CN111535374A - Pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system and method - Google Patents
Pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system and method Download PDFInfo
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Abstract
The invention relates to a system and a method for detecting torsion resistance, tensile torsion resistance and compressive torsion resistance of a pile foundation, which comprise a base, the pile foundation, a pile top steel plate, a reaction frame, a reference beam and a torsion angle measuring device, wherein the base is provided with a base plate and a pile top steel plate; the base is composed of two semi-annular steel plates and surrounds the pile foundation; the steel bars at the pile foundation top are welded with the pile top steel plate, and the steel blocks are welded on the base and used for supporting the horizontal jack and providing torque; a tensile-resistant torsion detection vertical jack is arranged on the base; placing a compression-resistant torsion detection vertical jack on the pile top steel plate; set up the torsion angle measuring device in one side around pile foundation and base, torsion angle measuring device including about two spinal branch vaulting poles and the scale of setting up between. The method is simple and convenient, easy to operate, good in accuracy and suitable for popularization and application.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system and method.
Background
With the rapid development of economy, a large number of super high-rise buildings, transmission line towers, offshore wind power generation towers, offshore drilling platforms and the like are used for pile foundations. Compared with the common engineering, the upper structure of the engineering is often subjected to horizontal loads such as large wind load, wave load, ship and vehicle impact load and the like. These horizontal loads are often transmitted to the pile foundation in the form of eccentric loads, resulting in the pile foundation being subjected to the action of torque on the basis of conventional vertical, horizontal and bending forces. In common engineering, torque load is usually small, and the bearing capacity requirement can be met according to the design of a horizontal loaded pile, however, for the engineering of the kind, the torque load borne by the pile can be increased to a large value at a certain moment, so that the pile foundation designed by neglecting the torque load is unsafe. For example, two high-rise buildings in the United states have great loss due to the fact that the influence of torque action on the bearing capacity of a pile foundation is not considered in the design stage and the pile foundation generates permanent torsional deformation when being attacked by hurricanes; in China, foundation piles at the end part of a high-pile wharf are seriously damaged due to an earthquake, mainly because the wharf generates translation and non-negligible torsion during the earthquake, so that the foundation piles distributed at the end part of the wharf are more seriously damaged than the foundation piles positioned at other positions of the wharf. In order to better ensure the safe use of the pile foundation in the engineering, the detection of the ultimate torsional bearing capacity is very important.
Disclosure of Invention
The invention aims to provide a pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system and method.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system comprises a base, a pile foundation, a pile top steel plate, a reaction frame, a reference beam and a torsion angle measuring device; the method comprises the following steps that two steel bar channels are arranged on the part above the ground of a pile foundation, the height positions of the two steel bar channels are staggered, and the two steel bar channels are crossed in the direction to form an X shape; the base is arranged on the ground at the root of the pile foundation and is fixed with the ground. The base is composed of two semi-annular steel plates, two ends of each semi-annular steel plate are vertical connecting ends, the two semi-annular steel plates are placed in opposite directions and are spliced through the vertical connecting ends and surround the pile foundation, and the vertical connecting ends of the two semi-annular steel plates are anchored by bolts; welding a steel bar at the top of the pile foundation with a pile top steel plate, and placing a laser pen on the pile top steel plate; welding a steel block on the base, wherein the steel block is used for supporting the horizontal jack; the base is also provided with a tension-torsion-resistant detection vertical jack placing point, and the tension-torsion-resistant detection vertical jack is erected between the base and the pile top steel plate; the pile top steel plate is provided with a compression-resistant torsion detection vertical jack placing point, the base is provided with a reaction frame for downwards applying pressure to the pile top steel plate, and the compression-resistant torsion detection vertical jack is arranged between the pile top steel plate and the reaction frame; the utility model discloses a set up torsion angle measuring device in pile foundation and the outer one side of base, torsion angle measuring device be the scale that the level was set up, scale and pile top steel sheet on the laser pen be same height.
The reinforcing bar and the welding of pile bolck steel sheet of pile bolck department, mark at pile bolck steel sheet center department O point, outwards extend and mark the OC line, place the laser pen in OC line department, outwards extend and mark two lines of OA and OB from center department O point respectively in OC line both sides, and be 30 with OC fastener angle.
And the two steel bar channels reserved on the pile foundation are positioned from the lower part to the middle part of the pile foundation. The middle part of the steel bar is a circular pipe, the two ends of the steel bar are square heads, and the steel bar gradually changes from a circle to a square from a position at a distance from the center to the two ends.
A reference beam is arranged above the middle point of the outer pile base of the base, a displacement meter is arranged on the reference beam, and the displacement meter is arranged between the reference beam and the pile top steel plate and used for measuring the vertical displacement change of the pile top.
The splicing distance of the connecting ends of the two semi-annular steel plates is adjusted through bolts.
The installation of pile top steel plate does: chiseling the concrete at the pile foundation top to expose the reinforcing steel bars, welding the pile top steel plate with the exposed reinforcing steel bars, backfilling the high-strength concrete below the pile top steel plate installed at the pile foundation top after welding, and directly welding the top plate with a reinforcement cage during manufacturing of the test pile, and then pouring the concrete.
The device capable of moving up and down is a telescopic rod.
The leveling bubble is arranged in the middle of the graduated scale and can be used for leveling the graduated scale; the distance of the scale of the graduated scale projected on the graduated scale according to the rotating angle of the laser pen is farther away from the middle, and the scale is more sparse.
The tensile is turned round and is detected vertical jack mounting point, the resistance to compression is turned round and is detected vertical jack mounting point and be the slot-shaped, the tensile is turned round and is detected vertical jack, resistance to compression and is turned round and detect vertical jack lower part and all have the ball for when guaranteeing to pull to turn round or press to turn round the test, the jack that vertical direction provided pulling force or pressure can follow the foundation pile and twist round and take place the fine setting of horizontal direction, but the pulling force or the pressure that vertical direction provided are unchangeable.
The two welding steel blocks for supporting the horizontal jacks are respectively arranged on the two semi-annular steel plates and symmetrically distributed relative to the center of the pile foundation, and the four horizontal jacks are fixed together; the positions of the tension and torsion resistant detection vertical jacks are respectively two on the two semi-annular steel plates, and the four tension and torsion resistant detection vertical jacks are symmetrically distributed relative to the center of the pile foundation and are fixed together; the four compression-resistant torsion detection vertical jacks are arranged on the circular steel plate of the pile top and are fixed relative to the central symmetry distribution of the pile foundation.
The two reaction frames are symmetrically arranged on the base; the torsion angle measuring device comprises a left supporting rod and a right supporting rod, the height of the left supporting rod and the height of the right supporting rod can be adjusted up and down, and a graduated scale is arranged between the two supporting rods.
The torsion angle measuring device comprises a left supporting rod and a right supporting rod, the height of the left supporting rod and the height of the right supporting rod can be adjusted up and down, and a graduated scale is arranged between the two supporting rods.
The reference beam is fixed on the ground, the distance from the fixed point to the center of the test pile is more than or equal to 4d (d is the pile diameter) and not less than 2.5m, and the vertical displacement meter is arranged on the reference beam and used for measuring the vertical displacement when the pile top steel plate is pulled or pressed.
Compared with the prior art, the invention has the beneficial effects that:
the pile foundation detection system can respectively detect the torsion resistance, tension torsion resistance and torsion resistance multidirectional performance of the pile foundation, and solves the problem that a special detection device or equipment special for detecting the torsion bearing capacity of the pile foundation is absent in the prior art. The invention has simple and convenient structure, easy operation and good accuracy, and is suitable for popularization and application.
Drawings
FIG. 1: the structural schematic diagram of the pile foundation.
FIG. 2: the installation structure of the pile foundation and the pile top steel plate is schematically shown.
FIG. 3: schematic diagram of pile top steel plate.
FIG. 4: a base schematic.
FIG. 5: the base structure is schematically shown.
FIG. 6: base, pile foundation, pile bolck steel sheet structure sketch map.
FIG. 7: the structure schematic diagram of the pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system.
FIG. 8: the structure of the pile foundation of the reaction frame is increased.
FIG. 9: the structure of the offshore pile foundation is shown schematically.
In the figure: 1-pile foundation, 2-base, 3-pile top steel plate, 4-steel bar channel, 5-steel bar, 6-erection connecting end, 7-bolt, 8-laser pen, 9-steel block, 10-tension-torsion-resistant detection vertical jack placement point, 11-horizontal jack, 12-tension-torsion-resistant detection vertical jack, 13-displacement meter, 14-reaction frame, 15-graduated scale, 16-level bubble, 17-tension-torsion-resistant detection vertical jack, 18-datum beam, 19-tension-torsion-resistant detection vertical jack placement point
Detailed Description
The present invention will be further described with reference to the following specific examples.
A pile foundation 1 torsion resistance, tension torsion resistance and compression torsion resistance detection system comprises a base 2, a pile foundation 1, a pile top steel plate 3 and a torsion angle measuring device; the method comprises the following steps that two steel bar channels 4 are arranged on the part above the ground of a pile foundation 1, the height positions of the two steel bar channels 4 are staggered, the two steel bar channels are crossed in the direction to form an X shape, the steel bar channels 4 are used for inserting steel bars 5, and the steel bars 5 are provided with scale marks along the length direction of the steel bars; the base 2 is arranged on the ground at the root of the pile foundation 1, the base 2 is composed of two semi-annular steel plates, two ends of each semi-annular steel plate are provided with erection connecting ends 6, the two semi-annular steel plates are oppositely arranged and spliced through the erection connecting ends 6 and surround the periphery of the pile foundation 1 (are not in contact), and the erection connecting ends 6 of the two semi-annular steel plates are anchored by bolts 7; welding a reinforcing steel bar at the top of the pile foundation 1 with a pile top steel plate 3, marking an O point at the center of the pile top steel plate 3, extending outwards to mark an OC line, placing a laser pen 8 at the OC line, extending outwards from the O point at the center to mark two OA lines and OB lines at two sides of the OC line respectively, and forming an angle of 30 degrees with the OC line; welding a steel block 9 on the base 2, wherein the steel block 9 is used for supporting a horizontal jack 11; a placing point 10 of a tension-torsion-resistant detection vertical jack 12 is also arranged on the base 2, and the tension-torsion-resistant detection vertical jack 12 is erected between the base 2 and the pile top steel plate 3; a reaction frame 14 for pressing the pile top steel plate 3 downwards is also arranged on the base 2; a placing point 19 of a compression-resistant torsion-detecting vertical jack 17 is arranged on the pile top steel plate 3, and the compression-resistant torsion-detecting vertical jack 17 is erected between the pile top steel plate 3 and the reaction frame 14; set up torsion angle measuring device in pile foundation 1 and the outer one side of base 2, torsion angle measuring device be scale 15 that the level was set up, scale 15 and the laser pen 8 on the pile top steel sheet 3 be same height. A horizontal reference beam 18 is placed on the upper part of the foundation pile, on which reference beam the displacement meter 13 is arranged.
The rod iron 5 adopts the rod iron of high strength, and the rod iron middle part is circular, and the circular shape pore makes the shaping in pile foundation 1 more easily, and the circular length in middle part is controlled about 2m is long (most stake diameter all within 1 ~ 3 m), and both ends gradual change is square, and the square jack that makes in both ends can contact with rod iron 5 better and do not skid. When the steel bar 5 is inserted, the square side surfaces at the two ends are ensured to be vertical to the horizontal ground. Scales are marked on the steel bar 5 along the length direction of the steel bar 5, when two ends of the steel bar 5 are in contact with the two horizontal jacks 11, the linear distance D between the two horizontal jacks 11 can be calculated through the scale difference of the contact positions, and the torque can be calculated according to the linear distance D and the reading of the horizontal jacks 11.
Tensile is turned round and is detected vertical jack mounting point 10, the resistance to compression is turned round and is detected vertical jack mounting point 19 and be the slot-shaped, the tensile is turned round and is detected vertical jack 12, the resistance to compression is turned round and is detected vertical jack 17 lower part and all has the ball for when guaranteeing to turn round or turn round the test, the jack that vertical direction provided pulling force or pressure can follow the basis stake and twist round and take place the fine setting of horizontal direction, but the pulling force or the pressure that vertical direction provided are unchangeable.
Two annular steel sheet sizes are big on the large side, and the size of its inner circle is adjusted to accessible long bolt 7, and annular steel sheet does not press from both sides tight pile foundation 1, remains partial distance with pile foundation 1, and under the moment of torsion effect, pile foundation 1 can rotate, and the steel sheet is fixed on ground.
Two steel bar channels 4 reserved on the pile foundation 1 are positioned from the lower part to the middle part of the pile foundation 1; the middle part of the steel bar 5 is a round pipe, the two ends of the steel bar are square heads, and the steel bar 5 gradually changes from round to square from the middle part to the two ends.
The steel bar 5 is provided with scale marks along the length direction of the steel bar.
The splicing distance of the connecting ends of the two semi-annular steel plates is adjusted through a bolt 7.
The installation of the pile top steel plate 3 is as follows: chiseling the concrete at the top of the pile foundation 1 to expose the steel bars, welding the pile top steel plate 3 with the exposed steel bars, and backfilling the high-strength concrete below the pile top steel plate 3 installed at the top of the pile foundation 1 after welding.
The device capable of moving up and down is a telescopic rod.
A leveling bubble 16 is arranged in the middle of the graduated scale 15 and can be used for leveling the graduated scale 15; the distance of the scale 15, which is projected onto the scale 15 according to the rotating angle of the laser pen 8, is far from the middle, and the scale is sparse. The scale on the scale 15 is drawn according to different torsion angles when the vertical distance from the point O to the scale 15 is L, so that the vertical distance from the point O to the scale 15 is also controlled to be L during specific measurement.
The two welding steel blocks 9 for supporting the horizontal jacks 11 are respectively arranged on the two semi-annular steel plates and are symmetrically distributed relative to the center of the pile foundation 1, and the four horizontal jacks 11 are fixed together. The supporting horizontal jacks 11 comprise a first supporting horizontal jack, a second supporting horizontal jack, a third supporting horizontal jack and a fourth supporting horizontal jack; the first supporting horizontal jack and the third supporting horizontal jack are symmetrical along the center of the pile foundation, and readings of intersection of the first supporting horizontal jack and the third supporting horizontal jack and the steel bar are respectively D through the steel bar 5 with scales1And D2(D1＞D2) (ii) a The second supporting horizontal jack and the fourth supporting horizontal jack are symmetrical along the center of the pile foundation, and readings of intersection of the second supporting horizontal jack and the fourth supporting horizontal jack and the steel bar are respectively D through the steel bar 5 with scales3And D4(D3＞D4)。
The positions for placing the tension-torsion-resisting detection vertical jacks 12 are also two on the two semi-annular steel plates respectively, and four tension-torsion-resisting detection vertical jacks 12 are fixed in total relative to the central symmetrical distribution of the pile foundation 1.
The placing points 19 of the vertical compression-torsion-resistant detection jacks 17 are symmetrically distributed on the pile top steel plate 3 relative to the center of the pile foundation 1, and the four vertical compression-torsion-resistant detection jacks 17 are fixed.
Two reaction frames 14 on base 2, the symmetry is installed on base 2 to guarantee that four resistance to compression are turned round and detect vertical jack 17 and can vertically push up on reaction frame 14, in order to provide pile foundation 1 decurrent pressure, thereby obtain the measuring effect that pile foundation 1 pressed and turned round.
The method for detecting torsion resistance, tensile torsion resistance and compressive torsion resistance of the pile foundation 1 comprises the following steps:
torsion resistance detection:
1) chiseling concrete at the top of a pile foundation 1, welding exposed reinforcing steel bars with a pile top steel plate 3, and backfilling the concrete until the concrete reaches the strength;
2) adjusting the distance between the two semi-annular steel plates of the base 2 according to the diameter of the pile foundation 1, tying the two semi-annular steel plates by using bolts 7 and fixing the two semi-annular steel plates on the ground;
3) two steel bars 5 respectively penetrate through two holes reserved in the pile foundation 1, two ends of each steel bar 5 are respectively fixed with a horizontal jack 11, and the distance between the horizontal jacks 11 which are symmetrical on the steel bars 5 is read, wherein the readings of the intersection of the first supporting horizontal jack and the third supporting horizontal jack and the steel bars are respectively D1 and D2(D1 is more than D2), and the readings of the intersection of the second supporting horizontal jack and the fourth supporting horizontal jack and the steel bars are respectively D3 and D4(D3 is more than D4).
4) Calibrating a torsion angle measuring device; the laser pen 8 is fixed along an OC line on the device, the distance from the point O to the middle line of the graduated scale 15 is a fixed value L, the graduated scale 15 and the laser pen 8 are adjusted to be on the same horizontal line by adjusting the heights of the support rods at two sides for supporting the graduated scale 15, and the leveling is carried out through the leveling bubble 16 on the graduated scale 15;
5) the laser pen 8 is placed on the OA line and the OB line, the angle of the graduated scale 15 is adjusted, and when the absolute values of the two graduations are equal, the graduated scale 15 is placed correctly;
6) the four horizontal jacks 11 are pressurized in a grading way simultaneously to provide pile body torque, the reading psi of the laser pen 8 on the graduated scale 15 after each grade of pressurization is recorded, namely the torsion angle, and the loading load Q of each grade is recordedi(ii) a Under the action of the load, the torque of the pile is equal to Qi×(D1-D2)+Qi×(D3-D4) (ii) a And drawing a relation curve of the torsion angle and the applied torque, and judging whether the torsion is damaged or not by judging the change of the curve so as to obtain the maximum torque.
And (3) tensile torsion detection:
1) chiseling concrete at the top of a pile foundation 1, welding exposed reinforcing steel bars with a pile top steel plate 3, and backfilling the concrete until the concrete reaches the strength;
2) adjusting the distance between the two semi-annular steel plates of the base 2 according to the diameter of the pile foundation 1, tying the two semi-annular steel plates by using bolts 7 and fixing the two semi-annular steel plates on the ground;
3) fixing the reference beam 18 and the displacement meter 13 so that the displacement meter can measure the vertical displacement change between the reference beam 18 and the pile top steel plate 3;
4) two steel bars 5 respectively penetrate through two holes reserved in the pile foundation 1, two ends of each steel bar 5 are respectively fixed with a horizontal jack 11, and the distance between the horizontal jacks 11 which are symmetrical on the steel bars 5 is read, wherein the readings of the intersection of the first supporting horizontal jack and the third supporting horizontal jack and the steel bars are respectively D1 and D2(D1 is more than D2), and the readings of the intersection of the second supporting horizontal jack and the fourth supporting horizontal jack and the steel bars are respectively D3 and D4(D3 is more than D4).
5) Four tension-torsion-resistant detection vertical jacks 12 are symmetrically arranged between the bottom plate and the top plate and used for providing tension of a pile top;
6) preparing to start the test, pressurizing the tension-resistant detection vertical jack 12, and adding the pressure to a specified pressure; if the designated pressure is P, the pressure of each jack is P/4; observing the displacement change of the displacement meter 13 after the jack is pressurized, recording the displacement change along with time, and starting the next step of testing after the displacement is stable;
7) calibrating a torsion angle measuring device; the laser pen 8 is fixed along an OC line on the device, the distance from the point O to the middle line of the graduated scale 15 is a fixed value L, the graduated scale 15 and the laser pen 8 are adjusted to be on the same horizontal line by adjusting the heights of the support rods at two sides for supporting the graduated scale 15, and the leveling is carried out through the leveling bubble 16 on the graduated scale 15;
8) the laser pen 8 is placed on the OA line and the OB line, the angle of the graduated scale 15 is adjusted, and when the absolute values of the two graduations are equal, the graduated scale 15 is placed correctly;
9) the four horizontal jacks 11 are pressurized in a grading way simultaneously to provide pile body torque, the reading psi of the laser pen 8 on the graduated scale 15 after each grade of pressurization is recorded, namely the torsion angle, and the loading load Q of each grade is recordedi(ii) a Under the action of the load, the torque of the pile is equal to Qi×(D1-D2)+Qi×(D3-D4) (ii) a And drawing a relation curve of the torsion angle and the applied torque, and judging whether the torsion is damaged or not by judging the change of the curve so as to obtain the maximum torque.
And (3) detecting the compression torsion resistance:
1) chiseling concrete at the top of a pile foundation 1, welding exposed reinforcing steel bars with a pile top steel plate 3, and backfilling the concrete until the concrete reaches the strength;
2) adjusting the distance between the two semi-annular steel plates of the base 2 according to the diameter of the pile foundation 1, tying the two semi-annular steel plates by using bolts 7 and fixing the two semi-annular steel plates on the ground;
3) fixing the reference beam 18 and the displacement meter 13 so that the displacement meter can measure the vertical displacement change between the reference beam 18 and the pile top steel plate 3;
4) two steel bars 5 respectively penetrate through two holes reserved in the pile foundation 1, two ends of each steel bar 5 are respectively fixed with a horizontal jack 11, and the distance between the horizontal jacks 11 which are symmetrical on the steel bars 5 is read, wherein the readings of the intersection of the first supporting horizontal jack and the third supporting horizontal jack and the steel bars are respectively D1 and D2(D1 is more than D2), and the readings of the intersection of the second supporting horizontal jack and the fourth supporting horizontal jack and the steel bars are respectively D3 and D4(D3 is more than D4).
5) Two reaction frames 14 are symmetrically arranged on the base 2, and four anti-torsion detection vertical jacks 17 are symmetrically arranged between the pile top steel plate 3 and the two reaction frames 14 and used for providing pile top pressure;
6) preparing to start the test, pressurizing the torsion-resistant detection vertical jack 17, and adding the pressure to a specified pressure; if the designated pressure is P, the pressure of each jack is P/4; observing the displacement change of the displacement meter 13 after the jack is pressurized, recording the displacement change along with time, and starting the next step of testing after the displacement is stable;
7) calibrating a torsion angle measuring device; the laser pen 8 is fixed along an OC line on the device, the distance from the point O to the middle line of the graduated scale 15 is a fixed value L, the graduated scale 15 and the laser pen 8 are adjusted to be on the same horizontal line by adjusting the heights of the support rods at two sides for supporting the graduated scale 15, and the leveling is carried out through the leveling bubble 16 on the graduated scale 15;
8) the laser pen 8 is placed on the OA line and the OB line, the angle of the graduated scale 15 is adjusted, and when the absolute values of the two graduations are equal, the graduated scale 15 is placed correctly;
9) the four horizontal jacks 11 are pressurized in stages simultaneously to provide pile body torque, and after the pressurization of each stage is finished, the torque of the pile body is recordedThe reading psi of the laser pen 8 on the graduated scale 15 is the torsion angle, and the magnitude Q of each level of loading load is recordedi(ii) a Under the action of the load, the torque of the pile is equal to Qi×(D1-D2)+Qi×(D3-D4) (ii) a And drawing a relation curve of the torsion angle and the applied torque, and judging whether the torsion is damaged or not by judging the change of the curve so as to obtain the maximum torque.
As described above, the present invention is only a preferred embodiment, and is not limited in any way, for the offshore pile foundation 1, as shown in fig. 9, it is considered that the base 2 is replaced by a large buoyancy tank, and four corners of the large buoyancy tank are fixed on the seabed, so as to achieve the effect of measuring on water. Any simple modification, equivalent replacement, and improvement made to the above embodiments by those skilled in the art without departing from the technical scope of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a detection system is turned round in antitorque, anti pulling of pile foundation, resistance to compression which characterized in that: the device comprises a base, a pile foundation, a pile top steel plate, a reaction frame, a reference beam and a torsion angle measuring device; the method comprises the following steps that two steel bar channels are arranged on the part above the ground of a pile foundation, the height positions of the two steel bar channels are staggered, and the two steel bar channels are crossed in the direction to form an X shape; the base is arranged on the ground at the root of the pile foundation and is fixed with the ground. The base is composed of two semi-annular steel plates, two ends of each semi-annular steel plate are vertical connecting ends, the two semi-annular steel plates are placed in opposite directions and are spliced through the vertical connecting ends and surround the pile foundation, and the vertical connecting ends of the two semi-annular steel plates are anchored by bolts; welding a steel bar at the top of the pile foundation with a pile top steel plate, and placing a laser pen on the pile top steel plate; welding a steel block on the base, wherein the steel block is used for supporting the horizontal jack; the base is also provided with a tension-torsion-resistant detection vertical jack placing point, and the tension-torsion-resistant detection vertical jack is erected between the base and the pile top steel plate; the pile top steel plate is provided with a compression-resistant torsion detection vertical jack placing point, the base is provided with a reaction frame for downwards applying pressure to the pile top steel plate, and the compression-resistant torsion detection vertical jack is arranged between the pile top steel plate and the reaction frame; the utility model discloses a set up torsion angle measuring device in pile foundation and the outer one side of base, torsion angle measuring device be the scale that the level was set up, scale and pile top steel sheet on the laser pen be same height.
2. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: marking the O point at the center of the pile top steel plate, extending outwards to mark an OC line, placing a laser pen at the OC line, extending outwards from the O point at the center to mark two OA and OB lines at two sides of the OC line respectively, and forming an angle of 30 degrees with the OC line.
3. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: two steel bar channels reserved on the pile foundation are positioned from the lower part to the middle part of the pile foundation; the steel bar is characterized in that the middle of the steel bar is a circular pipe, the two ends of the steel bar are square heads, and the steel bar gradually changes from a circle to a square from a distance away from the middle to the two ends.
4. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: a reference beam is arranged above the middle point of the outer pile base of the base, a displacement meter is arranged on the reference beam, and the displacement meter is arranged between the reference beam and the pile top steel plate and used for measuring the vertical displacement change of the pile top.
5. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: the splicing distance of the connecting ends of the two semi-annular steel plates is adjusted through bolts; the device capable of moving up and down is a telescopic rod.
6. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: the installation of pile top steel plate does: chiseling the concrete at the top of the pile foundation to expose the reinforcing steel bars, welding the pile top steel plate with the exposed reinforcing steel bars, and backfilling the high-strength concrete below the pile top steel plate installed at the top of the pile foundation tightly after welding.
7. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: a leveling bubble is arranged in the middle of the graduated scale and used for leveling the graduated scale; the distance of the scale of the graduated scale projected on the graduated scale according to the rotating angle of the laser pen is farther away from the middle, and the scale is more sparse.
8. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: the tensile is turned round and is detected vertical jack mounting point, the resistance to compression is turned round and is detected vertical jack mounting point and be the slot-shaped, the tensile is turned round and is detected vertical jack, resistance to compression and is turned round and detect vertical jack lower part and all have the ball for when guaranteeing to pull to turn round or press to turn round the test, the jack that vertical direction provided pulling force or pressure can follow the foundation pile and twist round and take place the fine setting of horizontal direction, but the pulling force or the pressure that vertical direction provided are unchangeable.
9. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: the two welding steel blocks for supporting the horizontal jacks are respectively arranged on the two semi-annular steel plates and symmetrically distributed relative to the center of the pile foundation, and the four horizontal jacks are fixed together; the positions of the tension and torsion resistant detection vertical jacks are respectively two on the two semi-annular steel plates, and the four tension and torsion resistant detection vertical jacks are symmetrically distributed relative to the center of the pile foundation and are fixed together; the four compression-resistant torsion detection vertical jacks are symmetrically distributed relative to the center of the pile foundation, and are fixed together.
10. The pile foundation torsion resistance, tension torsion resistance and compression torsion resistance detection system according to claim 1, wherein: the two reaction frames are symmetrically arranged on the base; the torsion angle measuring device comprises a left supporting rod and a right supporting rod, the height of the left supporting rod and the height of the right supporting rod can be adjusted up and down, and a graduated scale is arranged between the two supporting rods.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112014221A (en) * | 2020-09-03 | 2020-12-01 | 西南石油大学 | Well drilling traction robot supporting mechanism testing arrangement |
| CN113155624A (en) * | 2021-02-26 | 2021-07-23 | 河海大学 | Device and method for testing surface strength of dredged sand concrete |
| CN116773378A (en) * | 2023-08-18 | 2023-09-19 | 无锡沃德倍斯科技有限公司 | Pen cap torsion tester and operation method thereof |
| CN117433926A (en) * | 2023-12-22 | 2024-01-23 | 华能科尔沁右翼前旗新能源有限公司 | Concrete test block detection device of wind power substation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101294961B1 (en) * | 2011-12-13 | 2013-08-09 | 재단법인 포항산업과학연구원 | Apparatus for lateral loading test of pile group and lateral loading testing method using the same |
| CN103115828B (en) * | 2013-01-25 | 2014-10-15 | 苏州科技学院 | Component combined torsion experimental device and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014221A (en) * | 2020-09-03 | 2020-12-01 | 西南石油大学 | Well drilling traction robot supporting mechanism testing arrangement |
| CN112014221B (en) * | 2020-09-03 | 2022-02-15 | 西南石油大学 | Well drilling traction robot supporting mechanism testing arrangement |
| CN113155624A (en) * | 2021-02-26 | 2021-07-23 | 河海大学 | Device and method for testing surface strength of dredged sand concrete |
| CN116773378A (en) * | 2023-08-18 | 2023-09-19 | 无锡沃德倍斯科技有限公司 | Pen cap torsion tester and operation method thereof |
| CN116773378B (en) * | 2023-08-18 | 2023-11-07 | 无锡沃德倍斯科技有限公司 | Pen cap torsion tester and operation method thereof |
| CN117433926A (en) * | 2023-12-22 | 2024-01-23 | 华能科尔沁右翼前旗新能源有限公司 | Concrete test block detection device of wind power substation |
| CN117433926B (en) * | 2023-12-22 | 2024-03-12 | 华能科尔沁右翼前旗新能源有限公司 | Concrete test block detection device of wind power substation |
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