A vacuum dewatering system suitable for deep foundation pits

Abstract

The utility model relates to deep foundation pit construction technology field, concretely relates to a kind of vacuum dewatering system suitable for deep foundation pit, including the dewatering well pipe installed in dewatering well, water level sensor installed in dewatering well pipe, respectively into the dewatering well pipe of pumping pipe and vacuum pipe, pumping pump connected with pumping pipe, vacuum pump connected with vacuum pipe, sealing cover covered in the mouth of dewatering well pipe, the intelligent acquisition instrument receiving water level sensor feedback signal, and the received data is uploaded to control room data processing end by intelligent acquisition instrument, and information after processing is uploaded to cloud platform storage and sent to control terminal by control room data processing end, and control terminal issues control instruction to field controller, and field controller controls the start-stop of pumping pump and vacuum pump respectively.The utility model utilizes vacuum order to maintain negative pressure environment inside dewatering well, and good conditions are created for starting pumping pump to pump water quickly by overcoming the weight of water in negative pressure environment, and the smoothness of deep groundwater pumping is realized.

Description

Technical Field

[0001] This utility model relates to the field of deep foundation pit construction technology, specifically to a vacuum dewatering system suitable for deep foundation pits. Background Technology

[0002] With the ongoing urbanization in my country, human life is increasingly demanding more underground space, leading to the growing application of deep foundation pit engineering in construction projects. Deep foundation pit engineering requires controlling the groundwater level during construction. Traditional dewatering methods typically involve setting up several dewatering wells within the pit to collect water, which is then pumped to the surface. This method requires daily manual monitoring of the water level and adjustment of the dewatering depth, a cumbersome, time-consuming, and labor-intensive process. Furthermore, manual water level measurements are heavily influenced by subjective factors, resulting in significant errors during adjustments. Additionally, water levels are constantly changing and affected by numerous external factors. Relying on manual methods cannot achieve timely dynamic adjustments to the dewatering rate, leading to pump idling, causing additional damage to machinery and wasting electrical energy.

[0003] In the process of groundwater extraction, a common problem is that when extracting groundwater from deep foundation pits, the negative pressure applied by the pump is counteracted by the weight of the water, making it difficult to extract the water. Therefore, existing dewatering systems that rely solely on pumps have certain technical defects when extracting groundwater from deep foundation pits. Utility Model Content

[0004] This utility model discloses a vacuum dewatering system suitable for deep foundation pits. It uses a vacuum method to maintain a negative pressure environment inside the dewatering well. The negative pressure environment overcomes the weight of the water, creating favorable conditions for starting the water pump for rapid water extraction, thereby pumping deep groundwater to the surface.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A vacuum dewatering system suitable for deep foundation pits includes a dewatering well pipe installed inside a dewatering well, a water level sensor installed inside the dewatering well pipe, a pumping pipe and a vacuum pipe extending into the dewatering well pipe respectively, a pumping pump connected to the pumping pipe, a vacuum pump connected to the vacuum pipe, a sealing cap covering the pipe opening of the dewatering well pipe, and an intelligent data acquisition device that receives feedback signals from the water level sensor. The intelligent data acquisition device uploads the received data to the data processing terminal in the control room. The data processing terminal in the control room uploads the processed information to the cloud platform for storage and sends it to the control terminal. The control terminal sends control commands to the field controller, and the field controller controls the start and stop of the pumping pump and the vacuum pump respectively.

[0007] Furthermore, the control terminal includes a computer control terminal and a mobile phone control terminal.

[0008] Furthermore, the water pump and the vacuum pump are not turned on simultaneously.

[0009] Furthermore, the sealing cover includes an upper flange and a lower flange. The lower flange is fitted onto and fixed to the dewatering well pipe. The upper flange has a pumping port, a vacuum port, and bolt holes respectively. The pumping pipe extends into the dewatering well pipe through the pumping port, and the vacuum pipe extends into the dewatering well pipe through the vacuum port. The upper flange and the lower flange are fixedly connected by bolts.

[0010] Furthermore, the sealing cover also includes a dust cover, which is used to cover the opening of the dewatering well pipe after the pumping pipe and vacuum pipe are taken out of the dewatering well pipe.

[0011] This invention uses an intelligent control system to automatically control the groundwater level in the dewatering well, saving manpower and resources and improving the accuracy of dewatering control, thus minimizing the risk of safety accidents caused by water level errors. More importantly, this invention fully considers the technical difficulties of groundwater dewatering and drainage in deep foundation pits. It uses a vacuum pump to maintain a negative pressure environment inside the dewatering well pipe, overcoming the weight of the water. When a pump needs to be started, the vacuum pump is turned off and the pump is started. Because the dewatering well pipe is under negative pressure before the pump is started, the pump can quickly pump deep groundwater to the surface, improving pumping efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the deep foundation pit vacuum dewatering system in the embodiment;

[0013] Figure 2 for Figure 1 A schematic diagram of the sealing cap at point A.

[0014] Figure label:

[0015] 1. Dewatering well; 2. Dewatering well pipe; 3. Pumping pipe; 4. Water level sensor; 5. Pumping pump; 6. Vacuum pump; 7. Vacuum pipe; 8. Lower flange; 9. Upper flange; 10. Bolt hole; 11. Vacuum pipe port; 12. Pumping pipe port; 13. Dust cover. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] This embodiment discloses a vacuum dewatering system suitable for deep foundation pits, which uses an intelligent control system to achieve intelligent monitoring and control of the groundwater level. For example... Figure 1As shown, the intelligent control system includes a monitoring module, a data acquisition module, a data processing module, a control module, a storage module, a pumping module, and a vacuuming module. In this embodiment, the monitoring module includes a water level sensor 4. A dewatering well pipe 2 is installed inside the dewatering well 1, and the water level sensor 4 is installed on the pipe wall of the dewatering well pipe 2. In this embodiment, the data acquisition module uses a commercially available intelligent data acquisition device. The water level sensor 4 monitors the groundwater level in the dewatering well pipe 2 in real time and converts the water level change into an electrical signal, which is then fed back to the intelligent data acquisition device. The data processing module includes a control room data processing terminal. The intelligent data acquisition device uploads the received data to the control room data processing terminal, which then uploads the data to the storage module (in this embodiment, a cloud platform) for storage. It also converts the electrical signal into water level information data, compares and analyzes it against preset water level control height data, and then sends the analysis results to the control terminal. In this embodiment, the control terminal is divided into a computer control terminal and a mobile phone control terminal, which can adjust and control the water level anytime, anywhere. The control terminal sends control commands to the field controller, which controls the pumping module and the vacuuming module respectively.

[0018] The pumping module in this embodiment includes a pumping pump 5 and a pumping pipe 3. The start and stop of the pumping pump 5 are controlled by a field controller. The pumping pump 5 is connected to the pumping pipe 3, which extends into the dewatering well pipe 2 and is below the water surface. The vacuuming module in this embodiment includes a vacuum pump 6 and a vacuum pipe 7. The start and stop of the vacuum pump 6 are controlled by a field controller. The vacuum pump 6 is connected to the vacuum pipe 7, which extends into the dewatering well pipe 2 and is located above the water surface.

[0019] To facilitate vacuuming inside the dewatering well pipe 2, a sealing cap is provided at the pipe opening of the dewatering well pipe 2 in this embodiment. The structure of the sealing cap is as follows: Figure 2 As shown, the sealing cover includes an upper flange 9 and a lower flange 8. A dewatering well inlet is located in the center of the lower flange 8, and bolt holes are located on its edge. The lower flange 8 is fitted onto the dewatering well pipe 2 and fixed by welding. A pumping pipe inlet 12 is located in the center of the upper flange 9, and a vacuum pipe inlet 11 is located beside the pumping pipe inlet 12. Bolt holes 10 are located on the edge of the upper flange 9. The upper flange 9 and lower flange 8 are fixed together with bolts. A pumping pipe 3 is inserted into the dewatering well pipe 2 along the pumping pipe inlet 12, and a vacuum pipe 7 is inserted into the dewatering well pipe 2 along the vacuum pipe inlet 11. When the deep foundation pit construction is completed, or when dewatering treatment of the dewatering well 1 is temporarily unnecessary, the pumping pipe 3 and vacuum pipe 7 are extracted from the dewatering well pipe 2. To prevent other debris from falling into the dewatering well pipe 2, a dust cover 13 is also provided in this embodiment. The dust cover 13 can cover the inlet of the dewatering well pipe 2, providing a protective shield.

[0020] In the above scheme, the vacuum pump 6 and the water pump 5 do not start simultaneously. When the water level sensor 4 detects that the water level in the dewatering well pipe 2 is within the set water level range, the water pump 5 remains off, while the vacuum pump 6 remains on during this stage, continuously pumping vacuum into the dewatering well pipe 2 to maintain a negative pressure environment. When the water level sensor 4 detects that the water level is higher than the set maximum water level, the field controller controls the vacuum pump 6 to stop running and controls the water pump 5 to start. The water pump 5 pumps the water in the dewatering well pipe 2 to the ground for discharge until the water level drops to the set range. Then, the water pump 5 stops running, and the vacuum pump 6 starts. In this way, the vacuum pump 6 and the water pump 5 operate alternately.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum dewatering system suitable for deep foundation pits, characterized in that: The system includes a dewatering well pipe installed inside the dewatering well, a water level sensor installed inside the dewatering well pipe, a pumping pipe and a vacuum pipe extending into the dewatering well pipe respectively, a pumping pump connected to the pumping pipe, a vacuum pump connected to the vacuum pipe, a sealing cap covering the pipe opening of the dewatering well pipe, and an intelligent data acquisition device that receives feedback signals from the water level sensor. The intelligent data acquisition device uploads the received data to the data processing terminal in the control room. The data processing terminal in the control room uploads the processed information to the cloud platform for storage and sends it to the control terminal. The control terminal sends control commands to the field controller, which controls the start and stop of the pumping pump and the vacuum pump respectively.

2. The vacuum dewatering system suitable for deep foundation pits according to claim 1, characterized in that: The control terminals include computer control terminals and mobile phone control terminals.

3. The vacuum dewatering system suitable for deep foundation pits according to claim 1, characterized in that: The water pump and vacuum pump are not turned on at the same time.

4. A vacuum dewatering system suitable for deep foundation pits according to claim 1, characterized in that: The sealing cover includes an upper flange and a lower flange. The lower flange is fitted onto and fixed to the dewatering well pipe. The upper flange has a pumping port, a vacuum port, and bolt holes respectively. The pumping pipe extends into the dewatering well pipe through the pumping port, and the vacuum pipe extends into the dewatering well pipe through the vacuum port. The upper flange and the lower flange are fixedly connected by bolts.

5. A vacuum dewatering system suitable for deep foundation pits according to claim 4, characterized in that: The sealing cover also includes a dust cover, which is used to cover the opening of the dewatering well pipe after the pumping pipe and vacuum pipe are taken out of the dewatering well pipe.

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