Device and method for correcting deformation of splicing joint of H-shaped steel multi-limb combined supporting structure

Abstract

The invention discloses an H-shaped steel multi-limb combined supporting structure splicing joint deformation correcting device and method, and relates to the technical field of constructional engineering, and the H-shaped steel multi-limb combined supporting structure splicing joint deformation correcting device is mainly composed of a cross rod, side fixing seats, a middle fixing seat, a hydraulic telescopic rod, a connecting rod, a coupler, a connecting device, a bending detection sensor and the like. And the connecting device is connected with the two cross rods to prevent the equipment cantilever from falling and compensate the distance change of the two H-shaped steel bodies. The bending detection sensor is installed on the side face of a web of the H-shaped steel body to monitor deformation conditions in real time. When the sensor detects deformation, data are transmitted to the control system, the control system automatically adjusts the expansion and contraction amount and force of the hydraulic telescopic rod according to the deformation degree and direction, correction force is transmitted to the H-shaped steel body through the transverse rod, the connecting rod and the side fixing base, and deformation correction is achieved. The left device and the right device are symmetrically installed on the two H-shaped steel bodies to improve the anti-deformation capacity.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a device and method for correcting deformation of splicing nodes of an H-shaped steel multi-limb combined support structure. Background Art

[0002] In the field of construction engineering, especially in foundation pit engineering, H-shaped steel structures are widely used in foundation pit support. H-shaped steel is named because its cross-sectional shape is similar to the letter "H" and has good mechanical properties and economy. In foundation pit support, H-shaped steel is usually used as the main load-bearing member and can withstand large water and soil pressure. Traditional H-shaped steel support structures are usually arranged in a single row, including H-shaped steel plates and U-shaped steel plates, of which the H-shaped steel plates bear the main load-bearing role, while the U-shaped steel plates play the role of connection and water retention. Multi-limb combined support structure refers to combining multiple H-shaped steels together to form a more stable and efficient support system. Multi-limb combination can significantly improve the overall stability of the support structure and reduce the risk caused by single-limb failure. By combining multiple H-shaped steels, the bearing capacity of the support structure can be significantly improved to adapt to more complex geological conditions. Prefabricated multi-limb combined support structures usually adopt modular design, which is convenient for rapid assembly and disassembly on site and improves construction efficiency. However, in actual use, due to various reasons such as foundation pit instability and soil pressure changes, H-shaped steel structures are prone to deformation problems.

[0003] At present, there are certain limitations in the treatment methods of H-shaped steel structure deformation in traditional foundation pit support. On the one hand, there is a lack of effective measures to prevent deformation, and treatment is often carried out only after deformation occurs, which not only increases the project risk, but may also lead to construction delays and increased costs. On the other hand, when the H-shaped steel structure is deformed, the existing correction methods are usually more complicated, and the correction effect is not ideal, and it is difficult to accurately restore it to its original state. At the same time, there is a lack of accurate means to judge the deformation angle and direction of the H-shaped steel, which makes it difficult to accurately control the correction force and direction during the correction process, affecting the correction efficiency and quality.

[0004] Therefore, in order to solve the problems existing in the prior art, there is an urgent need for a device that can not only prevent H-shaped steel from deformation, but also effectively correct the deformation after it occurs, so as to improve the stability and safety of foundation pit support and reduce engineering risks and costs. Summary of the invention

[0005] The present invention provides a device and method for correcting deformation of a splicing node of an H-shaped steel multi-limb combined support structure, which can prevent deformation of the H-shaped steel and effectively correct the deformation after it occurs.

[0006] To achieve the above-mentioned purpose, the present invention provides an H-shaped steel multi-limb combined support structure splicing node deformation correction device, which includes a cross bar, a side fixed seat and a central fixed seat. The side of the central fixed seat is movably connected with a hydraulic telescopic rod, one end of the hydraulic telescopic rod is movably connected to the middle of the cross bar, and the side of the side fixed seat is fixedly installed with a connecting rod, one end of the connecting rod is connected to the two ends of the cross bar through a coupling.

[0007] In some embodiments, a connecting device is further included, with two ends of the connecting device being arranged between the two cross bars.

[0008] In some embodiments, the connecting device includes a mounting sleeve and a mounting rod, wherein the mounting rod is movably mounted on one end of the mounting sleeve, one end of the mounting sleeve is fixedly connected to one of the cross bars, and the end of the mounting rod away from the mounting sleeve is fixedly connected to the other cross bar.

[0009] In some embodiments, the side fixing seat and the central fixing seat both include a U-shaped mounting cover and bolts, the size of the U-shaped mounting cover is the same as the cross-sectional size of the H-shaped steel body, and the two sides of the U-shaped mounting cover are connected by multiple threads.

[0010] In some embodiments, an opening staggered from the connecting plate is provided in the middle of the central fixing seat, and the central fixing seat is symmetrically arranged with respect to the axis of the connecting plate.

[0011] In some embodiments, the cross bar is arranged parallel to the H-shaped steel body, and the connecting device is arranged perpendicular to the cross bar.

[0012] In some embodiments, a bending detection sensor is further included, and the bending detection sensor is arranged on the web side of the H-beam body, and the two H-beam bodies are connected by a connecting plate.

[0013] The present invention also provides a method for correcting deformation of a splicing node of an H-shaped steel multi-limb combined support structure, which specifically comprises the following steps:

[0014] S1, Equipment Installation: Fix the side fixing seat and the center fixing seat to the predetermined positions of the two H-shaped steel bodies that need to be corrected through U-shaped mounting covers and bolts to ensure that the installation is firm; flexibly connect one end of the hydraulic telescopic rod to the side of the center fixing seat, and flexibly connect the other end to the middle of the cross bar to ensure reliable connection; use a coupling to fix one end of the connecting rod to the side of the side fixing seat, and the other end to connect the two ends of the cross bar, so that the cross bar forms a stable connection with the side fixing seat and the center fixing seat; fix the installation sleeve of the connecting device on one of the cross bars, connect the installation rod flexibly into the installation sleeve, and fix the other end of the installation rod on the other cross bar, so that the connecting device is perpendicular to the cross bar and the connection is firm. At the same time, install the bending detection sensor on the side of the web of the H-shaped steel body to ensure that the sensor can accurately monitor the deformation. The left and right sets of devices need to be symmetrically installed on the two H-shaped steel bodies;

[0015] S2, deformation monitoring: turn on the bending detection sensor to monitor the deformation of the H-beam body in real time. The sensor transmits the collected deformation data to the control system;

[0016] S3, correction operation: After receiving the deformation data, the control system analyzes the deformation degree and direction according to the preset algorithm, automatically and accurately adjusts the extension and extension amount and strength of the hydraulic telescopic rod. The hydraulic telescopic rod pushes the cross bar, and the correction force is stably transmitted to the H-beam body through the force transmission structure composed of the cross bar, connecting rod and side fixing seat, so as to realize the correction of the deformed part;

[0017] S4, subsequent adjustment: During the correction process, the connection device compensates in real time for the change in the distance between the two H-beam bodies caused by the correction force or other factors, avoiding the cantilever of the equipment from falling and ensuring that the correction work is carried out continuously and stably until the deformation of the H-beam body returns to the preset standard range.

[0018] Compared with the related art, the H-shaped steel multi-limb combined support structure splicing node deformation correction device and method provided by the present invention have the following beneficial effects:

[0019] The present invention provides an H-shaped steel structure foundation pit deformation correction device, which is mainly composed of a cross bar, a side fixing seat, a central fixing seat, a hydraulic telescopic rod, a connecting rod, a coupling, a connecting device and a bending detection sensor. During operation, the side fixing seat and the central fixing seat are fixed to the H-shaped steel body through a U-shaped mounting cover and bolts, one end of the hydraulic telescopic rod is connected to the central fixing seat, and the other end is connected to the middle of the cross bar, and the connecting rod connects the side fixing seat and the two ends of the cross bar. The connecting device connects the two cross bars to prevent the cantilever of the equipment from falling and compensate for the change in the spacing between the two H-shaped steel bodies. The bending detection sensor is installed on the side of the web of the H-shaped steel body to monitor the deformation in real time. When the sensor detects deformation, the data is transmitted to the control system, and the control system automatically adjusts the telescopic amount and strength of the hydraulic telescopic rod according to the degree and direction of deformation, and transmits the correction force to the H-shaped steel body through the cross bar, the connecting rod and the side fixing seat to realize the correction of deformation. The left and right sets of devices are symmetrically installed on the two H-shaped steel bodies to improve the anti-deformation ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional assembly of the structure of the present invention;

[0022] Figure 3 It is a schematic top view of the structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the installation structure of the bending detection sensor of the present invention;

[0024] Figure 5 This is a model diagram of the present invention without the correction device installed;

[0025] Figure 6 A mesh division diagram of the model of the present invention without the correction device installed;

[0026] Figure 7 A schematic diagram of a model of the present invention without a correction device installed with a static load;

[0027] Figure 8 A model diagram of the present invention with a correction device installed;

[0028] Fig. 9 A grid division diagram of a model of an additional correction device of the present invention;

[0029] Fig.10 A schematic diagram of a model of the present invention equipped with a correction device and loaded with a static load;

[0030] Fig.11 This is a comparison diagram of the deformation before and after loading the correction device of the present invention;

[0031] Fig.12 This is a schematic diagram of the structure of the mounting rod and the mounting sleeve after the correction device is loaded in the present invention.

[0032] Numbers in the figure: 1, connecting device; 2, cross bar; 3, connecting rod; 4, side fixing seat; 5, hydraulic telescopic rod; 6, middle fixing seat; 7, coupling; 8, bending detection sensor; 100, H-beam body; 101, connecting plate. DETAILED DESCRIPTION

[0033] Embodiment 1

[0034] This embodiment provides a device and method for correcting deformation of a splicing node of an H-shaped steel multi-limb combined support structure, such as Figure 1-4As shown, the present invention includes a cross bar 2, a side fixing seat 4 and a central fixing seat 6, the side of the central fixing seat 6 is movably connected with a hydraulic telescopic rod 5, one end of the hydraulic telescopic rod 5 is movably connected to the middle of the cross bar 2, and the side of the side fixing seat 4 is fixedly installed with a connecting rod 3, one end of which is connected to the two ends of the cross bar 2 through a coupling 7. It also includes a connecting device 1, the two ends of which are arranged between the two cross bars 2. The connecting device 1 includes a mounting sleeve and a mounting rod, the mounting rod is movably sleeved on one end of the mounting sleeve, one end of the mounting sleeve is fixedly connected to one of the cross bars 2, and the end of the mounting rod away from the mounting sleeve is fixedly connected to the other cross bar 2. The side fixing seat 4 and the central fixing seat 6 both include a U-shaped mounting cover and a bolt, the size of the U-shaped mounting cover is the same as the cross-sectional size of the H-shaped steel body 100, and the two sides of the U-shaped mounting cover are connected by multiple threads. The middle of the central fixing seat 6 is provided with an opening staggered with the connecting plate 101, and the central fixing seat 6 is symmetrically arranged with the axis of the connecting plate 101. The crossbar 2 is arranged parallel to the H-beam body 100, and the connecting device 1 is arranged perpendicular to the crossbar 2. A bending detection sensor 8 is also included, and the bending detection sensor 8 is arranged on the web side of the H-beam body 100. The two H-beam bodies 100 are connected by a connecting plate 101.

[0035] Among them, the rubber gasket is added to the inner side of the U-shaped mounting cover, which can increase the friction with the H-shaped steel body 100 and improve the stability of the fixing seat on the one hand; on the other hand, it can play a buffering role and reduce the damage to the H-shaped steel during the correction process. The bolts are made of high-strength stainless steel bolts, and anti-loosening gaskets are set on the bolt heads to prevent the bolts from loosening during use. In addition, reinforcing ribs can be set on both sides of the U-shaped mounting cover to improve the overall strength of the fixing seat.

[0036] A wireless communication module is added to the correction device to transmit the data detected by the bending detection sensor 8 to the remote monitoring center in real time. Construction personnel can check the deformation of the H-shaped steel and the working status of the correction device at any time through terminal devices such as mobile phones and tablets to achieve remote monitoring and management. When the bending detection sensor 8 detects that the deformation of the H-shaped steel exceeds a certain threshold, the correction device automatically sends an alarm signal to remind the construction personnel to take timely measures. The alarm method can adopt sound and light alarm to ensure that it can attract the attention of construction personnel even in a noisy construction site. At the same time, the alarm signal can be transmitted to the remote monitoring center through the wireless communication module so that the management personnel can understand the situation in time and make corresponding arrangements. The correction device is equipped with a data recording module that can record the deformation history data of the H-shaped steel and the working parameters of the correction device. Construction personnel can analyze these data through data analysis software to understand the deformation law of the H-shaped steel and the performance characteristics of the correction device, providing a reference for subsequent construction.

[0037] In this embodiment, firstly, the installation of the device is completed according to the following steps.

[0038] 1. First, install the U-shaped mounting covers of the side fixing seat 4 and the middle fixing seat 6 at the predetermined positions of the H-shaped steel body 100 respectively, and fix them tightly with bolts to ensure that the U-shaped mounting covers completely match the cross-sectional dimensions of the H-shaped steel without loosening or displacement.

[0039] Second, one end of the hydraulic telescopic rod 5 is movably connected to the side of the central fixed seat 6, and the other end is movably connected to the middle of the cross bar 2 to ensure that the connection part can be flexibly rotated to meet the correction force requirements in different directions.

[0040] 3. The connecting rods 3 on the sides of the two side fixing seats 4 are connected to the two ends of the cross bar 2 through the coupling 7.

[0041] Fourth, the installation sleeve and the installation rod of the connection device 1 are fixedly connected to the two cross bars 2 respectively, ensuring that the connection device 1 and the cross bars 2 are vertically arranged, and the cross bars 2 and the H-shaped steel body 100 are parallelly arranged.

[0042] 5. A bending detection sensor 8 is installed on the side of the web of the H-beam body 100 to monitor the deformation of the H-beam in real time.

[0043] The left and right sets of correction devices are symmetrically installed between the joints of the two H-beams, which greatly improves the ability to prevent deformation. When soil pressure or other external forces act on the H-beam, the correction devices on both sides can share the external forces and reduce the risk of deformation of the H-beam.

[0044] The connection device 1 can not only prevent the equipment cantilever from falling without support, but also compensate when the spacing between the two H-beams changes. For example, when the H-beam is slightly deformed by lateral pressure, the connection device 1 can adapt to the spacing change by extending and retracting the mounting rod in the mounting sleeve, thereby maintaining the stability of the entire device.

[0045] When the bending detection sensor 8 detects that the H-shaped steel is deformed, the sensor transmits data to the control system, which automatically adjusts the extension amount and strength of the hydraulic telescopic rod 5 according to the degree and direction of the deformation.

[0046] The hydraulic telescopic rod 5 transmits the correction force to the H-beam through the crossbar 2, the connecting rod 3 and the side fixing seat 4, gradually restoring the deformed H-beam to its original state. During the correction process, the control system receives the feedback data from the bending detection sensor 8 in real time, and continuously adjusts the correction force to ensure the accuracy and effectiveness of the correction.

[0047] ANSYS analysis and effect description:

[0048] 1. Simulation analysis without correction device

[0049] like Figure 5-7 As shown in the figure, an H-shaped steel structure foundation pit model is established using ANSYS software to simulate the deformation of the H-shaped steel under the external force of soil pressure changes. Assuming that the soil pressure gradually increases, the H-shaped steel is loaded with a pressure of 40,000N in the Y-axis direction at the B end without any correction device, and the maximum displacement at the B end is 328.46mm.

[0050] Through simulation analysis, it can be found that the deformation angle and direction of H-beam will vary according to the external force. Due to the lack of effective prevention and correction measures, the deformation of H-beam may lead to the instability of the foundation pit support structure and increase the engineering risk.

[0051] 2. Simulation analysis after installing the correction device

[0052] like Figure 8-10 As shown in the figure, in the same foundation pit model, the H-shaped steel structure foundation pit deformation correction device of the present invention is installed. The deformation of the H-shaped steel under the external force such as soil pressure change is simulated again. The Y-axis direction of the B end is also loaded with a pressure of 40000N, and the maximum displacement of the B end is 282.76mm.

[0053] When the soil pressure starts to act, the bending detection sensor 8 can quickly detect the slight deformation of the H-beam and transmit the data to the control system. The control system immediately starts the hydraulic telescopic rod 5 to apply a corrective force to the H-beam.

[0054] Fig.11 The following is a comparison of the deformation before and after loading the correction device. After 30 tons of pressure, the mounting rod and the mounting sleeve in the connection device 1 are in contact and reach the limit. The simulation results show that the deformation of the H-beam is effectively controlled under the action of the correction device. Even if the soil pressure continues to increase, the correction device can adjust the correction force in real time according to the deformation situation to ensure that the H-beam always remains within a safe deformation range.

[0055] In addition, the connection device 1 also played an important role in the simulation. When the distance between the two H-beams changes, the connection device 1 can compensate in time to maintain the stability of the entire device. At the same time, the synergy of the left and right correction devices further improves the ability to prevent deformation.

[0056] In summary, through simulation of ANSYS analysis, the H-shaped steel structure foundation pit deformation correction device of the present invention can effectively prevent H-shaped steel deformation and perform rapid and accurate correction after deformation occurs, compared with the case where no correction device is installed, thereby greatly improving the stability and safety of foundation pit support and reducing engineering risks and costs.

[0057] Working principle: The H-shaped steel structure foundation pit deformation correction device is mainly composed of a cross bar 2, a side fixing seat 4, a middle fixing seat 6, a hydraulic telescopic rod 5, a connecting rod 3, a coupling 7, a connecting device 1 and a bending detection sensor 8. During operation, the side fixing seat 4 and the middle fixing seat 6 are fixed to the H-shaped steel body 100 through a U-shaped mounting cover and bolts. One end of the hydraulic telescopic rod 5 is connected to the middle fixing seat 6, and the other end is connected to the middle of the cross bar 2. The connecting rod 3 connects the side fixing seat 4 and the two ends of the cross bar 2. The connecting device 1 connects the two cross bars 2 to prevent the cantilever of the equipment from falling and compensate for the change in the spacing between the two H-shaped steel bodies 100. The bending detection sensor 8 is installed on the side of the web of the H-shaped steel body 100 to monitor the deformation in real time. When the sensor detects deformation, it transmits data to the control system. The control system automatically adjusts the extension and force of the hydraulic telescopic rod 5 according to the degree and direction of deformation, and transmits the correction force to the H-beam body 100 through the cross bar 2, the connecting rod 3 and the side fixing seat 4 to correct the deformation. The left and right sets of devices are symmetrically installed on the two H-beam bodies 100 to enhance the anti-deformation capability.

Claims

1. H-shaped steel multi-limb combined support structure splicing node deformation correction device and method, characterized in that: It includes a cross bar, a side fixing seat and a central fixing seat. The side of the central fixing seat is movably connected with a hydraulic telescopic rod, one end of the hydraulic telescopic rod is movably connected to the middle of the cross bar, and the side of the side fixing seat is fixedly installed with a connecting rod, one end of the connecting rod is connected to the two ends of the cross bar through a coupling.

2. The device and method for correcting deformation of splicing nodes of H-beam multi-limb combined support structure according to claim 1 is characterized in that: Also included is a connecting device, with two ends of the connecting device arranged between the two cross bars.

3. The device and method for correcting deformation of splicing nodes of H-beam multi-limb combined support structure according to claim 2 is characterized in that: The connecting device comprises a mounting sleeve and a mounting rod, wherein the mounting rod is movably sleeved on one end of the mounting sleeve, one end of the mounting sleeve is fixedly connected to one of the cross bars, and one end of the mounting rod away from the mounting sleeve is fixedly connected to the other cross bar.

4. The device and method for correcting deformation of splicing nodes of H-beam multi-limb combined support structure according to claim 1 is characterized in that: The side fixing seat and the middle fixing seat both include a U-shaped mounting cover and bolts. The size of the U-shaped mounting cover is the same as the cross-sectional size of the H-shaped steel body. The two sides of the U-shaped mounting cover are connected by a plurality of threads.

5. The device and method for correcting deformation of splicing nodes of H-beam multi-limb combined support structure according to claim 4 is characterized in that: An opening staggered from the connecting plate is provided in the middle of the central fixing seat, and the central fixing seat is symmetrically arranged with respect to the axis of the connecting plate.

6. The device and method for correcting deformation of splicing nodes of H-beam multi-limb combined support structure according to claim 2 is characterized in that: The cross bar is arranged parallel to the H-shaped steel body, and the connecting device is arranged perpendicular to the cross bar.

7. The device and method for correcting deformation of splicing nodes of H-beam multi-limb combined support structure according to claim 1 is characterized in that: It also includes a bending detection sensor, which is arranged on the side of the web of the H-shaped steel body. The two H-shaped steel bodies are connected by a connecting plate.

8. A correction method using the H-beam multi-limb combined support structure splicing node deformation correction device as described in any one of claims 1 to 7, characterized in that: The specific steps include: S1, Equipment Installation: Fix the side fixing seat and the center fixing seat to the predetermined positions of the two H-shaped steel bodies that need to be corrected through U-shaped mounting covers and bolts to ensure that the installation is firm; flexibly connect one end of the hydraulic telescopic rod to the side of the center fixing seat, and flexibly connect the other end to the middle of the cross bar to ensure reliable connection; use a coupling to fix one end of the connecting rod to the side of the side fixing seat, and the other end to connect the two ends of the cross bar, so that the cross bar forms a stable connection with the side fixing seat and the center fixing seat; fix the installation sleeve of the connecting device on one of the cross bars, connect the installation rod flexibly into the installation sleeve, and fix the other end of the installation rod on the other cross bar, so that the connecting device is perpendicular to the cross bar and the connection is firm. At the same time, install the bending detection sensor on the side of the web of the H-shaped steel body to ensure that the sensor can accurately monitor the deformation. The left and right sets of devices need to be symmetrically installed on the two H-shaped steel bodies; S2, deformation monitoring: turn on the bending detection sensor to monitor the deformation of the H-beam body in real time. The sensor transmits the collected deformation data to the control system; S3, correction operation: After receiving the deformation data, the control system analyzes the deformation degree and direction according to the preset algorithm, automatically and accurately adjusts the extension and extension amount and strength of the hydraulic telescopic rod. The hydraulic telescopic rod pushes the cross bar, and the correction force is stably transmitted to the H-beam body through the force transmission structure composed of the cross bar, connecting rod and side fixing seat, so as to realize the correction of the deformed part; S4, subsequent adjustment: During the correction process, the connection device compensates in real time for the change in the distance between the two H-beam bodies caused by the correction force or other factors, avoiding the cantilever of the equipment from falling and ensuring that the correction work is carried out continuously and stably until the deformation of the H-beam body returns to the preset standard range.

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