Foundation pit supporting structure, soil body instability monitoring and early warning device and using method of foundation pit supporting structure and soil body instability monitoring and early warning device

Abstract

The invention discloses a foundation pit supporting structure and soil instability monitoring and early warning device and a using method thereof, and relates to the technical field of building construction, the foundation pit supporting structure and soil instability monitoring and early warning device comprises a vertical pipe with the outer wall in close contact with a monitored object and capable of containing sound transmission liquid, a sound pickup placed in the vertical pipe, a sound insulation cover arranged at the top of the vertical pipe, a sound receiving and amplifying device and a loudspeaker, 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 method has the advantages that the safety and the stability of the foundation pit supporting structure and the soil body around the foundation pit can be rapidly 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 present invention relates to the field of construction technology, in particular to a foundation pit support structure, a device for monitoring and warning of soil mass instability, and a method for using the same. Background Art

[0002] The stability and safety of the building foundation pit support structure are crucial for the entire foundation pit project. During the operation of the foundation pit support structure, it may be damaged or even collapsed due to insufficient strength, stiffness, stability, improper construction and other factors, endangering people's lives. Usually, after the foundation pit support structure is put into use, it is necessary to regularly monitor the health status of the foundation pit support structure (usually once every 1 to 3 days), and report the monitoring results to relevant parties or personnel by means of communication tools or paper documents. When an unsafe state appears, a warning is given to remind the construction personnel whether corresponding measures need to be taken for reinforcement or repair to prevent the foundation pit from collapsing. In fact, these preventive measures cannot completely prevent accidents from occurring. Occasionally, sudden or unforewarned accidents may occur due to factors such as improper construction, climate, and changes in the surrounding environment. Therefore, it is very important to be able to timely inform the on-site personnel to evacuate the dangerous area at the moment before the accident occurs.

[0003] At present, there is no effective technical means for monitoring and warning, so as to timely inform the on-site personnel to evacuate the dangerous area at the moment before the accident occurs. Summary of the Invention

[0004] The purpose of the present invention is to provide a foundation pit support structure, a device for monitoring and warning of soil mass instability, and a method for using the same, which can quickly judge the safety and stability of the foundation pit support structure and the soil around the foundation pit, and can timely inform the on-site personnel to evacuate the dangerous area at the moment before the accident occurs.

[0005] The foundation pit support structure and the device for monitoring and warning of soil mass instability of the present invention are realized as follows: It includes a vertical pipe capable of containing a sound-conducting liquid with its outer wall in close contact with the monitored object, a pick-up placed inside the vertical pipe, a sound insulation cover arranged at the top of the vertical pipe, a sound receiving and amplifying device, and a loudspeaker. The electrical signal output end of the pick-up is connected to the electrical signal input end of the sound receiving and amplifying device, and the electrical signal output end of the sound receiving and amplifying device is connected to the electrical signal input end of the loudspeaker. The sound insulation cover is arranged at the upper end of the vertical pipe.

[0006] The sound insulation cover completely cuts off the sound inside the monitored object and outside the vertical pipe, preventing external sound from entering the vertical pipe and interfering with the pick-up result.

[0007] Preferably, the material of the vertical pipe is metal, and the inner wall of the vertical pipe has anti-rust performance.

[0008] The lower end of the vertical pipe is closed, and the upper end is open. The inner wall has anti-rust performance and is used to introduce a pickup. This can prevent the vertical pipe from being damaged due to rust. It is made of metal, and by utilizing the good sound-conducting performance of the metal, the sound emitted by the monitored object is conducted through the metal to the sound-conducting liquid loaded in the vertical pipe, and then conducted by the sound-conducting liquid to the suction device.

[0009] Preferably, the pickup has a waterproof function.

[0010] Preferably, a recorder is provided, and the audio signal obtained by the pickup is conducted to the recorder and recorded by the recorder.

[0011] Preferably, a solar power supply component including a battery component is provided to supply power to the pickup, recorder, sound receiver and amplifier, and speaker through the solar power supply component.

[0012] Preferably, a wireless transmitter is provided, and the audio electrical signal conducted by the pickup obtained by the sound receiver and amplifier is transmitted through the wireless transmitter so that the remote management platform can receive and perform identification processing.

[0013] Preferably, the sound receiver and amplifier is provided with a control device. After the control device receives the sound electrical signal of the foundation pit support structure and soil instability from the pickup, it outputs an alarm electrical signal to the speaker to warn the construction personnel to escape from the dangerous area in time. Since the pickup receives the sound electrical signal of the foundation pit support structure and soil instability, if the construction personnel have not received special training, they may not be able to effectively identify and take actions to avoid danger. By using the control device, after receiving the sound electrical signal of the foundation pit support structure and soil instability from the pickup, it outputs a clear alarm electrical signal (such as Chinese language warning and Chinese language escape prompt) to the speaker, enabling the construction personnel to identify and take actions to avoid danger in time.

[0014] The usage method of the foundation pit support structure and soil instability monitoring and early warning device of the present invention is realized as follows, including: S1: During the construction of the foundation pit support, according to the geological conditions and the foundation pit support plan, select a suitable location, drive the vertical pipe of the first foundation pit support structure and soil instability monitoring and early warning device into the soil to be detected, and use a sound insulation cover to seal the top of the vertical pipe for protection; When it is necessary to erect support piles for the foundation pit support, according to the foundation pit support plan, select a suitable location to set the vertical pipe of the first foundation pit support structure and soil instability monitoring and early warning device in the support pile, pour the sound-conducting liquid, place the pickup, and then use a sound insulation cover to seal the top for protection; When the foundation pit support structure and the soil mass become unstable, corresponding sounds will be emitted. These sounds are transmitted through the vertical pipes and the sound-conducting liquid inside the vertical pipes to the pickup. After receiving the sound, the pickup converts it into an audio electrical signal and transmits it to the sound receiver and amplifier. The amplified audio electrical signal is then transmitted to the speaker and broadcast by the speaker to warn the nearby construction workers to evacuate the construction site in time; The sound receiver and amplifier are provided with a control device. After receiving the electrical signal of the unstable sound of the foundation pit support structure and the soil mass from the pickup, the control device outputs a clear warning electrical signal that is easy for construction workers to identify to the speaker, enabling the construction workers to identify it in time and take actions to avoid danger.

[0015] In the initial stage of internal damage of the reinforced concrete structure in building foundation pit support, it is usually manifested as the slight expansion of cracks and the relative displacement between the concrete and the steel bars. As the cracks further expand and deepen, the reinforced concrete support structure will emit more obvious low-frequency cracking sounds. These sounds are usually dull and last for a long time, and can clearly reflect the internal damage of the structure. The appearance of continuous low-frequency cracking sounds often means that the structure has suffered relatively serious damage, which is a sign before serious damage or instability of the structure.

[0016] When the soil mass on the edge of the building foundation pit reaches the stage of unstable failure and collapses, there will generally be a mixed unstable failure sound that is dull, deafening, noisy and continuously rolling. Before the soil mass on the edge of the pit undergoes unstable failure and collapses, there are actually early signs of instability inside the soil mass, including the sounds of particle dislocation, friction and the expansion and damage of soil cracks inside the soil mass, as well as the sound of underground pipeline leakage. It may continuously expand to an obvious mixed unstable failure sound. Considering construction and climate factors, etc., it is extremely easy to cause the unstable failure and collapse of the soil mass on the edge of the foundation pit.

[0017] There is a lot of noise at the building construction site. During the period from the beginning of the internal damage of the building foundation pit support structure and the surrounding soil mass to the unstable failure, especially in the instant before the unstable failure, it is very difficult for the operators to hear the sounds of the precursors of unstable failure inside the foundation pit support structure and the soil mass around the foundation pit, resulting in the operators being prone to miss the opportunity to escape from the dangerous area in the instant before the soil mass undergoes unstable failure and collapses.

[0018] Adopting the technology of this patent application, the vertical pipes are used to penetrate deep into the monitored object. At the same time, the vertical pipes are filled with sound-conducting liquid so that the sounds emitted by the instability of the foundation pit support structure and the soil mass can be conducted through the vertical pipes and the sound-conducting liquid to the pickup placed in the sound-conducting liquid inside the vertical pipes. A warning is issued through the foundation pit monitoring device so that the surrounding construction workers can evacuate the construction site in time according to the warning, avoiding the occurrence of accidents causing casualties.

[0019] Compared with the prior art, the present invention has the advantages of being able to quickly judge the safety and stability of the foundation pit support structure and the soil around the foundation pit, and being able to timely inform the on-site personnel to evacuate the dangerous area at the moment before an accident occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the foundation pit support structure and soil instability monitoring and early warning device of the present invention; Figure 2 It is the usage method of the foundation pit support structure and soil instability monitoring and early warning device in Embodiment 1; Figure 3 It is the usage method of the foundation pit support structure and soil instability monitoring and early warning device in Embodiment 2.

[0021] Explanation of the reference numerals in the drawings: B - soil; C - foundation pit support; D - soil slope; E - slope support; F - horizontal support beam; G - foundation pit monitoring device; h - water stop curtain; 1 - object to be monitored; 2 - sound-conducting liquid; 3 - vertical pipe; 4 - pickup; 5 - sound insulation cover; 6 - sound receiving and amplifier; 7 - speaker; 8 - frame; 9 - recorder; 10 - solar power supply component; 11 - wireless transmitter; 12 - slip surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Now, in combination with the drawings and embodiments, the foundation pit support structure and soil instability monitoring and early warning device of the present invention and its usage method will be further described in detail: As Figure 1 shown, the foundation pit support structure and soil instability monitoring and early warning device of the present invention includes a vertical pipe 3 that can hold a sound-conducting liquid 2 (water) and whose outer wall is in close contact with the object to be monitored 1, a pickup 4 placed inside the vertical pipe 3, a sound insulation cover 5 provided at the top of the vertical pipe 3, a sound receiving and amplifier 6, and a speaker 7. The sound receiving and amplifier 6 and the speaker 7 are provided on a frame 8. The electrical signal output end of the pickup 4 is connected to the electrical signal input end of the sound receiving and amplifier 6, and the electrical signal output end of the sound receiving and amplifier 6 is connected to the electrical signal input end of the speaker 7. The sound insulation cover 5 is provided at the upper end of the vertical pipe 3.

[0023] Preferably, the material of the vertical pipe 3 is metal, and the inner wall of the vertical pipe 3 has anti-rust performance.

[0024] Preferably, the pickup 4 has a waterproof function.

[0025] Preferably, a recorder 9 fixed on the frame 8 is provided, and the audio signal obtained by the pickup 4 is conducted to the recorder 9 and recorded by the recorder 9.

[0026] Preferably, a solar power supply assembly 10 including a battery assembly is provided to supply power to the pickup 4, the recorder 9, the sound receiver and amplifier 6, and the speaker 7 through the solar power supply assembly 10.

[0027] Preferably, a wireless transmitter 11 is provided to transmit the audio electrical signal conducted by the pickup 4 obtained by the sound receiver and amplifier through the wireless transmitter 11, so that the remote management platform can receive and perform identification processing, and determine the position of the foundation pit support structure and soil instability, so as to perform targeted processing subsequently.

[0028] Preferably, the sound receiver and amplifier 6 is provided with a control device. After the control device receives the sound electrical signal of the foundation pit support structure and soil instability from the pickup 4, it can directly output a voice alarm electrical signal to the speaker 7, or compare it with the pre-stored sound electrical signal of the foundation pit support structure and soil instability. After confirming that it is the sound of the foundation pit support structure and soil instability to avoid false alarms, then output a voice alarm electrical signal to the speaker 7 to warn the construction personnel to flee the dangerous area in time.

[0029] As Figure 2 、 3 shown, the method for using the monitoring and warning device for the foundation pit support structure and soil instability in the first embodiment of the present invention is realized as follows, including: S1: During the construction of the foundation pit support or slope support, according to the geological conditions and the foundation pit support or slope support plan, select a suitable position behind the water-stop curtain H, drive the vertical pipe 3 of the first monitoring and warning device A for the foundation pit support structure and soil instability into the soil B (the monitored object 1) to be detected (the monitored object 1), pour the sound-conducting liquid 2 into the vertical pipe 3, place the pickup 4, and then use the sound-insulating cover 5 to seal the top of the vertical pipe 3 for protection. Start to set the foundation pit monitoring device including the sound receiver and amplifier 6 and the speaker 7 at the water-stop curtain H near the corresponding vertical pipe 3 through the frame 8 and put it into use; When the soil B (the monitored object 1) is unstable and slides along the sliding surface 12, it will make corresponding sounds. The sounds are transmitted through the vertical pipe 3 and the sound-conducting liquid 2 in the vertical pipe 3 to the pickup 4. After the pickup 4 receives the sound, it is converted into an audio electrical signal and transmitted to the sound receiver and amplifier 6. The audio electrical signal amplified by the amplifier is transmitted to the speaker 7 and broadcast by the speaker 7 to warn the nearby construction personnel to flee the construction site in time; The sound receiver and amplifier 6 provided with a control device is adopted. After the control device receives the sound electrical signal of the foundation pit support structure and soil instability from the pickup, it outputs a clear voice alarm electrical signal that is easy for construction personnel to identify to the speaker 7, so that the construction personnel can identify it in time and make actions to avoid danger.

[0030] As Figure 2As shown in the figure, during the construction of slope-supporting, the earthwork project excavates the first layer and the second layer in sequence. After each layer is excavated and the slope-supporting is completed, the vertical pipe 3 of the second foundation pit supporting structure and the soil instability monitoring and warning device A is driven on the soil slope D. The foundation pit monitoring device G including the sound receiver and amplifier 6 and the loudspeaker 7 is set at the slope-supporting E at the corresponding vertical pipe 3 through the frame 8 and put into use.

[0031] As Figure 3 shown in the figure, during the construction of foundation pit supporting, while the foundation pit supporting C is completed, the third foundation pit supporting structure and the soil instability monitoring and warning device A are set on the foundation pit supporting C. If multiple layers of horizontal support beams F need to be set for the foundation pit supporting C, according to the foundation pit supporting plan, the fourth foundation pit supporting structure and the vertical pipe 3 of the soil instability monitoring and warning device A are set at suitable positions on each layer of horizontal support beam F. Before the horizontal support beam F is put into use, the above-mentioned foundation pit monitoring device is started to be set at the corresponding vertical pipe 3 and put into use. ​

Claims

1. A foundation pit support structure and soil instability monitoring and early warning device, characterized in that: It includes a vertical tube that can hold sound-transmitting liquid and whose outer wall is in close contact with the monitored object, a microphone placed inside the vertical tube, a sound insulation cover arranged on the top of the vertical tube, a sound receiver and amplifier, and a loudspeaker. The electrical signal output end of the microphone is connected to the electrical signal input end of the sound receiver and amplifier, the electrical signal output end of the sound receiver and amplifier is connected to the electrical signal input end of the loudspeaker, and the sound insulation cover is arranged on the upper end of the vertical tube.

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

3. The foundation pit support structure and soil instability monitoring and early warning device according to claim 2 is characterized in that: The pickup is waterproof.

4. The foundation pit support structure and soil instability monitoring and early warning device according to claim 1, 2 or 3, characterized in that: A recorder is provided, and the audio signal acquired by the microphone is conducted to and recorded by the recorder.

5. The foundation pit support structure and soil instability monitoring and early warning device according to claim 4 is characterized in that: A solar power source component including a storage battery component is provided so as to provide electric power to a pickup, a recorder, a sound receiver and amplifier and a loudspeaker through the solar power source component.

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

7. The foundation pit support structure and soil instability monitoring and early warning device according to claim 6 is characterized in that: A wireless transmitter is provided, through which the audio electrical signal conducted by the microphone and acquired by the sound receiver and amplifier is transmitted, so that the remote management platform can receive and identify the signal.

8. The method for using the foundation pit support structure and the soil instability monitoring and early warning device according to claims 1 to 7 is characterized in that: include: S1: During the foundation pit support construction, according to the geological conditions and the foundation pit support plan, a suitable location is selected, and the vertical pipes of the first foundation pit support structure and the soil instability monitoring and early warning device are driven into the soil to be detected, and the tops of the vertical pipes are sealed with sound insulation covers for protection; If the foundation pit support needs to set up support piles, according to the foundation pit support plan, select a suitable location to set up the first foundation pit support structure and the vertical pipe of the soil instability monitoring and early warning device in the support piles, pour the sound transmission liquid, place the pickup, and then use the sound insulation cover to close the top for protection; When the foundation pit supporting structure and soil become unstable, a corresponding sound will be emitted. The sound is transmitted to the microphone through the vertical pipe and the sound-transmitting liquid in the vertical pipe. After the microphone receives the sound, it is converted into an audio signal and transmitted to the sound receiver and amplifier. The audio signal amplified by the amplifier is transmitted to the loudspeaker and broadcast by the loudspeaker to warn nearby construction workers to flee the construction site in time. A sound receiver and amplifier equipped with a control device is used. After receiving the sound signal of the foundation pit supporting structure and soil instability from the microphone, the control device outputs a clear alarm signal that is easy for construction workers to identify to the loudspeaker, so that the construction workers can identify it in time and take actions to avoid danger.

9. The method for using the foundation pit support structure and the soil instability monitoring and early warning device according to claim 8 is characterized in that: During the construction of foundation pit support or slope support, according to the geology and foundation pit support or slope support scheme, a suitable position behind the water-stop curtain is selected, and the vertical pipes of the first foundation pit support structure and the soil instability monitoring and early warning device are driven into the soil to be detected, and sound transmission liquid is poured into the vertical pipes. After the microphone is placed, the top of the vertical pipe is sealed with a sound insulation cover for protection, and the foundation pit monitoring device including the sound receiving and amplifier and the loudspeaker is set at the water-stop curtain near the corresponding vertical pipe through the rack and put into use; During the slope support construction, the earthwork project excavates the first layer and the second layer in sequence. After each layer is excavated and the slope support is completed, a vertical pipe of the second foundation pit support structure and the soil instability monitoring and early warning device is set on the earth slope, and the foundation pit monitoring device including the sound receiving and amplifier and the loudspeaker is set at the slope support at the corresponding vertical pipe through the frame and put into use; During the foundation pit support construction, while the foundation pit support is completed, the third foundation pit support structure and the soil instability monitoring and early warning device are set on the foundation pit support. If the foundation pit support needs to set up multiple layers of horizontal support beams, according to the foundation pit support plan, select a suitable position on each layer of horizontal support beams to set the fourth foundation pit support structure and the vertical pipe 3 of the soil instability monitoring and early warning device. Before the horizontal support beams are put into use, start to set the foundation pit monitoring device at the corresponding vertical pipe and put it into use.

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