CN212405281U - Vertical resistance to plucking static load detection device of single pile - Google Patents
Vertical resistance to plucking static load detection device of single pile Download PDFInfo
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- CN212405281U CN212405281U CN202020780402.9U CN202020780402U CN212405281U CN 212405281 U CN212405281 U CN 212405281U CN 202020780402 U CN202020780402 U CN 202020780402U CN 212405281 U CN212405281 U CN 212405281U
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Abstract
The utility model provides a vertical resistance to plucking static load detection device of single pile belongs to construction machinery technical field for it is not steady to solve current resistance to plucking detection device motion, is difficult to used repeatedly's technical problem. The device comprises a foundation and a test pile, wherein a conical ring pressure bearing pad is fixed on the foundation, a pressure bearing plate is fixed on the conical ring pressure bearing pad, a guide rod is arranged on the pressure bearing plate, a top plate is arranged on the guide rod, a screw rod and a counter-force disc are arranged between the pressure bearing plate and the top plate, a hydraulic motor is fixed on the top plate, an inner conical sleeve is arranged on the counter-force disc, semi-friction cylinders are arranged in the inner conical sleeve, a limiting block is welded and fixed on the pressure bearing reinforcing steel bar, a reinforcing steel bar connecting sleeve is fixedly connected between a base pile reinforcing steel bar and the pressure bearing reinforcing steel bar, and a displacement meter is arranged; the utility model discloses a trapezoidal thread utilizes the lead screw structure transmission, and the motion is steady reliable, and the guide bar can balanced torque, improves stability, connects through the steel bar connection muffjoint, convenient to use, the used repeatedly of being convenient for.
Description
Technical Field
The utility model belongs to the technical field of construction machinery, a resistance to plucking detection device is related to, especially a vertical resistance to plucking static load detection device of single pile.
Background
The single-pile vertical uplift bearing capacity detection means a process of testing the vertical uplift resistance of a single pile and carrying out analysis processing by a certain method, the method for obtaining the single-pile vertical uplift bearing capacity comprises a single-pile vertical uplift static load test, a standard empirical formula and theoretical analysis, the existing single-pile vertical uplift static load test generally works by parallel hydraulic jacks, the requirement on an oil pipeline is high, the tension on two sides is difficult to balance, measurement is prone to be inaccurate, the uplift pile can be seriously damaged, feeding is unstable, impact is large, and the test result is influenced.
Through retrieval, for example, chinese patent literature discloses an anchoring connection method uplift device for a single-pile vertical uplift static load test [ application number: CN 201910051832.9; publication No.: CN109667293B ]. This kind of vertical resistance to plucking static test's of single pile anchor connection method resistance to plucking device includes buttress, girder and jack, the output of jack even has fixing device, and fixing device fixedly connected with a plurality of pull rods, pull rod pass through the connecting piece that excels in and be connected with the test pile, still are provided with the displacement and detect the structure, and the device though can improve work efficiency, moves unstably, is difficult to used repeatedly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having the above-mentioned problem to current technique, provided a vertical resistance to plucking static load detection device of single pile, the technical problem that the device will solve is: how to realize that the vertical resistance to plucking static load detection device of single pile moves steadily, can improve experimental precision, the used repeatedly of being convenient for simultaneously.
The purpose of the utility model can be realized by the following technical proposal:
a vertical anti-pulling static load detection device for a single pile comprises a foundation and a test pile, wherein a conical ring pressure bearing pad is fixed on the foundation, a plurality of foundation pile reinforcing steel bars with uniformly distributed circumferences are arranged in the test pile, a pressure bearing plate is fixed on the conical ring pressure bearing pad, a plurality of guide rods with uniformly distributed circumferences are arranged on the pressure bearing plate, a top plate is arranged at the end part of each guide rod, a screw rod is rotatably arranged between the pressure bearing plate and the top plate, a hydraulic motor is fixed on the top plate, an output shaft of the hydraulic motor is fixedly connected with the end part of the screw rod, the hydraulic motor is connected with an external hydraulic station through an oil pipeline, a counter-force disc is arranged between the pressure bearing plate and the top plate, a plurality of inner conical sleeves with uniformly distributed circumferences are arranged on the counter-force disc, two half friction cylinders which are matched with each other are arranged in the inner conical sleeves, a pressure bearing reinforcing steel bar is tightly pressed between the, the inner wall of the conical ring pressure bearing pad is provided with a plurality of displacement meters which are uniformly distributed.
The utility model discloses a theory of operation is: the bearing pad of awl ring plays the stable supporting role, the bearing plate plays the support positioning action, the guide bar can lead and support the counter-force dish, and guide bar circumference equipartition, can balance the moment on the counter-force dish, improve and pull out the stability of rising motion, hydraulic motor's output shaft drives the screw rod and rotates, it upwards feeds to make the counter-force dish, thereby pull out the lift to foundation pile reinforcing bar and test stake through the pressure-bearing reinforcing bar, carry out the resistance to plucking and detect, open through opening of hydraulic pressure station control hydraulic motor, can increase test load or carry out the dead load and detect, pressure-bearing reinforcing bar can be fixed to interior toper sleeve and half friction cylinder, the stopper can prevent that the pressure-bearing reinforcing bar from droing, the displacement meter can detect the position.
The cross-sectional shape of awl ring pressure pad is right trapezoid, and the inner wall of awl ring pressure pad is the face of cylinder, and the outer wall of awl ring pressure pad is the conical surface, and the periphery of awl ring pressure pad is equipped with the rings of a plurality of circumference equipartitions, and awl ring pressure pad is made for concrete material.
By adopting the structure, the cross section of the conical ring pressure bearing pad is in a right trapezoid shape, so that the device can be stably supported, the hanging ring uniformly distributed on the circumference can stably hoist the device, the conical ring pressure bearing pad is made of concrete materials, the manufacturing cost is low, and the cost can be saved.
The center of bearing plate up end is equipped with the lower support frustum, and the periphery of bearing plate up end is equipped with the lower direction frustum of a plurality of circumference equipartitions, sets up the groove of dodging of a plurality of circumference equipartitions that run through on the bearing plate, and the bottom of bearing plate is the thickening frustum.
Structure more than adopting, the appearance of lower support frustum and lower direction frustum all is the toper, can improve support intensity and stability, sets up and dodges the groove and can prevent to interfere, has the positioning action simultaneously, and the thickening frustum can improve the support intensity of pressure-bearing plate.
The center of the lower end face of the top plate is provided with an upper supporting circular truncated cone, the periphery of the lower end face of the top plate is provided with a plurality of upper guiding circular truncated cones which are uniformly distributed on the circumference, the guide rod is fixed between the lower guiding circular truncated cone and the upper guiding circular truncated cone and penetrates through the counter-force disc, one end of the screw rod is rotatably arranged in the lower supporting circular truncated cone, and the other end of the screw rod is rotatably arranged in the upper supporting circular truncated cone.
By adopting the structure, the guide rods play a role in guiding and supporting, and are uniformly distributed on the circumference of the guide rods, so that the moment on the counter-force disc can be balanced, the stability of the pulling motion is improved, and the test accuracy is improved.
The middle part of counter-force dish is equipped with two frustums, and trapezoidal thread has all been seted up to the inside and screw rod periphery of two frustums, screw-thread fit between two frustums and the screw rod, sets up the reinforcing bar through hole of a plurality of circumference equipartitions on the counter-force dish, and it is corresponding to dodge groove and reinforcing bar through hole, and it all is the bar hole to dodge groove and reinforcing bar through hole appearance, and the pressure-bearing reinforcing bar passes and dodges groove and reinforcing bar through hole.
Structure more than adopting can guarantee transmission strength through seting up trapezoidal thread, and centering nature is good, can improve test precision, screw-thread fit between bipyramid platform and the screw rod, and the transmission is steady reliable, and vibration impact and noise are less, sets up the reinforcing bar through hole and can fix a position the pressure-bearing reinforcing bar, and the bar hole can adapt to not unidimensional test stake.
The telescopic inner wall of interior toper and the outer wall of a half friction section of thick bamboo all are the back taper, and the telescopic inner wall of interior toper and the outer wall of a half friction section of thick bamboo are complementary, and the inner wall of a half friction section of thick bamboo is the semicylindrical friction surface, and the bottom surface of stopper is contradicted including the telescopic up end of toper.
Structure more than adopting, through the back taper lateral wall, when enabling the counter-force dish and upwards promoting, two half friction section of thick bamboos of interior tapered sleeve oppression closely laminate to press from both sides tightly and fix the pressure-bearing reinforcing bar, tapered sleeve's up end including the bottom surface of stopper is contradicted can oppress two half friction section of thick bamboos and inwards paste tightly, prevent simultaneously that the pressure-bearing reinforcing bar from droing.
Compared with the prior art, this vertical resistance to plucking static load detection device of single pile has following advantage:
1. the trapezoidal threads are used for transmission through the screw rod structure, the movement is stable and reliable, the test precision can be improved, the vibration impact noise is small, the guide rods can balance the torque on the counter-force disc, the stability of the pulling movement is improved, the support strength can be improved by the conical ring bearing pads and the bearing plates, the strip-shaped holes can adapt to test piles of different sizes, and the test piles are connected through the steel bar connecting sleeves, so that the use is convenient and the repeated use is convenient;
2. the inverted cone-shaped side wall can press the two half friction cylinders to be tightly attached when the counter-force disc is lifted upwards, so that the pressure-bearing reinforcing steel bar is clamped and fixed, and the limiting block can press the two half friction cylinders to be tightly attached inwards and prevent the pressure-bearing reinforcing steel bar from falling off;
3. the cone ring pressure-bearing pad is made of concrete materials, is low in manufacturing cost, can save cost, is provided with the avoidance groove to prevent interference, and has a positioning effect.
Drawings
FIG. 1 is a schematic view of an axial measurement structure of the present invention;
fig. 2 is a schematic front sectional view of the present invention;
FIG. 3 is a schematic view of the axial local cross-section structure of the present invention;
FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;
in the figure: 1-foundation, 2-cone ring pressure bearing pads, 3-test piles, 4-foundation pile steel bars, 5-pressure bearing plates, 5 a-lower supporting frustum, 5 b-lower guiding frustum, 5 c-avoidance groove, 6-guide rod, 7-top plate, 7 a-upper supporting circular truncated cone, 7 b-upper guiding circular truncated cone, 8-screw, 9-counterforce disc, 9 a-double frustum, 9 b-steel bar through hole, 10-hydraulic motor, 11-inner conical sleeve, 12-half friction cylinder, 13-pressure bearing steel bars, 14-steel bar connecting sleeve, 15-displacement meter and 16-limiting block.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-4, the present embodiment provides a single-pile vertical uplift static load detection device, which includes a foundation 1 and a test pile 3, a conical ring pressure-bearing pad 2 is fixed on the foundation 1, a plurality of circumferentially and uniformly distributed foundation pile steel bars 4 are arranged in the test pile 3, a pressure-bearing plate 5 is fixed on the conical ring pressure-bearing pad 2, in the present embodiment, the fixing manner is bolt connection, a plurality of circumferentially and uniformly distributed guide rods 6 are arranged on the pressure-bearing plate 5, a top plate 7 is arranged at an end portion of the guide rods 6, a screw 8 is rotatably arranged between the pressure-bearing plate 5 and the top plate 7, a hydraulic motor 10 is fixed on the top plate 7, in the present embodiment, the fixing manner is bolt connection, an output shaft of the hydraulic motor 10 is fixedly connected with an end portion of the screw 8, in the present embodiment, the fixing manner is key connection, the hydraulic motor 10 is connected with an external, a reaction disc 9 is arranged between the bearing plate 5 and the top plate 7, a plurality of inner conical sleeves 11 which are uniformly distributed on the circumference are arranged on the reaction disc 9, two half friction cylinders 12 which are matched with each other are arranged in each inner conical sleeve 11, a bearing reinforcing steel bar 13 is compressed between the two half friction cylinders 12, a limiting block 16 is welded and fixed on each bearing reinforcing steel bar 13, a reinforcing steel bar connecting sleeve 14 is fixedly connected between each foundation pile reinforcing steel bar 4 and each bearing reinforcing steel bar 13, and a plurality of displacement meters 15 which are uniformly distributed are arranged on the inner wall of the conical ring bearing pad 2; taper ring bearing pad 2 plays the stable supporting role, bearing plate 5 plays the supporting location effect, guide bar 6 can lead and support counter-force dish 9, and 6 circumference equipartitions of guide bar, can balance the moment on the counter-force dish 9, improve and pull out the stability of rising the motion, hydraulic motor 10's output shaft drives screw rod 8 and rotates, it upwards feeds to enable counter-force dish 9, thereby pull out the lift to foundation pile reinforcing bar 4 and test pile 3 through pressure-bearing reinforcing bar 13, carry out the resistance to plucking and detect, open through hydraulic motor 10 of hydraulic pressure station control and stop, can increase test load or carry out the static load and detect, pressure-bearing reinforcing bar 13 can be fixed to interior tapered sleeve 11 and half friction cylinder 12, stopper 16 can prevent that pressure-bearing reinforcing bar 13 from droing, displacement meter 15 can detect the position removal of test pile 3.
The section of the conical ring pressure bearing pad 2 is in a right trapezoid shape, the inner wall of the conical ring pressure bearing pad 2 is a cylindrical surface, the outer wall of the conical ring pressure bearing pad 2 is a conical surface, a plurality of lifting rings which are uniformly distributed in the circumferential direction are arranged on the periphery of the conical ring pressure bearing pad 2, and the conical ring pressure bearing pad 2 is made of concrete materials; the cross-sectional shape of awl ring pressure pad 2 is right trapezoid, can the stable support, and rings through the circumference equipartition can steady handling this device, and awl ring pressure pad 2 adopts concrete material to make, and low in cost can save the cost.
A lower supporting frustum 5a is arranged at the center of the upper end face of the pressure bearing plate 5, a plurality of lower guiding frustums 5b which are uniformly distributed circumferentially are arranged on the periphery of the upper end face of the pressure bearing plate 5, a plurality of through avoidance grooves 5c which are uniformly distributed circumferentially are arranged on the pressure bearing plate 5, and a thickening frustum is arranged at the bottom of the pressure bearing plate 5; the appearance of lower support frustum 5a and lower direction frustum 5b all is the toper, can improve support intensity and stability, sets up and dodges groove 5c and can prevent to interfere, has the positioning action simultaneously, and the thickening frustum can improve the support intensity of bearing plate 5.
An upper supporting circular truncated cone 7a is arranged at the center of the lower end face of the top plate 7, a plurality of upper guiding circular truncated cones 7b which are uniformly distributed circumferentially are arranged on the periphery of the lower end face of the top plate 7, and a guide rod 6 is fixed between the lower guiding circular truncated cone 5b and the upper guiding circular truncated cone 7 b; the guide rod 6 plays a role in guiding and supporting, the guide rod 6 is uniformly distributed on the circumference, the moment on the counter-force disc 9 can be balanced, the stability of the pulling motion is improved, and therefore the test accuracy is improved.
The middle part of the counter-force disc 9 is provided with a double-cone 9a, trapezoidal threads are arranged inside the double-cone 9a and on the periphery of the screw 8, the double-cone 9a is in threaded fit with the screw 8, the counter-force disc 9 is provided with a plurality of circumferentially and uniformly distributed steel bar through holes 9b, the avoiding groove 5c corresponds to the steel bar through hole 9b, the avoiding groove 5c and the steel bar through hole 9b are strip-shaped holes, and the pressure-bearing steel bar 13 passes through the avoiding groove 5c and the steel bar through hole 9 b; can guarantee transmission strength through seting up trapezoidal thread, and centering nature is good, can improve test accuracy, screw-thread fit between bipyramid platform 9a and the screw rod 8, the transmission is steady reliable, and vibration impact and noise are less, sets up reinforcing bar through hole 9b and can fix a position pressure-bearing reinforcing bar 13, and the bar hole can adapt to not unidimensional test pile 3.
The inner wall of the inner conical sleeve 11 and the outer wall of the half friction cylinder 12 are both in an inverted cone shape, the inner wall of the inner conical sleeve 11 is complementary with the outer wall of the half friction cylinder 12, the inner wall of the half friction cylinder 12 is a semi-cylindrical friction surface, and the bottom surface of the limiting block 16 is abutted to the upper end surface of the inner conical sleeve 11; through the back taper lateral wall, when enabling counter-force dish 9 to lift upwards, two half friction section of thick bamboo 12 of interior conical sleeve 11 oppression are closely laminated to press from both sides tightly and fix pressure-bearing reinforcing bar 13, the up end of conical sleeve 11 including the bottom surface conflict of stopper 16 can oppress two half friction section of thick bamboo 12 and inwards paste tightly, prevent simultaneously that pressure-bearing reinforcing bar 13 from droing.
The utility model discloses a theory of operation:
when using this device, earlier with this device hoist transport to experimental stake 3 tops, the operation workman passes through steel bar connection sleeve 14 with foundation pile reinforcing bar 4 and pressure-bearing reinforcing bar 13 and is connected, connects the completion back, places this device on ground 1, passes through oil circuit pipe with hydraulic motor 10 and outside hydraulic pressure station and is connected, opens through opening of hydraulic pressure station control hydraulic motor 10 and stops, can increase test load or carry out the dead load and detect.
The hydraulic motor 10 is started, the output shaft of the hydraulic motor 10 drives the screw rod 8 to rotate, the double cone table 9a is in threaded fit with the screw rod 8, the counter-force disc 9 can be fed upwards, the trapezoidal threads can guarantee the transmission strength, the transmission is stable and reliable, the centering performance is good, the test precision can be improved, the vibration impact and the noise are small, the guide rods 6 play a role in guiding and supporting, the guide rods 6 are uniformly distributed on the circumference, the moment on the counter-force disc 9 can be balanced, the stability of the pulling motion is improved, and therefore the test accuracy is improved; reaction dish 9 pulls out through pressure-bearing reinforcing bar 13 to foundation pile reinforcing bar 4 and experimental stake 3 and rises, it detects to resist pulling, the inner wall of interior tapered sleeve 11 and the outer wall of a half friction section of thick bamboo 12 all are the back taper, can be when reaction dish 9 rises upwards, interior tapered sleeve 11 oppresses two half friction section of thick bamboos 12 and closely laminate, thereby press from both sides tightly and fixed pressure-bearing reinforcing bar 13, the up end of tapered sleeve 11 including the bottom surface conflict of stopper 16, can oppress two half friction section of thick bamboos 12 and inwards paste tightly, prevent simultaneously that pressure-bearing reinforcing bar 13 from droing, displacement meter 15 can detect the position removal of experimental stake 3.
The cross-sectional shape of awl ring pressure pad 2 is right trapezoid, can the stable support, awl ring pressure pad 2 adopts concrete material to make, low in cost, can save the cost, under bracing frustum 5a and lower direction frustum 5 b's appearance all are the toper, can improve support strength and stability, set up and dodge groove 5c and can prevent to interfere, the positioning action has simultaneously, thickening frustum can improve the support strength of bearing plate 5, can fix a position pressure-bearing reinforcing bar 13 through seting up reinforcing bar through hole 9b, and the bar hole can adapt to not unidimensional test stake 3.
After the test is finished, the hydraulic motor 10 is controlled to rotate reversely, the counter-force plate 9 is reset, the device is lifted through the lifting ring, the steel bar connecting sleeve 14 is removed, and then the device is lifted.
In conclusion, the trapezoidal threads are used for transmission through the screw rod structure, the movement is stable and reliable, the test precision can be improved, the vibration impact noise is small, the guide rod 6 can balance the torque on the counter-force disc 9, the stability of the pulling movement is improved, the conical ring pressure-bearing pad 2 and the pressure-bearing plate 5 can improve the support strength, the strip-shaped holes can adapt to test piles 3 of different sizes, and the test piles are connected through the steel bar connecting sleeve 14, so that the use is convenient, and the repeated use is convenient; the inverted cone-shaped side wall can press the two half friction cylinders 12 to be tightly attached when the counterforce disc 9 is lifted upwards, so that the pressure-bearing reinforcing steel bars 13 are clamped and fixed, and the limiting blocks 16 can press the two half friction cylinders 12 to be tightly attached inwards and prevent the pressure-bearing reinforcing steel bars 13 from falling off; the conical ring pressure bearing pad 2 is made of concrete materials, is low in manufacturing cost and capable of saving cost, and the avoidance groove 5c is formed to prevent interference and has a positioning effect.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (6)
1. A single-pile vertical pulling-resistant static load detection device comprises a foundation (1) and a test pile (3), and is characterized in that a conical ring pressure bearing pad (2) is fixed on the foundation (1), foundation pile reinforcing steel bars (4) uniformly distributed on a plurality of circumferences are arranged in the test pile (3), a bearing plate (5) is fixed on the conical ring pressure bearing pad (2), guide rods (6) uniformly distributed on a plurality of circumferences are arranged on the bearing plate (5), a top plate (7) is arranged at the end part of each guide rod (6), a screw rod (8) is rotatably arranged between each bearing plate (5) and the top plate (7), a hydraulic motor (10) is fixed on each top plate (7), an output shaft of the hydraulic motor (10) is fixedly connected with the end part of the screw rod (8), the hydraulic motor (10) is connected with an external hydraulic station through an oil pipeline, a counter-force disc (9) is arranged between each bearing plate (5) and the top plate (7), and an inner conical sleeve (11) uniformly distributed on each counter-force, all be provided with two half friction cylinder (12) of mutually supporting in interior tapered sleeve (11), compress tightly between two half friction cylinder (12) and have pressure-bearing reinforcing bar (13), welded fastening has stopper (16) on pressure-bearing reinforcing bar (13), fixedly connected with steel bar connection sleeve (14) between foundation pile reinforcing bar (4) and pressure-bearing reinforcing bar (13), and the inner wall of awl ring pressure-bearing pad (2) is equipped with displacement meter (15) of a plurality of equipartitions.
2. The single-pile vertical uplift static load detection device as claimed in claim 1, wherein the cross-sectional shape of the conical ring pressure bearing pad (2) is a right trapezoid, the inner wall of the conical ring pressure bearing pad (2) is a cylindrical surface, the outer wall of the conical ring pressure bearing pad (2) is a conical surface, a plurality of lifting rings are uniformly distributed on the periphery of the conical ring pressure bearing pad (2), and the conical ring pressure bearing pad (2) is made of concrete materials.
3. The single-pile vertical anti-pulling static load detection device according to claim 1, characterized in that a lower support frustum (5a) is arranged at the center of the upper end face of the bearing plate (5), a lower guide frustum (5b) with a plurality of circumferential uniform distribution is arranged at the periphery of the upper end face of the bearing plate (5), a plurality of through avoidance grooves (5c) with circumferential uniform distribution are formed in the bearing plate (5), and the bottom of the bearing plate (5) is a thickening frustum.
4. The single-pile vertical uplift static load detection device according to claim 3, wherein an upper supporting circular truncated cone (7a) is arranged at the center of the lower end face of the top plate (7), a plurality of upper guiding circular truncated cones (7b) which are uniformly distributed in the circumferential direction are arranged on the periphery of the lower end face of the top plate (7), the guide rod (6) is fixed between the lower guiding circular truncated cone (5b) and the upper guiding circular truncated cone (7b), the guide rod (6) penetrates through the counter-force disc (9), one end of the screw rod (8) is rotatably arranged in the lower supporting circular truncated cone (5a), and the other end of the screw rod (8) is rotatably arranged in the upper supporting circular truncated cone (7 a).
5. The single-pile vertical anti-pulling static load detection device according to claim 4, wherein a double frustum (9a) is arranged in the middle of the counter-force disc (9), trapezoidal threads are formed in the inner portion of the double frustum (9a) and the periphery of the screw (8), the double frustum (9a) and the screw (8) are in threaded fit, a plurality of circumferentially and uniformly distributed steel bar through holes (9b) are formed in the counter-force disc (9), the avoiding grooves (5c) are corresponding to the steel bar through holes (9b), the avoiding grooves (5c) and the steel bar through holes (9b) are all strip-shaped holes, and the bearing steel bars (13) pass the avoiding grooves (5c) and the steel bar through holes (9 b).
6. The single-pile vertical pulling-resistant static load detection device as claimed in claim 1, wherein the inner wall of the inner conical sleeve (11) and the outer wall of the half friction cylinder (12) are both in an inverted cone shape, the inner wall of the inner conical sleeve (11) and the outer wall of the half friction cylinder (12) are complementary, the inner wall of the half friction cylinder (12) is a half-cylindrical friction surface, and the bottom surface of the limiting block (16) abuts against the upper end surface of the inner conical sleeve (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020780402.9U CN212405281U (en) | 2020-05-12 | 2020-05-12 | Vertical resistance to plucking static load detection device of single pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020780402.9U CN212405281U (en) | 2020-05-12 | 2020-05-12 | Vertical resistance to plucking static load detection device of single pile |
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| CN212405281U true CN212405281U (en) | 2021-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094964A (en) * | 2022-08-11 | 2022-09-23 | 西南交通大学 | Pile foundation uplift test device and method adopting assembled jack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094964A (en) * | 2022-08-11 | 2022-09-23 | 西南交通大学 | Pile foundation uplift test device and method adopting assembled jack |
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