Device for accurately burying sensing element in drill hole

Abstract

The utility model discloses a device for accurately burying a sensing element in a drill hole, which comprises a first hollow steel pipe, one end of the first hollow steel pipe is welded with a hollow union, and the other end of the first hollow steel pipe is welded with a first hollow thread butt joint port; a first hollow thread butt-joint opening is welded to one end of the second hollow steel pipe, a second hollow thread butt-joint opening is welded to the other end of the second hollow steel pipe, and the first hollow steel pipe and the second hollow steel pipe are matched through the first hollow thread butt-joint opening and the second hollow thread butt-joint opening. And sensing elements are fixed on the side walls of the first hollow steel pipe and the second hollow steel pipe. According to the device, the procedure of burying the sensing element in the drill hole is simplified, the device has the advantages of being low in cost and easy to mount and dismount, in addition, the device can directly conduct cement mortar pouring operation, and the efficiency and precision of burying the sensing element in the drill hole are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of construction engineering monitoring technology, and relates to a device for accurately burying sensing elements in a borehole. BACKGROUND

[0002] In geotechnical engineering research and monitoring work, stress, liquid level, water content, temperature and other sensing elements are usually buried in the ground soil layer to obtain the change trend of specific parameters such as the physical mechanics of the ground soil layer. However, such research and monitoring work usually needs to be implemented in combination with drilling. When the drilling is shallow (less than 15m), the sensing elements are usually buried by the following methods: one is to backfill sand soil layer by layer and tamp, and then put the sensing elements into the hole and lead the data line out of the ground when backfilling to the expected depth, and continue to backfill and tamp the sand soil until all the sensors are buried; the second is to bind the sensors on the steel bars in advance, and then put the steel bars into the drilling hole by manpower or hoisting device, and then backfill the sand soil to complete the burial. However, when facing complex geological conditions or deep drilling, the conventional method is no longer applicable, and the burial and accurate positioning of the sensing elements often become a headache problem for researchers or monitoring personnel, especially in landslide, goaf and other geological disaster monitoring and early warning projects. The distortion of monitoring data or data falsification caused by the failure of the sensing elements to be successfully buried or the large deviation of the burial position will completely fail to ensure the accuracy and timeliness of the monitoring and early warning work, thereby causing significant loss of life and property, mainly in the following aspects:

[0003] ①When the geological conditions are complex, hole collapse, shrinkage and other situations often occur, which requires drilling hole cleaning operation. However, the hole cleaning operation often damages the buried sensing elements and data lines, resulting in failure of the sensing elements, and the buried sensing elements often cannot be retrieved and repaired, thereby increasing the cost of instruments and drilling operations;

[0004] ②In the implementation process of research or monitoring projects in permafrost regions, the underground water melted by drilling often freezes rapidly in the hole. When the burial speed is slow, the sensing elements are often not in place and difficult to retrieve, and the burial precision and quality are poor. After the natural thawing of permafrost in the later period, the position of the sensor will change, resulting in abnormal monitoring data;

[0005] ③When the drilling depth is large, such as when the drilling depth is 170m, additional cranes, welding personnel and power equipment are needed to bury the sensing elements. When drilling hole cleaning operation is performed in case of emergency during the burial process, the welded steel bars need to be cut again, and welding needs to be performed again during re-burial, which greatly increases the construction period and investment cost;

[0006] In the above several types of conditions, if further operation of pouring cement mortar in the hole is needed, at this time, pouring equipment and pipelines need to be equipped, which greatly increases the difficulty of burying and the probability of damage of sensing elements. Therefore, it is necessary to study a device and method capable of quickly and accurately burying sensing elements under complex geological conditions or deep drilling, especially capable of retrieving and repairing sensing elements and data lines during the burying process, and capable of performing cement mortar pouring operation after burying. Content of the utility model

[0007] The utility model discloses a device for accurately burying sensing elements in a hole, which solves the problems of difficult burying of sensing elements and difficult positioning in the prior art.

[0008] The utility model adopts the technical scheme, a device for accurately burying sensing elements in a hole, including first hollow steel pipe, first hollow steel pipe one end is welded with hollow oil den, and the other end is welded with first hollow screw butt joint, still include second hollow steel pipe, second hollow steel pipe one end is welded with first hollow screw butt joint, and the other end is welded with second hollow screw butt joint, and first hollow steel pipe and second hollow steel pipe pass through first hollow screw butt joint and second hollow screw butt joint cooperation, first hollow steel pipe and second hollow steel pipe lateral wall are fixed with sensing element.

[0009] The utility model discloses a device for accurately burying sensing elements in a hole, which solves the problems of difficult burying of sensing elements and difficult positioning in the prior art.

[0010] The sensing element is bound to the lateral wall of the first hollow steel pipe and the second hollow steel pipe.

[0011] The sensing element is welded to the lateral wall of the first hollow steel pipe and the second hollow steel pipe.

[0012] The length of the first hollow steel pipe and the second hollow steel pipe ranges from 5.0 to 8.0 m.

[0013] The first hollow screw butt joint is an outer hollow screw butt joint, and the second hollow screw butt joint is an inner hollow screw butt joint.

[0014] The first hollow screw butt joint is an inner hollow screw butt joint, and the second hollow screw butt joint is an outer hollow screw butt joint.

[0015] The hollow oil den has a large diameter at one end and a small diameter at the other end.

[0016] The large diameter of the hollow oil den is the same as the diameter of the drill rod, and the small diameter of the hollow oil den is the same as the diameter of the first hollow steel pipe.

[0017] The shape of the hollow oil den is a circular truncated cone or a horn.

[0018] The utility model discloses a device for accurately burying sensing elements in a hole, which solves the problems of difficult burying of sensing elements and difficult positioning in the prior art.

[0019] The utility model is suitable for the device of accurate buried sensing element in borehole, mainly aiming at a series of problems such as difficult to bury sensor in hole and difficult to accurately position when facing complex geological conditions or deeper drilling in scientific research and monitoring work, on the basis of fully utilizing conventional geological drilling equipment and its process, the accessory combination that can be docked with drilling machine, disassembled and can realize cement mortar grouting operation is designed, the construction process of buried sensing element in borehole is simplified, the burying precision and efficiency of sensing element are improved significantly, the quality of scientific research and monitoring work is guaranteed, and the additional investment cost brought by welding, power, hoisting equipment, grouting equipment and pipeline is saved.

[0020] For simplifying the process of buried sensing element in borehole and improving burying precision and efficiency, and achieving retrieving and repairing sensing element and data line in the burying process, and being capable of carrying out cement mortar grouting operation after burying. The auxiliary device and method for solving the problems of difficult to bury sensing element in borehole and difficult to accurately position and reducing burying difficulty are provided, which can simplify the burying process, have low cost, easy installation and disassembly, and can directly carry out cement mortar grouting operation and other advantages, so as to improve the efficiency and precision of buried sensing element in borehole. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the device structure schematic diagram for accurate buried sensing element in borehole.

[0022] In the drawing, 1. First hollow steel pipe;2. Hollow oil den;3. First hollow threaded butt joint;4. Second hollow steel pipe;5. Second hollow threaded butt joint;6. Sensing element. DETAILED DESCRIPTION

[0023] The utility model will be explained in detail below in combination with the drawings and specific embodiment.

[0024] The device for accurate buried sensing element in borehole, as shown in Figure 1 It includes first hollow steel pipe 1, first hollow steel pipe 1 one end welding has hollow oil den 2, the other end welding has first hollow threaded butt joint 3, still includes second hollow steel pipe 4, second hollow steel pipe 4 one end welding has first hollow threaded butt joint 3, the other end welding has second hollow threaded butt joint 5, first hollow steel pipe 1 with second hollow steel pipe 4 passes through first hollow threaded butt joint 3 and second hollow threaded butt joint 5 cooperation, first hollow steel pipe 1 and second hollow steel pipe 4 lateral wall fixed with sensing element 6.

[0025] Sensing element 6 is tied on the lateral wall of first hollow steel pipe 1 and second hollow steel pipe 4.

[0026] Sensing element 6 is welded on the lateral wall of first hollow steel pipe 1 and second hollow steel pipe 4.

[0027] The first hollow steel pipe 1 and the second hollow steel pipe 4 are the device connection and cement mortar conveying fittings for accurately burying the sensing element in the borehole, and are also the bearing fittings of the sensing element, the total length of which is slightly greater than the borehole depth, and the length range is 5.0-8.0m.

[0028] The first hollow threaded butt joint 3 is an outer hollow threaded butt joint, and the second hollow threaded butt joint 5 is an inner hollow threaded butt joint.

[0029] The first hollow threaded butt joint 3 is an inner hollow threaded butt joint, and the second hollow threaded butt joint 5 is an outer hollow threaded butt joint.

[0030] The hollow oil nipple 2 has one large-diameter end and one small-diameter end. The shape of the hollow oil nipple 2 is a circular truncated cone or a horn. The large-diameter end of the hollow oil nipple 2 is the same as the diameter of the drill pipe, and the small-diameter end of the hollow oil nipple 2 is the same as the diameter of the first hollow steel pipe 1, so as to ensure that the device for accurately burying the sensing element in the borehole is connected with the drilling rig transmission device, and the purpose of using the drilling rig transmission device is achieved.

[0031] Embodiment 1

[0032] The device for accurately burying the sensing element in the borehole, as shown in Figure 1 , comprises a first hollow steel pipe 1, the first hollow steel pipe 1 has a hollow oil nipple 2 welded at one end and a first hollow threaded butt joint 3 welded at the other end; further comprising a second hollow steel pipe 4, the second hollow steel pipe 4 has the first hollow threaded butt joint 3 welded at one end and a second hollow threaded butt joint 5 welded at the other end, the first hollow steel pipe 1 and the second hollow steel pipe 4 are matched through the first hollow threaded butt joint 3 and the second hollow threaded butt joint 5, and the first hollow steel pipe 1 and the second hollow steel pipe 4 have a sensing element 6 fixed on the side wall.

[0033] Embodiment 2

[0034] The device for accurately burying the sensing element in the borehole, as shown in Figure 1 , comprises a first hollow steel pipe 1, the first hollow steel pipe 1 has a hollow oil nipple 2 welded at one end and a first hollow threaded butt joint 3 welded at the other end; further comprising a second hollow steel pipe 4, the second hollow steel pipe 4 has the first hollow threaded butt joint 3 welded at one end and a second hollow threaded butt joint 5 welded at the other end, the first hollow steel pipe 1 and the second hollow steel pipe 4 are matched through the first hollow threaded butt joint 3 and the second hollow threaded butt joint 5, and the first hollow steel pipe 1 and the second hollow steel pipe 4 have a sensing element 6 fixed on the side wall.

[0035] The sensing element 6 is bound to the side wall of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0036] The first hollow steel pipe 1 and the second hollow steel pipe 4 are connecting and cement mortar conveying accessories of the device for accurately burying the sensing element in the borehole, and are also bearing accessories of the sensing element, and the total length of the pre-cutting is slightly greater than the borehole depth, and the length is 5.0 m.

[0037] The first hollow threaded butt joint 3 is an outer hollow threaded butt joint, and the second hollow threaded butt joint 5 is an inner hollow threaded butt joint.

[0038] The hollow oil nipple 2 has one end with a large diameter and the other end with a small diameter. The shape of the hollow oil nipple 2 is a circular truncated cone or a horn. The large diameter of the hollow oil nipple 2 is the same as the diameter of the drill pipe, and the small diameter of the hollow oil nipple 2 is the same as the diameter of the first hollow steel pipe 1, thereby ensuring that the device for accurately burying the sensing element in the borehole is connected to the drilling rig transmission device, and the purpose of using the drilling rig transmission device is achieved.

[0039] Example 3

[0040] The device for accurately burying the sensing element in the borehole, as shown in Figure 1 , comprises a first hollow steel pipe 1, the first hollow steel pipe 1 has a hollow oil nipple 2 welded at one end and a first hollow threaded butt joint 3 welded at the other end; and a second hollow steel pipe 4, the second hollow steel pipe 4 has a first hollow threaded butt joint 3 welded at one end and a second hollow threaded butt joint 5 welded at the other end, the first hollow steel pipe 1 and the second hollow steel pipe 4 are matched through the first hollow threaded butt joint 3 and the second hollow threaded butt joint 5, and the sensing element 6 is fixed on the side wall of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0041] The sensing element 6 is welded on the side wall of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0042] The first hollow steel pipe 1 and the second hollow steel pipe 4 are connecting and cement mortar conveying accessories of the device for accurately burying the sensing element in the borehole, and are also bearing accessories of the sensing element, and the total length of the pre-cutting is slightly greater than the borehole depth, and the length is 8.0 m.

[0043] The first hollow threaded butt joint 3 is an outer hollow threaded butt joint, and the second hollow threaded butt joint 5 is an inner hollow threaded butt joint.

[0044] The hollow oil nipple 2 has one end with a large diameter and the other end with a small diameter. The shape of the hollow oil nipple 2 is a circular truncated cone or a horn. The large diameter of the hollow oil nipple 2 is the same as the diameter of the drill pipe, and the small diameter of the hollow oil nipple 2 is the same as the diameter of the first hollow steel pipe 1, thereby ensuring that the device for accurately burying the sensing element in the borehole is connected to the drilling rig transmission device, and the purpose of using the drilling rig transmission device is achieved.

[0045] Example 4

[0046] The device for accurately burying the sensing element in the borehole, as shown inFigure 1 As shown, it includes a first hollow steel pipe 1, one end of which is welded with a hollow nut 2, and the other end is welded with a first hollow threaded interface 3; it also includes a second hollow steel pipe 4, one end of which is welded with the first hollow threaded interface 3, and the other end is welded with a second hollow threaded interface 5. The first hollow steel pipe 1 and the second hollow steel pipe 4 are connected by the first hollow threaded interface 3 and the second hollow threaded interface 5. Sensing elements 6 are fixed on the side walls of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0047] The sensing element 6 is tied to the side wall of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0048] The first hollow steel pipe 1 and the second hollow steel pipe 4 are device connections and cement mortar conveying accessories used for accurately embedding sensing elements in the borehole. They are also load-bearing accessories for the sensing elements. The total length of the pre-cut pipe is slightly greater than the borehole depth, and the length is 7.0m.

[0049] The first hollow threaded interface 3 is an internal hollow threaded interface, and the second hollow threaded interface 5 is an external hollow threaded interface.

[0050] The hollow oil ring 2 has a large diameter at one end and a small diameter at the other. The hollow oil ring 2 is shaped like a frustum or a trumpet. The large diameter of the hollow oil ring 2 is the same as the diameter of the drill pipe, and the small diameter of the hollow oil ring 2 is the same as the diameter of the first hollow steel pipe 1. This ensures that the device for accurately embedding the sensing element inside the borehole is connected to the drilling rig's transmission system, achieving the purpose of utilizing the drilling rig's transmission system.

[0051] Example 5

[0052] Devices for accurately embedding sensing elements within boreholes, such as Figure 1 As shown, it includes a first hollow steel pipe 1, one end of which is welded with a hollow nut 2, and the other end is welded with a first hollow threaded interface 3; it also includes a second hollow steel pipe 4, one end of which is welded with the first hollow threaded interface 3, and the other end is welded with a second hollow threaded interface 5. The first hollow steel pipe 1 and the second hollow steel pipe 4 are connected by the first hollow threaded interface 3 and the second hollow threaded interface 5. Sensing elements 6 are fixed on the side walls of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0053] The sensing element 6 is welded to the side wall of the first hollow steel pipe 1 and the second hollow steel pipe 4.

[0054] The first hollow steel pipe 1 and the second hollow steel pipe 4 are device connections and cement mortar conveying accessories used for accurately embedding sensing elements in the borehole. They are also load-bearing accessories for the sensing elements. The total length of the pre-cut pipe is slightly greater than the borehole depth, and the length is 6.0m.

[0055] The first hollow threaded butt joint 3 is an inner hollow threaded butt joint, and the second hollow threaded butt joint 5 is an outer hollow threaded butt joint.

[0056] The hollow oil nipple 2 has a large diameter at one end and a small diameter at the other end. The hollow oil nipple 2 is in the shape of a circular truncated cone or a horn. The large diameter of the hollow oil nipple 2 is the same as the diameter of the drill pipe, and the small diameter of the hollow oil nipple 2 is the same as the diameter of the first hollow steel pipe 1, thereby ensuring that the device for accurately burying a sensing element in a borehole is connected to the driving device of a drilling machine, and the purpose of using the driving device of the drilling machine is achieved.

[0057] Example 6

[0058] The device for accurately burying a sensing element in a borehole provided in Examples 1-5 is installed and used by using the following installation steps:

[0059] Step 1: Before the drilling machine performs a drilling operation, the first hollow steel pipe 1 and the second hollow steel pipe 4 with a total length slightly greater than the drilling depth, in the range of 5.0-8.0 m, are pre-cut;

[0060] Step 2: The hollow oil nipple 2 is welded to one end of the first hollow steel pipe 1, and the first hollow threaded butt joint 3 is welded to the other end of the first hollow steel pipe 1. The first hollow threaded butt joint 3 is welded to one end of the second hollow steel pipe 4, and the second hollow threaded butt joint 5 is welded to the other end of the second hollow steel pipe 4;

[0061] Step 3: According to the designed burial depth, the sensing element 6 is pre-fixed on the first hollow steel pipe 1 and the second hollow steel pipe 4 obtained in Step 2, thereby completing the preliminary preparation work of the device;

[0062] Step 4: After the drilling is completed, the first hollow steel pipe 1 and the second hollow steel pipe 4 are sequentially lowered into the borehole in the order from deep to shallow by using the driving device of the drilling machine, and the first hollow threaded butt joint 3 and the second hollow threaded butt joint 5 are screwed together, and the data lines are sequentially led out to the ground, thereby achieving accurate positioning of the sensor;

[0063] Step 5: After the first hollow steel pipe 1 and the second hollow steel pipe 4 are completely placed in the borehole, cement mortar is injected through the first hollow steel pipe 1 and the second hollow steel pipe 4 from the hollow oil nipple 2 by using the self-provided mud pump of the drilling machine, thereby completing the sensor burying work.

[0064] Example 7

[0065] The device for accurately burying a sensing element in a borehole provided in Examples 1-5 is installed and used by using the following installation steps:

[0066] When the hole cleaning operation is needed due to shrinkage or hole collapse during the embedding process, the device for accurately embedding the sensing element in the hole can use the drilling rig transmission device to sequentially take out the first hollow steel pipe 1 and the plurality of second hollow steel pipes 4 from the hole and perform threaded disassembly, and then the hole cleaning operation can be performed.

[0067] Embodiment 8

[0068] The device for accurately embedding the sensing element in the hole provided in Embodiments 1-5 is reinstalled as follows:

[0069] According to the installation operation method, the first hollow steel pipe 1 and the plurality of second hollow steel pipes 4 are sequentially lowered into the hole by using the drilling rig transmission device and are threadedly connected, and the reinstallation is completed.

[0070] The device for accurately embedding the sensing element in the hole provided by the utility model, installation and disassembly process makes full use of the drilling rig equipment and process characteristics, without additional provision of cranes, welding personnel, power equipment, pouring equipment and pipelines, saves the additional investment cost brought by such work; in the process of installation and disassembly, the main stressed components of the device are hollow steel pipes and threaded butt joints, and the sensing elements bound thereon are not directly affected by the drilling rig transmission force, thus improving the efficiency and precision of embedding the sensing element in the hole, greatly reducing the damage probability of the sensor and data line.

[0071] The device solves a series of problems caused by the difficulty in embedding the sensing element and the difficulty in accurate positioning under complex geological conditions or deep drilling conditions, significantly improves the efficiency and precision of embedding the sensor in the hole, and can realize the cement mortar pouring operation, guarantees the installation success rate and quality of the sensor, and greatly improves the production efficiency and work quality. In addition, the device also makes full use of the conventional geological drilling equipment and process, is suitable for the installation and embedding of various sensing elements such as stress, liquid level, water content and temperature, has many advantages such as wide application subject, high efficiency and applicability, economic rationality and the like.

Claims

1. Apparatus for accurately embedding a sensing element in a borehole, characterised in that, The utility model provides a kind of hollow steel pipe, including first hollow steel pipe (1), the first hollow steel pipe (1) one end welding has hollow oil snake (2), the other end welding has first hollow screw butt joint (3);Second hollow steel pipe (4) further includes, the second hollow steel pipe (4) one end welding has first hollow screw butt joint (3), the other end welding has second hollow screw butt joint (5), the first hollow steel pipe (1) with second hollow steel pipe (4) by first hollow screw butt joint (3) and second hollow screw butt joint (5) cooperation, the first hollow steel pipe (1) and second hollow steel pipe (4) side wall is fixed with sensing element (6).

2. The apparatus for accurately embedding a sensing element in a borehole according to claim 1, wherein, The sensing element (6) is tied on the side wall of the first hollow steel pipe (1) and the second hollow steel pipe (4).

3. The apparatus for accurately embedding a sensing element in a borehole according to claim 1, wherein, The sensing element (6) is welded on the side wall of the first hollow steel pipe (1) and the second hollow steel pipe (4).

4. The apparatus for accurately embedding a sensing element in a borehole according to claim 1, wherein, The length of the first hollow steel pipe (1) and the second hollow steel pipe (4) ranges from 5.0 to 8.0 m.

5. The apparatus for accurately embedding a sensing element in a borehole according to claim 1, wherein, The first hollow screw butt joint (3) is an outer hollow screw butt joint, and the second hollow screw butt joint (5) is an inner hollow screw butt joint.

6. The apparatus for accurately embedding a sensing element within a borehole of claim 1, wherein, The first hollow screw butt joint (3) is an inner hollow screw butt joint, and the second hollow screw butt joint (5) is an outer hollow screw butt joint.

7. The apparatus for accurately embedding a sensing element within a borehole of claim 1, wherein, The hollow oil snake (2) has a large diameter at one end and a small diameter at the other end.

8. The apparatus for accurately embedding a sensing element in a borehole according to claim 7, wherein, The large diameter of the hollow oil snake (2) is the same as the diameter of the drill pipe, and the small diameter of the hollow oil snake (2) is the same as the diameter of the first hollow steel pipe (1).

9. The apparatus for accurately embedding a sensing element in a borehole according to claim 7, wherein, The shape of the hollow oil snake (2) is a circular truncated cone or a horn.

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