CN111323192B - Deep-buried pipeline vibration attenuation effect testing method based on dynamic compaction reinforcement - Google Patents
Deep-buried pipeline vibration attenuation effect testing method based on dynamic compaction reinforcement Download PDFInfo
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Abstract
The invention provides a testing method for vibration attenuation effect of a deep buried pipeline based on dynamic compaction reinforcement, which analyzes three aspects of vibration wave propagation rule in the dynamic compaction construction process, vibration speed attenuation effect after vibration isolation trenches are arranged and vibration influence on the buried pipeline. Research results show that the propagation direction of dynamic compaction vibration mainly takes the direction along the ground normal and the direction along the connecting line of a measuring point and a tamping point as main directions, the vibration along the tangential direction of the tamping point is weaker, the attenuation trends in the propagation processes in different directions are consistent, the attenuation trends are increased along with the propagation distance, the vibration speed is attenuated in a negative power exponential type, the attenuation is fastest in 20m, the attenuation speed is gradually reduced after 20m, and the vibration speed approaches zero after 100 m. The vibration isolation grooves have obvious attenuation effect on the vibration wave speed, and the vibration speed of the measuring points is attenuated by about 60 percent. The longitudinal strain of the embedded pipeline is tested, and the tangential strain of the pipeline at the vault is larger than that at the arch waist.
Description
Technical Field
The invention relates to the technical field of dynamic compaction vibration testing, in particular to a method for testing vibration attenuation effect of a deep-buried pipeline based on dynamic compaction reinforcement.
Background
With the increasing depth and breadth of urban development, especially the construction and development of the surrounding areas of cities, a lot of projects are inevitably close to urban water supply and oil supply pipelines. The buried depth of the crude oil pipeline embedded in the city is shallow, the protection measures are few, and the crude oil pipeline is easily influenced by external loads, so that the pipeline is deformed or damaged in the using process. With the acceleration of the urbanization development process, the land resources are more scarce, and the construction of a plurality of sites is close to an energy transmission pipeline arrangement area, which inevitably influences the safety of the pipeline. In the foundation treatment process, a common foundation treatment method of dynamic consolidation is widely used. The foundation dynamic compaction is used as a main foundation reinforcing mode, the ground is compacted by using a free falling body of the falling hammer, and huge impact energy is generated when the falling hammer is in contact with the ground to cause the ground to vibrate. Therefore, if the field is reinforced by dynamic compaction, the peripheral pipelines are inevitably affected. The vibration influence on the peripheral deeply buried pipeline in the dynamic compaction construction process is a key point of attention of engineers, and how to evaluate the influence of the dynamic compaction on the peripheral deeply buried pipeline is a difficult point of research.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a method for testing the vibration attenuation effect of the deep buried pipeline based on dynamic compaction reinforcement, which researches the propagation rule of dynamic compaction vibration, the vibration attenuation effect after the vibration isolation groove is arranged and the vibration influence on the buried pipeline and provides scientific basis for constructors to determine the dynamic compaction construction range and the vibration isolation design.
The technical scheme of the invention is realized as follows:
a test method for vibration attenuation effect of a deep-buried pipeline based on dynamic compaction reinforcement comprises the following steps:
s1, tamping a tamping point A of a free field by using a dynamic compaction machine, monitoring and recording vibration speeds in the X direction, the Y direction and the Z direction of a test point corresponding to the tamping point A by using a vibration measuring system, drawing a variation curve of the vibration speeds in the X direction, the Y direction and the Z direction along with a propagation distance according to recorded data, and finding out a position corresponding to a vibration speed attenuation threshold;
s2, arranging a vibration isolation trench at a position corresponding to a vibration velocity attenuation threshold value on a free field, tamping a tamping point A by using a dynamic compactor, monitoring and recording vibration velocities of a test point corresponding to the tamping point A in the X direction and the Z direction by using a vibration measurement system, drawing a variation curve of the vibration velocities in the X direction and the Z direction along with a propagation distance through recorded data, and finding out a position with the largest vibration velocity difference value between two test points as an optimal position of the vibration isolation trench;
s3, after the embedded test pipeline is embedded into the vibration isolation trench, tamping a tamping point A by using a dynamic compactor, monitoring and recording vibration speeds of the embedded test pipeline in three directions by using a dynamic acquisition system, and drawing a variation curve of the vibration speeds in the three directions along with a propagation distance according to recorded data to obtain the most obvious vibration in the Z direction, wherein the embedded test pipeline comprises a cast iron pipe and a PVC pipe;
s4, respectively carrying out dynamic strain measurement on different parts of the cast iron pipe and the PVC pipe by using a dynamic acquisition system, drawing strain comparison curves of the cast iron pipe and the PVC pipe in the vibration process of the different parts, and obtaining that the cast iron pipe is greatly influenced by the dynamic compaction vibration effect.
The three-way speed sensor is connected with the blasting vibration meter, the blasting vibration meter is connected with the computer, and the computer is connected with the printer; and a software analysis module is arranged in the computer and connected with the blasting vibration meter.
The method for selecting the test point corresponding to the tamping point A comprises the following steps: taking the tamping point A as a center, taking a point at a distance m from the tamping point A as a first test point, taking a point at a distance 2m from the tamping point A as a second test point until k test points are selected, wherein the distance from the kth test point to the tamping point A is m, and the vibration speed of the kth test point in three directions is less than a threshold value T.
The dynamic acquisition system comprises an acquisition instrument and a strain conditioner, wherein the acquisition instrument and the strain conditioner are both connected with a computer, the acquisition instrument is respectively arranged on the cast iron pipe and the PVC pipe, and the strain conditioner is respectively arranged on the cast iron pipe and the PVC pipe.
The beneficial effect that this technical scheme can produce:
(1) the invention researches the tamping test of the free field, the vibration speeds in the X direction and the Z direction of the free field are attenuated in a negative power exponential type along with the increase of the propagation distance, the attenuation is fastest in 20m, the attenuation speed is gradually reduced after 20m, and the vibration speed approaches to zero after 100 m;
(2) the invention researches the tamping test after the vibration isolation trench is arranged, the vibration isolation trench has obvious reduction effect on the vibration wave caused by the dynamic compaction construction, the vibration speed in the X direction and the vibration speed in the Z direction can be obviously found to be quickly attenuated at the vibration isolation trench, the vibration is more obvious at the upper part of the vibration isolation trench, the consumed vibration wave energy is more, and when the vibration isolation trench is arranged, the vibration isolation trench is dug as deep as possible, so that the better vibration isolation effect can be achieved;
(3) the method carries out tamping test on the longitudinal strain of the embedded test pipeline, and the tangential strain of the embedded test pipeline at the vault is greater than that at the arch waist.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a view of the layout of vibration isolation trench test points along an XZ plane in accordance with the present invention;
FIG. 2 is a block diagram of the vibration measurement system of the present invention;
FIG. 3 is a waveform diagram of measured vibration speed in X direction of a typical test point;
FIG. 4 is a waveform diagram of measured vibration speed in the Y direction of a typical test point;
FIG. 5 is a waveform diagram of measured vibration speed in Z direction of a typical test point;
FIG. 6 is a graph of the variation of the peak velocity of vibration in the X direction for a test point of the free field of the present invention;
FIG. 7 is a Z-direction vibration peak velocity profile of a test point of the free field of the present invention;
FIG. 8 is a graph showing the variation of the peak velocity of vibration in the X direction of a test point after the vibration isolation trench is formed;
FIG. 9 is a Z-direction vibration peak velocity variation curve diagram of a test point provided with a vibration isolation trench according to the present invention;
FIG. 10 is a graph showing the variation of peak vibration velocity in the X direction for different test points in the vibration isolation trench according to the present invention;
FIG. 11 is a graph showing the variation of the peak vibration velocity in the Z direction for different test points in the vibration isolation trench according to the present invention;
FIG. 12 is a plan view of the vibration isolation trench according to the present invention;
FIG. 13 is a layout view of pre-buried test pipes in the isolation trench of the present invention;
FIG. 14 is a strain gauge and test point layout diagram of the pre-buried test pipeline in the vibration isolation trench of the present invention;
FIG. 15 is a waveform diagram of measured vibration speed of a typical test point of the embedded test pipeline according to the present invention;
FIG. 16 is a graph comparing the vibration speed of different defense lines of the embedded test pipeline of the present invention;
FIG. 17 is a plot of the strain time in the direction E1 for a PVC pipe under the dynamic compaction of the present invention;
FIG. 18 is a plot of the strain time in the E2 direction for a PVC pipe under the dynamic compaction of the present invention;
FIG. 19 is a plot of the strain time in the direction of H1 for a PVC pipe under the dynamic compaction of the present invention;
FIG. 20 is a plot of strain time in the direction of H2 for a PVC pipe under the dynamic compaction of the present invention;
FIG. 21 is a graph showing the strain time in the direction H1 of a cast iron pipe under the dynamic compaction of the present invention;
FIG. 22 is a strain time curve in the direction of H2 for a cast iron pipe under the dynamic compaction of the present invention;
FIG. 23 is a longitudinal strain comparison graph of a PVC pipe and a cast iron pipe under the dynamic compaction of the present invention;
fig. 24 is a graph comparing the tangential strain of a PVC pipe and a cast iron pipe under the dynamic consolidation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The test site is positioned in an international logistics park of Qingshan Bao Bay of Wuhan, is 5km away from a high-speed railway station of Wuhan, is 5km away from a three-loop line and 1km away from a four-loop line, has obvious traffic advantages and has total floor area of 294428.59m2Integrally planning to construct two-layer standard elevated garage with ramp, wherein the floor area of the building is 214192.36m2. The construction content comprises the following steps: the method comprises the steps of warehousing, facility equipment and spare and accessory part manufacturing, processing and installation, cargo sorting, packaging, processing and related information processing. The storage capacity of the project after being built reaches 100 ten thousand tons, and the annual throughput reaches about 480 ten thousand tons. Meanwhile, a crude oil long-distance pipeline is involved near a project construction site, and if the pipeline is not properly tamped, the pipeline leaks, so that serious safety accidents are caused.
The drilling finds out that the field covering layer is 44.8-49.7 m thick, the geology is a Honghua layer of the Yangtze river of the New Tong river, and the geology can be divided into the following layers from top to bottom: the waste filling material mainly comprises domestic waste and construction waste, the waste filling material mainly comprises slag, plain filling soil, clay, fine sand and medium coarse sand, pebbles and siltstone. And the thickness of the stratum mainly containing the miscellaneous fill and the clay is about 16m, the soil quality of the stratum is low in strength, and the compressibility is high. The rest of the earth layer mainly containing sand and pebbles has high soil strength and low compressibility. Therefore, the safety condition of the petroleum pipeline in the dynamic compaction construction process needs to be analyzed by integrating the arrangement condition of the pipeline on site and the soil condition of the site, so that the safety of the petroleum pipeline in the construction process is ensured.
The dynamic compaction vibration test is respectively carried out under three different working conditions, the first working condition is a free field test working condition, namely, the field is directly tamped without any treatment; the second is a vibration isolation ditch test working condition, the vibration isolation ditch is arranged in the working condition, the distance from a tamping point is 25m, and the length, width and height of the vibration isolation ditch are 3m multiplied by 0.5m multiplied by 2.5 m; and the third is buried pipeline testing condition, namely, a cast iron pipe with the diameter of 22cm and a PVC pipe with the diameter of 32cm are buried in a ditch together, and backfilled and compacted. In order to reduce the influence that the ramming can propagate the law to dynamic compaction vibration, the utility model discloses fixed the position and the height of drop hammer, continuously rammed the same point, concrete operating mode is shown as table 1.
Table 1 site test condition table
As shown in fig. 2, the vibration measuring system adopted by the invention comprises a three-way speed sensor, a blasting vibration meter and a computer, wherein the model of the blasting vibration meter is TC-4850, so that the vibration condition can be observed in real time, and the test data can be analyzed and processed through matched blasting vibration analysis software; the three-way speed sensor is connected with a blasting vibration meter, the blasting vibration meter is connected with a computer, and the computer is connected with a printer; and a software analysis module is arranged in the computer and connected with the blasting vibration meter.
The embodiment of the invention provides a method for testing vibration attenuation effect of a deep-buried pipeline based on dynamic compaction reinforcement, which comprises the following specific steps:
s1, tamping a tamping point A of a free field by using a dynamic compaction machine, monitoring and recording vibration speeds in the X direction, the Y direction and the Z direction of a test point corresponding to the tamping point A by using a vibration measuring system, drawing a variation curve of the vibration speeds in the X direction, the Y direction and the Z direction along with a propagation distance according to recorded data, and finding out a position corresponding to a vibration speed attenuation threshold;
when the damping law of the vibration speed in the dynamic compaction vibration process under the working condition of a free field is explored, the X direction of the three-way speed sensor corresponds to the direction along the connecting line of the compaction point and the test point, the Y direction corresponds to the vertical direction along the connecting line of the compaction point and the test point, the Z direction is along the direction of the ground normal, and the selection method of the test point corresponding to the compaction point A comprises the following steps: taking a tamping point A as a center, taking a point at a distance =10m from the tamping point A as a first test point, taking a point at a distance 2m from the tamping point A as a second test point until k test points are selected, wherein the distance from the kth test point to the tamping point A is m, and the vibration speed of the kth test point =10 in three directions is less than a threshold value T = 0.03. Each test point monitors and records the vibration speed in the three directions, and the vibration measuring system and the arrangement of the test points are shown in figure 1.
As shown in fig. 3-5, the peak vibration speed of each test point in the X direction and the Y direction is relatively high, and the peak vibration speed in the Z direction is relatively low during the dynamic compaction construction process, which is related to the up-and-down vibration of the soil body caused by the vibration wave mainly as the shear wave and the front-and-back vibration of the soil body caused by the compression wave during the propagation process. On the other hand, as shown in fig. 6 and 7, the vibration speeds in the X direction and the Z direction are plotted by data according to the propagation distance, and it is known that the vibration attenuation trends in the two directions are consistent, both are increased according to the propagation distance, the vibration speed is attenuated in a negative power exponential type, the attenuation is fastest within 20m, the attenuation rate is gradually reduced after 20m, and the vibration speed approaches zero after 100 m.
S2, arranging a vibration isolation trench at a position corresponding to a vibration velocity attenuation threshold value on a free field, tamping a tamping point A by using a dynamic compactor, monitoring and recording vibration velocities of a test point corresponding to the tamping point A in the X direction and the Z direction by using a vibration measurement system, drawing a variation curve of the vibration velocities in the X direction and the Z direction along with a propagation distance through recorded data, and finding out a position with the largest vibration velocity difference value between two test points as an optimal position of the vibration isolation trench;
as shown in fig. 8 and 9, the vibration isolation trench has a significant reduction effect on vibration waves caused by dynamic compaction construction, the vibration speeds in the X direction and the Z direction can be significantly found to be rapidly attenuated at the vibration isolation trench, the average attenuation of the vibration speed can be 60% by calculating the ratio of the vibration speed difference between the front and rear measuring points at 25m to the front measuring point, and the vibration isolation effect is very significant.
In addition, as shown in fig. 10 and 11, according to the vibration velocity inside the vibration isolation trench, it can be compared and analyzed to find that the peak velocity at the upper part of the vibration isolation trench is significantly greater than the peak velocity at the lower part, which means that the vibration is more significant at the upper part of the vibration isolation trench and the energy of the vibration wave is more consumed, therefore, when the vibration isolation trench is installed, the trench should be dug as deep as possible, so that the better vibration isolation effect can be achieved.
S3, after the embedded test pipeline is embedded into the vibration isolation trench, tamping a tamping point A by using a dynamic compactor, monitoring and recording vibration speeds of the embedded test pipeline in three directions by using a dynamic acquisition system, and drawing a variation curve of the vibration speeds in the three directions along with a propagation distance according to recorded data to obtain the most obvious vibration in the Z direction, wherein the embedded test pipeline comprises a cast iron pipe and a PVC pipe;
s4, respectively carrying out dynamic strain measurement on different parts of the cast iron pipe and the PVC pipe by using a dynamic acquisition system, drawing strain comparison curves of the cast iron pipe and the PVC pipe in the vibration process of the different parts, and obtaining that the cast iron pipe is greatly influenced by the dynamic compaction vibration effect.
In order to test the influence of field dynamic compaction vibration on peripheral pipelines, a cast iron pipe with the diameter of 22cm and a PVC pipe with the diameter of 32cm are arranged in a dug vibration isolation ditch, and backfilling and compacting are carried out, so that the conditions of burial depth, compaction degree and the like of the two pipelines are consistent, the two pipelines are comparable, and the two pipelines can be used for comparatively analyzing the influence of the pipeline radius and pipeline materials on the pipeline response, and the pipeline arrangement is shown in figures 12-14. In addition, the system for testing the dynamic strain of the embedded test pipeline is a high-precision dynamic acquisition system, and an INV30 series 24-bit high-precision acquisition instrument and an INV1861 high-precision strain conditioner are adopted, so that dynamic or static strain measurement of 2-104 channels can be performed. The dynamic acquisition system comprises an acquisition instrument and a strain conditioner, wherein the acquisition instrument and the strain conditioner are both connected with a computer, the acquisition instrument is respectively arranged on the cast iron pipe and the PVC pipe, and the strain conditioner is respectively arranged on the cast iron pipe and the PVC pipe.
As can be seen from fig. 15 and 16, when dynamic compaction is performed, the vibration velocities of the vibration meter in the pipeline in three directions are significantly different, mainly in the Z direction and the X direction, and especially the vibration in the Z direction is most significant, so that in the design and construction of the pipeline, special attention needs to be paid to damage caused by the vibration in the normal direction of the ground. Secondly, according to the measurement of the dynamic strain of the pipeline, a strain time curve chart as shown in fig. 17-22 can be obtained, and the data is collated and analyzed, so that strain comparison curves in the vibration process of different parts of different materials as shown in fig. 23 and fig. 24 can be obtained. It can be seen that the longitudinal strain of the waist of the cast iron pipe is greater than that of the vault and waist of the PVC pipe, and the longitudinal strain of the vault of the PVC pipe is greater than that of the waist of the PVC pipe. For the cast iron pipe, the tangential strain at the arch top of the cast iron pipe is larger than that at the arch waist of the cast iron pipe, the tangential strain at the arch top of the cast iron pipe is steeply increased after the third tamping, the arch top of the cast iron pipe is a key focus position for tamping vibration, and the tangential strain at the arch waist of the PVC pipe is larger than that at the arch top. On the whole, the difference of the tangential strain of the pipelines made of different materials is not large under the action of dynamic compaction, the difference of longitudinal strain of the pipelines made of different materials is not obvious, but the strain conditions in two directions are integrated to discover that the cast iron pipe is greatly influenced by the action of dynamic compaction vibration.
At present, no relevant national standard exists for the safety evaluation of a structure under the action of a non-blasting load, and the safety evaluation is generally judged by means of relevant regulations on vibration speed in safety blasting regulations (GB 6722-2014), as shown in table 2, wherein a hydraulic tunnel is closest to a petroleum pipeline in a research object, and a frequency spectrum result based on actual measurement and numerical analysis shows that the response fundamental frequency of the pipeline is about 3.5Hz and lower than 10Hz, so that the corresponding vibration speed limit value is 7-8cm/s, and a calculation result shows that the maximum vibration speed of the pipeline is only 4cm/s and is smaller than the standard limit value when vibration isolation measures are not taken, so that the petroleum pipeline is proved to be safe beyond 25m of a ramming point. However, the evaluation index is not suitable for sensitive and serious-consequence objects such as petroleum pipelines, and the given vibration speed limit range is too large, so that the evaluation index can be deeply researched to investigate the accurate interval of the evaluation index.
TABLE 2 blasting vibration safety allowance criteria
Through the on-site dynamic compaction test under different operating modes, carry out deep research to dynamic compaction vibration propagation law, vibration isolation trench vibration isolation effect and dynamic compaction construction to the influence three aspects of different material buried pipeline in advance, can obtain:
(1) the propagation direction of the dynamic compaction vibration mainly takes the direction along the ground normal line and the direction along the connecting line of the measuring point and the compaction point as main directions, the vibration along the tangential direction of the compaction point is weaker, the attenuation trends in the propagation processes in different directions are consistent and are increased along with the propagation distance, the vibration speed is attenuated in a negative power exponential mode, the attenuation is fastest in 20m, the attenuation speed is gradually reduced after 20m, and the vibration speed approaches zero after 100 m.
(2) The vibration isolation trench has obvious attenuation effect on the vibration wave speed, and the vibration speed of the measuring point is attenuated by about 60%. Secondly, vibration on the upper part of the vibration isolation groove is more obvious than that on the bottom part, and more vibration wave energy is consumed. When the vibration isolation ditch is arranged, if the vibration isolation ditch is dug as deep as possible, a better vibration isolation effect can be achieved.
(3) The longitudinal strain of the embedded pipeline is tested, and the longitudinal strain of the arch waist of the cast iron pipe is larger than the longitudinal strain of the arch crown and the arch waist of the PVC pipe. The difference of the tangential strain of the pipelines made of different materials is not large under the action of dynamic compaction, and the difference of the longitudinal strain of the pipelines made of different materials is not obvious, but the strain conditions in two directions are integrated to discover that the cast iron pipe is greatly influenced by the action of dynamic compaction vibration, and particularly the strain condition at the arch top of the cast iron pipe needs to be focused.
(4) The results of the spectrum based on actual measurements and numerical analysis indicate that the petroleum pipeline is safe 25m from the point of impact.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (1)
1. A test method for vibration attenuation effect of a deep-buried pipeline based on dynamic compaction reinforcement is characterized by comprising the following steps:
s1, tamping a tamping point A of a free field by using a dynamic compaction machine, monitoring and recording vibration speeds in the X direction, the Y direction and the Z direction of a test point corresponding to the tamping point A by using a vibration measuring system, drawing a variation curve of the vibration speeds in the X direction, the Y direction and the Z direction along with a propagation distance according to recorded data, and finding out a position corresponding to a vibration speed attenuation threshold;
s2, arranging a vibration isolation trench at a position corresponding to the vibration speed attenuation threshold value on the free field, and digging as deep as possible when arranging the vibration isolation trench; tamping a tamping point A by using a dynamic compactor, monitoring and recording vibration speeds in the X direction and the Z direction of a test point corresponding to the tamping point A by using a vibration measurement system, drawing a variation curve of the vibration speeds in the X direction and the Z direction along with a propagation distance through recorded data, and finding out a position with the largest vibration speed difference between two test points as an optimal position of the vibration isolation trench;
s3, after the embedded test pipeline is embedded into the vibration isolation trench, tamping a tamping point A by using a dynamic compactor, monitoring and recording vibration speeds of the embedded test pipeline in three directions by using a dynamic acquisition system, and drawing a variation curve of the vibration speeds in the three directions along with a propagation distance according to recorded data to obtain the most obvious vibration in the Z direction, wherein the embedded test pipeline comprises a cast iron pipe and a PVC pipe;
s4, respectively carrying out dynamic strain measurement on different parts of the cast iron pipe and the PVC pipe by using a dynamic acquisition system, drawing strain comparison curves of the cast iron pipe and the PVC pipe in the vibration process of the different parts, and obtaining that the cast iron pipe is greatly influenced by the dynamic compaction vibration; the longitudinal strain at the arch top of the PVC pipe is greater than the longitudinal strain at the arch waist of the PVC pipe, and the tangential strain at the arch top of the cast iron pipe is greater than the arch waist of the cast iron pipe;
the method for selecting the test point corresponding to the tamping point A comprises the following steps: taking a tamping point A as a center, taking a point at a distance m from the tamping point A as a first test point, taking a point at a distance 2m from the tamping point A as a second test point until k test points are selected, wherein the distance from the kth test point to the tamping point A is k m, and the vibration speed of the kth test point in three directions is less than a threshold value T;
the vibration measuring system comprises a three-way speed sensor, a blasting vibration meter and a computer, wherein the three-way speed sensor is connected with the blasting vibration meter, the blasting vibration meter is connected with the computer, and the computer is connected with the printer; a software analysis module is configured in the computer and connected with the blasting vibration meter;
the dynamic acquisition system comprises an acquisition instrument and a strain conditioner, wherein the acquisition instrument and the strain conditioner are both connected with a computer, the acquisition instrument is respectively arranged on the cast iron pipe and the PVC pipe, and the strain conditioner is respectively arranged on the cast iron pipe and the PVC pipe.
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