CN208605183U - What a kind of middle hole method zero distance passed through existing subway station underpins system - Google Patents

What a kind of middle hole method zero distance passed through existing subway station underpins system Download PDF

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Publication number
CN208605183U
CN208605183U CN201820931507.2U CN201820931507U CN208605183U CN 208605183 U CN208605183 U CN 208605183U CN 201820931507 U CN201820931507 U CN 201820931507U CN 208605183 U CN208605183 U CN 208605183U
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China
Prior art keywords
subway station
pilot tunnel
existing subway
existing
zero distance
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CN201820931507.2U
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Inventor
戴志仁
胡瑞青
李润轩
王俊
郭亮
王立新
马晓波
康华
王天明
李谈
高志宏
李储军
贾少春
曹伟
杨沛敏
翁木生
毛念华
张海
汪珂
王博
王春希
段亚刚
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China Railway First Survey and Design Institute Group Ltd
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China Railway First Survey and Design Institute Group Ltd
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Abstract

The utility model relates to what a kind of middle hole method zero distance passed through existing subway station to underpin system, new subway station is passed through from zero distance below existing subway station, intermediate pilot tunnel is performed along new subway station direction in node region, intermediate pilot tunnel both lateral sides have performed side pilot tunnel along existing subway station direction;Steel column has been performed below the existing subway station side wall of intermediate pilot tunnel two ends, at the pilot tunnel two ends new subway station side wall of side and below the existing subway station center pillar of node region, before node region large area earth excavation, completes steel column and vertically underpin system construction.The utility model is based on middle hole method excavation pilot tunnel and performs the system of underpining, the conversion of vertical carrying system and effective transmitting of load are quickly completed, large area excavation then is carried out to node region surplus earth, the wall column system at new subway station is finally poured, has and vertically underpins the advantages such as system power transmission is reliable, small on the influence of existing subway station, execution conditions are good, the duration is controllable.

Description

What a kind of middle hole method zero distance passed through existing subway station underpins system
Technical field
The utility model belongs to Tunnel Engineering technical field, and in particular to a kind of middle hole method zero distance passes through existing subway That stands underpins system.
Background technique
With the continuous encryption of Urban Rail Transit, when subsequent subway line is built, by built subway line and week The influence of surrounding environment, in line alignment and paving mode, spatial relationship and structural shape and construction method and engineering measure etc. The requirement of aspect is harsher.In order to realize that the short distance between each route of urban track traffic is changed to, subway station is promoted The case where service function and service quality, existing subway station closely or even under zero distance is worn in new subway station, is increasingly It is more.During new subway station construction, in addition to self structure safety, the most important thing is to ensure that the safety of existing subway station Operation is not influenced by new construction.Regular partition domain is layered more pilot drives there are excavated sections that small, working procedure is more, beaer The existing subway station safety in top can not be effectively ensured in the unfavorable factors such as system's conversion is frequent, accumulative sedimentation and deformation is obvious.For will be new It builds metro station construction to be preferably minimized the influence degree of existing subway station, guarantees existing structure of the subway safety and normal fortune Battalion, needs to adjust and optimize conventional crossing project design concept and construction, the stress in conventional engineering method work progress is released It puts and passively controls, be adjusted to actively to underpin.
Summary of the invention
The purpose of the utility model is to provide what a kind of middle hole method zero distance passed through existing subway station to underpin system, is based on Middle hole method excavation pilot tunnel, which performs, vertically underpins system, and utmostly reduction new subway station short distance or zero distance are passed through existing The adverse effect of metro station construction.
The technology employed by the present utility model is
What a kind of middle hole method zero distance passed through existing subway station underpins system, it is characterised in that:
New subway station zero distance below existing subway station is passed through, along new subway station direction in node region Intermediate pilot tunnel is performed, intermediate pilot tunnel both lateral sides have performed side pilot tunnel along existing subway station direction;
Below the existing subway station side wall of intermediate pilot tunnel two ends, at the existing subway station side wall of side pilot tunnel two ends, with And steel column has been performed below existing subway station center pillar in intermediate pilot tunnel and side pilot tunnel.
Intermediate pilot tunnel two sides are provided with side wall shotcrete system, and including the anchor pole set in side wall, termination point of anchor rod is linked with steel Muscle net and spray set concrete.
Before the pilot drive of side, horizontal interim fashioned iron is provided between the steel column and intermediate pilot tunnel side wall in intermediate pilot tunnel Stull, horizontal interim fashioned iron stull are welded and fixed with side wall shotcrete system.
Fashioned iron column bottom in intermediate pilot tunnel below existing subway station center pillar is provided with expansion cushion cap foundation.
Fashioned iron column bottom below existing subway station center pillar is welded with the profiled sheet for opening up screw hole, and solid by bolt Fixed arrive expands cushion cap foundation top surface, and bolt is using the cementing concrete for being fixed on expansion cushion cap foundation of Chemical Felter and anchor adhesive In substrate.
Within the scope of new subway station and existing subway station node region, new subway station quadrangle is provided with fashioned iron Column.
Steel column in node region is poured in new subway station interior main body structure side wall or newly-built is underpined in column.
It is newly-built to underpin column capital and after existing subway station bottom plate does dabbing processing, it is viscous by epoxy adhesive It connects, and multiple tracks is set in adhesive layer and delays swollen property water-swellable water-stop glue.
The utility model has the advantage that
The utility model enriches new subway station short distance or zero distance passes through the design concept of existing subway station And construction technology, middle hole method pilot tunnel preliminary bracing (anchor pole, steel mesh, early strong gunite concrete), horizontal interim type steel support, type Steel column, the micro-expansion cement slurry for expanding cushion cap foundation and pressure-bearing steel plate, pre-buried slip casting steel pipe and pressure injection delay swollen property water-swellable and stop Water bar and pour station main structure steel, concrete and prespreading waterproof roll etc., it is the steel that are related to, cement slurry, anti- It is conventional material (equipment) that water coagulation soil and anchor pole, which set mechanical equipment etc. used, and corresponding size is general type, Manufacture easy to process;And horizontal layout, quantity and the length of anchor pole can be adjusted according to condition of construction, pilot tunnel two sides initial stage branch Shield and the construction that the longitudinal pitch of interim type steel support can be adjusted flexibly according to construction monitoring situation and middle hole method breaks the whole up into parts Sequence is walked, construction risk can be utmostly reduced, applies the connection skill of prestressing force and new-old concrete interface by using jack Art realizes the effective connection for underpining system Yu existing Metro Station Structure, realizes that node region vertically carries effectively turning for system It changes, it is ensured that the structure safety of new and old subway station.
Pilot tunnel is excavated based on middle hole method and performs the system of underpining, and has been quickly completed the conversion of vertical carrying system, has greatly been dropped Tau-effect caused by the low wide open excavation construction of conventional group utmostly reduces new subway station closely or zero distance Pass through the adverse effect of existing metro station construction, effective regular partition domain be layered more pilot drives there are excavated sections it is small, apply The unfavorable factors such as work process is more, stress system conversion is frequent, accumulative sedimentation and deformation is obvious, have high economic benefit and social Benefit has wide practical use in the engineerings such as urban track traffic, railway, highway.
Detailed description of the invention
Fig. 1 is to create vertically to underpin force transfer system and excavation pilot tunnel floor plan.
Fig. 2 is intermediate pilot drive and steel column diagrammatic cross-section.
Fig. 3 is pilot drive and support system schematic diagram.
Fig. 4 underpins Column border node drawing with newly-built for steel column.
Fig. 5 is new subway station and existing subway station connecting node water proof structure figure.
In figure, 1- new subway station, the existing subway station 2-, 3-, which is created, underpins column, and pilot tunnel among 4-, 5- level is faced When fashioned iron stull, 6- steel column, 7- expand cushion cap foundation, 8- anchor pole, 9- steel mesh, 10- gunite concrete, the side 11- pilot tunnel, 12- top bar, 13- get out of a predicament or an embarrassing situation, 14- bolt, 15- profiled sheet, 16- epoxy adhesive, and 17-, which delays swollen property water-swellable, to be stopped Glue, the pre-buried slip casting steel pipe of 18-, 19- prespreading waterproof roll, 20- prespreading waterproof roll enhancement layer, 21- spiral, 22- locating support.
Specific embodiment
The utility model is described in detail With reference to embodiment.
The utility model relates to the systems that underpins that middle hole method zero distance passes through existing subway station, and new subway station 1 exists Existing 2 lower section zero distance of subway station is passed through, and has performed intermediate pilot tunnel 4 along 1 direction of new subway station in node region, intermediate 4 both lateral sides of pilot tunnel have performed side pilot tunnel 11 along existing 2 direction of subway station.Intermediate existing 2 side of subway station of 4 two ends of pilot tunnel Below wall, at existing 2 side wall of subway station of 11 two ends of side pilot tunnel and intermediate pilot tunnel 4 and existing subway in side pilot tunnel 11 It stands and has performed steel column 6 below 2 center pillars.Steel column 6 is arranged in the main vertical applied forces such as existing 2 center pillar of subway station or side wall Below component, the effective force that node region vertically carries system may be implemented.
Intermediate 4 two sides of pilot tunnel are provided with side wall shotcrete system, and including the anchor pole 8 set in side wall, 8 end of anchor pole is linked with Steel mesh 9 and gunite concrete.Before the pilot drive of side, set between 4 side wall of the steel column 6 in intermediate pilot tunnel 4 and intermediate pilot tunnel It is equipped with horizontal interim fashioned iron stull 5, horizontal interim fashioned iron stull 5 is welded and fixed with side wall shotcrete system.
It is straight to be no less than 5 times of reinforcing bars using two-sided welding and fusion length it is contemplated that using three spirals 21 for anchor pole 8 A centralizer, i.e. locating support 22 is arranged every 2m along 8 axis direction of anchor pole in diameter, secured with 21 welded steel of spiral, Guarantee that 21 position of spiral is accurate.
Steel mesh 9 uses grade III steel, and gunite concrete 10 uses C25 early strength concrete.Position erects horizontal among pilot tunnel Interim type steel support 5 is used as interim inverted arch.
6 bottom of steel column in intermediate pilot tunnel 4 below existing 2 center pillar of subway station, which is provided with, expands cushion cap foundation 7.It is existing 6 bottom of steel column below 2 center pillar of subway station is welded with the profiled sheet 15 for opening up screw hole, and is fixed to and is expanded by bolt 14 Big 7 top surface of cushion cap foundation, bolt 14 is using the cementing coagulation soil matrix for being fixed on expansion cushion cap foundation 7 of Chemical Felter and anchor adhesive In material.
New subway station 1 and existing 2 node region range of subway station, the setting of 1 four jiaos of new subway station also are provided with Steel column 6.Steel column 6 in node region pours in 1 interior main body structure side wall of new subway station or newly-built underpins column 3 Interior, i.e., during new subway station main structure pours, steel column 6 is not removed.It is newly-built to underpin 3 capital of column and existing subway After 2 bottom plates of standing do dabbing processing, rough surface is constituted to improve caking property, and be bonded by epoxy adhesive 16, and Multiple tracks is set in adhesive layer and delays swollen property water-swellable water-stop glue 17.
Above-mentioned zero distance passes through the construction method for vertically underpining system of existing subway station, comprising the following steps:
Step 1: the zero distance below existing subway station 2 of new subway station 1 is passed through, along newly-builtly in node region 1 direction of iron car station performs intermediate pilot tunnel 4, and intermediate pilot tunnel 4 erects steel column 6 into before hole below existing 2 side wall of subway station, Then intermediate pilot tunnel 4 is excavated using benching tunneling method, first excavates top bar 12, then excavated and get out of a predicament or an embarrassing situation 13, up/down steps mistake is away from control System carries out supporting to intermediate 4 two sides country rock of pilot tunnel in time in 3~5m, digging process, i.e., sets anchor pole to the interim side slope of side wall 8,15 degree of anchor pole inclination angle, then 8 end of anchor pole suspension steel mesh 9 and just pneumatically placed concrete, after 12 two sides surrounding rock supporting of top bar, and When perform horizontal interim type steel support 5, and with two sides preliminary bracing firm welding;
Step 2: when intermediate pilot tunnel 4 get out of a predicament or an embarrassing situation 13 circulations excavate near existing 2 center pillar of subway station when, existingly 2 center pillar position of iron car station performs the expansion cushion cap foundation 7 of 6 lower section of steel column in time, then sets up steel column 6, and steel column 6 is adopted With jack brace pre axial force, steel column 6 is made to be in effective pressured state, meet structure stress and underpins requirement;
Step 3: according to the support system of existing subway station 2 itself and main structure bottom girder distribution situation, continue out The soil body in front of center pillar is dug, and erects steel column 6 in time below existing 2 center pillar of subway station (or abutment wall), it is ensured that vertical power transmission System is reliable;
Step 4: the fashioned iron underpined below all existing 2 center pillars of subway station in 4 range of pilot tunnel among node region is completed Column 6 is constructed;
Step 5: side pilot tunnel 11 is performed along existing 2 direction of subway station in intermediate 4 both lateral sides of pilot tunnel, the pilot tunnel 11 in side At the 1 side wall position of new subway station of end, steel column 6 is set up in time;
Step 6: setting up steel column 6 to four angle point positions of node region, completes node region and vertically carries turning for system It changes, full-face tunneling then is carried out to the node region residue soil body, the stability of interim side slope is paid attention to during excavation;
Step 7: existing 2 lower section new subway station of subway station, 1 side wall and bottom plate are poured, node region is then poured Steel column 6 during 1 main structure concrete placings of new subway station, is directly cast in main structure by 1 column of new subway station In side wall or column, new subway station structure integral construction is completed.
After steel column 6 applies axle power using jack, in 3 casting process of column, steel column 6 is not torn open with jack It removes, it is ensured that vertically underpin the reliable power transmission of system.
It is to create to underpin column 3 that 1 column of new subway station built up is poured by steel column 6, it is contemplated that concrete coagulation is hard Phenomena such as cracking, removing, occurs often for creep and shrinkage phenomenon and the common stress interface of new-old concrete during change, pours newly-built Underpin repeatable pre-buried slip casting steel pipe 18 pre-buried at an upper portion thereof when column 3, internal pressure injection micro-expansion cement slurry, it is ensured that new and old Concrete interface concreting is closely knit.
Since 1 side wall of new subway station and existing 2 bottom plate linkage interface of subway station are a stress planes of weakness, outside Under load effect, since the generation in crack, development will lead to interface and destroy, causes waterproof roll 19 to break or be detached from and lose Waterproof action, therefore, the laying water-proof coiled material enhancement layer 20 at connection yin-yang angle, lap of splice L1, L2 is preferably greater than 1m, it is ensured that anti- Water layer, which closes up, to be located in 1 structure of new subway station.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are practical new by reading this Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model Cover.

Claims (8)

1. what a kind of middle hole method zero distance passed through existing subway station underpins system, it is characterised in that:
New subway station (1) zero distance below existing subway station (2) is passed through, along new subway station in node region (1) direction has performed intermediate pilot tunnel (4), and intermediate pilot tunnel (4) both lateral sides have performed side pilot tunnel along existing subway station (2) direction (11);
Intermediate pilot tunnel (4) two ends existing subway station (2) side wall lower section, side pilot tunnel (11) existing subway station of two ends (2) Steel column (6) have been performed at side wall and in intermediate pilot tunnel (4) and side pilot tunnel (11) below existing subway station (2) center pillar.
2. a kind of middle hole method zero distance according to claim 1 passes through the system that underpins of existing subway station, feature exists In:
Intermediate pilot tunnel (4) two sides are provided with side wall shotcrete system, and including the anchor pole (8) set in side wall, anchor pole (8) end is hung There is steel mesh (9) and spray and sets concrete.
3. a kind of middle hole method zero distance according to claim 2 passes through the system that underpins of existing subway station, feature exists In:
Before the pilot drive of side, level is provided between the steel column (6) and intermediate pilot tunnel (4) side wall in intermediate pilot tunnel (4) and is faced When fashioned iron stull (5), horizontal interim fashioned iron stull (5) is welded and fixed with side wall shotcrete system.
4. a kind of middle hole method zero distance according to claim 1 passes through the system that underpins of existing subway station, feature exists In:
Steel column (6) bottom in intermediate pilot tunnel (4) below existing subway station (2) center pillar, which is provided with, expands cushion cap foundation (7).
5. a kind of middle hole method zero distance according to claim 4 passes through the system that underpins of existing subway station, feature exists In:
Steel column (6) bottom below existing subway station (2) center pillar is welded with the profiled sheet (15) for opening up screw hole, and passes through Bolt (14), which is fixed to, expands cushion cap foundation (7) top surface, and bolt (14) is using Chemical Felter and anchor adhesive is cementing is fixed on expansion In the concrete substrate of big cushion cap foundation (7).
6. a kind of middle hole method zero distance according to claim 1 passes through the system that underpins of existing subway station, feature exists In:
Within the scope of new subway station (1) and existing subway station (2) node region, new subway station (1) quadrangle is provided with Steel column (6).
7. a kind of middle hole method zero distance according to claim 1 passes through the system that underpins of existing subway station, feature exists In:
Steel column (6) in node region pours in new subway station (1) interior main body structure side wall or newly-built underpins column (3) It is interior.
8. a kind of middle hole method zero distance according to claim 7 passes through the system that underpins of existing subway station, feature exists In:
It is newly-built to underpin column (3) capital and after existing subway station (2) bottom plate does dabbing processing, pass through epoxy adhesive (16) it is bonded, and multiple tracks is set in adhesive layer and delays swollen property water-swellable water-stop glue (17).
CN201820931507.2U 2018-06-15 2018-06-15 What a kind of middle hole method zero distance passed through existing subway station underpins system Active CN208605183U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108798681A (en) * 2018-06-15 2018-11-13 中铁第勘察设计院集团有限公司 What middle hole method zero distance passed through existing subway station underpins system and its construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108798681A (en) * 2018-06-15 2018-11-13 中铁第勘察设计院集团有限公司 What middle hole method zero distance passed through existing subway station underpins system and its construction method
CN108798681B (en) * 2018-06-15 2023-08-29 中铁第一勘察设计院集团有限公司 Underpinning system for zero-distance crossing existing subway station by middle-hole method and construction method thereof

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