A positioning system and method for hoisting construction of steel cage for elevated bridge piers

Abstract

The present invention discloses a positioning system and method for the hoisting construction of a steel cage for an elevated bridge pier, and relates to the technical field of bridge pier construction. The system uses a pier steel cage plane positioning device to perform plane positioning on the bottom of the pier steel cage, a pier steel cage elevation adjustment device to adjust the elevation of the pier steel cage, and a pier steel cage verticality control device to adjust the verticality of the pier steel cage. In actual application, the present invention has obvious advantages over traditional on-site overall installation and positioning construction of piers. The movable concrete anchor block can be reused many times, the construction process is simple, the applicability is strong, and the installation and disassembly are convenient. The system can effectively speed up the construction progress and save labor, material and machinery costs. At the same time, it is easier to ensure the construction quality and construction safety of the steel cage than the traditional pier steel cage positioning.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge pier construction, and in particular to a positioning system and method for hoisting and constructing a steel cage for an elevated bridge pier. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] At present, there are generally two ways to position the reinforcement cage of bridge piers. One is to use guy ropes to directly fix it on the surrounding structures and temporarily excavate and pour the concrete foundation. The other is to install anchor rods around the pedestal as temporary ground anchors, and then carry out the overall positioning construction of the pier reinforcement cage. However, these two methods are not conducive to the turnover and reuse of on-site materials, and the installation of anchor rods around the pedestal has high geological requirements. The construction and removal steps of the anchor rods are too complicated, which consumes a lot of manpower, has a long construction period, and is generally difficult to construct. During the construction process, the plane position, elevation, verticality and protective layer thickness of the pier reinforcement cage cannot be well controlled, which affects the construction quality of the pier and the progress of the project. Summary of the Invention

[0004] The purpose of the present invention is to provide a positioning system and method for the hoisting construction of the steel cage of the pier of the viaduct, which is suitable for the positioning process of the overall hoisting construction of the steel cage of the single-column and double-column vase pier of the viaduct, can complete the positioning operation simply and efficiently, greatly improve its construction efficiency and safety performance, shorten the construction period, and thus solve the above problems.

[0005] The technical solutions of the present invention are as follows:

[0006] A positioning system for hoisting and constructing a steel cage for an elevated bridge pier column, comprising: a plane positioning device for the pier column steel cage, a height adjustment device for the pier column steel cage, and a verticality control device for the pier column steel cage; preferably, the plane positioning device for the pier column steel cage is used to plane-position the pier column steel cage, i.e., to position the pier column steel cage to a specified plane; the height adjustment device for the pier column steel cage is used to adjust the height of the pier column steel cage; and the verticality control device for the pier column steel cage is used to adjust the verticality of the pier column steel cage.

[0007] The pier column reinforcement cage plane positioning device comprises:

[0008] Positioning hoop, the positioning hoop is fixed on the main reinforcement of the pedestal; the bottom of the pier column reinforcement cage is inserted into the positioning hoop and connected to the bottom of the main reinforcement of the pedestal, and the positioning hoop is used to plane position the bottom of the pier column reinforcement cage; Figure 5 As shown;

[0009] The pier column reinforcement cage elevation adjustment device comprises:

[0010] Auxiliary reinforcement, one end of the auxiliary reinforcement is connected to the bottom of the pier column reinforcement cage, and the other end of the auxiliary reinforcement is inserted into the positioning hoop along with the bottom of the pier column reinforcement cage and connected to the bottom of the main reinforcement of the pedestal, and the pier column reinforcement cage is adjusted in elevation by the auxiliary reinforcement; further, the auxiliary reinforcement is cut in advance and placed in the pedestal reinforcement, and after the positioning hoop is inserted into the bottom of the pier column reinforcement cage and the insertion length is adjusted, one end of the auxiliary reinforcement is connected to the pier column reinforcement cage and the other end is connected to the bottom of the main reinforcement of the pedestal, and the pier column reinforcement cage is supported and fixed in elevation by the auxiliary reinforcement; preferably, the number of auxiliary reinforcements (3) on one side of the bottom of the pier column reinforcement cage (1) is 4-6; the model of the auxiliary reinforcement is the same as the model of the main reinforcement of the pier column reinforcement cage, which is HRB400Φ28;

[0011] The pier column reinforcement cage verticality control device includes:

[0012] A movable concrete anchor block and a positioning guy rope, one end of the positioning guy rope is connected to the upper part of the pier column reinforcement cage, and the other end of the positioning guy rope is connected to the movable concrete anchor block. The deadweight of the movable concrete anchor block offsets the tension on the upper part of the pier column reinforcement cage, and the verticality of the pier column reinforcement cage is adjusted; preferably, the positioning guy rope is a steel wire rope with a diameter of 9.3mm, which is used to keep the pier column reinforcement cage upright and stable.

[0013] Furthermore, the steel bar type used in the positioning hoop is consistent with the stirrup type used in the pier column reinforcement cage; preferably, the steel bar type used in the positioning hoop is the same as the stirrup type used in the pier column reinforcement cage, and both are HRB400Φ16;

[0014] The plane size of the positioning hoop is consistent with the cross-sectional size of the bottom of the pier column steel cage, so that the bottom of the pier column steel cage is in close contact with the inner surface of the positioning hoop, ensuring that the bottom of the pier column steel cage is positioned in a specified plane; preferably, the plane size of the positioning hoop is the same as the cross-sectional size of the bottom of the pier column steel cage, and both are 1.6*1.7m.

[0015] Furthermore, the length of the auxiliary reinforcement is greater than the distance between the bottom of the main reinforcement of the pier cap and the bottom of the pier column reinforcement cage, ensuring that when the pier column reinforcement cage is at a specified elevation, the auxiliary reinforcement can be connected to the bottom of the main reinforcement of the pier cap, thereby dispersing the weight of the pier column reinforcement cage and preventing local sinking; preferably, the length of the auxiliary reinforcement is 20 cm longer than the distance between the bottom of the main reinforcement of the pier cap and the bottom of the pier column reinforcement cage; the auxiliary reinforcement is cut in advance and placed in the pier cap reinforcement, and after the positioning hoop is inserted into the bottom of the pier column reinforcement cage and the insertion length is adjusted, one end of the auxiliary reinforcement is connected to the pier column reinforcement cage by a lap weld of not less than 20 cm, and the other end is connected to the bottom of the main reinforcement of the pier cap;

[0016] One end of the auxiliary reinforcement is anchored into the bottom of the main reinforcement of the pedestal together with the bottom of the pier column reinforcement cage.

[0017] Furthermore, the movable concrete anchor block includes:

[0018] Arc lifting lugs and concrete anchor blocks; the arc lifting lugs are arranged on the concrete anchor blocks and are used to connect with the positioning guy ropes; wherein the concrete anchor blocks are equivalent to ground anchors, and their own weight is used to offset the tension on the upper part of the pier column reinforcement cage.

[0019] Furthermore, the arc lifting ear and the positioning guy rope are connected by a basket bolt, and the verticality of the pier column reinforcement cage is fine-tuned by the basket bolt; wherein, the basket bolt uses its screw rod to extend and retract, thereby adjusting the tightness of the guy rope and fine-tuning the verticality of the pier column reinforcement cage; the positioning guy rope and the movable concrete anchor block together constitute the stabilization system of the pier column reinforcement cage, and the existence of the positioning guy rope is directly related to the construction safety of subsequent operations; therefore, in order to avoid large deviations in the plane positioning, elevation adjustment and verticality control of the viaduct pier reinforcement cage, the stable structure composed of the movable concrete anchor block, the basket bolt and the positioning guy rope ensures the accuracy of the overall lifting and positioning of the viaduct pier reinforcement cage.

[0020] Furthermore, the concrete anchor block is composed of C20 concrete and internal steel bars, and the arc lifting ears are tied and fixed to the internal steel bars of the concrete anchor block; preferably, the internal steel bars include: four layers of HRB400Φ16 steel bars located inside the concrete anchor block; the model of the arc lifting ears is HPB300Φ20; there are two arc lifting ears on the concrete anchor block; that is, the two arc lifting ears are tied and fixed to the four layers of HRB400Φ16 steel bars inside the concrete anchor block, and the arc lifting ears are pre-buried in the concrete anchor block.

[0021] Furthermore, the size of the concrete anchor block is 1.0*1.0*1.2m.

[0022] A positioning method for hoisting and installing a steel cage for an elevated bridge pier comprises the following steps:

[0023] Step S1: Measure and lay out the bottom plane position of the pier column reinforcement cage on the main reinforcement of the cap in advance, and weld the positioning hoop to the main reinforcement of the cap at the plane position;

[0024] Step S2: Weld 4-6 auxiliary bars on one side of the bottom of the pier column reinforcement cage to facilitate control of the elevation of the pier column reinforcement cage. Preferably, the auxiliary bars are cut in advance according to the number of 4-6 auxiliary bars on one side of the bottom of the pier column reinforcement cage and the overlap length is not less than 20 cm, and are placed in the base steel bar in advance to facilitate control of the elevation of the pier column reinforcement cage.

[0025] Step S3: connect one end of the auxiliary reinforcement to the bottom of the pier column reinforcement cage and make a lap weld of no less than 20 cm, and connect the other end to the main reinforcement of the bottom layer of the pedestal, so as to disperse the weight of the pier column reinforcement cage (1) and play a role in fixing the elevation; preferably, insert the bottom of the pier column reinforcement cage 1 into the main reinforcement of the pedestal, and after adjusting the elevation, use 4-6 auxiliary reinforcements to connect the bottom of the pier column reinforcement cage, so as to support the pier column reinforcement cage and fix the elevation; thereby preventing local sinking of the cushion layer;

[0026] Step S4: Place the movable concrete anchor block at the preset position, connect one end of the positioning guy rope to the upper part of the pier column reinforcement cage, and connect the other end to the arc lug on the movable concrete anchor block through a basket bolt, and fine-tune the verticality of the pier column reinforcement cage through the basket bolt.

[0027] Furthermore, in step S4, it should be ensured that the angle between the positioning guy rope and the ground does not exceed 45°.

[0028] Compared with the existing technology, the beneficial effects of the present invention are:

[0029] A positioning system and method for the hoisting construction of a steel cage for an elevated bridge pier. The system uses a pier steel cage plane positioning device to perform plane positioning on the bottom of the pier steel cage, a pier steel cage elevation adjustment device to adjust the elevation of the pier steel cage, and a pier steel cage verticality control device to adjust the verticality of the pier steel cage. In actual application, the system has obvious advantages over traditional on-site overall installation and positioning construction of piers. The movable concrete anchor blocks can be reused many times, the construction process is simple, the applicability is strong, and installation and disassembly are easy. The system can effectively speed up the construction progress and save labor, material and machinery costs. At the same time, it is easier to ensure the construction quality and construction safety of the steel cage than traditional pier steel cage positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an elevation drawing of a positioning system used for the integral hoisting construction of a steel cage for a single-column vase pier on an elevated bridge.

[0031] Figure 2 This is a plan view of a positioning system used for the overall hoisting construction of a steel cage for a single-column vase pier on an elevated bridge.

[0032] Figure 3 This is an elevation drawing of a positioning system used for the integral hoisting construction of a steel cage for the double-column vase piers of an elevated bridge;

[0033] Figure 4 This is a plan view of a positioning system used for the overall hoisting construction of the reinforcement cage of the double-column vase pier of an elevated bridge;

[0034] Figure 5 It is the plan view of the positioning hoop;

[0035] Figure 6 This is a cross-sectional view of a movable concrete anchor block.

[0036] Figure numerals: 1- pier column reinforcement cage, 2- pedestal, 3- auxiliary reinforcement, 4- movable concrete anchor block, 5- positioning guy rope, 6- steel sheet pile, 7- pedestal formwork, 21- positioning hoop, 41- arc lifting ear, 42- concrete anchor block, 51- basket bolt. DETAILED DESCRIPTION

[0037] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0038] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0039] Example 1

[0040] At present, there are generally two ways to position the reinforcement cage of bridge piers. One is to use guy ropes to directly fix it on the surrounding structures and temporarily excavate and pour the concrete foundation. The other is to install anchor rods around the pedestal as temporary ground anchors, and then carry out the overall positioning construction of the pier reinforcement cage. However, these two methods are not conducive to the turnover and reuse of on-site materials, and the installation of anchor rods around the pedestal has high geological requirements. The construction and removal steps of the anchor rods are too complicated, which consumes a lot of manpower, has a long construction period, and is generally difficult to construct. During the construction process, the plane position, elevation, verticality and protective layer thickness of the pier reinforcement cage cannot be well controlled, which affects the construction quality of the pier and the progress of the project.

[0041] In view of the above problems, this embodiment proposes a positioning system and method for the hoisting construction of steel cages for viaduct piers, which is suitable for the positioning process of the overall hoisting construction of steel cages for single and double column vase piers of viaducts. Figure 1 Figure 3 As shown, it can complete the positioning operation simply and efficiently, greatly improve its construction efficiency and safety performance, and shorten the construction period.

[0042] See also Figure 1-6 , a positioning system for the hoisting construction of a viaduct pier steel cage, comprising: a pier steel cage plane positioning device, a pier steel cage elevation adjustment device, and a pier steel cage verticality control device;

[0043] Preferably, the pier column reinforcement cage plane positioning device is used for plane positioning of the pier column reinforcement cage 1, that is, positioning the pier column reinforcement cage 1 to a specified plane; the pier column reinforcement cage elevation adjustment device is used for adjusting the elevation of the pier column reinforcement cage 1; the pier column reinforcement cage verticality control device is used for adjusting the verticality of the pier column reinforcement cage 1;

[0044] In this embodiment, specifically, the pier column reinforcement cage plane positioning device includes:

[0045] Positioning hoop 21, the positioning hoop 21 is fixed on the main reinforcement of the platform 2; the bottom of the pier column reinforcement cage 1 is inserted into the positioning hoop 21 and connected to the bottom of the main reinforcement of the platform 2, and the positioning hoop 21 is used to plane position the bottom of the pier column reinforcement cage 1; Figure 5 As shown;

[0046] The pier column reinforcement cage elevation adjustment device comprises:

[0047] Auxiliary reinforcement 3, one end of the auxiliary reinforcement 3 is connected to the bottom of the pier column reinforcement cage 1, and the other end of the auxiliary reinforcement 3 is inserted into the positioning hoop 21 along with the bottom of the pier column reinforcement cage 1 and connected to the bottom of the main reinforcement of the platform 2, and the auxiliary reinforcement 3 is used to adjust the elevation of the pier column reinforcement cage 1; preferably, the auxiliary reinforcement 3 needs to be cut in advance according to the insertion length of the pier column reinforcement cage 1 and the lap welding length of not less than 20 cm and placed in the reinforcement of the platform 2. After the pier column reinforcement cage 1 is inserted into the positioning hoop 21 and the insertion length is adjusted, one end of the auxiliary reinforcement 3 is connected to the bottom of the pier column reinforcement cage 1 and a lap welding of not less than 20 cm is performed, and the other end is connected to the main reinforcement at the bottom of the platform 2, thereby dispersing the weight of the pier column reinforcement cage 1 and playing a role in fixing the elevation;

[0048] The number of auxiliary bars (3) on one side of the bottom of the pier column reinforcement cage (1) is 4-6; the model of the auxiliary bars 3 is the same as the model of the main bars of the pier column reinforcement cage 1, which is HRB400Φ28;

[0049] The pier column reinforcement cage verticality control device comprises:

[0050] A movable concrete anchor block 4 and a positioning guy rope 5, one end of the positioning guy rope 5 is connected to the upper part of the pier column reinforcement cage 1, and the other end of the positioning guy rope 5 is connected to the movable concrete anchor block 4. The deadweight of the movable concrete anchor block 4 offsets the upper tension of the pier column reinforcement cage 1, and adjusts the verticality of the pier column reinforcement cage 1; preferably, the positioning guy rope 5 is a steel wire rope with a diameter of 9.3 mm, which is used to keep the pier column reinforcement cage 1 upright and stable.

[0051] In this embodiment, specifically, the steel bar type used in the positioning hoop 21 is consistent with the stirrup type used in the pier column reinforcement cage 1; preferably, the steel bar type used in the positioning hoop 21 is the same as the stirrup type used in the pier column reinforcement cage 1, and both are HRB400Φ16;

[0052] The plane size of the positioning hoop 21 is consistent with the cross-sectional size of the bottom of the pier column reinforcement cage 1, so that the bottom of the pier column reinforcement cage 1 is in close contact with the inner surface of the positioning hoop 21, ensuring that the bottom of the pier column reinforcement cage 1 is positioned in a specified plane; preferably, the plane size of the positioning hoop 21 is the same as the cross-sectional size of the bottom of the pier column reinforcement cage 1, and both are 1.6*1.7m.

[0053] In this embodiment, specifically, the length of the auxiliary reinforcement 3 is greater than the distance between the bottom of the main reinforcement of the cap 2 and the bottom of the pier column reinforcement cage 1, ensuring that when the pier column reinforcement cage 1 is at a specified elevation, the auxiliary reinforcement 3 can be connected to the bottom of the main reinforcement of the cap 2, thereby supporting the pier column reinforcement cage 1 and fixing the elevation; thereby preventing local sinking of the cushion layer;

[0054] Preferably, the length of the auxiliary reinforcement 3 is 20 cm longer than the distance between the bottom of the main reinforcement of the pedestal 2 and the bottom of the pier column reinforcement cage 1; one end of the auxiliary reinforcement 3 is anchored into the bottom of the main reinforcement of the pedestal 2 together with the bottom of the pier column reinforcement cage 1.

[0055] In this embodiment, specifically, the movable concrete anchor block 4 includes:

[0056] Arc ear 41 and concrete anchor block 42; the arc ear 41 is set on the concrete anchor block 42, for connecting with the positioning guy rope 5; wherein the concrete anchor block 42 is equivalent to a ground anchor, using its own weight to offset the upper tension of the pier column reinforcement cage 1.

[0057] In this embodiment, specifically, the arc lifting lug 41 is connected to the positioning guy rope 5 via a turnbuckle 51, and the verticality of the pier column reinforcement cage 1 is fine-tuned via the turnbuckle 51;

[0058] Among them, the basket bolt 51 uses its screw rod to extend and retract, thereby adjusting the tightness of the guy rope and fine-tuning the verticality of the pier column reinforcement cage 1; the positioning guy rope 5 and the movable concrete anchor block 4 together constitute the stabilization system of the pier column reinforcement cage 1, and the existence of the positioning guy rope 5 is directly related to the construction safety of subsequent operations; therefore, in order to avoid large deviations in the plane positioning, elevation adjustment and verticality control of the viaduct pier reinforcement cage, the stable structure composed of the movable concrete anchor block 4, the basket bolt 51 and the positioning guy rope 5 ensures the accuracy of the overall lifting and positioning of the viaduct pier reinforcement cage 1.

[0059] In this embodiment, specifically, the concrete anchor block 42 is composed of C20 concrete and internal steel bars, and the arc hanging ear 41 is tied and fixed to the internal steel bars of the concrete anchor block 42;

[0060] Preferably, the internal steel bars include: four layers of HRB400Φ16 steel bars located inside the concrete anchor block 42; the model of the arc lifting ear 41 is HPB300Φ20; there are two arc lifting ears 41 on the concrete anchor block 42; that is, the two arc lifting ears 41 are tied and fixed to the four layers of HRB400Φ16 steel bars inside the concrete anchor block 42, and the arc lifting ears 41 are pre-buried in the concrete anchor block 42.

[0061] In this embodiment, specifically, the size of the concrete anchor block 42 is 1.0*1.0*1.2 m.

[0062] In this embodiment, in accordance with the above-mentioned positioning system for hoisting and installing a steel cage for a viaduct pier column, a positioning method for hoisting and installing a steel cage for a viaduct pier column is also proposed, which specifically includes the following steps:

[0063] Step S1: Measure and lay out the bottom plane position of the pier column reinforcement cage 1 on the main reinforcement of the pedestal 2 in advance, and weld the positioning hoop 21 to the main reinforcement of the pedestal 2 at the plane position;

[0064] Step S2: Weld 4-6 auxiliary bars 3 on one side of the bottom of the pier column reinforcement cage 1 to facilitate controlling the elevation of the pier column reinforcement cage 1;

[0065] Step S3: Connect one end of the auxiliary reinforcement 3 to the bottom of the pier column reinforcement cage 1 and make a lap weld of no less than 20 cm, and connect the other end to the main reinforcement of the bottom layer of the cap 2, thereby distributing the weight of the pier column reinforcement cage 1 and playing the role of fixing the elevation; preferably, the bottom of the pier column reinforcement cage 1 is inserted into the main reinforcement of the cap, and after adjusting the elevation, 4-6 auxiliary reinforcements 3 are used to connect the bottom of the pier column reinforcement cage 1, thereby supporting the pier column reinforcement cage 1 and fixing the elevation; thereby preventing local sinking of the cushion layer;

[0066] Step S4: Place the movable concrete anchor block 4 to the preset position, and at the same time connect one end of the positioning guy rope 5 to the upper part of the pier column reinforcement cage 1, and the other end is connected to the arc ear 41 on the movable concrete anchor block 4 through the basket bolt 51, and the verticality of the pier column reinforcement cage 1 is fine-tuned through the basket bolt 51.

[0067] In this embodiment, specifically, in step S4, it should be ensured that the angle between the positioning guy rope 5 and the ground does not exceed 45°.

[0068] The above-described embodiments merely represent specific implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the technical concept of the present application, and all such variations and improvements fall within the scope of protection of the present application.

[0069] This background section is provided to generally present the context of the invention, and the work of the presently named inventors, the work to the extent described in this background section, and aspects of the description in this section that did not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present invention.

Claims

1. A positioning system for hoisting and installing steel cages for elevated bridge piers, characterized in that: include: Pier column reinforcement cage plane positioning device, pier column reinforcement cage elevation adjustment device, pier column reinforcement cage verticality control device; The pier column reinforcement cage plane positioning device comprises: A positioning hoop (21), wherein the positioning hoop (21) is fixed on the main reinforcement of the pedestal (2); the bottom of the pier column reinforcement cage (1) is inserted into the positioning hoop (21) and connected to the bottom of the main reinforcement of the pedestal (2), and the positioning hoop (21) performs plane positioning on the bottom of the pier column reinforcement cage (1); The pier column reinforcement cage elevation adjustment device comprises: Auxiliary reinforcement (3), one end of the auxiliary reinforcement (3) is connected to the bottom of the pier column reinforcement cage (1), and the other end of the auxiliary reinforcement (3) is inserted into the positioning hoop (21) along with the bottom of the pier column reinforcement cage (1) and connected to the bottom of the main reinforcement of the pedestal (2), and the auxiliary reinforcement (3) is used to adjust the elevation of the pier column reinforcement cage (1); The pier column reinforcement cage verticality control device comprises: A movable concrete anchor block (4) and a positioning guy rope (5), one end of the positioning guy rope (5) is connected to the upper part of the pier column reinforcement cage (1), and the other end of the positioning guy rope (5) is connected to the movable concrete anchor block (4), and the deadweight of the movable concrete anchor block (4) offsets the tension on the upper part of the pier column reinforcement cage (1), thereby adjusting the verticality of the pier column reinforcement cage (1); The steel bar type used in the positioning hoop (21) is consistent with the hoop bar type used in the pier column reinforcement cage (1); The plane size of the positioning hoop (21) is consistent with the cross-sectional size of the bottom of the pier column reinforcement cage (1), so that the bottom of the pier column reinforcement cage (1) is in close contact with the inner surface of the positioning hoop (21), ensuring that the bottom of the pier column reinforcement cage (1) is positioned on a specified plane; The length of the auxiliary reinforcement (3) is greater than the length between the bottom of the main reinforcement of the pedestal (2) and the bottom of the pier column reinforcement cage (1), ensuring that when the pier column reinforcement cage (1) is located at a specified elevation, the auxiliary reinforcement (3) can be connected to the bottom of the main reinforcement of the pedestal (2), thereby dispersing the weight of the pier column reinforcement cage (1); The movable concrete anchor block (4) comprises: A circular arc lifting lug (41) and a concrete anchor block (42); the circular arc lifting lug (41) is arranged on the concrete anchor block (42) and is used to be connected to a positioning guy rope (5).

2. A positioning system for hoisting and installing steel cages for viaduct piers according to claim 1, characterized in that: The arc hanging ear (41) is connected to the positioning guy rope (5) via a basket bolt (51), and the verticality of the pier column reinforcement cage (1) is fine-tuned via the basket bolt (51).

3. A positioning system for hoisting and installing steel cages for viaduct piers according to claim 1, characterized in that: The concrete anchor block (42) is composed of C20 concrete and internal steel bars, and the arc hanging ear (41) is tied and fixed to the internal steel bars of the concrete anchor block (42).

4. A positioning system for hoisting and installing steel cages for viaduct piers according to claim 3, characterized in that: The size of the concrete anchor block (42) is 1.0*1.0*1.2m.

5. A positioning system for hoisting and installing steel cages for viaduct piers according to claim 1, characterized in that: The number of auxiliary bars (3) on one side of the bottom of the pier column reinforcement cage (1) is 4-6.

6. A positioning method for hoisting and installing steel cages for elevated bridge piers, characterized in that: A positioning system for hoisting and installing a steel cage for a viaduct pier according to any one of claims 1 to 5, comprising: Step S1: measuring and laying out the bottom plane position of the pier column reinforcement cage (1) on the main reinforcement of the pedestal (2) in advance, and welding the positioning hoop (21) to the main reinforcement of the pedestal (2) at the plane position; Step S2: Welding 4-6 auxiliary bars (3) on one side of the bottom of the pier column reinforcement cage (1) to facilitate controlling the elevation of the pier column reinforcement cage (1); Step S3: Connect one end of the auxiliary reinforcement (3) to the bottom of the pier column reinforcement cage (1) and perform a lap weld of not less than 20 cm, and connect the other end to the bottom main reinforcement of the platform (2), thereby dispersing the weight of the pier column reinforcement cage (1) and playing the role of fixing the elevation; Step S4: The movable concrete anchor block (4) is placed at a preset position, and at the same time, one end of the positioning guy rope (5) is connected to the upper part of the pier column reinforcement cage (1), and the other end is connected to the arc hanging ear (41) on the movable concrete anchor block (4) through the basket bolt (51), and the verticality of the pier column reinforcement cage (1) is fine-tuned through the basket bolt (51).

7. A positioning method for hoisting and installing a steel cage for a viaduct pier according to claim 6, characterized in that: In the step S4, it should be ensured that the angle between the positioning guy rope (5) and the ground does not exceed 45°.

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