CN105064397B - Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation - Google Patents

Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation Download PDF

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Publication number
CN105064397B
CN105064397B CN201510443110.XA CN201510443110A CN105064397B CN 105064397 B CN105064397 B CN 105064397B CN 201510443110 A CN201510443110 A CN 201510443110A CN 105064397 B CN105064397 B CN 105064397B
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China
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station
jurisdiction
column
tunnel
cut
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CN201510443110.XA
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Chinese (zh)
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CN105064397A (en
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张明聚
刘义
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北京工业大学
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Publication of CN105064397B publication Critical patent/CN105064397B/en

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Abstract

An open excavation construction method for expanding excavation of a station on a metro interzone shield tunnel foundation method includes the steps that uplift piles, wall columns, a base plate, a middle stand column foundation and transverse supporting beams between the wall columns are constructed in a transverse channel, wherein the base plate is connected with the bottoms of the wall columns, water prevention treatment is conducted, and the wall columns and duct pieces are connected, so that a sealed stress system is formed; soil over the tunnel is subjected to grouting reinforcement, an excavation retaining structure of a station body foundation bit is built, and the top end of the structure is connected with an external campshed or an underground diaphragm wall through a connection beam; slopes are supported through a composite soil nailing supporting technology, foot locking supports are erected at the pile foots, after excavation is conducted on the bottom of a foundation pit, residual duct pieces are removed, connection beams between the wall columns are constructed, and the connection beams are firmly connected with the duct pieces; the transverse support system is constructed. The method is reasonable, feasible and high in maneuverability. By means of application of the method, great economic benefits, social benefits and environmental benefits are achieved. The method has significant engineering application value and development prospects.

Description

A kind of open cutting construction method that station is digged on the basis of Subway Tunnel shield tunnel
Technical field
The present invention relates to a kind of structure and its open cutting construction method that station is digged on the basis of Subway Tunnel shield tunnel, Belong to track traffic technical field of construction.
Background technology
In the middle of numerous subway construction constructions, " shield method " is very fast, right with its working security height, speed of application The features such as surrounding environment influence is relatively small has obtained increasingly being widely applied in subway construction.However, conventional at home Interval shield construction in the middle of, the simple single running tunnel construction of form of fracture is only limitted to the use of shield, running into Shield miss the stop problem when, often first shield disassembled, hang out from current shield well, then proceed to another shield well, Shield is re-assemblied again, is constructed;Or in advance dig station, the width at station and bottom are enlarged, so Afterwards shield is drawn using dilatory equipment and missed the stop.No matter two kinds of modes of missing the stop can all cause Suporting structure from for which angle Utilization ratio is substantially reduced, and the disposable continuous driving distance for making shield method is greatly shortened.According to Beijing at present on several ground built Shield construction present situation statistics on iron wire road, the shield machine of a practice of construction removes the time of its work holdup in interval, and it is applied The work non-propulsion activity duration accounts for the 52.7% of total construction propulsion activity duration, and these non-propulsion constructions mainly exist including shield machine The construction of shield well when missing the stop, the assembling of going into the well of shield machine, disintegrate, hang out, transition, turn around, it is dilatory miss the stop, if again plus Work holdup situation of the upper shield machine in interval construction, the practice of construction speed of shield machine can be slower, and its utilization rate will be lower.This Outward, because present shield construction causes shield machine in construction period very flexible, its dismounting group repeatedly unloads dilatory missing the stop Etc. the service life of shield machine for substantially reducing.Meanwhile, launching shaft, received well, the construction of the well that turns around and shield machine Disintegrate, hang out, the extra operating expenses caused by transition etc., make the engineering cost cost in shield construction per km compared with shield The expense that machine is normally advanced is increased up to nearly 10% or so;And for the dilatory of shield machine misses the stop, be related to intensification and widen station The extra charge brought, about 6%~8% is increased per km.It can be seen that, the non-propulsion how effectively reduced in shield construction is made Industry construction is the key point of the utilization ratio problem for improving shield machine.
The content of the invention
Based on the problems referred to above, the present invention proposes a kind of structure that subway station is extended on the basis of Subway Tunnel shield tunnel And its open cutting construction method, its version is freely-supported framed wall pillar bilayer Metro Station Structure system.It adopts double going along with sb. to guard him Structure carries out retaining soil and water;Section of jurisdiction supporting is carried out using section of jurisdiction inner support system, unnecessary section of jurisdiction is removed, and utilize rectangle Steel plate and " L " shaped cast iron arch springing beam carry out longitudinal restraint to section of jurisdiction;In the transverse passage-way excavated out using subsurface excavation method, main body is constructed The base plate and central post strip footing and both walls intercolumniation cross-brace beam of structure, and carry out base plate and wall column, cross-brace beam Connection and between wall column;Excavation construction is carried out to station agent structure using cut and cover method, remaining unnecessary section of jurisdiction is removed, and is carried out The connection of coupling beam between section of jurisdiction and wall column;By the use of wall column system, side wall, central post constructed etc. as vertical of agent structure Support body system, by the use of the base plate constructed, middle plate, top board and cross-brace beam as the cross-brace system of agent structure.Its master Syllabus is to provide the new technology that subway station is built in a kind of underground railway engineering of employing shield construction, new method, To reduce the non-propulsion operation in the middle of shield-tunneling construction, the utilization ratio of Suporting structure is improved.It is existing that this method is mainly used in solution Under the conditions of, interval shield (is referred to for a diameter of 6m of Suporting structure of subway sectional tunnel or so, it is impossible to formed using its excavation Single shield tunnel enlarging subway station) non-propulsion operation is excessive in the middle of tunnel enlarging metro station construction, Suporting structure makes With the problem of inefficiency.
To achieve these goals, the technical solution used in the present invention is:
Step one:Construct in the range of subway station building enclosure A (as campshed plus water-stop curtain or underground are continuous planning to build Wall), the top of building enclosure 1 pours Guan Liang and in Guan Liang near the reserved sufficient length reinforcing bar in station side, its Guan Liang elevation of top Should be equal with ground elevation.The building-in depth of building enclosure should meet the requirement of resistance to overturning and Antiseepage stability;
Step 2:Subway sectional tunnel is applied using Suporting structure, the interim inner support system in section of jurisdiction is set up inside section of jurisdiction, The version of inner support system is gate type support structure, for the sake of construction and safety, each interim inner support system width Degree is a width of preferably with half section of jurisdiction, each endless tube piece construction period, it is ensured that at least support of the semi-ring section of jurisdiction in inner support system Under, and with the connection of longitudinal bracing rod member between adjacent interim inner support system;
Step 3:Designed openings position section of jurisdiction is removed, using the reserved steel of section of jurisdiction at rectangular steel plates and lower cut Muscle and built-in fitting are attached, and are carried out with the reserved steel bar and built-in fitting of section of jurisdiction at " L " shaped cast iron arch springing girder construction and upper cut Connection, longitudinal restraint is carried out to section of jurisdiction at upper cut, and water-proof concrete is poured between cast iron arch springing beam and section of jurisdiction to carry out Waterproof;
Step 4:Light section transverse passage-way excavation is carried out the soil body between parallel shield tunnel corresponding opening, soil excavation is treated After finishing, uplift pile, station base arrangement and wall column structure are constructed in transverse passage-way, apply wall column and the upper and lower otch in opening section of jurisdiction Place's node, pours both walls intercolumniation crossbeam, applies wall column and crossbeam node, and between the correspondence wall column of both sides temporary steel is set up Support.Together with station base plate is poured with wall column bottom and while pour station agent structure neutrality column foundation, neutral column foundation two Side is closely connected and reserved central post bottom cup-shaped recess and node connector with base plate;
Step 5:Grouting and reinforcing is carried out to transverse passage-way and the section of jurisdiction top soil body, in the range of excavation of foundation pit is drafted base is constructed Hole excavating structure B, and be attached building enclosure B with building enclosure A with coupling beam;
Step 6:Excavation pit inside the soil body until design bottom of foundation ditch elevation location, in digging process, in order to keep base The stability of hole side slope, is carried out supporting and is set up lock pin in footing position to support using compound soil nail support technology side slope, is Avoid impacting construction, lock pin is supported should be located at more than middle plate and meet pile body lateral stressed requirement;
Step 7:Remove remainder section of jurisdiction, install at upper cut " L " shaped cast iron arch springing beam and with set by wall column position Arch springing beam is welded, and rectangular steel plates welding at rectangular steel plates, with wall column is installed at lower cut, completes pouring for whole base arrangement Build, at the upper and lower opening of section of jurisdiction, construct coupling beam structure between wall column, apply constructing and in upper section for the opening upper and lower otch node in section of jurisdiction Point outside pours water-proof concrete with waterproof;
Step 8:The interim inner support system in section of jurisdiction is removed, inverted arch structure of constructing in shield tunnel;
Step 9:Temporary steel support between wall column is removed, station bottom side wall, central post is constructed, middle plate and platform slab is constructed;
Step 10:Construct station upper strata side wall, central post and top board.The backfill top board top soil body, recovers road surface.
Beneficial effect
A kind of structure and its open-cut that station is digged on the basis of Subway Tunnel shield tunnel proposed by the invention Method, the non-propulsion operation being effectively reduced in shield-tunneling construction, substantially increases the efficiency of construction of shield-tunneling construction, has both been shield The long distance driving of machine provides condition, and the also flexible selection for interchange of position provides possibility.Meanwhile, go along with sb. to guard him knot using double Structure, both ensure that the resistance to overturning of main structure body, also been removed the potential safety hazard hidden in work progress.Rectangular steel plates and The application of " L " shaped cast iron arch springing beam not only serves the effect of longitudinal restraint to the section of jurisdiction at opening, also causes section of jurisdiction and wall column And between section of jurisdiction and wall column coupling beam connecting node stress it is more reasonable, water-proofing treatment is simpler easy.The construction of transverse passage-way is The construction that takes the lead in of base plate creates condition, and used as one of the cross-brace of wall column, the construction of base plate strengthens the stability of wall column. Station main body adopts cut and cover tunneling, and construction is simple, quick, economical, safety, and cross-brace beam has been added between wall, can more preferably protect Wall column structure and stratum lateral stability between card node.Rationally, construction is reliably easy for the technology of the present invention, stress system conversion Simple clearly quality is easily controllable, will thoroughly change the conventional program that underground railway is built, and its construction application will be brought huge Economic benefit, social benefit and environmental benefit.
Description of the drawings
Fig. 1 is the subway station standard section profile digged on the basis of Subway Tunnel shield tunnel of the present invention, Fig. 2 For freely-supported framed wall pillar bilayer subway station three-dimensional structure diagram.
Fig. 3~Figure 14 is each construction way figure that Subway Tunnel shield tunnel of the present invention digs subway station.Wherein, Fig. 3 For bored pile (wall), building enclosure 1 and Guan Liang are constructed;Fig. 4 is that shield-tunneling construction is interval by station, and running tunnel AT STATION Interior placement shield duct piece;Fig. 5 is the installation inner support system in duct pieces of shield tunnel;Fig. 6 installs square to remove unnecessary section of jurisdiction Shape steel plate and " L " shaped cast iron arch springing beam, and pour water-proof concrete and carry out waterproof;Fig. 7 is to install in section of jurisdiction to prop up inside section of jurisdiction Support, laterally excavates transverse passage-way and pours uplift pile at correspondence section of jurisdiction opening;Fig. 8 is construction wall column and base plate, neutral column foundation, And temporary steel support is set up between wall column, and the upper lower node between wall column and section of jurisdiction is applied, pour the cross-brace of both walls intercolumniation Beam;Fig. 9 is grouting and reinforcing section of jurisdiction and transverse passage-way upper soil horizon and constructs building enclosure 2, to the He of building enclosure 1 at the Guan Liang of top Building enclosure 2 carries out coupling beam connection;Figure 10 is that foundation ditch in the range of station is excavated, the supporting when excavating;Figure 11 is continuation The soil body is excavated until designed elevation position, the remaining unnecessary section of jurisdiction of dismounting, longitudinal restraint is carried out to incision section of jurisdiction, and constructs wall column Between coupling beam be attached with otch section of jurisdiction;Figure 12 pours inverted arch structure to remove section of jurisdiction inner support system inside section of jurisdiction;Figure 13 To remove temporary steel support between wall column, bottom side wall, center pillar and middle plate are constructed;Figure 14 is to construct station hall layer side wall and central post, Pour top board structure, the backfill top board top soil body.
Figure 15 is transverse passage-way standard section profile.
In figure, 1, road surface, 2, building enclosure A, 3, Guan Liang, 4, shield duct piece, 5, wall column, 6, rectangular steel plates, 7, " L " shaped cast Iron arch springing beam, 8, water-proof concrete, 9, inverted arch, 10, base plate, 11, neutral column foundation, 12, grouting and reinforcing soil layer, 13, go along with sb. to guard him knot Structure B, 14, coupling beam, 15, anchor pole, 16, bottom central post, 17, cross-brace beam, 18, bottom side wall, 19, middle plate, 20, upper layer side Wall, 21, top layer central post, 22, top board, 23, backfill, 24, uplift pile, 25, Guan Liang, 26, interim inner support, 27, transverse passage-way, 28th, temporary steel support, 29, excavation of foundation pit steel shotcrete support, 30, platform slab, coupling beam between 31, wall column, 32, lock pin support, 33, soil Nail.
Specific embodiment
As shown in figures 1-15, across the subway station embodiment of shallow embedding bilayer two under a urban road of the invention, adopts The present invention a kind of cut and cover tunneling engineering method that station is digged on the basis of Subway Tunnel shield tunnel apply, its agent structure by The base plate 10 of cast-in-situ steel reinforced concrete, middle plate 19, top board 22, bottom side wall 18, upper strata side wall 20, wall column 5, shield duct piece 4, horizontal stroke (its structure composition is as shown in Figure 1) is constituted to the bottom central post 16 of support beam 17, top layer central post 21, its structure top thickness of earth covering 5.5m, excavated section size is 12m × 20.5m.With reference to accompanying drawing, the construction way of the present invention is further described in detail.
The construction that subway station is digged on the basis of Parallel Interval shield tunnel of the present embodiment its construction way is:
Step one:Stake is filled punching in the range of subway station is planned to build, building enclosure A2 is constructed, is poured at the top of building enclosure A2 Build Guan Liang 3 and in Guan Liang 3 near the reserved sufficient length reinforcing bar in station side;
Step 2:Subway sectional tunnel is applied using Suporting structure, shield duct piece 4 is installed AT STATION in running tunnel, and The interim inner support 26 in section of jurisdiction is set up inside shield duct piece 4;
Step 3:Design opening portion section of jurisdiction, using the reserved steel bar of section of jurisdiction at rectangular steel plates 6 and lower cut and pre- Embedded part is attached, and is attached with the reserved steel bar and built-in fitting of section of jurisdiction at " L " shaped cast iron arch springing beam 7 and upper cut, with right Section of jurisdiction carries out longitudinal restraint at upper cut, and water-proof concrete 8 is poured between cast iron arch springing beam and section of jurisdiction carries out waterproof;
Step 4:Light section transverse passage-way 27 is carried out the soil body between parallel shield tunnel corresponding opening to excavate,
Step 5:After soil excavation is finished, pour station base plate 10 and wall column 5 in the transverse passage-way 27, apply wall column 5 with Shield duct piece incision node about 4, pours cross-brace beam 17, wall column 5 and the node of cross-brace beam 17 is applied, in wall column 5 Between set up temporary steel support 28.Together with the base plate 10 at station is poured with the bottom of wall column 5 and while pour station agent structure Neutral column foundation 11, the both sides of neutral column foundation 11 are closely connected and reserved central post bottom cup-shaped recess and node connection with base plate 10 Part;
Step 6:Grouting and reinforcing is carried out to transverse passage-way and section of jurisdiction top soil layer, in the range of excavation of foundation pit is drafted base is constructed Hole excavating structure B13, and be attached building enclosure B13 with building enclosure A2 with coupling beam 14;
Step 6:Excavation pit inside the soil body until design bottom of foundation ditch elevation location, in digging process, using composite earth Nail supporting carries out supporting to excavation pit and sets up lock pin support 32 in footing position, to avoid affecting construction, lock pin to support 32 Position is located at middle plate more than 19;
Step 7:Remove remainder section of jurisdiction, install at upper cut " L " shaped cast iron arch springing beam 7 and with wall column position institute If arch springing beam is welded, rectangular steel plates 6 at rectangular steel plates, with wall column are installed at lower cut and are welded, complete whole base arrangement Pour, at the upper and lower opening of section of jurisdiction, construct coupling beam 31 between wall column, apply opening section of jurisdiction upper and lower otch node and construct and upper Node outside pours water-proof concrete 8 with waterproof;
Step 8:The interim inner support 26 in section of jurisdiction is removed, the structure of inverted arch 9 of constructing in shield tunnel;
Step 9:Temporary steel support 28 between wall column is removed, station bottom side wall 18, central post 16 is constructed, middle plate 19 is constructed And platform slab 30;
Step 10:Construct station upper strata side wall 20, central post 21 and top board 22.The backfill top board top soil body 23, recovers road Face 1.
11st step:The construction of this job step is completed, next step construction is carried out.
Building enclosure A2 adds water-stop curtain or continuous underground wall structure for campshed, and hat is poured at the top of building enclosure A2 Beam 3, the elevation of top of Guan Liang 3 is equal with the absolute altitude of ground 1.Building enclosure A2 building-in depth should meet resistance to overturning and Antiseepage stability Property require;The Shield, it is characterised in that its section of jurisdiction external diameter is 6m or so, it is impossible to extended using single shield tunnel Subway station;Shield duct piece 4 is installed, it is characterised in that the shield duct piece 4 installed is straight joint in the running tunnel AT STATION Splicing, and strengthen the connection of the ring between section of jurisdiction;The interim inner support 26 in section of jurisdiction is set up inside shield duct piece 4, what is set up is interim Inner support 26 is for convenience of the gate type support structural system constructed.For the sake of construction and safety, each interim inner support system 26 width are a width of preferably with half section of jurisdiction, each endless tube piece construction period, it is ensured that at least semi-ring section of jurisdiction is in inner support system Under support, and with the connection of longitudinal bracing rod member between adjacent interim inner support system.
The rectangular steel plates 6, its longitudinal stretching rigidity is sufficiently large, to constrain section of jurisdiction demolishing process in occur longitudinal direction from Dissipate;" L " shaped cast iron arch springing beam 7 should have enough bending stiffnesses in addition to longitudinal stretching rigidity is met, also, to meet connection stiffness Demand.
The light section transverse passage-way 27, it is bordered by position with section of jurisdiction should be arranged between wall column construction working, workplace top mark Height should be higher than that wall column 20~30cm of elevation of top, and transverse passage-way elevation of bottom should be no less than wall column elevation of bottom, and its excavation width is big In or equal to the width of a wall column;The uplift pile 24 constructed in the transverse passage-way 27, its foundation stabilization intensity should meet substrate Loading test standard.
Building enclosure B13 is underground continuous wall-enclosure structure;It is described to transverse passage-way 27 and the top soil layer of shield duct piece 4 Improved, its improvement scope does not do concrete norm depending on concrete soil body condition.Coupling beam 14 between the building enclosure, its top Portion's absolute altitude is not higher than ground elevation;The building enclosure B13 bottom and the interior water-proof concrete 8 for pouring of " L " shaped cast iron arch springing beam 7 It is connected, and should takes measures to avoid the node to constructing from causing compared with large disturbances.
In the step 7, " L " the shaped cast iron arch springing beam 7 should be with section of jurisdiction reserved steel bar and built-in fitting with rectangular steel plates 6 It is fastenedly connected.
The height of inverted arch 9 for pouring meets gauge requirement when normally running by train and the design height of wall column 5 sets It is fixed.
The central post 16 is concrete filled steel tube central post.
Described its version of main body station is freely-supported framed wall pillar bilayer Metro Station Structure system.
Be more than the present invention an exemplary embodiments, the present invention enforcement not limited to this.

Claims (9)

1. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel, it is characterised in that:Specifically apply Work step is suddenly,
Step one:Construct in the range of subway station building enclosure A (2) planning to build, building enclosure A (2) top pour Guan Liang (3) and In Guan Liang (3) near the reserved sufficient length reinforcing bar in main body station side;
Step 2:Subway sectional tunnel is applied using Suporting structure, installation shield duct piece (4) in running tunnel AT STATION, and Section of jurisdiction inside sets up the interim inner support (26) in section of jurisdiction;
Step 3:Design opening portion section of jurisdiction, using the reserved steel bar of section of jurisdiction at rectangular steel plates (6) and lower cut and pre-buried Part is attached, and is attached with the reserved steel bar and built-in fitting of section of jurisdiction at " L " shaped cast iron arch springing beam (7) and upper cut, with right Section of jurisdiction carries out longitudinal restraint at upper cut, and water-proof concrete (8) is poured and section of jurisdiction between in " L " shaped cast iron arch springing beam (7) enters Row waterproof;
Step 4:Light section transverse passage-way (27) excavation is carried out the soil body between parallel shield tunnel corresponding opening, soil excavation is treated After finishing, uplift pile, station base arrangement (10) and wall column (5) are poured in light section transverse passage-way (27), apply wall column and open The upper and lower incision node in mouth section of jurisdiction, pours support beam between wall column (17), wall column and support beam node is applied, between wall column Set up temporary steel support (28);Together with station base arrangement (10) is poured with wall column (5) bottom and while pour station main body Architecture neutral column foundation (11), neutral column foundation (11) both sides are closely connected and reserved central post bottom with station base arrangement (10) Portion's cup-shaped recess and node connector;
Step 5:Grouting and reinforcing is carried out to light section transverse passage-way (27) and shield duct piece (4) top soil layer, is drafted in excavation of foundation pit In the range of construct excavation of foundation pit building enclosure B (13), and building enclosure B (13) is carried out with building enclosure A (2) with coupling beam (14) Connection;
Step 6:Excavation pit inside the soil body until design bottom of foundation ditch elevation location, in digging process, in order to ensure excavate side The stability on slope, is carried out supporting to excavation slope and is set up lock pin in footing position to support using compound soil nail support technology (32), lock pin to support (32) should be located at more than middle plate (19) and meet the lateral stressed balance requirement of pile body;
Step 7:Remove remainder section of jurisdiction, install at upper cut " L " shaped cast iron arch springing beam (7) and with set by wall column position Cast iron arch springing beam is welded, and rectangular steel plates (6) welding at rectangular steel plates, with wall column is installed at lower cut, completes whole base plate Pouring for structure, at the upper and lower opening of section of jurisdiction, constructs coupling beam between wall column (31), applies pouring for the opening upper and lower otch node in section of jurisdiction And water-proof concrete is poured on the outside of upper node with waterproof;
Step 8:The interim inner support (26) in section of jurisdiction is removed, inverted arch (9) structure of constructing in shield tunnel;
Step 9:Temporary steel support (28) between wall column is removed, station bottom side wall (18), central post (16), plate in construction is constructed And platform slab (30) (19);
Step 10:Station upper strata side wall (20), central post (21) and top board (22) are constructed, main body station is formed;On backfill top board Portion's soil body, recovers road surface (1).
2. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step one, building enclosure A (2) is campshed plus water-stop curtain, or continuous underground wall structure, Guan Liang (3) is poured at building enclosure A (2) top, Guan Liang (3) elevation of top is equal with road surface (1) absolute altitude.
3. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 2, shield duct piece (4), the shield duct piece installed are installed in the running tunnel AT STATION (4) it is straight joint splicing, and strengthens the connection of the ring between section of jurisdiction;The interim inner support (26) in section of jurisdiction is set up inside shield duct piece (4), The interim inner support (26) for being set up is for convenience of the gate type support structural system constructed.
4. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 4, the light section transverse passage-way (27), it is bordered by position and should arrange wall column construction work with section of jurisdiction Between work, workplace elevation of top should be higher than that wall column 20~30cm of elevation of top, and light section transverse passage-way (27) elevation of bottom should be many In wall column elevation of bottom, width of its excavation width more than or equal to a wall column;Construct in the light section transverse passage-way (27) Uplift pile (24), its foundation stabilization intensity should meet base bearing capacity examination criteria.
5. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 5, building enclosure B (13) is underground continuous wall-enclosure structure;Between the building enclosure Coupling beam (14), its elevation of top is not higher than ground elevation;Building enclosure B (13) bottom is interior with " L " shaped cast iron arch springing beam (7) The water-proof concrete (8) for pouring is connected.
6. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 7, " L " shaped cast iron arch springing beam (7) and rectangular steel plates (6) should with section of jurisdiction reserved steel bar and Built-in fitting is fastenedly connected.
7. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 8, the inverted arch (9) for pouring meets gauge requirement and wall column when highly normally running by train (5) design height setting.
8. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 9, the central post (16) is concrete filled steel tube central post.
9. a kind of cut and cover tunneling method that station is digged on the basis of Subway Tunnel shield tunnel according to claim 1, It is characterized in that:In the step 10, described its version of main body station is freely-supported framed wall pillar bilayer subway station knot Structure system.
CN201510443110.XA 2015-07-26 2015-07-26 Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation CN105064397B (en)

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CN105862914B (en) * 2016-04-18 2018-03-09 西南交通大学 A kind of method separated ground additional load and influenceed on bottom proximity tunnel
CN108951652B (en) * 2018-08-08 2020-08-14 黑龙江龙捷市政轨道交通工程有限公司 Bridge-tunnel connection section deep foundation pit supporting structure and construction method
CN109183848B (en) * 2018-08-10 2019-06-21 广东省建工设计院有限公司 A kind of Tunnel Design and building method
CN110424398A (en) * 2019-07-03 2019-11-08 中铁一局集团厦门建设工程有限公司 Across existing shield section open-cut engineering method in zero distance
CN110593900B (en) * 2019-08-26 2021-03-23 中铁三局集团有限公司 Construction method for close-range superposed shield interval of open-cut tunnel in spring development urban area

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JP2007303155A (en) * 2006-05-11 2007-11-22 Shimizu Corp Construction method of underground cavity and tunnel construction method
CN101725155A (en) * 2009-12-02 2010-06-09 李宪奎 Multi-direction rotary jetting stirring grouting reinforcement construction method for constructing underground structure and soil body by cover excavation and underground excavation and supporting structure thereof
CN102392648A (en) * 2011-10-12 2012-03-28 北京市轨道交通建设管理有限公司 Method for building subway station by expansively digging large-diameter shield tunnel
CN103277110A (en) * 2013-05-13 2013-09-04 中铁十四局集团有限公司 Construction method of overlapped shield tunnel
CN103266896B (en) * 2013-05-24 2015-05-20 上海市城市建设设计研究总院 Construction method for shield tunneling machine retaining structure taking position firstly and being constructed secondly and for shield shaft excavation

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