shield meeting the requirements of a double-layer subway tunnel boundary and a station platform and station hall building boundary is adopted, and a tunnel boring machine is used for constructing a plurality of intervals and stations at one time;

selecting a subway limit rule meeting the upper and lower layered operation of two trains of subway trains by the tunnel boring machine; the subway boundary comprises a vehicle boundary, an equipment boundary and a building boundary, wherein the vehicle boundary comprises an interval vehicle boundary and a vehicle boundary in the platform calculation length, the building boundary executes a circular tunnel building boundary, and the calculation of the size of each boundary executes subway design specification GB 50157-2013. Combining boundary requirements, adopting a shield machine with the excavation diameter of 10-15 meters to construct a single-hole tunnel, constructing a plurality of sections and stations at one time, and arranging a station section 1;

secondly, constructing structures such as a station platform plate 5, a transverse partition plate 7, a vertical support wall 10 and the like at a station part of the large-diameter shield, distributing lines on an up line and a down line of the station and a platform and station hall in one layer respectively, and constructing an internal secondary structure at the station;

In the first step, a tunnel boring machine which meets requirements is adopted for construction in an interval and a station with severe ground environment, the tunnel boring machine is subjected to model selection design in combination with geological hydrology and line type before construction, a site which can provide initial construction and arrangement of supporting equipment of the tunnel boring machine is selected as an initial site of the tunnel boring machine, a site which can provide receiving construction of the tunnel boring machine is selected as a receiving point of the tunnel boring machine, the tunnel or a secondary lining tunnel is assembled by adopting a prefabricated segment lining structure in the construction of the tunnel boring machine, and special lining rings of ground and underground connecting channels such as a connecting channel, a civil air defense, a wind shaft, an entrance and the like are reserved.

The single-hole tunnel comprises the following concrete construction steps:

(1) selecting proper tunneling equipment by combining external factors such as geological hydrology, interval length, surrounding environment and the like;

(2) completing the main structure of the starting station, setting a hoisting well of tunnel boring machine equipment, arranging an equipment starting base and a counterforce device, and completing equipment assembly and debugging work on the starting base;

(3) finishing the reinforcement of soil body around the starting tunnel portal and precipitation construction, wherein the length of the reinforced soil body is not less than the length of equipment, and the height of the precipitation water level is not higher than the center line of the tunnel, chiseling the enclosure structure within the starting tunnel portal range, and having starting conditions;

(4) before tunnel construction, prefabricating tunnel segments or pipe rings by using reinforced concrete, embedding grouting holes, hoisting holes, bolt connecting holes and other required embedded parts, and maintaining and inspecting;

(5) tunneling equipment starts tunneling, soil is jacked forwards through a negative ring segment or a pipe ring, a cutter head in front of the equipment rotates to cut soil, muck in a soil bin is discharged to the rear of the tunneling equipment through a spiral conveyor or a slurry pump in a shield body, or the muck is conveyed into a muck truck through a belt conveyor arranged in the tunneling equipment, then conveyed into a vertical shaft outside a tunnel through the muck truck, transferred into a ground muck storage pool through vertical conveying equipment (such as a gantry crane and the like) and then conveyed to a waste soil site through the muck truck;

(6) the horizontal transportation in the tunnel can adopt temporary rails to carry out rail horizontal transportation, the vehicle can adopt an electric locomotive, a storage battery supplies power for the locomotive, and the pollution-free electric locomotive can reduce the air pollution in the tunnel;

(7) during the tunneling of the tunneling equipment, fresh air is provided for the operation of operating personnel and equipment in the tunnel through a ventilator arranged at a wellhead and an air belt arranged in the tunnel; the power and water supply facilities and the connecting pipelines arranged on the ground are used for supplying power and water to the equipment in the tunnel, so that the running requirement of the equipment is met;

(8) the method comprises the following steps of completing tunneling construction with a certain length (determined according to the length of a pipe link), splicing the pipe pieces into a ring through a splicing device configured by tunneling equipment, connecting and fixing the pipe pieces through pipe piece bolts, and arranging waterproof materials in transverse and longitudinal gaps of the pipe pieces to realize a tunnel waterproof function;

(9) the segment is transported to a tunneling device in groups through a horizontal transport vehicle, and finally transported to the lower part of an assembler through a segment crane, a transfer crane, a segment transport trolley and the like configured by the device, wherein the segment assembler has the grabbing and lifting capacity, so that the assembly of the segments is realized;

(10) assembling special lining segments (such as steel pipe segments, small blocks are connected and are convenient to remove) at the positions corresponding to the communication channels, and grouting reinforcement and excavation construction of the communication channels are facilitated;

(11) after all tunnel construction is completed, receiving, disassembling and hoisting out the tunnel tunneling equipment in a receiving well; and receiving the reinforcement and precipitation construction requirements of the well and the initial requirements.

The step of setting the length of the station includes:

A. and (4) passenger flow prediction, namely predicting the total number of passengers on the whole line according to the surrounding environment, buildings, population distribution and road traffic of the subway station, and calculating the unidirectional maximum cross-section passenger flow at peak hour according to the proportion of the switched-in passenger flow, the passenger flow intensity, the early peak passenger flow and the peak hour coefficient.

B. And selecting the vehicle model according to the traffic volume of the section of the long-term peak hour, and making a vehicle grouping scheme.

C. The platform length is determined according to a vehicle grouping scheme.

As shown in fig. 1, in combination with the length of the tunnel between the sections and the needs of commercial development, underground mall sections 3 are extended from both sides of the station hall layer, and the extended length is not more than 500 m, so that the normal use of the connecting channel is not affected.

As shown in fig. 2, adopt the cast-in-place structure of reinforced concrete in station position major diameter tunnel, successively do vertical knee wall 10, horizontal division board 7, the division wall separates the ascending and descending line, sets up personnel's activity layer 4, specifically includes upper platform, station room layer and lower floor's platform, station room layer etc. and the setting of distributing wire, the station carries out inside secondary structure construction, and specific construction steps are as follows:

1) the bottom of the tunnel is filled with concrete in a pouring way, and a vertical supporting wall or a reinforcing steel bar net rack of a supporting column is pre-embedded; pre-burying sleepers of the descending line train;

2) constructing a vertical supporting wall and a supporting column, wherein the height of the vertical supporting wall and the supporting column is equal to the ground height of the transverse partition plate, the supporting column, the supporting wall steel bars and the transverse partition plate steel bars are anchored together, and reserving a door opening at the position corresponding to the communication channel when constructing the supporting wall;

3) the middle part of the reinforced concrete cast-in-place transverse partition plate is connected with a support column and a wall, the two ends of the reinforced concrete cast-in-place transverse partition plate are connected with duct pieces, the steel bars can be connected by adopting embedded bars, the upper part of the partition wall steel bars are reserved above the support plate, and an upper line sleeper connecting piece is embedded in the transverse partition plate;

4) constructing an upper partition wall, wherein the thickness of the wall body meets the basic requirement of wind isolation, and reserving a door opening corresponding to the position of the communication channel;

5) constructing an up-down line evacuation platform;

6) installing up and down line rails, sleepers, switches, contact networks, power supply, ventilation, signals, fire-fighting pipeline supports and facilities.

As shown in fig. 2, performance indexes such as strength of the transverse partition plate 7 should meet load requirements of trains, tracks, equipment and the like, and upper and lower pipelines, channels, air duct connecting holes and the like are reserved locally; the layout of the vertical support wall 10 meets the requirements of platform space, support middle partition plate and upper load.

As shown in fig. 3, in combination with the ground conditions, the arrangement of the doorway 12, the air shaft 13 and the like in a relatively open area is selected, and the basic requirements are as follows:

1) the wind pavilion is arranged outside a red line of a road as much as possible in a wide and air-circulation place, the ventilation opening is not over against a door and a window of an adjacent building, the air outlet of the wind pavilion is more than 5 meters away from the adjacent building and is matched with civil air defense, and the position of an air inlet channel in wartime is considered;

2) the arrangement of the entrances and exits is combined with the arrangement of ground buildings around the station, the entrances and exits are arranged in places with more distributed people, the entrances and exits can be built together with underground passages, and meanwhile, the width of a red line of a road and the arrangement of traffic facilities around the road are combined, the requirement of special people is considered, the width ensures the requirement of passenger flow, and a plurality of entrances and exits can be arranged;

3) the clear width of a door opening of a civil air defense communication port is not less than 1.5 m, the door opening is preferentially arranged at the passage part of an entrance and an exit, and the door opening is close to civil air defense projects along a station as much as possible and must be arranged in a protective clean area;

4) and after the facility ground is used as an enclosure structure by adopting processes of enclosure piles, open caisson and the like, and the enclosure structure is excavated, a concrete construction structure is cast in situ.

As shown in fig. 3, the ground communication structures such as the access and the air shaft firstly adopt the processes of constructing fender piles, open cut foundation pits of the open cut shaft and the like, and are constructed into underground structures, and the concrete construction steps are as follows:

1) selecting the ground positions of an access and a wind pavilion according to design specifications and design data by combining geological and hydrological exploration data and the ground environment;

2) measuring and lofting, temporarily detaching and moving existing attachments (road facilities, greening and simple public facilities) on the ground, and removing the miscellaneous soil on the ground surface;

3) adopting a retaining pile process adapting to the stratum such as a cast-in-situ bored pile, a steel sheet pile, a precast pile and the like to construct a foundation pit retaining structure;

4) removing pile heads, applying concrete support to form a top layer supporting system, applying a precipitation well to precipitate water in the foundation pit, performing excavation conditions, excavating earthwork by using construction machinery such as an excavator, a long-arm excavator, a grab bucket machine and the like, and transporting the earthwork;

5) constructing an access and a wind pavilion structure, wherein the elevation of the underground structure corresponds to the elevation of the position of a reserved communication channel at the tunnel structure, and reserving a hole of the communication channel;

6) after the construction of the communication channel is completed, the installation of the access and exit and the internal facilities of the wind pavilion are carried out, and the main facilities comprise an escalator, an elevator, a step ladder, a civil air defense door, an air channel partition plate, a central air conditioner and a fan.

As shown in fig. 3, after reinforcement measures such as grouting, pipe shed and freezing are carried out in the tunnel, a tunnel and an access 12, an air shaft 13, a civil air defense and other connecting channels 14 are constructed, and the concrete implementation steps of the connecting channels 14 are as follows:

1) reinforcing and water stopping are carried out on the stratum at the communicating passage by combining geological and hydrological conditions and exploration design data, common reinforcing measures comprise small conduit grouting and large pipe shed reinforcing, and if the stratum is stable and has no water, the reinforcing measures can not be adopted;

2) supporting the tunnel pipe ring temporarily by using profile steel, and removing special lining segments at the reserved communication channel;

3) carrying out layered and block excavation, wherein the length of each excavation is not more than 50cm, the length of the initial excavation is not more than 1m, the stability of the tunnel face is periodically checked, after each excavation is finished, the installation and the reinforcement of an arch frame are carried out in time, and a primary support is formed by installing a reinforcing mesh and spraying concrete;

4) continuously reinforcing the next layer of soil body, continuously excavating after the tunnel face is stable, excavating until the tunnel is communicated with the access and the wind pavilion structure, constructing a lining structure of a communication channel, paving a waterproof material between the lining structure and the primary support, and reserving a grouting pipe;

5) the reinforced concrete cast-in-place lining structure is adopted, timely maintenance is carried out after completion, and wall thickness grouting filling water stopping is carried out through the reserved grouting pipe.

As shown in fig. 4, in order to meet the fire emergency requirement, an uplink and downlink communication channel is arranged in the tunnel, a door opening 15 is reserved through an upper partition wall, a step ladder 17 is arranged through a transverse partition reserved hole, a door opening 18 is reserved through a lower support wall, and the uplink and downlink communication channel is communicated by combining an uplink and downlink evacuation platform 16 to realize the emergency evacuation function.

The pipeline layer 6 is internally provided with a routing pipeline which is generally long, if the pipeline layer needs to be replaced, the routing pipeline needs to penetrate from the station platform plate 5 and enter the pipeline layer 6, in order to ensure that the long routing pipeline can enter the pipeline layer 6, the station platform plate 5 is provided with a lifting maintenance door device, as shown in fig. 5, 6 and 7, the lifting maintenance door device comprises a long groove 19 arranged on the station platform plate 5, a lifting plate 20 is arranged in the long groove 19, one end of the lifting plate 20 is hinged in the long groove 19, the other end of the lifting plate 20 is connected with a first steel wire rope 21, the first steel wire rope 21 is controlled to stretch by a winch 22, and the winch 22 is arranged in the station platform plate 5. The winch 22 can control the first steel wire rope 21 to control the lifting plate 20 to rotate to open and close, so that the lifting plate 20 is lowered onto the transverse partition plate 7 to serve as a ladder, the space of the long groove 19 is exposed on the platform plate 5, a maintainer can conveniently carry the wiring pipeline to enter the pipeline layer 6, and when the lifting plate 20 is lifted to seal the long groove 19, the lifting plate 20 can also serve as a part of the platform plate 5 to provide a necessary standing space for passengers.

In order to avoid passengers from entering the position of the long strip groove 19 by mistake when the lifting plate 20 is lowered onto the transverse partition plate 7, a guardrail device is installed on the platform plate 5 corresponding to the position around the long strip groove 19, as shown in fig. 11, the guardrail device comprises an immersion groove 23 arranged on the platform plate 5, one end of the immersion groove 23 is hinged with a U-shaped frame, the U-shaped frame comprises a first cross rod 24 hinged in the immersion groove 23, two ends of the first cross rod 24 are respectively provided with a first vertical rod 25 perpendicular to the first cross rod 24, the upper end of the first vertical rod 25 is hinged with a longitudinal rod 26, the other end of the longitudinal rod 26 is hinged with a second vertical rod 27, and the bottom of the second vertical rod 27 is hinged in the immersion groove 23. Wherein the first upright 25 and the second upright 27 are respectively disposed at two ends of the elongated slot 19, and the first upright 25, the vertical bar 26 and the second upright 27 form a parallelogram mechanism on the platform board 5, which can synchronously swing with each other. A second cross bar 28 is also mounted between the two first uprights 25 to prevent passengers other than the service personnel from falling into the pipe string 6, while there is no connection between the second uprights 27 to facilitate access of the service personnel to the lifting plate 20.

As shown in fig. 8, a lock 41 is installed on the first cross bar 24, a lock tongue 29 is disposed in the lock 41, a first positioning groove 30 and a second positioning groove 31 which are matched with the lock tongue 29 are disposed in the immersion groove 23, wherein the first positioning groove 30 and the second positioning groove 31 are vertically disposed, when the lock tongue 29 is located in the first positioning groove 30, the first upright bar 25 and the second upright bar 27 are both in a vertical state, and when the lock tongue 29 is located in the second positioning groove 31, the first upright bar 25, the longitudinal bar 26, the second upright bar 27 and the second cross bar 28 are all located in the immersion groove 23. The setting of spring bolt 29 and constant head tank is for fixing a position for the guardrail device, like the state shown in fig. 7, for overhauing the operation this moment, and spring bolt 29 is located first constant head tank 30, and first pole setting 25 and second pole setting 27 all are in vertical state, enclose the fender to forming all around of rectangular groove 19. In the non-maintenance state as shown in fig. 10, the locking tongue 29 is located in the second positioning groove 31, and the first vertical rod 25, the vertical rod 26, the second vertical rod 27 and the second horizontal rod 28 are all located in the immersion groove 23 and do not protrude above the station board 5, as shown in fig. 12, so that the influence on passengers in the non-maintenance state is avoided. The lock tongue 29 in the lock 41 can be opened or closed only by a key equipped by the maintenance personnel, so that the misoperation of other personnel is avoided.

In order to ensure that the lifting plate 20 can be opened by the winch 22 after the guardrail device is rotated and opened from the immersion groove 23 to form a fence, a linkage unlocking device is further mounted on the platform plate 5 and comprises a rotating shaft 32, a baffle 33 is arranged at the bottom end of the rotating shaft 32, a torsion spring 34 is sleeved on the periphery of the rotating shaft 32, the torsion spring 34 always tends to enable the baffle 33 to rotate to the bottom of the lifting plate 20, a wire wheel 35 is further arranged at the upper end of the rotating shaft 32, a transverse plate 36 is mounted between the two first vertical rods 25, a connecting rod 37 is hinged on the transverse plate 36, a T-shaped sliding block 38 is hinged at the other end of the connecting rod 37, a T-shaped sliding groove 39 matched with the T-shaped sliding block 38 is formed in the platform plate 5, a second steel wire rope 40 is further connected on the T-shaped sliding block 38, and one end of the second steel wire rope 40 is fixed on the wire wheel, when the first vertical rod 25 rotates out of the immersion groove 23, the T-shaped slider 38 gradually approaches the first vertical rod 25, and the second wire rope 40 drives the pulley 35 and the rotating shaft 32 to rotate, so that the baffle 33 rotates and is separated from the lifting plate 20. That is, if the lifting plate 20 is lowered onto the transverse partition plate 7, the baffle plate 33 can be rotated to be separated from the bottom of the lifting plate 20 only when the guardrail device is rotated to be opened from the immersion groove 23 to form a barrier, and the winch 22 can control the lifting of the lifting plate 20.

When the lifting service door apparatus is changed from the state shown in fig. 10 to the state shown in fig. 7, the operations to be performed are as follows: firstly, the locking tongue 29 and the second positioning groove 31 are unlocked, the first upright rod 25 rotates clockwise from the immersion groove 23 in the direction shown in fig. 10 to be opened, the locking tongue 29 extends into the first positioning groove 30, so that the guardrail device forms a barrier around the long groove 19, the first upright rod 25 drives the T-shaped sliding block 38 to move right in the direction shown in fig. 10 through the connecting rod 37 in the process of rotating along the pointer, the second steel wire rope 40 is pulled to overcome the acting force of the torsion spring 34 to enable the wire wheel 35 to rotate along the pointer in the direction shown in fig. 9, the baffle 33 is further driven to rotate to be separated from the bottom of the lifting plate 20, and the subsequent winch 22 can control the lifting plate 20 to rotate and open through the first steel wire rope 21. When the lifting maintenance door device needs to be closed, the operation is opposite to the above operation, the lifting plate 20 needs to be rotated and closed first, then the first vertical rod 25 is rotated into the immersion groove 23, and under the action of the torsion spring 34, the baffle 33 is rotated to the bottom of the lifting plate 20 again, so that the vertical limit is performed on the lifting plate, and the state shown in fig. 10 is recovered.

Claims

1. The utility model provides a fuse subway station and interval overall arrangement in single section which characterized in that: the large-diameter single-hole tunnel meeting the requirements of double-layer subway tunnel boundaries and station platform and station hall building boundaries is included, and station hall sections (2) meeting the functions of detecting entrance and exit and buffering passenger flow are arranged on two sides of a station section (1); underground mall sections (3) are arranged on two sides of the station hall layer in an extending manner;

the method comprises the following steps that a vertical supporting wall (10), a transverse partition plate (7), a train limiting plate (8) and a safety shielding door (9) are arranged in a large-diameter single-hole tunnel, an ascending line and a descending line are separated, a station platform plate (5) is arranged on the ascending line and the descending line respectively, a personnel activity layer (4) is arranged on the upper side of the station platform plate (5), the personnel activity layer (4) is a station platform layer, a station hall layer, a city pipe gallery layer, a civil defense layer or a market layer, a pipeline layer (6) is arranged on the lower side of the station platform plate (5), and a lower layer track bed (11) is arranged on;

arranging an access (12) and an air shaft (13) in a relatively open space; set up between tunnel and access & exit (12), ventilating shaft (13), the people's air defense and connect passageway (14), set up downlink communication channel in the tunnel, reserve door opening (15) through upper portion partition wall, horizontal baffle reservation hole sets up step ladder (17), and door opening (18) are reserved to the lower part knee wall, combine uplink and downlink evacuation platform (16), with uplink and downlink UNICOM, realize emergent sparse function.

2. The layout for fusing subway stations and sections in a single section according to claim 1, characterized in that: the station platform plate (5) is provided with a lifting maintenance door device, the lifting maintenance door device comprises a long strip groove (19) arranged on the station platform plate (5), a lifting plate (20) is arranged in the long strip groove (19), one end of the lifting plate (20) is hinged in the long strip groove (19), the other end of the lifting plate (20) is connected with a first steel wire rope (21), the first steel wire rope (21) is controlled to stretch and retract by a winch (22), the winch (22) is arranged in the station platform plate (5) and corresponds to the positions around the long strip groove (19), a guardrail device is arranged on the station platform plate (5) and comprises an immersion groove (23) arranged on the station platform plate (5), one end of the immersion groove (23) is hinged with a U-shaped frame which comprises a first cross rod (24) hinged in the immersion groove (23), the two ends of the first cross rod (24) are respectively provided with a first vertical rod (25) perpendicular to the first cross rod (24), the upper end of the first vertical rod (25) is hinged with a longitudinal rod (26), the other end of the longitudinal rod (26) is hinged with a second vertical rod (27), the bottom of the second vertical rod (27) is hinged in the immersion groove (23), the first vertical rod (25) and the second vertical rod (27) are respectively arranged at two ends of the strip groove (19), a second cross rod (28) is further arranged between the two first vertical rods (25), a lock (41) is arranged on the first cross rod (24), a lock tongue (29) is arranged in the lock (41), a first positioning groove (30) and a second positioning groove (31) which are matched with the lock tongue (29) are arranged in the immersion groove (23), the first positioning groove (30) and the second positioning groove (31) are vertically arranged, when the lock tongue (29) is positioned in the first positioning groove (30), the first vertical rod (25) and the second vertical rod (27) are both in a vertical state, and the lock tongue (29) is positioned in the second positioning groove (31), the first vertical rods (25), the longitudinal rods (26), the second vertical rods (27) and the second transverse rods (28) are all located in the immersion groove (23), corresponding to the end position of the lifting plate (20) rotating to lift, a linkage unlocking device is further installed on the station plate (5), the linkage unlocking device comprises a rotating shaft (32), a baffle (33) is arranged at the bottom end of the rotating shaft (32), a torsion spring (34) is sleeved on the periphery of the rotating shaft (32), the torsion spring (34) always tends to enable the baffle (33) to rotate to the bottom of the lifting plate (20), a wire wheel (35) is further arranged at the upper end of the rotating shaft (32), a transverse plate (36) is installed between the two first vertical rods (25), a connecting rod (37) is hinged to the transverse plate (36), a T-shaped sliding block (38) is hinged to the other end of the connecting rod (37), and a T-shaped sliding groove (39) matched with the T-shaped sliding, the T-shaped sliding block (38) is further connected with a second steel wire rope (40), one end of the second steel wire rope (40) is fixed to the wire wheel (35), when the first vertical rod (25) rotates and moves out of the immersion groove (23), the T-shaped sliding block (38) gradually approaches to the direction of the first vertical rod (25), the wire wheel (35) and the rotating shaft (32) are driven to rotate through the second steel wire rope (40), and the baffle (33) rotates and is separated from the lifting plate (20).

3. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway station within a single section as claimed in claim 1, is characterized in that: the method comprises the following steps:

4. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that: in the first step, when the ground environment of an interval and a station is severe in the construction process, a tunnel boring machine which meets the requirements of a double-track subway tunnel boundary and a station platform and station hall building boundary is adopted for construction, the type selection design of the tunnel boring machine is carried out by combining geological hydrology and line type before construction, a field which can provide initial construction of the tunnel boring machine and arrangement of matched equipment is selected as an initial station of the tunnel boring machine, a station which can provide receiving construction of the tunnel boring machine is selected as a receiving point of the tunnel boring machine, the tunnel or a secondary lining tunnel is assembled by adopting a prefabricated segment lining structure in the construction of the tunnel boring machine, and special lining rings of overground and underground connecting channels such as a connecting channel, a civil air defense, an air shaft, an entrance and the like are.

5. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that:

the construction method comprises the following steps of firstly, adopting a tunnel boring machine with an excavation section of 32-314 square meters for construction, wherein the tunnel boring machine comprises a shield, a TBM (tunnel boring machine), a cantilever type tunnel boring machine or a pipe jacking machine.

6. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that: before construction, combining geological hydrology and line type to design the model selection of the tunnel boring machine, specifically:

when the geological hydrology is soft soil stratum, the cutter head is provided with a scraper or a tearing knife;

selecting an earth pressure balance shield machine or a top pipe when the geological hydrology is a sewage pebble time-based rock stratum;

selecting a slurry balance shield machine or a jacking pipe when the geological hydrology is a water-rich pebble time-based rock stratum;

7. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that: step two, the length of the platform is set according to the passenger flow and the train specification, and the method specifically comprises the following steps:

the platform length is determined according to a vehicle grouping scheme.

8. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that: and in the second step, the tunnel is divided into an upper layer and a lower layer through a diaphragm plate, the upper layer and the lower layer are respectively used as a driving uplink line and a driving downlink line, the train stopping position is a platform, station halls are arranged on two sides of the tunnel in an extending mode, and the length of the two sides of the tunnel is not more than the length of a section main line.

9. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that: when wiring is set in the second step, the wiring type comprises one or more of a return line, a parking line, a stop line, a crossover line, safety, a tie line and an access line;

the station structure is implemented according to a functional area and specifically comprises a station plate, a support wall, a partition wall, an air duct, a fireproof door, an evacuation channel, a fire pool, a step ladder, a staircase, an elevator, a shielding door, a central air-conditioning room, an automatic ticket checking system and a comprehensive monitoring system.

10. The mechanized rapid construction method for the layout of the fusion subway station and the fusion subway zone in the single section according to claim 3, is characterized in that: and step three, the arrangement of the connecting channels needs to be matched with the upper and lower lines and the transverse partition plates, the clear distance between the positions of the connecting channels and the tail end of the station platform is not more than 600 meters, if a plurality of connecting channels exist in the interval, the clear distance between the connecting channels is not more than 600 meters, the connecting channels and the evacuation platform are on the same side, holes are reserved on the side edges of the transverse partition plates, the width of the connecting channels is not less than 1.5 meters, and the upper and lower lines are arranged to be connected with the step ladder.