CN105484170B - One kind becomes the ramp top that oils and inverts precast frame jacking construction method - Google Patents
One kind becomes the ramp top that oils and inverts precast frame jacking construction method Download PDFInfo
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- CN105484170B CN105484170B CN201510944195.XA CN201510944195A CN105484170B CN 105484170 B CN105484170 B CN 105484170B CN 201510944195 A CN201510944195 A CN 201510944195A CN 105484170 B CN105484170 B CN 105484170B
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- precast frame
- jacking
- rod member
- transmission rod
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Become the ramp top that oils the invention discloses one kind and invert precast frame jacking construction method, weak changeover portion is set in knick point, will the coagulation dirt chute abolished, form the basic weak location of soil property；Oil top is inverted in precast frame one end, oil top back seat leans against precast frame and put, the piston boit on oil top is connected with power transmission rod member puts power on back, is applied by oil top to back and applies top power, the jacking that precast frame is moved forward is promoted by oil top back seat；Precast frame jacking → dismounting power transmission rod member → follow-up pours step concrete back seat → installation power transmission rod member → precast frame jacking → dismounting power transmission rod member → follow-up and pours step concrete back seat → installation power transmission rod member → continuation jacking, so circulation, until precast frame presses design jacking in place.The present invention is that a kind of change ramp for ensuring that the continuous-stable for becoming precast frame jacking construction on hill wash road is carried out top that oils inverts precast frame jacking construction method.
Description
Technical field
The present invention relates to a kind of precast frame jacking construction method, particularly a kind of ramp top that oils that becomes inverts precast frame
Jacking construction method.
Background technology
Contain engineering undercrossing tunnel for height row, arrangement and method for construction uses prefabricated in working pit on the outside of railway bed, then frame
Empty railway is in place by design jacking.
After the completion of prefabricated outside precast frame main body is online, it is found that actual elevation and different design are contained in the built draining in upstream -- on
Trip flowing water face absolute altitude is less than the design flowing water face absolute altitude for relating to the newly-built culvert of iron, causes precast frame culvert can not be arranged after being built up by design
Water.To solve culvert drainage problem, it is necessary to carry out reduction processing to relating to iron section culvert design absolute altitude, it is computed, absolute altitude, which declines, to be reached
65cm.Because precast frame is completed by former designed elevation is prefabricated, prefabricated section of jacking slideway of precast frame is by former designed elevation
Formed, the arrangement and method for construction of jacking slideway Slope Treatment is taken after multiple prioritization scheme is than choosing.I.e. in frame structure jack-in process,
Descending grade processing is carried out to jacking slideway, as shown in Figure 1.
Jack-in process sunykatuib analysis is as follows：
Generally, precast frame jacking slideway is in same gradient plane with precast frame design place bottom surface in place
On, that is, precast frame absolute altitude is designed it has been determined that unit in charge of construction determines jacking working pit and cunning further according to design precast frame absolute altitude
Road absolute altitude.And design absolute altitude in place is greatly lowered again after the completion of working pit, slide rail scale height are determined and precast frame is prefabricated
Situation did not occur, it is necessary to be adjusted to jacking slideway substantially, and it is not in a gradient but one to cause jacking slideway
Individual change hill wash road, and be exactly that precast frame is vacantly caused becoming on hill wash road the problem of carrying out precast frame bridges and culverts jacking maximum
Stress may be damaged to precast frame, specific as follows：
1st, original state：Referring to Fig. 2, precast frame is finished by former designed elevation and the gradient are prefabricated, it is prefabricated finish after send out
Existing upstream absolute altitude is lower than former designed elevation, it is necessary to reduction designed elevation, reduction height 0.65m.The prefabricated working pit of precast frame
Slope drop-over is used after slideway and change between design precast frame slideway, jacking slideway is to become hill wash road.
2nd, jacking starts：Referring to Fig. 3,1. precast frame front end is in vacant state, as precast frame moves forward, precast frame
It is less and less with slideway contacting surface, slideway subject come from precast frame deadweight Unit area loading it is increasing, load
Increasingly concentrate, easily slideway structure can be damaged, it is necessary to be reinforced to jacking slideway；2. precast frame leading portion is in
Vacant state, under hanging section Action of Gravity Field, equivalent to being applied with a variable torque on precast frame, with precast frame " on
Knick point " is fulcrum twisting trend clockwise, so that tension occur in precast frame top and bottom top surface, may be led
Cause the destruction of prefabricated frame structure body.
When the 3rd, being equal in weight by Fig. 3 jackings to two ends, that is, when balancing critical condition, referring to Fig. 4, precast frame is overturn
Into ramp：1. now precast frame is born from two ends and moment of torsion equal in magnitude, in opposite direction effect, now prefabricated frame
Frame tension is maximum, is controlled by least favorable load；2. after frame structure body is overturn at side slope point, back-end box structure is lifted, jacking oil top
Had angle with frame structure body, it is necessary to be readjusted and arranged to jacking device；3. after precast frame is overturn, frame structure body exists
One thrust along slope direction also not only is produced to slideway to one vertical pressure of slideway on inclined slip, may be to oblique
Hill wash road produces destruction, it is necessary to be reinforced to inclined slip；4. precast frame above knick point is overturn for fulcrum, prefabricated
The whole weight of framework is pressed at knick point, easily causes the destruction of slideway at knick point, it is necessary to carry out skill to upper knick point
Art consolidation process.
4th, referring to Fig. 5, precast frame is entirely located in ramp：1. the effect of precast frame not bending moment, whole slope is slided
Road is also subjected to frame structure body and produces the thrust along slope direction to slideway, so as to slope except bearing vertical pressure
Slideway produces destruction, it is necessary to be reinforced to inclined slip；2. power transmission rod member needs to act on precast frame via knick point,
Required to ensure that jacking active force is met, corresponding technical finesse need to be done to power transmission rod member.
5th, referring to Fig. 6, precast frame is close to lower knick point：Need to prevent precast frame falling tendency, except by downslide
Road resistance, in addition it is also necessary to take new line measure, is allowed to advance along glide path.
6th, referring to Fig. 7, precast frame passes through lower knick point：1. precast frame one end is acted on glide path, one end effect
On ramp, load power is formed on glide path, ramp respectively, easily slideway is destroyed, also easily to pre-
Framework processed, which is carried, to be caused to damage；2. descend at knick point vacantly, under gravity, frame structure bottom base plate and top board undersurface easily form drawing
Stress and to frame structure into destruction.
7th, referring to Fig. 8, precast frame enters glide path：Precast frame and slideway stress are normal, and power transmission rod member is long, and
Need by upper and lower two knick points, it is to be ensured that the stabilization and normal work of power transmission rod member in jack-in process.
Traditional jacking structural system, is typically made up of back 1, oil top 2, power transmission rod member 3 etc., on single gradient slideway
Jacking, construction, using such as Fig. 9 structural systems.When jacking slideway is becomes hill wash road, such as Figure 10 shows, when precast frame 4 passes through
During upper knick point (such as Fig. 3 and Fig. 4), precast frame 4 is rotated, and rear end is tilted, and the direction of power transmission rod member 3 is not parallel to prefabricated frame
Build bridge and contain axis, so that oil top can not be pushed up power by power transmission rod member is delivered to precast frame bridges and culverts end very well, in some instances it may even be possible to also lead
Cause power transmission rod member loss of stability, it is impossible to proceed precast frame jacking construction.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of company for ensuring to become precast frame jacking construction on hill wash road
The continuous stable change ramp carried out the top that oils inverts precast frame jacking construction method.
In order to solve the above-mentioned technical problem, the change ramp that provides of the present invention top that oils inverts precast frame jacking construction side
Method, it is characterized in that：In knick point, weak changeover portion is set, will the coagulation dirt chute abolished, form basic thin of soil property
Weak location；Oil top is inverted in precast frame one end, oil top back seat leans against precast frame and put, the piston boit and transmission rod on oil top
Part connection puts power on back, is applied by oil top to back and applies top power, promotes precast frame to move forward by oil top back seat
Jacking；Precast frame jacking → dismounting power transmission rod member → follow-up pours step concrete back seat → installation power transmission rod member → pre-
Framework jacking processed → dismounting power transmission rod member → follow-up pours step concrete back seat → installation power transmission rod member → continuation jacking, such as
This circulation, until precast frame presses design jacking in place.
Each precast frame jacking 8m~10m.
Installed in precast frame rear end and invert pallet provided with an oil top, oily overhead is inverted on pallet in You Ding.
Contact surface is respectively provided with one of bar-mat reinforcement before and after adjacent step concrete back seat, and bar-mat reinforcement is mixed away from step
The sealer thickness of solidifying soil back seat is 40mm~60mm.
10mm~30mm steel plates are equipped between power transmission rod member and step concrete back seat.
After precast frame enters ramp, the stress surface of step concrete back seat does a counter-slope, it is ensured that stress surface
Plumbness is in power transmission rod member.
Precast frame jacking construction method is inverted using the change ramp of the above-mentioned technical proposal top that oils, is characterized in：
(1) the problem of, overcoming on change hill wash road because of precast frame top journey length and oblique force transfer rod member vertical stress, it is ensured that
The stability and the abundant stress of step back seat of power transmission rod member slenderness ratio, it is ensured that become jacking construction effect on hill wash road；
(2), overcome precast frame to rotate into after ramp in knick point, it can be ensured that lever up in precast frame rear end
Afterwards, the globality and stability on many oil tops are still able to maintain that, it is ensured that become the company of precast frame jacking construction on hill wash road
It is continuous to carry out；
(3) the oil top, used inverts pallet, in You Ding inverts jack-in process, and oil top will not be corroded by soil or sewage,
It ensure that the operational excellence of oil top equipment；
(4) be, the once brand-new trial of precast frame jacking construction field, when precast frame bridges and culverts it is embedding it is relatively deep, excavate it is deep
When degree is big, construction site is narrow, the periphery amount of moving is big, level of ground water is higher than the conditions such as designed elevation and big intractability, it is contemplated that
Working pit elevation is improved, using change hill wash road mode jacking in place.
In summary, the present invention is a kind of change for ensuring to become the continuous-stable progress of precast frame jacking construction on hill wash road
The ramp top that oils inverts precast frame jacking construction method.
Brief description of the drawings
Fig. 1 is that descending grade processing schematic diagram is carried out to jacking slideway.
Fig. 2 is jack-in process sunykatuib analysis original state schematic diagram.
Fig. 3 is that jack-in process sunykatuib analysis jacking starts schematic diagram.
Fig. 4 is jack-in process sunykatuib analysis balance critical condition schematic diagram.
Fig. 5 is that jack-in process sunykatuib analysis precast frame is entirely located in ramp view.
Fig. 6 is jack-in process sunykatuib analysis precast frame close to lower knick point schematic diagram.
Fig. 7 is that jack-in process sunykatuib analysis precast frame passes through lower knick point schematic diagram.
Fig. 8 is that jack-in process sunykatuib analysis precast frame enters glide path schematic diagram.
Fig. 9 is traditional jacking structural system schematic diagram.
Figure 10 is that traditional jacking structural system uses schematic diagram.
Figure 11 is the primary prospect figure of the present invention.
Figure 12 is the Bettering id eas figure of the present invention.
Figure 13 is the top view of the step concrete back seat of the present invention.
Figure 14 is that the place before and after knick point of the present invention sets the schematic diagram of weak changeover portion.
Figure 15 is that the oil top of the present invention inverts the structural representation of pallet.
Figure 16 is that the oil top of the present invention inverts the structure top view of pallet.
Figure 17 is the first circulation schematic diagram of the construction procedure of the present invention.
Figure 18 is the second circulation schematic diagram of the construction procedure of the present invention.
Figure 19 is the 3rd circulation schematic diagram of the construction procedure of the present invention.
Figure 20 is the 4th circulation schematic diagram of the construction procedure of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Figure 11, oil top 2 is inverted in the one end of precast frame 4, the back seat on oil top 2 leans against precast frame 4 and put, oil top
2 piston boit is connected with power transmission rod member 3 puts power on back 1, is applied by oil top 2 to back 1 and applies top power, according to active force
With the principle of reaction force, the jacking that precast frame 4 is moved forward is promoted by 2 back seats of oil top.
Shown according to Figure 11, technology is inverted, it is necessary to solve following Railway Project becoming to push up using oil on hill wash road：
1. the top of precast frame 4 journey reaches 60m, and power transmission rod member 3 is inclined, and power transmission may be caused in jack-in process
The loss of stability of rod member 3；The vertical plane of back 1 and the out of plumb of power transmission rod member 3, cause oil top 2 to push up the loss of power, 2 active forces of oil top
It can not completely put on precast frame 4, influence the effect of jacking construction；
2. precast frame 4 is rotated into after ramp in knick point, and the rear end of precast frame 4 levers up height nearly 0.2m, no
Beneficial to the installation and jacking operation on rearmounted oil top 2；
3. oil top 2 is inverted in the rear end of precast frame 4, in naked state, is not only easily made dirty, is drenched by soil or sewage
Influence oil top performance, shortens the service life on oil top 2, and after precast frame 4 is tilted via knick point rear end, oil top 2 will
It is scattered, it is necessary to re-start mounting arrangements, and because precast frame rear end is vacantly tilted, be also unfavorable for the stable peace on oil top
Dress.
1st, there is problem 1. for primary prospect, followed up using step concrete back seat 5, specific practice is：Prefabricated frame
8~the 10m of jacking of frame 4 → dismounting power transmission rod member 3 → follow-up pours step concrete back seat 5 → installation power transmission rod member → prefabricated frame
8~the 10m of jacking of frame 4 → dismounting power transmission rod member 3 → follow-up pours step concrete back seat 5 → installation power transmission rod member 3 → continuation
8~10m of jacking, circulated with this analogize → until precast frame 4 by design jacking in place, it is specific such as Figure 12 and Figure 13.
2nd, there is problem 2. for primary prospect, place sets weak changeover portion 9 before and after knick point 8, will the concrete
Slideway 10 is abolished, and the weak location on soil property basis is formed, referring to Figure 14.
Weak changeover portion 9 is set, on the one hand because the weak geology of changeover portion 9 is weaker, when precast frame 4 is via change slope
During point 8, because the weak geology of changeover portion 9 is sunk, contact area can be increased, and gradually uniformly sunk, be unlikely to cause prefabricated
The unexpected upset of framework 4, and the suddenly change of the stress of precast frame 4 is caused, stress increasing degree is also reduced to a certain extent；
On the other hand, due to the uniform sinking of weak changeover portion 9, it is possible to reduce the height that the rear end of precast frame 4 is tilted, in precast frame
After 4 upsets, it is unlikely to cause the change on the oil top 2 inverted.
3rd, there is problem 3. for primary prospect, to solve protection and the integrity issues on oil top 2, after precast frame 4
Mounting design one oil top in end inverts pallet 11, and oil top 2 is arranged on oil top and inverted on pallet 11.Oil top inverts pallet 11 and used
The welding of 10mm~30mm steel plates is made, preferably 20mm steel plates, and specific physical dimension is according to the width of precast frame 4, oil top 2
Height and length and determine, see Figure 15 and Figure 16.
(3) other technologies measure：
1. bar-mat reinforcement is set：In jack-in process, for ensure step concrete back seat 5 surface not because top power it is excessive and
Concrete surface is caused to be destroyed, the contact surface before and after adjacent step concrete back seat 5 is respectively provided with one of bar-mat reinforcement 6,
Sealer thickness of the bar-mat reinforcement 6 away from step concrete back seat 5 is 40mm~60mm, preferably 50mm.
2. the setting of steel plate：To ensure that step concrete back seat 5 because the top power on oil top 2 is excessive and destroyed, is not being passed
Add the thick steel plates 7 of 10mm~30mm between power rod member 3 and step concrete back seat 5 to be protected, preferably 20mm；
3. the setting of step concrete back seat counter-slope：Referring to Figure 12, after precast frame 4 enters ramp, transmission rod
The stress surface of part 3 and step concrete back seat 5 is in an angle, may cause the loss for pushing up power, and easily cause transmission rod
The unstability of part 3, therefore, in the work progress of step concrete back seat 5 is carried out, by the stress surface of step concrete back seat 5
Do a counter-slope 12, it is ensured that stress surface is in plumbness with power transmission rod member 3.
The Construction Technology of With standing Operation general layout of the present invention is as follows：
According to continuous analysis, demonstration and the optimization that jacking precast frame bridge construction scheme is inverted to oil top, pass through step
The follow-up of concrete back seat, oil top invert pallet use and the setting of changeover portion, have substantially solved and have carried out oil on change hill wash road
The problem of top inverts jacking construction, overall plan is as follows：
First circulation：Referring to Figure 17, when precast frame 4 is located at up gradient, by Figure 17 placement oil top 2, power transmission rod member 3 and oil
Top inverts pallet 11, steel plate 7, synchronous averaging oil top 2, and because power transmission rod member 3 and back 1 are fixing ends, precast frame 4 is activity
End, is acted on by power transmission rod member 3 and back 1, and by precast frame 4,8~10m is moved in jacking in the direction of arrows.It is moved through in jacking
Cheng Zhong, need to be via weak changeover portion 9, and under the Action of Gravity Field of precast frame 4, the weak ground of changeover portion 9 uniformly sinks with jacking, no
The only contact area of the increase bottom of precast frame 4 and ground, and reduce the height that the rear end of precast frame 4 is levered up.
Second circulation：Referring to Figure 18, after 8~10m of first circulation jacking, power transmission rod member 3 is removed, by first circulation jacking
8~10m pass using concreting step concrete back seat 5, after step concrete back seat 5 reaches intensity, again
Power transmission rod member 3 and oil top 2 are installed, continue 8~10m of jacking；
3rd circulation：Referring to Figure 19, after 8~10m of second circulation jacking, power transmission rod member 3 is removed, by second circulation jacking
8~10m use concreting step concrete back seat 5, after step concrete back seat 5 reaches intensity, pacify again
Power transmission rod member 3 and oil top 2 are filled, continues 8~10m of jacking；
4th circulation：Referring to Figure 20, after the 3rd 8~10m of circulation jacking, power transmission rod member 3 is removed, jacking is circulated by the 3rd
8~10m use concreting step concrete back seat 5, after step concrete back seat 5 reaches intensity, pacify again
Power transmission rod member 3 and oil top 2 are filled, continues 8~10m of jacking；
By that analogy, until by designed elevation and plane jacking in place.
Claims (6)
1. one kind change ramp oils, top inverts precast frame jacking construction method, it is characterized in that：In knick point, weak transition is set
Section, i.e., abolished the coagulation dirt chute at knick point, forms the weak location on soil property basis；Oil top is inverted in prefabricated frame
Frame one end, oil top back seat leans against precast frame and put, and the piston boit on oil top is connected with power transmission rod member puts power on back, passes through oil
Push up to back and apply top power, the jacking that precast frame is moved forward is promoted by oil top back seat；Precast frame jacking → dismounting power transmission
Rod member → follow-up pour step concrete back seat → installation power transmission rod member → precast frame jacking → dismounting power transmission rod member → with
Enter to pour step concrete back seat → installation power transmission rod member → continuation jacking, so circulation, until precast frame is pushed up by design
Enter in place.
2. change ramp according to claim 1 oils, top inverts precast frame jacking construction method, it is characterized in that：It is pre- every time
Framework jacking 8m~10m processed.
3. change ramp according to claim 1 or 2 oils, top inverts precast frame jacking construction method, it is characterized in that：
Precast frame rear end installs an oil top and inverts pallet, and oily overhead is inverted on pallet in You Ding.
4. change ramp according to claim 1 or 2 oils, top inverts precast frame jacking construction method, it is characterized in that：
The front and rear contact surface of adjacent step concrete back seat is respectively provided with one of bar-mat reinforcement, and bar-mat reinforcement is away from step concrete back seat
Sealer thickness is 40mm~60mm.
5. change ramp according to claim 1 or 2 oils, top inverts precast frame jacking construction method, it is characterized in that：
The steel plate that thickness is 10mm~30mm is equipped between power transmission rod member and step concrete back seat.
6. change ramp according to claim 1 or 2 oils, top inverts precast frame jacking construction method, it is characterized in that：When
Precast frame enters after ramp, and the stress surface of step concrete back seat does a counter-slope, it is ensured that stress surface and power transmission rod member
In plumbness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510944195.XA CN105484170B (en) | 2015-12-16 | 2015-12-16 | One kind becomes the ramp top that oils and inverts precast frame jacking construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510944195.XA CN105484170B (en) | 2015-12-16 | 2015-12-16 | One kind becomes the ramp top that oils and inverts precast frame jacking construction method |
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| CN105484170A CN105484170A (en) | 2016-04-13 |
| CN105484170B true CN105484170B (en) | 2017-07-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0492038A (en) * | 1990-08-07 | 1992-03-25 | Kazuyuki Hiratsuka | Setting machine for concrete drain etc. |
| JPH04108997A (en) * | 1990-08-29 | 1992-04-09 | Komatsu Ltd | Leading pipe direction correcting device for small-bore pipe pusher |
| CN2898194Y (en) * | 2006-02-27 | 2007-05-09 | 上海市机械施工有限公司 | Step-by-step reaction base for hydraulic top pushing |
| CN103032071A (en) * | 2012-12-09 | 2013-04-10 | 中铁十二局集团有限公司 | Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space |
| CN204570499U (en) * | 2015-03-13 | 2015-08-19 | 中铁二十四局集团有限公司 | A kind of large span vertical curve steel box-girder walking type pushing device |
| CN204703530U (en) * | 2015-05-06 | 2015-10-14 | 上海绿地建设(集团)有限公司 | For the thrustor of Construction of Steel Structure |
-
2015
- 2015-12-16 CN CN201510944195.XA patent/CN105484170B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0492038A (en) * | 1990-08-07 | 1992-03-25 | Kazuyuki Hiratsuka | Setting machine for concrete drain etc. |
| JPH04108997A (en) * | 1990-08-29 | 1992-04-09 | Komatsu Ltd | Leading pipe direction correcting device for small-bore pipe pusher |
| CN2898194Y (en) * | 2006-02-27 | 2007-05-09 | 上海市机械施工有限公司 | Step-by-step reaction base for hydraulic top pushing |
| CN103032071A (en) * | 2012-12-09 | 2013-04-10 | 中铁十二局集团有限公司 | Shield receiving forward-shift construction method of boulder group open excavation and embedment mutation space |
| CN204570499U (en) * | 2015-03-13 | 2015-08-19 | 中铁二十四局集团有限公司 | A kind of large span vertical curve steel box-girder walking type pushing device |
| CN204703530U (en) * | 2015-05-06 | 2015-10-14 | 上海绿地建设(集团)有限公司 | For the thrustor of Construction of Steel Structure |
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| Publication number | Publication date |
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| CN105484170A (en) | 2016-04-13 |
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