Deep and thick dump fan foundation and settlement monitoring system and method

Abstract

The invention provides a deep and thick waste dump fan foundation and a settlement monitoring system and method.The deep and thick waste dump fan foundation comprises a protection cushion layer, a settlement monitoring system and a settlement monitoring method.The protection cushion layer is arranged on the inner bottom face of a foundation pit; the fan pile body comprises a first column body, a prismatic table and a second column body; the first column body is arranged on the upper surface of the protective cushion layer, a through hole matched with the second main body column body is formed in the middle of the prismatic table from top to bottom, the lower surface of the prismatic table is arranged on the upper surface of the first column body, the bottom end of the second main body column body is embedded in the through hole, and the top end of the second main body column body is located on the top surface of the prismatic table; and the upper surface of the second column body is used for mounting a fan tower. The contact area of the fan pile body and the landfill is increased, and the stability of the whole fan pile body in the foundation pit is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbine foundation settlement monitoring, and in particular to a deep spoil dump wind turbine foundation, a settlement monitoring system and a method thereof. Background Art

[0002] A deep dump refers to a large site formed by piling up stripped waste rock or tailings during open-pit mining. Utilizing deep dump resources for wind power construction can achieve efficient utilization of waste and promote the innovation and development of wind power technology. Since deep dumps are usually located in areas with complex geological conditions, such as soft soil, permafrost, or areas affected by hydrology, these geological conditions can easily lead to foundation settlement. For example, natural factors such as permafrost melting and groundwater level changes can cause foundation settlement problems, while human factors such as excavation and mining may also aggravate foundation settlement. In addition, the wind turbine foundation is an important structure supporting the entire wind turbine generator set, and its stability directly affects the safe operation of the wind turbine. If the wind turbine foundation settles or settles unevenly, it may cause the tower to tilt, the structure to deform, or even collapse, seriously threatening the safe operation of the wind turbine. Therefore, it is particularly necessary to monitor the settlement of the wind turbine foundation in a deep dump. Based on this, the present application proposes a deep dump wind turbine foundation, a settlement monitoring system, and a method thereof. Summary of the Invention

[0003] The present application provides a deep spoil dump fan foundation, a settlement monitoring system and a method thereof, to solve the technical problems described in the above background technology.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions: In a first aspect, the present application provides a deep dumping site fan foundation, which comprises a foundation pit of a preset depth provided on the deep dumping site for installing the fan foundation, comprising: A protective cushion layer, the protective cushion layer being arranged on the inner bottom surface of the foundation pit; A wind turbine pile body, the wind turbine pile body comprising a first column, a prism, and a second column; the first column is arranged on the upper surface of the protective cushion layer, the middle portion of the prism is provided with a through hole adapted to the second column from top to bottom, and the lower surface of the prism is arranged on the upper surface of the first column, the bottom end of the second column is embedded in the through hole, and the top end of the second column is higher than the top surface of the prism; Wherein, the upper surface of the second column is used for installing the wind turbine tower.

[0005] Optionally, the first column is anchored to the protective cushion layer via a first anchor rod, and the prism and the second column are both anchored to the first column via a second anchor rod; Wherein, the bottom ends of the first anchor rod and the second anchor rod both extend below the inner bottom surface of the foundation pit.

[0006] Optionally, the protective cushion layer, the first column, the prism and the second column are all made of a mixture of C40 or C35 grade concrete and high-performance anti-cracking fiber.

[0007] Optionally, the diameter of the first column is 6 to 13 times the diameter of the second column.

[0008] Optionally, the inner wall of the foundation pit is provided with a reinforcement layer and an anchor net in sequence from the inside to the outside.

[0009] In a second aspect, the present application provides a deep dump fan foundation settlement monitoring system for monitoring the settlement of the deep dump fan foundation described in any of the above items, comprising: a control device, a plurality of settlement monitoring points corresponding to the deep dump fan foundation, and a displacement sensor, a static level, an inclinometer, and a vibration accelerometer corresponding to each of the settlement monitoring points; The displacement sensor is arranged on the outer wall of the wind turbine tower, and is used to obtain the horizontal displacement value of the deep dump wind turbine foundation of the corresponding settlement monitoring point relative to the reference point, and transmit the horizontal displacement value to the control device; The static level is arranged on the deep dump fan foundation, and is used to obtain the vertical settlement of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the vertical settlement to the control device; Each of the settlement monitoring points corresponds to two inclinometers, which are respectively arranged at the top and bottom of the wind turbine tower, and are used to obtain the inclination value of the deep dump wind turbine foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the inclination value to the control device; The vibration accelerometer is arranged at the top of the wind turbine tower, and is used to obtain the vibration value of the deep dump wind turbine foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the vibration value to the control device; The control device is used to receive the horizontal displacement value, the vertical settlement, the inclination value and the vibration value and compare them one by one with the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold stored in the historical database, and obtain the settlement of the deep spoil dump fan foundation based on the comparison results.

[0010] Optionally, a plurality of the settlement monitoring points are arranged at equal intervals around the deep spoil dump fan foundation, and the plurality of the settlement monitoring points are all located on the central axis of the deep spoil dump fan foundation.

[0011] Optionally, the reference point is set on a strongly weathered rock layer and is at a preset distance from the foundation of the deep spoil dump fan; The preset distance is 3 to 8 times the burial depth of the deep spoil dump fan foundation.

[0012] In a third aspect, the present application provides a method for monitoring the foundation settlement of a fan in a deep dump, which is applied to any of the above-mentioned systems for monitoring the foundation settlement of a fan in a deep dump, the method comprising: Acquire, by means of a displacement sensor, a horizontal displacement value of a deep dump fan foundation at a corresponding settlement monitoring point relative to a reference point within a first preset time period, and transmit the horizontal displacement value to a control device; Obtaining, by means of a static level, the vertical settlement of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first preset time period, and transmitting the vertical settlement to the control device; Obtaining, by means of an inclinometer, an inclination value of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first preset time period, and transmitting the inclination value to the control device; Acquiring a vibration value of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first time period by a vibration accelerometer, and transmitting the vibration value to the control device; The horizontal displacement value, vertical settlement, inclination value and vibration value in the first time period are received by the control device and compared one by one with the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold. If the difference between the horizontal displacement value, the vertical settlement, the inclination value and the vibration value and the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold is greater than the preset threshold, the staff needs to take timely countermeasures to the deep spoil dump fan foundation.

[0013] Optionally, the method further includes: When the horizontal displacement value, the vertical settlement value, the inclination value, and the vibration value within the first time period are obtained multiple times, and the differences between the obtained results and the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value, and vibration threshold value are stabilized within a preset range, the horizontal displacement value, the vertical settlement value, the inclination value, and the vibration value of the deep spoil dump fan foundation within the second time period are monitored by the displacement sensor, the static level, the inclinometer, and the vibration accelerometer; The second time period is at least three times the first time period.

[0014] 1) The deep spoil dump wind turbine foundation provided in this application is achieved by opening a foundation pit for installing the wind turbine foundation in the deep spoil dump. Since the wind turbine foundation needs to be buried in the foundation pit, a protective cushion layer is provided on the inner bottom surface of the foundation pit to ensure the stability of the wind turbine foundation installation. The first column is provided on the upper surface of the protective cushion layer, and the lower surface of a prism with a through hole in the middle is provided on the upper surface of the first column. The second column passes through the through hole and is connected to the prism, thereby forming a wind turbine pile body formed by the first column, the prism, and the second column. The top of the second column is higher than the prism and is used to install the wind turbine tower on its upper surface. The first column is used to support the entire wind turbine pile body, thereby ensuring the stability of the wind turbine pile body in the foundation pit. The provision of the prism increases the contact area between the wind turbine pile body and the landfill, further improving the stability of the entire wind turbine pile body in the foundation pit.

[0015] 2) The deep spoil dump fan foundation settlement monitoring system provided in the present application, by setting up multiple settlement monitoring points corresponding to the deep spoil dump fan foundation and displacement sensors, static levels, inclinometers, and vibration accelerometers corresponding to each settlement monitoring point, measures the horizontal displacement value, vertical settlement, inclination value, and vibration value of the corresponding settlement monitoring point through the displacement sensor, static level, inclinometer, and vibration accelerometer, and transmits the horizontal displacement value, vertical settlement, inclination value, and vibration value to the control device, and compares the horizontal displacement value, vertical settlement, inclination value, and vibration value with the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value, and vibration threshold value stored in the historical database one by one through the control device, and obtains the settlement situation of the deep spoil dump fan foundation based on the comparison results. The setting of multiple settlement monitoring points can comprehensively reflect the settlement situation of the deep spoil dump fan foundation, which is convenient for the staff to take countermeasures against the settlement of the deep spoil dump fan foundation to ensure the stability of the deep spoil dump fan foundation.

[0016] 3) The settlement monitoring method for the deep spoil field fan foundation provided by this application obtains the horizontal displacement value, vertical settlement, inclination value and vibration value in the first time period, and compares the horizontal displacement value, vertical settlement value, inclination value and vibration value with the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value one by one. When the difference between the horizontal displacement value, vertical settlement value, inclination value and vibration value and the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value is greater than the preset threshold value, the staff will take timely response measures to the deep spoil field fan foundation. Otherwise, the settlement of the deep spoil field fan foundation in the first time period will continue to be monitored. This method improves the comprehensiveness of the settlement monitoring of the deep spoil field fan foundation and ensures the stability of the deep spoil field fan foundation, so that the wind power generation process can proceed stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic structural diagram of a deep spoil dump fan foundation provided in an embodiment of the present application, arranged in a foundation pit; Figure 2 A schematic structural diagram of a wind turbine pile body provided in one embodiment of the present application; Figure 3 A schematic structural diagram of a wind turbine pile body provided in an embodiment of the present application, wherein a first anchor rod and a prism are provided on a first column and a second anchor rod is provided on a second column; Figure 4 A cross-sectional view of a foundation pit provided in one embodiment of the present application; Figure 5 This is a schematic diagram of the connection between the displacement sensor, static level, inclinometer and vibration accelerometer provided in one embodiment of the present application and the control device.

[0019] In the figure: 100, foundation pit; 101, reinforcement layer; 102, anchor net; 200, protective cushion layer; 300, wind turbine pile body; 301, first column; 302, prism; 303, second column; 400, first anchor rod; 500, second anchor rod; 600, control device; 601, displacement sensor; 602, static level; 603, inclinometer; 604, vibration accelerometer. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0021] First, reference Figures 1 to 5 The present application provides a deep spoil dump fan foundation, which includes a foundation pit 100 of a preset depth opened on the deep spoil dump for installing the fan foundation, including: wherein the preset depth can be set according to actual needs, and the present application does not make any specific limitations on it.

[0022] Protective cushion layer 200 is provided on the inner bottom surface of foundation pit 100. A deep dump is a large area formed by piling up stripped waste rock or tailings during open-pit mining. Therefore, the foundation pit created on a deep dump may be uneven. Providing protective cushion layer 200 on the inner bottom surface of the foundation pit ensures that the entire lower surface of the fan foundation is on the same horizontal plane, thereby ensuring the stability of the fan foundation within the foundation pit. The thickness of protective cushion layer 200 can be set according to actual needs and is not specifically limited in this application.

[0023] The wind turbine pile body 300 includes a first column 301, a prism 302 and a second column 303; the first column 301 is arranged on the upper surface of the protective cushion layer 200, and a through hole adapted to the second column 303 is opened in the middle part of the prism 302 from top to bottom, and its lower surface is arranged on the upper surface of the first column 301, and the bottom end of the second column 303 is embedded in the through hole and its top end is higher than the top surface of the prism 302; wherein, since the first column 301 and the second column 303 have different shapes from the prism 302, the wind turbine pile body 300 formed by the first column 301, the prism 302 and the second column 303 being sequentially combined from bottom to top has a larger contact area with the landfill, thereby improving the stability of the wind turbine pile body 300 in the foundation pit 100.

[0024] The upper surface of the second column 303 is used to install the wind turbine tower. Since the stability of the wind turbine pile body 300 in the foundation pit 100 is improved, the stability of the wind turbine tower installed on the upper surface of the second column 303 is also improved accordingly.

[0025] The deep spoil yard wind turbine foundation provided in the present application is achieved by opening a foundation pit for installing the wind turbine foundation on the deep spoil yard. Since the wind turbine foundation needs to be buried in the foundation pit 100, in order to ensure the stability of the installation of the wind turbine foundation, a protective cushion layer 200 is provided on the inner bottom surface of the foundation pit 100, and the first column 301 is set on the upper surface of the protective cushion layer 200, and the lower surface of the prism 302 with a through hole in the middle is set on the upper surface of the first column 301, and the second column 303 is passed through the through hole and connected to the prism 302, thereby forming a wind turbine pile body 300 formed by the first column 301, the prism 302 and the second column 303, and the top of the second column 303 is higher than the prism 302 for installing the wind turbine tower on its upper surface, and the first column 301 is used to support the entire wind turbine pile body 300, thereby ensuring the stability of the wind turbine pile body 300 in the foundation pit 100. The provision of the prism 302 increases the contact area between the wind turbine pile body 300 and the landfill, further improving the stability of the entire wind turbine pile body 300 in the foundation pit 100 .

[0026] In some embodiments, reference Figure 3 In this application, the first column 301 is anchored to the protective cushion layer 200 via a first anchor rod 400, and the prism 302 and the second column 303 are both anchored to the first column 301 via a second anchor rod 500. To ensure the stability of the anchoring between the first column 301 and the protective cushion layer 200, multiple first anchor rods 400 are provided in this application. Furthermore, to ensure the stability of the connection between the prism 302 and the second column 303 and the first column 301, multiple second anchor rods 500 are provided for the prism 302 and the first column 301, and multiple second anchor rods 500 are provided for the second column 303 and the first column 301. Specifically, the number of first anchor rods 400 and the number of second anchor rods 500 can be set according to actual needs, and this application does not further limit them.

[0027] The bottom ends of the first anchor rod 400 and the second anchor rod 500 both extend below the inner bottom surface of the foundation pit 100. To ensure the stability of the connection between the first column 301 anchored by the first anchor rod 400 and the protective cushion layer 200, the prism 302 anchored by the second anchor rod 500 and the first column 301, and the second column 303 anchored by the second anchor rod 500 and the first column 301, the first anchor rod 400 and the second anchor rod 500 are both set below the rock layer in the foundation pit 100. The specific depth can be set according to actual needs and is not specifically limited in this application.

[0028] In some embodiments, the protective pad layer 200, the first column 301, the prism 302 and the second column 303 in the present application are all made of a mixture of C40 or C35 grade concrete and high-performance crack-resistant fibers.

[0029] In the above embodiment, the standard compressive strength value for C40 concrete is ≥40 MPa, while the standard compressive strength value for C35 concrete is ≥35 MPa (see GB50100-2010, "Code for Design of Concrete Structures" for details). High-performance crack-resistant fiber is a new material that can significantly improve the crack resistance of concrete. The fiber enhances the overall performance of concrete by filling cracks, redirecting cracks, and slowing crack propagation. The compressive and flexural strengths of the protective cushion layer 200, first column 301, prism 302, and second column 303 produced by mixing high-performance crack-resistant fiber with C40 or C35 grade concrete are significantly improved, as shown in Tables 1 to 4.

[0030] Table 1 Table 2 It can be seen from Tables 1 and 2 that, compared with the compressive strength and flexural strength of the protective cushion layer 200, the first column 301, the prism 302 and the second column 303 made only of C35 grade concrete, the compressive strength and flexural strength of the protective cushion layer 200, the first column 301, the prism 302 and the second column 303 made of C35 grade concrete mixed with high-performance crack-resistant fibers are improved. In other words, the high-performance crack-resistant fibers can enhance the compressive strength and flexural strength of the material.

[0031] Table 3 Table 4 It can be seen from Tables 3 and 4 that, compared with the compressive strength and flexural strength of the protective cushion layer 200, the first column 301, the prism 302 and the second column 303 made only of C40 grade concrete, the compressive strength and flexural strength of the protective cushion layer 200, the first column 301, the prism 302 and the second column 303 made of C40 grade concrete mixed with high-performance crack-resistant fibers are improved. In other words, the high-performance crack-resistant fibers can enhance the compressive strength and flexural strength of the material.

[0032] Depend on Figures 1 to 3 It can be seen that in some embodiments, the diameter of the first column 301 in the present application is 6 to 13 times the diameter of the second column 303. Among them, the second column 303 is used to install and support the wind turbine tower, while the first column 301 mainly supports the entire wind turbine pile body 300 and the wind turbine tower. The diameter of the first column 301 in the present application is 6 to 13 times the diameter of the second column 303, which can ensure that the contact area between the first column 301 and the protective cushion layer 200 is sufficiently large, and the contact area with the landfill in the foundation pit 100 is also sufficiently large, thereby ensuring the stability of the entire wind turbine pile body 300 and the wind turbine tower.

[0033] In some embodiments, reference Figure 4, the inner wall of the foundation pit 100 in this application is provided with a reinforcement layer 101 and an anchor net 102 in sequence from the inside to the outside. Among them, since a deep spoil dump refers to a large site formed by piling up stripped waste rock or tailings during open-pit mining, that is to say, the foundation pit 100 opened on the deep spoil dump may be uneven, and even waste rock may fall on the surrounding wall. By arranging the reinforcement layer 101 and the anchor net 102 from the inside to the outside on the inner wall of the foundation pit 100, it is possible to avoid the waste rock falling on the surrounding wall of the foundation pit 100, thereby improving the safety and flatness of the installation process of the wind turbine pile body 300, and thus ensuring the stability of the wind turbine pile body 300 in the foundation pit 100. In addition, the reinforcement layer 101 can be a concrete layer, which can be set according to actual needs, and this application does not make any specific restrictions on it.

[0034] Second, reference Figure 5 The present application provides a deep spoil dump fan foundation settlement monitoring system, which is used to monitor the settlement of the deep spoil dump fan foundation described in any of the above items, including: a control device 600, multiple settlement monitoring points corresponding to the deep spoil dump fan foundation, and a displacement sensor 601, a static level 602, an inclinometer 603, and a vibration accelerometer 604 corresponding to each settlement monitoring point; wherein, the specifications and models of the displacement sensor 601, the static level 602, the inclinometer 603, and the vibration accelerometer 604 can be set according to actual needs, and the present application does not make specific restrictions on them.

[0035] The displacement sensor 601 is arranged on the outer wall of the wind turbine tower, and is used to obtain the horizontal displacement value of the deep spoil dump wind turbine foundation of the corresponding settlement monitoring point relative to the reference point, and transmit the horizontal displacement value to the control device 600.

[0036] The static level 602 is set on the deep spoil field fan foundation, and is used to obtain the vertical settlement of the deep spoil field fan foundation of the corresponding settlement monitoring point relative to the reference point, and transmit the vertical settlement to the control device 600.

[0037] Each settlement monitoring point corresponds to two inclinometers 603, which are respectively arranged at the top and bottom of the wind turbine tower, and are used to obtain the inclination value of the deep spoil dump wind turbine foundation of the corresponding settlement monitoring point relative to the reference point, and transmit the inclination value to the control device 600.

[0038] The vibration accelerometer 604 is arranged on the top of the wind turbine tower, and is used to obtain the vibration value of the deep dump wind turbine foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the vibration value to the control device 600.

[0039] The control device 600 is configured to receive horizontal displacement values, vertical settlement values, inclination values, and vibration values ​​and compare them with preset horizontal displacement thresholds, vertical settlement thresholds, inclination thresholds, and vibration thresholds stored in a historical database, and to determine the settlement of the deep dump fan foundation based on the comparison results. The control device 600 is located in a control room adjacent to the deep dump fan foundation, and includes a data processing unit and a historical database. For details, please refer to the prior art and this application will not provide a detailed explanation thereof.

[0040] The deep spoil dump fan foundation settlement monitoring system provided by the present application is provided with a plurality of settlement monitoring points corresponding to the deep spoil dump fan foundation and a displacement sensor 601, a static level 602, an inclinometer 603, and a vibration accelerometer 604 corresponding to each settlement monitoring point. The horizontal displacement value, vertical settlement, inclination value, and vibration value of the corresponding settlement monitoring point are measured by the displacement sensor 601, the static level 602, the inclinometer 603, and the vibration accelerometer 604, and the horizontal displacement value, vertical settlement, inclination value, and vibration value are transmitted to the monitoring point. The data are input to the control device 600, and the control device 600 compares the horizontal displacement value, vertical settlement value, inclination value and vibration value with the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value stored in the historical database one by one, and the settlement of the deep spoil dump fan foundation is obtained according to the comparison result. The setting of multiple settlement monitoring points can comprehensively reflect the settlement of the deep spoil dump fan foundation, which is convenient for the staff to take countermeasures against the settlement of the deep spoil dump fan foundation to ensure the stability of the deep spoil dump fan foundation.

[0041] In some embodiments, the multiple settlement monitoring points in the present application are arranged at equal intervals around the deep spoil dump fan foundation, and the multiple settlement monitoring points are all located on the central axis of the deep spoil dump fan foundation. This can ensure the accuracy of the settlement monitoring results of the deep spoil dump fan foundation, so that the monitoring results can more comprehensively reflect the settlement of the deep spoil dump fan foundation.

[0042] In some embodiments, the reference point in this application is set on a strongly weathered rock layer and at a predetermined distance from the foundation of a deep dump fan. Specifically, the predetermined distance is 3 to 8 times the burial depth of the deep dump fan foundation. The specific value of the predetermined distance can be set according to actual needs and is not specifically limited in this application.

[0043] In the above embodiment, since the benchmark point is set to monitor the settlement of the deep dump fan foundation relative to the benchmark point at the settlement monitoring point, that is, the benchmark point serves as a reference, in order to ensure the accuracy of the settlement monitoring results of the deep dump fan foundation, it is necessary to ensure the stability of the benchmark point (that is, the position of the benchmark point should not move as much as possible during the settlement monitoring of the deep dump fan foundation). Since the deep dump refers to a large site formed by the accumulation of stripped waste rock or tailings during the open-pit mining process, the deep dump is unstable. Setting the benchmark point on a strongly weathered rock layer can improve the stability of the benchmark point and make the benchmark point a preset distance from the deep dump fan foundation (the preset distance is 3 to 8 times the burial depth of the deep dump fan foundation), so that the position of the benchmark point is as unaffected as possible by the settlement of the deep dump fan foundation, thereby ensuring the stability of the position of the benchmark point to the greatest extent.

[0044] In a third aspect, the present application provides a method for monitoring the foundation settlement of a fan in a deep dump, which is applied to any of the above-mentioned systems for monitoring the foundation settlement of a fan in a deep dump, the method comprising: S701 , obtaining, by means of the displacement sensor 601 , a horizontal displacement value of a deep dump fan foundation at a corresponding settlement monitoring point relative to a reference point within a first preset time period, and transmitting the horizontal displacement value to the control device 600 .

[0045] S702 , obtaining the vertical settlement of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first preset time period through the static level 602 , and transmitting the vertical settlement to the control device 600 .

[0046] S703 , obtaining the inclination value of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first preset time period through the inclinometer 603 , and transmitting the inclination value to the control device 600 .

[0047] S704 , obtaining a vibration value of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first time period through the vibration accelerometer 604 , and transmitting the vibration value to the control device 600 .

[0048] S705. Receive, through the control device 600, the horizontal displacement value, vertical settlement value, inclination value, and vibration value within the first time period and compare them with the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value, and vibration threshold value one by one. If the difference between the horizontal displacement value, vertical settlement value, inclination value, and vibration value and the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value, and vibration threshold value, respectively, is greater than the preset threshold value, then the staff needs to take timely countermeasures for the deep dump fan foundation; and, If the differences between the horizontal displacement value, vertical settlement, inclination value and vibration value and the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold are respectively less than the preset threshold, the horizontal displacement value, vertical settlement, inclination value and vibration value of the deep spoil dump fan foundation in the first time period are continuously monitored by the displacement sensor 601, the static level 602, the inclinometer 603 and the vibration accelerometer 604.

[0049] Among them, the first time period can be 2-3 weeks, or even longer. When the difference in data from multiple monitorings is relatively large, the monitoring time can be shortened accordingly. When the difference in data from multiple monitorings is relatively small, the monitoring time can be extended accordingly, depending on the actual monitoring situation, and this application does not make specific limitations on it here. Since a deep spoil dump refers to a large site formed by piling up stripped waste rock or tailings during open-pit mining, that is, a foundation pit opened in a deep spoil dump may make the deep spoil dump less stable, resulting in more serious settlement of the fan foundation in the deep spoil dump. In order to more comprehensively reflect the settlement of the fan foundation in the deep spoil dump, it is necessary to obtain settlement monitoring data of the fan foundation in the deep spoil dump once within a shorter period of time.

[0050] The present application provides a method for monitoring the settlement of a deep dump fan foundation, which obtains the horizontal displacement value, vertical settlement, inclination value and vibration value within a first time period, and compares the horizontal displacement value, vertical settlement value, inclination value and vibration value with a preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value one by one. When the difference between the horizontal displacement value, vertical settlement value, inclination value and vibration value and the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value is greater than the preset threshold value, the staff will take timely countermeasures to the deep dump fan foundation. Otherwise, the settlement of the deep dump fan foundation within the first time period will continue to be monitored. This method improves the comprehensiveness of the settlement monitoring of the deep dump fan foundation and ensures the stability of the deep dump fan foundation, so that the wind power generation process can proceed stably.

[0051] In some embodiments, the method for monitoring foundation settlement of a fan in a deep dump in the present application further includes: S706. When the horizontal displacement value, vertical settlement value, inclination value and vibration value in the first time period are obtained multiple times (wherein the multiple times is at least 3 times, depending on the monitoring results), and the differences between the obtained results and the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value are stabilized within the preset range, the horizontal displacement value, vertical settlement value, inclination value and vibration value of the deep spoil dump fan foundation in the second time period are monitored by the displacement sensor 601, the static level 602, the inclinometer 603 and the vibration accelerometer 604; wherein the second time period is at least 3 times the first time period.

[0052] In the above embodiment, when the difference between the obtained horizontal displacement value, vertical settlement, inclination value and vibration value and the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold is stable within the preset range (which can be set according to actual needs, and this application does not make specific limitations on it), it means that the settlement of the deep spoil dump fan foundation tends to be stable. At this time, the settlement monitoring time of the deep spoil dump fan foundation can be extended accordingly.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A deep dumping ground fan foundation, comprising a foundation pit (100) of a preset depth for installing the fan foundation on the deep dumping ground, characterized in that: include: a protective cushion layer (200), the protective cushion layer (200) being arranged on the inner bottom surface of the foundation pit (100); A wind turbine pile body (300), the wind turbine pile body (300) comprising a first column (301), a prism (302) and a second column (303); the first column (301) is arranged on the upper surface of the protective cushion layer (200); a through hole adapted to the second column (303) is provided in the middle of the prism (302) from top to bottom, and the lower surface thereof is arranged on the upper surface of the first column (301); the bottom end of the second column (303) is embedded in the through hole and the top end thereof is higher than the top surface of the prism (302); The upper surface of the second column (303) is used for mounting a wind turbine tower.

2. The deep spoil dump fan foundation according to claim 1, characterized in that: The first column (301) is anchored to the protective cushion layer (200) via a first anchor rod (400), and the prism (302) and the second column (303) are both anchored to the first column (301) via a second anchor rod (500); The bottom ends of the first anchor rod (400) and the second anchor rod (500) both extend below the inner bottom surface of the foundation pit (100).

3. The deep spoil dump fan foundation according to claim 1, characterized in that: The protective cushion layer (200), the first column (301), the prism (302), and the second column (303) are all made of a mixture of C40 or C35 grade concrete and high-performance anti-cracking fibers.

4. The deep spoil dump fan foundation according to claim 1, characterized in that: The diameter of the first column (301) is 6 to 13 times the diameter of the second column (303).

5. The deep spoil dump fan foundation according to claim 1, characterized in that: The inner wall of the foundation pit (100) is provided with a reinforcement layer (101) and an anchor net (102) in sequence from the inside to the outside.

6. A deep dump fan foundation settlement monitoring system, characterized in that: Used for monitoring the settlement of a deep dump fan foundation according to any one of claims 1 to 5, comprising: a control device (600), a plurality of settlement monitoring points corresponding to the deep dump fan foundation, and a displacement sensor (601), a static level (602), an inclinometer (603), and a vibration accelerometer (604) corresponding to each of the settlement monitoring points; The displacement sensor (601) is arranged on the outer wall of the wind turbine tower, and is used to obtain the horizontal displacement value of the deep dump wind turbine foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the horizontal displacement value to the control device (600); The static level (602) is arranged on the deep dump fan foundation, and is used to obtain the vertical settlement amount of the deep dump fan foundation relative to the reference point at the corresponding settlement monitoring point, and transmit the vertical settlement amount to the control device (600); Each settlement monitoring point corresponds to two inclinometers (603), which are respectively arranged at the top and bottom of the wind turbine tower, and are used to obtain the inclination value of the deep dump wind turbine foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the inclination value to the control device (600); The vibration accelerometer (604) is arranged on the top of the wind turbine tower, and is used to obtain the vibration value of the deep dump wind turbine foundation at the corresponding settlement monitoring point relative to the reference point, and transmit the vibration value to the control device (600); The control device (600) is used to receive the horizontal displacement value, the vertical settlement amount, the inclination value and the vibration value and compare them with the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value and vibration threshold value stored in a historical database, and obtain the settlement condition of the deep spoil dump fan foundation based on the comparison result.

7. The deep dump fan foundation settlement monitoring system according to claim 6 is characterized in that: The plurality of settlement monitoring points are arranged at equal intervals around the deep spoil dump fan foundation, and the plurality of settlement monitoring points are all located on the central axis of the deep spoil dump fan foundation.

8. The deep dump fan foundation settlement monitoring system according to claim 6 is characterized in that: The reference point is set on the strongly weathered rock layer and is at a preset distance from the fan foundation of the deep spoil dump; The preset distance is 3 to 8 times the burial depth of the deep spoil dump fan foundation.

9. A method for monitoring the foundation settlement of a fan in a deep dump, characterized in that: The method applied to the deep dump fan foundation settlement monitoring system according to any one of claims 6 to 8 comprises: Acquire, by means of a displacement sensor, a horizontal displacement value of a deep dump fan foundation at a corresponding settlement monitoring point relative to a reference point within a first preset time period, and transmit the horizontal displacement value to a control device; Obtaining, by means of a static level, the vertical settlement of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first preset time period, and transmitting the vertical settlement to the control device; Obtaining, by means of an inclinometer, an inclination value of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first preset time period, and transmitting the inclination value to the control device; Acquiring a vibration value of the deep dump fan foundation at the corresponding settlement monitoring point relative to the reference point within a first time period by a vibration accelerometer, and transmitting the vibration value to the control device; The horizontal displacement value, vertical settlement, inclination value and vibration value in the first time period are received by the control device and compared one by one with the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold. If the difference between the horizontal displacement value, the vertical settlement, the inclination value and the vibration value and the preset horizontal displacement threshold, vertical settlement threshold, inclination threshold and vibration threshold is greater than the preset threshold, the staff needs to take timely countermeasures to the deep spoil dump fan foundation.

10. The method for monitoring foundation settlement of a fan in a deep dump according to claim 9, characterized in that: The method further comprises: When the horizontal displacement value, the vertical settlement value, the inclination value, and the vibration value within the first time period are obtained multiple times, and the differences between the obtained results and the preset horizontal displacement threshold value, vertical settlement threshold value, inclination threshold value, and vibration threshold value are stabilized within a preset range, the horizontal displacement value, the vertical settlement value, the inclination value, and the vibration value of the deep spoil dump fan foundation within the second time period are monitored by the displacement sensor, the static level, the inclinometer, and the vibration accelerometer; The second time period is at least three times the first time period.

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