Construction method for prefabricated abutment of UHPC (Ultra High Performance Concrete) connection node

Abstract

The invention belongs to the technical field of building construction, and discloses a UHPC (Ultra High Performance Concrete) connecting node prefabricated abutment construction method, which comprises the following steps: after a bearing platform is poured, hoisting a first prefabricated upright post to the bearing platform, adjusting the perpendicularity and elevation of the first prefabricated upright post, welding a first embedded part of the bearing platform and a second embedded part of the first prefabricated upright post, and fixing the first prefabricated upright post; when the joint of the bearing platform and the first prefabricated stand column is poured, the second prefabricated stand column can be hoisted to the first prefabricated stand column at the same time, hoisting of the second prefabricated stand column does not need to be conducted after the strength of concrete at the joint of the bearing platform and the first prefabricated stand column meets the requirement, the construction efficiency can be greatly improved, and the overall construction progress is shortened; and large machinery idling is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a construction method for a UHPC connection node prefabricated pier. Background Art

[0002] In bridge construction, the UHPC connection method has excellent performance of high strength and durability compared to the traditional grouting sleeve connection method, which can effectively ensure the strength and stability of the connection. It is often used to connect various components such as columns, cap beams and other structures.

[0003] However, columns or cap beams using UHPC connections lack dowel bars connecting to the lower columns, lacking effective connection stabilization measures and resistance to lateral forces. Therefore, the columns cannot be unhooked immediately after being hoisted into place. Usually, the corner reinforcement between the upper and lower columns in a circle of wet joints must be connected before unhooking to prevent the columns from tipping over after unhooking. Due to the presence of wet joints, the hoisting of the subsequent column section cannot be unhooked until the post-cast ring band concrete of the previous column section has reached a certain strength. This is usually three days after pouring. This increases the on-site construction period and prevents large machinery from operating continuously, resulting in waste. Summary of the Invention

[0004] The purpose of the present invention is to provide a UHPC connection node prefabricated pier construction method, which can improve on-site construction efficiency, shorten the construction period, and avoid idle work of large machinery.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A UHPC connection node prefabricated pier construction method is provided, comprising the following steps:

[0007] S1: tying the cap steel bars and the first embedded parts, and casting the cap;

[0008] S2: hoisting a first prefabricated column to the base, wherein a second embedded part is provided at one end of the first prefabricated column and a third embedded part is provided at the other end; adjusting the verticality and elevation of the first prefabricated column; welding the first embedded part and the second embedded part; and fixing the first prefabricated column;

[0009] S3: Casting the connection between the cap and the first precast column;

[0010] Hoisting the second prefabricated column to the first prefabricated column, with the fourth embedded part provided at one end of the second prefabricated column and the fifth embedded part provided at the other end, adjusting the verticality and elevation of the second prefabricated column, welding the third embedded part and the fourth embedded part, and fixing the second prefabricated column;

[0011] S4: Pour the joint of the first precast column and the second precast column;

[0012] Lift and install the capping beam onto the second precast column. The capping beam is provided with a sixth embedded part. Weld the fifth embedded part and the sixth embedded part, and pour the joint of the second precast column and the capping beam.

[0013] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, a mortar bedding layer is provided between the cap and the first precast column, between the first precast column and the second precast column, and between the second precast column and the capping beam.

[0014] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, adjusting components are provided on the side of the cap facing the first precast column, on the side of the first precast column facing the second precast column, and on the side of the second precast column facing the capping beam. The mortar bedding layer is arranged on the adjusting components.

[0015] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, the adjusting component includes a plurality of adjusting steel plates, and the plurality of adjusting steel plates are arranged at intervals in the circumferential direction.

[0016] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, a surrounding component is provided on the outer peripheral side of the joint between the cap and the first precast column, on the outer peripheral side of the joint between the first precast column and the second precast column, and on the outer peripheral side of the joint between the second precast column and the capping beam. The surrounding component and the corresponding joint enclose a pouring area for pouring concrete.

[0017] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, the surrounding component includes a first surrounding member and a second surrounding member respectively arranged on both sides of the joint. The first surrounding member and the second surrounding member are detachably connected.

[0018] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, the first surrounding member and the second surrounding member are connected by a haunch connection.

[0019] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, connection grooves are provided at the ends of the first precast column and the second precast column. The second embedded part, the third embedded part, the fourth embedded part, and the fifth embedded part are all arranged in the corresponding connection grooves.

[0020] As an alternative solution for the construction method of the precast pier and abutment with UHPC connection nodes, the projection of the connection groove in the vertical direction is trapezoidal.

[0021] As an alternative solution for the construction method of the precast pier of the UHPC connection node, the second embedded part, the fourth embedded part, and the fifth embedded part are all steel sections.

[0022] Advantages of the present invention:

[0023] The present invention provides a construction method for a precast pier of a UHPC connection node. After the casting of the bearing platform is completed, the first precast column is hoisted onto the bearing platform, the verticality and elevation of the first precast column are adjusted, and the first embedded part of the bearing platform is welded to the second embedded part of the first precast column to complete the fixation of the first precast column. While casting the connection part between the bearing platform and the first precast column, the second precast column can be hoisted onto the first precast column at the same time, without waiting for the concrete strength of the connection part between the bearing platform and the first precast column to meet the requirements before hoisting the second precast column, which can greatly improve the construction efficiency, shorten the overall construction progress, and effectively avoid the idling of large machinery. Description of the drawings

[0024] Figure 1 is the front view of the bearing platform provided by the embodiment of the specific implementation manner of the present invention;

[0025] Figure 2 is the front view of the first precast column provided by the embodiment of the specific implementation manner of the present invention;

[0026] Figure 3 is Figure 2 the A-A view in

[0027] Figure 4 is the first process schematic diagram of the construction method of the precast pier of the UHPC connection node provided by the embodiment of the specific implementation manner of the present invention;

[0028] Figure 5 is the front view of the connection part between the bearing platform and the first precast column provided by the embodiment of the specific implementation manner of the present invention;

[0029] Figure 6 is Figure 5 the B-B cross-sectional view in

[0030] Figure 7 is the second process schematic diagram of the construction method of the precast pier of the UHPC connection node provided by the embodiment of the specific implementation manner of the present invention;

[0031] Figure 8 is the front view of the connection part between the first precast column and the second precast column provided by the embodiment of the specific implementation manner of the present invention;

[0032] Figure 9 is the third process schematic diagram of the construction method of the precast pier of the UHPC connection node provided by the embodiment of the specific implementation manner of the present invention;

[0033] Figure 10 is Figure 9 the C-C cross-sectional view;

[0034] Figure 11 is the schematic diagram of the fourth process of the construction method of the precast pier of the UHPC connection node provided by the embodiment of the specific implementation manner of the present invention;

[0035] Figure 12 is the schematic diagram of the fifth process of the construction method of the precast pier of the UHPC connection node provided by the embodiment of the specific implementation manner of the present invention;

[0036] Figure 13 is the front view of the precast pier of the UHPC connection node provided by the embodiment of the specific implementation manner of the present invention.

[0037] In the figure:

[0038] 1, bearing platform; 11, first embedded part;

[0039] 2, first precast column; 21, second embedded part; 22, third embedded part; 23, connection groove;

[0040] 3, second precast column; 31, fourth embedded part; 32, fifth embedded part;

[0041] 4, capping beam; 41, sixth embedded part;

[0042] 5, adjusting component; 51, adjusting steel plate;

[0043] 6, enclosing component. Specific implementation manner

[0044] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0045] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right" and the like are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0049] As Figures 1 to 13 shown, this embodiment provides a construction method for a precast pier of a UHPC connection node, including the following steps:

[0050] S1: Bind the steel bars of the bearing platform 1 and the first embedded part 11, and pour the bearing platform 1.

[0051] In the above steps, specifically in this embodiment, while binding the steel bars of the bearing platform 1, bind the first embedded part 11, and then carry out concrete pouring to form Figure 1 the shown bearing platform 1.

[0052] S2: Hoist the first precast column 2 onto the bearing platform 1. A second embedded part 21 is provided at one end of the first precast column 2, and a third embedded part 22 is provided at the other end. Adjust the verticality and elevation of the first precast column 2, and weld the first embedded part 11 and the second embedded part 21 to fix the first precast column 2.

[0053] In the above steps, specifically in this embodiment, during the processing stage of the first precast column 2, bind the second embedded part 21 and the third embedded part 22 respectively at both ends of the main steel bar structure of the first precast column 2, and then pour concrete to form Figure 2 the shown first precast column 2.

[0054] Optionally, a plurality of second embedded parts 21 and third embedded parts 22 are both arranged at intervals along the circumferential direction of the first precast column 2. Specifically, in this embodiment, referring toFigure 3 There are four second embedded parts 21 provided; in other embodiments, the number of the second embedded parts 21 can be set as required and will not be specifically limited herein.

[0055] As Figure 4 shown, use an external hoisting device to hoist the first precast column 2 onto the bearing platform 1 and align the first embedded part 11 with the second embedded part 21. Adjust the verticality and elevation of the first precast column 2, and then weld the first embedded part 11 and the second embedded part 21 to achieve the preliminary fixation of the first precast column 2.

[0056] Optionally, a mortar layer is provided between the upper end surface of the bearing platform 1 and the lower end surface of the first precast column 2 to adjust the verticality and elevation of the first precast column 2 and ensure meeting the construction requirements.

[0057] Furthermore, referring to Figure 5 , an adjusting assembly 5 is provided on one side of the bearing platform 1 facing the first precast column 2, and the mortar layer is arranged on the adjusting assembly 5. On the one hand, the setting of the adjusting assembly 5 can further adjust the verticality and elevation of the first precast column 2; on the other hand, the load of the first precast column 2 is transmitted to the bearing platform 1 by the adjusting assembly 5 to effectively disperse the concentrated load of the first precast column 2 and avoid cracking of the bearing platform 1 due to excessive local stress.

[0058] Even further, the adjusting assembly 5 includes a plurality of adjusting steel plates 51. As Figure 6 shown, the plurality of adjusting steel plates 51 are arranged at intervals in the circumferential direction to facilitate flexible adjustment of the verticality and elevation of the first precast column 2. Specifically, the thickness of each adjusting steel plate 51 can be flexibly selected, or a plurality of adjusting steel plates 51 can be stacked to meet the requirements of verticality and elevation.

[0059] After the verticality and elevation of the first precast column 2 are adjusted, weld the first embedded part 11 and the second embedded part 21 to fix the first precast column 2 and ensure the stability of the first precast column 2 after the external hoisting device is unhooked.

[0060] S3: Pour the joint of the bearing platform 1 and the first precast column 2; as Figure 7 and Figure 8 shown, hoist the second precast column 3 onto the first precast column 2. A fourth embedded part 31 is provided at one end of the second precast column 3, and a fifth embedded part 32 is provided at the other end. Adjust the verticality and elevation of the second precast column 3, and weld the third embedded part 22 and the fourth embedded part 31 to fix the second precast column 3.

[0061] In the above steps, specifically in this embodiment, after the position, verticality and elevation of the first precast column 2 pass the acceptance, while pouring the joint of the bearing platform 1 and the first precast column 2, the second precast column 3 can be hoisted to shorten the construction period and improve the construction efficiency.

[0062] Optionally, referring to Figure 9 and Figure 10 , a retaining component 6 is provided on the outer peripheral side of the connection between the bearing platform 1 and the first precast column 2. The retaining component 6 and the connection enclose a pouring area. Concrete is poured into the pouring area. After the concrete in the pouring area is cured and reaches a certain strength, the retaining component 6 is removed to complete the construction of the connection.

[0063] Furthermore, the retaining component 6 includes a first retaining member and a second retaining member separately arranged on both sides of the connection, and the first retaining member and the second retaining member are detachably connected. The above equipment facilitates the installation and disassembly of the retaining component 6 and is beneficial to improving the construction efficiency. Specifically, in this embodiment, both the first retaining member and the second retaining member are standardized steel membranes.

[0064] Even further, the first retaining member and the second retaining member are connected by a huff connection, which is convenient and fast to install and has good stability.

[0065] Similarly, a mortar layer and an adjusting component 5 are provided between the upper end surface of the first precast column 2 and the lower end surface of the second precast column 3 to adjust the verticality and elevation of the second precast column 3.

[0066] After the verticality and elevation of the second precast column 3 are adjusted, the third embedded part 22 and the fourth embedded part 31 are welded to fix the second precast column 3 to ensure the stability of the second precast column 3 after the external hoisting equipment is unhooked.

[0067] S4: Pour the connection between the first precast column 2 and the second precast column 3; referring to Figure 11 , hoist the capping beam 4 to the second precast column 3. The capping beam 4 is provided with a sixth embedded part 41. Weld the fifth embedded part 32 and the sixth embedded part 41. Referring to Figure 12 , pour the connection between the second precast column 3 and the capping beam 4.

[0068] In the above steps, specifically in this embodiment, after the position, verticality and elevation of the second precast column 3 are accepted, while pouring the connection between the first precast column 2 and the second precast column 3, the capping beam 4 can be hoisted to speed up the construction process.

[0069] Similarly, a retaining component 6 is provided on the outer peripheral side of the connection between the first precast column 2 and the second precast column 3. The retaining component 6 and the connection enclose a pouring area. Concrete is poured into the pouring area to complete the construction of the connection.

[0070] While pouring the connection, use an external hoisting equipment to hoist the capping beam 4 to the second precast column 3. Similarly, a mortar layer and an adjusting component 5 are provided between the upper end surface of the second precast column 3 and the lower end surface of the capping beam 4 to adjust the verticality and elevation of the capping beam 4.

[0071] After the verticality and elevation of the capping beam 4 are adjusted, weld the fifth embedded part 32 and the sixth embedded part 41 to fix the capping beam 4, ensuring the stability of the capping beam 4 after the external lifting equipment disengages the hook.

[0072] Then, a retaining component 6 is arranged around the outer peripheral side of the connection between the second precast column 3 and the capping beam 4 to form a pouring area, and then concrete is poured into the pouring area to complete the construction of the connection. Figure 13 That is the pier and abutment after the construction is completed.

[0073] Specifically, triangular braces are arranged at the bottom sides of the retaining component 6 on the outer side of the connection between the first precast column 2 and the second precast column 3 and the retaining component 6 on the outer side of the connection between the second precast column 3 and the bearing platform 1 to provide a supporting effect on the retaining component 6 and ensure the stability of the retaining component 6.

[0074] Optionally, connection grooves 23 are arranged at the ends of both the first precast column 2 and the second precast column 3, and the second embedded part 21, the third embedded part 22, the fourth embedded part 31, and the fifth embedded part 32 are all arranged in the corresponding connection grooves 23. When the retaining component 6 is arranged around the outer peripheral side of the connection groove 23, a larger pouring area can be formed, thereby improving the connection strength of the connection.

[0075] Furthermore, the projection of the connection groove 23 in the vertical direction is trapezoidal, which can reduce stress concentration and improve the structural durability of the connection.

[0076] Optionally, the second embedded part 21, the fourth embedded part 31, and the fifth embedded part 32 are all steel sections. The I-shaped cross-sectional shape of the steel section can effectively disperse stress, improve the bending resistance, compressive resistance, and torsional resistance, and moreover, the steel section has a large moment of inertia and strong anti-deformation ability.

[0077] After the bottom precast column is initially fixed in this construction method, the next precast column can be continuously hoisted, and at the same time when the next precast column is hoisted and fixed, the connection of the previous precast column can be poured, which can greatly improve the construction efficiency and shorten the overall construction progress.

[0078] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A construction method for precast pier and abutment of UHPC connection nodes, characterized in that, It includes the following steps: S1: Bind the steel bars of the bearing platform (1) and the first embedded part (11), and pour the bearing platform (1); S2: Hoist the first precast column (2) onto the bearing platform (1). One end of the first precast column (2) is provided with a second embedded part (21), and the other end is provided with a third embedded part (22). Adjust the verticality and elevation of the first precast column (2), weld the first embedded part (11) and the second embedded part (21), and fix the first precast column (2); S3: Pour the joint between the bearing platform (1) and the first precast column (2); Hoist the second precast column (3) onto the first precast column (2). One end of the second precast column (3) is provided with a fourth embedded part (31), and the other end is provided with a fifth embedded part (32). Adjust the verticality and elevation of the second precast column (3), weld the third embedded part (22) and the fourth embedded part (31), and fix the second precast column (3); S4: Pour the joint between the first precast column (2) and the second precast column (3); Hoist the capping beam (4) onto the second precast column (3). The capping beam (4) is provided with a sixth embedded part (41), weld the fifth embedded part (32) and the sixth embedded part (41), and pour the joint between the second precast column (3) and the capping beam (4).

2. The construction method of the precast pier for the UHPC connection node according to claim 1, characterized in that, A mortar layer is provided between the bearing platform (1) and the first precast column (2), between the first precast column (2) and the second precast column (3), and between the second precast column (3) and the capping beam (4).

3. The construction method of the precast pier of the UHPC connection node according to claim 2, characterized in that, Adjusting assemblies (5) are provided on one side of the bearing platform (1) facing the first precast column (2), on one side of the first precast column (2) facing the second precast column (3), and on one side of the second precast column (3) facing the capping beam (4). The mortar layer is arranged on the adjusting assemblies (5).

4. The construction method of the precast pier for the UHPC connection node according to claim 3, characterized in that, The adjusting assembly (5) includes a plurality of adjusting steel plates (51), and the plurality of adjusting steel plates (51) are arranged at intervals in the circumferential direction.

5. The construction method of the precast pier of the UHPC connection node according to claim 1, characterized in that, Peripheral sides of the joints between the bearing platform (1) and the first precast column (2), between the first precast column (2) and the second precast column (3), and between the second precast column (3) and the capping beam (4) are all surrounded by a retaining assembly (6). The retaining assembly (6) and the corresponding joint enclose a pouring area for pouring concrete.

6. The construction method of the precast pier for the UHPC connection node according to claim 5, characterized in that, The retaining assembly (6) includes a first retaining member and a second retaining member respectively arranged on both sides of the joint. The first retaining member and the second retaining member are detachably connected.

7. The construction method of the precast pier of the UHPC connection node according to claim 6, characterized in that, The first retaining member and the second retaining member are connected by a half coupling.

8. The construction method of the precast pier of the UHPC connection node according to claim 1, characterized in that, Connection grooves (23) are provided at the ends of the first precast column (2) and the second precast column (3). The second embedded part (21), the third embedded part (22), the fourth embedded part (31), and the fifth embedded part (32) are all arranged in the corresponding connection grooves (23).

9. The construction method of the precast pier of the UHPC connection node according to claim 8, characterized in that, The projection of the connecting groove (23) in the vertical direction is trapezoidal.

10. The construction method of the precast pier of the UHPC connection node according to any one of claims 1-9, characterized in that, The second embedded part (21), the fourth embedded part (31) and the fifth embedded part (32) are all profiled steels.

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