CN202509410U - Follow-up support system for jacking construction of buildings - Google Patents
Follow-up support system for jacking construction of buildings Download PDFInfo
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- CN202509410U CN202509410U CN2012201367264U CN201220136726U CN202509410U CN 202509410 U CN202509410 U CN 202509410U CN 2012201367264 U CN2012201367264 U CN 2012201367264U CN 201220136726 U CN201220136726 U CN 201220136726U CN 202509410 U CN202509410 U CN 202509410U
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Abstract
The utility model relates to a technology of the heightening of bridges, in particular to a follow-up support system for the jacking construction of buildings. The follow-up support system comprises a follow-up shell and a follow-up hydraulic oil cylinder, wherein the follow-up shell is provided with an upper support surface and a lower support surface which are parallel to each other and at least one cavity which is perpendicular to the upper support surface and the lower support surface; the cavity is provided with an opening which is positioned on the lower support surface; the follow-up hydraulic oil cylinder is sleeved in the cavity; the follow-up shell and the follow-up hydraulic oil cylinder are fixed to the bottom of an upper part structure respectively or the follow-up shell and the follow-up hydraulic oil cylinder are fixedly connected and are arranged at the bottom of the upper part structure integrally; the upper support surface is bonded with the bottom of the upper part structure; and the jacking end of the follow-up hydraulic oil cylinder can extend out of the opening or can be retracted into the cavity completely. The follow-up support system is high in safe reliability, synchronicity, operability and integral stressed performance and provides reliable guarantee for the safety of the jacking engineering of the bridges.
Description
Technical field
The utility model relates to bridge and adds high-tech, is specifically related to a kind of servo-actuated support system that is used for the building jack-up construction.
Background technology
In at present present river course, railway, the highway rebuilding, the headroom of bridge and existing linear and the newly-built bridge of bridge be linear, and problem such as to be connected be the difficult point problem in the transformation.Domestic many cross a rivers road super expressway bridge because under-clearance is not enough, is faced with the problem of transformation at present.For the transformation of old bridge, traditional method is old bridge to be removed rebuild, and this is with the labor financial resource and material resource, and construction period is long bigger to social influence.The bridge jacking technology has economical rationality as a kind of novel bridge renovation technique, short construction period, and the advantage less to social environment influence has the conventional method incomparable advantage.In order to reduce as far as possible to social influence, shorten construction period, even do not suspend traffic, need carry out jack-up construction to bridge.
At present, job practices commonly used in the bridge jacking technology is the hydraulic jack jacking, and especially in large-tonnage bridge jacking engineering, hydraulic lifting is a unique selection.The hydraulic jack system can provide powerful top lift, and whole hydraulic jack system is connected by oil pipe, so when jacking, can play a role jointly.Especially synchronization of jacking up technology of hydraulic jack integral jacking system is mature on the whole at present, adopts PLC Hydraulic Synchronizing control jacking successfully utilization in multinomial order engineering.Hydraulic lifting system itself is also as the support system in the bridge jacking engineering in engineering in the past.But there is very big risk in the hydraulic lifting system as support system: if occur letting out in the hydraulic pressure, accident such as oil pipe explosion, the safety of bridge jacking is on the hazard, even immeasurable security incident takes place during jacking.
A kind of automatic following support system and method in Chinese patent 200910046134, have been disclosed; Used in this patent and a kind ofly utilized motor-driven following support device to come to support for superstructure; Measure the distance between following support device and the superstructure through micrometer and controller, control motor rotating drive following support device is followed jacking automatically.The purpose of this method and this system design be when the hydraulic jack decompression as the supplemental support instrument, but have following shortcoming in actual use:
One, the mode that adopts micrometer to measure following support device and superstructure spacing in this method (system) is controlled following support device and is carried out jacking, and this design concept is difficult the realization in practice of construction.Be different from the machining technique field, in technical field of building construction, generally can't accomplish higher precision, the planeness of the bottom of superstructure is relatively poor relatively, in this kind environment, adopts micrometer bigger error can occur.
Even two cast aside above-mentioned error component, above-mentioned following support system still has the problem that can't be overcome.Because micrometer can't measure small distance, cause following support device to fit tightly superstructure and have a gap all the time.Like cut off value mentioned in this patent working example is 1mm, promptly mean the following support device jacking put in place the back and superstructure between still have the gap about 1 mm.Except that the above-mentioned gap that can't be overcome; Through experiment confirm, underpin following support system when stressed when jack-up hydraulic ram is stressed, when being transformed on the following support system along with upper load; Big displacement compression also can appear in following support device; The displacement compression analysis of causes has 2 points: one of which, following support system inside are to adopt mechanical whorl to carry, and bear the load on top through the elastic deformation of mechanical whorl, when the superstructure load is changed; The mechanical whorl parts are compressed, and produce a change in displacement value; Two, owing to the variation of stressed position of the fulcrum, the compressive strain of the superstructure that causes self because following support device can't initiatively follow up, can not be eliminated the deflection of superstructure self.When conversion was stressed, the load of thousands of tons of was transferred to the following support device place by the jack-up hydraulic ram place, and corresponding superstructure produces compressive strain.Can be drawn by above-mentioned principle, when conversion was stressed, superstructure can occur one and significantly fall, and the displacement stroke of this whereabouts is the summation that gap described above adds the top offset compression.Certainly, above-mentioned phenomenon exists equally when the cushion block of routine supports superstructure, but because jack-up hydraulic ram is received in the cylinder process, and load is changed gradually, so the process that superstructure falls is in supported state all the time.And when the jack-up hydraulic ram decompression falls after rise, load moment conversion, this moment, superstructure will fall to be close to the mode that does not have to support, and was breakneck and drop in the construction like this.
Three, plug-in servomotor is bigger on the following support device, makes that the following support device planar dimension is bigger, is difficult for during use installing.
Can know that by above argumentation there are the defective that necessarily can't overcome in actual use in this automatic following support system and method, be applied to and still have bigger risk in the bridge jacking construction.
Summary of the invention
The purpose of the utility model is the weak point according to above-mentioned prior art; A kind of servo-actuated support system that is used for the building jack-up construction is provided; Follow housing and follow hydraulic jack through in the cushion block support system, setting up, make when the oil pressure of oil cylinder suddenly disappears through following hydraulic jack or following housing and still can effectively support top jacking bridge, avoid top bridge landing.
The utility model purpose realizes being accomplished by following technical scheme:
A kind of servo-actuated support system that is used for the building jack-up construction; Relate to the counter-force basis, treat the building superstructure of jacking and be located at said superstructure and the counter-force basis between jack-up hydraulic ram; It is characterized in that: said servo-actuated support system comprises follows housing and follows hydraulic jack; The said housing of following has the upper and lower stayed surface that is parallel to each other; And having the cavity that at least one vertical said upper and lower stayed surface is provided with, said cavity has the opening that is positioned on the said stayed surface down; The said hydraulic jack of following is set in the said cavity; The said housing and said of following is followed hydraulic jack and is individually fixed in said superstructure bottom or the two Joint and integral installation in said superstructure bottom, saidly goes up stayed surface and the applying of said superstructure bottom; Said jacking end of following hydraulic jack can stretch out from said opening/fully in the said cavity of retraction.
Said spacing of following between the upper and lower stayed surface of housing is identical with said jack-up hydraulic ram minimum constructive height.
Saidly follow that the stayed surface outer rim has flange on the housing, said flange through bolt in said bent cap bottom.
The said said relatively surface-supported other end down of housing of following is provided with the installation base plate, and said installation plate upper surface constitutes the said stayed surface of going up, and its soffit is fixedly connected with the said hydraulic jack of following.
Said installation base plate and said bent cap bottom bolt.
Said pedestal of following hydraulic jack is fixed at said superstructure bottom.
The said housing of following of fixed installation on the said sidewall of following hydraulic jack.
Be provided with at least one said hydraulic jack of following in the said cavity of following housing.
Said following has at least two cavitys that have under shed in the housing, separate through deep floor between two adjacent said cavitys, and said deep floor lower surface constitutes said stayed surface down with the said housing lower surface of following; Be set with a described hydraulic jack of following in each described cavity.
The advantage of the utility model is following:
1, the hydraulic jack of following of the utility model adopts machinery to carry, and has avoided accidents such as hydraulic leak or sealing leakage of oil, has good safety reliability with respect to the hydraulic fluid compressing cylinder.
2, the hydraulic jack of following of the utility model adopts hydraulic-driven, follows the top when following jointly at Duo Tai, has guaranteed that many are followed the synchronism that the time spent is done on the top, verification experimental verification this point.The hydraulically powered top of following need not servomotor, thus less with respect to the Mechanical Driven scale of construction, be easy to install and use.
3, the contrast verification through testing for several times; This utility model has very high safety reliability; Have good synchronism, operability and holistic resistant behavior, can suddenly disappear or still can effectively support the top bridge during oil pipe explosion as a kind of oil pressure at oil cylinder rises bridge; Avoid the supporting mechanism of following of top bridge landing, thereby reliable assurance is provided for the bridge jacking engineering safety.
Description of drawings
Accompanying drawing 1 is a bridge jacking state facade structures sketch map;
Accompanying drawing 2 is a bridge jacking position horizontal arrangement sketch map;
Accompanying drawing 3 is the local enlarged diagram of accompanying drawing 1;
Accompanying drawing 5 is followed housing plane structure sketch map for embodiment 2;
Accompanying drawing 6 is followed the shell structure view for embodiment 3.
The specific embodiment
Through embodiment the utility model characteristic and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Shown in Fig. 1-6, label 1-14 representes respectively: continuous box girder 1, bridge pier 2, stayed surface 3, jack-up hydraulic ram 4, follow hydraulic jack 5, flange 6, permanent cushion block 7, interim cushion block 8, follow housing 9, deep floor 10, side plate 11, base plate 12, cavity 13 are installed.
Embodiment 1:
Shown in Fig. 1-3, the superstructure of related bridge adopts three to stride variable cross-section prestressed concrete continuous box girder 1 in the present embodiment, and continuous box girder 1 bottom is supported through bridge pier 2.Referring to Fig. 1, bridge pier 2 comprises two main piers and two abutment piers in the present embodiment.Based on this structure; Present embodiment adopts direct lift-up method; Be the counter-force basis promptly with bridge pier 2 (main pier and abutment pier); Jack-up hydraulic ram 4 is installed between bridge pier 2 and continuous box girder 1 bottom, and through PLC computer Synchronization Control, the method for integral jacking case beam (part, case beam top need reinforce) realizes raising the purpose of main bridge bridge floor absolute altitude.
The servo-actuated support system mainly comprises follows housing 9 and follows hydraulic jack 5.Wherein:
Following housing 9 is the height steel case identical with jack-up hydraulic ram 4 minimum constructive heights, and this steel case is the rectangular-shaped structure of bottom opening, constitutes with the side plate 11 that is vertically welded in installation base plate 12 peripheries by base plate 12 is installed.Following housing lower surface (being the lower surface of side plate 11 in the present embodiment 1) is horizontally disposed with to constitute stayed surface.In following housing 9, by being installed, base plate 12 encloses a downward opening cavity 13 with side plate 11, and be equipped with one in this cavity 13 and follow hydraulic jack 5.
It is when suddenly disappearing for fear of the oil pressure at jack-up hydraulic ram 4 that hydraulic jack 5 is followed in setting, continuous box girder 1 landing.Following hydraulic jack 5 is ordered about by the hydraulic-driven pumping plant and carries out work; Its inner mechanical whorl that adopts carries; Bear the load on top through the elastic deformation of mechanical whorl; Follow hydraulic jack 5 for passive stressed, promptly can bear bigger load, but and the active force that provides much smaller than bearing load.It should be noted that; Compare with documents, the active force of following hydraulic jack 5 can make it hold out against the counter-force basis, and offsets the deflection of a part self and the deflection of superstructure; When jack-up hydraulic ram 4 decompressions fall after rise; During load moment conversion, though superstructure still certain displacement can occur, the displacement of this moment is to receive the support of follow-up hydraulic oil cylinder 4.Follow the inner seal of hydraulic jack 5, be installed into flowline, oil pipe is connected to hydraulic power unit or is called on the control pumping plant.During jacking, open this pumping plant, the oil in the pumping plant gets into through oil pipe and follows in the hydraulic jack 5, follows the inner screw device of hydraulic jack 5 through oil pressure actuated, follows hydraulic jack 5 and follows up automatically; When receiving cylinder, oil return, the oil of following in the hydraulic jack 5 gets into pumping plant.The inside rotary power of following hydraulic jack 5 is provided by hydraulic power unit, through regulating rising and the decline that direction of rotation gets final product implement device.Follow the height of the minimum constructive height of hydraulic jack 5 less than cavity 13, its jacking end can stretch out from the opening part of said cavity 13/the said cavity 13 of retraction in.
The pedestal of following hydraulic jack 5 is fixedly mounted on the installation base plate 12 of following housing 9, follows housing 9 and directly is fixed on the steel plate of case beam 1 bottom, and the steel plate that fits tightly case beam 1 bottom through installation base plate 12 comes bearing load.Referring to Fig. 4, the inboard of following housing 9 installation base plates 12 convexes with some screw rods, and the pedestal of following hydraulic jack 5 is installed on this screw rod.The outside of following housing 9 base plates then is provided with flange 6, through flange 6 with fix with the steel plate bolt of case beam 1 bottom.When mounted, at first will follow hydraulic jack 5 bolts and follow on the installation base plate 12 of housing 9, will follow the steel plate of housing 9 applying case beams 1 bottom afterwards, and pass through the steel plate of bolted flange 6 and case beam 1 bottom.This installation mode can be followed hydraulic jack 5 and the assembling of following housing 9 earlier on ground, integral installation is fixed again, and mounting means is simple relatively.
Construction technology mainly comprises the steps: in the present embodiment
Jack-up hydraulic ram 4 carries out jacking according to single jacking displacement, and control is simultaneously followed hydraulic jack 5 and followed up automatically;
After single jacking displacement was arrived in jack-up hydraulic ram 4 jackings, jack-up hydraulic ram 4 stopped jacking, followed hydraulic jack 5 and stopped follow-up;
Follow hydraulic jack 5 and receive cylinders, put permanent cushion block 7 following between housing 9 and the bridge pier 2 pad afterwards;
Jack-up hydraulic ram 4 is received cylinder, and the stayed surface of following housing 9 compresses permanent cushion block 7 and stressed, and the whole loads of bridge are transformed into by jack-up hydraulic ram 4 and follow on housing 9 and the permanent cushion block 7;
At the interim cushion block 8 of jack-up hydraulic ram 4 held;
After 4 times interim cushion blocks 8 of jack-up hydraulic ram place, repeat above-mentioned steps, arrive a little more than design elevation until jacking;
With screwing on the jack-up hydraulic ram 4 from screw thread; Dismounting is followed hydraulic jack 5 and is followed housing 9, the permanent cushion block 7 of installation and bearing, opening from screw thread on the jack-up hydraulic ram 4 then in the former afterwards space of following housing 9; Case beam 1 falls to design elevation; This moment, bearing was closely connected with permanent cushion block 7, removed jack-up hydraulic ram 4, and main bridge bridge pier 2 is connect height.
Following examples 2-4 except that follow housing 9 and follow hydraulic jack 5 mounting meanss and embodiment 1 different, all the other construction sequences are identical with embodiment 1.So only describe for the structure and the mounting means of following housing 9 and following hydraulic jack 5.
Embodiment 2:
Referring to Fig. 4-5; Follow in the present embodiment 2 and be provided with some deep floors 10 in the housing 9; These deep floor 10 vertical weldings are connected to be installed on the base plate 12, and its both sides end face and the welding of side plate 11 inner surfaces are perhaps welded each other, and the said housing 9 of following is divided into some cavitys 13.In each cavity 13, suit also is fixed with one and follows hydraulic jack 5.The lower surface of deep floor 10 is concordant with the lower surface of side plate 11, and constitutes the stayed surface of following housing.Follow hydraulic jack 5 among the embodiment 2 and be installed in and follow housing 9 modes and follow housing 9 that to be installed in case beam 1 bottom identical with embodiment 1, so repeat no more at this.
Owing to need support for superstructure, use in groups usually so follow hydraulic jack 5.Follow hydraulic jack 5 with one group in the present embodiment 2 and be arranged on one and follow in the housing 9, can effectively save installing space; And deep floor 10 is set following hydraulic jack 5, not only improve the intensity of following housing 9, and increased surface-supported area, dispersive stress.
Embodiment 3:
Referring to Fig. 6, follow housing 9 in the present embodiment 3 and roughly be rectangular-shaped steel square tube, be welded to each other by four blocks of side plates 11 and constitute.Side plate 11 1 end outer rims are welded with the flange 6 that is used for case beam 1 bolt, and the other end constitutes stayed surface.The height of side plate 11 is same identical with jack-up hydraulic ram 4 minimum constructive heights.The inner chamber of following housing 9 hollows is used for suit and follows hydraulic jack 5.
When mounted; Follow housing 9 and to follow hydraulic jack 5 fixing with case beam 1 respectively; The pedestal bolt that at first will follow hydraulic jack 5 is in case beam 1 bottom, will follow housing 9 afterwards and be sleeved on and follow outside the hydraulic jack 5, and through bolt flange 6 and case beam 1 bolt fixed.
Embodiment 4:
Follow housing 9 in the present embodiment 4 and roughly be rectangular-shaped square tube, be welded to each other by four blocks of side plates 11 and constitute.Each piece side plate 11 is all fixed with the outer wall bolt of following hydraulic jack 5.The pedestal bolt of following hydraulic jack 5 is in case beam 1 bottom.
When mounted; At first will following housing 9 suits, to follow hydraulic jack 5 fixing with case beam 1 respectively; At first will follow housing 9 is sleeved on and follows outside the hydraulic jack 5; And will follow housing 9 and be fixed on the outer wall of following hydraulic jack 5, the pedestal bolt that will follow hydraulic jack 5 afterwards is in case beam 1 bottom, accomplishes the relative fixed of the two and case beam 1 thus.
Because to follow housing 9 is not to be fixed on case beam 1 bottom, so it is identical with said jack-up hydraulic ram 5 minimum constructive heights to the spacing of case beam 1 bottom to follow housing 9 stayed surfaces in the present embodiment 1.
Claims (9)
1. servo-actuated support system that is used for the building jack-up construction; Relate to the counter-force basis, treat the building superstructure of jacking and be located at said superstructure and the counter-force basis between jack-up hydraulic ram; It is characterized in that: said servo-actuated support system comprises follows housing and follows hydraulic jack; The said housing of following has the upper and lower stayed surface that is parallel to each other; And having the cavity that at least one vertical said upper and lower stayed surface is provided with, said cavity has the opening that is positioned on the said stayed surface down; The said hydraulic jack of following is set in the said cavity; The said housing and said of following is followed hydraulic jack and is individually fixed in said superstructure bottom or the two Joint and integral installation in said superstructure bottom, saidly goes up stayed surface and the applying of said superstructure bottom; Said jacking end of following hydraulic jack can stretch out from said opening/fully in the said cavity of retraction.
2. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 1 is characterized in that: said spacing of following between the upper and lower stayed surface of housing is identical with said jack-up hydraulic ram minimum constructive height.
3. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 1 is characterized in that: saidly follow that the stayed surface outer rim has flange on the housing, said flange through bolt in said bent cap bottom.
4. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 1; It is characterized in that: the said said relatively surface-supported other end down of housing of following is provided with the installation base plate; Said installation plate upper surface constitutes the said stayed surface of going up, and its soffit is fixedly connected with the said hydraulic jack of following.
5. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 4 is characterized in that: said installation base plate and said bent cap bottom bolt.
6. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 1 is characterized in that: said pedestal of following hydraulic jack is fixed at said superstructure bottom.
7. according to claim 1 or 6 described a kind of servo-actuated support systems that are used for the building jack-up construction, it is characterized in that: the said housing of following of fixed installation on the said sidewall of following hydraulic jack.
8. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 1 is characterized in that: be provided with at least one said hydraulic jack of following in the said cavity of following housing.
9. a kind of servo-actuated support system that is used for the building jack-up construction according to claim 1; It is characterized in that: said following has at least two cavitys that have under shed in the housing; Separate through deep floor between two adjacent said cavitys, said deep floor lower surface constitutes said stayed surface down with the said housing lower surface of following; Be set with a described hydraulic jack of following in each described cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201367264U CN202509410U (en) | 2012-04-01 | 2012-04-01 | Follow-up support system for jacking construction of buildings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201367264U CN202509410U (en) | 2012-04-01 | 2012-04-01 | Follow-up support system for jacking construction of buildings |
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| Publication Number | Publication Date |
|---|---|
| CN202509410U true CN202509410U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201367264U Withdrawn - After Issue CN202509410U (en) | 2012-04-01 | 2012-04-01 | Follow-up support system for jacking construction of buildings |
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| Country | Link |
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| CN (1) | CN202509410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605723A (en) * | 2012-04-01 | 2012-07-25 | 上海城建市政工程（集团）有限公司 | Follow-up support system for building jacking construction |
-
2012
- 2012-04-01 CN CN2012201367264U patent/CN202509410U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605723A (en) * | 2012-04-01 | 2012-07-25 | 上海城建市政工程（集团）有限公司 | Follow-up support system for building jacking construction |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121031 Effective date of abandoning: 20141105 |
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| RGAV | Abandon patent right to avoid regrant |