Grouting pipe for post-grouting of grouting pile

Abstract

The utility model relates to the technical field of building construction, and particularly discloses a grouting pipe for post-grouting of a grouting pile. Comprising a pipe body, the pipe body comprises a screw thread, a straight pipe and a floral pipe, and further comprises a rubber bowl which can completely cover and seal the floral pipe after being connected with the straight pipe in a sleeved mode, and the rubber bowl is provided with a pressed gap which can be opened only after being pressed. The technical problems that in the prior art, a sounding pipe and a grouting pipe need to be pre-buried in a reinforcement cage of a pre-buried forward cast-in-place pile in a post-grouting pile of a cast-in-place pile, the number of pre-buried pipelines is too large, the structure of the cast-in-place pile is affected, and cost is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement experiments, in particular to a grouting pipe for post-grouting of grouting piles. Background Art

[0002] In the construction industry, as society develops, the volume of building structures required by the market continues to increase. Consequently, the strength of the cast-in-place piles supporting the main structure must also increase, and the bearing capacity standards of cast-in-place piles are also constantly improving. Currently, most cast-in-place pile designs require the use of post-grouting technology to ensure the pouring quality of the pile body. Furthermore, after pouring, the concrete of the pile body must be tested using the acoustic transmission method to ensure that the quality meets the design standards.

[0003] Post-grouting of cast-in-place piles involves injecting cement slurry through pre-buried grouting pipes on the pile or pile sides after the pile is formed. This compaction of the slurry eliminates defects such as mud skin on the sides of the pile or sediment at the bottom of the pile, improving the quality of the soil surrounding the pile. This reinforces the soil within a certain area around the pile, increasing soil strength, and boosting pile side friction and the bearing capacity of the grouted pile, thereby increasing the bearing capacity of a single pile. Grouting after pile formation requires grouting pipes, which are typically used in existing technologies. Therefore, pre-buried grouting pipes are required at the bottom and sides of the reinforcement cage before the cast-in-place pile is placed. High-pressure grouting is then performed using a high-pressure pump within 2-30 days of pile formation.

[0004] Acoustic testing uses sound waves to determine the quality of a pile. The ultrasonic testing tube is the channel through which the probe enters the interior of the pile during ultrasonic testing of bored piles. It also needs to be embedded in the steel cage before the pile is cast. To ensure accurate testing, more than one ultrasonic testing tube can be embedded. Currently, when the pile diameter is between 0.6 and 1.0 meters, two ultrasonic testing tubes are required to be arranged in a straight line with the center point; when the pile diameter is between 1.0 and 2.5 meters, three ultrasonic testing tubes are required to be arranged, with the three tubes positioned in an equilateral triangle; when the pile diameter is greater than 2.5 meters, four ultrasonic testing tubes are required to be arranged, with the four tubes connected and arranged in a square.

[0005] Therefore, before pouring bored piles, it is necessary to pre-embed acoustic detection pipes and grouting pipes in the steel cage of the bored piles. This not only makes the bored piles have too many pipes, affecting their structure, but also makes the cost of pouring bored piles higher because of the pre-embedded multiple pipes. Utility Model Content

[0006] The purpose of the utility model is to provide a grouting pipe for post-grouting of grouting piles, so as to solve the technical problem mentioned above in the prior art that in the prior art, it is necessary to pre-embed acoustic detection pipes and grouting pipes in the steel cage of the pre-embedded front grouting piles, and there are too many pre-embedded pipes, which affects the structure of the grouting piles and increases the cost.

[0007] To solve the above problems, the technical solution adopted by the present utility model is as follows: a grouting pipe for post-grouting of grouting piles, including a pipe body, the pipe body includes a thread, a straight pipe and a perforated pipe, and further includes a rubber bowl that can completely cover and seal the perforated pipe after being sleeved with the straight pipe, and a pressure-receiving gap that can only be opened under pressure is provided on the rubber bowl.

[0008] The beneficial effects of this implementation scheme are as follows:

[0009] 1. In the prior art, it is necessary to pre-embed a sonic logging pipe and a grouting pipe in the grouting pile. Therefore, there are too many pipes pre-embedded in the grouting pile, which not only makes the pipes arranged in the cast-in-place pile too many and affects its structure, but also makes the casting cost of the cast-in-place pile higher due to the pre-embedding of multiple pipes; if the sonic logging pipe can be used as the grouting pipe, there is no need to pre-embed the grouting pipe, which can reduce the number of pre-embedded pipes and reduce the pre-embedding cost. However, in the later stage, the sonic logging probe needs to be inserted into the channel of the pile body, and the inside of the sonic logging pipe should be smooth to avoid friction and scratching of the probe by sand and gravel. Therefore, in order to ensure that no concrete or other sundries enter the sonic logging pipe during the construction process and cause protrusions or blockages. The sonic logging pipe needs to be sealed, but the grouting pipe is used for post-grouting, and the cement needs to be discharged from the pipe to the outside, so holes need to be opened, and the two are contradictory. Therefore, the sonic logging pipe cannot be directly used as the grouting pipe. In this application, a perforated pipe with holes is provided at the lower end of the grouting pipe, and the perforated pipe is sealed by a rubber bowl. During the pouring of the grouting pile, due to the design of the rubber bowl, the rubber bowl blocks the cement slurry outside, so that no concrete or other sundries enter during the construction process and cause protrusions or blockages. In the later stage, sonic logging is carried out first, and after the sonic logging is completed, grouting operation is carried out. During grouting, the cement slurry enters the rubber bowl through the orifice of the perforated pipe and the holes on the perforated pipe. There is a pressure-receiving gap on the rubber bowl that will only open under pressure. As long as a grouting pump is used to pressurize, the cement slurry can flush open the pressure-receiving gap on the rubber bowl and seep out the cement slurry to realize grouting. Therefore, this application can use the grouting pipe as a sonic logging pipe, so that the pre-embedding of the sonic logging pipe is reduced before pouring, and the pouring cost of the grouting pile is reduced.

[0010] 2. Since the pressure-receiving gap provided on the rubber bowl needs to be opened under a certain pressure, after the grouting pipe is installed, clean water can be injected into the grouting pipe. The static pressure of the water body cannot open the pressure-receiving gap of the rubber bowl, but the water body can enhance the internal pressure of the grouting pipe, so that when pouring the grouting pile, the internal and external pressures are balanced, and the concrete slurry will not enter the grouting pipe. Therefore, the design of the pressure-receiving gap of the rubber bowl enables the grouting pipe to be filled with water, and filling with water can prevent the sonic logging pipe from being blocked to a certain extent and ensure the smooth progress of the later acoustic wave detection work.

[0011] 3. Even if a small amount of concrete slurry enters the grouting pipe, the clear water in the grouting pipe will dilute the slurry, making it difficult for the slurry to adhere to and solidify on the inner wall of the pipe. No large concrete coagulation blocks or protrusions will be formed, and the formed ash-like small particles will settle to the bottom of the rubber bowl. Therefore, it is ensured that the probe will not be affected when it enters the pipe later.

[0012] Further, a horizontal pipe perpendicular to the straight pipe is provided on the straight pipe, a horizontal perforated pipe is provided on the horizontal pipe, and a rubber bowl is also sleeved on the horizontal perforated pipe.

[0013] Further, a hoop groove is provided on the rubber bowl, a connecting concave thread is provided on the straight pipe, and rubber wire is provided on the hoop groove. The rubber wire binds the hoop groove and the connecting concave thread into one body.

[0014] Further, a water stop valve is threadedly connected to the screw thread.

[0015] Further, the straight pipe and the perforated pipe are of an integral structure with the same outer diameter, and perforation holes are provided on the perforated pipe.

[0016] Further, the inner diameter of the rubber bowl is equal to the inner diameters of the straight pipe and the perforated pipe. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0018] Figure 2 is a schematic structural diagram of the superposition of straight pipes in an embodiment of the present utility model.

[0019] Figure 3 is a schematic structural diagram of the connection between a straight pipe and a rubber bowl in an embodiment of the present utility model. Detailed Description of the Embodiment

[0020] The following is a further detailed description through specific embodiments:

[0021] The reference numerals in the drawings of the specification include: straight pipe 1, connecting concave thread 11, perforated pipe 2, perforation holes 21, rubber bowl 3, hoop groove 31, compression gap 32, screw thread 4, horizontal pipe 5, and water stop valve 6.

[0022] The embodiment is as shown in the attached... Figures 1 to 3As shown: The grouting pipe for post - grouting of grouting piles includes a pipe body. The pipe body includes a screw thread 4, a straight pipe 1, and a perforated pipe 2. Its main body is the straight pipe 1. The straight pipe 1 and the perforated pipe 2 are an integral stainless - steel pipe. However, the perforated pipe 2 is different from the straight pipe 1. A number of equidistant perforated pipe holes 21 are opened on the side wall of the perforated pipe 2, while the side wall of the straight pipe 1 is smooth. A screw thread 4 is welded to the upper end of the straight pipe 1. A water - stop valve 6 is connected using the thread on the screw thread 4. The water - stop valve 6 is mainly used to control the flow rate and pressure of the grout during later grouting. The grouting pump is connected to the water - stop valve 6 using a rubber hose and enters the grouting pipe through the control of the water - stop valve 6. Since the water - stop valve 6 is connected to the straight pipe using the screw thread 4, during acoustic wave detection, the water - stop valve 6 can be removed, facilitating the insertion of the probe during acoustic wave detection.

[0023] A rubber bowl 3 is arranged on the outer periphery of the perforated pipe 2. The rubber bowl is divided into a cylindrical hoop groove 31 and a hemispherical bowl body. The hoop groove 31 and the hemispherical bowl body are an integrally formed rubber structure. A number of pressure - receiving voids 32 are opened on the bowl - body structure of the rubber bowl 3. The pressure - receiving voids 32 can withstand a pressure of 3 Mpa. When the rubber bowl 3 is subjected to a pressure greater than 3 Mpa from the inside to the outside, the rubber bowl 3 deforms, its diameter expands, causing the pressure - receiving voids 32 to open. Its open state is as Figure 3 shown, which can connect the inside and outside of the rubber bowl 3. When not opened, the rubber bowl 3 is as Figure 1 shown, separating the inside and outside of the rubber bowl 3.

[0024] The inner diameter of the rubber bowl 3 is equal to the outer diameter of the perforated pipe 2, and the outer diameter of the perforated pipe 2 is the same as the outer diameter of the straight pipe 1. Therefore, the rubber bowl 3 can be sleeved on the lower end of the pipe body. After sleeving, as Figure 3 shown, the rubber bowl 3 completely covers the perforated pipe 2 inside the bowl, and the upper edge of the rubber bowl 3 fits against the outer side wall of the straight pipe 1. There are connecting concave grooves 11 on the outer wall of the straight pipe 1. Therefore, the rubber bowl 3 can be tied with rubber wire on the hoop groove 31. The rubber wire can cause the rubber at the hoop groove 31 to deform and squeeze into the connecting concave grooves 11, resulting in better sealing.

[0025] A horizontal pipe 5 is also provided on the straight pipe 1. The horizontal pipe 5 is perpendicular to and connected to the straight pipe 1. The end of the horizontal pipe 5 is also provided with a horizontal perforated pipe, and its structure is the same as that of the straight pipe 1 and the perforated pipe 2. A rubber bowl 3 is also sleeved on the horizontal pipe 5 and the horizontal perforated pipe. The connection method of the rubber bowl 3 on the horizontal pipe 5 is the same as that on the straight pipe 1.

[0026] Since the acoustic detection pipe needs to be embedded in the grouting pile, when it is used as a grouting pipe, its side is surrounded by the concrete of the grouting pile and it is impossible to grout the side of the grouting pile. Therefore, the design of the horizontal pipe 5 enables this application to grout the side of the grouting column during later grouting.

[0027] In order to embed the grouting pipe of this application deeper, it can be as Figure 2Similarly, the straight pipes 1 are combined to ensure that there are the structures of the flower pipes 2 and the rubber bowls 3 at the lowermost ends respectively.

[0028] The above are only the embodiments of the present invention, and common knowledge such as the specific structures and characteristics known in the solutions is not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. The grouting pipe for post-grouting of grouting piles includes a pipe body, and is characterized in that: The pipe body includes a thread, a straight pipe, and a perforated pipe, and further includes a rubber bowl that can completely cover and seal the perforated pipe after being sleeved on the straight pipe. The rubber bowl is provided with a pressure gap that can only be opened under pressure.

2. The grouting pipe for post-grouting of grouting piles according to claim 1, wherein: A horizontal pipe perpendicular to the straight pipe is provided on the straight pipe. A horizontal perforated pipe is provided on the horizontal pipe, and a rubber bowl is also sleeved on the horizontal perforated pipe.

3. The grouting pipe for post-grouting of grouted piles according to claim 1, characterized in that: A hoop groove is provided on the rubber bowl, and a connecting concave thread is provided on the straight pipe. A rubber wire is provided on the hoop groove, and the rubber wire binds the hoop groove and the connecting concave thread into one body.

4. The grouting pipe for post-grouting of grouted piles according to claim 2, wherein: A water stop valve is threadedly connected to the thread.

5. The grouting pipe for post-grouting of grouting piles according to claim 1, characterized in that: The straight pipe and the perforated pipe are of an integral structure with the same outer diameter, and the perforated pipe is provided with perforated pipe holes.

6. The grouting pipe for post-grouting of grouting piles according to claim 5, characterized in that: The inner diameter of the rubber bowl is equal to the inner diameters of the straight pipe and the perforated pipe.

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