A method for early warning and detection of fixed piers of urban heating pipelines

Abstract

The present invention provides a method for early warning determination and detection of fixed piers for urban heating pipelines, relating to the technical field of urban heating pipeline detection. The present invention provides two evaluation criteria: the horizontal displacement of the fixed pier caused by horizontal thrust, and the torsional displacement of the fixed pier caused by torsional stress. Respective criteria are given for each of the above two evaluation criteria, and a warning level for the displacement of fixed piers for urban heating pipelines is established by comprehensively analyzing the criteria of the two evaluation criteria. The present invention has the beneficial effect of overcoming deficiencies in early warning determination of the displacement of fixed piers for urban heating pipelines.

Description

Technical Field

[0001] The present invention relates to the technical field of urban heating pipeline detection, and in particular to an early warning determination and detection method for fixed piers of urban heating pipelines. Background Art

[0002] In practical engineering, because urban heating pipeline anchoring piers utilize a dual-pipe layout with parallel supply and return pipes, they are subject to significant horizontal thrust during normal operation, influenced by factors such as temperature, internal pressure, and end resistance. This can cause significant displacement of the anchoring piers, leading to displacement of the piers. Excessive displacement of the anchoring piers can damage the heating pipeline system and its associated structures, posing a significant engineering safety hazard. Therefore, developing an early warning method for displacement of urban heating pipeline anchoring piers is extremely urgent. Currently, few such studies have been reported. In previous anchoring pier designs, displacement of small-diameter heating pipelines was often neglected. However, with the increasing pace of urbanization and the expansion of urban capacity, small-diameter pipelines can no longer meet the needs of daily life and production. With the increasing number of large-diameter, high-pressure pipelines, this problem has become particularly severe. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a method for early warning determination and detection of fixed piers of urban heating pipelines, aiming to make up for the deficiencies in the existing method for early warning determination of displacement of urban heating pipelines.

[0004] A method for early warning determination and detection of fixed piers of urban heating pipelines comprises the following steps:

[0005] Step 1: Install three sets of displacement sensors on the water supply pipe side and the return pipe side of the fixed pier, respectively. Set two evaluation criteria for early warning detection: the horizontal displacement of the fixed pier caused by horizontal thrust and the torsional displacement of the fixed pier caused by torsional stress.

[0006] Step 2: Calculate the horizontal displacement of the fixed pier and the torsional displacement of the fixed pier respectively;

[0007] The horizontal displacement of the fixed pier is obtained by averaging the horizontal displacements measured by the three sets of displacement sensors on each side to obtain the horizontal displacements of the water supply pipe and return pipe sides of the fixed pier.

[0008] The torsional displacement of the fixed pier is obtained by the horizontal displacement and the torsional angle. Solve:

[0009] in is the torsion angle of the fixed pier, d is the length of the fixed pier; L1 and L2 are the horizontal displacement of the outer side of the water supply pipe and the outer side of the return pipe respectively;

[0010] Step 3: Give the respective judgment criteria for the above two evaluation bases;

[0011] The horizontal displacement of the fixed pier caused by the horizontal thrust, i.e., the determination criteria for the horizontal displacement of the fixed pier, are as follows:

[0012]

[0013] First-level standard for horizontal displacement of fixed piers: 0<λ≤60%

[0014] Secondary standard for horizontal displacement of fixed piers: 60%<λ≤80%

[0015] Level 3 standard for horizontal displacement of fixed piers: 80%<λ≤100%

[0016] Where λ is the ratio of the actual horizontal displacement of the fixed pier to the maximum allowable horizontal displacement of the fixed pier; L d is the maximum allowable horizontal displacement of the fixed pier; L1 is the horizontal displacement of the outer side of the water supply pipe; L2 is the horizontal displacement of the outer side of the return pipe;

[0017] The determination criteria for the torsional displacement of the fixed pier caused by the torsional stress, i.e., the torsional displacement of the fixed pier, are as follows:

[0018]

[0019] First-level standard for torsional displacement of fixed piers: 0<η≤70%

[0020] Secondary standard for torsional displacement of fixed piers: 70%<η≤90%

[0021] The third-level standard for the torsional displacement of fixed piers: 90%<η≤100%

[0022] Where, η is the ratio of actual torsional displacement to allowable torsional displacement; d is the length of the fixed pier; is the torsion angle of the fixed pier; N d is the maximum allowable torsional displacement of the fixed pier.

[0023] Step 4: Classify the displacement warning levels of fixed piers of urban heating pipelines by comprehensively analyzing the judgment criteria of the two evaluation bases, and realize the detection of fixed piers of urban heating pipelines according to the warning levels;

[0024] The warning levels include: level one warning, level two warning and level three warning;

[0025] The first-level warning means that both evaluation criteria must meet their respective first-level standards at the same time;

[0026] For a Level 2 warning, both evaluation criteria must meet their respective Level 2 standards, or one of them must meet the Level 1 standard and the other the Level 2 standard.

[0027] A Level 3 warning indicates that a Level 3 standard has been met in any of the two evaluation criteria.

[0028] The beneficial effects of adopting the above technical solution are:

[0029] This invention provides a method for early warning and detection of fixed piers for urban heating pipelines. This method addresses deficiencies in early warning and detection of displacement in urban heating pipelines, offering a more scientific and effective approach. This method utilizes two criteria simultaneously, rather than a single one. Each criterion has its own independent criteria, and neither influences the other. Ultimately, the combined results of the two criteria determine the early warning level for displacement of fixed piers for urban heating pipelines, resulting in more accurate results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of a method for early warning determination and detection of fixed piers of urban heating pipelines provided in an embodiment of the present invention;

[0031] Figure 2 This is a structural diagram of a displacement sensor according to an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the torsion of the fixed pier of the urban heating pipeline in an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the horizontal displacement of the fixed pier in an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the torsional displacement of the fixed pier in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0036] A method for early warning determination and detection of fixed piers of urban heating pipelines, such as Figure 1 As shown, the following steps are included:

[0037] Step 1: Install three sets of displacement sensors on the water supply pipe side and the return pipe side of the fixed pier, such as Figure 2 As shown in FIG, two evaluation criteria for early warning detection are set, namely, the horizontal displacement of the fixed pier caused by the horizontal thrust and the torsional displacement of the fixed pier caused by the torsional stress;

[0038] Step 2: Calculate the horizontal displacement of the fixed pier and the torsional displacement of the fixed pier respectively;

[0039] The horizontal displacement of the fixed pier is obtained by averaging the horizontal displacements measured by the three sets of displacement sensors on each side to obtain the horizontal displacements of the water supply pipe and return pipe sides of the fixed pier.

[0040] The torsional displacement of the fixed pier is as follows: Figure 3 As shown, the solution is obtained by horizontal displacement and torsion angle:

[0041] in is the torsion angle of the fixed pier, d is the length of the fixed pier; L1 and L2 are the horizontal displacement of the outer side of the water supply pipe and the outer side of the return pipe respectively;

[0042] Step 3: Give the respective judgment criteria for the above two evaluation bases;

[0043] The horizontal displacement of the fixed pier caused by the horizontal thrust, i.e., the determination criteria for the horizontal displacement of the fixed pier, are as follows:

[0044]

[0045] First-level standard for horizontal displacement of fixed piers: 0<λ≤60%

[0046] Secondary standard for horizontal displacement of fixed piers: 60%<λ≤80%

[0047] Level 3 standard for horizontal displacement of fixed piers: 80%<λ≤100%

[0048] Where λ is the ratio of the actual horizontal displacement of the fixed pier to the maximum allowable horizontal displacement of the fixed pier; L d is the maximum allowable horizontal displacement of the fixed pier; L1 is the horizontal displacement of the outer side of the water supply pipe; L2 is the horizontal displacement of the outer side of the return pipe, such as Figure 4 As shown;

[0049] The determination criteria for the torsional displacement of the fixed pier caused by the torsional stress, i.e., the torsional displacement of the fixed pier, are as follows:

[0050]

[0051] First-level standard for torsional displacement of fixed piers: 0<η≤70%

[0052] Secondary standard for torsional displacement of fixed piers: 70%<η≤90%

[0053] The third-level standard for the torsional displacement of fixed piers: 90%<η≤100%

[0054] Where, η is the ratio of actual torsional displacement to allowable torsional displacement; d is the length of the fixed pier; is the torsion angle of the fixed pier, such as Figure 5 As shown; N d is the maximum allowable torsional displacement of the fixed pier.

[0055] Step 4: Classify the displacement warning levels of fixed piers of urban heating pipelines by comprehensively analyzing the judgment criteria of the two evaluation bases, and realize the detection of fixed piers of urban heating pipelines according to the warning levels;

[0056] The warning levels include: level one warning, level two warning and level three warning;

[0057] The first-level warning means that the two evaluation criteria must meet their respective first-level standards at the same time, indicating that the displacement of the fixed pier is within the tolerance range, will not affect the pipeline and its ancillary structures, and meet normal production and living requirements.

[0058] Level 2 warning means that both evaluation criteria must meet their respective level 2 standards simultaneously, or one must meet the level 1 standard and the other level 2 standard. This means that the level 1 warning limit has been exceeded and the fixed piers have experienced significant displacement, which has a certain impact on the heating pipe system and its ancillary structures and should be considered in structural calculations. However, it does not affect normal operation.

[0059] A Level 3 warning indicates that two criteria have reached Level 3 standards. This means that the heating pipe system and its ancillary structures are on the verge of failure and that work should be stopped immediately and repairs should be carried out to prevent further safety hazards.

[0060] The above description is merely a preferred embodiment of the present disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also encompass other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned inventive concept. For example, a technical solution formed by mutually replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A method for early warning determination and detection of fixed piers of urban heating pipelines, characterized in that: The following steps are involved: Step 1: Install three sets of displacement sensors on the water supply pipe side and the return pipe side of the fixed pier, respectively. Set two evaluation criteria for early warning detection: the horizontal displacement of the fixed pier caused by horizontal thrust and the torsional displacement of the fixed pier caused by torsional stress. Step 2: Calculate the horizontal displacement of the fixed pier and the torsional displacement of the fixed pier respectively; Step 3: Give respective criteria for the two evaluation criteria: the horizontal displacement of the fixed pier caused by the horizontal thrust and the torsional displacement of the fixed pier caused by the torsional stress; Step 4: Classify the displacement warning levels of fixed piers of urban heating pipelines by comprehensively analyzing the judgment criteria of the two evaluation bases, and realize the detection of fixed piers of urban heating pipelines according to the warning levels; The horizontal displacement of the fixed pier in step 2 is obtained by averaging the horizontal displacements measured by the three sets of displacement sensors on each side to obtain the horizontal displacements of the fixed pier's water supply pipe and return pipe sides; The torsional displacement of the fixed pier is obtained by the horizontal displacement and the torsional angle. Solve: in is the torsion angle of the fixed pier, d is the length of the fixed pier; L1 and L2 are the horizontal displacement of the outer side of the water supply pipe and the outer side of the return pipe respectively; The horizontal displacement of the fixed pier caused by the horizontal thrust in step 3, i.e., the determination criteria for the horizontal displacement of the fixed pier, are as follows: First-level standard for horizontal displacement of fixed piers: 0<λ≤60% Secondary standard for horizontal displacement of fixed piers: 60%<λ≤80% Level 3 standard for horizontal displacement of fixed piers: 80%<λ≤100% Where λ is the ratio of the actual horizontal displacement of the fixed pier to the maximum allowable horizontal displacement of the fixed pier; L d is the maximum allowable horizontal displacement of the fixed pier; L1 is the horizontal displacement of the outer side of the water supply pipe; L2 is the horizontal displacement of the outer side of the return pipe; The determination criteria for the torsional displacement of the fixed pier caused by the torsional stress, i.e., the torsional displacement of the fixed pier, are as follows: First-level standard for torsional displacement of fixed piers: 0<η≤70% Secondary standard for torsional displacement of fixed piers: 70%<η≤90% The third-level standard for the torsional displacement of fixed piers: 90%<η≤100% Where, η is the ratio of actual torsional displacement to allowable torsional displacement; d is the length of the fixed pier; is the torsion angle of the fixed pier; N d is the maximum allowable torsional displacement of the fixed pier; The warning levels described in step 4 include: level one warning, level two warning, and level three warning; The first-level warning means that both evaluation criteria must meet their respective first-level standards at the same time; For a Level 2 warning, both evaluation criteria must meet their respective Level 2 standards, or one of them must meet the Level 1 standard and the other the Level 2 standard. A Level 3 warning indicates that a Level 3 standard has been met in any of the two evaluation criteria.

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