Static load experiment equipment for constructional engineering pile foundation

Abstract

The invention relates to the technical field of pile foundation detection, and particularly provides static load experiment equipment for a constructional engineering pile foundation. Comprising four anchor piles, a series-connection frame connected between the four anchor piles in series and in butt joint, a counter-force beam set, four counter-pull assemblies matched with the four anchor piles in a one-to-one correspondence mode, and a force application assembly used for applying upward jacking force to a main beam. The equipment provided by the invention is improved on the basis of an existing anchor pile method test system, so that the efficiency and the safety of assembly and lap joint are improved, the integrity of the equipment system is enhanced, the centering property and the vertical concentration degree of counterforce acting on a pile foundation are indirectly improved, and the test effect and the accuracy of an experiment are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation detection, and specifically proposes static load test equipment for pile foundation of construction engineering. Background Art

[0002] Pile foundation is a form of deep foundation, which is widely used in many fields such as construction engineering, bridge engineering, marine structure, etc. It transfers the load of the building to deeper and harder soil or rock to provide the necessary support and stability, thereby reducing the impact of soft soil on the surface on the building.

[0003] The main function of pile foundation is to increase the stability of the building's foundation structure, reduce settlement, and improve pull-out resistance. Therefore, the reliability of pile foundation is an important basis for ensuring the safety of buildings. During the construction of a building project, it is usually necessary to set up test piles to detect their reliability and stability. Relevant experiments include static load tests, and static load tests include single pile vertical compression static load tests, single pile vertical pull-out static load tests, and single pile horizontal static load tests. Among them, the single pile vertical compression static load test is used to detect the vertical compressive bearing capacity of the pile foundation.

[0004] Under the existing technology, the three common methods for conducting a single pile vertical compressive static load test are the pile loading method, the anchor pile method and the self-balancing method. Compared with the self-balancing method, the pile loading method and the anchor pile method are closer to the actual stress state of the pile foundation. The present invention provides a construction engineering pile foundation static load test equipment, which mainly uses the anchor pile method to conduct a single pile vertical compressive static load test. The anchor pile method mainly uses the cooperation of reaction beams and anchor piles to generate reaction force, which is applied to the pile foundation in the reverse direction to detect the compressive bearing capacity of the pile foundation. The existing anchor pile method equipment is similar, but generally has the following problems: (1) The anchor piles are mostly pre-cast concrete piles, which need to be prepared in advance, which reduces the flexibility and convenience of the test, and the test cycle is long. After the experiment is completed, the anchor piles are basically abandoned, which increases the test cost.

[0005] (2) In the static load test system of the anchor pile method, the anchor piles are mainly used as the basis for providing reaction force. The anchor piles are independent of each other. During the experiment, due to the different geological environments of the soil layers where each anchor pile is located, the reaction forces provided by different anchor piles are different, which in turn causes the positions of the reaction force acting on the test pile to be different, affecting the centrifugal force acting on the top of the test pile, thereby affecting the authenticity and accuracy of the experimental results to a certain extent.

[0006] (3) The overlap assembly method of the existing anchor pile method equipment is relatively random, and there is no structural design for quick disassembly and assembly, which makes the assembly difficult and inefficient, and also affects the safety of construction. In addition, most of them require additional supporting materials to support the equipment system, which affects convenience. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a construction engineering pile foundation static load test equipment, which is used to solve the problems mentioned in the above background technology.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme to achieve: a static load test equipment for pile foundation of construction engineering, comprising: four anchor piles, which can be screwed into and out of the soil layer; a series frame, which is serially connected and docked between the four anchor piles, and the series frame and the four anchor piles form an integral structure that together forms an anti-pulling force; a reaction beam group, comprising a main beam and two anchor pile beams relatively slidably mounted on the main beam, and the series frame is provided with a plurality of buffer support platforms that form buffer support for the main beam; four anti-pull assemblies, which are arranged in a one-to-one correspondence with the four anchor piles, each Two corresponding back-pull assemblies distributed on both sides of the main beam are detachably installed on the anchor pile beam; the anchor pile is a hollow structure, and a hanging slot is arranged in the hollow structure of the anchor pile, and the back-pull assembly includes a positioning component that can be correspondingly inserted in the hanging slot, when the positioning component is inserted in the hanging slot, the central axis of the back-pull assembly coincides with the central axis of the corresponding anchor pile, and the anchor pile can be suspended and docked on the insertion end of the positioning component; and a force-applying assembly, which is detachably installed on the main beam and placed on the test pile, and is used to apply an upward lifting force to the main beam.

[0009] Preferably, the anchor pile comprises: a top plate, the serial frame is connected to the top plate; and a screw pile fixed to the bottom end of the top plate, and the hollow structure of the anchor pile is opened from the top end of the top plate and extends to the inside of the screw pile.

[0010] Preferably, the serial frame includes: two inserted beams, which are distributed one by one below the two anchor beams, and the two inserted beams can be removably installed between the top plates of the two anchor piles below the corresponding anchor beams; the buffer support platform is correspondingly arranged on the two inserted beams; and a plurality of serial parts, which can be removably connected between the two inserted beams.

[0011] Preferably, the reverse pulling assembly also includes: a pressure plate, which is disc-shaped and horizontally slidably plug-in mounted on the top of the anchor beam; the positioning component is assembled at the center of the pressure plate; and a plurality of pull rods are circumferentially distributed around the center of the pressure plate; the plurality of pull rods are detachably connected to the pressure plate near the top end, and the bottom ends are fixed to the top plate.

[0012] Preferably, the positioning member includes: a screw rod vertically penetrating through the center of the pressure plate and threadedly installed on the pressure plate. A notch groove extending along the length direction is provided at one end of the anchor pile beam, and the screw rod passes through the notch groove; and a positioning insert block, which is cylindrical and coaxially rotatably installed at the bottom end of the screw rod. A plurality of supporting keys are provided on the side wall of the positioning insert block; the hanging slot includes a plurality of guiding grooves vertically extending from the top end of the top plate and a circumferential cutting groove communicated with the bottom ends of the guiding grooves. The plurality of supporting keys are correspondingly and slidably arranged in the plurality of guiding grooves; when the supporting keys are completely moved into the circumferential cutting groove, by rotating the positioning insert block, the supporting keys can avoid the guiding grooves, and the top end surface of the circumferential cutting groove can be lapped on the plurality of supporting keys.

[0013] Preferably, a plurality of jacks are circumferentially distributed on the top plate, and the depth of the jacks extends along the radial direction of the top plate; the opposing beam includes: a middle beam, which is a housing structure with open ends at both ends; the buffer supporting platform is fixed on the upper end surface of the middle beam; and two side beams, which are horizontally symmetrically arranged and one ends are respectively slidably installed at the two ports of the middle beam in a corresponding manner; the other ends of the side beams are provided with plug-in plates that are plugged and matched with the jacks.

[0014] Preferably, the force application assembly includes: a bearing plate for horizontally placing on the top end of the test pile; at least one hydraulic cylinder vertically fixed on the upper end surface of the bearing plate; and a supporting component fixed on the output end of the hydraulic cylinder and detachably fixed on the main beam.

[0015] Preferably, the supporting component includes: a supporting seat fixed on the output end of the hydraulic cylinder; a plugging column fixed on the top end surface of the supporting seat. The main beam is horizontally placed on the supporting seat, and the plugging column is plugged into the main beam from the bottom end of the main beam. A through hole is horizontally and jointly provided on the plugging column and the main beam; a plugging block is plugged through the through hole; and a locking plate, which is in a U shape, is inversely sleeved on the top end of the main beam, and both ends of the plugging block are fixed on the locking plate.

[0016] Preferably, a sleeve seat is fixed on the top end of the side beam; the connecting member is a connecting plug rod, and the connecting plug rod is plugged between the sleeve seats on two side beams in opposite positions in the two opposing beams.

[0017] The above technical scheme has the following advantages or beneficial effects: the present invention provides a static load test equipment for pile foundation of construction engineering, which adopts modular matching assembly design, can realize rapid assembly and overlap step by step and layer by layer, improves the standardization, convenience and safety of assembly construction, and reduces the difficulty of assembly and overlap of equipment system; in addition, in the equipment system, the recyclable anchor pile design replaces the existing pre-cast anchor pile structure, which can shorten the test cycle and reduce the test cost. A series connection frame is provided for docking with multiple anchor piles, and four anchor piles are connected in series through the series connection frame to form an anchor pile foundation frame that can jointly form a reaction force. The independence between the anchor piles is eliminated through the series connection, the integrity is enhanced, and the four anchor piles can be indirectly weakened. The difference of reaction force formed during the experiment is realized, the optimal distribution of reaction force is achieved, and the centration of the reaction force resultant force relative to the force-applying end of the test pile is enhanced; the buffer support structure added to the serial frame can assist the self-support of the reaction beam group, thereby enhancing the stability of the equipment structure; the stability and safety of the equipment during assembly and overlap are improved by adding positioning components to the counter-pull assembly, and the reaction structure formed in cooperation with the anchor pile is strengthened; in summary, the equipment provided by the present invention is improved based on the existing anchor pile test system, which improves the efficiency and safety of assembly and overlap, enhances the integrity of the equipment system, indirectly improves the centration and vertical concentration of the reaction force acting on the pile foundation, and enhances the test effect and accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings, which are not drawn to scale, with emphasis on illustrating the subject matter of the present invention.

[0019] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a static load test equipment for pile foundation of a construction project.

[0020] Figure 2 The present invention is a top view of a static load test device for pile foundation of a construction project.

[0021] Figure 3 yes Figure 2 Sectional view of AA.

[0022] Figure 4 yes Figure 2 Cross-sectional view of BB.

[0023] Figure 5 It is a three-dimensional cross-sectional view of the butt assembly of the back-pull assembly and the anchor pile.

[0024] Figure 6 It is a three-dimensional structural diagram of the serial frame.

[0025] Figure 7 It is a three-dimensional cross-sectional view of the assembly of the force-applying assembly and the main beam.

[0026] In the figure: 1, anchor pile; 11, top plate; 111, hanging slot; 112, plug hole; 12, spiral column; 2, serial frame; 21, plug beam; 211, middle beam; 212, side beam; 213, plug plate; 214, sleeve seat; 215, buffer support platform; 216, guide column; 217, support plate; 218, support spring; 22, serial plug rod; 3, reaction beam group; 3 1. Main beam; 32. Anchor beam; 321. Notch groove; 4. Back-pull assembly; 41. Pressure plate; 42. Positioning component; 421. Screw; 422. Positioning plug; 423. Support key; 43. Pull rod; 5. Force-applying assembly; 51. Pressure plate; 52. Hydraulic cylinder; 53. Support assembly; 531. Support seat; 532. Plug column; 533. Horizontal plug; 534. Locking plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, a static load test equipment for pile foundation of construction engineering is used for performing a single pile vertical compressive static load test on a concrete pile foundation, and for detecting the vertical compressive bearing capacity of the pile foundation. Specifically, the anchor pile method test method is adopted, and the equipment constitutes the test system; the equipment comprises four anchor piles 1 which can be easily recovered, and the anchor pile 1 comprises a top plate 11 and a spiral pile welded to the bottom end of the top plate 11, and the anchor pile 1 is a hollow structure, and the hollow structure of the anchor pile 1 is opened from the top of the top plate 11 and extends to the inside of the spiral pile, and the bottom end of the spiral pile is pointed; in the present invention, the recyclable anchor pile 1 replaces the existing prefabricated anchor pile 1 cast by concrete, and improves the installation convenience of the anchor pile 1 In order to facilitate installation and recyclability after use, during the experimental preparation process, the anchor pile 1 can be screwed into the foundation soil structure by the existing rotary pile driver (the top plate 11 is provided with a plug-in end that can be connected with the rotary end of the rotary pile driver), so that the four anchor piles 1 are reasonably distributed around the test pile, and the four anchor piles 1 are roughly distributed at the four vertexes of a virtual rectangle with the center position of the test pile as the intersection of the diagonals. It should be noted that the anchor pile 1 shown in the figure does not represent the actual length ratio. In actual use, according to the characteristics of the soil structure around the test pile, the anchor pile 1 of the corresponding length can be selected so that the anchor pile 1 can provide sufficient pull-out resistance to meet the experimental requirements.

[0030] like Figure 1 and Figure 2 As shown, in the anchor pile method test system for the single pile vertical compressive static load test constituted by the equipment provided by the present invention, in order to eliminate the independence between the existing anchor piles 1 and reduce the difference in the reaction force provided by the anchor piles 1, a series frame 2 is connected in series between the four anchor piles 1; the series frame 2 includes two pairs of inserted beams 21 and two series inserted rods 22, one pair of inserted beams 21 is connected between two of the anchor piles 1, and the other pair of inserted beams 21 is connected between the other two anchor piles 1.

[0031] like Figure 1 , Figure 4 and Figure 6As shown, four rectangular sockets 112 are evenly distributed on the top plate 11, and the depth of the sockets 112 extends radially along the top plate 11; the plug-in beams 21 include a middle beam 211 and two side beams 212, and the middle beam 211 is a shell structure with two opposite ends open; the two side beams 212 are horizontally symmetrically arranged and one end is respectively installed at the two ports of the middle beam 211 in a sliding fit; the other end of the side beam 212 is welded with a plug-in plate 213 that plugs and fits with the sockets 112. It should be noted here that in the process of screwing the anchor piles 1 into the soil layer, the four anchor piles 1 are at the same horizontal height, and the sockets 112 are in a relatively straightened state, so as to facilitate the subsequent docking assembly of the serial frame 2. A sleeve seat 214 is welded to the top of the side beam 212; the serial plug rod 22 is inserted between the sleeve seats 214 on the two side beams 212 in relative positions in the two plug-in beams 21. In the present invention, four anchor piles 1 are connected in series through a series frame 2 to form an anchor pile 1 basic frame that can jointly form a reaction force. The independence of the anchor piles 1 is eliminated through the series connection, and the integrity is enhanced. The difference in the reaction force formed during the experiment between the four anchor piles 1 can be indirectly weakened, and the optimal distribution of the reaction force is achieved, and the centration of the reaction force resultant force relative to the force-applying end of the test pile is enhanced.

[0032] After the four anchor piles 1 are driven into the foundation soil layer, the serial frame 2 can be docked and assembled. Specifically, the two plug-in beams 21 are connected in sequence first, and the plug-in beams 21 are placed between the two anchor piles 1. Then, the two side beams 212 are pulled outward, and the plug-in plate 213 is aligned with the insertion hole 112. Subsequently, the serial plug rod 22 is inserted between the two sleeve seats 214 in relative positions, thereby completing the rapid assembly of the serial frame 2.

[0033] like Figure 1 , Figure 3 and Figure 7As shown in the figure, a reaction beam group 3 can be installed on the basis of the series connection frame 2. The reaction beam group 3 includes a main beam 31 and two anchor pile beams 32 that are relatively slidably installed on the main beam 31. The two anchor pile beams 32 are distributed above the two inserted beams 21 in a one-to-one correspondence; a chute that is positioned and slidably matched with the middle part of the anchor pile beam 32 is arranged on the main beam 31, which is used to improve the stability and standardization of assembly and avoid simply stacking the anchor pile beams 32 on the main beam 31; a force application assembly 5 is centrally assembled on the main beam 31; the force application assembly 5 includes a bearing plate 51 horizontally placed on the top end of the test pile. In order to improve the uniformity of the jacking force application distribution, four hydraulic cylinders 52 are vertically welded and fixed on the upper end surface of the bearing plate 51. The bearing plate 51 is a square plate, and the four hydraulic cylinders 52 are circumferentially and evenly distributed around the center of the bearing plate 51; a support assembly 53 that is detachably fixed on the main beam 31 is jointly installed at the output ends of the four hydraulic cylinders 52. The support assembly 53 includes a support seat 531 horizontally welded at the output ends of the four hydraulic cylinders 52. A plug post 532 is centrally welded on the top end surface of the support seat 531. A plug hole that is matched with the plug post 532 is opened at the bottom end of the main beam 31. The main beam 31 is horizontally placed on the support seat 531, and the plug post 532 is inserted into the plug hole from the bottom end of the main beam 31. A rectangular through hole is horizontally and jointly opened through the plug post 532 and the main beam 31; a plug block is inserted through the through hole. The plug block realizes the locking between the plug post 532 and the main beam 31. A locking plate 534 in a U shape is inversely sleeved on the top end of the main beam 31. Both ends of the plug block are fixed on the locking plate 534 through bolts. The support assembly 53 improves the convenience of disassembly and assembly and ensures the reliability of the assembly connection with the main beam 31.

[0034] As Figure 1 , Figure 4 and Figure 6 shown in the figure, buffer support platforms 215 that buffer and support the main beam 31 are arranged on the middle beams 211 of the two inserted beams 21; the buffer support platforms 215 include a plurality of guide posts 216 vertically welded on the upper end surface of the middle beam 211. A support plate 217 is slidably installed in a cooperative manner among the plurality of guide posts 216. A support spring 218 is sleeved on the guide posts 216. Both ends of the support spring 218 are respectively welded on the middle beam 211 and the support plate 217.

[0035] When assembling and building the reaction beam group 3, first place the entire structure of the force assembly 5 except the cross-insertion block 533 and the locking plate 534 on the top surface of the test pile, then align and plug the main beam 31 with the plug-in column 532 through the crane equipment, and place it on the plane formed by the support seat 531 and the two support plates 217, then insert the cross-insertion block 533 and lock it through the locking plate 534, and finally hoist and install the two anchor beams 32 on the main beam 31. In the present invention, by setting and installing the buffer support platform 215, the system has its own auxiliary support structure to support the main beam 31, and there is no need to find other auxiliary support materials to support the main beam 31, which improves the safety of assembly and enhances convenience.

[0036] like Figure 4 and Figure 5 As shown, the two anchor beams 32 are assembled with anti-pull assemblies 4 near the two ends, and the four anti-pull assemblies 4 are arranged in a one-to-one correspondence with the four anchor piles 1; the anti-pull assembly 4 includes a disc-shaped pressure plate 41, and the anchor beam 32 is provided with a slide groove extending along its length direction, the pressure plate 41 is slidably matched with the slide groove of the anchor beam 32, and the pressure plate 41 is located at the top of the anchor beam 32; the pressure plate 41 is equipped with two groups of pull rods 43 distributed on both sides of the anchor beam 32, and the multiple pull rods 43 in each group are evenly distributed around the center of the pressure plate 41; the pull rod 43 vertically passes through the pressure plate 41, and the position of the pull rod 43 near the top is detachably connected to the pressure plate 41 through a nut, and the bottom end of the pull rod 43 is welded to the top plate 11.

[0037] like Figure 1 , Figure 4 and Figure 5 As shown, a positioning component 42 cooperating with the anchor pile 1 is installed at the center of the pressure plate 41, and the positioning component 42 includes a screw rod 421 vertically penetrating along the center of the pressure plate 41, and the screw rod 421 is threadedly mounted on the pressure plate 41, and a notch extending along the length direction is opened from the end of the anchor pile beam 32, and the screw rod 421 passes through the notch groove; a cylindrical positioning plug 422 is rotatably installed at the bottom end of the screw rod 421 through a bearing, and the positioning plug 422 is coaxially assembled with the screw rod 421; two supporting keys are arranged on the side wall of the positioning plug 422 423; a hanging slot 111 is provided in the hollow structure of the anchor pile 1, and the hanging slot 111 includes two guide grooves vertically extending from the top of the top plate 11 and an annular groove connected to the bottom of the guide groove, and two supporting keys 423 are arranged to slide in correspondence with the two guide grooves, and the width of the annular groove in the vertical direction is greater than the vertical length of the supporting key 423; when the supporting key 423 is completely moved into the annular groove, the supporting key 423 can avoid the guide groove by rotating the positioning plug 422, and the top end surface of the annular groove can overlap the two supporting keys 423.

[0038] After the reaction beam group 3 is assembled and built, the counter-pull assembly 4 can be assembled. Specifically, the pressure plate 41 can be slidably inserted and installed on the anchor beam 32. When the anchor beam 32 is in the hoisting state, on the one hand, the position of the anchor beam 32 is adjusted by sliding, and on the other hand, the position of the pressure plate 41 is adjusted by sliding so that the center of the pressure plate 41 is aligned with the center of the corresponding anchor pile 1 up and down. Then, the screw rod 421 can be rotated to make the positioning plug block 422 descend, and the positioning plug block 422 is rotated to align the supporting key 423 with the guide groove, and then it continues to descend, and the positioning plug block 422 is inserted into the hanging slot 111 until it descends until the supporting key 423 touches the annular groove. The corresponding insertion of the positioning component 42 and the anchor pile 1 can lock it. The pressure plate 41 is fixed in position, and the positioning block 422 is resisted downward, thereby indirectly forming auxiliary support for the anchor beam 32 through the positioning component 42, and then, the pull rods 43 are locked one by one, so that the nuts on the pull rods 43 are pressed against the pressure plate 41, and finally, the positioning block 422 is rotated first to make the supporting key 423 deviate from the guide groove, and then the screw 421 is rotated in the opposite direction to raise the positioning block 422 to the position where the annular groove overlaps the two supporting keys 423, so that the positioning component 42 can cooperate with the pull rod 43, and can jointly form a vertical pulling force on the anchor pile 1, thereby improving the stability of the reaction force formed by the anchor pile 1, and promoting the reaction force formed by the anchor pile 1 to be in a vertical direction, so as to improve the concentration and accuracy of the vertical compressive reaction force direction of the single pile.

[0039] It should be noted that the equipment provided by the present invention is the same as the existing anchor pile method experimental equipment in that it is also necessary to cooperate with the installation of existing test monitoring equipment to facilitate the monitoring and acquisition of experimental data. At least existing load sensors, pressure sensors, displacement meters, strain sensors and data acquisition systems need to be installed. Among them, the load sensor can be installed on the pressure plate 51 to directly and accurately monitor the force applied to the test pile foundation, the pressure sensor is used to monitor the pressure change of the hydraulic cylinder 52, the displacement meter is used to detect the settlement displacement of the pile foundation under pressure in real time, and the strain sensor can be pre-attached to the surface or inside of the test pile foundation to monitor the stress distribution of the pile foundation under pressure. The data acquisition system is used to collect and summarize the above various monitoring data for data storage, processing and subsequent analysis.

[0040] During the experiment, the lifting force of the four hydraulic cylinders 52 is gradually increased synchronously, so that the reaction force system formed by the equipment converts the lifting force applied by the hydraulic cylinders 52 into a downward pressure applied to the pile foundation, and the lifting force is gradually increased to a predetermined value, and the corresponding load is maintained for a period of time to make the pile foundation respond. The settlement displacement and settlement rate of the pile foundation under the corresponding load are observed and monitored, and whether structural damage occurs, etc. The vertical compressive static load capacity of the pile foundation is comprehensively analyzed through the data collected by experimental monitoring.

[0041] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A static load test equipment for pile foundation of construction engineering, characterized in that: include: Four anchor piles that can be screwed in and out of the soil; The serial frame is serially connected between the four anchor piles, and the serial frame and the four anchor piles together form an integral structure that resists pullout force; The reaction beam group includes a main beam and two anchor beams installed on the main beam in a relatively sliding manner. The serial frame is provided with a plurality of buffer support platforms for providing buffer support for the main beam. Four back-pull assemblies are arranged in a one-to-one correspondence with four anchor piles, and each anchor pile beam is detachably mounted with two back-pull assemblies distributed on both sides of the main beam; the anchor pile is a hollow structure, and a hanging slot is arranged in the hollow structure of the anchor pile, and the back-pull assembly includes a positioning component that can be correspondingly inserted in the hanging slot. When the positioning component is inserted in the hanging slot, the central axis of the back-pull assembly coincides with the central axis of the corresponding anchor pile, and the anchor pile can be suspended and docked on the insertion end of the positioning component; and a force-applying assembly, which is detachably mounted on the main beam and placed on the test pile to apply an upward lifting force to the main beam.

2. A construction engineering pile foundation static load test equipment according to claim 1, characterized in that: The anchor pile comprises: A top plate, the serial frame being butted against the top plate; and a screw pile fixed to the bottom end of the top plate, wherein the hollow structure of the anchor pile is opened from the top end of the top plate and extends to the inside of the screw pile.

3. A construction engineering pile foundation static load test equipment according to claim 2, characterized in that: The serial connection framework includes: Two plug-in beams are distributed one by one below the two anchor beams. Both plug-in beams can be detachably installed between the top plates of the two anchor piles below the corresponding anchor beams. The buffer support platform is correspondingly arranged on the two plug-in beams. And a plurality of serial connecting parts can be detachably connected between the two inserted beams.

4. A construction engineering pile foundation static load test equipment according to claim 2, characterized in that: The reverse pull assembly further comprises: The pressure plate is in the shape of a disk and is installed on the top of the anchor beam in a horizontal sliding and plug-in manner; the positioning component is assembled at the center of the pressure plate; And a plurality of tie rods are distributed circumferentially around the center of the pressure plate; the plurality of tie rods can be detachably connected to the pressure plate near the top ends, and the bottom ends are fixed on the top plate.

5. A construction engineering pile foundation static load test equipment according to claim 4, characterized in that: The positioning component comprises: The screw rod vertically penetrates the center of the pressure plate and is threadedly mounted on the pressure plate. The anchor beam is provided with a notch groove extending along its length from the end thereof, and the screw rod passes through the notch groove; And a positioning block, which is cylindrical and coaxially arranged and rotatably installed at the bottom end of the screw, and a plurality of supporting keys are arranged on the side wall of the positioning block; the hanging slot includes a plurality of guide grooves extending vertically from the top end of the top plate and annular grooves connected to the bottom ends of the guide grooves, and a plurality of supporting keys are arranged to slide in correspondence with the plurality of guide grooves; when the supporting key is completely moved into the annular groove, the supporting key can avoid the guide groove by rotating the positioning block, and the top end surface of the annular groove can overlap on the plurality of supporting keys.

6. The construction engineering pile foundation static load test equipment according to claim 3, characterized in that: The top plate is provided with a plurality of insertion holes distributed circumferentially, and the depth of the insertion holes extends radially along the top plate; the pair of insertion beams comprises: The middle beam is a shell structure with two opposite ends open; the buffer support platform is fixed on the upper end surface of the middle beam; And two side beams are arranged horizontally and symmetrically, and one end of which is respectively installed at the two ports of the middle beam in a sliding manner; the other end of the side beam is provided with a plug-in board that is plug-in-matched with the plug-in socket.

7. The static load test equipment for pile foundation of construction engineering according to claim 1, characterized in that: The force application assembly comprises: A bearing plate, which is used to be placed horizontally on the top of the test pile; At least one hydraulic cylinder is vertically fixed on the upper end surface of the pressure plate; And a supporting component, which is fixed to the output end of the hydraulic cylinder and detachably fixed to the main beam.

8. The construction engineering pile foundation static load test equipment according to claim 7, characterized in that: The supporting component includes: A supporting seat, which is fixed to the output end of the hydraulic cylinder; A plugging column, which is fixed to the top surface of the supporting seat. The main beam is horizontally placed on the supporting seat, and the plugging column is inserted into the inside of the main beam from the bottom end of the main beam. A through hole is horizontally formed through the plugging column and the main beam in cooperation; A plugging block, which is inserted through the through hole; And a locking plate, which is in a U shape, is inversely sleeved on the top of the main beam, and both ends of the plugging block are fixed to the locking plate.

9. The construction engineering pile foundation static load test equipment according to claim 6, characterized in that: A sleeve seat is fixed to the top end of the side beam; the connecting member is a connecting plug rod, and the connecting plug rod is inserted between the sleeve seats on two side beams in opposite positions in the two opposing beams.

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