CN214401780U - Buoyancy tank platform suitable for ultra-low clearance existing steel pipe pile removing system - Google Patents
Buoyancy tank platform suitable for ultra-low clearance existing steel pipe pile removing system Download PDFInfo
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- CN214401780U CN214401780U CN202023032154.9U CN202023032154U CN214401780U CN 214401780 U CN214401780 U CN 214401780U CN 202023032154 U CN202023032154 U CN 202023032154U CN 214401780 U CN214401780 U CN 214401780U
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Abstract
The utility model discloses a buoyancy tank platform suitable for an ultra-low clearance existing steel pipe pile clearing system, which comprises a first buoyancy tank, a second buoyancy tank and a reinforcing connecting frame flat layer for connecting the top plates of the two buoyancy tanks into a whole; the first buoyancy tank and the second buoyancy tank are arranged in parallel and are positioned on two sides of the existing steel pipe pile to be removed; the reinforced connecting frame flat layer comprises a connecting cross beam, a connecting longitudinal beam and a connecting stiffening rib; the connecting cross beams and the connecting longitudinal beams are provided with a plurality of 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, and the other end of each connecting cross beam is fixed with the second buoyancy tank; each connecting stringer is arranged along the longitudinal direction of the pontoon platform. Buoyancy tank platform possess great bearing capacity and elevation regulatory function, can lift by crane the support of mechanism in the steel-pipe pile clearance system under water for the steel-pipe pile under the ultralow headroom (the headroom can be low to 2.5 meters) pulls out the construction operation under water and becomes reality.
Description
Technical Field
The utility model relates to a flotation tank platform suitable for super low headroom existing steel-pipe pile clearance system, the support of hoisting mechanism among the mainly used steel-pipe pile clearance system belongs 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 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 the 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, as shown in figure 1.
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, as shown in fig. 2.
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. The portion of the steel is treated as a one-time amortization despite the invoicing of the schedule(that is, the part of materials are not recovered by default), but the recovery price of domestic steel rises (as shown in 3) along with the change of external environment, so that the recovery treatment of the part of materials not only improves the use efficiency of resources, but also has good economic benefit.
SUMMERY OF THE UTILITY MODEL
The utility model is not enough to prior art, a flotation tank platform suitable for existing steel-pipe pile clearance system of ultralow headroom is provided, support with lifting by crane the mechanism in the steel-pipe pile clearance system under water, make the steel-pipe pile under the ultralow headroom (the headroom can be low to 2.5 meters) pull out the construction operation under water and become reality, to prior art, under the limited headroom, the steel-pipe pile clears away the operation back, and the steel-pipe pile of reservation in the original place layer can effectively be retrieved.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
a buoyancy tank platform suitable for an ultra-low clearance existing steel pipe pile removing system comprises a first buoyancy tank, a second buoyancy tank and a reinforcing connecting frame flat layer, wherein the reinforcing connecting frame flat layer is used for connecting top plates of the two buoyancy tanks into a whole;
the first buoyancy tank and the second buoyancy tank are arranged in parallel and are positioned on two sides of the existing steel pipe pile to be removed; each buoyancy tank is provided with a water pump; the buoyancy tank can realize elevation adjustment through water injection or drainage of the water pump;
the reinforced connecting frame flat layer comprises a connecting cross beam, a connecting longitudinal beam and a connecting stiffening rib;
the connecting cross beam is provided with a plurality of 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, and the other end of each connecting cross beam is fixed with the second buoyancy tank;
the connecting longitudinal beam is provided with a plurality of connecting longitudinal beams; each connecting longitudinal beam is arranged along the longitudinal direction of the buoyancy tank platform, each connecting longitudinal beam is formed by splicing a plurality of longitudinal beam sections, and the end part of each longitudinal beam section is fixedly connected with connecting cross beams positioned at the two ends of the longitudinal beam section;
and connecting stiffening ribs are uniformly arranged on two sides of the position where the connecting cross beam is welded and fixed with the longitudinal beam sections.
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 by cross partitions uniformly distributed along the length extension direction of the buoyancy tank.
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.
According to foretell technical scheme, for prior art, the utility model has the advantages of as follows:
the utility model discloses will lift by crane equipment installation on the flotation tank platform, can adjust the draft of flotation tank platform, make steel-pipe pile clearing device satisfy the requirement of limited headroom to through lifting by crane equipment with the surface of water certain height (can be 20 cm) below waiting to clear away the steel-pipe pile and relapse to carry to cutting one by one after drawing to the limit for height position and remove, until will waiting to clear away the steel-pipe pile complete pull out. Therefore, the utility model discloses can realize waiting to clear away the complete recovery of steel-pipe pile.
Drawings
FIG. 1 is a schematic structural diagram of clearance in steel pipe pile pulling operation of a conventional trestle;
FIG. 2 is a schematic structural diagram of a conventional trestle for cutting and recovering a steel pipe pile;
FIG. 3 is a graph showing the domestic steel recovery price;
fig. 4 is a schematic structural view of the existing steel pipe pile removing device of the present invention;
in fig. 4: 1-1, a buoyancy tank; 1-2, vertical stiffening ribs of the buoyancy tank; 1-3, longitudinal stiffening ribs of the buoyancy tank; 1-4, a water pump; 2-1, connecting a cross beam; 2-2, connecting the longitudinal beams; 2-3, connecting stiffening ribs; 2-4, hanging bracket; 3-1, frame beam; 3-2, lateral inclined struts; 3-3, transverse diagonal bracing; 4-1, operating platform plates; 4-2, a support; 4-3, a winch; 4-4, steel wire ropes; 4-5, a lifting hook; 5-1, positioning bolts; 5-2, and a cable.
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. 4, the ultra-low clearance existing steel pipe pile clearing system of the present invention comprises a buoyancy tank platform, a conversion frame and a hoisting mechanism; wherein:
the buoyancy tank platform comprises two buoyancy tanks 1-1 which are arranged in parallel and positioned at two sides of the existing steel pipe pile to be cleared, and each buoyancy tank 1-1 is provided with a water pump 1-4; the buoyancy tank 1-1 can realize elevation adjustment through water injection or drainage of the water pump 1-4; the two buoyancy tanks 1-1 are respectively a first buoyancy tank and a second buoyancy tank.
The reaction frame is supported above the buoyancy tank platform and is a door-shaped frame beam 3-1, and comprises two frame beam stand columns which are arranged in parallel and a frame beam 3-1 cross beam which connects the upper ends of the two frame beam stand columns; the fixed part of the hoisting mechanism is arranged on the buoyancy tank platform, the actuating part is suspended on the cross beam of the portal frame beam 3-1, and the actuating part can perform lifting motion relative to the existing steel pipe pile to be removed under the power action of the hoisting mechanism.
Therefore, the utility model discloses a flotation tank platform possess following 3 functions:
1) has larger bearing capacity. The steel pipe pile single pile supporting characteristic value Ra of the cast-in-place concrete box girder temporary supporting system is usually about 25 tons to 40 tons (mainly based on the convenience of construction operation and the economy of temporary measure material investment, when the requirement of single-point supporting reaction force is larger, the single pile supporting system is usually shared in a multi-pile form instead of increasing the single pile bearing capacity), the safety coefficient K is usually 2.0, and the peak value of uplift force is usually about 50 tons to 80 tons. Considering the non-uniformity of load distribution, and simultaneously considering the dead weight of the buoyancy tank, the dead weight of equipment and the water carrying capacity during the elevation adjustment of the buoyancy tank, the buoyancy guarantee coefficient of the assembled floating vessel is not lower than 1.75, namely the integral buoyancy is not lower than 140 tons.
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 maximum size of a single buoyancy tank must not exceed 12m (length) x 3.5m (width) x 4.5m (height).
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 plate is provided with vertical channel steel as a vertical stiffening rib 1-2 of the buoyancy tank, and is also provided with longitudinal channel steel as a longitudinal stiffening rib 1-3 of the buoyancy tank. 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 the floating box cabin through the water pumps 1-4, so that the floating box 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, discharge the water in the flotation tank gradually through the water pump 1-4, not only keep the working space, but also can release the bearing capacity of the flotation tank gradually.
Two ends of the single buoyancy tank are respectively provided with 1 water pump 1-4 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 a conversion frame, and a channel between the floating boxes is used as a passing channel for the steel pipe piles to be removed, as shown in the following figures. The minimum size of a single fabricated buoyancy tank must be no less than 10.0m (length) x 3.0m (width) x 3.0m (height) -a single buoyancy tank can provide 75 tons of buoyancy at a rated draft of 2.5 m.
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 5-1 are arranged at two ends of a single buoyancy tank, and cables 5-2 are arranged on the positioning bolts 5-1. During operation, 4 positioning points are selected to be connected with 4 cables 5-2 on the assembled buoyancy tank, and the position of the buoyancy tank is controlled by adjusting the length of the cables 5-2. 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 conversion frame is a reinforced connection frame flat layer; the top plates of the two floating boxes are assembled into a whole through a reinforcing connecting frame flat layer. The lower ends of the two frame beam stand columns are all installed above the floating box platform through reinforcing and connecting frame flat layers. The core functions of the switching rack mainly include the following 2 aspects:
1) 2 buoyancy tanks are connected into a whole (buoyancy tank platform);
2) provides an operation platform for the reaction frame system and the transportation frame.
The conversion frame adopts a longitudinal and transverse beam structure system (reinforcing and connecting frame flat layer), wherein a transverse beam system (connecting beams 2-1) is densely distributed to assemble 2 buoyancy tanks into a whole, and a longitudinal system provides out-of-plane support for each transverse beam, so that the conversion frame has bidirectional rigidity and torsional rigidity at the same time, namely, a rigid flat layer is arranged at the top of each buoyancy tank, and the integral stability of the ship body is ensured when the buoyancy tank platform is only supported at the top.
The connecting beams 2-1 are connected with the buoyancy tanks through bolts, the distance between the connecting beams 2-1 is 1.0m, and HN600 section steel is adopted for the connecting beams 2-1. 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 connecting beam 2-1 is connected with the longitudinal beams by common bolts (only web parts are connected, flange parts are not connected so as to reduce the field assembly engineering amount), 2 connecting longitudinal beams 2-2 are arranged on a single buoyancy tank, and the specification of the connecting longitudinal beam 2-2 is consistent with that of the connecting beam 2-1.
The reaction frame is of a portal structure, and the height of the reaction frame is 1.5-2.0 m. The reaction frame comprises 3 parts such as upright posts, cross beams, inclined struts and the like. All parts are made of HM section steel, so that flanges and webs of all members can be connected with each other (the joint of all members is provided with a stiffening rib, and the local stability of the members is ensured). In other words, the reaction frame is a door-shaped frame beam 3-1 and comprises two frame beam upright columns which are arranged in parallel and a frame beam cross beam which connects the upper ends of the two frame beam upright columns; the lower end of one frame beam upright column of the door-shaped frame beam 3-1 and the connecting point of the reinforcing connecting frame flat layer are arranged right opposite to the first floating box, and the lower end of the other frame beam upright column of the door-shaped frame beam 3-1 and the connecting point of the reinforcing connecting frame flat layer are arranged right opposite to the second floating box; the frame beam 3-1 cross beam is arranged across the existing steel pipe pile to be removed.
And connecting stiffening ribs 2-3 are arranged in reaction frame areas (the transverse inclined struts 3-3 and the lateral inclined struts 3-2) and the switching frame positions to ensure the local stability of the member. The lateral inclined strut 3-2 and the transverse inclined strut 3-3 are obliquely arranged relative to the frame beam upright post, the upper ends of the lateral inclined strut 3-2 and the transverse inclined strut 3-3 are fixed with the frame beam upright post, the lower end of the lateral inclined strut 3-2 is fixed with the longitudinal beam section at the corresponding position, and the lower end of the transverse inclined strut 3-3 is fixed with the connecting cross beam at the corresponding position.
And a winch 4-3 is used as a power device for pulling out the steel pipe pile. The rated lifting force of the domestic high-power winch 4-3 is 10 tons. Through the pulley block, the pull-up force is improved to 60-80 tons. An operation platform plate 4-1 is arranged at a position, where a winch 4-3 is scheduled to be installed, of the floating box platform, the operation platform plate 4-1 is fixed with the first floating box and the second floating box respectively, a support 4-2 is arranged on the operation platform plate 4-1, and the winch 4-3 is installed on the support 4-2.
The winch 4-3 is driven by electric power, a distribution box is arranged on the buoyancy tank, and the electric power is transmitted by land.
The reaction frame is used for applying the traction force provided by the winch 4-3 to the pile top of the steel pipe pile in a conversion direction.
Note 1: the height of the reaction frame is too high, so that the height of the device above the water surface exceeds the clearance below the bridge, and the device cannot work; the reaction frame is too low in height, and single pile pulling length is less, influences the operating efficiency, has reduced waste recovery value simultaneously (when single section steel pipe length exceeded 2m, can also be used for the regulation section of steel-pipe pile extension, length is less than 1m and can only press waste recovery).
Note 2: the door type reaction frame is made of HM section steel, the maximum height of HW section steel is only 450mm, and the bearing capacity is low; the flange width of the HN-shaped steel is too small, the out-of-plane stability is poor, if the double-spliced HN-shaped steel is adopted, the connection structure at the splicing side is difficult to set, and the overall performance of the structure is influenced.
The middle part of a beam at the top of the counterforce frame is provided with 10 fixed pulley frames, and a pulley block system is formed by a steel wire rope 4-4 and a movable pulley at the lower part of the beam, so that the magnification of the traction force of the winch 4-3 reaches 10. The bottom of the movable pulley block frame is provided with a lifting hook 4-5 which is connected with the steel pipe pile.
All components of the reaction frame are connected in a welding mode, after a single project is completed, welding seams among the components are cut by a welding gun, and welding is carried out when the reaction frame is used next time.
Note: the reaction frame has relatively small self weight and relatively high safety coefficient, so that the welding connection process with certain damage is adopted.
Method of implementation
The first stage is as follows: on-site assembly
1) Firstly, lifting a buoyancy tank into water by using an automobile crane;
2) arranging temporary anchor piles on the shore to serve as temporary fixing supporting points in the assembling stage of the buoyancy tanks;
3) erecting each connecting beam 2-1 of the conversion frame on 2 buoyancy tanks by using an automobile crane, wherein each connecting beam 2-1 and each buoyancy tank are integrally connected by using bolts when each connecting beam is erected;
4) a connecting longitudinal beam 2-2 of the conversion frame is installed by adopting an automobile crane;
5) adopt mobile crane installation reaction frame and pulley system, wherein, the welding order of each component of reaction frame is: firstly, welding a frame beam cross beam and a frame beam upright post into a whole, namely a door-shaped frame beam, on land; hoisting the door-shaped frame beam to the conversion frame, and welding the frame beam upright post and the connecting cross beam of the conversion frame into a whole by adopting field welding; installing a transverse inclined strut; and fourthly, installing a lateral inclined strut.
6) Installing an operation platform plate 4-1 of a winch 4-3, and installing the winch 4-3 at the same time;
7) installing a steel wire rope 4-4 from the winch 4-3 to a pulley block of a reaction frame;
and a second stage: steel pipe pile pulling-out device
1) Cutting all target steel pipe piles to be 20cm above the water surface by using a small pontoon capable of being tied on a hanger; the hanger is arranged on the buoyancy tank platform;
2) the center of a pulley block of a reaction frame is almost coincided with the center of a steel pipe pile to be pulled out by utilizing positioning bolts of four angular points of the double-spliced buoyancy tank and adjusting the length of a mooring rope;
3) forming 2 opposite pin holes in the top of the steel pipe pile by using a welding gun;
4) 1 steel bolt (steel pipe) is arranged between the small holes and is used as an action point of the lifting hook 4-5;
5) manually adjusting a steel wire rope 4-4 of the pulley block to couple a lifting hook 4-5 at the bottom of the pulley block with a steel bolt (steel pipe) (namely the lifting hook 4-5 hooks the steel pipe);
6) starting a winch 4-3 to move the steel pipe pile up to the highest point (until the end point of the pulley block working state);
7) cutting the steel pipe pile above the water surface by using a welding gun;
8) transferring the cut steel pipe to a small pontoon by using a small portal and a suspension cable;
9) and repeating the steps of 3-8 until the steel pipe pile is completely pulled out, and then pulling out the next steel pipe pile.
Note 1: the small pontoon can temporarily store a certain amount of cut steel pipes, and when the steel pipes are stored to reach a rated value, the steel pipes can be firstly returned to the shore side, and the steel pipes continue to be unloaded.
Note 2: the small floating pontoon has small volume and convenient movement, and the reciprocating operation area is relatively convenient and fast to land.
Claims (4)
1. A buoyancy tank platform suitable for an ultra-low clearance existing steel pipe pile clearing system is characterized by comprising a first buoyancy tank, a second buoyancy tank and a reinforcing connecting frame flat layer, wherein the reinforcing connecting frame flat layer connects top plates of the two buoyancy tanks into a whole;
the first buoyancy tank and the second buoyancy tank are arranged in parallel and are positioned on two sides of the existing steel pipe pile to be removed; each buoyancy tank is provided with a water pump; the buoyancy tank can realize elevation adjustment through water injection or drainage of the water pump;
the reinforced connecting frame flat layer comprises a connecting cross beam, a connecting longitudinal beam and a connecting stiffening rib;
the connecting cross beam is provided with a plurality of 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, and the other end of each connecting cross beam is fixed with the second buoyancy tank;
the connecting longitudinal beam is provided with a plurality of connecting longitudinal beams; each connecting longitudinal beam is arranged along the longitudinal direction of the buoyancy tank platform, each connecting longitudinal beam is formed by splicing a plurality of longitudinal beam sections, and the end part of each longitudinal beam section is fixedly connected with connecting cross beams positioned at the two ends of the longitudinal beam section;
and connecting stiffening ribs are uniformly arranged on two sides of the position where the connecting cross beam is welded and fixed with the longitudinal beam sections.
2. The pontoon platform suitable for ultra-low headroom existing steel pipe pile removal system of claim 1, wherein the pontoon is rectangular in shape, and each vertical plane of the pontoon is along the vertical stiffening rib of the vertically equispaced pontoon, along the vertical stiffening rib of the vertically equispaced pontoon.
3. The pontoon platform for ultra-low clearance existing steel pipe pile removing system according to claim 2, wherein the inner cavity of the pontoon is divided into a plurality of chambers by diaphragms uniformly distributed along the length extension direction of the pontoon.
4. The pontoon platform for the ultra-low clearance existing steel pipe pile removing system as claimed in claim 2, wherein the pontoon platform is longitudinally flanked by two locating pins; a cable is disposed on each of the pegs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202023032154.9U CN214401780U (en) | 2020-12-16 | 2020-12-16 | Buoyancy tank platform suitable for ultra-low clearance existing steel pipe pile removing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023032154.9U CN214401780U (en) | 2020-12-16 | 2020-12-16 | Buoyancy tank platform suitable for ultra-low clearance existing steel pipe pile removing system |
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| CN214401780U true CN214401780U (en) | 2021-10-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717960A (en) * | 2022-04-19 | 2022-07-08 | 湖北工业大学 | Suspension box body bearing platform foundation construction trestle and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717960A (en) * | 2022-04-19 | 2022-07-08 | 湖北工业大学 | Suspension box body bearing platform foundation construction trestle and construction method |
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