CN204040021U - Large diameter pile construction equipment system in city underground engineering tunneling pilot tunnel - Google Patents
Large diameter pile construction equipment system in city underground engineering tunneling pilot tunnel Download PDFInfo
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- CN204040021U CN204040021U CN201420050664.4U CN201420050664U CN204040021U CN 204040021 U CN204040021 U CN 204040021U CN 201420050664 U CN201420050664 U CN 201420050664U CN 204040021 U CN204040021 U CN 204040021U
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Abstract
Disclosing large diameter pile construction equipment system in a kind of city underground engineering tunneling pilot tunnel, mainly comprising clean-out machine (1), Pulp pump (2), mud and water separating equipment (3), slush pump (4), mud car (5), mobile job crane (6), first filling car (7) and the grout pipe line (8) for transporting boring mud, mud.Based on existing bore forming equipment, consider the feature of narrow space, circumstance complication in tunneling pilot tunnel, large diameter pile construction equipment system in tunneling pilot tunnel is improved, ensure that pile efficiency and the pile quality of large diameter pile construction in small space, effectively can reduce city underground engineering construction to the impact of periphery building, earth's surface traffic and underground utilities, to similar engineering, there is important reference value.
Description
Technical field
The utility model relates to large diameter pile construction equipment system in a kind of city underground engineering tunneling pilot tunnel, belongs to underground structrue engineering field of construction machinery.
Background technology
Along with the fast development of urban rail transit construction, the construction environment of city underground engineering is increasingly sophisticated, and how ensureing construction safety and reducing construction affects the problem having become engineering staff and be concerned about most on surrounding enviroment.Cavern-pile method (PBA) is a kind of conventional metro station construction engineering method, and it has little on surrounding enviroment impact and controls the effective advantage of stratum deformation.First cavern-pile method construction performs " stake-beam-arch " system in the little pilot tunnel of leading tunneling, then under the protection of this support system, carries out subsequent construction, to ensure the safety of building around.Therefore, the construction of tunneling pilot tunnel internal drilling castinplace pile is a committed step of cavern-pile method, and construction technology is relative maturity.
But, for large diameter bored pile construction in pilot tunnel, due to pilot tunnel narrow space, enough mud amounts required in boring procedure cannot be deposited in hole, and the restriction being subject to steric requirements in pilot tunnel also can not be applied by traditional pile-forming equipment.In addition, a large amount of boring mud outward transports produced in boring procedure are also needed to expend huge cost of labor.Therefore, be necessary to develop a set of novel pile-forming equipment system, to adapt to construction environment feature in pilot tunnel, meet pile quality requirement in pilot tunnel.Improve existing pile-forming equipment according to execution conditions in pilot tunnel, have important practical significance, there is not been reported in relevant research work.
Summary of the invention
The purpose of this utility model to be to provide under a kind of complex environment large diameter pile construction equipment system in city underground engineering tunneling pilot tunnel.This system is based on existing pile-forming equipment system, consider construction environment feature in pilot tunnel, enabling to adapt to that construction space in tunneling pilot tunnel is narrow and small, the feature of circumstance complication by improving system, ensure that pile efficiency and the pile quality of large diameter pile construction in pilot tunnel.
The improvement of the utility model to device systems mainly comprises:
(1) system layout.According to construction environment feature in pilot tunnel, first filling car and mud car are arranged near stake holes, arrange the capable system of rail in pilot tunnel, adopt driven by power, stop to pollute; Mud and water separating equipment and mud pit are arranged in ground, and various grout pipe line all lays along pilot tunnel sidewall.
(2) hole-drilling system can be subdivided into four subsystems, i.e. drilling system, dreg removing system, sludge-water separating system and benefit slurry system.
1. drilling system.For the feature of narrow space in pilot tunnel, change existing clean-out machine size, the clean-out machine length after repacking is 5.0m, and width is 2.2m, the sub-4.0m of rig body frame, drilling rod degree of one-tenth 1.2m.
2. dreg removing system.Cancel the slag stock tank be arranged in pilot tunnel or in vertical shaft, by arranging high-power Pulp pump, the boring mud produced in boring procedure directly being drained into earth's surface, not only solving the problem of insufficient space in pilot tunnel, also save huge people's cost that in pilot tunnel, slag slurry transport point needs.
3. sludge-water separating system.Mud and water separating equipment is 2 cover ZX-250 type mud purifying devices, is arranged at ground.Isolated mud cake and sandy gravel enter interim dregs field, wait for and abandoning outside entrucking, it is for subsequent use that isolated liquid mud is then discharged into mud pit, and the isolated mud moisture content of mud and water separating equipment is within 15%, proportion, between 1.01-1.1, meets the requirement of mud needed for clean-out machine.Mud property after should ensureing clear hole in work progress is not less than the performance of fresh mud, and the thickness of mud is measured by lining rope.
4. slurry system is mended.Mud car is adopted to carry out benefit slurry, be arranged at stake holes side, it is connected with the variable frequency pump in surface mud pond by feed pipe for mortar, arranges electromagnetic valve in mud car, is controlled the opening and closing of electromagnetic pump by sensor, ensure the mud liquid level stabilizing in mud car, mud car bottom arranges manually-operated gate, according to the mud influx in the slurry thickness Artificial Control stake holes that lining rope measures, ensures slurry liquid face balance, realize mud circulation and boring mud outward transport, until pore-forming.
(3) filling concrete system.It is the key ensureing quality of concreting that concrete head fills with operation, cannot meet that underwater concreting head fills with continuously, a difficult problem fast to overcome long-distance pumping concrete, first car of filling with is set in stake holes side and carries out head filling operation, before pile concrete is built, first head is filled with tank and fills concrete by employing ground pump, then opens first tank valve of filling with and completes concrete head filling.
Accompanying drawing explanation
Fig. 1 is large diameter pile construction equipment system drawing in pilot tunnel of the present utility model.Wherein, 1 is clean-out machine, and 2 is Pulp pump, and 3 is mud and water separating equipment, 4 is slush pump, and 5 is mud car, and 6 is mobile job crane, 7 first filling cars, 8 is grout pipe line, and 9 is mud pit, 10 is dregs field, and 11 is stake holes, and 12 is cofferdam, 13 is just prop up base plate, and 14 just prop up top boards, and 15 is foundation pit side-wall, 16 is tunnel, and 17 is vertical shaft, and 18 is ground.
Fig. 2 is clean-out machine organigram of the present utility model.Wherein, 19 is gravel pump, and 20 is unit head, and 21 is drilling derrick, and 22 is jointed rod, and 23 is chassis, and 24 for stablize temporary guide base.
Fig. 3 is mud car organigram of the present utility model.Wherein, 25 is flange, and 26 is shaft, and 27 is grout outlet, and 28 is motor, and 29 is steel pipe pull bar, and 30 is manually-operated gate, and 31 is liquid level visualization pipe.
Fig. 4 is mobile job crane organigram of the present utility model.
Fig. 5 is that head of the present utility model fills with car organigram.
Detailed description of the invention
Station, Olympic Green is Beijing Metro No. 15 lines and No. 8 line transfer stations.Station is positioned at Olympic Games center, and below the city tunnel of great Tun road, the west side of reserved public transport node, lays along great Tun road East and West direction.Circumferential distribution has the Olympic venues such as National Convention Center, National Indoor Stadium, the Water Cube, Bird's Nest.
Station agent structure be underground two-layer three across flat top wall structure, station overall length 205.5m, beam overall 23.1m, tunnel, great Tun road is close to by station top board, and great Tun road tunnel upper earthing is about 3.5m.Station agent structure arranges 4 pilot tunnels, and station king-pile leads in-cavity construction 2 centres.King-pile has two kinds of specifications, a kind of diameter 1800mm, the long 30m of stake, and hole depth is about 44.58m ~ 44.61m, another kind of diameter 1800mm, the long 22m of stake, and hole depth is about 36.61m ~ 36.65m, amounts to 58.
Station king-pile Construction Plan adopts 2 cover Grouping apparatus, and every complete equipment is each is responsible for a middle drift, and configures a set of travelling hoist support respectively, carries out reinforcing bar cage hoisting.Sequence of construction is from West to East, adopts the mode of jumping stake to construct, and jumps pilespacing and determines from according to equipment block length.
Construction material transport channel is No. 2 vertical shafts and precipitation pilot tunnel.Slurry transportation pipeline in boring procedure lays in No. 3 vertical shafts and transverse passage-way thereof.
Specific construction step is:
(1) surveying setting-out.
Track laying, grid cut, all will carry out surveying setting-out before drilling construction.Subpackage unit survey crew goes out control point and stake position according to the horizontal control network measuring in design drawing, and measuring result, after general contracting unit survey crew is checked, is filled in single inspection, reported management, can use after management acceptance(check).In addition, all need again to check stake position before every pile construction.
(2) manually digging hole construction.
The sequence of construction of manually digging hole is that measurement and positioning → abolish base plate just to prop up and reinforce → borehole → installation reinforcing bar and template → sprayed mortar → inspection stake position central axis and absolute altitude → lifting appliance of inspecting for acceptance → suppose.
(3) Immersed tunnel.
Immersed tube adopts external diameter 2m, the steel pipe of wall thickness 1.4cm, total length 14.85m, standard knot length 2.5m, and steel pipe adopts the processing of Q235 steel.Digging in immersed tube, utilizes the mode pore-forming that immersed tube deadweight is sunk.Shoveling diameter is 2.1m, and shoveling mode is behaved work excavation, cuts the earth and answers layering, evenly, symmetrically carries out.Immersed tube top arranges mounting flange, and immersed tube adopts cripple's muscle that mounting flange and the main muscle of pilot tunnel base plate grid are welded as entirety after being sink to design elevation, and sets three rows in immersed tube bottom opening and lock pin anchor tube, fixes at the bottom of pipe.After Immersed tunnel completes, clay is adopted to be backfilled in hole closely knit, to ensure the safety of subsequent mechanical pore-forming.
(4) drilling construction.
Adopt Pump breath countercirculate technique to carry out bore operation, every stake all prepares mud by 1.5 times of pile body volume before spudding in.When utilizing clean-out machine (1) to drive piles, adopt gravel pump that the mud and water separating equipment (3) that slag slurry is directly delivered to earth's surface through high-power Pulp pump (2) after the interior extraction of stake holes (11) is carried out mud purification, filter out sand wherein and impurity, improve mud property.Then the premium mud after improvement is entered in surface mud storage pool (9), by slush pump (4), premium mud is sent in stake holes (11) afterwards, realize the mud balance in hole.
Whole bore process can be subdivided into four subsystems: hole-drilling system, dreg removing system, sludge-water separating system and benefit slurry system.
1. drilling system
Pilot tunnel is of a size of 4.7m × 5.7m (wide × high), and existing rig cannot meet own dimensions requirement and the requirement of large diameter pile pore-forming simultaneously, therefore is carried out reequiping to adapt to bore forming requirement in pilot tunnel by 60P45A type rig unit according to pilot tunnel bulk.
2. dreg removing system
Plasma discharge is realized by Pulp pump (2) and grout pipe line (8).Slag slurry in boring is directly disposed to the mud separation equipment (3) on ground after being extracted out by the gravel pump that rig carries through high-power Pulp pump (2) and grout pipe line (8).Grout pipe line (8) specification is φ 200, t=6mm, maximum dispatch distance about 150m.
3. mud cleaning system
Adopt black whirlwind mud purifying device ZX-500A (3) to filter out sand in mud and impurity, improve the toughness of slurry coat method, improve mud property, treated premium mud enters in surface mud pond (9) for subsequent use.
4. slurry system is mended
Generous amount slush pump (4) is set in surface mud pond, adopts grout pipe line (8) to send in stake holes (11) in the mud in mud pit, realize the level balance of mud in hole.Grout pipe line (8) is of a size of φ 150, t=4.5mm, and dispatch distance is about 150m.
After every stake pore-forming during concrete perfusion, in stake holes (11), be directly delivered to ground by the mud of concrete replacement.Because pile body volume is large, cause the mud property displaced to be deteriorated, and due to mortar and concrete pollution, the mud displaced and boring mud cannot reuse, contaminated discarded slurry adopts after draining into ground outside special tank car and abandons, and the boring mud of accumulation is outer after admixing quicklime to be abandoned.According to field trial, after in stake holes, undisturbed soil becomes boring mud, volume will increase by 30%, can reach outward transport requirement after every drill with ferrule slag need admix 200kg quicklime.
(5) reinforcing cage, forbay are installed.
Reinforcing cage hangs in hole through No. 2 vertical shaft portal frames, often saves length 2m, and the main muscle of adjacent two joint reinforcing cage adopts screwed pipe joint.In first segment reinforcing cage and second section reinforcing cage junction, add load box needed for test pile.After load box installs, 3 sound detecting pipes and 3 madjack pipes are each passed through hole reserved in upper and lower two planes of load box, and sound detecting pipe flushes with at the bottom of stake, and bottom madjack pipe, mud jacking head is lower than 20cm at the bottom of stake.Adopt the reinforcing bar with reserved displacement meter same diameter on load box, butt welding with it.Often save after fastener for connection, the mouth of pipe flushes with stake top, and uses protective cap special shutoff.Reinforcing cage adopts tricycle to carry out horizontal transport in pilot tunnel, adopts mobile job crane (6) to lift.
(6) filling concrete.
Because pile body volume is large, infusion time and pumping distance, require that concrete has the larger slump (requiring high-thin arch dam) and longer initial setting time, and require strict to concrete workability.By analysis, determine that pile body C30 concrete mix is every cubic metre of consumption and is: cement 290kg, water 177kg, sand 824kg, stone 824kg, flyash 116kg, MNC-HH type high-efficient retarder 11.65kg, breeze 60kg.
Before filling concrete, the cement mortar of same label is first adopted to carry out profit pipe.The head that cannot meet underwater concreting requirement due to long-distance pumping concrete in hole fills with continuously, fast, therefore arrange a first car (7) of filling with and carry out head filling operation.Before perfusion pile concrete, first adopt the ground pump head filled with by head on car (7) to fill with in tank and fill concrete, the valve then opened below first filling tank completes concrete head and fills with.
Must carry out super filling after filling concrete absolute altitude reaches design elevation, super filling is highly 1800mm.
(7) pile crown cuts.
After having constructed, first engineering staff enters in steel bushing and is removed by high-density slurry, then adopts sledgehammer and chisel by profit pipe mortar and pile crown super filling concrete chisel removal.
The foregoing is only an embody rule case of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. large diameter pile construction equipment system in a city underground engineering tunneling pilot tunnel, comprise clean-out machine, Pulp pump, mud and water separating equipment, slush pump, mud car, mobile job crane, first fill with car and for transporting boring mud, the grout pipe line of mud, it is characterized in that: by grout pipe line, clean-out machine is directly connected with high-power Pulp pump, again high-power Pulp pump is connected with the mud and water separating equipment on ground, near mud and water separating equipment, mud pit is set, slush pump in mud pit is connected with the mud car being arranged on stake holes side by grout pipe line, mobile job crane and first car of filling with are arranged on stake holes side.
2. large diameter pile construction equipment system in a kind of city underground engineering tunneling pilot tunnel according to claim 1, is characterized in that: first filling car and mud car are arranged near the stake holes in pilot tunnel, arrange the capable system of rail in pilot tunnel, adopt driven by power; Mud and water separating equipment and mud pit are arranged in ground, and various pipeline all lays along pilot tunnel sidewall.
3. large diameter pile construction equipment system in a kind of city underground engineering tunneling pilot tunnel according to claim 1, it is characterized in that: mending slurry system is the mud car being arranged at stake holes side, it is connected with the variable frequency pump in surface mud pond by feed pipe for mortar, in mud car, electromagnetic valve is set, controlled the opening and closing of electromagnetic pump by sensor, mud car bottom arranges manually-operated gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050664.4U CN204040021U (en) | 2013-02-07 | 2014-01-23 | Large diameter pile construction equipment system in city underground engineering tunneling pilot tunnel |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310049130.X | 2013-02-07 | ||
| CN 201310049130 CN103174132A (en) | 2013-02-07 | 2013-02-07 | Construction method of minor diameter pile inside city underground construction underground excavation pilot tunnel |
| CN201310049128.2 | 2013-02-07 | ||
| CN 201310049128 CN103174131A (en) | 2013-02-07 | 2013-02-07 | Underground engineering guiding-cavity-excavating small-diameter pile construction complete equipment system |
| CN201420050664.4U CN204040021U (en) | 2013-02-07 | 2014-01-23 | Large diameter pile construction equipment system in city underground engineering tunneling pilot tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204040021U true CN204040021U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050664.4U Expired - Fee Related CN204040021U (en) | 2013-02-07 | 2014-01-23 | Large diameter pile construction equipment system in city underground engineering tunneling pilot tunnel |
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| Country | Link |
|---|---|
| CN (1) | CN204040021U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631439A (en) * | 2014-12-31 | 2015-05-20 | 上海市机械施工集团有限公司 | Pump suction reverse circulation pile foundation construction device and method |
| CN105804059A (en) * | 2014-12-31 | 2016-07-27 | 上海市机械施工集团有限公司 | Cast-in-situ bored pile hole-forming device and method |
| CN108825154A (en) * | 2018-07-10 | 2018-11-16 | 中铁局集团第二工程有限公司 | Mechanical piling mud circulating system and construction method in hole |
| CN111042137A (en) * | 2019-12-18 | 2020-04-21 | 付志成 | Underground pilot tunnel construction mud circulation system |
-
2014
- 2014-01-23 CN CN201420050664.4U patent/CN204040021U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631439A (en) * | 2014-12-31 | 2015-05-20 | 上海市机械施工集团有限公司 | Pump suction reverse circulation pile foundation construction device and method |
| CN105804059A (en) * | 2014-12-31 | 2016-07-27 | 上海市机械施工集团有限公司 | Cast-in-situ bored pile hole-forming device and method |
| CN105804059B (en) * | 2014-12-31 | 2018-03-02 | 上海市机械施工集团有限公司 | Drilling pouring pile hole device and method |
| CN108825154A (en) * | 2018-07-10 | 2018-11-16 | 中铁局集团第二工程有限公司 | Mechanical piling mud circulating system and construction method in hole |
| CN111042137A (en) * | 2019-12-18 | 2020-04-21 | 付志成 | Underground pilot tunnel construction mud circulation system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20190123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |