Anti-empty bearings and bridges

Abstract

This invention discloses an anti-voiding bearing and bridge, relating to the field of bridge engineering technology. The anti-voiding bearing includes an interconnected bearing body and a base. The top of the bearing body is used to connect with the beam, and the base is located at the bottom of the bearing body. The bottom surface of the base is a casting surface, and a drainage protrusion is provided on the casting surface. The top surface of the drainage protrusion is an outwardly convex arc shape extending to the casting surface. The drainage protrusion is used to be installed within a template and is positioned opposite the bottom wall of the template to cooperate with the template for grouting operations, thereby fixing the base to the bridge pier. This anti-voiding bearing and bridge can effectively expel gas and water trapped between the bearing and the bridge pier during grouting operations, thus reducing the probability of voids due to insufficient grout filling of the space.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to an anti-slip bearing and a bridge. Background Art

[0002] Bridge bearings are force transmission devices at the supports of bridge span structures and piers or abutments. Bearings not only bear and transmit large loads, but also ensure that the bridge span structure can produce certain displacements, have reasonable force transmission methods, and do not produce stress concentration. During the installation of the bridge, the main beam and the bearing, the piers or abutments and the bearings should be in close contact and must not be empty. However, due to various reasons such as construction, the phenomenon of bearing emptying often occurs. In the quality inspections of many domestic roads and bridges, there are problems of bearing emptying and displacement, and some of the emptying problems are quite serious. Bearing emptying is a very serious problem in bridge construction. Bearing emptying leads to increased local pressure. Under repeated loads, the main beam will vibrate, which affects the performance of the bridge. At the same time, it will reduce the stability of the main beam, reduce the service life of the bearing, and even damage the main beam.

[0003] In view of this, it is particularly important to develop and design an anti-slip bearing and bridge that can solve the above-mentioned technical problems. Summary of the invention

[0004] The object of the present invention is to provide an anti-emptying bearing, which can better discharge the gas and water retained between the bearing and the pier during grouting operation, thereby reducing the probability of emptying caused by the inability of slurry to fill the space.

[0005] Another object of the present invention is to provide a bridge that can also better discharge gas and water retained between the support and the pier during grouting operations, thereby reducing the probability of void problems due to the inability of slurry to fill the space.

[0006] The present invention provides a technical solution:

[0007] In the first aspect, an embodiment of the present invention provides an anti-emptying bearing, comprising a bearing body and a base connected to each other, wherein the top of the bearing body is used to connect with the beam body, the base is located at the bottom of the bearing body, and the bottom surface of the base is a casting surface; the casting surface is convexly provided with a drainage-aiding protrusion, and the top surface of the drainage-aiding protrusion is arranged in an outwardly convex arc shape and extends to the casting surface; the drainage-aiding protrusion is used to be arranged in a formwork and is used to be opposite to the bottom wall of the formwork, so as to cooperate with the formwork to carry out grouting operations, thereby fixing the base to the pier.

[0008] In combination with the first aspect, in a first implementation of the first aspect, the casting surface is provided with exhaust grooves, and the exhaust grooves extend in a straight line from the edge of the exhaust-aiding protrusion to the edge of the casting surface.

[0009] In combination with the first aspect and the above-mentioned implementation manner, in a second implementation manner of the first aspect, the number of the exhaust grooves is multiple, and the multiple exhaust grooves are arranged along the circumferential direction of the exhaust-aiding protrusion.

[0010] In combination with the first aspect and the above-mentioned implementation manner, in a third implementation manner of the first aspect, an exhaust hole is further provided on the base, and the exhaust hole penetrates the base and extends to the side surface or top surface of the base.

[0011] In combination with the first aspect and the above-mentioned implementation manner, in a fourth implementation manner of the first aspect, the number of the exhaust holes is multiple, and the openings of the exhaust holes located on the casting surface are located between adjacent exhaust grooves.

[0012] In combination with the first aspect and the above-mentioned implementation manner, in a fifth implementation manner of the first aspect, the opening of the exhaust hole located on the casting surface is located on the edge of the drainage-aiding protrusion.

[0013] In combination with the first aspect and the above-mentioned implementation manners, in a sixth implementation manner of the first aspect, the top surface of the drainage-aiding protrusion is covered with a water-absorbent and serous membrane.

[0014] In combination with the first aspect and the above-mentioned implementation manners, in a seventh implementation manner of the first aspect, the edge of the water-absorbent and serous membrane is located at one end of the exhaust groove close to the edge of the exhaust-aiding protrusion.

[0015] In combination with the first aspect and its above-mentioned implementation manner, in an eighth implementation manner of the first aspect, the casting surface is also fixed with an anchor bolt, the base is fixed to the top surface of the pier through the anchor bolt, and one end of the anchor bolt is located on the casting surface and is located on the top surface of the drainage aid protrusion.

[0016] In a second aspect, an embodiment of the present invention further provides a bridge, comprising a beam body, a pier and the anti-emptying support, wherein the anti-emptying support comprises a support body and a base connected to each other, wherein the base is located at the bottom of the support body, and the bottom surface of the base is a casting surface; the casting surface is provided with a drainage-aiding protrusion, and the top surface of the drainage-aiding protrusion is arranged in an outwardly convex arc shape and extends to the casting surface; the drainage-aiding protrusion is used to be arranged in a template and is used to be opposite to the bottom wall of the template to cooperate with the template for grouting operations, thereby fixing the base to the pier. The top of the support body is connected to the beam body.

[0017] Compared with the prior art, the anti-emptying support provided by the embodiment of the present invention has the following beneficial effects over the prior art:

[0018] The anti-emptying support includes a support body and a base that are connected to each other. The top of the support body is used to connect with the beam body. The base is located at the bottom of the support body, and the bottom surface of the base is a casting surface. A drainage protrusion is convexly provided on the casting surface. The top surface of the drainage protrusion is in an outwardly convex arc shape, and the top surface of the drainage protrusion extends to the casting surface. In this way, when grouting is performed, the slurry in the template gradually expands from the top center of the drainage protrusion to the top center of the drainage protrusion and the edge of the casting surface, so that bubbles and water are not easily retained near the drainage protrusion, so as to reduce the probability of gas and water being retained between the anti-emptying support and the bridge pier during the grouting operation, and reduce the probability of emptying due to the inability of the slurry to fill the space.

[0019] The beneficial effects of the bridge provided by the embodiment of the present invention relative to the prior art are the same as the beneficial effects of the above-mentioned anti-emptying bearing relative to the prior art, which will not be repeated here.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic structural diagram of an anti-slip support provided in an embodiment of the present invention.

[0023] Figure 2 A schematic structural diagram of an anti-slip support provided in an embodiment of the present invention when viewed from an upward perspective.

[0024] Figure 3 A schematic structural diagram of the anti-emptying support and the steel membrane provided in an embodiment of the present invention when in cooperation.

[0025] Icons: 10-anti-slip bearing; 11-bearing body; 13-base; 131-casting surface; 132-drainage-aiding protrusion; 133-exhaust groove; 134-exhaust hole; 135-anchor bolt; 15-water-absorbent and permeable slurry membrane; 910-formwork; 920-slurry; 930-rubber anti-leakage strip; 950-expansion bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. The orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship usually placed when the invention product is used, or the orientation or position relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. Without more constraints, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

[0028] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Example:

[0031] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic structural diagram of an anti-emptying support 10 provided in an embodiment of the present invention. Figure 2A schematic structural diagram of the anti-emptying support 10 provided in an embodiment of the present invention when viewed from an upward perspective. Figure 3 A schematic structural diagram of the anti-emptying support 10 provided in an embodiment of the present invention when in cooperation with a steel membrane.

[0032] The embodiment of the present invention provides an anti-empty bearing 10, which can effectively discharge the gas and water retained between the bearing and the bridge pier during the grouting operation, thereby reducing the probability of the emptying problem due to the inability of the slurry 920 to fill the space. The anti-empty bearing 10 can be applied to various types of bridges.

[0033] After the anti-airdrop bearing 10 is installed on the bridge, the top of the anti-airdrop bearing 10 is connected to the beam of the bridge, and the bottom of the anti-airdrop bearing 10 is poured and grouting is completed in cooperation with the formwork 910, thereby fixing the anti-airdrop bearing 10 to the pier of the bridge.

[0034] Since the bridge adopts the anti-emptying bearing 10 provided by the embodiment of the present invention, the bridge can also better discharge the gas and water retained between the bearing and the pier during the grouting operation, thereby reducing the probability of emptying caused by the slurry 920 failing to fill the space.

[0035] The structural composition, working principle and beneficial effects of the anti-emptying support 10 provided in an embodiment of the present invention will be specifically introduced below.

[0036] The anti-emptying support 10 includes a support body 11 and a base 13 connected to each other. The top of the support body 11 is used to connect with the beam body. The base 13 is located at the bottom of the support body 11, and the bottom surface of the base 13 is a casting surface 131. A drainage-aiding protrusion 132 is convexly provided on the casting surface 131. The top surface of the drainage-aiding protrusion 132 is arranged in an outwardly convex arc shape, and the top surface of the drainage-aiding protrusion 132 extends to the casting surface 131. In other words, the drainage-aiding protrusion 132 protrudes downward from the casting surface 131, and the distance from the center of the top surface of the drainage-aiding protrusion 132 to the edge of the top surface gradually decreases to zero. The drainage-aiding protrusion 132 is used to be arranged in the template 910, and the top surface of the drainage-aiding protrusion 132 is used to be opposite to the bottom wall of the template 910, so that the casting surface 131 and the template 910 cooperate to perform grouting operations, thereby fixing the base 13 to the bridge pier.

[0037] In this way, when the grouting operation is carried out, the slurry 920 in the template 910 gradually expands from the top surface center of the drainage protrusion 132 to the top surface center of the drainage protrusion 132 and the edge of the casting surface 131 in sequence, so that bubbles and water are not easily retained near the drainage protrusion 132, thereby reducing the probability of gas and water being retained between the anti-emptying bearing 10 and the bridge pier during the grouting operation, and reducing the probability of emptying problems due to the inability of the slurry 920 to fill the space.

[0038] Furthermore, an exhaust groove 133 may be opened on the casting surface 131, and the exhaust groove 133 extends in a straight line from the edge of the drainage protrusion 132 to the edge of the casting surface 131. In this way, the gas and water remaining between the casting surface 131 and the template 910 can be discharged from the edge of the drainage protrusion 132 to the edge of the casting surface 131 through the exhaust groove 133, further reducing the probability of gas and water remaining between the anti-emptying bearing 10 and the bridge pier during the grouting operation.

[0039] Furthermore, there may be a plurality of exhaust grooves 133 , and the plurality of exhaust grooves 133 are arranged along the circumferential direction of the exhaust-assisting protrusion 132 , so as to further increase the efficiency of exhausting gas and water from the exhaust grooves 133 .

[0040] It should be noted that in this embodiment, the number of the exhaust grooves 133 is six, and the included angle of the exhaust grooves 133 on both sides of three adjacent exhaust grooves 133 is 90°, so as to more evenly exhaust gas and water from the edge of the exhaust-aiding protrusion 132 to the edge of the casting surface 131.

[0041] Furthermore, an exhaust hole 134 may be provided on the base 13 , and the exhaust hole 134 is provided through the base 13 and extends to the top surface of the base 13 , so that residual gas and water can be discharged through the exhaust hole 134 , so as to further improve the efficiency of exhausting gas and water.

[0042] It should be noted that, in the present embodiment, the diameter of the cross section of the base 13 is larger than the diameter of the cross section of the support body 11, and the exhaust hole 134 is vertically arranged to vertically discharge the gas under the casting surface 131 to the top of the base 13, while in other embodiments, the exhaust hole 134 may also pass through the casting surface 131 and the side of the base 13 to laterally discharge the gas and water under the casting surface 131.

[0043] Furthermore, there may be a plurality of exhaust holes 134 , and the openings of the exhaust holes 134 located on the casting surface 131 are located between adjacent exhaust grooves 133 , so that the exhaust holes 134 and the exhaust grooves 133 can exhaust gas and water uniformly together.

[0044] It should be noted that, in the present embodiment, the opening of the exhaust hole 134 located on the casting surface 131 is located at the edge of the exhaust protrusion 132. In this way, while the slurry 920 expands to the edge of the exhaust protrusion 132 in sequence, the gas near the top surface of the exhaust protrusion 132 moves toward the edge of the exhaust protrusion 132 at the same time. When part of the gas moves to the edge of the exhaust protrusion 132, it will be discharged through the exhaust hole 134, thereby improving the overall permeability of the gas in the exhaust groove 133 and the exhaust hole 134, so as to further avoid residual gas from staying at the edge of the exhaust protrusion 132.

[0045] Furthermore, the top surface of the drainage protrusion 132 can also be covered with a water-absorbent and permeable membrane 15. When water accumulates at the bottom of the casting surface 131, it is not easy to discharge through the exhaust groove 133 and the exhaust hole 134. The water-absorbent and permeable membrane 15 can absorb excess water to ensure that the grouting material 920 fully fills the space below the casting surface 131, avoiding the problem of emptying caused by the slurry 920 being unable to reach the bottom.

[0046] Furthermore, the edge of the water-absorbent permeable membrane 15 can be located at one end of the venting groove 133 close to the edge of the drainage-aiding protrusion 132. In this way, the water-absorbent permeable membrane 15 completely covers the drainage-aiding protrusion 132, thereby improving the ability of the water-absorbent permeable membrane 15 to absorb excess water and reducing the probability of excess water entering the venting groove 133 after the slurry 920 successively expands to the edge of the drainage-aiding protrusion 132, thereby further reducing the accumulation of water in the venting groove 133.

[0047] It should be noted that the thickness of the water-absorbent permeable membrane 15 is not more than 2 mm, and the thickness of the water-absorbent permeable membrane 15 is preferably below 2 mm to avoid the water-absorbent permeable membrane 15 being too thick, which may cause compression deformation after the anti-airdrop bearing 10 is under pressure, thereby reducing the elevation of the anti-airdrop bearing 10 and affecting the operation of the bridge.

[0048] Furthermore, the casting surface 131 may be fixedly provided with an anchor bolt 135, and the base 13 is fixed to the top surface of the pier through the anchor bolt 135, and one end of the anchor bolt 135 located on the casting surface 131 is located on the top surface of the drainage protrusion 132 to avoid the possibility of excess water and gas staying at the root of the anchor bolt 135.

[0049] It should be noted that a gap of 20 to 30 mm may be left between the casting surface 131 and the top surface of the pier to facilitate pouring of the non-shrinkage high-strength pouring slurry 920 .

[0050] In addition, a rubber leak-proof strip 930 may be fixed at the bottom of the template 910, and the thickness of the rubber leak-proof strip 930 is not more than 4 mm to prevent grout leakage from the bottom. The distance between the inner wall of the template 910 and the side of the base 13 is not more than 50 mm and not less than 30 mm to ensure grouting space. The template 910 may also be a steel template or a prefabricated template 910.

[0051] The installation prefabrication process of the anti-empty support 10 provided in this embodiment is roughly as follows:

[0052] Step 1: Before the beam is hoisted, the anti-slip support 10 is first installed at the bottom of the beam. An upper support plate (not shown) can also be provided on the top of the support body 11, and ensure that there is no gap between it and the embedded steel plate at the bottom of the beam.

[0053] Step 2: On the top surface of the pier, remove the debris in the reserved anchor bolt 135 hole (not shown), install the grouting template 910, and soak the top surface of the pier with water. A 4mm thick rubber leak-proof strip 930 is set on the bottom surface of the template 910 and fixed to the top surface of the pier by expansion bolts 950.

[0054] Step three, hoist the beam body and place it on temporary supporting jacks. Use the jacks to adjust the beam body position and elevation. The reaction force of each jack shall not exceed 5% of the average value. After the anti-void bearing 10 is in place, leave a gap of 20 to 30 mm between the casting surface 131 and the top surface of the pier to facilitate the pouring of non-shrinkage high-strength pouring slurry 920.

[0055] Step 4: Grouting is done by gravity grouting. Grout the gaps at the bottom of the base 13 and the anchor bolt 135 holes. Estimate the grout volume, prepare enough materials, fill it up at one time, and the grouting port should not be lower than the top surface of the beam. The actual grouting volume should not have too large an error with the calculated value to prevent grout shortage in the middle.

[0056] Step 5: The grouting process should be carried out from the center of the bottom of the base 13 to the surrounding areas until the gap between the template 910 and the surrounding area of ​​the base 13 is completely filled with grouting materials.

[0057] Step 6: After the strength reaches 20 MPa, remove the template 910, tighten the anchor bolts 135 on the base 13, remove the upper and lower connecting steel plates and bolts of the anti-empty support 10, remove the temporary jack, and install the enclosure of the anti-empty support 10. Thus, the installation of the anti-empty support 10 and its connection and fixation with the top surface of the pier are completed.

[0058] The working principle of the anti-empty support 10 provided in the embodiment of the present invention is:

[0059] When the anti-emptying support 10 is used in conjunction with the formwork 910 for grouting, the center of the top surface of the drainage-aiding protrusion 132 is first filled with the slurry 920, and the slurry 920 is sequentially expanded to the edge of the drainage-aiding protrusion 132 and the edge of the casting surface 131. At the same time, the gas and water move along the arc edge of the top surface of the drainage-aiding protrusion 132, and part of the gas and water are discharged through the exhaust hole 134, while the remaining residual gas and water can continue to be discharged from the exhaust groove 133 to the edge of the casting surface 131, ensuring that there will be no air holding and water accumulation at the bottom of the base 13. The water-absorbing and permeable membrane 15 covering the bottom surface of the base 13 also absorbs the accumulated water at the bottom of the base 13, further ensuring that the grouting material 920 is fully filled and avoiding the emptying problem caused by the inability of the slurry 920 to reach.

[0060] In summary:

[0061] The embodiment of the present invention provides an anti-emptying bearing 10, which can effectively discharge gas and water retained between the bearing and the pier during grouting operation, thereby reducing the probability of emptying caused by the slurry 920 failing to fill the space.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the features in the above embodiments can be combined with each other without conflict, and the present invention can also have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. In addition, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. An anti-empty support, characterized in that: It comprises a support body (11) and a base (13) which are connected to each other, wherein the top of the support body (11) is used to be connected to a beam body, the base (13) is located at the bottom of the support body (11), and the bottom surface of the base (13) is a casting surface (131); The casting surface (131) is provided with a drainage-assisting protrusion (132), the top surface of the drainage-assisting protrusion (132) is arranged in an outwardly convex arc shape and extends to the casting surface (131); The drainage-assisting protrusion (132) is used to be arranged in the template (910) and is used to be opposite to the bottom wall of the template (910) so as to cooperate with the template (910) to perform grouting operations, thereby fixing the base (13) to the bridge pier; The casting surface (131) is provided with an exhaust groove (133), and each of the exhaust grooves (133) extends in a straight line from the edge of the exhaust-assisting protrusion (132) to the edge of the casting surface (131); there are a plurality of exhaust grooves (133), and the plurality of exhaust grooves (133) are arranged along the circumference of the exhaust-assisting protrusion (132); The base (13) is also provided with an exhaust hole (134), which is arranged through the base (13) and extends to the side surface or top surface of the base (13).

2. The anti-empty support according to claim 1, characterized in that: There are a plurality of exhaust holes (134), and the openings of the exhaust holes (134) located on the casting surface (131) are located between adjacent exhaust grooves (133).

3. The anti-empty support according to claim 1, characterized in that: The opening of the exhaust hole (134) located on the casting surface (131) is located at the edge of the exhaust-aiding protrusion (132).

4. The anti-empty support according to claim 1, characterized in that: The top surface of the drainage-aiding protrusion (132) is covered with a water-absorbent and serous membrane (15).

5. The anti-emptiness support according to claim 4, characterized in that: The edge of the water-absorbing and serous membrane (15) is located at one end of the exhaust groove (133) close to the edge of the exhaust-assisting protrusion (132).

6. The anti-empty support according to claim 1, characterized in that: The casting surface (131) is also fixedly provided with an anchor bolt (135), and the base (13) is fixed to the top surface of the pier via the anchor bolt (135), and one end of the anchor bolt (135) located on the casting surface (131) is located on the top surface of the drainage-aiding protrusion (132).

7. A bridge, characterized in that: It comprises a beam body, a bridge pier and an anti-emptying support (10) as claimed in any one of claims 1 to 6; The top of the support body (11) is connected to the beam body, and the casting surface (131) cooperates with the template (910) to perform grouting operations, thereby fixing the base (13) to the pier.

Images