Intelligent monitoring experiment system for deformation of green steel support foundation pit

Abstract

The utility model provides a green steel support foundation pit deformation intelligent monitoring experiment system. The experiment system comprises a foundation pit steel support assembly, a soil pressure simulation system, a sensor and an Internet of Things intelligent monitoring system. Through the foundation pit steel supporting assembly, the soil pressure simulation system and the internet-of-things intelligent monitoring system, intelligent monitoring of foundation pit deformation is achieved; the sensors are respectively arranged on the foundation pit steel support assembly and the soil pressure simulation system and are used for monitoring the surface strain of the steel support, the tension of the counter-force anchor cable group and the deformation of the foundation pit; the Internet of Things intelligent monitoring system is in communication connection with the sensor and the loading mechanism. The Internet of Things intelligent monitoring system receives data of the sensor and controls operation of the loading mechanism; the green steel support foundation pit deformation intelligent monitoring experiment system provided by the utility model can shorten the foundation pit deformation monitoring period and reduce the foundation pit engineering construction risk, and is relatively low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of green steel support foundation pit deformation intelligent monitoring experiment, and specifically relates to a green steel support foundation pit deformation intelligent monitoring experiment system. Background Art

[0002] Since the Ministry of Housing and Urban-Rural Development and other departments issued guiding opinions on promoting the coordinated development of intelligent construction and building industrialization in July 2020, the rapid development of information technology has continuously empowered traditional engineering construction; the intelligent and digital transformation of engineering construction has become one of the leading directions in the future, and the concept of green buildings has also had a far-reaching impact on the engineering construction industry. Foundation pit engineering, as an important part of it, has attracted much attention, and due to the current off-pit support methods, such as anchor support, exceeding the land use red line, frequent accidents, and banned in some areas; therefore, green support technology-foundation pit steel support has gradually been promoted and applied; but the current foundation pit steel support design mostly relies on the experience of designers, the design time is long, the limitations are large, and the cost is difficult to control. Intelligent design has become the main direction in the future.

[0003] At present, the contradiction between urban construction and the shortage of urban land resources is becoming increasingly prominent. In order to improve the utilization rate of land resources, engineering construction space continues to extend underground, especially in some super-large and megacities, where there are many adjacent underground buildings (structures), the environment is complex, and the risk is increased. This has also led to frequent foundation pit engineering accidents in recent years. How to monitor, accurately predict and intelligently control foundation pit deformation in real time is of great engineering significance.

[0004] In the face of the above background and problems, the demand for compound talents with knowledge of Internet of Things, BIM, artificial intelligence and traditional civil engineering has become more urgent. To this end, the utility model is intended to provide an experimental system that can be used to realize the teaching and scientific research of students majoring in intelligent construction. On the one hand, it solves the problem of intelligent control technology of foundation pit deformation, and on the other hand, it can be used for teaching related to Internet of Things and intelligent construction to improve the teaching quality.

[0005] Based on the technical problems existing in the above-mentioned prior art, there is no relevant solution yet; therefore, it is urgent to find an effective solution to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this utility model is to address the problems existing in the above-mentioned technologies. The demand for compound talents who have knowledge of the Internet of Things, BIM, artificial intelligence and traditional civil engineering has become more urgent. To this end, the utility model proposes a green steel support foundation pit deformation intelligent monitoring experimental system, which on the one hand solves the technical problems of intelligent control of foundation pit deformation, and on the other hand, can be used for teaching related to the Internet of Things and intelligent construction to improve the teaching quality.

[0007] The utility model provides a green steel support foundation pit deformation intelligent monitoring experimental system, the experimental system comprises a foundation pit steel support component, an earth pressure simulation system, a sensor and an Internet of Things intelligent monitoring system; the foundation pit steel support component comprises a steel support and a first loading mechanism, the first loading mechanism and the steel support are connected by a bolt connection plate; the steel support comprises a first steel support and a second steel support, one end of the first steel support is horizontally connected to one end of the first loading mechanism, one end of the second steel support is horizontally connected to the other end of the first loading mechanism, and the first steel support and the second steel support are respectively located in the telescopic direction of the first loading mechanism; the earth pressure simulation system is used to simulate the application of earth pressure and foundation pit deformation, the earth pressure simulation system comprises an earth pressure simulation component and a reaction force anchor cable group; the earth pressure simulation component comprises a first earth pressure simulation component and a second soil pressure simulation component; the first soil pressure simulation component is horizontally arranged at the other end of the first steel support, and the second soil pressure simulation component is horizontally arranged at the other end of the second steel support; one end of the reaction anchor cable group is connected to the first soil pressure simulation component, and the other end of the reaction anchor cable group is connected to the second soil pressure simulation component, and the foundation pit steel support component is clamped horizontally between the first soil pressure simulation component and the second soil pressure simulation component; sensors are respectively arranged on the steel support and the soil pressure simulation system, and are used to monitor the surface strain of the steel support, the tension of the reaction anchor cable group and the deformation of the foundation pit; the Internet of Things intelligent monitoring system is respectively communicated with the sensor and the first loading mechanism; the Internet of Things intelligent monitoring system receives data from the sensor and controls the operation of the first loading mechanism.

[0008] Furthermore, the soil pressure simulation component includes a second loading mechanism, an elastic interlayer, a connecting support and a force transmission mechanism; one end of the second loading mechanism applying force is connected to the steel support through the elastic interlayer, and the elastic interlayer is located between the second loading mechanism and the steel support; the other end of the second loading mechanism applying force is connected to the connecting support through the force transmission mechanism; the reaction anchor group includes two groups of reaction anchors, each group of reaction anchors includes multiple reaction anchors; the two groups of reaction anchors are respectively located on both sides of the foundation pit steel support component and the soil pressure simulation system, so that the foundation pit steel support component and the soil pressure simulation system can be clamped along both sides; one end of the reaction anchor is connected to the connecting support on one side of the first soil pressure simulation component, and the other end of the reaction anchor is connected to the connecting support on one side of the second soil pressure simulation component; the Internet of Things intelligent monitoring system is also connected to the second loading mechanism in communication; the Internet of Things intelligent monitoring system receives data from the sensor and controls the operation of the second loading mechanism.

[0009] Furthermore, the force transmission mechanism includes a bolt connection plate and a force transmission member, and the second loading mechanism is connected to the force transmission member and the elastic interlayer respectively through the bolt connection plate; the force transmission member is directly connected to the connecting support and can evenly transfer the load on the second loading mechanism to the connecting support.

[0010] Furthermore, the sensor includes a displacement meter, a surface strain gauge and an anchor cable meter; the displacement meter is arranged on the elastic interlayer and is used to monitor the deformation of the foundation pit; the surface strain gauge is arranged on the steel support and is used to monitor the axial force of the steel support; the anchor cable meter is arranged on the reaction anchor cable and is used to monitor the tension of the anchor cable.

[0011] Furthermore, a connecting pad is provided on the outer side surface of the connecting support; one end of the reaction anchor cable passes through the bolt holes of the connecting support and the connecting pad, and is fixed to the connecting pad by a nut, thereby being fixed to the connecting support.

[0012] Furthermore, the first loading mechanism and the second loading mechanism are servo loading jacks respectively; the second loading mechanism is used to apply pressure to extrude the elastic interlayer, and the deformation of the elastic interlayer is used to simulate the deformation of the foundation pit; when the simulated foundation pit deformation exceeds a preset value and the axial force of the steel support does not exceed the preset value, the first loading mechanism applies a load to achieve the control of the simulated foundation pit deformation.

[0013] Furthermore, the IoT intelligent monitoring system includes a base station and an IoT monitoring platform; the sensor is communicatively connected to the base station, and the base station is communicatively connected to the IoT monitoring platform; the base station is used to report sensor monitoring data to the IoT monitoring platform, and issue control instructions to the IoT monitoring platform.

[0014] Furthermore, the IoT intelligent monitoring system receives data from the displacement meter and / or surface strain gauge, and controls the second loading mechanism to apply load to squeeze the elastic interlayer; the IoT monitoring platform receives data from the displacement meter, controls the first loading mechanism to apply load, so as to control the deformation of the simulated foundation pit; the base station and the sensor and the IoT monitoring platform are connected through wireless communication.

[0015] Accordingly, in combination with the above scheme, the present application scheme also provides a green steel support foundation pit deformation intelligent monitoring experiment operation method, which is used to implement the operation of the above-mentioned green steel support foundation pit deformation intelligent monitoring experiment system; the operation method comprises the following steps:

[0016] S1: Use Revit software to build a virtual model of the foundation pit deformation intelligent monitoring experimental system and introduce the Internet of Things intelligent monitoring system;

[0017] S2: Install foundation pit steel support components and soil pressure simulation system;

[0018] S3: Install sensors on the steel support and soil pressure simulation system respectively, and connect the sensors to the IoT intelligent monitoring system to achieve virtual model monitoring data docking and visualization;

[0019] S4: The IoT intelligent monitoring system controls the second loading mechanism of the foundation pit steel support assembly to apply load to squeeze the elastic interlayer deformation of the soil pressure simulation system, thereby simulating the deformation of the foundation pit;

[0020] S5: When the simulated foundation pit deformation exceeds the preset value and the axial force of the steel support does not exceed the preset value, the IoT intelligent monitoring system analyzes the monitoring data to automatically adjust the axial force of the steel support, and the first loading mechanism applies the load to achieve active control of the simulated foundation pit deformation.

[0021] Furthermore, the operation method can be used for the teaching of the course "Internet of Things and Intelligent Construction"; the Internet of Things intelligent monitoring system includes an Internet of Things monitoring platform. The Internet of Things monitoring platform is based on the concept of digital twins and corresponds one-to-one with the real experimental system to realize remote intelligent control of foundation pit deformation.

[0022] Compared with the prior art, the solution proposed by the utility model has the following beneficial effects:

[0023] (1) The green steel support foundation pit deformation intelligent monitoring experimental system provided by the utility model includes three parts: foundation pit steel support components, soil pressure simulation system and Internet of Things intelligent monitoring system, which realizes intelligent monitoring of foundation pit deformation;

[0024] (2) The soil pressure simulation system provided by the utility model realizes the simulation of foundation pit deformation through the elastic interlayer and reaction anchor cable;

[0025] (3) The reaction anchor cable provided by the utility model can improve the self-stability of the green steel support foundation pit deformation intelligent control experimental system;

[0026] (4) The green steel support foundation pit deformation intelligent monitoring experimental system and operation method provided by the utility model involve BIM technology, Internet of Things technology and active control technology of foundation pit deformation, and can be used for teaching and scientific research work of courses related to Internet of Things and intelligent construction to improve the quality of scientific research and teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The utility model will be further described below in conjunction with the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of a green steel support foundation pit deformation intelligent monitoring experimental system of the utility model.

[0030] In the figure: 1-steel support; 2-first loading mechanism; 3-second loading mechanism; 4-elastic interlayer; 5-bolt connection plate; 6-reaction anchor cable; 7-force transmission member; 8-connecting support; 9-connecting pad; 10-displacement meter; 11-surface strain gauge; 12-anchor cable meter; 13-base station; 14-Internet of Things monitoring platform, 15-wireless networking, 16-wireless transmission technology. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] As shown in Figure 1, the utility model provides a green steel support foundation pit deformation intelligent monitoring experimental system, which integrates the concepts of smart building and green building into the experimental system, and can be used for the teaching and scientific research of the Internet of Things and intelligent construction courses of foundation pit active deformation control technology; wherein, the experimental system includes a foundation pit steel support assembly, an earth pressure simulation system, a sensor and an Internet of Things intelligent monitoring system; further, the foundation pit steel support assembly includes a steel support 1 and a first loading mechanism 2, and the first loading mechanism 2 and the steel support 1 are connected by a bolt connection plate; further, the steel support 1 includes a first steel support and a second steel support, specifically, one end of the first steel support is along One end of the first loading mechanism 2 is horizontally connected, one end of the second steel support is horizontally connected to the other end of the first loading mechanism 2, and the first steel support and the second steel support are respectively located in the telescopic direction of the first loading mechanism 2, so that the first loading mechanism 2 can apply pressure to the steel supports 1 at both ends; specifically, one end of the first steel support is connected to one end of the first loading mechanism 2 through a first bolt connection plate, and one end of the second steel support is connected to the other end of the first loading mechanism 2 through a second bolt connection plate; further, the earth pressure simulation system is used to simulate the application of earth pressure and foundation pit deformation. Specifically, the earth pressure simulation system includes an earth pressure simulation group Parts and reaction anchor cable groups; further, the soil pressure simulation component includes a first soil pressure simulation component and a second soil pressure simulation component; further, the first soil pressure simulation component is horizontally arranged at the other end of the first steel support, and the second soil pressure simulation component is horizontally arranged at the other end of the second steel support, and the first soil pressure simulation component, the second soil pressure simulation component and the steel support 1 are located on the same horizontal line, so that the pressure application experiment can be realized; further, one end of the reaction anchor cable group is connected to the first soil pressure simulation component, and the other end of the reaction anchor cable group is connected to the second soil pressure simulation component, and the foundation pit steel support component is clamped horizontally on the first soil A foundation pit deformation simulation experiment is realized between the pressure simulation component and the second soil pressure simulation component; further, sensors are respectively arranged on the steel support 1 and the soil pressure simulation system, for monitoring the surface strain of the steel support 1, the tension of the reaction anchor group and the deformation of the foundation pit; further, the Internet of Things intelligent monitoring system is respectively communicated with the sensor and the first loading mechanism 2; specifically, the Internet of Things intelligent monitoring system receives data from the sensor and controls the operation of the first loading mechanism 2; the green steel support foundation pit deformation intelligent monitoring experimental system provided by the utility model can shorten the foundation pit deformation monitoring period, reduce the risk of foundation pit construction, and has relatively low cost.

[0037] Preferably, in combination with the above scheme, as shown in Figure 1, the soil pressure simulation component includes a second loading mechanism 3, an elastic interlayer 4, a connecting support 8 and a force transmission mechanism; wherein, one end of the second loading mechanism 3 applying force is connected to the steel support 1 through the elastic interlayer 4, and the elastic interlayer 4 is located between the second loading mechanism 3 and the steel support 1; further, the other end of the second loading mechanism 3 applying force is connected to the connecting support 8 through the force transmission mechanism; further, the reaction anchor cable group includes two groups of reaction anchor cables 6, each group of reaction anchor cables 6 includes a plurality of reaction anchor cables 6; the two groups of reaction anchor cables 6 are respectively located on both sides of the foundation pit steel support assembly and the soil pressure simulation system, so that the foundation pit steel support assembly and the soil pressure simulation system can be clamped along both sides; further, one end of the reaction anchor cable 6 is connected to the connecting support 8 on one side of the first soil pressure simulation assembly, and the other end of the reaction anchor cable 6 is connected to the connecting support 8 on one side of the second soil pressure simulation assembly; further, the Internet of Things intelligent monitoring system is also connected to the second loading mechanism 3 in communication; the Internet of Things intelligent monitoring system receives data from the sensor and controls the operation of the second loading mechanism 3.

[0038] Preferably, in combination with the above scheme, as shown in Figure 1, the force transmission mechanism includes a bolt connecting plate 5 and a force transmission member 7, and the second loading mechanism 3 is respectively connected to the force transmission member 7 and the elastic interlayer 4 through the bolt connecting plate 5; the force transmission member 7 is directly connected to the connecting support 8, and can evenly transfer the load on the second loading mechanism 3 to the connecting support 8; further, the steel support 1 is respectively bolted to the first loading mechanism 2 and the elastic interlayer 4 through the bolt connecting plate 5.

[0039] Preferably, in combination with the above scheme, as shown in Figure 1, the sensor includes a displacement meter 10, a surface strain gauge 11 and an anchor cable meter 12; specifically, the displacement meter 10 is arranged on the elastic interlayer 4 and is used to monitor the deformation of the foundation pit; further, the surface strain gauge 11 is arranged on the steel support 1 to monitor the axial force of the steel support; further, the anchor cable meter 12 is arranged on the reaction anchor cable 6 to monitor the tension of the anchor cable.

[0040] Preferably, in combination with the above scheme, as shown in Figure 1, a connecting plate 9 is provided on the outer surface of the connecting support 8; one end of the reaction anchor cable 6 passes through the bolt holes of the connecting support 8 and the connecting plate 9, and is fixed to the connecting plate 9 by a nut, thereby being fixed to the connecting support 8.

[0041] Preferably, in combination with the above scheme, as shown in Figure 1, the first loading mechanism 2 and the second loading mechanism 3 are servo loading jacks respectively; specifically, the second loading mechanism 3 is used to apply pressure to squeeze the elastic interlayer 4, so that the deformation of the elastic interlayer 4 is used to simulate the deformation of the foundation pit; further, when the second loading mechanism 3 simulates the deformation of the foundation pit exceeding a preset value (i.e., the limit value) and the axial force of the steel support 1 does not exceed the preset value (i.e., the limit value), the first loading mechanism 2 applies a load to achieve the control of the simulated foundation pit deformation.

[0042] Preferably, in combination with the above scheme, as shown in Figure 1, the Internet of Things intelligent monitoring system includes a base station 13 and an Internet of Things monitoring platform 14; further, the sensor is communicatively connected to the base station 13, and the base station 13 is communicatively connected to the Internet of Things monitoring platform 14; the base station 13 is used to report the data monitored by the sensor to the Internet of Things monitoring platform 14, and to issue control instructions to the Internet of Things monitoring platform 14; further, the base station 13 uses wireless networking 15 to report the data sensed by the sensor, and to issue control instructions to the Internet of Things monitoring platform 14; the base station 13 and the Internet of Things monitoring platform 14 use a wireless transmission mode 16 for communication.

[0043] Preferably, in combination with the above scheme, as shown in Figure 1, the IoT intelligent monitoring system receives data from the displacement meter 10 and / or the surface strain gauge 11, and controls the second loading mechanism 3 to apply a load to squeeze the elastic interlayer 4; further, the IoT monitoring platform 14 receives data from the displacement meter 10, controls the first loading mechanism 2 to apply a load, so as to control the deformation of the simulated foundation pit; further, the base station 13 and the sensor and the IoT monitoring platform 14 are connected through wireless communication.

[0044] Preferably, in combination with the above scheme, as shown in FIG1 , the green steel support foundation pit deformation intelligent monitoring experimental system provided by the utility model:

[0045] The second loading mechanism 3 can be controlled by the servo loading system to apply pressure to squeeze the elastic interlayer 4. The deformation of the elastic interlayer can be monitored by the displacement meter 10 to simulate the deformation of the foundation pit.

[0046] At the same time, the pressure applied by the first loading mechanism 2 is transmitted to the steel support 1, and the axial force of the steel support 1 changes. The surface strain gauge 11 can monitor the axial force of the steel support 1;

[0047] The monitoring data is displayed in real time through the Internet of Things monitoring platform 14; when the deformation of the foundation pit exceeds the limit value, and the axial force of the steel support 1 does not exceed the preset value, the first loading mechanism 2 can be intelligently controlled to apply the load to achieve the purpose of controlling the deformation of the foundation pit;

[0048] During the whole process, the reaction anchor cable 6 provides reaction support to maintain the stability of the experimental system. The force of the reaction anchor cable is fed back to the platform in real time through the anchor cable meter to monitor the stability of the system.

[0049] Accordingly, in combination with the above scheme, as shown in FIG1 , the present application scheme also provides a green steel support foundation pit deformation intelligent monitoring experiment operation method, which is used to implement the operation of the green steel support foundation pit deformation intelligent monitoring experiment system described above; specifically, the operation method includes the following steps:

[0050] S1: Use Revit software to build a virtual model of the foundation pit deformation intelligent monitoring experimental system;

[0051] S2: Install foundation pit steel support components and soil pressure simulation system, and introduce IoT intelligent monitoring system;

[0052] S3: Install sensors on the steel support 1 and the soil pressure simulation system respectively, and connect the sensors to the IoT intelligent monitoring system to achieve virtual model monitoring data docking and visualization;

[0053] S4: The IoT intelligent monitoring system controls the second loading mechanism 3 of the foundation pit steel support assembly to apply axial force to squeeze the elastic interlayer 4 of the soil pressure simulation system to deform, thereby simulating the deformation of the foundation pit;

[0054] S5: When the simulated foundation pit deformation exceeds the preset value and the axial force of the steel support 1 does not exceed the preset value, the IoT intelligent monitoring system analyzes the monitoring data to automatically adjust the axial force of the steel support 1, and the first loading mechanism 2 applies the load to achieve active control of the simulated foundation pit deformation.

[0055] Preferably, in combination with the above scheme, as shown in Figure 1, the utility model also provides a green steel support foundation pit deformation intelligent monitoring experimental operation method involving revit-based BIM modeling, Internet of Things technology and artificial intelligence technology, which can be used for the teaching and research of the "Internet of Things and Intelligent Construction" course; further, the Internet of Things intelligent monitoring system includes an Internet of Things monitoring platform 14, which is based on the concept of digital twins and corresponds one-to-one with the real experimental system, so as to control the real with the virtual, realize remote intelligent control of foundation pit deformation, and realize visualization of revit model monitoring data; further, the revit model corresponds one-to-one with the green steel support foundation pit deformation intelligent monitoring experimental system; specifically, in the present application scheme, the revit drawing test system in the BIM technology is used to realize the one-to-one correspondence between the real experimental system and the virtual one.

[0056] The green steel support foundation pit deformation intelligent monitoring experimental system and operation method provided by the utility model combine the Internet of Things, BIM, artificial intelligence and traditional civil engineering knowledge, and can be used to realize the experimental system of teaching and scientific research of students majoring in intelligent construction. On the one hand, it can solve the technical problems of intelligent control of foundation pit deformation; on the other hand, it can be used for teaching related to the Internet of Things and intelligent construction to improve the teaching quality.

[0057] The green steel support foundation pit deformation intelligent monitoring experimental system provided by the utility model integrates the concepts of smart building and green building into the experimental system, and can be used for the teaching of Internet of Things and intelligent construction courses and the scientific research of foundation pit active deformation control technology.

[0058] Compared with the prior art, the solution proposed by the utility model has the following beneficial effects:

[0059] (1) The green steel support foundation pit deformation intelligent monitoring experimental system provided by the utility model includes three parts: foundation pit steel support components, soil pressure simulation system and Internet of Things intelligent monitoring system, which realizes intelligent monitoring of foundation pit deformation;

[0060] (2) The soil pressure simulation system provided by the utility model realizes the simulation of foundation pit deformation through the elastic interlayer and reaction anchor cable;

[0061] (3) The reaction anchor cable provided by the utility model can improve the self-stability of the green steel support foundation pit deformation intelligent control experimental system;

[0062] (4) The green steel support foundation pit deformation intelligent monitoring experimental system provided by the utility model involves BIM technology, Internet of Things technology and active control technology of foundation pit deformation, and can be used for teaching and scientific research work of courses related to the Internet of Things and intelligent construction to improve the quality of scientific research and teaching.

[0063] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above-mentioned technical content without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope of the technical solution of the utility model.

Claims

1. A green steel support foundation pit deformation intelligent monitoring experimental system, characterized in that: The experimental system includes foundation pit steel support components, soil pressure simulation system, sensors and Internet of Things intelligent monitoring system; The foundation pit steel support assembly comprises a steel support (1) and a first loading mechanism (2), wherein the first loading mechanism (2) and the steel support (1) are connected via a bolt connection plate; the steel support (1) comprises a first steel support and a second steel support, wherein one end of the first steel support is horizontally connected to one end of the first loading mechanism (2), and one end of the second steel support is horizontally connected to the other end of the first loading mechanism (2), and the first steel support and the second steel support are respectively located in the telescopic direction of the first loading mechanism (2); The soil pressure simulation system is used to simulate the application of soil pressure and the deformation of the foundation pit. The soil pressure simulation system includes a soil pressure simulation component and a reaction anchor group; the soil pressure simulation component includes a first soil pressure simulation component and a second soil pressure simulation component; the first soil pressure simulation component is horizontally arranged at the other end of the first steel support, and the second soil pressure simulation component is horizontally arranged at the other end of the second steel support; one end of the reaction anchor group is connected to the first soil pressure simulation component, and the other end of the reaction anchor group is connected to the second soil pressure simulation component, and the foundation pit steel support component is clamped between the first soil pressure simulation component and the second soil pressure simulation component in the horizontal direction; The sensors are respectively arranged on the steel support (1) and the soil pressure simulation system, and are used to monitor the surface strain of the steel support (1), the tension of the reaction anchor cable group, and the deformation of the foundation pit; The Internet of Things intelligent monitoring system is respectively connected to the sensor and the first loading mechanism (2) for communication; the Internet of Things intelligent monitoring system receives data from the sensor and controls the operation of the first loading mechanism (2).

2. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 1 is characterized in that: The soil pressure simulation component comprises a second loading mechanism (3), an elastic interlayer (4), a connecting support (8) and a force transmission mechanism; one end of the second loading mechanism (3) for applying force is connected to the steel support (1) via the elastic interlayer (4), and the elastic interlayer (4) is located between the second loading mechanism (3) and the steel support (1); the other end of the second loading mechanism (3) for applying force is connected to the connecting support (8) via the force transmission mechanism; the reaction force anchor cable group comprises two groups of reaction force anchor cables (6), each group of the reaction force anchor cables (6) comprises a plurality of reaction force anchor cables (6); the two groups of reaction force anchor cables (6) are respectively The reaction anchor cable (6) is respectively located on both sides of the foundation pit steel support assembly and the soil pressure simulation system, so that the foundation pit steel support assembly and the soil pressure simulation system can be clamped along both sides; one end of the reaction anchor cable (6) is connected to the connection support (8) on one side of the first soil pressure simulation assembly, and the other end of the reaction anchor cable (6) is connected to the connection support (8) on one side of the second soil pressure simulation assembly; the Internet of Things intelligent monitoring system is also connected to the second loading mechanism (3) in communication; the Internet of Things intelligent monitoring system receives data from the sensor and controls the operation of the second loading mechanism (3).

3. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 2 is characterized in that: The force transmission mechanism comprises a bolt connection plate (5) and a force transmission member (7); the second loading mechanism (3) is connected to the force transmission member (7) and the elastic interlayer (4) respectively via the bolt connection plate (5); the force transmission member (7) is directly connected to the connection support (8) and is capable of uniformly transmitting the load on the second loading mechanism (3) to the connection support (8).

4. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 2 is characterized in that: The sensor comprises a displacement meter (10), a surface strain meter (11) and an anchor cable meter (12); the displacement meter (10) is arranged on the elastic interlayer (4) and is used to monitor the deformation of the foundation pit; the surface strain meter (11) is arranged on the steel support (1) and is used to monitor the axial force of the steel support; the anchor cable meter (12) is arranged on the reaction anchor cable (6) and is used to monitor the tension of the anchor cable.

5. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 2 is characterized in that: A connecting pad (9) is provided on the outer side surface of the connecting support (8); one end of the reaction force anchor cable (6) passes through the bolt holes of the connecting support (8) and the connecting pad (9), and is fixed to the connecting pad (9) by a nut, thereby being fixed to the connecting support (8).

6. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 4 is characterized in that: The first loading mechanism (2) and the second loading mechanism (3) are respectively servo loading jacks; the second loading mechanism (3) is used to apply pressure to squeeze the elastic interlayer (4), and the deformation of the elastic interlayer (4) is used to simulate the deformation of the foundation pit; when the deformation of the simulated foundation pit exceeds a preset value and the axial force of the steel support (1) does not exceed the preset value, the first loading mechanism (2) applies a load to control the deformation of the simulated foundation pit.

7. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 6 is characterized in that: The Internet of Things intelligent monitoring system comprises a base station (13) and an Internet of Things monitoring platform (14); the sensor is communicatively connected to the base station (13), and the base station (13) is communicatively connected to the Internet of Things monitoring platform (14); the base station (13) is used to report data monitored by the sensor to the Internet of Things monitoring platform (14), and to issue control instructions to the Internet of Things monitoring platform (14).

8. The green steel support foundation pit deformation intelligent monitoring experimental system according to claim 7 is characterized in that: The IoT intelligent monitoring system receives data from the displacement meter (10) and / or the surface strain meter (11) and controls the second loading mechanism (3) to apply a load to compress the elastic interlayer (4); the IoT monitoring platform (14) receives data from the displacement meter (10) and controls the first loading mechanism (2) to apply a load to control the deformation of the simulated foundation pit; the base station (13) is connected to the sensor and the IoT monitoring platform (14) via wireless communication.

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