CN214401783U

CN214401783U - Buoyancy tank platform suitable for large-tonnage underwater steel pipe pile clearing device

Info

Publication number: CN214401783U
Application number: CN202023041293.8U
Authority: CN
Inventors: 徐声亮; 陈巨峰; 叶经斌
Original assignee: Ningbo Municipal Engineering Construction Group Co Ltd
Current assignee: Ningbo Municipal Engineering Construction Group Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-10-15
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a buoyancy tank platform suitable for a large-tonnage underwater steel pipe pile clearing device, which comprises a first buoyancy tank system, a second buoyancy tank system and a reinforced connection frame; the reinforced connecting frame can assemble the top plates of the two groups of floating boxes into a whole and comprises a beam system and a longitudinal beam system; a beam system having a plurality of connecting beams; each connecting cross beam is arranged along the transverse direction of the buoyancy tank platform, one end of each connecting cross beam is fixed with the first buoyancy tank system, and the other end of each connecting cross beam is fixed with the second buoyancy tank system; a stringer system having a plurality of full length connecting stringers; each connecting longitudinal beam is arranged along the longitudinal direction of the floating box platform and arranged above the beam system, and each connecting longitudinal beam is fixedly connected with the connecting beam at the corresponding position. Buoyancy tank platform possess great bearing capacity to can support large-tonnage aquatic steel-pipe pile clearing device's climbing mechanism and carry out the pile pulling operation.

Description

Buoyancy tank platform suitable for large-tonnage underwater steel pipe pile clearing device

Technical Field

The utility model relates to a flotation tank platform suitable for large-tonnage aquatic steel-pipe pile clearing device to be used for supporting jacking equipment, realize the clear operation of stake in aquatic, belong to civil engineering construction technical field.

Background

Along with the urbanization development of China, the construction scale of urban municipal road networks is greatly increased, and the urban municipal road networks are particularly obvious in long triangle and bead triangle areas. In bridge engineering construction, a 'large steel pipe + Bailey truss' system (as shown) is usually adopted as a temporary supporting structure of a bridge superstructure, so that on one hand, the communication of a river channel water system is ensured, and the flood control pressure in a flood season is avoided; on the other hand, the steel pipe pile can provide stable foundation bearing capacity, particularly in a crossing water system part (an all-round support system needs to adopt an island building cofferdam and reinforce the foundation, and an island building scheme does not have competitiveness in long triangles, bead triangles and other river alluvial fan plain areas).

After the bridge is built, temporary supporting steel pipe piles above a river bed need to be removed, so that the water blocking ratio of the river channel is reduced, and the passing requirement of ships for cleaning the river channel is met. Different from conventional trestle and other steel pipe pile pulling devices with unlimited operation clearance, the lower space of the built bridge is relatively limited, the municipal bridge mainly meets the elevation requirement of the two-bank wiring road, the clearance is often very limited, and the conventional pile pulling devices such as hoisting equipment and a vibration hammer do not have operation conditions.

At present, in a limited clearance state, a conventional steel pipe pile clearing operation method is that a diver cuts off and removes a steel pipe at the bottom of a riverbed by adopting an underwater cutting device, and the steel pipe pile below the riverbed is left in an original stratum.

The method can realize the recovery of the existing environment after the engineering construction, but the core problem is 'the waste of a large amount of steel materials' -engineering experience shows that the consumption of the steel pipe pile for temporary support in the long triangular region is about 100kg/m²~150kg/m²The weight of the temporary steel pipe pile required by a municipal cast-in-place concrete beam bridge with the length of 200m and the width of 30m is about 600-900 tons. Although the portion of steel is processed as a disposable amortization (i.e., by default, the portion of material is not recycled) when the work load is invoiced, it follows the external environmentThe change and the sudden rise of the recycling price of domestic steel products lead the recycling treatment of the partial materials to improve the use efficiency of resources and have good economic benefit.

Generally, a certain difference exists between the theoretical pulling resistance and the actual pulling resistance of the steel pipe pile, and when the theoretical pulling resistance is designed to be smaller, the difference is relatively smaller; when the design theoretical uplift resistance reaches 80 tons, the positive pressure effect (namely the lateral pressure of soil) between the soil around the pile and the steel pipe pile becomes more and more obvious along with the increase of the soil penetration depth of the steel pipe pile, so that the difference between the lateral friction resistance between the steel pipe pile and the surrounding soil and a ground survey report is increased. Therefore, when removing the steel pipe pile remaining at the bottom of the river, a facility for increasing the uplift force is required for such a steel pipe pile having a large design theoretical uplift force.

In summary, how to develop a large-tonnage underwater steel pipe pile clearing device is suitable for clearing the existing underwater steel pipe pile with larger design theory uplift resistance, and the recovery of the existing underwater steel pipe pile and the environmental recovery of the embedded position of the existing steel pipe pile are realized, which is a problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a flotation tank platform suitable for large-tonnage aquatic steel-pipe pile clearing device to support jacking equipment, make large-tonnage aquatic steel-pipe pile clearing device clear away the operation of stake in aqueous can realize. Therefore, in the prior art, the steel pipe piles remained in the original stratum can be effectively recycled under the limited clearance after the steel pipe piles are cleaned.

In order to achieve the technical purpose, the utility model adopts the following technical proposal:

a buoyancy tank platform suitable for a large-tonnage underwater steel pipe pile clearing device comprises a first buoyancy tank system, a second buoyancy tank system and an additional connection frame;

the first buoyancy tank system and the second buoyancy tank system are arranged in parallel and are positioned on two sides of the steel pipe pile to be cleaned;

the first buoyancy tank system and the second buoyancy tank system respectively comprise at least one buoyancy tank;

the reinforced connecting frame can assemble the top plates of the two groups of floating boxes into a whole and comprises a beam system and a longitudinal beam system;

the beam system is provided with a plurality of connecting beams; each connecting cross beam is arranged along the transverse direction of the buoyancy tank platform, one end of each connecting cross beam is fixed with the first buoyancy tank system, and the other end of each connecting cross beam is fixed with the second buoyancy tank system;

the longitudinal beam system is provided with a plurality of connecting longitudinal beams with full length; each connecting longitudinal beam is arranged along the longitudinal direction of the floating box platform and arranged above the beam system, and each connecting longitudinal beam is fixedly connected with the connecting beam at the corresponding position.

Preferably, the individual buoyancy tanks of the first buoyancy tank system and the second buoyancy tank system are spliced by bolts along the length direction of the buoyancy tank systems.

Preferably, the single buoyancy tank is provided with triangular stiffening outer outriggers at two transverse sides; the connecting beam is fixed with the triangular stiffening outer outrigger at the corresponding position through a bolt.

Preferably, the flotation tank is the rectangle setting, and each vertical plane of flotation tank all along the vertical stiffening rib of vertical equipartition flotation tank, along the vertical stiffening rib of vertical equipartition flotation tank.

Preferably, the inner cavity of the buoyancy tank is divided into a plurality of chambers which are communicated with each other by transverse partition plates which are uniformly distributed along the length extending direction of the inner cavity.

Preferably, more than one positioning bolt is arranged at the edge position of the buoyancy tank, and each positioning bolt is provided with a cable.

Preferably, a top plate of the first buoyancy tank system or the second buoyancy tank system is provided with a manipulator.

According to foretell technical scheme, for prior art, the utility model has the advantages of as follows:

flotation tank platform, adopt to link up the connection frame with first flotation tank system, second flotation tank system and connect into a system for this platform possesses great bearing capacity, carries out the pile pulling operation with the climbing mechanism that can support large-tonnage aquatic steel-pipe pile clearing device. And simultaneously, the flotation tank platform possess the elevation regulatory function to satisfy the highway transportation condition.

Drawings

Fig. 1 is a schematic structural view of the steel pipe pile removing device of the present invention;

fig. 2 is a schematic structural view of the reaction frame part (with the jacking mechanism) of the present invention;

fig. 3 is a partial structural schematic view of the reaction frame part (with jacking mechanism) of the present invention;

fig. 4 is a schematic structural view of the wrapping mechanism of the present invention;

in fig. 1 to 4: 1. a buoyancy tank; 2. a conversion frame; 3. a reaction frame; 31. a work platform plate; 32. a control box; 33. a holding and wrapping mechanism; 33-1, wrapping the shell; 33-2, a lifting ring; 33-3, lifting lugs; 33-4, a lifting mechanism; 33-5, a bond wrapping block; 33-6, a wrapping surface; 34. rib-dense thick stiffening plates; 35. arc-shaped connecting steel plates; 4. A jacking mechanism; 5. a robot arm.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless specifically stated otherwise, the relative arrangement of the components and steps, expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, for the purpose of convenience of description, the vertical direction, the transverse direction and the longitudinal direction are perpendicular to each other, and the two directions in the vertical direction are up and down directions respectively.

As shown in fig. 1 to 4, the large-tonnage underwater steel pipe pile clearing device of the present invention comprises a buoyancy tank platform, a reinforcing connection frame, a reaction frame 3 and a jacking mechanism 4; wherein:

the buoyancy tank platform comprises two groups of buoyancy tank systems which are arranged in parallel and positioned at two sides of the steel pipe pile to be cleared, and each group of buoyancy tank system at least comprises one buoyancy tank 1; the two groups of buoyancy tank systems are respectively a first buoyancy tank system and a second buoyancy tank system.

The reinforcing connecting frame can assemble the top plates of the two groups of buoyancy tank systems into a whole;

the reaction frame 3 comprises a working platform plate 31, a ribbed thick stiffening plate and a gripping and wrapping mechanism 33;

the middle part of the operation platform plate 31 is provided with a passage allowing the holding mechanism 33 to pass through, and the edge positions are positioned at the two transverse ends and are respectively and directly connected with the top plates of the first buoyancy tank system and the second buoyancy tank system correspondingly; meanwhile, a bracket is respectively arranged above the operation platform plate 31 at two transverse sides, and the bracket is correspondingly a first bracket and a second bracket;

the dense rib thick stiffening plates are symmetrically arranged at the outer sides of the channels and are respectively a first dense rib thick stiffening plate and a second dense rib thick stiffening plate; the first multi-ribbed thick stiffening plate is fixed with the first bracket, and the second multi-ribbed thick stiffening plate is fixed with the second bracket;

the two jacking mechanisms 4 are respectively a first jacking mechanism 4 and a second jacking mechanism 4; the first jacking mechanism 4 is supported by a first bracket, the second jacking mechanism 4 is supported by a second bracket, and the jacking of the first jacking mechanism 4 and the jacking of the second jacking mechanism 4 are both fixed with the operation platform plate 31,

the gripping mechanism 33 comprises a gripping shell 33-1, a lifting ring 33-2, a lifting mechanism 33-4 and a gripping block 33-5;

the inner wall of the holding and wrapping shell 33-1 is arranged in a conical shape, and is positioned on two transverse outer side walls which are respectively and correspondingly connected with the first multi-ribbed thick stiffening plate and the second multi-ribbed thick stiffening plate;

the lifting ring 33-2 is arranged at the upper end of the holding and wrapping shell 33-1 and is coaxial with the holding and wrapping shell 33-1;

the number of the lifting mechanisms 33-4 is at least two, and the lifting mechanisms are uniformly distributed along the circumferential direction of the holding and wrapping shell 33-1; one end is connected with the gripping shell 33-1, and the other end is connected with the lifting ring 33-2;

the number of the holding wrapping blocks 33-5 is at least three, and the holding wrapping blocks are uniformly distributed along the circumferential direction of the inner cavity of the holding wrapping shell 33-1; the upper end of each bonding block 33-5 is connected with a lifting ring 33-2 through a lifting lug 33-3, the outer side wall of each bonding block 33-5 is matched with the inner wall of the bonding shell 33-1 at the corresponding position in shape, and the inner side wall of each bonding block 33-5 is provided with a bonding surface 33-6 which can be matched with the outer wall of the steel pipe pile to be removed in shape;

under the power drive of the lifting mechanism 33-4, each holding and wrapping block 33-5 is lifted along with the lifting of the lifting ring 33-2, and when the holding and wrapping block 33-5 is lifted along the inner wall of the holding and wrapping shell 33-1, each holding and wrapping block 33-5 can surround and embrace the steel pipe pile to be cleaned; when the bond pads 33-5 descend along the inner wall of the bond casing 33-1, each bond pad 33-5 can release the steel pipe pile to be removed.

Preferably, the reinforcing and connecting frame comprises a beam system and a longitudinal beam system; connecting the cross beam and the longitudinal beam;

Preferably, the jacking mechanism 4 and the lifting mechanism 33-4 are jacks; the jacking mechanism 4 is a 500-ton jack; the lifting mechanism 33-4 is a jack of 50 tons.

Preferably, the bonding surface is subjected to the net-shaped grooving treatment, and when the bonding surface is attached to the outer wall of the steel pipe pile to be removed, the friction coefficient between the bonding surface and the steel pipe pile to be removed is 0.5.

Preferably, the individual buoyancy tanks in each buoyancy tank system group are spliced by bolts along the length direction of the buoyancy tank system; meanwhile, the single buoyancy tank is positioned at two transverse sides and is provided with a triangular stiffening outer cantilever frame; the connecting beam is fixed with the triangular stiffening outer outrigger at the corresponding position through a bolt.

Preferably, the flotation tank is the rectangle form setting, and each vertical plane of flotation tank all along the vertical stiffening rib of vertical equipartition flotation tank, and the cavity of a plurality of intercommunication is separated into through the cross slab along self length extending direction equipartition to the inner chamber of flotation tank simultaneously.

Preferably, the buoyancy tank platform is positioned at two longitudinal sides and is respectively provided with two positioning bolts; a cable is disposed on each of the pegs.

Preferably, a robot 5 is mounted on the pontoon platform.

Preferably, the first multi-ribbed stiffening plate and the second multi-ribbed stiffening plate are connected through two arc-shaped connecting steel plates which are symmetrically arranged.

Another technical purpose of the utility model is to provide a large-tonnage aquatic steel-pipe pile clearance method, realize based on foretell large-tonnage aquatic steel-pipe pile clearing device, include following step:

1) cutting all the steel pipe piles to be removed to be 20cm above the water surface by using a small floating pontoon, and removing the cut parts, wherein the remained parts are the steel pipe piles to be pulled out;

2) assembling the large-tonnage underwater steel pipe pile clearing device on site;

3) the large-tonnage underwater steel pipe pile removing device assembled on site is adopted to remove the steel pipe pile to be removed in the step 1), and the method specifically comprises the following steps:

3.1, determining a limit point A for lifting the steel pipe pile to be pulled out from the riverbed and the draft of the buoyancy tank according to the clearance H and the water level of the position where the steel pipe pile to be pulled out is located;

the center of a pulley block of a hoisting mechanism arranged on the conversion frame 2 is coincided with the center of the steel pipe pile to be pulled out by utilizing a positioning bolt arranged on the buoyancy tank platform and adjusting the length of a mooring rope;

injecting water into the buoyancy tank cabin by using a water pump to realize that the buoyancy tank integrally sinks to a preset draft and provide space for pile cleaning operation;

3.2, starting the lifting mechanism 33-4 until each wrapping block 33-5 of the wrapping mechanism 33 can surround and embrace the steel pipe pile to be pulled out;

3.3, starting a jacking mechanism 4 to move the pile top of the steel pipe pile to be pulled up to an upper limit point;

3.4, releasing the pressure of the lifting mechanism 33-4, so that each bond wrapping block 33-5 of the bond wrapping mechanism 33 falls under the self weight until the bond wrapping block is separated from the steel pipe pile to be pulled out;

3.5, falling the jacking mechanism 4 to a lower limit point;

3.6, repeating the steps 3.2-3.5 until the pile top of the steel pipe pile to be pulled out reaches a high limit point below the main structure of the existing bridge, cutting the steel pipe pile above the water surface by adopting cutting equipment, and hoisting the cut steel pipe pile to a transport barge by utilizing a manipulator 5;

and (4) completely removing the whole steel pipe pile to be removed according to the mode of the step 3.6.

Preferably, the assembly steps of the large-tonnage underwater steel pipe pile clearing device on site comprise:

2.1, lifting the buoyancy tank into water by using an automobile crane, and lifting one row of buoyancy tank into water on each of two sides of the steel pipe pile to be removed;

2.2, arranging temporary anchor piles on the shore to serve as temporary fixing supporting points in the assembling stage of the buoyancy tanks;

2.3, connecting two adjacent buoyancy tanks on the same side of the steel pipe pile to be removed in series by using a pin bolt to form a buoyancy tank system;

erecting a connecting cross beam on two oppositely arranged buoyancy tanks at two sides of the steel pipe pile to be cleared by adopting an automobile crane; each connecting beam is erected, namely the connecting beam and the two buoyancy tanks are connected into a whole by bolts;

2.4, hoisting the manipulator 5 to the buoyancy tank platform by using an automobile crane and installing;

hoisting the preassembled reaction frame 3 to the buoyancy tank platform integrally by using an automobile crane and installing;

2.5, hoisting the jacking mechanism 4 to the buoyancy tank platform by using an automobile crane, and installing the jacking mechanism in place;

and 2.6, hoisting the connecting longitudinal beam to a corresponding position by using an automobile crane and carrying out field assembly.

Preferably, 4 positioning points are selected to be in one-to-one corresponding connection with positioning bolts arranged on the buoyancy tank platform, and the positioning points are anchor piles on land or steel pipe piles to be removed or embedded parts on existing piers.

Therefore, the utility model discloses a flotation tank platform possess following 3 functions:

1) has larger bearing capacity.

2) Possesses the height adjustment function. The buoyancy tank has an elevation adjusting space of 1 m-1.5 m during operation, so that equipment has a flexible adjusting space when facing different water depths and different clearances; on one hand, the long triangle and the bead triangle areas are alternated in rainy seasons and dry seasons, the water level difference is about 1.2-1.8 m, and when the clearance under the bridge is small, the elevation adjusting function of the buoyancy tank is important; on the other hand, in order to acquire more efficient buoyancy condition, the great value can be got to the flotation tank height, and when the required lifting force of pile pulling is less, the flotation tank draft is shallower, and the surface of water space requirement of a whole set of device increases, leads to the operation headroom not enough, needs its self to carry out the elevation adjustment.

3) The road transportation condition is provided. The size of the single buoyancy tank is adjusted to 6m long, 3m wide and 3m high.

Therefore, the utility model discloses the flotation tank design as follows:

the buoyancy tank is of a box type structure and comprises a top plate, a bottom plate, a web plate and a transverse partition plate. The top plate and the bottom plate are provided with stiffening ribs made of full-length channel steel so as to improve the out-of-plane rigidity of the steel plate; the web is provided with a longitudinal channel steel stiffening rib besides a vertical channel steel serving as the stiffening rib. The diaphragm plate is provided with a manhole (used as a through channel between cabins of the buoyancy tank) and a plate type stiffening rib (used for improving the external rigidity of the diaphragm plate); the bottom of the diaphragm plate is provided with 2 through holes which are used for communicating water stored in the chamber.

The inside high-grade anticorrosive application that adopts of flotation tank to adapt to the water storage demand: when the operation clearance is small, water is injected into a cabin of the buoyancy tank through a water pump, so that the buoyancy tank is integrally sunk, and a space is provided for pile cleaning operation; secondly, when the steel pipe pile resists and pulls out the reaction force greatly, arrange the water in the flotation tank gradually outward through the water pump, both keep the working space, can release the flotation tank bearing capacity step by step.

Two ends of the single buoyancy tank are respectively provided with 1 water pump for adjusting the water level in the buoyancy tank.

The assembled floating boxes are of a double-body floating box structure, the floating boxes are connected with each other only on the top surface of the platform through the conversion frame 2, and the channels among the floating boxes serve as passing channels for steel pipe piles to be removed.

The buoyancy tank platform is not provided with power, and the functions of positioning and moving of the buoyancy tank platform are realized through the anchor pile and mooring rope system.

On one hand, a rudder needs to be configured for power configuration, the spacing between the steel pipe piles of the temporary supporting system on the water is usually not large (the span is not more than 9m, the width is not more than 3m, a local encryption area is smaller, and the steel pipe pile dependent area is smaller), and the direction control difficulty is large; on the other hand, the single movement range of the pile pulling ship is small, road transportation is adopted for transferring between projects (a water system in which the pile pulling project is not in navigation, otherwise, the clearance is not small), and power does not need to be set.

Positioning bolts are arranged at two ends of a single buoyancy tank, and mooring ropes are arranged on the positioning bolts. During operation, 4 positioning points are selected to be connected with 4 cables on the assembled buoyancy tank, and the position of the buoyancy tank is controlled by adjusting the length of the cables. The anchor point can be an anchor pile on land, or a steel pipe pile to be pulled out on water, wherein the steel pipe pile with the largest bearing capacity is selected as the anchor pile under the normal condition, and the anchor pile is usually positioned near a pier column, or can be an embedded part on the existing pier column.

The core functions of the conversion frame 2 are: 2 buoyancy tank systems are connected into a whole (buoyancy tank platform);

the conversion frame 2 adopts the structure system of vertically and horizontally girder (fastening connection frame), and wherein densely covered crossbeam system (connecting beam) assembles 2 flotation tanks into a whole, and vertical system provides the plane external support of each crossbeam, makes conversion frame 2 possess two-way rigidity and torsional rigidity simultaneously, sets up the rigidity flat bed at the flotation tank top in other words, ensures that the flotation tank platform only sets up under the state of supporting at the top, the overall stability of hull.

The connecting beams are connected with the buoyancy tanks through bolts, the distance between the connecting beams is 1.0m, and HN600 section steel is adopted as the connecting beams. Wherein, an embedded nut is arranged in the buoyancy tank, and the nut and a diaphragm plate or a web plate of the buoyancy tank are welded into a whole; the longitudinal beams are arranged on the transverse beam system.

The two sides of the buoyancy tank are provided with triangular stiffening outer outriggers as the connecting structure of the conversion frame 2. Along the length direction of the buoyancy tank system, the buoyancy tank system is connected through bolts, and only a vertical force transmission structure (also serving as a horizontal force transmission structure) is provided. The longitudinal and transverse beams of the conversion frame 2 are all made of double-spliced HN600 section steel so as to ensure the whole bearing capacity and rigidity of the conversion frame 2.

When the device pulls out the steel-pipe pile, single length of cuting only receives clearance restriction under the bridge, so the weight of steel-pipe pile single section is corresponding great, and the manual handling degree of difficulty is great, and efficiency is crossed lowly. Therefore, 1 jib crane was provided as the robot 5.

Climbing mechanism, adopt large-tonnage jack to provide vertical pile pulling force, provide the pull-up force by 2 big stroke jacks of 500 tons, the biggest stroke of single jack is 50 cm.

The work platform board 31 is arranged. The jacking mechanism is connected with the operation platform plate 31, and the operation platform plate 31 is directly connected with the buoyancy tank. And a large-diameter channel is arranged in the center of the operation platform plate for the steel pipe pile to go in and out.

Note: the operation platform has higher torsional rigidity, firstly ensures the connection between the whole device and the buoyancy tank (instead of through the conversion frame 2, the conversion frame 2 only maintains the integrity of the buoyancy tank system, but not the integral stability of the device), and secondly the platform enables the device to form a whole body, thereby being convenient for the integral transportation and assembly (in the scheme of the winch, all core components need to be assembled on the site of the bridge site).

The semi-submersible structure is adopted, namely the holding mechanism is positioned below the platform operation plate, the jack (jacking mechanism 4) is positioned above the operation platform plate, the jack (jacking mechanism 4) is arranged in an inverted mode, the semi-submersible structure enables the holding mechanism to be coupled with the steel pipe pile below the floating box platform, under normal conditions, the pile top elevation of the pile foundation for temporary supporting is slightly higher than the water surface, before the large-tonnage steel pipe pile is pulled out, the floating box is at the lowest bearing tonnage, the water draft of the floating box is shallow, the distance between the top surface of the floating box platform and the water surface is relatively large, and the semi-submersible structure can well enable the holding mechanism to be suitable for the situation.

Note: although the method of filling water into the buoyancy tank and pumping water can solve such problems, the operation efficiency is greatly reduced.

The gripping and wrapping mechanism is annular, and two ends (180 degrees) of the gripping and wrapping mechanism are welded with the thick stiffening plate with the dense ribs into a whole.

The gripping mechanism can be composed of 6 solid steel blocks, and the contact surface of the gripping mechanism and the steel pipe pile is processed by adopting a reticular grooving, so that the roughness of the friction surface is increased. The thickness of the steel block is not less than 50 cm.

The gripping mechanism adopts 4 jacks (33-4) with 50 tons as adjusting power, so that enough positive pressure FN is ensured between the gripping block and the steel pipe pile, namely the friction coefficient mu between the gripping block and the steel pipe pile is about 0.5 (the friction coefficient between steel and steel is 0.4-0.6, the median value is taken after grooving treatment is considered), and if the pull-out resistance of the steel pipe pile is 200 tons, the positive pressure needs 400 tons. When the diameter of the steel pipe pile is 630mm, the hoop normal stress of the steel pipe pile reaches 4MPa, the hoop compressive stress of the steel pipe pile is 126MPa (t =20 mm)/252 MPa (t =10 mm) — the large-tonnage steel pipe pile is pulled out, not only is the control limit of the vertical load, but also the influence of the coupling device on the steel pipe pile needs to be considered.

The positive pressure conduction between the holding block and the steel pipe pile is also the key of the utility model, because the lateral deformation space is limited, the jack (jacking mechanism 4) can not be arranged horizontally and only vertically. Therefore, a special conversion bracket system is designed, so that the vertical stroke provided by the jack (jacking mechanism 4) is adjusted, and the state of tightness between the jack and the steel pipe pile is realized through the holding and wrapping block.

The bond wrapping block is divided into a bond wrapping part and a connecting part, the thickness of the bond wrapping part is 150mm, and the contact surface of the bond wrapping part and the steel pipe is processed by grooving; the thickness of the connecting part is determined according to the size of the steel pipe to be pulled, the smaller the size of the steel pipe is, the larger the thickness of the connecting part is (the range which can be adjusted by the vertical stroke of the jack is smaller, and the fastening effect is more.

The principle of the vertical stroke adjusting bond block of the jack (the lifting mechanism 33-4) is realized by a rigid bond shell. The outer side of the gripping outer shell is directly connected with the ribbed thick stiffening plate (180 degrees). The inner wall is in an inward inclined structure. 1 jack (lifting mechanism 33-4) is arranged at the bottom of the gripping shell at intervals of 90 degrees, a steel ring (lifting ring) is supported at the top of the jack (lifting mechanism 33-4), 1 lifting lug 33-3 is arranged below the lifting ring at intervals of 60 degrees, and the lifting lug 33-3 is connected with the gripping block through a bolt pin. When the jack (the lifting mechanism 33-4) moves upwards, the steel ring drives the lifting lug 33-3 to enable the bond wrapping steel block to synchronously move upwards, the bond wrapping block is blocked by the bond wrapping shell and moves inwards to the side of the hole, and the purpose of tight contact of the steel pipe pile to be pulled is achieved.

The buoyancy tank platform is provided with a control box to form an oil supply/drainage loop with the jacking mechanism and the lifting mechanism through hydraulic pipelines.

In addition, a stiffener with the thickness of 60mm and a stiffener with the thickness of 30mm is arranged between the jack (jacking mechanism 4) and the gripping mechanism to serve as a vertical load transfer device.

b. 2 arc-shaped connecting steel plates 35 are arranged between the multi-ribbed stiffening plates, wherein the arc-shaped design is used for ensuring the channel space required by pulling out the middle steel pipe pile and the operation space required by cutting and hoisting; the thickness of the steel plate is not less than 50mm, the steel plate is connected, a lateral supporting structure is arranged on the upper parts of the 2 vertical force transmission components, and the lateral supporting structure and the holding and wrapping type structure form a closed loop on a vertical surface, so that the rigidity and the overall stability of the device are enhanced. In addition, 2 lifting lugs 33-3 are arranged on the arc-shaped connecting steel plate and are used as lifting points for integral lifting of the equipment.

c. The jack (jacking mechanism 4) is arranged in the bracket, and the bracket is welded on the ribbed stiffening plate.

d. The jack (jacking mechanism 4) is connected with the operation platform plate through a bolt.

Claims

1. A buoyancy tank platform suitable for a large-tonnage underwater steel pipe pile clearing device is characterized by comprising a first buoyancy tank system, a second buoyancy tank system and a reinforced connecting frame;

2. The buoyancy tank platform suitable for the large-tonnage underwater steel pipe pile clearing device as claimed in claim 1, wherein the individual buoyancy tanks of the first buoyancy tank system and the second buoyancy tank system are spliced together by bolts along the length direction of the buoyancy tank systems.

3. The buoyancy tank platform suitable for the large-tonnage underwater steel pipe pile clearing device as recited in claim 1, wherein the single buoyancy tank in the first buoyancy tank system and the second buoyancy tank system is provided with triangular stiffening outer outriggers at both lateral sides; the connecting beam is fixed with the triangular stiffening outer outrigger at the corresponding position through a bolt.

4. The buoyancy tank platform suitable for the large-tonnage underwater steel pipe pile clearing device as claimed in claim 1, wherein the buoyancy tank is rectangular, and each vertical plane of the buoyancy tank is vertically and uniformly provided with buoyancy tank vertical stiffening ribs and longitudinally and uniformly provided buoyancy tank longitudinal stiffening ribs.

5. The buoyancy tank platform suitable for the large-tonnage underwater steel pipe pile clearing device as claimed in claim 4, wherein an inner cavity of the buoyancy tank is divided into a plurality of chambers which are communicated with each other by transverse partition plates which are uniformly distributed along the length extending direction of the buoyancy tank.

6. The buoyancy tank platform suitable for the large-tonnage underwater steel pipe pile clearing device as claimed in claim 4, wherein more than one positioning bolt is arranged at the edge of the buoyancy tank, and each positioning bolt is provided with a cable.

7. The buoyancy tank platform suitable for the large-tonnage underwater steel pipe pile clearing device as claimed in claim 4, wherein a manipulator is mounted on a top plate of the first buoyancy tank system or the second buoyancy tank system.