CN113585363A - Connecting and fixing structure for core-filling steel bars of reaction steel disc and prestressed pipe pile - Google Patents
Connecting and fixing structure for core-filling steel bars of reaction steel disc and prestressed pipe pile Download PDFInfo
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- CN113585363A CN113585363A CN202110791021.XA CN202110791021A CN113585363A CN 113585363 A CN113585363 A CN 113585363A CN 202110791021 A CN202110791021 A CN 202110791021A CN 113585363 A CN113585363 A CN 113585363A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/223—Details of top sections of foundation piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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Abstract
The invention relates to the technical field of prestressed pipe piles, and discloses a connecting and fixing structure of a counterforce steel disc and core-filling steel bars of a prestressed pipe pile, which comprises the counterforce steel disc connected with reverse force application equipment, wherein the prestressed pipe pile is provided with a pile head, and the pile head is provided with a plurality of core-filling steel bars; the counterforce steel disc is arranged among the plurality of core-filling reinforcing steel bars; the periphery of the counter-force steel disc is provided with a plurality of notch grooves, a plurality of core-filling reinforcing steel bars are correspondingly embedded into the notch grooves respectively, the core-filling reinforcing steel bars are provided with connecting sections located above the counter-force steel disc, the connecting sections are fixedly connected with anchors, and the anchor limits the core-filling reinforcing steel bars to be relatively fixed with the counter-force steel disc; after reverse force application equipment is connected with the reaction steel disc, when applying reverse pulling force to the reaction steel disc, realize resistance to plucking static load test, need not to fill core steel bar welding operation, the on-the-spot preparation time is short, can not have welded potential safety hazard, can not lose the reinforcing bar, and is with low costs, can not lead to the atress inhomogeneous or the desoldering because of the welding.
Description
Technical Field
The invention relates to the technical field of prestressed pipe piles, in particular to a connecting and fixing structure of a reaction steel disc and core-filling steel bars of a prestressed pipe pile.
Background
The prestressed pipe pile has been widely used in pile foundation engineering due to its advantages of high construction speed, low comprehensive cost, convenience for field management, etc., and the prestressed pipe pile is also more and more commonly used as a uplift pile. In the traditional uplift static load test of the prestressed pipe pile, the core-filling reinforcing steel bars reserved at the pile head are too short, so that the reinforcing steel bars need to be prolonged by welding on site.
In the prior art, when the prestressed pipe pile needs to be subjected to the pulling-resistant static load test, the welding extension reinforcing steel bars are adopted for conducting the counter force, the field preparation time is long, certain potential safety hazards exist in the welding process, meanwhile, a certain number of reinforcing steel bars need to be consumed, and if the welding operation is improper, the phenomenon that the stress of the welding part is uneven or the welding is detached easily occurs in the test process, so that the pulling-resistant static load test is difficult to perform.
Disclosure of Invention
The invention aims to provide a connecting and fixing structure of a reaction steel disc and core-filling steel bars of a prestressed pipe pile, and aims to solve the problem that extension steel bars need to be welded on the core-filling steel bars when the prestressed pipe pile is subjected to static load tests in the prior art.
The connecting and fixing structure comprises the reaction steel disc connected with reverse force application equipment, wherein the prestressed pipe pile is provided with a pile head, and the pile head is provided with a plurality of upward extending core-filling reinforcing steel bars which are encircled at intervals; the counterforce steel disc is arranged in the middle of the filler steel bars;
the periphery of the reaction steel disc is provided with a plurality of notch grooves which are arranged at intervals along the periphery of the reaction steel disc, and a plurality of core-filling reinforcing steel bars are respectively and correspondingly embedded into the notch grooves; the core-filling steel bars penetrate through the counterforce steel disc to form a connecting section above the counterforce steel disc;
and the connecting section of the core-filling steel bar is fixedly connected with an anchorage device, the anchorage device is abutted against the reaction steel disc downwards, and when the reverse force application equipment pulls the reaction steel disc upwards, the anchorage device limits the core-filling steel bar and the reaction steel disc to be relatively fixed.
Furthermore, the notch grooves are strip-shaped and arranged along the radial extension of the reaction steel disc; the inner end of the notch groove is arranged in a closed mode, and the outer end of the notch groove is provided with a groove opening formed in the periphery of the counter-force steel disc; along the direction of breach groove from outside to inside, the width of the groove opening of breach groove is less than the diameter of filling the core reinforcing bar, fill the core reinforcing bar and pass from bottom to top the breach groove.
Furthermore, the inner end of the notch groove is provided with an inner end side wall which is vertically arranged, and the core-filling steel bar is abutted to the inner end side wall of the notch groove.
Furthermore, a plurality of guide plates are arranged at the bottom of the reaction steel disc and are respectively and correspondingly arranged below the plurality of notch grooves; the guide plate extends downwards to be arranged, the guide plate is provided with a guide wall arranged outwards, the top of the guide wall is just opposite to and communicated with the bottom of the inner end side wall of the notch groove, the guide wall is arranged in an inward arc-shaped bending mode along the direction from top to bottom of the guide wall, and the core filling steel bars are abutted to the guide wall.
Further, a fixing ring is arranged below the counter-force steel disc, and the fixing ring and the counter-force steel disc are arranged in parallel; the bottoms of the guide plates are fixedly connected with the fixing rings respectively.
Furthermore, the anchorage device comprises an anchor cylinder sleeved outside the connecting section of the core-filling steel bar, an anchor hole is formed in the anchor cylinder, and an anchoring gap is formed between the inner side wall of the anchor hole and the periphery of the connecting section of the core-filling steel bar; a plurality of clamping pieces are inserted into the anchoring gap and are arranged at intervals along the circumferential direction of the anchor cylinder, the lower parts of the clamping pieces are inserted into the anchoring gap, and the upper parts of the clamping pieces are exposed above the anchor cylinder;
the clamping piece is provided with a clamping wall facing the core-filling reinforcing steel bar, the clamping wall is vertically arranged, the clamping piece is provided with an anchoring wall facing away from the core-filling reinforcing steel bar, and the anchoring wall inclines towards the core-filling reinforcing steel bar along the direction from top to bottom; the clamping wall of the clamping piece is pressed against the periphery of the connecting section of the core-filling steel bar, and the top edge of the anchor hole is pressed against the anchoring wall of the clamping piece.
Furthermore, be equipped with a plurality of sand grips of interval arrangement from top to bottom on the centre gripping wall, the periphery of the linkage segment of filler core reinforcing bar is equipped with the arch, protruding embedding is between adjacent sand grip.
Furthermore, the bottom of the clamping piece is connected with an inclined deformation plate, and the inclined deformation plate is obliquely arranged away from the core filling steel bar along the direction from top to bottom of the anchor hole; the horizontal width of the inclined deformation plate is equal to the anchoring gap; the inclined deformation plate is arranged in the anchoring gap, the inner end of the inclined deformation plate is abutted to the periphery of the counter-force main rib, and the outer end of the inclined deformation plate is abutted to the inner side wall of the anchor hole.
Furthermore, the middle part of the inclined deformation plate is bent, and a bent part protruding downwards is formed; after the inclined deformation plate is embedded into the anchor hole, the inclined deformation plate bends and deforms downwards by taking the bent part as a bending deformation center.
Furthermore, a plurality of positioning grooves are formed in the top of the counterforce steel disc, the positioning grooves are arranged corresponding to the notch grooves respectively, and the inner ends of the notch grooves are located below the positioning grooves; the lower part of the anchor cylinder is embedded into the positioning groove, and the inner side wall of the positioning groove is abutted to the periphery of the lower part of the anchor cylinder.
Compared with the prior art, the connecting and fixing structure of the counterforce steel disc and the core-filling steel bars of the prestressed pipe pile, provided by the invention, has the advantages that when the prestressed pipe pile needs to be subjected to a pulling-resistant static load test, only the anchorage devices are required to be placed among the core-filling steel bars, the core-filling steel bars are respectively connected with the anchorage devices, the anchorage devices are connected on the connecting sections of the core-filling steel bars, and when the counterforce equipment is connected with the counterforce steel disc and applies a reverse pulling force to the counterforce steel disc, the pulling-resistant static load test can be realized; the core-filling steel bars do not need to be welded, the on-site preparation time is short, potential safety hazards of welding cannot exist, the steel bars cannot be lost, the cost is low, uneven stress or welding failure caused by welding cannot occur, and smooth operation of a pulling static load test of the prestressed pipe pile is guaranteed.
Drawings
FIG. 1 is a schematic view of the connection and fixation structure of a reaction steel disc and a core-filling steel bar of a prestressed pipe pile provided by the invention in cooperation with a reverse force application device;
FIG. 2 is a schematic front view of a reaction steel disc provided by the present invention;
FIG. 3 is a schematic view of the reaction steel disc and the lower sleeve according to the present invention;
FIG. 4 is a cross-sectional view of the core-filling steel bar and the reaction steel plate provided by the present invention;
fig. 5 is a schematic view of the structure of the clip of the present invention cooperating with the core-filling steel bar and the anchor cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-5, preferred embodiments of the present invention are shown.
Reaction steel disc and prestressed pipe pile's core filling reinforcing bar's connection fixed knot constructs, include the reaction steel disc 500 of being connected with reverse construction equipment, prestressed pipe pile 100 has pile head 106, has a plurality of core filling reinforcing bars 101 that extend up and the interval encircles on the pile head 106, and reaction steel disc 500 is placed in the centre of a plurality of core filling reinforcing bars 101.
The periphery of the reaction steel disc 500 is provided with a plurality of notch grooves 503, the notch grooves 503 are arranged at intervals along the periphery of the reaction steel disc 500, the core-filling reinforcing steel bars 101 are correspondingly embedded in the notch grooves 503, and the core-filling reinforcing steel bars 101 penetrate through the reaction steel disc 500 to form a connecting section 1011 above the reaction steel disc 500.
The connecting section 1011 of the core-filling steel bar 101 is fixedly connected with an anchorage device 200, the anchorage device 200 is downwards abutted against the reaction force steel disc 500, and when the reaction force steel disc 500 is upwards pulled by reverse construction equipment, the anchorage device 200 limits the core-filling steel bar 101 and the reaction force steel disc 500 to be relatively fixed.
According to the connecting and fixing structure of the reaction steel disc and the core-filling steel bars of the prestressed pipe pile, when the prestressed pipe pile 100 needs to be subjected to the pulling-resistant static load test, the anchor 200 is placed among the core-filling steel bars 101, the core-filling steel bars 101 are respectively connected with the anchor 200, the anchor 200 is connected to the connecting section 1011 of the core-filling steel bars 101, and after the reverse force application equipment is connected with the reaction steel disc 500, the pulling-resistant static load test can be realized when reverse pulling force is applied to the reaction steel disc 500; the core-filling steel bar 101 does not need to be welded, the on-site preparation time is short, potential safety hazards of welding cannot exist, the steel bar cannot be lost, the cost is low, uneven stress or welding failure caused by welding cannot occur, and the smooth operation of the pulling static load test of the prestressed pipe pile 100 is ensured.
The notch grooves 503 are strip-shaped and arranged along the radial extension of the reaction steel disc 500; the inner end of the notch groove 503 is arranged closed, and the outer end of the notch groove 503 has a groove opening formed on the periphery of the reaction steel plate 500; along the direction from outside to inside of the notch groove 503, the width of the groove opening of the notch groove 503 is smaller than the diameter of the core-filling steel bar 101, and the core-filling steel bar 101 passes through the notch groove 503 from bottom to top.
Thus, when the core-filling steel bar 101 is matched with the reaction steel plate 500, the core-filling steel bar 101 passes through the notch groove 503 from bottom to top, and the core-filling steel bar 101 embedded in the notch groove 503 cannot be separated from the groove opening of the notch groove 503, so that the stable matching between the core-filling steel bar 101 and the reaction steel plate 500 is ensured.
The inner end of the cutaway groove 503 has an inner end sidewall arranged vertically, and the core-filling steel bar 101 abuts against the inner end sidewall of the cutaway groove 503. Therefore, the inner side wall is vertical, the core-filling steel bars 101 are kept vertical after abutting against the inner side wall, and after reverse tension is applied to the reaction steel disc 500 by reverse force application equipment, the reverse steel disc can be vertically pulled with the core-filling steel bars 101, so that accurate detection of the subsequent prestressed pipe pile 100 is guaranteed.
The bottom of the reaction steel disc 500 is provided with a plurality of guide plates 512, and the guide plates 512 are respectively and correspondingly arranged below the notch grooves 503; the guide plate 512 extends downwards, the guide plate 512 is provided with a guide wall which is arranged outwards, the top of the guide wall is in direct alignment communication with the bottom of the inner end side wall of the notch groove 503, the guide wall is arranged in an inward arc-shaped bending manner along the direction from top to bottom of the guide wall, and the core-filling steel bar 101 abuts against the guide wall.
After the reverse steel disc is placed among the core-filling steel bars 101, because the enclosed area among the core-filling steel bars 101 is not large, the core-filling steel bars 101 are inclined outwards when being extruded, and after the core-filling steel bars 101 pass through the notch grooves 503, the part of the core-filling steel bars 101 placed on the reverse steel disc 500 is adjusted to be vertical, at this time, the part of the core-filling steel bars 101 placed in the notch grooves 503 is also vertical, and the part of the core-filling steel bars 101 located below the reverse steel disc 500 is inclined, so that the part of the core-filling steel bars 101 located below the reverse steel disc 500 can be bent and guided through the guide wall of the guide plate 512, and smooth transition of the parts of the core-filling steel bars 101 placed above and below the reverse steel disc 500 is realized.
A fixing ring is arranged below the reaction steel disc 500, and the fixing ring and the reaction steel disc 500 are arranged in parallel; the bottoms of the guide plates 512 are respectively fixedly connected with the fixing rings. The bottoms of the guide plates 512 are connected into a whole through the fixing ring, so that the stability of the guide plates 512 is maintained, and the core-filling reinforcing steel bars 101 cannot be pressed and deformed.
The anchorage device 200 comprises an anchor cylinder 201 sleeved outside the connecting section 1011 of the core-filling steel bar 101, an anchor hole is formed in the anchor cylinder 201, and an anchor clearance 204 is formed between the inner side wall of the anchor hole and the periphery of the connecting section 1011 of the core-filling steel bar 101; a plurality of clamping pieces 202 are inserted into the anchoring gap 204, the plurality of clamping pieces 202 are arranged at intervals along the circumference of the anchor barrel 201, the lower parts of the clamping pieces 202 are inserted into the anchoring gap 204, and the upper parts of the clamping pieces 202 are exposed above the anchor barrel 201.
The clip 202 is provided with a clamping wall facing the core-filling steel bar 101, the clamping wall is vertically arranged, the clip 202 is provided with an anchoring wall facing away from the core-filling steel bar 101, and the anchoring wall inclines towards the core-filling steel bar 101 along the direction from top to bottom; the clamping wall of the clamping piece 202 is pressed against the periphery of the connecting section 1011 of the core-filling steel bar 101, and the top edge of the anchor hole is pressed against the anchoring wall of the clamping piece 202.
The clamping wall is provided with a plurality of convex strips 205 which are arranged at intervals up and down; the clamping wall of the clamping piece 202 is pressed against the periphery of the connecting section 1011 of the core-filling steel bar 101, the periphery of the connecting section 1011 of the core-filling steel bar 101 is provided with a protrusion, the protrusion is embedded between the adjacent convex strips 205, and the top edge of the anchor hole is pressed against the anchoring wall of the clamping piece 202.
After the anchor cylinder 201 is sleeved on the periphery of the connecting section 1011, the bottom of the anchor cylinder 201 abuts against the reaction steel disc 500, at the moment, the lower parts of the clamping pieces 202 are embedded into the anchoring gap 204 from top to bottom, along with downward embedding of the clamping pieces 202, as the anchoring walls of the clamping pieces 202 are inclined, under the extrusion of the top edge of the anchor hole, the clamping walls of the clamping pieces 202 are clamped on the periphery of the connecting section 1011 of the core-filled steel bar 101 more and more tightly, and as the periphery of the core-filled steel bar 101 is provided with the protrusions, the protrusions can be embedded between the adjacent convex strips 205, so that the core-filled steel bar 101 can be better clamped by the anchorage device 200.
The bottom of the clamping piece 202 is connected with an inclined deformation plate 203, and the inclined deformation plate 203 is obliquely arranged away from the counter-force main rib 300 along the direction from top to bottom of the anchor hole; the horizontal width of the inclined deformation plate 203 is equal to the anchoring gap 204; the inclined deformation plate 203 is arranged in the anchoring gap 204, the inner end of the inclined deformation plate 203 abuts against the periphery of the reaction main rib 300, and the outer end of the inclined deformation plate 203 abuts against the inner side wall of the anchor hole.
Like this, along with the continuous embedding downwards of clamping piece 202, the centre gripping wall of clamping piece 202 can grasp the steel bar 101 of banketing, and simultaneously, slope deformation board 203 is in the anchor eye, through the extrusion between the inside wall of the periphery of steel bar 101 of banketing and anchor eye, realizes the secondary centre gripping to steel bar 101 of banketing for ground tackle 200 centre gripping steel bar 101 that can be better, also can avoid because the factor of external vibrations leads to clamping piece 202 to break away from the phenomenon that comes out from anchor clearance 204.
The middle part of the inclined deformation plate 203 is bent, and a bent part protruding downwards is formed; after the slope deformation board 203 is embedded in the anchor eye, the inner of slope deformation board 203 receives the extrusion of core-filling reinforcing bar 101, and the outer end of slope deformation board 203 receives the extrusion of the inside wall of anchor eye, and slope deformation board 203 uses the department of buckling as the bending deformation center, bending deformation downwards for the horizontal width increase of slope deformation piece, but the size of anchor clearance 204 does not change, thereby, the slope deformation piece then warp extrusion core-filling reinforcing bar 101, and the centre gripping is more firm.
The top of the counterforce steel disc 500 is provided with a plurality of positioning grooves 513, the plurality of positioning grooves 513 are respectively arranged corresponding to the plurality of notch grooves 503, and the inner ends of the notch grooves 503 are positioned below the positioning grooves 513; the lower part of the anchor drum 201 is embedded in the positioning groove 513, and the inner side wall of the positioning groove 513 abuts against the outer periphery of the lower part of the anchor drum 201. Thus, when the anchor 200 is placed on the reaction steel plate 500, the lower portion of the anchor barrel 201 is fitted into the positioning groove 513, so that the anchor barrel 201 is prevented from being dislocated when inserted into the anchoring gap 204 by the clip 202, and the portion of the filler rod 101 above the reaction steel plate 500 can be maintained in a vertical arrangement.
When the prestressed pipe pile 100 needs to be subjected to a pulling-resistant static load test, the reverse force application equipment comprises a main beam 400, a jack 104 and a reaction main rib 300, wherein a vertical hole 504 is formed in the middle of a reaction steel disc 500, and the reaction main rib 300 penetrates through the vertical hole 504 and is relatively fixed with the reaction steel disc 500; the jacks 104 are provided on the main beams 400.
The main beam 400 is horizontally arranged and positioned above the core-filling reinforcing steel bars 101, the main counter-force bar 300 penetrates through the main beam 400 and is provided with an upward extending section positioned above the main beam 400, and the jack 104 is connected with the upward extending section of the main counter-force bar 300; the top of the pile head 106 is provided with a displacement sensor 600, the jack 104 presses the main beam 400 downwards, and the displacement sensor 600 monitors the settlement amount of the pile head 106.
The bottom of the reaction steel disc 500 is connected with a lower sleeve 506; along the direction from top to bottom, the main reaction bar 300 sequentially passes through the vertical hole 504 and the lower sleeve 506, and the main reaction bar 300 and the reaction steel disc 500 are kept relatively fixed;
the upper end of the lower sleeve 506 is fixedly connected with the reaction steel disc 500, a vertically arranged lower threaded hole is formed in the lower sleeve 506, the lower threaded hole is aligned and communicated with the vertical hole 504, and external threads are formed in the periphery of the reaction main rib 300; in step 5), the main reaction force rib 300 is screwed with the lower sleeve 506, and the bottom of the main reaction force rib 300 passes through the bottom of the lower sleeve 506 with a lower extension extending below the lower sleeve 506.
Through threaded connection, be convenient for the main muscle 300 of reaction and being connected of lower sleeve 506, and the periphery of whole main muscle 300 of reaction all is equipped with the external screw thread, and the bottom of main muscle 300 of reaction has the lower extension of arranging lower sleeve 506 below in, avoids the direct butt of reaction steel disc 500 at the top of pile head 106.
Because the reaction steel disc 500 is arranged in the middle of the multiple core-filling steel bars 101, the closer to the top of the pile head 106, the larger the outward expansion deformation of the core-filling steel bars 101 is, and the reaction steel disc 500 is arranged upwards, so that the part of the core-filling steel bars 101 embedded in the notch grooves 503 is vertically arranged, and the subsequent detection precision is ensured.
After the reaction steel plate 500 is placed in the middle of the multiple filler rods 101, the lower sleeve 506 abuts against the top of the pile head 106. The lower sleeve 506 may act as a temporary support to maintain the horizontal arrangement of the reaction steel plate 500.
The reaction force main bar 300 is driven to downwards pass through the lower sleeve 506 by rotating the reaction force main bar 300; after the bottom of the main reaction rib 300 is rotated to the bottom of the lower sleeve 506, the bottom of the main reaction rib 300 abuts against the top of the pile head 106, the main reaction rib 300 is rotated downward continuously, and the reaction steel disc 500 moves upward to press against the anchor 200.
The anchorage device 200 presses the reaction steel disc 500 from top to bottom, drives the reaction steel disc 500 to move upwards by screwing the reaction main rib 300 downwards, thereby pressing the reaction steel disc 500 from bottom to top, and keeps the reaction steel disc 500, the reaction main rib 300 and the core-filling reinforcing steel bar 101 stably and relatively fixed by the action of up-and-down clamping.
A reinforcing cylinder 505 is sleeved on the periphery of the lower sleeve 506, the upper end of the reinforcing cylinder 505 is fixedly connected with the reaction steel disc 500, and the lower end of the reinforcing cylinder 505 is fixedly connected with the lower end of the lower sleeve 506; strengthen a protruding butt ring 507 that is equipped with a plurality of upper and lower interval arrangements of the inside wall of section of thick bamboo 505, butt ring 507 supports and presses the periphery at lower sleeve 506, like this, strengthens a section of thick bamboo 505 through setting up, can make the cooperation between lower sleeve 506 and the main muscle 300 of counter force more firm, avoids appearing crooked phenomenon.
An embedded sleeve is embedded in the center of the top of the pile head 106, an embedded threaded hole with a closed bottom and an open top is formed in the embedded sleeve, and the threaded hole is vertically arranged; the top of the embedded threaded hole is exposed at the top of the pile body; after the lower extension of the main counterforce rib 300 abuts against the top of the pile body, the main counterforce rib 300 continues to rotate downwards, and the lower extension of the main counterforce rib 300 is screwed into the embedded sleeve until the bottom of the lower extension abuts against the bottom of the embedded sleeve.
In this way, through the connection between the main reaction rib 300 and the embedding sleeve, the main reaction rib 300 can be kept in the experiment process, the coaxial arrangement with the prestressed pipe pile 100 can be always kept, the deviation or the inclination phenomenon can not occur, moreover, even if the reaction steel disc 500 is in the inclined state in the installation process due to the deformation phenomenon of the core filling steel bar 101, the reaction steel disc 500 can be adjusted to be in the horizontal state through the screw thread precession connection of the main reaction rib 300 and the embedding sleeve, in addition, the main reaction rib 300 is connected with the prestressed pipe pile 100 into a whole through the reaction steel disc 500 and the core filling steel bar 101, and the main reaction rib 300 is further connected with the prestressed pipe pile 100 into a whole through the connection with the embedding sleeve.
A downward pressing steel plate 1041 is sleeved on the upper extending section of the counter force main rib 300, and the downward pressing steel plate 1041 abuts against the jack 104 downwards; the upper extending section of the main counterforce rib 300 is sleeved with a lower pressing cylinder 1042, the lower pressing cylinder 1042 is in threaded connection with the main counterforce rib 300 and presses a lower pressing steel plate 1041 downwards, so that the main counterforce rib 300 and the jack 104 are relatively fixed. In this way, the lower pressing cylinder 1042 presses the lower pressing steel plate 1041 downwards, so that the jack 104 is stably placed on the main beam 400.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The connecting and fixing structure of the counterforce steel disc and the core filling steel bars of the prestressed tubular pile is characterized by comprising the counterforce steel disc connected with reverse force application equipment, wherein the prestressed tubular pile is provided with a pile head, and the pile head is provided with a plurality of core filling steel bars which extend upwards and are surrounded at intervals; the counterforce steel disc is arranged in the middle of the filler steel bars;
the periphery of the reaction steel disc is provided with a plurality of notch grooves which are arranged at intervals along the periphery of the reaction steel disc, and a plurality of core-filling reinforcing steel bars are respectively and correspondingly embedded into the notch grooves; the core-filling steel bars penetrate through the counterforce steel disc to form a connecting section above the counterforce steel disc;
and the connecting section of the core-filling steel bar is fixedly connected with an anchorage device, the anchorage device is abutted against the reaction steel disc downwards, and when the reverse force application equipment pulls the reaction steel disc upwards, the anchorage device limits the core-filling steel bar and the reaction steel disc to be relatively fixed.
2. The connecting and fixing structure of the reaction steel disc and the core-filling steel bars of the prestressed pipe pile according to claim 1, wherein the notch groove is strip-shaped and arranged along the radial extension of the reaction steel disc; the inner end of the notch groove is arranged in a closed mode, and the outer end of the notch groove is provided with a groove opening formed in the periphery of the counter-force steel disc; along the direction of breach groove from outside to inside, the width of the groove opening of breach groove is less than the diameter of filling the core reinforcing bar, fill the core reinforcing bar and pass from bottom to top the breach groove.
3. The connecting and fixing structure of the counterforce steel disc and the core-filling steel bar of the prestressed pipe pile according to claim 2, wherein the inner end of the notch groove has an inner end side wall arranged vertically, and the core-filling steel bar abuts against the inner end side wall of the notch groove.
4. The connecting and fixing structure of the reaction steel disc and the core-filling steel bars of the prestressed pipe pile according to claim 3, wherein a plurality of guide plates are arranged at the bottom of the reaction steel disc, and the plurality of guide plates are respectively and correspondingly arranged below the plurality of notch grooves; the guide plate extends downwards to be arranged, the guide plate is provided with a guide wall arranged outwards, the top of the guide wall is just opposite to and communicated with the bottom of the inner end side wall of the notch groove, the guide wall is arranged in an inward arc-shaped bending mode along the direction from top to bottom of the guide wall, and the core filling steel bars are abutted to the guide wall.
5. The connecting and fixing structure of the reaction steel disc and the core-filling steel bars of the prestressed pipe pile according to any one of claims 1 to 4, wherein a fixing ring is arranged below the reaction steel disc, and the fixing ring and the reaction steel disc are arranged in parallel; the bottoms of the guide plates are fixedly connected with the fixing rings respectively.
6. The connecting and fixing structure of the counterforce steel disc and the core-filling steel bar of the prestressed pipe pile according to any one of claims 1 to 4, wherein the anchor device comprises an anchor cylinder sleeved outside the connecting section of the core-filling steel bar, an anchor hole is arranged in the anchor cylinder, and an anchoring gap is formed between the inner side wall of the anchor hole and the periphery of the connecting section of the core-filling steel bar; a plurality of clamping pieces are inserted into the anchoring gap and are arranged at intervals along the circumferential direction of the anchor cylinder, the lower parts of the clamping pieces are inserted into the anchoring gap, and the upper parts of the clamping pieces are exposed above the anchor cylinder;
the clamping piece is provided with a clamping wall facing the core-filling reinforcing steel bar, the clamping wall is vertically arranged, the clamping piece is provided with an anchoring wall facing away from the core-filling reinforcing steel bar, and the anchoring wall inclines towards the core-filling reinforcing steel bar along the direction from top to bottom; the clamping wall of the clamping piece is pressed against the periphery of the connecting section of the core-filling steel bar, and the top edge of the anchor hole is pressed against the anchoring wall of the clamping piece.
7. The connecting and fixing structure of the reaction steel disc and the core-filling steel bars of the prestressed tubular pile according to claim 6, wherein the holding wall is provided with a plurality of raised bars arranged at intervals up and down, and the periphery of the connecting section of the core-filling steel bars is provided with protrusions embedded between the adjacent raised bars.
8. The connecting and fixing structure of the counterforce steel disc and the core-filling steel bars of the prestressed pipe pile according to claim 6, wherein the bottom of the clamping piece is connected with an inclined deformation plate, and the inclined deformation plate is obliquely arranged away from the core-filling steel bars along the direction from top to bottom of the anchor hole; the horizontal width of the inclined deformation plate is equal to the anchoring gap; the inclined deformation plate is arranged in the anchoring gap, the inner end of the inclined deformation plate is abutted to the periphery of the counter-force main rib, and the outer end of the inclined deformation plate is abutted to the inner side wall of the anchor hole.
9. The connecting and fixing structure of the counterforce steel disc and the core-filling steel bar of the prestressed pipe pile as claimed in claim 8, wherein the middle part of the inclined deformation plate is bent to form a bent part protruding downwards; after the inclined deformation plate is embedded into the anchor hole, the inclined deformation plate bends and deforms downwards by taking the bent part as a bending deformation center.
10. The connecting and fixing structure of the reaction steel disc and the core-filling steel bars of the prestressed pipe pile according to any one of claims 1 to 4, wherein a plurality of positioning grooves are formed in the top of the reaction steel disc, the plurality of positioning grooves are respectively arranged corresponding to the plurality of notch grooves, and the inner ends of the notch grooves are located below the positioning grooves; the lower part of the anchor cylinder is embedded into the positioning groove, and the inner side wall of the positioning groove is abutted to the periphery of the lower part of the anchor cylinder.
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