A brick-concrete cultural relic building alternating jacking synchronous control system

Abstract

The utility model provides a kind of brick and concrete historical building alternation jacking synchronous control system, it is related to building displacement engineering technical field, a kind of brick and concrete historical building alternation jacking synchronous control system, including hydraulic execution unit, monitoring unit, control unit and auxiliary support unit;The hydraulic execution unit includes jack, mechanical bolt safety device, balance valve, pressure sensor and hydraulic pump station by being divided into A, B two groups according to building axis symmetry;The monitoring unit includes pull rope displacement sensor, resistance strain gauge and wireless transmission module;The control unit includes total control console and audible-visual alarm;The auxiliary support unit includes steel pad and tray beam;Each unit is connected by hydraulic oil pipe, signal cable or wireless communication.The control system is applicable to weak longitudinal and transverse contact, low material strength brick and concrete structure historical building translation construction, through high-precision monitoring and closed-loop control, realize millimeter level accurate jacking, effectively protect historical building structure safety.

Description

Technical Field

[0001] This utility model relates to the field of building relocation engineering technology, specifically to a synchronous control system for alternating jacking of brick-concrete cultural heritage buildings. Background Technology

[0002] Due to their long history, brick-concrete structure historical buildings suffer from material degradation and poor structural integrity, making them prone to structural damage during the jacking stage of relocation construction.

[0003] Existing technologies for lifting historical buildings mostly employ synchronous or group lifting methods. However, for brick-concrete structures with weak longitudinal and lateral connections and low material strength, traditional lifting methods are prone to cumulative errors, leading to problems such as building tilting and wall cracking. Ordinary lifting systems lack control strategies specifically designed for the characteristics of brick-concrete structures, resulting in an inability to effectively protect the original structure during lifting. Therefore, it is urgent to design a high-precision, high-safety, and highly adaptable alternating lifting synchronous control system to solve the above problems. Utility Model Content

[0004] This invention aims to solve the problems of low synchronization accuracy, insufficient safety protection, and poor adaptability of existing jacking technology.

[0005] To address the aforementioned problems, this utility model provides a synchronous control system for alternating jacking of brick-concrete historical buildings, comprising a hydraulic actuator unit, a monitoring unit, a control unit, and an auxiliary support unit. The hydraulic actuator unit includes jacks symmetrically divided into groups A and B along the building's axis, a mechanical bolt safety device, a balance valve, a pressure sensor, and a hydraulic pump station. The monitoring unit includes a rope displacement sensor, a strain gauge, and a wireless transmission module. The control unit includes a main control console and an audible and visual alarm. The auxiliary support unit includes steel pads and a pallet beam. All units are connected via hydraulic pipes, signal cables, or wireless communication to collaboratively complete the synchronous control of alternating jacking.

[0006] The present invention provides a synchronous control system for alternating jacking of brick-concrete cultural relic buildings, which, compared with the prior art, has the following beneficial effects, but is not limited to: To address the issues of low synchronization accuracy, insufficient safety protection, and poor adaptability in existing jacking technologies, this system first pours a reinforced concrete jacking foundation beneath the foundation of the historical building, pre-embeds anchor bolts to secure the pallet beam, and then starts the hydraulic pump station to control two groups of 200t jacks (A and B) to simultaneously jack up by 5mm, ensuring complete contact with the pallet beam. The main control console performs a weighing operation, inputting the theoretical output force at each point, and the system automatically adjusts the pressure proportionally to achieve pressure compensation. The system controls the A group of jacks to jack up by 102mm, and the rope displacement is monitored. Sensors provide real-time height data, and the main control console monitors displacement deviation and wall strain. Lifting stops once the target is met. A 100mm steel pad is installed at the corresponding position of the B group jacks, and the hydraulic pump station is pressurized to the support load. After confirming that the B group is fully loaded, the A group jacks are retracted. A 100mm steel pad is then installed at the position of the A group jacks and pre-pressurized to ensure stable support. The B group jacks are then raised 102mm, and the above steps are repeated, alternating until the designed lifting height is reached. This alternating lifting mode of A and B groups reduces the reduction in the number of lifts per cycle. The lifting mechanism is designed to withstand the impact on the structure, taking into account the low strength characteristics of the brick-concrete structure of historical buildings, thus ensuring the stable lifting of the buildings. A hydraulic pump station powers two symmetrically arranged sets of jacks (A and B). These jacks, as the core lifting components, elevate the historical buildings. Mechanical bolt safety devices provide rigid support after the jacks are in place, and a balance valve maintains hydraulic pressure, providing double protection against falls. A rope displacement sensor captures the jack lifting height, a resistance strain gauge monitors the wall strain, and a pressure sensor collects the oil pressure. This data is transmitted in real-time to the central control console via a wireless transmission module or signal cable, proactively preventing irreversible damage caused by localized stress concentration. The central control console analyzes the monitoring data using a built-in algorithm to determine lifting synchronicity (displacement), structural safety (strain), and equipment operating conditions (pressure). The system operates in an alternating lifting mode. If the data exceeds a threshold, an audible and visual alarm is triggered, and the system automatically controls the balance valve to maintain pressure and locks the jacks, ensuring safety. This system effectively achieves millimeter-level precise lifting of brick-concrete historical buildings, effectively protecting the structural safety of the historical buildings and providing superior performance.

[0007] Furthermore, the mechanical bolt safety device is installed on the jack, and the mechanical bolt safety device includes a locking nut installed on the piston rod of the jack and a steel safety bar on the cylinder of the jack.

[0008] Furthermore, the oil circuit of the jack is connected in series through a balance valve, and the pressure sensor is installed at the inlet and outlet of the balance valve.

[0009] Furthermore, the rope displacement sensor is installed at the resultant force center of each jack group and is connected to the top of the jack piston rod via a steel wire rope.

[0010] Furthermore, the resistance strain gauge is attached to the outside of the cultural relic wall and transmits data to the main control console via a wireless transmission module.

[0011] Furthermore, the main control console is equipped with an emergency stop button and an audible and visual alarm, which are used to display jack pressure, displacement and wall strain data in real time, and support data storage and export.

[0012] Furthermore, the jack is installed at the bottom of the pallet beam, and the space between the jack and the pallet beam is filled with cement mortar.

[0013] Furthermore, the hydraulic pump station is used to simultaneously control 10 lifting points and is connected to the balance valve via hydraulic oil pipes.

[0014] Furthermore, the audible and visual alarm is electrically connected to the main control console and is used to trigger an alarm when the monitored data exceeds a set threshold.

[0015] Furthermore, the emergency stop button is a mushroom-shaped self-locking button. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the configuration of an alternating jacking synchronous control system for brick-concrete cultural relic buildings according to an embodiment of the present utility model. Figure 2 This is an installation diagram of an alternating jacking synchronous control system for brick-concrete cultural relic buildings according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the alternating lifting synchronous control system for brick-concrete cultural relic buildings, according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Jack; 2. Mechanical bolt safety device; 3. Balance valve; 4. Pressure sensor; 5. Cable displacement sensor; 6. Resistance strain gauge; 7. Main control console; 8. Steel pad block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0023] See Figures 1-3This utility model discloses a synchronous control system for alternating jacking of brick-concrete cultural relics buildings, comprising a hydraulic execution unit, a monitoring unit, a control unit, and an auxiliary support unit. The hydraulic execution unit includes jacks 1 symmetrically divided into two groups, A and B, along the building's axis; a mechanical bolt safety device 2; a balance valve 3; a pressure sensor 4; and a hydraulic pump station. The monitoring unit includes a rope displacement sensor 5; a resistance strain gauge 6; and a wireless transmission module. The control unit includes a main control console 7 and an audible and visual alarm. The auxiliary support unit includes steel pads 8 and a pallet beam. Each unit is connected via hydraulic oil pipes, signal cables, or wireless communication to collaboratively complete the synchronous control of alternating jacking.

[0024] In this embodiment, addressing the issues of low synchronization accuracy, insufficient safety protection, and poor adaptability in existing jacking technologies, this system first pours a reinforced concrete jacking foundation beneath the foundation of the historical building, pre-embeds anchor bolts to fix the pallet beam, then starts the hydraulic pump station to control two groups of 200t jacks (A and B) to synchronously jack up by 5mm, ensuring complete contact with the pallet beam; the main control console (7) performs a weighing operation, inputting the theoretical output force at each point, and the system automatically adjusts the pressure proportionally to achieve pressure compensation; jacks (A) are controlled to jack up by 102mm, and the rope is pulled... Displacement sensor 5 provides real-time height data, while the main control console 7 monitors displacement deviation and wall strain. Lifting stops once the target is met. A 100mm steel pad 8 is installed at the corresponding position of jack 1 in group B. The hydraulic pump station is pressurized to the support load. After confirming that group B is fully loaded, jack 1 in group A retracts its cylinder. A 100mm steel pad 8 is installed at the position of jack 1 in group A and pre-supported with pressure to ensure stable support. Jack 1 in group B is lifted 102mm. The above steps are repeated, alternating until the designed lifting height is reached. The lifting is then lowered using the alternating lifting mode of groups A and B. The low impact of a single jacking operation on the structure is well-suited to the low-strength characteristics of the brick-concrete structure of historical buildings, thus ensuring the stable lifting of the buildings. The hydraulic pump station powers two symmetrically arranged sets of jacks (A and B). Jacks 1, as the core lifting components, achieve the lifting of the historical buildings. Mechanical bolt safety devices (2) provide rigid support after the jacks are in place, and a balance valve (3) maintains hydraulic pressure, providing double protection against falls. A rope displacement sensor (5) captures the lifting height of jacks 1, a strain gauge (6) monitors the wall strain, and a pressure sensor (4) collects the oil pressure. Data is transmitted in real time to the main control console 7 via a wireless transmission module or signal cable, thus avoiding irreversible damage caused by local stress concentration in advance. The main control console 7 analyzes the monitoring data through a built-in algorithm to determine the jacking synchronization (displacement), structural safety (strain), and equipment condition (pressure). The system operates in an alternating jacking mode. If the data exceeds the threshold, the audible and visual alarm is triggered, and the system automatically controls the balance valve 3 to maintain pressure and locks the jack 1 to ensure safety. This effectively achieves millimeter-level precise jacking of brick-concrete cultural relics buildings, effectively protecting the structural safety of cultural relics and providing better performance.

[0025] Optional, please refer to Figure 1 The mechanical bolt safety device 2 is installed on the jack 1. The mechanical bolt safety device 2 includes a locking nut installed on the piston rod of the jack 1 and a steel bumper on the cylinder of the jack 1. The oil circuit of the jack 1 is connected in series through the balance valve 3. The pressure sensor 4 is installed at the inlet and outlet of the balance valve 3.

[0026] In this embodiment, after the jack 1 is raised to the position, the locking nut is tightened to make the bumper fit against the cylinder body, forming a rigid support to prevent hydraulic pressure loss and fall; the balance valve 3 is model 211P241A-700B, and is connected in series with each set of jacks 1; the inlet and outlet ends of the balance valve 3 are equipped with pressure sensors 4 with an accuracy of 0.1MPa, which collect oil circuit pressure data in real time and feed it back to the main control console 7, providing a data basis for output force control and safety monitoring; the balance valve 3 integrates the function of an overflow valve to realize hydraulic overload protection.

[0027] Optional, please refer to Figure 2 The rope displacement sensor 5 is installed at the resultant force center of each set of jacks 1 and is connected to the top of the piston rod of jack 1 via a steel wire rope; the resistance strain gauge 6 is attached to the key parts of the cultural relic wall (the weak parts of the cultural relic wall that are prone to cracks) and transmits data to the main control console 7 via a wireless transmission module.

[0028] In this embodiment, the rope displacement sensor 5 has a measurement range of 0-1000mm and a resolution of 0.001mm; the resistance strain gauge 6 is a BF120-3AA type with a sensitivity coefficient of 2.10±1%, and is sealed with epoxy resin for moisture protection after pasting; the wireless transmission module (10) adopts LoRa technology with a communication frequency of 433MHz.

[0029] The pull-rope displacement sensor 5 converts mechanical displacement into an electrical signal by synchronously extending and retracting the piston rod via a steel wire rope; the resistance strain gauge 6 changes resistance with the deformation of the wall, which is converted into a voltage signal by a conditioning circuit; the wireless module transmits both types of signals to the main control console 7 in real time, with a sampling frequency of 1Hz; the displacement measurement accuracy reaches 0.01mm, and the strain monitoring covers key parts of the wall (weak parts of cultural relic walls that are prone to cracking). Wireless transmission avoids wiring interference, and compared with wired monitoring, the construction flexibility is improved by 80%.

[0030] Optionally, the main control console 7 has a built-in "displacement-pressure-strain" three-closed-loop control algorithm, and is equipped with an emergency stop button and an audible and visual alarm. It is used to display the pressure, displacement and wall strain data of the jack 1 in real time, and supports data storage and export.

[0031] In this embodiment, the main control console 7 is model MGT-LSES-EN150. The main control console 7 is equipped with a 10-inch touch screen, a built-in STM32H743 main control chip, a storage capacity of 32GB, supports exporting data in Excel format via USB, and an audible and visual alarm is installed on the top of the console with adjustable alarm volume.

[0032] The three-loop algorithm performs PID regulation on displacement, pressure, and strain data respectively: the displacement loop controls the synchronization accuracy, the pressure loop controls the lifting force, and the strain loop protects the wall structure; when any parameter exceeds the threshold (displacement deviation > 3mm, pressure > 16MPa, strain > 30με), it automatically triggers pressure holding, locking, and alarm.

[0033] Optionally, the jack 1 is installed at the bottom of the pallet beam, and the space between the jack 1 and the pallet beam is filled with cement mortar.

[0034] In this embodiment, the cement mortar filling layer forms a dense structure after hardening, eliminating the gap between the jack 1 and the pallet beam, and ensuring uniform load distribution.

[0035] Optionally, the hydraulic pump station is used to simultaneously control 10 lifting points and is connected to the balance valve 3 via hydraulic oil pipes.

[0036] In this embodiment, the main control console 7 sends a proportional control signal to the hydraulic pump station based on the monitoring data. The pump station adjusts the output flow and pressure through a variable pump to provide suitable lifting power for the jack 1. The maximum output pressure of the pump station is 31.5MPa, which can meet the simultaneous control of 10 points. Compared with a small-capacity pump station, the continuous working time is increased by 3 times and the maintenance cycle is extended to 6 months.

[0037] Optionally, the wireless transmission module adopts the LoRa wireless communication protocol, with a transmission distance of ≥500m, a data transmission delay of ≤100ms, and a data sampling frequency of 1Hz.

[0038] In this embodiment, the analog signal output by the sensor is converted into a digital signal by the built-in AD converter of the module and transmitted wirelessly via the LoRa protocol. The main control console 7 receives the signal and performs digital-to-analog conversion and data processing. The transmission delay is ≤100ms, which effectively solves the problem of messy wiring on site. The transmission distance covers the construction scene of large cultural relics buildings. Compared with Bluetooth and WiFi transmission, it has stronger anti-interference ability.

[0039] Optionally, the audible and visual alarm is electrically connected to the main control console 7 and is used to trigger an alarm when the monitored data exceeds a set threshold.

[0040] In this embodiment, the alarm volume of the audible and visual alarm is adjustable from 85 to 110 dB, and the red LED flashing frequency is 2 Hz. It is connected to the output port of the main control console 7 via a relay. When the main control console 7 detects that the parameter exceeds the threshold or the equipment malfunctions, it outputs a high-level signal to trigger the alarm and locks the jack 1 in motion until the operator confirms the fault and resets it. Compared with the traditional system that only relies on screen prompts, the alarm warning is more eye-catching, and the operator's response time is shortened to 3 seconds, avoiding structural damage caused by failure to detect abnormalities in time.

[0041] Optionally, the balance valve 3 integrates the functions of a check valve and an overflow valve, and has the functions of pressure holding, heavy load first opening, proportional opening and overload protection. The overload protection pressure is set to 1.1 times the rated working pressure of the jack 1.

[0042] In this embodiment, the balance valve 3 prevents oil backflow through a one-way valve to maintain pressure and keep the pressure of the jack 1. The relief valve releases pressure when the pressure exceeds the threshold to achieve overload protection. During the descent, the system prioritizes providing pilot control pressure to the balance valve 3 corresponding to the jack 1 with the highest load pressure, causing it to open first and achieving heavy load first opening. At the same time, the control system can output a proportional electrical signal to the proportional electromagnet of the balance valve 3 according to the pressure difference at each point to precisely control the valve core opening size and achieve on-demand flow distribution.

[0043] Optionally, the threshold values ​​set for the three-closed-loop control algorithm are: displacement deviation ≤ 3mm, pressure threshold ≤ 16MPa, and strain threshold ≤ 30με. When any threshold is triggered, the balance valve 3 is automatically controlled to maintain pressure and the jack 1 is locked.

[0044] In this embodiment, the built-in algorithm of the main control console 7 adjusts the output of the hydraulic pump station by adjusting the PID parameters and comparing the monitoring data with the set threshold in real time; the displacement loop adjusts the flow rate of each group of jacks 1 to ensure that the synchronization deviation is ≤3mm; the pressure loop limits the output force of jack 1 to no more than 80% (16MPa) of the rated load; the strain loop reduces the lifting speed or stops when the wall strain approaches 30με to avoid structural damage; effectively achieving multi-dimensional precise control, compared with single parameter control, the structural protection is more comprehensive, and the risk of wall cracking during the lifting process is reduced by 90%.

[0045] Optionally, the emergency stop button is a mushroom-shaped self-locking button.

[0046] In this embodiment, the mushroom-shaped protrusion design expands the operating contact area. Combined with the internal self-locking mechanism, the button contacts remain open and locked after being pressed. It can only be reset by rotating clockwise. Operators do not need to align precisely; they can quickly locate and press the button by touch or sight. Even in chaotic, gloved, or obstructed situations, the emergency stop function can be triggered instantly, effectively shortening the emergency response time. At the same time, the self-locking mechanism avoids the risk of accidental reset, resulting in better performance.

[0047] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A synchronous control system for alternating jacking of brick-concrete historical buildings, characterized in that, It includes a hydraulic actuator unit, a monitoring unit, a control unit, and an auxiliary support unit; the hydraulic actuator unit includes jacks (1) symmetrically divided into two groups A and B along the building axis, a mechanical bolt safety device (2), a balance valve (3), a pressure sensor (4), and a hydraulic pump station; the monitoring unit includes a rope displacement sensor (5), a resistance strain gauge (6), and a wireless transmission module; the control unit includes a main control console (7) and an audible and visual alarm; the auxiliary support unit includes steel pads (8) and a pallet beam; each unit is connected through hydraulic oil pipes, signal cables, or wireless communication to collaboratively complete the alternating jacking synchronous control.

2. The alternating jacking synchronous control system for brick-concrete cultural relic buildings according to claim 1, characterized in that, The mechanical bolt safety device (2) is installed on the jack (1). The mechanical bolt safety device (2) includes a locking nut installed on the piston rod of the jack (1) and a steel safety bar on the cylinder of the jack (1).

3. The alternating jacking synchronous control system for brick-concrete historical buildings according to claim 1, characterized in that, The oil circuit of the jack (1) is connected in series through the balance valve (3), and the pressure sensor (4) is installed at the inlet and outlet of the balance valve (3).

4. The alternating jacking synchronous control system for brick-concrete cultural relic buildings according to claim 2, characterized in that, The rope displacement sensor (5) is installed at the resultant force center of each jack (1) and is connected to the top of the jack piston rod via a steel wire rope.

5. The alternating jacking synchronous control system for brick-concrete cultural relic buildings according to claim 2, characterized in that, The resistance strain gauge (6) is attached to the outside of the cultural relic wall and transmits data to the main control console (7) through a wireless transmission module.

6. The alternating jacking synchronous control system for brick-concrete historical buildings according to claim 3, characterized in that, The main control console (7) is equipped with an emergency stop button and an audible and visual alarm, which are used to display the jack pressure, displacement and wall strain data in real time.

7. The alternating jacking synchronous control system for brick-concrete historical buildings according to claim 1, characterized in that, The jack (1) is installed at the bottom of the pallet beam, and the gap between the jack (1) and the pallet beam is filled with cement mortar.

8. A synchronous control system for alternating jacking of brick-concrete historical buildings according to claim 4, characterized in that, The hydraulic pump station is used to control 10 lifting points simultaneously and is connected to the balance valve (3) via hydraulic oil pipes.

9. A synchronous control system for alternating jacking of brick-concrete historical buildings according to claim 4, characterized in that, The audible and visual alarm is electrically connected to the main control console (7) and is used to trigger an alarm when the monitored data exceeds a set threshold.

10. A synchronous control system for alternating jacking of brick-concrete historical buildings according to claim 6, characterized in that, The emergency stop button is a mushroom-shaped self-locking button.

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