A multi-stage active leveling device and method for column differential heave deformation

Abstract

The present application relates to a kind of post difference heave deformation multistage active leveling device and method, it includes steel connecting box, column end device and remote monitoring module;Steel connecting box outside is provided with reinforcing bar connector, and the reinforcing bar of horizontal support beam is connected through;Steel connecting box inside is provided with cylindrical bin, and Internet of Things signal transmission module is arranged on the upper portion of cylindrical bin, ultrasonic level gauge is arranged in the middle portion, and pad replacement controller is arranged in the bottom portion, and ultrasonic level gauge is connected by ultrasonic level gauge communication pipe, and concrete filling bin is arranged in the peripheral space of cylindrical bin in steel connecting box, and electromagnetic adsorber is arranged in the bottom portion of steel connecting box;Column end device includes jack and pad assembly, and the top support of jack is matched with the bottom portion of steel cylindrical bin;The level height of each steel connecting box is remotely monitored by Internet of Things signal transmission module, and is transmitted to remote monitoring module, and once the limit difference settlement occurs, jack top support is remotely controlled, and electromagnetic adsorption pad replacement is realized, and the grading control of post heave is realized.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a multi-stage active leveling device and method for differential heave deformation of columns. Background Technology

[0002] During the construction of deep foundation pits in soft soil and water-rich areas, the soil at the bottom of the pit will rebound and deform due to the unloading of earthwork and the pressure of water at the bottom of the pit. The columns and piles will be vertically lifted and displaced due to the friction between the piles and the soil. The foundation pit support structure generally adopts the "one column, one pile" construction method. Relative differential settlement is very likely to occur between the vertical columns of the support structure and between the columns and the diaphragm wall.

[0003] Differential heave and subsidence will cause the horizontal support structure bearing lateral axial force to experience complex stress states such as shear force and bending moment. Once the difference at the nodes exceeds the limit, it will inevitably lead to safety hazards such as cracking or even breakage of the support structure or even the reverse floor slab.

[0004] Especially for long and narrow deep foundation pits in soft soil, once a large amount of heave occurs in the vertical bearing system of the foundation pit support system, it will inevitably lead to a complex stress state of the horizontal support system that is different from the design conditions, and the potential safety risks caused are difficult to predict and control.

[0005] Currently, adaptive supports based on axial force servo technology are increasingly being used for horizontal support systems, enabling millimeter-level control of micro-deformation in the retaining walls and surrounding ground surface of foundation pits. However, deformation control for vertical support systems is mostly achieved through passive measures such as increasing pile length and strengthening joint design.

[0006] Therefore, how to provide a convenient and safe multi-stage active leveling device and method for adjusting column differential heave and deformation is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] This invention provides a multi-stage active leveling device and method for differential settlement deformation of columns. Addressing the problem of complex and unfavorable stress conditions in horizontal support structures caused by differential settlement of columns during foundation pit excavation due to soil unloading and pressurized water support, this invention designs a continuous leveling device and method for differential settlement of column piles with active leveling function. This effectively improves the stress conditions of the foundation pit support structure system, enhances the proactive control capability of foundation pit safety risks, and solves the dangers such as joint cracking caused by differential settlement of columns during foundation pit construction.

[0008] To solve the above technical problems, the present invention includes the following technical solutions:

[0009] A multi-stage active leveling device for differential heave of a column includes a steel connecting box, a column end device, and a remote monitoring module. The top of the column is connected to a horizontal support beam through a bottom groove of the steel connecting box to form a whole.

[0010] The steel connecting box is equipped with a steel bar connector on the outside, which is connected to the steel bar of the horizontal support beam. The connecting box is equipped with a cylindrical chamber. The upper part of the cylindrical chamber is equipped with an Internet of Things signal transmission module, the middle part is equipped with an ultrasonic level, and the bottom is equipped with a pad replacement controller. The ultrasonic level is connected to each other through an ultrasonic level connecting pipe. The space outside the cylindrical chamber in the steel connecting box is equipped with a concrete filling chamber. The bottom of the steel connecting box is equipped with an electromagnetic adsorber.

[0011] The column end device includes a jack and a pad assembly, with the top support of the jack engaging with the bottom of the cylindrical silo.

[0012] The IoT signal transmission module remotely monitors the level of each steel connection box and transmits the data to the remote monitoring module. In the event of excessive differential settlement, the module remotely controls the jack support and replaces the electromagnetic adsorption pad to achieve graded control of column heave and sinking.

[0013] Furthermore, the pad assembly consists of several magnetic pads.

[0014] Furthermore, the remote monitoring module includes a monitoring and early warning module, an active control module, and a signal receiver.

[0015] This invention also provides a method for continuous control of differential heave of columns, and provides a multi-stage active leveling device for differential heave deformation of columns for backup. The method includes:

[0016] Step S1: Install steel connection boxes on the top of the columns to ensure that the elevation of the top of each column is consistent. Initial leveling is performed using the pad block assembly of each column to ensure that the elevation of the steel connection boxes on the top of each column is consistent. At the same time, the ultrasonic level readings of each steel connection box are monitored remotely to ensure that the signal position range received by the signal receiver of each column is in the middle position.

[0017] Step S2: Erect the formwork and tie the horizontal support beam reinforcement. Complete the continuous connection of the reinforcement through the reinforcement connector, and use concrete to cast the horizontal support beam and the concrete filling chamber in the steel connection box in one piece.

[0018] Step S3: As the earthwork excavation progresses, differential settlement occurs between the columns. The vertical settlement value at the end of each column is measured using an ultrasonic level in the steel connection box, and the vertical settlement value is transmitted to the remote monitoring module via the Internet of Things signal transmission module.

[0019] Step S4: Monitor the differential settlement of each column in real time through the remote monitoring module. The overall situation can be determined to determine whether the differential settlement between each column exceeds the limit. If the limit is exceeded, an early warning will be issued.

[0020] Step S5: If the signal receiver indicates that the differential heave has exceeded the limit, it can be adjusted in two directions: removing the high and supplementing the low. First, for the first column with a larger relative heave, support the first jack and, with the help of the pad replacement controller, remove one layer of magnetic pads from the first pad assembly. The thickness of the magnetic pads should be consistent with the differential heave limit. Then, retract the first jack to ensure the first pad assembly is fully compressed. Second, for the second column with a smaller relative heave, activate the electromagnetic adsorption device to suspend and adsorb the second pad assembly. Support the second jack and insert a layer of magnetic pads of the appropriate height below the second pad assembly. The thickness of the magnetic pads should be consistent with the differential heave limit. Then, retract the second jack to ensure the second pad assembly is fully compressed. This two-way adjustment can achieve the leveling operation for the differential heave of multiple columns, restoring the horizontal support beam to a reasonable stress state.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] This invention provides a multi-stage active leveling device for differential settlement of columns, solving the problem of complex and unfavorable stress conditions in the horizontal support structure caused by differential settlement of columns during foundation pit excavation under the unloading of earthwork and the support of pressurized water. This multi-stage active leveling device ensures that the stress of the original reinforced concrete structure is not affected. It incorporates an ultrasonic level and a remote monitoring module to comprehensively monitor the differential settlement values ​​between a large number of columns in real time. Once differential settlement exceeds the limit through remote monitoring, it uses electromagnetic adsorption to suspend and add or remove magnetic pads in layers, achieving active raising and lowering of the vertical height of each column top for leveling. This effectively solves the problem of joint cracking or even breakage caused by differential settlement between numerous columns and between columns and the retaining structure during foundation pit construction. It can significantly improve the stress conditions of the foundation pit support structure system and enhance the proactive control capability of foundation pit safety risks. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a multi-stage active leveling device for differential heave of columns according to an embodiment of the present invention;

[0024] Figure 2 This is one of the cross-sectional schematic diagrams of the steel connecting box in the multi-stage active leveling device for differential heave of columns according to an embodiment of the present invention;

[0025] Figure 3 This is a second cross-sectional schematic diagram of the steel connecting box in the multi-stage active leveling device for differential column heave in one embodiment of the present invention.

[0026] In the picture:

[0027] 1-Ultrasonic level connecting pipe, 2-Concrete filling chamber, 3-IoT signal transmission module, 4-Pack replacement controller, 5-Rebar connector, 6-Horizontal support beam, 7-Jack, 8-Pack assembly, 9-Column, 10-Ultrasonic level base, 11-Electromagnetic adsorber, 12-Cylindrical chamber, 13-First column, 14-Second column, 15-First jack, 16-Second jack, 17-First pad assembly, 18-Second pad assembly, 19-Horizontal support beam, 20-Steel connecting box, 21-Rebar, 22-Concrete, 23-Remote monitoring module. Detailed Implementation

[0028] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a multi-stage active leveling device and method for differential heave deformation of columns provided by the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the illustration of the embodiments of the present invention. For ease of description, the terms "upper" and "lower" used below correspond to the upper and lower directions in the accompanying drawings, but this should not be construed as a limitation of the technical solution of the present invention.

[0029] Example 1

[0030] The following is combined with Figures 1 to 3 The structural composition of the multi-stage active leveling device for column differential elevation of the present invention is described in detail.

[0031] Please continue to refer to this. Figures 1 to 3 A multi-stage active leveling device for differential heave of columns includes a steel connecting box 20, a column end device, and a remote monitoring module 23. The top of the column is connected to a horizontal support beam 10 via a groove at the bottom of the steel connecting box 20 to form a whole. A steel bar connector 5 is installed on the outside of the steel connecting box 20, which is connected to the steel bars 21 of the horizontal support beam 19. A cylindrical chamber 12 is installed inside the steel connecting box 20. An Internet of Things signal transmission module 3 is installed on the upper part of the cylindrical chamber 12. An ultrasonic level is installed in the middle of the cylindrical chamber 12. A pad replacement controller 4 is installed at the bottom of the cylindrical chamber 12. The wave level instruments are connected by an ultrasonic level instrument connecting pipe 1. A concrete filling chamber 2 is set in the outer space of the cylindrical chamber 12 inside the steel connecting box. An electromagnetic adsorber 11 is set at the bottom of the steel connecting box 20. The column end device includes a jack 7 and a pad assembly 8. The top support of the jack 7 cooperates with the bottom of the cylindrical chamber 12. The Internet of Things signal transmission module 3 remotely monitors the level height of each steel connecting box 20 and transmits it to the remote monitoring module 23. Once the differential settlement exceeds the limit, the jack 7 is remotely controlled to support and the electromagnetic adsorber pad is replaced to realize the graded control of column heave and sinking.

[0032] In this embodiment, more preferably, the pad assembly 8 consists of a plurality of magnetic pads. To facilitate the addition or removal of magnetic pads, each magnetic pad has a uniform thickness.

[0033] In this embodiment, more preferably, the remote monitoring module 23 includes a monitoring and early warning module, an active control module, and a signal receiver.

[0034] Please continue to refer to this. Figures 1 to 3 The present invention also provides a method for continuous control of differential heave of columns, and provides a multi-stage active leveling device for differential heave deformation of columns for backup. The method includes:

[0035] Step S1: Install steel connection box 20 on the top of column 9 to ensure that the elevation of the top of each column is consistent. Initial leveling is performed using the pad block assembly 8 of each column 9 to ensure that the elevation of the steel connection box 20 on the top of each column is consistent. At the same time, the ultrasonic level reading of each steel connection box 20 is monitored by the remote monitoring module 23 to ensure that the signal position range received by the signal receiver of each column 9 is in the middle position.

[0036] Step S2: Erect the formwork and tie the reinforcing bars 21 of the horizontal support beam 19. Complete the through connection of the reinforcing bars 21 through the reinforcing bar connector 5, and use concrete 22 to integrally cast the concrete filling chamber 2 in the horizontal support beam 19 and the steel connection box 20.

[0037] Step S3: As the earthwork excavation progresses, differential settlement occurs between columns 9. The vertical settlement value at the end of each column is measured using an ultrasonic level in the steel connection box 20, and then transmitted to the remote monitoring module 23 via the IoT signal transmission module 3.

[0038] Step S4: Monitor the differential settlement of each column in real time through the remote monitoring module 23. It can be determined whether the differential settlement between each column exceeds the limit. If it does, an early warning will be issued.

[0039] Step S5: If the signal receiver indicates that the differential heave has exceeded the limit, it can be adjusted in two directions: first, for the first column 13 with a larger relative heave, the top support corresponds to the first jack 15, and with the help of the pad replacement controller 4, one layer of magnetic pads in the first pad assembly 17 is removed. The thickness of the magnetic pads should be consistent with the differential heave limit. Then, the first jack 15 is retrieved, so that the first pad assembly 17 is fully compressed. Second, for the second column 14 with a smaller relative heave, the electromagnetic adsorber 11 is turned on, so that the second pad assembly 18 is suspended and adsorbed. The top support corresponds to the second jack 16, and a layer of magnetic pads of the corresponding height is inserted below the second pad assembly 18. The thickness of the magnetic pads should be consistent with the differential heave limit. Then, the second jack 16 is retrieved, so that the second pad assembly 18 is fully compressed. The two-way adjustment can realize the leveling operation of the differential heave of multiple columns, so that the horizontal support beam 19 returns to a reasonable stress state.

[0040] The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. The above embodiments only illustrate several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A multi-stage active leveling device for differential heave deformation of columns, characterized in that, It includes a steel connecting box, a column end device, and a remote monitoring module. The top of the column is connected to the horizontal support beam through the bottom groove of the steel connecting box to form a whole. The steel connecting box is equipped with a steel bar connector on the outside, which is connected to the steel bar of the horizontal support beam. The connecting box is equipped with a cylindrical chamber. The upper part of the cylindrical chamber is equipped with an Internet of Things signal transmission module, the middle part is equipped with an ultrasonic level, and the bottom is equipped with a pad replacement controller. The ultrasonic level is connected to each other through an ultrasonic level connecting pipe. The space outside the cylindrical chamber in the steel connecting box is equipped with a concrete filling chamber. The bottom of the steel connecting box is equipped with an electromagnetic adsorber. The column end device includes a jack and a pad assembly. The jack's support matches the bottom of the cylindrical silo. The support corresponds to the jack, and in conjunction with the pad replacement controller, a layer of magnetic pads in the pad assembly is removed. The thickness of the magnetic pads is consistent with the differential settlement limit. Then, the jack is retracted, so that the pad assembly is fully compressed. The IoT signal transmission module remotely monitors the level of each steel connecting box and transmits it to the remote monitoring module. Once excessive differential settlement occurs, the jack support and electromagnetic adsorption pad replacement are remotely controlled to achieve graded control of column settlement.

2. The multi-stage active leveling device for differential heave deformation of columns according to claim 1, characterized in that, The pad assembly consists of several magnetic pads.

3. The multi-stage active leveling device for differential heave deformation of columns according to claim 1, characterized in that, The remote monitoring module includes a monitoring and early warning module, an active control module, and a signal receiver.

4. A method for continuous control of differential heave and subsidence of columns, characterized in that, Provide the multi-stage active leveling device for differential heave deformation of columns as described in claim 3 for use, the method comprising: Step S1: Install steel connection boxes on the top of the columns to ensure that the elevation of the top of each column is consistent. Initial leveling is performed using the pad block assembly of each column to ensure that the elevation of the steel connection boxes on the top of each column is consistent. At the same time, the ultrasonic level readings of each steel connection box are monitored remotely to ensure that the signal position range received by the signal receiver of each column is in the middle position. Step S2: Erect the formwork and tie the horizontal support beam reinforcement. Complete the continuous connection of the reinforcement through the reinforcement connector, and use concrete to cast the horizontal support beam and the concrete filling chamber in the steel connection box in one piece. Step S3: As the earthwork excavation progresses, differential settlement occurs between the columns. The vertical settlement value at the end of each column is measured using an ultrasonic level in the steel connection box, and the vertical settlement value is transmitted to the remote monitoring module via the Internet of Things signal transmission module. Step S4: Monitor the differential settlement of each column in real time through the remote monitoring module, and comprehensively determine whether the differential settlement between each column exceeds the limit. If it exceeds the limit, an early warning will be issued. Step S5: If the signal receiver indicates that the differential heave has exceeded the limit, it can be adjusted in two directions: first, for the first column with a larger relative heave, the first jack is used as a support, and a layer of magnetic pads in the first pad assembly is removed using the pad replacement controller. The thickness of the magnetic pads should be consistent with the differential heave limit. Then, the first jack is retracted, so that the first pad assembly is fully compressed. Second, for the second column with a smaller relative heave, the electromagnetic adsorption device is activated, so that the second pad assembly is suspended and adsorbed. The second jack is used as a support, and a layer of magnetic pads of the corresponding height is inserted below the second pad assembly. The thickness of the magnetic pads should be consistent with the differential heave limit. Then, the second jack is retracted, so that the second pad assembly is fully compressed. This two-way adjustment can achieve the leveling operation of differential heave of multiple columns, so that the horizontal support beam returns to a reasonable stress state.

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