CN115854976A - Settlement observation device and method for low-temperature storage tank - Google Patents
Settlement observation device and method for low-temperature storage tank Download PDFInfo
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- CN115854976A CN115854976A CN202111576054.9A CN202111576054A CN115854976A CN 115854976 A CN115854976 A CN 115854976A CN 202111576054 A CN202111576054 A CN 202111576054A CN 115854976 A CN115854976 A CN 115854976A
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- 238000005259 measurement Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims 5
- 238000010276 construction Methods 0.000 description 21
- 238000001514 detection method Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
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- 238000005266 casting Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a settlement observation device and method for a low-temperature storage tank. The settlement observation device includes: a plurality of positioning members; the positioning pieces are respectively embedded in the periphery of each foundation pile, and are higher than the ground; one end of the positioning piece is exposed and extends horizontally to form an observation point which can be used for the horizontal detector to measure the height; the plurality of positioning pieces at least comprise two groups, the positioning pieces of each group are distributed in the same radial direction relative to the bearing platform at intervals, and the radial directions of the two groups are mutually vertical. The arrangement position of the positioning piece comprises most of the area from the periphery to the center of the bearing platform, so that the observation range of the settlement of the bearing platform is enlarged, the observation accuracy is improved to a greater extent, and the settlement and inclination conditions of the bearing platform in different bearing areas can be accurately determined.
Description
Technical Field
The invention relates to the technical field of low-temperature containers, in particular to a settlement observation device and method for a low-temperature storage tank.
Background
In a large low-temperature storage tank, because the temperature of the materials stored in the storage tank is low, in order to avoid the frost heaving circulation of the low-temperature media and the soil in the storage tank from generating huge destructive power on the foundation, a high pile cap foundation is usually adopted. Most of substances stored in the storage tank are dangerous chemicals, and considering that the storage requirement and the weight of the storage tank and the tank body are large, the uneven settlement and inclination of the high pile bearing platform foundation are strictly controlled, so that safety and environmental protection accidents such as tank body inclination, cracking leakage, tank body deformation chucks and the like are avoided.
At present, a method for detecting settlement and inclination of a high pile cap of a large-scale low-temperature storage tank comprises the following steps: gradienter detection points are uniformly distributed along the edge of the upper surface of the bearing platform so as to measure the settlement and the inclination of the outer edge of the bearing platform, and inclinometer conveying pipes are respectively and horizontally embedded in the bearing platform along two vertical directions so as to measure the settlement and the inclination of the inner area of the bearing platform.
Because the inclinometer conveying pipe needs to be buried in the middle of the bearing platform, the method is easy to cause the displacement of the inclinometer conveying pipe during concrete pouring, and measurement errors are caused. And the avoidance of the pipeline inside the bearing platform needs to be considered during design and construction, so that the construction and measurement operation are complicated.
Disclosure of Invention
The invention aims to provide a settlement observation device of a low-temperature storage tank, which can ensure the measurement precision and simultaneously make the detection method simpler, more convenient and faster.
The invention also provides a settlement observation method of the low-temperature storage tank, which is based on the settlement observation device.
In order to solve the technical problems, the invention adopts the following technical scheme:
a settlement observation device of a low-temperature storage tank comprises a bearing platform and a tank body which is vertically fixed on the bearing platform and used for storing low-temperature liquid, wherein a plurality of foundation piles which are inserted and fixed on the ground are arranged below the bearing platform; the settlement observation device includes: a plurality of positioning members; the positioning pieces are respectively embedded in the periphery of each foundation pile, and are higher than the ground; one end of the positioning piece is exposed and extends horizontally to form an observation point for the horizontal detector to measure the height; the positioning pieces are divided into at least two groups, the positioning pieces of each group are distributed in the same radial direction relative to the bearing platform at intervals, and the radial directions of the two groups are mutually vertical.
According to one aspect of the invention, the positioning members are all located at the same height.
According to an aspect of the invention, a plurality of said positioning elements in the same radial direction are located on the same side of said foundation pile.
According to one aspect of the invention, there are at least 5 positioning elements in the same radial direction.
According to one aspect of the invention, the device further comprises a set of positioning members; the plurality of positioning pieces are arranged on the outer edge of the foundation pile at the outermost periphery of the bearing platform and are distributed circumferentially around the center of the bearing platform.
According to one aspect of the invention, at least 8 positioning elements are provided on the foundation piles located at the outermost periphery of the bearing platform.
According to one aspect of the invention, one of the positioning members is located at the center of the bearing platform.
According to one aspect of the invention, the rest of the positioning members located in the middle area between the outer periphery of the platform and the center of the platform are symmetrically distributed about the center.
According to one aspect of the invention, the positioning piece is a leveling bolt pre-embedded on the foundation pile, and a bolt head of the leveling bolt is exposed.
The invention also provides a settlement observation method of the low-temperature storage tank, which is characterized in that the settlement observation device is used for detecting the settlement of the bearing platform; the method comprises the following steps: measuring observation points on each foundation pile through a level detector to obtain the height of each observation point relative to a reference point of the level meter; and comparing the height obtained by measurement with the initially measured height to calculate a height difference value, and judging whether the bearing platform is settled and inclined.
According to one aspect of the invention, the step of judging whether the bearing platform is settled and inclined comprises the following steps: and comparing the numerical value of the height difference value obtained by calculation on each observation point in the same radial direction, determining the settlement change of the bearing platform in the height direction in different areas relative to the initial state under the bearing state according to the difference of the height difference values of the observation points in different positions, and determining the inclination of the bearing platform in the radial direction according to the settlement change of the different areas of the bearing platform.
According to the technical scheme, the settlement observation device for the low-temperature storage tank, provided by the invention, has at least the following advantages and positive effects:
firstly, because the pile head of the foundation pile is embedded into the bearing platform, the rigidity of the bearing platform is higher, and therefore the settlement of the pile head and the bearing platform has high consistency. The measured settlement of the foundation pile may represent the settlement of the pile on the platform corresponding to the position of the foundation pile.
A plurality of setting elements are pre-buried in advance in the periphery of foundation pile, and the one end of setting element exposes and extends along the level to form and supply the observation point of level detection appearance height measurement, can obtain the settlement of the foundation pile that this setting element corresponds to and is located according to the height value of measuring successively, promptly the settlement of cushion cap. And the positioning pieces are arranged at intervals in two mutually perpendicular radial directions relative to the bearing platform, and are similar to a cross shape, so that the arrangement position of the positioning pieces comprises most areas from the periphery to the center of the bearing platform, the observation range of the settlement of the bearing platform is enlarged, the observation accuracy is improved to a greater extent, and the settlement and inclination conditions of the bearing platform in different bearing areas can be accurately determined. The bearing platform is used as a main part for bearing the storage tank, the settlement observation device is only arranged on the foundation pile, an observation instrument is not required to be arranged on the bearing platform, the burden is not required to be increased for the construction of the bearing platform, and the construction period is effectively shortened.
The invention also provides a settlement observation method of the low-temperature storage tank, which comprises the steps of obtaining the height of each foundation pile through detection of the horizontal detector, determining the difference between the measured height and the initial height and the like so as to effectively determine the settlement and inclination states of the bearing platform. The method ensures the measurement precision, simultaneously enables the detection method to be simpler, more convenient and faster, and can effectively shorten the construction period, reduce the construction difficulty and save a large amount of cost.
Drawings
Fig. 1 is a schematic plan view of a settlement observation device of a cryogenic tank in an embodiment of the present invention.
Fig. 2 is a schematic structural view of a foundation pile under a cap in fig. 1.
Fig. 3 is a schematic view of observation points provided on the foundation pile in the embodiment of the present invention.
FIG. 4 is a schematic flow chart of a settlement observation method for a cryogenic storage tank according to an embodiment of the present invention.
The reference numerals are explained below:
1-bearing platform,
2-a tank body,
3-foundation pile,
4-positioning element, 41-observation point.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
The settlement observation device and method for a cryogenic storage tank provided in this embodiment will be described with reference to the accompanying drawings.
Referring to fig. 1 and 2, the cryogenic tank mainly includes a bearing platform 1, a tank body 2 vertically fixed on the bearing platform 1 for storing cryogenic liquid, and a plurality of foundation piles 3 disposed below the bearing platform 1.
The bearing platform 1 is a main part of the bearing tank body 2, is formed by casting concrete, and has a certain thickness. The bearing platform 1 is circular and is matched with the cylindrical shape dimension of the tank body. A plurality of foundation piles 3 inserted and fixed on the ground are arranged below the bearing platform 1. The pile 3 supports the platform 1 so that the tank body 2 is lifted off the ground. The foundation pile 3 is formed by pouring reinforced concrete, and the pile head of the foundation pile 3 is embedded into the bearing platform 1. The number of foundation piles 3 can reach hundreds for a large-scale low-temperature storage tank. And, a plurality of foundation piles 3 are uniformly distributed with respect to the cap 1 to uniformly share the gravity of the cap 1 and the tank body 2.
The settlement observation device includes a plurality of positioning members 4. Each positioning element 4 is arranged correspondingly to a foundation pile 3.
Referring to fig. 3 in combination with fig. 2, the positioning element 4 is pre-buried at the upper part of the foundation pile 3, and the positioning element 4 is higher than the ground. One end of the positioning member 4 is exposed and extends horizontally, and the end can be used as a reference object for convenient observation so as to form an observation point 41 for the horizontal detector to measure the height.
The working principle of the level detector is as follows: the level vial contains a level bubble which, when the level is tilted, moves toward the raised end of the level to determine the level. In use, the level gauge can be used to detect the level of the ground, and the height of the object to be detected can be measured and displayed by the distance measuring device arranged on the level gauge. The height measured by the level is relative to a reference point, referred to as the level's reference point.
When detecting, the level is set at the observation point 41, and the height of the observation point 41 relative to the reference point of the level can be directly obtained.
The height value of observation point 41 actually measured by the level is compared with the initially measured height to calculate a height difference value representing the amount of settlement of foundation pile 3. Since foundation pile 3 is embedded in bearing platform 1, the rigidity of bearing platform 1 is great, so that the settlement of pile head and bearing platform 1 has high uniformity. The measured amount of sinking of foundation pile 3 may represent the amount of sinking of this platform 1 corresponding to the position of foundation pile 3.
The initial measurement height refers to an initial height value obtained by measuring the observation point 41 on each foundation pile 3 by the level gauge after the completion of the pile cap pouring and before the first layer of wall concrete pouring (before the steel storage tank is installed for the steel tank after the completion of the pile cap pouring). In different stages from construction to test and operation, such as during construction of the tank body, during a hydrostatic test, during operation of the storage tank and the like, the foundation pile 3 inevitably sinks deeper into the ground under the action of gravity, so that the bearing platform 1 is locally settled.
As shown in fig. 3, the positioning element 4 is a stainless leveling bolt pre-embedded in the foundation pile 3, and an axis where the leveling bolt is located is parallel to the bearing platform 1. The bolt head of the leveling bolt is exposed for observation.
The positioning parts 4 are all positioned at the same height, so that the subsequent comparison of the heights is facilitated. Particularly, the positioning pieces 4 are uniformly arranged at the position with the height of about 400mm from the bottom surface of the bearing platform 1 during construction.
In this embodiment, the positioning member 4 only needs to be embedded in the foundation pile 3, and does not need to arrange an observation instrument on the bearing platform 1, and the construction of the bearing platform 1 is not affected, so that the construction of the bearing platform 1 is not required to be burdened, the construction difficulty is reduced, and the construction period can be effectively shortened. The purpose of detecting the settlement and the inclination of the bearing platform 1 can be realized only by a horizontal detector, and compared with the traditional detection mode adopting a level meter and an inclinometer, the cost is saved.
Referring back to fig. 1, the plurality of positioning members 4 includes two sets, the plurality of positioning members 4 in each set are spaced apart from each other in the same radial direction with respect to the platform 1, and the radial directions of the two sets are perpendicular to each other.
For convenience of description, one of the radial directions is identified as direction a, and the other radial direction is identified as direction B.
A plurality of positioning elements 4 in the same radial direction are located on the same side of foundation pile 3. Specifically, the positions of the observation points 41 of all the positioning members 4 in the a direction are all oriented in the same direction as indicated by arrows in fig. 1. Wherein a positioning member 4 is positioned in the center of the platform 1.
In the present embodiment, at least 5 positioning elements 4 are provided in the same radial direction. In fact, since the positioning member 4 located at the center of the platform 1 is located at the intersection point in both directions, the total number of the positioning members 4 of the two sets is not less than 9. Of course, in other embodiments, the number of the positioning members 4 may be specifically set according to the size of the platform 1.
In an embodiment, the settlement observation device is further provided with a set of positioning members 4, i.e. a third set of positioning members 4.
The set of spacers 4 surrounds the outer edge of foundation pile 3 located at the outermost periphery of platform 1 and is circumferentially distributed about the center of platform 1.
As shown in fig. 1, the circumferential direction of the set of positioning members 4 located on the outermost periphery of the platform 1 is denoted by C, and the positioning members 4 are located on the outer edge of the foundation pile 3 as indicated by arrows, with the observation points 41 facing outward. The purpose is to measure whether the outer periphery of the bearing platform 1 is settled.
In one embodiment there are at least 8 positioning elements 4 (including positioning elements 4 in both radial directions) on the foundation pile 3 located outermost on the platform 1.
The rest positioning elements 4 are uniformly distributed in the middle area between the outer periphery of the bearing platform 1 and the center of the bearing platform 1, and specifically, the positioning elements 4 may be distributed at intervals along different radial directions, may be distributed in groups of concentric circles with the center of the bearing platform 1 as the center of a circle, and may also be distributed in groups of triangles. The purpose of this is to detect whether the center of the platform 1 and the intermediate area thereof have settled.
The arrangement positions of the observation points 41 are in two mutually perpendicular radial directions and are similar to a cross shape, so that the observation points 41 comprise most areas from the periphery to the middle part and then to the center of the bearing platform 1, the observation range of the settlement of the bearing platform 1 is expanded, the observation accuracy is improved to a greater extent, and the settlement and inclination conditions of the bearing platform 1 in different bearing areas can be accurately determined.
In the present embodiment, the positioning members 4 are divided into two groups, respectively in two perpendicular directions. Of course, the positioning members 4 may be divided into three, four or more groups to be respectively located in different radial directions so as to cover the observation range of the platform 1 as much as possible.
Referring to fig. 4, the present embodiment further provides a settlement observation method implemented by the settlement observation device for a low-temperature storage tank.
The settlement observation method comprises the following steps:
and S110, measuring the observation points on each foundation pile through a horizontal detector to obtain the height of each observation point relative to the reference point of the horizontal detector.
The height measured by the level is relative to a reference point, referred to as the level's reference point. When detecting, the level is set at the observation point 41, and the height of the observation point 41 relative to the reference point of the level can be directly obtained.
S130, comparing the measured height with the initially measured height to calculate a height difference value, and judging whether the bearing platform is settled or inclined.
The initial measurement height refers to an initial height value obtained by measuring the observation point 41 on each foundation pile 3 by the level gauge after the completion of the pile cap pouring and before the first layer of wall concrete pouring (before the steel storage tank is installed for the steel tank after the completion of the pile cap pouring). In different stages from construction to test and operation, such as during construction of the tank body, during a hydrostatic test, during operation of the storage tank, and the like, the foundation pile 3 inevitably sinks deeper into the ground under the action of gravity, resulting in local settlement of the bearing platform 1. At this time, observation point 41 needs to be detected again.
The height difference is an absolute value, which is the difference between two height values measured by the level at the same observation point 41 in time sequence, and represents the settlement of the foundation pile 3 where the observation point 41 is located during the time period. By analyzing the settlement amount of each observation point 41, the settlement and inclination conditions of the bearing platform 1 in different bearing areas can be obtained.
In order to make the skilled person further understand how to judge the sinking and inclining of the platform 1, in step 130, the following are included:
comparing the numerical value of the height difference value obtained by calculation on each observation point 41 in the same radial direction, determining the settlement change of the bearing platform 1 in different areas relative to the initial state in height under the load-bearing state according to the numerical value difference of the height difference value of the observation points 41 in different positions, and determining the inclination of the bearing platform 1 in the radial direction according to the settlement change of the different areas of the bearing platform 1.
For example, if the settlement of the observation point 41 located in the middle area of the platform 1 is greater than the settlement of the observation point 41 located at the outer edge of the platform 1, it can be determined that the settlement of the middle area of the platform 1 is serious.
If the settlement amount of the observation point 41 located on the left side of the platform 1 in the same radial direction is larger than the settlement amount of the observation point 41 located on the right side of the platform 1, it is determined that the platform 1 is inclined to the left in the radial direction.
The method can obtain the settlement amount of the middle area of the bearing platform 1 without arranging an inclinometer conveying pipe in the bearing platform 1, thereby judging whether the bearing platform 1 is inclined or not. The measuring method is simpler and faster. And the construction period can be effectively shortened, and the construction difficulty is reduced.
The level meter is connected with the operation controller through a data transmission line, so that the detection result is transmitted to the operation controller through the data transmission line for the operation and judgment of the operation controller.
After receiving the detection results of the gradienters, the operation controller can calculate whether the height of each detection point of the gradienters is changed relative to the previous height and is the same as the height of other detection points of the gradienters, thereby judging whether the bearing platform 1 is settled and inclined.
In summary, the settlement observation device for the low-temperature storage tank provided by the invention at least has the following advantages and positive effects:
a plurality of setting elements 4 are pre-buried in advance on the periphery of foundation pile 3, and the one end of setting element 4 exposes and extends along the level to form and can supply the horizontal detector measuring height observation point 41, can obtain the settlement of the foundation pile 3 that this setting element 4 corresponds the place according to the height value of successively measuring, namely the settlement of cushion cap 1. Moreover, the positioning pieces 4 are arranged at intervals in two mutually perpendicular radial directions relative to the bearing platform 1, and are similar to a cross shape, so that the arrangement position of the positioning pieces 4 comprises most of the area from the periphery to the center of the bearing platform 1, the observation range of the settlement of the bearing platform 1 is enlarged, the observation accuracy is improved to a greater extent, and the settlement and inclination conditions of the bearing platform 1 in different bearing areas can be determined accurately. The bearing platform 1 is used as a main part for bearing the storage tank, the settlement observation device is only arranged on the foundation pile 3, an observation instrument is not required to be arranged on the bearing platform 1, the burden is not required to be increased for the construction of the bearing platform 1, and the construction period is effectively shortened.
The invention also provides a settlement observation method of the low-temperature storage tank, which comprises the steps of obtaining the height of each foundation pile 3 through detection of the horizontal detector, determining the difference between the measured height and the initial height and the like so as to effectively determine the settlement and inclination states of the bearing platform 1. The method ensures the measurement precision, simultaneously enables the detection method to be simpler, more convenient and faster, and can effectively shorten the construction period, reduce the construction difficulty and save a large amount of cost.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (11)
1. The settlement observation device of the low-temperature storage tank is characterized by comprising a bearing platform and a tank body which is vertically fixed on the bearing platform and used for storing low-temperature liquid, wherein a plurality of foundation piles which are inserted and fixed on the ground are arranged below the bearing platform; the settlement observation device includes:
a plurality of positioning members; the positioning pieces are respectively embedded in the periphery of each foundation pile, and are higher than the ground; one end of the positioning piece is exposed and extends horizontally to form an observation point for the horizontal detector to measure the height; the plurality of positioning pieces at least comprise two groups, the positioning pieces of each group are distributed in the same radial direction relative to the bearing platform at intervals, and the radial directions of the two groups are mutually vertical.
2. The sedimentation observation apparatus of claim 1, wherein the plurality of positioning members are all located at the same height.
3. Settlement observation apparatus as claimed in claim 1, wherein a plurality of the positioning members in the same radial direction are located on the same side of the foundation pile.
4. Sedimentation observation apparatus according to claim 1, wherein there are at least 5 positioning elements in the same radial direction.
5. The sedimentation observation apparatus of claim 1, further comprising a set of positioning members; the plurality of positioning pieces are arranged on the outer edge of the foundation pile at the outermost periphery of the bearing platform and are distributed circumferentially around the center of the bearing platform.
6. The settlement observation device according to claim 5, wherein at least 8 positioning members are provided on the foundation piles located at the outermost periphery of the bearing platform.
7. The sedimentation sight apparatus of claim 4, wherein one of the locating members is located at the centre of the platform.
8. Sedimentation observation apparatus according to claim 7, wherein the remaining positioning elements in an intermediate region between the outer periphery of the platform and the centre of the platform are evenly distributed.
9. The settlement observation device according to claim 1, wherein the positioning member is a leveling bolt embedded in the foundation pile, and a bolt head of the leveling bolt is exposed.
10. A settlement observation method for a cryogenic storage tank, characterized by detecting settlement of a platform by using the settlement observation device according to any one of claims 1 to 9; the method comprises the following steps:
measuring observation points on each foundation pile through a level detector to obtain the height of each observation point relative to a reference point of the level meter;
and comparing the height obtained by measurement with the initially measured height to calculate a height difference value, and judging whether the bearing platform is settled and inclined.
11. The settlement observation method according to claim 10, wherein the step of determining whether the platform is settled or inclined comprises:
and comparing the numerical value of the height difference value obtained by calculation on each observation point in the same radial direction, determining the settlement change of the bearing platform in the height direction in different areas relative to the initial state under the bearing state according to the difference of the height difference values of the observation points in different positions, and determining the inclination of the bearing platform in the radial direction according to the settlement change of the different areas of the bearing platform.
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