CN215668985U - Oil pressure type automatic height-adjusting support and bridge - Google Patents
Oil pressure type automatic height-adjusting support and bridge Download PDFInfo
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- CN215668985U CN215668985U CN202121997441.5U CN202121997441U CN215668985U CN 215668985 U CN215668985 U CN 215668985U CN 202121997441 U CN202121997441 U CN 202121997441U CN 215668985 U CN215668985 U CN 215668985U
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Abstract
The utility model relates to an oil pressure type automatic height adjusting support and a bridge. The automatic height adjusting support comprises a top groove, a steel support and a bottom groove; the top groove is arranged above the bottom groove; the steel support comprises a crown body, a middle shaft and a base, wherein two ends of the middle shaft are respectively connected with the crown body and the base; the crown body is connected with the top groove, and an elastic layer is arranged between the crown body and the top groove; the bottom groove is provided with an inner cavity, the base is arranged in the inner cavity of the bottom groove and can move up and down along the inner cavity of the bottom groove, the upper end of the bottom groove is provided with a through hole communicated with the inner cavity, and the middle shaft penetrates through the through hole; a sealing structure is arranged between the base and/or the middle shaft and the bottom groove, and the middle shaft, the bottom groove and the sealing structure enclose an upper oil pressure cavity with variable volume; the bottom of the bottom groove is provided with an elastic supporting layer; the oil pressure cavity is filled with hydraulic oil, and the base is provided with a one-way oil drainage mechanism. The height of the support can be adjusted in a self-adaptive manner, so that the upper structure of the bridge is protected from being influenced when foundation settlement occurs.
Description
Technical Field
The utility model relates to the field of bridge engineering, in particular to an oil pressure type automatic height adjusting support and a bridge.
Background
The bridge support is an important component of a bridge structure, is an important part for connecting an upper structure and a lower structure of the bridge, and has the functions of safely and effectively transmitting various loads (static, dynamic and impact loads) borne by the upper structure to the abutment and simultaneously ensuring that deformation (horizontal displacement and corner) of the upper structure under the factors of load, temperature change, concrete shrinkage and the like cannot generate adverse effects on the lower structure such as the abutment and the like. The performance of the bridge is directly affected by the reliability of the stress performance of the bridge and the safety of operation.
Bridge beam supports can be divided into two categories according to the difference of the use functions: a fixed support and a sliding support. The fixed bearing is also called a fixed hinged bearing and is used for transmitting vertical stress and horizontal force, so that the bridge superstructure bearing is allowed to rotate in a vertical plane but is limited to generate displacement in a horizontal direction. The sliding support is divided into a one-way sliding support and a multi-way sliding support according to whether the sliding direction of the sliding support is limited or not, and the sliding support only transmits vertical stress, so that the sliding support can freely rotate and translate when factors such as load, temperature change, concrete shrinkage and creep act on a bridge span.
The bridge bearing can be divided into a steel bearing, a reinforced concrete bearing, a rubber bearing and a special bearing (such as a damping bearing, a tension bearing and the like) according to materials. Aiming at the conventional structure, a plate type rubber support is mostly adopted; when the demand of high earthquake resistance is high, a basin-type rubber support or an earthquake reduction and isolation support is mostly adopted.
At present, the common supports for highway bridges are mainly three, namely a plate type rubber support, a basin type rubber support and a spherical support. The plate type rubber support realizes the horizontal displacement of the support through the shearing deformation of rubber, and realizes the micro-rotation of the support by utilizing the uneven elastic compression of the rubber; the basin-type rubber support obtains larger horizontal displacement through the low friction coefficient of the polytetrafluoroethylene plate, realizes the rotation of the support by utilizing the uneven compression of the rubber blocks, and obtains larger supporting capacity by utilizing the three-way pressed rubber blocks in the basin. The spherical support realizes the rotation of the support through the sliding of the spherical surface sliding plate on the spherical crown lining plate, and realizes the horizontal displacement through the upper support plane sliding plate.
The existing bridge support can realize horizontal displacement, corner rotation and reliable load transmission. But cannot provide vertical displacement when sinking against the foundation. With the rapid increase of the demand of bridge construction, the geological environment of the bridge site is gradually diversified, such as soft rock stratum, soft soil foundation, ground crack active area and the like. Meanwhile, as the span of the bridge increases, bridge types such as continuous beams and continuous rigid frames are widely adopted. The soft soil foundation shifts, ground crack activity etc. can cause the basis to subside, and then destroys the linear shape and the wholeness of continuous roof beam and continuous rigid frame bridge superstructure, leads to the girder fracture even, and the light person influences the security and the comfort level that the vehicle went, and the heavy person leads to the unable operation of bridge.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model aims to provide an oil pressure type automatic height adjusting support and a bridge.
The technical scheme adopted by the utility model is as follows:
an oil pressure type automatic height-adjusting support comprises a top groove, a steel support and a bottom groove;
the top groove is arranged above the bottom groove;
the steel support comprises a crown body, a middle shaft and a base, wherein two ends of the middle shaft are respectively connected with the crown body and the base;
the crown body is connected with the top groove, and an elastic layer is arranged between the crown body and the top groove;
the bottom groove is provided with an inner cavity, the base is arranged in the inner cavity of the bottom groove and can move up and down along the inner cavity of the bottom groove, the upper end of the bottom groove is provided with a through hole communicated with the inner cavity, and the middle shaft penetrates through the through hole; a sealing structure is arranged between the base and/or the middle shaft and the bottom groove, and the middle shaft, the bottom groove and the sealing structure enclose an upper oil pressure cavity with variable volume; the bottom of the bottom groove is provided with an elastic supporting layer;
the hydraulic oil that has filled in the pressure chamber that oils is equipped with one-way draining mechanism on the base, one-way draining mechanism can make the hydraulic oil flow direction of the pressure chamber that oils below to the base.
Preferably, the bottom of the top groove is inwards provided with a cavity for embedding the crown body, and the radial size of the opening part of the cavity is smaller than that of the crown body and larger than that of the middle shaft; a gap with a preset distance is reserved between the top of the crown body and the top of the cavity, and the elastic layer is filled in the gap.
Preferably, the top surface of the crown body is a spherical crown shape; the spherical center corresponding to the top surface of the crown body is positioned on the axis of the middle shaft, the top of the cavity is in a spherical crown shape, the radius of the top of the cavity is the same as that of the top surface of the crown body, and the spherical center corresponding to the top of the cavity is positioned on the axis of the middle shaft.
Preferably, the surface of the middle shaft, which is in contact with the through hole in the bottom groove, and the surface of the base are provided with isolating layers for preventing hydraulic oil from corroding;
the isolating layer on the base is provided with a through hole for the circulation of hydraulic oil at the inlet and outlet of the one-way oil drainage mechanism.
Preferably, the one-way oil drainage mechanism comprises a stepped hole arranged on the base, and a blocking ball, a blocking net and a spring which are arranged in the stepped hole, wherein the stepped hole comprises a small-diameter section positioned on the upper side and a large-diameter section positioned on the lower side; the blocking ball, the blocking net and the spring are arranged in the large-diameter section, the blocking net is fixedly connected with the large-diameter section, the blocking ball is arranged above the blocking net, and the spring is arranged between the blocking ball and the blocking net and is in a compressed state;
the lower extreme of path section is equipped with the sphere chamfer with separation ball surface adaptation, can realize sealed to path section lower extreme after separation ball and the sphere chamfer contact.
Preferably, the sealing structure arranged between the base and/or the middle shaft and the bottom groove adopts an elastic sealing plug which is arranged at the upper part of the base and close to the through hole on the bottom groove.
Preferably, the elastic sealing plug comprises an outer layer elastic sealing plug and an inner layer elastic sealing plug, the lower part of the inner layer elastic sealing plug is connected with the base, and the upper part of the inner layer elastic sealing plug is connected with the upper wall of the inner cavity of the bottom groove; the outer layer elastic sealing plug is positioned between the inner layer elastic sealing plug and the middle shaft, the lower part of the outer layer elastic sealing plug is connected with the middle shaft, and the upper part of the outer layer elastic sealing plug is connected with the upper wall of the inner cavity of the bottom groove.
Preferably, the elastic supporting layer comprises a plurality of layers of steel plates and a plurality of layers of rubber plates, and the plurality of layers of steel plates and the plurality of layers of rubber plates are stacked alternately.
Preferably, a plurality of one-way oil drainage mechanisms are uniformly distributed in the circumferential direction of the base; the middle shaft is sleeved with an elastic sealing ring which is positioned between the top groove and the bottom groove; the elastic layer is made of ultra-high molecular weight polyethylene plate;
the top of the top groove extends outwards to form a flange plate, and a plurality of top groove bolt preformed holes are arranged on the flange plate at equal intervals along the circumferential direction;
the bottom of the bottom groove extends outwards to form a flange plate, and a plurality of bottom groove bolt preformed holes are arranged on the flange plate at equal intervals along the circumferential direction;
the top groove, the kerve, the inner cavity of the kerve, the crown body, the middle shaft and the base are all cylindrical.
The utility model also provides a bridge, which comprises a main beam, support cushion stones and the oil pressure type automatic height adjusting support, wherein the main beam is positioned above the support cushion stones, the oil pressure type automatic height adjusting support is arranged between the main beam and the support cushion stones, the top of the top groove is connected with the main beam, and the bottom of the bottom groove is connected with the support cushion stones.
The utility model has the following beneficial effects:
in the oil pressure type automatic height adjusting support, the bottom groove is provided with an inner cavity, the base is arranged in the inner cavity of the bottom groove and can move up and down along the inner cavity of the bottom groove, so that the base can move relative to the steel support along with the settlement of the bridge foundation, the self-adaptive height adjustment of the foundation can be realized, a sealed chamber is formed between the inner cavity of the base and the base of the steel support, and the sealed chamber is used as a lower oil pressure chamber; the sealing structure is arranged between the base and/or the middle shaft and the bottom groove, the middle shaft, the bottom groove and the sealing structure enclose an upper oil pressure cavity with variable volume, hydraulic oil is filled in the upper oil pressure cavity, the base is provided with a one-way oil drainage mechanism, the one-way oil drainage mechanism can enable the hydraulic oil in the upper oil pressure cavity to flow to the lower part of the base, so that when the base and a steel support move relatively (the relative movement is that the bottom groove moves downwards relative to the steel support), the volume of the lower oil pressure cavity can be increased, negative pressure is generated inside the lower oil pressure cavity, at the moment, the hydraulic oil in the upper oil pressure cavity flows into the lower oil pressure cavity through the one-way oil drainage mechanism due to the arrangement of the one-way oil drainage mechanism, when the pressure in the lower oil pressure cavity and the upper oil pressure cavity is balanced, the one-way oil drainage mechanism can stop an oil way and prevent the hydraulic oil in the lower oil pressure cavity from flowing back to the upper oil pressure cavity, and therefore new balance can be achieved in the vertical direction of the bridge, therefore, the self-adaptive adjustment of the bridge settlement is realized. Wherein set up elastic support layer and elastic layer and can prevent that the steel shotcrete from respectively with the kerve and the rigid contact between the groove, play certain shock attenuation, cushioning effect, guarantee whole oil pressure formula automatically regulated height support job stabilization nature, security and life. In conclusion, the height of the support can be adjusted in a self-adaptive manner, so that the superstructure of the bridge is protected from being influenced when foundation settlement occurs.
Drawings
FIG. 1 is a schematic structural diagram of an oil pressure type automatic height adjusting support according to an embodiment of the present invention after being installed;
FIG. 2 is a top view of an oil pressure type automatic height adjusting support according to an embodiment of the present invention;
fig. 3(a) is a schematic structural diagram of a one-way oil drainage mechanism in the embodiment of the utility model, and fig. 3(b) is a schematic structural diagram of a blocking net;
FIG. 4 is a schematic diagram of a top groove structure according to an embodiment of the present invention;
FIG. 5 is a schematic view of a steel support structure according to an embodiment of the present invention;
FIG. 6 is a top view of a base of a steel support in an embodiment of the present invention;
FIG. 7 is a schematic view of a bottom groove structure according to an embodiment of the present invention;
FIG. 8 is a schematic top view of a bottom trough in an embodiment of the present invention;
FIG. 9(a) is a front view of an elastic sealing ring according to an embodiment of the present invention; FIG. 9(b) is a top view of the elastic sealing ring;
in the figure, 1-first finish-rolled deformed steel bar, 2-main beam, 3-top steel backing plate, 4-top groove, 4-1-bolt hole, 5-first nut, 6-first bolt, 7-ultra-high molecular weight polyethylene plate, 8-steel support, 9-elastic sealing ring, 9-1-elastic sealing ring center hole, 10-isolation layer, 11-outer layer elastic sealing plug, 12-inner layer elastic sealing plug, 13-upper oil pressure cavity, 14-bottom groove, 14-1-through hole, 15-one-way oil drain pipe, 16-lower oil pressure cavity, 17-steel plate, 18-rubber, 19-bottom steel backing plate, 20-second bolt, 21-second nut, 22-support cushion stone, 23-second finish-rolled deformed steel bar, 24-thin tube, 25-thick tube, 26-blocking ball, 27-blocking net, 28-spring, 29-crown top, 30-crown body, 31-middle shaft, 32-base, 33-groove body, 34-flange plate, 35-cavity, 36-top groove bolt preformed hole and 37-bottom groove bolt preformed hole.
Detailed Description
The utility model is further described below with reference to the figures and examples.
Referring to fig. 1, 5, 7 and 8, the oil pressure type automatic height adjusting support of the present invention comprises a top groove 4, a steel support 8 and a bottom groove 14; the top groove 4 is arranged above the bottom groove 14; the steel support 8 comprises a crown body 30, a middle shaft 31 and a base 33, wherein two ends of the middle shaft 31 are respectively connected with the crown body 30 and the base 33; the crown body 30 is connected with the top groove 4, and an elastic layer is arranged between the crown body 30 and the top groove 4; the bottom groove 14 is provided with an inner cavity, the base 33 is arranged in the inner cavity of the bottom groove 14 and can move up and down along the inner cavity of the bottom groove 14, the upper end of the bottom groove 14 is provided with a through hole communicated with the inner cavity, and the middle shaft 31 penetrates through the through hole; a sealing structure is arranged between the base 33 and/or the middle shaft 31 and the bottom groove 14, and the middle shaft 31, the bottom groove 14 and the sealing structure enclose an upper oil pressure cavity 13 with variable volume; the bottom of the bottom groove 14 is provided with an elastic supporting layer; the hydraulic oil that has filled in last pressure chamber 13 has hydraulic oil, is equipped with one-way draining mechanism on base 33, one-way draining mechanism can make the hydraulic oil flow direction in last pressure chamber 13 below base 33.
As a preferred embodiment of the present invention, referring to fig. 1, 4 and 5, the bottom of the top slot 4 is inwardly opened with a cavity 35 for embedding the crown body 30, and the radial dimension of the mouth of the cavity 35 is smaller than the radial dimension of the crown body 30 and larger than the radial dimension of the central axis 31, so that the structure can increase the contact area between the crown body 30 and the top slot 4 and reduce the contact pressure; a gap with a preset distance is left between the top of the crown body 30 and the top of the cavity 35, and the elastic layer is filled in the gap.
Referring to fig. 1, 4 and 5, as a preferred embodiment of the present invention, the top surface of the crown body 30 is a spherical crown shape; the spherical center corresponding to the top surface of the crown body 30 is located on the axis of the middle shaft 31, the top of the cavity 35 is in a spherical crown shape, the radius of the top of the cavity 35 is the same as that of the top surface of the crown body 30, the spherical center corresponding to the top of the cavity 35 is located on the axis of the middle shaft 31, the cavity 35 and the crown body 30 are in a spherical crown shape, the structure can allow the crown body 30 and the cavity 35 to slightly rotate, and the edge parts of the cavity 35 and the crown body 30 are not deformed due to the rotation, so that the stability of the structure of the cavity 35 and the crown body 30 is ensured, and the force transmission and supporting effects are further ensured; the centre of the sphere of the spherical cap is located on the axis of the middle shaft 31, so that the force transmission effect of the middle shaft 31 can be ensured.
As a preferred embodiment of the present invention, referring to fig. 1 and 5, the surface of the center shaft 31 contacting the through hole of the bottom groove 14 and the surface of the base 33 are provided with the isolation layer 10 for preventing the corrosion of the hydraulic oil; the isolating layer 10 on the base 33 is provided with a through hole for flowing the hydraulic oil at the inlet and outlet of the one-way oil drainage mechanism, the isolating layer 10 can prevent the corrosion of the hydraulic oil to the middle shaft 31 and the base 33, and can effectively ensure the sealing between the base 33 and the bottom groove 14 and the smooth relative sliding.
Referring to fig. 1, 3(a) and 5, the one-way oil drainage mechanism comprises a stepped hole formed in a base 33, a blocking ball 26, a blocking net 27 and a spring 28, wherein the blocking ball, the blocking net 27 and the spring 28 are arranged in the stepped hole; the blocking ball 26, the blocking net 27 and the spring 28 are arranged in the large-diameter section, the blocking net 27 is fixedly connected with the large-diameter section, the blocking ball 26 is arranged above the blocking net 27, and the spring 28 is arranged between the blocking ball 26 and the blocking net 27 and is in a compressed state; the lower end of the small-diameter section is provided with a spherical chamfer matched with the surface of the blocking ball 26, the blocking ball 26 can seal the lower end of the small-diameter section after contacting with the spherical chamfer, the structure is simple, hydraulic oil can only move in a single direction, and the stability of the whole support after self-adaptive adjustment is ensured.
Referring to fig. 1, as a preferred embodiment of the present invention, an elastic sealing plug is used as a sealing structure arranged between the base 33 and/or the middle shaft 31 and the bottom groove 14, and the elastic sealing plug is arranged on the upper portion of the base 33 and close to the through hole on the bottom groove 14, and the elastic sealing plug can play a role of sealing on one hand and can also deform on the other hand, so that the upper oil pressure chamber 13 can deform when the lower oil pressure chamber 16 generates negative pressure, and the hydraulic oil can smoothly flow into the lower oil pressure chamber 16 from the upper oil pressure chamber 13.
Referring to fig. 1, as a preferred embodiment of the present invention, the elastic sealing plug comprises an outer layer elastic sealing plug 11 and an inner layer elastic sealing plug 12, wherein the lower part of the inner layer elastic sealing plug 12 is connected with the base 33, and the upper part of the inner layer elastic sealing plug 12 is connected with the upper wall of the inner cavity of the bottom groove 14; the outer layer elastic sealing plug 11 is positioned between the inner layer elastic sealing plug 12 and the middle shaft 31, the lower part of the outer layer elastic sealing plug 11 is connected with the middle shaft 31, and the upper part of the outer layer elastic sealing plug 11 is connected with the upper wall of the inner cavity of the bottom groove 14.
Referring to fig. 1 and 7, as a preferred embodiment of the present invention, the elastic support layer includes a plurality of steel plates 17 and a plurality of rubber plates 18, and the plurality of steel plates 17 and the plurality of rubber plates 18 are alternately stacked.
As a preferred embodiment of the present invention, referring to fig. 6, a plurality of unidirectional oil drainage mechanisms are uniformly distributed in the circumferential direction of the base 33, so that it can be ensured that hydraulic oil in the upper oil pressure chamber 13 can rapidly and stably enter the lower oil pressure chamber 16 in a relatively balanced manner on the whole horizontal plane, and the sensitivity of the present invention in adaptive adjustment is ensured; referring to fig. 1, 9(a) and 9(b), an elastic sealing ring 9 is sleeved on the middle shaft 31, and the elastic sealing ring 9 is located between the top groove 4 and the bottom groove 14; the elastic layer adopts an ultra-high molecular weight polyethylene plate 7; referring to fig. 4, a flange plate is formed by extending the top of the top slot 4 outwards, a plurality of top slot bolt preformed holes 36 are arranged on the flange plate at equal intervals along the circumferential direction, referring to fig. 7 and 8, a flange plate is formed by extending the bottom of the bottom slot 14 outwards, and a plurality of bottom slot bolt preformed holes 37 are arranged on the flange plate at equal intervals along the circumferential direction; the top groove 4, the bottom groove 14, the inner cavity of the bottom groove 14, the crown body 30, the middle shaft 31 and the base 33 are all cylindrical.
Referring to fig. 1, the utility model further provides a bridge, which comprises a main beam 2, support cushion stones 22 and the oil pressure type automatic height adjusting support, wherein the oil pressure type automatic height adjusting support is provided in the utility model, the main beam 2 is located above the support cushion stones 22, the oil pressure type automatic height adjusting support is arranged between the support cushion stones 22 and the main beam 2, the top of the top groove 4 is connected with the main beam 2, and the bottom of the bottom groove 14 is connected with the support cushion stones 22.
The utility model also provides a working method of the bridge, which comprises the following processes with reference to fig. 1-9 (b):
when the foundation of the bridge is not settled: the steel support 8 is supported by an elastic support layer at the bottom of the bottom groove 14, the top groove 4 is supported by the steel support 8, and the main beam 2 is supported by the top groove 4; or, a preset distance is reserved between the base 33 of the steel support 8 and the elastic support layer at the bottom of the bottom groove 14, and the lower oil pressure cavity 13 defined by the bottom groove 14, the elastic support layer and the base 33 is filled with hydraulic oil, at this time, the elastic support layer supports the hydraulic oil in the lower oil pressure cavity 13, the hydraulic oil in the lower oil pressure cavity 13 supports the steel support 8, the steel support 8 supports the top groove 4, and the top groove 4 supports the girder 2;
when the foundation of the bridge is settled, the support cushion 22 descends along with the settlement of the foundation, the bottom groove 14 descends along with the support cushion 22, the bottom groove 14 and the steel support 8 move relatively, so that the distance between the base 33 of the steel support 8 and the elastic support layer at the bottom of the bottom groove 14 is increased, the volume of the lower oil pressure cavity 13 is increased, negative pressure is generated in the lower oil pressure cavity 13, hydraulic oil in the upper oil pressure cavity 13 enters the lower oil pressure cavity 13 from the one-way oil drainage mechanism by utilizing the negative pressure, and the increased space of the lower oil pressure cavity 13 is compensated by the hydraulic oil entering the lower oil pressure cavity 13;
when the foundation of the bridge is settled stably, the vertical displacement of the bridge is stable, and the one-way oil drainage mechanism stops the oil way.
Examples
The oil pressure type automatic height adjusting support comprises a top groove 4, an ultra-high molecular weight polyethylene plate 7, an elastic sealing ring 9, a steel support 8, an outer layer elastic sealing plug 11, an inner layer elastic sealing plug 12, a bottom groove 14, a rubber layer 18 and a steel plate 17. See fig. 1 to 9(b) for details.
As shown in fig. 1 and 4, the top groove 4 is a hollow steel cylinder, the main structure of the top groove 4 is a steel cylinder groove body 33 with a cavity inside, the edge of the top surface extends outwards to form a flange plate 34, and 4 bolt preformed holes 36 are arranged on the flange plate 34 at equal intervals along the circumferential direction; the center of the bottom surface is provided with a hole and is expanded upwards to a spherical crown-shaped supporting surface to form an internal cavity 35 of the top groove 4, which is shown in detail in figure 4;
the steel support 8 is a steel crown cylinder and comprises a crown 29, a crown body 30, a middle shaft 31, a base 32 and a one-way oil drainage pipe 15. The main body of the steel support 8 is a cylindrical middle shaft 31; the section of the middle shaft 31 is enlarged and extends upwards to form a cylindrical crown body 30; the section of the crown body 30 extends upwards and gradually reduces to form a crown top 29, and the crown top 29 and the crown body 30 are combined to form a flange-type spherical crown support; the central shaft 31 has an enlarged cross section and extends downwardly to form an enlarged cylindrical base 32. The base 32 is symmetrically provided with four groups of one-way oil drainage pipes 15 at equal intervals along the circumference, and each group comprises two one-way oil drainage pipes. See fig. 5-6 for details.
The bottom groove 14 is of a cylindrical steel barrel-shaped structure, a through hole 14-1 is formed in the center of the top, the through hole 14-1 is a round hole, and the diameter of the through hole is slightly larger than that of the central shaft 30 of the steel support 8; the bottom is sealed, and inside steel sheet 17 and the rubber slab 18 of placing in turn forms the elastic support of steel shotcrete 8 bottom, and the bottom of kerve 14 outwards extends and forms flange board 19, and flange board 19 arranges 4 bolt preformed holes 37 along the circumferencial direction equidistant. See fig. 7-8 for details.
The oil pressure chamber is the inside cavity and the sealed structure, including last oil pressure chamber 13 and lower oil pressure chamber 16, including isolation layer 10, outer elastic sealing plug 11, inlayer elastic sealing plug 12 and one-way draining pipe 15. The upper oil pressure cavity 13 and the lower oil pressure cavity 16 are filled with high boiling point heat transfer oil, and are communicated with each other through a one-way oil drainage pipe 15 (namely, a one-way oil drainage mechanism), the high boiling point heat transfer oil in the upper oil pressure cavity 13 can flow into the lower oil pressure cavity 16 through the one-way oil drainage pipe 15, and the high boiling point heat transfer oil in the lower oil pressure cavity 16 can not flow into the upper oil pressure cavity 16 through the one-way oil drainage pipe 15. See figure 1 for details.
The upper oil pressure cavity 13 and the lower oil pressure cavity 16 are respectively positioned at the upper side and the lower side of the base 32 of the steel support 8. Isolation layer 10 is put to steel shotcrete 8 and last oil pressure chamber 13, 16 contact surface equipartitions in lower oil pressure chamber to prevent that the high boiling point conduction oil in last oil pressure chamber 13 and the lower oil pressure chamber 16 from passing through steel shotcrete 8 and 14 curb plate contact gap circulations of kerve, also prevent that the high boiling point conduction oil in last oil pressure chamber 13 from leading to the pressure release from last oil pressure chamber 13 and 8 contact gap outflow outsides of steel shotcrete. The contact part of the upper oil pressure cavity 13 and the steel support 8 is further doubly sealed by the inner layer elastic sealing plug 12 and the outer layer elastic sealing plug 11 to form a completely sealed oil pressure cavity, and the high boiling point heat conduction oil in the cavity can only flow from top to bottom through the one-way oil drainage pipe 15. See figure 1 for details.
The one-way oil drain pipe 15 is formed by connecting two hollow round steel pipes and comprises a thin pipe 24, a thick pipe 25, a blocking ball 26, a blocking net 27 and a spring 28. The diameter of the thin tube 24 is slightly smaller than the radius of the blocking ball 26 and is communicated with the upper oil pressing cavity 13; the diameter of the thick pipe 25 is larger than that of the blocking ball 26 and is communicated with the lower oil pressure chamber 16. The isolation ball 26 is a polytetrafluoroethylene ball. The screen 27 is a circular mesh structure with the same diameter as the wide tube 25 and is welded into the wide tube at a distance from the top of the wide tube equal to the sum of the diameter of the blocking ball 26 and the height of the spring 28. A spring 28 is placed on the screen 27. See figure 3 for details.
The installation process of the oil pressure type automatic height adjusting support of the embodiment is as follows:
an ultra-high molecular weight polyethylene plate 7 is stuck on the spherical crown-shaped supporting surface at the top of the cavity 35 of the top groove 4 to form an elastic contact surface with the crown 29 of the steel support 8.
The method comprises the steps that finish-rolled deformed steel bar 1 with the nominal diameter of 32cm is embedded at the bottom of a main beam 2, a steel base plate 3 is preset at the bottom supporting position of the main beam and is welded and fixed with the finish-rolled deformed steel bar 1, bolts are welded at positions corresponding to 344 bolt preformed holes of flange plates of a top groove 4, the top groove 4 is fixedly connected with the main beam 2 through bolts and nuts, and the main beam 2 is connected with a support.
The inside pre-buried nominal diameter of support base stone 22 is the finish rolling screw-thread steel of 32cm to at the pre-buried steel sheet in top, correspond position department welding bolt in 4 bolt preformed holes on 14 flange boards 19 with the kerve, be connected with the nut through the bolt and consolidate kerve 14 and support base stone 22, realize the consolidation of kerve 15 and pier capping beam.
After the installation is finished, a new bridge structure is formed.
The working process of the new bridge is as follows:
after the support is arranged at the joint of the upper and lower structures of the bridge through the embodiment, the support can play the functions of transferring load, restraining deformation and the like under normal conditions.
When the bridge is positioned in the areas with poor geological conditions such as a soft soil foundation, a ground crack active area and the like, or when the geological conditions and the basic conditions are influenced by other factors and subside, the self-adaptive height adjustment can be realized by the support, so that the deformation of the upper structure of the bridge due to the settlement of the foundation is avoided, and the normal use of the bridge structure is ensured.
As shown in fig. 1, when the vertical displacement is generated due to the foundation settlement in the bridge substructure, the support bottom groove 14 is consolidated with the support base stone 22, so that the support bottom groove 14 synchronously generates downward vertical displacement, the top plate of the bottom groove 14 extrudes the upper oil pressure cavity 13, the high-boiling-point heat transfer oil in the upper oil pressure cavity 13 flows downward through the one-way oil drainage pipe 15 after being extruded, and then the separation ball 26 is pushed to extrude the spring 28 to move downward, so that the lower opening of the thin pipe 24 is opened to be communicated with the thick pipe 25, the high-boiling-point heat transfer oil enters the lower oil pressure cavity 16, the high-boiling-point heat transfer oil in the lower oil pressure cavity 16 cannot flow upward due to the limitation of the one-way oil drainage pipe 15, and the support height is maintained by hydraulic pressure, thereby realizing the self-adaptive adjustment and maintenance of the support height. After settlement occurs, the height difference of the upper structure and the lower structure of the bridge due to the settlement of the foundation is compensated by the height increase of the support, so that the bridge realizes new balance under the condition that the upper structure does not generate vertical displacement.
Claims (10)
1. An oil pressure type automatic height adjusting support is characterized by comprising a top groove (4), a steel support (8) and a bottom groove (14);
the top groove (4) is arranged above the bottom groove (14);
the steel support (8) comprises a crown body (30), a middle shaft (31) and a base (33), wherein two ends of the middle shaft (31) are respectively connected with the crown body (30) and the base (33);
the crown body (30) is connected with the top groove (4), and an elastic layer is arranged between the crown body (30) and the top groove (4);
the bottom groove (14) is provided with an inner cavity, the base (33) is arranged in the inner cavity of the bottom groove (14) and can move up and down along the inner cavity of the bottom groove (14), the upper end of the bottom groove (14) is provided with a through hole communicated with the inner cavity, and the middle shaft (31) penetrates through the through hole; a sealing structure is arranged between the base (33) and/or the middle shaft (31) and the bottom groove (14), and the middle shaft (31), the bottom groove (14) and the sealing structure enclose an upper oil pressure cavity (13) with variable volume; the bottom of the bottom groove (14) is provided with an elastic supporting layer;
the hydraulic oil feeding device is characterized in that hydraulic oil is filled in the upper oil pressure cavity (13), a one-way oil drainage mechanism is arranged on the base (33), and the one-way oil drainage mechanism can enable the hydraulic oil in the upper oil pressure cavity (13) to flow to the lower part of the base (33).
2. The oil pressure type automatic height-adjusting support saddle according to claim 1, wherein the bottom of the top groove (4) is provided with a cavity (35) for embedding the crown body (30) inwards, and the radial dimension of the opening part of the cavity (35) is smaller than that of the crown body (30) and larger than that of the middle shaft (31); a gap with a preset distance is reserved between the top of the crown body (30) and the top of the cavity (35), and the elastic layer is filled in the gap.
3. An oil pressure type automatic height-adjusting support according to claim 1, wherein the top surface of the crown body (30) is a spherical crown shape; the spherical center corresponding to the top surface of the crown body (30) is positioned on the axis of the middle shaft (31), the top of the cavity (35) is in a spherical crown shape, the radius of the top of the cavity (35) is the same as that of the top surface of the crown body (30), and the spherical center corresponding to the top of the cavity (35) is positioned on the axis of the middle shaft (31).
4. An oil pressure type automatic height-adjusting support according to claim 1, wherein the surface of the middle shaft (31) contacting with the through hole of the bottom groove (14) and the surface of the base (33) are provided with an isolating layer (10) for preventing the erosion of hydraulic oil;
the isolation layer (10) on the base (33) is provided with a through hole for the circulation of hydraulic oil at the inlet and outlet of the one-way oil drainage mechanism.
5. The oil pressure type automatic height-adjusting support seat according to claim 1, wherein the one-way oil drainage mechanism comprises a stepped hole formed in the base (33), and a blocking ball (26), a blocking net (27) and a spring (28) which are arranged in the stepped hole, and the stepped hole comprises a small-diameter section at the upper side and a large-diameter section at the lower side; the blocking ball (26), the blocking net (27) and the spring (28) are arranged in the large-diameter section, the blocking net (27) is fixedly connected with the large-diameter section, the blocking ball (26) is arranged above the blocking net (27), and the spring (28) is arranged between the blocking ball (26) and the blocking net (27) and is in a compressed state;
the lower extreme of path section is equipped with the sphere chamfer with separation ball (26) surface adaptation, can realize sealing to path section lower extreme after separation ball (26) and sphere chamfer contact.
6. An oil pressure type automatic height-adjusting support seat according to claim 1, characterized in that the sealing structure arranged between the base (33) and/or the middle shaft (31) and the bottom groove (14) adopts an elastic sealing plug which is arranged at the upper part of the base (33) and close to the through hole on the bottom groove (14).
7. The oil pressure type automatic height adjusting support according to claim 6, wherein the elastic sealing plug comprises an outer layer elastic sealing plug (11) and an inner layer elastic sealing plug (12), the lower part of the inner layer elastic sealing plug (12) is connected with the base (33), and the upper part of the inner layer elastic sealing plug (12) is connected with the upper wall of the inner cavity of the bottom groove (14); the outer layer elastic sealing plug (11) is positioned between the inner layer elastic sealing plug (12) and the middle shaft (31), the lower part of the outer layer elastic sealing plug (11) is connected with the middle shaft (31), and the upper part of the outer layer elastic sealing plug (11) is connected with the upper wall of the inner cavity of the bottom groove (14).
8. An oil pressure type automatic height-adjusting support according to claim 1, wherein the elastic supporting layer comprises a plurality of steel plates (17) and a plurality of rubber plates (18), and the plurality of steel plates (17) and the plurality of rubber plates (18) are alternately stacked.
9. The oil pressure type automatic height-adjusting support saddle according to claim 1, wherein a plurality of one-way oil drainage mechanisms are uniformly distributed on the circumference of the base (33); an elastic sealing ring (9) is sleeved on the middle shaft (31), and the elastic sealing ring (9) is positioned between the top groove (4) and the bottom groove (14); the elastic layer adopts an ultra-high molecular weight polyethylene plate (7);
the top of the top groove (4) extends outwards to form a flange plate, and a plurality of top groove bolt preformed holes (36) are arranged on the flange plate at equal intervals along the circumferential direction;
the bottom of the bottom groove (14) extends outwards to form a flange plate, and a plurality of bottom groove bolt preformed holes (37) are arranged on the flange plate at equal intervals along the circumferential direction;
the top groove (4), the bottom groove (14), the inner cavity of the bottom groove (14), the crown body (30), the middle shaft (31) and the base (33) are all cylindrical.
10. A bridge, characterized by, including girder (2), support bed stone (22) and the automatic high support of formula of oil pressure of any one of claims 1-9, girder (2) is located the top of support bed stone (22), the automatic high support of formula of oil pressure sets up girder (2) and is located between support bed stone (22), and the top of overhead tank (4) is connected with girder (2), and the bottom of kerve (14) is connected with support bed stone (22).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121997441.5U CN215668985U (en) | 2021-08-23 | 2021-08-23 | Oil pressure type automatic height-adjusting support and bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121997441.5U CN215668985U (en) | 2021-08-23 | 2021-08-23 | Oil pressure type automatic height-adjusting support and bridge |
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| CN215668985U true CN215668985U (en) | 2022-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922058A (en) * | 2022-07-04 | 2022-08-19 | 长沙理工大学 | Hydraulic support capable of achieving secondary accurate height adjustment |
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- 2021-08-23 CN CN202121997441.5U patent/CN215668985U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922058A (en) * | 2022-07-04 | 2022-08-19 | 长沙理工大学 | Hydraulic support capable of achieving secondary accurate height adjustment |
| CN114922058B (en) * | 2022-07-04 | 2024-01-12 | 长沙理工大学 | Hydraulic support capable of being secondarily and accurately heightened |
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