A method for testing the uplift bearing capacity of a retarding coagulation prestressed uplift pile

Abstract

The application discloses a method for testing the uplift bearing capacity of a slow-setting prestressed uplift pile, and aims to provide a method for testing the uplift bearing capacity of a slow-setting prestressed uplift pile, which can accurately and effectively evaluate the uplift bearing capacity of the slow-setting prestressed uplift pile. The method comprises the following steps in sequence: first, fixing the steel strand of the slow-setting prestressed uplift pile on a cross beam; second, lifting the cross beam upward by a jack, so that the jack applies an uplift force on the steel strand of the slow-setting prestressed uplift pile through the cross beam; after the uplift force applied on the steel strand by the jack reaches a set value F1, the jack keeps the state; third, fixing the steel bar of the slow-setting prestressed uplift pile on the cross beam; fourth, the jack continues to load and lifts the cross beam upward, so that the jack applies an uplift force on the steel strand and the steel bar of the slow-setting prestressed uplift pile through the cross beam, until the jack loads to a set value F2 or until the slow-setting prestressed uplift pile is damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of uplift pile, in particular to a method for testing the uplift bearing capacity of a slow-setting prestressed uplift pile. BACKGROUND

[0002] The uplift pile in the building is used to bear the buoyancy of underground water in the foundation. Since the compressive performance of concrete is much greater than the tensile performance, the decisive factor of the cost of the uplift pile is often the pile body crack, and the utilization rate of the steel bar in the pile is generally less than 50%. In order to improve the anti-floating efficiency and effectively control the pile body crack of the uplift pile, some inventors have developed "slow-setting prestressed cast-in-place pile for uplift and method", for example, the slow-bond prestressed uplift pile connecting device and its construction method of Chinese patent 202111131082X. The pile type is composed of concrete, ordinary steel bar and slow-setting prestressed tendon, and the slow-setting prestressed tendon includes steel strand and sleeve pipe sleeved outside the steel strand.

[0003] When the inventors promote and apply the slow-setting prestressed uplift pile, the following problems are found. Since the slow-setting prestressed uplift pile is a new pile type, according to the provisions of article 3.1.2 of "Technical Code for Testing Building Foundation Pile" JGJ106-2014, single pile vertical uplift static load test must be carried out before construction. In the conventional single pile vertical uplift static load test of the uplift pile, the steel bar in the uplift pile is generally welded to the side wall of the test pile device, and the jack applies upward pulling force (i.e. jacking force) to the inner steel bar in the uplift pile through the jacking beam, so as to test the single pile ultimate bearing capacity of the uplift pile. The test pile equipment is simple and effective in application in the conventional uplift pile, and is easy to operate. However, when it is applied in the slow-setting prestressed uplift pile, the following problems exist,

[0004] Since the steel strand in the slow-setting prestressed tendon cannot be welded, in the current single pile vertical uplift static load test method, the steel bar is welded and fixed on the beam, and the upward pulling force provided by the jack will be entirely borne by the ordinary steel bar, while the vertical bearing capacity of the slow-setting prestressed uplift pile is borne by the ordinary steel bar and the slow-setting prestressed tendon. Therefore, if the conventional test pile device is used to carry out the single pile vertical uplift static load test on the slow-setting prestressed uplift pile, the result will inevitably be that the steel bar is pulled off, and the uplift bearing capacity of the slow-setting prestressed uplift pile cannot be effectively evaluated.

[0005] On the other hand, in the single pile vertical pull-out static load test method, if the steel strand is fixed to the beam by other fixed structures so that the steel strand and the steel bar are fixed to the beam together for the single pile vertical pull-out static load test, the following problems will still exist. Since the steel strand in the slow-setting prestressed reinforcement is provided with a jacket, the steel strand is separated from the concrete pile, and the steel strand will produce a large elongation when it is pulled, while the elongation of the steel bar when it is pulled is extremely small; therefore, during the test, the pull-out force provided by the jack will still be almost borne by the ordinary steel bar, and the steel strand will still find it difficult to bear the pull-out force provided by the jack. Therefore, the result will inevitably be that the steel bar is broken, and it is impossible to effectively evaluate the pull-out bearing capacity of the slow-setting prestressed pull-out pile. Summary of the Invention

[0006] The purpose of the present invention is to provide a method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile, which can accurately and effectively evaluate the pull-out bearing capacity of the slow-setting prestressed pull-out pile.

[0007] The technical solution of the present invention is:

[0008] A method for testing the pullout bearing capacity of a slow-setting prestressed pullout pile is disclosed. The method uses a pile test device to test the pullout bearing capacity of the slow-setting prestressed pullout pile. The pile test device includes a beam and a jack for lifting the beam. The slow-setting prestressed pullout pile includes a steel strand and steel bars. The method for testing the pullout bearing capacity of the slow-setting prestressed pullout pile includes the following steps:

[0009] First, fix the steel strands of the slow-setting prestressed anti-pullout piles to the beams;

[0010] Second, the beam is lifted upward by the jack, so that the beam exerts an upward pulling force on the steel strand of the slow-setting prestressed anti-pullout pile. After the upward pulling force exerted by the jack on the steel strand reaches the set value F1, the jack maintains this state;

[0011] Third, fix the steel bars of the slow-setting prestressed anti-pullout piles to the beams;

[0012] Fourth, the jack continues to load and lifts the crossbeam upward, thereby applying an upward pull force on the steel strands and steel bars of the slow-setting prestressed pull-out pile through the crossbeam, so that the steel strands and steel bars of the slow-setting prestressed pull-out pile can jointly bear the upward pull force applied by the jack until the jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed.

[0013] In the second step of the pull-out bearing capacity testing method of the slow-setting prestressed pull-out pile of the present scheme, a pull-out force is first applied to the steel strand by a jack, so that the steel strand is first stressed and stretched, and after the pull-out force applied to the steel strand by the jack reaches a set value F1, it is stretched first; thereafter, the steel bars of the slow-setting prestressed pull-out pile are fixed on the crossbeam, and the loading is continued by the jack in the fourth step, so that the steel strand and the steel bars of the slow-setting prestressed pull-out pile jointly bear the pull-out force applied by the jack, until the jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed, thereby effectively improving the accuracy of the pull-out bearing capacity test of the slow-setting prestressed pull-out pile, and thus being able to accurately and effectively evaluate the pull-out bearing capacity of the slow-setting prestressed pull-out pile.

[0014] Preferably, in the first step, the steel strands of the slow-setting prestressed anti-pullout piles are fixed to the beams via anchors. In this way, the steel strands can be stably and reliably fixed to the beams via the anchors, and can be easily disassembled.

[0015] Preferably, in the third step, the steel bars of the slow-setting prestressed anti-pullout piles are fixed to the beams by welding or anchors. Welding the steel bars secures them stably and reliably to the beams. Anchoring the steel bars secures them stably and reliably to the beams while facilitating removal.

[0016] Preferably, the pile test equipment further comprises an anchor pile, which is anchored into the ground and used to support a jack, and the jack is supported on the top surface of the anchor pile.

[0017] A method for testing the pullout bearing capacity of a slow-setting prestressed pullout pile, wherein the slow-setting prestressed pullout pile includes a steel strand and steel bars. The method uses a pile test device to test the pullout bearing capacity of the slow-setting prestressed pullout pile, wherein the pile test device includes a steel bar fixing beam, a steel strand fixing beam located above the steel bar fixing beam, a first jack located between the steel bar fixing beam and the steel strand fixing beam, and a second jack for lifting the steel bar fixing beam, wherein the first jack is used to lift the steel strand fixing beam. The method for testing the pullout bearing capacity of the slow-setting prestressed pullout pile includes the following steps in sequence:

[0018] First, fix the steel strands of the slow-setting prestressed anti-pullout piles on the steel strand fixing beams;

[0019] Fix the steel bars of the slow-setting prestressed anti-pullout piles on the steel bar fixing beams;

[0020] Second, the first jack is loaded, and the steel strand fixing beam is lifted up by the first jack, thereby applying an upward pull force to the steel strands of the slow-setting prestressed pull-out pile through the steel strand fixing beam, so that the steel strands of the slow-setting prestressed pull-out pile are stressed and elongated first. After the upward pull force applied to the steel strand by the first jack reaches the set value F1, the first jack maintains this state;

[0021] Third, the second jack is loaded, and the steel bar fixing beam is lifted up by the second jack, thereby applying an upward pull force on the steel bars of the slow-setting prestressed pull-out pile through the steel bar fixing beam, and applying an upward pull force on the steel strands of the slow-setting prestressed pull-out pile through the steel bar fixing beam, the first jack and the steel strand fixing beam, so that the steel strands and steel bars of the slow-setting prestressed pull-out pile can jointly bear the upward pull force applied by the second jack; until the second jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed.

[0022] In the pull-out bearing capacity testing method of the slow-setting prestressed pull-out pile of the present scheme, in the second step, a pull-out force is first applied to the steel strand by the first jack, so that the steel strand is first stressed and stretched, and after the pull-out force applied to the steel strand by the first jack reaches a set value F1, it is stretched first; thereafter, in the third step, loading is performed by the second jack, so that the steel strand and the steel bar of the slow-setting prestressed pull-out pile jointly bear the pull-out force applied by the jack, until the second jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed, thereby effectively improving the accuracy of the pull-out bearing capacity test of the slow-setting prestressed pull-out pile, and thus being able to accurately and effectively evaluate the pull-out bearing capacity of the slow-setting prestressed pull-out pile.

[0023] Preferably, in the first step, the steel strands of the slow-setting prestressed anti-pullout piles are fixed to the steel strand fixing beams by anchors. In this way, the steel strands can be stably and reliably fixed to the steel strand fixing beams by the anchors, and are convenient for disassembly.

[0024] Preferably, in the first step, the rebar of the slow-setting prestressed anti-pullout pile is fixed to the rebar fixing beam by welding or anchoring. Welding the rebar secures the rebar to the rebar fixing beam stably and reliably. Anchoring the rebar secures the rebar to the rebar fixing beam stably and reliably, while also facilitating disassembly.

[0025] Preferably, the pile test equipment further comprises an anchor pile, which is anchored into the ground and used to support a jack, and the jack is supported on the top surface of the anchor pile.

[0026] Preferably, the steel bar fixing beam is provided with a steel strand through hole.

[0027] The beneficial effect of the present invention is that the pull-out bearing capacity of the slow-setting prestressed pull-out pile can be accurately and effectively evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the pile testing device of the first specific embodiment of the present invention during actual application.

[0029] Figure 2 It is a structural schematic diagram of the pile testing device according to the second specific embodiment of the present invention during actual application.

[0030] In the picture:

[0031] Beam 1;

[0032] Jack 2a, first jack 2b, second jack 2c;

[0033] Anchor pile 3;

[0034] Anchor 4;

[0035] Slow setting prestressed pull-out pile 5;

[0036] Steel strand 6;

[0037] Steel bar 7;

[0038] Steel bar fixed beam 8;

[0039] Steel strand fixed beam 9. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0041] Specific embodiment 1, as Figure 1 A method for testing the pullout bearing capacity of a slow-setting prestressed pullout pile 5 is shown. The pile 5 includes a steel strand 6 and a steel bar 7. The method employs a pile testing apparatus to test the pullout bearing capacity of the slow-setting prestressed pullout pile. The pile testing apparatus includes a beam 1 and a jack 2a for lifting the beam.

[0042] The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile comprises the following steps:

[0043] First, fix the steel strands of the slow-setting prestressed pull-out piles to the beams.

[0044] Second, the beam is lifted upward by the jack, thereby applying an upward pull force to the steel strands of the slow-setting prestressed pull-out piles through the beam. After the upward pull force applied by the jack to the steel strands reaches the set value F1, the jack maintains this state (the jack maintaining this state means that the upward pull force applied by the jack to the steel strands remains at the set value F1).

[0045] Third, fix the steel bars of the slow-setting prestressed pull-out piles on the beams.

[0046] Fourth, the jack continues to load, lifting the crossbeam upward, thereby applying an upward pull force to the steel strands and steel bars of the slow-setting prestressed pull-out pile through the crossbeam, so that the steel strands and steel bars of the slow-setting prestressed pull-out pile jointly bear the upward pull force applied by the jack until the jack load reaches the set value F2 or until the slow-setting prestressed pull-out pile is damaged. The set value F2 is greater than the set value F1. According to the "Technical Specification for Testing of Building Foundation Piles" JGJ106, damage to a slow-setting prestressed pull-out pile means that the pile is pulled upward by more than 100 mm or the steel bars or strands are broken.

[0047] In the second step of the method for testing the pull-out bearing capacity of the slow-setting prestressed pull-out pile of the present embodiment, a pull-out force is first applied to the steel strand by a jack, so that the steel strand is first stressed and elongated, and after the pull-out force applied to the steel strand by the jack reaches a set value F1, it is first elongated; thereafter, the steel bars of the slow-setting prestressed pull-out pile are fixed on the crossbeam, and in the fourth step, the loading is continued by the jack, so that the steel strand and the steel bars of the slow-setting prestressed pull-out pile jointly bear the pull-out force applied by the jack (the steel strand no longer elongates during this process), until the jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed, thereby effectively improving the accuracy of the pull-out bearing capacity test of the slow-setting prestressed pull-out pile, and thus being able to accurately and effectively evaluate the pull-out bearing capacity of the slow-setting prestressed pull-out pile.

[0048] Specifically, such as Figure 1 As shown, the pile test equipment also includes anchor piles 3. The anchor piles are anchored into the ground and support the jacks, which are supported on the top surfaces of the anchor piles. In this embodiment, there are two anchor piles, and the lifting device includes two jacks: one jack is located on the top surface of one anchor pile, and the other jack is located on the top surface of the other anchor pile. The two jacks simultaneously lift the beam upward. The beams are arranged horizontally.

[0049] In the first step, the steel strands of the slow-setting prestressed pullout piles are secured to the beam using anchors 4. Each anchor secures one strand. This ensures a stable and reliable attachment of the strands to the beam, while also facilitating removal. In this embodiment, the beam is provided with a strand hole, and the anchor is secured to its upper surface. After passing the strand hole, the anchor is secured to the beam.

[0050] In one implementation of this embodiment, in the third step, the steel bars of the slow-setting prestressed anti-pullout piles are fixed to the beams by welding. Fixing the steel bars by welding can stably and reliably fix the steel bars to the beams.

[0051] In another implementation of this embodiment, in the third step, the rebar of the slow-setting prestressed pullout piles is secured to the beam using anchors. Each anchor secures one rebar. Using anchors to secure the rebar ensures stable and reliable attachment to the beam while also facilitating removal. In this implementation, the beam is provided with rebar holes, through which the rebar passes and is then secured to the beam using anchors.

[0052] Specific embodiment 2, as Figure 2 As shown, a method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile 5 includes a steel strand 6 and a steel bar 7. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile uses a pile test device to test the pull-out bearing capacity of the slow-setting prestressed pull-out pile. The pile test device includes a steel bar fixing beam 8, a steel strand fixing beam 9 located above the steel bar fixing beam, a first jack 2b located between the steel bar fixing beam and the steel strand fixing beam, and a second jack 2c for lifting the steel bar fixing beam. The first jack is used to lift the steel strand fixing beam. The steel bar fixing beam is used to fix the steel bars of the slow-setting prestressed pull-out pile. The steel strand fixing beam is used to fix the steel strands of the slow-setting prestressed pull-out pile. In this embodiment, the steel bar fixing beam is parallel to the steel strand fixing beam, and the steel bar fixing beam is horizontally distributed.

[0053] The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile comprises the following steps:

[0054] First, fix the steel strands of the slow-setting prestressed anti-pullout piles on the steel strand fixing beams;

[0055] Fix the steel bars of the slow-setting prestressed pull-out piles on the steel bar fixing beams.

[0056] Second, the first jack is loaded, and the steel strand fixing beam is lifted up by the first jack, thereby applying an upward pulling force to the steel strands of the slow-setting prestressed pull-out piles through the steel strand fixing beam, so that the steel strands of the slow-setting prestressed pull-out piles are stressed and stretched first. After the upward pulling force applied to the steel strands by the first jack reaches the set value F1, the first jack maintains this state (the first jack maintaining this state means that the upward pulling force applied to the steel strands by the first jack is maintained at the set value F1).

[0057] Third, the second jack is loaded, and the steel bar fixing beam is lifted upward by the second jack, thereby applying a pull-out force to the steel bars of the slow-setting prestressed pull-out pile through the steel bar fixing beam, and applying a pull-out force to the steel strands of the slow-setting prestressed pull-out pile through the steel bar fixing beam, the first jack, and the steel strand fixing beam, so that the steel strands and steel bars of the slow-setting prestressed pull-out pile jointly bear the pull-out force applied by the second jack; until the second jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed. The set value F2 is greater than the set value F1. According to the "Technical Specification for Testing of Building Foundation Piles" JGJ106, the destruction of a slow-setting prestressed pull-out pile means that the slow-setting prestressed pull-out pile is pulled up more than 100mm or the steel bars or steel strands are broken.

[0058] In the pull-out bearing capacity testing method of the slow-setting prestressed pull-out pile of the present embodiment, in the second step, a pull-out force is first applied to the steel strand by the first jack, so that the steel strand is first stressed and elongated, and after the pull-out force applied to the steel strand by the first jack reaches a set value F1, it is first elongated; thereafter, in the third step, loading is performed by the second jack, so that the steel strand and the steel bar of the slow-setting prestressed pull-out pile jointly bear the pull-out force applied by the jack (the steel strand no longer elongates during this process), until the second jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed, thereby effectively improving the accuracy of the pull-out bearing capacity test of the slow-setting prestressed pull-out pile, and thus being able to accurately and effectively evaluate the pull-out bearing capacity of the slow-setting prestressed pull-out pile.

[0059] Specifically, such as Figure 2 As shown, the pile test equipment also includes anchor piles 3. The anchor piles are anchored into the ground and support the second jacks, which are supported on the top surface of the anchor piles. In this embodiment, there are two anchor piles and two second jacks, one on the top surface of one anchor pile and the other on the top surface of the other anchor pile. The two second jacks simultaneously lift the steel bar fixing beam upward.

[0060] In the first step, the steel strands of the slow-setting prestressed pullout piles are secured to the strand-fixing beams via anchors 4. Each anchor secures one strand. This allows the anchors to stably and reliably secure the strands to the strand-fixing beams while also facilitating removal. In this embodiment, both the strand-fixing beams and the reinforcement beams are provided with strand holes. The anchors are secured to the upper surfaces of the strand-fixing beams. After the strands pass through the strand holes in the strand-fixing beams and the reinforcement beams, they are secured to the strand-fixing beams via the anchors.

[0061] In one implementation of this embodiment, in the first step, the steel bars of the slow-setting prestressed anti-pullout piles are fixed to the steel bar fixing beam by welding. Fixing the steel bars by welding can stably and reliably fix the steel bars to the steel bar fixing beam.

[0062] In another implementation of this embodiment, in the first step, the rebar of the slow-setting prestressed pullout piles is secured to the rebar fixing beam using anchors. One anchor secures one rebar. Using anchors to secure the rebar ensures stable and reliable attachment of the rebar to the beam while also facilitating removal. In this implementation, the rebar fixing beam is provided with a rebar through-hole. After the rebar passes through the through-hole, it is secured to the rebar fixing beam using anchors.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for testing the pullout bearing capacity of a slow-setting prestressed pullout pile, wherein the method uses a pile test device to test the pullout bearing capacity of the slow-setting prestressed pullout pile, the pile test device comprising a crossbeam and a jack for lifting the crossbeam, the slow-setting prestressed pullout pile comprising a steel strand and steel bars, and is characterized in that: The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile comprises the following steps: First, fix the steel strands of the slow-setting prestressed anti-pullout piles to the beams; Second, the beam is lifted upward by the jack, so that the beam exerts an upward pulling force on the steel strand of the slow-setting prestressed anti-pullout pile. After the upward pulling force exerted by the jack on the steel strand reaches the set value F1, the jack maintains this state; Third, fix the steel bars of the slow-setting prestressed anti-pullout piles to the beams; Fourth, the jack continues to load and push the crossbeam upward, thereby applying an upward pull force on the steel strands and steel bars of the slow-setting prestressed pull-out pile through the crossbeam, so that the steel strands and steel bars of the slow-setting prestressed pull-out pile can jointly bear the upward pull force applied by the jack until the jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed.

2. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 1, wherein: In the first step, the steel strands of the slow-setting prestressed pull-out piles are fixed to the beams by anchors.

3. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 1, wherein: In the third step, the steel bars of the slow-setting prestressed anti-pullout piles are fixed to the beams by welding or anchoring.

4. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 1, wherein: The pile test equipment further comprises an anchor pile, which is anchored into the ground and used to support a jack, and the jack is supported on the top surface of the anchor pile.

5. A method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile, the slow-setting prestressed pull-out pile comprising a steel strand and steel bars, characterized in that: The method uses a pile test device to test the pull-out bearing capacity of a slow-setting prestressed pull-out pile. The pile test device includes a steel bar fixing beam, a steel strand fixing beam located above the steel bar fixing beam, a first jack located between the steel bar fixing beam and the steel strand fixing beam, and a second jack for lifting the steel bar fixing beam. The first jack is used to lift the steel strand fixing beam. The pull-out bearing capacity test method of the slow-setting prestressed pull-out pile includes the following steps in sequence: First, fix the steel strands of the slow-setting prestressed anti-pullout piles on the steel strand fixing beams; Fix the steel bars of the slow-setting prestressed anti-pullout piles on the steel bar fixing beams; Second, the first jack is loaded, and the steel strand fixing beam is lifted up by the first jack, thereby applying an upward pull force to the steel strands of the slow-setting prestressed pull-out pile through the steel strand fixing beam, so that the steel strands of the slow-setting prestressed pull-out pile are stressed and elongated first. After the upward pull force applied to the steel strand by the first jack reaches the set value F1, the first jack maintains this state; Third, the second jack is loaded, and the steel bar fixing beam is lifted up by the second jack, thereby applying a pull-out force on the steel bars of the slow-setting prestressed pull-out pile through the steel bar fixing beam, and applying a pull-out force on the steel strands of the slow-setting prestressed pull-out pile through the steel bar fixing beam, the first jack and the steel strand fixing beam, so that the steel strands and steel bars of the slow-setting prestressed pull-out pile can jointly bear the pull-out force applied by the second jack; until the second jack is loaded to the set value F2 or until the slow-setting prestressed pull-out pile is destroyed.

6. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 5, wherein: In the first step, the steel strands of the slow-setting prestressed pull-out piles are fixed to the steel strand fixing beams by means of anchors.

7. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 5, wherein: In the first step, the steel bars of the slow-setting prestressed anti-pullout piles are fixed to the steel bar fixing beams by welding or anchoring.

8. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 5, wherein: The pile test equipment further comprises an anchor pile, which is anchored into the ground and used to support a second jack, and the second jack is supported on the top surface of the anchor pile.

9. The method for testing the pull-out bearing capacity of a slow-setting prestressed pull-out pile according to claim 5, wherein: The steel bar fixing beam is provided with a steel strand through hole.

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