CN213571600U - Bridge underpins bearing structure - Google Patents
Bridge underpins bearing structure Download PDFInfo
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- CN213571600U CN213571600U CN202022223127.3U CN202022223127U CN213571600U CN 213571600 U CN213571600 U CN 213571600U CN 202022223127 U CN202022223127 U CN 202022223127U CN 213571600 U CN213571600 U CN 213571600U
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Abstract
The utility model relates to a bridge underpins bearing structure, include: the extension cushion cap of being connected with former cushion cap planting muscle, set up a plurality of transverse arrangement stand steel-pipe piles on the extension cushion cap, and locate the load-bearing device at a plurality of stand steel-pipe pile tops, be equipped with a plurality of bearing structures between stand steel-pipe pile and the former pier stud, load-bearing device is including setting up in the horizontal spandrel girder at stand steel-pipe pile top, connect through bracing and antithetical couplet between the stand steel-pipe pile, the extension cushion cap is located the side of striding of the edge of former cushion cap in the same direction as the bridge. The steel bar is planted on the bearing platform of the original bridge pier and the pouring of the extension bearing platform is carried out, the stress area of the original bearing platform is increased, the stability of the underpinning supporting structure is guaranteed, the pile foundation does not need to be dug again, the distance between the underpinning supporting structure and the original bridge pier is short, the construction difficulty is reduced, meanwhile, a supporting structure is arranged between the original bridge pier and the underpinning supporting structure, and after the beam body falls on the underpinning supporting structure, the stability of the underpinning supporting structure is guaranteed.
Description
Technical Field
The utility model relates to a bridge building technical field, concretely relates to bridge underpins bearing structure.
Background
In the prior art, the pile foundation underpinning method utilizes the original bridge pier, forms a new stress system by constructing a new pile foundation, an underpinning bearing platform, a jack and an underpinning beam, and further implements the removal of the old pile foundation. The pile foundation underpinning method can also be used for underpinning the supporting structure on the bearing platform of the new bridge pier, if the pile foundation underpinning method is applied to renovating and transforming an old bridge, the underpinning supporting structure can be built only by utilizing more materials due to the fact that the built position of the new bridge pier is far away from the old bridge pier, the cost of the underpinning supporting structure is improved, and meanwhile, due to the fact that the far distance between the new bridge pier and the old bridge pier is large in construction difficulty of the underpinning supporting structure.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problems, in particular to the problems of great construction difficulty and high cost of underpinning and supporting structures in the renovation and transformation of old bridges, the following technical scheme is provided:
the embodiment of the application provides a bridge underpins bearing structure, includes: the steel pipe pile extension device comprises an extension bearing platform connected with an original bearing platform through embedded steel bars, a plurality of transversely arranged stand steel pipe piles arranged on the extension bearing platform, and a plurality of bearing devices arranged at the tops of the stand steel pipe piles, wherein a plurality of supporting structures are arranged between the stand steel pipe piles and the original pier stud, each bearing device comprises a transverse bearing beam arranged at the top of the stand steel pipe pile, the stand steel pipe piles are connected through inclined struts and parallel connection, and the extension bearing platform is located on the side of the original bearing platform along the bridge direction.
Optionally, the expansion bearing platform comprises a bearing part for supporting the upright steel pipe pile and a connecting part connected with the upright steel pipe pile, and the bearing part is arranged on the side surface of the original bearing platform in a clinging manner; the connecting part extends from the top surface of the expansion bearing platform to the top surface of the original bearing platform, so that the expansion bearing platform is flush with the top surface of the original bearing platform.
Optionally, the bearing part is connected with the original bearing platform steel bar planting, and the connecting part is connected with the original bearing platform top surface quincunx steel bar planting.
Optionally, the load bearing portion and the connecting portion are integrally connected.
Optionally, the diameter ratio of the planting depth of the quincunx planting bars to the diameter ratio of the steel bars is 15:1, and the distance between the planted steel bars is 50 cm.
Optionally, the support structure is fixedly connected with the original pier stud.
Optionally, an embedded part of an anchoring structure is arranged on the original pier stud, and the supporting structure is anchored on the original pier stud through the anchoring structure.
Optionally, the original pier stud comprises an anchoring layer poured on the side surface of the original pier stud, and the anchoring structure is arranged on the anchoring layer.
Optionally, the distance between the anchoring structures along the axis of the original pier is 1.5 m.
Optionally, the anchoring structure includes an anchor plate and an anchor bolt, and the anchor bolt is a chemical anchor bolt; the diameter of the anchor bolt is 20 mm.
Optionally, the diameter of the upright steel pipe column is 810 and 830mm, and the pipe wall thickness is 10 mm.
The embodiment of the application also provides a construction method of the bridge underpinning support structure, which comprises the following steps:
planting ribs on the original bearing platform structure, and pouring concrete to the planted ribs to obtain the expanded bearing platform;
arranging a plurality of upright steel pipe piles transversely on the bearing platform, connecting the upright steel pipe piles with original pier piles through supporting structures respectively, and connecting the upright steel pipe piles through parallel connection and inclined strut connection;
and a bearing device for supporting the beam body is arranged at the top of the upright post steel pipe pile.
Optionally, the planting the steel bar on the original bearing platform structure, and pouring concrete to the planted steel bar to obtain the extended bearing platform include:
planting steel bars in a quincunx shape on one side of the top surface of the original bearing platform, which is close to the stand column steel pipe pile, and on one side of the top surface of the original bearing platform, which is far away from the stand column steel pipe pile, and planting steel bars on the side surfaces of the original bearing platform and the stand column steel pipe pile, which are positioned on the same side;
and pouring concrete to the side planting bars and the top plum blossom-shaped planting bars to obtain the expansion bearing platform.
Optionally, the connecting the plurality of upright steel pipe piles with the original pier stud through a supporting structure respectively includes:
and arranging an embedded part on the original pier stud, connecting one end of the supporting structure with the embedded part through an anchoring structure, and connecting the other end of the supporting structure with the upright steel pipe.
Optionally, the method of setting an anchoring structure on the original pier stud includes:
and pouring an anchoring layer on the outer side surface of the original pier stud, and installing the anchoring structure on the anchoring layer.
Optionally, the bearing device for arranging the supporting beam body at the top of the upright steel pipe pile comprises:
the top of the upright post steel pipe is transversely provided with double-spliced I-shaped steel serving as a transverse bearing beam;
and a supporting device for supporting the beam body is arranged at the top of the bearing beam.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model provides a bridge underpins bearing structure, extension cushion cap and former cushion cap plant the muscle be connected, set up a plurality of transverse arrangement stand steel-pipe piles on the extension cushion cap to and the bearing device that stand steel-pipe pile top was equipped with, be equipped with a plurality of bearing structures between stand steel-pipe pile and the former pier stud, bearing device is including setting up in the horizontal spandrel girder at stand steel-pipe pile top, through bracing and antithetical couplet connection between the stand steel-pipe pile, the extension cushion cap is located former cushion cap along the side span side of bridge orientation. The steel bars are planted on the bearing platform of the original bridge pier and the casting of the extended bearing platform is carried out, so that the stress area of the original bearing platform is increased, the stability of the underpinning support structure is ensured, meanwhile, the pile foundation of the underpinning support structure does not need to be excavated, and the construction difficulty is reduced. The pouring of the bearing platform of the underpinning supporting structure and the installation of the steel pipe pile are carried out on the basis of the original bearing platform, so that the underpinning supporting structure is closer to the original pier, the construction difficulty is reduced, meanwhile, the supporting structure is arranged between the original pier and the underpinning supporting structure, and after the beam body falls on the underpinning supporting structure, the stability of the underpinning supporting structure is ensured.
According to the bridge underpinning support structure provided by the embodiment of the application, the expansion bearing platform comprises a bearing part for supporting the upright post steel pipe pile and a connecting part connected with the upright post steel pipe pile, and the bearing part is tightly attached to the side surface of the original bearing platform; the connecting part extends from the top surface of the expansion bearing platform to the top surface of the original bearing platform, so that the expansion bearing platform is flush with the top surface of the original bearing platform. The bearing part and the connecting part are integrally connected. Because the pile foundation is not pour to extension cushion cap below, and then when interim bearing structure supports the roof beam body, when the stable support stand steel-pipe pile, can also transmit power for former pier cushion cap through connecting portion, avoid the extension cushion cap to sink.
The embodiment of the application provides a bridge underpins bearing structure, is provided with the built-in fitting of anchor structure on former pier stud, and bearing structure passes through the anchor structure anchor on former pier stud. The original pier stud is provided with an anchoring layer poured on the side surface of the original pier stud, and the anchoring structure is arranged on the anchoring layer. The anchoring layer is arranged on the original pier stud, the anchoring structure is convenient to arrange, the supporting structure can be stably connected to the original pier stud, the damage to the original pier stud when the underpinning supporting structure is arranged is avoided, the stress area of the original pier stud is increased by the anchoring layer, and therefore more stable supporting force can be provided for the bridge, and the stability of the bridge is guaranteed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of the bridge underpinning support structure of the present invention;
FIG. 2 is a schematic structural view of the bridge underpinning support structure in the transverse direction of the bridge of the present invention;
fig. 3 is a schematic flow chart of the construction method of the bridge underpinning support structure of the utility model.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, but do not preclude the presence or addition of one or more other features, integers, steps, operations, and/or groups thereof.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The utility model provides a pair of bridge underpins bearing structure mainly is applied to the underpinning support of jacking back roof beam body, including being used for the roof beam body jacking back, the transformation process of supporting beam body structure on the transition mound places the roof beam body on the underpinning bearing structure. In the embodiment that the application provided, in order to overcome build new pile foundation and to establish the underpinning bearing structure on the basis of new pier and have the big problem of the construction degree of difficulty, the pile bar is planted and the pouring of extension cushion cap on the cushion cap of former pier, stand steel-pipe pile has increased bearing structure for underpinning bearing structure, and can transmit the power that underpins bearing structure and receive to the cushion cap on, the extension cushion cap has increased the lifting surface area of former cushion cap, has guaranteed underpinning bearing structure's stability. The pouring of the bearing platform of the underpinning supporting structure and the installation of the steel pipe pile are carried out on the basis of the original bearing platform, so that the underpinning supporting structure is closer to the original pier, the construction difficulty is reduced, meanwhile, the supporting structure is arranged between the original pier and the underpinning supporting structure, and after the beam body falls on the underpinning supporting structure, the stability of the underpinning supporting structure is ensured.
The bridge underpins bearing structure that this application embodiment provided, as shown in fig. 1 and fig. 2, includes: with 1 plant the extension cushion cap 2 that the muscle is connected of former cushion cap, set up a plurality of transverse arrangement stand steel-pipe pile 3 on extension cushion cap 2, and locate the bearing device 4 at 3 tops of a plurality of stand steel-pipe piles, be equipped with a plurality of bearing structure 6 between stand steel-pipe pile 3 and former pier stud 5, bearing device 4 is including setting up in the horizontal spandrel girder 41 at 3 tops of stand steel-pipe pile, connect through bracing and antithetical couplet between the stand steel-pipe pile 3, extension cushion cap 2 is located the side of striding of 1 following the bridge of former cushion cap, and this side strides the side and dismantles and need the one side of rebuilding for former roof beam body bent cap, perhaps widen the side at bridge floor place on former roof beam body basis. Former cushion cap 1 and extension cushion cap 2 bar planting are connected, have increased extension cushion cap 2 rigidity, can be connected extension cushion cap 2 with former cushion cap firmly simultaneously, and the condition that subsides can not appear in extension cushion cap 2 when stand steel-pipe pile 3 transmits the power that receives for extension cushion cap 2. A plurality of stand steel-pipe piles 3 transverse arrangement are in former pier stud 5 one side to set up on extension cushion cap 2, carry out the dismantlement and the reconstruction in-process of bent cap 7 on the pier that transition, can provide the holding power for the roof beam body 8, so that underpin bearing and changing bearing structure can undertake former bent cap 7's effect, and a plurality of stand steel-pipe piles 3 can support the roof beam body 8 more steadily.
As shown in fig. 1, in order to support the beam body by the column steel-pipe piles 3 so that the beam body 8 can smoothly transmit force to the column steel-pipe piles 3, a load bearing device 4 is provided on the top of the column steel-pipe piles 3, and a transverse load bearing beam 41 in the load bearing device 4 can evenly distribute the force transmitted by the beam body 8 to each column steel-pipe pile 3. In order to guarantee that the underpinning supporting structure has better stability, a supporting structure 6 is arranged between an original pier column 5 and an upright post steel pipe pile 3, two ends of the supporting structure 6 are respectively connected with the original pier column 5 and the upright post steel pipe pile 3, and when the upright post steel pipe pile 3 is subjected to the force transmitted by a beam body 8, the phenomenon of overturning or shaking cannot occur. Bracing 9 and parallel connection between stand steel-pipe pile 3 construct stand steel-pipe pile 3 into whole, have increased stand steel-pipe pile 3's stability. Optionally, the support structure 6 is a 25 channel steel. The transverse bearing beam 41 is double-spliced 45I-shaped steel, the diameter of the upright steel pipe column is 810-830mm, and the thickness of the upright steel pipe column is 10 mm. Optionally, the specification of the upright steel pipe pile 3 is phi 820 x 10 mm.
In the embodiment provided by the present application, as shown in fig. 2, the transverse main bearing beam in the transverse bearing beam 41 is formed by splicing 45 i-beams, that is, the transverse main bearing beam is formed by splicing flanges of two i-beams, and the transverse main bearing beam is further provided with a jack 42 and a steel support pad 43 for supporting the beam body 8, and the arrangement of the jack and the steel support pad is the same as that of the original cover beam. And the diagonal braces 9 and the parallel connection between the upright post steel pipe piles 3 are made of 20a channel steel.
In the embodiment that this application provided, because the extension cushion cap provides the supporting role for stand steel-pipe pile, avoid stand steel-pipe pile to appear sunken phenomenon when the atress. Optionally, as shown in fig. 1, the expanded bearing platform 2 includes a bearing part 21 for supporting the upright steel pipe pile 3 and a connecting part 22 connected to the upright steel pipe pile 3, the bearing part 21 is closely attached to the side surface of the original bearing platform 1, and the bearing part 21 is mainly used for bearing the force transmitted by the upright steel pipe pile 3, so as to increase the stability of the upright steel pipe pile 3; the connecting part 22 extends from the top surface of the expansion bearing platform 2 to the top surface of the original bearing platform 1, namely from the top surface of the bearing part to the top surface of the original bearing platform 1, so that the expansion bearing platform 2 is flush with the top surface of the original bearing platform 1.
As shown in FIG. 1, when the extension bearing platform 2 is stressed, the connecting portion 22 can transmit part of the stress to the original bearing platform 1, and meanwhile, the extension bearing platform 2 is clamped on the top surface of the original bearing platform through the connecting portion, so that the phenomenon of settlement when the extension bearing platform 2 is stressed is avoided. Optionally, the bearing part 21 and the connecting part 22 are integrally connected, that is, when the expansion bearing platform 2 is cast, the bearing part 21 and the connecting part 22 are cast at the same time, when the expansion bearing platform 2 is stressed, the bearing part 21 and the connecting part 22 are not separated, and the vertical position of the expansion bearing platform 2 is not changed when the expansion bearing platform is stressed. In the embodiment provided by the application, the length of the bearing part is consistent with the height of the original bearing platform, and the width of the bearing part is 150 cm. In the embodiment that this application provided, connecting portion pour on the whole top surface of former cushion cap, and one side that former cushion cap top surface is close to the stand steel pipe all is provided with the quincunx bar planting with the one side of keeping away from the stand steel pipe, and the thickness of connecting portion is 30cm, and the length of connecting portion is unanimous with the length of former cushion cap, and the width of the connecting portion that is located on former cushion cap is 25cm, and keeps away from stand steel-pipe pile at former cushion cap top surface one side width equally and is 25 cm. The connecting part is poured on the whole top surface of the original bearing platform, so that the expanded bearing platform and the original bearing platform can be balanced in stress, and the phenomenon that one side of the bearing platform is inclined due to uneven stress is avoided.
Optionally, in an embodiment provided by the present application, as shown in fig. 1, in order to make the extension platform 2 stable and rigid when subjected to a force. The bearing part 21 is connected with the embedded steel bar of the original bearing platform 1, wherein the shear steel bar adopted by the embedded steel bar reinforces the connection performance of the extension bearing platform 2 and the original bearing platform 1, reduces the descending probability of the extension bearing platform 2, the connecting part 22 is connected with the embedded steel bar of the quincunx shape on the top surface of the original bearing platform 1, increases the shearing force between the connecting part 22 and the original bearing platform 1, and ensures the position of the extension bearing platform 2 in the vertical direction when stressed. Optionally, the ratio of the planting depth of the quincunx planting bars to the diameter of the steel bars is 15:1, the distance between the planted steel bars is 50cm, and the diameter of the steel bars of the quincunx planting bars is 20 mm.
In the embodiment provided by the application, because the old bridge renovates the in-process and can involve the widening of bridge floor, the expansion cushion cap has increased the cross-section of former cushion cap, and then has promoted the solid of bridge renovation back transition mound and has weighed firmly, has improved the stability of bridge.
Alternatively, in the embodiment provided by the present application, as shown in fig. 1, in order to ensure that the support structure 6 can stably support the upright steel-pipe pile 3, so as to ensure the stability of the upright steel-pipe pile 3, the support structure 6 is fixedly connected to the original pier column 5. Optionally, an embedded part of the anchoring structure 10 is arranged on the original pier stud 5, and the anchoring structure 10 through which the supporting structure 6 passes is anchored on the original pier stud 5. Optionally, the original pier stud 5 comprises an anchoring layer 51 poured on the side surface of the original pier stud 5, the anchoring structure 10 is arranged on the anchoring layer 51, more specifically, the embedded part is embedded in the anchoring layer, and the anchoring structure is connected with the embedded part for installation. Through setting up anchoring layer 51, avoid for fixed stay structure 6, and cause the destruction to former pier stud 5 structure, guaranteed former pier stud 5's atress performance, anchoring layer 51 has increased former pier stud 5's cross-sectional area simultaneously, stability when having improved former pier stud 5 support beam body 8. In the embodiment provided by the present application, optionally, the distance between the anchoring structures 10 and the original pier stud 5 along the axis direction is 1.5m, so the distance between the supporting structures and the original pier stud 5 along the axis direction is also 1.5m, and the supporting performance of the supporting structures on the steel pipe pile 3 of the upright post is ensured. Optionally, the anchoring structure comprises an anchor plate and an anchor bolt, wherein the anchor bolt is a chemical anchor bolt; the diameter of the anchor bolt is 20 mm.
The embodiment of the present application further provides a construction method for a bridge underpinning support structure, as shown in fig. 3, including: s10, S20 and S30.
S10: and (4) planting ribs on the original bearing platform structure, and pouring concrete into the planted ribs to obtain the expanded bearing platform.
Optionally, the bar planting on former cushion cap structure, to the bar planting concreting obtain extension cushion cap, include:
planting steel bars in a quincunx shape on one side of the top surface of the original bearing platform, which is close to the upright post steel pipe pile, and on one side of the top surface of the original bearing platform, which is far away from the upright post steel pipe pile, and planting steel bars on the side surface of the original bearing platform, which is positioned on the same side as the upright post steel pipe pile;
and (5) pouring concrete to the side planting bars and the top plum blossom-shaped planting bars to obtain the expanded bearing platform.
In the embodiment that the application provided, in order to be connected former cushion cap and extension cushion cap, and guarantee to provide when supporting at the extension cushion cap for stand steel-pipe pile, stand steel-pipe pile can not appear sinking when the atress, guarantee the steadiness that extension cushion cap and former cushion cap are connected, and guarantee the stress balance of former pier, carry out quincunx planting bar at former cushion cap top surface, quincunx planting bar is located one side that former cushion cap top surface is close to stand steel-pipe pile one side and keeps away from stand steel-pipe pile, and plant the shear reinforcement at the side that is located the homonymy side of former cushion cap and stand steel-pipe pile. And then pouring concrete to the shear steel bars and the quincunx planting bars on the side surface to obtain the expansion bearing platform. Wherein the concrete poured on the top surface of the original bearing platform covers the top surface of the whole bearing platform, and is simultaneously poured together with the concrete on the side surface of the expanded bearing platform so as to ensure the integrity of the whole structure of the expanded bearing platform.
S20: a plurality of stand steel pipe piles are transversely arranged on the bearing platform, are connected with the original pier stud through supporting structures respectively, and are connected through parallel connection and inclined strut connection.
Optionally, be connected a plurality of stand steel-pipe piles with former pier stud through bearing structure respectively, include:
an embedded part is arranged on an original pier stud, one end of a supporting structure is connected with the embedded part through an anchoring structure, and the other end of the supporting structure is connected with an upright post steel pipe.
Optionally, an anchoring structure is provided on the original pier stud, comprising:
and (4) pouring an anchoring layer on the outer side surface of the original pier stud, and installing the anchoring structure on the anchoring layer.
In the embodiment provided by the application, after the expansion bearing platform is poured and reaches the preset strength, the upright steel pipe pile is arranged on the expansion bearing platform. In order to ensure that the stand column steel pipe pile cannot incline or topple over when stressed, an anchoring structure is arranged on an original pier stud, one end of a supporting structure is connected with the stand column steel pipe pile, the other end of the supporting structure is connected with the anchoring structure on the original pier stud, and in order to ensure the stability of the supporting structure after anchoring, an embedded part for installing and connecting the anchoring structure is arranged on the original pier stud, wherein when the anchoring layer is poured, the embedded part is embedded in the anchoring layer. Wherein same stand steel-pipe pile need set up a plurality of bearing structure, and corresponding also has a plurality of anchor structures, and each anchor structure is 1.5m along former pier stud axial interval. The anchor structure includes anchor slab and crab-bolt, and the crab-bolt is the chemistry crab-bolt, and the diameter of crab-bolt is 20 mm. In order not to cause the harm to former pier stud structure and surface when connecting bearing structure, pour one deck anchor layer at former pier stud lateral surface (outer peripheral face), with anchor fixed mounting on anchor layer, this anchor layer has still increased the cross-sectional area of former pier stud, and then has increased the stability when former pier stud atress.
S30: and the top of the upright steel pipe pile is provided with a bearing device for supporting the beam body.
Optionally, set up the load-bearing device who supports the roof beam body at stand steel-pipe pile top includes:
the top of the upright post steel pipe is transversely provided with double-spliced I-shaped steel serving as a transverse bearing beam;
and a supporting device for supporting the beam body is arranged at the top of the bearing beam.
In the embodiment that the application provided, in order to realize the supporting role to the roof beam body, be provided with load-bearing device at stand steel pipe top, load-bearing device is including setting up in the 45I-steel of the double pin at stand steel-pipe pile top to and set up in the strutting arrangement of the supporting beam body at I-steel top, and strutting arrangement includes jack and steel support pad, in order to realize the adjustment to the bridge line type, and underpin the supporting role that bearing structure is the bridge roof beam body.
In conclusion, the bridge underpins bearing structure that this application provided includes following beneficial effect:
the utility model provides a bridge underpins bearing structure, extension cushion cap and former cushion cap plant the muscle be connected, set up a plurality of transverse arrangement stand steel-pipe piles on the extension cushion cap to and the bearing device that stand steel-pipe pile top was equipped with, be equipped with a plurality of bearing structures between stand steel-pipe pile and the former pier stud, bearing device is including setting up in the horizontal spandrel girder at stand steel-pipe pile top, through bracing and antithetical couplet connection between the stand steel-pipe pile, the extension cushion cap is located former cushion cap along the side span side of bridge orientation. The steel bars are planted on the bearing platform of the original bridge pier and the casting of the extended bearing platform is carried out, so that the stress area of the original bearing platform is increased, the stability of the underpinning support structure is ensured, meanwhile, the pile foundation of the underpinning support structure does not need to be excavated, and the construction difficulty is reduced. The pouring of the bearing platform of the underpinning supporting structure and the installation of the steel pipe pile are carried out on the basis of the original bearing platform, so that the underpinning supporting structure is closer to the original pier, the construction difficulty is reduced, meanwhile, the supporting structure is arranged between the original pier and the underpinning supporting structure, and after the beam body falls on the underpinning supporting structure, the stability of the underpinning supporting structure is ensured.
According to the bridge underpinning support structure provided by the embodiment of the application, the expansion bearing platform comprises a bearing part for supporting the upright post steel pipe pile and a connecting part connected with the upright post steel pipe pile, and the bearing part is tightly attached to the side surface of the original bearing platform; the connecting part extends from the top surface of the expansion bearing platform to the top surface of the original bearing platform, so that the expansion bearing platform is flush with the top surface of the original bearing platform. The bearing part and the connecting part are integrally connected. Because the pile foundation is not pour to extension cushion cap below, and then when interim bearing structure supports the roof beam body, when the stable support stand steel-pipe pile, can also transmit power for former pier cushion cap through connecting portion, avoid the extension cushion cap to sink.
The embodiment of the application provides a bridge underpins bearing structure, is provided with the built-in fitting of anchor structure on former pier stud, and bearing structure passes through the anchor structure anchor on former pier stud. The original pier stud is provided with an anchoring layer poured on the side surface of the original pier stud, and the anchoring structure is arranged on the anchoring layer. The anchoring layer is arranged on the original pier stud, the anchoring structure is convenient to arrange, the supporting structure can be stably connected to the original pier stud, the damage to the original pier stud when the underpinning supporting structure is arranged is avoided, the stress area of the original pier stud is increased by the anchoring layer, and therefore more stable supporting force can be provided for the bridge, and the stability of the bridge is guaranteed.
The above are only some embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A bridge underpinning support structure, comprising: the steel pipe pile extension device comprises an extension bearing platform connected with an original bearing platform through embedded steel bars, a plurality of transversely arranged stand steel pipe piles arranged on the extension bearing platform, and a plurality of bearing devices arranged at the tops of the stand steel pipe piles, wherein a plurality of supporting structures are arranged between the stand steel pipe piles and the original pier stud, each bearing device comprises a transverse bearing beam arranged at the top of the stand steel pipe pile, the stand steel pipe piles are connected through inclined struts and parallel connection, and the extension bearing platform is located on the side of the original bearing platform along the bridge direction.
2. The bridge underpinning support structure of claim 1, wherein the expansion bearing platform comprises a bearing part for supporting the upright steel pipe pile and a connecting part connected with the upright steel pipe pile, and the bearing part is arranged on the side surface of the original bearing platform in a clinging manner; the connecting part extends from the top surface of the expansion bearing platform to the top surface of the original bearing platform, so that the expansion bearing platform is flush with the top surface of the original bearing platform.
3. The bridge underpinning support structure of claim 2, wherein said bearing part is connected with said original bearing platform planting bar, and said connecting part is connected with said original bearing platform top surface quincunx planting bar.
4. The bridge underpinning support structure of claim 2, wherein said load bearing portion and said connecting portion are integrally connected.
5. The bridge underpinning support structure of claim 3, wherein the diameter ratio of the planting depth of the quincunx planting bars to the steel bars is 15:1, and the distance between the planting bars is 50 cm.
6. The bridge underpinning support structure of claim 1, wherein said support structure is fixedly connected to said original pier stud.
7. The bridge underpinning support structure of claim 6, wherein the original pier stud is provided with an embedded part of an anchoring structure, and the support structure is anchored on the original pier stud through the anchoring structure.
8. The bridge underpinning support structure of claim 7, wherein said original pier stud includes an anchoring layer cast on the side of said original pier stud, said anchoring structure being disposed on said anchoring layer.
9. The bridge underpinning support structure of claim 8, wherein the distance between said anchoring structures along the axis of said original pier is 1.5 m.
10. The bridge underpinning support structure of claim 8, wherein said anchoring structure comprises an anchor plate and an anchor bolt, said anchor bolt being a chemical anchor bolt; the diameter of the anchor bolt is 20 mm.
11. The bridge underpinning support structure of claim 1, wherein the diameter of the upright steel pipe column is 810 and 830mm, and the thickness of the pipe wall is 10 mm.
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| CN202022223127.3U CN213571600U (en) | 2020-09-30 | 2020-09-30 | Bridge underpins bearing structure |
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| CN202022223127.3U CN213571600U (en) | 2020-09-30 | 2020-09-30 | Bridge underpins bearing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737667A (en) * | 2021-11-04 | 2021-12-03 | 上海建工五建集团有限公司 | Bridge reinforcing system and dynamic reinforcing method |
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2020
- 2020-09-30 CN CN202022223127.3U patent/CN213571600U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737667A (en) * | 2021-11-04 | 2021-12-03 | 上海建工五建集团有限公司 | Bridge reinforcing system and dynamic reinforcing method |
| WO2023077723A1 (en) * | 2021-11-04 | 2023-05-11 | 上海建工五建集团有限公司 | Bridge reinforcement system and dynamic reinforcement method |
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