Orifice pipe insertion casting method and orifice pipe float device under deep water condition

Abstract

The present application relates to the technical field of deep water grouting, and discloses a method for embedding and casting a pipe orifice under deep water conditions and a pipe orifice float device, which comprises two symmetrical float mechanisms and a connecting piece; the connecting piece comprises a rotating piece, an annular seat, arc-shaped fixing pieces and elastic clamps; the two arc-shaped fixing pieces are detachably connected and fixed to the steel pipes; the elastic clamps are arranged on the inner sides of the arc-shaped fixing pieces, and the upper outer walls of the elastic clamps form second inclined surfaces; the annular seat is detachably connected to the arc-shaped fixing pieces; the rotating piece is threadedly connected to the annular seat; the lower inner side of the rotating piece is provided with a first inclined surface; when the rotating piece moves downward, the elastic clamps are clamped at the connection between the two steel pipes; the float mechanisms are detachably fixed to the connecting piece, and the two float mechanisms enclose an annular cylinder. The present application can solve the problem that the existing float device has a large resistance to water flow and cannot ensure the perpendicularity of the pipe orifice.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep water grouting, in particular to a method for embedding and casting an orifice pipe under deep water conditions and a floating device for the orifice pipe. BACKGROUND

[0002] After a long period of operation, hydropower stations and reservoir dams will produce a certain amount of leakage, and the leakage position is located underwater. Underwater leakage treatment can usually be treated by grouting. In order to ensure the economic benefits of reservoirs and hydropower stations and the working conditions that the reservoir cannot be emptied, grouting operations are usually carried out under water storage conditions.

[0003] In order to ensure that the grouting material does not enter the water body, a large-diameter orifice pipe (a geological steel pipe with a larger diameter than a drill pipe) is usually installed in the rock layer to the water surface platform, and drilling and grouting operations are directly performed in the orifice pipe.

[0004] The orifice pipe has a length of several tens of meters in water, therefore, the orifice pipe is usually connected by multiple geological steel pipes. In order to reduce the influence of the weight of the orifice pipe on its stability, the prior art usually sets a floating device at the connection of the geological steel pipe, such as the floating device for deep water grouting disclosed in CN206358332U, which detachably connects two square cavity floating mechanisms at the connection of the steel pipe. Although the floating device can reduce the sinking weight of the orifice pipe in water, thereby reducing the bearing stress of the connection, the two square cavity floating mechanisms are connected by setting wing plates on both sides and connecting the wing plates by bolts, but the wing plates have a large resistance to water flow, which has a large influence on the square cavity floating device and cannot ensure the perpendicularity of the orifice pipe over time. SUMMARY

[0005] The purpose of the present application is to provide an orifice pipe floating device to solve the problem that the existing floating device has a large resistance to water flow and cannot ensure the perpendicularity of the orifice pipe.

[0006] In addition, the present application also provides a method for embedding and casting an orifice pipe under deep water conditions based on the above-mentioned orifice pipe floating device.

[0007] The present application is achieved by the following technical solutions:

[0008] An orifice pipe floating device, comprising two symmetrically arranged floating mechanisms, and a connecting piece; the connecting piece comprises a rotating piece, an annular seat, an arc-shaped fixing piece and an elastic clamping piece;

[0009] The arc-shaped fixing piece is provided with two arc-shaped fixing pieces which are detachably connected and fixed on the steel pipe;

[0010] The elastic clamping piece is arranged in the inner side of the arc-shaped fixing piece, and the upper outer wall of the elastic clamping piece is arranged as a second inclined surface;

[0011] The annular seat is detachably connected with the arc-shaped fixing piece;

[0012] The rotating piece is threadedly connected with the annular seat, and the rotating piece can be displaced up and down relative to the annular seat by rotating the rotating piece; the lower inner side of the rotating piece is provided with a first inclined surface matched with the second inclined surface;

[0013] When the rotating piece is moved downward, the elastic clamping piece is tightly clamped at the connecting position of the two steel pipes;

[0014] The buoyancy mechanisms are detachably fixed on the connecting piece, and the two buoyancy mechanisms enclose an annular cylinder.

[0015] The buoyancy mechanism of the present application discards the way of arranging the wing plate on the outer wall of the traditional square cavity to fix the two buoyancy mechanisms on the steel pipe, and the two buoyancy mechanisms of the present application enclose an annular cylinder, which has smaller resistance and better adaptability to complex water flow compared with the buoyancy device in CN206358332U, thereby reducing the problem that the verticality of the orifice pipe is reduced due to the large resistance of the buoyancy device. That is, the orifice pipe buoyant device of the present application provides buoyancy for the orifice pipe, which on the one hand uses the buoyancy of multiple orifice pipe buoyant devices to segmentally resist the gravity of the long orifice pipe, thereby avoiding the instability and bending of the long orifice pipe due to gravity and ensuring the verticality thereof; on the other hand, the buoyancy mechanism of the annular cylinder reduces the problem that the verticality of the orifice pipe is reduced due to the large resistance of the buoyancy device to the complex water flow, thereby ensuring the verticality of the orifice pipe when the orifice pipe buoyant device of the present application is used.

[0016] The present application fixes the buoyancy mechanism on the orifice pipe by arranging a connecting piece inside the buoyancy mechanism, and the elastic clamping piece arranged on the connecting piece can tightly press the connecting position of the orifice pipe, thereby further reinforcing the connecting position of the orifice pipe without affecting the mechanical properties of the connecting position, and improving the stability of the orifice pipe; the present application can avoid the problem of breaking of the connecting position of the orifice pipe by arranging the buoyancy mechanism.

[0017] A semicircular cavity is formed in the semicircular shell;

[0018] The gas inlet pipe and the drain pipe are both communicated with the semicircular cavity, the gas inlet pipe is used for introducing gas into the semicircular cavity, and the drain pipe is used for draining liquid in the semicircular cavity;

[0019] The top and bottom of the semicircular shell are respectively provided with a top cover and a bottom plate; the inner sides of the top cover and the bottom plate are protruded from the semicircular shell, so that a space for accommodating the connecting piece is formed between the top cover and the bottom plate.

[0020] The structure improvement of the buoyancy mechanism is adapted to the structure of the connecting piece.

[0021] In a preferred mode, when the two buoyancy mechanisms are fixed on the connecting piece, the two buoyancy mechanisms are sealingly connected, and the top cover and the bottom plate are sealingly abutted against the steel pipe.

[0022] The structure of the present application can form a closed space between the two buoyancy mechanisms, reducing the influence of water in the water body on the rotation of the rotating piece of the connecting piece.

[0023] In a preferred mode, the top of the top cover is provided with an arc-shaped plate, which has elasticity.

[0024] The two top covers enclose an annular plate with an inner diameter consistent with the outer diameter of the steel pipe.

[0025] The top of the top cover is provided with a clamping piece for clamping and fixing the arc-shaped plate on the outer wall of the steel pipe.

[0026] The structure of the present application not only enables the sealing connection between the two top covers and the steel pipe, but also ensures the stability of the sealing connection between the top cover and the steel pipe through the clamping piece and the arc-shaped plate.

[0027] In a preferred mode, the clamping piece includes a strip-shaped plate, a spring, a support rod and a clamping block.

[0028] The strip-shaped plate is fixed on the top of the top cover.

[0029] The support rod is provided with two support rods, which are symmetrically arranged on both sides of the strip-shaped plate, and one end of the support rod is hinged to the strip-shaped plate, and the other end is connected to the clamping block.

[0030] The two ends of the spring are respectively connected to the two support rods, and in operation, the spring is in tension, and the two clamping blocks are clamped on the arc-shaped plate on the steel pipe by the restoring force of the spring.

[0031] The clamping piece of the structure of the present application is simple in structure, and the arc-shaped plate is clamped on the steel pipe by using the elastic restoring force and the two-point positioning mode, thereby improving the sealing between the arc-shaped plate and the steel pipe.

[0032] In a preferred mode, the clamping block is an arc-shaped block matched with the arc-shaped plate.

[0033] In a preferred mode, the inner wall of the semicircular shell is provided with a first connecting plate and a second connecting plate.

[0034] The arc-shaped fixing piece is provided with a first fixing groove and a second fixing groove matched with the first connecting plate and the second connecting plate respectively.

[0035] In a preferred mode, the bottom of the arc-shaped fixing member is provided with a threaded through hole communicated with the second fixing groove, and the hole mouth pipe float device further comprises a fastening bolt; the second connecting plate is provided with a threaded hole, and the fastening bolt is fixed in the threaded hole through the threaded through hole.

[0036] The bolt and the connecting plate are matched, the connecting plate is inserted on the arc-shaped fixing member in the radial direction, the fastening bolt is inserted into the arc-shaped fixing member in the axial direction and connected with the second connecting plate, the second connecting plate can be locked, the second connecting plate is prevented from being separated from the connecting member under the impact of strong water flow, and the structural stability of the floating force mechanism connected to the connecting member is improved.

[0037] In a preferred mode, the longitudinal section of the arc-shaped fixing member is in L-shaped structure, the inner wall of the arc-shaped fixing member is provided with a limiting plate, and the lower part of the elastic clamping member is arranged between the limiting plate and the horizontal segment of the L-shaped structure.

[0038] The above arrangement of the present application can improve the stability of the elastic clamping member fixed on the inner side of the arc-shaped fixing member.

[0039] A hole mouth pipe embedding and casting method under deep water conditions comprises the following steps:

[0040] S1, drilling preparation: including construction preparation, erection of water surface operation platform, cleaning of accumulated layer and determination of accurate drilling opening position;

[0041] S2, the drill rod with a drill bit is lowered section by section, and the drill rod is pulled to the positioning steel bar by the underwater robot, then the drill rod is further lowered to make the drill bit cover the positioning steel bar, and drilling is started;

[0042] S3, after a section of drilling is completed, all drill rods are pulled up, the core sample is checked to determine the geological conditions of the section of stratum, the drill bit is checked or replaced, and the inflatable capsule is installed at the designed position of the bottom section of the drill rod hole;

[0043] S4, the air bag device is lowered into the drilled hole together with the drill rod, and there is a distance between the drill bit and the hole bottom;

[0044] S5, after the air bag is inflated and jammed in the hole, grout is poured into the drill rod, and the grouting is stopped after the hole section does not suck grout, then the air bag is deflated after a period of grouting is closed, the air bag is taken out, the water surface platform operation personnel continue to drill downward, and the drilling is stopped and the drill rod is lifted up when the drilling reaches the designed depth;

[0045] S6, the steel pipes are connected section by section to form a hole mouth pipe, the hole mouth pipe float device is installed at the hole mouth pipe connection according to the designed interval, the floating force mechanism is filled with liquid, then the hole mouth pipe is lowered into the hole from the water surface, the hole mouth closer is directly installed at the hole mouth of the hole mouth pipe for grouting, the valve of the hole mouth closer is closed after the hole does not suck grout, and the hole mouth closer is cured for three days;

[0046] S7, according to the requirement of drilling arrangement, the adjacent orifice pipe is mutually restricted and reinforced, and the part close to the bank is directly connected with the bank for reinforcement; the orifice pipe is embedded and cast after the reinforcement is completed.

[0047] In the orifice pipe embedding and casting method, after grouting is completed, the hole sealing device is lifted and then the drill rod is used to complete grouting, and in this step, a diver is needed to dive and cooperate with the installation of the hole sealing device, or the diver is needed to dive and cut the pipeline to guide the drill rod; meanwhile, the orifice pipe is segmented and opposed to its own gravity by the plurality of float devices, and the elastic clamping piece of the connecting piece is further used to reinforce the connection of the orifice pipe, so as to ensure the perpendicularity, and the cooperative reinforcement between the orifice pipes also ensures the perpendicularity.

[0048] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0049] The connecting piece embedded in the inside of the buoyancy mechanism is used to fix the buoyancy mechanism on the orifice pipe, the two buoyancy mechanisms of the present application enclose a ring cylinder, and have small water flow resistance and adaptability to complex water flow, the orifice pipe float device of the present application uses the buoyancy of the plurality of orifice pipe float devices to segmentally oppose the gravity of the long orifice pipe, so as to avoid the instability and bending of the long orifice pipe caused by the gravity, and ensure the perpendicularity; on the other hand, the buoyancy mechanism of the ring cylinder reduces the problem that the orifice pipe is deviated to reduce the perpendicularity due to the large resistance of the complex water flow to the buoyancy device, so that the perpendicularity of the orifice pipe can be ensured when the orifice pipe float device of the present application is used; the elastic clamping piece of the connecting piece is used to fix the connecting piece on the orifice pipe, and the elastic clamping piece is used to elastically press the connection of the orifice pipe, so as to further reinforce the connection of the orifice pipe without affecting the mechanical properties of the connection of the orifice pipe, and the stability of the orifice pipe can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings:

[0051] Figure 1 A schematic view of the orifice pipe float device of the present application installed at the connection of the steel pipe;

[0052] Figure 2 A schematic view of the orifice pipe float device of the present application installed at the connection of the steel pipe; Figure 1 An enlarged view of part A in FIG. 6;

[0053] Figure 3 A schematic view of the orifice pipe float device of the present application installed at the connection of the steel pipe;

[0054] Figure 4A top view of the top cover of the present application;

[0055] Figure 5 A structural schematic view of the clamping member of the present application.

[0056] Markings in the drawings and corresponding names of parts:

[0057] 1 - buoyancy mechanism;

[0058] 11 - semicircular shell; 12 - top cover; 13 - bottom plate; 14 - semicircular cavity; 15 - air inlet pipe; 16 - drain pipe; 17 - arc-shaped plate; 18 - first connecting plate; 19 - second connecting plate;

[0059] 2 - connecting member;

[0060] 21 - rotating member; 22 - annular seat; 23 - arc-shaped fixing member; 24 - elastic clamping member;

[0061] 211 - first inclined surface; 221 - clamping block; 222 - annular protrusion; 231 - first fixing groove; 232 - second fixing groove; 233 - threaded through hole; 234 - limiting plate; 241 - second inclined surface;

[0062] 3 - fastening bolt;

[0063] 4 - clamping member;

[0064] 41 - strip-shaped plate; 42 - spring; 43 - supporting rod; 44 - clamping block;

[0065] 5 - constraint assembly;

[0066] 100 - steel pipe. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical scheme and advantages of the present application clearer and more comprehensible, the present application will be further described in detail below in combination with embodiments, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, and do not serve as the limitation of the present application, the embodiments described below are a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0068] In the following description, numerous specific details are set forth to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, materials, or methods are not specifically described to avoid obscuring the invention. Unless otherwise specified, the materials, instruments, and reagents used in the following embodiments are commercially available. Unless otherwise specified, the techniques used in the embodiments are conventional methods well known to those skilled in the art.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] Example 1:

[0071] like Figures 1-5 As shown, to address the problems of existing buoyancy devices exhibiting significant resistance in water flow, inability to ensure the verticality of the orifice pipe, and breakage at the orifice pipe connection, this embodiment provides an orifice pipe float device. This device includes two symmetrically arranged buoyancy mechanisms 1 and a connector 2 for mounting the buoyancy mechanisms 1 onto a steel pipe 100. The connector 2 is fixed to the steel pipe 100 and embedded between the two buoyancy mechanisms 1, achieving fixation from the inside of the buoyancy mechanisms 1, thus avoiding the need for external wing plates. Specifically, the connector 2 includes a rotating component 21, an annular seat 22, an arc-shaped fixing component 23, and an elastic clamping component 24.

[0072] Two arc-shaped fasteners 23 are provided, and the two arc-shaped fasteners 23 are detachably connected and fixed to the steel pipe 100. Specifically, the two arc-shaped fasteners 23 can be connected by clamps or bolts to form a ring component fixed to the steel pipe 100. Preferably, a ring support can also be provided below the connection point of the two steel pipes 100 on the outside of the steel pipe 100. The ring support is used to limit the downward displacement of the arc-shaped fasteners 23, which can improve the stability of the two arc-shaped fasteners 23 fixed to the steel pipe 100. The ring support can be a ring protrusion formed by welding or elastic plastic, etc.

[0073] The elastic clamping piece 24 is arranged inside the arc-shaped fixing piece 23, and an upper outer wall of the elastic clamping piece 24 is arranged as a second inclined surface 241. Specifically, the elastic clamping piece 24 can be arranged in one-to-one correspondence with the arc-shaped fixing piece 23, and more specifically, the elastic clamping piece 24 has an arc-shaped bottom plate, and one or two inner walls of the arc-shaped bottom plate are arranged as clamping pieces matched with the outer wall of the steel pipe 100. An upper outer wall of the clamping piece is formed as the second inclined surface 241. When the two arc-shaped fixing pieces 23 are connected, the two arc-shaped bottom plates abut against each other and just enclose an annular plate with an inner diameter consistent with the outer diameter of the steel pipe 100, and the adjacent two clamping pieces have a circumferential spacing. The second inclined surface 241 can be understood as a trend that an upper inner diameter of the annular piece enclosed by the plurality of clamping pieces gradually decreases from bottom to top when the two arc-shaped fixing pieces 23 are connected. The elastic clamping piece 24 can be made of plastic, specifically, silicone.

[0074] In a specific case, the longitudinal section of the arc-shaped fixing piece 23 is in an L-shaped structure, the inner wall of the arc-shaped fixing piece 23 is provided with a limiting plate 234, the arc-shaped bottom plate of the elastic clamping piece 24 is arranged between the limiting plate 234 and the horizontal segment of the L-shaped structure, the side wall of the L-shaped structure radially limits the arc-shaped bottom plate, and the limiting plate 234 and the horizontal segment of the L-shaped structure limit the arc-shaped bottom plate in the radial and axial directions; thereby improving the stability of the elastic clamping piece 24 arranged inside the arc-shaped fixing piece 23.

[0075] The annular seat 22 is detachably connected with the arc-shaped fixing piece 23. Specifically, the annular seat 22 is provided with a clamping block 221 at the bottom, the arc-shaped fixing piece 23 is provided with a groove for embedding the clamping block 221 at the top, and the annular seat 22 is provided with an annular protrusion 222 at the inner wall, and the inner side surface of the annular protrusion 222 is provided with a first screw thread.

[0076] The rotating part 21 is threadedly connected with the annular seat 22, and the rotating part 21 can be displaced up and down relative to the annular seat 22 by rotating the rotating part 21; the lower inner side of the rotating part 21 is provided with a first inclined surface 211 matched with a second inclined surface 241; specifically, the rotating part 21 comprises an annular side plate, the outer wall of the annular side plate is provided with a second thread matched with a first thread, and the inner wall of the lower part of the annular side plate is provided with the first inclined surface 211, that is, the inner diameter of the lower part of the annular side plate has a gradually increasing trend from top to bottom, when the rotating part 21 rotates and moves downward, the diameter difference between the first inclined surface 211 and the second inclined surface 241 is used to make the lower part of the rotating part 21 radially extrude the claws of the elastic clamping part 24, so that the claws of the elastic clamping part 24 are tightly clamped on the steel pipe 100, and the claws and the lower part of the arc-shaped fixing part 23 are tightly clamped on the two ends of the connection part of the steel pipe 100 respectively, so as to fix the connecting part 2 on the connection part of the steel pipe 100. Wherein, the top of the annular side plate extends outward along the radial direction to form an annular platform, the annular platform is located above the annular seat 22, and can be used to rotate the rotating part 21 by external components, and the rotating part 21 can be manually rotated by artificial manual rotation, or a slot can be arranged on the annular platform, and a circular rod is inserted into the slot in interference fit, and the circular rod is rotated by applying force. That is, the connecting part 2 of the embodiment can clamp the elastic clamping part 24 on the connection part of the two steel pipes 100 when the rotating part 21 moves downward.

[0077] The buoyancy mechanism 1 is detachably fixed on the connecting part 2, and the two buoyancy mechanisms 1 form an annular cylinder, which has small resistance to water flow and good adaptability to complex water flow.

[0078] In a specific case, the buoyancy mechanism 1 comprises a semicircular shell 11, an air inlet pipe 15 and a drainage pipe 16;

[0079] The semicircular shell 11 forms a semicircular cavity 14; here, the semicircle is that the arc length of the semicircular shell 11 and the semicircular cavity 14 is a semicircle, but the radial length is less than the diameter of the semicircle, so that when the two buoyancy mechanisms 1 are connected, a circular channel is formed between the two semicircular shells 11, which can be used to pass through the steel pipe 100 and accommodate the connecting part 2.

[0080] The air inlet pipe 15 and the drainage pipe 16 are both communicated with the semicircular cavity 14, the air inlet pipe 15 is used for introducing gas into the semicircular cavity 14, and the drainage pipe 16 is used for draining the liquid in the semicircular cavity 14, which can be water, wherein the air inlet pipe 15 is provided with a first valve, and the drainage pipe 16 is provided with a second valve, both of which are in communication connection with the controller, when the controller controls the first valve and the second valve to open, the gas is introduced into the semicircular cavity 14 through the air inlet pipe 15 to apply pressure to the semicircular cavity 14, and the liquid in the semicircular cavity 14 is drained out of the semicircular cavity 14 through the drainage pipe 16 by using the gas pressure, and the buoyancy of the buoyancy mechanism 1 in water is controlled by controlling the weight of the liquid in the semicircular cavity 14; the top and bottom of the semicircular shell 11 are respectively provided with a top cover 12 and a bottom plate 13; the inner sides of the top cover 12 and the bottom plate 13 are both protruded from the semicircular shell 11, so that a space for accommodating the connecting piece 2 is formed between the top cover 12 and the bottom plate 13.

[0081] In a preferred case, in order to improve the sealing performance of the buoyancy mechanism 1 orifice pipe buoy device and avoid the influence of water on the smooth use of the rotating part of the connecting piece 2, the two buoyancy mechanisms 1 are sealingly connected after being fixed on the connecting piece 2, specifically, a sealing rubber strip can be arranged on the side where the two buoyancy mechanisms 1 are connected, and the top cover 12 and the bottom plate 13 are sealingly abutted with the steel pipe 100, and a sealing rubber strip can be arranged on the inner side wall of the top cover 12 and the bottom plate 13. Preferably, in order to improve the connection stability of the two buoyancy mechanisms 1, at least two constraint assemblies 5 are arranged on the top of the top cover 12, and the constraint assemblies 5 are arranged on both sides of the steel pipe 100, wherein the constraint assembly 5 comprises two ear plates, the two ear plates are respectively arranged on the top of the two top covers 12, and the two ear plates are tightly connected by bolts.

[0082] In a specific case, the inner side wall of the semicircular shell 11 is provided with a first connecting plate 18 and a second connecting plate 19; the first connecting plate 18 and the second connecting plate 19 are arranged in an upper and lower manner, preferably, the second connecting plate 19 corresponds to the horizontal segment of the L-shaped structure; the arc-shaped fixing piece 23 is provided with a first fixing groove 231 and a second fixing groove 232 which cooperate with the first connecting plate 18 and the second connecting plate 19 respectively, when the buoyancy mechanism 1 is fixed on the connecting piece 2, the first connecting plate 18 is inserted into the first fixing groove 231 in an interference fit, and the second connecting plate 19 is inserted into the second fixing groove 232 in an interference fit, and the first connecting plate 18 and the second connecting plate 19 are used to connect the buoyancy mechanism 1 and the connecting piece 2 in the radial direction.

[0083] In a preferred case, the bottom of the arc-shaped fixing member 23 is provided with a threaded through hole 233 communicating with the second fixing groove 232, and the orifice pipe buoy device further comprises a fastening bolt 3; the second connecting plate 19 is provided with a threaded hole, and the fastening bolt 3 is fixed in the threaded hole through the threaded through hole 233, so that the radial displacement of the second connecting plate 19 is limited by the fastening bolt 3, thereby improving the stability of the connection between the buoyancy mechanism 1 and the connecting member 2.

[0084] The working process of the embodiment is as follows:

[0085] First, the two arc-shaped fixing members 23 are fixed on the steel pipes 100, and the contact positions of the arc-shaped fixing members 23 with the steel pipes 100 are lower than the connection positions of the two steel pipes 100; at this time, the elastic clamping members 24 are attached to the outside of the connection positions of the two steel pipes 100, but the elastic clamping members 24 do not have clamping effect on the connection positions of the steel pipes 100, then the annular seat 22 with the rotating member 21 threaded is sleeved on the steel pipe 100 from one end of the steel pipe 100 to move the annular seat 22 until the annular seat 22 is integrated with the two arc-shaped fixing members 23, then the rotating member 21 is rotated to move the rotating member 21 downward, so that the elastic clamping members 24 clamp the connection positions of the two steel pipes 100; then the two buoyancy mechanisms 1 filled with liquid are respectively fixed on the two arc-shaped fixing members 23.

[0086] The embodiment realizes the fixation of the buoyancy mechanism 1 on the orifice pipe by arranging a connecting member 2 inside the buoyancy mechanism 1, and abandons the method of arranging wing plates on the outer wall of the traditional square cavity to realize the fixation of two buoyancy mechanisms 1 on the steel pipe 100; the two buoyancy mechanisms 1 of the embodiment enclose a ring-shaped cylinder, which has smaller water flow resistance and better adaptability to complex water flow; on one hand, the buoyancy of the plurality of orifice pipe buoy devices is used to segmentally resist the gravity of the long orifice pipe, so as to avoid the instability bending of the long orifice pipe caused by the gravity and ensure the perpendicularity of the orifice pipe; on the other hand, the buoyancy mechanism of the ring-shaped cylinder reduces the problem that the verticality of the orifice pipe is reduced due to the large resistance of the complex water flow to the buoyancy device, so that the perpendicularity of the orifice pipe can be ensured when the orifice pipe buoy device of the embodiment is used.

[0087] In addition, the elastic clamping member 24 of the connecting member 2 of the embodiment is arranged to fix the connecting member 2 on the orifice pipe, and the elastic clamping member 24 elastically presses the connection position of the orifice pipe, so that the connection position of the orifice pipe is further reinforced without affecting the mechanical properties of the connection position of the orifice pipe, thereby improving the stability of the orifice pipe.

[0088] Embodiment 2:

[0089] As Figures 1-5As shown, this embodiment is based on embodiment 1. An arc-shaped plate 17 is provided on the inner side of the top of the top cover 12. The arc-shaped plate 17 is elastic. The arc-shaped plate 17 can be made of plastic or silicone. The two top covers 12 form an annular plate with an inner diameter that is the same as the outer diameter of the steel pipe 100.

[0090] The top of the top cover 12 is provided with a clamping member 4, which is used to clamp and fix the arc plate 17 to the outer wall of the steel pipe 100.

[0091] In a specific example, the clamping component 4 includes a strip plate 41, a spring 42, a support rod 43, and a clamping block 44. The strip plate 41 is fixed to the top of the top cover 12. Two support rods 43 are provided, symmetrically arranged on both sides of the strip plate 41. One end of the support rod 43 is hinged to the strip plate 41, and the other end is connected to the clamping block 44. Both ends of the spring 42 are connected to the two support rods 43 respectively. During operation, the spring 42 is always in a stretched state, and the restoring force of the spring 42 is used to clamp the arc plate 17 onto the steel pipe 100 using the two clamping blocks 44. Preferably, the clamping block 44 is an arc-shaped block that cooperates with the arc plate 17.

[0092] The clamping member 4 in this embodiment has a simple structure. It uses the restoring force of the spring 42 to clamp the arc plate 17 onto the steel pipe 100 using a two-point positioning method, thereby improving the sealing between the arc plate 17 and the steel pipe 100.

[0093] Example 3:

[0094] A method for inserting orifice tubes under deep-water conditions includes the following steps:

[0095] S1. Pre-drilling preparation: This includes construction preparation, setting up a surface work platform, clearing silt, and determining the accurate location for drilling; specifically:

[0096] S11. Construction preparation: This includes the placement of drilling rigs and construction equipment, the entry of construction personnel, and the determination of drilling locations.

[0097] S12. Construct a surface work platform on the water surface of the dam, use a surveying instrument to measure the hole positions, the hole positions are the projections of the underwater curtain grouting design borehole positions on the work platform, and install drilling rigs and drilling towers at the hole positions.

[0098] S13. Divers will descend into the water to investigate the underwater silt layer in the borehole area. If the silt layer is thin, such as no more than 50 cm, a high-pressure water gun will be used to flush away the top layer of silt.

[0099] S14. When divers go underwater, they carry measuring devices to measure the corresponding position of the underwater opening and determine the accurate position of the drilling opening by means of the relative position of the underwater structure. At that position, they use an underwater hammer drill to install positioning steel bars.

[0100] S2, from the water surface platform on the hole site with drill pipe with drill bit down, the front end configuration core drill pipe rear configuration conventional drill pipe, after the close to the bottom of the water, take the underwater robot to grab the drill pipe, underwater robot will drill pipe to the positioning reinforcement, and then continue to put down to make the drill bit set on the positioning reinforcement, start drilling.

[0101] S3, after completing a section of drilling, pull up all the drill pipe, and check the core sample to determine the geological conditions of the stratum, check or replace the drill bit, measure 1.9m from the drill bit and install an inflatable capsule on the drill pipe. The air bag is about 50-60cm long. The air bag has an inflation nozzle. The inflation nozzle is connected to the inflation pipeline by a pneumatic clamping device. The pneumatic clamping device is pulled by a steel wire rope.

[0102] S4, the air bag device is lowered into the drilled hole together with the drill pipe from the water surface. The underwater robot can guide the drill pipe to accurately enter the hole. The drill bit is not more than 50cm from the bottom of the hole.

[0103] S5, after the air bag is inflated and jammed in the hole, grout is poured into the drill pipe. When the hole section does not absorb grout, stop pouring grout. After a period of time, the pneumatic clamping device releases the air nozzle, disconnecting the air pipe from the air nozzle. After the air bag deflates, it returns to its original state. The water surface operation platform operator removes the pneumatic clamping device and the air pipe from the water. The water surface platform operator continues to drill downward. When the drilling reaches the predetermined depth, stop drilling and raise the drill pipe.

[0104] Steps S4-S5 solve the problem of lifting the hole sealing device after grouting is completed and then lowering the drill pipe to complete grouting. This step requires a diver to dive and assist in installing the hole sealing device, or the diver to dive and cut the pipeline to guide the drill pipe.

[0105] S6, regularly arrange a certain number of small holes on the first section of the orifice pipe. The top end of the orifice pipe is wrapped with hemp silk 500cm backward. The overall hemp silk wrapping is conical and cellulose ether or polyacrylamide or sodium alginate needs to be added during the hemp silk wrapping process. Connect the steel pipes 100 to form the orifice pipe. Specifically, the direct connection of each subsequent section of the orifice pipe is connected by a nipple and needs to be additionally welded and reinforced. At the same time, the orifice pipe float device as described in Embodiment 1 or Embodiment 2 is installed at the orifice pipe connection according to the designed spacing, so that the buoyancy mechanism 1 is filled with liquid. Then, the orifice pipe is lowered into the hole from the water surface section by section. The end of the orifice pipe can be guided by an underwater robot when it enters the hole. The orifice pipe is jammed in the hole, and the orifice closer is directly installed at the orifice of the orifice pipe for grouting. After the hole does not absorb grout, close the orifice closer valve. After three days of curing.

[0106] S7, according to the requirements of arranging the drilling, the adjacent orifice pipes are mutually restricted and reinforced, and the parts close to the shore are directly connected to the shore for reinforcement. After the reinforcement is completed, the orifice pipe inlaying and casting is completed.

[0107] The above detailed description of the application is only a specific embodiment of the application, and is not intended to limit the protection scope of the application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

[0108] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to understand and read the content disclosed by the present specification, and do not have technical significance to limit the implementation conditions of the present application. Any modification, change of proportional relationship, or adjustment of size, which does not affect the effects and purposes of the present application, shall still fall within the scope of the disclosed technology. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", etc. in the present specification are only for the convenience of clear description, and are not intended to limit the implementation scope of the present application. The change or adjustment of relative relationship, without substantial change of technical content, is also considered as the implementation scope of the present application.

Claims

1. An orifice pipe buoyant device comprising two symmetrically arranged buoyancy means (1), characterized in that, It also includes a connecting piece (2); the connecting piece (2) includes a rotating piece (21), an annular seat (22), an arc-shaped fixing piece (23) and an elastic clamping piece (24); The arc-shaped fixing piece (23) is provided with two arc-shaped fixing pieces (23) which are detachably connected and fixed on the steel pipe (100); The elastic clamping piece (24) is arranged on the inner side of the arc-shaped fixing piece (23), and the upper outer wall of the elastic clamping piece (24) is provided as a second inclined surface (241); The annular seat (22) is detachably connected with the arc-shaped fixing piece (23); The rotating piece (21) is threadedly connected with the annular seat (22), and the rotating piece (21) can be displaced up and down relative to the annular seat (22) by rotating the rotating piece (21); the lower inner side of the rotating piece (21) is provided with a first inclined surface (211) matched with the second inclined surface (241); When the rotating piece (21) moves downward, the elastic clamping piece (24) is clamped tightly at the connection of the two steel pipes (100); The buoyancy mechanism (1) is detachably fixed on the connecting piece (2), and the two buoyancy mechanisms (1) enclose an annular cylinder.

2. The riser buoy device of claim 1, wherein, The buoyancy mechanism (1) includes a semicircular shell (11), an air inlet pipe (15) and a drainage pipe (16); A semicircular cavity (14) is formed in the semicircular shell (11); The air inlet pipe (15) and the drainage pipe (16) are both in communication with the semicircular cavity (14), the air inlet pipe (15) is used for introducing gas into the semicircular cavity (14), and the drainage pipe (16) is used for discharging liquid in the semicircular cavity (14); The top and bottom of the semicircular shell (11) are respectively provided with a top cover (12) and a bottom plate (13); the inner sides of the top cover (12) and the bottom plate (13) are protruded from the semicircular shell (11), so that a space for accommodating the connecting piece (2) is formed between the top cover (12) and the bottom plate (13).

3. The riser buoy apparatus of claim 2, wherein, When the two buoyancy mechanisms (1) are fixed on the connecting piece (2), the two buoyancy mechanisms (1) are sealingly connected, and the top cover (12) and the bottom plate (13) are both sealingly abutted against the steel pipe (100).

4. The orifice tube floatation device of claim 2, wherein, The inner side of the top of the top cover (12) is provided with an arc-shaped plate (17), and the arc-shaped plate (17) is elastic; The two top covers (12) enclose an annular plate with an inner diameter consistent with the outer diameter of the steel pipe (100); The top of the top cover (12) is provided with a clamping piece (4), and the clamping piece (4) is used for clamping and fixing the arc-shaped plate (17) on the outer wall of the steel pipe (100).

5. The riser buoy apparatus of claim 4, wherein, The clamping piece (4) includes a strip-shaped plate (41), a spring (42), a support rod (43) and a clamping block (44); The strip-shaped plate (41) is fixed on the top of the top cover (12); The support rod (43) is provided with two support rods (43) which are symmetrically arranged on the two sides of the strip-shaped plate (41), one end of the support rod (43) is hingedly connected with the strip-shaped plate (41), and the other end is connected with the clamping block (44); Two ends of the spring (42) are connected with two support rods (43) respectively, and the spring (42) is in a stretching state during operation, and the two clamping blocks (44) clamp the arc-shaped plate (17) on the steel pipe (100) by the restoring force of the spring (42).

6. The riser buoy apparatus of claim 5, wherein, The clamping block (44) is an arc-shaped block matched with the arc-shaped plate (17).

7. The orifice tube buoyant device of claim 2, wherein, First and second connecting plates (18) and (19) are arranged on the inner wall of the semicircular shell (11). The arc-shaped fixing member (23) is provided with first and second fixing grooves (231) and (232) matched with the first and second connecting plates (18) and (19) respectively.

8. The riser buoy apparatus of claim 7, wherein, The bottom of the arc-shaped fixing member (23) is provided with a threaded through hole (233) communicated with the second fixing groove (232), and the aperture pipe float device further comprises a fastening bolt (3); the second connecting plate (19) is provided with a threaded hole, and the fastening bolt (3) is fixed in the threaded hole through the threaded through hole (233).

9. The riser tube buoyancy device of claim 2, wherein, The longitudinal section of the arc-shaped fixing member (23) is in L-shaped structure, the inner wall of the arc-shaped fixing member (23) is provided with a limiting plate (234), and the lower part of the elastic clamping member (24) is arranged between the limiting plate (234) and the horizontal segment of the L-shaped structure.

10. A method for orifice pipe installation under deep-water conditions, wherein the orifice pipe float device as described in any one of claims 1-9 is employed, characterized in that, The method comprises the following steps: S1, drilling preparation: including construction preparation, erection of water surface operation platform, cleaning of silt layer and determination of accurate drilling opening position; S2, the drill rod with a drill bit is lowered section by section, and the drill rod is pulled to the positioning steel bar by the underwater robot, then the drill bit is sleeved on the positioning steel bar by further lowering, and drilling is started; S3, after a section of drilling is completed, all drill rods are pulled up, and the geological conditions of the section of stratum are determined by checking the core sample, the drill bit is checked or replaced, and the inflatable capsule is installed at the designed position of the bottom section of the drill rod hole; S4, the air bag device is lowered into the drilled hole together with the drill rod, and there is a distance between the drill bit and the hole bottom; S5, after the air bag is inflated and blocked in the hole, grout is poured from the drill rod, and the grouting is stopped after the hole section does not suck grout, then the air bag is deflated after a period of grouting, the air bag is taken out, and the water surface platform operator continues to drill downward, and drilling is stopped and the drill rod is lifted up when the drilling reaches the designed depth; S6, the steel pipe (100) is connected section by section to form an aperture pipe, the aperture pipe float device is installed at the aperture pipe connection at the designed interval, and the float mechanism (1) is filled with liquid; then the aperture pipe is lowered into the hole from the water surface; the aperture closer is directly installed at the aperture of the aperture pipe for grouting, the valve of the aperture closer is closed after the grouting is completed, and the grouting is cured for three days; S7, according to the requirement of drilling arrangement, the adjacent aperture pipes are mutually restricted and reinforced, and the part close to the shore is directly connected with the shore for reinforcement; the aperture pipe inlaying and casting are completed after the reinforcement is completed.

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