Sinking assisting device for rotational flow well

Abstract

The utility model relates to a rotational flow well sinking assisting device which is applied to a prefabricated rotational flow well shaft wall and comprises a plurality of sinking assisting pipes installed on the outer side of the shaft wall, a blade foot is arranged at the lower end of the first section of the shaft wall, a blade foot steel plate is fixed at the lower end of the blade foot, a plurality of radial through grooves of the shaft wall are formed in the bottom face of the blade foot steel plate, and the sinking assisting pipes are L-shaped. The horizontal part of the lower end of the L-shaped sinking-assisting pipe is embedded into the through groove, the vertical part of the L-shaped sinking-assisting pipe extends upwards along the cylinder wall, the upper end of the vertical part is connected with a grouting pump, and the vertical part of the L-shaped sinking-assisting pipe is fixed to the cylinder wall in a spot welding mode; and a plurality of jet holes are formed in the vertical part of the L-shaped sinking assisting pipe. By means of the structure, the barrel wall drives the L-shaped sinking assisting pipe to sink along with the barrel wall, and the requirement for the welding technology of constructors is greatly lowered; the sinking assisting pipe can be prevented from entering a large amount of soil during sinking; and when sinking is difficult, lubricating liquid is injected into the periphery and the bottom of the cylinder wall through the spraying holes of the L-shaped sinking assisting pipe, so that the soil body is loosened, the resistance of the soil body below the cylinder body to the cylinder wall and the friction force of the soil body outside the cylinder wall to the side wall of the cylinder wall are reduced, and the well sinking work can be smoothly carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of caisson construction, in particular to a swirl well sinking aid device. Background Art

[0002] In the field of metallurgical construction, cyclone wells are important structures. Common construction methods include large excavation, reverse construction, caisson method, etc. Caisson method is widely used because of its advantages of large burial depth, strong integrity, and good stability. Affected by geological conditions, during the caisson construction process, when the friction between the cylinder wall and the soil is greater than the deadweight of the cylinder wall, the cylinder wall is difficult to sink. In order to solve this problem, the auxiliary device of the prior art welds multiple vertical water injection pipes on the outside of the cylinder wall to loosen the soil around the cylinder wall, thereby reducing the resistance of the soil to the cylinder wall.

[0003] However, the water injection pipe of this auxiliary device also has the following defects:

[0004] 1) The welding ability of the construction workers is relatively high. If the welding between the water injection pipe and the cylinder wall is not firm, the water injection pipe will easily be separated from the cylinder wall due to the resistance of the soil during the sinking process, which greatly reduces the sinking effect;

[0005] 2) During the sinking process, a large amount of soil can easily enter the water injection pipe, and the soil below the water injection pipe cannot be completely soaked, affecting the sinking effect. Utility Model Content

[0006] The utility model aims to solve the problems of high welding requirements, loose welding and easy blockage of water injection pipes by soil in auxiliary devices in the prior art, thereby providing a vortex well sinking aid device.

[0007] The utility model solves the above problems and adopts the following technical solutions:

[0008] A vortex well sinking aid device is applied to a prefabricated vortex well barrel wall. The sinking aid device includes a plurality of sinking aid tubes installed on the outer side of the barrel wall. A blade foot is provided at the lower end of the first section of the barrel wall. A blade foot steel plate is fixed at the lower end of the blade foot. A plurality of radial through grooves of the barrel wall are opened on the bottom surface of the blade foot steel plate. The sinking aid tube is arranged in an L shape. The horizontal portion of the lower end of the L-shaped sinking aid tube is embedded in the through groove. The vertical portion of the L-shaped sinking aid tube extends upward along the barrel wall. The upper end of the vertical portion is connected to a grouting pump. The vertical portion of the L-shaped sinking aid tube is fixed to the barrel wall by spot welding. A plurality of injection holes are provided on the vertical portion of the L-shaped sinking aid tube.

[0009] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

[0010] 1) With the above structure, when the cylinder wall is vertically sunk into the well, the L-shaped sinking-aiding pipe is driven to sink accordingly. Compared with the welding method of the sinking-aiding pipe and the cylinder wall in the prior art, the fixing method is changed, which greatly reduces the requirements for the welding technology of the construction personnel; it can also prevent the sinking-aiding pipe from entering a large amount of soil when sinking;

[0011] 2) The L-shaped sinking-aiding pipe is fixed in the through groove of the blade foot steel plate. When sinking, the blade foot steel plate still bears a lot of resistance, and the L-shaped sinking-aiding pipe is subject to less resistance, thus avoiding deformation of the sinking-aiding pipe under stress;

[0012] As a preferred embodiment, a further technical solution of the utility model is:

[0013] A plurality of injection holes are also provided on the horizontal portion of the L-shaped sinking aid tube; when sinking becomes difficult, lubricating liquid is sprayed around and below the tube wall through the injection holes in the vertical and horizontal portions to loosen the soil, thereby reducing the resistance and friction of the soil on the tube wall and facilitating smooth caisson work.

[0014] The length of the horizontal portion of the L-shaped sinking-aiding pipe is smaller than the width of the blade foot steel plate; through the above-mentioned structural setting, the sinking resistance will not be increased due to the addition of the L-shaped sinking-aiding pipe when sinking the well.

[0015] The vertical portion of the L-shaped sinking-aiding pipe is formed by splicing a plurality of longitudinal steel pipes, and the length of each longitudinal steel pipe is greater than the height of the cylinder wall. Through the above structure, when sinking each section of the cylinder wall of the well, the vertical portion of the L-shaped sinking-aiding pipe can be lengthened according to the number of cylinder wall sections, which is convenient for connecting a grouting pump on the ground and is more reasonable to use.

[0016] The inner opening of the horizontal portion of the L-shaped sinking-aiding tube is an oblique opening that forms an acute angle with the ground; the oblique opening can further prevent soil from entering the L-shaped sinking-aiding tube and affecting the sinking-aiding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 A partial enlarged view of middle A;

[0019] Figure 3 This is a schematic diagram of the structure of the L-shaped sinking aid pipe of the utility model;

[0020] Figure 4 It is a top view schematic diagram of an embodiment of the utility model;

[0021] In the figure: 1. cylinder wall; 2. L-shaped sinking aid tube; 21. vertical steel pipe; 22. injection hole; 23. horizontal steel pipe; 24. oblique mouth; 3. soil; 4. bottom plate; 5. bottom plate cushion; 6. grouting pump; 7. blade foot; 71. blade foot steel plate; 72. through groove. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0023] See attached Figure 1-4 The utility model discloses a vortex well sinking aid device, which is applied to a prefabricated vortex well cylinder wall 1. The sinking aid device includes a plurality of sinking aid tubes installed on the outer side of the cylinder wall 1. A blade foot is arranged at the lower end of the first section of the cylinder wall 1, and a blade foot steel plate 71 is fixed at the lower end of the blade foot. A plurality of radial through grooves 72 of the cylinder wall 1 are opened on the bottom surface of the blade foot steel plate 71. The sinking aid tube is arranged in an L shape. The horizontal portion of the lower end of the L-shaped sinking aid tube 2 is embedded in the through groove 72. The vertical portion of the L-shaped sinking aid tube 2 extends upward along the cylinder wall. The upper end of the vertical portion is connected to a grouting pump 6. The vertical portion of the L-shaped sinking aid tube 2 is spot-welded and fixed to the cylinder wall 1. A plurality of injection holes 22 are arranged on the vertical portion of the L-shaped sinking aid tube 2.

[0024] In this embodiment, the horizontal portion of the L-shaped sinking-aiding tube 2 is made of a transverse steel tube 23, and the vertical portion is made of a plurality of vertical steel tubes 21 spliced ​​together. The transverse steel tube 23 is connected to the vertical steel tube 21 at the lowest end. The transverse steel tube 23 and the vertical steel tube 21 can be made of leftover materials at the construction site to reduce construction costs. As an option, the L-shaped sinking-aiding tube 2 is pre-made into an integrated L-shaped sinking-aiding tube using an alloy steel material with higher hardness. The diameter of the alloy steel tube is 0.25m, ensuring that the transverse steel tube 23 and the vertical steel tube 21 will not disintegrate or deform during sinking. The length of the transverse steel tube 23 is less than the width of the blade foot steel plate 71, and the width of the blade foot steel plate 71 is the ring diameter from the inner circle to the outer circle of the bottom surface 71 of the blade foot steel plate. Through the above structure, the L-shaped sinking-aiding tube 2 is embedded in the through groove 72 of the blade foot steel plate 71. During sinking, the blade foot steel plate 71 still bears a lot of resistance, and the transverse steel tube 23 is subjected to less resistance, thereby avoiding deformation of the transverse steel tube 23 under stress.

[0025] In this embodiment, the length of each vertical steel pipe 21 is greater than the height of the cylinder wall 1, so that when each section of the cylinder wall 1 sinks, the corresponding vertical steel pipes 21 can be spliced ​​according to the number of sections of the cylinder wall 1, making the use of the vertical steel pipes 21 more reasonable; the top elevation of the L-shaped sinking-aiding pipe 2 is 1.5m-1m higher than the first section of the caisson cylinder wall, which is convenient for construction personnel to stand on the cylinder wall 1 to operate; the vertical steel pipe 21 of the L-shaped sinking-aiding pipe 2 is close to the cylinder wall 1, and is spot-welded and fixed to the embedded parts set on the outer surface of the cylinder wall 1, or is welded and fixed to the cylinder wall 1 with pre-embedded tension screws.

[0026] In this embodiment, the inner opening of the transverse steel pipe 23 is an oblique opening 24 which is at an acute angle to the ground. Specifically, the oblique opening 24 is at an angle of 30 degrees to the ground, which further reduces the soil 3 from entering the L-shaped sinking aid pipe 2 and affecting the sinking aid effect.

[0027] As an option, the injection holes 22 are arranged at equal intervals on the L-shaped sinking-aiding tube 2. Specifically, the injection holes 22 are arranged in the cross direction of the L-shaped sinking-aiding tube 2, which can soak the surrounding soil 3 of the L-shaped sinking-aiding tube 2 to achieve a better sinking-aiding effect.

[0028] As an option, the lubricating liquid in this embodiment can be lubricating liquid, water or other liquid that can soak the soil.

[0029] In this embodiment, through the above-mentioned structure, when the cylinder wall 1 is vertically sunk into the well, the L-shaped sinking-aiding pipe 2 is driven to sink accordingly. Compared with the method of welding the sinking-aiding pipe to the cylinder wall 1 and driving the sinking in the prior art, the requirements for the welding technology of the construction personnel are greatly reduced; it can also prevent the sinking-aiding pipe from entering a large amount of soil when sinking; when sinking is difficult, lubricating liquid is injected into the surroundings and bottom of the cylinder wall 1 through the L-shaped sinking-aiding pipe 2 to loosen the soil 3, thereby reducing the resistance of the soil 3 below the cylinder to the cylinder wall 1 and the friction of the soil 3 outside the cylinder wall 1 on the side wall of the cylinder wall 1, which facilitates the smooth progress of the caisson work; after the caisson is in place, cement slurry, etc. can be injected through the L-shaped sinking-aiding pipe 2, which can play a role in reinforcing the soil around the cylinder wall and waterproofing and anti-seepage.

[0030] This embodiment provides a sinking procedure using the device to assist sinking:

[0031] Step 1: excavate the earthwork to a certain depth in advance, pour the cushion layer, and build the vortex well blade foot membrane;

[0032] Step 2: prefabricate the first section of the cylinder wall, cast the first section of the cylinder wall according to the segmented height of the cylinder wall 1, after the cylinder wall 1 is demoulded, a plurality of radial through grooves 72 of the cylinder wall 1 are chiseled out on the bottom surface of the blade foot steel plate 71 before sinking, insert the transverse steel pipes 23 of a plurality of L-shaped sinking-aiding pipes 2 into the chiseled through grooves 72, and weld and fix them with the blade foot steel plate 71, and connect the upper end of the vertical steel pipe 21 of the L-shaped sinking-aiding pipe 2 to the grouting pump; the spacing of the L-shaped sinking-aiding pipes 2 is set according to the geological conditions and the diameter of the vortex well, and is controlled between 5m-10m as appropriate;

[0033] Step 3: When the first section of the cylinder wall reaches a certain strength, the first section of the cylinder wall starts to sink. Before sinking, all the blade foot molds at the bottom are chiseled off. When sinking becomes difficult, the lubricant is injected by the grouting pump 6 above. The lubricant is ejected through the injection hole 22 to separate the cylinder wall 1 and the soil 3 close to the cylinder wall 1 by penetration, thereby reducing the friction between the cylinder wall 1 and the soil 3. When the deadweight of the vortex well cylinder wall 1 is greater than the friction between the cylinder walls 1, the cylinder wall 1 continues to sink.

[0034] Step 4: When the casting surface of the first section of the cylinder wall sinks to a height of 1m from the ground, start prefabrication of the second section of the cylinder wall;

[0035] Step 5: Install the second section of the cylinder wall above the first section of the cylinder wall, remove the grouting pump from the vertical steel pipe of the first section of the L-shaped sinking aid pipe, splice the second section of the vertical steel pipe, install the grouting pump on the upper end of the second section of the vertical steel pipe, and start sinking the second section of the cylinder wall. When sinking becomes difficult, inject lubricating liquid into the L-shaped sinking aid pipe again;

[0036] Step 6: Repeat steps 4 and 5 to prefabricate the third section of the cylinder wall, connect the third section of the vertical steel pipe to the second section of the vertical steel pipe, and sink the third section of the cylinder wall and assist the sinking;

[0037] Step 7: All the cylinder walls 1 are sunk into place, backfilled and sealed, and then the bottom plate cushion layer 5 is poured and the bottom plate 4 is constructed. After the vortex well is constructed, cement slurry is injected through the L-shaped sinking aid pipe 2 to reinforce the soil.

[0038] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A vortex well sinking aid device, applied to a prefabricated vortex well cylinder wall (1), the sinking aid device comprising a plurality of sinking aid tubes installed outside the cylinder wall (1), a blade foot is arranged at the lower end of the first cylinder wall (1), a blade foot steel plate (71) is fixed at the lower end of the blade foot, Features: The bottom surface of the blade foot steel plate (71) is provided with a plurality of radial through grooves (72) of the cylinder wall (1); the sinking aid pipe is arranged in an L shape; the horizontal portion of the lower end of the L-shaped sinking aid pipe (2) is embedded in the through groove (72); the vertical portion of the L-shaped sinking aid pipe (2) extends upward along the cylinder wall; the upper end of the vertical portion is connected to a grouting pump (6); the vertical portion of the L-shaped sinking aid pipe (2) is fixed to the cylinder wall (1) by spot welding; and a plurality of injection holes (22) are arranged on the vertical portion of the L-shaped sinking aid pipe (2).

2. The vortex well sinking aid device according to claim 1, Features: A plurality of injection holes are also provided on the horizontal portion of the L-shaped sinking aid pipe (2).

3. The vortex well sinking aid device according to claim 1, Features: The length of the horizontal portion of the L-shaped sinking aid pipe (2) is smaller than the width of the blade foot steel plate (71).

4. The vortex well sinking aid device according to claim 1, Features: The vertical portion of the L-shaped sinking aid tube (2) is formed by splicing a plurality of vertical steel tubes (21), and the length of each vertical steel tube (21) is greater than the height of the tube wall (1).

5. The vortex well sinking aid device according to claim 1, Features: The inner opening of the horizontal portion of the L-shaped sinking aid pipe (2) is an oblique opening (24) that forms an acute angle with the ground.

Images