CN206768791U - Groundwater monitoring, alarm and automatic recharge system on the outside of deep basal pit - Google Patents

Abstract

The utility model belongs to the technical field of groundwater recharge construction on the outside of deep foundation pits, and specifically relates to a groundwater monitoring, alarm and automatic recharge system on the outside of deep foundation pits, which solves the problem of poor groundwater recharge effect on the outside of deep foundation pits and cannot guarantee the quality of recharge The problem, which includes some precipitation wells, water level observation wells, some recharge wells, recharge water tanks and control parts, the dewatering wells are connected with the three-stage sedimentation tank, and the recharge water tanks have water inlets and water outlets, and the water inlets and The submersible pump II in the three-stage sedimentation tank is connected, and the water outlet is connected to each recharge well, and a pipeline pump is installed at the water outlet. The utility model adopts the automatic replenishment of the recharge water tank, the automatic monitoring and alarm of the water level, and the automatic startup and shutdown of the recharge. It realizes the intelligentization and full automation of the whole system from refilling water, water level monitoring, and refilling, ensuring the timeliness and quality of refilling; it does not require personnel participation, greatly reduces manpower input, and saves a lot of labor costs.

Description

Groundwater monitoring, alarm and automatic refilling system outside deep foundation pit

technical field

The utility model belongs to the technical field of groundwater recharge construction outside a deep foundation pit, in particular to a groundwater monitoring, alarm and automatic recharge system outside a deep foundation pit.

Background technique

There are more and more deep foundation pit projects in construction engineering, especially in areas with high groundwater levels, it is necessary to dewater the groundwater inside the foundation pit to facilitate construction. In order to reduce the influence of precipitation inside the foundation pit on the settlement and deformation of buildings and structures around the outside of the foundation pit, it is necessary to supplement and recharge the groundwater outside the foundation pit. At present, the construction method of groundwater recharge outside the foundation pit is mainly to manually observe the groundwater level, and manually recharge according to the decline of the water level, which requires a lot of manpower and material resources, and the change of the water level is not timely and accurate; Recharging cannot be carried out in time during recharging, and the amount of recharging water cannot be accurately controlled, which is prone to phenomena such as untimely recharging and excessive recharging, and the quality of recharging is not high; most of the water for recharging is urban tap water, and the water consumption is large. Cannot meet the requirement of saving water.

Contents of the invention

In order to solve the problems of poor groundwater recharge effect and unguaranteed recharge quality outside deep foundation pits, the utility model provides a monitoring, alarm and automatic recharge system for groundwater outside deep foundation pits.

The utility model adopts following technical scheme to realize:

A groundwater monitoring, alarm and automatic recharge system outside a deep foundation pit, including several dewatering wells, water level observation wells, several recharge wells, recharge water tanks and a control part,

Each of the dewatering wells is set inside the foundation pit, and a submersible pump I for extracting groundwater is arranged in the dewatering well, and the submersible pump I communicates with the third-stage sedimentation tank, and the third-stage sedimentation tank is provided with a submersible pump II.

The water level observation well is arranged within the range of 1-3m outside the water-stop curtain of the foundation pit, and an automatic water level detection device is arranged in the water level observation well,

The recharge water tank has a water inlet and a water outlet, the water inlet is connected to the submersible pump II in the three-stage sedimentation tank, the water outlet is connected to each recharge well, and a pipeline pump is arranged at the water outlet.

The control part includes an automatic water level monitoring device in the water level observation well, the signal output end of the automatic water level detection device is connected to the signal input end of the alarm, the signal output end of the alarm is connected to the signal input end of the AC contactor, and the signal output of the AC contactor The output end is connected to the control end of the pipeline pump.

The automatic water level monitoring device is a liquid level transmitter.

The three-stage sedimentation tank is also provided with a branch connecting the municipal pipe network and water for greening construction.

The control part also includes a liquid level controller installed in the recharge water tank, and the signal output terminal of the liquid level controller controls the opening and closing of the three-stage sedimentation tank, the municipal pipe network and the water connection branch for greening construction.

The recharge water tank is arranged outside the foundation pit, in the middle of the dewatering well and the recharge well.

Compared with the prior art, the utility model has the following beneficial effects:

1) The groundwater extracted by precipitation in the deep foundation pit is used as the water source for groundwater recharge outside the deep foundation pit, which ends the history of using urban tap water for groundwater recharge and saves a lot of water resources.

2) The automatic monitoring and alarm technology of groundwater level is adopted to ensure the timeliness and accuracy of water level monitoring, and realize timely alarm. The whole process does not require personnel to participate, reducing manpower input and facilitating the timeliness of recharge management.

3) The intelligent automatic control technology is adopted to realize automatic recharging and automatic stop in the whole process without personnel participation, and is closely related to the change of water level, ensuring the timely, quality and controllable recharging.

4) The whole process adopts the technology of automatic replenishment of recharge water tank, automatic water level monitoring and alarm, automatic start and stop of recharge, which realizes the intelligentization and full automation of the whole system from recharge water, water level monitoring and recharge, ensuring Improve the timeliness and quality of recharge; no need for personnel to participate, greatly reducing manpower input and saving a lot of labor costs.

Description of drawings

Fig. 1 is the schematic diagram of the utility model system

In the figure: 1-dewatering well, 2-reinjection well, 3-groundwater level observation well, 4-water level automatic monitoring device, 5-recharge water tank, 6-submersible pump Ⅰ, 7-tertiary sedimentation tank, 8-submersible Pump Ⅱ, 9-pipeline pump, 10-liquid level sensor, 11-connection to municipal pipe network and water for greening construction, 12-AC contactor, 13-electric control box.

detailed description

The specific embodiment of the utility model will be further described in conjunction with the accompanying drawings.

Groundwater monitoring, alarm and automatic recharge system outside the deep foundation pit, including several dewatering wells, water level observation wells, several recharge wells, recharge water tanks and control parts,

Each of the dewatering wells is set inside the foundation pit, and a submersible pump I for extracting groundwater is arranged in the dewatering well, and the submersible pump I communicates with the third-stage sedimentation tank, and the third-stage sedimentation tank is provided with a submersible pump II.

The water level observation well is arranged within the range of 1-3m outside the water-stop curtain of the foundation pit, and an automatic water level detection device is arranged in the water level observation well,

The recharge water tank has a water inlet and a water outlet, the water inlet is connected to the submersible pump II in the three-stage sedimentation tank, the water outlet is connected to each recharge well, and a pipeline pump is arranged at the water outlet.

The control part includes an automatic water level monitoring device in the water level observation well, the signal output end of the automatic water level detection device is connected to the signal input end of the alarm, the signal output end of the alarm is connected to the signal input end of the AC contactor, and the signal output of the AC contactor The output end is connected to the control end of the pipeline pump.

The automatic water level monitoring device is a liquid level transmitter.

The three-stage sedimentation tank is also provided with a branch connecting the municipal pipe network and water for greening construction.

The control part also includes a liquid level controller installed in the recharge water tank, and the signal output terminal of the liquid level controller controls the opening and closing of the three-stage sedimentation tank, the municipal pipe network and the water connection branch for greening construction.

The recharge water tank is arranged outside the foundation pit, in the middle of the dewatering well and the recharge well.

The construction method of groundwater monitoring, alarm and automatic recharge outside the deep foundation pit based on the groundwater monitoring, alarm and automatic recharge system outside the deep foundation pit is as follows:

1) A number of dewatering wells are drilled inside the foundation pit, and submersible pumps I are installed in each dewatering well to extract groundwater.

2) A groundwater level observation well is set up in the groundwater level monitoring area, and the groundwater level monitoring area is within the range of 1-3m outside the water-stop curtain of the foundation pit.

3) Install an automatic water level monitoring device in the groundwater level observation well, the automatic water level monitoring device is connected to the water level display, and the automatic water level monitoring device is also connected to an alarm.

4) A recharge water tank is installed outside the foundation pit and in the middle of the dewatering well and the recharge well. The water inlet of the recharge water tank is connected to the submersible pump II in the third-stage sedimentation tank, and the water outlet of the recharge water tank is connected to several recharge wells through pipelines. A pipeline pump is installed on the pipeline near the water outlet of the recharge water tank, and a liquid level sensor is installed in the recharge water tank.

5) The submersible pump Ⅰ collects the groundwater drawn from each dewatering well and flows it into the third-stage sedimentation tank for sedimentation. The submersible pump II stores the sedimented water in the recharge water tank. The third-stage sedimentation tank also has another branch Connect the municipal pipe network and water for greening construction,

6) When the water level in the groundwater level observation well drops to the warning water level, the automatic water level monitoring device immediately outputs a signal to the alarm, and the alarm activates the AC contactor to control the opening of the pipeline pump valve, and the pipeline pump runs to inject water into the recharge well; After the water level in the groundwater level observation well reaches the normal water level, the automatic water level monitoring device outputs a signal to the alarm, and the alarm activates the AC contactor to control the closing of the pipeline pump valve, and the recharging ends.

7) When the liquid level in the recharge water tank reaches a high level, the liquid level sensor outputs a signal, and the groundwater collected by the dewatering well is discharged into the municipal pipe network and greening construction water through three-stage sedimentation.

Example 1:

1) Installation of recharge water tank

Arrange two recharge water tanks on the construction site, the water tanks are connected with the three-stage sedimentation tank of the dewatering system, a submersible pump is installed in the three-stage sedimentation tank, and a liquid level controller is installed in the water tank, which will automatically start when the water in the water tank needs to be replenished The submersible pump replenishes water to ensure the water for recharge. The other end of the water tank is connected with the return pipeline, and an electromagnetic switch valve is provided.

2) Installation of water level monitoring device in the observation well

After the construction of the observation well is completed, a water level monitor is installed in the observation well, and the normal water level and the warning water level are set, and the monitor is connected with the water level alarm.

3) Installation of backfill pipeline

When the groundwater recharge wells and water level observation wells are constructed and the recharge water tanks are installed, the recharge pipes and some automatic recharge equipment will be installed.

4) Overall debugging of equipment

After the construction and installation of recharge wells, observation wells, pipelines, water tanks, and automatic recharge equipment are completed, the entire equipment should be debugged to ensure the normal operation of the recharge system.

5) Groundwater level monitoring and alarm installation

The water level monitor of the underground water level observation well is connected with the water level alarm. When the ground water level drops to the warning position, the water level monitor transmits the signal to the water level alarm, and the alarm starts to alarm.

6) Automatic recharge system diagram

When the groundwater level reaches the alarm value, the recharge system starts to automatically recharge the groundwater. When the water level in the observation well reaches the warning water level, the water level monitor outputs a signal to the alarm, and the alarm activates the AC contactor, turns on the power supply of the electromagnetic switch valve, opens the switch valve, and injects water into the recharge well. When the water level in the observation well reaches the normal water level, the water level monitor outputs a signal to the alarm, and the alarm activates the AC contactor, cuts off the power supply of the electromagnetic switch valve, closes the switch valve, and the recharging ends.

Claims (5)

1. groundwater monitoring, alarm and automatic recharge system on the outside of a kind of deep basal pit, it is characterised in that including some dewatering wells, water Position observation well, some inverted wells, recharge water tank and control section,

Described each dewatering well is arranged on the inside of foundation ditch, and the immersible pump I for groundwater abstraction, immersible pump are provided with dewatering well I is connected with three-level sedimentation basin, and immersible pump II is provided with three-level sedimentation basin,

Described water level observation well is arranged in the range of the 1-3m on the outside of foundation pit waterproof curtain, and water level is provided with water level observation well Automatic detection device,

Described recharge water tank has water inlet and delivery port, and water inlet connects with the immersible pump II in three-level sedimentation basin, delivery port Being connected with each inverted well, water outlet sets pipeline pump,

Described control section includes the automatic water level monitoring device in water level observation well, water level automatic detection device signal output The signal input part of end connection alarm, the signal input part of the signal output part connection A.C. contactor of alarm, exchange connect The control terminal of the signal output part connecting pipe pump of tentaculum.

2. groundwater monitoring, alarm and automatic recharge system on the outside of deep basal pit according to claim 1, it is characterised in that institute The automatic water level monitoring device stated is fluid level transmitter.

3. groundwater monitoring, alarm and automatic recharge system, its feature exist on the outside of deep basal pit according to claim 1 or 2 Branch road connection city planting ductwork and greening construction water are additionally provided with three-level sedimentation basin.

4. groundwater monitoring, alarm and automatic recharge system on the outside of deep basal pit according to claim 3, it is characterised in that control System part also include recharge water tank in set fluid level controller, fluid level controller signal output part control three-level sedimentation basin with City planting ductwork and greening construction connect the unlatching and cut-out of branch road with water.

5. groundwater monitoring, alarm and automatic recharge system on the outside of deep basal pit according to claim 4, it is characterised in that return Case of pouring water is arranged at outer foundation ditch, dewatering well and inverted well centre position.