Foundation pit edge enclosure water supply system and method based on automatic control

Abstract

The invention relates to the technical field of foundation pits, in particular to a foundation pit edge maintenance water supply system and method based on automatic control. The method comprises the following steps: S1, collecting construction site rainwater through a sump; s2, rainwater in the water collecting pit is subjected to graded filtering treatment through rainwater treatment equipment; s3, the purified rainwater is pumped to a water collecting pit through a water pump to be stored; s4, monitoring system state parameters through a water level sensor and a flying dust sensor; and S5, the PLC controls start and stop of a water supply module based on the monitoring parameters. According to the scheme, rainwater can be efficiently and automatically collected to be used as water for maintenance and construction. The method is mainly applied to the foundation pit edge maintenance water supply aspect based on automatic control.

Description

Technical Field

[0001] This invention relates to the field of foundation pit technology, and more specifically, to a foundation pit edge maintenance water supply system and method based on automatic control. Background Technology

[0002] The current construction industry is transforming towards "refined management and intensive resource utilization," but there are still significant shortcomings in resource utilization and automated control on site.

[0003] Currently, edge protection for foundation pits and staircases is generally constructed using ordinary steel pipes, which have a single function, only providing safety protection, and their potential as potential water flow channels has not been effectively utilized. At the same time, water resource management at construction sites is inefficient: rainwater collected after rainfall is mostly discharged directly without being recycled; while during the structural construction phase, a large amount of tap water is needed for curing and dust suppression, resulting in resource waste and increased costs.

[0004] In addition, dust suppression operations in foundation pits mostly rely on manual operation of water trucks or manual sprinkler systems, which have a low degree of automation, require dedicated personnel to be on duty, and result in untimely response and high labor costs. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology, this invention provides an automated control-based water supply system and method for the maintenance of foundation pit edges. This solution can efficiently and automatically collect rainwater for maintenance and construction water use.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: An automatic control-based water supply system for foundation pit edge protection, used for water supply during foundation pit construction, including... A water collection pit, which is constructed of brick and has waterproof inner walls, is used to collect rainwater from the construction site. Rainwater treatment equipment is installed at the bottom of the foundation pit. The rainwater treatment equipment includes a sewage interception basket and a diversion filter device for classifying and filtering the collected rainwater. The rainwater treatment equipment is connected to the collection pit. A fire water tank, which is connected to the sump, is used for water supply operations; The control module includes a PLC controller, a water level sensor, and a dust sensor. The water level sensor is installed in the sump and the fire water tank and is used to automatically control the water supply operation based on sensor data. A water supply module, which connects the fire water tank and the control module, includes a water pump, a sprinkler system, and a protective steel pipe, wherein the protective steel pipe is a water flow channel formed by threaded connections.

[0007] The water level sensor includes a high-level water level sensor and a low-level water level sensor, which are respectively installed at a predetermined distance from the top and bottom.

[0008] The sump bed is made of 100mm thick C15 concrete, the walls are made of MU10 clay bricks and constructed with M10 cement mortar, and the inner wall is plastered with 1:2 waterproof mortar with 3% silica densifier added.

[0009] A method for water supply to the perimeter retaining wall of a foundation pit based on automatic control includes the following steps: Step S1: Collect rainwater from the construction site through a sump pit; Step S2: Use rainwater treatment equipment to perform graded filtration treatment on the rainwater in the collection pit; Step S3: Pump the purified rainwater to a collection pit for storage using a water pump; Step S4: Monitor system status parameters using water level and dust sensors; Step S5: The PLC controller controls the start and stop of the water supply module based on the monitored parameters.

[0010] The steps in step S1 include, S11. Rainwater is initially filtered by a sewage interception basket to intercept large particulate impurities. S12. Initial polluted rainwater is removed through a diversion filtration device; S13. The subsequent rainwater is finally purified through the filter screen in the diversion filtration device.

[0011] In step S4, water level data is monitored by high-level water level sensors and low-level water level sensors installed in the water collection pit (101) and fire water tank (103), respectively.

[0012] In step S5, when the control module detects a system fault, the control alarm unit issues an audible and visual alarm and performs an automatic power-off operation.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By installing a sump, rainwater treatment equipment, and a fire water tank, a complete closed-loop system for rainwater collection, treatment, storage, and reuse was constructed. This system effectively collects and purifies rainwater from the construction site, which would otherwise be discharged as waste, and directly uses it for concrete curing, dust suppression, and other construction processes. This significantly reduces reliance on municipal tap water, achieving intensive water resource utilization and meeting green construction requirements. An intelligent control core was built by integrating a PLC controller, water level sensor, and dust sensor. Based on real-time monitoring of water level and dust data, the system automatically decides and controls the start and stop of water pumps and sprinkler systems, achieving unmanned automated operation for dust suppression and water supply. Traditional perimeter protection steel pipes for the foundation pit were modified by threading connections to create sealed water flow channels, allowing the retaining structure to simultaneously serve as both a safety protection system and a water supply pipeline. After the foundation pit construction is completed, these steel pipe components can be disassembled and reassembled for reuse in areas such as stairs, achieving material recycling. Attached Figure Description

[0014] Figure 1 This is a flowchart of the rainwater harvesting process of the present invention; Figure 2 This is a flowchart of the water control process of the present invention; Figure 3 This is a flowchart of the system installation process for the present invention; Figure 4 This is a schematic diagram of the system of the present invention; In the diagram: 1 is the foundation pit, 2 is the sump pit, 3 is the rainwater treatment equipment, 4 is the fire water tank, 5 is the control module, 6 is the water supply module, 7 is the water pump, 8 is the sprinkler system, and 9 is the retaining steel pipe. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0017] like Figures 1 to 4 As shown, sump 2 is located at the bottom of foundation pit 1 and is constructed of brick. Specifically, its foundation layer is 100mm thick C15 concrete, and the walls are made of MU10 clay bricks, constructed with M10 cement mortar. The inner wall is plastered with 1:2 waterproof mortar, with 3% silica densifier added to enhance its impermeability, ensuring that it can effectively collect and temporarily store rainwater from the construction site without leakage.

[0018] Rainwater treatment equipment 3: Connected to the collection pit 2, it is installed at an appropriate location in the foundation pit 1. This equipment includes a series of intercepting baskets and a diversion filter device, forming a graded filtration system. When the initial rainwater flows through the intercepting baskets, large particles such as leaves and silt are intercepted first; then it enters the diversion filter device, where its internal mechanism automatically removes the more heavily polluted initial rainwater (such as the first 2-5 mm of rainfall), and the subsequent relatively clean rainwater is finally purified by the filter screen inside the device.

[0019] Fire water tank 4: Connected to the outlet of rainwater treatment equipment 3 through a pipeline system, it is used to store purified rainwater and serves as the core water storage unit of the system, providing a water source for subsequent water supply operations.

[0020] Control Module 5: Serving as the system's brain, this module employs a PLC controller as the main control unit. It integrates water level and dust sensors. Water level sensors (including high and low level sensors) are precisely installed inside the sump 2 and fire water tank 4, respectively, for real-time monitoring of water levels. Dust sensors are deployed at the construction site to monitor airborne dust concentration. All sensor data is transmitted to the PLC controller for processing and analysis.

[0021] Water supply module 6: Connected to fire water tank 4 and controlled by control module 5. This module includes: Water pump 7: As a power source, it is responsible for pumping and pressurizing water from fire water tank 4 and delivering it.

[0022] Spraying equipment 8: Distributed along the edge of the foundation pit, used for dust suppression spraying operations.

[0023] Enclosure steel pipe 9: As an innovative multi-functional component, it is not only a traditional safety guardrail for foundation pits, but also a closed water flow channel that is connected by threading process to deliver water to each sprinkler point.

[0024] Preferably, the high-level and low-level water level sensors are installed at preset positions 200mm from the top and 100mm from the bottom of the container, respectively. This installation method can accurately monitor the full and low water status, providing a reliable basis for the PLC controller to make judgments.

[0025] Preferably, rubber pads are installed at the joints of the retaining steel pipe 9, and steel pipe diagonal braces are installed every 15 meters to form a stress reduction device, which effectively alleviates the vibration and potential damage caused by pipeline stress release and "water hammer effect".

[0026] Corresponding to the above system, the present invention also provides a method for water supply to the perimeter of a foundation pit based on automatic control, comprising the following steps: S1: Rainwater collection. Rainwater from the construction site is collected through collection pit 2.

[0027] S2: Staged filtration treatment. The collected rainwater is treated using rainwater treatment equipment 3. This step further includes: S11: Primary filtration is performed through the intercepting basket to intercept large particulate impurities.

[0028] S12: Initial polluted rainwater is removed through a diversion filtration device.

[0029] S13: The subsequent rainwater is finally purified through the filter screen in the diversion filtration device to obtain purified water.

[0030] S3: Purified water storage. The purified rainwater is pumped from the rainwater treatment equipment 3 to the fire water tank 4 for storage and backup via water pump 7.

[0031] S4: Status monitoring. The system's water level and air dust concentration are monitored in real time using water level sensors installed in the sump 2 and fire water tank 4, as well as dust sensors on site.

[0032] S5: Automatic Control. Based on the parameters monitored in step S4, the PLC controller automatically controls the start and stop of the water supply module 6. For example, when the dust concentration exceeds the standard, the water pump 7 and the sprinkler system 8 are automatically started; when the water level in the sump is too low, pumping stops, and tap water supply can be switched as needed.

[0033] Preferably, in step S5, the control module 5 also integrates a fault diagnosis function. When a system fault is detected, it will immediately control the alarm unit to issue an audible and visual alarm, and automatically perform a power-off operation after a period of time to protect the system equipment.

[0034] Preferably, the method also includes an important reuse step: after the foundation pit construction is completed and backfilled, the edge protection steel pipe 9 is removed and transported to the staircase of the main structure for reassembly. This allows it to continue to play a dual role as both "staircase edge safety protection" and "floor construction water channel" in subsequent construction stages, achieving material recycling and significantly saving costs.

[0035] The above description only illustrates the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. A water supply system based on automatic control for a foundation pit edge support, which is used for water supply in construction of a foundation pit (1), characterized in that: Comprising a water collecting pit (2) made of brick structure and waterproof treated inner wall for collecting rainwater on construction site; a rainwater treatment device (3) arranged at the bottom of the foundation pit (1), the rainwater treatment device (3) comprising a sewage basket and a waste filtering device for grading filtering treatment of the collected rainwater, the rainwater treatment device (3) being connected with the water collecting pit (2); a fire water tank (4) connected with the water collecting pit for water supply operation; a control module (5) comprising a PLC controller, a water level sensor and a dust sensor, the water level sensor being arranged in the water collecting pit (2) and the fire water tank (4) for automatic control of water supply operation based on sensor data; a water supply module (6) connected with the fire water tank (4) and the control module (5), comprising a water pump (7), a spraying device (8) and a containment steel pipe (9), the containment steel pipe (8) being a water flow passage formed by a sleeve connection.

2. The water supply system based on automatic control for the foundation pit edge support according to claim 1, characterized in that: The water level sensor comprises a high water level sensor and a low water level sensor, which are respectively installed at a predetermined distance from the top and the bottom.

3. The automatic control-based water supply system for foundation pit edge support according to claim 1, characterized in that: The water collecting pit (2) has a 100-thick C15 concrete cushion layer, a MU10 clay brick wall, a M10 cement mortar masonry, an inner wall with 1:2 waterproof mortar, and an inner mixture of 3% siliceous densifier.

4. A method for water supply for a foundation pit edge support based on automatic control, characterized in that, The method comprises the following steps: Step S1: collecting rainwater on the construction site through the water collecting pit (2); Step S2: grading filtering treatment of the rainwater in the water collecting pit by using the rainwater treatment device (3); Step S3: pumping the purified rainwater to the water collecting pit (2) for storage by the water pump (7); Step S4: monitoring system state parameters by the water level sensor and dust sensor monitoring system; Step S5: the PLC controller controls the start and stop of the water supply module (6) based on the monitoring parameters.

5. The automatic control-based water supply method for a foundation pit edge support according to claim 3, characterized in that: The step S1 comprises, S11, primary filtering of rainwater by the sewage basket to intercept large particle impurities; S12, excluding the initial contaminated rainwater by the waste filtering device; S13, final purification of subsequent rainwater by the filter screen in the waste filtering device.

6. The automatic control-based water supply method for a foundation pit edge support according to claim 3, characterized in that: In step S4, the high water level sensor and the low water level sensor installed in the water collecting pit (101) and the fire water tank (103) are used to monitor water level data.

7. The automatic control-based water supply method for a foundation pit edge support according to claim 3, characterized in that: In step S5, when the control module (5) detects a system failure, the control alarm unit issues an audible and visual alarm and performs an automatic power-off operation.

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