Uplift resistance test device and method for rock-socketed pile

Abstract

Disclosed in the present invention is an uplift resistance test method for a rock-socketed pile, comprising a test model preparation process and a test process. The test model preparation process comprises: step 1, manufacturing a test model preparation apparatus comprising a rock mass preparation mold and a hoisting frame; step 2, hoisting the rock mass preparation mold to a pouring site by means of the hoisting frame, removing the hoisting frame, mounting a rock-socketed hole mold, and pouring a rock mass model; step 3, removing the rock-socketed hole mold, forming a rock-socketed hole, mounting a pile body mold, placing a reinforcement cage in the rock-socketed hole and the pile body mold, pouring a pile body model, and forming a test model; and step 4, first removing the pile body mold and side formworks of the rock mass preparation mold, and then remounting two groups of side formwork support steels and the hoisting frame. The test process sequentially comprises: assembling a test apparatus on a test model, carrying out a test, removing the test apparatus, and transporting the test model to a storage site for subsequent crushing. The present invention can satisfy the preparation, transportation and test requirements of a test model.

Description

A device and method for rock-socketed pile uplift test TECHNICAL FIELD

[0001] The present application relates to a device and method for rock-socketed pile uplift test. BACKGROUND

[0002] The rock-socketed pile uplift test is to detect the vertical uplift ultimate bearing capacity of the pile foundation and the friction resistance of the pile, to judge whether the pile foundation meets the design uplift requirements, to provide a scientific basis for the design and construction of the pile foundation, and to improve the safety and reliability of the project. The test model used in the rock-socketed pile uplift test includes a rock mass model and a pile body model, wherein the rock mass model is generally the key to the test. The rock mass model is mostly prepared by pouring cement, barite powder, fine aggregate, etc., and there are also rock materials directly used as rock mass models. The rock model directly poured has many advantages such as convenient procurement and customization of size, and thus becomes an important method for rock-socketed pile test.

[0003] In the past, when pouring the rock mass model and the pile body model, wooden templates were often built for pouring, and the rock mass model and the pile body model were poured in succession. The advantage of this method is lower cost, but it is not very convenient to use and takes a long time.

[0004] There are also schemes considering using steel molds for pouring, but the transportation, removal and subsequent testing of the model are less considered; and the convenience of the test model during the test is not considered when pouring the test model. SUMMARY

[0005] The purpose of the present application is to overcome the defects of the prior art and provide a rock-socketed pile uplift test method which can meet the requirements of test model preparation, transportation and testing.

[0006] The purpose of the present application is achieved by a rock-socketed pile uplift test method, comprising a test model preparation process and a test process;

[0007] The test model preparation process comprises the following steps:

[0008] Step one, making a test model preparation device, the test model preparation device comprising a rock mass preparation mold, a rock-socketed hole mold, a pile body mold and a hoisting frame; the rock mass preparation mold comprising a bottom mold and a side mold, wherein,

[0009] The bottom mold comprises a steel bottom plate and a group of bottom mold support steel plates which are detachably installed on the bottom surface of the steel bottom plate and have a length greater than the width of the steel bottom plate; the four peripheral edges of the steel bottom plate are provided with channels;

[0010] The side mold is surrounded by two lateral side mold plates and two longitudinal side mold plates through connecting pieces; each lateral side mold plate comprises a lateral steel side plate, a set of side mold support steel bars which are detachably mounted on the outer surface of the lateral steel side plate and have a height greater than that of the lateral steel side plate, and a friction-reducing plate which is covered on the inner surface of the lateral steel side plate; a set of side mold support steel bars on the two lateral side mold plates are correspondingly arranged with a set of bottom mold support steel bars; each longitudinal side mold plate comprises a longitudinal steel side plate and a friction-reducing plate which is covered on the inner surface of the longitudinal steel side plate; the bottom surface of each lateral steel side plate and the bottom surface of each longitudinal steel side plate are both provided with a plurality of bosses downward at intervals, which are adapted to the channels on the bottom mold, and a plurality of balls are mounted between adjacent bosses;

[0011] The bosses and balls on the bottom of the two lateral side mold plates and the bosses and balls on the bottom of the two longitudinal side mold plates are all embedded in the channels corresponding to the bottom mold, and a set of side mold support steel bars on the outer surface of the two lateral side mold plates are correspondingly and detachably mounted on the top surface of the two ends of a set of bottom mold support steel bars;

[0012] The rock-embedded hole mold is suspended on the upper part of the central cavity of the rock body preparation mold;

[0013] The pile body mold is coaxially placed on the top of the rock-embedded hole formed by the rock-embedded hole mold after the rock body model is prepared;

[0014] The lifting frame is a grid-shaped frame welded by a set of lateral steel bars and a set of longitudinal steel bars, the spacing of the set of lateral steel bars of the lifting frame is adapted to the spacing of a set of side mold support steel bars on the two lateral side mold plates, so that the two ends of the set of lateral steel bars of the lifting frame are correspondingly connected with the top of the set of side mold support steel bars on the two lateral side mold plates;

[0015] Step two, first hoist the rock body preparation mold to the pouring site through the lifting frame, then remove the lifting frame, install the rock-embedded hole mold, pour the mixed rock material into the cavity of the rock body preparation mold for rock body model pouring, and then perform normal curing;

[0016] Step three, after the rock body model is cured, first remove the rock-embedded hole mold to form a rock-embedded hole on the central top surface of the rock body model, then place a cylindrical pile body mold coaxially on the top surface of the rock body model, then place the reinforcement cage of the pile body model into the rock-embedded hole and the pile body mold, and then perform pile body model pouring in the rock-embedded hole and the pile body mold, and after curing, a pile body model is formed, the top surface of which exposes the pile body reinforcement, and the pile body model and the rock body model form a complete test model together;

[0017] Step four, after the pile body model is cured, the pile body mold and the side mold of the rock body preparation mold are removed; first, the connecting piece between the horizontal side mold plate and the longitudinal side mold plate is removed, then the two horizontal side mold plates and the two longitudinal side mold plates are pushed out along the groove on the bottom mold; after the side mold is removed, the two sets of side mold support steel are re-installed on the top surface of the two ends of the set of bottom mold support steel one by one, and the hoisting frame is installed between the top of the two sets of side mold support steel, forming a test model carrying frame;

[0018] The test process comprises the following steps:

[0019] Step one, erecting a test device, the test device comprising two lower loading longitudinal beams, two pairs of jacks, two upper loading crossbeams, four support columns, a loading disc and a plurality of small steel plates, wherein,

[0020] The two lower loading longitudinal beams are placed one by one on the top surface of the two sides of the rock mass model;

[0021] The two pairs of jacks are arranged one by one on the top surface of the middle part of the two lower loading longitudinal beams; the distance between each pair of jacks is greater than the outer diameter of the pile body model;

[0022] The two upper loading crossbeams are installed one by one on the top surface of the two pairs of jacks;

[0023] The four support columns are placed on the ground and supported one by one at the two ends of the two upper loading crossbeams;

[0024] The loading disc is arranged across the middle part between the two upper loading crossbeams; the middle part of the loading disc is provided with a through hole corresponding to the pile body main reinforcement, so that the upper part of the pile body main reinforcement can pass through the through hole of the loading disc;

[0025] A plurality of small steel plates are welded between the upper parts of the pile body main reinforcement that are higher than the loading disc;

[0026] The test device is erected in the following order:

[0027] 1) After the test model on the test model carrying frame is hoisted to the test position, the hoisting frame on the test model carrying frame is removed, and then the two lower loading longitudinal beams and the two pairs of jacks are hoisted and installed in turn;

[0028] 2) Place the four support columns first, then hoist and install the two upper loading crossbeams, and adjust the height of the two pairs of jacks so that the top end surface of the two pairs of jacks is in contact with the bottom surface of the two upper loading crossbeams;

[0029] 3) Hoist and install the loading disc, and pass the pile body main reinforcement through the through hole of the loading disc;

[0030] 4) Weld the small steel plates to fix the pile body main reinforcement and the loading disc;

[0031] Step two, according to the relevant provisions of the rock-socketed pile uplift test;

[0032] Step three, after the test, cut off the welding between the main reinforcement of the pile body and the small steel plate, then hoist and remove the loading disc, two upper loading beams, two pairs of jacks, two lower loading longitudinal beams, four support columns in turn, then re-install the hoisting and transporting frame, transport the test model to the storage site and wait for crushing.

[0033] The rock-socketed pile uplift test method, wherein the top surface of the steel bottom plate of the bottom mold is covered with a friction-reducing plate.

[0034] The rock-socketed pile uplift test method, wherein the friction-reducing plate is made of polytetrafluoroethylene plate.

[0035] The rock-socketed pile uplift test method, wherein the connecting piece between the horizontal side mold plate and the vertical side mold plate in the rock mass preparation mold is made of a lock or a bolt; the horizontal steel side plate and the side mold support steel are connected by bolts, and the hoisting and transporting frame and the side mold support steel are connected by bolts.

[0036] The rock-socketed pile uplift test method, wherein the rock-socketed hole mold in the rock mass preparation mold is made of PVC or metal material.

[0037] The rock-socketed pile uplift test method, wherein a pair of lifting lugs is also uniformly fixed on the top surface of the hoisting and transporting frame.

[0038] The rock-socketed pile uplift test method, wherein each lower loading longitudinal beam in the test device is composed of several steel profiles.

[0039] The rock-socketed pile uplift test method and the method have the following characteristics:

[0040] 1. The test model preparation device used in the present application is installed with support steel on the bottom mold and the side mold of the rock mass preparation mold, which ensures that the overall structure stress of the test model during hoisting can meet the requirements, and realizes repeated use multiple times; the installation and disassembly operation of the test model preparation device is convenient, and the hoisting and transporting frame is configured, which can facilitate the transportation of the test model;

[0041] 2. The test device used in the present application is directly erected on the test model carrying frame, which is a device based on the rock mass preparation mold, has the characteristics of light weight, convenient erection, multiple repeated use, strong complete set, low cost, convenient test operation, and precision meeting the needs of test specification, can detect the uplift bearing capacity of the rock-socketed pile with time and labor saving, and can quickly and conveniently transport the test model to the storage site after the test is completed to wait for crushing. BRIEF DESCRIPTION OF DRAWINGS

[0042] Fig. 1 is a perspective view of the test model preparation device used in the rock-socketed pile uplift test method of the present application;

[0043] Fig. 2 is an elevation view of a rock mass preparation mold used in the rock-socketed pile uplift test method of the present application;

[0044] Fig. 3 is a plan view of a bottom mold in the rock mass preparation mold used in the present application;

[0045] Fig. 4 is a structural schematic view of a side mold plate in the rock mass preparation mold used in the present application;

[0046] Fig. 5 is an elevation view of one state at step three in the test model preparation process of the rock-socketed pile uplift test method of the present application;

[0047] Fig. 6 is another elevation view of one state at step three in the test model preparation process of the rock-socketed pile uplift test method of the present application;

[0048] Fig. 7 is an elevation view of a test device used in the rock-socketed pile uplift test method of the present application;

[0049] Fig. 8 is a plan view of the test device used in the rock-socketed pile uplift test method of the present application;

[0050] Fig. 9 is a plan detailed view of a loading disc in the test device used in the present application;

[0051] Fig. 10 is an elevation detailed view of the loading disc in the test device used in the present application. DETAILED DESCRIPTION

[0052] The present application will be further described below in conjunction with the accompanying drawings.

[0053] The rock-socketed pile uplift test method of the present application comprises a test model preparation process and a test process;

[0054] The test model preparation process comprises the following steps:

[0055] Step one, making a test model preparation device (see Figs. 1 to 4); the test model preparation device comprises a rock mass preparation mold 100, a rock-socketed hole mold 200, a pile body mold 300 and a hoisting frame 400;

[0056] The rock mass preparation mold 100 comprises a bottom mold 1 and a side mold, wherein,

[0057] The bottom mold 1 comprises a steel bottom plate 11, a set of bottom mold support steel bars 12 installed on the bottom surface of the steel bottom plate 11 through bolts and having a length greater than the width of the steel bottom plate 11, and a friction-reducing plate 10 covering the top surface of the steel bottom plate 11; the four peripheral edges of the steel bottom plate 11 are provided with channels 110 (see Fig. 3);

[0058] The side mold is surrounded by two lateral side mold plates 21 and two longitudinal side mold plates 22 through locks or bolts; each lateral side mold plate 21 comprises a lateral steel side plate 211, a set of side mold support steel bars 212 installed on the outer surface of the lateral steel side plate 211 through bolts and having a height greater than that of the lateral steel side plate 211, and a friction-reducing plate 10 covering the inner surface of the lateral steel side plate 210; the set of side mold support steel bars 212 on the two lateral side mold plates 210 are arranged correspondingly to the set of bottom mold support steel bars 12; each longitudinal side mold plate 22 comprises a longitudinal steel side plate 221 and a friction-reducing plate 10 covering the inner surface of the longitudinal steel side plate 221; the bottom surface of each lateral steel side plate 211 and the bottom surface of each longitudinal steel side plate 221 are both provided with a plurality of bosses 213 downwardly and spaced apart, which are adapted to the channels 110 on the bottom mold 1, and a plurality of balls 214 are installed between adjacent bosses 213 (see FIG. 4);

[0059] The friction-reducing plate 10 is made of polytetrafluoroethylene plate;

[0060] The bosses 213 and balls 214 at the bottom of the two lateral side mold plates 21 and the bosses 213 and balls 214 at the bottom of the two longitudinal side mold plates 22 are all embedded in the channels 110 corresponding to the bottom mold 1, and the set of side mold support steel bars 212 on the outer surface of the two lateral side mold plates 21 are one-to-one correspondingly and detachably installed on the top surface of the two ends of the set of bottom mold support steel bars 12;

[0061] The rock-embedding hole mold 200 is suspended in the central upper part of the inner cavity of the rock body preparation mold 100; the rock-embedding hole mold 200 is made of PVC or metal material;

[0062] The pile body mold 300 is in the shape of a cylinder and is coaxially placed at the top of the rock-embedding hole 501 formed by the rock-embedding hole mold 200 after the rock body model 500 is prepared;

[0063] The hoisting frame 400 is a grid-shaped frame welded by a set of lateral steel bars 401 and a set of longitudinal steel bars 402; the spacing of the set of lateral steel bars 401 of the hoisting frame 400 is adapted to the spacing of the set of side mold support steel bars 212 on the two lateral side mold plates 21, so that the two ends of the set of lateral steel bars 401 of the hoisting frame 400 are respectively connected to the top of the set of side mold support steel bars 212 on the two lateral side mold plates 21 through bolts one-to-one correspondingly; a pair of lifting lugs (not shown in the figure) are also fixed on the top top surface of the hoisting frame 400 in a uniform manner, so as to be hoisted and transported;

[0064] Step two, first hoist the rock mass preparation mold 100 to the pouring site by the lifting frame 400, then remove the lifting frame 400, install the rock-embedded hole mold 200, pour the mixed rock material into the inner cavity of the rock mass preparation mold 100 to pour the rock mass model 50, and then perform normal curing; if the rock mass model 50 needs to be moved during the curing, install the lifting frame 400 on the rock mass preparation mold 100 for hoisting;

[0065] Step three, after the rock mass model 50 is cured, first remove the rock-embedded hole mold 200 to form the rock-embedded hole 500 in the center of the top surface of the rock mass model 50, then place the pile body mold 300 coaxially with the rock-embedded hole 500 on the top surface of the rock mass model 50 (see FIG. 5), then place the reinforcement cage of the pile body model 60 into the rock-embedded hole 500 and the pile body mold 300, and then pour the pile body model 60 in the rock-embedded hole 500 and the pile body mold 300, and after curing, the pile body model 60 is formed, the top surface of the pile body model 60 exposes the pile body main reinforcement 600 (see FIG. 6), and the pile body model 60 and the rock mass model 50 form a complete test model together;

[0066] Step four, after the pile body model 60 is cured, remove the side mold of the pile body mold 300 and the rock mass preparation mold 100; first remove the locks or bolts between the horizontal side mold plates 21 and the longitudinal side mold plates 22, and then use a screw rod, an electric screw rod or the like to push out the two horizontal side mold plates 21 and the two longitudinal side mold plates 22 along the grooves 110 on the base mold 1, since the bottom surfaces of the horizontal side mold plates 21 and the longitudinal side mold plates 22 are both provided with the ball bearings 214, and the inner surfaces of the horizontal side mold plates 21 and the longitudinal side mold plates 22 are both covered with the friction-reducing plates 10, the resistance to pushing out when the side mold is removed can be reduced; after the side mold is removed, the two groups of side mold support steel bars 212 are re-installed one by one on the top surfaces of the two ends of the group of base mold support steel bars 12, and the lifting frame 400 is installed between the tops of the two groups of side mold support steel bars 212 to form a test model carrying frame, which facilitates the hoisting of the entire test model;

[0067] The test procedure includes the following steps:

[0068] Step one, set up the test device (see FIGS. 7 to 10), which includes two lower loading longitudinal beams 71, two pairs of jacks 72, two upper loading cross beams 73, four support columns 70, a loading disc 74 and a plurality of small steel plates 75, wherein,

[0069] The two lower loading longitudinal beams 71 are placed one by one on the top surfaces of the two sides of the rock mass model 50; each lower loading longitudinal beam 71 is composed of a plurality of steel bars;

[0070] The two pairs of jacks 72 are arranged one by one on the middle top surfaces of the two lower loading longitudinal beams 71; the distance between each pair of jacks 72 is greater than the outer diameter of the pile body model 60;

[0071] Two upper loading beams 73 are installed on the top surface of the two pairs of jacks 72 respectively;

[0072] Four supporting columns 70 are placed on the ground and are supported on the two ends of the two upper loading beams 73 respectively;

[0073] A loading plate 74 is placed between the middle portions of the two upper loading beams 73; the middle portion of the loading plate 74 is provided with through holes 740 corresponding to the pile body main reinforcement 600, so that the upper portion of the pile body main reinforcement 600 can pass through the through holes 740 of the loading plate 74;

[0074] A plurality of small steel plates 75 are welded between the upper portions of the pile body main reinforcement 600 above the loading plate 74;

[0075] The test device is erected in the following order:

[0076] 1) After the test model on the test model carrier is hoisted to the test position, the carrier 400 is removed, and then the two lower loading longitudinal beams 71 and the two pairs of jacks 72 are hoisted and installed in sequence;

[0077] 2) The four supporting columns 70 are placed on the ground at the test position, and then the two upper loading beams 73 are hoisted and installed, and the height of the two pairs of jacks 72 is adjusted so that the top end surface of the two pairs of jacks 72 is in contact with the bottom surface of the two upper loading beams 73;

[0078] 3) The loading plate 74 is hoisted and installed, and the pile body main reinforcement 600 passes through the through holes 740 of the loading plate 74;

[0079] 4) The small steel plates 75 are welded to fix the pile body main reinforcement 600 and the loading plate 74;

[0080] Step two, the rock-socketed pile uplift test is carried out, and the test is carried out according to the relevant provisions, that is, the two pairs of jacks 72 are gradually loaded, the two upper loading beams 73 are lifted upward by the two pairs of jacks 72, and uniform upward load is applied to the pile body main reinforcement 600 through the loading plate 74, that is, uniform upward load is applied to the pile body model 60, and at the same time, equal and opposite force is formed on the two pairs of jacks 72, when the pile body model 60 is pulled out of the rock mass model 50, the value of the opposite force on the jacks at this time is recorded, which can be calculated according to the length of the upper loading beam 73 and the length of the lower loading longitudinal beam 71 according to the moment formula, that is, the uplift bearing capacity of the pile body model 60 can be calculated;

[0081] Step three, after the test is completed, cut off the pile body main reinforcement 600 and small steel plate 75, and then hoist and remove the loading disc 74, two upper loading beams 73, two pairs of jacks 72, two lower loading longitudinal beams 71 and four support columns 70 in sequence, and then install the hoisting frame 400 between the top of the two groups of side mold support steel 212, transport the test model to the storage place to wait for crushing.

[0082] The above examples are only for illustrating the present application, and are not a limitation of the present application. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions should belong to the scope of the present application, which should be limited by the claims.

Claims

1. A method for testing the anti-pulling of a rock-socketed pile, comprising a test model preparation process and a test process; characterized in that, the test model preparation process comprises the following steps: Step one, making a test model preparation device, which comprises a rock mass preparation mold, a rock-socketed hole mold, a pile body mold and a hoisting frame; the rock mass preparation mold comprises a bottom mold and a side mold, wherein, the bottom mold comprises a steel bottom plate and a set of bottom mold support steel bars which are detachably mounted on the bottom surface of the steel bottom plate and have a length greater than the width of the steel bottom plate; the four peripheral edges of the steel bottom plate are provided with channels; the side mold is enclosed by two lateral side mold plates and two longitudinal side mold plates through connecting pieces; each lateral side mold plate comprises a lateral steel side plate, a set of side mold support steel bars which are detachably mounted on the outer surface of the lateral steel side plate and have a height greater than the height of the lateral steel side plate, and a friction-reducing plate which is covered on the inner surface of the lateral steel side plate; a set of side mold support steel bars on the two lateral side mold plates are correspondingly arranged with a set of bottom mold support steel bars; each longitudinal side mold plate comprises a longitudinal steel side plate and a friction-reducing plate which is covered on the inner surface of the longitudinal steel side plate; a set of protrusions which are adapted to the channels on the bottom mold are spaced downwardly on the bottom surface of each lateral steel side plate and the bottom surface of each longitudinal steel side plate, and a ball is mounted between adjacent protrusions; the protrusions and balls on the bottom of the two lateral side mold plates and the protrusions and balls on the bottom of the two longitudinal side mold plates are embedded in the channels corresponding to the bottom mold, and a set of side mold support steel bars on the outer surface of the two lateral side mold plates are detachably mounted on the top surface of both ends of a set of bottom mold support steel bars one by one in a corresponding manner; the rock-socketed hole mold is suspended on the upper central part of the inner cavity of the rock mass preparation mold; the pile body mold is coaxially placed on the top of the rock-socketed hole formed by the rock-socketed hole mold after the rock mass model is prepared; the hoisting frame is a grid-shaped frame welded by a set of lateral steel bars and a set of longitudinal steel bars, the spacing of the set of lateral steel bars of the hoisting frame is adapted to the spacing of a set of side mold support steel bars on the two lateral side mold plates, so that both ends of the set of lateral steel bars of the hoisting frame are connected to the top of a set of side mold support steel bars on the two lateral side mold plates one by one in a corresponding manner; Step two, first hoist the rock mass preparation mold to the pouring site through the hoisting frame, then remove the hoisting frame, install the rock-socketed hole mold, pour the mixed rock material into the inner cavity of the rock mass preparation mold to pour the rock mass model, and then perform normal curing; Step three, after the rock mass model is cured, first remove the rock-socketed hole mold to form a rock-socketed hole on the top surface of the rock mass model, then place a cylindrical pile body mold coaxially on the top surface of the rock mass model, then place the reinforcement cage of the pile body model into the rock-socketed hole and the pile body mold, then pour the pile body model in the rock-socketed hole and the pile body mold, and after curing, a pile body model is formed, the top surface of the pile body model exposes the pile body reinforcement, and the pile body model and the rock mass model form a complete test model together. Step four, after the pile body model is cured, the pile body mold and the side mold of the rock mass preparation mold are removed; first, the connecting piece between the horizontal side mold plate and the longitudinal side mold plate is removed, then the two horizontal side mold plates and the two longitudinal side mold plates are pushed out along the groove on the bottom mold by using the ejection tool; after the side mold is removed, the two sets of side mold support steel are re-installed on the top surface of the two ends of a set of bottom mold support steel one by one, and the hoisting frame is installed between the top of the two sets of side mold support steel to form a test model carrying frame; The test process comprises the following steps: Step one, erect the test device, which comprises two lower loading longitudinal beams, two pairs of jacks, two upper loading crossbeams, four support columns, a loading disc and a plurality of small steel plates, wherein, The two lower loading longitudinal beams are placed on the top surface of the two sides of the rock mass model one by one; The two pairs of jacks are arranged on the top surface of the middle part of the two lower loading longitudinal beams one by one; the distance between each pair of jacks is greater than the outer diameter of the pile body model; The two upper loading crossbeams are installed on the top surface of the two pairs of jacks one by one; The four support columns are placed on the ground and supported on the two ends of the two upper loading crossbeams one by one; The loading disc is arranged between the middle part of the two upper loading crossbeams; the middle part of the loading disc is provided with a through hole corresponding to the pile body main reinforcement, so that the upper part of the pile body main reinforcement can pass through the through hole of the loading disc; The plurality of small steel plates are welded between the upper part of the pile body main reinforcement which is higher than the loading disc; The test device is erected in the following order: 1) After the test model on the test model carrying frame is hoisted to the test position, the hoisting frame on the test model carrying frame is removed, and then the two lower loading longitudinal beams and the two pairs of jacks are hoisted and installed one by one; 2) Place the four support columns first, then hoist and install the two upper loading crossbeams, and adjust the height of the two pairs of jacks so that the top surface of the two pairs of jacks is in contact with the bottom surface of the two upper loading crossbeams; 3) Hoist and install the loading disc, and pass the pile body main reinforcement through the through hole of the loading disc; 4) Weld the small steel plates to fix the pile body main reinforcement and the loading disc; Step two, carry out the rock-socketed pile uplift test according to relevant regulations; Step three, after the test is completed, the welding between the pile body main reinforcement and the small steel plates is cut off, and then the loading disc, the two upper loading crossbeams, the two pairs of jacks, the two lower loading longitudinal beams, the four support columns are removed in turn, and then the hoisting frame is re-installed to carry the test model to the storage location for crushing.

2. The method of uplift testing of a rock-socketed pile according to claim 1, wherein, The top surface of the steel bottom plate of the bottom mold is covered with a friction-reducing plate.

3. The method according to claim 1 or 2, wherein The friction-reducing plate is made of polytetrafluoroethylene plate.

4. The method of claim 1, wherein, The connecting piece between the horizontal side mold plate and the longitudinal side mold plate in the rock mass preparation mold is made of a lock or a bolt; the horizontal steel side plate and the side mold support steel are connected by bolts, and the hoisting frame and the side mold support steel are also connected by bolts.

5. The method of testing a rock-socketed pile against uplift according to claim 1, wherein, The rock-socketed hole mold in the rock mass preparation mold is made of PVC or metal material.

6. The method of testing a rock-socketed pile against uplift according to claim 1, wherein, A pair of lifting lugs is also fixed on the top surface of the hoisting frame.

7. The method of testing a rock-socketed pile against uplift according to claim 1, wherein, Each lower loading longitudinal beam in the test device is composed of a plurality of steel profiles.

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