A method and probe rod for detecting electric pipe jacking

Abstract

The present invention provides a method and a probe rod for detecting electric pipe jacking, including using a probe rod to probe at a first probe point, wherein the first probe point is one of the marking points on the path of the electric pipe jacking, and the probe rod is evenly provided with at least three steel bars along the circumference, and the characteristic that the vibration generated when the probe rod head touches the electric pipe jacking is transmitted along the electric pipe jacking to the working well head, and an audio vibrator is used to monitor the audio signals of each pipe bundle of the electric pipe jacking, and the audio signals of each pipe bundle are used to judge whether the probe head touches the electric pipe jacking, so as to accurately determine the path and burial depth of the electric pipe jacking by the position of the probe point and the probe depth calculated by the meter. The method of the present invention is widely applicable, does not require deep well excavation, can quickly obtain the path and burial depth of the electric pipe jacking, can save a lot of manpower and material resources, and has obvious advantages in economy and safety; by arranging steel bars on the circumference of the probe rod, the offset of the probe rod can be controlled within the allowable error range of 50 to 60 mm.

Description

Technical Field

[0001] The invention relates to the technical field of power pipe jacking path and buried depth detection, and in particular to a power pipe jacking detection method and a probe rod. Background Art

[0002] Pipe jacking construction is widely used in the construction of various underground pipelines in cities. Among them, power pipe jacking technology is widely used in the construction of underground cables crossing urban roads due to its greater economic efficiency and social effects. However, the early construction of projects was limited by the immature construction technology, irregular project data management, backward on-site detection equipment and other reasons. The completion data of power pipe jacking was missing or inconsistent with the actual situation to varying degrees. As a result, in the later excavation and drilling near the power pipe jacking, the pipe and cable were easily damaged due to the lack of relatively accurate data on the position and depth of the power pipe jacking, causing power outages.

[0003] Power pipe jacking usually uses MPP power pipes, and this article mainly discusses the detection of buried power MPP pipes.

[0004] In order to obtain the completion data of buried power pipe jacking, the main methods of pipe jacking detection currently used are to dig caissons in the pipe jacking section, use path detectors or inertial gyroscopes for detection. However, digging deep wells is expensive and time-consuming, and there are also certain risks such as collapse, insufficient ventilation and lighting; inertial gyroscope detection is only applicable to cable pipe jacking sites with spare pipes and unobstructed pipe holes. For situations where there are no spare pipes or the pipe holes are blocked, pipe penetration detection cannot be performed; using path detectors for detection, for power pipe jacking with a large burial depth (the current burial depth of power pipe jacking is about 5 to 10 meters), due to the complex interference factors in the urban underground pipeline detection environment, it is difficult to determine the degree of influence of the interference field on the underground pipeline detection, so it is impossible to accurately determine the path and burial depth.

[0005] Faced with the situation where external force damage is caused by missing or inaccurate information on the path and burial depth of power pipe jacking, there is an urgent need for a widely applicable detection method to quickly and accurately obtain the completed path and burial depth data information of the power pipe jacking. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to propose a method and a probe for detecting electric pipe jacking, so as to solve the problems that the existing detection methods have poor economy, high safety risks, inaccurate detection data information, or narrow applicability.

[0007] The present invention provides a method for detecting electric pipe jacking, the method comprising the following steps:

[0008] S1: vertically set the probe rod at the first drilling point, and fix the meter on the ground close to the probe rod; wherein the first drilling point is one of the marking points on the power pipe jacking path; at least three steel bars are evenly arranged along the circumference of the probe rod;

[0009] S2: hammering the probe perpendicularly to the ground with a first preset hammering force to obtain changes in the amount of soil penetration and rebound force of the probe rod in a single hammering;

[0010] When the amount of soil penetration of the probe rod by a single hammering is less than the preset value of sinking and the rebound force is greater than the preset value of elastic force, it is preliminarily determined that the head of the probe rod touches the power jacking pipe, and after obtaining and recording the position of the probe and the value of the meter, step S4 is executed; when the depth of the probe exceeds the preset value of the depth, and the amount of soil penetration of the probe rod by a single hammering is greater than the preset value of sinking or the rebound force is less than the preset value of elastic force, step S3 is executed;

[0011] S3: after the probe rod and the meter counter are horizontally moved by a preset adjustment value along the first drilling point, step S2 is executed;

[0012] S4: placing the audio vibrator probe close to the electric jacking pipe bundle in the working wellhead, hammering the probe rod with a second preset hammering force, obtaining an audio signal of each pipe bundle, and finally judging whether the probe rod head touches the electric jacking pipe according to the obtained multiple audio signals;

[0013] If it is determined that the head of the probe rod touches the power jacking pipe, the probe rod is pulled out, the first drilling point is re-determined and steps S1 to S4 are performed until all the marking points on the power jacking path are detected;

[0014] If it is determined that the head of the probe rod does not touch the power jacking pipe, the probe rod is pulled out, and step S3 is performed based on the pulled-out position of the probe rod.

[0015] Preferably, there are multiple probes at the output end of the audio vibrator, and each probe is electrically connected to the audio vibrator respectively.

[0016] Preferably, the range of horizontally moving the probe rod and the meter along the first probe point is within 2 m on both sides of the first probe point at right angles to the marking direction of the power pipe jacking path.

[0017] Further preferably, the preset adjustment value is 200 mm to 500 mm.

[0018] Preferably, whether the probe rod head touches the power jacking pipe is finally determined based on the audio intensity or timbre in the multiple audio signals.

[0019] Another object of the present invention is to provide an electric power pipe jacking detection probe rod, wherein at least three steel bars are evenly arranged along the circumference of the probe rod, and the steel bars and the probe rod are integrally formed.

[0020] Further preferably, the probe rod is divided into multiple sections, and two adjacent sections of the probe rod are threadedly connected at the connecting end;

[0021] Furthermore, the steel bars on the circumference of each section of the probe rod can be aligned after the sections of the probe rod are butt-jointed.

[0022] More preferably, the probe rod is round steel or a special archaeological probe.

[0023] Preferably, the number of the steel bars around the circumference is four.

[0024] It can be seen from the above technical solutions that the present invention has the following advantages:

[0025] The present invention provides a method for detecting electric pipe jacking. At the initially acquired marking point of the electric pipe jacking path, a probe rod is used for drilling. The characteristic that the probe rod head generates vibration when it touches the electric pipe jacking and transmits it to the working well mouth along the electric pipe jacking is utilized. An audio vibrator is used in the working well mouth to monitor the audio signals of each pipe bundle of the electric pipe jacking. The audio signals of each pipe bundle are used to judge whether the probe rod head is in contact with the electric pipe jacking, so as to accurately determine the path and burial depth of the electric pipe jacking according to the drilling position and the drilling depth calculated by the meter. The method of the present invention is not limited by whether there is a spare Whether the pipeline or pipe hole is unobstructed, it is widely applicable and does not require deep well excavation. The meter can quickly obtain the buried depth of the power pipe jacking, saving a lot of manpower and material resources, and has obvious advantages in economy and safety. By evenly arranging steel bars along the axial direction of the probe rod, the probe direction is kept vertically downward during the probe process, and the offset of the probe can be controlled within the allowable error range of 50mm to 60mm, which greatly improves the accuracy and efficiency of the probe, thereby improving the efficiency of power pipe jacking detection and the accuracy of obtaining pipe jacking path and buried depth data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A flow chart of a method for detecting electric pipe jacking provided in Embodiment 1 of the present invention;

[0028] Figure 2 A schematic diagram of a method for detecting electric pipe jacking provided in the first embodiment of the present invention;

[0029] Figure 3 A front view of a probe rod for detecting a power pipe jacking provided in the second embodiment of the present invention;

[0030] Figure 4 for Figure 3 AA cross-section in;

[0031] Among them, the figure numerals are explained as follows: probe rod 1, meter 2, electric jacking pipe 3, working wellhead 4, audio frequency vibrator 5, probe 6, head probe rod 7, steel bar 8. DETAILED DESCRIPTION

[0032] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] Unless otherwise clearly specified and limited, the terms "connection", "fixation" and "setting" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, unless otherwise clearly and specifically defined.

[0036] Embodiment 1 of the present invention provides a method for detecting electric pipe jacking, such as Figure 1 As shown, the method comprises the steps of:

[0037] S1: vertically set the probe rod 1 at the first drilling point, and fix the meter 2 on the ground close to the probe rod 1 to measure the drilling depth; wherein the first drilling point is one of the marking points on the power pipe jacking path; at least three steel bars are evenly arranged along the circumference of the probe rod 1;

[0038] It should be noted that the probe rod 1 can be a round steel with a diameter of 20mm to 30mm to ensure that the probe has the characteristic of being easy to enter the soil. The round steel material is preferably high manganese steel with good wear resistance. To facilitate the drilling operation, the probe rod 1 is divided into multiple sections, and two adjacent sections are threaded at the connecting end. The probe rod 1 can also be a special archaeological probe. Taking advantage of the characteristic that the special archaeological probe itself is easy to enter the soil, at least three steel bars are evenly arranged along the axial direction on the circumference of the special archaeological probe. In a specific embodiment, four steel bars are evenly arranged along the axial direction on the circumference of each section of the special archaeological probe, and the four steel bars on each section of the special archaeological probe can be aligned after each section of the probe is docked. The head type of the probe rod 1 is a pointed head, and it is subjected to rounding and passivation treatment before drilling, so as to ensure that the probe rod 1 is easy to enter the soil, and to avoid the probe rod 1 head touching the power jacking pipe 3 due to the combined action of sharpness and external force, thereby damaging the power jacking pipe 3 and the cable in the pipe.

[0039] A cable path detector can be used to preliminarily obtain the marking points of the power pipe jacking path. Specifically, the coupling method (clamp method) can be used in a non-power-off mode to roughly measure the approximate location of the power pipe jacking path and then use spray paint to mark it on the ground. It should be noted that the markings should be encrypted at the cable bends to improve the accuracy of path detection. This method is a prior art and the specific operation will not be repeated. The cable path detector can be used to roughly measure the power pipe jacking path and mark the power pipe jacking path marking points on the ground. There is also no need to excavate the earth, and the operation is convenient and quick, which can further improve the work efficiency of power pipe jacking detection.

[0040] S2: hammering the probe perpendicularly to the ground with a first preset hammering force to obtain the amount of soil penetration and the change of the rebound force of the probe rod 1 in a single hammering;

[0041] When the amount of soil penetration of the probe rod 1 by a single hammering is less than the preset value of sinking and the rebound force is greater than the preset value of elastic force, it is preliminarily determined that the head of the probe rod 1 touches the power jacking pipe 3, and after obtaining and recording the position of the probe and the value of the meter 2, step S4 is executed; when the depth of the probe exceeds the preset value of the depth, and the amount of soil penetration of the probe rod 1 by a single hammering is greater than the preset value of sinking or the rebound force is less than the preset value of elastic force, step S3 is executed;

[0042] Usually, the operator will determine the preset depth value based on the depth information of the marking point of the power pipe jacking path obtained initially. According to practical experience, usually when the head of the probe rod 1 touches the power pipe jacking 3, the amount of soil penetration will not change, so in a specific embodiment, the preset sinking value can be set to zero.

[0043] S3: After the probe rod 1 and the meter counter 2 are horizontally moved by a preset adjustment value along the first drilling point, step S2 is executed;

[0044] Among them, according to the error of the obtained marking points on the power pipe jacking path, it is necessary to horizontally move the probe rod 1 and the meter 2 within 2m on the left and right sides of the first probe point perpendicular to the direction of the power pipe jacking path, but the horizontal movement value each time is 200mm~500mm, that is, the value range of the preset adjustment value is 200mm~500mm, and the specific value can be flexibly selected by the operator according to the on-site detection situation and experience.

[0045] S4: placing the probe 6 of the audio vibrator 5 close to the bundle of the electric jacking pipe 3 in the wellhead 4, hammering the probe rod 1 with a second preset hammering force, obtaining an audio signal of each bundle, and finally judging whether the head of the probe rod 1 touches the electric jacking pipe 3 based on the obtained multiple audio signals;

[0046] If it is determined that the head of the probe rod 1 touches the power jacking pipe 3, the probe rod 1 is pulled out, the first drilling point is re-determined and steps S1 to S4 are executed until the detection of all the marking points on the power jacking path is completed;

[0047] If it is determined that the head of the probe rod 1 does not touch the power jacking pipe 3, the probe rod 1 is pulled out, and step S3 is performed based on the pulled-out position of the probe rod 1.

[0048] The second preset hammer force is intended to make the head of the probe rod 1 touch the power jacking pipe 3 to generate vibration. The force is smaller than the first preset hammer force and it is ensured that the power jacking pipe 3 and the cables inside the pipe will not be damaged.

[0049] Among them, the audio signal can be audio intensity or timbre: in the process of hammering the probe rod 1 with a second preset hammer force, the probe 6 is pressed against the end of each tube bundle of the power jacking pipe 3 one by one. In the embodiment of judging whether the head of the probe rod 1 touches the power jacking pipe 3 by the audio intensity signal, the audio intensity (amplitude) of each tube bundle can be obtained one by one through the audio vibrator 5, and the maximum difference of each audio intensity is calculated according to the obtained multiple audio intensities. According to the maximum difference of the audio intensity and the preset signal strength difference, it is finally judged whether the head of the probe rod 1 is in contact with the power jacking pipe 3; if the maximum difference of the audio intensity is greater than the preset signal strength difference, it is determined that the head of the probe rod 1 is in contact with the power jacking pipe 3, otherwise it is not in contact. At this time, the audio vibrator 5 can be a medical stethoscope, which listens and judges the audio signal strength through the human ear, or it can be an electronic instrument, which judges the audio intensity by obtaining intuitive data or image information. In the embodiment of judging whether the head of the probe rod 1 touches the electric jacking pipe 3 by the tone signal, when the probe rod 1 is struck with the second preset hammer force so that the head of the probe rod 1 touches the MPP electric pipe, the MPP electric pipe will emit a tone with a specific waveform, which is recorded as a preset tone spectrum. Therefore, the audio waveform of each pipe bundle can be obtained one by one through the audio vibrator 5 with the help of the probe 6. At this time, the audio vibrator 5 is an electronic instrument. The multiple audio waveforms obtained are compared with the preset tone spectrum respectively. If there is one that is highly consistent with the preset tone spectrum, it is determined that the head of the probe rod 1 is in contact with the electric jacking pipe 3, otherwise it is not in contact. The degree of high consistency can be set to be above 90%.

[0050] In a preferred embodiment, it is possible to determine whether the head of the probe rod 1 touches the electric jacking pipe 3 by combining the two signal types of audio intensity and timbre. That is, after preliminarily determining that the head of the probe rod 1 touches the electric jacking pipe 3 through the audio intensity signal, the timbre signal is used to verify whether the head of the probe rod 1 touches the electric jacking pipe 3, or after preliminarily determining that the head of the probe rod 1 touches the electric jacking pipe 3 through the timbre signal, the audio intensity signal is used to verify whether the head of the probe rod 1 touches the electric jacking pipe 3, thereby further improving the accuracy of the judgment.

[0051] The present invention provides a method for detecting electric pipe jacking, such as Figure 2As shown, at the initially acquired path marking point of the power jacking pipe 3, a probe rod 1 is used for drilling, and the characteristic that the head of the probe rod 1 generates vibration when it touches the power jacking pipe 3 and transmits it to the working wellhead along the power jacking pipe is utilized, and an audio vibrator 5 is used in the working wellhead 4 to monitor the audio signals of each pipe bundle of the power jacking pipe, and the audio signals of each pipe bundle are used to judge whether the head of the probe rod 1 is in contact with the power jacking pipe 3, so as to accurately determine the path and burial depth of the power jacking pipe 3 by the position of the drilling point and the drilling depth measured by the meter 2; the method of the present invention is not limited to whether there is a spare pipeline or whether the pipe hole is unobstructed, is widely applicable, and does not require deep well excavation, and can quickly obtain the power jacking pipe through the meter 2 The pipe burial depth saves a lot of manpower and material resources, and has obvious advantages in economy and safety; by evenly arranging steel bars axially along the circumference of the probe rod 1, the direction of the probe is kept vertically downward during the probe process, and the offset of the probe can be controlled within the allowable error range of 50mm to 60mm, which greatly improves the accuracy and efficiency of the probe, thereby improving the efficiency of power pipe jacking detection and the accuracy of obtaining pipe jacking path and burial depth data, avoiding the problems of poor economy, high safety risks, inaccurate detection data information, or narrow applicability in digging caissons in the pipe jacking section, using path detectors or inertial gyroscopes, and conducting power pipe jacking detection.

[0052] In a preferred embodiment, there are multiple probes 6 at the output end of the audio vibrator 5, and each probe 6 is electrically connected to the audio vibrator 5. When the probe rod 1 is hammered with a second preset hammer force, each probe 6 is pressed against the end of each pipe bundle, so that the audio signal of each pipe bundle can be monitored simultaneously, and it can be directly determined at one time whether the head of the probe rod 1 is in contact with the power jacking pipe 3, thereby further improving work efficiency.

[0053] Embodiment 2 of the present invention provides an electric pipe jacking detection probe rod used in any of the above-mentioned electric pipe jacking detection methods, such as Figure 3 and Figure 4 As shown, at least three steel bars 8 are evenly arranged along the circumference of the probe rod, and the steel bars 8 are integrally formed with the probe rod to ensure the structural strength and verticality of the probe rod.

[0054] In a preferred embodiment, in order to facilitate the drilling operation, the probe rod is divided into multiple sections, each section has the same length, and each section can be 1.5m, 2m, etc. The adjacent two sections of the probe rod are threadedly connected at the connecting end, and the steel bars on the circumference of each section of the probe rod can be butted after the sections of the probe rod are butted. Figure 3 Shown is the head probe 7, located at the head of the probe.

[0055] In a more preferred embodiment, the probe rod is round steel or a special archaeological probe.

[0056] In a more preferred embodiment, the number of circumferential steel bars 8 is four, and three may also be used. However, compared with three, using four can fully improve the axial bending resistance of the probe rod 7 after being hammered and buried in the ground, prompting the probe direction to remain vertically downward during the probe process, thereby reducing the probe offset.

[0057] In a more preferred embodiment, the steel bar 8 is arranged along the axial direction of the probe rod to reduce the resistance of the steel bar 8 when entering the soil, thereby ensuring that the probe rod can be easily inserted into the soil.

[0058] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting electric pipe jacking, characterized in that: The method steps include: S1: vertically set the probe rod at the first drilling point, and fix the meter on the ground close to the probe rod; wherein the first drilling point is one of the marking points on the power pipe jacking path; at least three steel bars are evenly arranged along the circumference of the probe rod; S2: hammering the probe perpendicularly to the ground with a first preset hammering force to obtain changes in the amount of soil penetration and rebound force of the probe rod in a single hammering; When the amount of soil penetration of the probe rod by a single hammering is less than the preset value of sinking and the rebound force is greater than the preset value of elastic force, it is preliminarily determined that the head of the probe rod touches the power jacking pipe, and after obtaining and recording the position of the probe and the value of the meter, step S4 is executed; when the depth of the probe exceeds the preset value of the depth, and the amount of soil penetration of the probe rod by a single hammering is greater than the preset value of sinking or the rebound force is less than the preset value of elastic force, step S3 is executed; S3: after the probe rod and the meter counter are horizontally moved by a preset adjustment value along the first drilling point, step S2 is executed; S4: placing the audio vibrator probe close to the electric jacking pipe bundle in the working wellhead, hammering the probe rod with a second preset hammering force, obtaining an audio signal of each pipe bundle, and finally judging whether the probe rod head touches the electric jacking pipe according to the obtained multiple audio signals; If it is determined that the head of the probe rod touches the power jacking pipe, the probe rod is pulled out, the first drilling point is re-determined and steps S1 to S4 are performed until all the marking points on the power jacking path are detected; If it is determined that the head of the probe rod does not touch the power jacking pipe, the probe rod is pulled out, and step S3 is performed based on the pulled-out position of the probe rod.

2. A method for detecting electric pipe jacking according to claim 1, characterized in that: There are multiple probes at the output end of the audio vibrator, and each probe is electrically connected to the audio vibrator respectively.

3. The method for detecting electric pipe jacking according to claim 1, characterized in that: The range of horizontally moving the probe rod and the meter along the first probe point is within 2 m on both sides of the first probe point perpendicular to the marking direction of the power pipe jacking path.

4. A method for detecting electric pipe jacking according to claim 3, characterized in that: The preset adjustment value is 200 mm to 500 mm.

5. The method for detecting electric pipe jacking according to claim 1, characterized in that: The method of finally judging whether the head of the probe rod touches the power jacking pipe based on the obtained multiple audio signals is specifically: finally judging whether the head of the probe rod touches the power jacking pipe based on the audio intensity or timbre in the multiple audio signals.

6. An electric power pipe jacking detection probe rod used in the electric power pipe jacking detection method according to any one of claims 1 to 5, characterized in that: At least three steel bars are evenly arranged along the circumference of the probe rod, and the steel bars and the probe rod are integrally formed.

7. The electric power pipe jacking detection probe according to claim 6, characterized in that: The probe rod is divided into multiple sections, and two adjacent sections of the probe rod are threadedly connected at the connecting end; And the steel bars on the circumference of each section of the probe rod can be butted after each section of the probe rod is butted.

8. The electric power pipe jacking detection probe according to claim 7, characterized in that: The probe rod is round steel or a special probe for archaeology.

9. The electric power pipe jacking detection probe according to claim 8, characterized in that: The number of the steel bars on the circumference is four.

10. The electric power pipe jacking detection probe according to claim 9, characterized in that: The steel bar is arranged along the axial direction of the probe rod.

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