CN108708374B - Removable pile casing and method for construction of cast-in-place piles in water - Google Patents

Abstract

The invention relates to a removable pile casing, which is used for construction of a concrete filling pile in water, and comprises one or more sections of common pile casings; the common protection cylinder at the bottommost part is a bottom protection cylinder; the diameter and the structure of the common pile casing and the bottom section pile casing are the same; the bottom section protection cylinder and the common protection cylinder are composed of an upper flange piece, a lower flange piece and a cylinder body; the upper flange piece is connected to the top of the cylinder body, and the lower flange piece is connected to the bottom of the cylinder body. And the method comprises the steps of detaching the pile casing and not detaching the pile casing to form the pile casing, and constructing the concrete filling pile in the water by using the pile casing. The pile casing and the construction method of the concrete filling pile using the pile casing realize the operation and disassembly on the water surface of the pile casing in the water area and the turnover use. The manufacturing cost of the protective cylinder is slightly higher than that of the traditional non-dismantling treatment, but the protective cylinder can be repeatedly used for a plurality of times, so that the use cost is very low, the dismantling cost is low without underwater operation, and the economic benefit and the safety are extremely high.

Description

Removable pile casing and method for construction of cast-in-place piles in water

Technical Field

The invention belongs to the field of civil engineering construction, and relates to a pile casing for construction of a concrete filling pile in a water area, in particular to a pile casing for construction of a concrete filling pile in a water area and a manufacturing, using, dismantling and repeated turnover method thereof.

Background

In cast-in-situ bored pile construction, a casing is indispensable. The pile casing is buried to maintain the stability of soil in the hole mouth of the pile hole, and besides, the pile casing has the functions of positioning, keeping the mud surface in the hole higher than the water level outside the hole, and the like. The casing is usually made of steel. When the pile casing is positioned, firstly, the pile position center is used as the circle center, the position of the pile casing is determined on the soil according to the radius of the pile casing, and after the pile casing is positioned, the pile casing is buried into the soil by applying pressure to a certain depth. And checking whether the pile casing is vertical or not in the embedding process, and correcting in time if the pile casing is found to be deviated. The pile casing has the main functions in the construction of the filling pile: 1. positioning; 2. protecting the stability of the soil body of the orifice; 3. maintaining the slurry surface in the hole to be higher than the water level outside the hole, generating lateral pressure, and preventing the hole from collapsing; 4. can be used as one of the control bases of pile top elevation.

The requirement for the protective cylinder is to have certain strength, rigidity and tightness, the former can prevent deformation in use, and the latter can play a role in maintaining the liquid level in the cylinder to be higher than the water level outside the cylinder. After the land pile casing is buried in place, the outside of the pile casing is backfilled and compacted by clay so as to prevent the water leakage phenomenon around the pile casing. And taking out the pile casing for turnover use after the construction of the cast-in-place pile is completed.

And when the concrete filling pile is constructed in the water area, the traditional method for protecting the pile casing is as follows: 1. after the cast-in-place pile is constructed, the pile casing is kept and is not removed, so that the construction cost is increased; 2. the pile casing is designed into two-piece combined pile casing, and is connected by high-strength bolts, and underwater operation is carried out by divers to remove when the cast-in-place pile construction is completed. The two-piece integrated design causes great friction force caused by the lateral pressure of concrete in the use of the protective cylinder, so that the dismantling work is laborious, and meanwhile, the safety of the dismantling work performed under water by a diver is low, and the cost is high.

Disclosure of Invention

The invention realizes the dismantling of the protective cylinder positioned above the river (sea) bottom in the water area by the multi-section protective cylinder which is split into the detachable protective cylinder formed by assembling a plurality of sections, and the invention is convenient, quick and safe and has adjustable length. Under the construction requirements of being fit for different water depths and pile diameters, the efficiency of installing and dismantling the pile casing for the construction of the concrete filling pile in the water area is greatly improved, the turnover use of the pile casing is realized, the whole construction speed is accelerated, and the construction cost is reduced.

Specifically, the invention provides a removable pile casing for construction of a concrete cast-in-place pile in water, wherein the removable pile casing comprises one or more sections of common pile casings; the common protection cylinder at the bottommost part is a bottom protection cylinder; the diameter and the structure of the common pile casing and the bottom section pile casing are the same; the bottom section protection cylinder and the common protection cylinder are composed of an upper flange piece, a lower flange piece and a cylinder body; the upper flange piece is connected to the top of the cylinder body, and the lower flange piece is connected to the bottom of the cylinder body.

In some preferred embodiments, the base section casing and the common casing are the same or different in length.

In some preferred embodiments, the body of each base section casing and the body of the common casing are formed by circumferentially combining a plurality of arc-shaped casing pieces.

In some preferred embodiments, the arcuate barrel pieces encircling each barrel are 3 or 4 pieces.

In some preferred embodiments, two sides of each arc-shaped barrel piece are respectively provided with a barrel piece connecting plate; a row of slotted holes are formed on one side edge of the barrel piece connecting plate, and a row of round holes are formed on the other side edge of the barrel piece connecting plate; the slot hole corresponds to the center of the round hole; the adjacent arc-shaped barrel pieces are fixedly connected through a row of barrel piece locking devices arranged on round holes of the barrel piece connecting plates; an I-shaped sealing gasket is clamped between two adjacent barrel connecting plates.

In some preferred embodiments, the array of blade locking means disposed on the blade attachment plate comprises at least two blade locking means.

In some preferred embodiments, the height of the I-shaped sealing gasket is the same as that of the casing body, and two ends of the gasket are respectively provided with a cylinder.

In some preferred embodiments, at least one lifting lug is arranged on each arc-shaped barrel piece of the bottom section protection barrel and the common protection barrel body.

In some preferred embodiments, the side walls of the bottom section pile casing and the common pile casing body are provided with pull rod supports and rotating rod supports.

In some preferred embodiments, a P joint annular sealing gasket is arranged between the bottom joint casing and the common casing and between the common casing and the common casing; the bottom section protective cylinder is connected and fixed with the common protective cylinder through bolts.

In some preferred embodiments, the P joint annular sealing gasket is divided into a plurality of pieces along the circumference in a dividing way, and the joints of the pieces are made into P shapes; the plurality of P joint annular sealing gaskets correspond to the arc-shaped barrel pieces.

In some preferred embodiments, the removable cartridge guard further comprises a pull rod and a rotating rod, respectively supported on the pull rod bracket and the rotating rod bracket.

In some preferred embodiments, the pull rod and the rotating rod are of a segmented connection structure, the length of each segment of the pull rod and the length of the rotating rod are the same as the height of the protective cylinder, and the pull rod is connected with the cylinder piece locking device through a traction rope which is tied on the pull rod; the tail end of the rotating rod is connected with the flange locking device through a traction rope which is tied on the rotating rod.

In some preferred embodiments, the barrel locking device comprises a T-shaped lock shaft, a spring, a rotating handle and a nut, wherein one end of the T-shaped lock shaft is provided with a protruding T-shaped head, the other end of the T-shaped lock shaft is provided with a thread section at the extreme end, and the position close to the thread section is a square section. A nut is connected to the threaded section; the square section is connected with the rotating handle; the spring is located between the T-head and the stem. The rotary handle is connected with a traction rope, the traction rope is connected to the pull rod at the same time, and the traction rope and the rotary handle connected with the traction rope are driven to bear force by pulling up the pull rod, so that the remote opening of the barrel locking device is realized.

In some preferred embodiments, when installing the cartridge locking means, flange locking means is difficult, a hold down tool may be used to assist in the installation.

The invention also provides a pile casing for construction of a concrete cast-in-place pile in water, which comprises a non-removable pile casing and a removable pile casing according to the invention.

In some preferred embodiments, the non-removable cartridge comprises a body and a top flange piece attached to the top of the body; a P joint annular sealing gasket is arranged between the lower flange piece of the detachable protective cylinder bottom section protective cylinder and the top flange piece of the non-detachable protective cylinder, and the lower flange piece of the detachable protective cylinder bottom section protective cylinder and the top flange piece of the non-detachable protective cylinder are locked and fixed by a flange locking device.

In some preferred embodiments, the flange locking means comprises a T-shaped lock shaft, a spring, a stem, a nut, all located on the lock shaft. One end of the T-shaped lock shaft is provided with a protruding T-shaped head, the extreme end of the other end is provided with a threaded section, and the position close to the threaded section is a square section. A nut is connected to the threaded section; the square section is connected with the rotating handle; the spring is located between the T-head and the stem. The rotating handle is connected with a traction rope, the traction rope is connected to the rotating rod at the same time, and the traction rope and the rotating handle connected with the traction rope are driven to rotate through rotation of the rotating rod, so that the flange locking device is remotely opened.

On the other hand, the invention also provides a method for constructing the concrete filling pile in the water area by using the pile casing, wherein the method comprises the pile casing, the pile casing comprises a non-dismantling pile casing and a detachable pile casing, and a top flange piece is arranged at the top of the non-dismantling pile casing; the removable casing comprises one or more sections of common casing; the method comprises the following specific steps:

1. and (3) mounting a protective cylinder:

(1) Calculating the total length of the detachable pile casing section according to the depth of the construction water area and the construction parameters, and selecting common pile casings with different lengths to splice the total length;

(2) Assembling the protective cylinder, and assembling the selected common protective cylinder into a detachable protective cylinder; wherein, the section at the lowest part is called a bottom section casing; the bottom section protective cylinder and the common protective cylinder are both composed of an upper flange piece, a lower flange piece and a cylinder body; the bottom section protective cylinder and the cylinder body of the common protective cylinder are formed by encircling 3 or 4 arc cylinder pieces; the arc-shaped barrel pieces are connected through a barrel piece connecting plate, sealed through an I-shaped sealing gasket and locked through a barrel piece locking device; the section protection cylinder is connected with the common protection cylinder through an upper flange piece and a lower flange piece, is sealed through a P joint annular sealing gasket and is connected through bolts; if the removable cartridge is longer in overall length, it can be assembled in sections: one or more sections of common protection barrels are assembled into a lower section protection barrel, and other sections of common protection barrels are assembled into one or more sections of upper section protection barrels;

(3) Inserting and beating the non-dismantling pile casing to a preset position, and after installing a top flange sheet and a P joint annular sealing gasket at the top of the non-dismantling pile casing, locking the lower flange sheet of the lower pile casing or the lower joint pile casing with the top flange sheet of the non-dismantling pile casing by using a flange locking device; a pull rod of a barrel piece locking device, a pull rod of a flange locking device and a pull rope are arranged on a pull rod bracket and a pull rod bracket of the barrel body;

(4) Driving the locked non-removable casing and removable casing or lower casing down to a predetermined depth;

(5) If the upper section pile casing is arranged, a P joint annular sealing gasket is arranged on the top of the lower section pile casing, the upper section pile casing is arranged and fixedly connected through bolts and flanges, a rotating rod of a flange locking device is additionally connected, a pull rod of a barrel piece locking device is additionally connected, and a pull rope of the pull rod and the rotating handle is arranged; driving the casing downward to a predetermined depth;

(6) Repeating the step (5) until the whole installation of the protective cylinder is completed;

2. carrying out concrete pouring construction;

3. and (5) removing the protective cylinder:

(1) After the pouring of the concrete cast-in-place pile is completed and the strength is reached, a lifting wire rope is used for tying the lifting lug of each arc-shaped barrel piece of the uppermost section of common pile casing; the method comprises the steps of carrying out a first treatment on the surface of the

(2) Rotating a rotating rod of the flange locking device to enable the lock shaft to rotate to an open state, so that the detachable protective cylinder and the undetachable protective cylinder are in a detachable state;

(3) Pulling up a pull rod of the barrel piece locking device to enable the lock shaft to rotate to an open state, wherein adjacent barrel pieces of the detachable protective barrel are in a separable state;

(4) The hoisting steel wire rope is tightened, and each barrel piece of the removable protective barrel is lifted off the water body and is transferred to a preset place;

(5) And (5) finishing the detachment of the protective cylinder.

In some preferred embodiments, when installing the cartridge locking means, flange locking means is difficult, a hold down tool may be used to assist in the installation.

Advantageous effects

The pile casing and the construction method of the concrete filling pile using the pile casing realize the operation and disassembly on the water surface of the pile casing in the water area and the turnover use. The manufacturing cost of the protective cylinder is slightly higher than that of the traditional non-dismantling treatment, but the protective cylinder can be repeatedly used for a plurality of times, so that the use cost is very low, the dismantling cost is low without underwater operation, and the economic benefit and the safety are extremely high.

Drawings

FIG. 1 is a schematic view of a structural elevation of a casing of the present invention;

FIG. 2 is a schematic view of another construction of a casing according to the present invention; FIG. 3 is a schematic illustration of the arrangement of the locking mechanism of the lower flange plate of the bottom section casing of the present invention;

FIG. 4 is a schematic view of a conventional casing and a bottom section casing

FIG. 5 is a section B-B of FIG. 4;

FIG. 6 is a schematic view of a P-joint annular gasket seal;

FIG. 7 is a schematic view of section G-G of FIG. 6;

FIG. 8 is a schematic illustration of an I-shaped gasket seal;

FIG. 9 is a schematic view of a flange lock in a locked condition;

FIG. 10 is a schematic view of an open state of the flange lock;

FIG. 11 is a schematic view of an alternative locking state of the flange locking device;

FIG. 12 is a schematic view of an alternative open state of the flange lock;

FIG. 13 is a schematic view of a locking state of the drum locking device;

FIG. 14 is a schematic view of the drum locking device in an unlocked state;

FIG. 15 is a schematic view of a turning bar connection structure;

FIG. 16 is a schematic view of a tie rod attachment structure;

FIG. 17 is a schematic view of a T-lock shaft structure;

FIG. 18 is a view showing the relationship between the T-shaped head and the slot in the locked state of the blade locking device;

FIG. 19 is a view showing the relationship between the T-shaped head and the slot when the barrel locking device is in an unlocked state;

FIG. 20 is an isometric view of a compaction tool;

fig. 21 is a schematic diagram of the operation of the compaction tool.

Reference numerals

Removable cartridge guard 100, removable cartridge guard 200, bottom section cartridge guard 10, segment cartridge guard 20, cartridge piece locking device 6, pull rod holder 80, turn rod holder 50, p-joint annular seal gasket 1, flange locking device 30, pull rod 70, turn rod 40, pull rod connection 8, sleeve 91, counter bolt 92, turn rod connection 4, female plug 41, male plug 42, removable cartridge cap flange piece 2, turn rod rotating handle 3, turn rod connection 4, pull rod pulling handle 7, pull rope 60, stem 33, upper flange piece 21, lower flange piece 22, cartridge body 23, arcuate cartridge piece 24, cartridge piece connecting plate 25, i-shaped seal gasket 26, gasket cylinder 28, lifting lug 27, slotted hole 29, lock shaft hole 39, t-shaped lock shaft 32, nut 35, spring 31, protrusion 34, t-shaped head 36, square section 37, threaded section 38, bolt 97, stop pin 62, compression tool 300, upper clamp plate 301, hole 302, slide rod 305, middle clamp plate 304, base plate 306, jack 307, clamp plate 307, and the like

Detailed Description

The structure to which the present invention relates or these terms of technology are further described below. In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. It is not excluded that the invention may be practiced with other embodiments and that the construction of the invention may be modified without departing from the scope of use of the invention.

As shown in fig. 1-3, the casing of the present invention comprises two major parts: the cartridge 200 and removable cartridge 100 are not removed. Wherein the non-removable cartridge 200 is for burying below ground, the removable cartridge 100 is attached to the non-removable cartridge, and the removable cartridge 100 is positioned above ground.

Removable cartridge 100 is formed from one or more sections of conventional cartridge 20, with the bottom section of segmented cartridge located at the bottom being referred to as the bottom section of segmented cartridge 10. When the common casing 20 has multiple sections, the lengths of the common casings 20 may be the same or different. In addition, the length of the bottom section casing 10 may be the same as or different from the length of the common casing 20. Preferably, the lengths of the conventional casings 20 are generally not the same, which facilitates the assembly of the desired removable casing 100 length and ease of transport and storage during use for recycling.

The diameter of the entire casing is the same, and connection and sealing are facilitated, so that the removable casing 100 is the same diameter as the non-removable casing 200, and the bottom section casing 10 is the same diameter as the conventional casing 20.

The non-removable cartridge guard 200 includes a barrel and a top flange 2 attached to the top of the barrel. Wherein, the barrel is an integral type structure.

As shown in fig. 4 and 5, the bottom section casing 10 and the normal casing 20 are each composed of an upper flange piece 21, a lower flange piece 22, and a casing body 23; the upper flange 21 is connected to the top of the barrel 23, and the lower flange 22 is connected to the bottom of the barrel 23. The barrel 23 is formed by circumferentially combining a plurality of arc barrel pieces 24. In some embodiments, the number of arcuate blades 24 circumscribing one shaft 23 is 3 or 4. Therefore, the dismantling difficulty caused by the fact that the adsorption force and the friction force of the concrete to the protective cylinder are too large when the cylinder pieces 24 are only two pieces is avoided, and the manufacturing workload and the manufacturing cost are not increased due to the fact that the number of the cylinder pieces 24 is too large.

In the invention, the whole pile casing is split into the non-dismantling pile casing 200 and the dismantling pile casing 100, the dismantling pile casing 100 is split into one or more sections of common pile casings 20, wherein the common pile casing at the bottommost part is called a bottom section pile casing 10, and the pile casing body 23 of the bottom section pile casing and the common pile casing is split into a plurality of arc-shaped pile casing sheets 24, so that after construction is finished, pile casing parts above the river bed bottom can be dismantled smoothly, thereby realizing turnover use of the pile casing, and the purposes of convenient construction and saving materials and cost are achieved.

When removable cartridge 100 is connected to non-removable cartridge 200, it is connected by non-removable top flange piece 2 of cartridge 200 and lower flange piece 22 of bottom section cartridge 10. Specifically, the top flange 2 of the non-removable cartridge casing 200 and the lower flange 22 of the bottom section cartridge casing 10 are padded with the P joint annular sealing gasket 1, and then the lower flange 22 and the top flange 2 are locked and fixed by the flange locking device 30, so that the non-removable cartridge casing 200 is fixedly connected with the bottom section cartridge casing 20, that is, the non-removable cartridge casing 200 is fixedly connected with the removable cartridge casing 100.

As shown in fig. 1, 9-12 and 17, the flange lock device 30 includes a T-lock shaft 32, a spring 31, a stem 33, and a nut 35. The T-lock shaft 32 has a T-head with a projection 34 at one end and a threaded section 38 at the other end, a square section 37 immediately adjacent the threaded section. A threaded section 38 is connected with a nut 35; square section 37 connects stem 33; spring 31 is located between the T-head and stem 33. The rotating handle is provided with a rotating handle hole, the rotating handle 33 of the square section for installing the lock shaft is connected with a traction rope 60, the traction rope 60 is simultaneously connected to the rotating rod 40, the rotating rod 40 is rotated through the rotating rod rotating handle 3, and the traction rope 60 and the rotating handle 33 connected with the rotating rod 40 are driven to rotate along with the rotation of the rotating rod 40, so that the flange locking device 30 is opened.

Specifically, the T-shaped lock shaft 32 penetrates through a slot (not shown in the figure) which is matched with the T-shaped head and is arranged on the top flange piece 2 of the undetached protective cylinder 200, then penetrates through the P joint annular sealing gasket 1 to the lower flange piece 22 of the bottom joint protective cylinder 20, and is fastened by the T-shaped head protrusion 34 to the top flange piece 2 of the undetached protective cylinder 200 (the T-shaped head is vertical to the length of the slot at the moment), then the spring 31 is sleeved, then the rotating handle 33 which is matched with the square section is sleeved, the nut 35 is screwed, and the nut 35 is screwed in continuously so that the spring 31 is compressed to a preset amount. The pressure generated by the compressed spring 31 locks (presses) the two flange plates, the flange plates are in a locking state, and the bottom section casing is locked with the casing which is not removed. The pulling rope 60 is connected to the rotating handle, and the other end of the pulling rope 60 is connected to the rotating rod 40. When the flange locking device 30 needs to be opened to separate the bottom joint protection cylinder from the non-dismantling protection cylinder, the rotary rod rotating handle 3 is operated to rotate the rotary rod 40, the rotary rod 33 is forced to rotate through the transmission of the traction rope 60 to rotate by 90 degrees, the T-shaped lock shaft 32 is driven to rotate, the T-shaped head 36 rotates to be consistent with the length direction of the slotted hole, the T-shaped head 36 is retracted into the slotted hole under the action of the spring 31, the lower flange piece 22 and the top flange piece 2 of the non-dismantling protection cylinder 200 are not locked (pressed) any more, and the remote opening of the flange locking device 30 is realized.

In addition, the side walls of the bottom joint protection cylinder 10 and the split protection cylinder 20 are provided with a rotating rod bracket 50 for supporting the rotating rod 40, and the rotating rod is lengthened to an operable position by adopting the rotating rod connecting structure 4, so that the remote opening operation of the locking device 30 is realized. In order to prevent the rotating rod from sliding off in the rotating rod support and also to limit the rotating rod, a limiting pin 62 is arranged at the joint of the rotating rod and the rotating rod support.

The enclosing connection of the cylinder body 23 is realized by the connection between the cylinder piece connecting plates 25 connected to both sides of each arc-shaped cylinder piece 24, specifically, an I-shaped sealing gasket 26 is sandwiched between the two cylinder piece connecting plates 25, and then, the cylinder piece connecting plates 25 are fixedly connected by a row of cylinder piece locking devices 6 arranged on the cylinder piece connecting plates 25. Thereby forming a cylindrical barrel 23. Typically, a series of blade locks 6 on the blade attachment plate 25 has two or more. Specifically, a row of slotted holes 29 are formed in the connecting plate 25 on one side of the barrel piece, and a row of round holes are formed in the connecting plate 25 on the other side of the barrel piece; the slotted hole 29 corresponds to the center position of the round hole; the barrel piece locking device is arranged on the round hole of the barrel piece connecting plate.

The height of the I-shaped sealing gasket 26 is the same as that of the casing body, two ends of the gasket are respectively provided with a cylinder 28, and the gasket is also provided with a locking shaft hole 39 through which a locking device passes, wherein the locking shaft hole is a round hole, and when the locking device is opened, the T-shaped head 36 hooks the I-shaped sealing gasket and cannot fall off, as shown in fig. 8.

As shown in fig. 2, 13, 14 and 17, the barrel locking device 6 comprises a T-shaped lock shaft 32, a spring 31, a rotating handle 33 and a nut 35, wherein one end of the T-shaped lock shaft 32 is provided with a T-shaped head 36 with a protrusion 34, the other end is provided with a thread section 38 at the extreme end, and the position close to the thread section is provided with a square section 37. A connecting nut 35 on the threaded section; square section 37 connects stem 33; spring 31 is located between the T-head and stem 33. The rotating handle is provided with a rotating handle hole for installing a square section of the lock shaft, the rotating handle 33 is connected with a traction rope 60, the traction rope 60 is simultaneously connected to a pull rod 70, the pull rod 70 is lifted by a pull rod lifting handle 7, the traction rope 60 and the rotating handle 33 connected with the traction rope are driven to rotate under the stress, and accordingly the opening of the barrel locking device 6 is remotely realized.

Specifically, the T-shaped lock shaft 32 penetrates from the barrel connecting plate 25 on one side of the slot 29 provided on the barrel connecting plate 25 and matched with the T-shaped head, passes through the I-shaped sealing gasket 26 to the barrel connecting plate 25 with a circular hole on the other side, buckles the connecting plate 25 by the T-shaped head protrusion 34 (at this time, the T-shaped head 36 is perpendicular to the length of the slot 29 as shown in fig. 18), then is sleeved with the spring 31, is sleeved with the stem 33 matched with the square section, and is screwed with the nut 35 to the thread section, so that the spring 31 is compressed to a predetermined amount by continuously screwing the nut 35. The compressed spring 31 generates pressure to lock (press) the two connection plates 25, and the connection plates 25 are in a locked state, so that the barrel and the barrel connected with the connection plates are assembled into a barrel 23. At this time, the barrel locking device 6 is in a locked state. The pulling rope 60 is connected to the stem 33, and the other end of the pulling rope 60 is connected to the pull rod 70. When the barrel locking device 6 needs to be opened to separate the barrel 23 into a plurality of barrel pieces 24, the pull rod 70 is lifted by pulling the pull rod lifting handle 7 upwards, the rotating handle 33 is stressed and rotated by 90 degrees through the transmission of the traction rope 60, the T-shaped lock shaft 32 is driven to rotate, the T-shaped head 36 rotates to be consistent with the length direction of the slotted hole 29, the T-shaped head 36 is retracted into the slotted hole 29 on the connecting plate 25 under the action of the spring 31, the barrel piece connecting plate 25 is not locked (pressed) any more, and the barrel piece locking device 6 is opened as shown in fig. 19.

As shown in fig. 20, in the flange locking device 30 or the barrel locking device 6 described above, the pressing tool 300 of fig. 18 can be used when the spring rate is high and it is difficult to screw the nut by continuously screwing the nut 35 so that the spring is compressed to a predetermined amount. The compaction tool is composed of an upper clamping plate 301, a middle clamping plate 304, a hole 302 which is slightly larger than a lock shaft nut 35, a sliding rod 305 and a base plate 306, wherein the sliding rod 305 is vertically connected to the base plate 306, the upper clamping plate 301 is fixedly connected to the top of the sliding rod 305, and the middle clamping plate 304 passes through the sliding rod 305 and can move along the sliding rod 305 between the upper clamping plate 301 and the base plate 306. Jack 307 is interposed between middle clamp plate 304 and base plate 306.

In use, as shown in fig. 21, the upper clamp plate 301 of the compression tool 300 is clamped with the lock shaft, specifically, the upper clamp plate 301 is clamped with the T-shaped lock shaft T-shaped head 36, the middle clamp plate 304 is clamped with the rotating handle 33, the hole 302 on the middle clamp plate centers the nut 35, the jack 307 is started, the middle clamp plate 304 moves along the slide rod 305 to the upper clamp plate 301 until the spring is compressed to a predetermined amount, the nut 35 is screwed in the hole 302, the jack 307 is loosened and the compression tool 300 is removed, and the flange locking device 30 or the barrel locking device 6 is installed.

At least one lifting lug 27 is arranged on each arc-shaped barrel piece of the bottom section protective barrel and the common protective barrel body 23 and is used for lifting away the barrel piece when the protective barrel is dismounted. In some embodiments, one lifting lug 27 is provided on each arcuate barrel piece.

The connection between the bottom section pile casing 10 and the split pile casing 20 is the same as the connection between the common pile casing 20 and the common pile casing 20, specifically, the connection is achieved through a lower flange 22 at the bottom of the cylinder body and an upper flange 21 at the top of the other cylinder body, more specifically, a P joint annular sealing gasket 1 is clamped between the flange, and then, the adjacent upper flange and the lower flange between the cylinder bodies are fixedly connected through bolts 97 so that the cylinder bodies are connected together.

As shown in fig. 6 and 7, the annular sealing gasket 1 of the P joint is divided into a plurality of pieces along the circumference in a dividing way, and the joints of the pieces are made into a P shape; the plurality of P joint annular sealing gaskets 1 correspond to the arc-shaped barrel pieces 24. The P joint is arranged, so that the synchronous separation of the P joint annular sealing gaskets 1 is realized when the casing barrel pieces are separated.

The side walls of the bottom section pile casing and the common pile casing body 23 are provided with a pull rod bracket 80 and a rotating rod bracket 50 for supporting a barrel piece locking device pull rod 70 and a flange locking device rotating rod 40. And, pull rod 40 and bull stick 70 are segmentation connection structure, and every section pull rod and bull stick length are the same with a section of thick bamboo barrel casing height. The segmented rotating rods are connected through a rotating rod connecting structure 4, specifically, as shown in fig. 15, the rotating rods are connected through mutually matched clamping of a concave plug 41 and a convex plug 42 which are arranged at the end parts of the segmented rotating rods. The segmented tension rod 70 is connected by a tension rod connection structure 8, specifically, as shown in fig. 16, by a sleeve 91 at the port of the tension rod 70 and a countersunk bolt 92. The top end of the rotating rod is provided with a rotating rod rotating handle 3 for rotating the rotating rod 40. The top end of the pull rod is provided with a pull rod lifting handle 7 for lifting the pull rod 70.

The tail end of the pull rod 70 is connected with the barrel locking device 6 through a traction rope 60 which is tied on the pull rod; the end of the rotating rod 40 is connected with the flange locking device 30 through a traction rope 60 which is tied on the rotating rod.

The concrete method for carrying out the construction of the underwater concrete filling pile by the pile casing comprises the following steps:

1. and (3) mounting a protective cylinder:

(1) Calculating the total length of the removable casing section 100 according to the depth of the construction water area and the construction parameters, and selecting common casings 20 with different lengths to splice the total length;

(2) Assembling the protective cylinder, and assembling the selected common protective cylinder into a detachable protective cylinder; wherein, a common casing section at the bottom of the removable casing is called a bottom section casing; each section of common pile casing and each section of bottom section of pile casing body 23 are formed by encircling a plurality of arc-shaped casing sheets, the arc-shaped casing sheets 24 are connected with the arc-shaped casing sheets 24 through casing sheet connecting plates 25, are sealed through I-shaped sealing gaskets 26, and are locked through casing sheet locking devices 6; every two sections of common protection cylinders and the bottom section protection cylinders are connected through upper and lower flange plates 21 and 22, sealed through a P joint annular sealing gasket 1 and connected through bolts; if the removable cartridge 100 is longer in overall length, it can be assembled in sections: firstly, assembling a bottom section of protective cylinder and one or more sections of split protective cylinders into a lower section of protective cylinder, and then assembling other sections of split protective cylinders into one or more sections of upper section of protective cylinders;

(3) Inserting the non-dismantling pile casing 200 to a preset position, and after installing the top flange piece 2 and the P joint annular sealing gasket 1 on the top of the non-dismantling pile casing 200, locking the bottom section pile casing lower flange piece 22 and the top flange piece 2 of the non-dismantling pile casing 200 by using a flange locking device 30; a pull rod bracket 80 and a pull rod bracket 50 of the cylinder body 23 are provided with a cylinder piece locking device pull rod 70, a flange locking device pull rod 40 and a traction rope 60;

(4) Driving the locked non-removable casing 200 and removable casing 100 or lower casing down a predetermined depth;

(5) If the upper section of protection cylinder is provided, a P joint annular sealing gasket 1 is arranged on the top of the lower section of protection cylinder, the upper section of protection cylinder is arranged, the upper section of protection cylinder is connected with a pull rod 70 of the cylinder piece locking device through a flange by bolts, and a traction rope 16 is arranged; driving the casing downward to a predetermined depth;

(6) Repeating the step (5) until the whole installation of the protective cylinder is completed;

2. carrying out concrete pouring construction;

3. and (5) removing the protective cylinder:

(1) After the pouring of the concrete pouring pile is completed and the strength is achieved, a lifting wire rope is used for tying the lifting lug 27 of each arc-shaped barrel piece 24 of the common pile casing at the uppermost section of the pile casing;

(2) Rotating the rotating lever 40 of the flange lock 30 to rotate the lock shaft to an open state, so that the removable cartridge 100 and the non-removable cartridge 200 are in a separable state;

(3) Pulling up the pull rod 70 of the barrel piece locking device 6 to enable the lock shaft to rotate to an open state, and enabling all barrel pieces 24 of the removable protective barrel to be in a separable state;

(4) The hoisting steel wire rope is tightened, and each barrel piece 24 of the removable protective barrel is lifted off the water body and is transferred to a preset place;

(5) And (5) finishing the detachment of the protective cylinder.

Example 1:

manufacturing:

a plurality of concrete filling piles are constructed in a water area, and the length of the removable pile casing is 5-28 meters due to the change of water depth. Four panels were equally divided along the perimeter with a removable section of casing having an inside diameter of 1.0 meter. The common pile casing is made to be 5 m, 2 m and 1 m long to adapt to the change of the detachable length caused by the change of the water depth.

The common pile casing and the bottom joint pile casing are made of steel, and the thickness of the cylinder body, the flange piece, the cylinder piece connecting plate and the lifting lug is 8 mm, and the cylinder body, the flange piece, the cylinder piece connecting plate and the lifting lug are welded.

The pull rod is a square steel tube: 40 mm x 4 mm; the bull stick is round steel pipe: diameter 48 mm x 3.5 mm.

The locking spring has an inner hole diameter of 60 mm, a working load of 8.0 kilonewtons and a working range of 10 mm.

The lock shaft diameter is 45 mm.

The barrel locking devices are arranged at intervals of 300-400 mm, and the flange locking devices are arranged at intervals of 300-400 mm (arc length).

The P joint annular sealing gasket and the I-shaped sealing gasket are all made of 8 mm rubber.

The total length of one of the removable casings is measured to be 7.0 meters, and the removable casings are assembled by splicing 5 meters and 2 meters of the split casings. (common protection barrels of each section are assembled respectively firstly, and then the sections are assembled to form sections.

And (2) mounting:

and (3) the section is not dismantled, a preset depth is punched, a top flange sheet is installed, a P joint annular sealing gasket is installed, a detachable pile casing is installed, the removable pile casing is connected by a flange locking device, the pile casing is continuously pressed to the preset depth, and the bored pile is constructed.

Dismantling:

and the bored pile is constructed and has the condition of dismantling the pile casing. The lifting wire rope is tied to the lifting lug of the uppermost section of common protective cylinder, the rotating rod of the flange locking device is rotated, and the removable protective cylinder (section) is separated from the non-removable protective cylinder; and then the pull rod of the barrel piece locking device is pulled up, and the barrel pieces are separated. And (5) retracting the hoisting steel wire rope, hoisting the barrel piece away from the original position, transferring the barrel piece to a preset place, and finishing the dismantling of the protective barrel.

Example 2:

manufacturing:

a plurality of concrete filling piles are required to be constructed in a sea water area, and the length of the removable pile casing is 12-32 meters due to the change of water depth. Four panels were equally divided along the perimeter with a removable section of casing having an inside diameter of 1.8 meters. The split casing is made to be 5 m, 2 m long and 1 m long to adapt to the change of the detachable length caused by the change of the water depth.

The common pile casing and the bottom section pile casing are made of steel, and the cylinder body, the flange piece, the cylinder piece connecting plate and the lifting lug are all made of steel plates with the thickness of 10 mm and are welded and connected.

The pull rod is a square steel tube: 40 mm x 4 mm; the bull stick is round steel pipe: diameter 48 mm x 3.5 mm.

The locking spring has an inner hole diameter of 60 mm, a working load of 15 kilonewtons and a working range of 10 mm.

The lock shaft diameter is 45 mm.

The barrel locking devices are arranged at intervals of 300-400 mm, and the flange locking devices are arranged at intervals of 300-400 mm (arc length).

The P joint annular sealing gasket and the I-shaped sealing gasket are all made of 12 mm rubber.

The total length of one of the removable casings is measured to be 17.0 meters, and the removable casings are formed by splicing three sections of 5 meters and one section of 2 meters. The two sections are divided, and the lower section consists of a section of a sectional casing 5 m plus 2 m (the total length is 7 m); the upper section of the common type casing is composed of two sections of 5 meters (the total length is 10 meters). Each section of the protection barrel is assembled respectively, and then the lower section and the upper section are assembled between the sections.

The compaction tool was welded using a 6 mm steel plate. The external dimension of the section of the sliding rod is 50 mm multiplied by 50 mm, and the length of the section of the sliding rod is 350 mm; the length of the upper clamping plate is 180 mm, and the outer wrapping size of the cross section is 50 mm multiplied by 50 mm; the thickness of the middle clamping plate is 20 mm, the width of the middle clamping plate is 150 mm, the length of the middle clamping plate is 320 mm, and the diameter of the middle opening is 60 mm; the bottom clamping plate is 20 mm thick, 150 mm wide and 130 mm long; a jack (product) of 2 tons in weight is provided.

And (2) mounting:

the method comprises the steps of removing a section, digging a preset depth, installing a top flange sheet, installing a P joint annular sealing gasket, installing an upper section pile casing, using a compaction tool to assist in installing and connecting a flange locking device, continuing to press down the pile casing for 7 meters, installing the upper section pile casing for 10 meters, then pressing down to the preset depth, and constructing the bored pile.

Dismantling:

and the bored pile is constructed and has the condition of dismantling the pile casing. The lifting wire rope is tied to the lifting lug of the uppermost section of common protective cylinder, the rotating rod of the flange locking device is rotated, and the removable protective cylinder (section) is separated from the non-removable protective cylinder; and then the pull rod of the barrel piece locking device is pulled up, and the barrel pieces are separated. And (5) retracting the hoisting steel wire rope, hoisting the barrel piece away from the original position, transferring the barrel piece to a preset place, and finishing the dismantling of the protective barrel.

Claims (14)

1. A removable pile casing for construction of a concrete cast-in-place pile in a water area, the removable pile casing comprising one or more sections of a common pile casing; the common protection cylinder at the bottommost part is a bottom protection cylinder; the diameter and the structure of the common pile casing and the bottom section pile casing are the same; the bottom section protection cylinder and the common protection cylinder are composed of an upper flange piece, a lower flange piece and a cylinder body; the upper flange piece is connected to the top of the cylinder body, the lower flange piece is connected to the bottom of the cylinder body, and the cylinder body of each section of bottom section of protection cylinder and the cylinder body of the common protection cylinder are formed by circumferentially closing a plurality of arc-shaped cylinder pieces; two sides of each arc-shaped barrel piece are respectively provided with a barrel piece connecting plate; a row of slotted holes are formed on one side edge of the barrel piece connecting plate, and a row of round holes are formed on the other side edge of the barrel piece connecting plate; the slot hole corresponds to the center of the round hole; the adjacent arc-shaped barrel pieces are fixedly connected through a row of barrel piece locking devices arranged on round holes of the barrel piece connecting plates; an I-shaped sealing gasket is clamped between two adjacent barrel connecting plates; the barrel piece locking device comprises a T-shaped lock shaft, a spring, a rotating handle and a nut, wherein one end of the T-shaped lock shaft is provided with a protruding T-shaped head, the extreme end of the other end of the T-shaped lock shaft is provided with a thread section, the position close to the thread section is a square section, and the thread section is connected with the nut; the square section is connected with the rotating handle; the spring is located between the T-head and the stem.

2. The removable cartridge of claim 1 wherein the base section cartridge and the regular cartridge are the same or different in length.

3. The removable cartridge of claim 1 wherein the arcuate segments circumscribing each cartridge body are 3 or 4.

4. A removable cartridge according to claim 2, wherein the array of cartridge locking means disposed on the cartridge web comprises at least two cartridge locking means.

5. The removable cartridge of claim 2 wherein the I-shaped sealing gasket has the same height as the cartridge body and each of the two ends of the gasket has a cylindrical body.

6. The removable cartridge of claim 2 wherein at least one tab is provided on each arcuate segment of the bottom section cartridge, the common cartridge body.

7. The removable cartridge of claim 1 wherein the bottom section cartridge, the side wall of the conventional cartridge body, is provided with a pull rod bracket and a turn rod bracket.

8. The removable cartridge of claim 2 wherein a P-joint annular sealing gasket is disposed between the bottom section cartridge and the common cartridge, and between the common cartridge and the common cartridge; the bottom section protective cylinder is connected and fixed with the common protective cylinder through bolts.

9. The removable cartridge of claim 8 wherein the P-joint annular sealing gasket is divided equally into a plurality of pieces along the perimeter of the piece, the piece-to-piece joint being P-shaped; the plurality of P joint annular sealing gaskets correspond to the arc-shaped barrel pieces.

10. The removable cartridge of claim 7 further comprising a pull rod and a rotating rod supported on the pull rod bracket and the rotating rod bracket, respectively.

11. The removable cartridge of claim 10 wherein the tie rod and the rotating rod are of a segmented connection structure, each segment having the same length as the cartridge body of the cartridge, the tie rod being connected to the stem of the cartridge locking device by a pull rope bolted thereto; the tail end of the rotating rod is connected with the flange locking device through a traction rope which is tied on the rotating rod.

12. A casing for use in construction of a concrete cast-in-place pile in water, the casing comprising a non-removable casing and a removable casing as claimed in any one of claims 1 to 11.

13. The cartridge of claim 12 wherein the non-removable cartridge comprises a body and a top flange piece attached to the top of the body; an annular sealing gasket is arranged between the lower flange piece of the removable casing bottom section casing and the top flange piece of the non-removable casing, and the lower flange piece of the removable casing bottom section casing and the top flange piece of the non-removable casing are locked and fixed by a flange locking device; the flange locking device comprises a T-shaped lock shaft, a spring, a rotating handle and a nut, wherein the spring, the rotating handle and the nut are all positioned on the lock shaft; one end of the T-shaped lock shaft is provided with a protruding T-shaped head, the extreme end of the other end is provided with a thread section, and the position close to the thread section is a square section; a nut is connected to the threaded section; the square section is connected with the rotating handle; the spring is positioned between the T-shaped head and the rotating handle; the tail end of the rotating rod is connected with the rotating handle of the flange locking device through a traction rope which is hung on the rotating rod.

14. The method for constructing the concrete filling pile in the water area by using the removable pile casing comprises the pile casing, wherein the pile casing comprises a non-removable pile casing and a removable pile casing, and a top flange sheet is arranged at the top of the non-removable pile casing; the removable casing comprises one or more sections of common casing; the method comprises the following specific steps:

1. and (3) mounting a protective cylinder:

(1) Calculating the total length of the detachable pile casing section according to the depth of the construction water area and the construction parameters, and selecting common pile casings with different lengths to splice the total length;

(2) Assembling the protective cylinder, and assembling the selected common protective cylinder into a detachable protective cylinder; wherein, the section at the lowest part is called a bottom section casing; the bottom section protective cylinder and the common protective cylinder are both composed of an upper flange piece, a lower flange piece and a cylinder body; the bottom section protective cylinder and the cylinder body of the common protective cylinder are formed by encircling 3 or 4 arc cylinder pieces; the arc-shaped barrel pieces are connected through a barrel piece connecting plate and sealed through an I-shaped sealing gasket, a row of slotted holes are formed in one side edge of the barrel piece connecting plate, and a row of round holes are formed in the other side edge of the barrel piece connecting plate; the slot hole corresponds to the center of the round hole; the adjacent arc-shaped barrel pieces are fixedly connected through a row of barrel piece locking devices arranged on round holes of the barrel piece connecting plates; the bottom section protection cylinder is connected with the common protection cylinder through an upper flange piece and a lower flange piece, is sealed through a P joint annular sealing gasket and is connected through bolts; if the removable cartridge is longer in overall length, it can be assembled in sections: one or more sections of common protection barrels are assembled into a lower section protection barrel, and other sections of common protection barrels are assembled into one or more sections of upper section protection barrels;

(3) Inserting and beating the non-dismantling pile casing to a preset position, and after installing a top flange sheet and a P joint annular sealing gasket at the top of the non-dismantling pile casing, locking the lower flange sheet of the lower pile casing or the lower joint pile casing with the top flange sheet of the non-dismantling pile casing by using a flange locking device; a pull rod of a barrel piece locking device, a pull rod of a flange locking device and a pull rope are arranged on a pull rod bracket and a pull rod bracket of the barrel body; the barrel piece locking device comprises a T-shaped lock shaft, a spring, a rotating handle and a nut, wherein one end of the T-shaped lock shaft is provided with a protruding T-shaped head, the extreme end of the other end of the T-shaped lock shaft is provided with a thread section, and the position close to the thread section is a square section; a nut is connected to the threaded section; the square section is connected with the rotating handle; the spring is positioned between the T-shaped head and the rotating handle; the rotating handle is connected with a traction rope which is simultaneously connected with the pull rod; the flange locking device comprises a T-shaped lock shaft, a spring, a rotating handle and a nut, wherein the spring, the rotating handle and the nut are all positioned on the lock shaft; one end of the T-shaped lock shaft is provided with a protruding T-shaped head, the extreme end of the other end is provided with a thread section, and the position close to the thread section is a square section; a nut is connected to the threaded section; the square section is connected with the rotating handle; the spring is positioned between the T-shaped head and the rotating handle; the rotating handle is connected with a traction rope which is simultaneously connected to the rotating rod;

(4) Driving the locked non-removable casing and removable casing or lower casing down to a predetermined depth;

(5) If the upper section pile casing is arranged, a P joint annular sealing gasket is arranged on the top of the lower section pile casing, the upper section pile casing is arranged and fixedly connected through bolts and flanges, a rotating rod of a flange locking device is additionally connected, a pull rod of a barrel piece locking device is additionally connected, and a pull rope of the pull rod and the rotating handle is arranged; driving the casing downward to a predetermined depth;

(6) Repeating the step (5) until the whole installation of the protective cylinder is completed;

2. carrying out concrete pouring construction;

3. and (5) removing the protective cylinder:

(1) After the pouring of the concrete cast-in-place pile is completed and the strength is reached, a lifting wire rope is used for tying the lifting lug of each arc-shaped barrel piece of the uppermost section of common pile casing;

(2) The rotating rod of the flange locking device is rotated, the traction rope and the rotating handle connected with the traction rope are driven to rotate through the rotation of the rotating rod, and the rotating handle drives the lock shaft to rotate to an opening state, so that the flange locking device is remotely opened, and the detachable protective cylinder and the undetachable protective cylinder are in a separable state;

(3) Pulling up a pull rod of the barrel piece locking device, driving a traction rope and a rotating handle connected with the traction rope to bear force through pulling up of the pull rod, and driving a lock shaft to rotate to an open state through rotation of the rotating handle, so that the barrel piece locking device is remotely opened, and all barrel pieces of the detachable protective barrel are in a separable state;

(4) The hoisting steel wire rope is tightened, and each barrel piece of the removable protective barrel is lifted off the water body and is transferred to a preset place;

(5) And (5) finishing the detachment of the protective cylinder.