Device and method for monitoring settlement and displacement of prestressed steel cylinder concrete pipe based on multi-source data fusion

Abstract

The application discloses a device for monitoring settlement and dislocation of prestressed steel cylinder concrete pipe based on multi-source data fusion, which comprises a static level gauge and a displacement meter. The static level gauge is installed in a static level gauge protector, and the protector comprises a lower protective box, an upper protective cover, a pressing rod and four springs, so as to ensure the stability and safety of the static level gauge. The displacement meter is fixed in a displacement meter fixing part at the socket end, and the other end of the displacement meter is in contact with an L-shaped baffle. Flexible protection devices are installed outside the displacement meter and the L-shaped baffle, which are composed of an inner protective layer, an outer protective shell and connecting springs. On the basis of ensuring normal work of the displacement meter, the pipeline retains the original joint characteristics and can freely adapt to uneven settlement and deformation of the foundation. The monitoring data of the static level gauge and the displacement meter are fully utilized, and the data fusion algorithm is combined to distinguish the relative settlement and dislocation value of the pipeline, so that the data is more comprehensive and the calculation result is more reasonable.

Description

TECHNICAL FIELD

[0001] The application relates to a device for monitoring settlement and dislocation of a prestressed steel cylinder concrete pipe based on multi-source data fusion and a monitoring method, and belongs to the field of pipeline monitoring. BACKGROUND

[0002] A prestressed concrete cylinder pipe (PCCP) is a composite multipurpose pipe material, which has been widely used in the construction of various long-distance water diversion projects. Traditional PCCP structures can be divided into inner lining type and embedded type. The inner lining type PCCP is composed of a steel cylinder and a concrete lining, and a circumferential prestressed steel wire is wound outside the steel cylinder, and then a cement mortar protective layer is made. The embedded type PCCP is composed of a steel cylinder and a concrete layer on the inner and outer sides of the steel cylinder, and a prestressed steel wire is wound outside the core concrete, and then a cement mortar protective layer is made. The prestressed steel wire can produce uniform initial pre-pressure on the concrete of the pipe core, so that the pipeline can resist the tensile stress generated by the internal water pressure. Adjacent PCCP pipelines are spliced through socket type joints, and flexible mortar is used for backfill grouting of the joints. Therefore, the PCCP pipeline joint has a certain flexibility and can adapt to a certain degree of uneven settlement and deformation of the foundation.

[0003] Related research shows that under the action of vertical load, the damage process of the socket type water supply pipeline interface generally shows that: the pipeline interface first produces a certain vertical deformation and bending angle under the action of vertical load. If the sealing ring of the interface cannot meet the requirements of vertical deformation and bending angle, pipeline interface leakage will occur. With the continuous increase of vertical deformation, the pipeline interface leakage will become leakage. If the pipeline leakage is not detected in time, the water flow leaked out will continuously erode the soil under the pipeline, so that a cavity is formed under the pipeline. At this time, the pipeline and its interface part will become a simply supported beam, causing interface damage, and even causing major accidents such as pipe explosion and ground collapse.

[0004] To ensure the safe operation of the PCCP pipeline, real-time monitoring of the relative settlement and dislocation values of the pipeline joint is of great significance for real-time diagnosis and evaluation of the health status of the PCCP pipeline structure. Therefore, it is currently necessary to consider optimizing the design of the traditional PCCP structure to have the superior performance of being able to judge the relative settlement and dislocation of the pipeline joint. SUMMARY

[0005] The application aims to overcome the defects in the prior art and provide a device and a monitoring method for monitoring the settlement and displacement of a prestressed steel cylinder concrete pipe based on multi-source data fusion.

[0006] The device for monitoring the settlement and displacement of a prestressed steel cylinder concrete pipe based on multi-source data fusion comprises a static level gauge installed on the top of a pipe in the middle section of the pipe and a displacement meter arranged in the pipe socket section, a protective member is arranged on the static level gauge, the protective member comprises an upper protective cover, a center pressing rod, four springs, a lower protective box and a pressing plate, the static level gauge is installed in the lower protective box, the lower protective box is fixedly installed on the concrete pipe, a through hole is arranged on the top of the lower protective box, the pressing plate is installed on the upper surface of the static level gauge, the center pressing rod passes through the through hole on the top of the lower protective box and is connected with the pressing plate, the upper protective cover is fixedly installed above the lower protective box, the four springs are located in the upper protective cover, the center pressing rod is pressed by the pulling force of the four springs, and the pressing plate is tightly attached to the static level gauge.

[0007] As preferred, seven displacement meters are arranged at the socket section of the pipe with a diameter of 3m or above, five displacement meters are arranged at the socket section of the pipe with a diameter of 2-3m, and four displacement meters are arranged at the socket section of the pipe with a diameter of less than 2m, and at least two displacement meters are arranged at the lower side of the pipe and cannot be arranged at the pipe bottom. A high-precision static level gauge is arranged at the upper side of the pipe top at the middle section of the pipe, and one is arranged at each section of the pipe in general. The high-precision displacement meter is arranged at the socket section of the pipe.

[0008] As preferred, the prestressed steel cylinder concrete pipe is prepared by the following steps:

[0009] S1, a socket steel ring, a spigot steel ring and a steel cylinder for connecting the pipe joint are prepared, and the socket steel ring and the spigot steel ring are welded to the two ends of the steel cylinder;

[0010] S2, a bolt connecting piece, a static level gauge protection piece, a displacement meter fixing piece, a displacement meter L-shaped baffle and a displacement meter flexible protection device are respectively prepared. These devices should be made of materials with functions of waterproof, moisture-proof, corrosion-proof and the like, so as to ensure that the sensor can work normally within the specified service life;

[0011] S3, the bolt connecting piece is embedded in the formwork at the specified position where the static level gauge and the displacement meter are installed, and the pipe core concrete is poured;

[0012] S4, the pipe core after curing is erected on a rotating table, and the prestressed steel wire is wound;

[0013] S5, a roller sand mortar protective layer is radiated;

[0014] S6, an epoxy coal tar anticorrosion coating is radiated.

[0015] A monitoring method of the device for monitoring the settlement and displacement of the prestressed steel cylinder concrete pipe based on multi-source data fusion as described above, comprising the following steps:

[0016] (a) the pipe is hoisted to the site installation and positioning, the static level gauge is installed at the specified position, the static level gauge protection piece is installed outside the static level gauge, the static level gauge protection piece is fixed by using the fixing bolt, the L-shaped baffle of the displacement meter and the displacement meter fixing piece are installed at the socket end and the spigot end of the pipe respectively, the displacement meter is fixed in the displacement meter fixing piece and the bolt is tightened after the installation is completed, and then the displacement meter flexible protection device is installed;

[0017] (b) the actual joint settlement and displacement value is decomposed into four displacement components: horizontal deflection θ, vertical deflection φ, axial translation Δz and vertical translation Δy;

[0018] (c) According to the position and number of the static level gauge and displacement meter, the changes in the readings of the static level gauge and displacement meter caused by the four displacement components are derived respectively by using rigid body displacement and other related theories;

[0019] (d) Considering the combined action of the four displacement components, the theoretical readings of each sensor are calculated according to the superposition principle, and the following mathematical model is established to solve the relative settlement and displacement value of the pipeline:

[0020]

[0021] In the formula, M is the theoretical value of the sensor reading at the position, and M is the actual monitoring value. i n is the number of sensors, and the theoretical value of the sensor reading and the monitoring value often have a certain deviation in actual monitoring, so the above optimization model is established by comprehensively considering the influence of all sensors to solve the settlement and displacement value that meets the minimum deviation between the theoretical value and the monitoring value of all sensors, and the corresponding horizontal deflection θ, vertical deflection and axial translation Δz and vertical translation Δy values are obtained. According to the comparison of θ,

[0022] Advantages: Compared with the prior art, the present application has the following advantages:

[0023] (1) The present application provides a new PCCP pipe based on multi-source data fusion monitoring settlement and displacement and a manufacturing method thereof, by designing corresponding sensor protection parts and fixing parts to fix and protect the static level, displacement meter and other sensors, which is more firm and reliable than the method of directly pasting sensors on the outer wall of the pipeline, and the external sensor protection parts, fixing parts and the like are made of materials with waterproof, moisture-proof, corrosion-resistant and the like, which can maximize the normal work of the sensors within the specified service life.

[0024] (2) The present application provides a new PCCP pipe based on multi-source data fusion monitoring settlement and displacement and a manufacturing method thereof, which is simple in process, only needs to increase the production and installation steps of corresponding sensor protection parts and fixing parts on the traditional PCCP structure production line, and does not cause too much influence on the existing PCCP production line.

[0025] (3) The new PCCP pipe based on multi-source data fusion monitoring settlement and its manufacturing method provided by the application adopts a flexible protection device for the displacement meter arranged on the pipe joint, compared with the traditional rigid protection device, the flexible protection device can not only make the displacement meter reading not be disturbed by the external soil, but also can ensure that the pipe joint retains the original joint characteristics after the displacement meter is installed, and can freely adapt to the uneven settlement and deformation of the foundation.

[0026] (4) The new PCCP pipe based on multi-source data fusion monitoring settlement and its manufacturing method provided by the application, by fully utilizing the data of the static level gauge in the middle part of the pipe section and the displacement meter of the pipe joint, the relative settlement and displacement value of the pipe is distinguished based on the data fusion algorithm, and the calculation result is more reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a production flow chart of the new prestressed steel cylinder concrete pipe based on multi-source data fusion monitoring settlement and displacement.

[0028] Figure 2 It is a structure diagram after pouring the core concrete.

[0029] Figure 3 It is a winding prestressed steel wire schematic diagram.

[0030] Figure 4 It is a structure schematic diagram of the static level gauge protection piece.

[0031] Figure 5 It is a cross-sectional view of the static level gauge and its protection piece along the pipe axial direction.

[0032] Figure 6 It is a structure schematic diagram of the displacement meter fixing piece and the displacement meter L-shaped baffle.

[0033] Figure 7 It is a structure schematic diagram of the displacement meter flexible protection device.

[0034] Figure 8 It is a cross-sectional view of the displacement meter flexible protection device along the pipe axial direction.

[0035] Figure 9 It is a sensor arrangement position schematic diagram of the first embodiment of the application.

[0036] Figure 10 It is a schematic diagram of the pipe alone relative horizontal deflection θ.

[0037] Figure 11 It is a schematic diagram of the pipe alone relative vertical deflection φ.

[0038] Figure 12 It is a schematic diagram of the pipe alone relative axial translation Δz.

[0039] Figure 13 Fig. 1 shows the schematic diagram of the relative axial translation Δy of the pipe alone.

[0040] In the figure: socket steel ring 1; pipe core concrete 2; bolt connecting piece embedded in the pipe core concrete 3; prestressed steel wire 4; stress generating device 5; upper side protective cover and center pressure rod 6; four springs 7; lower side protective box 8; pressing plate 9; pre-tightening bolt 10; mortar protective layer 11; steel cylinder 12; first clamping block 13; second clamping block 14; bolts 15 and 16; base 17; connecting rotating shaft 20; outer side protective shell 21, first connecting spring 22; second connecting spring 23; third connecting spring 24; second inner side protective layer 25; socket steel ring 26; rubber sealing ring 27. DETAILED DESCRIPTION

[0041] The application will be further described below in conjunction with the accompanying drawings.

[0042] As shown in Figures 1 to 13 , the embodiment provides a manufacturing method of a new PCCP pipe with a pipe length of 5m and a pre-embedded static water level and displacement meter, and a pipe settlement and displacement monitoring process based on multi-source data fusion. The corresponding construction steps of the new PCCP pipe for monitoring settlement and displacement based on multi-source data fusion in the embodiment are as shown in Figure 1 , and specifically include the following links:

[0043] Step (1): Make the socket steel ring and the socket steel ring for connecting the pipe joint. At the same time, make the steel cylinder, roll the steel plate into a 1.5mm long strip, and weld the steel plate joint. Then weld the socket steel ring and the socket steel ring to the two ends of the steel cylinder respectively.

[0044] Step (2): Make bolt connecting piece, static water level protection piece, displacement meter fixing piece, displacement meter L-shaped baffle and displacement meter flexible protection device respectively.

[0045] Step (3): Pour the pipe core concrete, as Figure 2The pipe core is poured by vertical vibration method, and the anchoring device of the tensioned prestressed steel wire and the bolt connecting piece are embedded outside the pipe core before the pouring operation. The steel cylinder with the socket steel ring and the spigot steel ring welded is hoisted into the pipe core pouring inner mold for accurate positioning, and the socket ring should be consistent with the working surface of the bottom mold. The concrete is mixed according to the C55 type concrete batching formula, and the concrete is poured along the inner and outer walls of the steel mold, so that the steel cylinder is embedded in the concrete. The vibrator is started at the same time of pouring to ensure the compaction of the concrete. The inner diameter of the pipe core is 1800mm, the outer diameter of the steel cylinder is 1923mm, and the thickness of the pipe core is 200mm. After pouring, the pipe core concrete is steam cured, and when the concrete strength reaches 70% of the design strength, the next step is entered.

[0046] Step (4): winding prestressed steel wire. As shown in Figure 3 The cured pipe core is placed on the prestressed wire winding table, and a layer of cement grout is sprayed on the surface of the pipe core before the winding operation. The pipe core is rotated at a speed of v3 by rotating the base of the winding table, the stress generating device 5 is rotated at a speed of v2 and advances along the pipe axis at a speed of vi, the rotating speed v2 of the stress generating device 5 is less than the rotating speed v3 of the rotating table, so that the high-strength steel wire 4 with a diameter of 5mm (elastic modulus 205000MPa, tensile strength 1570MPa) generates a prestress of 1100MPa (70% of the tensile strength of the steel wire), and is wound on the outside of the pipe core concrete with a pitch of 20mm. During the winding process, attention should be paid to avoid the position of the embedded bolt connecting piece, and the stress fluctuation of the steel wire should also be monitored throughout the process.

[0047] Step (5): roller radiation mortar protective layer. The mortar is configured according to the M45 type mortar strength, and the total thickness of the mortar protective layer after roller radiation is not less than 30mm.

[0048] Step (6): roller radiation epoxy coal tar anticorrosion coating.

[0049] Step (7): hoist the pipe to the site installation and positioning, install the high-precision static level instrument to the specified position, and install the static level instrument protection piece outside the sensor. The structure of the static level instrument protection piece is as shown in Figure 4As shown, the upper protective cover, the center pressure rod 6, the four springs 7, the lower protective box 8 and the pressure plate 9 are shown. The static level gauge is installed in the lower protective box 8, and the lower protective box 8 is provided with four bolt holes for connecting with the bolt connecting members of the pipe core concrete. The four springs 7 are used to connect the lower protective box 8 with the upper protective cover and the center pressure rod 6, and the upper protective cover is used to protect the four springs 7. The pressure plate 9 is connected with the center pressure rod and closely contacts the static level gauge. The strong spring of the structure can apply a pre-tightening force to the static level gauge through the center pressure rod and the pressure plate 9, so as to ensure that the static level gauge closely contacts the pipe wall surface. Figure 5 Figure 10 is a pre-tightening bolt, figure 11 is a mortar protective layer, and figure 12 is a steel cylinder.

[0050] Step (8): The displacement meter L-shaped baffle and the displacement meter fixing member are respectively installed at the pipe socket end and the spigot end, as shown in Figure 6 Figure 18 is a displacement meter L-shaped baffle, figure 19 is a displacement meter, and the remaining structure is a displacement meter fixing member. The displacement meter fixing member is composed of two clamping blocks 13 and 14, a base 17, a connecting shaft 20, bolts 15 and 16. The two clamping blocks 13 and 14 are connected with the base 17 through the connecting shaft 20, and the clamping blocks can rotate along the connecting shaft 20. After the displacement meter is installed and positioned, the two clamping blocks are closed, and then the bolts 15 and 16 are tightened. The base of the L-shaped baffle and the displacement meter fixing member is provided with bolt holes for connecting with the bolt connecting members embedded in the pipe core concrete.

[0051] Step (9): The displacement meter flexible protection device is installed outside the displacement meter L-shaped baffle and the displacement meter fixing member. As shown in Figure 7 The device mainly includes an outer protective shell 21, a first inner protective layer and a second inner protective layer 25, a first connecting spring 23, a second connecting spring 24 and a third connecting spring 22. The displacement meter L-shaped baffle and the displacement meter fixing member are installed in the first inner protective layer and the second inner protective layer 25. The first inner protective layer and the second inner protective layer 25 are respectively installed at the socket end and the spigot end, and are connected through the third connecting spring 22, and the base is provided with holes for bolt connection with the bolt connecting members. The first inner protective layer and the second inner protective layer 25 are connected with the outer protective shell 21 through the first connecting spring 23 and the second connecting spring 24, and the part of the outer protective shell 21 contacting the outer side of the pipe wall is not connected or bonded, and can freely move. Figure 8 Figure 26 is a socket steel ring matched with the spigot steel ring 1, and figure 27 is a rubber sealing ring.

[0052] Step (10): The static level gauge and the displacement meter are respectively connected with the data acquisition instrument, and the real-time monitoring of the pipe settlement and displacement is carried out.

[0053] Data collection and pipeline settlement and fault detection test experiment of example one:

[0054] In order to verify the effectiveness of the application for monitoring the relative settlement and fault of the pipeline, two new PCCP pipelines manufactured by the method introduced in example one are used to carry out the test of the relative settlement and fault of the pipeline. The two pipelines are connected through the end-to-end socket joints. The inner diameter of the pipeline is 1.8 m, and the axial length is 5 m. A high-precision static level gauge is used for measurement, with a measurement range of ±5 mm, a precision of 0.01 mm / m, and a working temperature of-20℃ to +50℃. A high-precision linear displacement sensor is selected, with a measurement range of 0-500 mm, a precision of 0.05% full scale, and a working temperature of-40℃ to +125℃.

[0055] The relative positions of the sensors are shown in Figure 9 . Among them, the static level gauge is arranged at the top of the pipeline section in the middle of the pipeline, and the displacement meter is arranged at the socket joint section of the pipeline. Four displacement meters are considered. The No. ① sensor in the figure is a static level gauge, and the remaining No. ②, No. ③, No. ④, and No. ⑤ sensors are displacement meters. A PCCP pipeline joint settlement and fault monitoring method based on multi-source data fusion includes the following steps:

[0056] (a) The actual joint settlement and fault value is decomposed into four displacement components: horizontal deflection θ, vertical deflection φ, and axial translation Δz and vertical translation Δy.

[0057] (b) According to the positions and quantities of the static level gauge and the displacement meter, the changes in the readings of the static level gauge and the displacement meter caused by the four displacement components acting alone are derived using rigid body displacement and related theories. Figure 10 、 Figure 11 、 Figure 12 and Figure 13 are schematic diagrams of the pipeline occurring relative horizontal deflection θ, vertical deflection φ, and axial translation Δz and vertical translation Δy, respectively. According to rigid body displacement and related theories, the change values of the sensor readings caused by each displacement component acting alone can be derived, as shown in Table 1. In the table, R represents the radius of the pipeline, and L represents the length of the pipeline.

[0058] Table 1 Sensor reading values considering the effect of displacement components acting alone

[0059]

[0060] (c) Considering the combined effect of the four displacement components, the theoretical readings of each sensor at the position are calculated according to the superposition principle. For example, for the No. ② sensor, the theoretical reading value under the combined effect of the four displacement components is: The hydraulic loading device is used to apply simulated pipeline settlement displacement, and the specific values of the five sensors are recorded synchronously, as shown in Table 2.

[0061] Table 2 Sensor readings after settlement displacement (unit: mm)

[0062] Sensor No. 1 Sensor No. 2 Sensor No. 3 Sensor No. 4 Sensor No. 5 75.32 7.45 -30.41 -5.04 32.73

[0063] (d) A mathematical model is considered to be established to solve the relative settlement displacement value of the pipeline:

[0064]

[0065] In the formula, is the theoretical value of the sensor reading at this point, M i is the actual monitoring value, and n is the number of sensors. In actual monitoring, there is often a certain deviation between the theoretical value and the monitoring value of the sensor reading. In this case, the influence of all sensors is considered, and the above optimization model is established, and the genetic algorithm is used to solve the settlement displacement value that meets the minimum deviation between the theoretical value and the monitoring value of all sensors.

[0066] For example, for sensor No. ①,

[0067] For sensor No. ②,

[0068] For sensor No. ③,

[0069] For sensor No. ④,

[0070] For sensor No. ⑤,

[0071] The above five expressions are expressions containing four displacement components. The mathematical model in formula (1) is input into the self-contained function of the MATLAB genetic algorithm toolbox, and four displacement components are obtained: horizontal deflection θ = -0.05, vertical deflection axial translation Δz = 1.15 mm, vertical translation Δy = 0.47 mm. The results obtained are brought into formula (1) again to calculate the deviation between the theoretical value and the monitoring value of all sensors, and the deviation calculation result is 25.01 mm. The pipeline diameter provided in this embodiment is 1800 mm, and the pipeline length is 5000 mm. It can be seen that the deviation of the settlement displacement is much smaller than the actual size of the pipeline structure, so the pipeline settlement displacement monitoring method based on multi-source data fusion provided by the present application has good effect.

[0072] The above merely describes the preferred embodiments of the present application, and it should be pointed out that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A device for monitoring the settlement and displacement of a prestressed steel cylinder concrete pipe based on multi-source data fusion, characterized in that: The utility model provides a kind of prestressed concrete cylinder pipe, including static level installed in the top side of pipe top of pipe middle section and displacement meter arranged in pipe socket section, protection piece is provided on the static level, and the protection piece includes upper side protection cover, center pressure rod, four springs, lower side protection box and pressing plate, the static level is installed in lower side protection box, and the lower side protection box is fixedly installed on concrete pipe, through hole is equipped in the top of lower side protection box, pressing plate is installed on the upper surface of static level, center pressure rod passes through the top through-hole of lower side protection box and is connected with pressing plate, upper side protection cover is fixedly installed above lower side protection box, four springs are located in upper side protection cover, and through the pulling force of four springs, center pressure rod is pressed, and pressing plate is tightly attached to static level;The displacement meter is fixed in socket end displacement meter fixing piece, and displacement meter fixing piece includes first clamping block, second clamping block, base, connecting pivot and bolt, the base is reserved with bolt hole for connecting bolt connecting piece embedded in pipe core concrete, and the base is connected with first clamping block and second clamping block by pivot, and first clamping block and second clamping block are used to clamp one end of displacement meter, and the other end of displacement meter is fixedly connected with L-shaped baffle, and L-shaped baffle is installed on socket end;Displacement meter flexible protection device is installed outside displacement meter fixing piece and L-shaped baffle, and displacement meter flexible protection device includes first inner side protection layer, second inner side protection layer, outer side protection shell, first connecting spring, second connecting spring and third connecting spring, first inner side protection layer and second inner side protection layer are fixedly installed at pipe socket end and socket end respectively, outer side protection shell is equipped outside first inner side protection layer and second inner side protection layer, first connecting spring and second connecting spring are respectively arranged between outer side protection shell and first inner side protection layer and second inner side protection layer, and third connecting spring is connected between first inner side protection layer and second inner side protection layer, and bolt hole for connecting with pipe core concrete is arranged below first inner side protection layer and second inner side protection layer.

2. The device for monitoring the settlement and dislocation of the prestressed steel cylinder concrete pipe based on multi-source data fusion according to claim 1, characterized in that: Seven displacement meters are arranged at socket section of pipe with diameter of 3m or above, five displacement meters are arranged at socket section of pipe with diameter of 2-3m, four displacement meters are arranged at socket section of pipe with diameter less than 2m, and at least two displacement meters are arranged at the lower side of pipe, and cannot be arranged at pipe bottom. 3.The device for monitoring the settlement and dislocation of the prestressed steel cylinder concrete pipe based on multi-source data fusion according to claim 1, characterized in that: The static level is arranged at the top side of pipe top of pipe middle section.

4. The device for monitoring the settlement and dislocation of the prestressed steel cylinder concrete pipe based on multi-source data fusion according to claim 1, characterized in that: The prestressed concrete cylinder pipe is prepared by the following steps: S1, make socket steel ring, socket steel ring and steel cylinder for connecting pipe joint, and weld socket steel ring and socket steel ring to both ends of steel cylinder; S2, make bolt connecting piece, static level protection piece, displacement meter fixing piece, displacement meter L-shaped baffle and displacement meter flexible protection device respectively, these devices should be made of materials with waterproof, moisture-proof, corrosion-resistant and other functions, to ensure that sensor works normally within the specified service life; S3, embed bolt connecting piece in formwork at specified position where static level and displacement meter are installed, and pour pipe core concrete; S4, stand pipe core after curing on rotating table, and wind prestressed steel wire; S5, roll sand mortar protective layer; S6, roll epoxy coal tar anticorrosive coating.

5. A monitoring method based on the device for monitoring the settlement and displacement of the prestressed steel cylinder concrete pipe according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: (a) hoist the pipeline to the site installation position, install the static level gauge to the designated position, install the static level gauge protection outside the static level gauge, fix the static level gauge protection with the fixing bolt, install the L-shaped baffle of the displacement meter and the displacement meter fixing member at the pipe socket end and the pipe spigot end respectively, fix the displacement meter in the displacement meter fixing member and tighten the bolt after the installation is completed, and then install the flexible protection device of the displacement meter; (b) decompose the actual joint settlement and displacement value into four displacement components: horizontal deflection θ, vertical deflection φ, axial translation Δz and vertical translation Δy; (c) according to the position and quantity of the static level gauge and the displacement meter, the change value of the reading of the static level gauge and the displacement meter caused by the four displacement components under the separate action of the four displacement components is derived respectively by using the rigid body displacement related theory; (d) considering the combined action of the four displacement components, the theoretical reading of the position of each sensor is calculated according to the superposition principle, and the following mathematical model is established to solve the relative settlement and displacement value of the pipeline: In the formula, T is the theoretical value of the sensor reading at this point, iθ T is the theoretical value of the i-th sensor when only relative horizontal deflection θ occurs, T is the theoretical value of the i-th sensor when only relative vertical deflection T occurs, iΔz T is the theoretical value of the i-th sensor when only relative axial translation Δz occurs, iΔy T is the theoretical value of the i-th sensor when only relative vertical translation Δy occurs, i T is the actual monitoring value, the actual monitoring value is the reading of the hydrostatic level and the displacement meter, n is the total number of displacement meters and hydrostatic levels, the settlement and displacement value that satisfies the minimum deviation of the theoretical value and the monitoring value of all sensors is solved, the corresponding horizontal deflection θ, vertical deflection Δz, and vertical translation Δy values are obtained, according to θ, Δz, Δy values and the threshold value in the manual, it is judged whether the prestressed concrete cylinder pipe settlement is safe.

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