High cantilever pile horizontal static load test method and device

Abstract

The invention discloses a high cantilever pile horizontal static load test method and device. The test comprises the following steps that a vertical loading assembly is installed between two test piles; installing a horizontal displacement measuring assembly between the two test piles and a reference pile, wherein the reference pile is located on an extension line of a connecting line of the two test piles; the static load tester is in control connection with the vertical loading assembly; a set loading instruction is sent to the vertical loading assembly through the static load tester, the vertical loading assembly is controlled to provide vertical force, and meanwhile the vertical force is equivalently converted into horizontal force acting on the test pile; on the contrary, the static load tester instructs the vertical loading assembly to unload, and the horizontal force acting on the test pile is unloaded at the same time; the static load tester is in data transmission connection with the horizontal displacement measuring assembly; the horizontal displacement measuring assembly converts the horizontal deformation of the test position into the deformation in the vertical direction and transmits the data to the static load tester to be recorded. The problems that in the prior art, a high cantilever pile horizontal test needs aloft work, the danger is large, the accuracy of a measurement result is not high, and operation is complex can be solved, and the test cost and the test operation intensity can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of pile foundation testing, and more particularly to a method and apparatus for horizontal static load testing of high cantilever piles. Background Technology

[0002] As is widely known, floating solar power and desert solar power generation have become common and actively promoted new energy power generation models in China due to their advantages such as high power generation and small land occupation. Pile-foundation fixed solar power stations are an important component of floating solar power and desert solar power stations.

[0003] Currently, the pile foundations of floating photovoltaic and desert photovoltaic power stations mostly adopt high cantilever piles, that is, using Φ300mm~Φ400mm prestressed pipe piles, with the top of the pile 3~6 meters away from the ground / water surface; the basic design layout of the pile foundation is: arranged in rectangular rows with a pile spacing of about 4 meters.

[0004] The results of horizontal load tests on pile foundations are crucial design parameters and essential evidence for determining the quality of the pile foundation. In existing technologies, horizontal static load tests on high cantilever piles typically involve constructing a test platform (high-altitude connection) approximately 0.5m below the pile top using scaffolding between two test piles. Personnel on the test platform use rigging, force gauges, and hand-operated hoists to connect the two test piles at a predetermined pile top position, forming a "horizontal load application-release" device. Reference piles are then placed approximately 0.5m away from the test piles on the outer side of the test load direction. The test process is as follows: 2-3 personnel on the test platform perform "loading-unloading" on the test piles according to the horizontal test requirements; one person uses a hand-operated hoist to apply loads and unload the test piles at a certain frequency and load requirements; the other two personnel measure and record the horizontal displacement of the test piles and reference piles under each load level and cycle until the test is completed.

[0005] The existing techniques for horizontal static load testing of high cantilever piles often have the following problems:

[0006] 1. Safety issues: Insufficient platform stability and sudden breakage of the pile under load can directly endanger the personal safety of test personnel.

[0007] 2. Test accuracy issues: Insufficiently established test benchmarks and unavoidable errors in manual measurement can both lead to reduced test accuracy.

[0008] 3. High cost and low efficiency: The process of building the platform and conducting manual testing throughout the entire process wastes a lot of time and manpower.

[0009] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0010] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a method and apparatus for horizontal static load testing of high cantilever piles, which is not only simple and convenient to operate, improving work efficiency and saving significant time and costs, but also enhances test accuracy and operational safety.

[0011] A horizontal static load test method for a high cantilever pile according to the present invention includes the following steps:

[0012] The vertical loading component was installed between the two test piles;

[0013] The horizontal displacement measuring device is installed between two test piles and one reference pile, wherein the reference pile is located on the extension line of the line connecting the two test piles;

[0014] Connect the static load tester to the vertical loading assembly control system; send a set loading command to the vertical loading assembly through the static load tester to control the vertical loading assembly to provide vertical force, and at the same time convert the vertical force into an equal amount of horizontal force acting on the test pile; conversely, the static load tester commands the vertical loading assembly to unload, and at the same time remove the horizontal force acting on the test pile.

[0015] The static load tester is connected to the horizontal displacement measuring component for data transmission; the horizontal displacement measuring component converts the horizontal deformation at the test location into vertical deformation and transmits the data to the static load tester for recording.

[0016] The horizontal static load test of high cantilever piles, conducted using the aforementioned experimental method, achieves remote control of the "loading-unloading-recording" test process via a static load testing instrument. This invention ensures safe and convenient operation, overcoming the drawbacks of manual operation on an aerial platform. It reduces the impact of operator movement on the displacement gauge and the instability caused by excessively long reference piles on the aerial work platform. The automated testing process avoids human error and ensures data traceability. This results in highly reliable test results, reducing errors caused by human factors and improving the credibility of the test results. It also reduces the time required to set up the aerial work platform, overcomes the problems of fully manual operation, automates the testing process, improves work efficiency, and saves labor and time costs.

[0017] According to the present invention, a horizontal static load test device for high cantilever piles includes two test piles and a reference pile arranged along the same straight line, wherein the second test pile is located at the middle position between the first test pile and the reference pile;

[0018] A vertical loading assembly connected to a static load tester is provided between the first test pile and the second test pile. The vertical loading assembly is configured to convert the provided vertical force into a horizontal force on the test pile.

[0019] A horizontal displacement measuring component connected to a static load tester is installed between the first test pile, the second test pile, and the reference pile. The horizontal displacement measuring component is configured to convert the horizontal deformation of the pile to be measured into the vertical deformation measured at the bottom of the pile.

[0020] With the aid of the above-mentioned testing apparatus, this invention can reduce manpower and time costs. Reliable testing and measurement equipment and control methods avoid human measurement errors and enhance the accuracy of high cantilever pile horizontal tests. This invention eliminates the need for building high-altitude platforms and uses engineering piles as reference piles, which significantly improves the stability of the reference compared to the original horizontal test method. It also reduces errors caused by human factors on high-altitude work platforms, thereby reducing manpower and time costs and enhancing the accuracy of high cantilever pile horizontal tests. This invention solves the problems of existing technologies where high cantilever pile horizontal tests require high-altitude operations, are highly dangerous, have low measurement accuracy, and are complex to operate.

[0021] According to some embodiments of the present invention, the vertical loading assembly includes a force-transmitting pulley assembly, a force-transmitting steel rope drum assembly, and a hydraulic jacking assembly;

[0022] The force transmission pulley assembly is fixedly connected to the top of the first test pile, and the force transmission steel rope drum assembly is fixedly connected to the top of the second test pile. The force transmission steel rope drum assembly has a force transmission steel wire rope.

[0023] The hydraulic jacking assembly is fixedly connected to the first test pile. The force transmission steel wire rope passes through the force transmission pulley assembly and is connected to the hydraulic jacking assembly. A force sensor is fixedly connected between the force transmission steel wire rope and the hydraulic jacking assembly. The hydraulic jacking assembly is connected to the static load tester.

[0024] According to some embodiments of the present invention, the horizontal displacement measuring assembly includes a first guide single pulley assembly, a second guide single pulley assembly, and a guide double pulley assembly respectively disposed at the same height positions of the first test pile, the second test pile, and the reference pile;

[0025] A first pull-wire displacement meter is installed on the first test pile, below the first guide single pulley assembly; a second pull-wire displacement meter is installed on the second test pile, below the second guide single pulley assembly; and a measuring rope release and release lock assembly is installed on the benchmark pile, below the guide double pulley assembly.

[0026] The rope take-up and release lock assembly is connected to the first pull-wire displacement meter via the first displacement measuring rope passing through the first guide single pulley assembly, and the rope take-up and release lock assembly is connected to the second pull-wire displacement meter via the second displacement measuring rope passing through the second guide single pulley assembly.

[0027] Both the first and second wire-type displacement gauges are connected to the static load tester for data transmission.

[0028] According to some embodiments of the present invention, a first rope weight guide tube is further provided between the first displacement measuring rope and the first pull-wire displacement gauge. The first rope weight guide tube is fixedly connected to the first test pile, and the first displacement measuring rope weight of the first displacement measuring rope passes through the first rope weight guide tube and is connected to the first pull-wire displacement gauge pull wire of the first pull-wire displacement gauge.

[0029] A second rope guide tube is also provided between the second displacement measuring rope and the second pull-wire displacement gauge. The second rope guide tube is fixedly connected to the second test pile. The second displacement measuring rope weight passes through the second rope guide tube and is connected to the pull wire of the second pull-wire displacement gauge.

[0030] According to some embodiments of the present invention, the hydraulic jacking assembly includes a long-stroke jack and a hydraulic pump station connected by oil pipes; a static load tester is controlled and connected to the hydraulic pump station to control the long-stroke jack to perform quantitative automatic loading and unloading.

[0031] According to some embodiments of the present invention, the reference pile is configured as an adjacent pile located on the extension line of the line connecting the two test piles.

[0032] Additional aspects and advantages of the invention 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 invention. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Figure 1 This is a schematic diagram of some embodiments of a horizontal static load test device for high cantilever piles according to the present invention.

[0035] Meaning of the labels in the attached diagram:

[0036] 1-First test pile;

[0037] 2-Second test pile;

[0038] 3-Benchmark pile;

[0039] 4-Vertical loading of components;

[0040] 41-Force transmission pulley assembly;

[0041] 42-Force transmission steel rope drum assembly; 421-Force transmission steel wire rope;

[0042] 43-Hydraulic jacking assembly; 431-Long stroke jack; 432-Hydraulic pump station; 4321-Oil pipe;

[0043] 44 - Force sensor;

[0044] 5-Horizontal displacement measuring component;

[0045] 51-First guide single pulley assembly;

[0046] 52-Second guide single pulley assembly;

[0047] 53-Guide double pulley assembly;

[0048] 54-First draw-wire displacement gauge; 541-Draw-wire of the first draw-wire displacement gauge;

[0049] 55-Second draw-wire displacement gauge; 551-Draw-wire of the second draw-wire displacement gauge;

[0050] 56- Rope release and take-up lock assembly; 561- First displacement measuring rope; 5611- First displacement measuring rope weight; 562- Second displacement measuring rope; 5621- Second displacement measuring rope weight;

[0051] 57-First rope guide tube;

[0052] 58-Second rope guide tube;

[0053] 6-Static load tester. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0055] The following is based on Figure 1 A detailed description of a horizontal static load test device for high cantilever piles according to the present invention is provided.

[0056] Please refer to Figure 1 The present invention provides a horizontal static load test device for a high cantilever pile, including a test pile, a reference pile 3, a vertical loading component 4, a horizontal displacement measuring component 5, and a static load tester 6.

[0057] Two test piles and one reference pile 3 are arranged along the same straight line, with the second test pile 2 located midway between the first test pile 1 and the reference pile 3. A vertical loading assembly 4 is positioned between the first test pile 1 and the second test pile 2 and connected to a static load tester 6. This assembly provides vertical force to the test piles and converts this vertical force into a horizontal force on the test piles, solving the problem of difficulty in directly horizontally supporting jacks. This assembly is used to complete automated and quantitative horizontal load tests. A horizontal displacement measuring assembly 5 is positioned between the first test pile 1, the second test pile 2, and the reference pile 3 and connected to the static load tester 6. This assembly converts the horizontal deformation of the test piles to be measured into a vertical deformation that is easily measured at the pile bottom.

[0058] In related technologies, the horizontal static load test position of high cantilever piles is located at a high altitude, and the direct application of horizontal loads must be completed at a high altitude. This common practice requires the construction of a high-altitude platform, and a reference pile needs to be manually driven near the test pile. This not only introduces errors caused by human error and instability of the reference pile, but also poses a safety hazard of falling during high-altitude operations.

[0059] In contrast, this invention utilizes the indirect measurement of converting horizontal force into vertical force and horizontal deformation into vertical deformation. This allows for ground-based operations, reducing safety risks and errors caused by manual counting on aerial work platforms. Furthermore, it allows engineering piles to serve as reference piles, which are more reliable than manually driven reference piles. Specifically, the technical effects of this invention, based on measuring the vertical deformation after horizontal deformation conversion, include at least the following:

[0060] 1. It avoids the problem of difficulty in directly measuring horizontal displacement in conventional methods. This problem requires the use of two rigid reference beams of appropriate length. During operation, one end of the two reference beams needs to be fixed at an appropriate position on the reference pile, and the other end needs to be kept horizontally sliding at the horizontal displacement measurement positions of the two test piles. Then, the displacement gauge is placed at an appropriate position on the reference beam to complete the direct measurement of horizontal displacement.

[0061] 2. Using the "horizontal displacement vertical vector measurement method", 1) the "displacement measuring rope (pull wire)" which is easy to install can replace the "base beam" which is inconvenient to install; 2) it is easy to use the gravity of the "measuring rope weight" to give the measuring rope a certain tension, and then use the "guide tube" to constrain the swing of the "rope weight", effectively controlling the influence of wind on displacement measurement and ensuring measurement accuracy.

[0062] Please continue to refer to Figure 1 The vertical loading component 4 in this embodiment of the invention may include a force transmission pulley assembly 41, a force transmission steel rope drum assembly, a hydraulic lifting assembly 43, and a force sensor 44.

[0063] The force transmission pulley assembly 41 is fixedly connected to the top of the first test pile 1, the force transmission steel rope drum assembly is fixedly connected to the top of the second test pile 2, and the force transmission steel rope drum assembly has a force transmission steel wire rope 421; the hydraulic jacking assembly 43 is fixedly connected to the first test pile 1, the force transmission steel wire rope 421 passes through the force transmission pulley assembly 41 and is connected to the hydraulic jacking assembly 43, the force sensor 44 is fixedly connected between the force transmission steel wire rope 421 and the hydraulic jacking assembly 43, and the hydraulic jacking assembly 43 is connected to the static load tester 6.

[0064] Understandably, the structure of the force transmission steel rope drum assembly is a cylindrical component with wound steel wire. It can adapt to different pile spacing test conditions by winding and unwinding the force transmission steel rope 421 in a cylindrical manner.

[0065] Please continue to refer to Figure 1The horizontal displacement measuring component 5 of this embodiment may include a first guide single pulley assembly 51, a second guide single pulley assembly 52, and a guide double pulley assembly 53 respectively disposed at the same height positions of the first test pile 1, the second test pile 2, and the reference pile 3; a first pull-wire displacement meter 54 is provided on the first test pile 1 below the first guide single pulley assembly 51, a second pull-wire displacement meter 55 is provided on the second test pile 2 below the second guide single pulley assembly 52, and a measuring rope take-up and release lock assembly 56 is provided on the reference pile 3 below the guide double pulley assembly 53; the measuring rope take-up and release lock assembly 56 is connected to the first pull-wire displacement meter 54 through the first displacement measuring rope 561 passing through the first guide single pulley assembly 51, and the measuring rope take-up and release lock assembly 56 is connected to the second pull-wire displacement meter 55 through the second displacement measuring rope 562 passing through the second guide single pulley assembly 52; both the first pull-wire displacement meter 54 and the second pull-wire displacement meter 55 are connected to the static load tester 6 for data transmission.

[0066] More specifically, the first wire displacement gauge 54 and the second wire displacement gauge 55 can be installed on the first test pile 1 and the second test pile 2 respectively through the first wire displacement gauge 54 fixing component and the second wire displacement gauge 55 fixing component; the first rope guide tube 57 and the second rope guide tube 58 can be installed at corresponding positions on the first test pile 1 and the second test pile 2 respectively through the first guide fixing component and the second guide fixing component.

[0067] In practice, the combined use of the wire displacement meter, displacement measuring rope, measuring rope release and take-up lock assembly 56, guide single pulley assembly and guide double pulley assembly 53 can convert the horizontal deformation at the test position into vertical deformation, which is measured by the wire displacement meter and wirelessly transmitted to the matching static load tester 6 for recording.

[0068] Please continue to refer to Figure 1 In order to assist in the accurate measurement of displacement and loading force, in a further preferred embodiment of the present invention, a first rope drop guide tube 57 is provided between the first displacement measuring rope 561 and the first pull-wire displacement meter 54, and a second rope drop guide tube 58 is provided between the second displacement measuring rope 562 and the second pull-wire displacement meter 55.

[0069] The first rope guide tube 57 is fixedly connected to the first test pile 1, and the first displacement measuring rope 5611 of the first displacement measuring rope 561 passes through the first rope guide tube 57 and is connected to the first pull-wire displacement gauge pull wire 541 of the first pull-wire displacement gauge 54; the second rope guide tube 58 is fixedly connected to the second test pile 2, and the second displacement measuring rope 5621 of the second displacement measuring rope 562 passes through the second rope guide tube 58 and is connected to the second pull-wire displacement gauge pull wire 551 of the second pull-wire displacement gauge 55.

[0070] Please continue to refer to Figure 1 The hydraulic lifting assembly 43 of this embodiment may include a long-stroke jack 431 and a hydraulic pump station 432 connected by an oil pipe 4321; the static load tester 6 is controlled and connected to the hydraulic pump station 432 to control the long-stroke jack 431 to perform quantitative automatic loading and unloading.

[0071] It should be noted that the long-stroke jack 431 mainly refers to a jack with a large working stroke, which can be directly obtained through procurement. More specifically, the long-stroke jack 431 can be fixedly connected to the first test pile 1 through a top-to-pile connector and a top-to-pile connector. The top-to-pile connector and the top-to-pile connector are arranged at intervals along the axial direction on the pile body of the test pile. The structure of the top-to-pile connector and the top-to-pile connector is a device used to fix the jack to the pile, referred to as a connector.

[0072] In practice, the static load tester 6 sends a pre-set loading wireless signal command to the hydraulic oil pump. Upon receiving the command, the hydraulic oil pump automatically changes the oil supply and return direction via its built-in electromagnetic directional valve, outputting pressurized oil to the long-stroke jack 431, which acts as a hydraulic actuator. When oil enters the upper oil chamber of the long-stroke jack 431 fixed to the pile and returns to the lower oil chamber, the piston rod moves downward, pulling the force sensor 44 and the force transmission wire rope 421 downward and tightening them. This, through the force transmission pulley assembly 41, converts the vertical force exerted by the jack into an equal amount of horizontal force acting on the test pile. Conversely, the unloading command from the static load tester controls the oil pump to enter the lower oil chamber of the long-stroke jack 431 fixed to the pile and return to the upper oil chamber, causing the piston rod to move upward and loosening the previously tightened force transmission wire rope 421, thus releasing the horizontal force acting on the test pile. This cycle repeats, achieving automatic quantitative horizontal loading and unloading.

[0073] The present invention provides a horizontal static load test device for high cantilever piles, which solves the problems of high-altitude operation, high risk, low accuracy of measurement results, and complex operation in the prior art. It reduces manpower and time costs and enhances the accuracy of horizontal tests for high cantilever piles.

[0074] In a further preferred embodiment of the present invention, the reference pile 3 is configured as an adjacent pile located on the extension line of the line connecting the two test piles.

[0075] By using the vertical loading component 4 and the horizontal displacement measuring component 5, which are in the form of a "wire-pulley" structure, adjacent piles are used as reference piles 3, ensuring the reliability of the reference.

[0076] In this embodiment of the invention, the top-to-pile upper connector, the top-to-pile lower connector, the guide fixing component, the displacement fixing component, and the rope guide tube are integrated with the supporting fixing device of the test device of the present invention, which can improve the reliability and stability of the loading and displacement measurement process, and all play a role in assisting to achieve more accurate measurement of displacement and loading force.

[0077] This invention also provides a method for horizontal static load testing of high cantilever piles, comprising the following steps:

[0078] Install the vertical loading component 4 between the two test piles;

[0079] The horizontal displacement measuring component 5 is installed between two test piles and a reference pile 3, wherein the reference pile 3 is located on the extension line of the line connecting the two test piles;

[0080] The static load tester 6 is connected to the vertical loading component 4. The static load tester 6 sends a set loading command to the vertical loading component 4 to control the vertical loading component 4 to provide vertical force, and at the same time convert the vertical force into an equal amount of horizontal force acting on the test pile. Conversely, the static load tester commands the vertical loading component 4 to unload, and at the same time removes the horizontal force acting on the test pile.

[0081] The static load tester 6 is connected to the horizontal displacement measuring component 5 for data transmission; the horizontal deformation at the test position is converted into vertical deformation through the horizontal displacement measuring component 5 and the data is transmitted to the static load tester 6 for recording.

[0082] In a more specific implementation, a horizontal static load test method for a high cantilever pile according to an embodiment of the present invention may include the following working process:

[0083] After determining the two test piles, the pile on the same straight line as the two test piles should be selected as the reference pile 3. After the reference pile 3 is determined, the force transmission pulley assembly 41 is installed on the top of the first test pile 1, and the force transmission steel wire rope 421 drum assembly 42 is installed on the top of the second test pile 2. The force transmission steel wire rope 421 is pulled out from the force transmission steel wire rope 421 assembly and connected to the force sensor 44 through the force transmission pulley assembly 41. The force sensor 44 is connected to the long stroke jack 431. After the position of the long stroke jack 431 is determined, the long stroke jack 431 is fixedly connected to the first test pile 1.

[0084] After determining the horizontal displacement acquisition position, the first guide single pulley assembly 51 and the second guide single pulley assembly 52 are respectively installed at appropriate positions on the first test pile 1 and the second test pile 2 (that is, the positions for test data acquisition); then the guide double pulley assembly 53 is installed on the reference pile 3 at an appropriate position at the same height as the first guide single pulley assembly 51 / second guide single pulley assembly 52; the measuring rope release and take-up lock assembly 56 is fixed at a convenient operation position at the bottom of the reference pile 3; the first pull-wire displacement meter 54 and the second pull-wire displacement meter 55 are respectively fixed on the first test pile 1 and the second test pile 2; then the corresponding first rope drop guide tube 57 and the second rope drop guide tube 58 are fixed at the corresponding positions on the first test pile 1 and the second test pile 2 through the guide fixing device;

[0085] The first displacement measuring rope 561 is connected to the first displacement measuring rope weight 5611 passing through the first rope weight guide tube 57 via the first guide single pulley assembly 51 and the guide double pulley assembly 53, respectively. At the same time, the second displacement measuring rope 562 is connected to the second displacement measuring rope weight 5621 passing through the second rope weight guide tube 58 via the second guide single pulley assembly 52 and the guide double pulley assembly 53, respectively. After connection, the displacement measuring rope weight and the pull wire of the pull-wire displacement meter are connected to the corresponding pull-wire displacement meter. That is, the first displacement measuring rope weight 5611 is connected to the first pull-wire displacement meter 54 via the pull wire 541 of the first pull-wire displacement meter, and the second displacement measuring rope weight 5621 is connected to the second pull-wire displacement meter 55 via the pull wire 551 of the second pull-wire displacement meter.

[0086] Finally, the hydraulic pump station 432 is connected to the long-stroke jack 431 with a hydraulic oil pipe 4321. After the connection, the long-stroke jack 431 can be controlled by the static load tester 6 to achieve quantitative automatic loading and unloading, and to obtain accurate deformation displacement data in real time.

[0087] Practical application has verified that the above-described process of this invention is safe, convenient, and highly reliable, improving the credibility of the test results, increasing work efficiency, and saving manpower and time costs.

[0088] In summary, the horizontal static load test method and apparatus for high cantilever piles provided by the embodiments of the present invention have at least the following advantages compared with the prior art:

[0089] 1. After installation, testers can remotely set and control the instruments to complete the test, which greatly reduces the labor intensity of testers, avoids safety risks, improves efficiency, and reduces costs.

[0090] 2. The entire test process is completed automatically, which improves the accuracy of the test and ensures the reliability of the test results.

[0091] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0093] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0094] The above examples illustrate experimental methods and apparatus for simultaneously testing two test piles. However, they are merely descriptions of preferred embodiments of the present invention and are not intended to define the scope of the invention. Without departing from the spirit of the invention, all types and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for horizontal static load testing of high cantilever piles, characterized in that, The experimental method includes the following steps: The vertical loading component was installed between the two test piles; The horizontal displacement measuring device is installed between two test piles and one reference pile, wherein the reference pile is located on the extension line of the line connecting the two test piles; Connect the static load tester to the vertical loading assembly control system; send a set loading command to the vertical loading assembly through the static load tester to control the vertical loading assembly to provide vertical force, and at the same time convert the vertical force into an equal amount of horizontal force acting on the test pile; conversely, the static load tester commands the vertical loading assembly to unload, and at the same time remove the horizontal force acting on the test pile. The static load tester is connected to the horizontal displacement measuring component for data transmission; the horizontal displacement measuring component converts the horizontal deformation at the test location into vertical deformation and transmits the data to the static load tester for recording.

2. A horizontal static load testing device for high cantilever piles used in the horizontal static load testing method as described in claim 1, characterized in that, It includes two test piles and one reference pile arranged along the same straight line, with the second test pile located midway between the first test pile and the reference pile; A vertical loading assembly connected to a static load tester is provided between the first test pile and the second test pile. The vertical loading assembly is configured to convert the provided vertical force into a horizontal force on the test pile. A horizontal displacement measuring component connected to a static load tester is provided between the first test pile, the second test pile, and the reference pile. The horizontal displacement measuring component is configured to convert the horizontal deformation of the pile to be measured into the vertical deformation measured at the bottom of the pile.

3. The horizontal static load test device for high cantilever piles according to claim 2, characterized in that, The vertical loading assembly includes a force-transmitting pulley assembly, a force-transmitting steel rope drum assembly, and a hydraulic lifting assembly. The force-transmitting pulley assembly is fixedly connected to the top of the first test pile, and the force-transmitting steel rope drum assembly is fixedly connected to the top of the second test pile. The force-transmitting steel rope drum assembly has a force-transmitting steel wire rope. The hydraulic jacking assembly is fixedly connected to the first test pile. The force transmission steel wire rope passes through the force transmission pulley assembly and is connected to the hydraulic jacking assembly. A force sensor is fixedly connected between the force transmission steel wire rope and the hydraulic jacking assembly. The hydraulic jacking assembly is connected to a static load tester.

4. The horizontal static load test device for high cantilever piles according to claim 3, characterized in that, The horizontal displacement measuring component includes a first guide single pulley assembly, a second guide single pulley assembly, and a guide double pulley assembly, which are respectively set at the same height positions of the first test pile, the second test pile, and the reference pile. A first pull-wire displacement meter is installed on the first test pile below the first guide single pulley assembly; a second pull-wire displacement meter is installed on the second test pile below the second guide single pulley assembly; and a measuring rope release and take-up lock assembly is installed on the benchmark pile below the guide double pulley assembly. The rope take-up and release lock assembly is connected to the first pull-wire displacement meter via a first displacement measuring rope passing through a first guide single pulley assembly, and the rope take-up and release lock assembly is connected to the second pull-wire displacement meter via a second displacement measuring rope passing through a second guide single pulley assembly. Both the first and second wire-type displacement gauges are connected to the static load tester for data transmission.

5. The horizontal static load test device for high cantilever piles according to claim 4, characterized in that, A first rope drop guide tube is also provided between the first displacement measuring rope and the first pull-wire displacement gauge. The first rope drop guide tube is fixedly connected to the first test pile. The first displacement measuring rope drop of the first displacement measuring rope passes through the first rope drop guide tube and is connected to the first pull-wire displacement gauge pull line of the first pull-wire displacement gauge. A second rope guide tube is also provided between the second displacement measuring rope and the second pull-wire displacement gauge. The second rope guide tube is fixedly connected to the second test pile. The second displacement measuring rope weight of the second displacement measuring rope passes through the second rope guide tube and is connected to the second pull-wire displacement gauge pull line of the second pull-wire displacement gauge.

6. The horizontal static load test device for high cantilever piles according to claim 3, characterized in that, The hydraulic jacking assembly includes a long-stroke jack and a hydraulic pump station connected by oil pipes; the static load tester is controlled and connected to the hydraulic pump station to control the long-stroke jack to perform quantitative automatic loading and unloading.

7. A horizontal static load test device for high cantilever piles according to any one of claims 2 to 6, characterized in that, The reference piles are configured as adjacent piles located on the extension line of the line connecting the two test piles.

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