Construction system for washing hole wall and replacing turbid water in hole drilled by bored pile

Abstract

The application discloses a kind of perfusion pile core hole camera hole wall cleaning and hole turbid water replacement construction system, including brushing device and turbid water replacement device, the side of brushing device is equipped with a plurality of bristles, to brush the core hole wall by a plurality of bristles, brushing device is also equipped with water inlet channel and the water outlet of being connected in water inlet channel, water inlet channel is used to external water source, and water outlet is used to spray water towards core hole wall.Turbid water replacement device includes replacement pipe and drain pipe, replacement pipe has water injection end, and is equipped with clean water inlet and the water inlet of being connected clean water inlet, water inlet is located in water injection end, clean water inlet is used to external clean water source, drain pipe is connected with replacement pipe, and has water inlet end that stretches out relative to water injection end, turbid water replacement device is used to be installed in the upper position of core hole after brushing device brushes the core hole wall, and make water inlet end stretch into core hole bottom.The technical scheme of the present application can improve the cleaning effect in core hole.

Description

Technical Field

[0001] This invention relates to the field of pile foundation testing technology, and in particular to a construction system for cleaning the borehole wall of a core hole and replacing turbid water inside the hole in a cast-in-place pile. Background Technology

[0002] When core drilling is used to test the quality of cast-in-place piles, core samples are taken from the pile foundation. Based on the core samples, the length of the pile foundation, concrete strength, thickness of sediment at the pile bottom, and condition of the bearing stratum can be clearly determined. However, core drilling is difficult to detect cracks in the grouting. According to relevant regulations, when using core drilling to test the quality of cast-in-place piles, in-hole photography should be used as an auxiliary method to further verify and identify defects in the pile body, determine the thickness of sediment, and identify the properties of the soil and rock in the bearing stratum at the pile tip.

[0003] The borehole imaging method fully utilizes optical principles, employing waterproof cameras and other devices to photograph the borehole walls inside the core borehole. This provides a visual representation of the borehole's internal conditions and stores the complete image information for subsequent analysis. However, during borehole imaging, the presence of sludge on the borehole walls, muddy water inside the borehole, and sediment at the bottom can prevent the camera from capturing clear images, thus hindering the provision of sufficient verification evidence.

[0004] Currently, to ensure the effectiveness of borehole imaging, the commonly used method for cleaning boreholes is high-pressure water cleaning. This involves using a high-pressure water jet to flush the borehole walls, removing any deposits on the surface, and then draining the turbid water from the borehole. However, this method is insufficient to achieve the required level of borehole cleanliness. The turbid water inside the borehole prevents clear images from being obtained during inspection, making it impossible to accurately assess the quality of the pile. Summary of the Invention

[0005] The main objective of this invention is to propose a construction system for cleaning the borehole wall of core holes in cast-in-place piles using video cameras and replacing turbid water inside the holes, aiming to improve the cleaning effect inside the core holes.

[0006] To achieve the above objectives, the present invention proposes a construction system for cleaning the borehole wall of core drilling holes and replacing turbid water in the borehole, comprising:

[0007] A scrubbing device, wherein the scrubbing device has a plurality of bristles on its periphery for scrubbing the borehole wall through the bristles, the scrubbing device also has a water inlet channel and a spray nozzle connected to the water inlet channel, the water inlet channel being for connecting to an external water source, and the spray nozzle being for spraying water toward the borehole wall; and

[0008] A turbid water replacement device includes a replacement pipe and a drain pipe. The replacement pipe has a water inlet end and a clean water inlet and a water outlet connected to the clean water inlet. The water outlet is located at the water inlet end. The clean water inlet is used to connect to an external clean water source. The drain pipe is connected to the replacement pipe and has a water inlet end extending relative to the water inlet end. The turbid water replacement device is used to insert the water inlet end into the upper part of the drill core hole after the scrubbing device scrubs the hole wall, and to make the water inlet end extend into the bottom of the drill core hole.

[0009] Optionally, the scrubbing device includes a scrubbing body, a connector assembly, and a rinsing nozzle. A plurality of the bristles are disposed on the outer peripheral surface of the scrubbing body. The scrubbing body has a water inlet channel. The connector assembly is installed at one end of the scrubbing body and communicates with the water inlet channel. The connector assembly is used to connect to an external water source. The rinsing nozzle is installed at the end of the scrubbing body away from the connector assembly and communicates with the water inlet channel. The rinsing nozzle has the spray nozzle.

[0010] Optionally, the water spray nozzle is located at the end of the rinsing nozzle away from the scrubbing body, and the water spray nozzle is flared; the rinsing nozzle is detachably connected to the scrubbing body.

[0011] Optionally, the washing body includes a water inlet pipe and a brush barrel, with the water inlet pipe forming the water inlet channel. One end of the water inlet pipe is connected to the connector assembly, and the other end is connected to the rinsing nozzle. The outer circumferential surface of the brush barrel is provided with bristles, and the brush barrel is sleeved outside the water inlet pipe. Alternatively, the washing body includes a water inlet pipe, a water outlet pipe, and a brush barrel, with the brush barrel forming the water inlet channel. The water inlet pipe is located at one end of the water inlet channel and connected to the connector assembly, and the water outlet pipe is located at the other end of the water inlet channel and connected to the rinsing nozzle.

[0012] Optionally, the end of the replacement pipe away from the water injection end is provided with an installation port, the drain pipe is installed in the replacement pipe through the installation port and extends out from the water injection end, the drain pipe and the installation port are sealed together, and a clean water channel is formed between the drain pipe and the inner wall of the replacement pipe, and both the clean water inlet and the water injection port are connected to the clean water channel.

[0013] Optionally, the turbid water replacement device further includes a sealing component, which is sleeved outside the replacement tube and used to seal against the wall of the replacement tube and the core hole when the replacement tube is inserted into the core hole.

[0014] Optionally, the sealing assembly includes an annular airbag and an inflation valve disposed on the annular airbag, the annular airbag being sleeved outside the replacement tube.

[0015] Optionally, the turbid water replacement device further includes an inlet valve and a pressure gauge, wherein the pressure gauge is located between the inlet valve and the clean water inlet.

[0016] Optionally, the turbid water replacement device further includes a water pump, and the drain pipe also has a drain end opposite to the water inlet end, the drain end being connected to the water pump; and / or, the drain pipe includes a drain steel pipe and a plastic pipe connected to the drain steel pipe, the end of the drain steel pipe away from the plastic pipe being the water inlet end.

[0017] Optionally, the turbid water replacement device further includes a fixing bracket, which is installed on the outside of the replacement tube to support the edge of the core hole when the replacement tube is inserted into the core hole.

[0018] This invention employs a brushing device to first flush the drilled core borehole. During the process of pushing the brushing device into the borehole, water jets from the nozzles wash the borehole walls, and the brush bristles further clean the borehole walls. When the brushing device is removed from the bottom of the borehole, it flushes the borehole walls again, effectively removing any adhering mud and improving the cleaning effect. Then, when replacing the turbid water in the borehole using a turbid water replacement device, clean water is injected from the top of the borehole and discharged from the bottom. This avoids the repeated flushing of mud-laden turbid water to the top of the borehole, ensuring a thorough and rapid replacement of the turbid water with clean water, significantly improving the efficiency of turbid water replacement in the borehole. This solution, by combining a brushing device and a turbid water replacement device, can effectively improve the cleaning effect inside the core borehole, creating clear working conditions for subsequent borehole camera inspection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the brushing device in one embodiment of the construction system for cleaning the hole wall of the core hole of the cast-in-place pile and replacing the turbid water inside the hole according to the present invention.

[0021] Figure 2 for Figure 1A schematic diagram of the brushing device used to brush the core hole; where Figure a is a schematic diagram of the brushing device placed at the opening of the core hole, Figure b is a schematic diagram of the brushing device placed at the bottom of the core hole, and Figure c is a schematic diagram of the brushing device being pulled up.

[0022] Figure 3 This is a schematic diagram of the turbid water replacement device in one embodiment of the construction system for cleaning the hole wall of the core hole of the cast-in-place pile and replacing the turbid water inside the hole according to the present invention.

[0023] Figure 4 for Figure 3 Schematic diagram of the middle replacement tube;

[0024] Figure 5 for Figure 3 Schematic diagram of the central drainage pipe;

[0025] Figure 6 for Figure 3 A schematic diagram of a medium-turbidity water replacement device during turbidity water replacement.

[0026] Explanation of icon numbers:

[0027] 10. Scrubbing device; 11. Scrubbing body; 111. Brush bristles; 112. Water inlet pipe; 113. Brush tube; 12. Rinsing nozzle; 13. Connector assembly; 131. Connecting pipe; 132. Quick connector; 20. Turbid water replacement device; 21. Replacement pipe; 211. Installation section; 212. Water injection end; 213. Water injection port; 214. Clean water inlet; 215. Installation port; 22. Drain pipe; 221. Drain steel pipe; 222. Plastic pipe; 23. Sealing assembly; 231. Annular airbag; 232. Inflatable hose; 24. Water inlet valve; 25. Pressure gauge; 26. Water pump; 27. Fixing bracket; 28. Gland head; 40. Drill hole; 50. Air pump.

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] This invention proposes a construction system for cleaning the borehole wall of core drilling holes and replacing turbid water inside the holes in cast-in-place piles.

[0033] In embodiments of the present invention, such as Figures 1 to 6 As shown, the construction system for cleaning and replacing turbid water inside the core hole 40 of the cast-in-place pile via video inspection includes a brushing device 10 and a turbid water replacement device 20. The brushing device 10 is provided with several bristles 111 on its periphery to brush the wall of the core hole 40. The brushing device 10 is also provided with a water inlet channel and a spray nozzle connected to the water inlet channel. The water inlet channel is used to connect to an external water source, and the spray nozzle is used to spray water toward the wall of the core hole 40. The turbid water replacement device 20 includes a replacement pipe 21 and a drain pipe 22. The replacement pipe 21 has a water inlet end 212 and is provided with a clean water inlet 214 and a water outlet 213 connected to the clean water inlet 214. The water outlet 213 is located at the water inlet end 212. The clean water inlet 214 is used to connect to an external clean water source. The drain pipe 22 is connected to the replacement pipe 21 and has a water inlet end that extends relative to the water inlet end 212. The turbid water replacement device 20 is used to install the water inlet end 212 into the upper part of the drill core hole 40 after the scrubbing device 10 scrubs the hole wall of the drill core hole 40, and to make the water inlet end extend into the bottom of the drill core hole 40.

[0034] Specifically, after drilling the core hole 40 using the drilling rig, before cleaning the hole, the drilling rig can be used to clean the hole to the original drilling depth at the original hole position. Then, the drilling rig's mud pump can be used to inject clean water into the bottom of the hole through the drill rod until clean water returns from the hole opening. Finally, the hole opening at the top of the pile can be sealed with a plug.

[0035] The diameter of the brushing device 10 at the bristles 111 is larger than the diameter of the drill hole 40, meaning that when the brushing device 10 is inserted into the drill hole 40, the bristles 111 abut against the inner wall of the drill hole 40. When cleaning the drill hole 40, the water inlet channel of the brushing device 10 is connected to a clean water source (e.g., a tap water pipe or a water tank pipe) via a plastic tube 222. After opening the valve, clean water is sprayed from the nozzle. After ensuring that the water flow from the nozzle is greater than the diameter of the drill hole 40, the brushing device 10 is inserted into the drill hole 40. Thus, as the brushing device 10 is gradually pushed into the drill hole 40 through the plastic tube 222, the water flow from the nozzle can rinse the wall of the drill hole 40, and the bristles 111 can also clean the wall of the drill hole 40. During the process of removing the scrubbing device 10 from the bottom wall of the core hole 40, the wall of the core hole 40 can be flushed again using the scrubbing device 10, so as to effectively remove the mud from the wall of the core hole 40.

[0036] After the scrubbing device 10 scrubs the borehole wall of the core hole 40, the turbid water replacement device 20 is installed at the opening of the core hole 40, so that the water injection end 212 of the replacement pipe 21 extends into the core hole 40, thereby positioning the water injection port 213 at the upper part of the core hole 40, while the water inlet end of the drain pipe 22 extends into the bottom of the core hole 40. By connecting the clean water inlet 214 of the replacement pipe 21 to a clean water source, water can be injected into the core hole 40 from the upper part through the water injection port 213, and drained from the bottom of the core hole 40 through the drain pipe 22. This allows the water in the core hole 40 to flow from top to bottom, effectively flushing the mud to the bottom of the core hole 40 and discharging it through the drain pipe 22. By gradually replacing the turbid water with clean water from top to bottom, the situation of turbid water carrying mud being repeatedly flushed to the upper part of the core hole 40 is avoided. This method can fully and quickly replace the turbid water in the core hole 40 with clean water, greatly improving the cleaning effect inside the core hole 40 and creating clear working conditions for subsequent in-hole camera inspection.

[0037] The technical solution of this invention employs a scrubbing device 10 to first flush the drill core hole 40. During the process of pushing the scrubbing device 10 into the drill core hole 40, the hole wall is rinsed by water jets from the nozzles, and the hole wall is also cleaned by the brush bristles 111. When the scrubbing device 10 is removed from the bottom wall of the drill core hole 40, it can be used again to flush the hole wall, effectively removing any adhering mud and improving the cleaning effect on the hole wall. Then, when replacing the turbid water in the core borehole 40 using the turbid water replacement device 20, clean water is injected from the top of the core borehole 40 and the turbid water is discharged from the bottom of the core borehole 40. This avoids the situation where turbid water carrying mud is repeatedly flushed to the top of the core borehole 40, and can fully and quickly replace the turbid water in the core borehole 40 with clean water, greatly improving the efficiency of turbid water replacement in the core borehole 40. In other words, this solution, by using the brushing device 10 and the turbid water replacement device 20 in combination, can effectively improve the cleaning effect inside the core borehole 40, creating clear working conditions for subsequent in-hole camera inspection.

[0038] In some embodiments, the scrubbing device 10 includes a scrubbing body 11, a connector assembly 13, and a rinsing nozzle 12. A plurality of bristles 111 are disposed on the outer peripheral surface of the scrubbing body 11. A water inlet channel is provided within the scrubbing body 11. The connector assembly 13 is installed at one end of the scrubbing body 11 and communicates with the water inlet channel. The connector assembly 13 is used to connect to an external water source. The rinsing nozzle 12 is installed at the end of the scrubbing body 11 away from the connector assembly 13 and communicates with the water inlet channel. The rinsing nozzle 12 has a spray nozzle. Specifically, the rinsing nozzle 12 sprays a conical water stream away from the scrubbing body 11 through the spray nozzle. That is, the outer contour of the water stream sprayed from the rinsing nozzle 12 through the spray nozzle is approximately conical. Specifically, it can be a solid conical water stream or an umbrella-shaped water stream (without water flow in the middle area). That is, the rinsing nozzle 12 can be a hollow conical nozzle or a solid conical nozzle. Compared to the method of setting water spray nozzles in the brushing part, setting the brushing part (brushing body 11) and the water spraying part (rinsing nozzle 12) separately can simplify the structure of the brushing body 11, reduce manufacturing difficulty, and reduce production costs. Moreover, when water is sprayed at the front end by the rinsing nozzle 12, the water pressure can be greater, which can better wash off the mud on the borehole wall of the core hole 40, thereby improving the cleaning efficiency of the borehole wall.

[0039] In some embodiments, the spray nozzle is located at the end of the rinsing nozzle 12 away from the scrubbing body 11, and the spray nozzle is flared. This allows water to spray outwards along the inner wall of the nozzle when it exits, thus producing a better conical water flow. This simple structure simplifies the design of the rinsing nozzle 12. Of course, in other embodiments, multiple spray nozzles can be provided at the spraying end of the rinsing nozzle 12, with the nozzles angled outwards relative to the axis of the rinsing nozzle 12.

[0040] In some embodiments, the rinsing nozzle 12 is detachably connected to the scrubbing body 11. Specifically, the rinsing nozzle 12 and the scrubbing body are connected by a threaded structure to facilitate disassembly. This allows for easy replacement of the corresponding part when either the rinsing nozzle 12 or the scrubbing body 11 is damaged, reducing maintenance costs.

[0041] The specific structure of the scrubbing body 11 can vary. For example, in some embodiments, the scrubbing body 11 includes a water inlet pipe 112 and a brush cylinder 113. A water inlet channel is formed inside the water inlet pipe 112. One end of the water inlet pipe 112 is connected to the connector assembly 13, and the other end is connected to the rinsing nozzle 12. The outer circumferential surface of the brush cylinder 113 is provided with bristles 111, and the brush cylinder 113 is sleeved outside the water inlet pipe 112. This arrangement facilitates the separate manufacture or purchase of the brush cylinder 113, simplifying the structure of the scrubbing body 11 and reducing production costs. Optionally, the brush cylinder 113 can be detachably connected to the water inlet pipe 112 for replacement after the bristles 111 outside the brush cylinder wear out.

[0042] In other embodiments, the scrubbing body 11 includes a water inlet pipe 112, a water outlet pipe, and a brush barrel 113. A water inlet channel is formed within the brush barrel 113. The water inlet pipe 112 is located at one end of the water inlet channel and connected to the connector assembly 13. The water outlet pipe is located at the other end of the water inlet channel and connected to the rinsing nozzle 12. This arrangement ensures a stable connection between the brush barrel 113 and the water inlet pipe 112 and water outlet pipe to prevent leakage, reducing the risk of the brush barrel 113 loosening during the cleaning process. Optionally, both the water inlet pipe 112 and the water outlet pipe are screwed into the water inlet channel for easy replacement of the brush barrel 113.

[0043] In some embodiments, the connector assembly 13 includes a connecting pipe 131 and a quick connector 132. One end of the connecting pipe 131 is connected to the brush body 11, and the other end is connected to the quick connector 132. Specifically, the quick connector 132 has a relatively simple connection method, enabling quick installation of the water source pipe and connection to the water inlet channel. Alternatively, in other embodiments, the connecting pipe 131 is connected and fixed to the tap water pipe using a wire.

[0044] In some embodiments, the end of the replacement pipe 21 away from the water inlet 212 is provided with an installation port 215. The drain pipe 22 is installed inside the replacement pipe 21 through the installation port 215 and extends out from the water inlet 212. The drain pipe 22 and the installation port 215 are sealed together. A clear water channel is formed between the drain pipe 22 and the inner wall of the replacement pipe 21. Both the clear water inlet 214 and the water inlet 213 are connected to the clear water channel. Specifically, during installation, the drain pipe 22 can be inserted into the replacement pipe 21 from the water inlet 212 and then extend out from the installation port 215, or the drain pipe 22 can be inserted into the replacement pipe 21 from the installation port 215 and then extend out from the water inlet 212, depending on actual needs. The water inlet 213 is located on the end face of the water inlet 212, that is, when the replacement pipe 21 is sleeved over the drain pipe 22, the actual water inlet 213 is located in the part between the water inlet 212 and the drain pipe 22. The clear water inlet 214 is located on the side of the replacement pipe 21. By placing the drain pipe 22 inside the replacement pipe 21, the replacement pipe 21 and the drain pipe 22 can be installed as a single unit, facilitating the installation and fixation of the turbid water replacement device 20 at the core bore 40. By sealing the drain pipe 22 with the mounting port 215, leakage of clean water entering from the clean water inlet 214 through the mounting port 215 can be prevented, allowing the clean water to flow better towards the bottom of the core bore 40. Of course, in other embodiments, the water inlet 213 can also be located on the side of the water inlet end 212. Additionally, in other embodiments, the drain pipe 22 can be fixed to the outside of the replacement pipe 21.

[0045] In some embodiments, the turbid water replacement device 20 further includes a sealing component 23, which is sleeved outside the replacement tube 21 and used to seal against the wall between the replacement tube 21 and the core hole 40 when the replacement tube 21 is installed into the core hole 40. That is, when the replacement tube 21 is installed into the core hole 40, the sealing component 23 can seal the gap between the outer circumferential surface of the replacement tube 21 and the core hole 40 wall, thereby preventing clean water injected from the water inlet 213 from flowing directly upwards out of the core hole 40 opening, ensuring that clean water can only flow from top to bottom within the core hole 40, thus guaranteeing the sewage replacement effect. Moreover, with this configuration, even without a water pump, the turbid water in the core hole 40 can be discharged. Furthermore, the method of placing the drain pipe 22 inside the replacement tube 21 facilitates sealing the gap between the outer circumferential surface of the replacement tube 21 and the core hole 40 wall, improving the sealing effect. Of course, in other embodiments, a drain pump can also be installed only at the drain end of the drain pipe 22.

[0046] In some embodiments, the sealing assembly 23 includes an annular airbag 231 and an inflation valve disposed on the annular airbag 231, which is sleeved over the replacement tube 21. That is, before the replacement tube 21 is inserted into the core bore 40, the annular airbag 231 is in an uninflated state. After the replacement tube 21 and the drain pipe 22 are inserted into the core bore 40, air is injected into the annular airbag 231 through the inflation valve, causing the annular airbag 231 to expand and fill the space between the outer circumference of the replacement tube 21 and the wall of the core bore 40, thus achieving a seal. This facilitates sealing installation and improves the sealing effect. Of course, in other embodiments, the sealing assembly 23 includes an annular cover plate that is sealed and sleeved over the replacement tube 21, sealing the opening of the core bore 40.

[0047] Optionally, the inflation valve and the annular airbag 231 are connected by an inflation hose 232, that is, when the annular airbag 231 is inserted into the drill hole 40, the inflation valve can be extended outside the drill hole 40 to facilitate inflation and deflation operations.

[0048] In some embodiments, the turbid water replacement device 20 further includes an inlet valve 24 and a pressure gauge 25, with the pressure gauge 25 positioned between the inlet valve 24 and the clean water inlet 214. Specifically, when the inlet valve 24 is opened, clean water can enter the clean water inlet 214, while when the inlet valve 24 is closed, clean water can be prevented from entering the clean water inlet 214 (core hole 40), facilitating control. By installing the pressure gauge 25 between the inlet valve 24 and the clean water inlet 214, the water pressure within the core hole 40 during the entire turbid water replacement process can be monitored. This allows for the timely detection of abnormalities such as abnormal sealing structures of the turbid water replacement device 20 or blockages in the drain pipe 22, thereby improving the efficiency of turbid water replacement within the core hole 40.

[0049] In some embodiments, the turbid water replacement device 20 further includes a water pump 26, and the drain pipe 22 has a drain end opposite to the water inlet end, which is connected to the water pump 26. This configuration can accelerate the replacement speed of turbid water in the core hole 40, thereby improving the efficiency of turbid water replacement in the core hole 40 and shortening the construction time. Of course, in other embodiments, when the gap between the outer peripheral surface of the replacement pipe 21 and the hole wall of the core hole 40 is sealed by the sealing component 23, the water pump 26 may not be required.

[0050] Optionally, the water pump is a model YJY220V, powered by a built-in lithium battery, with a suction lift of 8-10m and a flow rate of 25-30m³ / h. 3 / h, which increases the force of pumping out turbid water.

[0051] In some embodiments, the drain pipe 22 includes a drain steel pipe 221 and a plastic pipe 222 connected to the drain steel pipe 221, with the end of the drain steel pipe 221 away from the plastic pipe 222 serving as the water inlet. This configuration allows the weight of the drain steel pipe 221 to ensure the water inlet can reach the bottom of the drill core hole 40 during installation, while the plastic pipe 222 is easy to roll up, reducing space requirements and facilitating installation.

[0052] In some embodiments, the turbid water replacement device 20 further includes a fixing bracket 27, which is installed on the outside of the replacement tube 21 to support the replacement tube 21 at the edge of the core hole 40 when it is inserted into the core hole 40. That is, the fixing bracket 27 can prevent the replacement tube 21 from falling into the core hole 40. The fixing bracket can be plate-shaped or rod-shaped.

[0053] The system for cleaning the borehole wall and replacing turbid water in the core hole of cast-in-place piles can be constructed using the following method, which includes the following steps:

[0054] Step S20: Fabricate a turbid water replacement device 20. The turbid water replacement device 20 includes a replacement pipe 21 and a drain pipe 22. The replacement pipe 21 has a water inlet end 212 and an installation section 211 near the water inlet end 212, and is provided with a clean water inlet 214 and a water inlet 213 connected to the clean water inlet 214. The water inlet 213 is located at the water inlet end 212. The drain pipe 22 is connected to the replacement pipe 21 and has a water inlet end that extends relative to the water inlet end 212.

[0055] Step S30: Insert the water inlet 212 and drain pipe 22 of the replacement pipe 21 into the core hole 40, so that the water inlet 213 is located at the upper part of the core hole 40, the installation section 211 is located between the opening of the core hole 40 and the water inlet 213, and the water inlet of the drain pipe 22 extends into the bottom of the core hole 40.

[0056] Step S40: The gap between the sealing installation section 211 and the hole wall of the core hole 40;

[0057] Step S50: Inject clean water into the core hole 40 through the water inlet 213 of the turbid water replacement device 20, so that the turbid water in the core hole 40 is discharged from the drain pipe 22 until all the turbid water in the core hole 40 is replaced with clean water.

[0058] In step S20, the length of the drain pipe 22 extending relative to the water inlet 212 can be determined first, and then the drain pipe 22 can be fixed to the replacement pipe 21. Alternatively, the replacement pipe 21 and the drain pipe 22 can be prepared separately (for example, the required connectors can be installed on the replacement pipe 21 and the drain pipe 22 respectively).

[0059] In step S30, installation can be performed according to the installation structure of the replacement pipe 21 and the drain pipe 22. For example, if the drain pipe 22 and the replacement pipe 21 have already been fixed in step S20, first insert the water inlet end of the drain pipe 22 into the core hole 40, then fix the replacement pipe 21 and the drain pipe 22 installed on the replacement pipe 21 at the opening of the core hole 40. After installation, the water inlet 213 should be located at the upper part of the core hole 40, and the water inlet end of the drain pipe 22 should extend into the bottom of the core hole 40. Alternatively, if the replacement pipe 21 and the drain pipe 22 have not been pre-fitted and fixed in step S20, the drain pipe 22 can be inserted into the core hole 40 first, and then the replacement pipe 21 can be placed at the opening of the core hole 40. After ensuring that the water inlet end of the drain pipe 22 is located at the bottom of the core hole 40, the drain pipe 22 and the replacement pipe 21 can be fixed.

[0060] In step S40, the gap between the mounting section 211 and the borehole wall 40 is sealed by the sealing component 23. This ensures that when clean water enters the borehole 40 from the water inlet 213, the water can only flow downwards along the borehole 40, preventing the water injected from the water inlet 213 from flowing directly upwards out of the borehole 40. This allows the turbid water to gradually flow downwards and be discharged from the drain pipe 22, ensuring effective wastewater replacement. Furthermore, this configuration allows the turbid water in the borehole 40 to be discharged even without a water pump.

[0061] In step S50, when the replacement pipe 21 is connected to a clean water source, the water valve is opened so that clean water is injected into the core hole 40 from the water inlet 213, and the turbid water in the core hole 40 is discharged from the drain pipe 22 until all the turbid water in the core hole 40 is replaced with clean water, that is, the turbid water in the outer core hole 40 is replaced.

[0062] By gradually replacing the turbid water with clean water from top to bottom, the situation of turbid water carrying mud being repeatedly flushed to the upper part of the core hole 40 is avoided. This method can fully and quickly replace the turbid water in the core hole 40 with clean water, greatly improving the cleaning effect inside the core hole 40 and creating clear working conditions for subsequent in-hole camera inspection.

[0063] By employing a turbid water replacement device 20 equipped with a replacement pipe 21 and a drain pipe 22, during use, the water inlet 212 of the replacement pipe 21 and the drain pipe 22 are inserted into the core bore 40, with the water inlet 213 positioned at the upper part of the core bore 40. The mounting section 211 on the replacement pipe 21 is located between the opening of the core bore 40 and the water inlet 213, and the water inlet of the drain pipe 22 extends into the bottom of the core bore 40. The gap between the mounting section 211 and the wall of the core bore 40 is then sealed by the sealing assembly 23. Thus, when clean water is injected into the core bore 40 through the water inlet 213 of the replacement pipe 21, the clean water can only flow downwards along the core bore 40, thereby forcing the turbid water in the core bore 40 to flow towards the bottom of the core bore 40 and be discharged from the drain pipe 22. In this way, during the replacement process, the turbid water carrying mud is not repeatedly flushed to the upper part of the core hole 40, and the turbid water in the core hole 40 can be fully and quickly replaced with clean water, which greatly improves the efficiency of replacing the turbid water in the core hole 40.

[0064] In some embodiments, prior to step S10, the following steps are also included:

[0065] Use a plastic pipe 222 to connect the scrubbing device 10 and a clean water source to supply water to the scrubbing device 10;

[0066] Using plastic tube 222, the scrubbing device 10 is lowered at a constant speed from the opening of the core hole 40 so that the water spray nozzle and brush bristles 111 on the scrubbing device 10 can be used to scrub the hole wall of the core hole 40 until the scrubbing device 10 reaches the bottom of the core hole 40.

[0067] Place the scrubbing device 10 at the bottom of the core hole 40 until clean water continuously flows out of the core hole 40.

[0068] Pull up the plastic tube 222 until the scrubbing device 10 is removed from the drill hole 40;

[0069] Remove the plastic tube 222 from the scrubbing device 10 and the clean water source.

[0070] Specifically, the diameter of the brush bristles 111 of the scrubbing device 10 is larger than the diameter of the drill hole 40, meaning that when the scrubbing device 10 is inserted into the drill hole 40, the bristles 111 abut against the inner wall of the drill hole 40. During cleaning of the drill hole 40, the water inlet channel of the scrubbing device 10 and the clean water source are connected via a plastic tube 222. After opening the valve, clean water is sprayed from the nozzle. Once the water flow range from the nozzle is ensured to be greater than the diameter of the drill hole 40, the scrubbing device 10 is inserted into the drill hole 40.

[0071] The scrubbing device 10, along with the plastic tube 222, is lowered at a constant speed from the opening of the core hole 40 to the bottom of the core hole 40. During the descent, the water jets from the nozzles wash the walls of the core hole 40, and the bristles 111 clean the walls as well. When the plastic tube 222 can no longer be lowered, the depth markings on the tube are checked and compared with the depth of the core hole 40 to ensure that the scrubbing device 10 reaches the bottom of the core hole 40 and that the cleaning is thorough. After clean water returns from the opening of the core hole 40, the scrubbing device 10 is left to stand at the bottom of the core hole 40 for several minutes until clean water continues to return, at which point the first cleaning of the hole walls is complete. The plastic tube 222 is then raised at a constant speed, and during the ascent, the water jets from the nozzles 12 and the bristles 111 clean the hole walls again. Pull up the plastic tube 222 until the scrubbing device 10 is pulled out of the core hole 40, then turn off the water valve on the tap to complete the secondary hole wall cleaning. Finally, unscrew the quick connector 132 of the scrubbing device 10 and remove the scrubbing device 10 from the plastic tube 222 for use in the next core hole 40.

[0072] By using a combination of the brushing device 10 and the turbid water replacement device 20, the cleaning effect inside the core hole 40 can be effectively improved, creating clear working conditions for subsequent in-hole camera inspection.

[0073] In some embodiments, the end of the replacement pipe 21 away from the water injection end 212 is provided with an installation port 215, and the drain pipe 22 includes a plastic pipe 222 and a drain steel pipe 221;

[0074] Step S20 includes the following steps:

[0075] Connect one end of the plastic pipe 222 to the drainage steel pipe 221;

[0076] Step S30 includes the following steps:

[0077] Insert the drainage steel pipe 221 into the core hole 40 until the water inlet end of the drainage steel pipe 221 reaches the bottom of the core hole 40;

[0078] Insert the end of the plastic pipe 222 away from the drainage steel pipe 221 into the replacement pipe 21 from the water injection end 212, and pass it out from the installation port 215;

[0079] Insert the water injection end 212 of the replacement pipe 21 into the upper part of the core hole 40.

[0080] This design utilizes the weight of the drain steel pipe 221 to ensure the inlet end can reach the bottom of the core hole 40, while the plastic pipe 222 is easy to roll up, reducing space requirements and facilitating installation. Before assembling the drain pipe 221 and the replacement pipe 21, the drain steel pipe 221 and plastic pipe 222 are first placed into the core hole 40. This allows for placement of the drain steel pipe 221 and plastic pipe 222 without being restricted by the replacement pipe 21, facilitating adjustment during placement and ensuring that the drain steel pipe 221 reaches the bottom of the core hole 40. Optionally, the plastic pipe 222 and the drain steel pipe 221 are connected via a quick connector 132 for easy assembly and disassembly.

[0081] In some embodiments, after step S40, the following steps are further included:

[0082] Seal the gap between the plastic tube 222 and the mounting port 215.

[0083] Specifically, a gland 28 is installed at the installation port 215. The plastic tube 222 passes through the gland 28 and is then sealed to the outside of the plastic tube 222 by the gland 28. That is, in step S20, the gland 28 is first installed at the installation port 215 of the replacement pipe 21, and the locking nut of the gland 28 is loosened. After the plastic tube 222 passes through the gland 28, and after ensuring that the drainage steel pipe 221 and the replacement pipe 21 are in place, the locking nut on the gland 28 is tightened. This locks the plastic tube 222 to the outside, achieving fixation and sealing. This prevents clean water from flowing out from the gap between the plastic tube 222 and the installation port 215, which is beneficial for improving the efficiency of turbid water replacement in the core hole 40. Furthermore, using the gland 28 to seal the gap between the plastic tube 222 and the installation port 215 also stably fixes the plastic tube 222 to the replacement pipe 21, enabling it to withstand greater pressure. Of course, in other embodiments, a cover plate can also be installed at the mounting port 215, and the cover plate is provided with a through hole so that the plastic tube 222 is interference-fitted or transition-fitted with the through hole.

[0084] In some embodiments, the sealing assembly 23 includes an annular airbag 231, an inflation hose 232, and an inflation valve. The annular airbag 231 is sleeved outside the mounting section 211, and the inflation hose 232 connects the annular airbag 231 and the inflation valve. When the water injection end 212 of the replacement tube 21 is inserted into the core bore 40, the annular airbag 231 is located inside the core bore 40. The inflation valve inflates the annular airbag 231, causing the sealing airbag to fill the space between the replacement tube 21 and the bore 40 wall. That is, before the replacement tube 21 is inserted into the core bore 40, the annular airbag 231 is in an uninflated state. After the replacement tube 21 and the drain tube 22 are inserted into the core bore 40, the inflation valve inflates the annular airbag 231, causing it to expand and fill the space between the outer circumference of the replacement tube 21 and the bore 40 wall, thus achieving a seal. This facilitates sealing installation and improves the sealing effect. The inflation hose 232 allows the inflation valve to extend beyond the drill core hole 40, facilitating inflation and deflation operations.

[0085] In some embodiments, step S50, which involves injecting clean water into the core borehole 40 through the water inlet 213 of the turbid water replacement device 20, includes the following steps:

[0086] Connect the clean water inlet 214 to an external clean water source;

[0087] Open the water inlet valve 24 and inject clean water into the core hole 40 until clean water is discharged from the plastic tube 222;

[0088] Adjust the water inlet valve 24 to release pressure in the drill core hole 40 until clean water is continuously discharged from the plastic tube 222;

[0089] Close the inlet valve 24 to stop water from being injected into the core hole 40.

[0090] Specifically, after opening the inlet valve 24 and injecting clean water into the core borehole 40, the turbid water in the core borehole 40 gradually drains out through the plastic tube 222. When clean water is discharged from the plastic tube 222, it indicates that the turbid water in the core borehole 40 has been largely replaced. At this time, by adjusting the inlet valve 24, the amount of clean water entering is reduced, thereby reducing the pressure in the core borehole 40 (in the embodiment with the gland 28, the locking nut of the gland 28 can be loosened simultaneously to release pressure in the core borehole 40 through the gap between the plastic tube 222 and the gland 28), thus releasing the pressure of the sealed water in the core borehole 40. This allows some of the turbid water that has entered the borehole wall fissures to return to the core borehole 40. Under this normal pressure, the circulation of turbid water replacement continues until all the turbid water returning from the fissures to the core borehole 40 is replaced with clean water, that is, clean water is continuously discharged from the plastic tube 222, indicating that the turbid water replacement is complete. Close the inlet valve 24 to stop injecting water into the core borehole 40, and finally disconnect the turbid water replacement device 20 from the clean water source. The turbid water replacement device 20 can then be disassembled. The inlet valve 24 can be either the inlet valve of the turbid water replacement device 20 or a valve from a clean water source (such as a tap water valve). This configuration effectively replaces the turbid water in the fissures of the core borehole 40 wall, preventing subsequent seepage of turbid water into the core borehole 40 and significantly improving the turbid water replacement effect.

[0091] Following step S50, the following steps are also included:

[0092] The annular airbag 231 is deflated using the inflation valve; specifically, the connection between the air pump 50 and the annular airbag 231 is disconnected, and the valve core of the inflation valve is pressed to release the pressure inside the annular airbag 231. At this time, the annular airbag 231 releases the pressure and seal between itself and the borehole wall of the core hole 40.

[0093] Remove the replacement tube 21 from the drill hole 40; that is, disconnect the water pipe from the replacement device, lift the fixed bracket 27, and remove the replacement device from the hole.

[0094] Pull up the plastic pipe 222 to remove the drainage steel pipe 221 from the drill hole 40, and disassemble the drainage steel pipe 221 and the displacement device connected to the plastic pipe 222;

[0095] Organize and tidy up the parts for reuse in other core hole 40 replacement construction.

[0096] After the cleaning operation of the core hole 40 using the scrubbing device 10 is completed, the core hole 40 is replaced with turbid water using the turbid water replacement device 20. This involves disconnecting the plastic pipe 222 from the scrubbing device 10 and the water pipe, connecting the bottom end of the plastic pipe 222 to the drainage steel pipe 221, and lowering both to the bottom of the hole. The drainage steel pipe 221 and the plastic pipe 222 serve as drainage channels for the turbid water replacement process, draining the replaced turbid water from the core hole 40. The replacement pipe 21 has a larger diameter than the plastic pipe 222. After the top end of the plastic pipe 222 passes through the replacement pipe 21 of the turbid water replacement device 20, the turbid water replacement device 20 is placed at the opening of the core hole 40. The original diameter of the annular airbag 231 is smaller than the diameter of the core hole 40. After the replacement tube 21 is installed in the drill hole 40 (i.e., after the annular airbag 231 is located in the drill hole 40), the air pump 50 is connected to inflate the annular airbag 231. After the annular airbag 231 expands, its diameter is larger than its original diameter (for example, when the original diameter of the annular airbag 231 is 90mm, the diameter of the annular airbag 231 after expansion can reach 105mm), which can fully contact the hole wall to seal the hole opening and form a closed space inside the drill hole 40. At this point, the entry of clean water and the discharge of turbid water can only be achieved through the turbid water replacement device 20. The turbid water replacement device 20 is connected to a tap water pipe through the clean water inlet 214. Clean water enters the replacement pipe 21 from the water inlet 213. After tightening the gland 28 at the top of the turbid water replacement device 20, under the pressure of the tap water, clean water continuously enters the borehole along the interval between the replacement pipe 21 and the plastic pipe 222. The original turbid water in the core hole 40 is forced upward through the drainage steel pipe 221 and then discharged outside the core hole along the plastic pipe 222. A pressure pump 26 is connected to the part of the plastic pipe 222 outside the borehole to accelerate the turbid water replacement speed. The replacement cycle of entering clean water and discharging turbid water continues until clean water is continuously discharged, indicating that all the turbid water in the hole has been replaced with clean water, and the turbid water replacement process in the hole is complete.

[0097] This construction method uses the cylindrical brush of the scrubbing device 10 and the resulting conical high-pressure water flow to clean the borehole wall of the core hole 40 from top to bottom during the lowering of the scrubbing device 10, and then performs a second cleaning from bottom to top during the pulling of the scrubbing device 10 from the bottom of the hole. The two cleaning processes thoroughly remove the mud adhering to the hole wall, ensuring that the wall is clean.

[0098] The annular airbag 231 of the turbid water replacement device 20 seals the opening of the core hole 40, creating a sealed space inside the core hole 40. This increases the internal pressure of the core hole 40 when clean water is injected into it. A water pump 26 with a lithium battery is connected to the drain end of the drain pipe 22 to accelerate the discharge of turbid water. By continuously injecting clean water into the core hole 40, the turbid water inside the core hole 40 is quickly replaced and discharged, improving the efficiency of turbid water replacement and significantly improving the hole cleaning effect. This creates clear working conditions for subsequent in-hole camera inspection.

[0099] The scrubbing device 10 and the turbid water replacement device 20 are easy to disassemble and can be reused. When cleaning the hole, simply connect the scrubbing device 10 and the turbid water replacement device 20 to the water source at the construction site. The operation is convenient, the applicability is strong, the hole cleaning time is greatly shortened, and the overall cost is economical.

[0100] Based on practical experience, the project's foundation type is cast-in-place piles, with a total of 712 foundation piles, ranging from Ф800mm to Ф1800mm in diameter and 30m to 70m in drilling depth, using loose, strongly weathered granite as the bearing layer.

[0101] Traditional methods for cleaning inspection boreholes typically involve high-pressure water removal. The water pressure during high-pressure water cleaning should be between 0.5 MPa and 2.0 MPa, and the resulting turbid water is then replaced with clean water. This method requires a high-pressure pump with a large capacity to deliver high-pressure water, making the process cumbersome. Furthermore, it generally only removes mud and rock powder from the borehole surface, failing to remove blockages in the fissures, thus making it difficult to achieve the requirements for borehole imaging.

[0102] According to on-site statistics, using the traditional method to complete the in-hole video inspection of a core hole takes an average of 2 days. The required equipment mainly includes a high-pressure 05 water jet cleaner, a water pump, and an in-hole camera. Based on the specific circumstances of this project, it was confirmed that 70 test piles were selected, with a total time of 70 * 2 = 140 days.

[0103] The main construction machinery includes a high-pressure water jet cleaner and an in-hole camera. Calculated at a base price of 900 yuan per shift for the high-pressure water jet cleaner and 500 yuan per shift for the in-hole camera, the total equipment cost per day is approximately 900 + 500 = 1400 yuan. Therefore, the cost of using the in-hole camera inspection operation required to complete the above project using traditional methods is 1400 * 140 = 196,000 yuan.

[0104] The construction method described in this invention is employed.

[0105] According to on-site statistics, the average time to complete the in-hole video inspection of one core hole using this construction method is 0.5 days. The required equipment includes a self-made borehole wall cleaning device and a borehole turbid water replacement device, a water pump, and an in-hole camera. Based on the specific circumstances of this project, and after confirmation by all relevant parties, 70 inspection piles were selected, with a total time of: 70 * 0.5 = 35 days.

[0106] Compared with traditional construction methods, this construction method costs 400 yuan per shift for the self-made borehole wall cleaning and borehole turbid water replacement device, 400 yuan per shift for the water pump, and 500 yuan per shift for the borehole camera. Therefore, the total equipment cost per day is approximately 400 + 400 + 500 = 1300 yuan. The cost of using the borehole camera inspection operation required to complete the above project is 1300 * 35 = 45500 yuan.

[0107] Based on the economic benefit analysis of the two construction methods, for the above project, the traditional construction method costs approximately 196,000 yuan and takes 140 days, while the construction method of this project costs approximately 45,500 yuan and takes 35 days. That is, the construction method of this project saves 150,500 yuan and 105 days compared to the traditional construction method, resulting in a significant reduction in construction costs and overall cost economy.

[0108] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A construction system for cleaning the borehole wall and replacing turbid water in the borehole of a core drilling hole for cast-in-place piles, characterized in that, include: A scrubbing device is provided with a plurality of bristles on its periphery to scrub the borehole wall of the core hole. The scrubbing device is also provided with a water inlet channel and a spray nozzle connected to the water inlet channel. The water inlet channel is used to connect to an external water source, and the spray nozzle is used to spray water toward the borehole wall of the core hole. A turbid water replacement device is also provided, including a replacement pipe and a drain pipe. The replacement pipe has a water inlet end and a clean water inlet and a water outlet connected to the clean water inlet. The water outlet is located at the water inlet end. The clean water inlet is used to connect to an external clean water source. The drain pipe is connected to the replacement pipe and has a water inlet end extending relative to the water inlet end. The turbid water replacement device is used to insert the water inlet end into the upper part of the core hole after the scrubbing device has scrubbed the borehole wall of the core hole, and to extend the water inlet end into the bottom of the core hole. The replacement pipe has an installation port at one end away from the water injection end. The drain pipe is installed inside the replacement pipe through the installation port and extends out from the water injection end. The drain pipe and the installation port are sealed together. A clear water channel is formed between the drain pipe and the inner wall of the replacement pipe. Both the clear water inlet and the water injection port are connected to the clear water channel. The turbid water replacement device also includes a sealing component, which is sleeved outside the replacement tube and is used to seal against the wall of the replacement tube and the core hole when the replacement tube is inserted into the core hole.

2. The construction system for washing and replacing turbid water in a camera hole wall of a bored core hole of a cast-in-place pile according to claim 1, characterized in that, The scrubbing device includes a scrubbing body, a connector assembly, and a rinsing nozzle. A plurality of bristles are disposed on the outer peripheral surface of the scrubbing body. The scrubbing body has a water inlet channel. The connector assembly is installed at one end of the scrubbing body and communicates with the water inlet channel. The connector assembly is used to connect to an external water source. The rinsing nozzle is installed at the end of the scrubbing body away from the connector assembly and communicates with the water inlet channel. The rinsing nozzle has a spray nozzle.

3. The construction system for washing and replacing turbid water in a camera hole wall of a bored core hole of a cast-in-place pile according to claim 2, characterized in that, The water spray nozzle is located at the end of the rinsing nozzle away from the scrubbing body, and the water spray nozzle is flared; the rinsing nozzle is detachably connected to the scrubbing body.

4. The construction system for washing and replacing turbid water in a camera hole wall of a bored core hole of a cast-in-place pile according to claim 2, characterized in that, The scrubbing body includes a water inlet pipe and a brush barrel. The water inlet pipe forms a water inlet channel. One end of the water inlet pipe is connected to the connector assembly, and the other end is connected to the rinsing nozzle. The outer circumferential surface of the brush barrel is provided with bristles, and the brush barrel is sleeved outside the water inlet pipe. Alternatively, the scrubbing body includes a water inlet pipe, a water outlet pipe, and a brush barrel. The brush barrel forms a water inlet channel. The water inlet pipe is located at one end of the water inlet channel and is connected to the connector assembly. The water outlet pipe is located at the other end of the water inlet channel and is connected to the rinsing nozzle.

5. The construction system for washing and replacing turbid water in a camera hole wall of a bored core hole of a cast-in-place pile according to claim 1, characterized in that, The sealing assembly includes an annular airbag and an inflation valve disposed on the annular airbag, the annular airbag being sleeved outside the replacement tube.

6. The construction system for washing and replacing turbid water in a camera hole wall of a bored core hole of a cast-in-place pile according to claim 5, wherein The turbid water replacement device also includes an inlet valve and a pressure gauge, with the pressure gauge located between the inlet valve and the clean water inlet.

7. The construction system for wash and replacement of turbid water in the core hole of a cast-in-place pile according to any one of claims 5 to 6, characterized in that, The turbid water replacement device further comprises a water pump, the drain pipe further has a drain end opposite to the water inlet end, and the drain end is connected with the water pump; and / or the drain pipe comprises a drain steel pipe and a plastic pipe connected with the drain steel pipe, and the water inlet end is located at an end of the drain steel pipe away from the plastic pipe.

8. The construction system for washing and replacing turbid water in a camera hole wall of a bored core hole of a cast-in-place pile according to any one of claims 1 to 6, characterized in that, The turbid water replacement device further comprises a fixing support installed outside the replacement pipe to support the edge portion of the drill core hole when the replacement pipe is installed into the drill core hole.

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