CN114045831A - Novel device for underwater drawing steel pipe pile under space limited condition and construction method - Google Patents
Novel device for underwater drawing steel pipe pile under space limited condition and construction method Download PDFInfo
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- CN114045831A CN114045831A CN202111573896.9A CN202111573896A CN114045831A CN 114045831 A CN114045831 A CN 114045831A CN 202111573896 A CN202111573896 A CN 202111573896A CN 114045831 A CN114045831 A CN 114045831A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 234
- 239000010959 steel Substances 0.000 title claims abstract description 234
- 238000010276 construction Methods 0.000 title claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 abstract description 8
- 238000009434 installation Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a new device for underwater drawing steel pipe pile under limited space condition, comprising: the bottom of the plugging head is opened and is arranged at the top of the steel pipe pile to be matched with and close the top opening of the steel pipe pile; the flange is fixed on the outer side wall of the bottom of the blocking head along the circumferential direction of the blocking head; the connecting mechanism is arranged between the plugging head and the steel pipe pile and is used for connecting the flange and the outer side wall of the top of the steel pipe pile; the water injection device is arranged on the outer side of the top of the blocking head and comprises a water inlet pipe, one end of the water inlet pipe is communicated with the inside of the blocking head through a water inlet, and the other end of the water inlet pipe is communicated with an external water source through a water pump; and the exhaust valve is communicated with the inside of the blocking head through an exhaust port. According to the invention, the plugging head is arranged at the top of the steel pipe pile, the water injection device is used for injecting water into the plugging head and the steel pipe pile, the steel pipe pile and the soil body are subjected to piston movement by utilizing the jack principle, the hoisting equipment is convenient to use for quickly and sectionally pulling the pile under the condition of limited space, and meanwhile, the connection stability between the plugging head and the steel pipe pile is ensured through the connecting mechanism.
Description
Technical Field
The invention relates to the technical field of steel pipe pile construction. More particularly, the invention relates to a novel device for underwater drawing of a steel pipe pile under a space-limited condition and a construction method.
Background
The steel-pipe pile is often used in each type of support of bridge, because the support is located under the bridge, after the bridge superstructure construction was accomplished, often received the bridge headroom restriction when the steel-pipe pile was demolishd, has to demolish difficulty, the low scheduling problem of efficiency of construction. In the demolition construction, as the clearance below the bridge is small, large mechanical equipment cannot be utilized, the method that a diver carries out underwater cutting demolition on exposed steel pipe pile segments above a riverbed is generally adopted for construction, and the steel pipe pile foundation of the soil-entering part cannot be pulled out, so that a large amount of steel is wasted, and the water environment is polluted.
In order to solve the above problems, it is necessary to provide a new device and a construction method for pulling out a steel pipe pile under a space-limited condition, which can completely remove the whole steel pipe pile while ensuring the construction efficiency.
Disclosure of Invention
The invention aims to provide a novel device for pulling a steel pipe pile under a space-limited condition and a construction method.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a new apparatus for underwater drawing a steel pipe pile under a space-limited condition, comprising:
the sealing plug is of a hollow structure with an opening at the bottom, is arranged at the top of the steel pipe pile and is matched with the opening at the top of the steel pipe pile to seal the opening at the top of the steel pipe pile, and the top of the sealing plug is provided with a water inlet and an air outlet at intervals, which are communicated with the outside;
the flange is fixed on the outer side wall of the bottom of the blocking head along the circumferential direction of the blocking head;
the connecting mechanism is arranged between the plugging head and the steel pipe pile, and the flange is detachably connected with the outer side wall of the top of the steel pipe pile through the connecting mechanism;
the water injection device is arranged on the outer side of the top of the blocking head and comprises a water inlet pipe, one end of the water inlet pipe is communicated with the inside of the blocking head through the water inlet, and the other end of the water inlet pipe is communicated with an external water source through a water pump; the exhaust valve is communicated with the inside of the blocking head through the exhaust port; and the pressure gauge is arranged to be used for detecting the internal water pressure of the plugging head.
Preferably, in the new device for horizontally pulling the steel pipe pile under the condition of limited space, the plugging head comprises a circular truncated cone which is a hollow structure with a wide upper part and a narrow lower part, and the diameter of an opening at the bottom of the circular truncated cone is equal to that of an opening at the top of the steel pipe pile; a sealing plate disposed on the top of the circular truncated cone and closing the top opening thereof; a lifting lug arranged in the middle of the top surface of the sealing plate.
Preferably, the new device for pulling the steel pipe pile under the condition of limited space further comprises a stiffening plate which comprises a plurality of vertical plates, the stiffening plate is arranged on the top of the sealing plate in a staggered mode and is of a groined structure, and the lifting lug is fixed between two adjacent vertical plates in the middle and is fixedly connected with the vertical plates.
Preferably, in the new device for underwater drawing of the steel pipe pile under the limited space condition, when the top of the steel pipe pile is provided with the connecting flange, the flange is abutted against the connecting flange, and the flange is provided with a plurality of through holes which are in one-to-one correspondence with the plurality of connecting holes on the connecting flange;
the connecting mechanism comprises a gasket which is arranged between the contact surfaces of the flange and the connecting flange; and the bolts are arranged at intervals along the circumferential direction of the flange and correspond to the through holes one by one, and any bolt is fixedly connected with the corresponding through hole, the corresponding connecting hole and the gasket.
Preferably, in the new device for underwater drawing of the steel pipe pile under the limited space condition, when the top of the steel pipe pile is not provided with the connecting flange, the connecting mechanism comprises a plurality of pressing mechanisms which are fixed at the bottom of the flange at intervals along the circumferential direction of the flange, and any one of the pressing mechanisms comprises an air cylinder which is fixed on the bottom surface of the flange and a push rod is vertically arranged downwards; the first hinge seat is positioned on the inner side of the ejector rod and fixed on the cylinder; one end of the pressing rod is hinged with the pushing end of the air cylinder, and a second hinge seat is arranged on the pressing rod; one end of the hinge rod is hinged with the first hinge seat, and the other end of the hinge rod is hinged with the second hinge seat;
when the ejector rod of the air cylinder moves downwards for a certain distance, the free end of the pressing rod rotates to be abutted against and pressed against the outer side wall of the steel pipe pile.
Preferably, the new device for pulling out the steel pipe pile under the condition of limited space further comprises a sleeve, the upper part of the sleeve is sleeved on the inner side wall of the bottom of the plugging head and fixedly connected with the inner side wall, and the lower part of the sleeve vertically extends downwards and is matched and sleeved with the inner side wall of the top of the steel pipe pile.
Preferably, the new device for underwater drawing of the steel pipe pile under the condition of limited space further comprises a plurality of reinforcing ribs which are arranged at intervals along the circumferential direction of the flange, and any reinforcing rib is fixedly connected with the top surface of the flange and the outer side wall of the plugging head.
The invention also provides a construction method of the novel device for underwater drawing the steel pipe pile under the condition of limited space, which comprises the following steps:
s1, removing the upper structure of the steel pipe pile, enabling a connecting flange arranged on the outer side wall of the steel pipe pile to be located at the opening at the top of the steel pipe pile, and assembling a plugging head, a flange and a water injection device;
s2, hoisting the plugging head, the flange and the water injection device to the top of the steel pipe pile as a whole by using hoisting equipment, and enabling the bottom of the plugging head to be matched with and close the top opening of the steel pipe pile;
s3, fixedly connecting the flange with the side wall of the top of the steel pipe pile through a connecting mechanism;
s4, opening a water pump and an exhaust valve, injecting water into the closed space formed by the blocking head and the steel pipe pile, closing the exhaust valve after all gas in the closed space is exhausted, and continuing injecting water into the closed space through a water inlet pipe;
s5, continuously detecting the water pressure in the closed space by using a pressure gauge, stopping water injection and upwards pulling out the new device for horizontally pulling the steel pipe pile under the space limited condition and the steel pipe pile as a whole by using a hoisting device for a certain distance when the detected value reaches a set threshold value;
s6, detaching the pulled steel pipe pile segments from the steel pipe pile, lifting the new device for pulling the steel pipe pile under the space limited condition and the pulled steel pipe pile segments away from the bridge tail by using lifting equipment, and then detaching the connecting mechanism to separate the new device for pulling the steel pipe pile under the space limited condition and the pulled steel pipe pile segments;
and S7, repeating the steps S2-S6, and constructing the next section of the steel pipe pile until all sections of the current steel pipe pile are completely dismantled.
Preferably, in the construction method of the new device for underwater drawing a steel pipe pile under the limited space condition, in S3, when a connecting flange is arranged at the top of the steel pipe pile, the connecting flange is positioned at the opening at the top of the steel pipe pile and is in fit abutment with the flange, a gasket is arranged between the connecting flange and the flange, and then the flange is fixedly connected with the connecting flange through a plurality of bolts;
when the top of the steel pipe pile is not provided with a connecting flange, a sleeve is installed on the inner side wall of the bottom of the plugging head, a plurality of pressing mechanisms are installed at the bottom of the flange, and then a pushing rod of a driving cylinder vertically pushes downwards until the free end of the pressing rod is matched and pressed with the outer side wall of the steel pipe pile.
Preferably, the method of constructing a new apparatus for underwater drawing a steel pipe pile under a limited space condition, in S4, for verifying airtightness of the new apparatus for underwater drawing a steel pipe pile under a limited space condition before formal water injection, includes: and opening the water pump, closing the exhaust valve, injecting a certain amount of water into the closed space through the water inlet pipe, and detecting whether the water pressure in the closed space is in a set range through a pressure gauge.
The invention at least comprises the following beneficial effects:
the invention can be used for the demolition construction of the whole steel pipe pile under the condition of limited space, the plugging head is arranged at the top of the steel pipe pile, the water injection device is used for injecting water into the closed space formed by the plugging head and the steel pipe pile, the steel pipe pile and the soil body are subjected to piston movement by utilizing the principle of the jack, and the upward force is provided for the plugging head by utilizing the water pressure, so that the hoisting equipment is assisted to easily and quickly remove the steel pipe pile, the problem that large equipment cannot be used under the condition of limited space is solved, and the demolition construction of the steel pipe pile is quickly and smoothly carried out; meanwhile, in the steel pipe pile section-by-section dismantling construction, the novel device for horizontally pulling the steel pipe pile under the condition of limited space can be recycled, a large amount of materials are saved, the operation is simple and convenient, the practicability is high, and the application range is wide.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic view of a construction structure of a new apparatus for underwater drawing a steel pipe pile under a space-limited condition according to an embodiment of the present invention, in which a connection flange is provided at the top of the steel pipe pile;
fig. 2 is a schematic construction structure diagram of the new device for underwater drawing a steel pipe pile under the condition of limited space in the embodiment when a connecting flange is not arranged at the top of the steel pipe pile;
fig. 3 is a schematic view of a connection structure between the lifting lug and the stiffening plate in the above embodiment;
fig. 4 is a schematic structural view of the sleeve in the above embodiment.
Description of reference numerals:
1. steel pipe piles; 2. plugging a plug; 3. an exhaust valve; 4. a water inlet pipe; 5. a pressure gauge; 6. a stiffening plate; 7. a flange; 8. a gasket; 9. a bolt; 10. lifting lugs; 11. a water pump; 12. a sleeve; 13. a pressing mechanism.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the 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 present invention.
As shown in fig. 1 to 4, the present invention provides a new apparatus for underwater drawing a steel pipe pile under a space-limited condition, comprising:
the sealing plug 2 is of a hollow structure with an opening at the bottom, the sealing plug 2 is arranged at the top of the steel pipe pile 1 and is matched with the opening at the top of the steel pipe pile 1 to seal the opening at the top of the steel pipe pile 1, and water inlets and air outlets communicated with the outside are arranged at the top of the sealing plug 2 at intervals;
the flange 7 is fixed on the outer side wall of the bottom of the plugging head 2 along the circumferential direction of the plugging head;
the connecting mechanism is arranged between the plugging head 2 and the steel pipe pile 1, and the flange 7 is detachably connected with the outer side wall of the top of the steel pipe pile 1 through the connecting mechanism;
the water injection device is arranged on the outer side of the top of the blocking head 2 and comprises a water inlet pipe 4, one end of the water inlet pipe is communicated with the inside of the blocking head 2 through the water inlet, and the other end of the water inlet pipe is communicated with an external water source through a water pump 11; an exhaust valve 3 which communicates with the inside of the plug 2 through the exhaust port; and the pressure gauge 5 is arranged for detecting the internal water pressure of the plugging head 2.
In the above technical scheme, large mechanical equipment cannot be used due to the limitation of space height, and the single lifting height of the steel pipe pile 1 cannot be too high, so that the steel pipe pile 1 needs to adopt a sectional disassembly construction method. For convenience of disassembly and construction, when the steel pipe pile 1 is driven, the upper sections (such as steel pipe pile sections above the riverbed/above the water surface) of the same steel pipe pile can be connected by adopting the flanges 7, namely, the connecting flanges are arranged among the steel pipe pile sections, the connecting flanges of the adjacent steel pipe pile sections can be locked and connected by bolts, the lower sections (such as steel pipe pile sections below the riverbed/below the water surface) of the same steel pipe pile are inconvenient to install in sections and can only be driven into the position below the riverbed in a whole section, and the steel pipe pile sections of the part are not provided with the connecting flanges. The sealing head 2 is arranged at the top of the steel pipe pile 1 and seals the top opening of the steel pipe pile 1, a closed space is formed between the sealing head 2 and the steel pipe pile 1, the closed space is connected with the outside through an exhaust valve 3 and a water inlet, the water inlet is communicated with a water inlet pipe 4, water can be injected into the closed space from an external water source through a water pump 11 arranged outside, air in the closed space can be exhausted by opening the exhaust valve 3 in the water injection process, the exhaust valve 3 is closed after the air in the closed space is completely exhausted, water is continuously injected into the closed space, the water pressure in the closed space is gradually increased, the water pressure has reverse acting force on soil body at the bottom of the closed space, when the water pressure in the closed space reaches a certain value, the steel pipe pile 1 and soil body at the lower part do piston motion by utilizing the jack principle, at the moment, the sealing head 2 is lifted from the upper part through hoisting equipment, the integral steel pipe pile can be easily pulled out from the water by matching with the soil body back pressure, the water pressure formed by injecting water into the closed space is used as an auxiliary force for lifting the steel pipe pile, and the lifting equipment is convenient to use to quickly lift the steel pipe pile for a certain distance under the condition that the space is limited. And then, the pulled steel pipe pile segments are firstly detached from the integral steel pipe pile and lifted away from a construction site, then the new device for water-pulling the steel pipe pile under the space limited condition is detached from the steel pipe pile segments, and is moved to the steel pipe pile which is not detached, and the pile pulling construction is repeated, so that the segmental detachment of the steel pipe pile can be realized. Meanwhile, in the pile pulling process, the connection stability between the plugging head and the steel pipe pile and the sealing performance of a sealed space are guaranteed through the connecting mechanism, sufficient and stable pressure can be generated on the soil body below when water is injected, pile pulling is assisted, and construction efficiency and construction quality are guaranteed.
The technical scheme solves the problem that large equipment cannot be used under the condition of limited space, is favorable for quick and smooth steel pipe pile dismantling construction, and greatly reduces the manpower input in the steel pipe pile dismantling construction; meanwhile, in the construction of dismantling the steel pipe pile in sections, the novel device for underwater drawing the steel pipe pile under the condition of limited space can be recycled, a large amount of materials are saved, the operation is simple and convenient, the practicability is high, and the application range is wide.
In another technical scheme, in the new device for horizontally pulling the steel pipe pile under the limited space condition, the plugging head 2 comprises a circular truncated cone which is a hollow structure with a wide upper part and a narrow lower part, and the diameter of an opening at the bottom of the circular truncated cone is equal to that of an opening at the top of the steel pipe pile 1; a sealing plate disposed on the top of the circular truncated cone and closing the top opening thereof; a lug 10 provided at the middle of the top surface of the sealing plate. Wherein, shutoff head 2 is the round platform structure that link up from top to bottom, and its top is sealed through the closing plate, and the bottom is connected with the open-top cooperation of steel-pipe pile 1, and shutoff head 2 and the coaxial setting of steel-pipe pile 1 when installation, and when the butt joint, the bottom of shutoff head 2 and the top coincidence of steel-pipe pile 1 just butt each other. And then, fixedly connecting the flange 7 with the outer side wall of the top of the steel pipe pile 1 by using a connecting mechanism, so that the connection between the novel device for pulling the steel pipe pile under the space-limited condition and the steel pipe pile 1 can be completed. The round platform sets up to width from top to bottom narrow structure, conveniently carries out the water injection to shutoff head 2 inner space, and lug 10 sets up in the top surface middle part of closing plate, is convenient for wholly vertically lift by crane from the top novel installation and the steel-pipe pile 1 of water-drawing steel-pipe pile under the limited condition in space.
In another technical scheme, the new device for pulling steel pipe piles under the condition of limited space further comprises a stiffening plate 6 which comprises a plurality of vertical plates, the stiffening plate is arranged on the top of the sealing plate in a staggered mode and is of a groined structure, and the lifting lugs 10 are fixed between two adjacent vertical plates in the middle and are fixedly connected with the vertical plates. Specifically, crisscross a plurality of riser reciprocal fixed connection that set up, form a plurality of square grooves at the top of closing plate, lug 10 sets up the square groove in the closing plate centre, the bottom of lug 10 is fixed on the closing plate, both sides are fixed on rather than the lateral wall of adjacent riser, thereby, when using hoisting equipment to lift by crane, lug 10 passes through stiffening plate 6 with the even distribution of effort to the surface of closing plate, and simultaneously, the joint strength of lug and other structures on the shutoff head has been strengthened in setting up of stiffening plate 6, make hoist and mount more stable.
In another technical scheme, in the new device for underwater drawing the steel pipe pile under the condition of limited space, when the top of the steel pipe pile 1 is provided with a connecting flange, the flange 7 is abutted against the connecting flange, and the flange 7 is provided with a plurality of through holes which are in one-to-one correspondence with a plurality of connecting holes on the connecting flange;
the connecting mechanism comprises a gasket 8 which is arranged between the contact surfaces of the flange 7 and the connecting flange; and a plurality of bolts 9 which are arranged at intervals along the circumferential direction of the flange 7 and correspond to the plurality of through holes one by one, and any bolt 9 is fixedly connected with the corresponding through hole, the corresponding connecting hole and the gasket 8.
In the technical scheme, the steel pipe pile 1 is disassembled in sections, and the top of part of the steel pipe pile sections is provided with the connecting flange when being installed, and the connecting flange is sleeved on the outer side wall of the steel pipe pile section. For the convenience of connection of a connecting mechanism, a plurality of through holes are correspondingly formed in a flange 7 of the novel device for underwater drawing the steel pipe pile under the condition of limited space, if the connecting flange is arranged at the top of the section of the currently constructed steel pipe pile, the connecting mechanism can directly connect the plugging head 2 with the steel pipe pile 1 in a mode that the connecting flange and the corresponding through holes and connecting holes in the connecting flange are fixed by bolts 9 during construction. In addition, a gasket 8 is arranged between the flange 7 and the connecting flange, the gasket is of an annular structure with the shape matched with that of the flange 7, and the gasket 8 is a waterproof sealing rubber gasket and is used for ensuring the sealing property of connection between the plugging head and the steel pipe pile after the flange 7 is connected with the connecting flange, so that subsequent water injection construction can be carried out smoothly.
In another technical scheme, when the top of the steel pipe pile 1 is not provided with a connecting flange, the connecting mechanism comprises a plurality of pressing mechanisms 13 which are fixed at the bottom of the flange 7 at intervals along the circumferential direction of the flange, and any pressing mechanism 13 comprises an air cylinder which is fixed on the bottom surface of the flange 7 and a push rod is vertically arranged downwards; the first hinge seat is positioned on the inner side of the ejector rod and fixed on the cylinder; one end of the pressing rod is hinged with the pushing end of the air cylinder, and a second hinge seat is arranged on the pressing rod; one end of the hinge rod is hinged with the first hinge seat, and the other end of the hinge rod is hinged with the second hinge seat;
when the ejector rod of the air cylinder moves downwards for a certain distance, the free end of the pressing rod rotates to be abutted against and pressed against the outer side wall of the steel pipe pile 1.
Among the above-mentioned technical scheme, because steel-pipe pile 1 is demolishd for the merogenesis, the top of part steel-pipe pile segment is not equipped with flange when the installation, if directly adopt bolted flange and 1 lateral wall of steel-pipe pile, need additionally at steel-pipe pile top installation temporary stand to dock with flange 7, above-mentioned method complex operation, and increaseed the construction volume, all need reinstallate when demolising the steel-pipe pile segment at every turn, be unfavorable for the steel-pipe pile to demolish going on in succession of construction. Therefore, under this condition, adopt the mode that hold-down mechanism 13 cooperation compressed tightly 1 lateral wall of steel-pipe pile to be connected stopper head 2 and steel-pipe pile 1, install a plurality of hold-down mechanisms 13 at flange 7 bottom interval promptly, after stopper head 2 and steel-pipe pile 1 preliminary butt joint are accomplished, the vertical top that pushes down of cylinder among the control hold-down mechanism 13, the ejector pin drives the one end downstream of compressing tightly the pole, owing to receive the restriction of first articulated seat and articulated pole, first articulated seat is fixed on the fixed knot of cylinder, the point that is equipped with the articulated seat of second on the compressing tightly pole rotates around first articulated seat, when the ejector pin moves down, the compressing tightly pole anticlockwise rotates to steel-pipe pile 1 one side under the restriction of articulated pole, the free end of compressing tightly pole is the wedge structure, when it rotates to the butt lateral wall with steel-pipe pile 1, the joint face laminating butt of compressing tightly pole and steel-pipe pile 1. Meanwhile, the distance between the pressing rod and the steel pipe pile in the initial state is controlled, so that when the pressing rod abuts against the steel pipe pile, an obtuse angle is formed between the pressing rod and the ejector rod, and therefore sufficient pressing force can be applied to the outer side wall of the steel pipe pile through the pressing rod when the ejector rod pushes the steel pipe pile, and the sealing head and the steel pipe pile are reliably connected. In addition, the connecting mechanism can control the movement of the air cylinder through external equipment, a constructor does not need to move to the joint of the plugging head and the steel pipe pile, the connecting mechanism fixing flange and the outer side wall of the steel pipe pile are manually used, the connection state of the connecting mechanism can be switched only by controlling the displacement of the ejector rod of the air cylinder, the construction difficulty and the safety risk are reduced, and the construction efficiency is further improved.
In another technical solution, the new device for pulling out a steel pipe pile under a limited space condition further includes a sleeve 12, an upper portion of the sleeve 12 is sleeved on the inner side wall of the bottom of the plugging head 2 and fixedly connected with the same, and a lower portion of the sleeve 12 vertically extends downward and is matched and sleeved with the inner side wall of the top of the steel pipe pile 1. In the technical scheme, corresponding to a plurality of pressing mechanisms 13, a sleeve 12 is arranged on the inner side of the joint of a plugging head 2 and a steel pipe pile 1, the sleeve is matched and sleeved on the inner side wall of the bottom of the plugging head 2 and the inner side wall of the top of the steel pipe pile 1, the lower opening of the plugging head 2 has the same diameter as the upper opening of the steel pipe pile 1, the upper part of the sleeve 12 is fixed on the inner side wall of the plugging head 2, when the plugging head 2 is integrally placed to be in butt joint with the steel pipe pile 1, the lower part of the sleeve 12 is inserted into the steel pipe pile 1, the outer side wall of the lower part of the sleeve 12 is matched and abutted with the inner side wall of the top of the steel pipe pile 1, on one hand, the lower part of the sleeve has a limiting effect on the placement and butt joint of the plugging head and the steel pipe pile, on the other hand, a groove can be arranged on the contact surface of the sleeve, which is connected with the steel pipe pile, and a water-swelling strip is arranged in a matching way, so that the flexible structure of the water-swelling strip can fully fill the connection gap between the plugging head and the steel pipe pile, and after water is injected into the closed space, water permeates into the water-swelling strip, and the water-swelling strip swells when encountering water, so that a connecting gap is further filled, the sealing performance of the closed space is enhanced, and the water-swelling strip is matched with a pressing mechanism on the outer side, so that the connecting stability of the plugging head and the steel pipe pile is improved.
In another technical scheme, the new device for underwater drawing of the steel pipe pile under the limited space condition further comprises a plurality of reinforcing ribs which are arranged at intervals along the circumferential direction of the flange 7, and any reinforcing rib is fixedly connected with the top surface of the flange 7 and the outer side wall of the plugging head 2. Therefore, the connection strength of the flange 7 and the plugging head 2 is guaranteed, when the flange 7 is connected with the steel pipe pile 1 through the connecting mechanism, the connection strength of the flange is improved, and the problems that the flange is deformed and inclined when a large acting force is applied to the lower portion are solved.
The invention also provides a construction method of the novel device for underwater drawing the steel pipe pile under the condition of limited space, which comprises the following steps:
s1, removing the upper structure of the steel pipe pile 1, enabling a connecting flange arranged on the outer side wall of the steel pipe pile 1 to be located at the opening at the top of the steel pipe pile 1, and assembling a plugging head 2, a flange 7 and a water injection device;
after the upper structure of the steel pipe pile is removed, if soil is filled in the steel pipe pile, removing the soil in the steel pipe pile, and reserving a space for subsequent water injection pressurization construction;
s2, hoisting the plugging head 2, the flange 7 and the water injection device to the top of the steel pipe pile 1 as a whole by using hoisting equipment, and enabling the bottom of the plugging head 2 to be matched with and close the top opening of the steel pipe pile 1;
the hoisting equipment is connected with a lifting lug 10 at the top of the plugging head 2 through a steel wire rope, so that the integral hoisting of the novel device for horizontally pulling the steel pipe pile under the condition of limited space is realized;
s3, fixedly connecting the flange 7 with the side wall of the top of the steel pipe pile 1 through a connecting mechanism;
s4, opening a water pump 11 and an exhaust valve 3, injecting water into a closed space formed by the plugging head 2 and the steel pipe pile 1, closing the exhaust valve 3 after all gas in the closed space is discharged, and continuing injecting water into the closed space through a water inlet pipe 4;
s5, continuously detecting the water pressure in the closed space by using a pressure gauge 5, stopping water injection and upwards pulling out the new device for water-pulling the steel pipe pile under the space limited condition and the steel pipe pile 1 as a whole by using a hoisting device for a certain distance when the detected value reaches a set threshold value; specifically, when the acting force of the water pressure in the closed space on the inner top surface of the plugging head exceeds the resultant force of the side friction resistance and the gravity of the steel pipe pile, the detection value can be considered to reach the set threshold value;
s6, detaching the pulled steel pipe pile segment from the steel pipe pile 1, using a hoisting device to hoist the new device for pulling the steel pipe pile under the space limited condition and the pulled steel pipe pile segment off the bridge tail, and then detaching the connecting mechanism to separate the new device for pulling the steel pipe pile under the space limited condition and the pulled steel pipe pile segment;
and S7, repeating the steps S2-S6, and constructing the next section of the steel pipe pile 1 until all the sections of the steel pipe pile 1 are dismantled.
In another technical scheme, in the construction method of the new device for underwater drawing the steel pipe pile under the limited space condition, in S3, when a connecting flange is arranged at the top of the steel pipe pile 1, the connecting flange is positioned at the opening at the top of the steel pipe pile 1 and is matched and abutted with the flange 7, a gasket 8 is arranged between the connecting flange and the flange 7, and then the flange 7 is fixedly connected with the connecting flange through a plurality of bolts 9;
when the top of the steel pipe pile 1 is not provided with a connecting flange, a sleeve 12 is installed on the inner side wall of the bottom of the plugging head 2, a plurality of pressing mechanisms 13 are installed at the bottom of the flange 7, and then a pushing rod of a driving cylinder vertically pushes downwards until the free end of the pressing rod is matched and pressed with the outer side wall of the steel pipe pile 1.
In the embodiment, the segments of the steel pipe pile 1 above the riverbed are provided with the connecting flanges, and the segments of the steel pipe pile 1 below the riverbed are not provided with the connecting flanges, so that in the construction of the initial segment (the steel pipe pile segment provided with the connecting flanges) of the steel pipe pile 1, as shown in fig. 1, the flange 7 on the sealing head 2 and the connecting flange on the steel pipe pile 1 can be directly connected by using bolts 9, and the gasket 8 is used for waterproof sealing; in the subsequent construction of the steel pipe pile 1 (the steel pipe pile segment without the connecting flange), as shown in fig. 2, a pressing mechanism 13 needs to be provided at the bottom of the flange 7 to press the steel pipe pile 1 from the outside, and a sleeve 12 is provided inside the plugging head 2 for waterproof sealing of the connection between the plugging head and the steel pipe pile. The plugging head in fig. 2 is not lowered in place, after the plugging head is completely lowered, the bottom end face (the plane where the flange is located) of the plugging head is overlapped with the top end face of the steel pipe pile, and the connecting position of the upper portion and the lower portion of the sleeve is just clamped at the connecting position of the plugging head and the steel pipe pile. Two modes of the connecting mechanism can be switched conveniently and quickly, and the full-length continuous construction of the whole steel pipe pile is realized by combining the distribution condition matching of the connecting flanges on the steel pipe pile.
In another aspect, the method of constructing a new apparatus for underwater drawing a steel pipe pile under a limited space condition, in S4, prior to formal water injection, for verifying airtightness of the new apparatus for underwater drawing a steel pipe pile under a limited space condition, includes: and opening the water pump 11, closing the exhaust valve 3, injecting a certain amount of water into the closed space through the water inlet pipe 4, and detecting whether the water pressure in the closed space is in a set range through the pressure gauge 5. In addition, whether leakage occurs at the joint of the plugging head 2 and the steel pipe pile 1 and at each interface of the water injection device or not can be observed when air tightness is verified, the sealing performance of a closed space formed by the plugging head 2 and the steel pipe pile 1 is ensured, and the effect of water injection and pressurization is improved.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A new device for underwater drawing a steel pipe pile under a space-limited condition is characterized by comprising:
the sealing plug is of a hollow structure with an opening at the bottom, is arranged at the top of the steel pipe pile and is matched with the opening at the top of the steel pipe pile to seal the opening at the top of the steel pipe pile, and the top of the sealing plug is provided with a water inlet and an air outlet at intervals, which are communicated with the outside;
the flange is fixed on the outer side wall of the bottom of the blocking head along the circumferential direction of the blocking head;
the connecting mechanism is arranged between the plugging head and the steel pipe pile, and the flange is detachably connected with the outer side wall of the top of the steel pipe pile through the connecting mechanism;
the water injection device is arranged on the outer side of the top of the blocking head and comprises a water inlet pipe, one end of the water inlet pipe is communicated with the inside of the blocking head through the water inlet, and the other end of the water inlet pipe is communicated with an external water source through a water pump; the exhaust valve is communicated with the inside of the blocking head through the exhaust port; and the pressure gauge is arranged to be used for detecting the internal water pressure of the plugging head.
2. The new device for underwater drawing steel pipe piles under the space-limited condition as claimed in claim 1, wherein the plugging head comprises a circular truncated cone which is a hollow structure with a wide top and a narrow bottom, and the bottom opening diameter of the circular truncated cone is equal to the top opening diameter of the steel pipe pile; a sealing plate disposed on the top of the circular truncated cone and closing the top opening thereof; a lifting lug arranged in the middle of the top surface of the sealing plate.
3. The new device for underwater pulling steel pipe piles under the condition of limited space according to claim 2, wherein the plugging head further comprises a stiffening plate which comprises a plurality of vertical plates which are arranged on the top of the sealing plate in a staggered manner and are in a groined structure, and the lifting lugs are fixed between two vertical plates adjacent to each other in the middle and are fixedly connected with the vertical plates.
4. The new apparatus for underwater pulling a steel pipe pile under a space-limited condition as recited in claim 1, wherein when a connection flange is provided at a top of the steel pipe pile, the flange abuts against the connection flange, and a plurality of through holes are provided on the flange in one-to-one correspondence with a plurality of connection holes provided on the connection flange;
the connecting mechanism comprises a gasket which is arranged between the contact surfaces of the flange and the connecting flange; and the bolts are arranged at intervals along the circumferential direction of the flange and correspond to the through holes one by one, and any bolt is fixedly connected with the corresponding through hole, the corresponding connecting hole and the gasket.
5. The new apparatus for underwater pulling a steel pipe pile under the space-limited condition as recited in claim 1, wherein when the top of the steel pipe pile is not provided with a connection flange, the connection mechanism includes a plurality of pressing mechanisms fixed at intervals along the circumferential direction of the flange at the bottom thereof, any one of the pressing mechanisms includes a cylinder fixed on the bottom surface of the flange and a push rod is vertically disposed downward; the first hinge seat is positioned on the inner side of the ejector rod and fixed on the cylinder; one end of the pressing rod is hinged with the pushing end of the air cylinder, and a second hinge seat is arranged on the pressing rod; one end of the hinge rod is hinged with the first hinge seat, and the other end of the hinge rod is hinged with the second hinge seat;
when the ejector rod of the air cylinder moves downwards for a certain distance, the free end of the pressing rod rotates to be abutted against and pressed against the outer side wall of the steel pipe pile.
6. The new device for underwater pulling steel pipe piles under the condition of limited space according to claim 5, wherein the connecting mechanism further comprises a sleeve, the upper part of the sleeve is sleeved on the inner side wall of the bottom of the plugging head and fixedly connected with the inner side wall, and the lower part of the sleeve extends vertically downwards and is matched and sleeved with the inner side wall of the top of the steel pipe pile.
7. The new apparatus for underwater pulling a steel pipe pile under the condition of limited space as recited in claim 1, further comprising a plurality of reinforcing ribs arranged at intervals in a circumferential direction of said flange, any one of the reinforcing ribs fixedly connecting a top surface of said flange and an outer side wall of said plugging head.
8. A construction method of a new device for underwater drawing a steel pipe pile under a space-limited condition is characterized by comprising the following steps:
s1, removing the upper structure of the steel pipe pile, enabling a connecting flange arranged on the outer side wall of the steel pipe pile to be located at the opening at the top of the steel pipe pile, and assembling a plugging head, a flange and a water injection device;
s2, hoisting the plugging head, the flange and the water injection device to the top of the steel pipe pile as a whole by using hoisting equipment, and enabling the bottom of the plugging head to be matched with and close the top opening of the steel pipe pile;
s3, fixedly connecting the flange with the side wall of the top of the steel pipe pile through a connecting mechanism;
s4, opening a water pump and an exhaust valve, injecting water into the closed space formed by the blocking head and the steel pipe pile, closing the exhaust valve after all gas in the closed space is exhausted, and continuing injecting water into the closed space through a water inlet pipe;
s5, continuously detecting the water pressure in the closed space by using a pressure gauge, stopping water injection and upwards pulling out the new device for horizontally pulling the steel pipe pile under the space limited condition and the steel pipe pile as a whole by using a hoisting device for a certain distance when the detected value reaches a set threshold value;
s6, detaching the pulled steel pipe pile segments from the steel pipe pile, lifting the new device for pulling the steel pipe pile under the space limited condition and the pulled steel pipe pile segments away from the bridge tail by using lifting equipment, and then detaching the connecting mechanism to separate the new device for pulling the steel pipe pile under the space limited condition and the pulled steel pipe pile segments;
and S7, repeating the steps S2-S6, and constructing the next section of the steel pipe pile until all sections of the current steel pipe pile are completely dismantled.
9. The method of constructing a new apparatus for underwater drawing a steel pipe pile under a limited space condition as recited in claim 8, wherein in S3, when a connection flange is provided at the top of the steel pipe pile, the connection flange is positioned at the top opening of the steel pipe pile and is in fit abutment with the flange, a gasket is provided between the connection flange and the flange, and then the flange and the connection flange are fixedly connected by a plurality of bolts;
when the top of the steel pipe pile is not provided with a connecting flange, a sleeve is installed on the inner side wall of the bottom of the plugging head, a plurality of pressing mechanisms are installed at the bottom of the flange, and then a pushing rod of a driving cylinder vertically pushes downwards until the free end of the pressing rod is matched and pressed with the outer side wall of the steel pipe pile.
10. The method of constructing a new apparatus for underwater drawing a steel pipe pile under a spatially restricted condition as recited in claim 8, wherein the step of verifying airtightness of the new apparatus for underwater drawing a steel pipe pile under the spatially restricted condition prior to formal water injection in S4 comprises: and opening the water pump, closing the exhaust valve, injecting a certain amount of water into the closed space through the water inlet pipe, and detecting whether the water pressure in the closed space is in a set range through a pressure gauge.
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| CN202111573896.9A CN114045831B (en) | 2021-12-21 | 2021-12-21 | Novel device for water drawing steel pipe pile under space limited condition and construction method |
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| CN114045831B CN114045831B (en) | 2023-10-27 |
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| CN212405132U (en) * | 2020-06-29 | 2021-01-26 | 中交第三航务工程局有限公司 | Sealing mechanism of pile tip plugging device for offshore wind power large-diameter single-pile floating transportation |
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| JPH0827791A (en) * | 1994-07-20 | 1996-01-30 | Taisei Corp | Removal method of existing steel pipe pile |
| JP2003119783A (en) * | 2001-10-18 | 2003-04-23 | Daiei Kensetsu Kk | Pile keeper device in pile driving working craft |
| CN103741691A (en) * | 2014-02-11 | 2014-04-23 | 中国石油大学(华东) | Device and method for dismantling offshore pile pipe through reversed pulling under pressure |
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| CN114045831B (en) | 2023-10-27 |
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