CN214460433U - Air pressure slow-pushing type multidimensional monitoring and early warning device for deep foundation pit - Google Patents

Abstract

A gas pressure slow-pushing type multidimensional monitoring and early warning device for a deep foundation pit is characterized in that a top valve of a glass inner shell is used for adding a dilute hydrochloric acid solution and zinc particles, the outer side of the wall of a glass reaction tank is used for adding the dilute hydrochloric acid solution, and the inner side of the glass reaction tank is a reaction tank; the glass inner shell keeps closed, and a second scale is marked between the piston and the infrared sensor; the bonding layer is used for bonding the bottom of the glass inner shell and the upper concrete outer shell, the middle concrete outer shell is connected with the lower concrete outer shell through threads, a PVC monitoring pipe is arranged in the lower concrete outer shell, and the floating block is positioned in the PVC monitoring pipe; the distance measuring instrument is fixedly connected with the bottom of the bonding layer; the bottom of the PVC monitoring pipe is provided with a small hole; the outer side of the upper concrete shell is marked with a first scale. The utility model discloses not only can realize carrying out accurate quick monitoring to the inhomogeneous settlement of foundation ditch, but also can monitor the subsiding of ground water level lift and stratum simultaneously.

Description

Air pressure slow-pushing type multidimensional monitoring and early warning device for deep foundation pit

Technical Field

The utility model relates to a deep basal pit monitoring technology field specifically is a deep basal pit warp, groundwater goes up and down, stratum settlement monitoring alarm device.

Background

At present, monitoring of the deep foundation pit is realized mostly by means of regular monitoring of measuring instruments such as a total station and the like, the foundation pit inclination deformation can be monitored, but underground water level lifting and stratum settlement cannot be measured, and the function is single. And the measuring instruments such as a total station instrument are used for monitoring the inclined deformation of the foundation pit, so that although the deformation condition of the foundation pit can be accurately known, 24-hour uninterrupted continuous monitoring cannot be realized. In order to meet the requirement of the measuring device for measuring the underground water level and the stratum settlement, a plurality of sets of devices are required, and the integrity is not strong.

Disclosure of Invention

In order to overcome current deep basal pit deformation measurement monitoring devices measurement content single, device wholeness is poor not enough etc, the utility model provides a measure multi-functional measuring device that ground water level, stratum subside, bottom slope warp can overcome the shortcoming of above-mentioned conventional deep basal pit deformation monitoring devices and method effectively. The device not only can realize accurate and rapid monitoring of the uneven settlement of the foundation pit, but also can simultaneously monitor the rise and fall of the underground water level and the settlement of the stratum.

The utility model provides a technical scheme that its technical problem adopted is:

an air pressure slow-pushing type multidimensional monitoring and early warning device for a deep foundation pit comprises a lower concrete outer shell, a glass inner shell, an upper concrete outer shell, a middle concrete outer shell and a glass reaction tank; the top valve of the glass inner shell is used for adding dilute hydrochloric acid solution and zinc particles, the outer side of the wall of the glass reaction tank is marked with symmetrical scales, the outer side of the wall of the glass reaction tank is used for adding the dilute hydrochloric acid solution, and the inner side of the glass reaction tank is provided with the reaction tank which is used for adding the zinc particles and carrying out chemical reaction; the glass inner shell is kept closed, the volume of generated gas is represented by the movement of the piston, and a second scale is marked between the piston and the infrared sensor and used for observing the volume of the gas generated by reaction in the glass inner shell; the bonding layer is used for bonding the bottom of the glass inner shell and the upper concrete outer shell, the middle concrete outer shell is connected with the lower concrete outer shell through threads, a PVC monitoring pipe is arranged in the lower concrete outer shell, the floating block is positioned in the PVC monitoring pipe, and the floating block rises and falls along with the underground water level; the distance measuring instrument is fixedly connected with the bottom of the bonding layer and matched with the signal reflecting device on the upper part of the floating block; the bottom of the PVC monitoring pipe is provided with a small hole; the outer side of the upper concrete shell is marked with a first scale for measuring the settlement of the stratum.

Furthermore, the device also comprises a top box, wherein a power supply is arranged in the top box, provides power for the distance measuring instrument, the infrared sensor, the display, the wireless signal transmitting device and the alarm, and is connected with the distance measuring instrument, the infrared sensor, the display, the wireless signal transmitting device and the alarm through leads.

Still further, the piston cooperates with infrared sensor, infrared sensor passes through the siren of wire transmission to the top incasement, the siren passes through wireless signal emitter and launches to the computer.

Preferably, the PVC monitoring pipe is provided with a filtering device at the bottom, so that soil is prevented from entering the device along with water flow.

The utility model provides a atmospheric pressure slows pushing-type multidimension monitoring early warning device for deep basal pit can measure the angle of soil layer slope, the lift volume of ground water level, the settlement volume of stratum through the deformation of deep basal pit, the change of ground water level, the settlement of stratum.

The beneficial effects of the utility model are that: (1) the measuring device is integrated, so that the inclination deformation angle of the soil layer can be measured, and the lifting amount of the underground water level and the settlement amount of the stratum can also be measured. (2) The monitoring effect is good. After the foundation pit and the underground water are deformed and lifted, the device can measure three deformation quantities quickly. (3) Convenient operation, low cost and environment-friendly materials. The device has the advantages of detachable parts, convenient operation, low cost of dilute hydrochloric acid and zinc particles required by the device, and capability of recycling the salt after reaction, namely zinc chloride (which has wide application range and is widely used for printing and dyeing and manufacturing dyes).

Drawings

FIG. 1 is a front view of the apparatus;

FIG. 2 is a cross-sectional view of the inner glass envelope (upper assembly);

FIG. 3 is a cross-sectional view of the lower apparatus;

FIG. 4 is an internal view of the top case 3;

FIG. 5 is a sectional view taken along line A-A;

FIG. 6 is a top view of the device placement;

wherein: 1. a valve; 2. a bubble level; 3. a top box; 4. a bonding layer; 5. a range finder; 6. backfilling; 7. a rubber grommet; 8. a lower concrete shell (lower unit); 9. inner glass shell (lower device); 10. a wire; 11. an upper concrete shell; 12. a small hole; 13. a first scale; 14. a medium concrete shell (middle device); 15. a threaded interface; 16. the wall of the glass reaction tank; 17. a dilute hydrochloric acid solution; 18. a second scale; 19. an infrared sensor; 20. a piston; 21. a glass reaction tank; 22. zinc particles; 23. a triangular bracket; 24. a filtration device; PVC monitoring pipes; 26. a signal reflection device; a floating block; 28. a lower aperture; 29. a display; 30. a wireless signal transmitting device; 31. a power source; an alarm.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 6, an air pressure slow-pushing type multidimensional monitoring and early warning device for a deep foundation pit comprises a valve 1, a bubble level 2, a top box 3, a bonding layer 4, a distance meter 5, backfill soil 6, a rubber backing ring 7, a lower concrete outer shell 8 (lower device), a glass inner shell 9 (lower device), a lead 10, an upper concrete outer shell 11, a small hole 12, a first scale 13, a middle concrete outer shell 14 (middle device), a threaded interface 15, a glass reaction tank wall 16, a dilute hydrochloric acid solution 17, a second scale 18, an infrared sensor 19, a piston 20, a glass reaction tank 21, zinc particles 22, a triangular bracket 23, a filtering device 24, a PVC monitoring pipe 25, a signal reflection device 26, a floating block 27, a lower small hole 28, a display 29, a wireless signal emission device 30, a power supply 31 and an alarm 32;

the top three valves 1 are used for adding dilute hydrochloric acid solution 17 and zinc particles 22, the outer side of the glass reaction tank wall 16 is marked with symmetrical scales, the outer side is used for adding the dilute hydrochloric acid solution 17, and the inner side is a reaction tank which is used for adding the zinc particles 22 and carrying out chemical reaction. The top box 3 is internally provided with a power supply 31 which supplies power to the distance measuring instrument 5, the infrared sensor 19, the display 29, the wireless signal transmitting device 30 and the alarm 32, and is connected with the latter through a lead 10. The glass inner shell (upper device) 9 can be taken out entirely, which is more convenient for the disassembly of the whole device. The reason for using a glass material for the container is to protect the dilute hydrochloric acid solution 17 therein. The glass inner envelope (upper device) 9 is kept closed and the volume of gas generated is represented by the movement of the piston 20. A second scale 18 is marked between the piston 20 and the infrared sensor 19 for observing the volume of gas generated by the reaction in the inner glass shell (upper device) 9. When the piston 20 moves beyond the infrared sensor 19, the infrared sensor 19 is transmitted to the alarm 32 in the top case 3 through the wire 10, an alarm is issued, and information is transmitted to the computer through the wireless signal transmitting device 30. Thus, the alarm value can also be changed by changing the initial position of the piston 20. The adhesive layer 4 is used to bond the bottom of the glass inner shell (upper unit) 9 and the upper concrete outer shell 11 to prevent a gap from being generated therebetween. The middle concrete shell 14 is connected with the lower concrete shell 8 through threads, so that the disassembly is convenient, and the proper device height can be selected according to the thickness of a soil layer. The floating block 27 can rise (fall) as the ground water level rises (falls). Distancer 5 and 4 bottom fixed connection in tie coat, distancer 5 is through to the inside transmission signal of PVC monitoring pipe 25, and the signal gets back to distancer 5 after the signal reflection device 26 reflection on floating block 27 upper portion, records the distance of distancer 5 bottom to floating block 27 top, transmits to the inside display 29 of top case 3 through the wire to accessible wireless signal transmitting device 30 sends to the computer. The PVC monitoring pipe 25 is provided with a filter unit 28 at the bottom to prevent soil from entering the unit with the water flow. To allow the water to pass through, the bottom of the device is provided with small holes 28. The outer side of the upper concrete shell 11 is marked with a first scale 13 for measuring the settlement of the stratum.

In this embodiment, the foundation pit inclination deformation is measured: when the foundation pit is inclined and deformed, the inclination of the soil body drives the inclination of the device, the liquid level of the dilute hydrochloric acid 17 is always kept absolute horizontal due to gravity, and when the inclination exceeds a certain angle (1 ℃), the liquid level of the dilute hydrochloric acid 17 crosses the groove wall 16 of the glass reaction groove and is subjected to replacement reaction with the zinc particles 22 in the glass reaction groove 21 to generate hydrogen and zinc chloride. Because the glass inner shell 9 is closed, the piston 20 is slowly pushed in the form of air pressure after the hydrogen is generated, the molar quantity generated by the hydrogen is observed through the change of the second scale 18 of the piston 20, and the cross section area of the pipe orifice is 113 square centimeters. From the chemical equation: the consumption of the dilute hydrochloric acid 17 was calculated as Zn +2HCl ═ ZnCl2+ H2 ═ c. The angle of inclination of the apparatus was obtained from the relationship between the consumption of dilute hydrochloric acid 17 and the consumption of the control solution and the angle of inclination (Table 1). When the foundation pit inclines beyond the dangerous angle (2 degrees), the piston moves to the position of the infrared sensor 19, the infrared sensor 19 is transmitted to the alarm 32 in the top box 3 through the lead 10, an alarm is given out, and the alarm is transmitted to the computer. The dangerous tilt angle can be changed by changing the initial position of the piston 20.

TABLE 1 relationship of inclination angles

Measuring the rise and fall of the underground water level: groundwater may enter the holding bed by seepage and enter the device through small holes 28 in the bottom of the device. After the groundwater passes through the filter unit 24, sludge is filtered off and the groundwater enters the PVC monitoring pipe 25. The floating block 27 has buoyancy and can ascend (descend) along with the ascending (descending) of the underground water level, the distance measuring instrument 5 transmits signals to the inside of the PVC monitoring pipe 25, the signals are reflected by the signal reflection device 26 on the upper part of the floating block 27 and then return to the distance measuring instrument 5, the distance from the bottom of the distance measuring instrument 5 to the top of the floating block 27 is measured, and the signals are transmitted to the display 29 inside the top box 3 through the lead 10. After the device is buried and stabilized, the readings can be transmitted to a computer by a wireless signal transmitting device 30 to obtain the initial groundwater level epsilon. The initial water table epsilon can also be derived by observing the display 29 readings. After the groundwater level changes, the value ae of the wireless signal transmitting device 30 received by the computer, or the display reading e is observed, the change e-e of the groundwater level is obtained, and the change of the value can be larger than the value e-e, namely the lifting amount of the groundwater level.

Measuring sludge stratum settlement: when the device is buried, the device is driven into a bearing stratum below underground water, the bottom of the device is ensured to be fixed, and the whole device is relatively static and does not generate vertical displacement along with the settlement of an outside silt soil layer. The concrete shell 14 is marked with a first scale 13 on the outer side. After the device is buried, the numerical value of the first scale 13 is read, namely the initial scale alpha. After sedimentation has occurred, the value of the first mark 13 is read again, i.e. the mark a after sedimentation. The difference α -a between the two is the amount of sediment in the silt formation.

The operation method of the air pressure slow-pushing type multi-dimensional monitoring and early-warning device for the deep foundation pit comprises the following steps:

1) before the device (without the glass inner shell) is placed, the soil layer is punched, and a moving space is reserved upwards from the bottom one third of the device for burying the backfill 6. The direction that the device was placed depends on the direction of foundation ditch sideline, satisfies that glass reaction tank cell wall 16 and foundation ditch sideline parallel placement can, as shown in fig. 6.

2) The middle device 14 is selected to have a suitable length according to the depth of the perforation, and the middle device 14 and the lower device 8 are connected by a screw interface 15 and placed in the hole in the correct orientation.

3) After the device is placed into the hole, the bubble level 2 is checked, and backfill soil 6 is filled after the bubble level 2 is horizontal, so that the stability of the device is improved, and the device is ensured to be relatively vertical.

4) After the device is relatively vertical, the glass inner shell (upper device) 9 is placed, three valves 1 are opened, and dilute hydrochloric acid solution 17 (adopting 25.2% dilute hydrochloric acid with the density of 1.125 g/cm) is added at two sides³) And proper amount of zinc particles 22 are added in the middle.

5) Reading the initial scale value at the piston 20 and recording as gamma; reading the value of the distance meter 5 displayed on the display 29 and recording as e (the value of the distance meter 5 can be viewed by the computer in real time); the value of the first scale 13 outside the concrete shell 14 is read and recorded as a.

6) And reading the scale value of the piston 20 after the soil layer is inclined and deformed, recording the scale value as gamma, wherein gamma-gamma is the gas generation amount, and obtaining the inclination angle of the device by contrasting a relational comparison table between the gas generation and the inclination angle.

The value ae of the wireless signal transmitting device 30 after the groundwater level is lifted is read out, or the display reading e is observed, the change e-e of the groundwater level is obtained, and the change size e-e of the value is the lifting amount of the groundwater level.

After the sedimentation has taken place, the value of the first mark 13 is read, i.e. the mark a after sedimentation. The difference α -a between the two is the amount of sediment in the silt formation.

The embodiments described in this specification are merely examples of implementations of the inventive concepts, which are intended for illustrative purposes only. The scope of the present invention should not be construed as being limited to the specific forms set forth in the following description, but rather should be construed as encompassing all the equivalent technical means which may be conceived by one of ordinary skill in the art based on the teachings of the present invention.

Claims (4)

1. An air pressure slow-pushing type multi-dimensional monitoring and early warning device for a deep foundation pit is characterized by comprising a lower concrete outer shell, a glass inner shell, an upper concrete outer shell, a middle concrete outer shell and a glass reaction tank; the top valve of the glass inner shell is used for adding dilute hydrochloric acid solution and zinc particles, the outer side of the wall of the glass reaction tank is marked with symmetrical scales, the outer side of the wall of the glass reaction tank is used for adding the dilute hydrochloric acid solution, and the inner side of the glass reaction tank is provided with the reaction tank which is used for adding the zinc particles and carrying out chemical reaction; the glass inner shell is kept closed, the volume of generated gas is represented by the movement of the piston, and a second scale is marked between the piston and the infrared sensor and used for observing the volume of the gas generated by reaction in the glass inner shell; the bonding layer is used for bonding the bottom of the glass inner shell and the upper concrete outer shell, the middle concrete outer shell is connected with the lower concrete outer shell through threads, a PVC monitoring pipe is arranged in the lower concrete outer shell, the floating block is positioned in the PVC monitoring pipe, and the floating block rises and falls along with the underground water level; the distance measuring instrument is fixedly connected with the bottom of the bonding layer and matched with the signal reflecting device on the upper part of the floating block; the bottom of the PVC monitoring pipe is provided with a small hole; the outer side of the upper concrete shell is marked with a first scale for measuring the settlement of the stratum.

2. The air pressure slow-pushing type multi-dimensional monitoring and early-warning device for the deep foundation pit as claimed in claim 1, further comprising a top box, wherein a power supply is arranged in the top box, supplies power to the distance measuring instrument, the infrared sensor, the display, the wireless signal transmitting device and the alarm, and is connected with the distance measuring instrument, the infrared sensor, the display, the wireless signal transmitting device and the alarm through leads.

3. The air pressure slow-pushing type multi-dimensional monitoring and early-warning device for the deep foundation pit as claimed in claim 1 or 2, wherein the piston is matched with an infrared sensor, the infrared sensor is transmitted to an alarm in the top box through a lead, and the alarm is transmitted to a computer through a wireless signal transmitting device.

4. The air pressure slow-pushing type multidimensional monitoring and early-warning device for the deep foundation pit as claimed in claim 1 or 2, wherein the bottom of the PVC monitoring pipe is provided with a filtering device for preventing soil from entering the device along with water flow.

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