Pier post-cast strip concrete closing section alignment regulation device

Abstract

The application provides a bridge pier post-cast strip concrete closing section alignment regulation device, which comprises two bearing units, two linear telescopic adjusting pieces and two displacement detecting pieces. The two bearing units are separated from each other and arranged on opposite sides of a bridge pier upper pre-cast section. The two linear telescopic adjusting pieces are fixed on the upper parts of the two bearing units, the telescopic ends of the two linear telescopic adjusting pieces are arranged towards each other and can abut against the bridge pier upper pre-cast section. The two displacement detecting pieces are arranged on the corresponding linear telescopic adjusting pieces and used for detecting the telescopic displacement of the corresponding telescopic ends. The two linear telescopic adjusting pieces can be in a jacking state or a non-jacking force state. The bridge pier post-cast strip concrete closing section alignment regulation device provided by the application can avoid the interference of bearing unit deformation when the position is determined according to the telescopic amount of the bearing unit on the stressed side, and can realize the accurate alignment of the upper and lower pre-cast sections of the bridge pier in the post-cast closing section construction process.

Description

Technical Field

[0001] This application belongs to the technical field, specifically relating to a device for aligning and controlling the concrete closure section of a bridge pier post-cast strip. Background Technology

[0002] When bridge piers are constructed using upper and lower pre-cast sections, a closure section needs to be cast between the two pre-cast sections to form a monolithic structure. During the closure construction, the bridge beams and the upper pre-cast section of the pier may experience lateral displacement due to factors such as changes in ambient temperature, construction loads, and site disturbances, causing changes in the relative positions of the upper and lower pre-cast sections. If this is not corrected in time, it may result in deviations in the axis and verticality of the closure section, affecting the quality of the pier's formation.

[0003] Current methods for constructing closure sections typically employ temporary supports and jacking equipment to limit or adjust the position of the pre-cast section above the pier. However, due to factors such as site space, support structure rigidity, equipment installation status, and jacking load, the jacking equipment may experience insufficient installation stability during use. Furthermore, the travel changes displayed by the equipment cannot consistently and accurately represent the actual displacement of the pier, making it difficult to accurately determine the correction endpoint. In addition, existing methods rely heavily on the on-site observation and operational experience of construction personnel, limiting their ability to continuously control pier position changes during casting, potentially leading to under-correction or over-correction. Summary of the Invention

[0004] This application provides a device for adjusting the alignment of the post-cast concrete closure section of a bridge pier, which aims to solve the problems in the prior art of unstable installation of jacking equipment and inaccurate judgment of manual displacement during the construction of the pier closure section, as well as over- or under-alignment of the bridge pier.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A device for aligning and adjusting the post-cast concrete closure section of a bridge pier is provided to assist in forming a post-cast closure section between the pre-cast lower section and the pre-cast upper section of the bridge pier. The device is characterized by comprising: Two load-bearing units are separated from each other and respectively set on opposite sides of the precast upper section of the pier. The lower part of each load-bearing unit is anchored to the precast lower section of the pier, and the upper part of each load-bearing unit extends to the side of the precast upper section of the pier. Two linear telescopic adjustment components are respectively fixed to the upper part of the two bearing units and placed on opposite sides of the pre-cast upper section of the pier. The telescopic ends of the two linear telescopic adjustment components are arranged facing each other in the horizontal direction and can both abut against the pre-cast upper section of the pier; and Two displacement detection elements are respectively set on the corresponding linear telescopic adjustment elements, and are used to detect the telescopic displacement of the telescopic end of the corresponding linear telescopic adjustment element relative to the fixed part. Among them, the two linear telescopic adjustment members can be selectively in a pushing state and a no-pushing state; The two linear telescoping adjustment members are configured such that when the precast section on the upper part of the pier experiences lateral displacement, the linear telescoping adjustment member located on one side of the displacement direction applies a jacking force as a jacking adjustment member, while the linear telescoping adjustment member located on the other side of the displacement direction remains in a state without jacking force as a reference detection member.

[0006] In one possible implementation, a force-transmitting constraint member is also included, which surrounds the outer periphery of the pre-cast section of the upper part of the pier. The force-transmitting constraint member is located close to the post-cast closure section, and the two telescopic ends are respectively facing opposite sides of the force-transmitting constraint member and can abut against the force-transmitting constraint member to transmit lateral jacking force to the pre-cast section of the upper part of the pier through the force-transmitting constraint member.

[0007] In one possible implementation, the force-transmitting constraint is a rigid pier clamp; The telescopic axes of the two linear telescopic adjustment components are located on the same transverse straight line; both linear telescopic adjustment components are hydraulic jacks, and both hydraulic jacks have the same initial pre-extension stroke when there is no thrust; both displacement detection components are displacement sensors built into the corresponding hydraulic jacks.

[0008] In one possible implementation, the load-bearing unit is a steel truss, which includes a lower diagonal brace, a middle crossbeam, an upper support leg, and a jacking crossbeam. The lower diagonal brace extends upward from the pre-cast section at the bottom of the pier and connects to the middle crossbeam. The middle crossbeam is laterally connected to the pre-cast section at the bottom of the pier. The upper support leg is connected to the middle crossbeam and extends upward. The jacking crossbeam is connected to the upper end of the upper support leg. The corresponding linear telescopic adjustment component is installed on the jacking crossbeam.

[0009] In one possible implementation, the lower diagonal brace and the middle crossbeam are respectively connected to the precast lower section of the pier via anchoring components; Each of the anchoring components includes an anchor plate that fits against the outer wall of the precast section at the bottom of the pier, an anchor hole opened in the anchor plate, and an anchoring component that passes through the anchor hole and connects to the pre-embedded connection part in the precast section at the bottom of the pier.

[0010] In one possible implementation, foot reinforcement plates are provided at the lower end of the lower diagonal brace and the end of the middle crossbeam, respectively. A node plate and connecting bolts passing through the node plate are provided between the upper support leg and the middle crossbeam; The jacking beam is connected to the side of the top of the upper support leg, and a reinforcing plate is provided between the jacking beam and the upper support leg.

[0011] In one possible implementation, each of the linear telescopic adjustment members is fixed to the upper part of the corresponding support unit by a mounting assembly; The installation assembly includes a support member disposed on the lower side of the linear telescopic adjustment member and a clamping member disposed on the upper side of the linear telescopic adjustment member. The support member and the clamping member are detachably connected and clamp and fix the linear telescopic adjustment member from both the upper and lower sides.

[0012] In one possible implementation, the mounting assembly further includes two parallel bracket channel steels; The support member includes a plurality of L-shaped steel brackets spaced apart along the telescopic axis of the linear telescopic adjustment member, and the plurality of L-shaped steel brackets are detachably connected to two bracket channel steels respectively. The clamping component includes multiple U-shaped buckles that correspond one-to-one with the multiple L-shaped steel brackets; Vertical slots are respectively opened on the inner sides of the two bracket channel steels. The two ends of each U-shaped buckle are respectively inserted into the corresponding vertical slot and connected to the corresponding L-shaped steel bracket by fastening bolts, so that the linear telescopic adjustment component is clamped and fixed by the U-shaped buckle and the L-shaped steel bracket.

[0013] In one possible implementation, a bracket brace is provided between the mounting component and the upper part of the corresponding bearing unit. One end of the bracket brace is connected to the mounting component, and the other end is detachably connected to the corresponding bearing unit via a connecting plate and a pin.

[0014] In one possible implementation, a control component is also included, which is signal-connected to the two displacement detection elements and to the drive systems of the two linear telescopic adjustment elements respectively. The control component is configured as follows: When the pre-cast section on the upper part of the pier is in the initial alignment state, the telescopic ends of the two linear telescopic adjustment components are respectively brought into contact with the pre-cast section on the upper part of the pier, and both linear telescopic adjustment components are in a state of no top thrust. The readings of the two displacement detection components at this time are recorded as the initial reference values. When it is detected that the pre-cast section of the upper part of the pier is offset towards the first side, the linear expansion adjustment component on the first side is identified as the jacking adjustment component, and the linear expansion adjustment component on the second side is identified as the reference detection component. The reference detection component is controlled to move along the extension direction by a preset compensation stroke without top thrust, so that a gap is formed between the telescopic end of the reference detection component and the pre-cast section of the upper part of the pier, and the position after the reference detection component is moved is determined as the detection position. The preset compensation stroke is less than the offset of the pre-cast section of the upper part of the pier towards the first side. The jacking adjustment component is controlled to apply a lateral jacking force toward the second side to the pre-cast section above the pier, while keeping the reference detection component in a state without jacking force. After the pre-cast section on the upper part of the pier moves toward the second side and abuts against the telescopic end of the reference detection piece, the telescopic displacement of the reference detection piece is continued to be detected by the displacement detection piece corresponding to the reference detection piece. When the displacement detection value of the reference detection component recovers to the same as the initial reference value or is within the preset allowable deviation range, it is determined that the pre-cast section of the upper part of the pier has recovered to the initial alignment state, and the jacking operation of the jacking adjustment component is stopped.

[0015] Compared with the prior art, the positioning and control device for the concrete closure section of the post-cast strip of the bridge pier provided in this application provides a stable lateral jacking support for the linear expansion joints on both sides by anchoring two independent bearing units to the pre-cast section at the bottom of the bridge pier, thereby reducing construction vibration and equipment shaking and displacement caused by jacking load.

[0016] The two linear expansion joints are arranged facing each other. They can be selected to apply a reverse jacking force according to the offset direction of the pre-cast section on the upper part of the pier, while keeping the other linear expansion joint in a state without jacking force.

[0017] Since the bearing unit on the side without jacking force is basically unaffected by the jacking load and its structural deformation is small, the expansion and contraction displacement detected by the displacement detection device on this side can be used as the displacement benchmark for judging the actual lateral position of the pre-cast section on the upper part of the pier. This avoids interference from the deformation of the bearing unit when judging the position by the expansion and contraction on the stressed side, reduces the risk of over-adjustment or under-adjustment, and achieves accurate alignment of the upper and lower pre-cast sections of the pier during the construction of the post-cast closure section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the alignment and control device for the post-cast concrete closure section of a bridge pier provided in an embodiment of this application; Figure 2This is a side view of the alignment and control device for the concrete closure section of the bridge pier post-cast strip provided in an embodiment of this application; Figure 3 A top view of the alignment and control device for the post-cast concrete closure section of a bridge pier provided in an embodiment of this application; Figure 4 This is a schematic diagram of the assembly of the linear telescopic adjustment component and the load-bearing unit used in the embodiments of this application; Figure 5 This is a schematic diagram of the installation components used in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Bearing unit; 11. Lower diagonal brace; 12. Middle crossbeam; 13. Upper support leg; 14. Push beam; 15. Anchoring assembly; 16. Node plate; 2. Linear telescopic adjustment component; 3. Displacement detection components; 4. Force transmission constraint components; 5. Installation components; 51. Support components; 52. Clamping components; 53. Bracket channel steel; 54. Bracket diagonal brace; 6. Pre-cast section at the bottom of the bridge pier; 7. The pre-cast section of the upper part of the bridge pier. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0027] Please refer to the following: Figures 1 to 5The following describes the alignment and control device for the concrete closure section of the bridge pier post-cast strip provided in this application. The alignment and control device for the concrete closure section of the bridge pier post-cast strip is used to assist in forming a post-cast closure section between the lower pre-cast section 6 and the upper pre-cast section 7 of the bridge pier. It includes two bearing units 1, two linear expansion joints 2, and two displacement detection elements 3. The two bearing units 1 are separated from each other and are respectively located on opposite sides of the upper pre-cast section 7 of the bridge pier. The lower part of each bearing unit 1 is anchored to the lower pre-cast section 6 of the bridge pier, and the upper part of each bearing unit 1 extends to the side of the upper pre-cast section 7 of the bridge pier. The two linear expansion joints 2 are respectively fixed to the upper parts of the two bearing units 1 and are placed on opposite sides of the upper pre-cast section 7 of the bridge pier. The expansion ends of the two linear expansion joints 2 are arranged horizontally towards each other and can both abut against the upper pre-cast section 7 of the bridge pier. The two displacement detection elements 3 are respectively set... Placed on the corresponding linear telescopic adjustment member 2, it is used to detect the telescopic displacement of the telescopic end of the corresponding linear telescopic adjustment member 2 relative to the fixed part; wherein, the two linear telescopic adjustment members 2 can be selectively in a pushing state and a non-pushing state; the two linear telescopic adjustment members 2 are configured such that when the pre-cast section 7 on the upper part of the pier is laterally offset, the linear telescopic adjustment member 2 located on one side of the offset direction applies the pushing force as a pushing adjustment member, and the linear telescopic adjustment member 2 located on the other side of the offset direction remains in a non-pushing state as a reference detection member.

[0028] It should be noted that the bearing unit 1 refers to the support structure used to bear the jacking reaction force of the linear expansion joint 2 and transmit the reaction force to the pre-cast section 6 at the bottom of the pier. It can be a steel truss, steel bracket, combined support frame or other structure with bearing and anchoring functions.

[0029] It should be noted that the linear telescopic adjustment component 2 refers to the actuator whose telescopic end can extend or retract in a straight line and can apply a lateral force to the pre-cast section 7 on the upper part of the pier. It is preferably a hydraulic jack, but an electric cylinder, a mechanical screw jack, or a hydraulic cylinder can also be used.

[0030] It should be noted that the fixed part is the end of the linear telescopic adjustment member 2 that maintains a fixed position relative to the telescopic end.

[0031] It should be noted that the jacking state refers to the state in which the telescopic end of the linear telescopic adjustment component 2 abuts against the pre-cast section 7 of the upper part of the pier or the force transmission constraint component 4 and applies a lateral jacking force; the state without jacking force refers to the state in which the linear telescopic adjustment component 2 does not actively apply a lateral jacking force for adjustment to the pre-cast section 7 of the upper part of the pier, and its drive system is in a state of unloading, floating, or allowing the telescopic end to passively retract. The equipment friction, sealing resistance, and oil return resistance generated after the reference detection component comes into contact with the pre-cast section 7 of the upper part of the pier or the force transmission constraint component 4 are not considered as active jacking forces in this embodiment.

[0032] Specifically, two hydraulic jacks are installed on the upper part of the two bearing units 1 respectively. The telescopic axes of the hydraulic jacks extend laterally along the pier, and the two telescopic ends are set facing each other. Before construction, the pre-cast section 7 of the upper part of the pier is initially aligned. When the pre-cast section 7 of the upper part of the pier shifts to the right during the pouring process, the right hydraulic jack is used to push the pre-cast section 7 of the upper part of the pier to the left, while the left hydraulic jack remains in a state of no pushing force, and the displacement detection element 3 of the left hydraulic jack is used as the reset judgment benchmark.

[0033] Compared with the prior art, the pier post-cast strip concrete closure section alignment and control device provided in this embodiment, by setting two bearing units 1 that are separated from each other and located on opposite sides of the pre-cast section 7 on the upper part of the pier, enables the two linear telescopic adjustment members 2 to obtain independent lateral support paths.

[0034] The lower part of the bearing unit 1 is directly anchored to the pre-cast section 6 at the bottom of the pier. Therefore, the jacking reaction force can be transmitted to the already formed and relatively stable pre-cast section at the bottom, avoiding the simple placement of the jacking equipment on the construction ground or temporary support, and reducing the possibility of the equipment shaking or shifting under the action of construction vibration, concrete pouring disturbance and jacking load.

[0035] Two linear telescopic adjustment components 2 are set facing each other and can abut against the pre-cast section 7 on the upper part of the pier. They can select one side to push in the opposite direction according to the offset direction of the pre-cast section 7 on the upper part of the pier, while keeping the other side in a state without pushing force.

[0036] The non-pushing side bearing unit 1 does not bear the main pushing reaction force, and its structural deformation is small. The detection value of the corresponding displacement detection piece 3 is less affected by the deformation of the support, and can be used as a benchmark for lateral displacement correction of the pier, reducing the risk of over-adjustment or under-adjustment.

[0037] In some embodiments, see Figure 1 and Figure 4 It also includes a force-transmitting constraint 4 that surrounds the outer periphery of the pre-cast section 7 on the upper part of the pier. The force-transmitting constraint 4 is located near the post-cast closure section, with its two telescopic ends facing the opposite sides of the force-transmitting constraint 4 and able to abut against the force-transmitting constraint 4, so as to transmit the lateral jacking force to the pre-cast section 7 on the upper part of the pier through the force-transmitting constraint 4.

[0038] In this embodiment, the force transmission constraint component 4 is a steel pier clamp, which is fitted onto the pre-cast section 7 of the upper part of the pier near the post-cast closure section. The inner side of the clamp is in contact with the outer wall of the pier, and the left and right sides of the outer side form jacking contact surfaces respectively. The telescopic ends of the two hydraulic jacks face the jacking contact surfaces on both sides of the clamp.

[0039] When the right-side hydraulic jack operates, its telescopic end presses against the outer wall of the right side of the clamp, and the thrust is transmitted circumferentially through the clamp to the pre-cast section 7 on the upper part of the pier, causing the entire pre-cast section 7 on the upper part of the pier to move to the left. The clamp transforms the local point force into a surface force distributed along the circumference of the pier, preventing the top of the jack from directly pressing on the concrete edges or weak points.

[0040] In this embodiment, by setting a force-transmitting constraint member 4 on the outer periphery of the pre-cast section 7 at the top of the pier, the expansion and contraction ends of the linear expansion and contraction adjustment member 2 do not act directly on the concrete pier body, but act on the opposite sides of the force-transmitting constraint member 4.

[0041] The concentrated jacking force generated by the linear expansion joint 2 can be transmitted and distributed to the outer periphery of the pre-cast section 7 on the upper part of the pier through the force transmission constraint member 4, thereby expanding the stress area and reducing the risk of localized pressure, localized spalling, or edge damage of the concrete.

[0042] The force transmission constraint 4 maintains the relative positional relationship between the two jacking action points, making the jacking direction of the two linear expansion joints 2 more stable and reducing the possibility of slippage, deflection, or local jamming between the expansion joint and the pier. The force transmission constraint 4 is set close to the post-cast closure section, which is conducive to forming a more direct attitude adjustment effect in the upper and lower connection areas of the closure section and reducing the additional bending moment caused by the jacking position deviating from the closure section.

[0043] In some embodiments, see Figure 1 and Figure 4 The force transmission constraint 4 is a rigid pier clamp; the telescopic axes of the two linear telescopic adjustment components 2 are located on the same transverse straight line; both linear telescopic adjustment components 2 are hydraulic jacks, and the two hydraulic jacks have the same initial pre-extension stroke in the state without jacking force; both displacement detection components 3 are displacement sensors built into the corresponding hydraulic jacks.

[0044] It should be noted that rigid pier clamps refer to a ring-shaped steel structure that does not undergo significant deformation under normal jacking loads and can transfer the jacking force to the pier body. The clamps can be a one-piece molded structure or formed by bolting together two or more clamp units.

[0045] It should be noted that the initial pre-extension stroke refers to the extension amount by which the two telescopic ends reach the preset extension position after the initial alignment of the pre-cast section 7 of the upper part of the pier is completed, without the two hydraulic jacks applying any jacking force. Preferably, the telescopic ends just contact the corresponding outer wall of the clamp, but without generating a measurable jacking pressure.

[0046] It should be noted that the displacement sensor reading is the value output by displacement detection component 3, which represents the displacement or extension of the hydraulic jack's telescopic part relative to the fixed part, and is not equivalent to the absolute coordinates of the bridge pier itself.

[0047] Specifically, after construction and installation are completed, the pre-cast section 7 of the upper part of the pier is first adjusted to its initial alignment using measuring instruments. Then, without applying any jacking force with the two hydraulic jacks, the left and right telescopic ends are brought into contact with the opposite outer walls of the pier's clamps. At this point, the left displacement sensor reading is Lleft = 0, and the right displacement sensor reading is Lright = 0. Under symmetrical equipment installation and with permissible error, Lleft = 0 and Lright = 0 can be equal or within the set allowable difference.

[0048] When the pre-cast section 7 of the upper part of the pier shifts to the right, the telescopic end of the right hydraulic jack is squeezed by the clamp, and the reading of the right sensor changes; the left hydraulic jack remains without jacking force and is used as a reference detection component. Since the left bearing unit 1 does not bear the main jacking load, the reading of the left sensor can more stably reflect the relative position change between the clamp and the left jack.

[0049] In this embodiment, the two linear telescopic adjustment components 2 are defined as hydraulic jacks, and the two hydraulic jacks have the same initial pre-extension stroke when there is no thrust, thereby establishing a unified initial detection condition.

[0050] The telescopic axes of the two hydraulic jacks are located on the same horizontal straight line, which allows the jacking force and the reverse constraint force to act at the same horizontal height, reducing the additional torque and rotational deviation caused by the inconsistency in the height of the two points of action.

[0051] The displacement sensor built into the hydraulic jack can directly detect the expansion and contraction displacement of the telescopic part relative to the fixed part, reducing the impact of construction space, pouring operations, and personnel obstruction on external measuring devices. The same initial pre-extension stroke makes the detection values ​​on both sides comparable, which is helpful in determining the direction and extent of the displacement of the pre-cast section 7 on the upper part of the pier.

[0052] In some implementations, the force-transmitting constraint 4 is a detachable pier clamp formed by splicing two, four or more clamp units. Each clamp unit is connected by flange plates and high-strength bolts, and an elastic pad is provided on the inner side of the clamp to accommodate the pre-cast upper section 7 of the pier with different cross-sectional dimensions.

[0053] In some embodiments, see Figure 1 The bearing unit 1 is a steel truss, which includes a lower diagonal brace 11, a middle crossbeam 12, an upper support leg 13, and a jacking crossbeam 14. The lower diagonal brace 11 extends upward from the precast section 6 at the bottom of the pier and connects to the middle crossbeam 12. The middle crossbeam 12 is laterally connected to the precast section 6 at the bottom of the pier. The upper support leg 13 is connected to the middle crossbeam 12 and extends upward. The jacking crossbeam 14 is connected to the upper end of the upper support leg 13. The corresponding linear telescopic adjustment component 2 is installed on the jacking crossbeam 14.

[0054] It should be noted that a steel truss refers to a spatial or planar load-bearing frame composed of multiple steel members, beams and connecting nodes. Its main function is to bear the jacking reaction force of the linear expansion joint 2 and transfer it to the pre-cast section 6 at the bottom of the pier.

[0055] It should be noted that the jacking beam 14 refers to the transverse beam installed on the upper end of the upper support leg 13 for installing and bearing the linear telescopic adjustment component 2.

[0056] In this embodiment, the bearing unit 1 is specifically configured as a steel truss consisting of a lower diagonal brace 11, a middle crossbeam 12, an upper support leg 13, and a jacking crossbeam 14, so that the bearing unit 1 forms a clear force transmission path from the linear telescopic adjustment member 2 to the pre-cast section 6 at the bottom of the pier.

[0057] The lower diagonal brace 11 can decompose the jacking reaction force into an axial force along the direction of the diagonal brace and a lateral component force acting on the connection node. The middle crossbeam 12 is used to connect and constrain the structures on both sides of the steel truss. The upper support leg 13 is used to provide height and position support for the jacking crossbeam 14, which directly bears the linear telescopic adjustment component 2.

[0058] Compared to a single column or simple support, the structure of this embodiment has higher lateral stiffness and anti-overturning capacity, which can reduce the lateral swaying and bending deformation of the support during the jacking process, and make the fixed part where the displacement detection component 3 is located have a more stable reference position. The steel truss is assembled from multiple steel components, which facilitates the adjustment of component length, connection position and support angle according to different pier sizes and closure section heights.

[0059] In some embodiments, see Figure 1 and Figure 2 The lower diagonal brace 11 and the middle crossbeam 12 are respectively connected to the precast section 6 of the lower part of the pier through anchoring components 15; each anchoring component 15 includes an anchor plate that fits against the outer wall of the precast section 6 of the lower part of the pier, an anchor hole opened in the anchor plate, and an anchor that passes through the anchor hole and connects to the pre-embedded connection part in the precast section 6 of the lower part of the pier.

[0060] It should be noted that the pre-embedded connection part refers to the component that is pre-set inside the concrete during the pouring of the lower section 6 of the bridge pier for connection with the anchor, such as the pre-embedded screw, pre-embedded sleeve, anchor bolt, pre-embedded steel plate or anchor with threaded connection part.

[0061] It should be noted that the anchor plate refers to the steel plate or steel connecting plate that is attached to the outer wall of the precast section 6 at the bottom of the pier, and is used to disperse the local force transmitted by the anchor.

[0062] In this embodiment, the anchoring assembly 15 is formed by anchor plates, anchor holes and anchors, so that the lower diagonal brace 11 and the middle crossbeam 12 can form a reliable mechanical connection with the precast section 6 at the bottom of the pier.

[0063] The anchor plate is attached to the outer wall of the pier, which can increase the contact area between the steel truss and the pier body and reduce the local compressive stress at the anchoring position; the anchor hole provides a clear channel for the anchor to pass through and position, so that the anchor can transfer the tension, compression and shear force of the steel truss to the pre-embedded connection part in the pre-cast section 6 at the bottom of the pier.

[0064] Anchoring components 15 are respectively installed on the lower diagonal brace 11 and the middle crossbeam 12, which can form a multi-point anchoring system that is separated at the top and bottom. This restricts the displacement of the bearing unit 1 in the jacking direction, vertical direction and rotation direction, reduces the risk of slippage, rotation or partial detachment of the steel truss due to single-point force, and also allows the bearing unit 1 to be repeatedly disassembled and reused.

[0065] In some embodiments, see Figure 1 The lower end of the lower diagonal brace 11 and the end of the middle crossbeam 12 are respectively provided with foot reinforcement plates; a node plate 16 and connecting bolts passing through the node plate 16 are provided between the upper support leg 13 and the middle crossbeam 12; the jacking crossbeam 14 is connected to the side of the top of the upper support leg 13, and a reinforcement plate is provided between the jacking crossbeam 14 and the upper support leg 13.

[0066] It should be noted that the foot reinforcement plate refers to the steel plate, stiffening rib or corner brace installed at the lower end of the lower diagonal brace 11 or the end node of the middle crossbeam 12, which is used to improve the compressive, shear and bending resistance of the node area.

[0067] It should be noted that the node plate 16 refers to the connecting plate located at the connection of two or more steel members, used to transmit the internal forces of the members and maintain the geometric position of the connection.

[0068] Specifically, foot reinforcement plates are welded to both sides of the lower end of the lower diagonal brace 11, and the foot reinforcement plates extend along the connection area between the lower diagonal brace 11 and the anchor plate. A foot reinforcement plate is provided at the end of the middle crossbeam 12 to strengthen the connection area between the middle crossbeam 12 and the anchor plate.

[0069] Specifically, the upper support leg 13 and the middle crossbeam 12 are connected by a node plate 16 and connecting bolts. During assembly, the node plate 16 is first attached to the upper support leg 13 and the middle crossbeam 12 respectively, and then the connecting bolts are inserted and tightened. The jacking crossbeam 14 is welded or bolted to the top side of the upper support leg 13. A triangular reinforcing plate is set between the jacking crossbeam 14 and the upper support leg 13 to improve the bending stiffness of the jacking crossbeam 14.

[0070] In this embodiment, foot reinforcement plates are provided at the lower end of the lower diagonal brace 11 and the end of the middle crossbeam 12 to increase the effective stress area of ​​the members and nodes, and reduce stress concentration at welds, bolt connections and local steel plate surfaces.

[0071] The node plate 16 and connecting bolts form a detachable node connection between the upper support leg 13 and the middle crossbeam 12, facilitating on-site installation, alignment, and dismantling of the steel truss, while providing sufficient shear and bending resistance at the node location. The jacking crossbeam 14 is connected to the top side of the upper support leg 13, and the connection is reinforced by a reinforcing plate, which improves the load-bearing capacity of the jacking crossbeam 14 against the reaction force of the hydraulic jacks and reduces the possibility of local bending, weld tearing, or loosening of the connection between the jacking crossbeam 14 and the upper support leg 13.

[0072] This embodiment can improve the overall stiffness and anti-disturbance ability of the bearing unit 1, and provide a more stable fixed reference for displacement detection.

[0073] In some embodiments, see Figure 1 , Figure 2 and Figure 5 Each linear telescopic adjustment member 2 is fixed to the upper part of the corresponding bearing unit 1 by the mounting assembly 5; the mounting assembly 5 includes a support member 51 disposed on the lower side of the linear telescopic adjustment member 2 and a clamping member 52 disposed on the upper side of the linear telescopic adjustment member 2. The support member 51 and the clamping member 52 are detachably connected and clamp the linear telescopic adjustment member 2 together from the upper and lower sides.

[0074] It should be noted that the support member 51 refers to the component located below the linear telescopic adjustment member 2, which is used to bear its weight and restrict its downward movement.

[0075] It should be noted that the clamping member 52 refers to the component located on the upper side of the linear telescopic adjustment member 2, which cooperates with the supporting member 51 to restrict the linear telescopic adjustment member 2 from moving upward or sideways.

[0076] In this embodiment, each linear telescopic adjustment member 2 is fixed to the corresponding bearing unit 1 by the installation component 5, and the position of the linear telescopic adjustment member 2 is restricted from both the upper and lower directions by the lower support member 51 and the upper clamping member 52.

[0077] The support component 51 bears the weight of the linear telescopic adjustment component 2 and part of the pushing reaction force, while the clamping component 52 restricts the linear telescopic adjustment component 2 from jumping upward or moving laterally under vibration, impact and reverse force. Together, they improve the installation stability of the linear telescopic adjustment component 2.

[0078] The support component 51 and the clamping component 52 are detachably connected, allowing for adjustment of the clamping gap and installation height according to different specifications of hydraulic jacks, facilitating quick on-site installation, disassembly, maintenance, and reuse. The linear telescopic adjustment component 2 is fixed to the bearing unit 1, and the relative position between its fixed part and the bearing unit 1 is more stable, reducing the impact of equipment displacement on the displacement detection results.

[0079] In some embodiments, see Figure 1 , Figure 3 and Figure 5 The installation component 5 also includes two parallel bracket channel steels 53; the support component 51 includes multiple L-shaped steel brackets spaced apart along the telescopic axis of the linear telescopic adjustment component 2, and the multiple L-shaped steel brackets are detachably connected to the two bracket channel steels 53 respectively; the clamping component 52 includes multiple U-shaped buckles that correspond one-to-one with the multiple L-shaped steel brackets; the two inner sides of the two bracket channel steels 53 are respectively provided with vertical slots, and the two ends of each U-shaped buckle are respectively inserted into the corresponding vertical slots and connected to the corresponding L-shaped steel brackets by fastening bolts, so that the linear telescopic adjustment component 2 is clamped and fixed by the U-shaped buckles and the L-shaped steel brackets.

[0080] Specifically, two bracket channel steels 53 are fixed parallel to each other on the side of the jacking beam 14. Two or more L-shaped steel brackets are arranged at intervals along the telescopic axis of the hydraulic jack, and the two ends of each L-shaped steel bracket are respectively bolted to the inner side of the two bracket channel steels 53.

[0081] Each L-shaped steel bracket is equipped with a U-shaped buckle. Vertical slots are formed on the inner sides of the two bracket channel steels 53. The two ends of the U-shaped buckle are inserted into the corresponding vertical slots, and then connected to the L-shaped steel bracket by fastening bolts. After tightening the fastening bolts, the U-shaped buckle presses down on the hydraulic jack from above, while the L-shaped steel bracket supports it from below, together locking the hydraulic jack. When changing to hydraulic jacks with different outer diameters, the clamping gap can be changed by adjusting the insertion height of the U-shaped buckle in the vertical slot.

[0082] It should be noted that the bracket channel steel 53 refers to the channel steel component that serves as the main support frame of the installation component 5, and the two bracket channel steels 53 are arranged parallel to each other.

[0083] It should be noted that an L-shaped steel bracket refers to a steel support component with an L-shaped cross-section or mutually perpendicular support surfaces, used to support hydraulic jacks from below.

[0084] It should be noted that the U-shaped buckle refers to a steel clamp 52 with a U-shaped cross-section or overall shape, used to press the hydraulic jack from above.

[0085] It should be noted that a vertical slot refers to a long, narrow hole, groove, or opening that extends along the height direction, used for inserting the end of the U-shaped buckle and adjusting the installation height.

[0086] In this embodiment, the main frame of the installation component 5 is formed by two parallel bracket channel steels 53. Multiple L-shaped steel brackets are spaced apart along the axis of the linear telescopic adjustment component 2 to achieve multi-point support. Multiple U-shaped buckles are used to press the linear telescopic adjustment component 2 at multiple points.

[0087] This embodiment can distribute the weight and jacking reaction force of the linear telescopic adjustment component 2 to multiple support positions, reduce the concentrated load borne by a single connection point, and reduce the risk of bracket deformation and bolt loosening.

[0088] The two ends of the U-shaped buckle are inserted into the vertical slot, allowing the buckle's installation height and clamping position to be adjusted within a certain range, thus adapting to hydraulic jacks with different outer diameters and cross-sectional dimensions.

[0089] The L-shaped steel bracket and the U-shaped buckle are connected by fastening bolts, which not only forms a reliable upper and lower clamp, but also facilitates on-site disassembly and reuse, effectively preventing the jack from shaking, shifting or detaching during the jacking process.

[0090] In some embodiments, see Figure 5 A bracket brace 54 is provided between the upper part of the mounting component 5 and the corresponding bearing unit 1. One end of the bracket brace 54 is connected to the mounting component 5, and the other end is detachably connected to the corresponding bearing unit 1 through a connecting plate and a pin.

[0091] In this embodiment, a bracket brace 54 is provided between the installation component 5 and the bearing unit 1, so that the installation component 5 forms a triangular or approximately triangular support system composed of the push beam 14, the bracket channel steel 53 and the bracket brace 54.

[0092] The bracket diagonal brace 54 can share the vertical load and lateral jacking reaction force on the installation component 5, reduce the bending deformation at the connection position between the bracket channel steel 53 and the jacking beam 14, and avoid changes in the installation angle of the hydraulic jack due to local deformation of the support structure.

[0093] The bracket diagonal brace 54 is detachably connected to the bearing unit 1 via a connecting plate and a pin, which facilitates angle adjustment and quick assembly on site, and also makes it easy to dismantle and transport after construction.

[0094] The bracket brace 54 can improve the rigidity of the mounting component 5 and further stabilize the position of the hydraulic jack fixing part, thereby improving the detection reliability when the jack without thrust side is used as the displacement reference.

[0095] In some embodiments, a control component is further included. The control component is signal-connected to two displacement detection elements 3 and to the drive systems of two linear telescopic adjustment elements 2. The control component is configured to: when the pre-cast section 7 on the upper part of the pier is in the initial alignment state, make the telescopic ends of the two linear telescopic adjustment elements 2 abut against the pre-cast section 7 on the upper part of the pier, and both linear telescopic adjustment elements 2 are in a state without jacking force, and record the readings of the two displacement detection elements 3 at this time as initial reference values; when it is detected that the pre-cast section 7 on the upper part of the pier is offset towards the first side, determine the linear telescopic adjustment element 2 on the first side as the jacking adjustment element, and determine the linear telescopic adjustment element 2 on the second side as the reference detection element; control the reference detection element to move a preset compensation line along the extension direction in the state without jacking force. The process involves creating a gap between the telescopic end of the reference detection component and the pre-cast section 7 on the upper part of the pier, and determining the position of the reference detection component after its movement as the detection position. The preset compensation stroke is less than the offset of the pre-cast section 7 on the upper part of the pier towards the first side. The jacking adjustment component is controlled to apply a lateral jacking force towards the second side to the pre-cast section 7 on the upper part of the pier, while keeping the reference detection component in a state without jacking force. After the pre-cast section 7 on the upper part of the pier moves towards the second side and abuts against the telescopic end of the reference detection component, the telescopic displacement of the reference detection component is detected by the displacement detection component 3 corresponding to the reference detection component. When the displacement detection value of the reference detection component returns to the same as the initial reference value or is within the preset allowable deviation range, it is determined that the pre-cast section 7 on the upper part of the pier has returned to the initial alignment state, and the jacking operation of the jacking adjustment component is stopped.

[0096] It should be noted that the initial alignment state refers to the state in which the pre-cast upper section 7 of the pier reaches the preset axial position and verticality requirements relative to the pre-cast lower section 6 of the pier, which is the target state for subsequent displacement correction.

[0097] It should be noted that the initial reference value refers to the readings output by the two displacement detection devices 3 when the two linear telescopic adjustment components 2 are in the initial alignment state, with no jacking force and the telescopic ends abutting against the pier or force transmission constraint component 4 respectively. This value is displacement data, not the absolute coordinates of the pier.

[0098] It should be noted that the preset compensation stroke refers to the additional distance that the reference detection component extends without jacking force after the pier shifts.

[0099] It should be noted that the detection position refers to the working position of the reference detection piece after it has completed the preset compensation stroke. The detection position is different from the contact position in the initial alignment state, and the difference between the two is the preset compensation stroke.

[0100] Specifically, the preset compensation stroke is set to ensure that after the reference detection piece extends, a detection gap is still maintained between it and the pre-cast section 7 on the upper part of the pier.

[0101] This embodiment establishes control logic between displacement detection, status judgment, push adjustment, and reset confirmation through a control component.

[0102] First, when the pre-cast section 7 on the upper part of the pier is in the initial alignment state and there is no jacking force on the two linear expansion joints 2, the readings of the two displacement detection units 3 are recorded as the initial reference values, so as to establish a repeatable numerical reference for subsequent reset judgment.

[0103] When the pre-cast section 7 on the upper part of the pier shifts, the linear expansion adjustment component 2 on one side of the shift direction is used as the jacking adjustment component, and the other side is used as the reference detection component. The reference detection component is moved by a preset compensation stroke without jacking force, so that a detection gap is formed between it and the pier.

[0104] During the jacking adjustment process, the reference detection component does not bear the main jacking force, and the deformation of the bearing unit 1 where its fixed part is located is small; when the pier is reset, the pier re-abuts the reference detection component and causes its expansion and contraction parts to retract.

[0105] When the displacement detection value of the reference test piece returns to the initial reference value or within the allowable deviation range, it indicates that the pre-cast section 7 of the upper part of the pier and the reference test piece have returned to the initial relative position. This allows for accurate determination of whether the pier has been reset, reducing errors caused by relying on the elongation of the jack on the force side or human experience for judgment.

[0106] Specifically, after the initial alignment of the pre-cast section 7 of the pier's upper part is completed, the telescopic ends of the two hydraulic jacks on the left and right sides are brought into contact with the pier's clamps, and neither hydraulic jack applies any jacking force. The readings of the left displacement sensor (Lleft0) and the right displacement sensor (Lright0) are recorded as the initial reference values ​​for the two hydraulic jacks.

[0107] For example, the initial readings of both the left and right hydraulic jacks are 100mm. When the pre-cast section 7 of the upper part of the pier shifts to the right by 8mm during the pouring of the closure section, the right hydraulic jack acts as a jacking adjustment component, and the left hydraulic jack acts as a reference detection component. An approximately 8mm gap is formed between the telescopic end of the left hydraulic jack and the force transmission constraint component 4.

[0108] The right-side hydraulic jack pushes the pre-cast upper section 7 of the pier to the left. The pre-cast upper section 7 moves 3mm to the left, causing the pier clamp 4 to re-engage with the telescopic end of the left-side hydraulic jack; at this point, the left-side displacement sensor reading remains 105mm. Subsequently, the right-side hydraulic jack continues to push to the left, causing the pier clamp 4 to passively retract the telescopic end of the left-side hydraulic jack. The left-side sensor reading gradually decreases from 105mm to 100mm, corresponding to the pier moving another 5mm to the left. The pier moves a total of 3 + 5 = 8mm to the left, thus returning to its initial alignment.

[0109] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for aligning and adjusting the post-cast concrete closure section of a bridge pier, used to assist in forming a post-cast closure section between the pre-cast lower section and the pre-cast upper section of the bridge pier, characterized in that, include: Two load-bearing units are separated from each other and respectively set on opposite sides of the precast upper section of the pier. The lower part of each load-bearing unit is anchored to the precast lower section of the pier, and the upper part of each load-bearing unit extends to the side of the precast upper section of the pier. Two linear telescopic adjustment components are respectively fixed to the upper part of the two bearing units and placed on opposite sides of the pre-cast upper section of the pier. The telescopic ends of the two linear telescopic adjustment components are arranged facing each other in the horizontal direction and can both abut against the pre-cast upper section of the pier; and Two displacement detection elements are respectively set on the corresponding linear telescopic adjustment elements, and are used to detect the telescopic displacement of the telescopic end of the corresponding linear telescopic adjustment element relative to the fixed part. Among them, the two linear telescopic adjustment members can be selectively in a pushing state and a no-pushing state; The two linear telescoping adjustment members are configured such that when the precast section on the upper part of the pier experiences lateral displacement, the linear telescoping adjustment member located on one side of the displacement direction applies a jacking force as a jacking adjustment member, while the linear telescoping adjustment member located on the other side of the displacement direction remains in a state without jacking force as a reference detection member.

2. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 1, characterized in that, It also includes a force-transmitting constraint member that surrounds the outer periphery of the pre-cast section of the upper part of the pier. The force-transmitting constraint member is located close to the post-cast closure section. The two telescopic ends are respectively facing the opposite sides of the force-transmitting constraint member and can abut against the force-transmitting constraint member to transmit the lateral jacking force to the pre-cast section of the upper part of the pier through the force-transmitting constraint member.

3. The alignment and control device for the concrete closure section of the post-cast strip of the bridge pier as described in claim 2, characterized in that, The force transmission constraint component is a rigid pier body clamp; The telescopic axes of the two linear telescopic adjustment components are located on the same transverse straight line; both linear telescopic adjustment components are hydraulic jacks, and both hydraulic jacks have the same initial pre-extension stroke when there is no thrust; both displacement detection components are displacement sensors built into the corresponding hydraulic jacks.

4. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 1, characterized in that, The load-bearing unit is a steel truss, which includes a lower diagonal brace, a middle crossbeam, an upper support leg, and a jacking crossbeam. The lower diagonal brace extends upward from the pre-cast section at the bottom of the pier and connects to the middle crossbeam. The middle crossbeam is laterally connected to the pre-cast section at the bottom of the pier. The upper support leg is connected to the middle crossbeam and extends upward. The jacking crossbeam is connected to the upper end of the upper support leg. The corresponding linear telescopic adjustment component is installed on the jacking crossbeam.

5. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 4, characterized in that, The lower diagonal brace and the middle crossbeam are respectively connected to the precast section of the lower part of the pier through anchoring components; Each of the anchoring components includes an anchor plate that fits against the outer wall of the precast section at the bottom of the pier, an anchor hole opened in the anchor plate, and an anchoring component that passes through the anchor hole and connects to the pre-embedded connection part in the precast section at the bottom of the pier.

6. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 4, characterized in that, The lower end of the lower diagonal brace and the end of the middle crossbeam are respectively provided with foot reinforcement plates; A node plate and connecting bolts passing through the node plate are provided between the upper support leg and the middle crossbeam; The jacking beam is connected to the side of the top of the upper support leg, and a reinforcing plate is provided between the jacking beam and the upper support leg.

7. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 1, characterized in that, Each of the linear telescopic adjustment components is fixed to the upper part of the corresponding bearing unit by a mounting assembly; The installation assembly includes a support member disposed on the lower side of the linear telescopic adjustment member and a clamping member disposed on the upper side of the linear telescopic adjustment member. The support member and the clamping member are detachably connected and clamp and fix the linear telescopic adjustment member from both the upper and lower sides.

8. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 7, characterized in that, The mounting assembly also includes two parallel bracket channels; The support member includes a plurality of L-shaped steel brackets spaced apart along the telescopic axis of the linear telescopic adjustment member, and the plurality of L-shaped steel brackets are detachably connected to two bracket channel steels respectively. The clamping component includes multiple U-shaped buckles that correspond one-to-one with the multiple L-shaped steel brackets; Vertical slots are respectively opened on the inner sides of the two bracket channel steels. The two ends of each U-shaped buckle are respectively inserted into the corresponding vertical slot and connected to the corresponding L-shaped steel bracket by fastening bolts, so that the linear telescopic adjustment component is clamped and fixed by the U-shaped buckle and the L-shaped steel bracket.

9. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 8, characterized in that, A bracket brace is provided between the mounting component and the upper part of the corresponding bearing unit. One end of the bracket brace is connected to the mounting component, and the other end is detachably connected to the corresponding bearing unit through a connecting plate and a pin.

10. The alignment and control device for the post-cast concrete closure section of the bridge pier as described in claim 1, characterized in that, It also includes a control component, which is connected to the two displacement detection elements and the drive system of the two linear telescopic adjustment elements respectively; The control component is configured as follows: When the pre-cast section on the upper part of the pier is in the initial alignment state, the telescopic ends of the two linear telescopic adjustment components are respectively brought into contact with the pre-cast section on the upper part of the pier, and both linear telescopic adjustment components are in a state of no top thrust. The readings of the two displacement detection components at this time are recorded as the initial reference values. When it is detected that the pre-cast section of the upper part of the pier is offset towards the first side, the linear expansion adjustment component on the first side is identified as the jacking adjustment component, and the linear expansion adjustment component on the second side is identified as the reference detection component. The reference detection component is controlled to move along the extension direction by a preset compensation stroke without top thrust, so that a gap is formed between the telescopic end of the reference detection component and the pre-cast section of the upper part of the pier, and the position after the reference detection component is moved is determined as the detection position. The preset compensation stroke is less than the offset of the pre-cast section of the upper part of the pier towards the first side. The jacking adjustment component is controlled to apply a lateral jacking force toward the second side to the pre-cast section above the pier, while keeping the reference detection component in a state without jacking force. After the pre-cast section on the upper part of the pier moves toward the second side and abuts against the telescopic end of the reference detection piece, the telescopic displacement of the reference detection piece is continued to be detected by the displacement detection piece corresponding to the reference detection piece. When the displacement detection value of the reference detection component recovers to the same as the initial reference value or is within the preset allowable deviation range, it is determined that the pre-cast section of the upper part of the pier has recovered to the initial alignment state, and the jacking operation of the jacking adjustment component is stopped.

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