CN109208642A - A kind of construction method of assembled under-traverse tunnel - Google Patents

A kind of construction method of assembled under-traverse tunnel Download PDF

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Publication number
CN109208642A
CN109208642A CN201811377724.2A CN201811377724A CN109208642A CN 109208642 A CN109208642 A CN 109208642A CN 201811377724 A CN201811377724 A CN 201811377724A CN 109208642 A CN109208642 A CN 109208642A
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CN
China
Prior art keywords
plate
segment
construction
tunnel
assembled
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CN201811377724.2A
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Chinese (zh)
Inventor
田宝华
王义春
刘延龙
黄静
谭斌
奚成
张长春
胡志勇
林晓波
刘雪松
王智
周全文
李鹏
徐闯
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中铁二十三局集团有限公司
中铁二十三局集团轨道交通工程有限公司
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Application filed by 中铁二十三局集团有限公司, 中铁二十三局集团轨道交通工程有限公司 filed Critical 中铁二十三局集团有限公司
Priority to CN201811377724.2A priority Critical patent/CN109208642A/en
Publication of CN109208642A publication Critical patent/CN109208642A/en

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/045Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/16Arrangement or construction of joints in foundation structures

Abstract

The invention discloses a kind of construction methods of assembled under-traverse tunnel, comprising the following steps: a, constructs concrete foundation in bottom of foundation ditch, and rail is arranged on it;B, after being hoisted to bottom plate on rail in place, to just falling above handling top plate to bottom plate, individual tunnel segment is formed after bottom plate and top plate are attached assembled cyclization;C, pushing tow after subsequent section assembling cyclization is extremely bonded with previous segment, and multiple segments is subjected to formation hole segment after longitudinal permanent prestressing force compresses;D, step b and c are repeated and forms multiple hole segments, subsiding crack is set between adjacent holes segment;E, assembled to be in the milk after the completion to the gap between segment bottom plate and concrete foundation.Construction method of the present invention can ensure that under-traverse tunnel is assembled and orderly carry out, and ensure the construction quality of entire under-traverse tunnel, while accelerating under-traverse tunnel assembly progress, improve construction efficiency, greatly save engineering cost.

Description

A kind of construction method of assembled under-traverse tunnel
Technical field
The present invention relates to under-traverse tunnel construction field, in particular to a kind of construction method of assembled under-traverse tunnel.
Background technique
With the quickening of urbanization process and the maturation of city road network, the rapid transformation of the old road in city is become It obtains increasingly important.In the rapid transformation of road, setting under-traverse tunnel is more scientific one of road structure, it, which has, saves The simple and beautiful advantage of ground space, overall effect, therefore be widely used.Due to carrying out under-traverse tunnel to existing road Transformation is carried out in existing city road network, so the construction period of construction is very stringent, to reduce to townie interference.
To solve the problems, such as that the under-traverse tunnel construction period is longer, it is proposed that the design of assembled under-traverse tunnel, tunnel master Body is mainly single-store frame formula cast-in-place structural, and another includes the building industrialization assembled assembly section of certain length.As shown in Figure 1, For the ease of transport and assembly, individual tunnel segment has been divided into two piecemeals, the respectively top plate 2 of the bottom plate 1 of W type and M type, Three straight walls are correspondingly provided on bottom plate and top plate, two piecemeal combinations can form the structure of individual tunnel segment, then will Multiple tunnel sections can form under-traverse tunnel assembly section, have the advantages that structure is simple, quick construction.
But when carrying out the construction of entire under-traverse tunnel, guarantee that assembled relationship between quality will arrive the height of Inspection of Tunnel Quality, And guarantee whether construction efficiency adapts to the rapid transformation demand in city road network to it, therefore, for tunneling under assembled The structure in road, how prefabricated piecemeal to be preferably assembled into entire tunnel at the construction field (site) is to have to solve the problems, such as.
Summary of the invention
Present invention aims at: it is how that prefabricated piecemeal is assembled at the construction field (site) for the structure of assembled under-traverse tunnel The problem of at entire tunnel, provides a kind of construction method of assembled under-traverse tunnel, can ensure by using the construction method The construction quality of entire under-traverse tunnel, while under-traverse tunnel assembly progress is accelerated, construction efficiency is improved, engineering cost is saved.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of construction method of assembled under-traverse tunnel, comprising the following steps:
A, in bottom of foundation ditch construction concrete foundation, and setting is longitudinal along tunnel at position corresponding with tunnel straight wall The rail of extension;
B, by bottom plate be hoisted on rail it is in place after, above handling top plate to bottom plate to just fall it is in place after, by bottom plate and Top plate forms individual tunnel segment after being attached assembled cyclization;
C, pushing tow after subsequent section assembling cyclization is extremely bonded with previous segment, and multiple segments is subjected to longitudinal direction forever Long prestressing force forms hole segment after compressing;
D, step b and c are repeated and forms multiple hole segments, subsiding crack is set between adjacent holes segment;
E, it after the completion of tunnel assembly, is in the milk to the gap between segment bottom plate and concrete foundation.
By constructing in bottom of foundation ditch concrete foundation and rail is arranged in construction method of the present invention, both provides tunnel segment Support, and moved convenient for tunnel segment in assembly along rail;After handling bottom plate and top plate are closed up, and by bottom plate and top plate into Row connection assembly circularizes into individual tunnel segment;By the way that pushing tow after subsequent section assembling cyclization is pasted to previous segment It closes, after segment reaches certain amount, forms hole segment after multiple segments are carried out longitudinal permanent prestressed stretch-draw, and in adjacent holes Subsiding crack is set between segment, so that tunnel assembly section to be divided into the hole segment of several rigidity, it is heavy that ground can be better adapted to Drop;In tunnel after the completion of assembly, it is in the milk between segment bottom plate and concrete foundation, increases segment bottom plate and coagulation soil matrix Contact area between plinth, so that the support of tunnel segment is more firm;The construction method can ensure under-traverse tunnel assembly orderly into Row, and ensure the construction quality of entire under-traverse tunnel, while accelerating under-traverse tunnel assembly progress, construction efficiency is improved, significantly Save engineering cost.
As a preferred solution of the present invention, the concrete foundation construction in step a is followed successively by construction of waterproof layer and reinforcing bar is mixed Solidifying soil construction, is poured concrete cushion in rail after the installation is completed, pours top surface and be slightly below rail level.By the way that concrete foundation is applied Work is divided into construction of waterproof layer and reinforced concrete construction, can be improved the waterproof performance of segment bottom plate after construction waterproof layer, Reinforced concrete construction can be improved the bearing capacity on entire basis;It is poured after rail is installed on armored concrete simultaneously Concrete cushion, and pour top surface and be slightly below rail level, location of rail can be made to keep accurate stable, and convenient for tunnel section in assembly Section is moved along rail.
As a preferred solution of the present invention, in step b before top plate and bottom plate close up, shearing resistance need to be set in horizontal joint face Structure and waterproof construction, top plate and bottom plate are carried out press-in connection by setting vertical prestressing after top plate accurate positionin, and are being pushed up The straight wall two sides of plate and bottom plate setting clamping plate is attached clamping.By top plate and bottom plate joint face be arranged shear structure and Waterproof construction, it is vertical pre- due to being provided between top plate and bottom plate to improve the shear behavior and waterproof performance after the two assembly Stress guarantees that two components with respect to the changing of the relative positions and will not have certain contact pressure, and is incorporated in top plate and bottom plate straight wall two sides Clamping plate connection, so that it is whole to form a rigidity after individual tunnel section assembling.
As a preferred solution of the present invention, the shear structure is shearing resistance steel case, and it is perpendicular that the shearing resistance steel case is set to top plate Between wall and bottom plate straight wall, with improve top plate and bottom plate close up after shear resistance.
As a preferred solution of the present invention, the waterproof construction is the epoxide-resin glue in joint face brushing, further includes peace Longitudinal twice water expandable waterstop of dress, to improve the waterproof performance of top plate and bottom plate faying face.
As a preferred solution of the present invention, in the end face that is combined longitudinally of adjacent segment, to be provided with sealing rod reserved in step c Slot and yin-yang tenon tooth, convenient for being combined longitudinally face installation sealing rod, and yin-yang tenon tooth docks convenient for the assembled of adjacent segment, together When also there is certain shear resistance.
As a preferred solution of the present invention, stop promoting when subsequent segment is close to previous segment in step c, check two sections Whether the distance between section end face is consistent, in segment Mosaic face brushwork epoxy resin adhesive after meeting the requirements, and installs bipassage ring To water expandable waterstop, to improve the waterproof performance that adjacent segment is combined longitudinally end face.
As a preferred solution of the present invention, in step c after subsequent segment pushing tow extremely fits with previous segment, with Previous segment passes through longitudinal interim prestressing force together and compresses, and will install segment and has been closely joined together, has played fixed-segment Effect, guarantee before permanent prestressed stretch-draw, between segment will not the mutual changing of the relative positions, while provide colloid condensation needed for pressure.
As a preferred solution of the present invention, settlement slot setting bilayer waterstop in step d, respectively sets in structure upstream face It sets copper sheet waterstop, back sticking type groutable rubber fastening band is set in structure back side.
As a preferred solution of the present invention, bottom plate and top plate in a pre-installation, are applied in structural outer surface brushing polyurethane water-proof Material.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, by constructing in bottom of foundation ditch concrete foundation and rail is arranged in construction method of the present invention, both mentions to tunnel segment It is moved for support, and convenient for tunnel segment in assembly along rail;After handling bottom plate and top plate are closed up, and by bottom plate and top plate It is attached assembly and circularizes into individual tunnel segment;By by pushing tow after subsequent section assembling cyclization to previous segment Fitting forms hole segment after multiple segments are carried out longitudinal permanent prestressed stretch-draw, and adjacent after segment reaches certain amount Subsiding crack is arranged between segment in hole, so that tunnel assembly section to be divided into the hole segment of several rigidity, can better adapt to ground Sedimentation;In tunnel after the completion of assembly, it is in the milk between segment bottom plate and concrete foundation, increases segment bottom plate and concrete Contact area between basis, so that the support of tunnel segment is more firm;The construction method can ensure that under-traverse tunnel is assembled orderly It carries out, and ensures the construction quality of entire under-traverse tunnel, while accelerating under-traverse tunnel assembly progress, improve construction efficiency, greatly It is big to save engineering cost;
2, it is divided into construction of waterproof layer and reinforced concrete construction by the way that concrete foundation is constructed, after construction waterproof layer It can be improved the waterproof performance of segment bottom plate, reinforced concrete construction can be improved the bearing capacity on entire basis;Simultaneously in steel It is poured concrete cushion after rail is installed on reinforced concrete, top surface is poured and is slightly below rail level, location of rail can be made to keep Accurate stable, and moved convenient for tunnel segment in assembly along rail;
3, shear structure and waterproof construction are arranged by the joint face in top plate and bottom plate, it is anti-after the two assembly to improve Performance and waterproof performance are cut, due to being provided with vertical prestressing between top plate and bottom plate, guarantees that two components will not be with respect to the changing of the relative positions It with certain contact pressure, and is incorporated in top plate and is connected with the clamping plate of bottom plate straight wall two sides, so that individual tunnel section assembling It is whole that a rigidity is formed afterwards;
4, by the way that after fitting with previous segment, longitudinal direction need to be carried out together with previous segment in subsequent segment pushing tow Interim prestressed stretch-draw will have been installed segment and be closely joined together, can both play the role of fixed-segment, guarantee permanent Before prestressed stretch-draw, between segment will not the mutual changing of the relative positions, while provide colloid condensation needed for pressure.
Detailed description of the invention
Fig. 1 is the tunnel segment segmented construction figure in the present invention.
Fig. 2 is top plate and the assembled cyclic schematic diagram of bottom plate in the present invention.
Fig. 3 is top plate and bottom plate connection schematic diagram in the present invention.
Fig. 4 is the B-B cut-away illustration in Fig. 3.
Fig. 5 is that the first segment in the present invention is fixed and two sections draw schematic diagram over to one's side.
Fig. 6 is the segment pushing tow assembling schematic diagram in the present invention.
Fig. 7 is the waterproofing of movement joints plan of establishment schematic diagram in the present invention.
Fig. 8 is the deformation joint side wall and waterproof slab scheme schematic diagram in the present invention.
Fig. 9 is the deformation joint top waterproof project schematic diagram in the present invention.
Figure 10 is the link assembly flow chart in the present invention.
Figure 11 is the entire assembled section construction process figure in the present invention.
Appended drawing reference: 1- bottom plate, 2- top plate, 3- shearing resistance steel case hole to be provided, 4- sealing rod groove, 5- tenon tooth, 6- are longitudinally pre- Stress hole to be provided, 7- footstock plate, 8- fining twisted steel, 9- shearing resistance steel case, 10- is to position mould, 11- jack, 12- pre-buried steel Plate, 13- clamping plate, 14- sealing rod, 15- bolt, 16- madjack pipe, 17- Cast-in-Situ Segment, 18- hold-down support, 19- lifting lug, 20- rod iron, 21- connector, 22- nut, 23- punching jack, 24- rail, 25- prestressing tendon, 26- anchorage, 27- subsiding crack, the hole 28- section Section, 29- hound, the flat connecting rod of 30-, 31- clamp rail support, 32- concrete post-cast strip, 33- rigid plastics foam plate, 34- epoxy resin Coating finished product reinforcing bar, 35- copper sheet waterstop, 36- back sticking type groutable rubber fastening band, 37- pitch.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.
Embodiment
The present embodiment provides a kind of construction methods of assembled under-traverse tunnel;
The construction method of assembled under-traverse tunnel in the present embodiment, comprising the following steps:
A, in bottom of foundation ditch construction concrete foundation, and setting is longitudinal along tunnel at position corresponding with tunnel straight wall The rail of extension;
B, after being hoisted to bottom plate 1 on rail in place, after handling top plate 2 to bottom plate top is to just falling in place, by bottom plate Individual tunnel segment is formed after being attached assembled cyclization with top plate;
It c,, will after segment reaches certain amount by pushing tow after subsequent section assembling cyclization to being bonded with previous segment Multiple segments carry out forming hole segment 28 after longitudinal permanent prestressing force compresses;
D, step b and c are repeated and forms multiple hole segments, subsiding crack 27 is set between adjacent holes segment;
E, it after the completion of tunnel assembly, is in the milk to the gap between segment bottom plate and concrete foundation.
By constructing in bottom of foundation ditch concrete foundation and rail is arranged in construction method of the present invention, both provides tunnel segment Support, and moved convenient for tunnel segment in assembly along rail;After handling bottom plate and top plate are closed up, and by bottom plate and top plate into Row connection assembly circularizes into individual tunnel segment;By the way that pushing tow after subsequent section assembling cyclization is pasted to previous segment It closes, after segment reaches certain amount, forms hole segment after multiple segments are carried out longitudinal permanent prestressed stretch-draw, and in adjacent holes Subsiding crack is set between segment, so that tunnel assembly section to be divided into the hole segment of several rigidity, it is heavy that ground can be better adapted to Drop;In tunnel after the completion of assembly, it is in the milk between segment bottom plate and concrete foundation, increases segment bottom plate and coagulation soil matrix Contact area between plinth, so that the support of tunnel segment is more firm;The construction method can ensure under-traverse tunnel assembly orderly into Row, and ensure the construction quality of entire under-traverse tunnel, while accelerating under-traverse tunnel assembly progress, construction efficiency is improved, significantly Save engineering cost.
Tunnel segment segmented construction in the present embodiment is as shown in Figure 1, include the bottom plate 1 of W type and the top plate 2 of M type, the bottom of at Three straight walls are correspondingly provided on plate and top plate, two piecemeal combinations can form the structure of individual tunnel segment.In 1 He of bottom plate It is equipped with shearing resistance steel case hole to be provided 3 in the straight wall of top plate 2, sealing rod groove 4 and tenon tooth 5 are equipped in bottom plate and top plate end face, the bottom of at Longitudinal prestressing hole to be provided 6 is additionally provided on plate and top plate.
In the present embodiment, when carrying out the concrete foundation construction in step a, according to design requirement, three under bottom plate 1 Straight wall lower position does three row's strip concrete foundations by absolute altitude and the gradient digging of calculating, and about 132 meters of length, setting is pre- above Buried plate installs three groups of rail 24, main for carrying precast frame including the following steps:
A1, foundation trench unwrapping wire excavate: excavating and complete in precast frame section pit earthwork, after substrate meets condition, use total station Excavation line is discharged out by the relative dimensions of designed path route and cutting depth carries out excavation foundation trench.
A2, base plate waterproofing construction: the construction of 10cm thickness C15 concrete cushion is first carried out, to blinding concrete dry tack free Afterwards, laying water-proof coiled material to protect base plate waterproofing not to be damaged pours the C25 microlith of 5cm thickness on waterproof roll as required Concrete.
A3, reinforced concrete foundation construction: after having bound reinforcing bar by design, three groups of orbital positions pre-buried 70 × 10 × The steel plate of 1cm is spaced 60cm/ block, flushes with basic top surface;Then branching standing template pours C25 concrete and conserves.
A4, rail installation: boring the hole of a Φ 30mm on the web below rail head at interval of 4 meters before rail installation, with It is standby from bottom plate mud jacking when mortar can flow between two rails.It is put into drift in groups on pre-buried backing plate by measurement data, utilizes drift The absolute altitude and the gradient for adjusting three groups of rail, are allowed to meet design requirement;Rail positioning after fixed with pressing plate, and in time by pressing plate, Drift and pre-embedded steel slab firm welding.
A5, rail are poured concrete cushion after the installation is completed, and range of the bed course between every group of rail reserves slim very heavy Heights of roofs, the position close to rail reserves the hole height of holes opened up on rail, to reserve slip casting channel, remaining position top surface ratio The low 2cm of rail level, and guarantee smooth.
As shown in figs 2-4, it is mainly comprised the steps that when the assembled cyclization of top plate and bottom plate in the present embodiment step b
B1, assembling combination: it with gantry crane by above prefabricated components handling to installation site, is put between crown beam bracing members Eight cable wind ropes are arranged in foundation pit on component lifting lug and clamping plate bolt, and each four of top and bottom are controlled by manpower, hung Prevent component from colliding in dress and gantry crane moving process.When whereabouts first by the cable wind rope of bottom four put to foundation pit steel support with Under, it is swung by four, top cable wind rope control member.It is converted to when component bottom surface is lower than foundation pit steel support by the cable of bottom surface four The control of wind rope.First lifting base plate member is in place, is slowly moved when bottom plate is hoisted to apart from rail 2cm by gantry crane, will Bottom plate falls to positive predeterminated position in place.Installation is to position mould 10 and footstock plate 7 on straight wall upper end clamping plate bolt 15, in level It is inserted into shearing resistance steel case 9 in faying face, connector of finish rolling thread steel 21 is installed, connection top φ 32fpk930 is for prestressed concrete Fining twisted steel 8, then to lift with gantry crane top plate in the same way in place to just falling.Top plate falls on after a suspension hook does not stress and examines The flatness for looking into top plate Yu bottom plate end face installs jack 11 if overproof between upper and lower footstock plate and jacks up top plate, in level In seam plus steel plate gasket adjusts, then falls and re-measure, and jacks up cushioning measurement repeatedly until meeting required precision.
B2, seam waterproof: before top plate 2 and bottom plate 1 close up, in joint face brushwork epoxy resin glue, and longitudinal twice are installed Water expandable waterstop 14.First bi-component is mixed and is stirred by test proportion before gluing, can be adjusted according to the actual situation The component of curing agent, it is ensured that process time.To reduce influence of the weather to construction, movement can be set up on build-up area top when necessary Rain-proof shelter.
B3, initial tensioning: after top plate is accurately positioned, installation JLM-32 anchorage anchoring is carried out single using YCW60B type jack Ring just opens (tensioning vertical prestressing), guarantees that top plate and bottom plate will not condense required pressure with respect to the changing of the relative positions and offer colloid.
B4, whole tensioning: the related size of repetition measurement ensures in control range, when joint glue reaches design strength, carries out single Ring end tensioning prescinds redundance with grinding wheel after the completion of vertical prestressing is by design requirement construction, and nut or more is exposed after cutting Length is not less than 32mm, while end is using antiseptic and rustproof processing and with C45 concrete sealing off and covering anchorage.
B5, installation clamping plate: clamping plate 13 is installed, due to the lateral surface in the straight wall connector of top plate 2 and bottom plate 1 after the completion of tensioning It is equipped with pre-embedded steel slab 12, and pre-buried to bolt 15 is worn, after JL reinforced bar stretching, using the dedicated glue sticking clamping plate 13 of A grades of steel plates It is fastened on the outside of pre-embedded steel slab, and using pre-embedded bolt band glue.Because the manufacture of upper and lower block has error, between pre-embedded bolt away from It is consistent from being difficult to ensure, therefore long hole is expanded as into the hole on clamping plate, epoxy resin is filled in hole, and cover with large washer, It fastens again, then spot welding nut, closes clamping plate and bolt with epoxy concrete, to enhance the durability of clamping plate and bolt, simultaneously Concrete slurry is injected into shearing resistance steel case 9 and shearing resistance steel case hole to be provided 3 by madjack pipe 16.
As shown in figure 5, the first positioning of section successively is as follows with fixing step in the present embodiment:
(1) unwrapping wire positions: when doing foundation pit transverse direction bracing members, it is necessary to and consideration is located at first segment among adjacent two bracing members, In order to the lifting (reducing longitudinal movement) of M block.Reach intensity to base plate of foundation pit concrete, after rail installation meets the requirements, benefit With total station or GPS precise measurement setting-out, position and the snap the line of first section end W block are released by design drawing on substrate ground, Bottom surface absolute altitude is calculated simultaneously, determines plate thickness.
(2) end segment lifting positions: first datum level of the section as whole hole assembly successively is accurately positioned for subsequent spelling Dress is in place very crucial.It is checked in plate top surface setting datum mark, installation with live reference line when frame sections are prefabricated.First hang The first section bottom plate of dress is in place, as component cannot adjust left and right, envoy using the hydraulic jack for being placed on foundation pit two sides accurately in place Section is to just;And axial position is adjusted by front-end bracket tensioning or pushing tow with jack;By detecting base plate plane height, the bottom of at Face is adjusted with slim jack, centering absolute altitude and levelness.After accurate positioning, gap pad will be adjusted with steel plate gasket in bottom surface It is real, then by the assembled cyclization of preceding method lifting top plate member.
(3) with the positioning of first segment when subsequent segment is installed, to prevent its stress to be subjected to displacement, in load segment starting point front end Hold-down support 18 is arranged in pre-embedded steel slab on 17 top plate of Cast-in-Situ Segment and bottom plate.D32mm essence is installed on lifting lug 19 and support and pricks screw thread First segment is connected and fixed by steel 8 and matched mat plate, nut with Cast-in-Situ Segment.
As shown in fig. 6, the assembly of adjacent segment longitudinal direction mainly comprises the steps that in the present embodiment step c
C1, segment split: on the rail 24 that the handling of Section 2 section is saved to the pre-splicing holding position at rear to head, in the manner aforesaid Assembled cyclization.Before cyclic segment moves forward, insertion is less than aperture 10mm's in the longitudinal prestressing hole to be provided 6 that top surface is reserved Rod iron 20 connects fining twisted steel 8 as guiding rod iron on the lifting lug 19 of 2 top surface of top plate, configures stop nut 22, prevents Only front and back is toppled in the moving process of segment;It is subsequent apart from the uncomfortable suitable rod iron in farther away segment, can in middle clamp plate bolt 15 and Connect hound 29 and flat connecting rod 30 on bottom plate longitudinal prestressing hole to be provided 6, and with the clamp rail support 31 that is mounted on rail 24 Connection forms triangle inclined strut, prevents from toppling over.
In longitudinal prestressing hole to be provided of the bottom plate 1 close to both walls, before wearing two JL32 fining twisted steels 8 and first section Fixing seat is connected, and two YCW60B punchings thousand are installed by 21 spreading fining twisted steel 8 of connector, in segment rear end in subsequent segment Jin top 23, couples with the fining twisted steel being pierced by.Since the segment of second hole, previous hole segment tensioning anchor seal, finish rolling spiral shell Line steel can not continue to connect, and need to save end and connect both sides' lifting lug with previous segment with fining twisted steel and be fixed, then from indulging Fining twisted steel is worn into prestressing force hole to be provided, and reserves installation anchorage 26 in notch in end, continues to install in segment rear end Stretch-draw jack.
The coefficient of friction of segment bottom surface steel plate and rail is 0.15, and frictional force is 125 × 2 × 0.15=37.5 tons, two 50T hydraulic jack is met the requirements.To reduce frictional resistance when promoting, when hanging bottom plate need to by bottom surface polishing steel plate finishing, Seamed edge rounding, and graphite powder is smeared on rail level.To reduce frictional resistance when promoting, bottom surface steel plate need to be beaten when hanging bottom plate It polishes whole, and smears graphite powder on rail level.
It is every ready and check it is errorless after, can carry out longitudinal elapsing operation.It should be controlled and be set by oil pressure gauge when propulsion Standby output power, and each road output oil mass is adjusted, pushing member equilibrium is mobile, slowly draws close to first segment, it is ensured that safety and matter Amount.Top stop nut should be adjusted in moving process in time, the movement of each endpoint in segment is measured at any time, if offsetting In two sides, hydraulic jack or so adjusts alignment axis.
C2, gluing: stop promoting when second section distance head segment 500mm or so, between inspection two component end face of surrounding Distance it is whether consistent, if differed greatly, be adjusted, in segment Mosaic face brushwork epoxy resin adhesive after meeting the requirements, And twice circumferential direction water expandable waterstop is installed in segment groove.It, can also be in construction in order to improve construction efficiency Epoxy resin adhesive is not coated by end face, and is used subsequent to the progress slip casting filling of interannular gap;Sealing rod can also be in handling Installation before assembled, connector are staggered horizontal joint, stay length on one side, another side is stayed short.
C3, interim tensioning: continuing to promote after the completion of gluing, preceding in place to adjust absolute altitude in the slim jack in bottom surface and pad It is real;Limiting square steels are welded in advance on the steel plate of segment bottom surface both side, in the gap after positioning between square steel and rail head side Gasket is wedged, segment transverse shifting is prevented.Whole lifting lugs installation anchorages and φ 32fpk930 fining twisted steel is worn after fixation, and it is preceding The fining twisted steel of one segment is connected with connector, immediately begins to interim tensioning, will have been installed segment and has been closely joined together.It is main It will there are two effects:, will not the mutual changing of the relative positions between segment first is that fixed-segment, guarantees before permanent prestressed stretch-draw;Second is that mentioning For pressure needed for colloid condensation.Palpus two sides are synchronous when tensioning, and whether observation splicing seam is tight afterwards in place for tensioning, repetition measurement center Line and cross dimensions.If dimensional discrepancy is adjusted more than setting value, existing deviation is eliminated or reduced, is carried out after qualification Single-unit is fixed.
C4, hole segment assembling: successively lift the segment 3~N, split cyclization, seam gluing, pushing tow in place, adjustment fixation, Pore-forming segment 28 is organized in interim tensioning.
C5, permanent prestressed stretch-draw: after entire hole segment is installed, the permanent prestressing tendon 25 of tensioning.This engineering five Frame permanent prestressing force in lane carries out tensioning, control stress for prestressing 1395Mpa using 24 beam φ 15-7 steel strand wires, and tensioning finishes After can release interim longitudinal prestressing, and carry out pipe tunnel mud jacking in time, it is wet to carry out duct water filling before mud jacking, single-ended pressure Slurry is until underflow occurs in the other end.
In the present embodiment, the measurement of component posture mainly includes following several respects:
(1) component installation location measures: releasing tunnel middle line or wall inner edge before installation in substrate, and does bid Note.When component installation is in place, with the relative position between the default reference point on total station survey component and base reference line, with Theoretical value compares, and obtains the lateral error of component installation, and be adjusted, correction of deviation.
(2) measurement of component absolute altitude: after the completion of base treatment, absolute altitude datum mark is reserved in many places at the scene.Component is installed just When position, the relative relief between component negative both ends upper surface and absolute altitude datum mark is measured with total station or level, with theory Value compares, and obtains the absolute altitude error of component, and be adjusted accordingly, and component installation is made to meet absolute altitude and slope requirement.
(3) top plate and the centering of bottom plate assembly measure: when top plate and assembled cyclic bottom plate, because of modular level combination facial plane Spend the influence of error, it may occur however that deflection, especially axis direction such as deflection are excessive, will cause the circumferential gap of segment split It is excessive, lead to waterproof failure, therefore top plate is to extremely important just in pre-splicing cyclic process.
Because component is prefabricated using matching method, while there is the mould phenomenon that rises in end face, and the end face plane degree after cyclization is different surely Interannular practical set needs are represented, therefore also need to take other investigating methods.Upper, middle and lower are several between such as measuring two ring end face of front and back Locate spacing it is whether consistent, or distance farther out when measure segment front and back end top plate lower surface between plate upper surface at a distance from be No consistent, when installation, is selected according to component actual conditions.If difference is more than to require, then the corresponding cushioning in horizontal joint, It is adjusted, until meeting the requirements.
In the present embodiment, section assembling it is linear exceed tolerance value when, commented by situ measurements, deformation behaviour Estimate and the judgement of field engineer, using adjusting interim prestressed stretch-draw sequence and be adjusted by the way of being added gasket.It is saving Certain positions between section set the scale copper adjustment of 2~3mm, and the gasket gross area should ensure that segment concrete meets partial pressing and wants It asks.Meanwhile epoxy rubberization thickness is increased in shim perimeter, it is allowed to beyond 1~2mm of spacer thickness.Specific method of adjustment is as follows:
(1) as installed vertical control point error exceeds allowed band when, then takes the method in top plate or base pad copper sheet It is adjusted.
(2) as installed plane control point tolerance exceeds allowed band when, then takes and pad copper sheet in left side wall or right-side wall Method is adjusted.
In the present embodiment, after tunnel structure is installed, injected hole is reserved between segment bottom plate and bed course from bottom plate Gap carry out bottom grouting, grouting quantity should not generate excessive error with theoretical value, it is ensured that not spillage and closely knit, full when grouting It is full.C30 slightly expanded concrete is directly toppled over from injected hole, until injecting paste material flows out from periphery and covers bottom edge.Using certainly Body gravity makes to be full of cement slurry between blinding concrete and prefabricated subsection bottom plate, and cap holes.
In the present embodiment, precast construction uses water-proof concrete, and structure is in a pre-installation, should be poly- in structural outer surface brushing Urethane water-repellent paint;After assembly, outsourcing waterproof roll and protective layer is arranged in pure frame, connects from bottom of foundation water-proof edge Out, package tunnel, which is formed, closes complete waterproof layer.
As shown in figs. 7 to 9, subsiding crack 27 is set as the double-deck waterstop in the present embodiment step d.It is set in structure upstream face Copper sheet waterstop 35 is set, specification is 350 × 3mm, dovetail groove, top plate setting concrete post-cast strip are reserved in bottom plate and side wall, as Waterstop mounting hole;Back sticking type groutable rubber fastening band 36 (350 × 8mm) is set in structure back side, after inner circumferential setting Band preformed groove (20 × 20cm), and pre-embedded steel slab and bolt are poured, rubber fastening band is fixed.
After completing a hole precast segment component installation, before next hole section assembling, two holes segment end block is checked After each portion's size of reserved dovetail groove orifice and position are errorless, copper sheet waterstop is first mounted on fixing end before two segment split Head block bottom plate, side wall reserved notch in, finally in top plate top surface post-cast strip slot nipple, blending bolt is fixed.
2cm thickness rigid plastics foam plate 33 is pasted in the locking nub of male end, and is inserted into φ in the preformed hole of bottom base plate Next hole section end locking nub of assembled cyclization is moved forward, stops top when close by 32 epoxy coating finished product reinforcing bars 34 It pushes away, checks adjustment, after confirming that red copper waterstop and 32 reinforcing bar of φ are directed at reserved hole slot, continue to move to until in place.
The absolute altitude and middle line of Survey Operations end block, after adjustment is fixed, in top post-cast strip by copper sheet sealing belt lacing Split, the lap of splice are not less than 5mm, and two-sided welding forms closure ring body.Bottom plate and side wall are filled along preformed hole in lower portion No. 30 pitches 37 of note close copper sheet waterstop.
It is reserved on concrete post-cast strip 32 in inner circumferential, along side wall to mounting of roof plate back sticking type rubber fastening band since bottom plate, and It is fixed with pre-embedded bolt, finally pastes connector, form close ring.Pre-buried set in the slot of concrete post-cast strip in assembling reinforcement and component Cylinder is connected, and respectively pastes the water expandable waterstop of two 10 × 25mm specifications in both ends of the surface position, it is ensured that new-old concrete it Between be reliably connected, last formwork erection pours wet joint concrete.
Link assembling construction process process and entire under-traverse tunnel assembly section construction technology process in the present embodiment, point Not not as shown in Figure 10 and Figure 11.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in original of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within reason.

Claims (10)

1. a kind of construction method of assembled under-traverse tunnel, which comprises the following steps:
A, in bottom of foundation ditch construction concrete foundation, and setting longitudinally extends along tunnel at position corresponding with tunnel straight wall Rail;
B, after being hoisted to bottom plate on rail in place, after handling top plate to bottom plate top is to just falling in place, by bottom plate and top plate Individual tunnel segment is formed after being attached assembled cyclization;
C, pushing tow after subsequent section assembling cyclization is extremely bonded with previous segment, and the progress of multiple segments is longitudinal permanent pre- Stress forms hole segment after compressing;
D, step b and c are repeated and forms multiple hole segments, subsiding crack is set between adjacent holes segment;
E, it after the completion of tunnel assembly, is in the milk to the gap between segment bottom plate and concrete foundation.
2. the construction method of assembled under-traverse tunnel according to claim 1, which is characterized in that the concrete in step a Foundation construction is followed successively by construction of waterproof layer and reinforced concrete construction, is poured concrete cushion after the installation is completed in rail, pours Top surface is slightly below rail level.
3. the construction method of assembled under-traverse tunnel according to claim 1, which is characterized in that in step b in top plate and Before bottom plate closes up, shear structure and waterproof construction are set in horizontal joint face, vertical prestressing is set after top plate accurate positionin Top plate and bottom plate are subjected to press-in connection, and are attached clamping in the straight wall two sides of top plate and bottom plate setting clamping plate.
4. the construction method of assembled under-traverse tunnel according to claim 3, which is characterized in that the shear structure is anti- Shear-steel case, the shearing resistance steel case are set between top plate straight wall and bottom plate straight wall.
5. the construction method of assembled under-traverse tunnel according to claim 3, which is characterized in that the waterproof construction be The epoxide-resin glue of joint face brushing further includes longitudinal twice water expandable waterstop of installation.
6. the construction method of assembled under-traverse tunnel according to claim 1, which is characterized in that in adjacent segments in step c The end face that is combined longitudinally of section is provided with sealing rod preformed groove and yin-yang tenon tooth.
7. the construction method of assembled under-traverse tunnel according to claim 1, which is characterized in that subsequent section in step c Stop promoting when section is close to previous segment, check whether the distance between two segment end face is consistent, splices after meeting the requirements in segment Face brushwork epoxy resin adhesive, and twice circumferential direction water expandable waterstop is installed.
8. the construction method of assembled under-traverse tunnel according to claim 7, which is characterized in that in subsequent section in step c Section pushing tow passes through longitudinal interim prestressing force together with previous segment and compresses to after fitting with previous segment.
9. the construction method of assembled under-traverse tunnel according to claim 1, which is characterized in that sedimentation seams in step d Set the double-deck waterstop, respectively structure upstream face be arranged copper sheet waterstop, structure back side setting back sticking type can slip casting Formula rubber fastening band.
10. the construction method of assembled under-traverse tunnel according to claim 1, which is characterized in that bottom plate and top plate are being pacified Before dress, in structural outer surface brushing polyurethane water-proof paint.
CN201811377724.2A 2018-11-19 2018-11-19 A kind of construction method of assembled under-traverse tunnel CN109208642A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110497511A (en) * 2019-09-04 2019-11-26 成都城投城建科技有限公司 A kind of mold and method for prefabricating suitable for long lines matching method production assembled under-traverse tunnel frame

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153389A (en) * 2014-08-11 2014-11-19 中铁建大桥工程局集团第六工程有限公司 Construction method for prefabricated assembly type subway station
CN204151825U (en) * 2014-10-16 2015-02-11 张楸长 Super-section prestressing force Urban Underground pipe gallery
CN105002931A (en) * 2015-07-24 2015-10-28 厦门市市政工程设计院有限公司 Bidirectional prefabricated segment splicing construction method for large-sized underpass
CN106988329A (en) * 2017-02-28 2017-07-28 中国十七冶集团有限公司 A kind of ultra-large type piping lane groove construction precipitation system
CN107063381A (en) * 2017-02-28 2017-08-18 中国十七冶集团有限公司 A kind of severe cold area ultra-large type piping lane groove water table measure method
CN107460888A (en) * 2017-09-07 2017-12-12 鞍山三冶建筑工程有限公司 A kind of mounting structure and method of concrete prefabricated piping lane
CN107965324A (en) * 2017-09-29 2018-04-27 中铁二十三局集团有限公司 A kind of assembled under-traverse tunnel
CN207348091U (en) * 2017-09-26 2018-05-11 徐运博 A kind of assembled pipe gallery
CN207392238U (en) * 2017-10-11 2018-05-22 西南交通大学 A kind of assembled under-traverse tunnel
CN207420584U (en) * 2017-09-29 2018-05-29 中铁二十三局集团建筑设计研究院有限公司 A kind of assembled under-traverse tunnel of quick-assembling

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153389A (en) * 2014-08-11 2014-11-19 中铁建大桥工程局集团第六工程有限公司 Construction method for prefabricated assembly type subway station
CN204151825U (en) * 2014-10-16 2015-02-11 张楸长 Super-section prestressing force Urban Underground pipe gallery
CN105002931A (en) * 2015-07-24 2015-10-28 厦门市市政工程设计院有限公司 Bidirectional prefabricated segment splicing construction method for large-sized underpass
CN106988329A (en) * 2017-02-28 2017-07-28 中国十七冶集团有限公司 A kind of ultra-large type piping lane groove construction precipitation system
CN107063381A (en) * 2017-02-28 2017-08-18 中国十七冶集团有限公司 A kind of severe cold area ultra-large type piping lane groove water table measure method
CN107460888A (en) * 2017-09-07 2017-12-12 鞍山三冶建筑工程有限公司 A kind of mounting structure and method of concrete prefabricated piping lane
CN207348091U (en) * 2017-09-26 2018-05-11 徐运博 A kind of assembled pipe gallery
CN107965324A (en) * 2017-09-29 2018-04-27 中铁二十三局集团有限公司 A kind of assembled under-traverse tunnel
CN207420584U (en) * 2017-09-29 2018-05-29 中铁二十三局集团建筑设计研究院有限公司 A kind of assembled under-traverse tunnel of quick-assembling
CN207392238U (en) * 2017-10-11 2018-05-22 西南交通大学 A kind of assembled under-traverse tunnel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
袁翱主编: "《BIM工程概论》", 30 September 2017 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110497511A (en) * 2019-09-04 2019-11-26 成都城投城建科技有限公司 A kind of mold and method for prefabricating suitable for long lines matching method production assembled under-traverse tunnel frame

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