Dynamic monitoring system for underground water of foundation pit

Abstract

The utility model discloses a dynamic monitoring system for underground water of a foundation pit, which is characterized in that a drainage pipe and an ultrasonic water level gauge are arranged in a non-fine concrete well casing, the drainage pipe is connected with a water pump, and the water pump is connected with a telemetering terminal; wherein the telemetering terminal is in wireless connection with the monitoring platform, the telemetering terminal is connected with the ultrasonic water level gauge, the telemetering terminal can obtain and store water level data measured by the water level gauge in real time, and a worker can check the water level data in real time through the monitoring platform; the telemetering terminal sends out an early warning signal and starts a water pump to pump water, and water pumping is stopped until the water level drops below the early warning water level; real-time monitoring, early warning and emergency treatment of the underground water level of the foundation pit can be achieved, operation is convenient, and safety and stability are high; the non-contact ultrasonic water level gauge is adopted, the probability that components are damaged is smaller, the failure rate is lower, and the more stable and long-acting water level measurement requirement can be met.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit monitoring, in particular to a foundation pit groundwater dynamic monitoring system. Background Art

[0002] With the increase of urban building density, construction projects to be built are often located near dense existing buildings (structures). For commercial office buildings, due to their functional needs, most of them are built in areas with relatively complete municipal facilities and convenient transportation and communication. They are often composed of one or several high-rise buildings and surrounding podiums or pure basements. In complex high groundwater level areas, groundwater level monitoring is an increasingly important issue in deep foundation pit projects. The engineering hazards it induces have attracted widespread attention. In addition, in the face of new requirements for foundation pit control risks and suppression of settlement in high groundwater level areas, monitoring and studying the groundwater level of foundation pits in high groundwater level strata, accurately calculating, estimating and controlling the impact of groundwater on foundation pit retaining structures, and scientifically and economically rationally conducting precipitation have become the core problems in foundation pit projects. In order to ensure the safety of basement construction, accurate and sensitive foundation pit deformation monitoring devices must be selected for real-time monitoring during the foundation pit engineering stage, and the dynamic change laws of unstable change parameters in the foundation pit engineering must be mastered. Relevant measures should be taken in time to solve related problems and ensure the safety of the foundation pit stage.

[0003] In order to solve the above problems, some existing technologies provide contact water level gauges to monitor the water level of foundation pits, and use water pumps to dewater the foundation pits. Although this can solve the problems of foundation pit dewatering and monitoring, it requires staff to check the water level data regularly, which is not convenient and cannot monitor the water level in real time, and it is likely that the operation will not be timely. Contact water level gauges are also prone to failure. Once the water level gauge fails, the water level cannot be monitored normally, which can easily lead to danger. In addition, during the foundation pit monitoring process, it should also be considered that groundwater seepage carries fine particles in the soil layer into the well pipe, which will affect the measurement accuracy of the water level. Utility Model Content

[0004] The utility model aims to provide a foundation pit groundwater dynamic monitoring system to solve the technical problems of the inability to monitor the groundwater level in the foundation pit in real time, the easy failure of the water level meter, the groundwater seepage carrying fine particles of the soil layer into the well and affecting the water level measurement accuracy.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a foundation pit groundwater dynamic monitoring system, comprising a sandless concrete well pipe; the outer surface of the sandless concrete well pipe is covered with a cylindrical filter layer, and the outer side surface of the filter layer is provided with a cylindrical crushed stone layer; a sand settling pipe is provided at the bottom of the sandless concrete well pipe, and a clay layer is provided on the outer side surface of the top of the sandless concrete well pipe and the top surface of the crushed stone layer; a drainage pipe is provided inside the sandless concrete well pipe, the lower end of the drainage pipe is located at the bottom of the sandless concrete well pipe, and the upper end extends upward along the well pipe wall to the ground and is provided with a water pump, the water pump is connected to a telemetry terminal, and the telemetry terminal is provided on the ground; an ultrasonic water level meter is provided on the inner side surface of the top of the sandless concrete well pipe, and the ultrasonic water level meter is connected to the telemetry terminal.

[0007] Preferably, the telemetry terminal comprises a main control module, a communication module, a storage module and an early warning module, and the main control module is electrically connected to the communication module, the storage module and the early warning module respectively.

[0008] Preferably, it also includes a monitoring platform, which is wirelessly connected to the communication module.

[0009] Preferably, the ultrasonic water level meter is electrically connected to the early warning module.

[0010] Preferably, the water pump is electrically connected to the main control module.

[0011] Preferably, the top surface of the filter layer is flush with the top surface of the crushed stone layer, and the bottom surface of the filter layer is flush with the bottom surface of the sandless concrete well pipe.

[0012] Preferably, the bottom surface of the gravel chip layer is flush with the bottom surface of the sand settling tube.

[0013] Preferably, the above-ground portion of the drainage pipe is provided with a flow meter for recording the total amount of groundwater extracted.

[0014] The beneficial effects of the utility model are embodied in:

[0015] 1) The utility model provides a foundation pit groundwater dynamic monitoring system, in which a drainage pipe and an ultrasonic water level meter are arranged in a sandless concrete well pipe, the drainage pipe is connected to a water pump, and the water pump is connected to a telemetry terminal, wherein the telemetry terminal is wirelessly connected to a monitoring platform, and the telemetry terminal is wired to an ultrasonic water level meter, and the telemetry terminal can obtain and store water level data measured in real time by the water level meter, and the staff can view the water level data in real time through the monitoring platform, and when the water level exceeds the warning value, the telemetry terminal sends out a warning signal and starts the water pump to pump water, and stops pumping water until the water level drops below the warning water level; it can realize real-time monitoring, warning and emergency treatment of the foundation pit groundwater level, and is easy to operate and has strong safety and stability;

[0016] 2) The utility model provides a foundation pit groundwater dynamic monitoring system, which adopts a non-contact ultrasonic water level meter. Compared with the contact immersion water level meter, the ultrasonic water level meter ensures the measurement accuracy, and because it does not directly contact the groundwater in the foundation pit, the probability of component damage is smaller, the failure rate is lower, and it can meet the needs of more stable and long-term water level measurement;

[0017] 3) The utility model provides a foundation pit groundwater dynamic monitoring system, in which a filter layer is wrapped around the outer side of a sandless concrete well pipe, and a crushed stone layer is arranged on the outer side of the filter layer. A certain amount of large gaps are left between the stone chips of the crushed stone layer to prevent groundwater seepage from carrying away fine particles in the soil layer and affecting the measurement accuracy of the water level.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The main purpose and other advantages of the utility model can be realized and obtained by the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a top view cross-sectional view of a sandless concrete well pipe, a filter screen layer and a crushed stone chip layer of the utility model.

[0022] Figure 3 The utility model is a schematic diagram of the connection relationship between the telemetry terminal and the monitoring platform, the water pump and the ultrasonic water level meter.

[0023] Figure numerals: 1-sandless concrete well pipe, 2-filter layer, 3-gravel chip layer, 4-sand settling pipe, 5-clay layer, 6-drain pipe, 7-water pump, 8-telemetry terminal, 9-ultrasonic water level meter, 10-flow meter. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be interpreted as limiting the technical solution of the present invention.

[0025] Reference Figure 1 and Figure 2The present embodiment provides a foundation pit groundwater dynamic monitoring system, comprising a sandless concrete well pipe 1; the outer surface of the sandless concrete well pipe 1 is covered with a cylindrical filter layer 2, the outer side of the filter layer 2 is provided with a cylindrical crushed stone layer 3, the top surface of the filter layer 2 is flush with the top surface of the crushed stone layer 3, the bottom surface of the filter layer 2 is flush with the bottom surface of the sandless concrete well pipe 1, and the filter layer 2 completely wraps the side of the sandless concrete well pipe 1 to prevent groundwater seepage from carrying away fine particles in the soil layer; a sand settling pipe 4 is provided at the bottom end of the sandless concrete well pipe 1, and the outer side surface of the top of the sandless concrete well pipe 1, the crushed stone layer 3, the bottom surface of the filter layer 2, and the bottom surface of the filter layer 2 are flush with the bottom surface of the sandless concrete well pipe 1. A clay layer 5 is arranged on the top surface of the debris layer 3; the bottom surface of the crushed stone debris layer 3 is flush with the bottom surface of the sand settling pipe 4; a drainage pipe 6 is arranged inside the sandless concrete well pipe 1, the lower end of the drainage pipe 6 is located at the bottom of the sandless concrete well pipe 1, the upper end extends upward along the well pipe wall to the ground and is provided with a water pump 7, the water pump 7 is connected to a telemetry terminal 8, the telemetry terminal 8 is arranged on the ground, and a flow meter 10 is arranged on the above-ground part of the drainage pipe 6 for recording the total amount of groundwater extracted; an ultrasonic water level meter 9 is arranged on the inner side of the top of the sandless concrete well pipe 1, and the ultrasonic water level meter 9 is connected to the telemetry terminal 8.

[0026] Reference Figure 3 The telemetry terminal 8 includes a main control module, a communication module, a storage module and an early warning module; in addition, the present embodiment also includes a monitoring platform, through which technical personnel can monitor the foundation pit water level in real time and perform emergency processing; wherein the main control module is electrically connected to the communication module, the storage module and the early warning module respectively; the monitoring platform is wirelessly connected to the communication module to realize two-way communication between the monitoring platform and the telemetry terminal; the ultrasonic water level meter 9 is electrically connected to the early warning module, and the water pump 7 is electrically connected to the main control module.

[0027] Further, the working principle of the utility model is as follows: when groundwater seeps toward the sandless concrete well pipe 1 along the hydraulic gradient, it first passes through the rubble layer 3 and the filter layer 2 to prevent the groundwater seepage from carrying away fine particles in the soil layer into the sandless concrete well pipe 1 and affecting the groundwater level measurement; an ultrasonic water level meter 9 is placed in the sandless concrete well pipe 1 to perform real-time non-contact measurement of the groundwater level. The ultrasonic water level meter 9 can transmit the measurement data of the groundwater level to the telemetry terminal 8 in real time and store it in the storage module. The communication module can wirelessly transmit the groundwater level data in the storage module to facilitate remote viewing by technicians; when the water level data measured by the ultrasonic water level meter 9 exceeds the warning water level, the warning module alarms, the control module starts the water pump 7 to pump water, and the water pump 7 is turned off to stop pumping water after the water level drops below the warning water level; or the technician can use the monitoring platform to issue a switch command to the water pump 7 through the communication module and the main control module to perform pumping processing, reduce the groundwater level within a reasonable range in advance, and measure the water volume through the flow meter 10 during the pumping process.

[0028] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field thinks of within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A foundation pit groundwater dynamic monitoring system, characterized by: It comprises a sandless concrete well pipe (1); The outer surface of the sandless concrete well pipe (1) is covered with a cylindrical filter layer (2), and the outer side surface of the filter layer (2) is provided with a cylindrical crushed stone layer (3); a sand settling pipe (4) is provided at the bottom end of the sandless concrete well pipe (1), and a clay layer (5) is provided on the outer side surface of the top of the sandless concrete well pipe (1) and the top surface of the crushed stone layer (3); A drainage pipe (6) is arranged inside the sandless concrete well pipe (1), the lower end of the drainage pipe (6) is located at the bottom of the sandless concrete well pipe (1), the upper end of the drainage pipe (6) extends upward along the well pipe wall to the ground and is provided with a water pump (7), the water pump (7) is connected to a telemetry terminal (8), and the telemetry terminal (8) is arranged on the ground; An ultrasonic water level meter (9) is arranged on the inner side surface of the top of the sandless concrete well pipe (1), and the ultrasonic water level meter (9) is connected to the telemetry terminal (8).

2. A foundation pit groundwater dynamic monitoring system as claimed in claim 1, characterized in that: The telemetry terminal (8) comprises a main control module, a communication module, a storage module and an early warning module, and the main control module is electrically connected to the communication module, the storage module and the early warning module respectively.

3. A foundation pit groundwater dynamic monitoring system as claimed in claim 2, characterized in that: It also includes a monitoring platform, which is wirelessly connected to the communication module.

4. A foundation pit groundwater dynamic monitoring system as claimed in claim 2, characterized in that: The ultrasonic water level meter (9) is electrically connected to the early warning module.

5. A foundation pit groundwater dynamic monitoring system as claimed in claim 2, characterized in that: The water pump (7) is electrically connected to the main control module.

6. A foundation pit groundwater dynamic monitoring system as claimed in claim 1, characterized in that: The top surface of the filter layer (2) is flush with the top surface of the crushed stone layer (3), and the bottom surface of the filter layer (2) is flush with the bottom surface of the sandless concrete well pipe (1).

7. A foundation pit groundwater dynamic monitoring system as claimed in claim 1, characterized in that: The bottom surface of the gravel chip layer (3) is flush with the bottom surface of the sand settling tube (4).

8. A foundation pit groundwater dynamic monitoring system as claimed in claim 1, characterized in that: The above-ground portion of the drainage pipe (6) is provided with a flow meter (10) for recording the total amount of groundwater extracted.

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