Foundation pit supporting structure and soil instability monitoring and early warning device

Abstract

A monitoring and early warning device for a foundation pit supporting structure and soil instability relates to the technical field of building construction and comprises a vertical pipe, a sound pickup, a sound insulation cover, a sound receiving and amplifying device and a loudspeaker, the outer wall of the vertical pipe is in close contact with a monitored object, and the vertical pipe can contain sound transmission liquid. The electric signal output end of the sound pickup is connected with the electric signal input end of the sound receiving and amplifying device, the electric signal output end of the sound receiving and amplifying device is connected with the electric signal input end of the loudspeaker, and the sound insulation cover is arranged at the upper end of the vertical pipe. The device has the advantages that the safety and the stability of a foundation pit supporting structure and a soil body around a foundation pit can be quickly judged, and field personnel can be timely informed to evacuate a dangerous area at the moment before an accident occurs.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building, especially to a foundation pit supporting structure and a monitoring and early warning device for soil body instability. BACKGROUND

[0002] The stability and safety of a building foundation pit supporting structure are crucial to the entire foundation pit project. The foundation pit supporting structure may be damaged or even collapse due to insufficient strength, rigidity, stability, improper construction, and other factors during use, endangering human life and safety. After the foundation pit supporting structure is put into use, its health condition needs to be monitored regularly (usually once every 1-3 days) and the monitoring results are reported to relevant parties or personnel using communication tools or paper documents. When an unsafe state occurs, an early warning is given to remind construction personnel whether to take appropriate measures for reinforcement or repair to prevent the foundation pit from collapsing. However, these preventive measures cannot completely prevent accidents from occurring, and occasionally sudden or unanticipated accidents may occur due to improper construction, weather, and changes in the surrounding environment. Therefore, it is important to inform on-site personnel to evacuate the dangerous area at the moment before an accident occurs.

[0003] Currently, there is no effective technical means for monitoring and early warning to inform on-site personnel to evacuate the dangerous area at the moment before an accident occurs. SUMMARY

[0004] The utility model aims to provide a foundation pit supporting structure and a monitoring and early warning device for soil body instability that can quickly determine the safety and stability of the foundation pit supporting structure and the surrounding soil body and inform on-site personnel to evacuate the dangerous area at the moment before an accident occurs.

[0005] The utility model is implemented as follows:

[0006] The utility model discloses a vertical pipe that can hold sound transmission liquid in close contact with the monitored object, a sound pickup placed inside the vertical pipe, a soundproof cover arranged at the top of the vertical pipe, a sound receiver and amplifier, and a loudspeaker. The electrical signal output end of the sound pickup is connected to the electrical signal input end of the sound receiver and amplifier, and the electrical signal output end of the sound receiver and amplifier is connected to the electrical signal input end of the loudspeaker. The soundproof cover is arranged at the upper end of the vertical pipe.

[0007] The soundproof cover completely blocks the sound between the inside of the monitored object and the outside of the vertical pipe, preventing external sound from entering the vertical pipe and interfering with the sound pickup result.

[0008] Preferably, the material of the vertical pipe is metal, and the inner wall of the vertical pipe has anti-rust properties.

[0009] The lower end of the vertical tube is closed, while the upper end is open. The inner wall has anti-rust properties to guide the microphone and prevent the vertical tube from being damaged by rust. It is made of metal, which has good sound conduction properties. The sound emitted by the monitored object is conducted through the metal to the sound-transmitting liquid loaded in the vertical tube, and then from the sound-transmitting liquid to the suction device.

[0010] Preferably, the microphone is waterproof.

[0011] Preferably, a recorder is provided, and the audio signal acquired by the microphone is transmitted to the recorder and recorded by the recorder.

[0012] Preferably, a solar power unit including a battery assembly is provided to provide power to the microphone, recorder, sound receiver and amplifier, and speaker.

[0013] Preferably, a wireless transmitter is provided to transmit the audio electrical signal transmitted by the microphone obtained by the sound receiver and amplifier, so that the remote management platform can receive and process it.

[0014] Preferably, the sound receiver and amplifier is equipped with a control device. After receiving the sound signals from the microphone regarding the foundation pit support structure and soil instability, the control device outputs an alarm signal to the loudspeaker to warn construction workers to evacuate the danger zone in time. Since the microphone receives sound signals regarding the foundation pit support structure and soil instability, construction workers may not be able to effectively identify and take evasive action without specialized training. The control device, upon receiving the sound signals from the microphone regarding the foundation pit support structure and soil instability, outputs a clear alarm signal (such as a Chinese language warning and escape prompt) to the loudspeaker, enabling construction workers to identify and take evasive action in a timely manner.

[0015] The method of using the monitoring and early warning device for foundation pit support structure and soil instability of this utility model is as follows:

[0016] S1: During the construction of the foundation pit support, according to the geological conditions and the foundation pit support plan, select a suitable location and drive the vertical pipe of the first foundation pit support structure and soil instability monitoring and early warning device into the soil being monitored, and use a soundproof cover to seal the top of the vertical pipe for protection.

[0017] If the foundation pit support requires the erection of support piles, according to the foundation pit support plan, select a suitable location to install the first foundation pit support structure and soil instability monitoring and early warning device vertical pipe in the support pile, pour in sound-transmitting liquid, place the microphone, and then seal the top with a soundproof cover for protection.

[0018] When the foundation pit support structure and soil become unstable, a corresponding sound will be emitted. The sound is transmitted through the vertical pipe and the sound-transmitting liquid inside the vertical pipe to the microphone. After receiving the sound, the microphone converts it into an audio electrical signal and transmits it to the sound receiver and amplifier. The amplifier amplifies the audio electrical signal and transmits it to the loudspeaker, which then broadcasts it to warn nearby construction workers to evacuate the construction site in time.

[0019] A sound receiver and amplifier equipped with a control device is used. After receiving the sound electrical signals of the foundation pit support structure and soil instability from the receiver, the control device outputs a clear alarm electrical signal that is easy for construction personnel to identify to the loudspeaker, so that construction personnel can identify the alarm in time and take actions to avoid danger.

[0020] In the initial stage of internal failure of reinforced concrete structures in building foundation pit support, the initial signs are typically the slight expansion of cracks and relative displacement between the concrete and reinforcing steel. As the cracks further expand and deepen, the reinforced concrete support structure will emit more pronounced low-frequency cracking sounds. These sounds are usually dull and prolonged, clearly reflecting the internal damage of the structure. The appearance of continuous low-frequency cracking sounds often indicates that the structure has suffered relatively serious damage, and is a precursor to severe structural failure or instability.

[0021] When the soil at the edge of a building foundation pit reaches a point of instability and collapse, a dull, deafening, noisy, and continuously rolling mixed sound of instability and collapse will generally be heard. Before the soil at the edge of the pit becomes unstable and collapses, there are already early signs of instability inside the soil, including the sound of particles shifting, rubbing, and the expansion of soil cracks, as well as the sound of water leaking from underground pipes. These sounds may continue to expand until they become a clear mixed sound of instability and collapse. Combined with factors such as construction and climate, this can easily lead to the instability and collapse of the soil at the edge of the foundation pit.

[0022] Construction sites are noisy, and during the period from the onset of damage to instability in the foundation pit support structure and surrounding soil, especially in the moments before instability, it is very difficult for workers to hear the signs of instability in the foundation pit support structure and surrounding soil. This makes it easy for workers to miss the opportunity to escape the danger zone in the moments before the soil collapses.

[0023] Using the technology of this utility model application, a vertical pipe is used to penetrate deep into the monitored object. At the same time, a sound-transmitting liquid is loaded into the vertical pipe so that the sound emitted by the instability of the foundation pit support structure and soil is transmitted through the vertical pipe and the sound-transmitting liquid to the microphone placed in the sound-transmitting liquid inside the vertical pipe. The foundation pit monitoring device then issues an alarm so that the surrounding construction personnel can evacuate the construction site in time based on the alarm and avoid accidents that cause casualties.

[0024] Compared with existing technologies, this utility model has the advantages of being able to quickly determine the safety and stability of the foundation pit support structure and the surrounding soil, and to promptly inform on-site personnel to evacuate the danger zone just before an accident occurs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the foundation pit support structure and the monitoring and early warning device for soil instability of this utility model;

[0026] Figure 2 Example 1 illustrates the method of using a monitoring and early warning device for foundation pit support structure and soil instability.

[0027] Figure 3 Example 2 illustrates the method for using a monitoring and early warning device for foundation pit support structure and soil instability.

[0028] Explanation of icon numbers:

[0029] B-Soil; C-Foundation pit support; D-Slope; E-Slope protection; F-Horizontal support beam; G-Foundation pit monitoring device; h-Water-stop curtain; 1-Monitored object; 2-Sound-transmitting liquid; 3-Vertical pipe; 4-Pickup; 5-Soundproof cover; 6-Sound receiver and amplifier; 7-Speaker; 8-Rack; 9-Recorder; 10-Solar power supply assembly; 11-Wireless transmitter; 12-Sliding surface. Detailed Implementation

[0030] The monitoring and early warning device for foundation pit support structure and soil instability of this utility model will now be described in further detail with reference to the accompanying drawings and embodiments:

[0031] like Figure 1 As shown, the monitoring and early warning device for foundation pit support structure and soil instability of the present invention includes a vertical pipe 3 that can hold sound-transmitting liquid 2 (water) with its outer wall in close contact with the monitored object 1, a microphone 4 placed inside the vertical pipe 3, a soundproof cover 5 set on the top of the vertical pipe 3, a sound receiver and amplifier 6, and a loudspeaker 7. The sound receiver and amplifier 6 and the loudspeaker 7 are set on a frame 8. The electrical signal output terminal of the microphone 4 is connected to the electrical signal input terminal of the sound receiver and amplifier 6, and the electrical signal output terminal of the sound receiver and amplifier 6 is connected to the electrical signal input terminal of the loudspeaker 7. The soundproof cover 5 is set on the upper end of the vertical pipe 3.

[0032] Preferably, the vertical pipe 3 is made of metal, and the inner wall of the vertical pipe 3 has rust-proof properties.

[0033] Preferably, the microphone 4 is waterproof.

[0034] Preferably, a recorder 9 is provided and fixed on the frame 8. The audio signal acquired by the pickup 4 is transmitted to the recorder 9 and recorded by the recorder 9.

[0035] Preferably, a solar power assembly 10 including a battery is provided so as to provide power to the microphone 4, the recorder 9, the sound receiver and amplifier 6 and the speaker 7.

[0036] Preferably, a wireless transmitter 11 is provided to transmit the audio electrical signal transmitted by the microphone 4 obtained by the sound receiver and amplifier, so that the remote management platform can receive and identify the signal, and determine the instability location of the foundation pit support structure and the soil, so as to carry out targeted treatment in the future.

[0037] Preferably, the sound receiver and amplifier 6 is equipped with a control device. After receiving the sound signal of the foundation pit support structure and soil instability from the receiver 4, the control device can directly output a voice alarm signal to the speaker 7, or it can compare it with the pre-stored sound signal of the foundation pit support structure and soil instability to confirm that it is the sound of foundation pit support structure and soil instability, so as to avoid false alarms, and then output a voice alarm signal to the speaker 7 to warn the construction personnel to escape the danger zone in time.

[0038] like Figure 2 , 3 As shown, the method of using the monitoring and early warning device for foundation pit support structure and soil instability in Embodiment 1 of this utility model is as follows:

[0039] S1: During the construction of foundation pit support or slope protection, according to the geological conditions and the foundation pit support or slope protection scheme, select a suitable location behind the water-stop curtain H, drive the vertical pipe 3 of the first foundation pit support structure and soil instability monitoring and early warning device A into the soil B (monitored object 1) to be tested (monitored object 1), pour the sound-transmitting liquid 2 into the vertical pipe 3, place the microphone 4, and then seal the top of the vertical pipe 3 with the soundproof cover 5 for protection. Starting from the frame 8, set up the foundation pit monitoring device, including the sound receiver and amplifier 6 and the loudspeaker 7, at the water-stop curtain H near the corresponding vertical pipe 3 and put it into use.

[0040] When soil B (monitoring object 1) becomes unstable, it slides along the sliding surface 12 and emits a corresponding sound. The sound is transmitted through the vertical pipe 3 and the sound-transmitting liquid 2 inside the vertical pipe 3 to the microphone 4. After receiving the sound, the microphone 4 converts it into an audio electrical signal and transmits it to the sound receiver and amplifier 6. The amplifier amplifies the audio electrical signal and transmits it to the loudspeaker 7, which then broadcasts it to warn nearby construction workers to evacuate the construction site in time.

[0041] A sound receiver and amplifier 6 equipped with a control device is used. After receiving the sound electrical signals of the foundation pit support structure and soil instability from the receiver, the control device outputs a clear voice alarm electrical signal that is easy for construction personnel to recognize to the loudspeaker 7, so that construction personnel can identify and take actions to avoid danger in a timely manner.

[0042] like Figure 2 As shown, during the slope protection construction, the earthwork is excavated in sequence, first layer and second layer. After each layer is excavated and the slope protection is completed, the second foundation pit support structure and the vertical pipe 3 of the soil instability monitoring and early warning device A are installed on the soil slope D. The foundation pit monitoring device G, including the sound receiver and amplifier 6 and the loudspeaker 7, is installed at the slope protection point E of the corresponding vertical pipe 3 via the frame 8 and put into use.

[0043] like Figure 3 As shown, during the construction of the foundation pit support, while completing foundation pit support C, a third [structure / structure] is installed on foundation pit support C.

[0044] If the foundation pit support C requires the installation of multiple layers of horizontal support beams F, a fourth support beam should be installed at a suitable location on each layer of horizontal support beam F, depending on the foundation pit support scheme.

[0045] Before the horizontal support beam F is put into use, the aforementioned foundation pit monitoring device will be installed and put into use at the corresponding vertical pipe 3.

Claims

1. A foundation pit supporting structure and a device for monitoring and early warning of soil body instability, characterized in that, The vertical pipe containing the sound transmission liquid is in close contact with the outer wall and the monitoring object, the pickup is placed inside the vertical pipe, the sound insulation cover is arranged at the top of the vertical pipe, the sound receiving and amplifying device and the loudspeaker are arranged, the electrical signal output end of the pickup is connected with the electrical signal input end of the sound receiving and amplifying device, the electrical signal output end of the sound receiving and amplifying device is connected with the electrical signal input end of the loudspeaker, and the sound insulation cover is arranged at the upper end of the vertical pipe.

2. The foundation pit supporting structure and soil body instability monitoring and early warning device according to claim 1, characterized in that, The material of the vertical pipe is metal, and the inner wall of the vertical pipe has rust-proof performance.

3. The foundation pit supporting structure and soil body instability monitoring and early warning device according to claim 2, characterized in that, The pickup has a waterproof function.

4. The foundation pit supporting structure and soil body instability monitoring and early warning device according to claim 1 or 2 or 3, characterized in that, The audio signal conducted by the pickup is conducted to the recorder and recorded by the recorder.

5. The foundation pit supporting structure and soil body instability monitoring and early warning device according to claim 4, characterized in that, A solar power assembly containing a battery assembly is arranged to provide power to the pickup, the recorder, the sound receiving and amplifying device and the loudspeaker through the solar power assembly.

6. The foundation pit supporting structure and soil body instability monitoring and early warning device according to claim 1 or 2 or 3 or 5, characterized in that, The sound receiving and amplifying device is provided with a control device, which receives the electrical signal of the sound of the foundation pit support structure and the soil body instability of the pickup, and outputs an alarm electrical signal to the loudspeaker to warn the construction personnel to escape from the dangerous area in time.

7. The foundation pit supporting structure and soil body instability monitoring and early warning device according to claim 6, characterized in that, A wireless transmitter is arranged to transmit the audio electrical signal conducted by the pickup obtained by the sound receiving and amplifying device, so that the remote management platform receives and identifies and processes.

Images