Real-time monitoring device for creep deformation of pile foundation in offshore soft soil field

Abstract

The utility model discloses an offshore soft soil field pile foundation creep real-time monitoring device which comprises a supporting table, a supporting column is fixedly connected to the bottom of the supporting table, connecting rods are fixedly connected to the two sides of the top of the supporting table, a cross beam is fixedly connected to the top between the connecting rods, and a plurality of monitoring sensing devices are arranged on the cross beam. The three-axis tilt angle sensor and the laser range finder are arranged on the cross beam of the device, the tilt angle change value between the pile foundations is monitored in real time, then differential settlement between the pile foundations is simply and rapidly calculated, and the pile foundation-ground settlement change value can be monitored in real time; the three-axis tilt angle sensor and the laser range finder are easy to arrange and operate, data are uploaded to the cloud end in real time, compared with a traditional monitoring method, manpower and material resources are greatly saved, and the three-axis tilt angle sensor has high adaptability and can meet the measurement requirements under various complex environment conditions, such as high temperature, high humidity and a strong magnetic field.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pile foundation creep monitoring, particularly to a offshore soft soil site pile foundation creep real -time monitoring device. BACKGROUND

[0002] With the rapid development of local infrastructure, land resources are increasingly scarce, in order to solve this problem, the coastal areas of our country have carried out large-scale reclamation engineering. The soft soil formed by reclamation has the characteristics of high compressibility, high natural moisture content, small permeability coefficient and large pore ratio, and has obvious creep characteristics under load. Soft soil creep will cause differential settlement of building pile foundation, if the displacement is too large, on the one hand, it may cause damage to the lower structure of the building, on the other hand, it may affect the normal use of the upper structure, which will seriously threaten the normal use of the building, so it is necessary to monitor the pile foundation creep in real time.

[0003] Nowadays, pile foundation creep monitoring devices mostly use paste settlement bar monitoring, which is low in efficiency and cannot timely reflect the differential settlement of pile foundation and the settlement of pile foundation surface.

[0004] A model for measuring underground displacement using an inclinometer disclosed in the Chinese patent document with publication number KR20100114738A measures the displacement of the base rock moving in a random direction in the horizontal and vertical directions. Composition: the underground displacement measurement model using the inclinometer includes an inclinometer tube 21, an inclinometer probe 22 and a data recorder 23, the inclinometer tube is integrally inserted into the hole on the base rock, and the inclinometer probe is inserted into the inclinometer tube. The inclinometer probe detects the depth inclination signal of the inclinometer tube according to the base rock movement, and the data recorder is based on the signal detected from the inclinometer probe, but the measurement of the model for measuring underground displacement using the inclinometer needs to be installed underground, which is relatively complex and inconvenient to replace the position.

[0005] In order to solve the problems existing in the prior art, it is a problem worth studying to provide a offshore soft soil site pile foundation creep real-time monitoring device. UTILITY MODEL CONTENT

[0006] The utility model discloses a offshore soft soil site pile foundation creep real-time monitoring device, which overcomes the shortcomings of low efficiency and inability to timely reflect the differential settlement of pile foundation and the settlement of pile foundation surface in the prior art, and realizes high detection efficiency and fast reaction.

[0007] The utility model discloses a offshore soft soil site pile foundation creep real-time monitoring device, which overcomes the shortcomings of low efficiency and inability to timely reflect the differential settlement of pile foundation and the settlement of pile foundation surface in the prior art, and realizes high detection efficiency and fast reaction.

[0008] The utility model provides a kind of offshore soft soil site pile foundation creep real-time monitoring device, including support platform, the bottom of support platform is fixedly connected with support column, the top of support platform both sides is fixedly connected with connecting rod, the top between connecting rod is fixedly connected with crossbeam, and a plurality of monitoring sensing devices are provided on crossbeam.

[0009] The monitoring sensing device includes a three-axis tilt sensor fixedly connected to the top center of the crossbeam and a laser range finder fixedly connected to the bottom center of the crossbeam. The three-axis tilt sensor and the laser range finder are arranged to be simple to operate and to upload data to the cloud in real time. Compared with traditional monitoring methods, the offshore soft soil site pile foundation creep real-time monitoring device greatly saves manpower and resources.

[0010] The X-axis sensing direction of the three-axis tilt sensor is perpendicular to the length direction of the crossbeam. The measurement angle of the three-axis tilt sensor is positive in the clockwise rotation direction around the X-axis. The three-axis tilt sensor can maintain stable measurement performance in harsh environments such as high temperature, high humidity, and strong magnetic field.

[0011] The three-axis tilt sensor and the laser range finder are connected to the pile foundation creep monitoring terminal through a communication network. This real-time monitoring capability is of great significance to ensure the safety and stability of the offshore soft soil site pile foundation.

[0012] The ranging end of the laser range finder is vertically downward. The support platform is provided with a circular hole corresponding to the position of the laser range finder.

[0013] The three-axis tilt sensor and the laser range finder are fixedly connected to the crossbeam through structural adhesive.

[0014] The support platform is fixedly connected to the offshore soft soil site through the support column. The support platform is fixedly connected to the support column and the connecting rod. The support column and the connecting rod are perpendicular to the support platform.

[0015] A kind of offshore soft soil site pile foundation creep real-time monitoring method includes the following steps:

[0016] Step one: the length of crossbeam is L, and the angle of three-axis tilt sensor at this time is initial angle θ X0 , and the initial distance of laser range finder is h0;

[0017] Step two: the three-axis acceleration sensor and the laser range finder upload the bridge pier rotation angle value to the pile foundation creep monitoring terminal in real time. The sensor angle at time t is θ X , and the laser range finder data is h t , then the rotation angle change amount in ~t time period is Δθ X = θ X - θ X0 ;

[0018] Step three: pile foundation differential settlement ΔH=L×sinΔθX ; pile base surface settlement change amount Δh = h t -h0.

[0019] Positive beneficial effects:

[0020] 1. The offshore soft soil site pile foundation creep real-time monitoring device, three-axis inclination sensors and laser range finders are arranged on the cross beam of the device, the inclination change value between the pile foundations is monitored in real time, the differential settlement between the pile foundations is calculated simply and quickly, and the pile foundation-ground settlement change value can be monitored in real time; compared with the traditional monitoring method, the three-axis inclination sensors and the laser range finders are simple to arrange and operate, data is uploaded to the cloud in real time, and manpower and material resources are greatly saved.

[0021] 2. The offshore soft soil site pile foundation creep real-time monitoring device, the three-axis inclination sensor has strong adaptability and can meet the measurement requirements under various complex environmental conditions, whether it is high temperature, high humidity, or strong magnetic field and other harsh environments, the three-axis inclination sensor can maintain stable measurement performance.

[0022] 3. The offshore soft soil site pile foundation creep real-time monitoring device realizes real-time monitoring of pile foundation creep, which means that engineering personnel can grasp the deformation of the pile foundation at any time, discover potential safety hazards in time, and take corresponding measures for treatment, and this real-time monitoring capability has important significance for ensuring the safety and stability of the offshore soft soil site pile foundation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall layout of the utility model

[0024] Figure 2 It is the three-axis inclination sensor of the utility model

[0025] Figure 3 It is the laser range finder of the utility model

[0026] Figure 4 It is the three-axis inclination sensor arrangement drawing of the utility model

[0027] Figure 5 It is the laser range finder arrangement drawing of the utility model.

[0028] In the drawing: 1 - support table, 2 - support column, 3 - connecting rod, 4 - cross beam, 5 - three-axis inclination sensor, 6 - laser range finder. DETAILED DESCRIPTION

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] Example 1

[0031] like Figures 1 to 5 As shown, a real-time monitoring device for pile foundation creep in nearshore soft soil sites includes a support platform 1, a support column 2 fixedly connected to the bottom of the support platform 1, connecting rods 3 fixedly connected to both sides of the top of the support platform 1, a crossbeam 4 fixedly connected to the top between the connecting rods 3, and several monitoring sensors are installed on the crossbeam 4.

[0032] like Figure 1 As shown, the monitoring sensing device includes a triaxial tilt sensor 5 fixedly connected to the center of the top of the crossbeam 4, and a laser rangefinder 6 fixedly connected to the center of the bottom of the crossbeam 4. By setting the triaxial tilt sensor 5 and the laser rangefinder 6 on the crossbeam 4 of this device, the tilt angle change value between the pile foundations can be monitored in real time, and the differential settlement between the pile foundations can be calculated simply and quickly. The pile foundation-ground settlement change value can also be monitored in real time. The triaxial tilt sensor and laser rangefinder are easy to set up and operate, and the data is uploaded to the cloud in real time. Compared with the traditional monitoring method, it greatly saves manpower and material resources.

[0033] like Figures 1 to 2 As shown, the X-axis sensing direction of the triaxial tilt sensor 5 is perpendicular to the length direction of the crossbeam 4. The measurement angle of the triaxial tilt sensor 5 is positive when rotating clockwise around the X-axis. By limiting the sensing direction of the triaxial tilt sensor 5, it can monitor the tilt state of the crossbeam in real time. The multi-dimensional high-precision measurement and real-time data transmission of the triaxial tilt sensor have become the core tool for creep monitoring of nearshore soft soil pile foundations. The integration with laser rangefinders and wireless communication technologies not only improves monitoring efficiency but also provides intelligent protection for engineering safety. Moreover, the triaxial tilt sensor can simultaneously measure the tilt angle in three directions, which allows it to more comprehensively reflect the deformation of the pile foundation. Compared with single-axis or dual-axis sensors, the triaxial tilt sensor can provide richer data, helping engineers to more accurately judge the creep trend and stability of the pile foundation. The nearshore soft soil site environment is complex, and the creep of the pile foundation is affected by a variety of factors. The triaxial tilt sensor has strong adaptability and can cope with the measurement needs under various complex environmental conditions. Whether it is a high temperature, high humidity, or strong magnetic field, the triaxial tilt sensor can maintain stable measurement performance.

[0034] The triaxial tilt sensor 5 and the laser range finder 6 are both connected with the pile foundation creep monitoring terminal signal through a communication network, and the information monitored by the triaxial tilt sensor 5 and the laser range finder 6 can be collected and transmitted in real time through the communication network, so that the real-time monitoring of the pile foundation creep can be realized, which means that the deformation of the pile foundation can be grasped by the engineering personnel at any time, the potential safety hazards can be found in time, and corresponding measures can be taken for treatment. The real-time monitoring capability has important significance for ensuring the safety and stability of the offshore soft soil site pile foundation.

[0035] Embodiment 2

[0036] As shown in Figures 1 to 5 , the ranging end of the laser range finder 6 is vertically downward, and the support table 1 is provided with a circular hole corresponding to the position of the laser range finder 6. By providing the circular hole on the support table 1, the laser range finder 6 can directly detect the distance between the cross beam 4 and the ground pile foundation through the circular hole.

[0037] As shown in Figure 1 , the triaxial tilt sensor 5 and the laser range finder 6 are fixedly connected with the cross beam 4 through structural glue. The triaxial tilt sensor 5 and the laser range finder 6 are fixed on the cross beam 4 through the structural glue, so that they can be monitored in real time. Further, the clamping structure is arranged on the top and bottom of the cross beam 4, so that the triaxial tilt sensor 5 and the laser range finder 6 are assembled and connected with the cross beam 4, so that the two can be kept stable to complete the real-time monitoring of the container. When maintenance or replacement is needed, the triaxial tilt sensor 5 and the laser range finder 6 can be disassembled from the cross beam 4.

[0038] Embodiment 3

[0039] As shown in Figures 1 to 5 , the support table 1 is fixedly connected with the offshore soft soil site through the support column 2. The support table 1 is fixedly connected with the support column 2 and the connecting rod 3. The support column 2 and the connecting rod 3 are both perpendicular to the support table 1.

[0040] An offshore soft soil site pile foundation creep real-time monitoring method, comprising the following steps:

[0041] Step one: the length of the cross beam is L, and the angle of the triaxial tilt sensor at this time is the initial angle θ X0 , and the initial distance of the laser range finder is h0;

[0042] Step two: the triaxial acceleration sensor and the laser range finder upload the bridge pier angle value to the pile foundation creep monitoring terminal in real time. The sensor angle at time t is θ X , and the laser range finder data is h t . Therefore, the angle change amount in the time period 0-t is Δθ X = θ X - θ X0 ;

[0043] Step three: pile foundation differential settlement AH=L*sin delta theta X ; pile foundation surface settlement change amount Ah=h t -h0.

[0044] The above merely aims to illustrate the technical solutions of the present application and is not intended to be limiting, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present application should be encompassed within the scope of the claims of the present application, as long as they do not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A real-time monitoring device for pile foundation creep in nearshore soft soil sites, characterized in that: It includes a support platform (1), a support column (2) is fixedly connected to the bottom of the support platform (1), and connecting rods (3) are fixedly connected to both sides of the top of the support platform (1). A crossbeam (4) is fixedly connected between the top of the connecting rods (3), and several monitoring and sensing devices are provided on the crossbeam (4).

2. The real-time monitoring device for pile foundation creep in nearshore soft soil sites according to claim 1, characterized in that: The monitoring and sensing device includes a three-axis tilt sensor (5) fixedly connected to the center of the top of the crossbeam (4), and a laser rangefinder (6) fixedly connected to the center of the bottom of the crossbeam (4).

3. The real-time monitoring device for pile foundation creep in nearshore soft soil sites according to claim 2, characterized in that: The X-axis sensing direction of the triaxial tilt sensor (5) is perpendicular to the length direction of the crossbeam (4), and the measurement angle of the triaxial tilt sensor (5) is positive in the direction of clockwise rotation around the X-axis.

4. The real-time monitoring device for pile foundation creep in nearshore soft soil sites according to claim 2, characterized in that: The triaxial tilt sensor (5) and the laser rangefinder (6) are both connected to the pile foundation creep monitoring terminal via a communication network.

5. The real-time monitoring device for pile foundation creep in nearshore soft soil sites according to claim 2, characterized in that: The measuring end of the laser rangefinder (6) is vertically downward, and the support platform (1) has a circular hole corresponding to the position of the laser rangefinder (6).

6. The real-time monitoring device for pile foundation creep in nearshore soft soil sites according to claim 2, characterized in that: The triaxial tilt sensor (5) and the laser rangefinder (6) are fixedly connected to the crossbeam (4) by structural adhesive.

7. The real-time monitoring device for pile foundation creep in nearshore soft soil sites according to claim 1, characterized in that: The support platform (1) is fixedly connected to the nearshore soft soil site through the support column (2). The support platform (1) is fixedly connected to the support column (2) and the connecting rod (3) respectively. The support column (2) and the connecting rod (3) are both perpendicular to the support platform (1).

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