Plugging grouting pipe for deep foundation pit

Abstract

The deep foundation pit plugging grouting pipe comprises at least two combined pipes, the combined pipes are hollow, the side faces of the combined pipes are provided with threads and a plurality of first grouting holes, and the first grouting holes communicate with the inner spaces of the combined pipes; a clamping pipe is arranged at the first end of each combined pipe, a clamping groove is formed in the second end of each combined pipe, and in every two adjacent combined pipes, the clamping pipe of one combined pipe can be inserted into the clamping groove of the other combined pipe to achieve connection; the drill bit is mounted at the bottom end of the bottommost combined pipe, and the drill bit is of a conical structure; and the grouting valve is mounted at the top end of the topmost combined pipe. A foundation pit blocked by silt can be drilled more easily through the drill bit and the threads on the side face of the combined pipe, and then grouting is conducted through the first grouting hole in the side face of the combined pipe; a plurality of combined pipes can be mutually spliced to prolong the length of the whole grouting pipe, so that the grouting requirements of different depths are met, and the disassembled combined pipes are easier to carry and transport.

Description

Technical Field

[0001] The present application relates to a deep foundation pit plugging grouting pipe in the technical field of construction engineering. Background Art

[0002] During construction, foundation pits are generally constructed by piling or drilling. For soft soil or buildings with high foundation requirements, there are generally higher requirements for the depth of the foundation pit, which requires deep foundation pit construction. During deep foundation pit construction, as the depth continues to increase, the probability of the foundation pit construction reaching the groundwater layer also continues to increase. When the foundation pit cuts off the groundwater layer, groundwater will seep into the foundation pit and flow back to the ground along the foundation pit, seriously affecting the construction process. Therefore, when a foundation pit leaks, it is necessary to promptly seal the foundation pit through grouting.

[0003] The current foundation pit sealing grouting process generally involves inserting a hollow tube with a first grouting hole on the side into the ground. After the hollow tube is inserted to a predetermined depth, quick-setting concrete slurry is injected into the top of the hollow tube. The slurry flows out from the first grouting hole on the side of the hollow tube and fills the foundation pit. After the concrete slurry solidifies, the foundation pit is sealed.

[0004] However, after a long period of water leakage, there may be sediment loss inside the foundation pit. The lost sediment fills the foundation pit, and the direct insertion of the hollow tube may be hindered. Moreover, the depth of the leaking hole is uncertain. The length of the existing hollow tube is generally fixed. When the depth of the leaking hole is deep, the hollow tube cannot penetrate into the hole position, and the leaking hole cannot be truly blocked. The groundwater is deposited at the bottom of the foundation pit, and the blocking firmness is low. In addition, since the length of the hollow tube is fixed, the tube is inconvenient to carry and transport. Utility Model Content

[0005] The purpose of the present application is to solve at least one of the technical problems existing in the prior art and to provide a deep foundation pit plugging grouting pipe, which is convenient for entering a leaking foundation pit for grouting and has a better plugging effect.

[0006] According to an embodiment of the present application, a deep foundation pit plugging grouting pipe is provided, comprising:

[0007] At least two combined pipes, the combined pipes are hollow and have threads and a plurality of first grouting holes on the side, the first grouting holes are connected to the internal space of the combined pipes; a clamping pipe is provided at the first end of the combined pipe, and a clamping groove is provided at the second end of the combined pipe, and the clamping pipe of one of the two adjacent combined pipes can be inserted into the clamping groove of the other combined pipe to achieve connection;

[0008] A drill bit, which is installed at the bottom end of the combined tube at the bottom, and has a conical structure;

[0009] A grouting valve is installed at the top of the combined pipe at the top, and is used to control the amount of slurry injected.

[0010] According to an embodiment of the present application, further, the threads of two adjacent combined pipes are connected head to tail.

[0011] According to an embodiment of the present application, further, the first grouting holes are arranged equidistantly along the shape direction of the combined pipe.

[0012] According to an embodiment of the present application, further, a clamping tube is provided on the top of the drill bit, and the clamping tube of the drill bit can be connected to the clamping groove of the combination tube.

[0013] According to an embodiment of the present application, further, the drill bit is hollow and a second grouting hole is provided on the top thereof, and the internal space of the drill bit is connected to the second grouting hole and the internal space of the combined pipe.

[0014] According to an embodiment of the present application, further, the second grouting holes are arranged in a circular array on the top of the drill bit.

[0015] According to an embodiment of the present application, further, the grouting valve is provided with a clamping groove, and the clamping groove of the grouting valve can be connected to the clamping tube of the combined pipe.

[0016] According to an embodiment of the present application, further, a hose is provided on the top of the grouting valve, and the hose is used to be connected to an external slurry supply device.

[0017] According to an embodiment of the present application, further, the side surfaces of the card tube and the card slot are both provided with pin holes, and the fixing pins can pass through the pin holes of the card tube and the card slot to achieve the fixation of the two.

[0018] According to an embodiment of the present application, further, the side surfaces of the clamping tube and the clamping groove are both provided with threaded holes, and the fixing bolts can be threadedly connected with the threaded holes of the clamping tube and the clamping groove to achieve the fixation of the two.

[0019] The beneficial effects of the embodiments of the present application include at least: the present application makes it easier to drill into a foundation pit clogged with mud and sand through the drill bit and the threads on the side of the combined pipe, and then perform grouting through the first grouting hole on the side of the combined pipe; multiple combined pipes can be spliced ​​with each other to extend the length of the overall grouting pipe, thereby meeting grouting requirements at different depths, and the disassembled combined pipes are also easier to carry and transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief description of the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present application, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0021] Figure 1 It is a three-dimensional diagram of a deep foundation pit plugging grouting pipe according to an embodiment of the present application;

[0022] Figure 2 This is a first three-dimensional diagram of the combined pipe 100 in the deep foundation pit plugging grouting pipe according to an embodiment of the present application;

[0023] Figure 3 This is a second three-dimensional diagram of the combined pipe 100 in the deep foundation pit plugging grouting pipe according to the embodiment of the present application;

[0024] Figure 4 It is a three-dimensional diagram of a drill bit 300 in a deep foundation pit plugging grouting pipe according to an embodiment of the present application;

[0025] Figure 5 It is a three-dimensional diagram of the grouting valve 400 in the deep foundation pit plugging grouting pipe according to an embodiment of the present application.

[0026] Figure numerals: 100 - combination pipe, 110 - thread, 120 - first grouting hole, 210 - clamping pipe, 220 - clamping groove, 230 - pin hole, 240 - threaded hole, 300 - drill bit, 310 - second grouting hole, 400 - grouting valve, 410 - hose. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0031] During construction, foundation pits are generally constructed by piling or drilling. For soft soil or buildings with high foundation requirements, there are generally higher requirements for the depth of the foundation pit, which requires deep foundation pit construction. During deep foundation pit construction, as the depth continues to increase, the probability of the foundation pit construction reaching the groundwater layer also continues to increase. When the foundation pit cuts off the groundwater layer, groundwater will seep into the foundation pit and flow back to the ground along the foundation pit, seriously affecting the construction process. Therefore, when a foundation pit leaks, it is necessary to promptly seal the foundation pit through grouting.

[0032] The current foundation pit sealing grouting process generally involves inserting a hollow tube with a first grouting hole on the side into the ground. After the hollow tube is inserted to a predetermined depth, quick-setting concrete slurry is injected into the top of the hollow tube. The slurry flows out from the first grouting hole on the side of the hollow tube and fills the foundation pit. After the concrete slurry solidifies, the foundation pit is sealed.

[0033] However, after a long period of water leakage, there may be sediment loss inside the foundation pit. The lost sediment fills the foundation pit, and the direct insertion of the hollow tube may be hindered. Moreover, the depth of the leaking hole is uncertain. The length of the existing hollow tube is generally fixed. When the depth of the leaking hole is deep, the hollow tube cannot penetrate into the hole position, and the leaking hole cannot be truly blocked. The groundwater is deposited at the bottom of the foundation pit, and the blocking firmness is low. In addition, since the length of the hollow tube is fixed, the tube is inconvenient to carry and transport.

[0034] In this regard, the present application proposes a deep foundation pit plugging grouting pipe, which is drilled into the foundation pit through the drill bit 300 and the thread 110 on the side of the combined pipe 100, so that it is easier to drill into the foundation pit blocked by mud and sand, and then grouting is carried out through the first grouting hole 120 on the side of the combined pipe 100; multiple combined pipes 100 can be spliced ​​with each other to extend the length of the overall grouting pipe, thereby meeting grouting requirements of different depths, and the disassembled combined pipe 100 is also easier to carry and transport.

[0035] Reference Figure 1The deep foundation pit plugging grouting pipe in the embodiment of the present application includes at least two combined pipes 100, a drill bit 300 and a grouting valve 400, wherein each combined pipe 100 can be spliced ​​together to form the main structure of the deep foundation pit plugging grouting pipe. Specifically, the combined pipe 100 is hollow and has a thread 110 and a plurality of first grouting holes 120 on the side. The first grouting holes 120 are connected to the internal space of the combined pipe 100, and the first grouting holes 120 are arranged equidistantly along the body direction of the combined pipe 100, so that when the concrete slurry is transported into the combined pipe 100, the slurry can flow out from each first grouting hole 120 and finally be evenly filled into the foundation pit to complete the foundation pit grouting. Refer to Figure 2 The first end of the combined tube 100 is provided with a clamping tube 210; Figure 3 , the second end of the combined pipe 100 is provided with a snap-in groove 220. Among the two adjacent combined pipes 100, the snap-in pipe 210 of one combined pipe 100 can be inserted into the snap-in groove 220 of the other combined pipe 100 to achieve connection, thereby increasing the length of the overall grouting pipe, being able to extend into a deeper foundation pit to complete the grouting work, and can also be disassembled for storage when stored, which is convenient for carrying and transportation. It is worth noting that the internal spaces of the connected combined pipes 100 are interconnected, so that the slurry can flow through the interior of each combined pipe 100 and be discharged through the first grouting hole 120 of each combined pipe 100. The threads of the two adjacent combined pipes 100 are connected head to tail, and when the combined pipe 100 rotates, the mud and sand can move along the thread direction.

[0036] Reference Figure 4 The drill bit 300 is installed at the bottom of the combined pipe 100 at the bottom. It has a conical structure and is used to push away the silt when exploring, thereby reducing the resistance of exploration. It is worth noting that the drill bit 300 is hollow and has a plurality of second grouting holes 310 on its top, and the plurality of second grouting holes 310 are distributed in a circular array. The internal space of the drill bit 300 is connected with the second grouting holes 310 and the internal space of the combined pipe 100, so that the slurry in the combined pipe 100 can flow out from the second grouting holes 310 after flowing into the drill bit 300, thereby improving the grouting efficiency.

[0037] Furthermore, a clamping tube 210 is provided on the top of the drill bit 300, and the clamping tube 210 of the drill bit 300 can be connected to the clamping groove 220 of the combined pipe 100, thereby realizing a detachable connection without affecting the circulation of the slurry.

[0038] Reference Figure 5The grouting valve 400 is installed at the top of the topmost combined pipe 100, which is used to connect with the external slurry supply equipment and control the amount of slurry injected to prevent the slurry from overflowing from the foundation pit due to excessive slurry, or to prevent the slurry from being too little to achieve effective plugging. Specifically, a hose 410 is provided at the top of the grouting valve 400, through which it is connected with the external slurry supply equipment. The hose 410 is a flexible member, so it can be bent for better connection.

[0039] Furthermore, the grouting valve 400 is provided with a clamping groove 220, and the clamping groove 220 of the grouting valve 400 can be connected to the clamping tube 210 of the combined pipe 100, thereby achieving a detachable connection without affecting the circulation of the slurry.

[0040] Specifically, in some embodiments, pin holes 230 are provided on the sides of the clamping tube 210 and the clamping groove 220, and the fixing pins can pass through the pin holes 230 of the clamping tube 210 and the clamping groove 220 to fix the two, thereby preventing the clamping tube 210 and the clamping groove 220 from loosening when the deep foundation pit plugging grouting pipe rotates.

[0041] In other embodiments, threaded holes 240 are provided on the sides of the clamping tube 210 and the clamping groove 220, and the fixing bolts can be threadedly connected to the threaded holes 240 of the clamping tube 210 and the clamping groove 220 to achieve fixation of the two, preventing the clamping tube 210 and the clamping groove 220 from loosening when the deep foundation pit plugging grouting pipe is rotated, and the threaded connection is more stable than the pin hole connection, preventing the pin from accidentally falling out of the pin hole.

[0042] In actual work, first assemble the combined pipe 100, the drill bit 300 and the grouting valve 400 according to the depth of the foundation pit and the depth of the leaking point, and then use a crane to lift the entire grouting pipe, with the drill bit 300 at the bottom and the grouting valve 400 at the top, and extend it into the foundation pit. Then fix the grouting valve 400 to the drilling rig, and connect the hose 410 to the slurry supply equipment. During the drilling process of the drilling rig, the slurry supply equipment continues to grout, and the slurry is filled into the foundation pit for plugging. When the slurry is ready to solidify, the deep foundation pit plugging grouting pipe is reversely rotated out, and the deep foundation pit plugging grouting pipe is cleaned and disassembled, waiting for the subsequent grouting and plugging work.

[0043] The above is a specific description of the preferred implementation methods of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A deep foundation pit plugging grouting pipe, characterized in that: include: At least two combined pipes (100), the combined pipes (100) being hollow and having a side surface provided with a thread (110) and a plurality of first grouting holes (120), the first grouting holes (120) being communicated with the internal space of the combined pipe (100); a clamping pipe (210) being provided at a first end of the combined pipe (100), a clamping groove (220) being provided at a second end of the combined pipe (100), and the clamping pipe (210) of one of the two adjacent combined pipes (100) being capable of being inserted into the clamping groove (220) of the other combined pipe (100) to achieve connection; A drill bit (300), the drill bit (300) being installed at the bottom end of the combined tube (100) at the bottom, the drill bit (300) being in a conical structure; A grouting valve (400) is installed at the top of the topmost combined pipe (100), and the grouting valve (400) is used to control the amount of slurry injected.

2. The deep foundation pit plugging grouting pipe according to claim 1 is characterized in that: The threads of two adjacent combined pipes (100) are connected head to tail.

3. The deep foundation pit plugging grouting pipe according to claim 1 is characterized in that: The first grouting holes (120) are arranged at equal distances along the body direction of the combined pipe (100).

4. The deep foundation pit plugging grouting pipe according to claim 1 is characterized in that: A clamping tube (210) is provided on the top of the drill bit (300), and the clamping tube (210) of the drill bit (300) can be connected to the clamping groove (220) of the combined tube (100).

5. The deep foundation pit plugging grouting pipe according to claim 1 is characterized in that: The drill bit (300) is hollow and has a second grouting hole (310) on its top; the internal space of the drill bit (300) is in communication with the second grouting hole (310) and the internal space of the combined pipe (100).

6. The deep foundation pit plugging grouting pipe according to claim 5, characterized in that: The second grouting holes (310) are arranged in a circular array on the top of the drill bit (300).

7. The deep foundation pit plugging grouting pipe according to claim 1, characterized in that: The grouting valve (400) is provided with a clamping groove (220), and the clamping groove (220) of the grouting valve (400) can be connected to the clamping tube (210) of the combined pipe (100).

8. The deep foundation pit plugging grouting pipe according to claim 1, characterized in that: A hose (410) is provided on the top of the grouting valve (400), and the hose is used to be connected to an external slurry supply device.

9. The deep foundation pit plugging grouting pipe according to any one of claims 1 to 8, characterized in that: The sides of the clamping tube (210) and the clamping groove (220) are both provided with pin holes (230), and a fixing pin can pass through the pin holes (230) of the clamping tube (210) and the clamping groove (220) to achieve the fixing of the two.

10. The deep foundation pit plugging grouting pipe according to any one of claims 1 to 8, characterized in that: The side surfaces of the clamping tube (210) and the clamping groove (220) are both provided with threaded holes (240), and bolts for fixing can be threadedly connected with the threaded holes (240) of the clamping tube (210) and the clamping groove (220) to achieve the fixing of the two.

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