CN107747279B - Construction device and implementation method based on group anchor system single tensioning and cable adjusting - Google Patents
Construction device and implementation method based on group anchor system single tensioning and cable adjusting Download PDFInfo
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- CN107747279B CN107747279B CN201710731102.4A CN201710731102A CN107747279B CN 107747279 B CN107747279 B CN 107747279B CN 201710731102 A CN201710731102 A CN 201710731102A CN 107747279 B CN107747279 B CN 107747279B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a construction device and an implementation method for single tensioning and cable adjusting based on a group anchor system. When the hydraulic pump station is used for tensioning, the hydraulic pump station controls the jack to tension the prestressed tendons, continuous tensioning is realized through alternate anchoring of the two anchor clamps until the prestressed tendons target to control the stress, and the computer system sends out a pressure maintaining signal of the hydraulic pump station to control the hydraulic pump station. After the signal output by the computer system or the information fed back by the monitoring sensor is calculated and analyzed, a jacking operation signal is sent to the hydraulic pump station to control the hydraulic jack, so that the automatic anchoring of the anchor clamps is realized. The device has made up the manual installation clamping piece, installation space is not enough, anchor stress accuracy is not high, the regulation of group anchor system cable force is difficult, the discreteness of group anchor prestressing tendons prestressing force is big, mechanized construction degree is not high grade shortcoming, has improved the efficiency of construction, is favorable to standardized, accurate construction.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a construction device and an implementation method for single tensioning and cable adjusting based on a group anchor system.
Background
The external prestress rib of the bridge structure and the stay cable of the group anchor system basically comprise coating layers, namely galvanization, epoxy spraying and the like, the effective prestress under the external prestress anchor, the uniformity of the prestress rib stress in the group anchor and the anchoring effect (slip) have absolute requirements in the specification, at present, the external prestress rib and the stay cable are installed and tensioned by adopting a limiting tensioning method, the coating layers are scraped in the tooth grooves of the anchor clamp due to the limiting limitation in the tensioning process, the anchoring efficiency of the anchor clamp is seriously influenced, the tensioning control force is influenced by structural deformation or environmental influence or temporary load influence and the like in the tensioning process, and all influence factors influence the accuracy of the tensioning control force; in the tensioning process, the clamping pieces are manually matched and are beaten to be anchored, the 'beating' can not be quantized, and the clamping piece installation uniformity is limited; after the tensioning is basically finished, other equipment is adopted for jacking, the working procedure is complex, and the jacking force of the clamping piece cannot be quantitatively controlled; when the force of the group anchor cable is adjusted, the distance between the prestress ribs of the group anchor is small, the manual operation space is insufficient, and the cable force adjustment is not facilitated.
Disadvantages of the current technology: 1. the clamping piece can be damaged by manual tightening, and the space positions of the two half clamping pieces after the clamping pieces are driven into the anchor holes are asymmetric; 2. the prestressed tendons have small spacing and limited operation space; 3. the manual tightening force is uneven, so that the prestress rib stress loss is larger, and the cable force discreteness is directly influenced; 4. the theoretical calculation fails to determine the uniformity of the construction process influence factors on the prestress rib cable force, the clamping piece installation force fails to be quantified, and the clamping piece jacking force fails to be quantified; 5. the construction automation is insufficient, and the construction intellectualization is insufficient.
Disclosure of Invention
The invention provides a construction device and an implementation method based on single tensioning and cable adjusting of a group anchor system, aiming at the problems that clamping piece damage, uneven tensioning force, cable force discreteness, clamping piece installation and jacking incapacity and the like are caused by manual tensioning in tensioning of existing external prestressed tendons and stay cables.
The invention adopts the following technical scheme to realize the purposes:
the construction device based on single tensioning and cable adjustment of the group anchor system is characterized by comprising a tensioning end anchor clamp (1), a supporting pad seat stay bar (3), a supporting pad seat panel (4), a pushing limiting pipe (5), a hydraulic jack (6), a stroke conversion supporting cylinder (7), a temporary anchor clamp I (8), a temporary anchor clamp II (9), a jack (11), a hydraulic pump station (12), a computer system (13), a fixed end anchor clamp (15) and a group anchor stay cable (16), wherein the group anchor stay cable (16) is connected with the tensioning end anchor clamp (1) and the fixed end anchor clamp (15); two ends of the supporting cushion seat stay bar (3) are respectively connected with an anchor plate I (101) of the tensioning end anchor clamp (1) and the supporting cushion seat panel (4); the pushing limiting pipe (5) passes through the supporting pad seat panel (4) to be connected with a piston of the hydraulic jack (6), and the hydraulic jack (6) is connected with the penetrating jack (11) through the stroke conversion supporting cylinder (7); a temporary anchor clamp I (8) is arranged in the stroke conversion supporting cylinder (7), and a temporary anchor clamp II (9) is arranged at one non-contact end of the jack (11) and the hydraulic jack (6); the hydraulic pump station (12) is respectively connected with the jack (11), the hydraulic jack (6) and the computer system (13). The principle is that the computer system (13) inputs the whole bundle control cable force F of the group anchor stay cable (16) and the relative displacement Deltal of the anchor point of the group anchor stay cable (16) under the action of the whole bundle control cable force F and the temperature change Deltat under the working condition, the computer system (13) outputs the first tensioning control force F1, the second tensioning control force F2, the nth tensioning control force Fn and the nth tensioning control force Fn of the prestressed tendons (14) to represent the number of the prestressed tendons; the computer system (13) sends out a signal according to the tensioning control force of the prestressed tendons (14) to control the hydraulic pump station (12), and the hydraulic pump station (12) pushes the pushing limiting pipe (5) through the pressure control hydraulic jacking device (6) to push the clamping piece into the anchor hole so as to complete the tensioning and jacking process.
Further, the construction device based on single tensioning and cable adjusting of the group anchor system further comprises a sensor (2) and a temporary anchor clamp III (10), wherein the temporary anchor clamp III (10) is pressed on the sensor (2), and the sensor (2) is connected with a computer system (13); the sensor (2) is arranged on a first prestress rib (1601) on a group anchor stay rope (16), and the installation position of the sensor (2) is any one of the end faces of an anchor plate I (101) of a tensioning end anchor clamp (1), the end face of an anchor plate II (1501) of a fixed end anchor clamp (15), and the first prestress rib (1601) between the tensioning end anchor clamp (1) and the fixed end clamp (15). The device collects control cable force formed by structural deformation of a first prestress rib (1601) through a sensor (2), and feeds the control cable force back to a computer system (13) to provide reference standards for other prestress ribs.
Further, the construction device based on the single tensioning and cable adjusting of the group anchor system further comprises a sensor (2), and the sensor (2) is connected with a computer system (13); the sensor (2) is arranged at any position between the fixed end anchor clamp (15) and the anchor backing plate II (1502) of the fixed end anchor clamp (15) or between the tension end anchor clamp (1) and the fixed end anchor clamp (15). The device collects control cable force formed by structural deformation of the mounted prestressed tendons through the sensor (2), and feeds the control cable force back to the computer system (13) to provide reference standard for other prestressed tendons.
Further, the section of the supporting pad seat panel (4) is of a porous position plate structure, and the hole positions are arranged the same as those of the anchor clamps (1) so as to facilitate the passage of the prestressed tendons.
Furthermore, the pushing limiting pipe (5) is of a cylindrical structure, the outer diameter of the pushing limiting pipe is smaller than the aperture of the supporting pad seat panel (4), and the height of the pushing limiting pipe (5) corresponds to the height of the supporting pad seat, so that the pushing limiting pipe (5) can move freely in the hole of the supporting pad seat panel (4).
Further, the stroke conversion supporting cylinder (7) is of a sleeve structure so as to meet the requirement that the core jack (11) realizes cylinder shrinkage return.
Further, the hydraulic jack (6) is divided into a front pressing plate (601), a jack main body (602) and a rear pressing plate (603), the front pressing plate (601) is pressed on the supporting pad seat panel (4), the rear pressing plate (6-3) is connected with the stroke conversion supporting cylinder (7) in a threaded mode, two ends of the hydraulic jack main body (602) are respectively connected with the front pressing plate (601) and the rear pressing plate (603), and the end face of the front pressing plate (601) is in a quincuncial shape in structure, so that interference with surrounding prestressed tendons is avoided.
The implementation method of the construction device based on the single tensioning and cable adjusting of the group anchor system is characterized by comprising the following steps: step one, when the prestressed tendons (14) are initially tensioned, inputting the whole bundle control cable force F of the group anchor body inhaul cables (16), the relative displacement delta l of the anchoring points of the group anchor body inhaul cables (16) under the action of the whole bundle control cable force F and the temperature change delta t under the working condition into a computer system (13), and outputting a first tensioning control force F1, a second tensioning control force F2, a third and an nth tensioning control force Fn of the prestressed tendons (14) to be tensioned by the computer system (13), wherein n represents the number of the prestressed tendons; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, a computer system (13) sends out a signal according to the tensioning control force of the prestressed tendons (14) to control a hydraulic pump station (12), the hydraulic pump station (12) pushes the pushing limiting pipe (5) through a pressure control hydraulic jacking device (6), and the clamping piece is pushed into the anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting pad seat stay bar (3), the supporting pad seat panel (4), the pushing limiting pipe (5), the hydraulic jack (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11) after tensioning and jacking are completed, shifting to the next prestress rib to be tensioned, and repeating the second step to the fifth step.
The implementation method of the construction device based on the single tensioning and cable adjusting of the group anchor system is characterized by comprising the following steps: step one, installing a sensor (2) according to control cable force when the prestressed tendons (14) are initially tensioned; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, the tension control cable force of other prestressed tendons is acquired by a sensor (2) and is fed back to a computer system (13), at the moment, the computer system (13) sends a signal to control a hydraulic pump station (12), the hydraulic pump station (12) pushes a pushing limiting pipe (5) through a pressure control hydraulic jack (6), and a clamping piece is pushed into an anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting cushion seat stay bar (3), the supporting cushion seat panel (4), the pushing limiting pipe (5), the hydraulic jacking device (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11), shifting to the next prestress rib, and repeating the second to fifth steps.
The implementation method of the construction device based on the single tensioning and cable adjusting of the group anchor system is characterized by comprising the following steps: step one, installing a sensor (2) according to control cable force when the prestressed tendons (14) are initially tensioned; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, the tension control cable force of other prestressed tendons is acquired by a sensor (2) and is fed back to a computer system (13), at the moment, the computer system (13) sends a signal to control a hydraulic pump station (12), the hydraulic pump station (12) pushes a pushing limiting pipe (5) through a pressure control hydraulic jack (6), and the clamping piece is pushed into an anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting cushion seat stay bar (3), the supporting cushion seat panel (4), the pushing limiting pipe (5), the hydraulic jacking device (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11), shifting to the next prestress rib, and repeating the second to fifth steps.
The beneficial effects of the invention are as follows:
1. the continuous tensioning and jacking anchoring of the prestressed tendons are realized, and the working efficiency is greatly improved.
2. The method solves the problems that the cable force of the group anchor system is difficult to adjust, the prestress of the group anchor prestress rib is large in discreteness, and the anchorage stress of the clamping piece is difficult to quantitatively control.
3. The pushing limiting pipe can enable the end faces of the two half clamping pieces to be flush and enter the anchor hole, the end faces after anchoring are flush, and standardized construction is facilitated.
4. The anchoring work clamping piece does not need to be repeatedly pressed, only the anchoring clamping piece is required to be pressed in a one-time mode when the tensioning reaches the target cable force, the prestressed tendon coating layer is reduced to be scraped in the tooth groove of the anchor clamp, and the anchoring efficiency of the anchor clamp can be better guaranteed.
5. The accurate control of the effective stress of the tensioning of the prestressed tendons is realized, and the accurate construction is facilitated.
Drawings
Fig. 1 is a schematic diagram of a construction device based on single tensioning and cable adjusting of a group anchor system, which is controlled by theoretical calculation.
Fig. 2 is a schematic diagram of the construction device based on single tensioning and cable adjusting of the group anchor system controlled by the sensor.
Fig. 3 is a schematic diagram of the construction device controlled by the sensor and based on the group anchor system in the use state.
Fig. 4 is a schematic diagram of a construction device based on group anchor system single tensioning and cable adjusting in the invention when a sensor is mounted on the end face of a fixed end anchor clamp.
Fig. 5 is a schematic diagram of a sensor installed on a guy cable between a tensioning end and a fixed end anchor clamp in the construction device based on single tensioning and guy cable of a group anchor system according to the present invention.
Fig. 6 is a schematic diagram of the construction device based on group anchor system single tensioning and cable adjusting in the invention when the sensor is installed between the anchor clamps and the anchor pad.
Fig. 7 is a block diagram of a hydraulic jack in the construction device based on single tensioning and cable adjusting of the group anchor system.
In the figure, 1, stretching an end anchor clamp; 101. an anchor plate I; 102. an anchor backing plate I; 2. a sensor; 3. a support pad support rod; 4. a support cushion panel; 5. pushing the limiting tube; 6. a hydraulic jack; 7. a stroke conversion support cylinder; 8. temporary anchor clamps I; 9. a temporary anchor clamp II; 10. temporary anchor clamps III; 11. a jack; 12. a hydraulic pump station; 13. a computer system; 14. prestress rib; 15. fixing an end anchor clamp; 1501. an anchor plate II; 1502. an anchor backing plate II; 16. group anchor body inhaul cable; 1601. and a first tendon.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 7.
As shown in fig. 1, the construction device based on single tensioning and cable adjustment of the group anchor system comprises a tensioning end anchor clamp (1), a supporting pad seat stay bar (3), a supporting pad seat panel (4), a pushing limiting pipe (5), a hydraulic jack (6), a stroke conversion supporting cylinder (7), a temporary anchor clamp I (8), a temporary anchor clamp II (9), a jack (11), a hydraulic pump station (12), a computer system (13), a fixed end anchor clamp (15) and a group anchor stay cable (16), wherein the group anchor stay cable (16) is connected with the tensioning end anchor clamp (1) and the fixed end anchor clamp (15); two ends of the supporting cushion seat stay bar (3) are respectively connected with an anchor plate I (101) of the tensioning end anchor clamp (1) and the supporting cushion seat panel (4); the pushing limiting pipe (5) passes through the supporting pad seat panel (4) to be connected with a piston of the hydraulic jack (6), and the hydraulic jack (6) is connected with the penetrating jack (11) through the stroke conversion supporting cylinder (7); a temporary anchor clamp I (8) is arranged in the stroke conversion supporting cylinder (7), and a temporary anchor clamp II (9) is arranged at one non-contact end of the jack (11) and the hydraulic jack (6); the hydraulic pump station (12) is respectively connected with the jack (11), the hydraulic jack (6) and the computer system (13). The construction method of the device comprises the following steps: step one, when the prestressed tendons (14) are initially tensioned, inputting the whole bundle control cable force F of the group anchor body inhaul cables (16), the relative displacement delta l of the anchoring points of the group anchor body inhaul cables (16) under the action of the whole bundle control cable force F and the temperature change delta t under the working condition into a computer system (13), and outputting a first tensioning control force F1, a second tensioning control force F2, a third and an nth tensioning control force Fn of the prestressed tendons (14) to be tensioned by the computer system (13), wherein n represents the number of the prestressed tendons; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, a computer system (13) sends out a signal according to the tensioning control force of the prestressed tendons (14) to control a hydraulic pump station (12), the hydraulic pump station (12) pushes the pushing limiting pipe (5) through a pressure control hydraulic jacking device (6), and the clamping piece is pushed into the anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting pad seat stay bar (3), the supporting pad seat panel (4), the pushing limiting pipe (5), the hydraulic jack (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11) after tensioning and jacking are completed, shifting to the next prestress rib to be tensioned, and repeating the second step to the fifth step.
As shown in fig. 2-5, the construction device based on single tensioning and cable adjustment of the group anchor system comprises a tensioning end anchor clamp (1), a sensor (2), a supporting pad seat stay bar (3), a supporting pad seat panel (4), a pushing limiting pipe (5), a hydraulic jack (6), a stroke conversion supporting cylinder (7), a temporary anchor clamp I (8), a temporary anchor clamp II (9), a temporary anchor clamp III (10), a jack (11), a hydraulic pump station (12), a computer system (13), a fixed end anchor clamp (15) and a group anchor stay cable (16), wherein the group anchor stay cable (16) is connected with the tensioning end anchor clamp (1) and the fixed end anchor clamp (15); two ends of the supporting cushion seat stay bar (3) are respectively connected with an anchor plate I (101) of the tensioning end anchor clamp (1) and the supporting cushion seat panel (4); the pushing limiting pipe (5) passes through the supporting pad seat panel (4) to be connected with a piston of the hydraulic jack (6), and the hydraulic jack (6) is connected with the penetrating jack (11) through the stroke conversion supporting cylinder (7); a temporary anchor clamp I (8) is arranged in the stroke conversion supporting cylinder (7), and a temporary anchor clamp II (9) is arranged at one non-contact end of the jack (11) and the hydraulic jack (6); the hydraulic pump station (12) is respectively connected with the jack (11), the hydraulic jack (6) and the computer system (13); the temporary anchor clamp III (10) is pressed on the sensor (2), and the sensor (2) is connected with the computer system (13); the sensor (2) is arranged on a first prestress rib (1601) on a group anchor stay rope (16), and the installation position of the sensor (2) is any one of the end face of an anchor plate I (101) of a tensioning end anchor clamp (1), the end face of an anchor plate II (1501) of a fixed end anchor clamp (15), and the first prestress rib (1601) between the tensioning end anchor clamp (1) and the fixed end anchor clamp (15). The construction steps by adopting the device are as follows: step one, installing a sensor (2) according to control cable force when the prestressed tendons (14) are initially tensioned; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, the tension control cable force of other prestressed tendons is acquired by a sensor (2) and is fed back to a computer system (13), at the moment, the computer system (13) sends a signal to control a hydraulic pump station (12), the hydraulic pump station (12) pushes a pushing limiting pipe (5) through a pressure control hydraulic jack (6), and a clamping piece is pushed into an anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting cushion seat stay bar (3), the supporting cushion seat panel (4), the pushing limiting pipe (5), the hydraulic jacking device (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11), shifting to the next prestress rib, and repeating the second to fifth steps.
As shown in fig. 6, a construction device based on single tensioning and cable adjustment of a group anchor system comprises a tensioning end anchor clamp (1), a sensor (2), a supporting pad seat stay bar (3), a supporting pad seat panel (4), a pushing limiting pipe (5), a hydraulic jack (6), a stroke conversion supporting cylinder (7), a temporary anchor clamp I (8), a temporary anchor clamp II (9), a jack (11), a hydraulic pump station (12), a computer system (13), a fixed end anchor clamp (15) and a group anchor stay cable (16), wherein the group anchor stay cable (16) is connected with the tensioning end anchor clamp (1) and the fixed end anchor clamp (15); two ends of the supporting cushion seat stay bar (3) are respectively connected with an anchor plate I (101) of the tensioning end anchor clamp (1) and the supporting cushion seat panel (4); the pushing limiting pipe (5) passes through the supporting pad seat panel (4) to be connected with a piston of the hydraulic jack (6), and the hydraulic jack (6) is connected with the penetrating jack (11) through the stroke conversion supporting cylinder (7); a temporary anchor clamp I (8) is arranged in the stroke conversion supporting cylinder (7), and a temporary anchor clamp II (9) is arranged at one non-contact end of the jack (11) and the hydraulic jack (6); the hydraulic pump station (12) is respectively connected with the jack (11), the hydraulic jack (6) and the computer system (13); the sensor (2) is connected with the computer system (13); the sensor (2) is arranged between the tension end anchor clamp (1) and the anchor backing plate I (102) of the tension end anchor clamp (1). The construction steps by adopting the device are as follows: step one, installing a sensor (2) according to control cable force when the prestressed tendons (14) are initially tensioned; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, the tension control cable force of other prestressed tendons is acquired by a sensor (2) and is fed back to a computer system (13), at the moment, the computer system (13) sends a signal to control a hydraulic pump station (12), the hydraulic pump station (12) pushes a pushing limiting pipe (5) through a pressure control hydraulic jack (6), and the clamping piece is pushed into an anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting cushion seat stay bar (3), the supporting cushion seat panel (4), the pushing limiting pipe (5), the hydraulic jacking device (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11), shifting to the next prestress rib, and repeating the second to fifth steps.
As shown in fig. 7, a construction device based on single tensioning and cable adjusting of a group anchor system is characterized in that a hydraulic jacking device (6) is divided into a front pressing plate (601), a jacking device main body (602) and a rear pressing plate (603), the front pressing plate (601) is pressed on a supporting pad seat panel (4), the rear pressing plate (603) is connected with a stroke conversion supporting cylinder (7) in a threaded mode, two ends of the jacking device main body (602) are respectively connected with the front pressing plate (601) and the rear pressing plate (603), and the end face structure of the front pressing plate (601) is plum blossom-shaped.
Claims (10)
1. The construction device based on single tensioning and cable adjustment of the group anchor system is characterized by comprising a tensioning end anchor clamp (1), a supporting pad seat stay bar (3), a supporting pad seat panel (4), a pushing limiting pipe (5), a hydraulic jack (6), a stroke conversion supporting cylinder (7), a temporary anchor clamp I (8), a temporary anchor clamp II (9), a jack (11), a hydraulic pump station (12), a computer system (13), a fixed end anchor clamp (15) and a group anchor stay cable (16), wherein the group anchor stay cable (16) is connected with the tensioning end anchor clamp (1) and the fixed end anchor clamp (15); two ends of the supporting cushion seat stay bar (3) are respectively connected with an anchor plate I (101) of the tensioning end anchor clamp (1) and the supporting cushion seat panel (4); the pushing limiting pipe (5) passes through the supporting pad seat panel (4) to be connected with a piston of the hydraulic jack (6), and the hydraulic jack (6) is connected with the penetrating jack (11) through the stroke conversion supporting cylinder (7); a temporary anchor clamp I (8) is arranged in the stroke conversion supporting cylinder (7), and a temporary anchor clamp II (9) is arranged at one non-contact end of the jack (11) and the hydraulic jack (6); the hydraulic pump station (12) is respectively connected with the jack (11), the hydraulic jack (6) and the computer system (13).
2. The construction device based on single tensioning and cable adjusting of group anchor system according to claim 1, further comprising a sensor (2) and a temporary anchor clamp III (10), wherein the temporary anchor clamp III (10) is pressed on the sensor (2), and the sensor (2) is connected with a computer system (13); the sensor (2) is arranged on a first prestress rib (1601) of a group anchor stay rope (16), and the installation position of the sensor (2) is any one of the end face of an anchor plate I (101) of a tensioning end anchor clamp (1), the end face of an anchor plate II (1501) of a fixed end anchor clamp (15), and the first prestress rib (1601) between the tensioning end anchor clamp (1) and the fixed end anchor clamp (15).
3. The construction device based on single tensioning and cable adjusting of group anchor system according to claim 1, further comprising a sensor (2), wherein the sensor (2) is connected with a computer system (13); the sensor (2) is arranged at any position between the fixed end anchor clamp (15) and the anchor backing plate II (1502) of the fixed end anchor clamp (15) or between the tension end anchor clamp (1) and the fixed end anchor clamp (15).
4. A construction device based on single tensioning and cable adjusting of group anchor system according to any of claims 2 or 3, characterized in that the section of the supporting pad seat panel (4) is of a porous position structure, and the hole sites are arranged in the same as the hole sites of the tensioning end anchor clamps (1).
5. A construction device based on single tensioning and cable adjusting of group anchor system according to any one of claims 2 or 3, wherein the pushing limiting tube (5) is of a cylindrical structure, the outer diameter of which is smaller than the aperture of the supporting pad seat panel (4), and the height of the pushing limiting tube (5) corresponds to the height of the supporting pad seat panel (4).
6. A group anchor system single tensioning and cable adjusting-based construction device according to any one of claims 2 or 3, characterized in that the travel conversion support cylinder (7) is of a sleeve structure.
7. The construction device based on single tensioning and cable adjusting of group anchor system according to claim 2, wherein the hydraulic jacking device (6) is divided into a front pressing plate (601), a jacking device main body (602) and a rear pressing plate (603), the front pressing plate (601) is pressed on the supporting pad seat panel (4), the rear pressing plate (603) is connected with the stroke conversion supporting cylinder (7) in a threaded mode, two ends of the jacking device main body (602) are respectively connected with the front pressing plate (601) and the rear pressing plate (603), and the end face of the front pressing plate (601) is in a quincuncial shape.
8. An implementation method of the construction device based on group anchor system single tensioning and cable adjusting by using the group anchor system single tensioning and cable adjusting device as claimed in claim 1, which is characterized by comprising the following steps: step one, when the prestressed tendons (14) are initially tensioned, inputting the whole bundle control cable force F of the group anchor body inhaul cables (16), the relative displacement delta l of the anchoring points of the group anchor body inhaul cables (16) under the action of the whole bundle control cable force F and the temperature change delta t under the working condition into a computer system (13), and outputting a first tensioning control force F1, a second tensioning control force F2 and an nth tensioning control force Fn of the prestressed tendons (14) by the computer system (13), wherein n represents the number of the prestressed tendons; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, a computer system (13) sends out a signal according to the tensioning control force of the prestressed tendons (14) to control a hydraulic pump station (12), the hydraulic pump station (12) pushes the pushing limiting pipe (5) through a pressure control hydraulic jacking device (6), and the clamping piece is pushed into the anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting pad seat stay bar (3), the supporting pad seat panel (4), the pushing limiting pipe (5), the hydraulic jack (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11) after tensioning and jacking are completed, shifting to the next prestress rib to be tensioned, and repeating the second step to the fifth step.
9. An implementation method of the construction device based on group anchor system single tensioning and cable adjusting by using the group anchor system single tensioning and cable adjusting device as claimed in claim 2, which is characterized by comprising the following steps: step one, installing a sensor (2) according to control cable force when the prestressed tendons (14) are initially tensioned; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, the tension control cable force of other prestressed tendons is acquired by a sensor (2) and is fed back to a computer system (13), at the moment, the computer system (13) sends a signal to control a hydraulic pump station (12), the hydraulic pump station (12) pushes a pushing limiting pipe (5) through a pressure control hydraulic jack (6), and a clamping piece is pushed into an anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting cushion seat stay bar (3), the supporting cushion seat panel (4), the pushing limiting pipe (5), the hydraulic jacking device (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11), shifting to the next prestress rib, and repeating the second to fifth steps.
10. An implementation method of the construction device based on the group anchor system single tensioning and cable adjusting of claim 3, which is characterized by comprising the following steps: step one, installing a sensor (2) according to control cable force when the prestressed tendons (14) are initially tensioned; step two, the prestressed tendons (14) are anchored on the tensioning end anchor clamp (1) and the fixed end anchor clamp (15) through working clamps, the jack (11), the stroke conversion supporting cylinder (7), the hydraulic jacking device (6) and the pushing limiting pipe (5) are combined into a whole, all penetrate into the prestressed tendons (14), and the pushing limiting pipe (5) simultaneously penetrates through the supporting pad seat panel (4) to reach the front end of the working clamping piece; step three, when the prestressed tendons (14) are tensioned, the prestressed tendons (14) and the clamping pieces are synchronously pulled out, the clamping pieces are limited by the pushing limiting pipe (5) to be positioned in the anchor holes after the pulling out, continuous tensioning is realized through alternate anchoring of the temporary anchor clamps I (8) and the temporary anchor clamps II (9), and the working clamping pieces are in a suspended state in the continuous tensioning process; in the tensioning process, the tension control cable force of other prestressed tendons is acquired by a sensor (2) and is fed back to a computer system (13), at the moment, the computer system (13) sends a signal to control a hydraulic pump station (12), the hydraulic pump station (12) pushes a pushing limiting pipe (5) through a pressure control hydraulic jack (6), and the clamping piece is pushed into an anchor hole to complete primary tensioning and jacking; and fifthly, removing the supporting cushion seat stay bar (3), the supporting cushion seat panel (4), the pushing limiting pipe (5), the hydraulic jacking device (6), the stroke conversion supporting cylinder (7), the temporary anchor clamp I (8), the temporary anchor clamp II (9) and the jack (11), shifting to the next prestress rib, and repeating the second to fifth steps.
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| CN109457614A (en) * | 2018-09-30 | 2019-03-12 | 柳州欧维姆结构检测技术有限公司 | Parallel steel stranded wire stayed Cable Construction Suo Li uniformity monitors system and construction method |
| CN109083022B (en) * | 2018-09-30 | 2023-05-23 | 柳州欧维姆结构检测技术有限公司 | System and method for monitoring construction cable force uniformity of parallel steel strand stay cable |
| CN111140019A (en) * | 2020-01-15 | 2020-05-12 | 柳州市桥厦工程有限公司 | Intelligent control's suspension tensioning equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001059344A (en) * | 1999-08-23 | 2001-03-06 | Maruei Concrete Industries Co Ltd | Prestressing device for prestressing strand |
| CN1424465A (en) * | 2003-01-08 | 2003-06-18 | 柳州市威尔姆预应力有限公司 | Low stressed self anchoring method for group anchor steel tension cables |
| CN1458347A (en) * | 2002-05-15 | 2003-11-26 | 柳州市建筑机械总厂 | Single stay tensing construction method and apparatus for parallel twisted steel stay system |
| JP2007023654A (en) * | 2005-07-19 | 2007-02-01 | Sumitomo Denko Steel Wire Kk | Anchor and tension load change measuring method |
| KR100834021B1 (en) * | 2007-02-15 | 2008-06-02 | 주식회사 에스제이지반기술 | Re-tentionable anchor system |
| CN204662284U (en) * | 2015-04-17 | 2015-09-23 | 柳州欧维姆工程有限公司 | For changing withdrawing steel wire and the hole cleaning device assembly of the old suspension rod of arched bridge pre-stressed boom |
| JP6117898B1 (en) * | 2015-11-25 | 2017-04-19 | 中日本高速技術マーケティング株式会社 | Structure-tightening method |
| CN207259966U (en) * | 2017-08-23 | 2018-04-20 | 柳州欧维姆机械股份有限公司 | A kind of constructing device based on group's anchor system single tendon stretch and tune rope |
-
2017
- 2017-08-23 CN CN201710731102.4A patent/CN107747279B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001059344A (en) * | 1999-08-23 | 2001-03-06 | Maruei Concrete Industries Co Ltd | Prestressing device for prestressing strand |
| CN1458347A (en) * | 2002-05-15 | 2003-11-26 | 柳州市建筑机械总厂 | Single stay tensing construction method and apparatus for parallel twisted steel stay system |
| CN1424465A (en) * | 2003-01-08 | 2003-06-18 | 柳州市威尔姆预应力有限公司 | Low stressed self anchoring method for group anchor steel tension cables |
| JP2007023654A (en) * | 2005-07-19 | 2007-02-01 | Sumitomo Denko Steel Wire Kk | Anchor and tension load change measuring method |
| KR100834021B1 (en) * | 2007-02-15 | 2008-06-02 | 주식회사 에스제이지반기술 | Re-tentionable anchor system |
| CN204662284U (en) * | 2015-04-17 | 2015-09-23 | 柳州欧维姆工程有限公司 | For changing withdrawing steel wire and the hole cleaning device assembly of the old suspension rod of arched bridge pre-stressed boom |
| JP6117898B1 (en) * | 2015-11-25 | 2017-04-19 | 中日本高速技術マーケティング株式会社 | Structure-tightening method |
| CN207259966U (en) * | 2017-08-23 | 2018-04-20 | 柳州欧维姆机械股份有限公司 | A kind of constructing device based on group's anchor system single tendon stretch and tune rope |
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