Monitoring Method for Cast-in-Place Pile Concrete Pouring

Abstract

The present invention discloses a monitoring method for the casting of cast-in-place pile concrete, including an upper pressure monitoring device, a lower pressure monitoring device, an alarm device, and a central processor; the lower pressure monitoring device is arranged at a position 2 m away from the concrete outlet of the concrete conduit, and the lower pressure monitoring device is used to monitor the pressure value P1 at a position 2 m away from the concrete outlet of the concrete conduit; the upper pressure monitoring device is arranged at a position 6 m away from the concrete outlet of the concrete conduit, and the upper pressure monitoring device is used to monitor the pressure value P2 at a position 6 m away from the concrete outlet of the concrete conduit; the alarm device is communicatively connected to the central processor, and the alarm device is controlled by the central processor to emit alarm signal I or alarm signal II or alarm signal III, and can monitor the embedded depth of the conduit inserted into the concrete, so as to control the quality of the underwater cast-in-place pile body and the over-pouring depth.

Description

Technical Field

[0001] The present invention relates to the field of cast-in-place pile construction, and particularly to a method for monitoring the concrete pouring of cast-in-place piles. Background Art

[0002] In the construction of underwater cast-in-place concrete piles, concrete is transported by a conduit for pouring. According to the specification requirements, the depth of the concrete pouring conduit should be buried 2m - 6m into the concrete. During the construction process, the depth of the concrete conduit buried in the concrete is often judged by the experience of construction workers, or selectively over-poured to avoid the concrete conduit being pulled out of the concrete surface. However, over-pouring often results in the conduit being difficult to pull out due to long-term inactivity, or the phenomenon that the excessive depth of the conduit buried affects the quality of the pile foundation concrete.

[0003] In the past, when controlling the over-pouring of concrete, due to the inability to timely obtain the pouring depth of concrete, phenomena such as excessive or insufficient over-pouring of the concrete conduit occurred. The traditional control method was to use a plumb bob and the length of the pulled-out conduit to calculate the buried depth in the conduit during the concrete pouring process. Therefore, during the construction of underwater cast-in-place concrete piles, how to control the specific depth of the conduit buried in the concrete has always been a key and difficult point in construction;

[0004] When the depth of the conduit inserted into the concrete is less than 0.5 - 0.6m, the cone of the concrete mixture will suddenly drop, local bulges will appear near the conduit, and the surface curve will have a sudden turn. This indicates that the concrete mixture does not flow under the surface concrete protective layer, but the pouring pressure pierces through the surface protective layer and flows on the surface of the already poured concrete mixture, which destroys the integrity and uniformity of the concrete. At this time, if the pipe is pulled out too much, it is extremely easy to cause the phenomenon of broken piles;

[0005] However, if the conduit is buried too deep, the concrete will not flow smoothly in the conduit, which is prone to causing pipe blockage accidents.

[0006] Therefore, to solve the above problems, a method for monitoring the concrete pouring of cast-in-place piles is needed, which can monitor the buried depth of the conduit inserted into the concrete to control the quality of the underwater cast-in-place pile body and the over-pouring depth. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a method for monitoring the concrete pouring of cast-in-place piles, which can monitor the buried depth of the conduit inserted into the concrete to control the quality of the underwater cast-in-place pile body.

[0008] The method for monitoring the concrete pouring of cast-in-place piles of the present invention includes an upper pressure monitoring device, a lower pressure monitoring device, an alarm device, and a central processing unit;

[0009] The lower pressure monitoring device is arranged at a position 2 m away from the concrete outlet of the concrete conduit, and the lower pressure monitoring device is used to monitor the pressure value P1 at a position 2 m away from the concrete outlet of the concrete conduit;

[0010] The upper pressure monitoring device is arranged at a position 6 m away from the concrete outlet of the concrete conduit, and the upper pressure monitoring device is used to monitor the pressure value P2 at a position 6 m away from the concrete outlet of the concrete conduit;

[0011] The alarm device is communicatively connected to the central processor, and the alarm device is controlled by the central processor to emit alarm signal I or alarm signal II or alarm signal III,

[0012] The upper pressure monitoring device is communicatively connected to the central processor, and the lower pressure monitoring device is communicatively connected to the central processor. The central processor is used to collect the pressure value P1 and the pressure value P2;

[0013] When both the upper pressure monitoring device and the lower pressure monitoring device are located in the pile hole, the pressure difference P3 is obtained, and P3 = P1 - P2;

[0014] When both the upper pressure monitoring device and the lower pressure monitoring device are located in the slurry in the pile hole, the pressure values monitored by the upper pressure monitoring device and the lower pressure monitoring device are the pressure values at their respective corresponding preset positions in the slurry. In this state, P3 差1 = 4ρ 泥浆 g;

[0015] When both the upper pressure monitoring device and the lower pressure monitoring device are located in the concrete in the pile hole, the pressure values monitored by the upper pressure monitoring device and the lower pressure monitoring device are the pressure values at their respective corresponding preset positions in the concrete. In this state, P3 差2 = 4ρ 混凝土 g;

[0016] When the upper pressure monitoring device is located in the slurry in the pile hole and the lower pressure monitoring device is located in the concrete in the pile hole, the pressure value monitored by the upper pressure monitoring device is the pressure value at the corresponding preset position in the slurry, and the pressure value monitored by the lower pressure monitoring device is the pressure value at the corresponding preset position in the concrete. In this state, P3 差1 < P3 差3 < P3 差2 ;

[0017] The central processor controls the position of the concrete outlet through the data of the P3 value;

[0018] If P3 = P3 差1 , the alarm device is controlled by the central processor to emit alarm signal I. In this state, the concrete discharging rate is maintained, and at the same time, the preset lifting speed of the concrete conduit is reduced, or the preset lifting speed of the concrete conduit is maintained, and at the same time, the concrete discharging rate is increased;

[0019] If P3 = P3 差2 , the alarm device is controlled by the central processing unit to emit an alarm signal II. In this state, the concrete discharging rate is maintained while the preset lifting speed of the concrete conduit is increased; or the preset lifting speed of the concrete conduit is maintained while the concrete discharging rate is decreased;

[0020] If P3 差1 < P3 = P3 差3 < P3 差2 , the alarm device does not emit an alarm signal. In this state, the concrete discharging rate is maintained while the preset lifting speed of the concrete conduit is maintained;

[0021] If P3 ≠ P3 差1 ≠ P3 差2 ≠ P3 差3 , the alarm device is controlled by the central processing unit to emit an alarm signal III. In this state, the concrete discharging is terminated;

[0022] It further includes the following construction steps:

[0023] S1. Connect the upper pressure monitoring device, the lower pressure monitoring device, the alarm device and their respective corresponding communication connections with the central processing unit;

[0024] Pre-calculate the set value of P3 差1 so that the central processing unit records and associates it with the alarm signal I and the alarm signal III. Pre-calculate the set value of P3 差2 so that the central processing unit records and associates it with the alarm signal II and the alarm signal III. Pre-calculate the set value range of P3 差3 so that the central processing unit records and associates it with the alarm signal III;

[0025] S2. Install the upper pressure monitoring device and the lower pressure monitoring device at their respective corresponding positions on the concrete conduit;

[0026] S3. Place the concrete conduit into the pile hole, adjust the concrete discharging rate and the preset lifting speed of the concrete conduit so that P3 差1 < P3 = P3 差3 < P3 差2 , and gradually remove the concrete conduit;

[0027] S4. When pouring to the remaining one section of the concrete conduit from the pile top elevation, pause the concrete discharging, calculate the value of P 预设超灌压力值 , after determining the value of P 预设超灌压力值 , continue the concrete discharging. When the pressure value P2 of the lower pressure monitoring device 终 = P 预设超灌压力值 , terminate the concrete discharging to complete the pouring of the cast-in-place pile concrete;

[0028] Or, pre-calculate P 预设超灌压力值Value, continuously discharging concrete, the pressure value P2 of the downward pressure monitoring device 终 = P 预设超灌压力值 When it does, terminate the concrete discharge and complete the pouring of the cast-in-place pile concrete;

[0029] P 预设超灌压力值 = ρ 混凝土 g(h1 + h2)+ ρ 泥浆 g(h3 - h2),

[0030] ρ 混凝土 : Concrete density kg / m 3 ,

[0031] ρ 泥浆 : Mud density kg / m 3 ,

[0032] g: The ratio of the gravitational force of an object to its mass, approximately equal to 9.8 N / kg,

[0033] h1: The height from the downward pressure monitoring device to the pile top elevation m,

[0034] h2: Preset concrete over-pouring height m,

[0035] h3: Dry drilling depth m.

[0036] Furthermore, the upward pressure monitoring device and the downward pressure monitoring device are detachably assembled at the corresponding positions preset on the concrete conduit through their respective corresponding steel grid cages.

[0037] Furthermore, the steel grid cage has a pick-and-place opening that can be controlled to open and close.

[0038] Furthermore, the upward pressure monitoring device is connected to the central processor through wire Ⅰ, and the downward pressure monitoring device is connected to the central processor through wire Ⅱ;

[0039] A wire fixing member for limiting wire Ⅰ and / or wire Ⅱ is provided on the concrete conduit.

[0040] Furthermore, the wire fixing member includes a bottom plate, a left guard plate, and a right guard plate, and the left guard plate and the right guard plate are respectively arranged at the front end and the rear end of the top surface of the bottom plate;

[0041] A front limiting hole is formed between the left guard plate and the top surface of the bottom plate, a rear limiting hole is formed between the right guard plate and the top surface of the bottom plate, a right limiting opening is provided on the right side of the front limiting hole, and a left limiting opening is provided on the left side of the rear limiting hole.

[0042] Furthermore, the wire fixing member further includes a guide plate provided on the top surface of the bottom plate, and the guide plate is located between the front limiting hole and the rear limiting hole.

[0043] Further, the guiding plate includes a left guiding plate and a right guiding plate, and the left guiding plate and the right guiding plate are arranged opposite to each other in the transverse direction.

[0044] The beneficial effects of the present invention are as follows: A monitoring method for concrete pouring of cast-in-place piles disclosed by the present invention monitors the concrete during the construction process of underwater cast-in-place concrete piles, maintains continuous and stable pouring of the cast-in-place pile concrete by controlling the lifting speed of the concrete conduit, improves the construction quality. The present invention uses intelligent equipment to monitor the concrete pouring during the construction process of underwater cast-in-place concrete piles, transmits information to the alarm device by setting alarm values through the central processing unit, actively reminds construction workers of the construction state at the construction site, indirectly guides the workers in construction, standardizes the construction process of underwater cast-in-place concrete piles, ensures the control range of the concrete conduit pouring during the concrete pouring process, effectively improves the construction quality of underwater cast-in-place concrete piles, and at the same time controls the over-pouring height of the concrete when the pouring is completed, saves costs, and standardizes the construction process. Description of the Drawings

[0045] The present invention will be further described below in conjunction with the drawings and embodiments:

[0046] Figure 1 It is a schematic structural diagram before the concrete pouring of the cast-in-place pile of the present invention;

[0047] Figure 2 It is a schematic structural diagram during the concrete pouring of the cast-in-place pile of the present invention;

[0048] Figure 3 It is a schematic structural diagram of the final section of the concrete pouring of the cast-in-place pile of the present invention;

[0049] Figure 4 It is a schematic structural diagram of the wire fixing member of the present invention. Detailed Embodiments

[0050] Figure 1 It is a schematic structural diagram of the present invention. As shown in the figure, the monitoring method for concrete pouring of the cast-in-place pile in this embodiment includes an upper pressure monitoring device 1, a lower pressure monitoring device 2, an alarm device, and a central processing unit 3;

[0051] In this solution, the upper pressure monitoring device 1 and the lower pressure monitoring device 2 select any one of the pressure sensors of the same model in the existing technology, the alarm device and the central processor 3 respectively select any one in the existing technology. During use, the upper pressure monitoring device 1, the lower pressure monitoring device 2 and the alarm device are respectively communicatively connected to the central processor 3 corresponding to each of them, and the central processor 3 records the preset data of the upper pressure monitoring device 1 and the lower pressure monitoring device 2, and associates the preset data of the upper pressure monitoring device 1 and the lower pressure monitoring device 2 with the alarm device to implement the determination alarm in the following construction method, indicate the construction at the cast-in-place pile concrete pouring site, and improve the construction quality. The central processor 3 is communicatively connected to the pouring equipment to control the concrete output rate and the preset lifting speed of the concrete conduit 4, and at the same time control the opening and closing of the concrete outlet to realize the fully automatic construction of the concrete 6 cast-in-place pile, or monitor the construction manually and control the construction of the concrete 6 cast-in-place pile through different alarm signals. When constructing manually, the value of P 预设超灌压力值 is also associated with the alarm device by the central processor 3 to send out alarm signal Ⅳ to prompt the construction personnel that the cast-in-place pile construction is completed and close the concrete outlet;

[0052] The lower pressure monitoring device 2 is arranged at a position 2 m away from the concrete outlet of the concrete conduit 4, and the lower pressure monitoring device 2 is used to monitor the pressure value P1 at a position 2 m away from the concrete outlet of the concrete conduit 4;

[0053] The upper pressure monitoring device 1 is arranged at a position 6 m away from the concrete outlet of the concrete conduit 4, and the upper pressure monitoring device 1 is used to monitor the pressure value P2 at a position 6 m away from the concrete outlet of the concrete conduit 4;

[0054] The alarm device is communicatively connected to the central processor 3, and the alarm device is controlled by the central processor 3 to send out alarm signal Ⅰ or alarm signal Ⅱ or alarm signal Ⅲ,

[0055] The upper pressure monitoring device 1 is communicatively connected to the central processor 3, the lower pressure monitoring device 2 is communicatively connected to the central processor 3, and the central processor 3 is used to collect the pressure value P1 and the pressure value P2;

[0056] When both the upper pressure monitoring device 1 and the lower pressure monitoring device 2 are located in the pile hole, the central processor 3 obtains the pressure difference P3, P3 = P1 - P2;

[0057] When both the upper pressure monitoring device 1 and the lower pressure monitoring device 2 are located in the slurry 5 in the pile hole, the pressure values monitored by the upper pressure monitoring device 1 and the lower pressure monitoring device 2 are both the pressure values at their respective corresponding preset positions in the slurry 5. In this state, P3 差1 = 4ρ 泥浆5 g;

[0058] When both the upper pressure monitoring device 1 and the lower pressure monitoring device 2 are located in the concrete 6 within the pile hole, the pressure values monitored by the upper pressure monitoring device 1 and the lower pressure monitoring device 2 are respectively the pressure values at their corresponding preset positions in the concrete 6. In this state, P3 差2 = 4ρ 混凝土6 g;

[0059] When the upper pressure monitoring device 1 is located in the slurry 5 within the pile hole and the lower pressure monitoring device 2 is located in the concrete 6 within the pile hole, the pressure value monitored by the upper pressure monitoring device 1 is the pressure value at the corresponding preset position in the slurry 5, and the pressure value monitored by the lower pressure monitoring device 2 is the pressure value at the corresponding preset position in the concrete 6. In this state, P3 差1 < P3 差3 < P3 差2 ;

[0060] The central processing unit 3 controls the position of the concrete outlet in the pile through the data of the P3 value;

[0061] If P3 = P3 差1 , the alarm device is controlled by the central processing unit 3 to emit alarm signal I. In this state, maintain the concrete discharging rate, and at the same time reduce the preset lifting speed of the concrete conduit 4, or maintain the preset lifting speed of the concrete conduit 4, and at the same time increase the concrete discharging rate;

[0062] If P3 = P3 差2 , the alarm device is controlled by the central processing unit 3 to emit alarm signal II. In this state, maintain the concrete discharging rate, and at the same time increase the preset lifting speed of the concrete conduit 4; or maintain the preset lifting speed of the concrete conduit 4, and at the same time reduce the concrete discharging rate;

[0063] If P3 差1 < P3 = P3 差3 < P3 差2 , the alarm device does not emit an alarm signal. In this state, maintain the concrete discharging rate, and at the same time maintain the preset lifting speed of the concrete conduit 4;

[0064] If P3 ≠ P3 差1 ≠ P3 差2 ≠ P3 差3 , the alarm device is controlled by the central processing unit 3 to emit alarm signal III. In this state, terminate the concrete discharging;

[0065] During the construction process of this solution, to ensure the continuity of construction and continuously maintain the concrete output rate, the continuous and stable pouring of the cast-in-place pile concrete is maintained by controlling the lifting speed of the concrete conduit 4, improving the construction quality. And the construction is monitored manually throughout the process. The concrete output rate is adjusted through the alarm signal, the lifting speed of the concrete conduit 4 is controlled, and the opening and closing of the concrete outlet are controlled. The alarm device and the central processor form an integrated assembly. The present invention uses intelligent equipment to monitor the concrete pouring during the construction of the underwater concrete 6 cast-in-place pile. The alarm value is set through the central processor 3 and the information is transmitted to the alarm device, actively reminding the construction workers of the construction status at the construction site, indirectly guiding the workers in construction, standardizing the construction process of the underwater concrete 6 cast-in-place pile, ensuring the control range of the concrete conduit 4 during the concrete pouring process, effectively improving the construction quality of the underwater concrete 6 cast-in-place pile. At the same time, the over-pouring height of the concrete 6 is controlled when the pouring is completed, saving costs and standardizing the construction process.

[0066] It also includes the following construction steps:

[0067] S1. Connect the upper pressure monitoring device 1, the lower pressure monitoring device 2, the alarm device and their respective corresponding communication connections with the central processor 3;

[0068] Pre-calculate the set value of P3 差1 so that the central processor 3 records and associates it with alarm signal I and alarm signal III. Pre-calculate the set value of P3 差2 so that the central processor 3 records and associates it with alarm signal II and alarm signal III. Pre-calculate the set value of P3 差3 The range of the set value so that the central processor 3 records and associates it with alarm signal III;

[0069] The specific gravity of the on-site mud 5 is generally 1.2 - 1.3, and the specific gravity of the concrete 6 is generally 2.36 - 2.4, which needs to be determined according to the actual situation after measurement. If there are no determining conditions, the above parameters can be referred to, and no further elaboration will be made here;

[0070] S2. Install the upper pressure monitoring device 1 and the lower pressure monitoring device 2 at their respective corresponding positions on the concrete conduit 4;

[0071] S3. Place the concrete conduit 4 into the pile hole, adjust the concrete output rate and the preset lifting speed of the concrete conduit 4 so that P3 差1 <P3 = P3 差3 <P3 差2 , as the construction height of the concrete 6 cast-in-place pile gradually increases, the concrete conduit 4 is removed step by step; the removal order is to remove it step by step from top to bottom;

[0072] S4. When pouring to the remaining one section of the concrete conduit 4 from the pile top elevation, suspend the concrete output, calculate the value of P 预设超灌压力值 and determine P预设超灌压力值 After the value, continue to discharge concrete, and the pressure value P2 of the downward pressure monitoring device 2 终 = P 预设超灌压力值 When it is, terminate the concrete discharge and complete the casting of the cast-in-place pile concrete;

[0073] Or, pre-calculate P 预设超灌压力值 value, continuously discharge concrete, and the pressure value P2 of the downward pressure monitoring device 2 终 = P 预设超灌压力值 When it is, terminate the concrete discharge and complete the casting of the cast-in-place pile concrete;

[0074] This scheme adopts the second method, pre-calculate P 预设超灌压力值 value for the central processing unit 3 to record, ensuring the continuity and construction quality of the concrete 6 cast-in-place pile;

[0075] P 预设超灌压力值 = ρ 混凝土6 g(h1 + h2)+ ρ 泥浆5 g(h3 - h2),

[0076] ρ 混凝土6 : Concrete density kg / m 3 ,

[0077] ρ 泥浆5 : Mud density kg / m 3 ,

[0078] g: The ratio of the gravitational force to the mass of an object, approximately equal to 9.8 N / kg,

[0079] h1: The height from the downward pressure monitoring device to the pile top elevation m,

[0080] h2: Preset concrete overpour height m,

[0081] h3: Dry drilling depth m.

[0082] In this embodiment, the upward pressure monitoring device 1 and the downward pressure monitoring device 2 are detachably assembled at the corresponding preset positions of the concrete conduit 4 through their respective corresponding steel grid cages; the steel grid cage has a pick-and-place opening that can be controlled to open and close. The steel grid cage has a number of slurry inlet holes to ensure that the slurry can overflow into the container and contact the pressure sensor to achieve the pressure measurement effect, so that the pressure at the preset position in the pile can be transmitted to the upward pressure monitoring device 1 and the downward pressure monitoring device 2 without error, improving the monitoring quality. The steel grid cage is detachably assembled on the concrete conduit 4, and the arrangement of the pick-and-place opening is also conducive to the removal of the upward pressure monitoring device 1 and the downward pressure monitoring device 2 on the concrete conduit 4.

[0083] In this embodiment, the upper pressure monitoring device 1 is connected to the central processor 3 via a wire I, and the lower pressure monitoring device 2 is connected to the central processor 3 via a wire II; a wire fixing member for limiting the position of the wire I and / or the wire II is provided on the concrete conduit 4;

[0084] As shown in the figure, the wire fixing member includes a bottom plate 71, a left guard plate 72 and a right guard plate 73, and the left guard plate 72 and the right guard plate 73 are respectively arranged at the front end and the rear end of the top surface of the bottom plate 71; a front limiting hole is formed between the left guard plate 72 and the top surface of the bottom plate 71, and a rear limiting hole is formed between the right guard plate 73 and the top surface of the bottom plate 71, and the right side of the front limiting hole has a right limiting opening, and the left side of the rear limiting hole has a left limiting opening; the wire fixing member also includes a guide plate arranged on the top surface of the bottom plate 71, and the guide plate is located between the front limiting hole and the rear limiting hole; the guide plate includes a left guide plate 74 and a right guide plate 75, and the left guide plate 74 and the right guide plate 75 are arranged opposite to each other in the transverse direction; the wire is passed through the left limiting opening and the right limiting opening and is limited by the left guard plate 72, the right guard plate 73, the left guide plate 74 and the right guide plate 75, so as to improve the fastening effect and ensure the structural stability.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A monitoring method for cast-in-place pile concrete pouring, characterized in that: It includes an upper pressure monitoring device, a lower pressure monitoring device, an alarm device and a central processor; The lower pressure monitoring device is arranged at a position 2 m away from the concrete outlet of the concrete conduit. The lower pressure monitoring device is used to monitor the pressure value P1 at a position 2 m away from the concrete outlet of the concrete conduit; The upper pressure monitoring device is arranged at a position 6 m away from the concrete outlet of the concrete conduit. The upper pressure monitoring device is used to monitor the pressure value P2 at a position 6 m away from the concrete outlet of the concrete conduit; The alarm device is communicatively connected to the central processor. The alarm device is controlled by the central processor to emit alarm signal Ⅰ or alarm signal Ⅱ or alarm signal Ⅲ. The upper pressure monitoring device is communicatively connected to the central processor, and the lower pressure monitoring device is communicatively connected to the central processor. The central processor is used to collect the pressure value P1 and the pressure value P2; When both the upper pressure monitoring device and the lower pressure monitoring device are located in the pile hole, the pressure difference P3 is obtained, and P3 = P1 - P2; When both the upper pressure monitoring device and the lower pressure monitoring device are located in the mud within the pile hole, the pressure values monitored by the upper pressure monitoring device and the lower pressure monitoring device are respectively the pressure values at their corresponding preset positions in the mud. In this state, P3 差1 = 4ρ 泥浆 g; When both the upper pressure monitoring device and the lower pressure monitoring device are located in the concrete within the pile hole, the pressure values monitored by the upper pressure monitoring device and the lower pressure monitoring device are respectively the pressure values at their corresponding preset positions in the concrete. In this state, P3 差2 = 4ρ 混凝土 g; When the upper pressure monitoring device is in the mud in the pile hole and the lower pressure monitoring device is in the concrete in the pile hole, the pressure value monitored by the upper pressure monitoring device is the pressure value at the corresponding preset position in the mud, and the pressure value monitored by the lower pressure monitoring device is the pressure value at the corresponding preset position in the concrete. In this state, P3 差1 <P3 差3 <P3 差2 ; The central processor controls the position of the concrete outlet through the data of the P3 value; If P3 = P3 差1 , the alarm device is controlled by the central processing unit to emit an alarm signal I. In this state, the concrete discharging rate is maintained, and at the same time, the preset lifting speed of the concrete conduit is reduced, or the preset lifting speed of the concrete conduit is maintained, and at the same time, the concrete discharging rate is increased; If P3 = P3 差2 , the alarm device is controlled by the central processing unit to emit an alarm signal II. In this state, the concrete output rate is maintained while the preset lifting speed of the concrete conduit is increased; Or maintain the preset lifting speed of the concrete conduit and at the same time reduce the concrete discharging rate; If P3 差1 <P3 = P3 差3 <P3 差2 , the alarm device does not emit an alarm signal. In this state, the concrete discharging rate is maintained, and at the same time, the preset lifting speed of the concrete conduit is maintained; If P3 ≠ P3 差1 ≠ P3 差2 ≠ P3 差3 , the alarm device is controlled by the central processing unit to emit an alarm signal Ⅲ, and in this state, the concrete discharging is terminated; It also includes the following construction steps: S1. Make the upper pressure monitoring device, the lower pressure monitoring device and the alarm device respectively communicatively connected to the central processor; Pre-calculate P3 差1 The setting value of 差1 enables the central processing unit to record and associate with alarm signal I and alarm signal III, and pre-calculate P3 差2 The setting value of 差2 enables the central processing unit to record and associate with alarm signal II and alarm signal III, and pre-calculate P3 差3 The range of the setting value of 差3 enables the central processing unit to record and associate with alarm signal III; S2. Install the upper pressure monitoring device and the lower pressure monitoring device at their respective corresponding positions on the concrete conduit; S3. Place the concrete conduit into the pile hole, and adjust the concrete output rate and the preset lifting speed of the concrete conduit to make P3 差1 <P3 = P3 差3 <P3 差2 , and gradually remove the concrete conduit; S4. When pouring to the remaining one section of the concrete conduit from the pile top elevation, suspend the concrete discharge, calculate the value of P 预设超灌压力值 , determine the value of P 预设超灌压力值 . After that, continue the concrete discharge. When the pressure value P2 of the downward pressure monitoring device 终 = P 预设超灌压力值 , terminate the concrete discharge to complete the casting of the cast-in-place pile concrete; Alternatively, pre-calculate the value of P 预设超灌压力值 While continuously discharging concrete, the pressure value P2 of the downward pressure monitoring device 终 = P 预设超灌压力值 When this occurs, stop discharging concrete to complete the casting of the cast-in-place pile P 预设超灌压力值 = ρ 混凝土 g(h1 + h2)+ ρ 泥浆 g(h3 - h2), ρ 混凝土 : Concrete density kg / m 3 , ρ 泥浆 : Mud density kg / m 3 , g: The ratio of the object's gravity to its mass, approximately equal to 9.8 N / kg. h1: The height of the lower pressure monitoring device from the pile top elevation, in m. h2: The preset concrete over-pouring height, in m. h3: The depth of the empty drilling, in m.

2. The cast-in-place pile concrete pouring monitoring method according to claim 1, characterized in that: The upper pressure monitoring device and the lower pressure monitoring device are detachably assembled at the preset corresponding positions on the concrete conduit through their respective corresponding steel grid cages.

3. The cast-in-place pile concrete pouring monitoring method according to claim 2, wherein: The steel grid cage has a pick-up and placement opening that can be controlled to open and close.

4. The cast-in-place pile concrete pouring monitoring method according to claim 3, wherein: The upper pressure monitoring device is connected to the central processor through wire Ⅰ, and the lower pressure monitoring device is connected to the central processor through wire Ⅱ; On the concrete conduit, there are wire fixing parts for limiting wire Ⅰ and / or wire Ⅱ.

5. The cast-in-place pile concrete pouring monitoring method according to claim 4, characterized in that: The wire fixing part includes a bottom plate, a left guard plate and a right guard plate. The left guard plate and the right guard plate are respectively arranged at the front end and the rear end of the top surface of the bottom plate; A front limiting hole is formed between the left guard plate and the top surface of the bottom plate, and a rear limiting hole is formed between the right guard plate and the top surface of the bottom plate. There is a right limiting opening on the right side of the front limiting hole, and a left limiting opening on the left side of the rear limiting hole.

6. The monitoring method for cast-in-place pile concrete pouring according to claim 5, characterized in that: The wire fixing part further includes a guiding plate arranged on the top surface of the bottom plate. The guiding plate is located between the front limiting hole and the rear limiting hole.

7. The monitoring method for cast-in-place pile concrete pouring according to claim 6, wherein: The guiding plate includes a left guiding plate and a right guiding plate. The left guiding plate and the right guiding plate are arranged opposite to each other in the transverse direction.

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