Orifice pipe imbedding method under deepwater condition and inflatable bag

Abstract

The invention discloses an orifice pipe imbedding method and an inflatable bag under a deepwater condition, and relates to the field of orifice pipe imbedding, and the method comprises the following steps: S1, construction preparation: placing a drilling machine and construction equipment in place, entering constructors and assembling the construction equipment; s2, a hole position is determined, specifically, a diver enters the water to observe a deposition layer of the underwater part of the drilling area and determine the hole position; s3, drilling is started, and a drill rod with a drill bit is lowered from the water surface platform to the hole site section by section for drilling; s4, air bag inflation and drilling grouting are conducted, all drill rods are pulled up, core samples are checked to determine the geological condition of the stratum of the section, a drill bit is replaced, the air bag is used, an arc-shaped groove is formed, the physical contact area and friction force between the air bag and the external hole wall are increased, the functionality of the air bag in underwater drilling grouting application is improved, and the service life of the air bag is prolonged. The reliability and the safety of the air bag in the using process are further enhanced, and meanwhile the auxiliary mechanism can enable the air bag to be expanded more smoothly, stably and evenly.

Description

Technical Field

[0001] The invention relates to the field of orifice pipe casting, in particular to an orifice pipe casting method and an inflatable bag under deep water conditions. Background Art

[0002] Orifice tube casting technology is usually used in curtain grouting construction in water conservancy and hydropower projects, especially in deep water conditions. This technology can effectively solve the problem of orifice tube casting when the water depth is greater than 60m during orifice closure grouting, ensuring the grouting quality and project safety. Under complex geological conditions such as high head, large water gushing cracks and dense cracks, traditional grouting construction methods may be difficult to meet the construction quality requirements, so special technologies and processes are needed to meet these challenges. Under deep water conditions, it is difficult to achieve orifice closure grouting, which will bring difficulties to grouting construction, and the orifice tube casting technology can easily achieve orifice closure grouting under deep water conditions, ensuring the smooth progress of grouting operations.

[0003] In the prior art, in order to ensure the economic benefits of reservoirs and hydropower stations and to avoid emptying the reservoir, grouting operations are carried out directly under water storage conditions. In order to ensure that the grouting material does not enter the water body during grouting in deep water areas, an orifice sealer needs to be installed at the orifice. However, the installation of the orifice sealer under water storage conditions requires divers to frequently go up and down to install it, which is inefficient. In addition, when using the sealing device, divers need to dive to cooperate with the installation of the sealing device, or they need to dive to guide the drill rod, which makes the operation process cumbersome and inefficient. Summary of the invention

[0004] The purpose of the present invention is to provide a method for casting a borehole pipe under deep water conditions and an inflatable bag to solve the problem of low efficiency of the above-mentioned divers frequently going up and down to install the construction. It also solves the problem of needing to seal the underwater borehole for grouting after the underwater drilling is completed, and finally realizes the direct sealing and grouting of the borehole by the drill rod while continuing to complete the subsequent drilling and grouting operations.

[0005] The present invention is achieved through the following technical solutions: A method for casting a borehole pipe under deep water conditions comprises the following steps: S1, construction preparation, including the positioning of drilling rigs and construction equipment, the entry of construction personnel and the assembly of construction equipment; S2, determine the hole position, the diver goes into the water to observe the siltation layer in the underwater part of the drilling area and determine the hole position; S3, start drilling, lower the drill rod with the drill bit section by section from the surface platform to the hole position to drill the hole; S4, air bag inflation, drilling and grouting, pull up all drill rods, check the core sample to determine the geological conditions of the stratum, replace the drill bit, measure 1.9m back from the drill bit and install the air bag on the drill rod. The air bag is about 50-60cm long and has its own inflation nozzle. The inflation nozzle is connected to the inflation pipeline with a pneumatic clamping device. The pneumatic clamping device is pulled by a wire rope. The air bag and the drill rod are lowered from the water surface to the drilled hole. Underwater robots can be used to guide the drill rod into the hole accurately. The drill bit needs to be 50cm away from the bottom of the hole. The air bag is inflated to make the drill rod stuck in the hole. Through the arc groove set on the surface, it expands more stably and firmly in the borehole. Then grout is poured from the drill rod. When the hole is no longer filled with grout, stop pouring. The grout is then closed for a period of time, and the pneumatic clamping device releases the air nozzle to separate the air pipe from the air nozzle. The airbag returns to its original state after being deflated. The surface platform staff takes the pneumatic clamping device and the air pipe out of the water, and the surface platform staff continues to drill downwards. After the hole reaches the predetermined depth, the drilling is stopped and the drill rod is lifted, which solves the problem that the sealing device needs to be lifted before the drill rod is lowered to complete the grouting after the grouting is completed. The step of lifting the sealing device requires the diver to dive to cooperate with the installation of the sealing device, or the diver to dive to guide the drill rod. The process is cumbersome. The arc groove not only improves the functionality of the airbag in the application of underwater drilling and grouting, but also further enhances the reliability and safety of the airbag during use. S5, orifice pipe casting: the orifice pipe is lowered from the water surface into the hole section by section, reinforced and the orifice pipe casting is completed.

[0006] Furthermore, the step S1 specifically includes setting up a surface operating platform on the water surface of the dam reservoir area, measuring the hole positions using a surveying instrument, the hole positions being projections of the drilling hole positions designed for underwater curtain grouting on the operating platform, and installing a drilling rig and a drilling tower at the hole positions of the operating platform.

[0007] Furthermore, the S2 step specifically includes divers going into the water to investigate the silt layer in the underwater part of the drilling area. If the thickness of the silt is thin and not more than 50 cm, a high-pressure water gun is used to wash away the silt covering the upper part. The divers dive and carry a measuring device with them to measure the corresponding position of the underwater opening. Then, the accurate position of the drilling hole is determined by the relative position of the underwater structure, and the positioning steel bars are installed at this position by an underwater hammer drill.

[0008] Furthermore, the S3 step specifically includes lowering the drill rod with the drill bit section by section from the surface platform to the hole position, with the front end being equipped with a coring drill rod and the rear end being equipped with a conventional drill rod. After the drill rod is lowered to almost the bottom of the water, an underwater robot is used to grab the drill rod. After the underwater robot pulls the drill rod to the positioning steel bar, the drill rod is lowered and put on the positioning steel bar.

[0009] Furthermore, the S5 step specifically includes regularly arranging a certain number of small holes on the first section of the orifice tube, winding hemp thread 500 cm backward from the top of the orifice tube, the hemp thread is wrapped in a cone shape as a whole, and cellulose ether or polyacrylamide or sodium alginate needs to be added during the hemp thread winding process, which can effectively fill the tiny gaps at the threaded connection of the pipe to prevent moisture and other impurities from penetrating, thereby ensuring the sealing of the connection part.

[0010] Furthermore, the S5 step specifically includes that the connection method of each subsequent section of the orifice pipe needs to be reinforced by welding in addition to the threaded connection, and the spare parts are reinforced according to the preset welding parts.

[0011] Furthermore, the S5 step also includes lowering the orifice pipe section by section from the water surface into the hole, and an underwater robot can be used to guide the end when entering the hole. Since the orifice pipe is stuck in the hole due to the hemp fibers, an orifice sealer is directly installed at the orifice pipe mouth for grouting. After the grout stops being absorbed, the orifice sealer valve is closed and left to solidify for three days.

[0012] Furthermore, the step S5 further includes: According to the needs of drilling arrangement, adjacent orifice pipes are reinforced to restrict each other, and at the same time, the parts close to the shore are directly connected to the shore for reinforcement. After the reinforcement is completed, the orifice pipe is cast.

[0013] An inflatable bag for casting a hole-mouth pipe under deep-water conditions, used in the above-mentioned method for casting a hole-mouth pipe under deep-water conditions, comprising: The airbag is detachably mounted on the outside of the drill rod, an inflation nozzle is fixedly mounted on the top of the airbag, a plurality of arc-shaped grooves are opened on the surface of the airbag, and the arc-shaped grooves are evenly distributed in a circle.

[0014] Furthermore, an auxiliary mechanism is also provided inside the airbag, the auxiliary mechanism includes a slip ring, the slip ring is slidably sleeved on the inner side wall of the center of the airbag, a pull rod is rotatably installed at the bottom of the slip ring, and the bottom of the pull rod is rotatably installed on the inner side wall of the outermost end of the airbag, a telescopic rod is fixedly installed on the outside of the slip ring, and a curved top plate is fixedly installed on the movable end of the telescopic rod, the outer side of the curved top plate is fitted to the inner side wall of the airbag, a semicircular ring is fixedly installed on the outside of the curved top plate, an curved groove is provided on the inner side wall of the airbag, and the semicircular ring is slidably sleeved on the curved groove, and there are three groups of pull rods, telescopic rods, curved top plates, semicircular rings and curved grooves, and the three groups of pull rods, telescopic rods, curved top plates, semicircular rings and curved grooves are symmetrically distributed about the center of the slip ring, and the inner side wall of the airbag is smoother through the auxiliary scraping of the curved top plate, and the sliding of the curved top plate can provide an auxiliary expansion effect, so that the overall expansion of the airbag is more stable and uniform.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention achieves a sealing effect during drilling and grouting by using an air bag on the drill rod, thereby solving the problem that after grouting, the sealing device needs to be lifted and then the drill rod needs to be lowered to complete the grouting. If the sealing device is lifted, the diver needs to dive to cooperate with the installation of the sealing device, or the diver needs to dive to guide the drill rod, which will lead to cumbersome operation. 2. The present invention can increase the physical contact area and friction between the airbag and the external hole wall by providing arc grooves, thereby enhancing the stability and adhesion under the action of water pressure and other external forces, and the arc grooves designed with uniform distribution can disperse the stress concentration points of the airbag under high pressure environment, prevent local excessive expansion or rupture, and enhance the safety and life of the overall structure. At the same time, the arc grooves enable the airbag to better fit the hole wall and maintain good sealing when encountering an uneven hole wall environment or a hole wall environment with impurities on the surface. By providing arc grooves on the surface of the airbag, not only the functionality of the airbag in underwater drilling and grouting applications is improved, but also the reliability and safety of the airbag during use are further enhanced; 3. The present invention sets an auxiliary mechanism in the airbag. During the downward movement of the slip ring, the telescopic rod pulls the arc-shaped top plate to move downward together and the arc-shaped top plate always fits the inner wall of the airbag. Due to the setting of the arc-shaped groove, due to pressure or accumulation of impurities underwater, bulges are easily generated at the corresponding positions of the arc-shaped grooves on the inner wall of the airbag. In this way, the auxiliary scraping of the arc-shaped top plate makes the inner wall of the airbag smoother, and the sliding of the arc-shaped top plate can provide an auxiliary expansion effect, so that the overall expansion of the airbag is more stable and uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a schematic diagram of the method flow of the present invention; Figure 2 is a schematic diagram of the external structure of the airbag; Figure 3 It is a schematic diagram of the internal structure of the airbag in a front view; Figure 4 It is a schematic diagram of the internal structure of the airbag from a top view; Figure 5 It is a schematic diagram of the external local structure of the slip ring; Figure 6 It is a schematic diagram of the external partial structure of the arc chute.

[0017] The reference numerals represent: 1-air bag, 2-drill rod, 3-inflating nozzle, 4-arc groove, 5-slip ring, 6-pull rod, 7-telescopic rod, 8-arc top plate, 9-semicircular ring, 10-arc slide groove. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0019] like Figures 1 to 6 As shown, the present invention provides a method for casting a borehole pipe under deep water conditions, comprising the following steps: S1, construction preparation, including the positioning of drilling rigs and construction equipment, the entry of construction personnel and the assembly of construction equipment: Specifically, it includes setting up a surface operating platform on the water surface of the dam reservoir area, using a surveying instrument to measure the hole positions, the hole positions are the projections of the drilling hole positions designed for underwater curtain grouting on the operating platform, and installing a drilling rig and a drilling tower at the hole positions of the operating platform.

[0020] S2, determine the hole position. Divers go into the water to observe the siltation layer in the underwater part of the drilling area and determine the hole position: Specifically, divers go into the water to investigate the silt layer in the underwater part of the drilling area. If the thickness of the silt is thin and not more than 50 cm, a high-pressure water gun is used to flush the silt covering the upper part. Divers dive and carry measuring devices with them to measure the corresponding position of the underwater opening. Then, the exact position of the drilling hole is determined through the relative position of the underwater structure, and the positioning steel bars are installed at this position through an underwater hammer drill.

[0021] S3, start drilling, lower the drill rod with drill bit to the hole position section by section from the surface platform to drill: Specifically, the drill rod is lowered section by section from the surface platform to the hole, with a coring drill rod at the front end and a conventional drill rod at the rear end. After it is lowered to almost the bottom of the water, an underwater robot is used to grab the drill rod. After the underwater robot pulls the drill rod to the positioning steel bar, the drill rod is lowered and put on the positioning steel bar.

[0022] S4, airbag inflation, drilling and grouting: Specifically, after completing a section of drilling, all drill rods are pulled up, and the core sample is checked to determine the geological conditions of the stratum in this section. The drill bit is replaced, and an air bag 1 is installed on the drill rod 2 1.9m back from the drill bit. The air bag 1 is about 50-60cm long and has an inflation nozzle 3. The inflation nozzle 3 is connected to the inflation pipeline by a pneumatic clamping device. The pneumatic clamping device is pulled by a wire rope. The air bag 1 and the drill rod 2 are lowered from the water surface to the drilled hole. An underwater robot can be used to guide the drill rod to enter the hole accurately. The drill bit needs to be 5 meters away from the bottom of the hole. 0cm, the airbag 1 is inflated to make the drill rod stuck in the hole, and expands in the drill hole more stably and firmly through the arc-shaped groove 4 arranged on the surface. Then grouting is poured from the drill rod. Grouting is stopped when the hole is no longer filled with grout. After the grout is closed for a period of time, the pneumatic clamping device loosens the air nozzle to separate the air pipe from the air nozzle, and the airbag returns to its original state after being deflated. The staff of the surface working platform connects the pneumatic clamping device to the air pipe and takes them out of the water. The staff of the surface platform starts to continue drilling downwards. After the drilling reaches the predetermined depth, drilling is stopped and the drill rod is lifted.

[0023] S5, orifice pipe casting, the orifice pipe is lowered from the water surface into the hole section by section, reinforced and completed: Specifically, a certain number of small holes are regularly arranged on the first section of the orifice pipe, hemp is wound 500 cm backward from the top of the orifice pipe, the hemp is wound in a cone shape, and cellulose ether, polyacrylamide or sodium alginate needs to be added during the winding process of the hemp; In addition to threaded connection, each subsequent section of the orifice pipe needs to be connected by welding reinforcement, and spare parts should be reinforced according to the preset welding parts; The orifice pipe is lowered from the water surface into the hole section by section. The end can be guided by an underwater robot when entering the hole. Since the orifice pipe is stuck in the hole due to the hemp fibers, the orifice sealer is directly installed at the orifice pipe mouth for grouting. After the grout stops absorbing, the orifice sealer valve is closed and allowed to solidify for three days. According to the needs of drilling arrangement, adjacent orifice pipes are reinforced to restrict each other, and at the same time, the parts close to the shore are directly connected to the shore for reinforcement. After the reinforcement is completed, the orifice pipe is cast.

[0024] The present invention also provides an inflatable bag for casting a hole pipe under deep water conditions, comprising: The airbag 1 is detachably mounted on the outside of the drill rod 2, an air inflating nozzle 3 is fixedly mounted on the top of the airbag 1, and a plurality of arc-shaped grooves 4 are opened on the surface of the airbag 1, and the plurality of arc-shaped grooves 4 are evenly distributed around the circumference; An auxiliary mechanism is also provided inside the airbag 1, and the auxiliary mechanism includes a slip ring 5, which is slidably sleeved on the inner side wall of the center of the airbag 1, a pull rod 6 is rotatably installed at the bottom of the slip ring 5, and the bottom of the pull rod 6 is rotatably installed on the inner side wall of the outermost end of the airbag 1, a telescopic rod 7 is fixedly installed on the outside of the slip ring 5, and an arc-shaped top plate 8 is fixedly installed on the movable end of the telescopic rod 7, and the outer part of the arc-shaped top plate 8 is arranged in contact with the inner side wall of the airbag 1, and a semicircular ring 9 is fixedly installed on the outer side of the arc-shaped top plate 8, and an arc-shaped slide groove 10 is provided on the inner side wall of the airbag 1, and the semicircular ring 9 is slidably sleeved on the arc-shaped slide groove 10, and the pull rod 6, the telescopic rod 7, the arc-shaped top plate 8, the semicircular ring 9 and the arc-shaped slide groove 10 are all in three groups, and the three groups of pull rods 6, telescopic rods 7, arc-shaped top plates 8, semicircular rings 9 and arc-shaped slide grooves 10 are symmetrically distributed about the center of the slip ring 5; In the above technical solution, after the airbag 1 and the drill rod 2 are placed in the borehole, the airbag 1 begins to expand after the airbag 1 is inflated through the inflation nozzle 3. After the airbag 1 is fully expanded, since the arc groove 4 is provided on the surface of the airbag 1, the arc groove 4 can increase the physical contact area and friction between the airbag 1 and the external hole wall, thereby enhancing the stability and adhesion ability under the action of water pressure and other external forces, and the arc groove 4 with uniform distribution design can disperse the stress concentration points of the airbag 1 under high pressure environment, prevent local excessive expansion or rupture, and enhance the safety and life of the overall structure. At the same time, the arc groove 4 enables the airbag 1 to better fit the hole wall and maintain good sealing when encountering an uneven hole wall environment or a hole wall environment with impurities on the surface. By setting the arc groove 4 on the surface of the airbag 1, not only the functionality of the airbag 1 in underwater drilling grouting applications is improved, but also the reliability and safety of the airbag 1 during use are further enhanced; During the expansion of the airbag 1, the outermost end of the airbag 1 will gradually move outward laterally due to the expansion. At this time, the inner wall of the airbag 1 at this position will pull the bottom of the pull rod 6 to move along, and the top of the pull rod 6 will pull the slip ring 5 to slide downward, and the slip ring 5 will drive the telescopic rod 7 to move along, and the telescopic rod 7 will drive the arc-shaped top plate 8 to move along. Since a semicircular ring 9 is provided on the arc-shaped top plate 8, and the semicircular ring 9 slides in the arc-shaped slide groove 10, the movement of the arc-shaped top plate 8 will always fit the inner wall of the airbag 1, and the setting of the telescopic rod 7 is to compensate the slip ring 5 when it moves downward. 5 and the arc-shaped top plate 8, and finally, during the downward movement of the slip ring 5, the arc-shaped top plate 8 is pulled downward by the telescopic rod 7, and the arc-shaped top plate 8 is always attached to the inner wall of the airbag 1; due to the arrangement of the arc-shaped groove 4, due to pressure or accumulation of impurities underwater, a bulge is easily generated at the corresponding position of the inner wall of the airbag 1 at the arc-shaped groove 4, so that the inner wall of the airbag 1 is smoother through the auxiliary scraping of the arc-shaped top plate 8, and the sliding of the arc-shaped top plate 8 can provide an auxiliary expansion effect, so that the overall expansion of the airbag 1 is more stable and uniform.

[0025] In summary, by using the airbag 1 in the drilling and grouting process and providing the arc-shaped groove 4 on the airbag 1, the physical contact area and friction between the airbag 1 and the external hole wall are increased, which not only improves the functionality of the airbag 1 in underwater drilling and grouting applications, but also further enhances the reliability and safety of the airbag 1 during use. At the same time, the auxiliary mechanism can make the expansion of the airbag 1 smoother, more stable and uniform.

[0026] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for casting an orifice pipe under deep water conditions, characterized in that: The following steps are involved: S1, construction preparation, including the positioning of drilling rigs and construction equipment, the entry of construction personnel and the assembly of construction equipment; S2, determine the hole position, the diver goes into the water to observe the siltation layer in the underwater part of the drilling area and determine the hole position; S3, start drilling, lower the drill rod (2) with the drill bit to the hole position section by section from the surface platform to drill the hole; S4, inflate the airbag, drill the hole and grout, pull up all the drill rods (2), check the core sample to determine the geological conditions of the stratum, replace the drill bit, measure 1.9m back from the drill bit and install the airbag (1) on the drill rod (2). The airbag (1) is about 50-60cm long and has its own inflation nozzle (3). The inflation nozzle (3) is connected to the inflation pipeline by a pneumatic clamping device. The pneumatic clamping device is pulled by a wire rope. The airbag (1) and the drill rod (2) are lowered from the water surface to the drilled hole. Underwater, an underwater robot can be used to guide the drill rod (2) into the hole accurately. The drill bit is at a distance from the hole. The bottom of the drill pipe (2) needs to be 50 cm deep. The airbag (1) is inflated to make the drill rod (2) stuck in the hole. Through the arc-shaped groove (4) arranged on the surface, the drill rod (2) is expanded in the borehole more stably and firmly. Then, grout is poured from the drill rod (2). When the hole is no longer filled with grout, the grouting is stopped. After the grout is closed for a period of time, the pneumatic clamping device releases the air nozzle to separate the air pipe from the air nozzle. The airbag (1) is restored to its original state after being deflated. The surface operation platform staff removes the pneumatic clamping device together with the air pipe from the water. The surface platform staff starts to continue drilling downwards. When the hole reaches the predetermined depth, the drilling is stopped and the drill rod (2) is lifted. S5, orifice pipe casting: the orifice pipe is lowered from the water surface into the hole section by section, reinforced and the orifice pipe casting is completed.

2. The method for casting a borehole pipe under deep water conditions according to claim 1, characterized in that: The step S1 specifically includes setting up a surface operation platform on the water surface of the dam reservoir area, using a surveying instrument to measure the hole position, which is the projection of the drilling hole position designed for underwater curtain grouting on the operation platform, and installing a drilling rig and a drilling tower at the hole position of the operation platform.

3. The method for casting a borehole pipe under deep water conditions according to claim 1, characterized in that: The S2 step specifically includes divers going into the water to investigate the silt layer in the underwater part of the drilling area. If the thickness of the silt is thin and not more than 50 cm, a high-pressure water gun is used to wash the silt covering the upper part. The divers dive and carry a measuring device with them to measure the corresponding position of the underwater opening. Then, the accurate position of the drilling hole is determined by the relative position of the underwater structure, and the positioning steel bars are installed at this position by an underwater hammer drill.

4. The method for casting a borehole pipe under deep water conditions according to claim 1, characterized in that: The step S3 specifically includes lowering a drill rod (2) with a drill bit section by section from the surface platform to the hole position, with the front end of the drill rod (2) being provided with a coring drill rod (2) and the rear end being provided with a conventional drill rod (2). After the drill rod (2) is lowered to a position close to the bottom of the water, an underwater robot is used to grab the drill rod (2), and after the underwater robot pulls the drill rod (2) to the positioning steel bar, the drill rod (2) is lowered and sleeved onto the positioning steel bar.

5. The method for casting a borehole pipe under deep water conditions according to claim 1, characterized in that: The step S5 specifically includes regularly arranging a certain number of small holes on the first section of the orifice tube, winding hemp silk 500 cm backward from the top of the orifice tube, the hemp silk winding is cone-shaped as a whole, and cellulose ether, polyacrylamide or sodium alginate needs to be added during the hemp silk winding process.

6. A method for inserting and casting a borehole pipe under deep water conditions according to claim 5, characterized in that: The S5 step specifically includes that the connection method of each subsequent section of the orifice pipe needs to be reinforced by welding in addition to the threaded connection, and the spare parts are reinforced according to the preset welding parts.

7. A method for casting a borehole pipe under deep water conditions according to claim 6, characterized in that: The S5 step also includes lowering the orifice pipe section by section from the water surface into the hole, and using an underwater robot to guide the end of the orifice pipe into the hole. Since the orifice pipe is stuck in the hole due to the hemp fibers, a orifice sealer is directly installed at the orifice pipe mouth for grouting. After the grout stops being absorbed, the orifice sealer valve is closed and left to solidify for three days.

8. The method for inserting and casting a borehole pipe under deep water conditions according to claim 7, characterized in that: The step S5 also includes: According to the needs of drilling arrangement, adjacent orifice pipes are reinforced to restrict each other, and at the same time, the parts close to the shore are directly connected to the shore for reinforcement. After the reinforcement is completed, the orifice pipe is cast.

9. An inflatable bag for casting a hole pipe under deep water conditions, characterized in that: A method for casting a borehole pipe under deep water conditions as described in claims 1 to 8, comprising: An airbag (1) is detachably mounted on the outside of a drill rod (2); an inflation nozzle (3) is fixedly mounted on the top of the airbag (1); a plurality of arc-shaped grooves (4) are formed on the surface of the airbag (1); and the plurality of arc-shaped grooves (4) are evenly distributed around the circumference.

10. The inflatable bag for casting a hole pipe under deep water conditions according to claim 9, characterized in that: The airbag (1) is also provided with an auxiliary mechanism, which comprises a slip ring (5), the slip ring (5) being slidably sleeved on the inner side wall at the center of the airbag (1), a pull rod (6) being rotatably mounted on the bottom of the slip ring (5), the bottom of the pull rod (6) being rotatably mounted on the inner side wall at the outermost end of the airbag (1), a telescopic rod (7) being fixedly mounted on the outside of the slip ring (5), a curved top plate (8) being fixedly mounted on the movable end of the telescopic rod (7), the outer side of the curved top plate (8) being in contact with the inner side wall of the airbag (1) The side wall is arranged, a semicircular ring (9) is fixedly installed on the outside of the arc-shaped top plate (8), an arc-shaped slide groove (10) is opened on the inner wall of the airbag (1), and the semicircular ring (9) is slidably sleeved on the arc-shaped slide groove (10), and the pull rod (6), telescopic rod (7), arc-shaped top plate (8), semicircular ring (9) and arc-shaped slide groove (10) are each in three groups, and the three groups of the pull rod (6), telescopic rod (7), arc-shaped top plate (8), semicircular ring (9) and arc-shaped slide groove (10) are symmetrically distributed about the center of the slip ring (5).

Images