A pile foundation oblique load test system and test method

Abstract

The present application proposes a pile foundation oblique load test system and test method, which relates to the technical field of pile foundation pull-out test. The system includes a test pile body, a tension providing device, a mobile load simulation device and a data acquisition device, wherein the tension providing device is fixedly arranged above the test ground, separated from the test pile body by a predetermined distance, and is used to apply an oblique pull-out force to the test pile body; the mobile load simulation device is connected to the tension providing device, and is used to provide a dynamically variable mobile load, so that the dynamically variable mobile load and the oblique pull-out force generate a load-simulated pull-out force acting on the test pile body; the data acquisition device is used to collect pull-out test data of the test pile body when it is subjected to the load-simulated pull-out force. The present technical solution can obtain pull-out test data of oblique pull-out pile foundations, improve the accuracy and effectiveness of oblique pull-out test data, and provide a basis for the calculation and design of mechanical parameters of oblique pull-out pile foundations in various scenarios.

Description

Technical Field

[0001] The present application relates to the technical field of pile foundation pull-out test, and in particular to a pile foundation oblique load test system and test method. Background Art

[0002] In recent years, the rapid development of new energy projects, especially the vigorous development of photovoltaic power stations, has gradually faced many problems, one of which is the land use problem. Photovoltaic power stations occupy a large area and have strict requirements on terrain. The available flat areas are gradually becoming less and less. The development of photovoltaic power stations has gradually shifted from flat areas to mountainous and hilly areas with more complex terrain. At the same time, the foundation of photovoltaic power station brackets mostly adopts short pile foundation.

[0003] In mountainous and hilly areas with complex topography and geology, designers design various types of short pile foundations based on the topography, geology, and superstructure. Due to the short length of the short pile foundation, the force of the short pile foundation is no longer limited to vertical compression, vertical pull-out, and horizontal force, but is mostly inclined tension at various angles, especially for photovoltaic large-span flexible bracket foundations, which have more flexible and complex force characteristics. At the same time, short pile foundations in mountainous and hilly areas are mostly located on slopes, and the force on the pile side is uneven.

[0004] At present, the scheme of pile foundation load test can generally only realize vertical and horizontal static load tests. The test results have little reference value for the design of oblique tension pile foundations, and it is impossible to measure and collect the test data of the oblique load of the pile foundation. Summary of the invention

[0005] The purpose of the present application is to overcome at least one of the shortcomings of the above-mentioned prior art and to provide a pile foundation oblique load test system and test method that can measure and collect test data of pile foundation oblique load, thereby improving the accuracy and effectiveness of oblique pull-out test data and providing a basis for the calculation and design of mechanical parameters of oblique tension pile foundations in various scenarios.

[0006] Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

[0007] According to a first aspect of the present application, a pile foundation oblique load test system is provided, the system comprising:

[0008] The test pile is buried below the test ground;

[0009] A tension providing device, fixedly arranged above the test ground and spaced a predetermined distance from the test pile body, for applying an oblique pulling force to the test pile body;

[0010] A moving load simulation device, connected to the tension providing device, for providing a dynamically variable moving load, so that the dynamically variable moving load and the oblique pulling force generate a load simulating pulling force acting on the test pile body;

[0011] The data acquisition device is used to acquire the pull-out test data of the test pile body when it is subjected to the load-simulated pull-out force.

[0012] In an exemplary embodiment of the present application, based on the aforementioned scheme, the tension providing device includes: a support module; a gravity control module; a tension traction rope, one end of which is fixedly connected to the test pile body, the other end of which is fixedly connected to the gravity control module, and the middle part is connected to the top of the support module, and the gravity control module is suspended from the support module through the tension traction rope; wherein the gravity control module is used to control and adjust the vertical gravity so as to convert the vertical gravity into an oblique pulling force on the test pile body through the tension traction rope and the support module.

[0013] In an exemplary embodiment of the present application, based on the aforementioned scheme, the support module includes: a fixed support body, including at least one support foot and a support top; a pulley fixedly connected to the support top for supporting and connecting the tension traction rope; a fixed support platform fixedly connected to the support foot for supporting and fixing the fixed support body.

[0014] In an exemplary embodiment of the present application, based on the aforementioned scheme, the gravity control module includes: at least one gravity weight; a supporting plate, including at least one connecting portion, through which the tension traction rope is fixedly connected to the supporting plate for placing the gravity weight; wherein, when the number of the gravity weights placed on the supporting plate is different, different vertical gravity is generated on the tension traction rope.

[0015] In an exemplary embodiment of the present application, based on the aforementioned scheme, the test pile body includes: a pile base body, buried below the test ground; and a pre-embedded pull anchor bolt, arranged at one end of the pile base body close to the test ground and fixedly connected to one end of the tension traction rope.

[0016] In an exemplary embodiment of the present application, based on the aforementioned solution, the support module further includes a height adjustment device, one side of the height adjustment device is fixedly connected to the fixed support platform, and the other side of the height adjustment device is fixedly connected to the support foot, for adjusting the height of the fixed bracket body.

[0017] In an exemplary embodiment of the present application, based on the aforementioned scheme, the mobile load simulation device includes: a mobile load vehicle, used to provide dynamically variable mobile loads of different directions and sizes; a load traction rope, one end of which is fixedly connected to the mobile load vehicle, and the other end of which is fixedly connected to the tension traction rope of the tension providing device; wherein the dynamically variable mobile load provided by the mobile load vehicle generates a load simulation pull-out force acting on the test pile body through the load traction rope and the oblique pull-out force on the tension traction rope.

[0018] In an exemplary embodiment of the present application, based on the aforementioned scheme, the data acquisition device includes: a plurality of tension meter devices, respectively arranged on the tension traction rope of the tension providing device and the load traction rope of the mobile load simulation device, for real-time measurement and recording of tension test data on the tension traction rope and the load traction rope; a plurality of monitoring elements, pre-buried on a side of the test pile body away from the tension providing device, for real-time measurement and recording of the pull-out test data of the pile side of the test pile body and the nearby soil.

[0019] According to a second aspect of the present application, a pile foundation oblique load test method is provided, which is applied to the pile foundation oblique load test system in the first aspect, and the method comprises:

[0020] Installing the pile foundation oblique load test system;

[0021] Dynamically adjusting the tension providing device in the pile foundation oblique load test system according to a preset test design scheme to control the oblique pulling force applied by the tension providing device to the test pile body in the pile foundation oblique load test system;

[0022] Dynamically controlling the dynamically variable moving load provided by the moving load simulation device in the pile foundation oblique load test system according to the test design scheme, so that the dynamically variable moving load and the oblique pull-out force generate a load-simulating pull-out force acting on the test pile body;

[0023] The data acquisition device measures and records the dynamic test data of the test pile body during the process of being subjected to the load-simulated pull-out force.

[0024] In an exemplary embodiment of the present application, based on the aforementioned scheme, the installation of the pile foundation oblique load test system includes: drilling a pile body installation hole to a designed depth in the soil layer of the test ground, and pre-embedding the monitoring element in the data acquisition device in the soil layer; forming a test pile body with a pre-embedded pull-out anchor in the pile body installation hole; assembling the support module in the tension providing device, and installing a tension traction rope, so as to fix one end of the tension traction rope with the pre-embedded pull-out anchor, and fix the other end with the gravity control module in the tension providing device, and connect the middle part of the tension traction rope with the top of the support module, and install the tension meter device in the data acquisition device on the tension traction rope; fix a section of the load traction rope in the mobile load simulation device with the tension traction rope, and fix the other end of the load traction rope with the mobile load vehicle in the mobile load simulation device, and install the tension meter device on the load traction rope to complete the installation of the pile foundation oblique load test system.

[0025] It can be seen from the above technical solution that the present application has at least one of the following advantages and positive effects:

[0026] According to the pile foundation oblique load test system provided in the embodiment of the present application, a real pile foundation is simulated by a test pile body buried below the test ground, and a tension providing device is fixedly arranged above the test ground and applies an oblique pull-out force to the test pile body, and a dynamically variable moving load is provided by a moving load simulation device, so that the dynamically variable moving load and the oblique pull-out force generate a load-simulated pull-out force acting on the test pile body, and then the pull-out test data of the test pile body when subjected to the load-simulated pull-out force can be collected by a data acquisition device. On the one hand, by applying a pulling force providing device to the test pile body with an oblique pull-out force, combined with a moving load simulation device that provides a dynamically variable moving load, the load-simulated pull-out force on the test pile body in a real scene can be effectively simulated, thereby realizing the experiment of the oblique load on the pile foundation, and effectively improving the accuracy and effectiveness of the oblique pull-out test data; on the other hand, the pull-out test data of the test pile body when subjected to the load-simulated pull-out force can be measured and collected and recorded in real time through the data acquisition device, further ensuring the accuracy and timeliness of the oblique pull-out test data, and recording the pull-out test data from multiple aspects to ensure the comprehensiveness and analyzability of the oblique pull-out test data, providing a basis for the calculation and design of mechanical parameters of oblique tension pile foundations in various real application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0028] Figure 1It is a structural schematic diagram of a pile foundation oblique load test system in one embodiment of the present application.

[0029] Figure 2 It is a schematic flow chart of a pile foundation oblique load test method in one embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the process of installing a pile foundation oblique load test system in one embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of the process of realizing data collection of pile foundation oblique load test in one embodiment of the present application.

[0032] Figure 1 The main component reference numerals are described as follows:

[0033] 1. Test pile body; 11. Pile basic body; 12. Pre-buried pull-out anchor bolts;

[0034] 2. Tension providing device; 21. Support module; 211. Fixed bracket body; 212. Pulley; 213. Fixed support platform; 22. Gravity control module; 221. Gravity weight; 222. Loading plate; 23. Tension traction rope;

[0035] 3. Mobile load simulation device; 31. Mobile load vehicle; 32. Load traction rope;

[0036] 4. Data acquisition device; 41. Tension meter equipment; 42. Monitoring element;

[0037] 5. Test ground. DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0039] The terms "about" and "approximately" used in this application generally mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The numbers given here are approximate numbers, which means that in the absence of specific instructions, the meanings of "about", "approximately", "roughly" and "approximately" can still be implied.

[0040] Although relative terms such as "upper" and "lower" are used in this application to describe the relative relationship of one component of the illustration to another component, these terms are used in this application only for convenience, such as the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned over and turned upside down, the component described as being "upper" will become the component "lower". Other relative terms, such as "high", "low", "top", "bottom", "front", "back", "left", "right", etc., are also used to have similar meanings. When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0041] In the present application, the terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising", "including" and "having" are used to express an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0042] The embodiment of the present application provides a pile foundation oblique load test system, which includes a test pile body, a tension providing device, a mobile load simulation device and a data acquisition device. The pile foundation oblique load test system can be used to measure and collect test data of the pile foundation oblique load, improve the accuracy and effectiveness of the oblique pull-out test data, and provide a basis for the calculation and design of mechanical parameters of oblique tension pile foundations in various scenarios.

[0043] refer to Figure 1 As shown, the pile foundation oblique load test system in the embodiment of the present application may include a test pile body 1, a tension providing device 2, a moving load simulation device 3 and a data acquisition device 4. Among them:

[0044] The test pile body 1 refers to a pile body used to simulate a short pile foundation in a real application environment. For example, the test pile body 1 can be used to simulate a photovoltaic pile foundation, or it can be used to simulate a micro-building pile foundation. This example embodiment does not make any special limitations on the real application environment that the test pile body 1 needs to simulate.

[0045] The test pile body 1 can be any type of pile body, formed by the pile-forming method in the real application environment. For example, the test pile body 1 can be a reinforced concrete cast-in-place pile, or a prefabricated pile, and of course a spiral steel pile. The specific type can be determined according to the short pile type in the actual application environment. In this example embodiment, there is no special limitation on the pile type of the test pile body 1.

[0046] The test pile body 1 can be pre-buried under the test ground 5. The test ground 5 refers to a terrain environment constructed to simulate the actual application environment. For example, the test ground can be a test site simulating hills, or a test site simulating mountains or deserts. It can be constructed and simulated according to the site structure of the actual application environment. This exemplary embodiment does not specifically limit the terrain type or terrain structure of the test ground. Figure 1 As shown, the test ground 5 may be a test site simulating a hill. It can be understood by those skilled in the art that Figure 1 The test ground 5 is only a schematic example, and the test ground 5 is not constructed only as this example. Different test grounds can be set according to different real application environments to perform pile foundation oblique load tests. The protection scope of this embodiment is not limited to Figure 1 Limited to the records in.

[0047] The tension providing device 2 can be fixedly arranged above the test ground 5, and spaced a predetermined distance from the test pile body 1, and is used to apply an oblique pulling force to the test pile body 1. For example, the tension providing device 2 can apply an oblique upward pulling force with a certain inclination angle on the test pile body 1 by a static pulling method controlled by a bracket combined with the number of weights. Taking the test pile body 1 as a photovoltaic pile body foundation as an example, the tension providing device 2 can effectively simulate the oblique pulling force generated when the photovoltaic panel assembly fixed on the photovoltaic pile body foundation is subjected to lateral moving loads such as wind loads; of course, the tension providing device 2 can also be a winch device, and the oblique pulling force is applied to the test pile body 1 at a certain inclination angle by a winch device with controllable tension, which can effectively simulate the oblique pulling force generated when the test pile body 1 is subjected to different degrees of lateral moving loads. This exemplary embodiment does not specifically limit the type of the tension providing device 2 and the method of generating the oblique pulling force.

[0048] The mobile load simulation device 3 can be connected to the tension providing device 2, and can be mainly used to provide a dynamically variable mobile load, so that the dynamically variable mobile load and the oblique pull-out force generate a load-simulating pull-out force acting on the test pile body. The pull-out device 2 can generate a large and constant oblique pull-out force on the test pile body 1, but at this time the pull-out device 2 cannot complete the subtle control of the pull-out force, such as the direction and dynamic size of the pull-out force, and cannot accurately simulate the load pull-out force of the fixed object on the short pile foundation in the real application environment when it is subjected to the joint action of lateral mobile loads in different directions; therefore, the mobile load simulation device 3 can be connected to the tension providing device 2, and the tension providing device 2 generates a large oblique pull-out force, and the mobile load simulation device 3 provides a dynamically variable mobile load, so as to generate a load-simulating pull-out force acting on the test pile body 1 together with the oblique pull-out force, thereby effectively and accurately simulating the load pull-out force when the lateral mobile loads in different directions in the real application environment act together, and then effectively improving the accuracy and effectiveness of the oblique pull-out test data.

[0049] The data acquisition device 4 can be used to collect the pull-out test data of the test pile body when it is subjected to a load-simulated pull-out force. For example, the data acquisition device can be a monitoring element arranged on the pile side of the test pile body 1 and in the nearby soil, and is used to measure and record the deformation, displacement, pressure and other data of the pile side soil and nearby soil when the test pile body 1 is subjected to a load-simulated pull-out force; the data acquisition device can also be a tensile meter device, which is arranged on the test pile body 1, the tension providing device 2 or the mobile load simulation device to monitor the tension data.

[0050] By applying a pulling force providing device 2 to the test pile body 1 with an oblique pulling force, combined with a moving load simulation device 3 that provides a dynamically variable moving load, the load-simulated pulling force on the test pile body 1 in a real scene can be effectively simulated, thereby realizing the experiment of the oblique load on the pile foundation, and effectively improving the accuracy and effectiveness of the oblique pulling test data; the pulling test data of the test pile body when subjected to the load-simulated pulling force can be measured and collected and recorded in real time by the data acquisition device 4, further ensuring the accuracy and timeliness of the oblique pulling test data, and recording the pulling test data from multiple aspects to ensure the comprehensiveness and analyzability of the oblique pulling test data, providing a basis for the calculation and design of mechanical parameters of oblique tension pile foundations in various real application scenarios.

[0051] Next, combine Figure 1 The pile foundation oblique load test system in the embodiment of the present application is described in detail.

[0052] In an exemplary embodiment of the present application, reference Figure 1 As shown, the tension providing device 2 may include a support module 21, a gravity control module 22 and a tension traction rope 23. Among them:

[0053] The support module 21 is mainly used to provide a height above the ground for the tension traction rope 23, so that the tension traction rope 23 forms a certain inclination angle with the ground, so as to apply an oblique pulling force with a certain inclination angle on the test pile body 1. For example, the support module can be a tripod bracket, a fixed bracket, or a micro gantry. This exemplary embodiment does not specifically limit the support method of the support module 21.

[0054] The gravity control module 22 can be used to control and adjust the vertical gravity, and the vertical gravity can be used as the tension source of the tension traction rope 23. Through the support module 21 and the tension traction rope 23, the vertical gravity generated by the gravity control module 22 can be converted into an oblique pulling force applied by the tension traction rope 23 to the test pile body 1.

[0055] One end of the tension traction rope 23 can be fixedly connected to the test pile body 1, the other end can be fixedly connected to the gravity control module 22, and the middle part can be connected to the top of the support module 21, and the gravity control module 22 can be suspended from the support module 21 through the tension traction rope 23. Specifically, the tension traction rope 23 can be a steel wire rope or a synthetic fiber rope, as long as the strength of the tension traction rope 23 is large and the deformation degree is small. This exemplary embodiment does not specifically limit the type of the tension traction rope 23.

[0056] By means of the support module 21, the gravity control module 22 and the tension traction rope 23, it is possible to apply an oblique pull-out force that meets the requirements on the test pile body 1, and the oblique pull-out force can be controlled. While ensuring the accuracy and effectiveness of the oblique pull-out test data, the construction cost of the tension providing device 2 is effectively reduced, thereby reducing the construction cost of the pile foundation oblique load test system and reducing the complexity of the pile foundation oblique load test system.

[0057] Optional, reference Figure 1 As shown, the support module 21 may include a fixed support body 211, a pulley 212 and a fixed support platform 213. Among them:

[0058] The fixed bracket body 211 may include at least one supporting foot and a supporting top. For example, the fixed bracket body 211 may be a triangular bracket, which may include three pillars, one end of the three pillars being fixedly connected at a certain angle, the other ends of the three pillars forming three supporting feet, and one end of the three pillars being fixedly connected forming a supporting top. It can be understood that in some embodiments, the fixed bracket body 211 may also be a square bracket, and the square bracket may be composed of a square frame and four pillars fixedly connected to the four corner points of the square frame and all on the same side, the four pillars forming four supporting feet, and the other side of the square frame being composed of four supporting arms, one end of the four supporting arms being fixedly connected to the four corner points of the square frame respectively, and the other end being fixedly connected to form a supporting top at the central raised position of the square frame. This example embodiment does not specifically limit the structure of the fixed bracket body 211.

[0059] The pulley 212 can be fixedly connected to the top of the support to support the tension traction rope 23; wherein, one end of the tension traction rope 23 can be fixedly connected to the test pile body 1, and pass around the pulley 212 and be fixedly connected to the gravity control module 22, so that the gravity control module 22 can be suspended on the fixed bracket body 211 through the tension traction rope 23 and the pulley 212.

[0060] The fixed support 213 can be used to be fixedly connected with the support foot, and is used to fix and support the fixed support body 211. For example, the fixed support 213 can be a concrete support, and a pit can be dug and cast on the test ground 5 to form a concrete support; the fixed support 213 can also be a prefabricated metal support, which is placed on the test ground 5 through a prefabricated metal support fixing device; it can be understood that in some embodiments, the fixed support 213 can also be fixedly connected to the support foot of the fixed support body 211, and this example embodiment does not specifically limit the type and installation method of the fixed support 213. A fixing pit or a connecting piece can be set on the fixed support 213, and the fixed support body 211 is fixed to the test ground 5 by fixing the support foot of the fixed support body 211 to the fixing pit or the connecting piece. This example embodiment does not specifically limit the fixed connection method between the fixed support 213 and the fixed support body 211.

[0061] The support module 21 can be realized by fixing the bracket body 211, the pulley 212 and the fixed support platform 213, which has a simple structure and low cost, and the support stability can be improved by fixing the bracket body 211 and the fixed support platform 213; at the same time, the pulley 212 can effectively reduce the wear of the tension traction rope 23, and combined with the tension traction rope 23, the vertical gravity generated by the gravity control module 22 can be effectively converted into an oblique pulling force on the test pile body 1, thereby improving the control stability of the oblique pulling force, thereby improving the accuracy of the oblique pulling test data to a certain extent.

[0062] Optional, reference Figure 1 As shown, the gravity control module 22 may include at least one gravity weight 221 and a bearing plate 222, wherein:

[0063] The gravity weight 221 can be a weight-controllable object used to control and adjust vertical gravity. For example, the gravity weight 221 can be a cast concrete block with a fixed weight, or a stone or brick with a fixed weight. This example embodiment does not specifically limit the type of the gravity weight 221.

[0064] The bearing plate 222 can be mainly used as a plate body for placing the gravity weights 221. When the number of gravity weights 221 placed on the bearing plate 222 is different, different vertical gravity is generated on the tension traction rope 23. For example, the bearing plate 222 can be a steel plate or a synthetic material plate, as long as it has a certain load-bearing capacity. This exemplary embodiment does not specifically limit the constituent material of the bearing plate 222. The bearing plate 222 can be a square plate or a circular plate, and this embodiment is not limited thereto.

[0065] The load-bearing plate 222 may include at least one connecting portion, through which the tension traction rope 23 may be fixedly connected to the load-bearing plate 222. For example, taking the load-bearing plate 222 as a square plate, the connecting portion may be a connecting hole on a plate corner of the load-bearing plate 222, or a connecting buckle or connecting ring fixedly connected to the load-bearing plate 222, and the present embodiment is not limited thereto.

[0066] The vertical gravity can be precisely controlled by the gravity weight 221 and the bearing plate 222 , which has a simple structure and low cost, and improves the control accuracy of the oblique pulling force, thereby improving the accuracy of the oblique pulling test data.

[0067] In an optional embodiment of the present application, the test pile body 1 may include a pile base body 11 and a pre-embedded pull-out anchor bolt 12. Wherein:

[0068] The pile body 11 can be buried below the test ground 5 , and the pre-buried pull anchor 12 can be arranged at one end of the pile body 11 close to the test ground 5 , and fixedly connected to one end of the tension traction rope 23 .

[0069] By arranging the pre-buried pull-out anchor bolt 12 on the pile basic body 11, the connection stability between the tension traction rope 23 and the test pile body 1 can be effectively improved, and the accuracy of the oblique pull-out test data can be improved.

[0070] In an optional embodiment of the present application, the support module 21 may further include a height adjustment device, one side of the height adjustment device is fixedly connected to the fixed support 213, and the other side of the height adjustment device is fixedly connected to the support foot, for adjusting the height of the fixed bracket body 211.

[0071] By providing a height adjustment device between the fixed bracket body 211 and the fixed support 213, the support height of each support foot of the fixed bracket body 211 can be adjusted, thereby effectively improving the stability of the support module 21, thereby improving the stability of the oblique pulling force applied by the tension traction rope 23 on the test pile body 1, and further improving the accuracy of the oblique pulling test data.

[0072] In an exemplary embodiment of the present application, the mobile load simulation device 3 may include a mobile load vehicle 31 and a load traction rope 32. Wherein:

[0073] The mobile load vehicle 31 can be used to provide dynamically variable mobile loads of different directions and sizes. For example, the mobile load vehicle can be a transport vehicle or a loading vehicle. Any vehicle that can provide strong traction and can flexibly adjust the direction can be used. This example embodiment does not specifically limit the vehicle type of the mobile load vehicle 31.

[0074] One end of the load traction rope 32 can be fixedly connected to the mobile load vehicle 31, and the other end can be fixedly connected to the tension traction rope 23 of the tension providing device 2; for example, the load traction rope 32 can be a steel wire rope or a synthetic fiber rope, as long as the load traction rope 32 has a high strength and a small degree of deformation. This example embodiment does not specifically limit the type of the load traction rope 32. The load traction rope 32 can be fixedly connected to the tension traction rope 23 and located at any position of the rope segment between the test pile body 1 and the pulley 212, for example, it can be the middle point of the rope segment, or it can be a position on the rope segment close to the test pile body 1. This example embodiment does not specifically limit the fixed connection point between the load traction rope 32 and the tension traction rope 23.

[0075] In an optional embodiment, the load traction rope 32 can be made of the same material as the tension traction rope 23, which can improve the uniformity and accuracy of the tension data collected on the load traction rope 32 and the tension traction rope 23, thereby ensuring the accuracy of the oblique pull test data.

[0076] The dynamically variable mobile load provided by the mobile load vehicle 31 can generate a load simulation pull-out force acting on the test pile body 1 through the oblique pull-out force on the load traction rope 32 and the tension traction rope 23. Through the mobile load vehicle 31 and the load traction rope 32, the load simulation pull-out force applied to the test pile body 1 can be accurately controlled and adjusted, and the load pull-out force generated by the lateral mobile load on the test pile body 1 under different conditions in the real application environment can be accurately simulated based on the pre-provided test scheme, thereby ensuring the accuracy and validity of the oblique pull-out test data.

[0077] In an exemplary embodiment of the present application, the data acquisition device 4 may include a plurality of dynamometer devices 41 and a plurality of monitoring elements 42. Among them:

[0078] A plurality of tension meter devices 41 may be respectively arranged on the tension traction rope 23 of the tension providing device 2 and on the load traction rope 32 of the mobile load simulation device 3, for real-time measurement and recording of tension test data on the tension traction rope 23 and the load traction rope 32; a tension meter device 41 may be arranged on each individual rope segment, for example, a tension meter device 41 may be respectively arranged on the tension traction rope 23 and on the rope segment between the fixed connection point of the test pile body 1 and the load traction rope 32, on the rope segment between the fixed connection point of the load traction rope 32 and the pulley 212, and on the rope segment between the pulley 212 and the bearing plate 222; of course, the tension meter device 41 may also be arranged at other positions or the number of the tension meter devices 41 may be determined according to the test requirements, and the present example embodiment is not limited thereto.

[0079] A plurality of monitoring elements 42 may be pre-buried on the side of the test pile body 1 away from the tension providing device 2, and used to measure and record in real time the pull-out test data of the pile side of the test pile body 1 and the nearby soil; for example, the monitoring element 42 may be set in the soil on the side of the test pile body 1 away from the tension providing device 2, and the monitoring element 42 may be set at a position adjacent to the test pile body 1 and at a position away from the test pile body 1. The pull-out test data refers to the monitoring data such as deformation, displacement, and pressure generated by the nearby soil when the test pile body 1 is subjected to a load simulating pull-out force.

[0080] By setting up multiple tensile force gauge devices 41 and multiple monitoring elements 42 to monitor all the pull-out data generated during the oblique load test of the pile foundation, the accuracy and timeliness of the oblique pull-out test data are further guaranteed, and the pull-out test data are recorded from multiple aspects to ensure the comprehensiveness and analyzability of the oblique pull-out test data, providing a basis for the calculation and design of the mechanical parameters of the oblique tension pile foundation in various real application scenarios.

[0081] In addition, a pile foundation oblique load test method is also provided in the embodiment of the present application, and the pile foundation oblique load test method can be applied to the pile foundation oblique load test system in the embodiment of the present application. Figure 2 As shown, the method may include:

[0082] Step S210, installing the pile foundation oblique load test system;

[0083] Step S220, dynamically adjusting the tension providing device in the pile foundation oblique load test system according to a preset test design scheme to control the oblique pulling force applied by the tension providing device to the test pile body in the pile foundation oblique load test system;

[0084] Step S230, dynamically controlling the dynamically variable movable load provided by the movable load simulation device in the pile foundation oblique load test system according to the test design scheme, so that the dynamically variable movable load and the oblique pull-out force generate a load-simulating pull-out force acting on the test pile body;

[0085] Step S240, measuring and recording the dynamic test data of the test pile body during the process of being subjected to the load simulating pull-out force by the data acquisition device.

[0086] In an exemplary embodiment of the present application, step S210 may be performed by Figure 3 The steps in the installation of the pile foundation oblique load test system are as follows. Figure 3 As shown, it may specifically include:

[0087] Step S310, drilling a pile placement hole to a designed depth in the soil layer of the test ground, and pre-burying the monitoring element in the data acquisition device in the soil layer;

[0088] Step S320, forming a test pile body with pre-embedded pull-out anchor bolts in the pile body installation hole;

[0089] Step S330, assembling the support module in the tension providing device, and installing the tension traction rope, so that one end of the tension traction rope is fixedly connected to the pre-buried pull anchor bolt, and the other end is fixedly connected to the gravity control module in the tension providing device, and the middle part of the tension traction rope is connected to the top of the support module, and the tension meter device in the data acquisition device is installed on the tension traction rope;

[0090] Step S340, fixedly connect one end of the load traction rope in the mobile load simulation device to the tension traction rope, and fixedly connect the other end of the load traction rope to the mobile load vehicle in the mobile load simulation device, and install the tension meter device on the load traction rope to complete the installation of the pile foundation oblique load test system.

[0091] For example, in some optional embodiments, Figure 4 The steps in the above are combined with the pile foundation oblique load test system to realize the oblique load test on the short pile foundation and collect the test data. Figure 4 As shown, the specific process is as follows:

[0092] Step S410: drilling: drilling in the soil layer to the designed depth, the hole diameter meets the design requirements of the test design scheme; Step S420: pre-embedded monitoring elements: pre-embed the corresponding monitoring elements according to the test scheme requirements; Step S430: pile formation: forming a test pile body with pre-embedded pull-out anchor bolts in the hole; Step S440: assembling the triangular bracket: assembling the triangular bracket on the ground, with a fixed support pad at the bottom and a pulley fixedly connected to the top; Step S450: installing the tension traction rope; one end of the tension traction rope is connected to the pre-embedded pull-out anchor bolt, and the other end is connected to the bearing plate through the pulley, and the tension meter equipment is installed on the tension traction rope; Step S460: adding Load gravity weights; load gravity weights on the load-bearing plate according to the design requirements of the test design plan; step S470: load mobile loads; connect the load traction rope equipped with a tension meter device to the tension traction rope between the tripod and the embedded pull-out anchor, and connect the other end of the load traction rope to the mobile load vehicle, and control the dynamic variable mobile load according to the test design plan, that is, control the traction force and traction direction of the mobile load vehicle; step S480: unload; unload the gravity weights and the dynamic variable mobile load according to the test design plan; step S490: record the test data; record the test data from step S460 to step S480 in real time.

[0093] The oblique load test method for pile foundation in the embodiment of the present application is used to realize the installation and test process of the oblique load test system for pile foundation, so as to quickly obtain the oblique load test data for pile foundation in various real application scenarios. And by applying an oblique pull-out force to the test pile body through a tension providing device, combined with a mobile load simulation device that provides a dynamically variable mobile load, the load simulation pull-out force on the test pile body in the real scene can be effectively simulated, so as to realize the experiment of the oblique load on the pile foundation, and effectively improve the accuracy and effectiveness of the oblique pull-out test data; the pull-out test data of the test pile body when subjected to the load simulation pull-out force can be measured and collected and recorded in real time through the data acquisition device, further ensuring the accuracy and timeliness of the oblique pull-out test data, and recording the pull-out test data from multiple aspects, ensuring the comprehensiveness and analyzability of the oblique pull-out test data, and providing a basis for the calculation and design of mechanical parameters of oblique tension pile foundations in various real application scenarios.

[0094] It should be understood that the present application does not limit its application to the detailed structure and arrangement of the components proposed in the present application. The present application can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present application. It should be understood that the present application disclosed and defined in the present application extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or the accompanying drawings. All these different combinations constitute multiple alternative aspects of the present application. The embodiments described in the present application illustrate the best mode known for implementing the present application and will enable those skilled in the art to utilize the present application.

Claims

1. A pile foundation oblique load test system, characterized in that: include: The test pile is buried below the test ground; A tension providing device, fixedly arranged above the test ground and spaced a predetermined distance from the test pile body, for applying an oblique pulling force to the test pile body; A moving load simulation device, connected to the tension providing device, for providing a dynamically variable moving load, so that the dynamically variable moving load and the oblique pulling force generate a load simulating pulling force acting on the test pile body; A data acquisition device, used for acquiring pull-out test data of the test pile body when it is subjected to the load-simulated pull-out force; Wherein, the mobile load simulation device comprises: Mobile load vehicles are used to provide dynamically variable mobile loads of different directions and sizes; A load traction rope, one end of which is fixedly connected to the mobile load vehicle, and the other end of which is fixedly connected to the tension traction rope of the tension providing device; The dynamically variable mobile load provided by the mobile load vehicle generates a load-simulating pull-out force acting on the test pile body through the oblique pull-out force on the load traction rope and the tension traction rope.

2. The pile foundation oblique load test system according to claim 1, characterized in that: The tension providing device comprises: Support module; Gravity control module; A tension traction rope, one end of which is fixedly connected to the test pile body, the other end of which is fixedly connected to the gravity control module, and the middle part of which is connected to the top of the support module, and the gravity control module is suspended from the support module through the tension traction rope; The gravity control module is used to control and adjust the vertical gravity so as to convert the vertical gravity into an oblique pulling force on the test pile body through the tension traction rope and the support module.

3. The pile foundation oblique load test system according to claim 2, characterized in that: The support module comprises: A fixed support body, comprising at least one support foot and a support top end; A pulley, fixedly connected to the top of the support, used to support and connect the tension traction rope; A fixed support platform is fixedly connected to the support foot and is used to support and fix the fixed bracket body.

4. The pile foundation oblique load test system according to claim 2, characterized in that: The gravity control module comprises: at least one gravity weight; A load-bearing plate, comprising at least one connecting portion, through which the tension traction rope is fixedly connected to the load-bearing plate, for placing the gravity weight; Wherein, when the number of the gravity weights placed on the bearing plate is different, different vertical gravity is generated on the tension traction rope.

5. The pile foundation oblique load test system according to claim 2, characterized in that: The test pile body comprises: The pile basic body is buried below the test ground; The pre-buried pull-out anchor bolt is arranged at one end of the pile basic body close to the test ground and is fixedly connected to one end of the tension traction rope.

6. The pile foundation oblique load test system according to claim 3, characterized in that: The support module also includes a height adjustment device, one side of which is fixedly connected to the fixed support platform, and the other side of which is fixedly connected to the support foot, for adjusting the height of the fixed bracket body.

7. The pile foundation oblique load test system according to claim 1, characterized in that: The data acquisition device comprises: A plurality of tension meter devices are respectively arranged on the tension traction rope of the tension providing device and the load traction rope of the mobile load simulation device, and are used for real-time measurement and recording of tension test data on the tension traction rope and the load traction rope; A plurality of monitoring elements are pre-buried on a side of the test pile body away from the tension providing device, and are used for real-time measurement and recording of the tensile test data of the pile side of the test pile body and the nearby soil.

8. A pile foundation oblique load test method, applied to the pile foundation oblique load test system according to any one of claims 1 to 7, characterized in that: The method comprises: Installing the pile foundation oblique load test system; Dynamically adjusting the tension providing device in the pile foundation oblique load test system according to a preset test design scheme to control the oblique pulling force applied by the tension providing device to the test pile body in the pile foundation oblique load test system; Dynamically controlling the dynamically variable moving load provided by the moving load simulation device in the pile foundation oblique load test system according to the test design scheme, so that the dynamically variable moving load and the oblique pull-out force generate a load-simulating pull-out force acting on the test pile body; The data acquisition device measures and records the dynamic test data of the test pile body during the process of being subjected to the load-simulated pull-out force.

9. The pile foundation oblique load test method according to claim 8, characterized in that: The installation of the pile foundation oblique load test system comprises: Drilling a pile placement hole to a designed depth in the soil layer of the test ground, and pre-burying the monitoring element of the data acquisition device in the soil layer; forming a test pile body with pre-embedded pull-out anchor bolts in the pile body placement hole; Assemble the support module in the tension providing device, and install the tension traction rope, so that one end of the tension traction rope is fixedly connected to the embedded pull anchor bolt, and the other end is fixedly connected to the gravity control module in the tension providing device, and the middle part of the tension traction rope is connected to the top of the support module, and the tension meter device in the data acquisition device is installed on the tension traction rope; One section of the load traction rope in the mobile load simulation device is fixedly connected to the tension traction rope, and the other end of the load traction rope is fixedly connected to the mobile load vehicle in the mobile load simulation device, and the tension meter device is installed on the load traction rope to complete the installation of the pile foundation oblique load test system.

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