A super-large diameter basin-type swivel bearing for bridge construction and its construction technology

Abstract

The present invention discloses an oversized diameter pot-type swivel support for bridge construction and its construction process, including: a support cushion stone, a plurality of reserved bolt holes are arranged above the support cushion stone, a pot-type swivel support is arranged above the support cushion stone, the pot-type swivel support includes a lower seat plate, a rubber elastic body, a middle lining plate, an upper seat plate, a sealing copper ring and a plurality of anchor bolts; and a plurality of dust covers. The present invention presses the dust cover to make the through groove pass through the arc strip and stick to the outer side of the upper seat plate, loosens the dust cover, and the dust cover falls by its own gravity, the upper part of the through groove is stuck in the upper inner groove, a part of the through groove moves to the bottom of the arc strip, and the pushing plate pushes the closing plate downward through the connecting rod to fill the through groove below the arc strip, so as to prevent airflow and dust from blowing into the dust cover from the through groove, and the internal thread reinforcement sleeve is rotated to the outside of the dust cover stuck above the arc strip through the inner handle, and it does not need the cooperation of multiple people, and the installation time is short and the efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of large-diameter bearing installation and construction, and in particular to an ultra-large-diameter basin-type swivel bearing for bridge construction and a construction process thereof. Background Art

[0002] With the development of bridge rotation technology, rotation construction is increasingly used in crossing valleys, rivers and operating railways. The rotation structures are diverse in form and gradually develop towards large-scale and diversified development. The number of rotation tonnages exceeding 30,000 tons is gradually increasing, and the specifications and dimensions of rotation supports are also increasing.

[0003] At the end of the installation of the swivel bearing, in order to prevent dust from entering the swivel bearing before rotation and causing pollution to the inside of the swivel bearing, a dust cover will be installed on the outside of the swivel bearing. The existing dust covers are all around the outside of the upper seat plate of the swivel bearing. Several people work together to install a dust cover. After supporting it in the correct position, use fixing strips and multiple equidistantly arranged screws to fix its position. It takes a lot of people and time to fix the dust cover, which reduces the efficiency of the entire installation and construction of the swivel bearing to a certain extent. Summary of the invention

[0004] The purpose of the present invention is to provide an extra-large diameter pot-type swivel bearing for bridge construction and its construction process, which solves the problem that the installation of the dust cover of the traditional swivel bearing requires the cooperation of many people. After supporting it in the correct position, it is fixed in position using a fixing strip and a plurality of equidistantly arranged screws. The dust cover requires a large number of people and a lot of time to fix, which reduces the efficiency of the entire installation and construction of the swivel bearing to a certain extent.

[0005] The present invention solves the above technical problems through the following technical solutions, which include:

[0006] A support pad stone, wherein a plurality of reserved bolt holes are arranged above the support pad stone, a pot-type swivel support is arranged above the support pad stone, and the pot-type swivel support comprises a lower seat plate, a rubber elastic body, a middle lining plate, an upper seat plate, a sealing copper ring and a plurality of anchor bolts;

[0007] A plurality of dust covers, which are arranged in a ring shape in sequence on the outside of the pot-type swivel support, and are used to prevent the pot-type swivel support in front of the swivel from being polluted by dust and other debris, and a plurality of dust covers are provided with through grooves inside;

[0008] A surrounding assembly, the surrounding assembly is arranged on the outer side of the upper seat plate, the surrounding assembly is used to quickly surround the dust cover on the outer side of the upper seat plate, the surrounding assembly includes a plurality of self-clamping parts, and the plurality of self-clamping parts are sequentially arranged in a ring shape on the outer side of the upper seat plate;

[0009] The self-clamping member includes an arc-shaped strip fixed to the outer surface of the upper seat plate, the top and bottom of the arc-shaped strip are provided with inner grooves, the inner side of the arc-shaped strip is provided with an arc-shaped groove, a plurality of connecting rods are arranged inside the arc-shaped groove, the two ends of the connecting rods respectively extend to the inside of the two inner grooves, a plurality of pressing plates are fixed to the outside of the connecting rods, a first spring is sleeved on the outside of the plurality of connecting rods, a pushing plate is fixed between one ends of the plurality of connecting rods, and a closing plate is fixed between the other ends of the plurality of connecting rods.

[0010] Preferably, the enclosure assembly also includes a reinforcement piece, which is arranged on the outer side of the upper seat plate, and is used to improve the installation stability of the dust cover. The reinforcement piece includes an internally threaded reinforcement sleeve threadedly connected to the outer side of the upper seat plate, and a plurality of internal handles are arranged on the outer surface of the internally threaded reinforcement sleeve.

[0011] Preferably, the rubber elastic body includes a truncated cone elastic body and a plurality of inclined fan-shaped elastic bodies, the interior of the truncated cone elastic body is provided with a plurality of inner cavities and grooves arranged in a ring shape in sequence, a second spring is fixed inside the plurality of inner cavities, a U-shaped mounting seat is slid inside the plurality of inner cavities, the top of the U-shaped mounting seat extends to the interior of the groove, a roller is rotatably provided on the inner side of the U-shaped mounting seat, and an arc-shaped groove is provided on the inclined surface of the plurality of inclined fan-shaped elastic bodies.

[0012] Preferably, the rubber elastic body is arranged inside the basin cavity of the lower seat plate, the sealing copper ring is arranged around the inner wall of the lower seat plate, the middle lining plate is installed inside the basin cavity of the lower seat plate and is located above the rubber elastic body, the upper seat plate is arranged above the middle lining plate, and the plurality of anchor bolts are respectively arranged in a ring shape inside the upper seat plate and the lower seat plate.

[0013] A construction process for a super-large diameter basin-type swivel bearing for bridge construction comprises the following steps:

[0014] Step 1: Main preparations before support installation;

[0015] Step 2: Anchoring the lower seat plate anchor assembly;

[0016] Step 3: Install the lower seat plate;

[0017] Step 4: Install the rubber elastic body;

[0018] Step 5: Install the middle lining board;

[0019] Step 6: Install the upper seat plate and its components;

[0020] Step 7: Install the dust cover.

[0021] Preferably, based on step one: the supporting cushion stone is chiseled and cleaned, the embedded supporting Φ32 threaded steel bar head is measured and leveled, the elevation accuracy is controlled within 2mm, the pot-type swivel bearing is assembled on site in parts, and the bearing components are assembled after the pot-type swivel bearing passes the on-site acceptance inspection, mainly assembling the lower seat plate and anchor bolts, assembling the middle lining plate, and assembling the upper seat plate and anchor bolts, measuring and laying out, measuring and laying out the horizontal and vertical axes and the radius plane position of the pot-type swivel bearing, and popping up the ink line.

[0022] Preferably, based on step two: after the lower seat plate and its anchor bolts are assembled, they are manually hoisted to the center of the supporting cushion stone with a car crane, the anchor bolts around the lower seat plate are aligned with the reserved bolt holes, and they are slowly lowered until they reach the designed position, the plane position of the lower seat plate and the height difference around them are measured and verified, and the height difference around them is controlled to be no more than 2mm, and high-strength non-shrinkage grouting material is poured into the reserved holes through the edge gaps around the lower seat plate, and vibrated to compact it.

[0023] Preferably, based on step three: after the grouting material in the reserved hole has finally set, loosen the anchor bolts to dismantle and lift the lower seat plate body, cut off the temporary supporting steel bar head on the top surface of the supporting cushion stone, retain the wooden wedge support within a diameter of 1.5 meters at the center, clean up the scum and debris on the top surface of the supporting cushion stone after roughening and sprinkle water to moisten it, use slow-setting high-strength non-shrinkage grouting material, mix it evenly in plates according to the ratio and its calculated amount, pile the material in the center of the supporting cushion stone in turn, and gradually expand it to the outer edge until it covers the entire supporting cushion stone, and at the same time protect the anchor bolt sleeve to prevent the slurry from being poured Insert it into the sleeve. After the material is spread, use a scraper to scrape the top surface of the grouting material flat, with the center high and the surrounding low. The overall height is slightly higher than the designed elevation. The lower seat plate body is hoisted, and each anchor bolt position is coordinated by workers. It is slowly lowered. During the lowering process, the lower seat plate body is rotated to adjust to the anchor hole position in real time. When the bolt hole position is aligned with the anchor hole position of the lower seat plate, the coordinated workers around it quickly install the anchor bolts and tighten them with a wrench. The lower seat plate contacts the grouting material, and the slurry gradually overflows around the edge. After the slurry overflow stabilizes, appropriate material is added to the local shortage of material on the outer edge, and the lower seat plate is installed by the slurry sitting method.

[0024] Preferably, based on step four and step five: after the lower seat plate is installed, the inner surface of the pelvic cavity of the lower seat plate is cleaned and silicone grease is applied, and the rubber elastic body is assembled in the pelvic cavity in blocks, wherein the truncated cone elastic body is located in the center of the pelvic cavity, and 8 inclined fan-shaped elastic bodies are distributed around the truncated cone elastic body. The central truncated cone elastic body is placed first, and then the inclined fan-shaped elastic bodies around the truncated cone elastic body are placed in sequence. After the rubber elastic body is installed, the sealing copper ring is first installed around the pelvic cavity, and then the surface of the rubber elastic body is cleaned and silicone grease is evenly applied;

[0025] The middle lining is processed and manufactured in two pieces and assembled into a whole on site. Workers use a car crane to hoist it into the basin of the lower seat plate, sit on the rubber elastomer, check and clean the polytetrafluoroethylene wear-resistant sliding plate on the top surface of the middle lining, and evenly apply silicone grease.

[0026] Preferably, based on step six and step seven: the upper seat plate is processed and manufactured in two pieces, assembled into a whole on site, the anchor bolts on the upper seat plate are installed, and the workers cooperate with the car crane to hoist it on the middle lining plate. After it is accurately placed in place, the height difference around the upper seat plate is measured and verified and meets the requirements, and the upper seat plate and the lower seat plate are temporarily locked with temporary anchor bolts;

[0027] After the installation of the pot-type swivel support is completed, the bolt anchor holes are reserved around the upper base plate, and the dust cover is installed and fixed in blocks along the upper base plate to prevent the pot-type swivel support from being exposed for a long time before the rotation and being contaminated by dust and other debris.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. Press the dust cover so that the groove passes through the arc strip and sticks to the outside of the upper seat plate. Loosen the dust cover, and the dust cover falls by its own gravity. The upper part of the groove is stuck in the upper inner groove, and a part of the groove moves to the bottom of the arc strip. The pushing plate pushes the closing plate downward through the connecting rod to fill the groove under the arc strip to prevent airflow and dust from blowing into the dust cover from the groove. Use the inner handle to rotate the internal thread reinforcement sleeve until it is stuck outside the dust cover above the arc strip. It does not require the cooperation of multiple people, takes less time to install, and is highly efficient.

[0030] 2. After fixing the truncated cone elastic body, place the inclined surface of the inclined fan-shaped elastic body on the inclined surface of the edge of the truncated cone elastic body. Under the rolling action of the roller, the inclined fan-shaped elastic body quickly and accurately slides into the correct installation position between the truncated cone elastic body and the pelvic cavity, effectively improving the assembly speed and convenience of the rubber elastic body, and reducing the time required for the inclined fan-shaped elastic body to be assembled between the truncated cone elastic body and the inner wall of the pelvic cavity.

[0031] 3. The slow-setting bearing grouting material is installed and constructed by the grouting method. A slow-setting bearing grouting material is developed, which can not only extend the material laying time, but also more intuitively control the quality of the grouting layer, ensuring the uniform force of the bridge rotation bearing and the safety and stability of the rotation.

[0032] 4. Use the slurry seating method to install the bearing, making full use of the elastic downward deformation of the middle part of the base plate under the bearing during hoisting. During the slurry seating process, the slurry is squeezed from the center of the bearing to the surrounding areas, effectively eliminating the hollowing under the bearing. The installation quality is more intuitive and can better guarantee the installation quality.

[0033] 5. Traditional large-tonnage swivel bearings mostly use ball joint bearings, which are difficult to process and transport as a whole, while basin-type swivel bearings are processed and transported in parts, avoiding the transportation of large pieces and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0035] Figure 2 It is a partial exploded view of the upper seat plate and the dust cover in the present invention;

[0036] Figure 3 for Figure 2 The enlarged schematic diagram of the middle A part;

[0037] Figure 4 It is a split cross-sectional view of the present invention;

[0038] Figure 5 for Figure 4 The enlarged schematic diagram of the middle part B;

[0039] Figure 6 It is a schematic diagram of the disassembly of the rubber elastic body in the present invention;

[0040] Figure 7 for Figure 6 The enlarged schematic diagram of the middle C part;

[0041] Figure 8 It is a process flow chart of the present invention.

[0042] 1. Supporting pad stone; 2. Reserved bolt holes; 3. Basin type swivel bearing; 31. Lower seat plate; 32. Rubber elastic body; 321. Cone elastic body; 322. Slanted fan-shaped elastic body; 323. Inner cavity; 324. Groove; 325. Second spring; 326. U-shaped mounting seat; 327. Roller; 328. Arc-shaped slot; 33. Middle lining plate; 34. Upper seat plate; 35. Sealing copper ring; 36. Anchor bolt; 4. Dust cover; 5. Through groove; 6. Enclosing assembly; 61. Arc strip; 62. Inner groove; 63. Arc-shaped groove; 64. Connecting rod; 65. Pressing plate; 66. First spring; 67. Pushing plate; 68. Closing plate; 69. Internal thread reinforcement sleeve; 610. Inner handle. DETAILED DESCRIPTION

[0043] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0044] The present invention provides a technical solution: a super-large diameter basin-type swivel bearing for bridge construction, such as Figure 1 and Figure 4As shown, it includes a supporting pad stone 1, multiple dust covers 4 and an enclosure component 6. A plurality of reserved bolt holes 2 are arranged above the supporting pad stone 1. The sizes of the multiple reserved bolt holes 2 are compatible with the sizes of the anchor bolts 36 assembled on the lower seat plate 31, and the number is equal. A basin-type swivel support 3 is arranged above the supporting pad stone 1. The basin-type swivel support 3 includes a lower seat plate 31, a rubber elastic body 32, a middle lining plate 33, an upper seat plate 34, a sealing copper ring 35 and multiple anchor bolts 36. The rubber elastic body 32 is arranged inside the basin cavity of the lower seat plate 31, and silicone grease is applied on the contact surface between the rubber elastic body 32 and the basin cavity. The rubber elastic body 32 plays a role in shock absorption and vibration isolation, which can effectively reduce the influence of vibration and impact force on the structure and protect the upper structure from damage caused by vibration. The flexibility of the rubber can effectively disperse the load and reduce the potential damage to the support and structure caused by stress concentration. The sealing copper ring 35 is arranged around the inner wall of the lower seat plate 31, and the sealing copper ring 35 can have It can effectively block moisture and dirt from entering the interior of the support, and at the same time help to maintain the stability of the lubricant and prevent it from leaking, thereby ensuring the normal operation of the support. The middle lining plate 33 is installed inside the pelvic cavity of the lower seat plate 31 and is located above the rubber elastic body 32. Silicone grease is applied to the contact surface between the middle lining plate 33 and the rubber elastic body 32. The silicone grease has good lubrication properties and can form a lubricating film on the moving part of the support, reduce friction and wear, extend the service life of the support, and avoid component damage caused by friction. At the same time, silicone grease has certain anti-corrosion properties and can form a protective film on the metal surface to prevent the intrusion of moisture and other corrosive media, reduce metal oxidation, and maintain good performance within a wide temperature range. It is suitable for various climatic conditions and temperature changes to ensure that the support works normally at high or low temperatures. The upper seat plate 34 is arranged above the middle lining plate 33, and a plurality of anchor bolts 36 are arranged in a ring shape in sequence on the upper seat plate 34 and the interior of the lower seat plate 31.

[0045] like Figure 5-7As shown, the rubber elastic body 32 includes a truncated cone elastic body 321 and a plurality of inclined fan-shaped elastic bodies 322, eight inclined fan-shaped elastic bodies 322 are provided, a plurality of inner cavities 323 and grooves 324 arranged in a ring shape are provided inside the truncated cone elastic body 321, each groove 324 is provided at a position where an inner cavity 323 is provided, a second spring 325 is fixed inside each of the plurality of inner cavities 323, a U-shaped mounting seat 326 is slidably provided inside each of the plurality of inner cavities 323, one end of the second spring 325 is fixed on the U-shaped mounting seat 326, and the upper part of the U-shaped mounting seat 326 extends to the groove Inside the groove 324, a roller 327 is rotated on the inner side of the U-shaped mounting seat 326, and the inclined fan-shaped elastomer 322 rolls with the help of the roller 327, helping the inclined fan-shaped elastomer 322 to be quickly placed in the correct position between the truncated cone elastomer 321 and the inner wall of the pelvic cavity. Arc-shaped grooves 328 are provided on the inclined surfaces of multiple inclined fan-shaped elastomers 322. When the inclined fan-shaped elastomer 322 is placed in the correct position between the truncated cone elastomer 321 and the inner wall of the pelvic cavity, the positions of the arc-shaped grooves 328 and the roller 327 correspond, and the roller 327 is pushed into the arc-shaped grooves 328 by the second spring 325.

[0046] like Figure 1 , Figure 2 and Figure 4 As shown, multiple dust covers 4 are arranged in a ring shape in sequence on the outer side of the basin-type swivel support 3. The dust covers 4 are used to prevent the basin-type swivel support 3 from being contaminated by dust and other debris before the swivel. A through groove 5 is opened inside the multiple dust covers 4. The size of the through groove 5 is adapted to the size of the arc strip 61. The enclosing component 6 is arranged on the outer side of the upper seat plate 34. The enclosing component 6 is used to quickly enclose the dust cover 4 on the outer side of the upper seat plate 34, saving manual time for installing and fixing the dust cover 4 with small bolts and screws. The enclosing component 6 includes multiple self-clamping parts, which can automatically limit the dust cover 4 and hang it on the outer surface of the upper seat plate 34. Multiple self-clamping parts are arranged in a ring shape in sequence on the outer side of the upper seat plate 34, and the number of self-clamping parts is consistent with the number of dust covers 4.

[0047] like Figure 2-4As shown, the self-clamping member includes an arc strip 61 fixed to the outer surface of the upper seat plate 34, the top and bottom of the arc strip 61 are provided with inner grooves 62, the inner side of the arc strip 61 is provided with an arc groove 63, a plurality of connecting rods 64 are arranged inside the arc groove 63, the two ends of the connecting rod 64 extend to the inside of the two inner grooves 62 respectively, a pressing sheet 65 is fixed to the outside of the plurality of connecting rods 64, the pressing sheet 65 is arranged in the arc groove 63, the outside of the plurality of connecting rods 64 is sleeved with a first spring 66, when the first spring 66 is at the original length (i.e. when there is no external pressure), the top of the pressing sheet 65 fits with the top of the inner wall of the arc groove 63, a pushing sheet 67 is fixed between one end of the plurality of connecting rods 64, and the pushing sheet 66 7 is in the upper inner groove 62, and a closing plate 68 is fixed between the other ends of the multiple connecting rods 64. The closing plate 68 is in the lower inner groove 62. When the first spring 66 is at its original length, the top of the closing plate 68 is flush with the top of the arc strip 61. The enclosing component 6 also includes a reinforcing member, which is arranged on the outer side of the upper seat plate 34. The reinforcing member is used to improve the installation stability of the dust cover 4. The reinforcing member includes an internal thread reinforcing sleeve 69 threadedly connected to the outer side of the upper seat plate 34. The outer surface of the internal thread reinforcing sleeve 69 is provided with multiple inner handles 610. The internal thread reinforcing sleeve 69 is screwed to its lower side and buckled on the upper edge of the dust cover 4 to further fix the dust cover 4 on the outer side of the upper seat plate 34.

[0048] When installing the rubber elastic body 32, first place the truncated cone elastic body 321 at the center of the pelvic cavity of the lower seat plate 31, and then install the inclined fan-shaped elastic body 322, with the inclined surface of the inclined fan-shaped elastic body 322 correspondingly placed on the inclined surface of the edge of the truncated cone elastic body 321, and push the inclined fan-shaped elastic body 322 to the gap between the truncated cone elastic body 321 and the pelvic cavity, and the inclined fan-shaped elastic body 322 presses the roller 327 that is pressed down at this time, and helps the inclined fan-shaped elastic body 322 to roll under the rolling action of the roller 327. Slide into the correct installation position between the truncated cone elastic body 321 and the pelvic cavity, at which time the roller 327 and the arc-shaped slot 328 correspond, and under the thrust of the second spring 325, the roller 327 is inserted into the arc-shaped slot 328 to position the inclined fan-shaped elastic body 322, and then the other inclined fan-shaped elastic bodies 322 are installed in turn, which can effectively improve the assembly speed and convenience of the rubber elastic body 32, and reduce the time required for the inclined fan-shaped elastic body 322 to be assembled between the truncated cone elastic body 321 and the inner wall of the pelvic cavity.

[0049] After the upper seat plate 34 in the basin-type swivel support 3 is installed, the through groove 5 on the dust cover 4 is inserted into the corresponding arc strip 61, and the dust cover 4 is pressed to fit the outer surface of the upper seat plate 34. The dust cover 4 is loosened, and the dust cover 4 falls by its own gravity, squeezing the pushing piece 67 downward, and the part above the through groove 5 will be stuck in the upper inner groove 62. Similarly, a part of the through groove will move to the bottom of the arc strip 61. At this time, the pushing piece 67 will push the connecting rod 64 and the pressing piece 65 downward, and the pressing piece 65 will The first spring 66 is squeezed, and at the same time, the connecting rod 64 moves the closing plate 68 downward. The closing plate 68 fills the groove 5 below the arc strip 61 to prevent the airflow from blowing into the dust cover 4 from the groove 5, and the dust enters the basin-type swivel support 3 from the blown-open place. Then, several staff members stand on the outer circle of the basin-type swivel support 3, and rotate the internal thread reinforcement sleeve 69 through the inner handle 610. The internal thread reinforcement sleeve 69 will be stuck on the outside of the dust cover 4, pressing the dust cover 4 above the arc strip 61 to reinforce the installation of the dust cover 4.

[0050] A construction process for a super-large diameter basin-type swivel bearing for bridge construction comprises the following steps:

[0051] Step 1: Main preparations before support installation;

[0052] Step 2: Anchoring the lower seat plate 31 anchoring assembly;

[0053] Step 3: Install the lower seat plate 31;

[0054] Step 4: Install the rubber elastic body 32;

[0055] Step 5: Install the middle lining plate 33;

[0056] Step 6: Install the upper seat plate 34 and its components;

[0057] Step 7: Install the dust cover 4.

[0058] Based on step one: the supporting cushion stone 1 is chiseled and cleaned, the embedded supporting Φ32 threaded steel bar head is measured and leveled, the elevation accuracy is controlled within 2mm, the basin-type swivel bearing 3 is assembled on site in parts, and the bearing components are assembled after the basin-type swivel bearing 3 passes the on-site acceptance, mainly assembling the lower seat plate 31 and the anchor bolts 36, assembling the middle lining plate 33, and assembling the upper seat plate 34 and the anchor bolts 36, measuring and laying out, measuring and laying out the horizontal and vertical axes and the radial plane position of the basin-type swivel bearing 3, and popping out the ink line.

[0059] Based on step 2: After the lower seat plate 31 and its anchor bolts 36 are assembled, they are hoisted to the center of the supporting pad stone 1 by manual operation and a truck crane. The anchor bolts 36 around the lower seat plate 31 are aligned with the reserved bolt holes 2, and the lower seat plate 31 is slowly lowered until it reaches the designed position. The plane position and the height difference around the lower seat plate 31 are measured and verified. The height difference around the lower seat plate 31 is controlled to be no more than 2mm. High-strength non-shrinkage grouting material is poured into the reserved holes through the edge gaps around the lower seat plate 31, and vibrated to compact.

[0060] Due to the thin thickness and large area of ​​the bearing mortar layer, affected by the surface tension and its own consistency of the slurry, the conventional quick-setting bearing grouting method is used for construction. The grouting operation time is long and the slurry cannot be completely filled. During the process, it is difficult to avoid the hollowing phenomenon caused by the initial setting of the slurry injected in advance. The overall grouting quality is difficult to control. Here, slow-setting, non-shrinkage, high-strength bearing grouting material is used. The slow-setting time can reach 4-6 hours, and the grouting layer is spread with cloth, and the height is slightly higher than the designed thickness.

[0061] Based on step three: after the grouting material in the reserved hole is finally set, loosen the anchor bolts 36 to remove the lower seat plate 31 body, cut off the temporary support steel bar head on the top surface of the supporting cushion stone 1, retain the wooden wedge support within the diameter of 1.5 meters at the center, clean up the scum and debris on the top surface of the roughened supporting cushion stone 1 and sprinkle water to moisten it, use slow-setting high-strength non-shrinkage grouting material, mix it evenly according to the ratio and its calculated amount, pile it in the center of the supporting cushion stone 1 in turn, and gradually expand it to the outer edge until it covers the entire supporting cushion stone 1, and at the same time protect the anchor bolt sleeve to prevent the slurry from pouring into the sleeve, After the material is spread, a scraper is used to scrape the top surface of the grouting material flat, with the center high and the surrounding low, slightly higher than the designed elevation as a whole. The lower seat plate 31 body is hoisted, and each anchor bolt 36 position is coordinated by workers, and slowly lowered. During the lowering process, the lower seat plate 31 body is rotated to adjust to the anchor hole position in real time. When the bolt hole position is aligned with the anchor hole position of the lower seat plate 31, the coordinated workers around it quickly install the anchor bolt 36 and tighten it with a wrench. The lower seat plate 31 contacts the grouting material, and the slurry gradually overflows around the edge. After the slurry overflow stabilizes, appropriate material is added to the local shortage of material on the outer edge, and the lower seat plate 31 is installed by the slurry sitting method.

[0062] Based on step 4 and step 5: after the lower seat plate 31 is installed, the inner surface of the pelvic cavity of the lower seat plate 31 is cleaned and silicone grease is applied, and the rubber elastic body 32 is assembled in the pelvic cavity in blocks, wherein the truncated cone elastic body 321 is located in the center of the pelvic cavity, and 8 inclined fan-shaped elastic bodies 322 are distributed around the truncated cone elastic body 321. The central truncated cone elastic body 321 is placed first, and then the inclined fan-shaped elastic bodies 322 around the truncated cone elastic body 321 are placed in sequence. After the rubber elastic body 32 is installed, the sealing copper ring 35 is first installed around the pelvic cavity, and then the surface of the rubber elastic body 32 is cleaned and silicone grease is evenly applied;

[0063] The middle lining plate 33 is processed and manufactured in two pieces and assembled into a whole on site. The workers cooperate with the car crane to hoist it into the pelvic cavity of the lower seat plate 31, sit on the rubber elastic body 32, check and clean the polytetrafluoroethylene wear-resistant sliding plate on the top surface of the middle lining plate 33, and evenly apply silicone grease.

[0064] Based on step six and step seven: the upper seat plate 34 is processed and manufactured in two pieces, assembled into a whole on site, and the anchor bolts 36 on the upper seat plate 34 are installed. The workers cooperate with the car crane to hoist it on the middle lining plate 33. After it is accurately placed in place, the height difference around the upper seat plate 34 is measured and verified and meets the requirements. The temporary anchor bolts 36 are used to temporarily lock the upper seat plate 34 and the lower seat plate 31;

[0065] After the installation of the basin-type swivel support 3 is completed, the bolt anchor holes reserved for processing around the upper seat plate 34 are used to install and fix the dust cover 4 in blocks along the upper seat plate 34 to prevent the basin-type swivel support 3 from being exposed for a long time before the rotation and being contaminated by dust and other debris.

[0066] The basin-type swivel bearing 3 is processed in parts, assembled on site, and installed in parts, which saves the transportation cost of large items and reduces the difficulty of lifting with lifting machinery. The slurry-sitting method of installation effectively avoids the bottom of the lower seat plate 31 from being empty, ensures the quality of the bearing installation, and summarizes valuable process and method experience for the installation of ultra-large diameter swivel bearings.

[0067] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. An ultra-large diameter basin-type swivel bearing for bridge construction, characterized in that: include: A support pad (1), wherein a plurality of reserved bolt holes (2) are arranged above the support pad (1), a pot-type swivel support (3) is arranged above the support pad (1), and the pot-type swivel support (3) comprises a lower seat plate (31), a rubber elastic body (32), a middle lining plate (33), an upper seat plate (34), a sealing copper ring (35), and a plurality of anchor bolts (36); A plurality of dust covers (4), the plurality of dust covers (4) being arranged in a ring shape in sequence on the outside of the pot-type swivel support (3), the dust covers (4) being used to prevent the pot-type swivel support (3) in front of the swivel from being contaminated by dust or other debris, and the plurality of dust covers (4) are each provided with a through groove (5) inside; A fixing assembly (6), the fixing assembly (6) being arranged on the outer side of the upper seat plate (34), the fixing assembly (6) being used to quickly fix the dust cover (4) on the outer side of the upper seat plate (34), the fixing assembly (6) comprising a plurality of self-clamping parts, the plurality of self-clamping parts being arranged in a ring shape in sequence on the outer side of the upper seat plate (34); The self-clamping member comprises an arc-shaped strip (61) fixed to the outer surface of the upper seat plate (34), the top and bottom of the arc-shaped strip (61) are provided with inner grooves (62), the inner side of the arc-shaped strip (61) is provided with an arc-shaped groove (63), a plurality of connecting rods (64) are arranged inside the arc-shaped groove (63), the two ends of the connecting rod (64) respectively extend to the inside of the two inner grooves (62), the outside of the plurality of connecting rods (64) are fixed with a pressing plate (65), the outside of the plurality of connecting rods (64) are sleeved with a first spring (66), a pushing plate (67) is fixed between one ends of the plurality of connecting rods (64), and a closing plate (68) is fixed between the other ends of the plurality of connecting rods (64).

2. The super-large diameter pot-type swivel bearing for bridge construction according to claim 1 is characterized in that: The enclosure assembly (6) also includes a reinforcement member, which is arranged on the outer side of the upper seat plate (34) and is used to improve the installation stability of the dust cover (4). The reinforcement member includes an internal thread reinforcement sleeve (69) threadedly connected to the outer side of the upper seat plate (34), and the outer surface of the internal thread reinforcement sleeve (69) is provided with a plurality of inner handles (610).

3. The super-large diameter pot-type swivel bearing for bridge construction according to claim 2 is characterized in that: The rubber elastic body (32) comprises a truncated cone elastic body (321) and a plurality of inclined fan-shaped elastic bodies (322); a plurality of inner cavities (323) and grooves (324) arranged in a circular pattern are provided inside the truncated cone elastic body (321); a second spring (325) is fixed inside each of the plurality of inner cavities (323); a U-shaped mounting seat (326) is slidably provided inside each of the plurality of inner cavities (323); the top of the U-shaped mounting seat (326) extends to the inside of the groove (324); a roller (327) is rotatably provided inside the U-shaped mounting seat (326); and an arc-shaped slot (328) is provided on the inclined surface of each of the plurality of inclined fan-shaped elastic bodies (322).

4. The super-large diameter pot-type swivel bearing for bridge construction according to claim 3 is characterized in that: The rubber elastic body (32) is arranged inside the basin cavity of the lower seat plate (31), the sealing copper ring (35) is arranged around the inner wall of the lower seat plate (31), the middle lining plate (33) is installed inside the basin cavity of the lower seat plate (31) and is located above the rubber elastic body (32), the upper seat plate (34) is arranged above the middle lining plate (33), and a plurality of the anchor bolts (36) are arranged in a ring shape in sequence inside the upper seat plate (34) and the lower seat plate (31).

5. A construction process for a super-large diameter pot-type swivel bearing for bridge construction, the construction process being applied to the pot-type swivel bearing as claimed in claim 4, comprising the following steps: Step 1: Main preparations before support installation; Step 2: Anchoring the lower seat plate (31) anchoring assembly; Step 3: Install the lower seat plate (31); Step 4: Installing the rubber elastic body (32); Step 5: Install the middle lining plate (33); Step 6: Install the upper seat plate (34) and its components; Step 7: Install the dust cover (4).

6. The construction process of the super-large diameter basin-type swivel bearing for bridge construction according to claim 5 is characterized in that: Based on step 1: the support cushion stone (1) is chiseled and cleaned, the embedded support Φ32 threaded steel bar head is measured and leveled, and the elevation accuracy is controlled within 2mm. The pot-type swivel support (3) is assembled on site in parts. After the pot-type swivel support (3) passes the on-site acceptance, the support components are assembled, mainly including the assembly of the lower seat plate (31) and the anchor bolts (36), the assembly of the middle lining plate (33), and the assembly of the upper seat plate (34) and the anchor bolts (36). The measurement and layout are carried out, and the horizontal and vertical axes and the radial plane position of the pot-type swivel support (3) are measured and laid out, and the ink line is popped out.

7. The construction process of the super-large diameter basin-type swivel bearing for bridge construction according to claim 5 is characterized in that: Based on step 2: After the lower seat plate (31) and its anchor bolts (36) are assembled, they are manually hoisted to the center of the supporting cushion stone (1) by a car crane, and the anchor bolts (36) around the lower seat plate (31) are aligned with the reserved bolt holes (2). The lower seat plate (31) is slowly lowered until it reaches the designed position. The plane position and the height difference around the lower seat plate (31) are measured and checked. The height difference around the lower seat plate (31) is controlled to be no more than 2 mm. High-strength non-shrinkage grouting material is poured into the reserved holes through the gaps around the edges of the lower seat plate (31) and vibrated to make it dense.

8. The construction process of the super-large diameter basin-type rotating bearing for bridge construction according to claim 5 is characterized in that: Based on step three: after the grouting material in the reserved hole is finally set, the anchor bolts (36) are loosened and the lower base plate (31) is removed and hoisted, the temporary support steel bar head on the top surface of the support cushion stone (1) is cut off, and the wooden wedge support within a diameter of 1.5 meters at the center is retained. The scum and debris on the top surface of the roughened support cushion stone (1) are cleaned and sprinkled with water to moisten it. The slow-setting high-strength non-shrinkage grouting material is used and mixed evenly in trays according to the ratio and the calculated amount. The material is piled in the center of the support cushion stone (1) in turn, and gradually expanded to the outer edge until it covers the entire support cushion stone (1). At the same time, the anchor bolt sleeve is well protected to prevent the slurry from being poured into the sleeve. After the material is spread, a scraper is used to scrape the top surface of the grouting material flat, with the center high and the surrounding low, slightly higher than the design elevation as a whole. The lower base plate (31) body is hoisted, and each anchor bolt (36) position is coordinated by a worker, and it is slowly lowered. During the lowering process, the lower base plate (31) body is rotated to adjust to the anchor hole position in real time. When the bolt hole position is aligned with the anchor hole position of the lower base plate (31), the surrounding coordinated workers quickly install the anchor bolt (36) and tighten it with a wrench. The lower base plate (31) contacts the grouting material, and the slurry gradually overflows around the edge. After the slurry overflow is stable, the local lack of material on the outer edge is appropriately supplemented, and the lower base plate (31) is installed by the grouting method.

9. The construction process of the super-large diameter basin-type rotating support for bridge construction according to claim 5 is characterized in that: Based on step 4 and step 5: after the lower seat plate (31) is installed, the inner surface of the pelvic cavity of the lower seat plate (31) is cleaned and coated with silicone grease, and the rubber elastic body (32) is assembled in the pelvic cavity in blocks, wherein the truncated cone elastic body (321) is located at the center of the pelvic cavity, and the eight inclined fan-shaped elastic bodies (322) are distributed around the truncated cone elastic body (321), and the central truncated cone elastic body (321) is first placed, and then the surrounding inclined fan-shaped elastic bodies (322) are placed in sequence. After the rubber elastic body (32) is installed, the sealing copper ring (35) is first installed around the pelvic cavity, and then the surface of the rubber elastic body (32) is cleaned and evenly coated with silicone grease; The middle lining plate (33) is processed and manufactured in two pieces and assembled into a whole on site. The worker cooperates with the automobile crane to install it in the pelvic cavity of the lower seat plate (31), sits on the rubber elastic body (32), checks and cleans the polytetrafluoroethylene wear-resistant sliding plate on the top surface of the middle lining plate (33), and evenly applies silicone grease.

10. The construction process of the super-large diameter basin-type rotating support for bridge construction according to claim 5 is characterized in that: Based on step six and step seven: the upper seat plate (34) is processed and manufactured in two pieces, assembled on site into a whole, and the anchor bolts (36) on the upper seat plate (34) are installed. The worker cooperates with the automobile crane to hoist it on the middle lining plate (33). After it is accurately placed in place, the height difference around the upper seat plate (34) is measured and checked. After it meets the requirements, the upper seat plate (34) and the lower seat plate (31) are temporarily locked with temporary anchor bolts (36); After the installation of the pot-type swivel support (3) is completed, the bolt anchor holes reserved for processing around the upper seat plate (34) are used to install and fix the dust cover (4) in blocks along the upper seat plate (34) to prevent the pot-type swivel support (3) from being exposed for a long time before the swivel and being contaminated by dust and other debris.

Images