Treatment method for pipe blockage of underwater cast-in-place pile

Abstract

The invention belongs to the technical field of bridge pile foundation construction, and discloses a treatment method for pipe blockage of an underwater cast-in-place pile, which comprises the following steps: firstly, reinforcing a fixing bracket of a guide pipe, then mounting a pile foundation orifice protective cover on the guide pipe, and extending a drill bit of a long spiral drilling machine into the guide pipe to ensure the drilling accuracy of the drill bit; cement paste is sprayed to the inner wall of the guide pipe through the drill bit, so that concrete on the inner wall of the guide pipe falls, and smoothness of the guide pipe is guaranteed. And then the drill bit rotates reversely to stir the cement paste and the concrete in the guide pipe, the cement paste and the concrete can be fully mixed, and the pile body quality can be improved. And then, the drill bit is lifted, so that the concrete in the guide pipe is subjected to a slump experiment to meet the workability index, the concrete is ensured to have good flowability and plasticity, and the risk of pipe blockage is reduced. Through the arrangement, the treatment method for pipe blockage of the underwater cast-in-place pile can effectively solve the problem of pipe blockage of concrete, and the quality of a pile body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge pile foundation construction, and in particular to a method for processing underwater cast-in-place pile pipe blockage. Background Art

[0002] At present, there are many reasons for pipe blockage during bridge pile foundation construction, the common reasons are:

[0003] 1. Unreasonable concrete mix ratio: If the slump of concrete does not meet the requirements, it may cause concrete caking and segregation, which in turn causes pipe blockage; 2. Poor workability of concrete: If the concrete is not fully mixed or is mixed unevenly, it will lead to poor workability of concrete, water seepage and segregation, which will cause pipe blockage; 3. Too long pouring time: If the underwater concrete pouring time is too long, or the pouring operation is interrupted for too long, the surface concrete will initially solidify and lose fluidity, making the pile body concrete unable to turn over, which will also cause pipe blockage; 4. Conduit leakage: Leakage at the connection of the conduit reduces the workability of the concrete in the conduit and loses fluidity.

[0004] Therefore, there is an urgent need for a method for treating underwater cast-in-place pile pipe blockage to solve the problem of concrete pipe blockage and avoid pile body defects or even broken piles caused by concrete pipe blockage. Summary of the invention

[0005] The purpose of the present invention is to provide a method for treating pipe blockage of underwater cast-in-place piles, which can effectively solve the problem of concrete pipe blockage and improve the quality of the pile body.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A method for treating underwater cast-in-place pile pipe blockage, comprising:

[0008] Step 1: Strengthen the fixing bracket of the catheter;

[0009] Step 2: Install the pile foundation hole protection cover on the conduit;

[0010] Step 3: Insert the drill bit of the long spiral drill into the conduit;

[0011] Step 4: During the drilling process of the drill bit in the conduit, cement slurry is sprayed toward the inner wall of the conduit through the drill bit;

[0012] Step 5: Reverse the drill bit to mix the cement slurry and concrete in the conduit;

[0013] Step 6: Lift the drill bit;

[0014] Step 7: Conduct a slump test on the concrete in the conduit to meet the workability index.

[0015] Optionally, before step one, a long auger is put in place so that the drill bit is aligned with the center of the pile position.

[0016] Optionally, in step 2, the pile foundation hole protection cover is a conical tube, which is provided with a small diameter opening end and a large diameter opening end from top to bottom, and the pipe mouth of the catheter is passed through the large diameter opening end and the small diameter opening end.

[0017] Optionally, prior to step three, the conduit is vibrated to achieve resonance.

[0018] Optionally, before step three, the concrete in the conduit is inflated and pressurized by a pressurizing device.

[0019] Optionally, the pressurizing device is an air compressor.

[0020] Optionally, in step three, the drill bit is provided with a plurality of grouting ports spaced apart along its circumference.

[0021] Optionally, in step 4, high-strength cement slurry is used as the cement slurry.

[0022] Optionally, in step seven, when the workability of the concrete in the conduit meets the workability index, the spraying of cement slurry into the conduit is stopped; if the workability of the concrete in the conduit does not meet the workability index, the spraying of cement slurry into the conduit is continued.

[0023] Optionally, during the underwater cast-in-place pile construction process, the guide tube is buried in the concrete to a depth of 2 to 6 m.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a method for treating pipe blockage of underwater cast-in-place piles. First, the fixing bracket of the conduit is strengthened, so as to improve the stability of the conduit during the construction process and reduce the shaking or displacement of the conduit to affect the subsequent operation. Then, the pile foundation orifice protective cover is installed on the conduit to protect the conduit from the influence of external debris and prevent the debris from entering the conduit. Then, the drill bit of the long spiral drill is extended into the conduit to ensure the accuracy of the drill bit drilling. When the drill bit is drilling in the conduit, cement slurry is sprayed to the inner wall of the conduit through the drill bit. Through the high pressure of the cement slurry, the concrete on the inner wall of the conduit falls off to ensure the smooth flow of the conduit. Then, the drill bit is reversed to stir the cement slurry and concrete in the conduit, so that the cement slurry and concrete can be fully mixed, the workability of the concrete can be improved, and it is beneficial to improve the quality of the pile body. Then, the drill bit is lifted so as to perform a slump test on the concrete in the conduit to meet the workability index, ensure that the concrete has good fluidity and plasticity, and thus reduce the risk of pipe blockage. Through the above-mentioned arrangement, the method for treating pipe blockage of underwater cast-in-place piles of the present application can effectively solve the problem of concrete pipe blockage and improve the quality of the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of a method for processing underwater bored pile pipe blockage provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a drill bit provided by an embodiment of the present invention drilling into a conduit;

[0028] Figure 3 It is a schematic diagram of a pile foundation hole protection cover provided in an embodiment of the present invention.

[0029] In the figure:

[0030] 10. Conduit; 20. Pile foundation hole protection cover; 201. Small diameter opening end; 202. Large diameter opening end; 30. Long spiral drill; 31. Drill bit; 311. Spraying port. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] like Figure 2 As shown, at present, there are many reasons for pipe blockage in bridge pile foundation construction, and the common reasons are:

[0036] 1. Unreasonable concrete mix ratio: If the slump of concrete does not meet the requirements, it may cause concrete caking and segregation, which in turn causes pipe blockage; 2. Poor workability of concrete: If the concrete is not fully mixed or is mixed unevenly, it will lead to poor workability of concrete, water seepage and segregation, which will cause pipe blockage; 3. Too long pouring time: If the underwater concrete pouring time is too long, or the pouring operation is interrupted for too long, the surface concrete will initially solidify and lose fluidity, making the pile body concrete unable to turn over, which will also cause pipe blockage; 4. Leakage of conduit 10: Leakage at the connection of conduit 10 reduces the workability of the concrete in conduit 10 and makes it lose fluidity.

[0037] Therefore, there is an urgent need for a method for treating underwater cast-in-place pile pipe blockage to solve the problem of concrete pipe blockage and avoid pile body defects or even broken piles caused by concrete pipe blockage.

[0038] like Figure 1-Figure 3 As shown, this embodiment provides a method for treating underwater bored pile pipe blockage, which comprises the following steps:

[0039] Step 1: Strengthen the fixing bracket of the catheter 10.

[0040] In the above step one, the fixing bracket is made of steel, wood or other high-strength materials to form a tripod or a quadrilateral frame for supporting and fixing the conduit 10 to improve the stability of the conduit 10 during the construction process, thereby preventing the conduit 10 from shaking or shifting during the construction process.

[0041] Before step one, the following steps are also included: the long spiral drill 30 is positioned so that the drill bit 31 is aligned with the center of the pile position to ensure that the long spiral drill 30 is accurately positioned before construction, thereby improving the accuracy and efficiency of subsequent construction steps.

[0042] Step 2: Install the pile foundation hole protection cover 20 on the guide tube 10.

[0043] Specifically, in the above step 2, the pile foundation hole protection cover 20 is a conical cylinder, which is sleeved on the conduit 10, so that the conical cylinder can fit tightly on the outer peripheral wall of the conduit 10 and prevent external debris from entering the conduit 10. The conical cylinder is provided with a small diameter opening end 201 and a large diameter opening end 202 from top to bottom, and the pipe mouth of the conduit 10 is penetrated by the large diameter opening end 202 through the small diameter opening end 201, which is not only convenient for installing and disassembling the conical cylinder, but also can effectively prevent debris such as mud, gravel and stone from entering the conduit 10, and prevent these debris from mixing with concrete to cause pipe blockage.

[0044] Step 3: insert the drill bit 31 of the long spiral drill 30 into the conduit 10 .

[0045] Specifically, in the above step 3, the drill bit 31 is provided with a plurality of grouting ports 311 at intervals along its circumference, so that during the drilling process of the drill bit 31, cement slurry can be uniformly sprayed onto the inner wall of the conduit 10 and the concrete, which helps to remove the concrete residue attached to the inner wall of the conduit 10 and keep the conduit 10 unobstructed. It should be noted that during the drilling process of the drill bit 31, the operator needs to pay attention to the drilling condition of the drill bit 31 and the flow state of the concrete, so as to adjust the construction parameters in time.

[0046] Specifically, before step three, the following steps are also included: vibrating the conduit 10 to achieve resonance, which helps to reduce the friction between the concrete and the inner wall of the conduit 10, thereby unblocking the conduit 10. Among them, the operator can vibrate the conduit 10 by a vibrating hammer or a plug-in vibrator, which will not be explained in detail here. And / or, the concrete in the conduit 10 is inflated and pressurized by a pressure device. On the one hand, the fluidity and plasticity of the concrete can be improved, and on the other hand, the concrete blocked in the conduit 10 can be impacted and destroyed by high-pressure gas, thereby unblocking the blocked pipe. Among them, the pressure device uses an air compressor or a jet valve and other devices, and the specific structure of the pressure device is not limited too much here.

[0047] Step 4: When the drill bit 31 is drilling in the conduit 10 , cement slurry is sprayed toward the inner wall of the conduit 10 by the drill bit 31 , so as to effectively remove the concrete residues attached to the inner wall of the conduit 10 and ensure that the conduit 10 is unobstructed.

[0048] Specifically, in the above step 4, high-strength cement slurry is selected as the cement slurry, which can improve the strength and durability of concrete, thereby improving the overall quality of the pile body.

[0049] Step 5: The drill bit 31 is reversed to stir the cement slurry and concrete in the conduit 10. The cement slurry and concrete in the conduit 10 can be fully stirred to make the mixture more uniform, thereby improving the workability of the concrete and facilitating the improvement of the pile body quality.

[0050] Step 6: lifting the drill bit 31 to provide working space for the subsequent concrete slump test and the subsequent cement slurry injection.

[0051] Step 7: Perform a slump test on the concrete in the conduit 10 to meet the workability index, which can detect the workability of the concrete and ensure that the concrete has good fluidity and plasticity, thereby meeting the construction requirements.

[0052] Specifically, in the above step seven, when the workability of the concrete in the conduit 10 meets the workability index, stop spraying cement slurry into the conduit 10. If the workability of the concrete in the conduit 10 does not meet the workability index, continue to spray cement slurry into the conduit 10. By flexibly adjusting the spraying amount and frequency of the cement slurry, it is ensured that the workability of the concrete meets the workability index, thereby ensuring that the quality of the concrete in the conduit 10 meets the design requirements, thereby improving the stability and bearing capacity of the pile body.

[0053] Specifically, during the underwater bored pile construction, the guide tube 10 is buried in the concrete at a depth of 2 to 6 m, which can ensure the quality of the pile and avoid the problem of the guide tube 10 being pulled out or leaking due to too shallow a burial depth, and the difficulty of pulling out the guide tube due to too deep a burial depth.

[0054] It should be noted that the present embodiment provides a method for treating underwater bored pile pipe blockage. First, the fixing bracket of the conduit 10 is strengthened, which can improve the stability of the conduit 10 during the construction process and reduce the shaking or displacement of the conduit 10 and affect the subsequent operation. Then the pile foundation hole protection cover 20 is installed on the conduit 10, thereby protecting the conduit 10 from external debris and preventing debris from entering the conduit 10. After that, the drill bit 31 of the long spiral drill 30 is extended into the conduit 10 to ensure the accuracy of the drill bit 31 drilling. When the drill bit 31 is drilling in the conduit 10, cement slurry is sprayed to the inner wall of the conduit 10 through the drill bit 31. Through the high pressure of the cement slurry, the concrete on the inner wall of the conduit 10 falls off, ensuring the smooth flow of the conduit 10. Then the drill bit 31 is reversed to stir the cement slurry and concrete in the conduit 10, so that the cement slurry and concrete can be fully mixed, the workability of the concrete is improved, and it is beneficial to improve the quality of the pile body. Afterwards, the drill bit 31 is lifted to perform a slump test on the concrete in the conduit 10 to meet the workability index, ensuring that the concrete has good fluidity and plasticity, thereby reducing the risk of pipe blockage. Through the above arrangement, the method for treating pipe blockage of underwater cast-in-place piles in this embodiment can effectively solve the problem of concrete pipe blockage and improve the quality of the pile body.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A method for treating underwater bored pile pipe blockage, characterized in that: include: Step 1, strengthening the fixing bracket of the catheter (10); Step 2: Install the pile foundation hole protection cover (20) on the guide tube (10); Step 3: insert the drill bit (31) of the long spiral drill (30) into the conduit (10); Step 4: During the process of the drill bit (31) drilling into the conduit (10), cement slurry is sprayed onto the inner wall of the conduit (10) through the drill bit (31); Step 5: The drill bit (31) is reversed to stir the cement slurry and concrete in the conduit (10); Step 6: lifting the drill bit (31); Step 7: Conduct a slump test on the concrete in the conduit (10) to meet the workability index.

2. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: Before step 1, the long auger drill (30) is in place so that the drill bit (31) is aligned with the center of the pile position.

3. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: In step 2, the pile foundation hole protection cover (20) is a conical tube, and the conical tube is provided with a small diameter opening end (201) and a large diameter opening end (202) from top to bottom, and the pipe mouth of the catheter (10) is passed through the large diameter opening end (202) and the small diameter opening end (201).

4. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: Prior to step three, the conduit (10) is vibrated to achieve resonance.

5. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: Before step three, the concrete in the conduit (10) is inflated and pressurized by a pressurizing device.

6. The method for treating underwater bored pile pipe blockage according to claim 5, characterized in that: The pressurizing device uses an air compressor.

7. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: In step three, the drill bit (31) is provided with a plurality of grouting ports (311) at intervals along its circumference.

8. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: In step 4, high-strength cement slurry is used as the cement slurry.

9. The method for treating underwater bored pile pipe blockage according to claim 1, characterized in that: In step seven, when the workability of the concrete in the conduit (10) meets the workability index, the injection of cement slurry into the conduit (10) is stopped; if the workability of the concrete in the conduit (10) does not meet the workability index, the injection of cement slurry into the conduit (10) continues.

10. The method for treating underwater bored pile pipe blockage according to any one of claims 1 to 9, characterized in that: During the underwater cast-in-place pile construction process, the guide tube (10) is buried in the concrete to a depth of 2 to 6 m.

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