CN114045831B - Novel device for water drawing steel pipe pile under space limited condition and construction method - Google Patents
Novel device for water drawing steel pipe pile under space limited condition and construction method Download PDFInfo
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- CN114045831B CN114045831B CN202111573896.9A CN202111573896A CN114045831B CN 114045831 B CN114045831 B CN 114045831B CN 202111573896 A CN202111573896 A CN 202111573896A CN 114045831 B CN114045831 B CN 114045831B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 236
- 239000010959 steel Substances 0.000 title claims abstract description 236
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000010276 construction Methods 0.000 title claims description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 230000000903 blocking effect Effects 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 37
- 238000003825 pressing Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000003809 water extraction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 9
- 210000001503 joint Anatomy 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method 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
- 230000005484 gravity Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
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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
Abstract
The invention discloses a novel device for water drawing a steel pipe pile under a space limited condition, which comprises: the bottom of the blocking head is provided with an opening and is arranged at the top of the steel pipe pile to be matched with and close the opening at the top of the steel pipe pile; a flange fixed to the bottom outer side wall of the stopper in the circumferential direction thereof; the connecting mechanism is arranged between the blocking head and the steel pipe pile and is used for connecting the flange with 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 blocking head is arranged at the top of the steel pipe pile, water is injected into the blocking head and the steel pipe pile by using the water injection device, the steel pipe pile and the soil body are subjected to piston movement by using the jack principle, the quick sectioning pile pulling is conveniently performed by using the hoisting equipment under the condition of limited space, and meanwhile, the stability of connection between the blocking head and the steel pipe pile is ensured by using 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 water drawing a steel pipe pile under a space-limited condition and a construction method.
Background
The steel pipe pile is commonly used in each type of support of bridge, because the support is located under the bridge, after bridge superstructure construction is accomplished, often receives the bridge headroom restriction when the steel pipe pile is demolishd, has to demolish difficult, the inefficiency scheduling problem of construction efficiency. In the demolishing construction, because the clearance under the bridge is small, large-scale mechanical equipment cannot be utilized, a method of underwater cutting demolishing is generally adopted by divers for the exposed part of the steel pipe pile section above the river bed, the steel pipe pile foundation of the soil-entering part cannot be pulled out, a large amount of steel is wasted, and the water body environment is polluted.
In order to solve the problems, a new device and a construction method for water drawing steel pipe piles under the condition of limited space are needed to be provided, and the whole steel pipe pile can be completely dismantled under the condition of ensuring the construction efficiency.
Disclosure of Invention
The invention aims to provide a novel device for water drawing a steel pipe pile under the condition of space limitation and a construction method, wherein a blocking head is arranged at the top of the steel pipe pile, water is injected into the blocking head and the steel pipe pile by using a water injection device, the steel pipe pile and a soil body are subjected to piston movement by using a jack principle, quick and sectional pile drawing is conveniently carried out by using hanging equipment under the condition of space limitation, and meanwhile, the stability of connection between the blocking head and the steel pipe pile is ensured by using a connecting mechanism.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a new apparatus for water drawing a steel pipe pile under space-constrained conditions, comprising:
the sealing head 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 a water inlet and an air outlet which are communicated with the outside are arranged at intervals at the top of the sealing head;
a flange fixed to the bottom outer side wall of the stopper in the circumferential direction thereof;
the connecting mechanism is arranged between the blocking 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 plugging head and comprises a water inlet pipe, one end of the water inlet pipe is communicated with the inside of the plugging 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; an exhaust valve which communicates with the inside of the plugging head through the exhaust port; and the pressure gauge is used for detecting the internal water pressure of the plugging head.
Preferably, the plugging head comprises a round table, wherein the round table is of a hollow structure with a wide upper part and a narrow lower part, and the diameter of the bottom opening of the plugging head is equal to that of the top opening of the steel pipe pile; the sealing plate is arranged at the top of the round table and seals the top opening of the round table; and the lifting lug is arranged in the middle of the top surface of the sealing plate.
Preferably, the new device for water drawing the steel pipe pile under the condition of space limitation, the plugging head further comprises a stiffening plate, the stiffening plate comprises a plurality of vertical plates, the top of the sealing plate is in a groined structure in a staggered mode, and the lifting lug is fixed between two vertical plates adjacent to the middle of the lifting lug and fixedly connected with the lifting lug.
Preferably, in the new device for water drawing the steel pipe pile under the condition of limited space, when a connecting flange is arranged at the top of the steel pipe pile, the flange is abutted against the connecting flange, and a plurality of through holes are formed in the flange and correspond to the plurality of connecting holes in the connecting flange one by one;
the connecting mechanism comprises a gasket which is arranged between the contact surfaces of the flange and the connecting flange; the bolts are arranged at intervals along the circumferential direction of the flange and correspond to the perforations one by one, and any bolt is fixedly connected with the corresponding perforation, the corresponding connecting hole and the gasket.
Preferably, in the new device for water drawing a steel pipe pile under the condition of limited space, when a connecting flange is not arranged at the top of the steel pipe pile, the connecting mechanism comprises a plurality of pressing mechanisms which are fixed at the bottom of the connecting mechanism at intervals along the circumferential direction of the flange, and any pressing mechanism comprises an air cylinder which is fixed on the bottom surface of the flange and is vertically arranged with a push rod downwards; the first hinge seat is positioned on the inner side of the push rod and is fixed on the cylinder; one end of the compression rod is hinged with the pushing end of the air cylinder, and a second hinging seat is arranged on the compression 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 with the outer side wall of the steel pipe pile and pressed.
Preferably, the novel device for water drawing the steel pipe pile under the condition of space limitation further comprises a sleeve, wherein the upper part of the sleeve is sleeved on the inner side wall at the bottom of the blocking head and is 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 at the top of the steel pipe pile.
Preferably, the novel device for water drawing 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, wherein 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 water drawing the steel pipe pile under the space limited condition, which comprises the following steps:
s1, dismantling a steel pipe pile upper structure, enabling a connecting flange arranged on the outer side wall of the steel pipe pile to be positioned at the top opening of the steel pipe pile, and assembling a blocking head, the flange and a water injection device;
s2, using lifting equipment to lift the plugging head, the flange and the water injection device as a whole to the top of the steel pipe pile, so that the bottom of the plugging head is matched with the top opening of the steel pipe pile;
s3, fixedly connecting the flange with the top side wall of the steel pipe pile through a connecting mechanism;
s4, opening a water pump and an exhaust valve, injecting water into a closed space formed by the plugging head and the steel pipe pile, closing the exhaust valve after all the gas in the closed space is exhausted, and continuously 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 pulling out a new device for pulling out the steel pipe pile and the steel pipe pile as a whole upwards by using hoisting equipment under the space-limited condition when the detection value reaches a set threshold value;
s6, removing the extracted steel pipe pile section from the steel pipe pile, hoisting a new device for water extraction of the steel pipe pile under the space-limited condition and the extracted steel pipe pile section away from the bridge tail by using hoisting equipment, and removing the connecting mechanism to separate the new device for water extraction of the steel pipe pile under the space-limited condition from the extracted steel pipe pile section;
and S7, repeating the steps of S2-S6, and constructing the next section of the steel pipe pile until all sections of the current steel pipe pile are removed.
In the construction method of the new device for water drawing the steel pipe pile under the condition of limited space, in S3, when a connecting flange is arranged at the top of the steel pipe pile, the connecting flange is positioned at the top opening of the steel pipe pile and is matched and abutted with the flange, a gasket is arranged between the connecting flange and the flange, and then the flange and the connecting flange are fixedly connected through a plurality of bolts;
when the top of the steel pipe pile is not provided with a connecting flange, a sleeve is arranged on the inner side wall of the bottom of the blocking head, a plurality of pressing mechanisms are arranged at the bottom of the flange, and then the push rod of the driving cylinder is vertically pushed downwards until the free end of the pressing rod is matched and pressed with the outer side wall of the steel pipe pile.
Preferably, in the construction method of the new device for water drawing a steel pipe pile under the space limitation condition, S4, the air tightness of the new device for water drawing a steel pipe pile under the space limitation condition is verified before the formal water injection, and the method comprises the following steps: 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 the pressure gauge.
The invention at least comprises the following beneficial effects:
the invention can be used for dismantling the whole steel pipe pile under the condition of limited space, the sealing plug is arranged at the top of the steel pipe pile, water is injected into a closed space formed by the sealing head and the steel pipe pile by using the water injection device, the steel pipe pile and the soil body are subjected to piston movement by using the jack principle, and upward force is provided for the sealing head by using water pressure, so that the hoisting equipment is assisted to easily and rapidly pull out the steel pipe pile, the problem that large equipment cannot be used under the condition of limited space is solved, and the steel pipe pile dismantling construction is facilitated to be rapidly and smoothly carried out; meanwhile, in the construction of the steel pipe pile section dismantling, the novel device for water 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.
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 construction diagram of a new apparatus for water drawing a steel pipe pile under a space-limited condition according to an embodiment of the present invention, when a connecting flange is provided at the top of the steel pipe pile;
fig. 2 is a schematic construction diagram of a new apparatus for water drawing a steel pipe pile under the condition of limited space in the above embodiment when no connecting flange is provided 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 according to the above embodiment.
Reference numerals illustrate:
1. a steel pipe pile; 2. a blocking head; 3. an exhaust valve; 4. a water inlet pipe; 5. a pressure gauge; 6. stiffening plates; 7. a flange; 8. a gasket; 9. a bolt; 10. lifting lugs; 11. a water pump; 12. a sleeve; 13. and a compressing mechanism.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "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 merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.
As shown in fig. 1 to 4, the present invention provides a new apparatus for water 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, and a water inlet and an air outlet which are communicated with the outside are arranged at intervals at the top of the sealing plug 2;
a flange 7 fixed to the bottom outer side wall of the plugging head 2 in the circumferential direction thereof;
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 plugging head 2 and comprises a water inlet pipe 4, one end of the water inlet pipe is communicated with the inside of the plugging 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 communicating with the inside of the plugging head 2 through the exhaust port; a pressure gauge 5 arranged to detect the internal water pressure of the head 2.
In the above technical solution, because the space height is limited, large mechanical equipment cannot be used, and the single lifting height of the steel pipe pile 1 cannot be too high, the steel pipe pile 1 needs to be constructed by adopting a sectional disassembly method. For convenient dismantlement construction, when steel-pipe pile 1 is driven into, the upper portion section (like the steel-pipe pile section of above the riverbed/the above surface of water part) of same steel-pipe pile all can adopt flange 7 to connect, is provided with flange between the steel-pipe pile section promptly, and accessible bolt locking is connected between the flange of adjacent steel-pipe pile section, and the lower portion section (like the steel-pipe pile section of below the riverbed/below the surface of water part) of same steel-pipe pile is inconvenient to install in the segmentation, can only drive into below the riverbed by whole festival, does not be equipped with flange on the steel-pipe pile section of this part. 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 sealed space is formed between the sealing head 2 and the steel pipe pile 1, the sealed space is connected with the outside through the exhaust valve 3 and the water inlet, the water inlet is communicated with the water inlet pipe 4, water can be injected into the sealed space from an external water source through the water pump 11 arranged outside, air in the sealed space can be discharged through opening the exhaust valve 3 in the water injection process, the exhaust valve 3 is closed after the air in the sealed space is completely discharged, water is continuously injected into the sealed space, the internal water pressure of the sealed space is gradually increased, reverse acting force exists on the soil body at the bottom of the sealed space due to the water pressure, when the internal water pressure of the sealed space reaches a certain value, the steel pipe pile 1 and the soil body at the lower part can be moved by utilizing the jack principle, at the moment, the lifting device can easily lift the sealing head 2 from the upper part by matching with the soil body back pressure to lift the whole steel pipe pile underwater, the water pressure formed by water injection is used as assistance to provide a lifting force for lifting the steel pipe pile, and the lifting device can be used conveniently and rapidly to lift the pile under the condition of limited space. And then, the pulled-up steel pipe pile section is firstly removed from the integral steel pipe pile, the construction site is lifted away, a new device for water pulling the steel pipe pile under the condition of limited space is removed from the steel pipe pile section, and the new device is moved to the position of the steel pipe pile which is not removed, and pile pulling construction is repeatedly carried out, so that the sectional removal of the steel pipe pile can be realized. Meanwhile, in the pile pulling process, the stability of connection between the blocking head and the steel pipe pile and the tightness of a closed space are guaranteed through the connecting mechanism, and enough and stable pressure can be generated on a soil body below during water injection, so that pile pulling is assisted, and the construction efficiency and the construction quality are guaranteed.
The technical scheme solves the problem that large-scale equipment cannot be used under the condition of limited space, is beneficial to the rapid and smooth performance of the steel pipe pile dismantling construction, and greatly reduces the labor investment in the steel pipe pile dismantling construction; meanwhile, in the construction of the steel pipe pile section dismantling, the novel device for water 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, the novel device for water drawing the steel pipe pile under the condition of limited space comprises a round table, wherein the plugging head 2 is of a hollow structure with a wide upper part and a narrow lower part, and the diameter of the bottom opening of the plugging head is equal to that of the top opening of the steel pipe pile 1; the sealing plate is arranged at the top of the round table and seals the top opening of the round table; and a lifting lug 10 arranged in the middle of the top surface of the sealing plate. The sealing head 2 is of a round platform structure which is vertically penetrated, the top of the sealing head is sealed through a sealing plate, the bottom of the sealing head is connected with the top opening of the steel pipe pile 1 in a matched mode, the sealing head 2 and the steel pipe pile 1 are coaxially arranged during installation, and the bottom end of the sealing head 2 and the top end of the steel pipe pile 1 are overlapped and mutually abutted during butt joint. And then, fixedly connecting the flange 7 with the top outer side wall of the steel pipe pile 1 by using a connecting mechanism, so that the connection between the new device for water drawing the steel pipe pile and the steel pipe pile 1 under the condition of limited space can be completed. The round platform is arranged to be wide in the upper portion and narrow in the lower portion, water injection is conveniently carried out on the inner space of the plugging head 2, the lifting lug 10 is arranged in the middle of the top surface of the sealing plate, and the novel device for water drawing the steel pipe pile and the steel pipe pile 1 under the space limited condition are convenient to lift vertically from the whole upper portion.
In another technical scheme, the new device for water drawing the steel pipe pile under the space-limited condition, the plugging head 2 further comprises a stiffening plate 6 which comprises a plurality of vertical plates, wherein the top of the sealing plate is staggered to form a groined structure, and the lifting lug 10 is fixed between two vertical plates adjacent to the middle part and fixedly connected with the two vertical plates. Specifically, a plurality of risers of crisscross setting are fixed connection each other, form a plurality of square grooves at the top of closing plate, lug 10 sets up in the square groove in the middle of the sealing plate is positive, the bottom of lug 10 is fixed on the closing plate, both sides are fixed on the lateral wall of rather than adjacent riser to when using lifting by crane equipment to lift by crane, lug 10 is through the surface of stiffening plate 6 with the even distribution of effort to the closing plate, simultaneously, the setting of stiffening plate 6 has strengthened the joint strength of lug and the overhead other structures of shutoff, makes the hoist and mount more stable.
In another technical scheme, when a connecting flange is arranged at the top of the steel pipe pile 1, the flange 7 is abutted against the connecting flange, and a plurality of through holes are formed in the flange 7 and correspond to the plurality of connecting holes in the connecting flange one by one;
the connection means comprise a spacer 8 arranged between the contact surfaces of the flange 7 and the connection flange; the bolts 9 are arranged at intervals along the circumferential direction of the flange 7 and correspond to the perforations one by one, and any bolt 9 is fixedly connected with the corresponding perforation, the corresponding connecting hole and the gasket 8.
In the above technical scheme, since the steel pipe pile 1 is detached in sections, the top of a part of the steel pipe pile section is provided with the connecting flange during installation, and the connecting flange is sleeved on the outer side wall of the steel pipe pile section. In order to facilitate connection of the connection mechanism, a plurality of through holes are formed in the flange 7 of the new device for water drawing the steel pipe pile under the condition of limited space, if the top of the currently constructed steel pipe pile section is provided with the connection flange, the connection mechanism can directly connect the plugging head 2 with the steel pipe pile 1 by fixing the corresponding through holes and the connecting holes in the connection flange and the connection flange through bolts 9 during construction. In addition, be equipped with gasket 8 between flange 7 and flange, it is the annular structure that shape and flange 7 match, gasket 8 is waterproof sealing rubber gasket for after flange 7 and flange connection, guarantee the leakproofness of being connected between shutoff head and steel-pipe pile, be convenient for follow-up water injection construction go on smoothly.
In another technical scheme, when a connecting flange is not arranged at the top of the steel pipe pile 1, 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, and any pressing mechanism 13 comprises an air cylinder which is fixed on the bottom surface of the flange 7 and is vertically arranged with a push rod downwards; the first hinge seat is positioned on the inner side of the push rod and is fixed on the cylinder; one end of the compression rod is hinged with the pushing end of the air cylinder, and a second hinging seat is arranged on the compression 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 with the outer side wall of the steel pipe pile 1 and pressed.
In the above technical scheme, since the steel pipe pile 1 is dismantled in sections, the top of a part of steel pipe pile sections is not provided with a connecting flange during installation, if the connecting flange is directly connected with the outer side wall of the steel pipe pile 1 by bolts, a temporary support is additionally arranged at the top of the steel pipe pile so as to be in butt joint with the flange 7, the method is complex in operation, the construction quantity is increased, and the steel pipe pile sections are reinstalled each time when being dismantled, so that the continuous dismantling construction of the steel pipe pile is not facilitated. Therefore, in this case, the mode of adopting hold-down mechanism 13 cooperation to compress tightly steel-pipe pile 1 lateral wall is connected shutoff head 2 and steel-pipe pile 1, namely install a plurality of hold-down mechanisms 13 in flange 7 bottom interval, after the preliminary butt joint of shutoff head 2 and steel-pipe pile 1 is accomplished, the cylinder in control hold-down mechanism 13 is vertically pushed down, the one end of push rod drive hold-down lever is the downward movement, owing to receive the restriction of first articulated seat and articulated lever, first articulated seat is fixed on the fixed knot of cylinder, the point that is equipped with the second articulated seat on the hold-down lever rotates around first articulated seat, when the push rod moves down, the hold-down lever anticlockwise rotates to steel-pipe pile 1 one side under the restriction of articulated lever, the free end of hold-down lever is wedge structure, when it rotates to the lateral wall butt with steel-pipe pile 1, the joint face laminating butt of hold-down lever and steel-pipe pile 1. Meanwhile, the interval between the pressing rod and the steel pipe pile in the initial state is controlled, so that an obtuse angle is formed between the pressing rod and the pushing rod when the pressing rod is abutted against the steel pipe pile, and therefore, enough pressing force can be applied to the outer side wall of the steel pipe pile through the pressing rod when the pushing rod is pushed, and connection reliability between the blocking head and the steel pipe pile is guaranteed. In addition, the connecting mechanism can control the movement of the air cylinder through external equipment, constructors do 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 pushing rod of the air cylinder, the construction difficulty and the safety risk are reduced, and the construction efficiency is further improved.
In another technical scheme, the novel device for water drawing the steel pipe pile under the condition of space limitation, the connecting mechanism further comprises a sleeve 12, the upper part of the sleeve is sleeved on the inner side wall of the bottom of the blocking head 2 and is fixedly connected with the inner side wall of the bottom of the blocking head, and the lower part of the sleeve 12 vertically extends downwards and is matched and sleeved with the inner side wall of the top of the steel pipe pile 1. In the above technical scheme, corresponding to the plurality of pressing mechanisms 13, the sleeve 12 is arranged on the inner side of the joint of the plugging head 2 and the steel pipe pile 1, the matching inner sleeve is arranged on the bottom inner side wall of the plugging head 2 and the top inner side wall of the steel pipe pile 1, the lower opening of the plugging head 2 is the same as the upper opening diameter 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 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 lower outer side wall of the sleeve 12 is in butt joint with the top inner side wall of the steel pipe pile 1 in a matching manner, on one hand, the lower part of the sleeve can be provided with a groove on the contact surface of the plugging head and the steel pipe pile connection, and on the other hand, the groove is internally matched with a water-swelling strip, 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 when water is injected into the sealing space, the water-swelling strip is in the water-swelling position, the water-swelling joint gap, the sealing gap is further filled, the sealing performance of the sealing space is enhanced, and the pressing mechanism is matched with the joint with the outer side of the steel pipe pile 1.
In another technical scheme, the novel device for water drawing the steel pipe pile under the space-limited condition further comprises a plurality of reinforcing ribs which are arranged at intervals along the circumferential direction of the flange 7, wherein 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 blocking head 2 is ensured, and 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 of deformation, deflection and the like of the flange when the flange is subjected to a large acting force below are avoided.
The invention also provides a construction method of the novel device for water drawing the steel pipe pile under the space limited condition, which comprises the following steps:
s1, dismantling an upper structure of a steel pipe pile 1, enabling a connecting flange arranged on the outer side wall of the steel pipe pile 1 to be positioned at the top opening of the steel pipe pile 1, and assembling a blocking head 2, a flange 7 and a water injection device;
after the upper structure of the steel pipe pile is dismantled, if the inside of the steel pipe pile is filled with soil, the inside soil is firstly cleared, and a space is reserved for subsequent water injection and pressurization construction;
s2, lifting the plugging head 2, the flange 7 and the water injection device as a whole to the top of the steel pipe pile 1 by using lifting equipment, so that the bottom of the plugging head 2 is matched with the top opening of the steel pipe pile 1;
the hoisting equipment is connected with the lifting lug 10 at the top of the blocking head 2 through a steel wire rope, so that the integral hoisting of a new device for water drawing the steel pipe pile under the condition of limited space is realized;
s3, fixedly connecting the flange 7 with the top side wall 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 the gas in the closed space is exhausted, and continuously 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 pulling out a new device for pulling out the steel pipe pile and the steel pipe pile 1 as a whole upwards by using hoisting equipment under the space-limited condition when the detection 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 blocking 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, removing the extracted steel pipe pile section from the steel pipe pile 1, hoisting a new device for water extraction of the steel pipe pile and the extracted steel pipe pile section under the space-limited condition by using hoisting equipment to separate the bridge tail, and then removing the connecting mechanism to separate the new device for water extraction of the steel pipe pile from the extracted steel pipe pile section under the space-limited condition;
and S7, repeating the steps of S2-S6, and constructing the next section of the steel pipe pile 1 until all sections of the current steel pipe pile 1 are dismantled.
In another technical scheme, in the construction method of the new device for water drawing the steel pipe pile under the condition of space limitation, in the step S3, when a connecting flange is arranged at the top of the steel pipe pile 1, the connecting flange is positioned at the top opening 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 arranged on the inner side wall of the bottom of the plugging head 2, a plurality of pressing mechanisms 13 are arranged at the bottom of the flange 7, and then the pushing rod of the driving cylinder is vertically pushed downwards until the free end of the pressing rod is matched and pressed with the outer side wall of the steel pipe pile 1.
The same steel pipe pile 1 is dismantled in sections, and two conditions of being provided with a connecting flange and not provided with a connecting flange exist in different steel pipe pile sections, and corresponding two modes are also provided for the connecting mechanism, in the embodiment, the connecting flanges are all arranged on the sections of the steel pipe pile 1 above the riverbed, and the connecting flanges are not arranged on the sections of the steel pipe pile 1 below the riverbed, so that in the construction of the initial section (the steel pipe pile section provided with the connecting flange) of the steel pipe pile 1, as shown in fig. 1, the connecting flanges 7 on the blocking heads 2 and the connecting flanges on the steel pipe pile 1 can be directly connected by bolts 9, and gaskets 8 are used for waterproof sealing; in the construction of the subsequent section of the steel pipe pile 1 (the section of the steel pipe pile not provided with the connecting flange), as shown in fig. 2, a pressing mechanism 13 is required 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 at the inner side of the plugging head 2 for waterproof sealing of the connection of the plugging head and the steel pipe pile at this time. In fig. 2, the plugging head is not lowered in place, and after the plugging head is completely lowered, the bottom end face (the plane where the flange is located) of the plugging head coincides with the top end face of the steel pipe pile, and the connection position of the plugging head and the steel pipe pile is just clamped at the connection position of the upper part and the lower part of the sleeve. The two modes of the connecting mechanism can be switched conveniently and rapidly, and the full-length continuous construction of the whole steel pipe pile is realized by combining the distribution situation of the connecting flanges on the steel pipe pile.
In another technical scheme, in the construction method of the new device for water drawing the steel pipe pile under the space limitation condition, in S4, the air tightness of the new device for water drawing the steel pipe pile under the space limitation condition is verified before formal water injection, and the method comprises the following steps: the water pump 11 is opened, the exhaust valve 3 is closed, a certain amount of water is injected into the closed space through the water inlet pipe 4, and whether the water pressure in the closed space is within a set range is detected through the pressure gauge 5. In addition, the joint of the plugging head 2 and the steel pipe pile 1 and whether leakage occurs at each joint of the water injection device can be observed when the air tightness is verified, the tightness of a closed space formed by the plugging head 2 and the steel pipe pile 1 is ensured, and the water injection pressurizing effect is improved.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. A novel device for water drawing a steel pipe pile under a space limited condition, which is characterized by comprising:
the sealing head 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 a water inlet and an air outlet which are communicated with the outside are arranged at intervals at the top of the sealing head;
a flange fixed to the bottom outer side wall of the stopper in the circumferential direction thereof;
the connecting mechanism is arranged between the blocking 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 plugging head and comprises a water inlet pipe, one end of the water inlet pipe is communicated with the inside of the plugging 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; an exhaust valve which communicates with the inside of the plugging head through the exhaust port; a pressure gauge arranged to detect the internal water pressure of the occlusion head;
when a connecting flange is arranged at the top of the steel pipe pile, the flange is abutted with the connecting flange, and a plurality of through holes are formed in the flange and correspond to a plurality of connecting holes in the connecting flange one by one; the connecting mechanism comprises a gasket which is arranged between the contact surfaces of the flange and the connecting flange; the bolts are arranged at intervals along the circumferential direction of the flange and correspond to the perforations one by one, and any bolt is fixedly connected with the corresponding perforation, the corresponding connecting hole and the gasket;
when the top of the steel pipe pile is not provided with a connecting flange, the connecting mechanism comprises a plurality of pressing mechanisms which are fixed at the bottom of the steel pipe pile at intervals along the circumferential direction of the flange, and any pressing mechanism comprises an air cylinder which is fixed on the bottom surface of the flange and is vertically and downwards arranged on the push rod; the first hinge seat is positioned on the inner side of the push rod and is fixed on the cylinder; one end of the compression rod is hinged with the pushing end of the air cylinder, and a second hinging seat is arranged on the compression 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; the upper part of the sleeve is sleeved on the inner side wall of the bottom of the blocking head and is fixedly connected with the inner side wall of the bottom of the blocking head, 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, a groove is formed in the contact surface of the sleeve, which is connected with the blocking head and the steel pipe pile, and a water swelling strip is matched and arranged in the groove; 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 with the outer side wall of the steel pipe pile and pressed.
2. The new device for water drawing the steel pipe pile under the space limitation condition according to claim 1, wherein the plugging head comprises a round table which is of a hollow structure with a wide upper part and a narrow lower part, and the bottom opening diameter of the plugging head is equal to the top opening diameter of the steel pipe pile; the sealing plate is arranged at the top of the round table and seals the top opening of the round table; and the lifting lug is arranged in the middle of the top surface of the sealing plate.
3. The new device for water drawing steel pipe piles under the space-limited condition according to claim 2, wherein the plugging head further comprises a stiffening plate, the stiffening plate comprises a plurality of vertical plates, the top of the sealing plate is staggered to form a groined structure, and the lifting lug is fixed between and fixedly connected with two vertical plates adjacent to the middle part.
4. The new apparatus for extracting steel pipe pile under space limitation condition as defined in claim 1, further comprising a plurality of reinforcing ribs arranged at intervals along the circumference of said flange, any reinforcing rib fixedly connecting the top surface of said flange with the outer side wall of said plugging head.
5. The construction method of the novel device for water drawing the steel pipe pile under the condition of space limitation is characterized by comprising the following steps:
s1, dismantling a steel pipe pile upper structure, enabling a connecting flange arranged on the outer side wall of the steel pipe pile to be positioned at the top opening of the steel pipe pile, and assembling a blocking head, the flange and a water injection device;
s2, using lifting equipment to lift the plugging head, the flange and the water injection device as a whole to the top of the steel pipe pile, so that the bottom of the plugging head is matched with the top opening of the steel pipe pile;
s3, fixedly connecting the flange with the top side wall of the steel pipe pile through a connecting mechanism;
s4, opening a water pump and an exhaust valve, injecting water into a closed space formed by the plugging head and the steel pipe pile, closing the exhaust valve after all the gas in the closed space is exhausted, and continuously 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 pulling out a new device for pulling out the steel pipe pile and the steel pipe pile as a whole upwards by using hoisting equipment under the space-limited condition when the detection value reaches a set threshold value;
s6, removing the extracted steel pipe pile section from the steel pipe pile, hoisting a new device for water extraction of the steel pipe pile under the space-limited condition and the extracted steel pipe pile section away from the bridge tail by using hoisting equipment, and removing the connecting mechanism to separate the new device for water extraction of the steel pipe pile under the space-limited condition from the extracted steel pipe pile section;
and S7, repeating the steps of S2-S6, and constructing the next section of the steel pipe pile until all sections of the current steel pipe pile are removed.
6. The construction method of the new device for water drawing the steel pipe pile under the space-limited condition according to claim 5, wherein in the step S3, when the top of the steel pipe pile is provided with the connecting flange, the connecting flange is positioned at the top opening of the steel pipe pile and is matched and abutted with the flange, a gasket is arranged between the connecting flange and the flange, and then the flange and the connecting flange are fixedly connected through a plurality of bolts;
when the top of the steel pipe pile is not provided with a connecting flange, a sleeve is arranged on the inner side wall of the bottom of the blocking head, a plurality of pressing mechanisms are arranged at the bottom of the flange, and then the push rod of the driving cylinder is vertically pushed downwards until the free end of the pressing rod is matched and pressed with the outer side wall of the steel pipe pile.
7. The method of constructing a new apparatus for water drawing a steel pipe pile under space limitation according to claim 5, wherein in S4, the air tightness of the new apparatus for water drawing a steel pipe pile under space limitation is verified before the actual water injection, comprising: 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 the 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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| 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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| CN114045831A (en) | 2022-02-15 |
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