CN116657670A - Foundation pit side wall displacement control method and system - Google Patents
Foundation pit side wall displacement control method and system Download PDFInfo
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- CN116657670A CN116657670A CN202310933390.7A CN202310933390A CN116657670A CN 116657670 A CN116657670 A CN 116657670A CN 202310933390 A CN202310933390 A CN 202310933390A CN 116657670 A CN116657670 A CN 116657670A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 137
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- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B31/00—Predictive alarm systems characterised by extrapolation or other computation using updated historic data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
Abstract
The application relates to a method and a system for controlling displacement of a side wall of a foundation pit, wherein the method comprises the steps of measuring horizontal displacement of a side wall supporting pile of the foundation pit within the depth range of the foundation pit and supporting axial force of the supporting pile in real time, and if the horizontal displacement or the supporting axial force exceeds a preset displacement alarm value, changing the supporting axial force of the supporting pile by increasing or unloading so as to control the horizontal displacement and the supporting axial force of the supporting pile of the side wall of the foundation pit to be always within the alarm values. The method and the system combine the flexible horizontal displacement measuring device and the counter-force pushing device of the side wall of the foundation pit, regulate and control the supporting shaft force in real time according to the current situation of the horizontal displacement of the foundation pit and the current situation of the supporting shaft force, dynamically adjust the magnitude and the distribution of the supporting shaft force, ensure that the horizontal displacement of the supporting structure and the supporting shaft force are always in the alarm values of the supporting structure and the supporting shaft force, avoid exceeding the limit value required by the standard and ensure the stability and the safety of the side wall of the foundation pit.
Description
Technical Field
The application relates to the technical field of geotechnical engineering, in particular to a foundation pit side wall displacement control method and system.
Background
Deep foundation pit engineering is a dangerous engineering, collapse and capsizing of a foundation pit often occur within a few minutes, and if personnel cannot evacuate in time, huge economic loss and personnel injury are caused. In order to ensure the safety and stability of foundation pit engineering, the lateral displacement of the foundation pit must be monitored and controlled in real time.
Currently, some deep foundation pit real-time monitoring devices, such as chinese patent CN110468888A, disclose a device and a method for monitoring displacement of a pile body of a miniature steel pipe pile. According to the device, the base of the reflector is welded at the preset position of the steel pipe pile, the reflector is adhered to the rectangular supporting plate at the end head, and the displacement and deformation of the pile body are monitored at any time in the foundation pit excavation process. The device has the advantages of simple structure, low cost, convenient construction, manpower and material resource saving and the like, can monitor the displacement of the miniature steel pipe pile in real time, not only ensures the construction quality and safety, but also provides reference value for engineering practice.
However, these existing monitoring devices can only realize real-time monitoring and early warning of the foundation pit side wall displacement and the supporting shaft force, but cannot realize automatic control of the supporting shaft force. The supporting shaft force to be added or unloaded is calculated manually according to the monitoring result, and whether the foundation pit lateral displacement value meets the specification and the design requirement is checked again after the supporting shaft force is adjusted. The method for manually monitoring and controlling the lateral displacement of the foundation pit is huge in time and labor, and the optimal repairing period is often misplaced.
Accordingly, there is a need for a method and system that can automatically monitor and control the lateral displacement of a foundation pit.
Disclosure of Invention
The application provides a method and a system for controlling displacement of a side wall of a foundation pit, which solve the problems that in the prior art, a real-time monitoring device of a deep foundation pit cannot realize automatic control of supporting shaft force and needs manual intervention and calculation.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
according to the foundation pit side wall displacement control method, a flexible horizontal displacement measuring device is arranged in a foundation pit side wall supporting pile, the horizontal displacement of the foundation pit side wall supporting pile in the depth range of the foundation pit is measured in real time, and if the horizontal displacement exceeds a preset displacement alarm value, the horizontal displacement of the supporting pile is controlled to be always within the displacement alarm value by increasing or unloading the supporting shaft force born by the supporting pile at the excessive displacement position.
Further, a plurality of supporting shaft forces born by the supporting piles on the side wall of the foundation pit are measured in real time, and if the supporting shaft forces exceed a preset shaft force alarm value, the supporting shaft forces born by the supporting piles on the overmuch stressed position are increased or unloaded, so that the supporting shaft forces of the supporting piles are controlled to be always within the shaft force alarm value.
Further, the method comprises the steps of:
the flexible horizontal displacement measuring device measures the horizontal displacement of the support pile in the depth range of the foundation pit in real time, and feeds back the horizontal displacement data to the operation control center;
the shaft force meters measure the supporting shaft force of the plurality of groups of transverse supports acting on the supporting piles in real time, and feed back supporting shaft force data to the operation control center;
the operation control center judges whether the horizontal displacement or the supporting shaft force measured in real time exceeds a preset displacement alarm value or not and judges whether the supporting shaft force exceeds a preset shaft force alarm value or not;
if the horizontal displacement and the supporting shaft force measured in real time do not exceed the alarm values of the horizontal displacement and the supporting shaft force, continuing to measure and monitor;
and if the horizontal displacement or the supporting shaft force measured in real time exceeds the alarm value of the horizontal displacement or the supporting shaft force, activating a counter-force pushing device at a corresponding position, wherein the counter-force pushing device is progressively increased or progressively unloaded under the drive of a numerical control pump station so as to change the supporting shaft force born by the supporting pile, thereby controlling the horizontal displacement and the supporting shaft force of the supporting pile on the side wall of the foundation pit to be always within the alarm value of the horizontal displacement and the supporting shaft force.
Further, if the current supporting axial force Fx measured in real time exceeds the axial force alarm value Fv, activating the counter-force pushing device at the corresponding position, specifically including:
the counter-force pushing device at the excess stress position progressively increases or progressively unloads the load of the size of the Fx-Fv under the drive of the numerical control pump station, so that the supporting axial force of each part of the supporting pile is within the axial force alarm value.
Further, if the current horizontal displacement Sx measured in real time exceeds the displacement alarm value Sv, activating the reaction pushing device at the corresponding position, specifically including:
the flexible horizontal displacement measuring device measures the current situation horizontal displacement Sx of each supporting pile in real time;
the shaft force meters measure the current supporting shaft force Fx of the counter-force pushing device on the supporting pile in real time;
calculating the axial force Fv-fx|ofthe support pile required to be applied or unloaded by each counter-force pushing device after the current horizontal displacement Sx of the support pile reaches a displacement alarm value Sv through an analytic method or a numerical method;
generating a relation diagram of lateral displacement of the foundation pit and axial force of each support;
based on the relation diagram of the foundation pit lateral displacement and each supporting shaft force, the numerical control pump station automatically increases or unloads the load of the size of Fv-Fx in a progressive manner, and the operation control center judges whether the horizontal displacement still exceeds an alarm value in real time so as to adjust the supporting shaft force in real time.
Further, the operation control center is a cloud platform.
On the other hand, the application provides a foundation pit side wall displacement control system, which comprises a support pile arranged on the foundation pit side wall, and is characterized in that the inner side of the foundation pit side wall support pile is horizontally connected with a plurality of counter-force thrusters, each counter-force thruster comprises a transverse support, a shaft force meter and a hydraulic driving device, the shaft force meter is arranged at the joint of the transverse support and the support pile, the transverse support is connected with the hydraulic driving device, and the hydraulic driving device is connected with a numerical control pump station;
the support pile is provided with a flexible horizontal displacement measuring device in the whole pile body;
the flexible horizontal displacement measuring device, the axial force meter and the numerical control pump station are connected with the operation control center.
Further, the operation control center is a cloud platform.
In another aspect, the present application provides an electronic device for controlling displacement of a side wall of a foundation pit, including:
at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, which are called by the processor to perform the control method described above.
In another aspect, the present application provides a storage medium for controlling displacement of a side wall of a foundation pit, where the storage medium includes a stored program, and the program implements the control method when executed by a processor.
Compared with the prior art, the application has the following beneficial effects:
1. according to the method and the system provided by the embodiment of the application, the flexible horizontal displacement measuring device and the counter-force pushing device of the side wall of the foundation pit are combined together to form the double-control system, the supporting shaft force is regulated and controlled in real time through the current situation of the horizontal displacement of the foundation pit and the current situation of the supporting shaft force, the size and the distribution of the supporting shaft force are dynamically regulated, the horizontal displacement of the supporting structure and the supporting shaft force are always in the alarm values of the supporting structure, the limit value exceeding the standard requirement is avoided, and the stability and the safety of the side wall of the foundation pit are ensured.
2. The method and the system of the embodiment of the application improve the efficiency and quality of foundation pit construction through unmanned monitoring and control, reduce the workload and error of manual intervention and calculation, realize intelligent control of the displacement of the side wall of the foundation pit, and reduce construction risk and cost.
3. The method and the system of the embodiment of the application adopt the cloud platform as an operation control center, can realize remote monitoring and control, realize real-time monitoring, early warning, regulation and control and optimization of the displacement of the side wall of the foundation pit by using the Internet technology and big data analysis, improve the construction intelligence and informatization level, enhance the construction adaptability and the flexibility, improve the data sharing and transmission speed, and facilitate construction management and decision.
It is, of course, not necessary for all of the above advantages to be achieved simultaneously in the practice of the various aspects of the application.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the method of embodiment 1 of the present application;
FIG. 2 is a graph of foundation pit lateral displacement versus support shaft force for example 1;
FIG. 3 is a schematic cross-sectional view of the construction site principle of embodiment 2 of the present application;
fig. 4 is a schematic physical structure of an electronic device according to embodiment 3 of the present application.
In the figure, the device comprises a 1-excavation surface, a 2-planned station structure, a 3-support pile, a 4-flexible horizontal displacement measuring device, a 5-concrete crown beam, a 6-retaining wall, a 7-transverse support, an 8-axial force meter, a 9-numerical control pump station, a 10-cloud platform, a 301-processor, a 302-communication interface, a 303-memory and a 304-bus.
Detailed Description
The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
The numbering of the components itself, e.g., "S1", "S2", etc., is used herein only to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
Example 1:
the application relates to a foundation pit side wall displacement control method, which is used for measuring horizontal displacement of a foundation pit side wall supporting pile in a depth range of a foundation pit and supporting axial force of the supporting pile in real time, and if the horizontal displacement or the supporting axial force exceeds a preset displacement alarm value, changing the supporting axial force borne by the supporting pile by increasing or unloading so as to control the horizontal displacement and the supporting axial force of the foundation pit side wall supporting pile to be always in the alarm values.
Specifically, referring to fig. 1, the control method of the present embodiment specifically includes the following steps:
s1, the flexible horizontal displacement measuring device measures the horizontal displacement of the foundation pit side wall supporting pile in the depth range of the foundation pit in real time, and feeds back horizontal displacement data to the operation control center, wherein in the embodiment, the operation control center is a cloud platform, and remote monitoring and control of the foundation pit can be realized by utilizing an Internet technology and big data analysis.
S2, measuring supporting shaft force in real time by a plurality of shaft force meters, and feeding back supporting shaft force data to the cloud platform.
And S3, the cloud platform judges whether the horizontal displacement and the supporting axial force exceed preset displacement and axial force alarm values.
And S4, if the horizontal displacement and the supporting shaft force do not exceed the alarm values, continuing to measure and monitor.
And S5, if at least one of the horizontal displacement and the supporting shaft force exceeds the alarm value of the horizontal displacement and the supporting shaft force, activating a counter-force pushing device at a corresponding position, and progressively increasing or progressively unloading the counter-force pushing device under the drive of the numerical control pump station so as to change the supporting shaft force borne by the supporting pile, thereby controlling the horizontal displacement and the supporting shaft force of the supporting pile to be always within the alarm values of the horizontal displacement and the supporting shaft force.
According to the technical specification of urban rail transit engineering monitoring, engineering personnel design the maximum limit value of the horizontal displacement of the support pile and the maximum limit value of the bearing support shaft force, and design corresponding alarm values according to the percentage reaching the maximum limit value, wherein the alarm values can be a range of intervals, exceed the upper limit of the range or are lower than the lower limit of the range, namely trigger an alarm.
In this embodiment, the alarm value is divided into an axial force alarm value Fv and a displacement alarm value Sv.
In the above S5, if the current supporting axial force Fx measured in real time is not within the range of the axial force alarm value Fv, the reaction pushing device at the corresponding position is activated, which specifically includes:
the counter-force pushing device at the excess stress part progressively increases or progressively unloads the load under the drive of the numerical control pump station, and the total increased or unloaded load is i Fv-Fx, so that the supporting axial force of each part of the supporting pile is within the axial force alarm value.
In the above S5, if the current horizontal displacement Sx measured in real time is not within the displacement alarm value Sv range, activating the counter-force pushing device at the corresponding position specifically includes:
s6, the flexible horizontal displacement measuring device measures the current situation horizontal displacement Sx of each supporting pile in real time;
s7, each axial force meter measures the current supporting axial force Fx of the counter-force pushing device acting on the supporting pile in real time;
s8, referring to FIG. 2, generating a relation diagram of foundation pit lateral displacement and supporting shaft force, based on the relation diagram of foundation pit lateral displacement and supporting shaft force of each channel, the cloud platform predicts that the supporting pile reaches a displacement alarm value Sv from the current horizontal displacement Sx by an analytic method or a numerical method, the numerical control pump station increases or unloads load-Fv-Fx-l, the numerical control pump station increases or unloads load progressively, the total increased or unloaded load-Fv-Fx-l, and the cloud platform judges whether the horizontal displacement is still not in the alarm value in real time so as to further adjust the supporting shaft force in real time.
S9, based on a large number of cases of different working condition geology, the cloud platform performs machine learning, generates relative relations of parameters such as supporting axial force, supporting vertical distance, water level line and the like of each place, gives out supporting axial force values corresponding to the foundation pit horizontal displacement reaching a standard limit value, provides data support for design and construction staff, and provides threshold standards for similar foundation pit monitoring.
In other embodiments, the alarm value may also be defined as a range of intervals of a plurality of different levels. The range of the intervals with a plurality of different grades is contained in the whole monitoring and early warning system. The monitoring and early warning system can correspond to different state grades such as a red warning state, a yellow early warning state, a blue normal state, a green basic stable state, a white stable state and the like according to the deformation of the foundation pit supporting structure and the surrounding environment and the safety control requirement. When the current support shaft force Fx and the current horizontal displacement Sx of the monitoring data reach or exceed the monitoring early warning value corresponding to the yellow early warning state, the system can automatically alarm and drive the counter-force pushing device to take corresponding adjustment measures.
Example 2:
referring to fig. 3, fig. 3 discloses a schematic diagram of a specific foundation pit side wall displacement construction site, wherein a station structure 2 is planned to be built above a foundation pit excavation surface 1, a support pile 3 is arranged on the foundation pit side wall, a flexible horizontal displacement measuring device 4 is arranged on the support pile 3 within the depth range of the foundation pit, a concrete crown beam 5 is arranged at the upper end of the support pile 3, and a retaining wall 6 is arranged on the concrete crown beam 5; three transverse supports 7 are horizontally arranged on the outer side of the support pile 3, an axial force meter 8 is arranged at the joint of the three transverse supports 7 and the support pile, and each axial force meter 8 is connected with a numerical control pump station 9; the flexible horizontal displacement measuring device 4, the axial force meter 8 and the numerical control pump station 9 are connected with the cloud platform 10 and can perform data interaction with the cloud platform. In this embodiment, the cross support 7 is a steel support, and in other embodiments, the cross support 7 is a concrete support.
Each counter-force pushing device comprises a transverse support 7, an axial force meter 8 and a hydraulic driving device, and a numerical control pump station 9 automatically increases or unloads working oil pressure of the hydraulic driving device according to instructions given by a cloud platform, so that the transverse support 7 is driven to apply different support axial forces to foundation pit support piles, and automatic foundation pit risk monitoring and axial force control are achieved.
Referring to fig. 3, for the three counter-force thrusters, θx1, θx2, θx3 are numerical control pump stations for supporting the horizontal displacement variation value of the pile after increasing or unloading the supporting axial force; θy1, θy2, θy3 are the axial force values added or unloaded by the numerical control pump station; x1, x2 and x3 are current horizontal displacement values of the support piles; y1, y2 and y3 are current axial force values of the support piles.
The change value of the horizontal displacement value of the support pile and the axial force value of the digital control pump station for increasing or unloading can be expressed by the following equations, namely, θy1+y1=f (x1+θx1), θy2+y2=f (x2+θx2), and θy3+y3=f (x3+θx3), and the axial force values of θy1=f (x1+θx1) -y1, θy2=f (x2+θx2) -y2, and θy3=f (x3+θx3) -y3, which are needed to be applied or unloaded by the digital control pump station, can be obtained through numerical simulation after engineering statistical data.
Example 3:
the embodiment relates to an electronic device for controlling displacement of a side wall of a foundation pit, and fig. 4 is a schematic physical structure diagram of the electronic device according to an embodiment of the present application, where the electronic device may include: processor 301, communication interface (Communications Interface) 302, memory (memory) 303 and bus 304, wherein processor 301, communication interface 302, memory 303 complete communication with each other through bus 304. Processor 301 may invoke a computer program stored in memory 303 and executable on processor 301 to perform a foundation pit sidewall displacement control method provided in embodiment 1 above. Examples include: and measuring the horizontal displacement of the foundation pit side wall supporting pile in the depth range of the foundation pit and the supporting shaft force of the supporting pile in real time, and if the horizontal displacement or the supporting shaft force exceeds the preset displacement alarm value, changing the supporting shaft force borne by the supporting pile by increasing or unloading, thereby controlling the horizontal displacement and the supporting shaft force of the foundation pit side wall supporting pile to be always in the alarm value.
Further, the logic instructions in the memory 303 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in essence or a part contributing to the prior art or a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing description of the application has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the application pertains, based on the idea of the application.
Claims (10)
1. The foundation pit side wall displacement control method is characterized in that a flexible horizontal displacement measuring device is arranged in a foundation pit side wall support pile, the horizontal displacement of the foundation pit side wall support pile in the depth range of the foundation pit is measured in real time, and if the horizontal displacement exceeds a preset displacement alarm value, the horizontal displacement of the support pile is controlled to be always within the displacement alarm value by increasing or unloading the support shaft force born by the support pile at the excessive displacement position.
2. The foundation pit side wall displacement control method according to claim 1, wherein a plurality of supporting shaft forces applied to the foundation pit side wall supporting piles are measured in real time, and if the supporting shaft forces exceed a preset shaft force alarm value, the supporting shaft forces applied to the supporting piles at the excessive stress positions are increased or unloaded, so that the supporting shaft forces of the supporting piles are controlled to be always within the shaft force alarm value.
3. The foundation pit side wall displacement control method according to claim 2, comprising:
the flexible horizontal displacement measuring device measures the horizontal displacement of the support pile in the depth range of the foundation pit in real time, and feeds back the horizontal displacement data to the operation control center;
the shaft force meters measure the supporting shaft force of the plurality of groups of transverse supports acting on the supporting piles in real time, and feed back supporting shaft force data to the operation control center;
the operation control center judges whether the horizontal displacement or the supporting shaft force measured in real time exceeds a preset displacement alarm value or not and judges whether the supporting shaft force exceeds a preset shaft force alarm value or not;
if the horizontal displacement and the supporting shaft force measured in real time do not exceed the alarm values of the horizontal displacement and the supporting shaft force, continuing to measure and monitor;
and if the horizontal displacement or the supporting shaft force measured in real time exceeds the alarm value of the horizontal displacement or the supporting shaft force, activating a counter-force pushing device at a corresponding position, wherein the counter-force pushing device is progressively increased or progressively unloaded under the drive of a numerical control pump station so as to change the supporting shaft force born by the supporting pile, thereby controlling the horizontal displacement and the supporting shaft force of the supporting pile on the side wall of the foundation pit to be always within the alarm value of the horizontal displacement and the supporting shaft force.
4. A foundation pit side wall displacement control method according to claim 3, wherein if the current supporting axial force Fx measured in real time exceeds the axial force alarm value Fv, the reaction pushing device at the corresponding position is activated, specifically comprising:
the counter-force pushing device at the excess stress position progressively increases or progressively unloads the load of the size of the Fx-Fv under the drive of the numerical control pump station, so that the supporting axial force of each part of the supporting pile is within the axial force alarm value.
5. A foundation pit side wall displacement control method according to claim 3, wherein if the current horizontal displacement Sx measured in real time exceeds the displacement alarm value Sv, the reaction pushing device at the corresponding position is activated, specifically comprising:
the flexible horizontal displacement measuring device measures the current situation horizontal displacement Sx of each supporting pile in real time;
the shaft force meters measure the current supporting shaft force Fx of the counter-force pushing device on the supporting pile in real time;
calculating the axial force Fv-fx|ofthe support pile required to be applied or unloaded by each counter-force pushing device after the current horizontal displacement Sx of the support pile reaches a displacement alarm value Sv through an analytic method or a numerical method;
generating a relation diagram of lateral displacement of the foundation pit and axial force of each support;
based on the relation diagram of the foundation pit lateral displacement and each supporting shaft force, the numerical control pump station automatically increases or unloads the load of the size of Fv-Fx in a progressive manner, and the operation control center judges whether the horizontal displacement still exceeds an alarm value in real time so as to adjust the supporting shaft force in real time.
6. The method of claim 5, wherein the computing control center is a cloud platform.
7. The control system of the foundation pit side wall displacement control method according to claim 1, comprising a support pile arranged on the foundation pit side wall, wherein the inner side of the foundation pit side wall support pile is horizontally connected with a plurality of counter-force thrusters, each counter-force thruster comprises a transverse support, a shaft force gauge and a hydraulic driving device, the shaft force gauge is arranged at the joint of the transverse support and the support pile, the transverse support is connected with the hydraulic driving device, and the hydraulic driving device is connected with a numerical control pump station;
the support pile is provided with a flexible horizontal displacement measuring device in the whole pile body;
the flexible horizontal displacement measuring device, the axial force meter and the numerical control pump station are connected with the operation control center.
8. The control system of claim 7, wherein the computing control center is a cloud platform.
9. Electronic equipment of foundation ditch lateral wall displacement control, its characterized in that includes:
at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the control method of any of claims 1-6.
10. A storage medium for foundation pit side wall displacement control, characterized in that the storage medium comprises a stored program which, when executed by a processor, implements a control method according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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