CN106567717B - It is a kind of to double as construction access ramp structure and construction method using subway entrance - Google Patents

It is a kind of to double as construction access ramp structure and construction method using subway entrance Download PDF

Info

Publication number
CN106567717B
CN106567717B CN201510649961.XA CN201510649961A CN106567717B CN 106567717 B CN106567717 B CN 106567717B CN 201510649961 A CN201510649961 A CN 201510649961A CN 106567717 B CN106567717 B CN 106567717B
Authority
CN
China
Prior art keywords
construction
station
entrance
access ramp
tunneling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201510649961.XA
Other languages
Chinese (zh)
Other versions
CN106567717A (en
Inventor
贺维国
宋超业
赵晋友
金若翃
毕经东
刘鹏
田峰
段悟哲
汤浩杰
李�浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Liuyuan Group Co Ltd
Original Assignee
China Railway Liuyuan Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway Liuyuan Group Co Ltd filed Critical China Railway Liuyuan Group Co Ltd
Priority to CN201510649961.XA priority Critical patent/CN106567717B/en
Publication of CN106567717A publication Critical patent/CN106567717A/en
Application granted granted Critical
Publication of CN106567717B publication Critical patent/CN106567717B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention belongs to urban track traffic technique of design and construction fields, more particularly to a kind of utilization subway entrance is as construction access ramp structure and construction method, it is characterized in that, high section composition construction access ramp structure is chosen including open cut open-mouth section, tunneling slope section, people's air defense flat segments and entering the station, access ramp of constructing utilizes subway port structure, using Tunnel structure as construction access ramp bearing structure, construction in later period secondary lining forms the port structure of subway station;Construction procedure are as follows: (1) excavate access ramp open excavation section;(2) it carries out tunneling slope section, people's air defense flat segments and enters the station to choose the tunneling just branch construction of high section;(3) port structure is excavated downwards;(4) mould builds the lining of tunneling section entrance two;(5) backfill and mould build open excavation section port structure;(6) internal structure is applied.The present invention can reduce under the complex environment of city construction and enter the station the risk in channel, guarantee that soil layer and rock stratum big cross section tunneling subway station enter the station construction safety.

Description

It is a kind of to double as construction access ramp structure and construction method using subway entrance
Technical field
The invention belongs to Design of Urban Rail Transit Engineering and technical field of construction, more particularly to one kind is in tunneling subway Stand construction when, in conjunction with the entrance setting construction access ramp structure and corresponding construction method of subway station.
Background technique
Subway station is the important component of urban rail transit construction, since its construction scale is big, investment is high, difficulty of construction The big and time is longer, especially with the subway station of shallow mining method, typically the node control engineering of all fronts.Shallow buried covered excavation Method is favored since it does not influence traffic, do not change shifting pipeline and influences minimum to surrounding enviroment in down town city. With the development of urban rail transit construction, the surrounding enviroment at the position of subway station become increasingly complex, and people protect environment at this stage Shield is also increasingly paid attention to, and shallow mining method subway station often becomes preferential selection.
Since subway station section is bigger, subsurface excavation method is typically all the method for using partial excavation, and the section that becomes larger is small Section, it is step by step cyclic.Common Dryopteris sublaetaChing et Hsu method has middle hole method, side hole method and cavern-pile method etc..No matter being applied using which kind of Work method, will be arranged the construction channel into Station first, and the construction of entering the station of tunneling at present is all using setting 2~3 The method of construction shaft and construction transverse passage-way.Construction shaft generally utilizes the ventilating shaft at station both ends, and construction channel utilizes station Construction of entering the station is organized in air duct.
Come with some shortcomings using the enter the station method of construction of the conventional tissue using ventilating shaft air duct, be construction efficiency first compared with It is low, especially in lithostratigraphy.Construction shaft is set using ventilating shaft, muck removal and transport of materials require vertical-lift, are arranged Gantry crane or electric block.Meanwhile if station tunnel is in rocky stratum, the intensity of rock mass is much larger than the soil body, tunnel It also needs to take blasting construction method in road excavation construction, the cubic meter of stone after explosion transports more notable influence speed of application.Followed by Construction safety risk is larger, and the general area of ventilating shaft is big, and depth is generally required more than 20m or more when for construction shaft, belongs to depth Foundation pit;While the height for transverse passage-way of constructing is also required to excavate in 16m or so and construction risk is big.That investment is high again, due to by The efficiency of construction shaft and transverse passage-way influences, and a Station generally all needs setting 2 or 3 construction shafts while organizing Construction, just can guarantee construction speed;The lifting system of vertical shaft setting is also a no small spending.It is finally to be applied using subsurface excavation method The surrounding enviroment at work station are generally all more complicated, are sometimes difficult to choose 2~3 suitable construction sites and come organizing construction, Often construction site, which cannot implement just, influences entire project progress.
As can be seen from the above analysis, traditional Station is entered the station construction using construction shaft and construction transverse passage-way tissue Mode, there are construction efficiency is low and the distinct disadvantage that takes up a large area.In conjunction with Shallow Covered Metro Station constructing tunnel mechanics Feature and construction organization mode require, and to improve construction efficiency comprehensively, reduce construction risk and occupied ground, propose a kind of utilization Subway entrance using open cut open-mouth section, tunneling slope section, people's air defense flat segments and enters the station as construction access ramp structure and chooses high section Segmentation composition realizes the construction of quickly entering the station of soil property or lithostratigraphy shallow buried covered excavation big cross section metro station tunnel.
Summary of the invention
The purpose of the present invention is overcome above-mentioned traditional Shallow Covered Metro Station to enter the station construction shaft and transverse passage-way organizer Deficiency present in formula, it is ensured that soil layer and rocky stratum big cross section metro station tunnel enter the station the safety of construction, provide a kind of benefit With subway entrance as construction access ramp structure and the construction method to enter the station, which has structure type and engineering method technique letter Single, into horizontal transport, haulage vehicle can be directly entered station main body construction, convenient and quick construction for change vertical-lift, and raising is applied Work efficiency rate, and channel of constructing is arranged in conjunction with entrance, and a construction access ramp is arranged and had both been able to satisfy station construction requirement, reduction is applied Work land occupation, saves project cost.
The technical scheme adopted by the invention is as follows:
It is a kind of to double as construction access ramp structure using subway entrance, which is characterized in that oblique including open cut open-mouth section, tunneling It slope section, people's air defense flat segments and enters the station and chooses high section, the open cut open-mouth section, tunneling slope section, people's air defense flat segments and enter the station and choose high section It is sequentially connected logical formation construction access ramp structure.
The construction access ramp utilizes subway port structure, and construction period is using Tunnel structure as construction Access ramp bearing structure, construction in later period secondary lining form the port structure of subway station;The clear span of construction access ramp uses Two lining structure width of port structure, the clear span >=4.5m for access ramp of constructing;The clear height of construction access ramp uses entrance knot Two lining structure height of structure, the clear height >=5.0m for access ramp of constructing.
The open cut open-mouth section includes concrete shield top, foundation pit side-wall supporting, base plate of foundation pit bed course, plate brad supporting, open cut Backfill layer, bed course and open cut waterproof layer, entrance concrete structure, the foundation pit side-wall supporting are set to base plate of foundation pit bed course Top two sides, concrete shield top are set to the top of the foundation pit side-wall supporting, and the plate brad supporting is fixed on foundation pit side The outside of wall supporting, open cut backfill layer are filled between the foundation pit side-wall supporting of two sides and base plate of foundation pit bed course, it is described go out Entrance concrete structure is located between the foundation pit side-wall supporting of two sides and its top for being located at open cut backfill layer, the entrance Concrete structure forms open cut exit and entrance, and the bed course and open cut waterproof layer are set to open cut backfill layer, entrance coagulation Between soil structure.
In the open cut open-mouth section, the open cut opening segment length is 25-35m, and the foundation pit side-wall supporting is by fashioned iron, soil Nail, steel mesh and gunite concrete composition, the bed course is close to open cut backfill layer setting, and the open cut waterproof layer is close to entrance Concrete structure setting.
At the beginning of the tunneling slope section includes tunneling advance support, construction channel preliminary bracing structure, later period excavation entrance Branch structure, two lining structure of tunneling slope section, tunneling slope section fill concrete layer, the construction channel preliminary bracing structure setting The top of branch structure, two lining structure of tunneling slope section are set to construction channel initial stage branch at the beginning of excavating entrance in the later period Protection structure, later period excavate the inside of the first branch structure of entrance, offer tunneling slope section in two lining structure of tunneling slope section Channel, the tunneling slope section fill concrete layer are filled in construction channel preliminary bracing structure, two lining structure of tunneling slope section Top between, the tunneling advance support be set to it is described construction channel preliminary bracing structure tip exterior.
In the tunneling slope section, the gradient≤14% that the tunneling slope section longitudinally uses, the tunneling slope section two is served as a contrast Structure and tunneling slope section fill concrete layer, construction channel preliminary bracing structure, later period excavate between the first branch structure of entrance It is provided with the tunneling waterproof layer of perforation, the construction channel preliminary bracing structure is by grid steel frame, steel mesh and gunite concrete Composition, two lining structure of tunneling slope section are reinforced concrete structure.
The people's air defense flat segments include people's air defense advance support, people's air defense preliminary bracing structure, two lining structure of people's air defense and gate stack knot Structure, the people's air defense preliminary bracing structure setting is in the top outer of the people's air defense advance support, two lining structure of the people's air defense setting Antiaircraft tunnel is offered in the inside of the inside of the people's air defense preliminary bracing structure, two lining structure of people's air defense.
It is described to enter the station that choose high section include entering the station and choosing high section advance support, enter the station and choose high section preliminary bracing structure, enter the station and choose height Two lining structures of section enter the station and choose high section fill concrete layer, it is described enter the station to choose high section advance support and be set to enter the station choose high section initial stage The top outer of supporting construction, it is described enter the station to choose high two lining structure of section and be set to described enter the station choose the interior of high section preliminary bracing structure Portion, described enter the station choose the inside of high two lining structure of section and offer channel of entering the station, and described enter the station chooses high section fill concrete layer setting High section preliminary bracing structure is chosen, between the top for choosing high two lining structure of section of entering the station in entering the station.
In the people's air defense flat segments, gate stack structure, the people's air defense are downwardly extending at the top of two lining structure of people's air defense People's air defense waterproof layer is provided between two lining structures, people's air defense preliminary bracing structure;Described enter the station is chosen in high section, and described enter the station chooses high section Two lining structures and enter the station choose high section fill concrete layer, entering the station to choose is provided with the waterproof layer that enters the station between high section preliminary bracing structure, Described enter the station chooses the vault of high section preliminary bracing structure and is raised above station main body vault absolute altitude using the gradient gradual change of 1:3.
A kind of construction method doubling as construction access ramp structure using subway entrance, which is characterized in that according to following step It is rapid to carry out:
(1) open cut open-mouth section foundation pit unwrapping wire positions, and excavates access ramp open cut open-mouth section;Foundation pit side-wall is handled when excavating, It sets plate brad supporting and applies fashioned iron and gunite concrete structure, made when the weakness of stratum using cast-in-situ bored pile+inner support system For foundation pit enclosure structure, base plate of foundation pit cushion layer structure is applied after being excavated to the low absolute altitude of foundation pit;
(2) the tunneling advance support that tunneling access ramp arch is set in foundation pit side-wall uses steel tube shed into hole advance support Or grouting with small pipe;
(3) it carries out tunneling slope section, people's air defense flat segments and enters the station to choose the access ramp boring construction of high section, construction uses step Method is excavated, setting interim inverted arch together in middle part when geological conditions is poor or monitoring needs, the first branch structure construction of entrance access ramp Key step are as follows: advance support ductule or anchor pole and slip casting;It excavates, one Pin bracing members spacing of drilling depth;First pneumatically placed concrete hangs steel Muscle net erects bracing members, gunite concrete;Preliminary bracing back-grouting;Carry out next step circulation;
(4) it enters the station after the completion of choosing high section preliminary bracing structure, carries out Station main structure construction;
(5) after the completion of the main structure construction of station, access ramp tunneling slope section bottom is abolished, is excavated to entrance bottom downwards Plate absolute altitude performs entrance slope section bottom later period excavation entrance just branch structure;Then construction, which is entered the station, chooses that high section, people's air defense is straight For section to two lining structure of tunneling slope section, mould builds armored concrete;
(6) backfill, which is entered the station, chooses gap above high section and tunneling slope section entrance section arch, and backfill uses C20 coagulation Soil, while arch built-in slip casting pipe is served as a contrast in port structure two, two backing grouting behind shaft or drift lining are carried out, are filled after two backings of guarantee closely knit;
(7) entrance open cut open-mouth section is backfilled, open cut waterproof layer and bottom plate, side wall and top board structure are applied;Using plain soil It backfills at the top of open cut rectangular cross section to ground elevation, applies entrance internal structure, so far form the ground as construction access ramp Iron entrance.
The invention has the benefit that
1, a kind of utilization subway entrance of the invention overcomes conventionally employed as construction access ramp structure and construction method The shortcomings that construction shaft vertical-lift low efficiency, change vertical-lift significantly improve construction efficiency into horizontal flexible transport;
2, structural support system is simple, in conjunction with port structure step-by-step arrangement construction access ramp, makes full use of existing structure, Abandoned project amount very little;
3, relative to traditional construction shaft and construction transverse passage-way, using entrance as the structure section of construction access ramp Small, excavation height is small, and construction risk is small;
4, structure occupied ground is few, does not directly increase construction site, while a construction access ramp newly using subway entrance It is able to satisfy station construction demand, it is small on surrounding enviroment influence, it is convenient for construction organization and coordination;
5, engineering method simple process, easy to operate, combined using light and shade and slope choose high piecewise combination mode can be well real Now enter the station function of constructing, and improves work efficiency, saves project cost.
Detailed description of the invention
Fig. 1 is structural plan arrangement schematic diagram of the invention;
Fig. 2 is structure vertical section arrangement schematic diagram of the invention;
Fig. 3 enters station main structure diagrammatic cross-section for of the invention;
Fig. 4 is open cut open-mouth section sectional schematic diagram of the invention;
Fig. 5 is tunneling slope section sectional schematic diagram of the invention;
Fig. 6 is people's air defense flat segments sectional schematic diagram of the invention;
Fig. 7 is that high section sectional schematic diagram is chosen in of the invention entering the station;
Fig. 8 is open cut open-mouth section supporting construction schematic diagram of the invention;
Fig. 9 is that construction access ramp preliminary bracing structure construction of the invention forms schematic diagram;
Figure 10 is entrance tunneling slope section secondary liner structure construction schematic diagram of the invention;
Figure 11 is entrance open cut open-mouth section of the invention and internal structure construction schematic diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
In figure, 1- foundation pit side-wall supporting, 2- base plate of foundation pit bed course, 3- plate brad supporting, 4- concrete shield top, 5- open cut backfill Layer, 6- open cut waterproof layer, 7- entrance concrete structure, 8- tunneling advance support, 9- construction channel preliminary bracing structure, 10- Access ramp construction channel base plate, the 11- later period excavates entrance, and just branch structure, two lining structure of 12- tunneling slope section, 13- tunneling are oblique Slope section fill concrete layer, 14- people's air defense advance support, 15- people's air defense preliminary bracing structure, two lining structure of 16- people's air defense, 17- enter the station High section advance support is chosen, 18-, which enters the station, chooses high section preliminary bracing structure, and 19-, which enters the station, chooses high two lining structure of section, and 20-, which enters the station, chooses high section Fill concrete layer, the station 21- main structure, 22- gate stack structure, 23- entrance internal structure, 24- tunneling slope section, 25- People's air defense flat segments, 26-, which enters the station, chooses high section, 27- open cut exit and entrance, 28- tunneling slope section channel, 29- tunneling waterproof layer, 30- people's air defense waterproof layer, 31- antiaircraft tunnel, 32- enter the station channel, and 33- enters the station waterproof layer, 34- bed course, 35- open cut open-mouth section.
Embodiment 1
It is a kind of to double as construction access ramp structure, including open cut open-mouth section 35, tunneling slope section 24, people using subway entrance It anti-flat segments 25 and enters the station and chooses high section 26, open cut open-mouth section 35, tunneling slope section 24, people's air defense flat segments 25 and enter the station and choose high section 26 It is sequentially connected logical formation construction access ramp structure.
Access ramp of constructing utilizes subway port structure, and construction period is tiltedly logical as construction using Tunnel structure Road bearing structure, construction in later period secondary lining form the port structure of subway station;The clear span of construction access ramp is using discrepancy Two lining structure width of mouth structure, the clear span for access ramp of constructing are 4.5m;The clear height of construction access ramp is using port structure Two lining structure height, the clear height for access ramp of constructing are 5.0m.
Open cut open-mouth section 35 includes concrete shield top 4, foundation pit side-wall supporting 1, base plate of foundation pit bed course 2, plate brad supporting 3, bright It digs backfill layer 5, bed course 34 and open cut waterproof layer 6, entrance concrete structure 7, foundation pit side-wall supporting 1 and is set to base plate of foundation pit pad The top two sides of layer 2, concrete shield top 4 are set to the top of foundation pit side-wall supporting 1, and plate brad supporting 3 is fixed on foundation pit side-wall branch The outside of shield 1, open cut backfill layer 5 are filled between the foundation pit side-wall supporting 1 of two sides and base plate of foundation pit bed course 2, entrance coagulation Soil structure 7 is located between the foundation pit side-wall supporting 1 of two sides and its top for being located at open cut backfill layer 5, entrance concrete knot Structure 7 forms open cut exit and entrance 27, and bed course 34 and open cut waterproof layer 6 are set to open cut backfill layer 5, entrance concrete structure Between 7.
In open cut open-mouth section 35,35 length of open cut open-mouth section is 30m, and foundation pit side-wall supporting 1 is by fashioned iron, soil nailing, steel mesh It is formed with gunite concrete, bed course 34 is arranged close to open cut backfill layer 5, and open cut waterproof layer 6 is set close to entrance concrete structure 7 It sets.
At the beginning of tunneling slope section 24 includes tunneling advance support 8, construction channel preliminary bracing structure 9, later period excavation entrance Branch structure 11, two lining structure 12 of tunneling slope section, tunneling slope section fill concrete layer 13, channel preliminary bracing structure 9 of constructing It is set to the top of the later period first branch structure 11 of excavation entrance, two lining structure 12 of tunneling slope section is set to construction channel initial stage branch Protection structure 9, later period excavate the inside of the first branch structure 11 of entrance, offer tunneling slope section in two lining structure 12 of tunneling slope section Channel 28, tunneling slope section fill concrete layer 13 are filled in construction channel preliminary bracing structure 9, two lining structure of tunneling slope section Between 12 top, tunneling advance support 8 is set to the tip exterior of construction channel preliminary bracing structure 9.
In tunneling slope section 24, the gradient that tunneling slope section 24 longitudinally uses for 14%, two lining structure 12 of tunneling slope section with Tunneling slope section fill concrete layer 13, construction channel preliminary bracing structure 9, later period excavate to be set between the first branch structure 11 of entrance It is equipped with the tunneling waterproof layer 29 of perforation, channel preliminary bracing structure 9 of constructing is by grid steel frame, steel mesh and gunite concrete group At two lining structure 12 of tunneling slope section is reinforced concrete structure.
People's air defense flat segments 25 are the people's air defense segment structure that subway entrance is fully utilized, including people's air defense advance support 14, people Anti- preliminary bracing structure 15, two lining structure 16 of people's air defense and gate stack structure 22, it is advanced that people's air defense preliminary bracing structure 15 is set to people's air defense The top outer of supporting 14, two lining structure 16 of people's air defense are set to the inside of people's air defense preliminary bracing structure 15, two lining structure 16 of people's air defense Inside offer antiaircraft tunnel 31.
Entering the station, to choose high section 26 include entering the station and choosing high section advance support 17, enter the station and choose high section preliminary bracing structure 18, enter the station and choose High two lining structure 19 of section enters the station and chooses high section fill concrete layer 20, enters the station to choose high section advance support 17 and be set to enter the station and chooses high section The top outer of preliminary bracing structure 18 enters the station to choose high two lining structure 19 of section and be set to enter the station and chooses high section preliminary bracing structure 18 Inside enters the station and chooses the inside of high two lining structure 19 of section and offer channel 32 of entering the station, and enters the station and chooses high section fill concrete layer 20 and be arranged High section preliminary bracing structure 18 is chosen, between the top for choosing high two lining structure 19 of section of entering the station in entering the station.
In people's air defense flat segments 25, the top of two lining structure 16 of people's air defense is downwardly extending gate stack structure 22, the lining knot of people's air defense two People's air defense waterproof layer 30 is provided between structure 16, people's air defense preliminary bracing structure 15;It enters the station and chooses in high section 26, enter the station and choose the high lining of section two knot Structure 19 and enter the station choose high section fill concrete layer 20, entering the station to choose is provided with the waterproof layer that enters the station between high section preliminary bracing structure 18 33, it enters the station and chooses the vault of high section preliminary bracing structure 18 main body 21 vault absolute altitude in station is raised above using the gradient gradual change of 1:3, Convenient for the horse-head ingate that enters the station out.
Open cut exit and entrance 27, tunneling slope section channel 28, antiaircraft tunnel 31, channel 32 of entering the station are sequentially communicated.
The embodiment for being applied to metro station construction as construction access ramp structure using subway entrance of the invention, such as It is provided by the invention to double as construction access ramp construction method including in order using subway entrance shown in Fig. 1-Figure 11 The following steps of progress:
(1) 35 foundation pit unwrapping wire of open cut open-mouth section positions, and excavates access ramp open cut open-mouth section 35;Foundation pit side is handled when excavating Wall is arranged foundation pit side-wall supporting 1, sets plate brad supporting 3 and apply fashioned iron and gunite concrete structure, gunite concrete thickness 300mm;Using cast-in-situ bored pile+inner support system as foundation pit enclosure structure when the weakness of stratum;After being excavated to the low absolute altitude of foundation pit 2 structure of bottom cushion is applied, base plate of foundation pit bed course 2 uses 200 thickness C20 concrete;Foundation pit surrounding ground is arranged concrete and protects top 4 Reinforcing and water blocking;
(2) the tunneling advance support 8 that tunneling access ramp arch is set in foundation pit side-wall uses diameter into hole advance support 108mm steel tube shed and diameter 32mm grouting with small pipe, grouting serous fluid use cement single slurry;Then base within the scope of access ramp is abolished Side wall is cheated, setting grid steel frame and foundation pit side-wall fashioned iron weld;
(3) it carries out tunneling slope section 24 to construct, be excavated using benching tunnelling method, one Pin bracing members spacing of drilling depth, first pneumatically placed concrete, Steel mesh is hung, bracing members are erected, gunite concrete completes construction channel preliminary bracing structure 9 and access ramp construction channel base plate 10, slope section uses the 14% downward gradient;
(4) it carries out people's air defense flat segments 25 to construct, people's air defense advance support 14 of first constructing is reinforced using grouting with small pipe;Tunnel It excavates and uses benching tunnelling method, one Pin bracing members spacing of drilling depth, first pneumatically placed concrete, extension steel mesh, erection bracing members, gunite concrete, Complete oblique people's air defense preliminary bracing structure 15.
(5) after the completion of people's air defense flat segments 25, the high construction of section 26 is chosen into entering the station;Tunnel vault according to 1:3 the gradient gradually Height is chosen, first construction, which is entered the station, chooses high section advance support 17, reinforces using grouting with small pipe;Tunnel excavation uses benching tunnelling method, drilling depth one Pin bracing members spacing, first pneumatically placed concrete hang steel mesh, erect bracing members, and gunite concrete is completed tiltedly to enter the station and chooses high section initial stage branch Protection structure 18 so far completes construction access ramp just branch structure construction;
(6) it enters the station after the completion of choosing high section preliminary bracing structure 18, carries out Station station main structure 21 and construct;
(7) after the completion of station main structure 21 is constructed, the access ramp construction channel base plate of access ramp tunneling slope section is abolished 10, it is excavated to entrance floor level downwards, performs entrance slope section bottom later period excavation entrance just branch structure 11;
(8) it after the completion of just 11 construction of branch structure of later period excavation entrance, falls back to construct to enter the station from station interface and chooses high section Two lining structures 19, two lining structure 16 of people's air defense and gate stack structure 22, two lining structure 12 of tunneling slope section, using gang form scaffold Mould builds armored concrete;
(9) it enters the station and chooses high section 26 and two lining side of tunneling slope section entrance there are gap, construction, which is entered the station, chooses high section backfill Concrete layer 20 and tunneling slope section fill concrete layer 13, backfill uses C20 concrete, while serving as a contrast and encircleing in port structure two Portion's built-in slip casting pipe carries out two backing grouting behind shaft or drift lining, fills after two backings of guarantee closely knit;
(10) after the completion of entrance tunneling open-mouth section 23 is constructed, construction open cut backfills layer 5, then applies the open cut above it Section bed course 34 and open cut waterproof layer 6, then mould builds bottom plate, side wall and entrance concrete structure 7;Using plain earthen backfill open cut square Shape profile head applies entrance internal structure 23, so far forms the subway entrance as construction access ramp to ground elevation.
Embodiment 2
A kind of to be doubled as in construction access ramp structure using subway entrance, the clear span for access ramp of constructing uses port structure Two lining structure width, the clear span of access ramp of constructing is 5m;The clear height of construction access ramp uses two lining structures of port structure Highly, construct access ramp clear height be 5.5m;In open cut open-mouth section 35,35 length of open cut open-mouth section is 26m;Tunneling slope section 24 In, the gradient that tunneling slope section 24 longitudinally uses is 12%;Rest part is the same as embodiment 1.
The embodiment for being applied to metro station construction as construction access ramp structure using subway entrance of the invention, such as It is provided by the invention to double as construction access ramp construction method including in order using subway entrance shown in Fig. 1-Figure 11 The following steps of progress:
(1) 35 foundation pit unwrapping wire of open cut open-mouth section positions, and excavates access ramp open cut open-mouth section 35;Foundation pit side is handled when excavating Wall is arranged foundation pit side-wall supporting 1, sets plate brad supporting 3 and apply fashioned iron and gunite concrete structure, gunite concrete thickness 310mm;Using cast-in-situ bored pile+inner support system as foundation pit enclosure structure when the weakness of stratum;After being excavated to the low absolute altitude of foundation pit 2 structure of bottom cushion is applied, base plate of foundation pit bed course 2 uses 200 thickness C20 concrete;Foundation pit surrounding ground is arranged concrete and protects top 4 Reinforcing and water blocking;
(2) the tunneling advance support 8 that tunneling access ramp arch is set in foundation pit side-wall uses diameter into hole advance support 110mm steel tube shed and diameter 30mm grouting with small pipe, grouting serous fluid use cement single slurry;Then base within the scope of access ramp is abolished Side wall is cheated, setting grid steel frame and foundation pit side-wall fashioned iron weld;
(3) it carries out tunneling slope section 24 to construct, be excavated using benching tunnelling method, one Pin bracing members spacing of drilling depth, first pneumatically placed concrete, Steel mesh is hung, bracing members are erected, gunite concrete completes construction channel preliminary bracing structure 9 and access ramp construction channel base plate 10, slope section uses the 12% downward gradient;
(4) it carries out people's air defense flat segments 25 to construct, people's air defense advance support 14 of first constructing is reinforced using bolt grouting;It opens in tunnel It digs and uses benching tunnelling method, one Pin bracing members spacing of drilling depth, first pneumatically placed concrete hangs steel mesh, erects bracing members, and gunite concrete is complete At oblique people's air defense preliminary bracing structure 15;
(5) after the completion of people's air defense flat segments 25, the high construction of section 26 is chosen into entering the station;Tunnel vault according to 1:3 the gradient gradually Height is chosen, first construction, which is entered the station, chooses high section advance support 17, reinforces using bolt grouting;Tunnel excavation uses benching tunnelling method, one Pin of drilling depth Bracing members spacing, first pneumatically placed concrete hang steel mesh, erect bracing members, and gunite concrete is completed tiltedly to enter the station and chooses high section preliminary bracing Structure 18 so far completes construction access ramp just branch structure construction;
Step (6)-(10) are the same as embodiment 1.
Embodiment 3
A kind of to be doubled as in construction access ramp structure using subway entrance, the clear span for access ramp of constructing uses port structure Two lining structure width, the clear span of access ramp of constructing is 5.5m;The clear height of construction access ramp is tied using two linings of port structure Structure height, the clear height for access ramp of constructing are 5.5m;In open cut open-mouth section 35,35 length of open cut open-mouth section is 35m;Tunneling slope section In 24, the gradient that tunneling slope section 24 longitudinally uses is 13%;Rest part is the same as embodiment 1.
The embodiment for being applied to metro station construction as construction access ramp structure using subway entrance of the invention, such as It is provided by the invention to double as construction access ramp construction method including in order using subway entrance shown in Fig. 1-Figure 11 The following steps of progress:
(1) 35 foundation pit unwrapping wire of open cut open-mouth section positions, and excavates access ramp open cut open-mouth section 35;Foundation pit side is handled when excavating Wall is arranged foundation pit side-wall supporting 1, sets plate brad supporting 3 and apply fashioned iron and gunite concrete structure, gunite concrete thickness 320mm;Using cast-in-situ bored pile+inner support system as foundation pit enclosure structure when the weakness of stratum;After being excavated to the low absolute altitude of foundation pit 2 structure of bottom cushion is applied, base plate of foundation pit bed course 2 uses 200 thickness C20 concrete;Foundation pit surrounding ground is arranged concrete and protects top 4 Reinforcing and water blocking;
(2) the tunneling advance support 8 that tunneling access ramp arch is set in foundation pit side-wall uses diameter into hole advance support 108mm steel tube shed and diameter 30mm grouting with small pipe, grouting serous fluid use cement single slurry;Then base within the scope of access ramp is abolished Side wall is cheated, setting grid steel frame and foundation pit side-wall fashioned iron weld;
(3) it carries out tunneling slope section 24 to construct, be excavated using benching tunnelling method, one Pin bracing members spacing of drilling depth, first pneumatically placed concrete, Steel mesh is hung, bracing members are erected, gunite concrete completes construction channel preliminary bracing structure 9 and access ramp construction channel base plate 10, slope section uses the 13% downward gradient;
(4) it carries out people's air defense flat segments 25 to construct, people's air defense advance support 14 of first constructing is reinforced using grouting with small pipe;Tunnel It excavates and uses benching tunnelling method, one Pin bracing members spacing of drilling depth, first pneumatically placed concrete, extension steel mesh, erection bracing members, gunite concrete, Complete oblique people's air defense preliminary bracing structure 15;
(5) after the completion of people's air defense flat segments 25, the high construction of section 26 is chosen into entering the station;Tunnel vault according to 1:3 the gradient gradually Height is chosen, first construction, which is entered the station, chooses high section advance support 17, reinforces using grouting with small pipe;Tunnel excavation uses benching tunnelling method, drilling depth one Pin bracing members spacing, first pneumatically placed concrete hang steel mesh, erect bracing members, and gunite concrete is completed tiltedly to enter the station and chooses high section initial stage branch Protection structure 18 so far completes construction access ramp just branch structure construction;
Step (6)-(10) are the same as embodiment 1.
Structure of the invention and construction method are suitable for quaternary formation and rocky stratum tunneling subway station and big cross section tunnel The construction in road construction channel, tunneling section answer strict control to excavate drilling depth no more than 1 Pin grid steel frame spacing, in time closing when constructing Cyclization;Horse-head ingate and process should carry out stratum consolidation when converting;The length of bench that every step in channel is excavated is about 3~5m, Face is closed when the upper layer excavation intermittent time is longer, using 5cm thickness gunite concrete;Rocky stratum is taken weak quick-fried when constructing It is broken, soft stratum settable interim inverted arch control deformation when constructing;Reinforce tunnel deformation monitoring simultaneously.
3 embodiments of the invention are described in detail above, but the content is only preferable implementation of the invention Example, should not be considered as limiting the scope of the invention.It is all according to all the changes and improvements made by the present patent application range Deng should still be within the scope of the patent of the present invention.

Claims (9)

1. a kind of construction method for doubling as construction access ramp structure using subway entrance, which is characterized in that including open cut opening Section, tunneling slope section, people's air defense flat segments and enter the station and choose high section, the open cut open-mouth section, tunneling slope section, people's air defense flat segments and into Station chooses high section and is sequentially connected logical formation construction access ramp structure realization construction level transport, follows the steps below:
(1) open cut open-mouth section foundation pit unwrapping wire positions, and excavates access ramp open cut open-mouth section;Foundation pit side-wall is handled when excavating, is set Plate brad supporting and fashioned iron and gunite concrete structure are applied, using cast-in-situ bored pile+inner support system as base when the weakness of stratum Pit enclosure structure applies base plate of foundation pit cushion layer structure after being excavated to foundation pit bottom absolute altitude;
(2) the tunneling advance support that tunneling access ramp arch is set in foundation pit side-wall, into hole advance support using steel tube shed or Grouting with small pipe;
(3) it carries out tunneling slope section, people's air defense flat segments and enters the station to choose the access ramp boring construction of high section, construction is opened using benching tunnelling method It digs, setting interim inverted arch together in middle part when geological conditions is poor or monitoring needs, just branch structure construction is main for entrance access ramp Step are as follows: advance support ductule or anchor pole and slip casting;It excavates, one Pin bracing members spacing of drilling depth;First pneumatically placed concrete hangs reinforcing bar Net erects bracing members, gunite concrete;Preliminary bracing back-grouting;Carry out next step circulation;
(4) it enters the station after the completion of choosing high section preliminary bracing structure, carries out Station main structure construction;
(5) after the completion of the main structure construction of station, access ramp tunneling slope section bottom is abolished, is excavated to entrance bottom plate mark downwards Height performs entrance slope section bottom later period excavation entrance just branch structure;Then construction, which is entered the station, chooses high section, people's air defense flat segments extremely Two lining structure of tunneling slope section, mould build armored concrete;
(6) backfill, which is entered the station, chooses gap above high section and tunneling slope section entrance section arch, and backfill uses C20 concrete, together When port structure two serve as a contrast arch built-in slip casting pipe, carry out two backing grouting behind shaft or drift lining, guarantee two backings after fill it is closely knit;
(7) entrance open cut open-mouth section is backfilled, open cut waterproof layer and bottom plate, side wall and top board structure are applied;Using plain earthen backfill To ground elevation at the top of open cut rectangular cross section, entrance internal structure is applied, the subway so far formed as construction access ramp goes out Entrance.
2. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 1, special Sign is: the construction access ramp utilizes subway port structure, and construction period is using Tunnel structure as construction Access ramp bearing structure, construction in later period secondary lining form the port structure of subway station;The clear span of construction access ramp uses Two lining structure width of port structure, the clear span >=4.5m for access ramp of constructing;The clear height of construction access ramp uses entrance knot Two lining structure height of structure, the clear height >=5.0m for access ramp of constructing.
3. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 1, special Sign is: the open cut open-mouth section includes concrete shield top, foundation pit side-wall supporting, base plate of foundation pit bed course, plate brad supporting, open cut time Packing course, bed course and open cut waterproof layer, entrance concrete structure, the foundation pit side-wall supporting are set to the upper of base plate of foundation pit bed course Square two sides, concrete shield top are set to the top of the foundation pit side-wall supporting, and the plate brad supporting is fixed on foundation pit side-wall The outside of supporting, the open cut backfill layer are filled between the foundation pit side-wall supporting of two sides and base plate of foundation pit bed course, the discrepancy Mouth concrete structure is located between the foundation pit side-wall supporting of two sides and its top for being located at open cut backfill layer, the entrance are mixed Xtah Crude Clay structure forms open cut exit and entrance, and the bed course and open cut waterproof layer are set to open cut backfill layer, entrance concrete Between structure.
4. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 3, special Sign is: in the open cut open-mouth section, the open cut opening segment length is 25-35m, and the foundation pit side-wall supporting is by fashioned iron, soil Nail, steel mesh and gunite concrete composition, the bed course is close to open cut backfill layer setting, and the open cut waterproof layer is close to entrance Concrete structure setting.
5. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 1, special Sign is: the tunneling slope section includes tunneling advance support, construction channel preliminary bracing structure, later period excavation entrance just branch Structure, two lining structure of tunneling slope section, tunneling slope section fill concrete layer, the construction channel preliminary bracing structure setting in Later period excavates the top of the first branch structure of entrance, and two lining structure of tunneling slope section is set to the construction channel preliminary bracing Structure, later period excavate the inside of the first branch structure of entrance, and it is logical to offer tunneling slope section in two lining structure of tunneling slope section Road, the tunneling slope section fill concrete layer are filled in construction channel preliminary bracing structure, two lining structure of tunneling slope section Between top, the tunneling advance support is set to the tip exterior of the construction channel preliminary bracing structure.
6. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 5, special Sign is: in the tunneling slope section, the gradient≤14% that the tunneling slope section longitudinally uses, the tunneling slope section two is served as a contrast Structure and tunneling slope section fill concrete layer, construction channel preliminary bracing structure, later period excavate between the first branch structure of entrance It is provided with the tunneling waterproof layer of perforation, the construction channel preliminary bracing structure is by grid steel frame, steel mesh and gunite concrete Composition, two lining structure of tunneling slope section are reinforced concrete structure.
7. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 1, special Sign is: the people's air defense flat segments include people's air defense advance support, people's air defense preliminary bracing structure, two lining structure of people's air defense and gate stack knot Structure, the people's air defense preliminary bracing structure setting is in the top outer of the people's air defense advance support, two lining structure of the people's air defense setting Antiaircraft tunnel is offered in the inside of the inside of the people's air defense preliminary bracing structure, two lining structure of people's air defense.
8. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 1, special Sign is: described to enter the station that choose high section include entering the station and choosing high section advance support, enter the station and choose high section preliminary bracing structure, enter the station and choose high section Two lining structures enter the station and choose high section fill concrete layer, it is described enter the station to choose high section advance support and be set to enter the station choose high section initial stage branch The top outer of protection structure, it is described enter the station to choose high two lining structure of section and be set to described enter the station choose the interior of high section preliminary bracing structure Portion, described enter the station choose the inside of high two lining structure of section and offer channel of entering the station, and described enter the station chooses high section fill concrete layer setting High section preliminary bracing structure is chosen, between the top for choosing high two lining structure of section of entering the station in entering the station.
9. a kind of construction method for doubling as construction access ramp structure using subway entrance according to claim 8, special Sign is: in the people's air defense flat segments, gate stack structure, the lining of people's air defense two knot are downwardly extending at the top of two lining structure of people's air defense People's air defense waterproof layer is provided between structure, people's air defense preliminary bracing structure;Described enter the station is chosen in high section, and described enter the station chooses the high lining of section two knot Structure and enter the station choose high section fill concrete layer, entering the station to choose is provided with the waterproof layer that enters the station between high section preliminary bracing structure, it is described into The vault that high section preliminary bracing structure is chosen at station is raised above station main body vault absolute altitude using the gradient gradual change of 1:3.
CN201510649961.XA 2015-10-10 2015-10-10 It is a kind of to double as construction access ramp structure and construction method using subway entrance Active CN106567717B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510649961.XA CN106567717B (en) 2015-10-10 2015-10-10 It is a kind of to double as construction access ramp structure and construction method using subway entrance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510649961.XA CN106567717B (en) 2015-10-10 2015-10-10 It is a kind of to double as construction access ramp structure and construction method using subway entrance

Publications (2)

Publication Number Publication Date
CN106567717A CN106567717A (en) 2017-04-19
CN106567717B true CN106567717B (en) 2019-03-05

Family

ID=58506071

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510649961.XA Active CN106567717B (en) 2015-10-10 2015-10-10 It is a kind of to double as construction access ramp structure and construction method using subway entrance

Country Status (1)

Country Link
CN (1) CN106567717B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107218045B (en) * 2017-07-03 2019-03-26 中车建设工程有限公司 The rapid constructing method of rocky stratum tunneling subway station entrance tunneling section
CN107816354B (en) * 2017-09-20 2019-03-26 中铁建大桥工程局集团第一工程有限公司 Subway station entrance backward, which is instead dug, chooses high construction method with multi-step
CN111720126A (en) * 2020-06-24 2020-09-29 中铁第五勘察设计院集团有限公司 Construction method for entering tunnel through ingate of underground excavation tunnel
CN111810202A (en) * 2020-07-20 2020-10-23 武汉市市政建设集团有限公司 Underground connecting channel interface construction method
CN113027495B (en) * 2021-05-26 2021-07-23 中国铁路设计集团有限公司 Underground excavation large-span station construction method implemented by interval tunnel organization

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322027A (en) * 2011-06-28 2012-01-18 广州轨道交通建设监理有限公司 A kind of method that adopts the Mine Method expansion to dig shield tunnel construction subway station
CN102758632A (en) * 2012-07-19 2012-10-31 中铁隧道集团有限公司 Rock stratum double initial support layering method for establishing large-scale underground structure
CN102767379A (en) * 2012-08-10 2012-11-07 中国建筑第四工程局有限公司 Shallow-buried unsymmetrical pressure section tunnel drilling construction method
CN103362513A (en) * 2013-07-29 2013-10-23 中铁七局集团第五工程有限公司 Transformation and construction method for existing cavity in underground excavation region
CN104047621A (en) * 2013-03-14 2014-09-17 上海市城市建设设计研究总院 Construction method of cross aisle with high cross section under excavation conditions of basement with small clear distance at top
EA021287B1 (en) * 2011-03-03 2015-05-29 Общество С Ограниченной Ответственностью "Спецметропроект" (Ооо "Спецметропроект") Double-level deep subway station complex
CN205100989U (en) * 2015-10-10 2016-03-23 中铁隧道勘测设计院有限公司 Utilize oblique access structure of subway access & exit double as construction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA021287B1 (en) * 2011-03-03 2015-05-29 Общество С Ограниченной Ответственностью "Спецметропроект" (Ооо "Спецметропроект") Double-level deep subway station complex
CN102322027A (en) * 2011-06-28 2012-01-18 广州轨道交通建设监理有限公司 A kind of method that adopts the Mine Method expansion to dig shield tunnel construction subway station
CN102758632A (en) * 2012-07-19 2012-10-31 中铁隧道集团有限公司 Rock stratum double initial support layering method for establishing large-scale underground structure
CN102767379A (en) * 2012-08-10 2012-11-07 中国建筑第四工程局有限公司 Shallow-buried unsymmetrical pressure section tunnel drilling construction method
CN104047621A (en) * 2013-03-14 2014-09-17 上海市城市建设设计研究总院 Construction method of cross aisle with high cross section under excavation conditions of basement with small clear distance at top
CN103362513A (en) * 2013-07-29 2013-10-23 中铁七局集团第五工程有限公司 Transformation and construction method for existing cavity in underground excavation region
CN205100989U (en) * 2015-10-10 2016-03-23 中铁隧道勘测设计院有限公司 Utilize oblique access structure of subway access & exit double as construction

Also Published As

Publication number Publication date
CN106567717A (en) 2017-04-19

Similar Documents

Publication Publication Date Title
CN106567717B (en) It is a kind of to double as construction access ramp structure and construction method using subway entrance
CN101440708B (en) PBA shallow buried underground excavating close range large section three-hole separated island type structure construction method
CN202707075U (en) Long-span subway station main structure constructed based on column and arch method
CN102226403B (en) Construction method of large-span subway station main body by using arched cover method and station main body structure
CN105888703B (en) Super Shallow Covered Metro Station construction method under lateral canopy lid is performed in micro- pilot tunnel
CN102758632A (en) Rock stratum double initial support layering method for establishing large-scale underground structure
CN105041349B (en) A kind of excavating construction method that station is digged on the basis of Subway Tunnel shield tunnel
CN105298501B (en) The attached air channel structure construction method of Station
CN102606162A (en) Quick construction method for weak surrounding rock shallowly-buried easily-collapsed area of tunnel
CN102748040B (en) Main structure for metro long-span station and pillar arching construction method thereof
CN102071947A (en) Construction method for soft surrounding rock section of large-span tunnel portal
CN105201516B (en) A kind of main structure of subway station and its tetrad arch PBA excavating construction methods
CN201991017U (en) Subway large-span station body structure based on arch cover method construction forming
CN106703828B (en) The construction method of subway station is built using prefabricated assembled lining cutting combination PBA
CN103924602B (en) Deep Thick Soft Ground foundation ditch construction method
CN104047623A (en) Large-span grotto excavation construction method
CN106437726A (en) Ground fracture crushed zone passing construction method for shallow-buried tunnel excavation
CN106968690A (en) The method for tunnel construction for soil property of caving in
CN106703814A (en) Mined metro station hole pile construction method
CN107288642A (en) PBA construction technologies
CN107023300A (en) A kind of use canopy, which is defended the doctrine, builds the construction method of subway station
CN103993885A (en) Construction method for underground excavation tunnel side-direction hole opening supporting system
CN110374657A (en) The Mining Method Subway Tunnel ventilating shaft and its construction method of " well after first shield "
CN205100989U (en) Utilize oblique access structure of subway access & exit double as construction
CN105863650A (en) Tunneling construction method with first wall construction and second tunneling construction

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right

Effective date of registration: 20190202

Address after: 300000 Tianjin Free Trade Test Zone (Airport Economic Zone) No. 36 West Central Road

Applicant after: CHINA RAILWAY LIUYUAN GROUP CO., LTD.

Address before: No. 1 Hebei street, Hongqiao District, Tianjin City, Tianjin

Applicant before: Zhongtie Tunnel Survey and Design Inst., Ltd.

TA01 Transfer of patent application right
GR01 Patent grant
GR01 Patent grant