CN115258063A - Construction method for concrete pipe pile on tidal flat with rising and falling tides - Google Patents
Construction method for concrete pipe pile on tidal flat with rising and falling tides Download PDFInfo
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- CN115258063A CN115258063A CN202210520000.9A CN202210520000A CN115258063A CN 115258063 A CN115258063 A CN 115258063A CN 202210520000 A CN202210520000 A CN 202210520000A CN 115258063 A CN115258063 A CN 115258063A
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- 239000004567 concrete Substances 0.000 title claims abstract description 77
- 238000010276 construction Methods 0.000 title claims abstract description 73
- 230000000630 rising effect Effects 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000013535 sea water Substances 0.000 claims description 37
- 238000004873 anchoring Methods 0.000 claims description 8
- 238000013016 damping Methods 0.000 abstract 1
- 238000005562 fading Methods 0.000 abstract 1
- 230000008961 swelling Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/003—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for for transporting very large loads, e.g. offshore structure modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/28—Barges or lighters
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02C—SHIP-LIFTING DEVICES OR MECHANISMS
- E02C1/00—Locks or dry-docks; Shaft locks, i.e. locks of which one front side is formed by a solid wall with an opening in the lower part through which the ships pass
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02C—SHIP-LIFTING DEVICES OR MECHANISMS
- E02C1/00—Locks or dry-docks; Shaft locks, i.e. locks of which one front side is formed by a solid wall with an opening in the lower part through which the ships pass
- E02C1/06—Devices for filling or emptying locks
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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
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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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
Abstract
The invention discloses a construction method of a concrete pipe pile on a tidal rising and going-out beach, which comprises the steps of providing a pipe pile transportation device for the tidal rising and going-out beach, wherein the pipe pile transportation device for the tidal rising and going-out beach comprises a ship body with adjustable weight, a traction steel wire rope and a secondary traction winch, wherein the ship body is provided with a main traction winch; the device also comprises a barge for carrying the concrete pipe pile, and the barge is connected to the traction steel wire rope; the adjustable weight hull is fixed and moved at the outer boundary of the designed beach to realize the construction of the barge for transportation and piling on the piling line. The long-distance, high-efficiency and low-cost transportation of the large-volume and large-weight concrete pipe pile without the influence of swelling and damping is realized. Compared with a construction method for hauling concrete pipe piles by a ship-shaped excavator, the operation cost of the method is low, the efficiency is high, the method can be used for gridding and simultaneously operating in a large-area operation field, is not influenced by rising and fading tide, and can greatly improve the construction progress.
Description
Technical Field
The invention relates to the technical field of hydroelectric engineering construction, relates to concrete pipe pile transportation and piling for photovoltaic power generation on a rising and falling tide mudflat, and particularly relates to a construction method of a concrete pipe pile for photovoltaic power generation on a rising and falling tide mudflat.
Background
According to the national policy of energy conservation and emission reduction for coping with climate change and the arrangement of national adjustment on energy structures, a large number of coastal mudflat investment and construction photovoltaic power generation projects will exist in the future, by taking the long-and-long mudflat photovoltaic project in Xiangshan county of Zhejiang province as an example, the project is located in the west coastal mudflat zone of the rural yarn cap green village in Nippon county of Zhejiang province, the total installed capacity of the project is 300MWP, the main infrastructure of the project construction is to bury 10 thousands of concrete pipe piles, and a solar photovoltaic support and a daylighting panel are installed on the upper portions of the concrete pipe piles.
In the existing construction method, a barge is used for loading the concrete pipe pile, and then the concrete pipe pile is transported to a concrete pipe pile installation site by the transportation on the beach through the barge. The specification of the barge is as follows: the length is 8m, the width is 3m, the height is 1.2m, the specification of the concrete pipe pile is phi 300-400 mm, the length is 12-14 m, the wall thickness is about 100mm, and the weight is about 2.3-3.1 t.
Due to the natural law of rising and falling tide on the beach, the pipe pile can be transported by a barge during rising and falling tide. After ebb tide, the depth of the beach sludge reaches more than 10 meters, the barge is difficult to walk in the sludge, a river channel with proper depth and width is dug in the sludge to move forward by the aid of an excavating arm, and the walking speed is extremely low. The conventional construction method at present is that 6 pipe piles are conveyed each time by dragging a barge through a ship or a boat-type excavator (the barge is an unpowered pontoon) when the tide rises, and small canals which are criss-cross are dug through digging arms in a wide beach when the tide falls, so that the barge can pass in the small canals. And the construction method of digging a large number of river channels in the beach for barge to pass is adopted during the ebb tide, so that the construction method has the advantages of large workload, low efficiency and high cost, and further causes the quality problems of difficult piling, pile foundation stability and the like caused by uneven beach surface.
Another transportation mode for the beach with tide rising and ebb is that a cofferdam is built along the photovoltaic construction outer boundary line of the beach, so that the water level in the cofferdam is always kept at a certain depth without being influenced by the tide rising and ebb, and the barge can float on the water surface and pass. Because the silt is deep and the rising and falling tide water level at the position of 800m away from the coast of the beach usually reaches about 3m, the construction of a long cofferdam dam (for example, the construction of a cofferdam with 7KM is required for a long shoal in Xiangshan county in Zhejiang province) under the condition is difficult, the construction period is long, and the cost is increased.
Therefore, the two methods are not available, and the problem of how to efficiently and inexpensively transport the concrete pipe pile to the installation site of the concrete pipe pile on the tidal flat under the condition of not changing the existing tidal flat condition and the rising and falling tide is the main problem to be solved in the construction of the coastal tidal flat photovoltaic power generation project.
Disclosure of Invention
The invention provides a construction method of a concrete pipe pile on a tidal flat to solve the problems in the prior art.
A construction method for concrete pipe piles on a tidal flat of rising and falling provides a pipe pile transportation device for the tidal flat of rising and falling, wherein the pipe pile transportation device for the tidal flat of rising and falling comprises a weight-adjustable ship body provided with a main traction winch, a traction steel wire rope and a secondary traction winch, and the traction steel wire rope is connected with the main traction winch and the secondary traction winch; the device also comprises a barge for carrying the concrete pipe pile, and the barge is connected to the traction steel wire rope; the method comprises the following steps:
s1, determining the mudflat outer boundary of a concrete pipe pile construction area and a single piling line according to the pile position design requirement of the concrete pipe pile in the construction requirement; determining a fixed point of a secondary traction winch on the coast and fixing the secondary traction winch and a fixed point at the outer boundary of the mudflat according to a single piling line;
s2, when the sea water rises tide, the weight of the weight-adjustable ship body is reduced to the extent that the weight-adjustable ship body floats in the sea water, and the weight-adjustable ship body sails to a fixed point at the outer boundary of the tidal flat;
s3, after the weight-adjustable ship body is fixed through anchoring, increasing the weight of the weight-adjustable ship body until the weight-adjustable ship body contacts the beach at the outer boundary of the beach and is fixed at a fixed point at the outer boundary of the beach;
s4, starting a secondary traction winch, dragging the no-load barge connected to the traction steel wire rope to a coast, and transferring the concrete pipe pile to a barge;
s5, starting a main traction winch, and pulling the barge loaded with the concrete pipe pile to a pile driving pile position on a single pile driving line for pile driving until the concrete pipe pile on the barge is completely driven;
s6, repeating S4 and S5 until all pile positions on the single piling line are piled;
s7, reducing the weight of the weight-adjustable ship body to float on the sea surface, and then removing the anchor;
s8, sailing the ship body with the adjustable weight to a fixed point at the outer boundary of the beach of the next single piling line;
s9, after the weight-adjustable ship body is fixed through anchoring, the weight of the weight-adjustable ship body is increased until the weight-adjustable ship body contacts a fixed point at the outer boundary of a beach, and the weight-adjustable ship body is fixed at a fixed point at the outer boundary of the beach of the next single piling line;
s10, fixing a coast fixed point of the secondary traction winch which is correspondingly sent to the next single piling line;
s11, repeating S4-S6;
and S12, repeating S7-S11 until the concrete pipe pile construction in the concrete pipe pile construction area is completely finished.
The further technical scheme is as follows: the weight-adjustable ship body is a ship body with a large-volume cabin body, an opening is formed in the cabin body of the ship body, and a gate valve is arranged in the opening; in the steps S1-S12, the gate valve is opened, so that seawater enters the cabin body of the ship body through the opening to increase the weight of the ship body, and the gate valve is closed after the ship body is settled and fixed to a fixed point at the outer boundary of the tidal flat; in the steps S1-S12, the gate valve is opened, so that the seawater in the bin body flows out of the ship body through the opening to reduce the weight of the ship body, and the gate valve is closed after the ship body floats in the seawater or the seawater in the bin body is completely discharged.
The further technical scheme is as follows: the empty weight of the ship body is 300-500 tons, and the full weight of the ship body is more than or equal to 1000 tons.
The further technical scheme is as follows: the length of the ship body is 50-60 meters.
The further technical scheme is as follows: the main traction winches, the secondary traction winches, the barge and the traction steel wire ropes are respectively arranged in two groups, and the main traction winches are respectively arranged at two ends of the ship body; in steps S1 to S12, each single piling line can carry and pile two groups of concrete pipe piles simultaneously.
The further technical scheme is as follows: and a plurality of barges are connected to the traction steel wire rope, and in the step S4, the barges are dragged to a plurality of pile driving pile positions on the single pile driving line for pile driving.
The further technical scheme is as follows: the barge loading capacity is 6 concrete pipe piles.
The further technical scheme is as follows: the barge is fixedly connected to the traction steel wire rope through a barge connecting rope, and the length of the barge connecting rope is adjustable.
The further technical scheme is as follows: in step S8, the hull is sailed to a fixed point at the outer boundary of the beach of the next single piling route at the time of tide rise.
The further technical scheme is as follows: seawater enters a hull cabin body to increase the weight of the hull when the tide rises; seawater is discharged out of the hull cabin body to reduce the weight of the hull when the tide falls.
The invention has the beneficial effects that:
the invention provides a construction method of a concrete pipe pile on a tidal flat with rising and falling tides, which utilizes a weight-adjustable ship body as a movable fixing piece, skillfully combines the sea water tide law and water level change to realize the mechanized transportation of the concrete pipe pile, and realizes the long-distance, high-efficiency and low-cost transportation of the large-volume and heavy-weight concrete pipe pile without being influenced by the rising and falling tides under the condition of not changing the existing tidal flat condition. Compared with the construction method for hauling the concrete pipe pile by the ship-shaped excavator, the operation cost of the method is low, the efficiency is high, the method can be used for gridding and simultaneously operating in a large-area operation field, is not influenced by the rising and falling tide, and can greatly improve the construction progress. In addition, the construction method can not damage the mudflat, thereby avoiding the conditions that the piling difficulty on the mudflat is increased and the piled foundation is unstable, and effectively improving the piling efficiency and the piling quality.
Drawings
Fig. 1 is a schematic structural diagram of a pipe pile conveying device for the tidal flat of the rising tide and the receding tide in the invention;
figure 2 is a side view of the hull and the winch structure located thereon in a fixed condition;
figure 3 is a top view of the hull and the winch arrangement thereon in a fixed condition;
FIG. 4 is a schematic view of the transportation of the present invention in flood tide conditions;
FIG. 5 is a schematic view of the present invention in transport in a fallen tide condition;
FIG. 6 is a schematic view of the hull in a floating condition;
FIG. 7 is a schematic view of a construction range according to an embodiment of the present invention;
fig. 8 is a schematic diagram of pile foundation arrangement in the construction area # 21 in fig. 7.
In the figure:
10. the marine floating type ship comprises a ship body, 11, a gate valve, 12, a main traction winch, 13, a cabin body, 14, seawater, 3, a traction steel wire rope, 4, a secondary traction winch, 6, a barge, 61, a barge connecting rope, 7, a concrete pipe pile, 71, an installed concrete pipe pile, 9, a beach, 91, a flood tide water level, 92, a tide falling water level, 8, a coast, 21# areas, 22 and a pile foundation.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
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, when appearing in the orientation or positional relationship indicated in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.
As shown in fig. 1-5, the tubular pile transportation device for tidal flat comprises a weight-adjustable hull, wherein a main traction winch 12 is arranged on the weight-adjustable hull; the device also comprises a traction steel wire rope 3 and a secondary traction winch 4, wherein the traction steel wire rope 3 is connected with a main traction winch 12 and the secondary traction winch 4; the device also comprises a barge 6, and the barge 6 is connected to a traction steel wire rope 4 between a main traction winch 12 and a secondary traction winch 4. The secondary traction hoist 4 is arranged on the coast 8, the barge 6 is moved from the coast 8 to the adjustable weight hull by the traction of the primary traction hoist 3, and when the concrete pipe pile 7 is carried on the barge 6, the concrete pipe pile 7 can be transported to any position between the coast and the adjustable weight hull. After the concrete pipe piles are unloaded on the barge, the barge is pulled to the coast by a secondary traction winch on the coast to carry out the next loading of the concrete pipe piles. Thus, the transportation is carried back and forth.
In the invention, the weight-adjustable ship body is fixed at the outer boundary of the tidal flat as an anchoring point, and the weight-adjustable ship body is used as a fixing piece, so that the weight of the weight-adjustable ship body is heavy, and the weight-adjustable ship body can be fixed at the anchoring point no matter the sea water rises or falls. For example, photovoltaic construction needs to be performed on a beach, a solar photovoltaic support and a daylighting panel are installed, and a weight-adjustable ship body is arranged at the outermost boundary of the photovoltaic construction to serve as a fixing piece. And a main traction winch is arranged on the fixed weight-adjustable ship body, and a secondary traction winch is arranged on the coast and is matched with a traction barge to move between the weight-adjustable ship body and the coast to convey the concrete pipe piles. In addition, the photovoltaic construction area on the whole beach is very large, that is, the beach construction outer boundary is very long, and the adjustable weight hull is used as a fixing piece to realize the anchoring of the adjustable weight hull at a certain position of the beach construction outer boundary and finish the transportation and piling of the concrete pipe pile, and then the adjustable weight hull needs to be moved to the next anchoring point of the beach construction outer boundary and used as a fixing piece to transport the concrete pipe pile, and when the adjustable weight hull moves to a position. The weight of the ship body needs to be adjustable, the ship body can float on the sea surface, and the ship body is convenient to move. Therefore, one embodiment of the present invention is to adopt a structure having a large-volume cavity and adjust the weight by how much the volume of the cavity is filled. In some embodiments, a box, hull, or the like, having a large volume cartridge body can be selected. In a specific embodiment, the hull with adjustable weight is a hull 10 with a large volume of tanks 13, the hull is provided with openings (not shown) at the tanks 13, the openings are provided with gate valves 11, as shown in fig. 2 and 3. In some preferred embodiments, the gate valve 11 opens or closes the opening to fill the seawater 14 into the cabin 13 or discharge the seawater to change the weight of the ship 10. In some preferred embodiments, the opening and gate valve are provided in the lower side wall of the hull. In other embodiments, the openings and the gate valves are arranged on the ship body in two groups, one group is arranged on the side wall of the lower part of the ship body, and the other group is arranged on the side wall of the upper part of the ship body, so that seawater can be conveniently filled and drained. According to the invention, through the adjustment of the opening and the gate valve, the weight of the ship body is 300-500 tons when the ship body is empty, and the weight of the ship body is more than or equal to 1000 tons when the ship body is full.
The main traction winch 12 is located on the upper surface of the hull 10. In some embodiments, the length of the hull 10 is 50-60 meters, two main traction winches are arranged on the hull and respectively arranged at two ends of the barge, and two sets of secondary traction winches, the barge and the traction steel wire rope are matched with the two main traction winches, so that the two barges can be transported simultaneously.
In some preferred embodiments, the hull 10 is positioned as a fixture at the outer boundary of the beach construction and has a height of 3m or more in order to expose the upper surface of the hull to the sea level. For example, the height of the hull is 3-15 meters, specifically, 3 meters, 4 meters, 5 meters, 6 meters, 8 meters, 10 meters, and the like.
The barge 6 is fixedly connected to the traction steel wire rope 3 through a barge connection rope 61, and the length of the barge connection rope is adjustable and is used for adapting to the situation that the barge runs on the sea surface of a rising tide or runs on a mud flat after a falling tide. The length of barge attachment line adjustment is usually determined by the elevation and subsidence of the beach plus the height of the heaving tide. For example, in some embodiments, the length of the barge attachment lines can be adjusted by 3-5 meters. As shown in fig. 4, in the flood tide state, the flood tide water level 91 is much higher than the beach tidal flat 9, so that the barge 6 loaded with the concrete pipe pile floats on the sea surface, the bottom of the barge does not contact the beach tidal flat 9, the distance between the horizontal plane of the barge 6 and the horizontal plane of the traction steel wire rope 3 is small, and the barge connecting rope 61 is relatively short. As shown in fig. 5, when the barge is in a falling tide, the water level 92 of the falling tide is not much higher than the beach 9, even the whole beach part, and at this time, the bottom of the barge 6 is mostly contacted with the beach 9 (of course, the bottom of the barge is not contacted with the beach), the distance between the level of the barge 6 and the level of the towing steel wire 61 is larger, and the barge connecting rope 61 is relatively longer.
In order to improve the transportation capacity, a plurality of barges 6 can be mounted on the traction steel wire rope 3 at one time, and the plurality of barges 6 are simultaneously dragged back and forth by the main traction winch and the secondary traction winch. The barge 6 can be unhooked and stopped at the pile position design point after being pulled to the pile position design point, and the empty barge is pulled back to the pile carrying wharf for turnover transportation after the pile driver finishes driving the concrete pipe pile on the barge.
The concrete pipe pile construction method on the tidal flat will be described in detail with reference to fig. 1-6 and the pipe pile transportation device for tidal flat.
S1, determining the mudflat outer boundary of a concrete pipe pile construction area and a single piling line according to the pile position design requirement of the concrete pipe pile in the construction requirement; determining a fixed point of a secondary traction winch on the coast and fixing the secondary traction winch and a fixed point at the outer boundary of the mudflat according to a single piling line;
s2, reducing the weight of the ship body with the large cabin body to the weight-adjustable ship body floating in the seawater, namely: opening a gate valve connected to the opening of the ship body, so that the seawater in the bin body flows out of the ship body through the opening until the ship body floats in the seawater or the seawater in the bin body is completely discharged, and then closing the gate valve; sailing the ship body to a fixed point at the outer boundary of the tidal flat when the sea water rises tide;
s3, after the ship body is anchored and fixed, the gate valve is opened, seawater enters the cabin body of the ship body through the opening to increase the weight of the ship body, and after the ship body is settled and fixed to a fixed point at the outer boundary of the tidal flat, the ship body is in contact with the tidal flat at the outer boundary of the tidal flat and is fixed to the fixed point at the outer boundary of the tidal flat, and the gate valve is closed;
s4, starting a secondary traction winch, drawing one or more unloaded barges connected to the traction steel wire rope to a coast, and transferring the concrete pipe piles to the barges;
s5, starting a main traction winch, and pulling the barge to a pile driving position on a single pile driving line to drive the pile until all the concrete pipe piles on the barge are driven;
s6, repeating S4 and S5 until all pile positions on the single piling line are piled;
s7, opening the gate valve to enable seawater in the bin body to flow out of the ship body through the opening to reduce the weight of the ship body, and closing the gate valve after the ship body floats and seawater or seawater in the bin body is completely discharged (shown in figure 6); removing the anchor;
s8, sailing the ship body to a fixed point at the outer boundary of the beach of the next single piling line;
s9, after the ship body is anchored and fixed, opening a gate valve to enable seawater to enter a cabin body of the ship body through an opening to increase the weight of the ship body, and closing the gate valve after the ship body is settled and fixed to a fixed point at the outer boundary of the tidal flat;
s10, fixing a coast fixed point of the secondary traction winch which is correspondingly sent to the next single piling line;
s11, repeating S4-S6;
and S12, repeating S7-S11 until the concrete pipe pile construction in the concrete pipe pile construction area is completely finished.
In the construction method, when a plurality of barges are connected to the traction steel wire rope, the plurality of barges are dragged to a plurality of pile driving pile positions on a single pile driving line for pile driving.
In the construction method, the loading capacity of the barge is 6 concrete pipe piles.
In the construction method, the barge is fixedly connected to the traction steel wire rope through the barge connecting rope, and the length of the barge connecting rope can be adjusted according to the rising tide and falling tide of seawater, so that the barge can float on the sea or contact with the beach and beach.
In the above construction method, in step S8, the hull may be navigated to a fixed point at the outer boundary of the mudflat of the next single piling route at the time of the flood tide.
In the construction method, in order to increase the efficiency of seawater entering and exiting the cabin body, the seawater entering the cabin body of the ship body can increase the weight of the ship body when the tide rises; the seawater is discharged out of the hull cabin body to reduce the weight of the hull, and the seawater can be discharged out of the hull cabin body when the tide falls.
Taking the Zhejiang Xiangshan growing-up beach photovoltaic project as an example, a photovoltaic factory area to be constructed is positioned on the west side of the rural long shoal sea pond of the high pond island in Xiangshan county where the project is located, the whole beach field is flat and smooth, no high large building is arranged around the field temporarily, and the field is open. The construction coverage range is 4516 mu in total, the length of the beach coastline is about 5.6km, and as shown in figure 7, the construction range is extremely large. During construction, the whole construction range is divided into 75 areas (shown in fig. 7) with different sizes, and concrete pipe pile piling construction is respectively carried out, wherein fig. 8 is a schematic layout diagram of the pipe pile foundations 22 in the 21# area 21 in fig. 7. The prestressed concrete pipe pile used for the whole photovoltaic plant construction is PHC400-95-AB type, the length is divided into 12 m and 14m, and the total amount of the concrete pipe pile is about 13 ten thousand meters, namely 10 ten thousand of concrete pipe piles. Wherein the wall thickness of each concrete pipe pile is about 95mm, and the weight is about 3.0t. Due to the fact that the project is short in construction period and large in construction engineering quantity, pile conveying difficulty on the mudflat is high, safety risk is high, and particularly rising and rising tide removing time each day is indefinite. In view of the above situation, the construction method for transporting the concrete pipe piles on the tidal flat of the rising tide and the receding tide is used for the project, so that the construction safety is ensured, the speed of transporting the piles is increased, the progress meets the project construction period requirement, and the construction economic benefit and the social benefit of more than 10 thousands of concrete pipe piles are remarkable.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify equivalent embodiments using the teachings disclosed above, without departing from the scope of the solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention, unless the technical essence of the present invention departs from the content of the technical solution of the present invention.
Claims (10)
1. A construction method for concrete pipe piles on a tidal flat is characterized in that a pipe pile conveying device for the tidal flat is provided, and comprises a weight-adjustable ship body provided with a main traction winch, a traction steel wire rope and a secondary traction winch, wherein the traction steel wire rope is connected with the main traction winch and the secondary traction winch; the device also comprises a barge for carrying the concrete pipe pile, and the barge is connected to the traction steel wire rope; the method comprises the following steps:
s1, determining the mudflat outer boundary of a concrete pipe pile construction area and a single piling line according to the pile position design requirement of the concrete pipe pile in the construction requirement; determining a fixed point of a secondary traction winch on the coast and fixing the secondary traction winch and a fixed point at the outer boundary of the mudflat according to a single piling line;
s2, when the sea water rises tide, the weight of the weight-adjustable ship body is reduced to the extent that the weight-adjustable ship body floats in the sea water, and the weight-adjustable ship body sails to a fixed point at the outer boundary of the tidal flat;
s3, after the weight-adjustable ship body is fixed through anchoring, increasing the weight of the weight-adjustable ship body until the weight-adjustable ship body contacts the mudflat at the outer boundary of the mudflat and is fixed at a fixed point at the outer boundary of the mudflat;
s4, starting a secondary traction winch, drawing the no-load barge connected to the traction steel wire rope to a coast, and transferring the concrete pipe pile to a barge;
s5, starting a main traction winch, and pulling the barge loaded with the concrete pipe pile to a pile driving pile position on a single pile driving line for pile driving until the concrete pipe pile on the barge is completely driven;
s6, repeating S4 and S5 until all pile positions on the single piling line are piled;
s7, reducing the weight of the weight-adjustable ship body to float on the sea surface, and then removing the anchor;
s8, sailing the weight-adjustable ship body to a fixed point at the outer boundary of the beach of the next single piling line;
s9, after the weight-adjustable ship body is fixed through anchoring, increasing the weight of the weight-adjustable ship body until the weight-adjustable ship body contacts a fixed point of the outer boundary of a tidal flat, and fixing the weight-adjustable ship body at the fixed point of the outer boundary of the tidal flat of the next single piling line;
s10, fixing a coast fixed point of the secondary traction winch which is correspondingly sent to the next single piling line;
s11, repeating S4-S6;
and S12, repeating S7-S11 until the concrete pipe pile construction in the concrete pipe pile construction area is completely finished.
2. The construction method of the concrete pipe pile on the tidal flat of claim 1, wherein the weight-adjustable hull is a hull with a large-volume cabin, the hull is provided with an opening at the cabin, and the opening is provided with a gate valve; in the steps S1-S12, the gate valve is opened, so that seawater enters the cabin body of the ship body through the opening to increase the weight of the ship body, and the gate valve is closed after the ship body is settled and fixed to a fixed point at the outer boundary of the tidal flat; in the steps S1-S12, the gate valve is opened, so that the seawater in the bin body flows out of the ship body through the opening to reduce the weight of the ship body, and the gate valve is closed after the ship body floats in the seawater or the seawater in the bin body is completely discharged.
3. The construction method of the concrete pipe pile on the tidal flat of the rising tide and the receding tide as claimed in claim 2, wherein the empty weight of the ship body is 300-500 tons, and the full weight of the ship body is greater than or equal to 1000 tons.
4. The construction method of the concrete pipe pile on the tidal flat of claim 2, wherein the length of the ship body is 50-60 m.
5. The construction method of the concrete pipe pile on the tidal flat of the rising tide and the retreating tide as claimed in claim 2, characterized in that, two groups of the main traction winch, the secondary traction winch, the barge and the traction steel wire rope are provided, and the main traction winch is respectively arranged at two ends of the ship body; in steps S1 to S12, each single piling line can carry and pile two groups of concrete pipe piles simultaneously.
6. The method for constructing the concrete pipe pile on the tidal flat according to claim 1 or 5, wherein a plurality of barges are connected to the hauling cable, and in step S5, the plurality of barges are hauled to a plurality of pile driving positions on a single pile driving line for pile driving.
7. The construction method of the concrete pipe pile on the tidal flat of the rising tide and the receding tide as claimed in claim 1, wherein the loading capacity of the barge is 6 concrete pipe piles.
8. The construction method of the concrete pipe pile on the tidal flat of the rising tide and the retreating tide as claimed in claim 1, wherein a barge is fixedly connected to the traction steel wire rope through a barge connecting rope, and the length of the barge connecting rope is adjustable.
9. The construction method of the concrete pipe pile on the tidal flat according to claim 2, wherein in step S8, the hull is sailed to a fixed point at the outer boundary of the tidal flat of the next single piling line at the time of the tidal flat.
10. The construction method of the concrete pipe pile on the tidal flat according to claim 2, wherein seawater enters the cabin body of the ship body to increase the weight of the ship body when the tide rises; seawater is discharged out of the hull cabin body to reduce the weight of the hull when the tide falls.
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