A device and method for burying a temperature sensor in deep soil

Abstract

The present invention provides a device and method for burying a temperature sensor in a deep soil body. The device includes: a tripod, a fixed pulley, a wire rope, a casing, a joint, a drilling rig, a temperature sensor positioning assembly and a vertical support rod. The temperature sensor positioning assembly includes a lifting ring, a lead harness hook, a vertical connecting pipe, a telescopic rod fixing sleeve, a telescopic rod and a fastener; the vertical support rod is assembled by threading a plurality of round tubes with the same inner and outer diameters. By setting the temperature sensor positioning assembly and the vertical support rod, the temperature sensor and the temperature sensor lead harness are accurately suspended in the borehole, so that when burying the temperature sensor in the deep soil body, each section of the casing can be quickly pulled out and removed, avoiding the need to pass the temperature sensor lead harness through the section of the casing and reposition the temperature sensor each time a section of the casing is removed, which not only improves the work efficiency, better protects the temperature sensor lead harness from wear, but also makes the buried position of the temperature sensor more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of building monitoring, and in particular relates to a device and a method for burying a temperature sensor in a deep soil body. Background Art

[0002] Permafrost is widely distributed in China, and the area affected by seasonal frozen soil and permafrost accounts for about 70% of China's total land area. Permafrost and seasonal frozen soil are widely distributed in the eastern region, northwest region and Qinghai-Tibet Plateau of my country. The two most prominent problems in frozen soil areas are the damage of foundation frost heave and melting subsidence, accompanied by the freeze-thaw disasters formed and evolved in the cold growth process that threaten the stability of the project. With the development of social economy, more and more infrastructure projects will inevitably involve permafrost or seasonal frozen soil in cold regions. At present, based on the distribution characteristics of the underground temperature field, the development and evolution trend of frozen soil can be inferred and the stability of buildings and structures can be assessed. Therefore, the monitoring data of deep soil temperature is of great significance to the construction of frozen soil projects in cold regions.

[0003] At present, the method of burying temperature sensors in deep soil is as follows: ① Use a drilling rig to drill a hole at the burial location, and put the casing into the borehole to protect the hole wall; ② Arrange all temperature sensors on the horizontal ground according to the predetermined burial depth, bundle the leads into a bundle and mark them, and then put them vertically into the borehole. After ensuring that each temperature sensor is buried in the correct position, fix the lead bundle to the top of the tripod; ③ Pull out and remove each section of the casing in turn; ④ Lay the lead to the predetermined position for protection, and backfill the borehole with fine sand. In the process of step ③ of this method, each time a section of the casing is pulled out and removed, it is necessary to loosen the lead bundle fixed to the top of the tripod, and then pass the lead bundle through the section of the casing, and reposition the buried position of the temperature sensor. After ensuring accuracy, fix the lead bundle to the top of the tripod again, and repeat the above operations until all the casings are pulled out and removed. Since the lead harness is relatively long and there are many sleeves, the lead harness is easily worn during the process of repeatedly passing through the sleeve, causing the temperature sensor to malfunction. In addition, the lead harness is repeatedly passed through the sleeve and repositioned, which is complicated and inefficient, seriously affecting the construction progress. If the hole collapses during the process of passing the lead harness through the sleeve, it is difficult to ensure the accuracy of the buried position of each temperature sensor because the lead harness is not fixed at this time. Summary of the invention

[0004] The present invention provides a device and method for burying a temperature sensor in deep soil, the purpose of which is to solve the problems of the existing burying method that during the process of removing a casing section, each time a casing section is removed, the temperature sensor lead bundle needs to be passed through the casing section and the temperature sensor needs to be repositioned, which easily causes wear on the temperature sensor lead wire, the operation is complicated and inefficient, the construction progress is slow, and the burying position of the temperature sensor is difficult to accurately locate.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for burying a temperature sensor in a deep soil body, characterized in that it comprises a tripod, a fixed pulley, a wire rope, a casing, a joint, a drilling rig, a temperature sensor positioning assembly and a vertical support rod; the fixed pulley is suspended at the top of the tripod; the temperature sensor positioning assembly, the vertical support rod and the casing exposed to the ground can be connected to the drilling rig by respectively passing the wire rope around the fixed pulley; the casing is connected in a threaded manner; the temperature sensor positioning assembly is connected to the vertical support rod in a threaded manner and stands upright in the casing; the temperature sensor positioning assembly comprises a lifting ring, a lead harness hook, a vertical connecting pipe, a telescopic rod fixing sleeve, a telescopic rod and a fastener; the lifting ring is connected to the top of the vertical connecting pipe; the lead harness hook is horizontally inserted into the vertical connecting pipe; the telescopic rod fixing sleeve is vertically connected to the vertical connecting pipe in a cross shape in the same horizontal plane; the telescopic rod is inserted into the telescopic rod fixing sleeve and fixed with the fastener; the vertical support rod is assembled by a plurality of round tubes with the same inner and outer diameters through threaded connection.

[0007] Furthermore, the vertical connecting tube has a plurality of horizontally penetrating first through holes at equal intervals on the rod body between the lifting ring and the telescopic rod fixing sleeve, and the wire harness hook can be horizontally inserted and fixed into a suitable first through hole as required.

[0008] Furthermore, a second through hole is formed at the outer end of the telescopic rod fixing sleeve.

[0009] Furthermore, one end of the telescopic rod is provided with a row of third through holes extending longitudinally therethrough, and the other end is connected to a pressed-in steel ball roller, which can rotate 360 ​​degrees to reduce the friction between the telescopic rod and the sleeve.

[0010] Furthermore, the fastener passes through the second through hole of the telescopic rod fixing sleeve and any third through hole of the telescopic rod, so that the telescopic rod can be freely extended and retracted in the telescopic rod fixing sleeve.

[0011] Furthermore, the cross section of the lead harness hook is round on the top and square on the bottom, which can prevent it from rotating and avoid wearing the temperature sensor lead harness. One end of the hook is a 180-degree hook and the other end is a pin that can be locked with a cotter pin.

[0012] Furthermore, two symmetrical hooks are arranged near the top of the outer side of the circular tube, which can be connected to the wire rope or hung on the topmost sleeve.

[0013] The present invention also discloses a method for burying a temperature sensor in a deep soil body using the device described in the above technical solution, comprising the following steps:

[0014] S1: Arrange all temperature sensors on the horizontal ground according to the predetermined burial depth, bundle the temperature sensor leads into a bundle, and mark them;

[0015] S2: Set up a tripod, install a fixed pulley, use a drilling rig to drill a hole at a predetermined location to a designed depth, and insert a casing at the same time;

[0016] S3: Install the vertical support rod and the temperature sensor positioning assembly in place;

[0017] S4: vertically place the temperature sensor and the temperature sensor lead bundle into the casing, accurately locate the buried position of each temperature sensor, and then hang the temperature sensor lead bundle on the lead bundle hook and fix it;

[0018] S5: Pull out and remove all casings;

[0019] S6: Remove the temperature sensor lead harness from the lead harness hook and lay it to a predetermined position for protection;

[0020] S7: Pull out and remove the temperature sensor positioning assembly and the vertical support rod, and backfill the drill hole with fine sand.

[0021] Furthermore, after the vertical support rod and the temperature sensor positioning assembly are installed in place, the position of the lead harness hook is 0.5 to 1.0 m above the ground, which is convenient for later removal.

[0022] The beneficial effect of the present invention is that by setting a temperature sensor positioning component and a vertical support rod, the temperature sensor and the temperature sensor lead harness are accurately suspended in the borehole, so that when the temperature sensor is buried in deep soil, each section of the casing can be quickly pulled out and removed, avoiding the need to pass the temperature sensor lead harness through the section of the casing and reposition the temperature sensor each time a section of the casing is removed, which not only improves work efficiency and better protects the temperature sensor lead harness from wear and tear, but also makes the buried position of the temperature sensor more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a device for burying a temperature sensor in a deep soil body;

[0024] Figure 2 It is a schematic diagram of the casing thread connection;

[0025] Figure 3A schematic diagram of the threaded connection between the temperature sensor positioning assembly and the vertical support rod;

[0026] Figure 4 It is a structural schematic diagram of the temperature sensor positioning assembly and the vertical support rod;

[0027] Figure 5 It is a schematic diagram of round pipe thread connection;

[0028] Figure 6 a cutaway view of the assembly for positioning the temperature sensor;

[0029] Figure 7 for Figure 6 A partial enlarged view of

[0030] Figure 8 It is a schematic diagram of the structure of the lead harness hook;

[0031] Fig. 9 The present invention is a flow chart of a method for burying a temperature sensor in deep soil.

[0032] Description of reference numerals:

[0033] 1-tripod; 2-fixed pulley; 3-wire rope; 4-casing; 5-joint; 6-drilling rig; 7-temperature sensor positioning assembly; 71-lifting ring; 72-lead harness hook; 721-pin shaft; 722-split pin; 73-vertical connecting pipe; 731-first through hole; 74-telescopic rod fixing sleeve; 741 second through hole; 75-telescopic rod; 751-third through hole; 752-roller; 76-fastener; 8-vertical support rod; 81-round tube; 811-hook; 82-hoop; 9-temperature sensor; 10-temperature sensor lead harness; 11-soil. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1 The device for burying a temperature sensor in a deep soil layer as shown comprises a tripod 1, a fixed pulley 2, a steel wire rope 3, a casing 4, a joint 5, a drilling rig 6, a temperature sensor positioning assembly 7 and a vertical support rod 8; the fixed pulley 2 is suspended at the top of the tripod 1; the temperature sensor positioning assembly 7, the vertical support rod 8 and the casing 4 exposed to the ground can be connected to the drilling rig 6 by respectively passing the steel wire rope 3 around the fixed pulley 2; the casing 6 is connected in a threaded manner, and the threaded connection method is preferably as follows Figure 2 As shown; the temperature sensor positioning assembly 7 is connected to the vertical support rod 8 in a threaded manner and is upright in the sleeve 4. The threaded connection method is preferably as follows Figure 3 shown.

[0036] When in use, firstly, all temperature sensors 9 are arranged on the horizontal ground at a predetermined burial depth, the temperature sensor leads are bundled into a bundle and marked. In this embodiment, the lead length of the temperature sensor 9 is 30 to 50 m; secondly, a tripod 1 is set up, a fixed pulley 2 is installed, and a drilling rig 6 is used to drill a hole at a predetermined position to a designed depth, and a casing 4 is placed to protect the hole wall. In this embodiment, the drilling depth is 19.6 m, and a total of 10 casings 4 with a length of 2 m are placed; and the vertical support rods 8 and the temperature sensor 9 are again arranged. The temperature sensor positioning assembly 7 is installed in place, the temperature sensor 9 and the temperature sensor lead harness 10 are vertically placed in the sleeve 4, and after accurately locating the buried position of each temperature sensor 9, the temperature sensor lead harness 10 is hung on the lead harness hook 72 and fixed; then all the sleeves 4 are pulled out and removed, the temperature sensor lead harness 10 is removed from the lead harness hook 72 and laid to the predetermined position for protection; finally, the temperature sensor positioning assembly 7 and the vertical support rod 8 are pulled out and removed, and fine sand is backfilled in the drilled hole.

[0037] like Figure 4 As shown, the temperature sensor positioning assembly 7 includes a lifting ring 71, a wire harness hook 72, a vertical connecting tube 73, a telescopic rod fixing sleeve 74, a telescopic rod 75 and a fastener 76; the lifting ring 71 is connected to the top of the vertical connecting tube 73; the wire harness hook 72 is horizontally inserted into the vertical connecting tube 73; the telescopic rod fixing sleeve 74 is vertically connected to the vertical connecting tube 73 in a cross shape in the same horizontal plane; the telescopic rod 75 is inserted into the telescopic rod fixing sleeve 74 and fixed with the fastener 76; the vertical support rod 8 is assembled by threading a plurality of round tubes 81 with the same inner and outer diameters, and the threaded connection method is preferably as follows Figure 5 As shown, according to the drilling depth, it is determined that the vertical support rod 8 is preferably composed of 6 circular tubes 81 with a length of 3m and 1 circular tube 81 with a length of 2m. The circular tubes 81 are preferably made of stainless steel tubes. Two symmetrical hooks 811 are arranged near the top of the outer side of each circular tube 81, which can be connected to the wire rope 3 or hung on the topmost casing 4.

[0038] like Figures 6-7As shown, the vertical connecting tube 73 is provided with a plurality of horizontally penetrating first through holes 731 at equal intervals on the rod body between the lifting ring 71 and the telescopic rod fixing sleeve 74. The vertical connecting tube 73 is preferably 1 m long and has four horizontally penetrating first through holes 731. The lead harness hook 72 can be horizontally inserted and fixed by selecting a suitable first through hole 731 as needed, so that after the vertical support rod 8 and the temperature sensor positioning assembly 7 are installed in place, the position of the lead harness hook 72 is 0.5 to 1.0 m above the ground, which is convenient for later removal; the outer end of the telescopic rod fixing sleeve 74 is provided with a second through hole 741; one end of the telescopic rod 75 is longitudinally provided with A row of third through holes 751 is passed through, and the other end is connected to a pressed-in steel ball roller 752, and the roller 752 can rotate 360 ​​degrees to reduce the friction between the telescopic rod 75 and the sleeve 4; the fastener 76 passes through the second through hole 741 of the telescopic rod fixing sleeve 74 and any third through hole 751 of the telescopic rod 75, so that the telescopic rod 75 can be freely extended and retracted in the telescopic rod fixing sleeve 74, so that a gap of 1 to 2 cm is left between the roller 752 and the inner wall of the sleeve 4, which can ensure that the vertical support rod 8 and the temperature sensor positioning assembly 7 are always upright in the sleeve 4, thereby preventing the friction between the temperature sensor 9 and the temperature sensor lead harness 10 and the inner wall of the sleeve 4 when the sleeve 4 is pulled out.

[0039] like Figure 8 As shown, the cross section of the lead harness hook 72 is round on the top and square on the bottom, which can prevent it from rotating and avoid wearing the temperature sensor lead harness 10. One end of the hook is a 180-degree hook and the other end is a pin 721, which can be locked with a cotter pin 722.

[0040] When installing the vertical support rod 8 and the temperature sensor positioning assembly 7, the vertical support rod 8 and the temperature sensor positioning assembly 7 can be connected in sections on the horizontal ground in advance according to the height of the tripod 1. The length of each section is preferably about twice the height of the tripod 1. Then, the drilling rig 6 and the wire rope 3 are used to sequentially hoist each section into the casing 4 and connect until the bottom end of the vertical support rod 8 contacts the bottom of the drill hole. During the hoisting process, the connected part can be temporarily suspended on the inner wall of the topmost casing 4 using the hook 811, which facilitates the upward movement of the connection point between the wire rope 3 and the hook 811 and the connection between the sections.

[0041] When hanging the temperature sensor 9 and the temperature sensor lead harness 10 on the lead harness hook 72, first vertically place the temperature sensor 9 and the temperature sensor lead harness 10 into the sleeve 4, and then bend the temperature sensor lead harness 10 downward and droop after passing it around the lead harness hook 72. Adjust the position of the lower bending point of the temperature sensor lead harness 10, ensure that each temperature sensor 9 is buried in the correct position, and then use tape to wrap the temperature sensor lead harness 10 and fix it on the lead harness hook 72.

[0042] When pulling out the casing 4, first wrap one end of the wire rope 3 around the outer wall of the top section of the casing 4, and the other end passes around the fixed pulley 2 and is connected to the drilling rig 6. Then, use the drilling rig 6 to pull the section of casing 4 out of the ground and use a unscrewing tool to disassemble it. Repeat the above operation to pull out and remove the remaining casings 4 in turn.

[0043] After the temperature sensor lead harness 10 is removed from the lead harness hook 72 and laid to a predetermined position for protection, one end of the wire rope 3 is first connected to the hook 811 on the eye 71 or the round tube 81, and the other end is passed around the fixed pulley 2 and connected to the drilling rig 6. Then, the drilling rig 6 is used to pull out and remove the temperature sensor positioning assembly 7 and the vertical support rod 8 in sections. During the pulling out process, a metal pipe can be placed horizontally on the ground at the drilling position, and the vertical support rod 8 that has not been pulled out of the ground can be temporarily suspended on the metal pipe using the hook 811, so as to facilitate the removal of the temperature sensor positioning assembly 7 and the vertical support rod 8 that has been pulled out of the ground.

[0044] In order to solve the above technical problems, the present application example also provides a method for burying a temperature sensor in a deep soil body, as shown in the attached Fig. 9 As shown, the following steps are included:

[0045] S1: Arrange all temperature sensors 9 on the horizontal ground at a predetermined burial depth, bundle the temperature sensor leads into a bundle, and mark them;

[0046] S2: Setting up the tripod 1, installing the fixed pulley 2, drilling a hole at a predetermined position to a designed depth using a drilling machine 6, and inserting the casing 4 at the same time;

[0047] S3: Install the vertical support rod 8 and the temperature sensor positioning assembly 7 in place;

[0048] S4: vertically place the temperature sensor 9 and the temperature sensor lead wire bundle 10 into the sleeve 4, accurately locate the buried position of each temperature sensor 9, and then hang the temperature sensor lead wire bundle 10 on the lead wire bundle hook 72 and fix it;

[0049] S5: Pull out and remove all the sleeves 4;

[0050] S6: Remove the temperature sensor lead harness 10 from the lead harness hook 72 and lay it to a predetermined position for protection;

[0051] S7: Pull out and remove the temperature sensor positioning assembly 7 and the vertical support rod 8, and backfill the drill hole with fine sand.

[0052] Furthermore, after the vertical support rod 8 and the temperature sensor positioning assembly 7 are installed in place, the position of the lead harness hook 72 is 0.5 to 1.0 m above the ground, which is convenient for later removal.

[0053] It can be seen from the above embodiments that the present invention provides a device and method for burying a temperature sensor in deep soil. Compared with the prior art, the device and method of the present invention, by setting a temperature sensor positioning assembly and a vertical support rod, accurately suspends the temperature sensor and the temperature sensor lead bundle in the borehole, so that when the temperature sensor is buried in the deep soil, each section of the casing can be quickly pulled out and removed, avoiding the need to pass the temperature sensor lead bundle through the section of the casing and reposition the temperature sensor each time a section of the casing is removed. This not only improves work efficiency and better protects the temperature sensor lead bundle from wear, but also makes the buried position of the temperature sensor more accurate.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for burying a temperature sensor in deep soil, characterized in that: It includes a tripod, a fixed pulley, a wire rope, a casing, a joint, a drilling rig, a temperature sensor positioning assembly and a vertical support rod; the fixed pulley is suspended at the top of the tripod; the temperature sensor positioning assembly, the vertical support rod and the casing exposed to the ground can be connected to the drilling rig through the wire rope passing around the fixed pulley respectively; the casing is connected in a threaded manner; the temperature sensor positioning assembly is connected to the vertical support rod in a threaded manner and stands upright in the casing; the temperature sensor positioning assembly includes a lifting ring, a lead harness hook, a vertical connecting pipe, a telescopic rod fixing sleeve, a telescopic rod and a fastener; the lifting ring is connected to the top of the vertical connecting pipe; the lead harness hook is horizontally inserted into the vertical connecting pipe; The telescopic rod fixing sleeve is vertically connected to the vertical connecting tube in a cross shape in the same horizontal plane; the telescopic rod is inserted into the telescopic rod fixing sleeve and fixed with the fastener; the vertical support rod is assembled by multiple round tubes with the same inner and outer diameters through threaded connection; the vertical connecting tube is provided with a plurality of horizontally penetrating first through holes at equal intervals on the rod body between the lifting ring and the telescopic rod fixing sleeve, and the wire harness hook can be horizontally inserted and fixed by selecting a suitable first through hole as needed.

2. The device for burying a temperature sensor in deep soil according to claim 1, characterized in that: The outer end of the telescopic rod fixing sleeve is provided with a second through hole.

3. The device for burying a temperature sensor in deep soil according to claim 1, characterized in that: One end of the telescopic rod is provided with a row of third through holes extending longitudinally, and the other end is connected to a pressed-in steel ball roller, which can rotate 360 ​​degrees to reduce the friction between the telescopic rod and the sleeve.

4. The device for burying a temperature sensor in deep soil according to claim 1, characterized in that: The fastener passes through the second through hole of the telescopic rod fixing sleeve and any third through hole of the telescopic rod, so that the telescopic rod can be freely extended and retracted in the telescopic rod fixing sleeve.

5. The device for burying a temperature sensor in deep soil according to claim 1, characterized in that: The cross section of the lead harness hook is round on the top and square on the bottom, which can prevent it from rotating and avoid wearing the temperature sensor lead harness. One end of the hook is a 180-degree hook and the other end is a pin shaft, which can be locked with a split pin.

6. The device for burying a temperature sensor in deep soil according to claim 1, characterized in that: Two symmetrical hooks are arranged near the top of the outer side of the circular tube, which can be connected with the steel wire rope or hung on the sleeve at the top.

7. A method for burying a temperature sensor in a deep soil layer using the device according to any one of claims 1 to 6, comprising the following steps: S1: Arrange all temperature sensors on the horizontal ground according to the predetermined burial depth, bundle the temperature sensor leads into a bundle, and mark them; S2: Set up a tripod, install a fixed pulley, use a drilling rig to drill a hole at a predetermined location to a designed depth, and insert a casing at the same time; S3: Install the vertical support rod and the temperature sensor positioning assembly in place; S4: vertically place the temperature sensor and the temperature sensor lead bundle into the casing, accurately locate the buried position of each temperature sensor, and then hang the temperature sensor lead bundle on the lead bundle hook and fix it; S5: Pull out and remove all casings; S6: Remove the temperature sensor lead harness from the lead harness hook and lay it to a predetermined position for protection; S7: Pull out and remove the temperature sensor positioning assembly and the vertical support rod, and backfill the drilled hole with fine sand.

8. The method according to claim 7, characterized in that After the vertical support rod and the temperature sensor positioning assembly are installed in place, the position of the lead harness hook is 0.5 to 1.0 m above the ground, which is convenient for later removal.

Images