Prefabricated bent cap auxiliary mounting device and mounting method

Abstract

The invention discloses an auxiliary mounting device and method for a prefabricated cover beam, and belongs to the technical field of bridge reconstruction and extension construction.The auxiliary mounting device for the prefabricated cover beam comprises brackets, unloading blocks, a main bearing beam, an opposite-pulling assembly, a secondary bearing beam, a jacking piece and a prefabricated section formwork, and the brackets are mounted on the two opposite sides of a pier column; unloading blocks are mounted on the brackets; the two main bearing beams are arranged on the two opposite sides of the pier column, and each main bearing beam is erected on the two unloading blocks. The opposite-pulling assembly is used for connecting the two main bearing beams and enabling the two main bearing beams to be clamped on the pier column; the secondary bearing beams are erected on the two main bearing beams and provided with jacking pieces, and the jacking pieces can jack the prefabricated cover beams so that the two prefabricated cover beams can be sleeved with the main reinforcements of the two pier columns in a one-to-one correspondence mode. The cast-in-place section formwork is used for assisting connection of the prefabricated cover beam. The prefabricated cover beam mounting method adopts the prefabricated cover beam auxiliary mounting device. The problems of limited construction space, high cost and long construction period are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge reconstruction and expansion construction, and particularly relates to a prefabricated bent cap auxiliary installation device and installation method. BACKGROUND

[0002] With the rapid growth of urban traffic demand, reconstruction and expansion projects of existing elevated roads have become an important means to improve traffic capacity. However, such projects usually face difficulties such as piers located in the central median, limited construction space, etc. In particular, the cantilever prefabricated bent cap needs to consider both structural safety and traffic maintenance during construction due to its large size and large self-weight, further increasing the engineering difficulty.

[0003] Currently, the cantilever prefabricated bent cap construction mainly adopts the support method of setting up temporary supports, but this method needs to invest a large amount of temporary support materials, which is high in cost. At the same time, due to the occupation of the existing lane during construction, an additional maintenance road must be built to maintain traffic, which not only consumes a large amount of manpower and material resources, but also prolongs the construction period, and the economy and efficiency are not ideal.

[0004] Therefore, it is urgent to provide a prefabricated bent cap auxiliary installation device and installation method to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a prefabricated bent cap auxiliary installation device and installation method to solve the problems of limited construction space, high cost and long construction period in the prior art.

[0006] As conceived above, the technical solution adopted by the present application is:

[0007] The prefabricated bent cap auxiliary installation device is used to assist the symmetrical installation of two prefabricated bent caps on two piers arranged along a first direction, and the bottom surface of the prefabricated bent cap includes a connected inclined surface and a plane, characterized in that the prefabricated bent cap auxiliary installation device comprises:

[0008] Corbels, the corbels are installed on the opposite sides of the pier along a second direction, and the second direction is perpendicular to the first direction;

[0009] Height-adjustable unloading blocks, the unloading blocks are installed on each corbel;

[0010] Two main load-bearing beams, the main load-bearing beams are arranged on the opposite sides of the pier along the second direction, and each main load-bearing beam is arranged on two unloading blocks along the first direction;

[0011] A tension assembly for connecting two main load-bearing beams and clamping the two main load-bearing beams to the pier;

[0012] Two secondary load-bearing beams, two said pier columns are located between two said secondary load-bearing beams, each said secondary load-bearing beam is erected on two said main load-bearing beams along said second direction;

[0013] A jacking piece is arranged on each said secondary load-bearing beam, and the jacking piece can jack up the prefabricated bent cap by abutting against the inclined surface, so that two said prefabricated bent caps are correspondingly sleeved on the main reinforcement of two said pier columns through the pre-buried corrugated pipe or grouting sleeve hole arranged on the plane;

[0014] A cast-in-place section formwork is arranged around two said prefabricated bent caps to form a pouring space, and two said prefabricated bent caps form a continuous structure by pouring concrete into the pouring space.

[0015] Further, the prefabricated bent cap auxiliary installation device further comprises a connecting piece, the two opposite sides of the pier column along the second direction are provided with installation grooves, the corbel is provided with an installation hole, and the connecting piece is inserted into the installation groove through the installation hole.

[0016] Further, a plurality of said tensioning assemblies are uniformly spaced along the first direction.

[0017] Further, the tensioning assembly comprises a tensioning rod and two nuts, the tensioning rod penetrates through two said main load-bearing beams along the second direction and is locked and fixed on both sides through the nuts, so that two said main load-bearing beams are clamped on both sides of the pier column.

[0018] Further, the tensioning assembly further comprises a tensioning washer, and the tensioning washer is arranged between the nut and the main load-bearing beam.

[0019] Further, the main load-bearing beam is an H-shaped steel.

[0020] Further, the secondary load-bearing beam is a double-spliced structure composed of two H-shaped steels connected by bolts or welding.

[0021] Further, a rubber pad is clamped between the corbel and the pier column.

[0022] A prefabricated bent cap installation method adopts the prefabricated bent cap auxiliary installation device, and comprises the following steps:

[0023] S1, sequentially installing corbel on the opposite sides of two secondary load-bearing beams along the second direction, and installing unloading blocks on each corbel;

[0024] S2, sequentially erecting two main load-bearing beams on the unloading blocks on both sides of the pier column along the first direction, and connecting the two main load-bearing beams through the tensioning assembly, so that the two main load-bearing beams are clamped on the pier column;

[0025] S3, sequentially erect two secondary load-bearing beams on the two main load-bearing beams along the second direction, and install a jacking member on the two secondary load-bearing beams;

[0026] S4, sequentially hoist two prefabricated cap beams to the top of the two pier columns, and after falling a certain distance, adjust the installation height and levelness of the prefabricated cap beams by adjusting the jacking member, so that the embedded corrugated pipe or grouting sleeve hole at the bottom of the prefabricated cap beam is sleeved on the main reinforcement of the pier column;

[0027] S5, install the cast-in-place segment formwork, so that the cast-in-place segment formwork and the two prefabricated cap beams form a pouring space, and pour concrete into the pouring space.

[0028] Further, in step S2, the support point position of the bracket on the main load-bearing beam is also marked, and the bracket is installed by aligning the support point position during hoisting.

[0029] The beneficial effects of the present application are as follows:

[0030] The prefabricated cap beam auxiliary installation device provided by the present application has the following advantages: the brackets on both sides of the pier column provide a basic force point for the support system, the height-adjustable unloading block installed thereon can flexibly adapt to the support height requirement under different construction conditions, and the main load-bearing beam provides a stable and slightly adjustable support reference; the main load-bearing beam is erected on the unloading block along the first direction, the pier column is clamped by the tension assembly, a load-bearing frame is formed which is completely suspended in the existing lane, and the problem of lane occupation by temporary support is avoided, and there is no need to additionally build a passable road; the secondary load-bearing beam is arranged on the main load-bearing beam along the second direction, the jacking member thereon can accurately adjust the installation height and levelness of the prefabricated cap beam, and in combination with the height adjustment function of the unloading block, the installation precision of the prefabricated cap beam is double-protected; and the cast-in-place segment formwork ensures that the two prefabricated cap beams can be connected to form an integrated whole. The design cooperatively constructs an efficient load-bearing system through the bracket, the height-adjustable unloading block, the main load-bearing beam and the tension assembly, reduces the investment in temporary support materials, improves the installation precision and flexibility by means of the double-adjustment capability of the jacking member and the unloading block, omits the cumbersome procedures of traditional support erection and removal, thereby reducing the consumption of manpower and material resources, shortening the construction period, and effectively improving the economy and efficiency of construction.

[0031] The prefabricated cap beam installation method provided by the present application sequentially installs the bracket and the unloading block, sequentially erects the main load-bearing beam and clamps the pier column by means of the tension assembly, and then sequentially erects the load-bearing beam and installs the jacking member, so as to form a hierarchical support system, ensure the orderly force transmission of each component, and improve the overall structural stability. In the process of hoisting the prefabricated cap beam, the height and levelness can be accurately adjusted by means of the jacking member, the installation precision is ensured, and finally a continuous structure is formed by pouring through the cast-in-place segment formwork. The whole process is clear and the operation is standardized, which reduces construction interference, improves installation efficiency and safety, and adapts to the rapid and accurate construction requirement of the prefabricated cap beam. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of the prefabricated cap beam auxiliary installation device provided by the embodiment of the present application;

[0033] Figure 2 is a schematic view of installation of one of the prefabricated cap beams provided by the embodiment of the present application;

[0034] Figure 3 is a schematic view of installation of another prefabricated cap beam provided by the embodiment of the present application;

[0035] Figure 4 is a schematic view of installation of the cast-in-place segment formwork provided by the embodiment of the present application;

[0036] Figure 5 is a structural schematic view of the prefabricated cap beam installation completion and the prefabricated cap beam auxiliary installation device removal provided by the embodiment of the present application;

[0037] Figure 6 is a structural schematic view of the counter-pulling assembly provided by the embodiment of the present application;

[0038] Figure 7 is a side view of the bracket and the connecting piece provided by the embodiment of the present application;

[0039] Figure 8 is a front view of the bracket and the connecting piece provided by the embodiment of the present application;

[0040] Figure 9 is a structural schematic view of the unloading block provided by the embodiment of the present application.

[0041] In the figure:

[0042] 1, bracket;

[0043] 2, unloading block; 21, wedge-shaped steel plate; 22, wedge block seat; 23, bidirectional screw rod; 24, fastening nut;

[0044] 3, main bearing beam;

[0045] 4, counter-pulling assembly; 41, counter-pulling rod; 42, nut; 43, counter-pulling gasket;

[0046] 5, secondary bearing beam;

[0047] 6, jacking piece;

[0048] 7, cast-in-place segment formwork;

[0049] 8, connecting piece;

[0050] 9, crane;

[0051] 10, steel wire rope;

[0052] 100, prefabricated cap beam;

[0053] 200, pier; 201, main reinforcement;

[0054] 300, pile foundation;

[0055] 400, pile cap. DETAILED DESCRIPTION

[0056] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of description, only the parts related to the application are shown in the drawings, rather than all the parts.

[0057] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0059] In the description of the present embodiment, the terms "upper", "lower", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0061] As Figures 1-9As shown, the present application provides a prefabricated cap beam auxiliary installation device for assisting the symmetrical installation of two prefabricated cap beams 100 on two pier columns 200 arranged along a first direction, the bottom surface of the prefabricated cap beam 100 comprising a connected inclined surface and a flat surface, the prefabricated cap beam auxiliary installation device comprising a corbel 1, a height-adjustable unloading block 2, two main load-bearing beams 3, a tension assembly 4, two secondary load-bearing beams 5, a jacking piece 6 and a cast-in-place segment formwork 7, the pier column 200 being provided with a corbel 1 on each of the two opposite sides along a second direction, the second direction being perpendicular to the first direction; the unloading block 2 is installed on each corbel 1; the two main load-bearing beams 3 are arranged on the opposite sides of the pier column 200 along the second direction, and each main load-bearing beam 3 is arranged on the two unloading blocks 2 along the first direction; the tension assembly 4 is used to connect the two main load-bearing beams 3 and clamp the two main load-bearing beams 3 on the pier column 200; the two pier columns 200 are located between the two secondary load-bearing beams 5, and each secondary load-bearing beam 5 is arranged on the two main load-bearing beams 3 along the second direction; the jacking piece 6 is arranged on each secondary load-bearing beam 5, and the jacking piece 6 can lift the prefabricated cap beam 100 by abutting against the inclined surface, so that the two prefabricated cap beams 100 are correspondingly sleeved on the main reinforcement 201 of the two pier columns 200 through the embedded corrugated pipe or grouting sleeve hole arranged on the flat surface; the cast-in-place segment formwork 7 is arranged around the two prefabricated cap beams 100 to form a pouring space, and the two prefabricated cap beams 100 form a continuous structure by pouring concrete into the pouring space.

[0062] The corbel 1 on the two sides of the pier column 200 provides a basic force point for the support system, and the height-adjustable unloading block 2 installed thereon can flexibly adapt to the support height requirement under different construction conditions, thereby providing a stable and slightly adjustable support reference for the main load-bearing beam 3; the main load-bearing beam 3 is arranged on the unloading block 2 along the first direction, and cooperates with the tension assembly 4 to clamp the pier column 200, thereby forming a load-bearing frame completely suspended in the existing lane, which avoids the problem of occupying the lane by temporary supports, and eliminates the need for additional construction of a pass-through road; the secondary load-bearing beam 5 is arranged on the main load-bearing beam 3 along the second direction, and the jacking piece 6 thereon can accurately adjust the installation height and levelness of the prefabricated cap beam 100, thereby realizing double protection of the installation precision of the prefabricated cap beam 100 in combination with the height adjustment function of the unloading block 2; and the cast-in-place segment formwork 7 ensures that the two prefabricated cap beams 100 can be connected into one body. This design cooperatively constructs an efficient load-bearing system through the corbel 1, the adjustable unloading block 2, the main load-bearing beam 3 and the tension assembly 4, thereby reducing the investment in temporary support materials; the double adjustment capability of the jacking piece 6 and the unloading block 2 improves the installation precision and flexibility, thereby eliminating the cumbersome procedures of traditional support erection and removal, thereby reducing the consumption of manpower and material resources, shortening the construction period, and effectively improving the economy and efficiency of construction.

[0063] It should be noted that the unloading block 2 is a conventional height adjustment component in the art, and in this embodiment, as shown in Figure 9As shown, the unloading block 2 consists of two wedge-shaped steel plates 21, two symmetrically arranged wedge blocks 22, and a bidirectional screw 23: the lower wedge-shaped steel plate 21 is fixed to the corbel 1, and the main load-bearing beam 3 is placed on the upper wedge-shaped steel plate 21; the upper and lower wedge-shaped steel plates 21 are provided with matching inclined surfaces on the opposite sides, forming a sliding fit with the upper and lower inclined surfaces of the two wedge blocks 22; the two ends of the bidirectional screw 23 are penetrated by two wedge blocks 22 with opposite threads. By rotating the bidirectional screw 23, the two wedge blocks 22 are driven to move horizontally in a synchronous manner toward or away from each other along the axis of the bidirectional screw 23, and the sliding force transmission characteristics of the wedge inclined surface are used to produce an expansion or contraction effect, causing the upper and lower wedge plates 21 to undergo vertical relative displacement along the inclined surface, thereby achieving precise adjustment of the support height. After adjustment, the bidirectional screw 23 is locked by tightening the nut 24 to fix the position of the wedge blocks 22 to maintain a stable support height.

[0064] In this embodiment, the unloading block 2 has a single deadweight of 88 kg, a minimum height of 240 mm, a maximum height of 340 mm, and an adjustable height of 100 mm.

[0065] In this embodiment, the lifting member 6 is a jack. It should be noted that the jack is a hydraulic or mechanical lifting device well known in the art, and its specific structure and working principle are not described in detail here.

[0066] In this embodiment, if Figure 1 As shown, a plurality of pile foundations 300 are inserted into the ground, a cap 400 is erected on the plurality of pile foundations 300 , and two piers 200 are spaced apart along a first direction on the cap 400 .

[0067] Specifically, the main load-bearing beam 3 is an H-shaped steel. The cross-section of the H-shaped steel is in the shape of an "I", and the upper and lower flanges provide strong bending resistance, and the web enhances the shear resistance. The overall structure can effectively disperse and transfer the load of the prefabricated cap beam 100 to the unloading block 2 and the corbel 1. The flanges of the H-shaped steel are flat, and the overlap or connection with the secondary load-bearing beam 5 can be achieved by simple bolt fixing or welding, which can stably transmit the load transferred by the secondary load-bearing beam 5 and the jacking member 6 to the main load-bearing beam 3; the contact area with the wedge-shaped steel plate 21 above the unloading block 2 is large, and the force is evenly distributed, which can effectively avoid structural damage caused by local stress concentration and ensure stable force transmission between the main load-bearing beam 3 and the unloading block 2.

[0068] In this embodiment, the main load-bearing beam 3 is HN1000×300mm steel. The large 1000mm cross-sectional height gives the upper and lower flanges a strong bending section modulus, the 300mm flange width effectively disperses stress, and the web enhances shear resistance. The overall structure efficiently disperses and transfers the load of the precast cap beam 100 to the drop block 2 and corbel 1, meeting the mechanical requirements of heavy-duty structural support. This prevents the main load-bearing beam 3 from structural damage due to excessive load during the installation of the precast cap beam 100 and the construction of the cast-in-place section.

[0069] Specifically, as shown in Figures 1-4 A plurality of pairs of pulling assemblies 4 are provided, and the plurality of pairs of pulling assemblies 4 are uniformly spaced in the first direction. The plurality of pairs of pulling assemblies 4 are provided to uniformly distribute the clamping force of the two main load-bearing beams 3 on the pier column 200 at different positions of the pier column 200, so that the force transmission between the main load-bearing beam 3 and the pier column 200 is more balanced, and the support stability of the main load-bearing beam 3 is further improved.

[0070] In the present embodiment, nine pairs of pulling assemblies 4 are provided.

[0071] In other embodiments, ten pairs of pulling assemblies 4 can also be provided, and the number of pairs of pulling assemblies 4 is not specifically limited here.

[0072] Specifically, as shown in Figure 6 The pair of pulling assembly 4 includes a pulling rod 41 and two nuts 42. The pulling rod 41 penetrates the two main load-bearing beams 3 in the second direction and is locked and fixed on both sides by the nuts 42, so that the two main load-bearing beams 3 are clamped on both sides of the pier column 200. The clamping force of the single pair of pulling assembly 4 can be flexibly adjusted by the tightening degree of the nut 42.

[0073] In the present embodiment, the pulling rod 41 is a 32 mm finished rolled threaded steel bar, and the nut 42 is a M32 finished nut.

[0074] More specifically, the pair of pulling assembly 4 further includes a pulling gasket 43, which is arranged between the nut 42 and the main load-bearing beam 3. The locking force of the nut 42 can be more uniformly transmitted to the main load-bearing beam 3.

[0075] Specifically, the secondary load-bearing beam 5 is a double-pinned structure composed of two H-shaped steels connected by bolts or welding. The double-pinned H-shaped steel combination can greatly improve the bending and shear resistance of the secondary load-bearing beam 5. When bearing the load transmitted by the precast bent cap 100 through the jacking piece 6, the double-pinned structure can more evenly distribute the stress to the two steels, ensuring stable load transmission to the main load-bearing beam 3 and providing solid support for the installation of the precast bent cap 100.

[0076] In the present embodiment, the secondary load-bearing beam 5 is welded by two HN600x200mm steels. The double-pinned structure formed by welding the two HN600x200mm steels can enhance the bending and shear resistance of the secondary load-bearing beam 5. When bearing the load transmitted by the precast bent cap 100 through the jacking piece 6, the double-pinned structure can evenly distribute the stress to the two steels, so that the load is stably transmitted to the main load-bearing beam 3, and solid support is provided for the installation of the precast bent cap 100.

[0077] Specifically, as shown in Figure 1 , Figure 7 and Figure 8As shown, the prefabricated cap beam auxiliary installation device further comprises a connecting piece 8, the pier 200 is provided with a mounting groove on each of the two opposite sides in the second direction, the corbel 1 is provided with a mounting hole, and the connecting piece 8 is arranged in the mounting hole and inserted into the mounting groove. The mounting groove and the mounting hole are pre-set to provide a precise positioning reference for the installation of the connecting piece 8, and the construction personnel can complete the connection of the corbel 1 and the pier 200 through simple threading and fixing operations, without the need for complex on-site measurement and adjustment. The detachable nature of the connecting piece 8 also facilitates the later removal and recycling of the corbel 1, especially in the construction scene of the temporary support system, reduces the permanent modification to the main structure of the pier 200, and reduces the influence on the original structural performance of the pier 200.

[0078] In the embodiment, the connecting piece 8 is a 100mm pin rod.

[0079] In other embodiments, the connecting piece 8 can also be a bolt.

[0080] Specifically, a rubber pad is arranged between the corbel 1 and the pier 200. The rubber pad has a large friction coefficient on the surface, can generate sufficient friction force through close fitting with the side surface of the corbel 1 and the pier 200, effectively limits the rotation tendency of the corbel 1 around the connecting piece 8, ensures that the corbel 1 always maintains the preset installation angle and position when bearing the load, and avoids instability of the support system due to rotation.

[0081] In the embodiment, the thickness of the rubber pad is 3mm.

[0082] The application also provides a prefabricated cap beam installation method, which adopts a prefabricated cap beam auxiliary installation device, and comprises the following steps:

[0083] S1, sequentially installing corbels 1 on the two opposite sides of the two secondary load-bearing beams 5 in the second direction, and installing unloading blocks 2 on each corbel 1;

[0084] S2, sequentially arranging two main load-bearing beams 3 on the unloading blocks 2 on the two sides of the pier 200 in the first direction, and connecting the two main load-bearing beams 3 through the tension assembly 4 to clamp the two main load-bearing beams 3 to the pier 200;

[0085] S3, sequentially arranging two secondary load-bearing beams 5 on the two main load-bearing beams 3 in the second direction, and installing jacking pieces 6 on the two secondary load-bearing beams 5;

[0086] S4, sequentially hoisting two prefabricated cap beams 100 to the top of the two piers 200, adjusting the installation height and levelness of the prefabricated cap beams 100 through the jacking pieces 6 after falling a certain distance, so that the embedded corrugated pipe or grouting sleeve hole at the bottom of the prefabricated cap beam 100 is sleeved on the main reinforcement 201 of the pier 200;

[0087] S5, install the cast-in-place section formwork 7, so that the cast-in-place section formwork 7 and the two precast bent caps 100 form a pouring space, and pour concrete into the pouring space.

[0088] Wherein, step S1, step S2 and step S3 refer to Figure 1 ; step S4 refers to Figure 2 and Figure 3 , step S5 refers to Figure 4 .

[0089] By orderly installing corbels 1, unloading blocks 2, sequentially erecting main load-bearing beams 3 and clamping piers 200 by using tensioning assemblies 4, and then sequentially erecting load-bearing beams 5 and installing jacking members 6, a hierarchical support system is formed, ensuring orderly force transmission of each component and improving the overall structural stability. During the hoisting of the precast bent caps 100, the height and levelness can be accurately adjusted by the jacking members 6, ensuring the installation accuracy. Finally, the continuous structure is formed by pouring through the cast-in-place section formwork 7. The whole process is clear and the operation is standardized, reducing construction interference and improving installation efficiency and safety, which meets the rapid and accurate construction requirements of the precast bent caps 100.

[0090] More specifically, in step S2, the support point positions of the corbels 1 are marked on the main load-bearing beams 3, and the corbels 1 are installed by aligning the support point positions during hoisting. This further improves the alignment accuracy of the main load-bearing beams 3 and the unloading blocks 2, ensuring that the load of the main load-bearing beams 3 is accurately transmitted to the corbels 1, avoiding local stress concentration caused by support deviation, and enhancing the initial stability of the support system.

[0091] More specifically, in step S1, installation grooves are formed on opposite sides of the pier 200 along the second direction, and installation holes are provided on the corbel 1; the connecting piece 8 is inserted into the installation holes and inserted into the installation grooves to fix the corbel 1 to the pier 200. Through the precise cooperation of the installation grooves, installation holes and connecting pieces 8, the corbel 1 and the pier 200 are quickly positioned and fixed, without the need for complex measurement and calibration, simplifying the foundation connection process.

[0092] In this embodiment, the installation angle of the corbel 1 can be adjusted by a total station.

[0093] More specifically, in step S4, each precast bent cap 100 is hoisted to the top of the two piers 200 by the steel wire ropes 10 of the two cranes 9. The double cranes 9 hoist from different lifting points of the precast bent caps 100 through the steel wire ropes 10, forming a symmetrical or balanced force system, avoiding tilting, rotation or large shaking of the precast bent caps 100 during hoisting and translation.

[0094] More specifically, in step S5, the concrete is transported to the construction site by a concrete truck, and is poured into the mold by pumping, and during the pouring process, the concrete is vibrated and made uniform and dense at any time, and the vibration is performed by using an inserted vibrator.

[0095] As shown in Figure 5 In this embodiment, the prefabricated cap beam auxiliary installation device is removed after the concrete reaches the design strength according to the principle of "first assembly and then disassembly, and then disassembly and then assembly".

[0096] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A prefabricated cap beam auxiliary installation device, used for assisting two prefabricated cap beams (100) to be symmetrically installed on two piers (200) spaced apart along a first direction, wherein the bottom surface of the prefabricated cap beam (100) includes a connected inclined surface and a flat surface, and is characterized in that: The prefabricated cap beam auxiliary installation device includes: Corbels (1), the corbels (1) being installed on both sides of the pier (200) opposite to each other along a second direction, the second direction being perpendicular to the first direction; A height-adjustable unloading block (2), each of the brackets (1) being equipped with the unloading block (2); Two main load-bearing beams (3) are arranged on opposite sides of the pier (200) along the second direction, and each of the main load-bearing beams (3) is laid on two unloading blocks (2) along the first direction; A tensioning assembly (4) is used to connect the two main load-bearing beams (3) and clamp the two main load-bearing beams (3) to the pier (200); Two secondary load-bearing beams (5), the two piers (200) are located between the two secondary load-bearing beams (5), and each secondary load-bearing beam (5) is laid on the two main load-bearing beams (3) along the second direction; A lifting member (6), each of the secondary load-bearing beams (5) is provided with the lifting member (6), and the lifting member (6) can abut against the inclined surface and lift up the prefabricated cap beam (100), so that the two prefabricated cap beams (100) are inserted into the main reinforcement (201) of the two piers (200) in a one-to-one correspondence through the pre-buried corrugated pipe or grouting sleeve hole provided on the plane; The cast-in-situ section template (7) is enclosed with the two prefabricated cap beams (100) to form a casting space, and concrete is poured into the casting space so that the two prefabricated cap beams (100) form a continuous structure.

2. The prefabricated cap beam auxiliary installation device according to claim 1, characterized in that: The prefabricated cap beam auxiliary installation device also includes a connecting piece (8), the pier column (200) is provided with installation grooves on both sides opposite to each other along the second direction, the corbel (1) is provided with an installation hole, and the connecting piece (8) is passed through the installation hole and inserted into the installation groove.

3. The prefabricated cap beam auxiliary installation device according to claim 1, characterized in that: A plurality of the pulling components (4) are provided, and the plurality of pulling components (4) are evenly spaced along the first direction.

4. The prefabricated cap beam auxiliary installation device according to claim 1, characterized in that: The tension assembly (4) includes a tension rod (41) and two nuts (42). The tension rod (41) passes through the two main load-bearing beams (3) along the second direction and is locked and fixed on both sides by the nuts (42), so that the two main load-bearing beams (3) are clamped on both sides of the pier (200).

5. The prefabricated cap beam auxiliary installation device according to claim 4, characterized in that: The tension assembly (4) further comprises a tension washer (43), and the tension washer (43) is arranged between the nut (42) and the main load-bearing beam (3).

6. The prefabricated cap beam auxiliary installation device according to any one of claims 1 to 5, characterized in that: The main load-bearing beam (3) is an H-shaped steel.

7. The prefabricated cap beam auxiliary installation device according to any one of claims 1 to 5, characterized in that: The secondary load-bearing beam (5) is a double-joined structure formed by two H-shaped steels connected by bolts or welded in parallel.

8. The prefabricated cap beam auxiliary installation device according to any one of claims 1 to 5, characterized in that: A rubber pad is sandwiched between the corbel (1) and the pier (200).

9. The method for installing a prefabricated cap beam is characterized in that: The prefabricated cap beam auxiliary installation device according to any one of claims 1 to 8 comprises: S1, sequentially installing corbels (1) on opposite sides of two secondary load-bearing beams (5) along the second direction, and installing a drop block (2) on each corbel (1); S2, arranging the two main load-bearing beams (3) in sequence along the first direction on the unloading blocks (2) on both sides of the pier column (200), and connecting the two main load-bearing beams (3) through the tensioning assembly (4), so that the two main load-bearing beams (3) are clamped to the pier column (200); S3, arranging the two secondary load-bearing beams (5) on the two main load-bearing beams (3) in sequence along the second direction, and installing jacking members (6) on the two secondary load-bearing beams (5); S4. The two prefabricated cap beams (100) are sequentially hoisted to the tops of the two piers (200). After they have fallen a certain distance, the installation height and levelness of the prefabricated cap beams (100) are adjusted by adjusting the lifting members (6) so that the pre-buried corrugated pipes or grouting sleeve holes at the bottom of the prefabricated cap beams (100) are inserted into the main reinforcement (201) of the pier (200); S5. Install the cast-in-place section template (7) so that the cast-in-place section template (7) and the two prefabricated cap beams (100) are enclosed to form a casting space, and pour concrete into the casting space.

10. The method for installing a prefabricated cap beam according to claim 9, wherein: In step S2, it also includes: marking the support point position of the corbel (1) on the main load-bearing beam (3), and aligning the support point position for installation during hoisting.

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