CN112049106A - Construction process of steel pipe pile in medium-long period wave sea area - Google Patents
Construction process of steel pipe pile in medium-long period wave sea area Download PDFInfo
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- CN112049106A CN112049106A CN202010732609.3A CN202010732609A CN112049106A CN 112049106 A CN112049106 A CN 112049106A CN 202010732609 A CN202010732609 A CN 202010732609A CN 112049106 A CN112049106 A CN 112049106A
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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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/14—Components for drivers inasmuch as not specially for a specific driver construction
- E02D7/16—Scaffolds or supports for drivers
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- General Engineering & Computer Science (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a construction process of a steel pipe pile in a medium-long period wave sea area, which comprises the following steps: s1, piling the steel pipe pile group by adopting conventional piling equipment; s2, assembling a piling platform on the steel pipe pile group; s3, finishing the construction of the G-A row of steel pipe piles in sequence; s4: measuring the pile top elevation and horizontal deviation of the newly constructed steel pipe pile, adjusting the height of a pushing device to be installed through a lifting adjusting device, pushing out a telescopic platform at the front end of an operation walkway, and installing a pushing device corresponding to the newly constructed steel pipe pile; s5: fixing the crawler crane and the operation platform, releasing the locking device, withdrawing the telescopic platform and arranging a connecting rod; s6: pushing the platform forwards; s7: and repeating the steps S3-S6 until the construction of each row of steel pipe piles is completed. The invention has the beneficial effect of realizing the moving stability of the pile driving platform on the pile top in the construction process of the steel pipe pile.
Description
Technical Field
The invention relates to the technical field of port construction. More specifically, the invention relates to a construction process of a steel pipe pile in a medium-long period wave sea area.
Background
The stake machine of high pile pier adopts the structural style of steel-pipe pile, and it is all great to need overcome the wave cycle (being greater than 8s) and the wave speed of well long period ripples sea area steel-pipe pile construction, has extremely strong penetrability and energy problem, receives the caisson influence simultaneously, has back wave and incident wave stack effect, and the problem that the construction equipment location degree of difficulty is high. In order to eliminate the influence of waves on the displacement and the positioning of the construction platform, the fulcrum of the platform displacement and the piling must be separated from the water surface, the best supporting point is the constructed steel pipe pile, and the fulcrum is transferred to the pile top. Furthermore, the length of the steel pipe pile reaches 48m, the maximum weight reaches about 40t, the hoisting and feeding difficulty is high, and the stability of a single pile is poor due to the influence of waves and water flow force, so that the single pile can bear weak horizontal force. The key problem is to realize the moving stability of the platform on the pile top in the construction process of the steel pipe pile.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a construction process of the steel pipe pile in the medium-long period wave sea area, which realizes the movement stability of the pile driving platform on the pile top in the construction process of the steel pipe pile.
To achieve these objects and other advantages in accordance with the present invention, there is provided a medium-long period wave steel pipe pile construction process including the steps of:
s1, piling steel pipe pile groups by using conventional piling equipment, wherein the steel pipe pile groups are arranged in a matrix and comprise 7 transverse rows of steel pipe piles with the labels of 1-7 rows along the moving direction of the platform and 7 longitudinal rows of steel pipe piles with the labels of A-G rows along the direction close to the caisson;
s2, assembling the piling platform on the steel pipe pile group, which comprises the following steps:
s20, installing a pushing device, wherein the pushing device comprises 9 pushing units respectively arranged at the pile tops of the steel pipe piles at the intersection points of 3 rows, 5 rows, 7 rows, B rows, D rows and F rows, each pushing unit comprises a pile cap, a lifting adjusting device, a positioning seat, a fixing device, a three-way jack and a locking device, the pile cap comprises a cap body and a cap top, the cap body is provided with a positioning groove matched with the pile top of the steel pipe pile, a rubber ring is arranged between the cap body and the corresponding steel pipe pile, a plurality of pressing seams are arranged at intervals along the circumferential direction at the lower part of the cap body so as to divide the lower part of the cap body into a plurality of pressing blocks, four bottom threaded holes are arranged at the top end of the cap body in a crossed manner along the circumferential direction, top threaded holes matched with the bottom threaded holes are arranged at the bottom end of the positioning seat, a pair of threaded holes is formed by the bottom threaded holes and the top threaded holes which are arranged oppositely up and down, the lifting adjusting device, the screw rod comprises a bottom adjusting part matched with a corresponding bottom threaded hole in a threaded manner, a top adjusting part matched with a corresponding top threaded hole in a threaded manner, and an operating part positioned between the bottom adjusting part and the top adjusting part, wherein the threads of the bottom adjusting part, the top adjusting part and the corresponding threaded hole are set into threads which enable the cap top and the positioning seat to move relatively, two synchronous gears are coaxially arranged on each operating part at an upper and lower interval, a synchronous belt is arranged between the two synchronous gears between any two adjacent operating parts along the circumferential direction, a supporting plate is rotationally arranged on the four synchronous gears positioned below the supporting plate, a turbine is arranged between the upper synchronous gear and the supporting plate at one operating part, a rotating motor is arranged on the supporting plate, an output shaft of the motor is fixedly connected with a worm meshed with the turbine, an accommodating groove is arranged at the top end of the positioning seat, the three-way jack is arranged in the accommodating groove, the fixing device comprises a pair of pipe hoop units which are butted to form a pipe hoop, the longitudinal section of each pipe hoop unit is in a U shape with an opening facing one side, sealing strips are arranged on the end faces of the U-shaped opening ends of the pair of pipe hoop units, the lower end of each pipe hoop unit is hooped on the periphery of the cap body pressing block after the pipe hoop units are butted and fixed, and the upper end of each pipe hoop unit is hooped on the periphery of the positioning seat, so that a sealing structure is formed in a space surrounded by the pipe hoops;
the adjacent fixing devices are fixed through connecting rods;
s21, mounting a bearing platform according to the pushing device;
s22, an operation walkway is installed below the bearing platform, and a telescopic platform is arranged at the front end of the operation walkway;
s23, installing the operation platform according to the bearing platform;
s24, installing a platform crawler crane according to the operation platform;
s25, installing a large-row guide frame according to the bearing platform;
s3, positioning a large-row guide frame, and lifting the steel pipe piles by using a platform crawler crane to sequentially complete the construction of the steel pipe piles in the G-A row;
s4: measuring the pile top elevation and horizontal deviation of the newly constructed steel pipe pile, adjusting the height of a pushing device to be installed through a lifting adjusting device, pushing out a telescopic platform at the front end of an operation walkway, and installing a pushing device corresponding to the newly constructed steel pipe pile;
s5: fixing the crawler crane and the operation platform, releasing the locking device, withdrawing the telescopic platform and arranging a connecting rod;
s6: pushing the platform forwards;
s7: and repeating the steps S3-S6 until the construction of each row of steel pipe piles is completed.
Preferably, step S21 is specifically: firstly installing 2 main beams positioned in the D row and the F row and cross beams correspondingly positioned above the 3 row and the 5 row to form a frame, then installing main beams positioned in the B row and cross beams correspondingly positioned above the 3 row and the 5 row, and finally installing the rest beam systems, wherein the main beams are box-shaped welding pieces, and the cross beams are I-shaped welding pieces.
Preferably, the operation walkway comprises three walkway units which are arranged in one-to-one correspondence with the 3 main beams, and the telescopic platform is arranged at the front end of each walkway unit.
Preferably, the work platform comprises a panel and a distribution beam welded with the panel to form a whole;
and step S23, after the operation platform is installed, the platform is subjected to no-load test operation.
Preferably, the big-row guide frame comprises a track arranged in front of the operation platform and extending transversely, a keel arranged on the track in a sliding manner, and a hydraulic system for controlling transverse movement of the keel, wherein the completion of one-time steel pipe pile construction specifically comprises: and feeding the steel pipe pile into the keel, closing the keel, performing self-weight pile sinking, and hoisting the large pile hammer to the pile top of the steel pipe pile through the platform crawler crane after the self-weight pile sinking is finished.
Preferably, after the crawler attachment platform is installed in step S24, the method further includes:
carrying out a walking experiment in which the walking speed is adjusted to be lowest on the platform along the direction of the cross beam;
walking the platform crawler crane to a position of a cross beam between the row D and the row F, assembling small bent guide frames on two sides, wherein the keel openings of the two small bent guide frames respectively correspond to the intersection points of the row 4 and the row A and the row G;
and carrying out no-load test operation on the platform.
Preferably, two small rows of guide frames are used for feeding piles from two sides of the operation platform and driving the steel pipe piles.
The invention at least comprises the following beneficial effects:
the pile top supporting walking type pushing process is adopted, the bearing platform is integrally translated in place by utilizing the pushing device, the pile top pushing positioning device is continuously switched to the front-end constructed steel pipe pile through the crawler crane on the operation platform to realize continuous displacement of the platform, the horizontal force of the pile top in the whole pushing process is small, the position and the posture of the platform are adjusted at any time by combining the pushing process with a three-way jack, the pushing speed is high, the precision is high, and the influence of the external environment is avoided;
the pile cap of the pushing device comprises a pile body and a pile top, the pile body is fixedly connected with the pile top of the steel pipe pile in a matched mode, the fixed connection comprises a pressing block matched with the fixation of the pipe hoop unit and the fixation of the pile body, and the fixation stability is improved;
the pile top is matched with the positioning seat to provide a space for arranging the lifting adjusting device, the screw rods comprise a bottom adjusting part, a top adjusting part and an operating part, synchronous regulation and control of the four screw rods are realized and then the four screw rods are fixed by arranging a synchronous gear, a synchronous belt, a supporting plate and a worm gear in the operating part, and the two-way fixation in the vertical direction is further realized by matching with the pipe hoop unit;
the setting of ferrule unit provides confined operating space for lift adjusting device, avoids the environmental erosion, improves the life of device, and simultaneously, the ferrule unit is fixed with steel-pipe pile and thrustor, realizes in step when fixing the ferrule unit through the connecting rod that steel-pipe pile is within a definite time, thrustor is within a definite time fixed, realizes the mobility stability of platform at the pile top in the steel-pipe pile work progress.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic distribution diagram of a steel pipe pile group according to one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the pushing device according to one embodiment of the present invention;
fig. 3 is a schematic structural diagram of a lifting adjusting device according to one embodiment of the present invention;
fig. 4 is a schematic structural diagram of the pile cap according to one embodiment of the present invention;
fig. 5 is a schematic structural diagram of a hoop unit according to one embodiment of the present invention.
The reference numerals are specifically: a caisson 10; a steel pipe pile 11; a pushing device 2; a pile cap 3; a cap body 30; a positioning groove 300; compressing the seam 301; a compression block 302; a crown 31; a rubber ring 32; a bottom threaded hole 33; a screw 40; a bottom adjustment part 400; a top adjustment portion 401; an operation section 402; a synchronizing gear 41; a timing belt 42; a support plate 43; a turbine 44; a worm 45; a positioning seat 5; a top threaded hole 50; a receiving groove 51; a fixing device 6; a pipe clamp unit 60; a connecting post 61; a three-way jack 7; a locking device 8; a connecting rod 90; a main beam 91.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
< example 1>
The construction process of the steel pipe pile in the medium-long period wave sea area, as shown in figures 2-5, comprises the following steps:
s1, piling steel pipe pile groups by using conventional piling equipment (400t self-elevating platform), wherein the steel pipe pile groups are arranged in a matrix form and comprise 7 transverse rows of steel pipe piles 11 with the labels of 1-7 rows along the moving direction of the platform and 7 longitudinal rows of steel pipe piles 11 with the labels of A-G rows along the direction close to a caisson 10, the steel pipe pile groups are positioned on one side of the caisson 10, the caisson 10 is provided with a caisson 10 crawler crane matched with the caisson 10, and the caisson also comprises a square barge;
s2, hoisting each component of the piling platform to a caisson 10 or a barge, assembling the piling platform on the steel pipe pile group, and specifically comprising:
s20, installing a pushing device 2, wherein the pushing device 2 comprises 9 pushing units respectively arranged at the pile tops of steel pipe piles 11 at the intersection points of 3 rows, 5 rows, 7 rows and B rows, D rows and F rows, each pushing unit comprises a pile cap 3, a lifting adjusting device, a positioning seat 5, a fixing device 6, a three-way jack 7 and a locking device 8, the pile cap 3 is in an inverted cylinder shape, the pile cap 3 comprises a cap body 30 provided with a positioning groove 300 matched with the pile top of the steel pipe pile 11 and a cap top 31 arranged at the top end of the cap body 30, a rubber ring 32 is arranged between the cap body 30 and the corresponding steel pipe pile 11, a plurality of compression seams 301 are circumferentially arranged at intervals at the lower part of the cap body 30 so as to divide the lower part of the cap body 30 into a plurality of compression blocks 302, the compression seams 301 provide a moving space for the compression blocks 302 to be compressed to the center, and the height of the compression blocks 302 accounts for 3/4 of the height of the cap body 30, 2/3 of the partial cap body 30 above the pressing seam 301 is at least covered by the rubber ring 32 along the height direction, 2/3 of the partial cap body 30 below the pressing seam 301 is covered by the rubber ring 32, four bottom threaded holes 33 are arranged on the top end of the cap top 31 in a crossed manner along the circumferential direction, top threaded holes 50 matched with the bottom threaded holes 33 are arranged at the bottom end of the positioning seat 5, the bottom threaded holes 33 and the top threaded holes 50 which are arranged oppositely from top to bottom form a pair of threaded holes, the lifting adjusting device comprises screw rods 40 respectively corresponding to each pair of threaded holes, each screw rod 40 comprises a bottom adjusting part 400 matched with the corresponding bottom threaded hole 33 in a threaded manner, a top adjusting part 401 matched with the corresponding top threaded hole 50, and an operating part 402 positioned between the bottom adjusting part 400 and the top adjusting part 401, the threads of the bottom adjusting part 400 and the top adjusting part 401 and the corresponding threaded holes are set in a manner that the screw rods 40 rotate to enable the cap top 31 and the positioning seat, specifically, when the screw 40 rotates clockwise, the positioning seat 5 moves downward relative to the screw 40, the screw 40 moves downward relative to the pile cap 3, i.e. the distance between the positioning seat 5 and the pile cap 3 is regulated to decrease, or vice versa, two synchronizing gears 41 (8 synchronizing gears 41 in total, four coplanar gears at the top, and four coplanar gears at the bottom, i.e. two layers above and below) are coaxially arranged on each operating part 402 at intervals from top to bottom, a synchronous belt 42 is arranged between two synchronizing gears 41 between any two adjacent operating parts 402 along the circumferential direction, a supporting plate 43 is rotatably arranged on the four synchronizing gears 41 at the bottom, one operating part 402 is provided with a turbine 44 between the synchronizing gear 41 above the operating part and the supporting plate 43, the supporting plate 43 is provided with a rotating motor, and the output shaft of the motor is fixedly connected with a worm 45 meshed with the turbine 44, the worm 45 rotates to drive the worm wheel 44 to rotate, the worm wheel 44 rotates to drive the corresponding screw rod 40 to move, the screw rod 40 rotates to drive the other screw rods 40 to rotate, and the height of the positioning seat 5 relative to the pile cap 3 is adjusted; the top end of the positioning seat 5 is provided with an accommodating groove 51, the three-way jack 7 is arranged in the accommodating groove 51, the locking device 8 is arranged above the positioning seat 5, and the fixing device 6 comprises a lower pipe hoop hooped on the periphery of the pressing block 302 of the cap body 30, an upper pipe hoop hooped on the periphery of the positioning seat 5, and a fixing rod fixedly connected between the upper pipe hoop and the lower pipe hoop;
a pair of fixing rods between adjacent fixing devices 6 are fixed through a connecting rod 90;
s21, installing a bearing platform according to the pushing device 2, and locking a lower flange of a longitudinal beam by using a locking device 8 when the main beam 91 is installed on the pile top of the pushing device 2 to prevent the bearing platform from moving in a staggered manner;
s22, installing an operation walkway below the bearing platform, wherein a telescopic platform is arranged at the front end of the operation walkway, and the telescopic platform is arranged to enable an operator to provide support according to the telescopic platform and install the pushing device 2 at a corresponding position, each walkway unit can be fed into the bottom of the main beam 91 and then placed on the connecting rod 90 before installation, and then accurately positioned and connected with the bearing platform;
s23, installing the operation platform according to the bearing platform, paying attention to installation accuracy when the operation platform is laid, avoiding interference with a bolt joint, welding the operation platform with the bearing platform in the laying process, and welding the operation platform and the bearing platform into a whole to ensure that the operation platform and the bearing platform are not dislocated;
s24, installing the platform crawler crane according to the operation platform, which is specifically as follows: assembling the platform crawler crane at the position of the cross beam, marking the operation platform at the position of the cross beam and laying a steel plate before assembling, and additionally arranging crawler crane limiting structures at the positions of two sides of the cross beam;
s25, installing a large-row guide frame according to the bearing platform;
s3, finishing the construction of the G-A row of steel pipe piles 11 in sequence, wherein the concrete step of finishing the construction of the steel pipe piles 11 for one time is as follows: positioning a large row of guide frames, lifting the steel pipe piles 11 by using the platform crawler crane to feed the keel, closing the keel, performing self-weight pile sinking, and lifting large pile hammers to the pile tops of the steel pipe piles 11 by using the platform crawler crane to perform driving after the self-weight pile sinking is finished;
s4: measuring the pile top elevation and horizontal deviation of the newly constructed steel pipe pile 11, adjusting the height of a pushing device 2 to be installed through a lifting adjusting device, pushing out a telescopic platform at the front end of an operation walkway, and installing the pushing device 2 corresponding to the newly constructed steel pipe pile 11;
s5: fixing the crawler crane with the operation platform, releasing the locking device 8, retracting the telescopic platform, and arranging a connecting rod 90;
s6: pushing the platform forwards;
s7: and repeating the steps S3-S6 until the construction of each row of steel pipe piles 11 is completed.
< example 2>
The construction process of the steel pipe pile in the medium-long period wave sea area, as shown in figures 1-5, comprises the following steps:
s1, piling steel pipe pile groups by using conventional piling equipment (400t self-elevating platform), wherein the steel pipe pile groups are arranged in a matrix manner as shown in figure 1, the steel pipe pile groups comprise 7 transverse rows of steel pipe piles 11 with the labels of 1-7 rows along the moving direction of the platform and 7 longitudinal rows of steel pipe piles 11 with the labels of A-G rows along the direction close to a caisson 10, the steel pipe pile groups are positioned on one side of the caisson 10, the caisson 10 is provided with a caisson 10 crawler crane matched with the caisson 10, and the caisson 10 also comprises a square barge;
s2, hoisting each component of the piling platform to a caisson 10 or a barge, assembling the piling platform on the steel pipe pile group, and specifically comprising:
s20, installing a pushing device 2, wherein the pushing device 2 comprises 9 pushing units respectively arranged at 11 pile tops of the steel pipe piles at the intersection points of 3 rows, 5 rows, 7 rows, B rows, D rows and F rows, and each pushing unit comprises:
a pile cap 3 in an inverted cylindrical shape, including a cap body 30 having a positioning groove 300 that is fitted to the pile top of the steel pipe pile 11, and a cap top 31 provided at the top end of the cap body 30, wherein a rubber ring 32 is provided between the cap body 30 and the corresponding steel pipe pile 11, a plurality of press seams 301 are provided at intervals in the circumferential direction at the lower part of the cap body 30 to divide the lower part of the cap body 30 into a plurality of press blocks 302, the press seams 301 provide a moving space for the press blocks 302 to shrink toward the center, the height of the press blocks 302 accounts for 2/3 of the height of the cap body 30, the rubber ring 32 covers at least 2/3 of a part of the cap body 30 above the press seams 301 in the height direction, covers 2/3 of a part of the cap body 30 below the press seams 301, and four bottom threaded holes 33 are provided at the top end of the cap top 31 in a crisscross manner in the circumferential direction;
the positioning seat 5 is positioned above the pile cap 3, a top threaded hole 50 matched with the bottom threaded hole 33 is formed in the bottom end of the positioning seat 5, and the bottom threaded hole 33 and the top threaded hole 50 which are arranged in an up-down opposite mode form a pair of threaded holes;
the lifting adjusting device is arranged between the positioning seat 5 and the pile cap 3 and used for adjusting the height of the positioning seat 5 relative to the pile cap 3, the lifting adjusting device comprises a screw 40 corresponding to each pair of threaded holes, the screw 40 comprises a bottom adjusting part 400 in threaded matching with the corresponding bottom threaded hole 33, a top adjusting part 401 in threaded matching with the corresponding top threaded hole 50, and an operating part 402 positioned between the bottom adjusting part 400 and the top adjusting part 401, the threads of the bottom adjusting part 400, the top adjusting part 401 and the corresponding threaded holes are set to be that the screw 40 rotates to enable the top 31 and the positioning seat 5 to move relatively, specifically, when the screw 40 rotates clockwise, the positioning seat 5 moves downwards relative to the screw 40, the screw 40 moves downwards relative to the pile cap 3, namely, the distance of the positioning seat 5 relative to the pile cap 3 is adjusted to be reduced, and vice versa, two synchronous gears 41 (total 8 synchronous gears 41, four coplanar gears at the upper part, four coplanar gears at the lower part, namely, upper and lower two layers) are coaxially arranged on each operating part 402 at intervals from top to bottom, a synchronous belt 42 is arranged between two synchronous gears 41 between any two adjacent operating parts 402 along the circumferential direction, the four synchronous belts 42 are matched to form a rectangle, the top surfaces of the four synchronous gears 41 at the lower part are protruded upwards to form supporting surfaces, supporting plates 43 are rotatably arranged on the four synchronous gears 41 at the lower part, the supporting plates 43 and the four supporting surfaces are rotatably fixed, namely, the supporting surfaces are rotatably arranged relative to the supporting plates 43, a turbine 44 is arranged between the synchronous gear 41 at the upper part and the supporting plate 43 of one operating part 402, a rotating motor is arranged on the supporting plate 43, and the output shaft of the motor is fixedly connected with a worm 45 meshed with the turbine 44, the worm 45 rotates to drive the worm wheel 44 to rotate, the worm wheel 44 rotates to drive the corresponding screw rod 40 to move, the screw rod 40 rotates to drive the other screw rods 40 to rotate, and the height of the positioning seat 5 relative to the pile cap 3 is adjusted;
the top end of the positioning seat 5 is provided with an accommodating groove 51, the three-way jack 7 is arranged in the accommodating groove 51, the three-way jack 7 specifically comprises a vertical jack capable of supporting the bearing platform, a main jack capable of pushing a vertical jack base to enable the vertical jack to be matched with the bearing platform on the vertical jack to move forwards (so as to drive the whole bearing platform to move forwards), and a transverse jack, when the platform moves, a specially-assigned person observes the synchronous condition of the jacks and the transverse bias pulling of the platform, and the transverse jack is used for adjusting the transverse bias pulling;
the locking device 8 is arranged above the positioning seat 5, locking/unlocking arrangement is realized between the main beam 91 and the pushing device 2 through the locking device 8, when the locking device is locked, the main beam 91 is fixed on the top surface of the pushing device 2, and when the locking device is unlocked, the main beam 91 can be vertically separated from the pushing device 2 upwards under the action of a vertical jack;
the fixing device 6 comprises a pair of pipe hoop units 60 which are butted to form a pipe hoop, the longitudinal section of each pipe hoop unit 60 is in a U shape with an opening facing one side (the opening ends of the two pipe hoop units 60 are oppositely arranged), a sealing strip is arranged on the end surface of the U-shaped opening end of each pipe hoop unit 60, the lower ends of the pipe hoop units 60 are hooped on the periphery of the pressing block 302 of the cap body 30 after the pipe hoop units 60 are butted and fixed, and the upper ends of the pipe hoop units are hooped on the periphery of the positioning seat 5, so that a sealing structure is formed in a space surrounded by the;
when more than two pushing devices 2 are installed, the connecting rods 90 between the pile tops are installed and the connecting rods 90 are properly pre-tightened, attention is paid to the fact that the pre-tightening force is not too large, the pile tops are prevented from deviating, and the fact that the pile top devices are parallel along the longitudinal axis is guaranteed through adjusting the connecting rods 90;
s21, installing a bearing platform according to the pushing device 2, specifically: firstly, 2 main beams 91 positioned in a row D and a row F and cross beams correspondingly positioned above the row 3 and the row 5 are installed to form a frame, then the main beam 91 positioned in a row B and the cross beams correspondingly positioned above the row 3 and the row 5 are installed, and finally the rest beam systems are installed, wherein the main beam 91 is a box-shaped welding part, the cross beams are I-shaped welding parts, and when the main beam 91 is installed on the pile top of the pushing device 2, the lower flange of the longitudinal beam is locked by a locking device 8 to prevent the bearing platform from moving in a staggered manner;
s22, installing an operation walkway below the bearing platform, wherein the front end of the operation walkway is provided with a telescopic platform, the operation walkway comprises three walkway units which are arranged in one-to-one correspondence with the 3 main beams 91, the telescopic platform is arranged at the front end of each walkway unit, namely the front of each walkway unit is provided with the telescopic platform, the telescopic platform is arranged to enable an operator to provide support according to the telescopic platform, installing a pushing device 2 at a corresponding position, feeding each walkway unit to the bottom of the main beam 91 before installation, then placing the walking unit on a connecting rod 90, and then accurately positioning and connecting with the bearing platform;
s23, installing the operation platform according to the bearing platform, wherein the operation platform comprises a panel and a distribution beam welded with the panel to form a whole, the installation precision is noticed when the operation platform is laid, the interference with a bolt joint is avoided, the operation platform is welded with the bearing platform in the laying process and is welded into a whole, and the operation platform and the bearing platform are prevented from moving in a staggered manner;
step S23 still includes carrying out the platform after the installation work platform and does not have the year trial run, specifically is: installing a control system, performing no-load trial operation on the pile driving platform, pushing the platform forward for a preset distance, and checking whether the bearing platform at the position of each pile jacking device is separated from the locking device 8 or not before pushing after jacking;
the platform is fixed after being retracted for a preset distance;
s24, installing the platform crawler crane according to the operation platform, which is specifically as follows: assembling the platform crawler crane at the position of the cross beam, marking the operation platform at the position of the cross beam and laying a steel plate before assembling, and additionally arranging crawler crane limiting structures at the positions of two sides of the cross beam;
carrying out a walking experiment that the walking speed is adjusted to be the lowest on the operation platform along the direction of the cross beam;
walking the platform crawler crane to the position of a cross beam between the row D and the row F, assembling small bent guide frames on two sides, fixing the position of a frame body by using positioning pins after assembling is completed, wherein the keel openings of the two small bent guide frames respectively correspond to the intersection points of the row 4, the row A and the row G;
carrying out the no-load test operation of the platform, which specifically comprises the following steps: fixing the position of a platform crawler crane on the operation platform, carrying out on-load trial operation of the piling platform, pushing the platform forward for a preset distance, wherein the preparation work and the pushing process are the same as the no-load trial operation of the step S23;
s25, installing a large-row guide frame according to the bearing platform, wherein the large-row guide frame comprises a track which is arranged in front of the operation platform and extends along the transverse direction, a dragon mouth which is arranged on the track in a sliding manner, and a hydraulic system for controlling the dragon mouth to move transversely;
installing tail counterweight, power distribution cabinet, container, power cabinet and other related facilities;
s3, after debugging and commissioning are completed, construction of the steel pipe pile 11 is prepared, inspection work before construction is carried out, a large bent frame guide frame is positioned, a faucet is opened, guide construction of the large bent frame guide frame is carried out, the construction of the G-A row steel pipe pile 11 of the 9 th row is completed in sequence firstly, after the pushing is in place and fixed, the construction of the G-A row steel pipe pile 11 of the 11 th row is carried out, and the analogy is carried out in sequence, wherein the completion of one-time construction of the steel pipe pile 11 specifically comprises the following steps: positioning a large row of guide frames, lifting the steel pipe piles 11 by using the platform crawler crane to feed the keel, closing the keel, performing self-weight pile sinking, and lifting large pile hammers to the pile tops of the steel pipe piles 11 by using the platform crawler crane to perform driving after the self-weight pile sinking is finished;
pile feeding and driving of the steel pipe pile 11 are carried out from two sides of the operation platform by utilizing two small rows of guide frames, and the method specifically comprises the following steps: after two times of jacking, performing construction on G, A th row of 8 th row of steel pipe piles 11 for the first time, and then performing construction on the steel pipe piles 11 in the corresponding row once every time of jacking;
s4: measuring the pile top elevation and horizontal deviation of the newly constructed steel pipe pile 11, adjusting the height of a pushing device 2 to be installed through a lifting adjusting device, pushing out a telescopic platform at the front end of an operation walkway, and installing the pushing device 2 and a connecting rod 90 corresponding to the newly constructed steel pipe pile 11;
s5: fixing the crawler crane with the operation platform, releasing the locking device 8, retracting the telescopic platform, and arranging a connecting rod 90;
s6: pushing the platform forwards;
s7: and repeating the steps S3-S6 until the construction of each row of steel pipe piles 11 is completed.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. The construction process of the steel pipe pile in the medium-long period wave sea area is characterized by comprising the following steps of:
s1, piling steel pipe pile groups by using conventional piling equipment, wherein the steel pipe pile groups are arranged in a matrix and comprise 7 transverse rows of steel pipe piles with the labels of 1-7 rows along the moving direction of the platform and 7 longitudinal rows of steel pipe piles with the labels of A-G rows along the direction close to the caisson;
s2, assembling the piling platform on the steel pipe pile group, which comprises the following steps:
s20, installing a pushing device, wherein the pushing device comprises 9 pushing units respectively arranged at the pile tops of the steel pipe piles at the intersection points of 3 rows, 5 rows, 7 rows, B rows, D rows and F rows, each pushing unit comprises a pile cap, a lifting adjusting device, a positioning seat, a fixing device, a three-way jack and a locking device, the pile cap comprises a cap body and a cap top, the cap body is provided with a positioning groove matched with the pile top of the steel pipe pile, a rubber ring is arranged between the cap body and the corresponding steel pipe pile, a plurality of pressing seams are arranged at intervals along the circumferential direction at the lower part of the cap body so as to divide the lower part of the cap body into a plurality of pressing blocks, four bottom threaded holes are arranged at the top end of the cap body in a crossed manner along the circumferential direction, top threaded holes matched with the bottom threaded holes are arranged at the bottom end of the positioning seat, a pair of threaded holes is formed by the bottom threaded holes and the top threaded holes which are arranged oppositely up and down, the lifting adjusting device, the screw rod comprises a bottom adjusting part matched with a corresponding bottom threaded hole in a threaded manner, a top adjusting part matched with a corresponding top threaded hole in a threaded manner, and an operating part positioned between the bottom adjusting part and the top adjusting part, wherein the threads of the bottom adjusting part, the top adjusting part and the corresponding threaded hole are set into threads which enable the cap top and the positioning seat to move relatively, two synchronous gears are coaxially arranged on each operating part at an upper and lower interval, a synchronous belt is arranged between the two synchronous gears between any two adjacent operating parts along the circumferential direction, a supporting plate is rotationally arranged on the four synchronous gears positioned below the supporting plate, a turbine is arranged between the upper synchronous gear and the supporting plate at one operating part, a rotating motor is arranged on the supporting plate, an output shaft of the motor is fixedly connected with a worm meshed with the turbine, an accommodating groove is arranged at the top end of the positioning seat, the three-way jack is arranged in the accommodating groove, the fixing device comprises a pair of pipe hoop units which are butted to form a pipe hoop, the longitudinal section of each pipe hoop unit is in a U shape with an opening facing one side, sealing strips are arranged on the end faces of the U-shaped opening ends of the pair of pipe hoop units, the lower end of each pipe hoop unit is hooped on the periphery of the cap body pressing block after the pipe hoop units are butted and fixed, and the upper end of each pipe hoop unit is hooped on the periphery of the positioning seat, so that a sealing structure is formed in a space surrounded by the pipe hoops;
the adjacent fixing devices are fixed through connecting rods;
s21, mounting a bearing platform according to the pushing device;
s22, an operation walkway is installed below the bearing platform, and a telescopic platform is arranged at the front end of the operation walkway;
s23, installing the operation platform according to the bearing platform;
s24, installing a platform crawler crane according to the operation platform;
s25, installing a large-row guide frame according to the bearing platform;
s3, positioning a large-row guide frame, and lifting the steel pipe piles by using a platform crawler crane to sequentially complete the construction of the steel pipe piles in the G-A row;
s4: measuring the pile top elevation and horizontal deviation of the newly constructed steel pipe pile, adjusting the height of a pushing device to be installed through a lifting adjusting device, pushing out a telescopic platform at the front end of an operation walkway, and installing a pushing device corresponding to the newly constructed steel pipe pile;
s5: fixing the crawler crane and the operation platform, releasing the locking device, withdrawing the telescopic platform and arranging a connecting rod;
s6: pushing the platform forwards;
s7: and repeating the steps S3-S6 until the construction of each row of steel pipe piles is completed.
2. The medium-long period wave sea steel pipe pile construction process of claim 1, wherein step S21 specifically comprises: firstly installing 2 main beams positioned in the D row and the F row and cross beams correspondingly positioned above the 3 row and the 5 row to form a frame, then installing main beams positioned in the B row and cross beams correspondingly positioned above the 3 row and the 5 row, and finally installing the rest beam systems, wherein the main beams are box-shaped welding pieces, and the cross beams are I-shaped welding pieces.
3. The process for constructing a steel pipe pile in a medium-and-long-period wave sea area according to claim 1, wherein the operating walkway comprises three walkway units arranged in one-to-one correspondence with the 3 main girders, and the telescopic platform is arranged at the front end of each walkway unit.
4. The process for constructing a steel pipe pile in a medium-long period wave sea area according to claim 1, wherein the work platform comprises a face plate, and a distribution beam welded to the face plate to form a whole;
and step S23, after the operation platform is installed, the platform is subjected to no-load test operation.
5. The medium-long period wave marine steel pipe pile construction process of claim 1, wherein the large-row guide frame comprises a rail arranged in front of the operation platform and extending along the transverse direction, a keel arranged on the rail in a sliding manner, and a hydraulic system for controlling the transverse movement of the keel, wherein the completion of one-time steel pipe pile construction specifically comprises: and feeding the steel pipe pile into the keel, closing the keel, performing self-weight pile sinking, and hoisting the large pile hammer to the pile top of the steel pipe pile through the platform crawler crane after the self-weight pile sinking is finished.
6. The process of constructing a steel pipe pile in a medium-long period wave sea area according to claim 1, wherein the step S24, after installing the crawler attachment for the platform, further comprises:
carrying out a walking experiment in which the walking speed is adjusted to be lowest on the platform along the direction of the cross beam;
walking the platform crawler crane to a position of a cross beam between the row D and the row F, assembling small bent guide frames on two sides, wherein the keel openings of the two small bent guide frames respectively correspond to the intersection points of the row 4 and the row A and the row G;
and carrying out no-load test operation on the platform.
7. The process for constructing a steel pipe pile in a medium-long period wave sea area according to claim 6, wherein two small rows of guide frames are used for feeding piles from both sides of the operation platform and driving the steel pipe pile.
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Application publication date: 20201208 |