A positioning and embedding structure for precisely controlling the positioning of a support embedded bolt hole

Abstract

The utility model discloses a kind of positioning pre-burying structures of precise control support pre-burying bolt hole, including telescopic sleeve pipe beam of double layer, coaxial center column, end adjusting column, inner mold foam column and anti-floating pull rod, further including support and cushion stone template.The utility model is lower in cost, can also satisfy the quality demand of construction site, so that the construction of support cushion stone and pre-burying hole is more simple and accurate, all telescopic adjusting structures are using bolt fastening clamping mode, use method is relatively simple and easy to use, construction personnel can quickly get started without special training, reduce the operation difficulty, improve work efficiency, applicable to various types of support model, with strong adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and in particular to a positioning structure for pre-embedded bolt holes in bearings. Background Technology

[0002] A bridge bearing pad is a concrete component located atop piers and abutments in the bridge substructure. It is typically rectangular or cylindrical and used for the precise installation of bridge bearings. It is a crucial transitional component connecting the bridge superstructure (beams, slabs) and substructure (piers, abutments). Bridge bearings are equipped with bearing bolts to ensure the stability and integrity of the connection between the bearings and the substructure. These two components are used as a set, and the bearing bolts need to be embedded in the bearing pad to ensure a secure connection between the bearing and the pad. See also... Figure 1 As shown, pre-embedded bolt holes are reserved during the pad stone construction stage to embed bearing bolts, ensuring accurate and quick installation of bridge bearings and stability during use. Therefore, the planar position and depth of the pre-embedded bolt holes must match the spacing and length of the bearing bolts. Thus, the hole position accuracy of the pre-embedded bolt holes needs to be strictly controlled during pad stone construction. During the pad stone concrete pouring process, it is necessary to ensure that the positioning of the pre-embedded bolt holes does not shift, preventing the bearing bolts from being unable to be installed. At the same time, the elevation of the finished concrete surface also needs to be strictly controlled to ensure that the bridge bearing elevation does not exceed the allowable deviation.

[0003] Currently, PVC pipes are used as inner formwork pipes in construction, with pre-embedded bolt holes formed inside the foundation stone. This traditional method has the following drawbacks during construction:

[0004] 1. Wasting time in single-hole positioning of inner mold tube: The traditional construction method involves laying out and positioning each reserved hole during the construction of the pad stone formwork, which wastes a lot of construction time and affects the construction progress.

[0005] 2. Ineffective installation and fixation of inner formwork tubes: Since inner formwork tubes need to be installed and fixed before steel reinforcement construction, there is a lack of unified and stable fixing methods. In addition, the space in the steel reinforcement skeleton of the pad stone is limited. In actual construction, they are often disturbed and misaligned due to steel reinforcement binding.

[0006] 3. Low installation accuracy of inner mold tube: The lateral extrusion force of concrete pouring causes the inner mold tube to shift. During subsequent installation, the center deviation between the support bolt and the reserved hole position is large, and in some cases, it cannot be installed. It is necessary to drill holes later or even rework and re-pour the pad stone, which seriously affects the construction progress. The installation accuracy of plane position and depth does not meet the requirements.

[0007] IV. Poor control of the elevation accuracy of the finished surface of the foundation stone concrete: The elevation of the finished surface cannot be accurately controlled during the pouring of foundation stone concrete, resulting in excessive elevation deviation, which directly affects the installation accuracy of the superstructure.

[0008] V. Disadvantages of existing tools: Existing tools for solving the above problems all adopt the method of connecting the inner mold tube and the outer formwork of the pad concrete to form a mold frame or clamp, which makes the use of the tools very limited. When adjusting, it is only possible to control the relative position between the inner mold tube and the outer formwork, and it is impossible to achieve complete and precise control of the inner mold tube. Utility Model Content

[0009] The purpose of this utility model is to provide a positioning and pre-embedded structure for precisely controlling the pre-embedded bolt holes of the support. It aims to solve the technical problems of the existing pre-embedded bolt hole formation, such as the waste of time due to the separate positioning of the inner mold tube, the inability to effectively install and fix, and the low installation accuracy. It also aims to solve the technical problem of poor elevation accuracy control of the finished surface of the pad stone concrete.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A positioning and pre-embedded structure for precisely controlling the pre-embedded bolt holes of a support includes a ruler frame, which comprises:

[0012] The double-layer telescopic sleeve beam consists of a fixed outer sleeve in the middle and two movable inner sleeves symmetrically arranged at the ends. The inner end of the movable inner sleeve is inserted into the outer end of the fixed outer sleeve, and the two are horizontally adjustable. The lower fixed outer sleeve and the upper fixed outer sleeve are vertically aligned at their centers.

[0013] A coaxial central column passes through the center of the lower fixed outer sleeve and is fixedly connected to it. The coaxial central column also passes through the center of the upper fixed outer sleeve and is movably connected to it.

[0014] The end adjustment columns pass through the outer ends of the inner tubes of each movable scale and are vertically adjustable relative to the inner tubes of the movable scales.

[0015] The inner mold foam column covers and is fixed to the bottom of each end adjustment column.

[0016] Anti-buoyancy tie rods, with both ends passing through the bottom of adjacent inner mold foam columns.

[0017] The overlapping position between the inner tube of the movable scale and the outer tube of the fixed scale is detachably connected by fasteners.

[0018] The coaxial center column includes a center outer tube, which passes through and is fixedly connected to the lower fixed outer tube, and passes through the center of the upper fixed outer tube and is movably connected to it; it also includes a center scale inner column, the top end of which is inserted into the bottom end of the center outer tube, and the overlapping position of the two is detachably connected by fasteners, and the bottom end of the center scale inner column is inverted conical.

[0019] The end adjustment post includes an end outer tube that passes through and is fixedly connected to the inner tube of the movable scale; it also includes an end scale inner post that passes through the end outer tube, and the overlapping position of the two is detachably connected by fasteners.

[0020] The inner mold foam column is covered and fixed to the bottom of the inner column of each end scale. The bottom end of the inner column of the end scale is provided with a bottom plate, and the bottom surface of the inner mold foam column is flush with the bottom plate.

[0021] The inner foam column is a cylindrical polyethylene foam column.

[0022] The fasteners include fastening screws and fastening nuts. The fastening nuts are fixedly connected to the outer wall of each outer component, and the fastening screws pass through the fastening nuts and the corresponding screw holes on the outer wall and are tightened against each inner component.

[0023] It also includes supports and pad stone formwork. The ruler is set on the upper side of the support and inside the pad stone formwork. Horizontal pad stone steel mesh is tied inside the pad stone formwork. The coaxial central column coincides with the central axis of the pad stone. The cone tip of the column inside the central ruler is the finished concrete surface of the pad stone. The anti-buoyancy tie rod is tightly attached to the lower side of the pad stone steel mesh.

[0024] The anti-buoyancy tie rod is connected to the pad stone steel mesh by overlapping or binding.

[0025] Compared with the prior art, this utility model has the following features and beneficial effects:

[0026] This invention relates to the pre-positioning of bolt holes during the reinforcement binding stage of the bearing pad. It features a frame designed to detach from the outer formwork of the bearing pad, allowing for pre-positioning of the hole size and location within the outer formwork. The length of the double-layer telescopic sleeve beam within the frame is controlled by its extension and retraction to accommodate different bearing pad dimensions, thus controlling the distance between the bolt holes and the center point. The relative rotation between the upper and lower layers of the double-layer telescopic sleeve beam controls the angle formed between the bolt holes, thereby controlling the hole spacing. Adjusting the position of the cone tip of the coaxial central column, in conjunction with a total station, effectively controls the elevation of the finished surface of the bearing pad concrete. An inner foam column serves as the inner formwork for the bolt holes, and the size of the bolt holes is controlled by adjusting the size of the foam column. Adjusting the depth of the column base by adjusting the end adjusting column adjusts the depth of the inner foam column fixed at the column base, ultimately controlling the depth of the bolt holes within the outer formwork of the bearing pad. Simultaneously, a cleverly designed anti-buoyancy tie rod connects to the bearing pad reinforcement mesh, transmitting force through the mesh to the anti-buoyancy tie rod to resist the buoyancy of the concrete on the frame.

[0027] This invention not only accommodates different pad stone sizes and specifications, but also allows for flexible adjustment of the depth and diameter of the embedded holes based on the bolt hole length and diameter of different supports. While controlling the planar and vertical positions of the embedded holes, it can also mark the finished concrete surface of the pad stone. This allows for flexible application in different pad stone constructions, strictly controlling the pad stone elevation and ensuring the accuracy of the support and superstructure installation. Furthermore, each rectangular tube and cylindrical ruler is equipped with a scale, and the top of the coaxial central column is fitted with a level ball, enabling more precise control of the reserved bolt holes, ensuring the quality of the reserved holes while improving construction efficiency. The measuring frame uses multiple adjustments to group and position the inner mold foam columns of the bolt holes, eliminating the need for layout and positioning of each reserved hole individually. Precise control of the planar position, spacing, diameter, depth, and finished concrete surface elevation of the bolt holes saves construction time, accelerates construction progress, eliminates the need for rework, reduces most of the re-measurement, positioning, adjustment, and grinding procedures, and lowers construction costs.

[0028] This utility model employs appropriate steel materials and structural design for the frame to ensure sufficient strength and stability, guaranteeing the accuracy and stability of the support bolt installation. It can withstand the interference of concrete pouring during the pad stone construction on the frame's stability. The inner foam columns are individually fixed to the bottom of the end adjusting columns, without connection to the outer formwork. Furthermore, the frame is installed after the pad stone reinforcement is laid, preventing disturbance or misalignment due to prior reinforcement binding. This contributes to improving the overall effect of the support installation and increasing the construction efficiency of both the pad stone and the support. The polyethylene foam board used as the inner foam columns can be completely cleaned after concrete pouring, effectively increasing the bonding strength between the post-filled concrete in the bolt holes and the pad stone concrete, ensuring smooth subsequent construction.

[0029] This utility model's measuring frame is not only low-cost but also meets the quality requirements of construction sites, making the construction of support pads simpler and more precise. All expansion and contraction adjustment structures are secured with bolts, making it simple and easy to use. Construction personnel can quickly learn to operate it without special training. This reduces operational difficulty, improves work efficiency, and is suitable for various types of support models, demonstrating strong adaptability. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the structure of pre-embedded bolt holes in existing technology.

[0032] Figure 2 This is a schematic diagram of the planar structure of this utility model.

[0033] Figure 3 yes Figure 1 A side view of the components related to the upper and middle layer telescopic sleeve beam.

[0034] Figure 4 yes Figure 1 A side view of the structural components related to the middle and lower layer telescopic sleeve beam.

[0035] Figure 5 yes Figure 3 or Figure 4 Schematic diagram of the fasteners inside the expansion sleeve beam in section AA.

[0036] Figure 6 yes Figure 3 or Figure 4 Enlarged view of the connection between the central coaxial column and the telescopic sleeve beam.

[0037] Figure 7 yes Figure 6 A schematic diagram of the movable connection between the coaxial central column of the middle BB and the upper telescopic sleeve beam, and the structure of the fasteners inside the coaxial central column.

[0038] Figure 8 yes Figure 6 A schematic diagram of the fixed connection structure between the central CC coaxial column and the lower telescopic sleeve beam.

[0039] Reference numerals: 1 - Telescopic sleeve beam, 11 - Fixed outer sleeve, 111 - Lower fixed outer sleeve, 112 - Upper fixed outer sleeve, 12 - Inner tube of movable scale, 2 - Coaxial center column, 21 - Center outer sleeve, 22 - Inner column of center scale, 23 - Cone tip, 24 - Central circular hole, 3 - End adjusting column, 31 - End outer sleeve, 32 - Inner column of end scale, 33 - Bottom plate, 4 - Inner mold foam column, 5 - Anti-buoyancy tie rod, 6 - Lower structure entity, 7 - Pad stone formwork, 8 - Pad stone steel mesh, 9 - Finished concrete surface, 10 - Fastener, 101 - Fastening screw, 102 - Fastening nut, 103 - Screw hole, 20 - Bolt reserved hole, 30 - Pad stone concrete, 40 - Support bolt, 50 - Lower support steel plate. Detailed Implementation

[0040] See the examples. Figure 2-8 As shown, a positioning and pre-embedded structure for precisely controlling the pre-embedded bolt holes of a support includes a ruler frame, which comprises:

[0041] The double-layer telescopic sleeve beam 1 includes a fixed outer sleeve 11 in the middle and two movable inner scale tubes 12 symmetrically arranged at the ends. The inner end of the movable inner scale tube 12 is inserted into the outer end of the fixed outer sleeve 11, and the two are horizontally adjustable. The lower fixed outer sleeve 111 and the upper fixed outer sleeve 112 are vertically aligned at their centers. The overlapping position between the movable inner scale tube 12 and the fixed outer sleeve 11 is detachably connected by fasteners 10.

[0042] A coaxial central column 2 passes through the center of the lower fixed outer sleeve 111 and is fixedly connected to it. The coaxial central column 2 also passes through the center of the upper fixed outer sleeve 112 and is movably connected to it. The coaxial central column 2 includes a central outer sleeve 21, which passes through the lower fixed outer sleeve 111 and is fixedly connected to it, and passes through the center of the upper fixed outer sleeve 112 and is movably connected to it. It also includes a central scale inner column 22, the top end of which is inserted into the bottom end of the central outer sleeve 21, and the overlapping position of the two is detachably connected by a fastener 10. The bottom end of the central scale inner column 22 is inverted conical.

[0043] The end adjustment column 3 passes through the outer end of each movable scale inner tube 12 and is vertically adjustable relative to the movable scale inner tube 12. The end adjustment column 3 includes an end outer tube 31 that passes through and is fixedly connected to the movable scale inner tube 12; it also includes an end scale inner column 32 that passes through the end outer tube 31, and the overlapping position of the two is detachably connected by a fastener 10.

[0044] An inner mold foam column 4 is fixed to the bottom of each end adjusting column 3. The inner mold foam column 4 is also fixed to the bottom of each end scale inner column 32, and the bottom end of the end scale inner column 32 is provided with a bottom end plate 33. The bottom surface of the inner mold foam column 4 is flush with the bottom end plate 33. In this embodiment, the inner mold foam column 4 is a cylindrical polyethylene foam column.

[0045] The anti-buoyancy tie rod 5 has its two ends traversing the bottom of the adjacent inner mold foam column 4.

[0046] Fastener 10 includes fastening screw 101 and fastening nut 102. Fastening nut 102 is welded to the outer wall of each outer component. Fastening screw 101 passes through fastening nut 102 and screw hole 103 on corresponding outer wall and is pressed against each inner component.

[0047] The embedded structure also includes a lower structural entity 6 and a pad stone formwork 7. The lower structural entity 6 is a pier, cap beam, or abutment. A measuring frame is set on the upper side of the lower structural entity 6, inside the pad stone formwork 7. A horizontal pad stone reinforcement mesh 8 is tied inside the pad stone formwork 7. The coaxial central column 2 coincides with the central axis of the pad stone. The tip 23 of the cone of the inner column 22 of the central measuring frame is located at the finished concrete surface 9 of the pad stone. Anti-buoyancy tie rods 5 are tightly attached to the lower side of the pad stone reinforcement mesh 8. The anti-buoyancy tie rods 5 are lapped or tied to the pad stone reinforcement mesh 8 for fixed connection.

[0048] In this invention, the fixed outer sleeve 11 of the telescopic sleeve beam 1 is a rectangular steel pipe with a cross-sectional dimension of 40mm×60mm, a wall thickness of 3mm~5mm, and a length of 50cm. The movable scale inner tube 12 of the telescopic sleeve beam 1 is a rectangular steel pipe with a cross-sectional dimension of 30mm×50mm, a wall thickness of 3mm~5mm, and a length of 35cm. The outer surface of the movable scale inner tube 12 has graduations. The telescopic sleeve beam 1, in conjunction with the fasteners, controls the distance between the screw hole and the center by extending and retracting.

[0049] Both the lower and upper telescopic sleeve beams have a central circular hole 24. The central circular hole 24 of the lower telescopic sleeve beam is welded to the outer periphery of the coaxial central column 2. The central circular hole 24 of the upper telescopic sleeve beam has a larger diameter and is movably connected to the coaxial central column 2. That is, the coaxial central column 2 is actually a rotating shaft inserted into the central circular hole 24 of the upper telescopic sleeve beam. The upper telescopic sleeve beam rotates around the coaxial central column 2, and the relatively fixed lower telescopic sleeve beam rotates, controlling the angle and distance between the screw holes.

[0050] The central outer sleeve 21 of the coaxial central column 2 is a steel round tube with a diameter of 50mm, a wall thickness of 2mm to 5mm, and a length of 30cm. It is fastened to the central scale inner column 22 with fasteners. The central scale inner column 22 is a round steel tube with a diameter of 40mm and a length of 40cm. The outer wall surface is marked with scales, and the bottom is conical to facilitate the marking of the concrete pouring surface. The two are fastened together with fasteners.

[0051] The end sleeve 31 of the end adjusting column is a steel round tube with a diameter of 50mm, a wall thickness of 2mm to 5mm, and a length of 10cm. The end of the movable scale inner tube 12 has an end round hole. The end sleeve 31 passes through the end round hole and is welded to it along the edge of the hole. The end scale inner column 32 passes through the end sleeve 31. The end scale inner column 32 is a steel round tube with a diameter of 40mm and a length of 60cm. The outer wall surface is marked with graduations to determine the depth of the reserved hole. The two are fastened together by fasteners.

[0052] The fastening screw 101 of the fastener 10 is a 6mm diameter bolt with a nut, which is convenient for telescopic adjustment.

[0053] The inner foam column 4 is adjusted according to the different bolt hole diameters and lengths. A tie rod hole with a diameter of 20mm can be opened 10cm from the bottom end to insert the anti-buoyancy tie rod. After the concrete is poured, the inner foam column 4 is cleaned to form the bolt hole.

[0054] The anti-buoyancy tie rod uses a 15mm diameter steel bar, which passes through the cylindrical foam with a pin, or it can also pass through the bottom of the inner column 32 of the end scale, and is cut off after the foundation concrete is poured.

[0055] The construction process of this utility model is as follows:

[0056] Step 1: After the lower structure entity 6 is poured, tie the pad stone reinforcement mesh 8. During the construction of tying the pad stone reinforcement mesh 8, release the center point of the pad stone.

[0057] Step 2: Based on the specifications of the lower structural entity 6, adjust the length of each telescopic sleeve beam 1 of the frame and the forming angle of the upper and lower telescopic sleeve beams 1 to determine the planar position of the bolt pre-drilled holes 20.

[0058] Step 3: Adjust the height of the end adjusting column 3 within the pad stone template 7 to ensure the position of the bottom plate 33 and determine the depth of the bolt pre-drilled hole 20;

[0059] Step 4: Cut the inner mold foam column 4 according to the diameter of the bolt pre-drilled hole 20, and then insert the inner mold foam column 4 with the central opening from the bottom of the end scale inner column 32. The bottom of the inner mold foam column 4 has a tie rod hole.

[0060] Step 5: Place the entire frame with the cone tip 23 of the frame facing the center point of the pad stone. Under normal circumstances, the inner mold foam column 4 is placed directly on the upper side of the lower structural entity 6.

[0061] Step 6: Insert anti-buoyancy tie rods 5 through the lower side of the pad stone reinforcement mesh 8, pass the anti-buoyancy tie rods 5 through the tie rod holes, and then install the pad stone formwork 7;

[0062] Step 7: Adjust the length of the coaxial central column according to the position of the finished concrete surface so that the tip of the cone 23 is flush with the finished concrete surface 9.

[0063] Step 8: Pouring and curing the foundation concrete (30mm thick);

[0064] Step 9: After the concrete pad 30 is poured, clean the inner mold foam column 4, cut the anti-buoyancy tie rod 5, remove the ruler frame of this utility model, and complete the positioning of the pre-embedded bolt hole 20.

[0065] Later, the support bolts 40 with sleeves are installed through the lower support steel plate 50, and the pre-embedded bolt holes 20 are filled with filler.

Claims

1. A precision control support pre-buried bolt hole positioning pre-buried structure, characterized in that: Includes a ruler frame, which includes: The double-layer telescopic sleeve beam (1) includes a fixed outer sleeve (11) in the middle and two movable inner tubes (12) symmetrically arranged at the ends. The inner end of the movable inner tube (12) is inserted into the outer end of the fixed outer sleeve (11) and the two are horizontally adjustable. The lower fixed outer sleeve (111) and the upper fixed outer sleeve (112) are arranged vertically opposite each other at their center. A coaxial central column (2) passes through the center of the lower fixed outer sleeve (111) and is fixedly connected to it. The coaxial central column (2) passes through the center of the upper fixed outer sleeve (112) and is movably connected to it. The end adjustment column (3) passes through the outer end of each movable scale inner tube (12) and is vertically adjustable relative to the movable scale inner tube (12). Inner mold foam column (4), the inner mold foam column (4) covers and is fixed to the bottom of each end adjustment column (3), The anti-buoyancy tie rod (5) passes through the bottom of the adjacent inner mold foam column (4) at both ends.

2. The precision control of the positioning of the embedded bolt hole of the embedded structure according to claim 1, characterized in that: The overlapping position between the movable scale inner tube (12) and the fixed outer tube (11) is detachably connected by fasteners (10).

3. The precision control of the positioning of the embedded bolt hole of the embedded structure according to claim 1, characterized in that: The coaxial center column (2) includes a center outer tube (21), which passes through and is fixedly connected to the lower fixed outer tube (111), and passes through the center of the upper fixed outer tube (112) and is movably connected to it; it also includes a center scale inner column (22), the top end of which is inserted into the bottom end of the center outer tube (21), and the overlapping position of the two is detachably connected by a fastener (10), and the bottom end of the center scale inner column (22) is inverted cone shape.

4. The precision control of the positioning of the embedded bolt hole of the embedded structure according to claim 1, characterized in that: The end adjustment column (3) includes an end outer tube (31) that passes through and is fixedly connected to the inner tube (12) of the movable scale; it also includes an end scale inner column (32) that passes through the end outer tube (31), and the overlapping position of the two is detachably connected by a fastener (10).

5. The precision control of the positioning of the embedded bolt hole of the embedded structure according to claim 4, characterized in that: The inner mold foam column (4) is covered and fixed to the bottom of the inner column (32) of each end scale. The bottom end of the inner column (32) of the end scale is provided with a bottom plate (33). The bottom surface of the inner mold foam column (4) is flush with the bottom plate (33).

6. The precision control of the location of embedded bolt holes of the embedded structure according to claim 1, characterized in that: The inner mold foam column (4) is a cylindrical polyethylene foam column.

7. The positioning and pre-embedded structure for precisely controlling the pre-embedded bolt holes of the support according to any one of claims 2-4, characterized in that: The fastener (10) includes a fastening screw (101) and a fastening nut (102). The fastening nut (102) is fixedly connected to the outer wall of each outer component. The fastening screw (101) passes through the fastening nut (102) and the corresponding screw hole (103) on the outer wall and is pressed against each inner component.

8. The positioning and pre-embedded structure for precisely controlling the pre-embedded bolt holes of the support according to any one of claims 1-6, characterized in that: It also includes a lower structural entity (6) and a pad stone template (7). The ruler is set on the upper side of the lower structural entity (6) and inside the pad stone template (7). A horizontal pad stone steel mesh (8) is tied inside the pad stone template (7). The coaxial central column (2) coincides with the central axis of the pad stone. The cone tip (23) of the inner column (22) of the central ruler is located at the concrete finished surface (9) of the pad stone. The anti-buoyancy tie rod (5) is attached to the lower side of the pad stone steel mesh (8).

9. The positioning and pre-embedded structure for precisely controlling the pre-embedded bolt holes of the support according to claim 8, characterized in that: The anti-buoyancy tie rod (5) is overlapped or tied to the steel mesh of the pad stone (8) for fixed connection.

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