An automatic monitoring method and device for the horizontal displacement of a foundation pit retaining structure

Abstract

The present invention discloses an automatic monitoring method and device for the horizontal displacement of a foundation pit retaining structure, which includes: drawing the entire center line of the capping beam above the capping beam at the top of the foundation pit retaining structure; installing an infrared receiver and an infrared transmitter at both ends of the center line of the capping beam respectively; making the red light beam emitted by the infrared transmitter lie in the same vertical plane as the center line of the capping beam; installing an inclined scale on the capping beam and perpendicular to the center line of the capping beam, with the tip end of the scale fitting on the center line of the capping beam and pointing to the foundation pit side; setting the vertical height when the inclined scale changes from inclined to horizontal to be greater than or equal to H, and setting the horizontal length when the inclined scale changes from inclined to horizontal to be greater than or equal to L; H = tanθ * L, where H is the distance between the red light beam and the center line of the capping beam, L is the maximum horizontal deformation size of the foundation pit retaining structure, and θ is the inclination angle of the inclined scale. The present invention can monitor the horizontal deformation state of the foundation pit retaining structure in real time, with high efficiency and low labor and equipment costs.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit engineering, and particularly to an automatic monitoring device for the horizontal displacement of a foundation pit retaining structure. Background Art

[0002] For the horizontal displacement monitoring of the foundation pit retaining structure, the total station is used to measure the coordinates of the observation points of the foundation pit retaining structure once or twice a day, calculate the overall horizontal displacement of the observation points, and then allocate it to each day to obtain the daily displacement. However, it is very troublesome to measure with the total station every day, and the workload is relatively large. A group of professional surveyors are required to monitor the foundation pit retaining structure every day, and the professional technical level requirements for professional surveyors are also relatively high; when the displacement of the retaining structure exceeds the specification alarm value, the superior department and the construction unit are only informed that the foundation pit retaining structure exceeds the specification allowable value and reaches the alarm value. At this time, the construction unit needs to take measures to ensure the safety of the retaining structure. The prediction has hysteresis and cannot monitor the deformation of the foundation pit structure in a timely manner. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic monitoring method and device for the horizontal displacement of a foundation pit retaining structure, which can monitor the horizontal deformation state of the foundation pit retaining structure in real time, with high efficiency, low labor and equipment costs.

[0004] To solve the above technical problem, the first aspect of the present invention provides an automatic monitoring device for the horizontal displacement of a foundation pit retaining structure, which includes the following steps:

[0005] Step 1: Draw the center line of the entire capping beam above the capping beam at the top of the foundation pit retaining structure that has been constructed.

[0006] Step 2: Install an infrared receiver at the center line part of one end of the capping beam; install an infrared transmitter at the other end of the capping beam.

[0007] Step 3: According to the red light beam emitted by the infrared transmitter, adjust the position of the infrared transmitter so that the red light beam coincides with the center line of the capping beam vertically and horizontally, and keep the emitted red light beam and the center line of the capping beam in the same vertical plane.

[0008] Step 4: Install an oblique scale on the capping beam. The oblique scale is perpendicular to the center line of the capping beam, and the tip end of the oblique scale fits on the center line of the capping beam and points to the foundation pit side.

[0009] Step 5: According to the requirements of the design drawings, obtain the maximum horizontal deformation dimension L of the foundation pit retaining structure. Adjust the distance between the infrared beam and the center line of the capping beam to H. At the same time, set the vertical height from the inclined state to the horizontal state of the bevel scale to be greater than or equal to H, and set the horizontal length from the inclined state to the horizontal state of the bevel scale to be greater than or equal to L. Wherein, H = tanθ * L, and θ is the inclination angle of the bevel scale.

[0010] Step 6: After the installation and commissioning are completed, the monitoring of the foundation pit retaining structure can be carried out.

[0011] As an optimized scheme of the above-mentioned automatic monitoring method for the horizontal displacement of the foundation pit retaining structure, it further includes an alarm step: when the deformation amount of the foundation pit retaining structure is greater than or equal to the maximum horizontal deformation dimension of the foundation pit retaining structure, the red light beam emitted by the infrared transmitter is blocked by the bevel scale and cannot reach the infrared receiver. At this time, the sound and light alarm built in the infrared receiver is triggered to give an alarm.

[0012] As an optimized scheme of the above-mentioned automatic monitoring method for the horizontal displacement of the foundation pit retaining structure, the bevel scale is set at the central position of the center line of the capping beam.

[0013] The second aspect of the present invention provides an automatic monitoring device for the horizontal displacement of a foundation pit retaining structure, which includes an infrared receiver, an infrared transmitter, and a bevel scale. The infrared receiver and the infrared transmitter are respectively installed at both ends of the center line of the capping beam at the top of the foundation pit retaining structure. The red light beam emitted by the infrared transmitter and the center line of the capping beam are located in the same vertical plane. The bevel scale is installed on the capping beam. The bevel scale is perpendicular to the center line of the capping beam. The tip end of the bevel scale is attached to the center line of the capping beam and points to the foundation pit side. The vertical height from the inclined state to the horizontal state of the bevel scale is set to be greater than or equal to H, and the horizontal length from the inclined state to the horizontal state of the bevel scale is set to be greater than or equal to L. Wherein, H = tanθ * L, H is the distance between the red light beam emitted by the infrared transmitter and the center line of the capping beam, L is the maximum horizontal deformation dimension of the foundation pit retaining structure, and θ is the inclination angle of the bevel scale.

[0014] As an optimized scheme of the above-mentioned automatic monitoring device for the horizontal displacement of the foundation pit retaining structure, it further includes a sound and light alarm, and the sound and light alarm is electrically connected to the infrared receiver.

[0015] As an optimized scheme of the above-mentioned automatic monitoring device for the horizontal displacement of the foundation pit retaining structure, the bevel scale is set at the central position of the center line of the capping beam.

[0016] Implementing an automatic monitoring method and device for the horizontal displacement of a foundation pit retaining structure of the present invention, compared with the prior art, its beneficial effects are as follows:

[0017] 1. It saves manpower and material resources. There is no need for a professional survey team to monitor daily. Ordinary personnel can obtain the horizontal deformation monitoring results of the foundation pit at any time according to the relative position between the red light beam and the bevel scale, greatly reducing the labor intensity of the monitoring personnel and having low labor and equipment costs.

[0018] 2. Since the deformation data can be directly read on the bevel scale, the deformation data is more intuitive and accurate, changing the phenomenon that after traditional monitoring by measuring instruments, complex calculations are carried out before accurate displacement data can be obtained.

[0019] 3. Due to the cooperation of the red light beam, it can monitor the horizontal state of the foundation pit retaining structure in real time and dynamically, breaking the dilemma that the horizontal displacement of the retaining structure cannot be obtained without measurement by surveying personnel, changing the fixed monitoring to real-time dynamic monitoring. The monitoring data can be timely fed back to the construction unit to adjust the stress state of the retaining structure in time, greatly improving the safety of foundation pit construction and ensuring the personal safety of the operating personnel in the foundation pit.

[0020] 4. When the horizontal displacement of the foundation pit retaining structure reaches the maximum value specified in the design drawing, the sound and light alarm automatically sounds an alarm to remind the operating personnel and construction equipment in the foundation pit to evacuate in time, greatly improving the monitoring efficiency. It can monitor 24 hours a day, is not affected by weather and climate, and this technology can be widely applied to projects with foundation pits in civil engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an isometric view of an automatic monitoring device for the horizontal displacement of a foundation pit retaining structure provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram when the center line of the capping beam, the red light beam and the bevel scale are in the initial state;

[0023] Figure 3 is a schematic diagram when the center line of the capping beam, the red light beam and the bevel scale are in the state of the maximum horizontal deformation of the foundation pit retaining structure; the figure shows that the red light beam is blocked by the bevel scale.

[0024] In the figure, the markings are as follows: 1. Capping beam, 11. Center line; 2. Infrared receiver; 3. Infrared transmitter, 31. Red light beam; 4. Bevel scale, 41. Tip end; H is the distance between the red light beam emitted by the infrared transmitter and the center line of the capping beam; L is the maximum horizontal deformation size of the foundation pit retaining structure, and θ is the inclination angle of the bevel scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the present invention are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] As Figures 1 to 3 shown, a preferred embodiment of the present invention.

[0028] An automatic monitoring method for the horizontal displacement of a foundation pit retaining structure, which includes the following steps:

[0029] Step 1: Draw the center line 11 of the entire capping beam 1 above the capping beam 1 at the top of the already constructed foundation pit retaining structure.

[0030] Step 2: Install an infrared receiver 2 at the center line 11 part at one end of the capping beam 1; install an infrared transmitter 3 at the other end of the capping beam 1.

[0031] Step 3: According to the red light beam 31 emitted by the infrared transmitter 3, adjust the position of the infrared transmitter 3 so that the red light beam 31 coincides with the center line 11 of the capping beam 1 vertically, and keep the emitted red light beam 31 and the center line 11 of the capping beam 1 in the same vertical plane.

[0032] Step 4: Install the bevel scale 4 on the capping beam 1. The bevel scale 4 is perpendicular to the center line 11 of the capping beam 1. The tip end 41 of the bevel scale 4 is attached to the center line 11 of the capping beam 1 and points to the foundation pit side.

[0033] Step 5: According to the requirements of the design drawings, obtain the maximum horizontal deformation size L of the foundation pit retaining structure. Adjust the distance between the infrared beam and the center line 11 of the capping beam 1 to H. At the same time, set the vertical height when the bevel scale 4 changes from inclined to horizontal to be greater than or equal to H, and set the horizontal length when the bevel scale 4 changes from inclined to horizontal to be greater than or equal to L. Wherein, H = tanθ * L, and θ is the inclination angle of the bevel scale 4.

[0034] Step 6: After the installation and debugging are completed, the monitoring of the foundation pit retaining structure can be carried out.

[0035] Exemplarily, the above-mentioned automatic monitoring method for the horizontal displacement of the foundation pit retaining structure further includes an alarm step: when the deformation amount of the foundation pit retaining structure is greater than or equal to the maximum horizontal deformation size of the foundation pit retaining structure, the red light beam 31 emitted by the infrared emitter 3 is blocked by the bevel scale 4 and cannot reach the infrared receiver 2. At this time, the sound and light alarm carried by the infrared receiver 2 is triggered to give an alarm (not indicated in the figure).

[0036] Exemplarily, to ensure the accuracy of the data for monitoring the horizontal displacement and deformation of the foundation pit retaining structure, the bevel scale 4 is arranged at the central position of the center line 11 of the capping beam 1.

[0037] As Figures 1 to 3 shown, based on the above-mentioned automatic monitoring method for the horizontal displacement of the foundation pit retaining structure, the present invention further provides an automatic monitoring device for the horizontal displacement of the foundation pit retaining structure, which includes an infrared receiver 2, an infrared emitter 3 and a bevel scale 4. The infrared receiver 2 and the infrared emitter 3 are respectively installed at both ends of the center line 11 of the capping beam at the top of the foundation pit retaining structure. The red light beam 31 emitted by the infrared emitter 3 and the center line 11 of the capping beam 1 are located in the same vertical plane. The bevel scale 4 is installed on the capping beam 1. The bevel scale 4 is perpendicular to the center line 11 of the capping beam 1. The tip end 41 of the bevel scale 4 is attached to the center line 11 of the capping beam 1 and points to the foundation pit side. The vertical height at which the bevel scale 4 changes from inclined to horizontal is set to be greater than or equal to H, and the horizontal length at which the bevel scale 4 changes from inclined to horizontal is set to be greater than or equal to L. Wherein, H = tanθ * L, H is the distance between the red light beam 31 emitted by the infrared emitter 3 and the center line 11 of the capping beam 1, L is the maximum horizontal deformation size of the foundation pit retaining structure, and θ is the inclination angle of the bevel scale 4.

[0038] Exemplarily, the automatic monitoring device for the horizontal displacement of the foundation pit retaining structure further includes a sound and light alarm (not indicated in the figure), and the sound and light alarm is electrically connected to the infrared receiver 2.

[0039] Exemplarily, to ensure the accuracy of the data for monitoring the horizontal displacement and deformation of the foundation pit retaining structure, the bevel scale 4 is arranged at the central position of the center line 11 of the capping beam 1.

[0040] In summary, according to the automatic monitoring method and device for the horizontal displacement of the foundation pit retaining structure according to the embodiments of the present invention, the horizontal deformation monitoring result of the foundation pit can be obtained at any time according to the relative position of the red light beam 31 and the bevel scale 4. Ordinary personnel can carry out the monitoring without the need for a professional survey team, greatly reducing the labor intensity of the monitoring personnel, saving manpower and material resources, and having low labor and equipment costs. Since the deformation data can be directly read on the bevel scale 4, the deformation data is more intuitive and accurate, changing the phenomenon that after traditional monitoring by measuring instruments, complex calculations are carried out before accurate displacement data can be obtained. Due to the cooperation of the red light beam 31, the horizontal state of the foundation pit retaining structure can be monitored in real time and dynamically, breaking the traditional dilemma that the horizontal displacement of the retaining structure cannot be obtained without the measurement of surveyors, changing the fixed monitoring to real-time dynamic monitoring, and the monitoring data can be timely fed back to the construction unit so as to timely adjust the stress state of the retaining structure, greatly improving the safety of foundation pit construction and ensuring the personal safety of the operators in the foundation pit. When the horizontal displacement of the foundation pit retaining structure reaches the maximum value specified in the design drawing, the sound and light alarm automatically sounds an alarm to remind the operators and construction equipment in the foundation pit to evacuate in time, greatly improving the monitoring efficiency. It can be monitored 24 hours a day, unaffected by weather and climate, and this technology can be widely applied to projects with foundation pits in civil engineering.

[0041] In the description of the present invention, it should be understood that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An automatic monitoring method for the horizontal displacement of a foundation pit retaining structure, characterized in that, The steps include: Step 1: Draw the center line of the entire crown beam above the crown beam at the top of the completed foundation pit retaining structure; Step 2, install an infrared receiver at the center line of one end of the crown beam; install an infrared transmitter at the other end of the crown beam; Step 3, according to the red light beam emitted by the infrared emitter, adjust the position of the infrared emitter so that the red light beam and the center line of the crown beam overlap each other vertically, and keep the emitted red light beam and the center line of the crown beam in the same vertical plane; Step 4: Install the bevel ruler on the crown beam, with the bevel ruler perpendicular to the center line of the crown beam, and the tip of the bevel ruler fits on the center line of the crown beam and points to one side of the foundation pit; Step 5: According to the requirements of the design drawings, the maximum horizontal deformation dimension L of the foundation pit retaining structure is obtained, and the distance between the infrared beam and the center line of the crown beam is adjusted to H. At the same time, the vertical height of the bevel scale from tilted to horizontal is set to be greater than or equal to H, and the horizontal length of the bevel scale from tilted to horizontal is set to be greater than or equal to L; wherein H = tanθ*L, θ is the inclination angle of the bevel scale; Step 6: After installation and debugging are completed, the foundation pit retaining structure monitoring can be carried out.

2. The automatic monitoring method for the horizontal displacement of the foundation pit retaining structure according to claim 1, characterized in that It also includes an alarm step: when the deformation of the foundation pit retaining structure is greater than or equal to the maximum horizontal deformation size of the foundation pit retaining structure, the red light beam emitted by the infrared transmitter is blocked by the bevel scale and cannot reach the infrared receiver. At this time, the sound and light alarm of the infrared receiver triggers an alarm.

3. The automatic monitoring method for the horizontal displacement of the foundation pit retaining structure according to claim 1 or 2, characterized in that, The bevel scale is arranged at the center position of the center line of the crown beam.

4. An automatic monitoring device for the horizontal displacement of a foundation pit retaining structure, characterized in that, It comprises an infrared receiver, an infrared transmitter and an angle scale, wherein the infrared receiver and the infrared transmitter are respectively installed at two ends of the center line of the crown beam at the top of the foundation pit retaining structure, and the red light beam emitted by the infrared transmitter is located on the same vertical plane as the center line of the crown beam; the angle scale is installed on the crown beam, the angle scale is perpendicular to the center line of the crown beam, the tip of the angle scale fits on the center line of the crown beam and points to one side of the foundation pit, the vertical height of the angle scale from tilt to horizontal is set to be greater than or equal to H, and the horizontal length of the angle scale from tilt to horizontal is set to be greater than or equal to L, wherein H=tanθ*L, H is the distance between the red light beam emitted by the infrared transmitter and the center line of the crown beam, L is the maximum horizontal deformation size of the foundation pit retaining structure, and θ is the tilt angle of the angle scale.

5. The automatic monitoring device for the horizontal displacement of the foundation pit retaining structure according to claim 4, wherein, It also includes an audible and visual alarm, which is electrically connected to the infrared receiver.

6. The automatic monitoring device for the horizontal displacement of the foundation pit retaining structure according to claim 4 or 5, characterized in that The bevel scale is arranged at the center position of the center line of the crown beam.

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