CN111560998A - Equipment for pile foundation self-balancing detection and detection method using equipment - Google Patents
Equipment for pile foundation self-balancing detection and detection method using equipment Download PDFInfo
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- CN111560998A CN111560998A CN202010562242.5A CN202010562242A CN111560998A CN 111560998 A CN111560998 A CN 111560998A CN 202010562242 A CN202010562242 A CN 202010562242A CN 111560998 A CN111560998 A CN 111560998A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means
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Abstract
The invention relates to a device for pile foundation self-balancing detection and a detection method using the device, which comprises a reinforcement cage, an annular load box arranged in the reinforcement cage, a displacement measuring device arranged above the ground and capable of detecting the displacement of a pile body, and an oil pump arranged above the ground and pumping hydraulic oil into the load box, wherein the reinforcement cage sequentially comprises an upper reinforcement cage from high to low along the height direction of the reinforcement cage, well steel reinforcement cage, lower steel reinforcement cage, the bottom of lower steel reinforcement cage and well steel reinforcement cage all sets up annular load case, and the steel reinforcement cage outside sets up the guiding mechanism who makes orientation between lower steel reinforcement cage and well steel reinforcement cage and the last steel reinforcement cage and be connected, possesses and can carry out a comparatively comprehensive detection to upper segment stake, middle section stake, hypomere stake through setting up two annular load cases for detect the effect that data can more comprehensively react the bearing capacity performance of pile foundation.
Description
Technical Field
The invention relates to the technical field of pile foundation detection, in particular to equipment for pile foundation self-balancing detection and a detection method using the equipment.
Background
The self-balancing method pile foundation detection is characterized in that a load box is arranged at the bottom of a pile body, a pressure applying oil pipe and a displacement measuring device are connected to the top of the pile, after concrete is cured to a standard age, a top high-pressure oil pump is used for applying pressure to the bottom load box, the frictional resistance of the pile body on the upper portion of the load box is balanced with the frictional resistance and the end resistance of the pile body on the lower portion of the load box to maintain loading, and therefore the pile foundation bearing capacity is obtained.
The existing self-balancing static load type pile foundation testing device and construction method are disclosed, wherein the bulletin number is CN110056019A, the device comprises an upper steel bar frame and a lower steel bar frame, a plurality of load boxes are arranged between the upper steel bar frame and the lower steel bar frame, the outer side walls of the load boxes are respectively and fixedly connected with upper stirrups and lower stirrups, one ends of the upper steel bar frame are fixedly connected with the upper stirrups, one ends of the lower steel bar frame are fixedly connected with the lower stirrups, a hydraulic oil pump is arranged on the outer side of the upper steel bar frame, oil pipes are arranged on the load boxes, one ends of the oil pipes are connected to the load boxes, one ends, far away from the load boxes, of the oil pipes extend along the length direction of the upper steel bar frame and are connected with the hydraulic oil pump on the outer side of the upper steel bar frame, a.
The above prior art solutions have the following drawbacks: when the test is carried out, the bearing capacity of the end part of the pile body or a certain part of the pile body can be measured, and the whole bearing performance of the pile body, which can be reflected by test data, has great limitation.
Disclosure of Invention
In view of the defects in the prior art, one of the purposes of the present invention is to provide a device for pile foundation self-balancing detection, which has the effect of better reflecting the overall bearing performance of the pile body.
The above object of the present invention is achieved by the following technical solutions:
a equipment for pile foundation self-balancing detects, including steel reinforcement cage, locate the annular load case in the steel reinforcement cage, locate ground top and can carry out the displacement measuring device that the displacement detected to the pile body, locate ground top and to the load case in pump into the oil pump of hydraulic oil, locate the reinforcement meter of steel reinforcement cage owner muscle, locate the cable pipe that steel reinforcement cage inner wall and supply the reinforcement meter cable to wear to establish, the steel reinforcement cage includes steel reinforcement cage, well steel reinforcement cage, lower steel reinforcement cage from high to low along self direction of height in proper order, and the upper end of lower steel reinforcement cage and well steel reinforcement cage all sets up annular load case.
By adopting the technical scheme, when a loading test is carried out, the annular loading box of the lower reinforcement cage loads the pile body positioned at the lower reinforcement cage through the oil pump until the downward displacement of the pile body at the lower reinforcement cage is increased steeply, then the pile body positioned at the middle reinforcement cage is loaded through the annular loading box of the middle reinforcement cage and the load of the annular loading box positioned at the lower reinforcement cage is kept unchanged, the pile body of the lower reinforcement cage can not influence the measurement of the ultimate bearing capacity of the pile body of the middle reinforcement cage until the downward displacement of the pile body at the middle reinforcement cage is increased steeply, finally the pile body at the upper reinforcement cage is loaded through the annular loading box at the middle reinforcement cage, the pile bodies at the middle reinforcement cage and the lower reinforcement cage provide counter force together until the upward displacement of the pile body at the upper reinforcement cage is increased steeply, different limit bearing capacities of the pile bodies positioned in the upper reinforcement cage, the middle reinforcement cage and the lower reinforcement cage can be obtained.
The present invention in a preferred example may be further configured to: go up the steel reinforcement cage and include that several sections go up the steel reinforcement cage segmentation, the last steel reinforcement cage segmentation upper end outer wall fixedly connected with length of the position and whole go up several directional bars that steel reinforcement cage length equals, locate steel reinforcement cage segmentation bottom outer wall and can follow the several directional sleeve pipe that last steel reinforcement cage length direction one-to-one cup jointed in each directional bar.
Through adopting above-mentioned technical scheme, will go up the steel reinforcement cage and divide into the segmentation of steel reinforcement cage on several sections, avoid steel reinforcement cage overall process to transfer simultaneously more difficult, and the steel reinforcement cage atress self structure of overlength is destroyed easily, pegs graft the directional sleeve pipe corresponding to the guide bar for put the segmented in-process of steel reinforcement cage on every section down, be difficult to the condition that positional deviation appears.
The present invention in a preferred example may be further configured to: the adjacent two last steel reinforcement cage subsection near-end all is equipped with a set of perpendicular to and goes up steel reinforcement cage length direction's butt, and every group butt sets up two, and the butt upper surface fixed connection that highly hangs down in two butts of the same group is perpendicular to the butt sleeve pipe of butt upper surface, and highly hangs down highly in two butts of the same group is connected with the butt intubate that can peg graft in the butt sleeve pipe.
Through adopting above-mentioned technical scheme, the butt plate can be so that adjacent go up possess better bearing capacity between the steel reinforcement cage segmentation, and the grafting effect between bottom plate intubate and the bottom plate sleeve pipe makes the back of transferring of steel reinforcement cage segmentation on accomplishing each section simultaneously, promotes the anti rotation ability of steel reinforcement cage segmentation, and the random rotation of avoiding going up the steel reinforcement cage segmentation makes the oil pipe of cable pipe and oil pump and go up the joint strength between the steel reinforcement cage segmentation inner wall decline easily.
The present invention in a preferred example may be further configured to: annular load case includes the load case upper portion that the several evenly set up with the steel reinforcement cage axis, along the inseparable sliding connection in several load case lower part on each load case upper portion of last steel reinforcement cage length direction one-to-one, fixed connection is in the peripheral outer ring board of going up in the outside on load case upper portion, fixed connection is in the peripheral outer ring board down in load case lower part outside, fixed connection is in the inboard peripheral inner ring board of load case upper portion, fixed connection is in the inboard peripheral inner ring board down in load case lower part, go up the equal fixed connection of outer ring board and lower outer ring board in the inner wall of steel reinforcement cage, go up outer ring board and steel reinforcement cage inner wall junction and the inner wall junction of outer ring board and steel reinforcement cage down and all set up the strengthening rib that is L shape.
Through adopting above-mentioned technical scheme for after the oil pump is gone into hydraulic oil to load case upper portion and load case lower part in, transmit the steel reinforcement cage for the difference respectively through lower outer circular plate and upper outer circular plate, make the load can be better more even transmit for the pile body, make the load increase steadily or the uninstallation, the joint strength of upper outer circular plate and lower outer circular plate between the steel reinforcement cage has further been strengthened to the strengthening rib simultaneously, guarantee can not break away from when guaranteeing that steel reinforcement cage and load case lift by crane.
The present invention in a preferred example may be further configured to: the inner wall department that the steel reinforcement cage is located load case upper portion top is the slope and keeps away from steel reinforcement cage one end fixedly connected in last interior ring plate's several last horn muscle around the even fixedly connected with of steel reinforcement cage axis, and the inner wall department that the steel reinforcement cage is located load case upper portion below is the slope and keeps away from steel reinforcement cage one end fixedly connected in the several lower horn muscle of interior ring plate down around the even fixedly connected with of steel reinforcement cage axis.
Through adopting above-mentioned technical scheme for when annular loading case loading, avoid making because of the pile body local pressure of annular loading case department too big and go up the excircle crown plate or the connection between excircle crown plate and the steel reinforcement cage inner wall appears removing, lead to the load to transmit the pile body well, can play the strengthening effect, the position of cable pipe still can be restricted to the loudspeaker muscle simultaneously, possesses the guide effect, make cable pipe or oil pump oil pipe pass from annular loading case more easily.
The present invention in a preferred example may be further configured to: lie in annular load case with the same one side and the same all of high position lower equal fixedly connected with in loudspeaker muscle both ends orientation annular load case's small circle ring muscle and keep away from annular load case's big ring muscle, small circle ring muscle fixed connection is in interior ring plate down, big ring muscle fixed connection in steel reinforcement cage inner wall.
Through adopting above-mentioned technical scheme for the position aligns more between the loudspeaker muscle, avoids needing the manual work to weld in steel reinforcement cage department root, and the condition of misalignment appears in comparatively inconvenient and loudspeaker muscle position easily, also can increase with last interior annular plate or down the area of contact between the interior annular plate, makes loudspeaker muscle joint strength more increase.
The present invention in a preferred example may be further configured to: the coaxial fixed connection in the main muscle of steel reinforcement cage in reinforcement meter both ends, two with the equal fixedly connected with in reinforcement meter length direction both ends and the steel reinforcement cage main muscle junction tie up a reinforcing bar that the symmetry set up, the steel reinforcement meter outer wall has cup jointed the cotton yarn cover.
Through adopting above-mentioned technical scheme, two tie up a reinforcing bar and make reinforcing bar meter and steel reinforcement cage owner muscle connect inseparabler, ensure that the connection between reinforcing bar meter and the steel reinforcement cage can not break off, and cotton yarn cover makes can water cold water on the cotton yarn cover when carrying out the welded fastening of reinforcing bar meter simultaneously, avoids the reinforcing bar meter to receive too high temperature and takes place to damage easily.
The present invention in a preferred example may be further configured to: the displacement measuring device comprises two reference piles which are symmetrically arranged by taking the axis of the steel reinforcement cage as a central line, a horizontal reference beam which is arranged at the upper ends of the two reference piles, and an electronic displacement sensor which is detachably connected to the reference beam, wherein the axis of the steel reinforcement cage passes through the central point of the reference beam.
Through adopting above-mentioned technical scheme for the benchmark roof beam possesses better stability, and two benchmark piles make the benchmark roof beam be difficult to produce and rock.
The present invention in a preferred example may be further configured to: one end of the datum beam in the length direction is hinged to the upper end of one datum pile, and the other upper end of the datum beam is fixedly connected to the upper end of the other datum pile.
By adopting the technical scheme, the reference beam can not shake greatly relative to the reference pile, and the hinged end of the reference beam can rotate relative to the reference pile when the reference beam is stressed in the length direction, so that the reference beam cannot be bent easily as far as possible, and the deformation degree caused by the overall stress resistance between the reference beam and the reference pile can be reduced.
Another object of the present invention is to provide a method for testing a self-balancing testing apparatus of a pile foundation, which has the effect of better reflecting the overall bearing performance of the pile body.
The above object of the present invention is achieved by the following technical solutions:
the detection method of the equipment applying the pile foundation self-balancing detection specifically comprises the following steps:
step 4, measuring and reading displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th minutes in 1 hour of loading and unloading of each level of load, then measuring and reading displacement at every 30 minutes, and after the load is stabilized, loading or unloading the next level;
6, measuring and reading the displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th minutes in 1 hour of loading and unloading each level of load, then measuring and reading the displacement at every 30 minutes, and after the load is stabilized, loading or unloading the next level;
and 8, measuring and reading the displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th within 1 hour of loading and unloading of each stage of load, then measuring and reading the displacement at every 30 minutes, and after the stability is reached, loading or unloading the next stage.
By adopting the technical scheme, the pile body sections at the upper reinforcement cage, the middle reinforcement cage and the lower reinforcement cage can be comprehensively measured, the integral bearing performance of the pile body can be better reflected, and meanwhile, the slow loading is helpful for accurately obtaining the ultimate bearing capacity value of the pile body.
In summary, the invention includes at least one of the following beneficial technical effects:
when loading test is carried out, the annular loading box of the lower reinforcement cage is firstly loaded on the pile body at the position of the lower reinforcement cage through the oil pump until the pile body at the position of the lower reinforcement cage is displaced and steeply increased downwards, then the pile body positioned at the middle reinforcement cage is loaded through the annular loading box of the middle reinforcement cage and the load of the annular loading box positioned at the lower reinforcement cage is kept unchanged, the pile body of the lower reinforcement cage can not influence the measurement of the ultimate bearing capacity of the pile body of the middle reinforcement cage until the downward displacement of the pile body at the middle reinforcement cage is increased steeply, finally the pile body at the upper reinforcement cage is loaded through the annular loading box at the middle reinforcement cage, the pile bodies at the middle reinforcement cage and the lower reinforcement cage provide counter force together until the upward displacement of the pile body at the upper reinforcement cage is increased steeply, different ultimate bearing capacities of three sections of pile bodies positioned at the upper reinforcement cage, the middle reinforcement cage and the lower reinforcement cage can be obtained;
the pile body sections at the upper reinforcement cage, the middle reinforcement cage and the lower reinforcement cage can be comprehensively measured, the integral bearing performance of the pile body can be better reflected, and meanwhile, the slow loading is helpful for accurately obtaining the ultimate bearing capacity value of the pile body.
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 1;
fig. 4 is an enlarged view at C in fig. 1.
In the figure, 1, a reinforcement cage; 2. an annular load box; 3. a displacement measuring device; 4. an oil pump; 5. putting a reinforcement cage; 51. covering cotton yarns; 52. a cable tube; 53. a reference pile; 54. a reference beam; 55. an electronic displacement sensor; 56. segmenting an upper reinforcement cage; 6. a middle reinforcement cage; 61. a lower outer circular plate; 62. reinforcing ribs; 63. an upper inner circular plate; 64. a lower inner circular plate; 65. mounting a horn rib; 66. a lower horn rib; 67. small circular ring ribs; 68. a large circular rib; 69. binding the steel bars; 7. lowering a reinforcement cage; 71. an orientation bar; 72. orienting the cannula; 73. a steel bar meter; 74. a resisting plate; 75. a butt plate sleeve; 76. inserting a tube through a butt plate; 77. the upper part of the load box; 78. the lower part of the load box; 79. and (4) an upper outer circular plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1 and 2, the equipment for pile foundation self-balancing detection disclosed by the invention comprises a vertical steel reinforcement cage 1 with a circular cross section, an annular load box 2 is installed on the inner wall of the steel reinforcement cage 1 and can load a pile body, the annular load box 2 is installed on the ground, an oil pump 4 for pumping hydraulic oil into the annular load box 2 through an oil pipe welded on the inner wall of the steel reinforcement cage 1 is installed above the ground, a displacement measuring device 3 capable of detecting the displacement of the pile body is installed right above the steel reinforcement cage 1, a steel reinforcement meter 73 for detecting the stress borne by the steel reinforcement when the pile body bears the loading of the annular load box 2 is coaxially welded at the vertical main reinforcement of the steel reinforcement cage 1, two binding steel reinforcements 69 are welded at the joint of the steel reinforcement meter 73 and the main reinforcement of the steel reinforcement cage 1, the two binding steel reinforcements 69 are symmetrically arranged by taking the steel reinforcement meter 73 as a central line, a cotton yarn sleeve 51 is, the cable pipe 52 which is vertical and is used for a reinforcing bar meter 73 cable to penetrate is welded on the outer wall of the reinforcing bar cage 1, and the reinforcing bar meter 73 is GJJ-32 of Changzhou prefei electronic engineering instrument company Limited.
Referring to fig. 1, the displacement measuring device 3 comprises two reference piles 53 symmetrically driven into the ground by taking the axis of the steel reinforcement cage 1 as a central line, a horizontal reference beam 54 is installed at the upper end of the reference pile 53, the reference beam 54 and the reference pile 53 are H-shaped steel, the axis of the steel reinforcement cage 1 passes through the central point of the reference beam 54, one end of the reference beam 54 in the length direction is hinged to the reference pile 53, the other end of the reference beam 54 is fixedly connected to the upper end of the other reference pile 53, the reference beam 54 is positioned right above the steel reinforcement cage 1 and is detachably connected with an electronic displacement sensor 55 for measuring the displacement of a pile body through a magnetic gauge stand, the model of the electronic displacement sensor 55 is RS-WS50 produced by Wuhan's Seawa engineering technology Limited, and the reading measurement can.
Referring to fig. 1, the reinforcement cage 1 includes an upper reinforcement cage 5, a middle reinforcement cage 6, and a lower reinforcement cage 7 in sequence from high to low along the height direction thereof, the annular load box 2 is provided at the upper ends of the lower reinforcement cage 7 and the middle reinforcement cage 6, meanwhile, the ultimate bearing capacity value of the pile body at the upper reinforcement cage 5 is required to be smaller than or equal to the ultimate bearing capacity values of the pile bodies at the middle reinforcement cage 6 and the lower reinforcement cage 7, the ultimate bearing capacity value of the pile body at the lower reinforcement cage 7 is required to be smaller than or equal to the ultimate bearing capacity values of the pile bodies at the middle reinforcement cage 6 and the upper reinforcement cage 5, the ultimate bearing capacity value at the middle reinforcement cage 6 is smaller than the ultimate bearing capacity value at the upper reinforcement cage 5, and the annular load box 2 is ensured to be loaded, the displacement measuring device 3 can obtain correct pile body displacement data, and the vertical main reinforcements of the middle reinforcement cage 6, the lower reinforcement cage 7, the middle reinforcement cage 6 and the upper reinforcement cage 5 at the annular load box 2 are cut off.
Referring to fig. 1 and 3, since the two annular load cells 2 and the two annular load cells 2 are arranged in the same manner at the reinforcement cages, the lower reinforcement cage 7 and the middle reinforcement cage 6 are taken as an example, the annular load cell 2 includes six load cell lower portions 78 uniformly arranged around the axis of the lower reinforcement cage 7, each load cell lower portion 78 is closely slidably connected with a load cell upper portion 77 in the vertical direction, the six load cell upper portions 77 are fixedly connected with an upper outer annular plate 79 in the vertical and end-level direction at the position facing away from the axis of the middle reinforcement cage 6, the six load cell upper portions 77 are fixedly connected with an upper inner annular plate 63 in the vertical and end-level direction at the position facing the axis of the middle reinforcement cage 6, the end surfaces of the upper inner annular plate 63 and the upper outer annular plate 79 are flush with each other, the six load cell lower portions 78 are fixedly connected with a lower outer annular plate 61 in the vertical and end-level direction at the position facing away from the axis of the lower reinforcement, six load case lower part 78 are vertical and terminal surface horizontally lower inner circular ring board 64 towards the same one of axis fixedly connected with of lower steel reinforcement cage 7, the terminal surface of lower inner circular ring board 64 and lower outer circular ring board 61 flushes, the even welding of the axis of lower steel reinforcement cage 7 of all having several strengthening rib 62 that is L shape of lower outer circular ring board 61 and upper outer circular ring board 79 outside wall side, strengthening rib 62 welds in the inner wall of steel reinforcement cage 6, the vertical both ends of strengthening rib 62 that are located lower outer circular ring board 61 and upper outer circular ring board 79 two back of the body and set up mutually.
Referring to fig. 1 and 3, a plurality of inclined upper horn bars 65 are uniformly and fixedly connected to the middle reinforcement cage 6 near the upper portion 77 of the load box, a plurality of inclined lower horn bars 66 are uniformly and fixedly connected to the lower reinforcement cage 7 near the lower portion 78 of the load box, the upper end of each lower horn bar 66 is near the axis of the lower reinforcement cage 7, a large annular rib 68 having a circular shape and the same axis as the middle reinforcement cage 6 is welded to the opposite end of each lower horn bar 66 and the upper horn bar 65, the large annular rib 68 of each upper horn bar 65 is welded to the inner wall of the middle reinforcement cage 6, the large annular rib 68 of each lower horn bar 66 is welded to the inner wall of the lower reinforcement cage 7, and a small annular rib 67 having a circular shape and the same axis as the middle reinforcement cage 6 is fixedly connected to the adjacent end of each lower horn bar 66 and the upper horn bar 65, the small circular ring rib 67 of the upper horn rib 65 is welded at the upper end face of the upper inner circular ring plate 63, and the small circular ring rib 67 of the lower horn rib 66 is welded at the lower end face of the lower inner circular ring plate 64.
Referring to fig. 1 and 4, the upper reinforcement cage 5 includes a plurality of upper reinforcement cage segments 56, the upper reinforcement cage segment 56 with the lowest height and the middle reinforcement cage 6 are connected through the annular load box 2, the outer wall of the upper end of the upper reinforcement cage segment 56 with the lowest height is uniformly and fixedly connected with two directional rods 71 with the same length as the whole upper reinforcement cage 5 around the axis thereof, the outer wall of the upper reinforcement cage segment 56 far away from the middle reinforcement cage 6 is fixedly connected with two directional sleeves 72 which can be sleeved on the two directional rods 71 respectively along the vertical direction, the near end of the adjacent upper reinforcement cage segment 56 is welded with a horizontal and butted resisting plate 74, the resisting plate 74 is annular, the lower surface of the resisting plate 74 of the upper reinforcement cage segment 56 with the high position is uniformly and fixedly connected with four vertical resisting plate inserting pipes 76 around the axis of the upper reinforcement cage segment 56, the upper surface of the resisting plate 74 of the upper reinforcement cage segment 56 with the low position is uniformly and fixedly connected with four vertical resisting plate sleeves 75 around the axis of the upper reinforcement cage segment, the upper surfaces of the abutting plate sleeves 75 are flush with the upper surfaces of the abutting plates 74 which are connected, and the four abutting plate inserting pipes 76 are correspondingly inserted into the four abutting plate sleeves 75 along the vertical direction.
Example two:
the detection method of the equipment applying the pile foundation self-balancing detection specifically comprises the following steps:
step 4, measuring and reading displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th minutes in 1 hour of loading and unloading of each level of load, then measuring and reading displacement at every 30 minutes, and after the load is stabilized, loading or unloading the next level;
6, measuring and reading the displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th minutes in 1 hour of loading and unloading each level of load, then measuring and reading the displacement at every 30 minutes, and after the load is stabilized, loading or unloading the next level;
and 8, measuring and reading the displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th within 1 hour of loading and unloading of each stage of load, then measuring and reading the displacement at every 30 minutes, and after the stability is reached, loading or unloading the next stage.
The implementation principle of the embodiment is as follows: when a loading test is carried out, firstly, the annular load box 2 of the lower reinforcement cage 7 is used for loading the pile body at the lower reinforcement cage 7 through the oil pump 4 until the pile body at the lower reinforcement cage 7 is displaced and steeply increased downwards, then the pile body at the middle reinforcement cage 6 is loaded through the annular load box 2 of the middle reinforcement cage 6 and the annular load box 2 at the lower reinforcement cage 7 is kept for applying the limit load of the pile body of the lower reinforcement cage 7 to the pile body of the lower reinforcement cage 7, so that the pile body of the lower reinforcement cage 7 can not influence the limit bearing capacity measurement of the pile body of the middle reinforcement cage 6 until the pile body at the middle reinforcement cage 6 is displaced and steeply increased downwards, finally, the pile body at the upper reinforcement cage 5 is loaded through the annular load box 2 at the middle reinforcement cage 6, the pile bodies of the middle reinforcement cage 6 and the lower reinforcement cage 7 are jointly provided until the pile body at the upper reinforcement cage 5 is displaced and steeply increased upwards, different limit bearing capacities of three sections of pile bodies positioned at the upper reinforcement cage 5, the middle reinforcement cage 6 and the lower reinforcement cage 7 can be obtained.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A equipment for pile foundation self-balancing detects, including steel reinforcement cage (1), locate annular load case (2) in steel reinforcement cage (1), locate the ground top and can carry out displacement measurement device (3) that the displacement detected to the pile body, locate the ground top and to pump into oil pump (4) of hydraulic oil in load case (2), locate steel reinforcement cage (1) main muscle's bar meter (73), locate steel reinforcement cage (1) inner wall and supply cable pipe (52) that steel reinforcement meter (67) cable was worn to establish, its characterized in that: the steel reinforcement cage (1) includes steel reinforcement cage (5), well steel reinforcement cage (6), lower steel reinforcement cage (7) from high to low along self direction of height in proper order, and the upper end of lower steel reinforcement cage (7) and well steel reinforcement cage (6) all sets up annular load case (2).
2. The apparatus for self-balancing detection of pile foundations of claim 1, wherein: go up steel reinforcement cage (5) including several sections go up steel reinforcement cage segmentation (56), the last steel reinforcement cage segmentation (56) of position upper end outer wall fixedly connected with length and whole last steel reinforcement cage (5) length equal several directional bars (71), locate steel reinforcement cage segmentation (56) bottom outer wall and can follow several directional sleeve pipe (72) that last steel reinforcement cage (5) length direction one-to-one cup jointed in each directional bar (71).
3. The apparatus for self-balancing detection of pile foundations of claim 2, wherein: two adjacent go up steel reinforcement cage segmentation (56) looks near-end all is equipped with a set of perpendicular to and goes up steel reinforcement cage (5) length direction's support board (74), and every group supports board (74) and sets up two, and two in the same group support board (74) high-altitude support board (74) upper surface fixedly connected with is perpendicular to support board sleeve pipe (75) of supporting board (74) upper surface, and the high support board (74) lower surface fixedly connected with in the support board sleeve pipe (76) of supporting board sleeve pipe (75) of supporting board (74) of the same group.
4. The apparatus for self-balancing detection of pile foundations of claim 3, wherein: the annular load box (2) comprises a plurality of load box upper parts (77) which are uniformly arranged along the axis of the steel reinforcement cage (1), a plurality of load box lower parts (78) which are in one-to-one correspondence and are in tight sliding connection with each load box upper part (77) along the length direction of the upper steel reinforcement cage (5), an upper outer circular plate (79) which is fixedly connected with the periphery of the outer side of the load box upper part (77), a lower outer circular plate (61) which is fixedly connected with the periphery of the outer side of the load box lower part (78), an upper inner circular plate (63) which is fixedly connected with the periphery of the inner side of the load box upper part (77), and a lower inner circular plate (64) which is fixedly connected with the, the upper outer circular plate (79) and the lower outer circular plate (61) are both fixedly connected with the inner wall of the reinforcement cage (1), the joint of the upper outer circular plate (79) and the inner wall of the steel reinforcement cage (1) and the joint of the lower outer circular plate (61) and the inner wall of the steel reinforcement cage (1) are provided with L-shaped reinforcing ribs (62).
5. The apparatus for self-balancing detection of pile foundations of claim 4, wherein: inner wall department that steel reinforcement cage (1) is located load case upper portion (77) top is slope and keeps away from steel reinforcement cage (1) one end fixed connection in last interior crown plate (63) several last horn bar (65) around the even fixedly connected with of steel reinforcement cage (1) axis, and steel reinforcement cage (1) is located the inner wall department of load case upper portion (77) below and is slope and keep away from steel reinforcement cage (1) one end fixed connection in the several lower horn bar (66) of interior crown plate (64) down around the even fixedly connected with of steel reinforcement cage (1) axis.
6. The apparatus for self-balancing detection of pile foundations of claim 5, wherein: lie in annular load case (2) with the same side and all that the high position is the same loudspeaker muscle (66) both ends equal fixedly connected with orientation annular load case (2) small circle ring muscle (67) and keep away from annular load case (2) big ring muscle (68), small circle ring muscle (67) fixed connection is in interior ring plate (64) down, big ring muscle (68) fixed connection is in steel reinforcement cage (1) inner wall.
7. The apparatus for self-balancing detection of pile foundations of claim 6, wherein: the coaxial fixed connection in the main muscle of steel reinforcement cage (1) in steel reinforcement meter (73) both ends, steel reinforcement meter (73) length direction both ends and steel reinforcement cage (1) main muscle equal fixedly connected with of junction carry out tying up a reinforcing bar (69) that the symmetry set up with steel reinforcement meter (73) axis for two, and steel reinforcement meter (73) outer wall has cup jointed cotton yarn cover (51).
8. The apparatus for self-balancing detection of pile foundations of claim 7, wherein: the displacement measuring device (3) comprises two reference piles (53) which are symmetrically arranged by taking the axis of the steel reinforcement cage (1) as a central line, a horizontal reference beam (54) which is arranged at the upper ends of the two reference piles (53), and an electronic displacement sensor (55) which is detachably connected to the reference beam (54), wherein the axis of the steel reinforcement cage (1) passes through the central point of the reference beam (54).
9. The apparatus for self-balancing detection of pile foundations of claim 8, wherein: one end of the reference beam (54) in the length direction is hinged to the upper end of one reference pile (53), and the other upper end of the reference beam (54) is fixedly connected to the upper end of the other reference pile (53).
10. The detection method of the equipment applying the pile foundation self-balancing detection is characterized in that: the method specifically comprises the following steps:
step 1, a lower reinforcement cage (7), a middle reinforcement cage (6) and one section of upper reinforcement cage section (56) are lowered, a directional sleeve (72) of the other upper reinforcement cage section (56) is correspondingly inserted and lowered corresponding to a directional rod (71), and lowering of all the upper reinforcement cage sections (56) is completed in sequence;
step 2, pouring a pile, and waiting for at least 28 days;
step 3, loading the annular load box (2) of the lower reinforcement cage (7) to the pile body of the lower reinforcement cage (7) through the oil pump (4) until the displacement is increased steeply, then unloading, wherein the loading and the unloading adopt graded loading and graded unloading respectively, and the loading amount and the unloading amount of each grade are 1/15 of the maximum loading amount of the annular load box (2);
step 4, measuring and reading displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th minutes in 1 hour of loading and unloading of each level of load, then measuring and reading displacement at every 30 minutes, and after the load is stabilized, loading or unloading the next level;
step 5, keeping the annular load box (2) at the lower reinforcement cage (7) to load the pile body through an oil pump (4), simultaneously loading the pile body of the middle reinforcement cage (6) to the pile body of the middle reinforcement cage (6) through the annular load box (2) of the middle reinforcement cage, and then carrying out the displacement steep increase on the pile body of the middle reinforcement cage (6), wherein the loading and the unloading are respectively carried out by adopting the step loading and the step unloading, and the loading amount and the unloading amount of each step are 1/15 of the maximum loading amount of the annular load box (2);
6, measuring and reading the displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th minutes in 1 hour of loading and unloading each level of load, then measuring and reading the displacement at every 30 minutes, and after the load is stabilized, loading or unloading the next level;
step 7, closing a lower load box positioned in the lower reinforcement cage, loading the annular load box (2) of the middle reinforcement cage (6) onto the pile body of the upper reinforcement cage (5) through an oil pump (4) until the upward displacement distance of the pile body of the upper reinforcement cage (5) is increased steeply, then unloading, wherein the loading and the unloading are respectively classified loading and classified unloading, and the loading amount and the unloading amount of each grade are 1/15 of the maximum loading amount of the annular load box (2);
and 8, measuring and reading the displacement at 5 th, 10 th, 15 th, 30 th, 45 th and 60 th within 1 hour of loading and unloading of each stage of load, then measuring and reading the displacement at every 30 minutes, and after the stability is reached, loading or unloading the next stage.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117344807A (en) * | 2023-10-20 | 2024-01-05 | 广州开发区建设工程检测中心有限公司 | Vertical bearing capacity device for detecting foundation pile and detection method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060213279A1 (en) * | 2005-03-25 | 2006-09-28 | Yong-Kyu Choi | Apparatus and method for measuring supporting force of large diameter ferroconcrete piles |
| CN205276334U (en) * | 2015-12-31 | 2016-06-01 | 南京赛宝液压设备有限公司 | A spherical load box for self -balancing peg method |
| CN105780825A (en) * | 2016-03-28 | 2016-07-20 | 中国十七冶集团有限公司 | Pile foundation construction environment control and evaluation method based on self-balanced detection test |
| CN207079641U (en) * | 2017-08-15 | 2018-03-09 | 湖南联智智能科技有限公司 | Pile bearing capacity automatic checkout system based on self-balancing approach |
| CN108532649A (en) * | 2018-03-29 | 2018-09-14 | 河北建设勘察研究院有限公司 | A kind of compressive static load test method of bored concrete pile |
| CN208183820U (en) * | 2018-05-02 | 2018-12-04 | 广东天信电力工程检测有限公司 | A kind of improved club-footed pile self-balanced static-load testing device |
| CN110056019A (en) * | 2019-05-20 | 2019-07-26 | 天津市建桓地基基础检测有限公司 | A kind of self-balancing static load formula pile foundation test device and construction method |
| CN110258672A (en) * | 2019-07-20 | 2019-09-20 | 东莞市建安桩基础工程有限公司 | A kind of self-balancing approach pile measurement system |
| CN110284537A (en) * | 2019-08-04 | 2019-09-27 | 浙江欧感机械制造有限公司 | The load box structure of strength of pile body after raising pile foundation autobalanced detection |
| CN110280700A (en) * | 2019-06-25 | 2019-09-27 | 中建七局安装工程有限公司 | It is a kind of to facilitate overlength steel reinforcement cage segmentation docking processing system and processing method |
| CN111236327A (en) * | 2020-01-17 | 2020-06-05 | 武汉建诚工程技术有限公司 | Load box for self-balancing detection, pile foundation bearing capacity detection device and method |
-
2020
- 2020-06-18 CN CN202010562242.5A patent/CN111560998A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060213279A1 (en) * | 2005-03-25 | 2006-09-28 | Yong-Kyu Choi | Apparatus and method for measuring supporting force of large diameter ferroconcrete piles |
| CN205276334U (en) * | 2015-12-31 | 2016-06-01 | 南京赛宝液压设备有限公司 | A spherical load box for self -balancing peg method |
| CN105780825A (en) * | 2016-03-28 | 2016-07-20 | 中国十七冶集团有限公司 | Pile foundation construction environment control and evaluation method based on self-balanced detection test |
| CN207079641U (en) * | 2017-08-15 | 2018-03-09 | 湖南联智智能科技有限公司 | Pile bearing capacity automatic checkout system based on self-balancing approach |
| CN108532649A (en) * | 2018-03-29 | 2018-09-14 | 河北建设勘察研究院有限公司 | A kind of compressive static load test method of bored concrete pile |
| CN208183820U (en) * | 2018-05-02 | 2018-12-04 | 广东天信电力工程检测有限公司 | A kind of improved club-footed pile self-balanced static-load testing device |
| CN110056019A (en) * | 2019-05-20 | 2019-07-26 | 天津市建桓地基基础检测有限公司 | A kind of self-balancing static load formula pile foundation test device and construction method |
| CN110280700A (en) * | 2019-06-25 | 2019-09-27 | 中建七局安装工程有限公司 | It is a kind of to facilitate overlength steel reinforcement cage segmentation docking processing system and processing method |
| CN110258672A (en) * | 2019-07-20 | 2019-09-20 | 东莞市建安桩基础工程有限公司 | A kind of self-balancing approach pile measurement system |
| CN110284537A (en) * | 2019-08-04 | 2019-09-27 | 浙江欧感机械制造有限公司 | The load box structure of strength of pile body after raising pile foundation autobalanced detection |
| CN111236327A (en) * | 2020-01-17 | 2020-06-05 | 武汉建诚工程技术有限公司 | Load box for self-balancing detection, pile foundation bearing capacity detection device and method |
Non-Patent Citations (4)
| Title |
|---|
| 丛蔼森等: "《深基坑防渗体的设计施工与应用》", 21 March 2021 * |
| 于荣林: "双荷载箱自平衡法在地下建筑物基桩承载力试验中的", 《建筑科学》 * |
| 刘瑶等: "《基础工程施工》", 31 January 2012 * |
| 卢波: "自平衡桩基测试双荷载箱技术的工程应用", 《建筑结构》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117344807A (en) * | 2023-10-20 | 2024-01-05 | 广州开发区建设工程检测中心有限公司 | Vertical bearing capacity device for detecting foundation pile and detection method thereof |
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Application publication date: 20200821 |