Full assembly type bridge "horizontal division vertical rotation" rapid construction technology and equipment

Abstract

The present application relates to a kind of full assembly type bridge " horizontal division vertical rotation " quick construction process and equipment, and construction process includes the following steps: S1, vertical rotation pedestal is installed to the top surface of bearing platform;S2, hoist two precast piers, so that the pier foot of precast pier is hinged with the hinge hole of vertical rotation pedestal, until precast pier and ground cutting plane contact and mobile trolley is in position;S3, hoist horizontal division bent cap, control the inclination angle of horizontal division bent cap, and horizontal division bent cap is placed to the horizontal assembly platform, complete the pier beam consolidation operation between two pieces of horizontal division bent cap and precast pier;S4, vertical rotation tower is installed on the lower side of the pier body of precast pier, and is matched with vertical rotation cable;S5, through the tension of ground anchor, vertical rotation cable drives vertical rotation tower and horizontal division bent cap and precast pier to rotate vertically around vertical rotation pedestal, and precast pier is fastened on vertical rotation pedestal.The present application avoids cumbersome components aerial posture adjustment and accurate butt joint construction and other cumbersome procedures, reduces the use rate of large crane, improves assembly precision and efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge rapid construction, and more particularly to a full assembly type bridge "horizontal division vertical rotation" rapid construction process and equipment. BACKGROUND

[0002] Compared with the traditional cast-in-place viaduct bridge, the full assembly type bridge with integrated pier and bent cap reduces redundant procedures such as fixed formwork, large volume concrete site pouring and maintenance, and has superior construction quality and higher construction speed. The site construction is mainly component transportation and instrument hoisting, the amount of dust and noise generated during the construction process is low, the disturbance to the surrounding environment is small, and it is more suitable for application in urban complex construction conditions, such as bridge widening and existing road viaduct reconstruction projects. The full assembly type bridge technology has been used in Zhejiang and Shanghai areas first, and gradually promoted to the whole country for pilot engineering construction, and its construction technology is becoming mature. Among the various technical indicators of the assembly type bridge, the weight of the component is an important factor. Among them, the precast concrete bent cap between the bridge deck system and the precast pier has the largest single weight due to its core section design. The transportation and hoisting problems restricted by its own weight often become the key to the implementation of the design and construction of the full assembly type bridge, and even whether it can be implemented.

[0003] The current construction methods for precast assembly type bent cap include multi-section bent cap method, two-section bent cap method, steel yoke beam method, socket method, lock method, counterweight method (post-anchoring method), and layered assembly method. Due to its smaller size, the assembly type bent cap in foreign countries often uses the socket method combined with integral hoisting. Compared with foreign projects of the same type, the assembly type bent cap in China has high demand for shock absorption, large design span, and the most widely used construction process is still the two-section bent cap method. However, the actual construction feedback of the two-section bent cap method shows that the large volume formwork cast-in-place operation in the middle of the bent cap is time-consuming and labor-intensive; the temporary support structure is cumbersome to assemble and disassemble and occupies too many lanes; the adjustment of the posture of the left and right half bent caps in the air is difficult; and the precision of the pipe and steel joint in the middle of the bent cap is poor. The above factors together cause low efficiency in the construction of the assembly type bent cap, and the construction efficiency needs to be improved. The main reason is that the bent cap section is arranged in the center along the direction of the lane.

[0004] Based on the problems faced in the application of the "two-section bent cap method", the horizontally divided bent cap with integrated erection has broad application prospects, but the size of the connecting sleeve between the integrated precast bent cap and the lower pier is limited, and the verticality of the precast pier construction is not good, which will directly lead to the failure of the integrated bent cap to fall into position, seriously affecting the construction efficiency of the assembly type bridge. The construction precision requirement of the precast pier is too high, which has become the main bottleneck of the integrated bridge assembly technology. The above-mentioned precast bent cap assembly has the problems of low efficiency and high construction precision requirement of the precast pier. SUMMARY

[0005] The technical problem solved by the present application is to provide a full-assembly bridge "horizontal division vertical rotation" rapid construction process and equipment, which can consider construction efficiency and precision, reasonably integrate integrated bent caps for rapid bridge assembly, greatly improve construction efficiency, and greatly reduce traditional redundant processes such as large-volume concrete formwork pouring, in-air butt joint, prestress construction operation, and auxiliary temporary support pier operation.

[0006] The technical solution adopted by the present application to solve the technical problem is to construct a full-assembly bridge "horizontal division vertical rotation" rapid construction process, including the following steps:

[0007] S1, installing a vertical rotation base to the top surface of a bearing platform, and cutting a plane on the side of a ground pit according to the inclination angle of the bridge pier during horizontal assembly, and transporting the horizontal assembly platform to the specified position in advance;

[0008] S2, hoisting two prefabricated bridge piers, hinging the pier foot hole of the prefabricated bridge pier to the hinge hole of the vertical rotation base, and then lowering the prefabricated bridge pier until the prefabricated bridge pier is in contact with the ground cutting plane;

[0009] S3, hoisting the horizontal division bent cap, controlling the inclination angle of the horizontal division bent cap, placing the horizontal division bent cap on the horizontal assembly platform, and completing the constraint between the two horizontal division bent caps and the pier beam consolidation operation between the horizontal division bent cap and the prefabricated bridge pier;

[0010] S4, installing a vertical rotation tower on the lower side of the pier body of the prefabricated bridge pier, and matching the vertical rotation cable;

[0011] S5, through the ground anchor tension, the vertical rotation cable drives the vertical rotation tower, the horizontal division bent cap and the prefabricated bridge pier to rotate vertically around the vertical rotation base until the vertical rotation base completely matches the prefabricated bridge pier, and the prefabricated bridge pier is fastened on the vertical rotation base.

[0012] According to the above scheme, in the step S1, the vertical rotation base is installed to the top surface of the bearing platform through the embedded steel bars.

[0013] According to the above scheme, in the step S2, after the prefabricated bridge pier is in contact with the ground cutting plane, the support height of the horizontal assembly platform is adjusted.

[0014] According to the above scheme, in the step S3, the horizontal division bent cap includes a first horizontal division bent cap and a second horizontal division bent cap, and the pier beam consolidation operation between the horizontal division bent cap and the prefabricated bridge pier includes the following steps:

[0015] S301, controlling the inclination angle of the first horizontal division bent cap, placing the first horizontal division bent cap on the horizontal assembly platform, and then slowly sliding the first horizontal division bent cap along the horizontal assembly platform until the first horizontal division bent cap is in contact with the two prefabricated bridge piers at the same time.

[0016] S302, completing the abutment of the second piece of transverse split cover beam and prefabricated pier, after fastening the first piece of transverse split cover beam and the second piece of transverse split cover beam, the pier beam consolidation work between the transverse split cover beam and the prefabricated pier is completed.

[0017] According to the above scheme, the first transverse split cover beam is a left limb of the transverse split cover beam, and the second piece of transverse split cover beam is a right limb of the transverse split cover beam; the first piece of transverse split cover beam and the second piece of transverse split cover beam are symmetrically arranged and correspondingly arranged abutment pin holes.

[0018] According to the above scheme, when the first piece of transverse split cover beam and the second piece of transverse split cover beam are abutted, the bonding material is first applied on the bonding interface, after the horizontal splicing is in place, the pre-pressing and fastening in the abutment pin hole are completed through the bolt or the prestressed structure, and the cushion stone construction is carried out, forming a complete cover beam, assisting the pier beam consolidation.

[0019] According to the above scheme, in step S4, the vertical tower can rotate around the mounting point of the prefabricated pier.

[0020] According to the above scheme, in step S5, the prefabricated pier is fastened on the vertical rotation base by bolts.

[0021] The application also provides a full assembly type bridge "horizontal split vertical rotation" rapid construction equipment, which comprises a horizontal split cover beam, a prefabricated pier and a vertical rotation base; the hinge hole at the pier foot of the prefabricated pier is hingedly connected to the hinge hole of the vertical rotation base, the vertical rotation tower is arranged at the lower position of the pier body of the prefabricated pier, the vertical rotation cable is arranged at the upper position of the pier body of the prefabricated pier, the vertical rotation base is arranged on the top surface of the pile cap, and the horizontal split cover beam is arranged at the top of the prefabricated pier.

[0022] According to the above scheme, the vertical rotation base is arranged on the top surface of the pile cap through pre-embedded steel bars, the horizontal split cover beam is arranged on the horizontal splicing platform, and the horizontal splicing platform and the prefabricated pier are arranged on the ground.

[0023] The full assembly type bridge "horizontal split vertical rotation" rapid construction process and equipment of the application have the following beneficial effects:

[0024] 1. The prefabricated cover beam is cut into two parts along the horizontal bridge direction, the horizontal split cover beam and the prefabricated pier are horizontally spliced on the auxiliary site platform, and then the vertical rotation installation is integrated, so that the manufacturing and transportation are convenient, the cover beam after horizontal split has a component size similar to that of a conventional small box girder, the manufacturing, transportation and hoisting construction are more convenient, the limitations of transportation and hoisting are overcome, and the overall construction efficiency is improved.

[0025] 2, The present application is simple and convenient to assemble on site, the fine grouting sleeve connection of the transverse split bent cap and the prefabricated pier can be completed before the whole lifting with the help of the slightly inclined operation platform of the construction site, completely avoiding the cumbersome component aerial attitude adjustment and accurate butt joint construction and other tedious procedures, reducing the usage rate of large hoist, improving the assembly accuracy and efficiency;

[0026] 3, The vertical rotation construction is convenient, the vertical rotation tower is easy to disassemble and can be reused, the space of the construction site is sufficient, the vertical rotation transverse tension provided by the ground anchor gradually decreases with the rotation of the integral substructure pier beam, the high-precision grouting attitude adjustment is completely feasible, the integral structure integrated lifting in place can greatly improve the construction efficiency, and a large amount of concrete formwork pouring, aerial butt joint and prestressed construction operation, and traditional redundant procedures such as auxiliary temporary support operation are greatly reduced;

[0027] 4, The transverse split bent cap technology has strong adaptability, and the size and shape of the split section can be adjusted according to the specific engineering requirements, the vertical rotation construction technology has strong expansibility and is suitable for pier-foundation connection of various cross-sectional sizes, and can be applied to different types of buildings and bridge engineering;

[0028] 5, The transverse split bent cap is cut along the long side, which greatly reduces the site pouring operation of large-volume concrete, thereby saving the concrete age, improving the overall construction efficiency, can be directly installed on the existing double-column bent pier, without the need for construction of temporary support, greatly saving the amount of auxiliary facility engineering, and the size is close to the size of the conventional small box girder, the interval transportation and site hoisting instruments can meet the requirements, the aerial attitude adjustment of the long strip lifting component is more convenient, and the prestressed tension, beam curing and other procedures can be completed in the prefabricated beam field, which greatly improves the quality of prefabricated components while effectively saving the site prestressed installation time;

[0029] 6, The bent cap and the pier in the application are first connected in the construction site in a horizontal assembly mode, the horizontal assembly process can easily adjust the pier beam connection construction error, effectively avoid the large volume and large quality bent cap aerial operation, after the horizontal assembly bent cap-pier connection is tight, the modular tower frame cable is connected to the ground anchor, the integral vertical rotation one-time pier beam installation is in place, the construction precision is controllable, the bridge substructure construction efficiency is greatly improved, and the intelligent construction technology is also compatible, which is an effective supplement to the intelligent transformation of the construction industry to the manufacturing industry. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below in combination with the drawings and examples, and the drawings are as follows:

[0031] Figure 1 is a horizontal split horizontal assembly schematic diagram of the full assembly type bridge "horizontal split vertical rotation" rapid construction process of the application;

[0032] Figure 2This is a side view of the horizontal division and horizontal assembly of the "horizontal division and vertical rotation" rapid construction process of the fully assembled bridge of the present invention;

[0033] Figure 3 This is a front view of the horizontal division and horizontal assembly of the "horizontal division and vertical rotation" rapid construction process of the fully assembled bridge of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure placement of the "horizontally divided and vertically rotated" assembly bridge substructure construction process of the fully assembled bridge of the present invention;

[0035] Figure 5 This is a detailed structural diagram of the "horizontally divided" prefabricated cap beam of the present invention;

[0036] In the figure: 1. Horizontal cap beam, 2. Prefabricated pier, 3. Vertical rotation tower, 4. Vertical rotation base, 5. Vertical rotation cable, 6. Horizontal assembly platform, 7. Ground, 8. Top surface of pedestal, 9. Left limb of horizontal cap beam, 10. Right limb of horizontal cap beam, 11. Docking pin hole, 12. Bonding interface, 13. Pad stone. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0038] like Figures 1-5 As shown, the "horizontally divided and vertically rotated" rapid construction process of the fully assembled bridge of the present invention has a main structure consisting of a horizontally divided cap beam 1 and prefabricated bridge piers 2, and includes the following steps:

[0039] S1. Before the horizontal cap beam 1 and the prefabricated bridge pier 2 are hoisted to the construction site, the vertical rotation base 4 is first installed on the top surface 8 of the pedestal by pre-embedded steel bars, and a certain plane is cut in advance on the side of the pit 7 according to the inclination angle of the bridge pier when horizontally assembled, and the bridge pier is transported to the designated position on the horizontal assembly platform 6 in advance;

[0040] S2. The formal construction begins. First, slightly adjust the tilt angle and lift the two prefabricated piers 2 so that the reaming holes at the pier feet of the prefabricated piers 2 are firmly hinged with the reaming holes of the vertical rotation base 4. Then slowly lower the prefabricated piers 2 until the prefabricated piers 2 are in contact with the cutting plane of the ground 7. Then adjust the supporting height of the horizontal platform 6. After the above three points of contact are completed, remove the lifting rope.

[0041] S3, hoisting the transverse cap beam 1, controlling the inclination angle of the transverse cap beam 1, placing the transverse cap beam 1 on the horizontal assembly platform 6, completing the constraint between the two transverse cap beams 1 and the pier-beam consolidation operation between the two transverse cap beams 1 and the prefabricated bridge piers 2, specifically including the following steps:

[0042] S301, control the inclination angle of the first piece of transverse cover beam, place the first piece of transverse cover beam on the laying platform 6, then slowly slide the first piece of transverse cover beam along the laying platform 6 until the first piece of transverse cover beam is connected with the two precast pier embedded steel bar holes at the same time;

[0043] S302, complete the butt joint of the second piece of transverse cover beam and the precast pier 2, fasten the first piece of transverse cover beam and the second piece of transverse cover beam, and then complete the pier beam consolidation work between the transverse cover beam 1 and the precast pier 2.

[0044] The transverse cover beam 1 includes a first piece of transverse cover beam and a second piece of transverse cover beam; the first piece of transverse cover beam is a left limb 9 of the transverse cover beam, and the second piece of transverse cover beam is a right limb 10 of the transverse cover beam; the first piece of transverse cover beam and the second piece of transverse cover beam are symmetrically arranged and correspondingly arranged with butt joint pin holes 11; when the first piece of transverse cover beam and the second piece of transverse cover beam are connected, first, the bonding material is applied on the bonding interface 12, then, after the laying is in place, the pre-pressing and fastening are completed in the butt joint pin holes 11 through bolts or prestressed structures, and the cushion stone 13 construction is carried out to form a complete cover beam and assist the pier beam consolidation. Hoisting the transverse cover beam 1: control the inclination angle of the first piece of transverse cover beam, first, place the first piece of transverse cover beam on the laying platform 6, then slowly slide the first piece of transverse cover beam along the laying platform 6 until the first piece of transverse cover beam is connected with the two precast pier 2 embedded steel bar holes at the same time, sequentially complete the butt joint of the second piece of transverse cover beam and the precast pier 2, fasten the two pieces of transverse cover beam, and then complete the pier beam consolidation work between the transverse cover beam 1 and the precast pier 2.

[0045] S4, install the vertical rotation tower 3 at the lower side of the pier body of the precast pier 2 and match the vertical rotation cable 5; the vertical rotation tower 3 can rotate around the installation point of the precast pier 2;

[0046] After the transverse cover beam 1 and the precast pier 2 become one, install the vertical rotation tower 3 at the lower side of the pier body of the precast pier 2, the vertical rotation tower 3 can rotate around the installation point, and then match the vertical rotation cable 5.

[0047] S5, through the ground anchor tension, the vertical rotation cable 5 drives the vertical rotation tower 3, the transverse cover beam 1 and the precast pier 2 to rotate vertically around the vertical rotation base 4 until the vertical rotation base 4 completely matches the precast pier 2, and the precast pier 2 is fastened on the vertical rotation base 4. Install fastening bolts at the matching position, slightly adjust the posture, and then fasten the precast pier 2 on the vertical rotation base 4 by using the bolts.

[0048] S6, after the vertical rotation construction is completed, the vertical rotation tower 3 and the vertical rotation cable 5 can be removed together with the laying platform 6 and transported to the next work station for circulation.

[0049] The application also provides a full-assembled bridge "horizontal division vertical rotation" rapid construction equipment, which comprises horizontal division bent caps 1, prefabricated piers 2 and vertical rotation bases 4; the pier foot of the prefabricated pier 2 is hingedly connected with the hinge hole of the vertical rotation base 4, the lower position of the pier body of the prefabricated pier 2 is provided with a vertical rotation tower 3, the upper position of the pier body of the prefabricated pier 2 is provided with vertical rotation cables 5, the vertical rotation base 4 is arranged on the top surface 8 of the bearing platform, the top of the prefabricated pier 2 is provided with the horizontal division bent cap 1, the vertical rotation base 4 is arranged on the top surface 8 of the bearing platform through pre-embedded steel bars, the horizontal division bent cap 1 is arranged on the lying assembly platform 6, and the lying assembly platform 6 and the prefabricated pier 2 are arranged on the ground 7.

[0050] The working principle of the application is as follows:

[0051] The "horizontal division vertical rotation" rapid construction process of the full-assembled bridge utilizes the skill of vertical rotation construction, in which a great horizontal tension is provided by a ground anchor, but the force arm length of the ground anchor point from the rotation point is not enough, so a temporary tower is used to increase the active force arm, which is helpful to rotate the structure by using smaller tension. With the rotation, the active force arm gradually decreases, but the structure dumping moment also greatly decreases, so the ground anchor force in the vertical rotation construction will be smaller and smaller, which is the mechanical balance principle used in the vertical rotation construction.

[0052] In the preferred embodiment of the application, the "horizontal division vertical rotation" rapid construction process of the full-assembled bridge can be realized by other forms or combined bent cap cutting processes, and the application reserves the right to realize the combined form of the horizontal division of the bent cap; the interface bonding and pin hole butt joint process between the segmented bent caps of the "horizontal division method" can be realized by other forms or combined structures and devices, and the application reserves the right to realize the assembly method; the "horizontal division vertical rotation" rapid construction process of the full-assembled bridge can be realized by other rotating body construction processes, and the application reserves the right to combine and expand the method of integrally positioning the pier beam lower structure of the lying assembled bridge; the "horizontal division method" of the large-volume prefabricated bent cap segmentation method in the application, which is cut in half along the transverse bridge direction perpendicular to the lane, is combined with the lying assembly of the hoisting platform site, and after the integrated pier beam connection, the new type of bridge rapid construction process is installed by vertical rotation with the aid of the bearing platform, which also involves the research and development of the construction auxiliary equipment.

[0053] The embodiments of the application are described above in combination with the drawings, but the application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, which all belong to the protection of the application.

Claims

1. A "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge, characterized by: The following steps are involved: S1. Install the vertical rotation base to the top surface of the pier, and cut a plane in advance on the side of the ground pit according to the inclination angle of the pier during horizontal assembly, and transport it to the designated position on the horizontal assembly platform in advance; S2. Lift the two prefabricated bridge piers so that the reaming holes at the pier feet of the prefabricated bridge piers are hinged to the reaming holes on the vertical rotation base. Then, lower the prefabricated bridge piers until they contact the ground cutting plane. S3: Hoist the transverse cap beam, control its inclination angle, place it on the horizontal assembly platform, and complete the constraints between the two transverse cap beams and the consolidation of the beams and the precast piers. In step S3, the transverse cap beam includes a first transverse cap beam and a second transverse cap beam, and completing the pier-beam consolidation operation between the transverse cap beam and the prefabricated pier includes the following steps: S301: Control the inclination angle of the first transverse cap beam, place the first transverse cap beam on the horizontal assembly platform, and then slowly lower the first transverse cap beam along the horizontal assembly platform until the first transverse cap beam is simultaneously connected to the embedded steel bar holes of the two prefabricated piers; S302: After the second transverse cap beam and the prefabricated bridge pier are connected, the first transverse cap beam and the second transverse cap beam are fastened oppositely, and the pier-beam consolidation operation between the transverse cap beam and the prefabricated bridge pier is completed; S4. Install a vertical rotation tower on the underside of the prefabricated pier and match it with vertical rotation cables; S5. Through the tension of the ground anchor, the vertical rotation cable drives the vertical rotation tower, the horizontal cap beam and the prefabricated bridge pier to rotate vertically around the hinge at the vertical rotation base until the vertical rotation base is completely fitted with the prefabricated bridge pier, and the prefabricated bridge pier is fastened to the vertical rotation base.

2. The "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge according to claim 1 is characterized in that: In step S1, the vertical rotation base is installed on the top surface of the pedestal by pre-embedded steel bars.

3. The "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge according to claim 1 is characterized in that: In step S2, after the prefabricated bridge pier contacts the ground cutting plane, the support height of the horizontal assembly platform is adjusted.

4. The "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge according to claim 1 is characterized in that: The first transverse cap beam is the left limb of the transverse cap beam, and the second transverse cap beam is the right limb of the transverse cap beam; the first transverse cap beam and the second transverse cap beam are symmetrically arranged and have corresponding docking pin holes.

5. The "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge according to claim 4 is characterized in that: When the first transverse cap beam and the second transverse cap beam are butt-jointed, adhesive material is first applied to the bonding interface. After they are laid horizontally in place, pre-compression and tightening are completed in the butt pin holes through bolts or prestressed structures, and paving stone construction is carried out to form a complete cap beam and assist in consolidating the pier beam.

6. The "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge according to claim 1 is characterized in that: In step S4, the vertical tower can rotate around the installation point of the prefabricated bridge pier.

7. The "horizontal division and vertical rotation" rapid construction process for a fully assembled bridge according to claim 1 is characterized in that: In step S5, the prefabricated bridge pier is fastened to the vertical rotation base by using bolts.

8. A fully assembled bridge "horizontally divided and vertically rotated" rapid construction equipment, characterized by: It includes a transverse cap beam, a prefabricated bridge pier and a vertical rotation base; the reamed holes at the pier feet of the prefabricated bridge pier are firmly hinged to the reamed holes of the vertical rotation base, a vertical rotation tower is provided at the lower position of the pier body of the prefabricated bridge pier, a vertical rotation cable is provided at the upper position of the pier body of the prefabricated bridge pier, the vertical rotation base is provided on the top surface of the pedestal, and a transverse cap beam is provided on the top of the prefabricated bridge pier.

9. The "horizontal division and vertical rotation" rapid construction equipment for a fully assembled bridge according to claim 8 is characterized in that: The vertical rotation base is arranged on the top surface of the pedestal through pre-embedded steel bars, the horizontal cap beam is arranged on the horizontal assembly platform, and the horizontal assembly platform and the prefabricated bridge pier are both arranged on the ground.

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