Preloading device capable of continuously locking

Abstract

The utility model relates to a preloading device capable of continuously locking. The preloading device comprises a counter-force frame, a jack and a pile feeding frame, the counter-force frame is a door-shaped counter-force frame, the counter-force frame is fixed on a bearing foundation plate of a foundation, and the center of the counter-force frame is aligned with a hole core of a pile sealing hole of the bearing foundation plate; an anchor rod static pressure pile is pressed into a foundation along a pile sealing hole, a pile feeding frame is placed on the upper end face of the anchor rod static pressure pile, a continuous locking device is placed on the upper end face of the pile feeding frame, a steel base plate is placed between the lower portion of the continuous locking device and the pile feeding frame, and the upper portion of the continuous locking device abuts against a counter-force frame. The jack is placed in the continuous locking device, the continuous locking device can load the pile feeding frame through pressure applied by the jack, and the continuous locking device can be locked in a graded mode according to graded loading of the jack. The device has the advantages of being high in equipment utilization rate and capable of achieving graded loading and optimizing the reinforcing effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foundation construction, especially relates to a continuous locking preloading device. BACKGROUND

[0002] The preloading technology is usually used for holding and sealing the anchor rod static pressure pile in the foundation reinforcement, and the required load is applied on the pile top once, and then the sealing is carried out immediately, and then the holding jack is removed after the strength of the sealing material reaches the standard. That is, the continuous load is sealed immediately to the target load, and the jack is removed when the strength of the sealing material reaches the standard. The existing preloading technology has the following problems: 1. The jack cannot be removed all the time, and the jack can be removed only when the strength of the sealing material reaches the standard, so the utilization rate of the equipment is not high; 2. The step loading cannot be realized, and the final target value needs to be loaded at one time, so the reinforcement effect is not ideal. SUMMARY

[0003] The utility model discloses a continuous locking preloading device with high equipment utilization rate, step loading and optimized reinforcement effect.

[0004] The utility model discloses a continuous locking preloading device that includes a counterforce frame, a jack and a pile feeding frame. The counterforce frame is a door-shaped counterforce frame, and the center of the counterforce frame is aligned with the hole core of the sealing hole of the bearing foundation plate. The anchor rod static pressure pile is pressed into the foundation along the sealing hole. The pile feeding frame is placed on the upper end surface of the anchor rod static pressure pile, and the upper end surface of the pile feeding frame is placed with a continuous locking device. A steel pad is placed between the lower part of the continuous locking device and the pile feeding frame, and the upper part of the continuous locking device is in contact with the counterforce frame. The jack is placed in the continuous locking device, and the continuous locking device can load the pile feeding frame through the pressure of the jack. The continuous locking device can be locked step by step according to the step loading of the jack.

[0005] Compared with the prior art, the continuous locking device is set, the jack can be removed immediately after the required prestress is loaded, the equipment utilization rate is improved, the step loading can be realized through the continuous locking, and the final target value does not need to be loaded at one time, which is beneficial to optimizing the reinforcement effect.

[0006] As preferred, the continuous locking device comprises an upper top plate, a lower top plate, a force holding pipe column and a locking assembly, the force holding pipe column is provided with four and is respectively fixed on four end corners of the lower top plate, one end of the locking assembly is inserted into the force holding pipe column, and the other end is fixed with the upper top plate, the upper top plate is abutted with the counterforce frame, the lower top plate is abutted with the steel cushion plate, and the jack is abutted between the upper top plate and the lower top plate; through the arrangement of the above structure, the anchoring static pressure pile can be loaded to apply load to make it equivalent stress under the cooperation of the locking assembly and the jack, the stress relaxation of the stress process can be compensated by subsequent multiple loading, the stress adjustment can be realized by combining with the monitoring data analysis and the synchronous preloading of multiple piles, and the pile sealing is carried out after the target is reached, and the final load holding size can be adjusted through the data in the load holding process, so that the reinforcement effect is optimized.

[0007] As preferred, the locking assembly comprises a screw rod and a nut, one end of the screw rod is inserted into the force holding pipe column, the other end of the screw rod is fixed on the upper top plate, and the nut is screwed on the screw rod and abutted on the upper end of the force holding pipe column; through the arrangement of the above structure, the anchoring static pressure pile can be loaded in stages through the rotation of the nut, the instant preloading is realized, and the sealing time and the final preloading size can be flexibly mastered according to the monitoring data in the construction process.

[0008] As preferred, the counterforce frame comprises a pier, a bottom plate and a cross beam, the pier is provided with two, the cross beam is fixed on the two piers which are symmetrically distributed, the two piers are fixed on the bottom plate, and the bottom plate is fixed on the bearing foundation plate through the expansion bolt assembly; through the arrangement of the above structure, the processing and manufacturing are simple, and the stability after installation is good.

[0009] As preferred, the pile feeding frame comprises an upper bearing plate, a lower bearing plate and a steel pipe, the steel pipe is fixed between the upper bearing plate and the lower bearing plate by welding and forms a pile feeding frame with a H-shaped cross section; through the arrangement of the above structure, the contact area between the pile feeding frame and the anchoring static pressure pile and the continuous locking device is larger, and the loading stability is better.

[0010] As preferred, the anchoring static pressure pile comprises a pile body, an angle iron reinforcing block and a pile top anchor, the four corners of the top of the pile body are provided with angle iron blocks, the angle iron reinforcing block is welded and fixed on the side of the angle iron block, and the pile top anchor is welded and fixed on the upper end of the angle iron block and abuts with the end corner of the angle iron reinforcing block; after the anchoring static pressure pile is loaded, through the arrangement of the above structure, the transverse load resistance of the pile sealing hole is better after the pile is sealed. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1This is a schematic diagram of the main structure of the continuously locking preloading device of this utility model.

[0012] Figure 2 This is a top view schematic diagram of the continuously locking preloading device of this utility model.

[0013] Figure 3 yes Figure 1 A magnified structural diagram at point A.

[0014] The labels in the attached diagram are as follows: 1. Reaction frame; 2. Jack; 3. Pile driver; 4. Foundation; 5. Bearing base plate; 6. Anchored static pressure pile; 7. Continuous locking device; 8. Steel pad; 11. Pier; 12. Base plate; 13. Crossbeam; 14. Expansion bolt assembly; 31. Upper bearing plate; 32. Lower bearing plate; 33. Steel pipe; 51. Pile sealing hole; 61. Pile body; 62. Angle iron reinforcing block; 63. Pile top anchor bar; 64. Angle iron block; 71. Upper top plate; 72. Lower top plate; 73. Bearing pipe column; 74. Locking assembly; 74-1. Screw; 74-2. Nut. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 3 As shown, this utility model includes a reaction frame 1, a jack 2, and a pile driving frame 3. The reaction frame 1 is a door-shaped reaction frame, which is fixed on the bearing base plate 5 of the foundation 4, and the center of the reaction frame 1 is aligned with the core of the sealing hole 51 of the bearing base plate 5. Anchor static pressure piles 6 are pressed into the foundation 4 along the sealing hole 51. The pile driving frame 3 rests on the upper end surface of the anchor static pressure piles 6. A continuous locking device 7 is placed on the upper end surface of the pile driving frame 3, and a steel pad 8 is placed between the lower part of the continuous locking device 7 and the pile driving frame 3. The upper part of the continuous locking device 7 abuts against the reaction frame 1. The jack 2 is placed inside the continuous locking device 7, and the continuous locking device 7 can load the pile driving frame 3 by applying pressure through the jack 2. The continuous locking device 7 can lock in stages according to the staged loading of the jack 2.

[0016] The continuous locking device 7 includes an upper top plate 71, a lower top plate 72, a force-bearing column 73, and a locking assembly 74. The force-bearing column 73 is provided with four columns and is fixed to the four corners of the lower top plate 72 respectively. One end of the locking assembly 74 is inserted into the force-bearing column 73, and the other end is fixed to the upper top plate 71. The upper top plate 71 abuts against the reaction frame 1, the lower top plate 72 abuts against the steel pad 8, and the jack 2 abuts against the upper top plate 71 and the lower top plate 72.

[0017] The locking assembly 74 includes a screw 74-1 and a nut 74-2. One end of the screw 74-1 is inserted into the bearing column 73, and the other end of the screw 74-1 is fixed to the upper top plate 71. The nut 74-2 is screwed onto the screw 74-1 and abuts against the upper end of the bearing column 73. The length of the screw 74-1 inside the bearing column 73 is greater than the loading stroke of the anchor static pressure pile 6, which can prevent the screw 74-1 from detaching from the bearing column 73.

[0018] The reaction frame 1 includes piers 11, a base plate 12, and a crossbeam 13. There are two piers 11, and the crossbeam 13 is fixed on the two symmetrically distributed piers 11. The two piers 11 are fixed on the base plate 12, and the base plate 12 is fixed to the bearing base plate 5 by expansion bolt assemblies 14. The length of the piers 11 is equal to or slightly greater than the entire continuous locking device 7, so that the continuous locking device 7 is located above the bearing base plate 5.

[0019] The pile driving frame 3 includes an upper support plate 31, a lower support plate 32, and a steel pipe 33. The steel pipe 33 is fixed between the upper support plate 31 and the lower support plate 32 by welding, forming a pile driving frame 3 with an I-shaped cross-section.

[0020] The anchor static pressure pile 6 includes a pile body 61, angle iron reinforcing blocks 62, and pile top anchor bars 63. Angle iron blocks 64 are provided at the four corners of the pile top of the pile body 61. The angle iron reinforcing blocks 62 are welded and fixed to the side of the angle iron blocks 64, and the pile top anchor bars 63 are welded and fixed to the upper end of the angle iron blocks 64 and abut against the end corner of the angle iron reinforcing blocks 62.

[0021] The loading principle of this utility model is as follows: First, the anchor static pressure pile 6 with the pile top anchor bar 63 is pressed into the foundation 4; then, the reaction frame 1 is installed on the bearing foundation plate 5, and the pile driving frame 3, continuous locking device 7, and jack 2 are placed on the anchor static pressure pile 6, so that the upper top plate 71 of the continuous locking device 7 abuts against the reaction frame 1. If there is still a gap, then a steel pad 8 is placed between the lower top plate 72 of the continuous locking device 7 and the anchor static pressure pile 6; finally, the anchor static pressure pile 6 is loaded by the force applied by the jack 2. Next, rotate nut 74-2 and abut it against the upper end of bearing column 73. At this time, jack 2 is in a state of no force. Since it is not necessary to seal the pile immediately, the stress relaxation during the stress process can be compensated by subsequent multiple loading. Combined with monitoring data analysis and synchronous preloading of multiple piles, stress adjustment can be achieved. After the target is reached, the pile is sealed. Since the final load can be adjusted by the data during the load holding process, the timing of pile sealing and the final preload can be flexibly controlled according to the monitoring data of the construction process while achieving real-time preloading.

[0022] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A continuously lockable preloading device, comprising a counterforce frame (1), a jack (2) and a pile carrier (3); characterized in that: The counterforce frame (1) is a door-shaped counterforce frame, the counterforce frame (1) is fixed on the bearing foundation plate (5) of the foundation (4), and the center of the counterforce frame (1) is aligned with the hole core of the pile hole (51) of the bearing foundation plate (5); an anchor rod static pressure pile (6) is pressed into the foundation (4) along the pile hole (51), the pile frame (3) is placed on the upper end surface of the anchor rod static pressure pile (6), the upper end surface of the pile frame (3) is placed with a continuous locking device (7), and a steel base plate (8) is placed between the lower part of the continuous locking device (7) and the pile frame (3), and the upper part of the continuous locking device (7) abuts against the counterforce frame (1); the jack (2) is placed in the continuous locking device (7), and the continuous locking device (7) can load the pile frame (3) by the pressing of the jack (2), and the continuous locking device (7) can be locked in stages according to the staged loading of the jack (2).

2. The continuously lockable preloading device according to claim 1, characterized in that: The continuous locking device (7) comprises an upper top plate (71), a lower top plate (72), a force holding pipe column (73) and a locking assembly (74), the force holding pipe column (73) is provided with four and is fixed on the four end corners of the lower top plate (72) respectively, one end of the locking assembly (74) is inserted into the force holding pipe column (73), the other end is fixed with the upper top plate (71), the upper top plate (71) abuts against the counterforce frame (1), the lower top plate (72) abuts against the steel base plate (8), and the jack (2) abuts between the upper top plate (71) and the lower top plate (72).

3. The continuously lockable preloading device according to claim 2, characterized in that: The locking assembly (74) comprises a screw rod (74-1) and a nut (74-2), one end of the screw rod (74-1) is inserted into the force holding pipe column (73), the other end of the screw rod (74-1) is fixed on the upper top plate (71), and the nut (74-2) is screwed on the screw rod (74-1) and abuts on the upper end of the force holding pipe column (73).

4. The continuously lockable preloading device of claim 1, wherein: The counterforce frame (1) comprises a frame pier (11), a bottom plate (12) and a cross beam (13), the frame pier (11) is provided with two, the cross beam (13) is fixed on the two symmetrically distributed frame piers (11), the two frame piers (11) are fixed on the bottom plate (12), and the bottom plate (12) is fixed on the bearing foundation plate (5) through the expansion bolt assembly (14).

5. The continuously lockable preloading device of claim 1, wherein: The pile frame (3) comprises an upper bearing plate (31), a lower bearing plate (32) and a steel pipe (33), the steel pipe (33) is fixed between the upper bearing plate (31) and the lower bearing plate (32) by welding, and forms a pile frame (3) with a H-shaped cross section.

6. The continuously lockable preloading device of claim 1, wherein: The anchor rod static pressure pile (6) comprises a pile body (61), an angle iron reinforcing block (62) and a pile top anchor (63), the four corners of the pile top of the pile body (61) are provided with angle iron blocks (64), the angle iron reinforcing block (62) is welded and fixed on the side of the angle iron block (64), and the pile top anchor (63) is welded and fixed on the upper end of the angle iron block (64) and is close to the end corner of the angle iron reinforcing block (62).

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