CN104343455B - Long-distance curved jacking pipe and pipe roof construction technique - Google Patents
Long-distance curved jacking pipe and pipe roof construction technique Download PDFInfo
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- CN104343455B CN104343455B CN201310336338.XA CN201310336338A CN104343455B CN 104343455 B CN104343455 B CN 104343455B CN 201310336338 A CN201310336338 A CN 201310336338A CN 104343455 B CN104343455 B CN 104343455B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
Abstract
The invention discloses a long-distance curved jacking pipe and pipe roof construction technique. The construction technique is characterized by comprising the following steps: (1) preparation, that is, the model of construction equipment is selected; (2) measuring and positioning are carried out to determine a construction position; (3) a jacking pipe platform is erected; (4) a tunnel portal is exploded, and a tunnel portal water stop device is mounted; (5) a jacking back is mounted; (6) after mounting and debugging, a pipe jacking machine enters a tunnel for jacking, and exits from the tunnel for receiving after the jacking is completed; step (6) is then repeated until a pipe roof is formed; (7) displaced grouting filling is carried out, so as to complete the pipe roof construction. The long-distance curved jacking pipe and pipe roof construction technique provided by the invention can overcome the defects of the conventional technique, and improve the pipe roof construction quality.
Description
Technical field
The present invention relates to a kind of pipe curtain construction technology, more particularly, to a kind of long distance curved pipe jacking and pipe curtain construction work
Skill.
Background technology
Pipe curtain construction technology is a kind of common form of construction work in constructing tunnel, now with the at full speed of high speed railway construction
Development and engineering design, the progress of construction technology, execution conditions are increasingly restricted.Especially in some long range curve pipes
In curtain work progress, existing process is difficult to complete.
The content of the invention
It is an object of the invention to provide a kind of long distance curved pipe jacking and pipe curtain construction technology, can overcome existing process
Deficiency, improves pipe curtain construction quality level.
For achieving the above object, it is the invention provides a kind of long distance curved pipe jacking and pipe curtain construction technology including as follows
Step：
Step one, preparation chooses construction equipment needed thereby model；
Step 2, measurement and positioning determines construction location；
Step 3, sets up push pipe platform；
Step 4, abolishes portal, and carries out portal antipriming installation；
Step 5, jacking back is installed；
Step 6, the laggard hole jacking of push-bench installation and debugging, after the completion of appear reception；
Then repeat step six, until pipe curtain is formed；
Step 7, replacement grouting filling completes the construction of pipe curtain.
Preferably, the step 6 is specially：First, enter hole and start jacking；Secondly, assembled tube coupling；Again, continue to push up
Enter；Finally, appear reception.
Preferably, drag reduction slip casting and mud conditioning operation are also carried out while step 6 is carried out.
Preferably, 3 stages of the step 6 point, the first stage is the developmental tube stage, and by 2 developmental tubes push pipe is grasped
Machine jacking force, move speed, drag reduction slip casting effect, mud hydraulic pressure, to formation influence；Second stage is the middle plate stage, by
Plate stage pipe curtain is constructed and compared with developmental tube stage various parameters, analyzes and draw under different geological conditions and different buried depth hydraulic pressure
The impact that power is constructed to pipe curtain；Phase III is group's pipe jacking stage, is constructed according to first stage, second stage pipe curtain, is instructed
Phase III pipe curtain is constructed.
Preferably, the push pipe platform be packaged type truss frame platform, including carrying roller, altitude mixture control bolster, supporting support,
Support pulley and support guide are constituted, and the carrying roller is straight, parallel, contour, and the support guide is laid by flat slope, the height
Adjust bolster to be fixed in the supporting support, the supporting support adopts trussing, is installed on the support pulley, institute
State support pulley to be arranged on the support guide.
Preferably, the support guide is the overhead type track of roller.
Preferably, the installation tolerance of the support guide is：Axial location is 3mm, and elevation of top surface is 0～+3mm,
Away from for ± 2mm in two rails.
Preferably, the portal antipriming is that detachable folding pressing plate serves as a contrast double-deck cord rubber water-proof sealing structure,
It is made up of folding paper pressing plate, cord rubber ring, expansion steel loop and connection steel loop.
Preferably, during the drag reduction slip casting, grouting pressure more than underground soil pressure and water pressure, slip casting supervisor with per root
Valve is installed in slip casting arm junction, and the grouting port junction that the slip casting arm is responsible for the slip casting arranges check valve.
Preferably, the replacement grouting filling process is filled using slightly expanded concrete, and first strange rear even, odd number pipe exists
Pre-buried to freeze to be filled after pipeline equipment well, even number pipe is filled after thaw settlement grouting, and the segmentation of pipe inner concrete is poured.
Therefore, the present invention can overcome existing process not using above-mentioned long distance curved pipe jacking and pipe curtain construction technology
Foot, improves pipe curtain construction quality level.
Below by drawings and Examples, technical scheme is described in further detail.
Description of the drawings
Fig. 1 is the structural representation of long distance curved pipe jacking of the present invention and pipe curtain construction technology embodiment；
Fig. 2 is that the vertical structure of push pipe platform in long distance curved pipe jacking of the present invention and pipe curtain construction technology embodiment is illustrated
Figure；
Fig. 3 is that the cross-sectional configuration of push pipe platform in long distance curved pipe jacking of the present invention and pipe curtain construction technology embodiment shows
It is intended to；
Fig. 4 is the construction sectional schematic diagram of long distance curved pipe jacking of the present invention and pipe curtain construction technology embodiment；
Fig. 5 is to pour order in replacement grouting filling in long distance curved pipe jacking of the present invention and pipe curtain construction technology embodiment
Figure.
Specific embodiment
Embodiment
The present embodiment is illustrated by taking the tunnel excavation section pipe curtain construction of connecting line Gong Bei, port Zhuhai and Macao bridge Zhuhai as an example, this reality
Apply the example pipe curtain average length 257.927m/ root, it is most long at home at present, positioned at radius of curvature R=885.852m～
On the easement curve and circular curve of 906.298m, φ 1620mm（Wall thickness 20mm）36, pipe curtain, the pipe curtain group of this big cross section,
It is domestic, also rare in the world.Two, developmental tube curtain, piece, group pipe jacking stage 28 in middle plate stage 6.The distance between pipe curtain
About 35.7cm, pipe curtain is 50cm away from port buildings pile minimum distance, and the subtended angle often saved on easement curve is in jack-in process
It is required for adjustment（Control is within 3mm）, the subtended angle between circular curve segment tube coupling fixes（Control is within 4mm）, Curve Pipe Jacking
Precision controlling is very high to push pipe required precision in the range of ± 30mm.Construction pipe curtain top covers soil thickness about 4～5m, its
The upper port that is is passed in and out wind and rain corridor, and ground settlement requires strict.Pipe curtain penetrating ground geology is predominantly in the mud of stream modeling shape
Matter silty clay, thickness reaches 8.6m, and during bearing capacity is extremely low, powder, gravel layer, thickness reaches 14.3m, and subjacent bed is gravel matter viscosity
Soil, complete, severely-weathered biotite porphyritic granite.The present embodiment pipe curtain parameter is as follows：
Pipe curtain diameter, using the large diameter pipe curtain of A1620mm；
Tube coupling length, using the tube coupling of 4m length；
Pipe curtain wall thickness, thickness of steel pipe is not less than 20mm；
Pipe interlude is away from spacing is according to pipe curtain position different respectively 35.5cm, 35.6cm, 35.7cm, 35.8cm.Main work
Number of passes amount is as shown in table 1.
| Pipe curtain specification | Quantity（Root） | Total length（m） | Remarks |
| Steel pipe A1.62m | 36 | 9180 | Tube coupling 4m/ roots |
Table 1
Fig. 1 is the structural representation of long distance curved pipe jacking of the present invention and pipe curtain construction technology embodiment, as illustrated, bag
Include following steps：
Step one 101, preparation chooses construction equipment needed thereby model.Push-bench is from extra large Rake push-bench, its ELS
Measurement guidance system is equipped with fuzzy logic automatic deviation rectifying function, and fuzzy logic program can analyze the actual row of development machine in driving
The deviation between track and planned course is walked, automatic deviation correction amendment, jacking TRAJECTORY CONTROL is more accurate.Main top system selects 6
The main top oil cylinder combination of 2000kN, maximum thrust 12000kN.To improve the reliability of jacking, in shield machine during test pipe construction
Relay well is set afterwards at 80m.Depending on developmental tube condition of construction, it is determined that whether installing relay well during normal jacking.What relay well started
Principle is, when the main top in development machine rear reaches peak load 60～70%, according to top power is calculated, per hole 1 group of relay well at least to be needed.
Step 2 102, measurement and positioning determines construction location.
Step 3 103, sets up push pipe platform.Jacking pipe joints need first to be placed on push pipe platform before jacking, push pipe platform
Guide function is undertaken, to ensure that tube coupling advances by design altitude and direction.Fig. 2 is that long distance curved pipe jacking of the present invention and pipe curtain are applied
The vertical structure schematic diagram of push pipe platform in work process example, Fig. 3 is long distance curved pipe jacking of the present invention and pipe curtain construction work
The cross-sectional configuration schematic diagram of push pipe platform in skill embodiment.Push pipe platform is packaged type truss frame platform, including carrying roller 1, high
Degree adjusts bolster 2, supporting support 3, support pulley 4 and support guide 5 and constitutes, and 2 carrying rollers 1 are straight, parallel, contour, and support is led
Rail 5 is laid by flat slope, and altitude mixture control bolster 2 is fixed in supporting support 3, and supporting support 3 adopts trussing, is installed on support
On pulley 4, support pulley 4 is arranged on support guide 5.For convenience of description, the He of pipe curtain steel pipe 6 is had also shown in Fig. 2 and Fig. 3
The support guide 5 of plate 7. is the overhead type track of roller in vertical shaft.Before support guide 5 is laid, the position of pipeline center should be first checked,
And running check should check in construction, real-time adjustment.Elevation range of accommodation is when within 1 meter by adjusting altitude mixture control bolster
2 height meet the requirement of push pipe axis centre elevation, and the horizontal fixed position for adjusting altitude mixture control bolster 2 meets push pipe axis water
The requirement that prosposition is put.1 Pin of truss depth direction of supporting support 3/rice, when push pipe elevation range of accommodation is more than 1 meter, is propped up by supporting
Frame 3 plus layer are adjusted.Supporting support 3 can slide along the level of support guide 5, locked by fixing lock during jacking construction.Support guide 5
Installation tolerance be：Axial location is 3mm, and elevation of top surface is away from for ± 2mm in 0～+3mm, two rails.
Step 4 104, abolishes portal, and carries out portal antipriming installation.Push pipe is appeared stage and the normal jacking of push pipe
In the stage, in order to control the top power of push pipe, keep surface subsidence to be less than permissible value, need with certain pressure to steel pipe and surrounding
The annulus pressure injection lubricated slurry of the soil body, if being not provided with setting for hole sealing locking device or hole sealing locking device
Put and do not reach design requirement, the mud of pressure injection will be entered in active well by hole gap, it is impossible to form complete mud sleeve,
Top power is caused to rise, surface subsidence increase is unfavorable to engineering.In addition, the soil property outside hole is poor, particularly lower floor's sandy soils compared with
Thickness, can flow in active well, so as to affect the normal operation of active well, serious meeting to cause on hole during construction along hole gap
Portion's Study on Soil Collapse, or even affect the safety of Adjacent Buildings and underground utilities.
The characteristics of for this engineering, double-deck cord rubber water-proof sealing structure is served as a contrast as hole from detachable folding pressing plate
Door holder water installations, it is mainly made up of folding paper pressing plate, cord rubber ring, expansion steel loop, connection steel loop.Each jacking construction
When, antipriming is installed on the built-in fitting of hole ring beam by bolt, construction is installed on again next place's push pipe and applies after finishing
Station is put, and realizes recycling.
Step 5 105, jacking back is installed.It is allocated to pushing up pick counter-force using I-steel and steel plate pin-connected panel back,
In case diaphram wall back is damaged due to local counter-force more than bearing capacity.Steel back size 3m × 2m × 0.5m, after steel
Cement mortar screeding layer is set between the back of the body and diaphram wall.
Step 6 106, the laggard hole jacking of push-bench installation and debugging, after the completion of appear reception, then repeat step six, until
Pipe curtain is formed.Step 6 is specially：First, enter hole and start jacking；Secondly, assembled tube coupling；Again, jacking is continued；Finally, go out
Hole receives.3 stages of step 6 point, the first stage is the developmental tube stage, and by 2 developmental tubes push-bench jacking force, top are grasped
Enter speed, drag reduction slip casting effect, mud hydraulic pressure, to formation influence；Second stage is the middle plate stage, is applied by middle plate stage pipe curtain
Work and compare with developmental tube stage various parameters, analyze draw under different geological conditions and different buried depth water pressure to pipe curtain construct
Impact；Phase III is group's pipe jacking stage, is constructed according to first stage, second stage pipe curtain, instructs phase III pipe curtain
Construction, Fig. 4 is long distance curved pipe jacking of the present invention and the construction sectional schematic diagram of pipe curtain construction technology embodiment.
Drag reduction slip casting and mud conditioning operation are also carried out while step 6 is carried out.
This engineering curve push pipe, apex distance 255m, relay well used in jack-in process, but the setting of relay well increases equipment
Input, if filling system is well-done, drag-reduction effect substantially, can increase the distance between relay well, reduce relay well quantity,
Reduce equipment investment；In Curve Pipe Jacking, if drag-reduction effect is good, reducing top power can also improve the controllability of tunneling direction.
As simulated mud is appropriate, pressure controlled reasonable, the drag-reduction effect in layer of sand equally can be reached in argillic horizon
Drag-reduction effect, improve slip casting drag-reduction effect factor have grout coordinate ratio, time of repose, plus slurry pressure, ensure in whole jackings
There is serosity to be pressed into any time on pipeline.
In conventional engineering, we have accumulated the experience of some slip casting drag reductions.Affecting the factor of drag-reduction effect mainly has two
Aspect：1. the performance of draft reduction material and if appropriate for engineering geological condition；2. the form of filling system.
Slip casting draft reduction material is from the one-piece type sliding material of Japanese import powdery（BIOS）, in manufacturing process, stirring is abundant
Uniformly, need to do proportioning test before construction, whether proof theory proportioning is suitable, and main control parameters are the viscosity value of serosity
（CPS）.
Lubricated slurry slurry can, according to 4 development machines（13500 types）Work simultaneously, per platform daily by jacking 16m calculating,
Infiltration capacity extraordinarily starches gauge by 1.5, and storage slurry needs 10m3, storing up slurry will ensure 5 hours time of repose, be 3 6m3Storage mud tank, makes in turn
With requirement can be met.
Grouting pressure is greater than underground soil pressure and water pressure, and grouting pressure is slightly larger than underground soil pressure and hydraulic pressure in the present embodiment
Power, at development machine rear, pipe outer wall forms annular mud sleeve, and subsequent pipeline is suspended in slurry and reaches good drag-reduction effect.
BIOS mud belongs to macromolecular compound, it is static after soil layer hole can be sealed with gel, it is little to soil body penetration amount.Grouting pressure is big
In active earth pressure, lubricated slurry meeting balancing earth pressure power reduces annular space and shrinks, and prevents surface subsidence.If grouting pressure is more than
Passive earth pressure, soil layer can be destroyed.Therefore lubricated slurry pressure is set in active earth pressure plus hydraulic pressure with passive earth pressure plus hydraulic pressure
Between.Datum line is calculated by ttom of pipe, and Stress control is in 1.5 times of active earth pressures during construction.
The SYB50-45 type hydraulic grouting pumps that grouting equipment is produced from Shanghai Jiang Hua shipbuilding engineering company, maximum pump amount
3m3/h, has the advantages that equipment is light, it is little, stable and reliable for performance to vibrate.Stir slurry tank and make 2 by oneself, capacity 6m3/.
The slip casting supervisor of grouting pipeline adopts A50 steel pipes, slip casting arm to adopt 1 cun of high-pressure hose.Slip casting be responsible for per root
Valve is installed in slip casting arm junction, and slip casting arm arranges check valve with the grouting port junction on slip casting supervisor.
Every group of injected hole is longitudinally arranged spacing 4m, i.e., lay 1 group per 1 section steel pipe, per group of 3 grouting ports, and ring is in
120 ° of arrangements.
In order to play good drag-reduction effect, development machine appears beginning to entering hole, and overall process continues slip casting, slip casting work by
Automatic pressure-maintaining filling system come realize operation, if full-time staff monitoring.
Mud conditioning is first-selected in the present embodiment presets mud pit in the range of work place, stores full mud, about can hold
The mud more than 2000m of receiving is advisable, and using Pump breath countercirculate, face soil block is mixed into into mud, is starched by shield machine spoil disposal
The incoming mud pit of system, by purified treatment, the materials such as the silt particle in mud with diameter greater than 0.4mm is isolated from mud
Come, be pooled in collecting tank in dry modeling shape dregs, outward transport is thrown aside；And the mud after purified treatment is then entered in circulatory pool, if its
Indices meet the requirements, then as needed pump into the mud in circulatory pool using slush pump and reach in shield machine recycling
Purpose, and be continuously replenished clear water according to demand；If its indices of the mud after purified treatment are undesirable, using mud
Stock pump is pumped into useless slurry pond, concentrates outward transport to throw aside.
Step 7 107, replacement grouting filling completes the construction of pipe curtain.Replacement grouting filling process adopts slightly expanded concrete
Be filled, it is first strange after it is even, odd number pipe it is pre-buried freeze pipeline equipment well after filled, even number pipe is carried out after thaw settlement grouting
Filling, pipe inner concrete segmentation is poured, and order is as shown in Figure 5.
Therefore, the present invention overcomes the deficiency of existing process using above-mentioned long distance curved pipe jacking and pipe curtain construction technology,
Pipe curtain construction quality level is improved, to later stage long distance curved pipe jacking construction technology important reference is provided, it is domestic after being
Outer long distance curved pipe jacking group pipe jacking provides Cheng work cases, at the same by group's pipe jack-in process to Adjacent Buildings,
Underground pipelines etc. are monitored, and sum up group pipe jacking to influence degrees such as Adjacent Buildings, underground utilities；By to different complicated geologicals
Soil improvement, sum up the specific parameter such as the selection of soil improvement grouting serous fluid, pressure size, dilation angle, class after being
Foundation is provided like engineering；Efficiency of construction can be improved with save resources, reduction of erection time by Optimizing construction technique, project setting.
Finally it should be noted that：Above example only to illustrate technical scheme rather than be limited,
Although being described in detail to the present invention with reference to preferred embodiment, it will be understood by those within the art that：Its according to
So technical scheme can be modified or equivalent, and these modifications or equivalent also can not make to repair
Technical scheme after changing departs from the spirit and scope of technical solution of the present invention.
Claims (9)
1. a kind of long distance curved pipe jacking and pipe curtain construction technology, it is characterised in that comprise the steps：
Step one, preparation chooses construction equipment needed thereby model；
Step 2, measurement and positioning determines construction location；
Step 3, sets up push pipe platform；
Step 4, abolishes portal, and carries out portal antipriming installation；
Step 5, jacking back is installed；
Step 6, the laggard hole jacking of push-bench installation and debugging, after the completion of appear reception；
Then repeat step six, until pipe curtain is formed；
Step 7, replacement grouting filling completes the construction of pipe curtain；
3 stages of the step 6 point, the first stage is the developmental tube stage, and by 2 developmental tubes push-bench jacking force, top are grasped
Enter speed, drag reduction slip casting effect, mud hydraulic pressure, to formation influence；Second stage is the middle plate stage, is applied by middle plate stage pipe curtain
Work and compare with developmental tube stage various parameters, analyze draw under different geological conditions and different buried depth water pressure to pipe curtain construct
Impact；Phase III is group's pipe jacking stage, is constructed according to first stage, second stage pipe curtain, instructs phase III pipe curtain
Construction.
2. long distance curved pipe jacking according to claim 1 and pipe curtain construction technology, it is characterised in that the step 6 tool
Body is：First, enter hole and start jacking；Secondly, assembled tube coupling；Again, jacking is continued；Finally, appear reception.
3. long distance curved pipe jacking according to claim 2 and pipe curtain construction technology, it is characterised in that carrying out step 6
While also carry out drag reduction slip casting and mud conditioning operation.
4. long distance curved pipe jacking according to claim 1 and pipe curtain construction technology, it is characterised in that：The push pipe platform
Constitute for packaged type truss frame platform, including carrying roller, altitude mixture control bolster, supporting support, support pulley and support guide, it is described
Carrying roller is straight, parallel, contour, and the support guide is laid by flat slope, and the altitude mixture control bolster is fixed on the supporting support
On, the supporting support adopts trussing, is installed on the support pulley, and the support pulley is arranged at the support and leads
On rail.
5. long distance curved pipe jacking according to claim 4 and pipe curtain construction technology, it is characterised in that：The support guide
For the overhead type track of roller.
6. long distance curved pipe jacking according to claim 5 and pipe curtain construction technology, it is characterised in that the support guide
Installation tolerance be：Axial location is 3mm, and elevation of top surface is away from for ± 2mm in 0～+3mm, two rails.
7. long distance curved pipe jacking according to claim 6 and pipe curtain construction technology, it is characterised in that：The portal sealing
Device is that detachable folding pressing plate serves as a contrast double-deck cord rubber water-proof sealing structure, by folding paper pressing plate, cord rubber ring, is expanded
Steel loop and connection steel loop composition.
8. long distance curved pipe jacking according to claim 7 and pipe curtain construction technology, it is characterised in that：The drag reduction slip casting
During, grouting pressure is more than underground soil pressure and water pressure, and slip casting supervisor installs valve with every slip casting arm junction, described
The grouting port junction that slip casting arm is responsible for the slip casting arranges check valve.
9. long distance curved pipe jacking according to claim 8 and pipe curtain construction technology, it is characterised in that：The replacement grouting
Filling process is filled using slightly expanded concrete, it is first strange after it is even, odd number pipe it is pre-buried freeze pipeline equipment well after filled out
Fill, even number pipe is filled after thaw settlement grouting, the segmentation of pipe inner concrete is poured.
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| CN201310336338.XA CN104343455B (en) | 2013-08-05 | 2013-08-05 | Long-distance curved jacking pipe and pipe roof construction technique |
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| CN201310336338.XA CN104343455B (en) | 2013-08-05 | 2013-08-05 | Long-distance curved jacking pipe and pipe roof construction technique |
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| 长距离穿越长江大堤顶管施工技术;张波等;《人民长江》;20110831;第42卷(第16期);第61-64页 * |
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