Method and system for correcting monitoring result after deflection of inclinometer in foundation pit monitoring

Abstract

The invention discloses a method and a system for correcting a monitoring result after deflection of an inclinometer pipe in foundation pit monitoring, and the method comprises the steps: projecting X / Y axial displacement deformation of different depths in an inclinometer pipe hole and a guide groove azimuth angle alpha i of different depths in the inclinometer pipe hole relative to a direction vertical to a foundation pit to the direction vertical to the foundation pit; and displacement deformation correction values of different depths in the inclinometer pipe hole are obtained. The horizontal displacement variation of the inclinometer hole calculated by using the correction method provided by the invention can truly reflect actual displacement change data of each layer of an enclosure or a soil body towards one side of a foundation pit when the inclinometer pipe is twisted.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit monitoring, and in particular to a method and system for correcting monitoring results after deflection of an inclinometer tube in foundation pit monitoring. Background Art

[0002] Inclinometer technology is widely used in soil deformation monitoring, and plays a critical role in predicting and warning construction risks, especially in engineering infrastructure projects with deep foundation pits. The method is to first bury the inclinometer tube vertically in the retaining structure of the monitoring location, place the inclinometer into the inclinometer tube along the guide groove, and then measure every 500mm. The inclinometer will measure the angle between the axis of the tube and the plumb line, thereby calculating the horizontal displacement and inclination curve of each measuring point in the inclinometer tube, and finally achieve the purpose of monitoring soil deformation.

[0003] In the horizontal displacement monitoring of deep foundation pits, the buried quality of the inclinometer tube has a certain impact on the accuracy of the monitoring data, especially when the inclinometer tube is twisted, that is, the guide groove of the inclinometer tube deviates from the vertical direction of the foundation pit, which will cause the inclinometer data to deviate from the actual deformation. However, the torsion phenomenon of the inclinometer tube is common in actual engineering. Considering the cost factor, PVC pipes are more commonly used in deformation monitoring, but their deformation stability is poor; at the same time, it is not easy to align the guide groove when the segmented lower pipe is connected to the required length at the orifice; the inclinometer tube is tied to the steel cage and the circular steel cage is hoisted and lowered. The factors such as the angle deflection make the inclinometer tube buried in the foundation pit retaining structure prone to torsion. The deeper the inclinometer tube is buried, the more significant the distortion and non-vertical problems of the inclinometer tube during construction will be.

[0004] In engineering construction, the inclinometer pipe guide groove is not completely perpendicular to the foundation pit direction, which will lead to inaccurate inclinometer monitoring data, seriously threatening the reliability and safety of foundation pit deformation monitoring. Since it is impossible to make the inclinometer pipe not twisted and completely perpendicular to the foundation pit from the construction process of the inclinometer pipe, it is urgent to solve the problem of measurement data deviation caused by the twisting and deformation of the inclinometer pipe. Summary of the invention

[0005] The present application provides a method and system for correcting monitoring results after the deflection of the inclinometer tube in foundation pit monitoring, so as to solve the problem that the measurement data is biased due to the twisting deformation of the inclinometer tube, and the measurement results are difficult to truly reflect the deformation of the foundation pit retaining structure.

[0006] According to the first aspect, an embodiment provides a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring, the method comprising:

[0007] When the inclinometer tube is buried and stable, measure the azimuth angle α1 of the inclinometer tube hole guide groove relative to the vertical foundation pit direction;

[0008] The torsion meter is used to measure the torsion angle θ of the guide groove relative to the inclinometer borehole at different depths in the inclinometer borehole. i ;

[0009] Based on the measured guide groove torsion angle θ i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i ;

[0010] The inclinometer is used to measure the X / Y axial guide groove of the inclinometer tube in the forward and reverse directions, and the X / Y axial displacement deformation at different depths in the inclinometer tube hole is obtained according to the measurement data;

[0011] Based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i By projecting it to the vertical direction of the foundation pit, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained.

[0012] Furthermore, after the inclinometer tube is buried and stabilized, the azimuth angle α1 of the inclinometer tube hole guide groove relative to the vertical foundation pit direction is measured, specifically including:

[0013] When burying the inclinometer pipe, tie it to the steel cage with wire and lower it into the hole of the retaining pile.

[0014] The inclinometer tube should be buried on the side away from the foundation pit, that is, the soil side, to truly reflect the deformation of the retaining structure.

[0015] Furthermore, the torsion meter is used to measure the torsion angle θ of the guide groove at different depths in the inclinometer casing relative to the inclinometer casing orifice. i , including:

[0016] According to the preset measurement interval, the guide groove in the inclinometer borehole is measured from top to bottom using a torque meter, and the azimuth change measured at each measuring point is accumulated point by point to obtain the guide groove torsion angle θ of the corresponding depth of each measuring point in the entire inclinometer borehole relative to the inclinometer borehole. i .

[0017] Further, based on the measured guide groove torsion angle θ i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i , including:

[0018] α i =α1+θ i .

[0019] Furthermore, the inclinometer is used to perform forward and reverse measurements on the X / Y direction guide groove of the inclinometer tube, and the X / Y axial displacement deformation at different depths in the inclinometer tube hole is obtained according to the measurement data, specifically including:

[0020] In the cross-shaped guide groove structure of the inclinometer pipe mouth, the guide groove on one side close to the foundation pit and the guide groove opposite to it are in the X-axis direction, and the other pair of guide grooves are in the Y-axis direction, and the displacement of the guide grooves in the X and Y axes toward the foundation pit side is positive;

[0021] The high guide wheel of the inclinometer rod probe is the positive direction of the inclinometer, and the low guide wheel of the rod probe is the negative direction of the inclinometer.

[0022] Furthermore, the inclinometer is used to perform forward and reverse measurements on the X / Y direction guide groove of the inclinometer tube, and the X / Y axial displacement deformation at different depths in the inclinometer tube hole is obtained according to the measurement data, specifically including:

[0023] Select the X / Y axis guide groove, point the high guide wheel side of the measuring rod toward the foundation pit, put it into the inclinometer tube along the selected guide groove, manually control the inclinometer to be lowered to the measuring reference point at the bottom of the tube and let it stand, then pull the cable upward to make the probe move uniformly from the bottom to the top of the inclinometer tube, pause at preset distances and measure the inclination until the probe reaches the tube mouth, take out the measuring rod, obtain the inclination data of the forward measurement and convert it into displacement;

[0024] Then rotate the measuring rod of the inclinometer 180°, so that the lower guide wheel side of the measuring rod faces the foundation pit, and put it into the inclinometer tube along the selected guide groove. Similarly, measure the inclination data of the negative measurement and convert it into displacement;

[0025] Divide (the displacement measured in the positive direction - the displacement measured in the negative direction) by 2 to obtain the X / Y axial displacement at different depths in the inclinometer borehole measured in one measurement;

[0026] During the initial measurement, the average value is obtained by repeated measurements as the initial value of the X / Y axial displacement at different depths in the inclinometer borehole, and then the X / Y axial displacement at different depths in the inclinometer borehole obtained by subsequent measurements is subtracted from the initial value to obtain the X / Y axial displacement deformation at different depths in the inclinometer borehole.

[0027] Furthermore, based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i , by projecting to the vertical foundation pit direction, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained, including:

[0028] S i =L X ·Cosα i +L Y ·Sinα i

[0029] Among them, S i is the displacement deformation correction value, L XTo measure the X-axis displacement deformation at different depths in the inclined borehole, L Y is the X-axis displacement deformation at different depths in the incline borehole, α i The set value range is 0°~90°.

[0030] According to the second aspect, an embodiment provides a monitoring result correction system after the inclinometer tube is deflected in foundation pit monitoring, the system comprising:

[0031] The hole opening azimuth angle measurement module is used to measure the azimuth angle α1 of the hole opening guide groove of the inclinometer pipe relative to the vertical foundation pit direction after the inclinometer pipe is buried and stabilized;

[0032] The torsion angle measurement module is used to measure the torsion angle θ of the guide groove at different depths in the inclinometer borehole relative to the inclinometer borehole using a torsion meter. i ;

[0033] The guide groove azimuth angle acquisition module is used to obtain the guide groove torsion angle θ based on the measured guide groove torsion angle θ. i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i ;

[0034] Inclinometer module, used to measure the X / Y axial guide groove of the inclinometer tube in the forward and reverse directions by using the inclinometer, and obtain the X / Y axial displacement deformation at different depths in the inclinometer tube hole according to the measurement data;

[0035] Displacement correction module, used to measure the X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth α i By projecting it to the vertical direction of the foundation pit, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained.

[0036] Furthermore, the torsion angle measurement module is specifically used for:

[0037] According to the preset measurement interval, the guide groove in the inclinometer borehole is measured from top to bottom using a torque meter, and the azimuth change measured at each measuring point is accumulated point by point to obtain the guide groove torsion angle θ of the corresponding depth of each measuring point in the entire inclinometer borehole relative to the inclinometer borehole. i .

[0038] Furthermore, the displacement correction module is specifically used to:

[0039] Based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i , by projecting to the vertical foundation pit direction, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained, including:

[0040] S i =LX ·Cosα i +L Y ·Sinα i

[0041] Among them, S i is the displacement deformation correction value, L X To measure the X-axis displacement deformation at different depths in the inclined borehole, L Y is the X-axis displacement deformation at different depths in the incline borehole, α i The set value range is 0°~90°.

[0042] The present application provides a method and system for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring. The horizontal displacement change of the inclinometer hole calculated by the correction method proposed in the present invention can truly reflect the actual displacement change data of each layer of the retaining or soil body to one side of the foundation pit when the inclinometer tube is twisted. Compared with the traditional method of measuring the deformation of the inclinometer tube with a single slot, it has significant progress, is more conducive to judging the change trend of the foundation pit, and reduces the adverse effects caused by the excessive torsion of the inclinometer tube guide groove, so as to correctly guide the on-site construction to ensure the safety and controllability of the foundation pit retaining structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A flow chart of a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0044] Figure 2 A schematic diagram of tying and lowering an inclinometer tube in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0045] Figure 3 A schematic diagram of burying an inclinometer tube in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0046] Figure 4 A schematic diagram of the azimuth angle of an inclinometer tube in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0047] Figure 5 A schematic diagram of the composition of a portable inclinometer in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0048] Figure 6 A schematic diagram of a guide wheel of an inclinometer rod probe in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0049] Figure 7A schematic diagram of the measurement principle of an inclinometer in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0050] Figure 8 A schematic diagram of data correction of the angle of the inclinometer tube direction in a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring provided by one embodiment of the present invention;

[0051] Fig. 9 A schematic diagram of the structure of a monitoring result correction system after deflection of an inclinometer tube in foundation pit monitoring provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0053] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0054] The first embodiment of the present invention provides a method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring. Figure 1 Provide detailed explanation.

[0055] like Figure 1 As shown, in step S100, after the inclinometer tube is buried and stabilized, the azimuth angle α1 of the guide groove of the inclinometer tube hole relative to the vertical foundation pit direction is measured.

[0056] The above steps specifically include:

[0057] S110, such as Figure 2As shown, use wire to tie the inclinometer tube to the steel cage and lower them into the retaining pile hole. When tying, make sure that one direction of the cross groove is parallel to the connecting line of the steel cage diameter at the tying location. Figure 3 As shown, the inclinometer tube should be buried on the side away from the foundation pit, that is, the soil side, to truly reflect the deformation of the retaining structure.

[0058] S120, when the inclinometer tube is buried and stable, measure the angle of the inclinometer tube hole guide groove relative to the vertical direction of the foundation pit, which is defined as the azimuth angle α1, such as Figure 4 shown.

[0059] like Figure 1 As shown, in step S200, the torsion angle θ of the guide groove at different depths in the inclinometer casing relative to the orifice of the inclinometer casing is measured by using a torsion meter. i .

[0060] The above steps specifically include:

[0061] S210, detect the torsion angle of the inclinometer pipe. Using the CN type torsion measuring instrument developed by the Institute of Instrumentation and Research of the Chinese Academy of Water Resources, the azimuth of the inclinometer pipe guide groove in the hole is measured from top to bottom, with a measurement interval of 0.5m, and the azimuth change measured at each measuring point is accumulated point by point, so that the torsion angle θ of the guide groove at the corresponding depth of each measuring point in the whole hole relative to the pipe mouth can be obtained. i .

[0062] like Figure 1 As shown, in step S300, based on the measured guide groove torsion angle θ i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i .

[0063] The above steps specifically include:

[0064] S310, adding the guide groove torsion angle of each depth to the hole opening azimuth, and obtaining the guide groove azimuth α of each measuring point relative to the vertical foundation pit side wall direction i , the formula is as follows. For details on the relationship between the angles, see Figure 4 .

[0065] α i =α1+θ i .

[0066] like Figure 1 As shown, in step S400, the inclinometer is used to perform forward and reverse measurements on the X / Y axial guide groove of the inclinometer casing, and the X / Y axial displacement deformation at different depths in the inclinometer casing hole is obtained according to the measurement data.

[0067] The above steps specifically include:

[0068] S410, such as Figure 3 As shown in the figure, the cross-shaped guide groove structure of the inclinometer tube includes four guide grooves in total. The guide groove on one side close to the foundation pit and the guide groove opposite to it are defined as the X-axis direction, and the other pair of guide grooves are defined as the Y-axis direction. The displacement of the guide grooves on the X-axis and Y-axis toward the foundation pit side is positive, as shown in the figure. Figure 4 As shown. Figure 5 As shown in the figure, the inclinometer consists of a control reel, a control cable, and a measuring rod probe. Figure 6 It is a schematic diagram of the composition of the measuring rod probe, in which the high-position guide wheel of the measuring rod probe of the inclinometer is the positive direction of the inclinometer, and the low-position guide wheel of the measuring rod probe is the negative direction of the inclinometer.

[0069] S420, first select the X-axis guide groove, place the measuring rod with the high guide wheel side facing the foundation pit, and place it into the inclinometer tube along the X-axis guide groove.

[0070] S430, manually control the inclinometer to be lowered to the measuring reference point at the bottom of the pipe. Lower it slowly and let it stand at the bottom of the inclinometer pipe for 10 minutes to make the inclinometer and the internal temperature of the inclinometer pipe the same.

[0071] S440, pull the cable upward, the probe moves from the bottom to the top of the inclinometer tube, and the probe is lifted at a constant speed. According to the scale on the probe cable, it stops every 500mm and measures the inclination until the probe reaches the tube mouth, removes the measuring rod, and obtains the forward measurement data. The inclination of the probe is measured by the servo accelerometer, and the inclination can be converted into lateral displacement.

[0072] S450, rotate the inclinometer (measuring rod) 180 degrees, make the low-position guide wheel of the inclinometer measuring rod face the foundation pit, put it into the inclinometer tube along the X-axis guide groove, repeat the operations of steps S430 to S440 to obtain reverse measurement data.

[0073] S460, recording the forward and reverse measurement data, dividing (the displacement measured in the forward direction - the displacement measured in the negative direction) by 2, and obtaining the X-axis displacement at different depths in the inclinometer casing of one measurement.

[0074] S470, select the Y-axis guide groove, repeat the operations of steps S420 to S460, and obtain the Y-axis displacement at different depths in the inclinometer casing hole measured once.

[0075] S480, repeating steps S420 to S470 is regarded as measuring the displacement value of the inclinometer casing once. During the initial measurement, the average value of the three measured values ​​is taken as the initial value of the X-axis and Y-axis displacements at different depths in the inclinometer casing.

[0076] S490, subsequently, the X-axial displacement deformation L at different depths in the inclinometer borehole is obtained by subtracting the corresponding initial values ​​from the X-axial and Y-axial displacements at different depths in the inclinometer borehole measured each time. X and Y-axis displacement deformation L YBy comparing the current and initial observation data, the change in lateral offset can be determined. The specific principle diagram is as follows: Figure 7 shown.

[0077] like Figure 1 As shown, in step S500, based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i By projecting it to the vertical direction of the foundation pit, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained.

[0078] Specifically, S510, such as Figure 8 As shown, the corrected displacement deformation should be L X Measured projection length and L Y The sum of the measured projected lengths is calculated using the following formula:

[0079] S i =L X ·Cosα i +L Y ·Sinα i

[0080] Among them, S i is the displacement deformation correction value, L X To measure the X-axis displacement deformation at different depths in the inclined borehole, L Y is the X-axis displacement deformation at different depths in the incline borehole, α i The set value range is 0°~90°.

[0081] In summary, when there is an angle in the inclinometer tube, under the condition that other acceptance indicators are good, the horizontal displacement of each depth point of the inclinometer tube can be corrected by measuring two pairs of guide grooves and using the side-angle relationship of trigonometric functions to make it return to the deformation perpendicular to the foundation pit direction, thereby reflecting the true deformation data of the foundation pit retaining structure.

[0082] Corresponding to the above-disclosed method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring, the embodiment of the present invention further discloses a system for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring, such as Fig. 9 As shown, it specifically includes:

[0083] The hole opening azimuth angle measurement module is used to measure the azimuth angle α1 of the hole opening guide groove of the inclinometer pipe relative to the vertical foundation pit direction after the inclinometer pipe is buried and stabilized;

[0084] The torsion angle measurement module is used to measure the torsion angle θ of the guide groove at different depths in the inclinometer borehole relative to the inclinometer borehole using a torsion meter. i ;

[0085] The guide groove azimuth angle acquisition module is used to obtain the guide groove torsion angle θ based on the measured guide groove torsion angle θ. i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i ;

[0086] Inclinometer module, used to measure the X / Y axial guide groove of the inclinometer tube in the forward and reverse directions by using the inclinometer, and obtain the X / Y axial displacement deformation at different depths in the inclinometer tube hole according to the measurement data;

[0087] Displacement correction module, used to measure the X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth α i By projecting it to the vertical direction of the foundation pit, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained.

[0088] Furthermore, the torsion angle measurement module is specifically used for:

[0089] According to the preset measurement interval, the guide groove in the inclinometer borehole is measured from top to bottom using a torque meter, and the azimuth change measured at each measuring point is accumulated point by point to obtain the guide groove torsion angle θ of the corresponding depth of each measuring point in the entire inclinometer borehole relative to the inclinometer borehole. i .

[0090] Furthermore, the displacement correction module is specifically used to:

[0091] Based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i , by projecting to the vertical foundation pit direction, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained, including:

[0092] S i =L X ·Cosα i +L Y ·Sinα i

[0093] Among them, S i is the displacement deformation correction value, L X To measure the X-axis displacement deformation at different depths in the inclined borehole, L Y is the X-axis displacement deformation at different depths in the incline borehole, α i The set value range is 0°~90°.

[0094] It should be noted that, for the detailed description of a monitoring result correction system after the inclinometer tube is deflected in foundation pit monitoring provided by an embodiment of the present invention, reference can be made to the relevant description of a monitoring result correction method after the inclinometer tube is deflected in foundation pit monitoring provided by an embodiment of the present application, which will not be repeated here.

[0095] Those skilled in the art will appreciate that all or part of the functions of the various methods in the above-mentioned embodiments can be implemented by hardware or by computer program. When all or part of the functions in the above-mentioned embodiments are implemented by computer program, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, disk, CD, hard disk, etc., and the program is executed by a computer to implement the above-mentioned functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above-mentioned functions can be implemented. In addition, when all or part of the functions in the above-mentioned embodiments are implemented by computer program, the program can also be stored in a storage medium such as a server, another computer, disk, CD, flash disk or mobile hard disk, and can be downloaded or copied and saved in the memory of the local device, or the system of the local device is updated, and when the program in the memory is executed by the processor, all or part of the functions in the above-mentioned embodiments can be implemented.

[0096] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not used to limit the present invention. For those skilled in the art to which the present invention belongs, some simple deductions, modifications or substitutions can be made according to the idea of ​​the present invention.

Claims

1. A method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring, characterized in that: The method comprises: When the inclinometer tube is buried and stable, measure the azimuth angle α1 of the inclinometer tube hole guide groove relative to the vertical foundation pit direction; The torsion meter is used to measure the torsion angle θ of the guide groove relative to the inclinometer borehole at different depths in the inclinometer borehole. i ; Based on the measured guide groove torsion angle θ i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i ; The inclinometer is used to measure the X / Y axial guide groove of the inclinometer tube in the forward and reverse directions, and the X / Y axial displacement deformation at different depths in the inclinometer tube hole is obtained according to the measurement data; Based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i By projecting it to the vertical direction of the foundation pit, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained.

2. The method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring according to claim 1, characterized in that: After the inclinometer tube is buried and stabilized, measure the azimuth angle α1 of the inclinometer tube hole guide groove relative to the vertical foundation pit direction, specifically including: When burying the inclinometer pipe, tie it to the steel cage with wire and lower it into the hole of the retaining pile. The inclinometer tube should be buried on the side away from the foundation pit, that is, the soil side, to truly reflect the deformation of the retaining structure.

3. The method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring according to claim 1, characterized in that: The torsion meter is used to measure the torsion angle θ of the guide groove relative to the inclinometer borehole at different depths in the inclinometer borehole. i , specifically including: According to the preset measurement interval, the guide groove in the inclinometer borehole is measured from top to bottom using a torque meter, and the azimuth change measured at each measuring point is accumulated point by point to obtain the guide groove torsion angle θ of the corresponding depth of each measuring point in the entire inclinometer borehole relative to the inclinometer borehole. i .

4. The method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring according to claim 3, characterized in that: Based on the measured guide groove torsion angle θ i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i , specifically including: a i =α1+θ i 。 5. The method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring according to claim 1, characterized in that: The inclinometer is used to measure the X / Y direction guide groove of the inclinometer tube in the forward and reverse directions. The X / Y axial displacement deformation at different depths in the inclinometer tube hole is obtained according to the measurement data, including: In the cross-shaped guide groove structure of the inclinometer pipe mouth, the guide groove on one side close to the foundation pit and the guide groove opposite to it are in the X-axis direction, and the other pair of guide grooves are in the Y-axis direction, and the displacement of the guide grooves in the X and Y axes toward the foundation pit side is positive; The high guide wheel of the inclinometer rod probe is the positive direction of the inclinometer, and the low guide wheel of the rod probe is the negative direction of the inclinometer.

6. A method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring according to claim 5, characterized in that: The inclinometer is used to measure the X / Y direction guide groove of the inclinometer tube in the forward and reverse directions. The X / Y axial displacement deformation at different depths in the inclinometer tube hole is obtained according to the measurement data, including: Select the X / Y axis guide groove, point the high guide wheel side of the measuring rod toward the foundation pit, put it into the inclinometer tube along the selected guide groove, manually control the inclinometer to be lowered to the measuring reference point at the bottom of the tube and let it stand, then pull the cable upward to make the probe move uniformly from the bottom to the top of the inclinometer tube, pause at preset distances and measure the inclination until the probe reaches the tube mouth, take out the measuring rod, obtain the inclination data of the forward measurement and convert it into displacement; Then rotate the inclinometer rod 180°, so that the lower guide wheel side of the rod faces the foundation pit, and put it into the inclinometer tube along the selected guide groove. Similarly, measure the inclination data of negative measurement and convert it into displacement; Divide (the displacement measured in the positive direction - the displacement measured in the negative direction) by 2 to obtain the X / Y axial displacement at different depths in the inclinometer borehole measured in one measurement; During the initial measurement, the average value is obtained by repeated measurements as the initial value of the X / Y axial displacement at different depths in the inclinometer borehole, and then the X / Y axial displacement at different depths in the inclinometer borehole obtained by subsequent measurements is subtracted from the initial value to obtain the X / Y axial displacement deformation at different depths in the inclinometer borehole.

7. The method for correcting monitoring results after the inclinometer tube is deflected in foundation pit monitoring according to claim 1, characterized in that: Based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i , by projecting to the vertical foundation pit direction, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained, including: S i =L X ·Cosα i +L Y ·Sinα i Among them, S i is the displacement deformation correction value, L X To measure the X-axis displacement deformation at different depths in the inclined borehole, L Y is the X-axis displacement deformation at different depths in the incline borehole, α i The set value range is 0°~90°.

8. A monitoring result correction system after the inclinometer tube is deflected in foundation pit monitoring, characterized in that: The system comprises: The hole opening azimuth angle measurement module is used to measure the azimuth angle α1 of the hole opening guide groove of the inclinometer pipe relative to the vertical foundation pit direction after the inclinometer pipe is buried and stabilized; The torsion angle measurement module is used to measure the torsion angle θ of the guide groove at different depths in the inclinometer borehole relative to the inclinometer borehole using a torsion meter. i ; The guide groove azimuth angle acquisition module is used to obtain the guide groove torsion angle θ based on the measured guide groove torsion angle θ. i The azimuth angle α1 is used to obtain the guide groove azimuth angle α at different depths in the inclinometer borehole relative to the vertical foundation pit direction. i ; Inclinometer module, used to measure the X / Y axial guide groove of the inclinometer tube in the forward and reverse directions by using the inclinometer, and obtain the X / Y axial displacement deformation at different depths in the inclinometer tube hole according to the measurement data; Displacement correction module, used to measure the X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth α i By projecting it to the vertical direction of the foundation pit, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained.

9. The monitoring result correction system after the inclinometer tube deflection in foundation pit monitoring according to claim 8 is characterized in that: The torsion angle measurement module is specifically used for: According to the preset measurement interval, the guide groove in the inclinometer borehole is measured from top to bottom using a torque meter, and the azimuth change measured at each measuring point is accumulated point by point to obtain the guide groove torsion angle θ of the corresponding depth of each measuring point in the entire inclinometer borehole relative to the inclinometer borehole. i .

10. The monitoring result correction system after the inclinometer tube deflection in foundation pit monitoring according to claim 8, characterized in that: The displacement correction module is specifically used for: Based on the measured X / Y axial displacement deformation at different depths in the inclinometer borehole and the guide groove azimuth angle α i , by projecting to the vertical foundation pit direction, the displacement deformation correction values ​​at different depths in the inclinometer borehole are obtained, including: S i =L X ·Cosα i +L Y ·Sinα i Among them, S i is the displacement deformation correction value, L X To measure the X-axis displacement deformation at different depths in the inclined borehole, L Y is the X-axis displacement deformation at different depths in the incline borehole, α i The set value range is 0°~90°.

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