CN107795749A - A kind of precast spliced pipe fitting jacking system and its construction method - Google Patents
A kind of precast spliced pipe fitting jacking system and its construction method Download PDFInfo
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- CN107795749A CN107795749A CN201711330797.1A CN201711330797A CN107795749A CN 107795749 A CN107795749 A CN 107795749A CN 201711330797 A CN201711330797 A CN 201711330797A CN 107795749 A CN107795749 A CN 107795749A
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- pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
Abstract
A kind of precast spliced pipe fitting jacking system and its construction method, jacking system include Zhu Ding mechanisms and the splicing pipeline set along in the design path of design pipeline, and splicing internal diameter of the pipeline is more than the external diameter of design pipeline, and splicing pipeline is spliced by splicing pipe fitting；Splicing pipe fitting is stripe board, and its former and later two side corresponds to the axial overlap edge of outstanding formation respectively, two sides in left and right correspond to the outstanding circumferentially overlapping side of formation respectively；Axle of the coaxial splicing pipe fitting along splicing pipeline splices successively upwardly through axial overlap edge, splicing successively upwardly through circumferentially overlapping side along the ring for splicing pipeline with all splicing pipe fittings, is fastened by connector.The construction method of the present invention provides strong support with jack-in process to excavate, by the way of artificial cooperation jacking construction of cutting the earth, can meet execution conditions requirement common in jacking construction by the interim splicing pipeline of the assembly in the design path of design pipeline.It can be widely applied to jacking construction.
Description
Technical field
The present invention relates to underground engineering field, particularly a kind of jacking construction system and construction method.
Background technology
With the rapid development of science and technology, technical innovation plays important role in all trades and professions.For
For building enterprise, undoubtedly a kind of opportunities and challenges.Wherein, jacking construction is as relatively common non-excavating construction method,
It is a kind of piping laying construction technology do not excavated or excavated less, when open-cut is more difficult and cutting depth is more than under 5 meters
When waterline is higher, suitable for non-excavating construction, i.e. pipe jacking construction technique, it is mainly used in and excavates the larger pipeline work of difficulty
Journey, such as sewer line engineering, water supply and sewerage pipeline, natural gas petroleum pipeline, communication cable, it being capable of river crossing, tunnel, public affairs
Any building such as road, railway, high mountain.Using pipe jacking construction technique, first, manpower can be saved by not excavating or excavating less, reduce
The expense of earth clearance；Second, not excavating or excavating less the disturbance reduced to greatest extent to soil, atmosphere pollution can be reduced,
Protect periphery natural ecological environment.
At present, the jacking of jacking construction generally use one side or both sides jacking, the control of generally use computer, laser guide control
Preparation method control pipeline elevation and position of center line.For jacking construction as a kind of non-excavating construction method, it is by jacking device
Caused top power, overcome the frictional force of pipeline and surrounding soil, the gradient of pipe design is headed into soil, popular says, is exactly
After one section pipe jacking, next section pipe continues jacking.Its principle is pushed away by means of main top oil cylinder and pipeline enclosure, relay well etc.
Power, tool pipe or development machine are advanced in received well always out of active well through soil layer and sling.Pipeline follow closely tool pipe or
After development machine, it is embedded between two wells.Wherein, four kinds of pipe jacking construction techniques are relatively conventional, i.e., cutting edge propulsion working method, mud water type push away
Enter engineering method, soil pressure formula propulsion working method, the dense formula propulsion working method of mud.Cutting edge propulsion working method is opening medium-large caliber pipe propulsion working method,
Other three kinds are hermetic type medium-large caliber pipe propulsion working method, and mud water type propulsion working method is by cutterhead and top speed balance front soil
Pressure, regulation circulating water pressure are handled to balance groundwater pressure without ground improvement or precipitation, after construction ground settlement compared with
It is small；Soil pressure formula propulsion working method into cutting storehouse by injecting a certain proportion of mixing material so that the soil mixing full of hopper dredger
Body balances earth balance pressure and groundwater pressure, and without the rear portion such as slush pump corollary apparatus, complete machine is cheap, and without mud
Processing, construction cost are low；The dense formula propulsion working method of mud uses secondary grouting method, greatly reduces mill resistance, is adapted to push up over long distances
Enter.
Although above-mentioned traditional pipe jacking construction method automaticity is high, constructed in the case of single geological conditions straight line jacking
Speed is fast, pipeline elevation and position of center line precision are high.But this method needs pipe ends to have active well or a received well, and
Pipeline elevation and position of center line precision control when running into barrier during complex geological condition or sweep jacking and jacking
Deviation processed is larger, or even can not continue jacking；Especially pipe with small pipe diameter deviation be it is very big, it is necessary to it is continuous adjustment jacking side
To and elevation, fine setting number it is frequent, speed of application is slower；And in the initial propulsion stage, direction is mainly main top oil cylinder control, because
This, on the one hand will slow down main top fltting speed, on the other hand constantly adjust oil cylinder marshalling and the correction of push pipe head.Sometimes it is mechanical
In jack-in process push pipe head damage can not work, and push pipe push pipe head be embedded in soil can not take out push pipe head, it is necessary to
Push pipe Handpiece Location takes out push pipe head after excavating shaft again.The A patent disclosures of CN 103090107 rectangle big cross section steel knot
The assembled support tube coupling jacking mechanism of structure, advantage are that support tube coupling instead of the prefabricated tube coupling of traditional push pipe, reduce push pipe deadweight,
The drawbacks of can effectively avoiding that push pipe driving can not be utilized, but buried depth is restricted, and only applies constructed in shallow embedding at this stage
In.
The content of the invention
It is an object of the invention to provide a kind of precast spliced pipe fitting jacking system and its construction method, to solve complex conditions
The technical problem that lower jacking construction efficiency is low, precision is low.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of precast spliced pipe fitting jacking system, including Zhu Ding mechanisms, in addition to set along in the design path of design pipeline
Splice pipeline, the splicing internal diameter of the pipeline is more than the external diameter of design pipeline, and splicing pipeline is spliced by splicing pipe fitting；Institute
It is stripe board to state splicing pipe fitting, and its former and later two side corresponds to two the axial overlap edge of outstanding formation, left and right sides respectively
The outstanding circumferentially overlapping side of formation is corresponded to respectively；Axle of the coaxial splicing pipe fitting along splicing pipeline is upwardly through axial overlap joint
Side is spliced and fastened by connector successively, and the ring along splicing pipeline for splicing pipe fitting with week is upwardly through circumferentially overlapping
Splice successively and fastened by connector in side.
The Zhu Ding mechanisms are arranged on work bottom, including the postnotum being connected in active well side wall and vertical apical grafting
Main top jack on postnotum, the front end of the Zhu Ding mechanisms are also associated with push pipe head.
The cross section of the splicing pipeline is the either more curve abnormity of circular, polygon.
The material of the splicing pipe fitting is fiberglass or metal alloy.
The size for splicing the external diameter that internal diameter of the pipeline is more than design pipeline described in jacking construction is 10~20cm.
A kind of construction method of precast spliced pipe fitting jacking system described in application, is comprised the following steps that
Step 1, construction working well and received well.
Step 2, excavated forward along design path in the design attitude of design pipeline.
Step 3, with the assembled splicing pipeline of excavation construction.
Step 4, repeat step two and step 3 are to splicing pipeline along design path assembly to received well.
Step 5, connection installation Zhu Ding mechanisms and push pipe head in the bottom of active well.
Step 6, adjust the jacking of Zhu Ding mechanisms and highly and behind jacking direction start jacking.
Step 7, design pipeline stop jacking along design path jacking received well.
Step 8, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms and push pipe head.
Step 9, to the surrounding cement injection of design pipeline, complete whole construction.
In the step 2, unidirectionally excavated from active well to received well or from active well and received well simultaneously to middle double
To excavation；In the step 7, with design pipeline jacking, the splicing pipeline before push pipe head is removed.
A kind of precast spliced pipe fitting jacking system described in application without received well construction method, for by place or its from
Right condition limitation, the situation that can not set received well, are comprised the following steps that：
Step 1, construction working well.
Step 2, excavated forward along design path in the design attitude of design pipeline.
Step 3, with the assembled splicing pipeline of excavation construction.
Step 4, repeat step two and step 3 extremely splice pipeline to design path terminal.
Step 5, in the bottom of active well connection installation Zhu Ding mechanisms.
Step 6, adjust the jacking of Zhu Ding mechanisms and highly and behind jacking direction start jacking.
Step 7, design pipeline to terminal, stop jacking along design path jacking.
Step 8, remove and take out Zhu Ding mechanisms.
Step 9, to the surrounding cement injection of design pipeline, complete whole construction.
Construction method when having a barrier of precast spliced pipe fitting jacking system described in a kind of application, in design pipeline
When to have barrier or design path in design path be curve, comprise the following steps that：
Step 1, construction working well and received well.
Step 2, excavated forward along design path in the design attitude of design pipeline.
Step 3, with the assembled splicing pipeline of excavation construction.
Step 4, repeat step two and step 3 are to splicing pipeline along design path assembly to received well.
Step 5, connection installation Zhu Ding mechanisms and push pipe head in the bottom of active well.
Step 6, adjust the jacking of Zhu Ding mechanisms and highly and behind jacking direction start jacking.
Step 7, with design pipeline jacking, remove the splicing pipeline before push pipe head.
Step 8, design pipeline stop jacking along design path jacking received well.
Step 9, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms and push pipe head.
Step 10, to the surrounding cement injection of design pipeline, complete whole construction.
Construction method during a kind of push pipe head damage of the precast spliced pipe fitting jacking system described in application, for setting
Count in pipeline jack-in process, the situation of push pipe head damage, comprise the following steps that：
Step 1, excavated from received well along design path to push pipe heading.
Step 2, with the assembled splicing pipeline of excavation construction.
Step 3, repeat step one and step 2 are to splicing pipeline along design path assembly to push pipe Handpiece Location.
Step 4, push pipe head is removed, and received well taking-up is transported to by splicing pipeline.
Step 5, new push pipe head is transported by splicing pipeline, starts jacking after replacing.
Step 6, with design pipeline jacking, remove the splicing pipeline before push pipe head.
Step 7, design pipeline stop jacking along design path jacking received well.
Step 8, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms and push pipe head.
Step 9, to the surrounding cement injection of design pipeline, complete whole construction.
Compared with prior art the invention has the characteristics that and beneficial effect：
The present invention devises a set of jacking system for jacking construction, the assembled interim splicing in the design path of design pipeline
Pipeline, strong support is provided with jack-in process to excavate, by the way of artificial cooperation jacking construction of cutting the earth, can meet to push up
Common execution conditions requirement in pipe construction：
The first, under normal condition, while is provided with active well and received well, when natural conditions are preferable, can use two-way excavation,
Efficiency of construction is improved, splicing tube material is fiberglass, and its processing performance is excellent, has the characteristics of simple technique, one-shot forming,
And glass-reinforced plastic material high-strength light, good corrosion resistance, prefabrication is high in machining efficiency, while as design pipeline jacking can be torn open
Except splicing pipeline, assembled pipe fitting can continue cycling through utilization, and cost is relatively low.
Second, solves the construction problem in the case of without received well, this method can be not provided with received well, now uneasy
Push pipe head is filled, due to splicing the special construction and material of pipeline, advance resistance, speed of application can be reduced when the inorganic crown is entered
It hurry up, securely and reliably, suitable wide popularization and application.
The third, splicing pipeline be whole jack-in process provides be oriented to and support effect, guarantee complex geologic conditions or
Jacking construction pipeline elevation and position of center line have higher precision in the case of curved jacking, solve and are running into barrier
The problem of Shi Dingjin difficulties, the advantages of speed of application is fast, cost is low.
4th kind, when can solve to design middle push pipe head damage in pipeline jack-in process, do not increasing the situation of vertical shaft
Under, the problem of push pipe head is taken out, excavate simultaneously assembled interim splicing pipeline in addition by received well, damage push-bench
Head can be transported to received well along splicing pipeline and take out, and do not influence normal work, the soil body will not be damaged, securely and reliably
Efficiency high.
It the composite can be widely applied to jacking construction.
Brief description of the drawings
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the constructing structure schematic diagram of the embodiment of the present invention one.
Fig. 2 is the constructing structure schematic diagram of the embodiment of the present invention two.
Fig. 3 is the constructing structure schematic diagram of the embodiment of the present invention three.
Fig. 4 is the splicing structure schematic diagram of present invention splicing section of jurisdiction.
Fig. 5 is the single chip architecture schematic diagram of present invention splicing section of jurisdiction.
Reference：1- active wells, 2- received wells, 3- Zhu Ding mechanisms, 4- splicings pipe fitting, 5- push pipes head, 6- design pipes
Road, 7- connectors, 8- barriers.
Embodiment
Embodiment is shown in Figure 1, this precast spliced pipe fitting jacking system, including Zhu Ding mechanisms 3, in addition to edge design
The splicing pipeline set in the design path of pipeline 6, the splicing internal diameter of the pipeline are more than the external diameter of design pipeline 6, splice pipeline
It is spliced by splicing pipe fitting 4.
Referring to described in Fig. 5, the splicing pipe fitting 4 is stripe board, and its former and later two side corresponds to outstanding formation respectively
Two axial overlap edge, left and right sides correspond to the outstanding circumferentially overlapping side of formation respectively；Splicing shown in Figure 4, coaxial
Axle of the pipe fitting 4 along splicing pipeline splices and fastened by connector 7 successively upwardly through axial overlap edge, with the splicing in week
The ring along splicing pipeline of pipe fitting 4 splices and fastened by connector successively upwardly through circumferentially overlapping side.
Referring to shown in Fig. 2, Fig. 3, the Zhu Ding mechanisms 3 are arranged on the bottom of active well 1, including are connected in active well side wall
Postnotum and vertical top be connected on main top jack on postnotum；The front end of the Zhu Ding mechanisms 3 is also associated with push pipe head.
The cross section of the splicing pipeline is special-shaped for the either more curves of circular, polygon, the material of the splicing pipe fitting 4
For fiberglass or steel, aluminium alloy, hardness can meet surrounding soil pressure, and splicing internal diameter of the pipeline is more than described in jacking construction
The size for designing the external diameter of pipeline 6 is 10~20cm.
A kind of construction method of precast spliced pipe fitting jacking system described in application, is comprised the following steps that：
Step 1, construction working well 1 and received well 2.
During construction working well, well head earth excavation is by the way of mechanical equivalent of light excavation, crane lifting；Digging process is according to a Pin
The cycle installation of grid steel frame one, the cyclic spray concrete of two Pin grid steel frames one are carried out；Should be along vertical shaft long axis direction point in excavation
Duan Jinhang, a soil bucket lay down area is first excavated out at one end, the earthwork at excavation is temporarily placed at the other end；Lifting soil bucket is adopted
With diameter 1m, high 1.2m steel cylinder；Crane lifting is commanded by special messenger, while personnel answer extraction shaft in hoisting process
Bottom.Fore shaft collar tie beam construction is carried out after to be done, survey crew first is carried out to the plan-position walling crib excavating sideline of fore shaft collar tie beam
Positioning, because fore shaft collar tie beam construction stratum is not directed to underground water, so collar tie beam construction is can be carried out in non-Dewatering well,
Walling crib earth excavation mainly by the way of the construction of hand excavation's cooperative mechanical, treats that machinery is excavated to apart from fore shaft circle projected depth
Manual cleaning surplus earth, smooth compacting are used during 0.5m, and clears up leveling side wall, avoids invading structure, treats manual cleaning base
After the completion of face, reinforcing bar is processed and colligation, the hook length of stirrup and reinforcement is 10d, and the connection between cage bar uses
The mode of colligation is overlapped, the lap of splice is not less than 35d.In corresponding absolute altitude colligation fore shaft ring beam reinforcing steel bar, in order to ensure that reinforcing bar is taken
The requirement connect, after the completion of fore shaft ring beam reinforcing steel bar colligation, vertically inserted in soil and be no less than through fore shaft collar tie beam using spiral
10d, arranged using blossom type, during in order to shaft excavation, the needs of Pin framves construction.Fore shaft circle is propped up after reinforcing bar colligation
Mould, fore shaft circle template use glued board, bolt connection, and back up selects the 10 × 10cm lumps of wood and shelf pipe from back up.It is vertical
Concrete pad, then formwork erection are first added during mould, carrying out concrete to fore shaft collar tie beam to ensure thickness of protection tier, after formwork erection pours
Build, before pouring, check whether template contral line position is accurate, horizontal, cross dimensions and headroom size meet design and wanted
Ask；Construction in layer is wanted during placing concrete, setting chute in construction stretches into template；Per one layer of placing, made firm by ramming with poker vibrator it is closely knit,
Principle according to " fast insert is pulled out slowly " is vibrated；When concrete is poured into a mould, arrange to stand by Quality Inspector, builder and security official.Treat concrete
Intensity reaches form removal after requirement, and watering maintenance immediately, pays attention to being incubated during winter construction after form removal, while in construction of working shaft
It is preceding also to take effective Groundwater Control measure, to prevent from locally lying in the possibility of upper strata sealing.Fore shaft collar tie beam has been constructed
Finish after concrete strength reaches requirement, that is, start the earthwork in excavation pit, the one side in collar tie beam bottom first digs 1.0m depths, installation
Steel grating, vertical reinforcement make an entirety with Guan Liang.Then along crater wall in framework of steel reinforcement medial and lateral welding hanging double steel bar
Mesh sheet.Mesh sheet joint is all not less than a grid using colligation, length.Steel grating sets spacing, generally, is set per 0.5m
One of steel grating.Punched in vertical shaft and locate the Pin grid solid matters of upper and lower three.Borehole wall integral sinking is prevented, is excavated using diagonal, other
Triangle is supported, and this angle is cut the earth, after installation steel grating, gunite concrete, then digs corresponding one jiao.Jetting cement thickness is
300mm, grade C25；Accelerator volume is the 3%~5% of cement weight；Compound is stirred using mixer, with mixing with not mixing
Its resting period of the siccative of accelerator is not to be exceeded 1 hour.Spray shield operation should be layered, be segmented, Divisional is carried out, and injection order should
Bottom-up, spiral mobile in the horizontal direction, tactical diameter should be 300mm or so, and the circle of a circle pressure one, each jetting height is not
It should not be accumulated more than 0.5m, during injection at one, it is desirable to spray closely knit, muscle must not be leaked, it is desirable to which the concrete surface after injection is put down
It is whole, straight suitable.Whether checking tool, equipment are complete good before injection, and pipeline must not have dog leg during injection, and spray gun is under any circumstance
Forbid to people.Injection worker must accomplish start when first blow, start shooting again, being fed again, at the end of after material sprayed after close wind again.To
Jet pump is fed continuous uniform, and when machine runs well, enough material stocks are maintained in hopper.The operating pressure of spraying machine meets
Pressure at shower nozzle is in 0.1Mpa.Shower nozzle is vertical with by spray plane holding, preferably keeps 0.6~1.0m distance, controls during injection
The ratio of mud.Batch position that connects of previous jetting cement is cleared up before injection every time, the soil on surface is removed, to ensure the close of joint part
It is real.Working pit should successively construct downwards successively when constructing, and soil excavation, install external net slice, interior dowel, install steel grating, be interior
Dowel, interior mesh sheet, anchor spraying concrete.To ensure the stabilization of vertical shaft, in working shaft, corner is vertically every twice steel grating
One of angle brace is placed, to improve the resistance to capsizing of vertical shaft and stability, is supported with digging with setting until vertical shaft bottom surface.For convenience of people
Member's vertical shaft up and down, sets in every vertical shaft and is required for the upper and lower safety climbing ladder of personnel, access ladder construction according to atlas, height and
For specification according to atlas drawing requirement installation, cat ladder width is 90cm, and cat ladder vertically every 3m designer's half spaces, is climbed
Handrail is installed in terraced both sides, and handrail installation must firmly facilitate.Cat ladder material selection steel plate and angle steel are built, need during construction shaft by
Cat ladder built-in fitting is pre-buried in place.Shaft bottom uses 300 thick C25 concrete ejections+steel gratings, the 500 thick cast-in-place steel of C40 water-tight concretes
Tendon concrete structure, shaft bottom arrangement shaft bottom grid, after shotcrete is constructed, reaches designed elevation, 1.3 × 1.3m is in working pit
Catch pit, catch pit use reinforced concrete structure, collect current in working pit.Double-layer threaded reinforced mesh is laid, pours into a mould C40
Concrete 500mm is thick, ensures the hole smooth drying in bottom.Working shaft is set to form an entirety.At the same time, apply being operated well
Man-hour is it is noted that safety problem.
After the completion of construction of working shaft, Zhu Ding mechanisms are arranged in well, mainly postnotum, guide rail, main top oil cylinder, oil pump moves
Power station, steel staircase etc..Push pipe pedestal is steel construction prefabricated components, and push pipe base position is accurately put by pipe design axis
Sample, according to the baseline of surveying and locating during installation, hang in underground and fixation is installed in place.Guide rail on pedestal designs axis according to push pipe
And be placed centrally by actual measurement portal center, and bracing reinforcement is set, it is indeformable to ensure that pedestal is stablized.Shaft excavation is to structural outer rim
After substrate, back cover should be carried out in time.Vertical shaft shaft bottom is using the structure of " back cover grid+transverse and longitudinal dowel+casting concrete ", work
Vertical shaft back cover bar-mat reinforcement is arranged using the double-deck 150mm crosses of φ 22, pours C30 concrete.Casting concrete and installation vertical shaft bottom
Elevation must be checked before slab grid, welding, the casting concrete of steel grating could be carried out after accurate, silo bottom is applied
Make heatable adobe sleeping platform and catch pit, treat to abolish interim back cover after the completion of jacking.To ensure, entering the stabilization of openings position supporting construction
Property, going out, entering the side step of hole two to set the 100mm of 3 Ф of stiffener 22, stretching out hole length up and down and be not less than 1m.On vertical shaft hole
Under the support of each increase by one of HW300 × 300 × 10 × 145mm disks, connection upper lower burrs support to form gate frame, to ensure that vertical shaft punches
Place is stable, and ensures that disk support is reliably welded with just lining grid.One layer of 20cm basis is spread with C20 concrete in bottom land, width is relatively rested the head on
The long 50cm of wood, 20cm × 20cm sleepers, buried depth 13cm are buried in inside concrete.Sleeper length should be each longer than guide rail outer rim both sides
Go out 30cm, spacing 40cm.The face of sleeper Transducers Embedded in Concrete needs bag malthoid.Guide rail selects No. 24 rail, two guide rail parallels, contour,
The gradient and center line meet the requirements.Elevation is consistent with design conduit slope, is weldingly fixed on steel plate.（This part-structure is existing
Have）
Step 2, excavated forward along design path in the design attitude of design pipeline 6：In design pipeline after the completion of active well
Design attitude determines a ttom of pipe elevation and position of center line using manually being excavated along duct orientation, per 50cm is excavated forward, opens
Mouth size determines according to splicing outer diameter tube.
Step 3, with the assembled splicing pipeline of excavation construction：Splice internal diameter of the pipeline slightly larger than design outer diameter tube, splicing tubes
Part uses glass steel material or other rigid materials, and splicing pipe fitting block number can determine according to field condition, this example exemplified by three pieces,
Fixation is bolted before contiguous concatenation pipe fitting.
Step 4, repeat step two and step 3 are to splicing pipeline along design path assembly to received well：Assembly completes one
The section splicing follow-up continuous excavation of pipeline, assembled splicing pipeline forward is then proceeded to, equally spiral shell is used before two adjacent sections splicing pipeline
Bolt is connected, until pipe design terminal.
Step 5, connection installation Zhu Ding mechanisms 3 and push pipe head 5 in the bottom of active well 1.
Splice pipe fitting after the completion of in active well pipe laying jacking device, back is installed first, the size of back passes through
Calculating and setting, vertical iron is set before the lumps of wood, piles up horizontal iron before vertical iron, horizontal iron requirement is piled up smooth, and top pick back seat is combined sternly with horizontal iron
It is close, top power equably can be passed into back；Jacking hole back will have enough intensity and firmness, can be born in jack-in process
The maximum force of jack；Parados surface will smooth out afterwards, and perpendicular to the axis of jacking pipeline, avoid producing it is eccentric by
Pressure.Tool back plane will install main top equipment again perpendicular to pipe centerline afterwards after installing, and main top jack is symmetrically arranged as into 2,
It is fixed on combination jack stand and makees integral hoisting.Every jack specification is consistent, travel synchronization, and oil circuit is in parallel, collective effect,
Independent control valve is had, the range of stretching is less than oil cylinder stroke 10cm or so.Oil pump device is located at apart from main top thousand
Jin top nearby, and sets rain-proof shelter, and oil circuit installation is straight, reduces corner, joint is oil-proof, and the maximum working pressure (MWP) of oil pump is not
More than 32kpa, equipped with the index protection device such as pressure limiting valve, overflow valve and pressure gauge, test run must be carried out after installing, is being pushed up
Enter middle timing repair and maintenance, fix a breakdown in time.The size and structure of push pipe head will meet the requirements, will before jacking hole is hung in
Make detailed inspection.When crane unloads head, steady, slow, avoid impacting, collide, and commanded by special messenger, it is ensured that safety can
Lean on.After head is placed on guide rail, determine the deviation of directivity and relative relief at the center of front and back end, and make a record, head with
The contact surface of guide rail must be steady, identical.Tool pipe and development machine will be accurately positioned, both sides are symmetrical by design requirement.Head must
The equipment such as circuit, oil circuit, water route, mud channel and steerable system must be connected one by one, each part is connected firmly, and must not ooze
Leakage, installation is correct, and conscientiously inspection and trial operation are carried out to each subsystem.When disposing earthwork transportation equipment, put down using muddy water
Weighed push-bench, and mud is passed through into the dredge pump that is connected with pipeline output and directly defeated with spoil disposal by-pass collar in a manner of hydraulic
It is sent to surface mud sedimentation basin.During push pipe, either pipe enters hole from working pit, still appears, between pipe and hole all
Gap must be left, but gap must carry out closing, such as bad sealing, and underground water, thixotropic slurry and silt particle will be from the gaps
In flow in hole, influence to cheat interior operation, the slump at hole can be caused when serious, is caused the accident, therefore hole must do sealing, sealing
Method is to pour 300mm thickness concrete seepproof screens entering openings position, watertight rubber circle is installed on the outside of wall.δ is used among rubber ring
=10mm steel plates are used as barrier and fixed rubber ring.In order to prevent push pipe head disengaging working pit hole from flowing into muddy water, and ensure
The thixotropic slurry of pressure injection will not be lost in jack-in process, it is necessary to install front wall sealing collar in advance, its part is pre-buried
Flange chassis, rubber slab, keeper plate of steel, packing ring and bolt.Flange chassis is preliminarily embedded in concrete vertical shaft, and center is correct, and end face is put down
It is whole, firmly install, the silk mouth safekeeping of bolt, cement mortar is preliminarily removed.First fill rubber slab during installation, rear steel loading pressing plate, then
Upper gasket is simultaneously fastened with nut, it is prevented current.Step 6, the jacking of Zhu Ding mechanisms 3 is adjusted highly and behind jacking direction
Start jacking：Top power size is controlled during jacking, top power crosses conference and destroys pipeline.
Step 7, design pipeline 6 stop jacking along design path jacking received well.
Step 8, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms 3 and push pipe head 5.
Step 9, to the surrounding cement injection of design pipeline 6, complete whole construction：The caliber of splicing pipeline is that basis is set
The choice of diameter of pipeline is counted, grouting amount will not also be impacted even if assembled pipeline is not removed.
In the step 2, unidirectionally excavated from active well to received well or from active well and received well simultaneously to middle double
To excavation；In the step 7, with design pipeline jacking, the splicing pipeline before push pipe head is removed.
It is shown in Figure 1, a kind of precast spliced pipe fitting jacking system described in application without received well construction method, it is and upper
State unlike construction method, be the situation for limit, can not being set received well by place or its natural conditions in this example, have
Body step is as follows：
Step 1, construction working well 1.
Step 2, excavated forward along design path in the design attitude of design pipeline 6.
Step 3, with the assembled splicing pipeline of excavation construction.
Step 4, repeat step two and step 3 extremely splice pipeline to design path terminal.
Step 5, the connection installation Zhu Ding mechanisms 3 in the bottom of active well 1.
Step 6, adjust the jacking of Zhu Ding mechanisms 3 and highly and behind jacking direction start jacking.
Step 7, design pipeline 6 to terminal, stop jacking along design path jacking.
Step 8, remove and take out Zhu Ding mechanisms 3.
Step 9, to the surrounding cement injection of design pipeline 6, complete whole construction.
It is shown in Figure 2, a kind of construction method when having a barrier of precast spliced pipe fitting jacking system described in application,
Unlike embodiment one, this example be when to have barrier 8 or design path be curve in the design path for designing pipeline,
Comprise the following steps that：
Step 1, construction working well 1 and received well 2.
Step 2, excavated forward along design path in the design attitude of design pipeline 6.
Step 3, with the assembled splicing pipeline of excavation construction.
Step 4, repeat step two and step 3 are to splicing pipeline along design path assembly to received well.
Step 5, connection installation Zhu Ding mechanisms 3 and push pipe head 5 in the bottom of active well 1.
Step 6, adjust the jacking of Zhu Ding mechanisms 3 and highly and behind jacking direction start jacking.
Step 7, with design pipeline jacking, remove the splicing pipeline before push pipe head.
Step 8, design pipeline 6 stop jacking along design path jacking received well.
Step 9, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms 3 and push pipe head 5.
Step 10, to the surrounding cement injection of design pipeline 6, complete whole construction.
It is shown in Figure 3, construction when a kind of push pipe head of the precast spliced pipe fitting jacking system described in application damages
Method, unlike embodiment one, in this example be in pipeline jack-in process design, the situation that push pipe head damages,
When mechanical breakdown or damage occur in jack-in process for head, conventional construction method can only increase a vertical shaft in Handpiece Location,
Successively excavation supporting takes out head afterwards on earth, maintenance or changes the follow-up continuous jacking of head, and due to head during precession with
The soil body is in close contact, and head of being changed planes after active well taking-up needs the time, and can destroy original soil structures during taking out, specifically
Step is as follows：
Step 1, excavated from received well 2 along design path to push pipe heading.
Step 2, with the assembled splicing pipeline of excavation construction.
Step 3, repeat step one and step 2 are to splicing pipeline along design path assembly to push pipe Handpiece Location.
Step 4, push pipe head is removed, and received well taking-up is transported to by splicing pipeline.
Step 5, new push pipe head is transported by splicing pipeline, starts jacking after replacing.
Step 6, with design pipeline jacking, remove the splicing pipeline before push pipe head.
Step 7, design pipeline 6 stop jacking along design path jacking received well.
Step 8, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms 3 and push pipe head 5.
Step 9, to the surrounding cement injection of design pipeline 6, complete whole construction.
The time that head takes out head of changing planes from active well is so not only saved, improves operating efficiency, and avoid
The possibility of the head destruction soil body is taken out from active well, greatly reduces workload.
The present invention can realize no received well jacking, at the same in complex geological condition and curved jacking pipeline elevation and in
Heart line position precision is high, and speed of application is fast, and the processing in jack-in process during head failure is had a clear superiority, and splices pipe fitting
Repeatable to utilize, cost is relatively low.
Claims (10)
1. a kind of precast spliced pipe fitting jacking system, including Zhu Ding mechanisms（3）, it is characterised in that：Also include along design pipeline（6）
Design path on the splicing pipeline that sets, the splicing internal diameter of the pipeline is more than design pipeline（6）External diameter, splicing pipeline be by
Splice pipe fitting（4）It is spliced；
The splicing pipe fitting（4）For stripe board, its former and later two side corresponds to the axial overlap edge of outstanding formation, left and right respectively
Two sides correspond to the outstanding circumferentially overlapping side of formation respectively；
Coaxial splicing pipe fitting（4）Splice successively upwardly through axial overlap edge along the axle of splicing pipeline and pass through connector
Fastening, with the splicing pipe fitting in week（4）The ring along splicing pipeline splice successively upwardly through circumferentially overlapping side and pass through connection
Part fastens.
2. precast spliced pipe fitting jacking system according to claim 1, it is characterised in that：The Zhu Ding mechanisms（3）Set
In active well（1）Bottom, including the main top that the postnotum and vertical top being connected in active well side wall are connected on postnotum are very heavy
Top；
The Zhu Ding mechanisms（3）Front end be also associated with push pipe head（5）.
3. precast spliced pipe fitting jacking system according to claim 1, it is characterised in that：The cross section of the splicing pipeline
For circular or polygon.
4. precast spliced pipe fitting jacking system according to claim 1, it is characterised in that：The splicing pipe fitting（4）Material
Expect for fiberglass or metal alloy.
5. precast spliced pipe fitting jacking system according to claim 1, it is characterised in that：The splicing internal diameter of the pipeline is more than
Design pipeline（6）The size of external diameter be 10~20cm.
6. a kind of construction method of precast spliced pipe fitting jacking system using described in claim 2 to 5 any one, its feature
It is, comprises the following steps that：
Step 1, construction working well（1）And received well（2）；
Step 2, in design pipeline（6）Design attitude excavated forward along design path；
Step 3, with the assembled splicing pipeline of excavation construction；
Step 4, repeat step two and step 3 are to splicing pipeline along design path assembly to received well；
Step 5, in active well（1）Bottom connection installation Zhu Ding mechanisms（3）With push pipe head（5）；
Step 6, adjust Zhu Ding mechanisms（3）Jacking height and jacking direction after start jacking；
Step 7, design pipeline（6）Along along design path jacking received well, stop jacking；
Step 8, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms（3）With push pipe head（5）；
Step 9, to design pipeline（6）Surrounding cement injection, complete whole construction.
7. construction method according to claim 6, it is characterised in that：
In the step 2, unidirectionally excavated from active well to received well or from active well and received well simultaneously to middle two-way opened
Dig；
In the step 7, with design pipeline jacking, the splicing pipeline before push pipe head is removed.
8. a kind of precast spliced pipe fitting jacking system using described in claim 1 to 5 any one without received well construction party
Method, the situation for received well is limited, can not set by place or its natural conditions, it is characterised in that comprise the following steps that：
Step 1, construction working well（1）；
Step 2, in design pipeline（6）Design attitude excavated forward along design path；
Step 3, with the assembled splicing pipeline of excavation construction；
Step 4, repeat step two and step 3 extremely splice pipeline to design path terminal；
Step 5, in active well（1）Bottom connection installation Zhu Ding mechanisms（3）；
Step 6, adjust Zhu Ding mechanisms（3）Jacking height and jacking direction after start jacking；
Step 7, design pipeline（6）Along design path jacking to terminal, jacking is stopped；
Step 8, remove and take out Zhu Ding mechanisms（3）；
Step 9, to design pipeline（6）Surrounding cement injection, complete whole construction.
9. a kind of precast spliced pipe fitting jacking system using described in claim 2 to 5 any one has applying during barrier
Work method, there is barrier in the design path of design pipeline（8）Or design path is when being curve, it is characterised in that specific
Step is as follows：
Step 1, construction working well（1）And received well（2）；
Step 2, in design pipeline（6）Design attitude excavated forward along design path；
Step 3, with the assembled splicing pipeline of excavation construction；
Step 4, repeat step two and step 3 are to splicing pipeline along design path assembly to received well；
Step 5, in active well（1）Bottom connection installation Zhu Ding mechanisms（3）With push pipe head（5）；
Step 6, adjust Zhu Ding mechanisms（3）Jacking height and jacking direction after start jacking；
Step 7, with design pipeline jacking, remove the splicing pipeline before push pipe head；
Step 8, design pipeline（6）Along along design path jacking received well, stop jacking；
Step 9, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms（3）With push pipe head（5）；
Step 10, to design pipeline（6）Surrounding cement injection, complete whole construction.
10. during a kind of push pipe head damage of precast spliced pipe fitting jacking system using described in claim 2 to 5 any one
Construction method, in pipeline jack-in process is designed, push pipe head damage situation, it is characterised in that specific steps are such as
Under：
Step 1, by received well（2）Excavated along design path to push pipe heading；
Step 2, with the assembled splicing pipeline of excavation construction；
Step 3, repeat step one and step 2 are to splicing pipeline along design path assembly to push pipe Handpiece Location；
Step 4, push pipe head is removed, and received well taking-up is transported to by splicing pipeline；
Step 5, new push pipe head is transported by splicing pipeline, starts jacking after replacing；
Step 6, with design pipeline jacking, remove the splicing pipeline before push pipe head；
Step 7, design pipeline（6）Along along design path jacking received well, stop jacking；
Step 8, respectively by being removed in active well and received well and taking out Zhu Ding mechanisms（3）With push pipe head（5）；
Step 9, to design pipeline（6）Surrounding cement injection, complete whole construction.
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| CN110565779B (en) * | 2019-09-03 | 2021-07-30 | 苏州市平海排水服务有限公司 | Method for trenchless replacement and repair of sewage pipeline |
| CN111810715B (en) * | 2020-06-18 | 2021-09-24 | 中铁工程装备集团有限公司 | Trenchless pipeline updating method and construction system |
| CN111810715A (en) * | 2020-06-18 | 2020-10-23 | 中铁工程装备集团有限公司 | Trenchless pipeline updating method and construction system |
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| CN114319443A (en) * | 2021-12-22 | 2022-04-12 | 深圳市市政工程总公司 | Assembled working well |
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| CN114321495A (en) * | 2021-12-31 | 2022-04-12 | 北京易成市政工程有限责任公司 | Natural gas pipeline jacking pipe construction method |
| CN114857353A (en) * | 2022-04-21 | 2022-08-05 | 中铁一局集团有限公司 | Construction method of jacking pipe internally-penetrated steel sleeve steel steam pipeline |
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