Measurement range adjustable type stratum refined monitoring device and measurement range adjustable type stratum refined monitoring method

Abstract

The invention discloses a range-adjustable stratum refined monitoring device and method, the device is installed and fixed in a measured stratum through a supporting installation baffle, a wire spool is arranged on the supporting installation baffle, and ground subsidence monitoring is carried out by lowering a plurality of optical cables wound on the wire spool into a drill hole of the measured stratum. A plurality of optical cables can be put down at the same time, and settlement of strata at different depths can be monitored at the same time; the optical cable is placed in the corrugated hose, the corrugated hose has good ductility and stretchability, the corrugated hose can be better coupled with a soil body, and the specific depth of ground subsidence can be monitored more accurately; an optical cable is wound through the wire spool and is pressed and fixed through the optical cable pressing block, when ground settlement is about to exceed the measuring range of the optical cable, the optical cable pressing block is loosened, the wire spool rotates under the action of the tensile force of the optical cable, the optical cable wound on the wire spool is put down into a drill hole, and the optical cable is fixed after putting down is completed, so that it can be guaranteed that the optical cable has enough measuring range; the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of ground subsidence monitoring, and in particular relates to a range-adjustable stratum fine-tuning monitoring device and method. Background Art

[0002] Land subsidence is a phenomenon of ground sinking caused by the combined effects of the earth's structure and human engineering activities. It poses a huge threat to the safety of surface and underground structures and has attracted widespread attention from the international community.

[0003] Land subsidence caused by human engineering activities mainly includes excessive exploitation of groundwater, oil and gas resources, solid minerals, etc. For coastal areas, land subsidence may induce seawater backflow, leading to land salinization, failure of port facilities and other serious consequences. With the acceleration of urbanization and excessive exploitation and utilization of underground resources, land subsidence disasters are increasing, seriously affecting urban road safety and restricting the advancement of urbanization.

[0004] At present, the main monitoring methods for ground subsidence monitoring include photogrammetry (such as GPS and INSAR technology), leveling, bedrock markers and stratification tables. Photogrammetry is mainly suitable for some areas with large undulations and complex terrain, and is not suitable for the refined monitoring of local uneven subsidence on urban ground. Although leveling, bedrock markers and stratification tables can complete the subsidence monitoring of the surface or shallow loose layers, they have problems such as low automation, low monitoring density and high cost.

[0005] The existing technology is difficult to lay optical fiber directly in the rock and soil for settlement monitoring in deeper layers. The survival rate of the sensing optical fiber during the lowering process and the coupling ability with the rock and soil are poor, and it is impossible to monitor the settlement of rock and soil at different levels, which reduces the test accuracy of settlement monitoring for deeper rock and soil. At the same time, after the optical fiber is lowered into the borehole, as the ground settlement increases, the optical cable will be damaged due to exceeding the range, and eventually the optical cable will fail and cannot be monitored for a long time. Summary of the invention

[0006] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a range-adjustable formation fine-tuning monitoring device and method.

[0007] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0008] A range-adjustable formation fine-tuning monitoring device is provided, which is installed and fixed in the measured formation through a supporting mounting baffle. A winding drum is provided on the supporting mounting baffle. Ground subsidence monitoring is performed by lowering the optical cable wound on the winding drum into the borehole of the measured formation. A plurality of optical cables are provided, with the same or different lengths.

[0009] Furthermore, the winding drum is arranged on the supporting mounting baffle through a winding drum mounting seat.

[0010] Furthermore, a thread is provided on one side of the support mounting baffle, which is used to fix the winding drum mounting seat to the support mounting baffle through the winding drum mounting seat screws.

[0011] Furthermore, a thread is provided at the center of the cable winding reel mounting seat for fixing the cable winding reel to the cable winding reel mounting seat via a cable winding reel mounting screw, and a bearing is provided inside the cable winding reel to facilitate the winding and lowering of the optical cable.

[0012] Furthermore, the cable winding drum mounting seat is also provided with threads for fixing the optical cable pressing block to the cable winding drum mounting seat via the optical cable pressing block mounting screws.

[0013] Furthermore, a thread is provided at the center of the support mounting baffle for installing and fixing a corrugated hose connector. The corrugated hose connector has threads for connecting a corrugated hose. A plurality of optical cables are provided inside the corrugated hose.

[0014] Furthermore, the corrugated hose has two sections, and both ends of each section of the corrugated hose are provided with corrugated hose connectors. The two sections of the corrugated hose are connected to the connecting seat through threads on the corrugated hose connectors, and the two sections of the corrugated hose are arranged in sequence from top to bottom.

[0015] Furthermore, two optical cables are arranged inside the corrugated hose, including a first optical cable and a second optical cable. The first optical cable starts from a first optical cable fixing hole on the connecting seat and goes upward, is wound on the winding drum for multiple turns, and is then pressed and fixed by an optical cable pressing block. The second optical cable starts from a second optical cable fixing hole on the guide hammer and goes upward, is wound on the winding drum for multiple turns, and is then pressed and fixed by an optical cable pressing block.

[0016] Furthermore, the tail end of the first optical cable is installed and fixed in the first optical cable fixing hole on the connecting seat by glue, and the top end passes through the corrugated hose and is wound around the winding reel for multiple turns, and is pressed and fixed by the optical cable pressing block; the tail end of the second optical cable is installed and fixed in the second optical cable fixing hole on the guide hammer by glue, and the top end passes through two corrugated hoses and is wound around the winding reel for multiple turns, and is pressed and fixed by the optical cable pressing block.

[0017] The present invention also discloses a range-adjustable formation fine monitoring method, which uses the range-adjustable formation fine monitoring device as described above to perform monitoring, and includes the following steps:

[0018] Step 1: Drill a required borehole in the stratum to be measured;

[0019] Step 2: lowering the above-mentioned formation fine monitoring device with adjustable range from the guide hammer into the borehole;

[0020] Step 3: After the guide hammer is lowered to the bottom, use clay balls to backfill the drill hole;

[0021] Step 4: After the drilling backfill is completed, install the support mounting baffle at the drilling opening and fix it;

[0022] Step 5: After the device is lowered and installed, ground settlement monitoring can be started. During the measurement process, if the settlement distance exceeds the strain limit of the optical cable, the range of the first optical cable and the second optical cable is adjusted by loosening the installation screws of the optical cable clamp. After tightening the installation screws of the optical cable clamp and pressing and fixing the optical cable, ground settlement monitoring can continue.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1) The present invention discloses a range-adjustable formation fine monitoring device and method, which can simultaneously lower multiple optical cables and simultaneously monitor the settlement of formations at different depths, thereby facilitating the acquisition of the settlement law of the entire formation and providing reliable and safe data support for subsequent operations;

[0025] 2) The present invention discloses a range-adjustable stratum fine monitoring device and method, in which an optical cable is placed in a corrugated hose and lowered. The corrugated hose has good ductility and stretchability, can be better coupled with the soil, and more accurately monitor the specific depth of ground settlement;

[0026] 3) The present invention discloses a range-adjustable formation fine-tuning monitoring device and method. The optical cable is wound on a winding drum and fixed by a cable pressing block. When the ground settlement is about to exceed the range of the optical cable, the cable pressing block is released. Under the action of the cable tension, the winding drum will rotate and the optical cable wound on the winding drum will be lowered into the borehole. After the lowering is completed, the optical cable is fixed. This can ensure that the optical cable has a sufficient range and increase its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the installation of a range-adjustable formation fine monitoring device of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a range-adjustable formation fine monitoring device of the present invention;

[0029] Figure 3 It is a cross-sectional view of a range-adjustable formation fine monitoring device of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the connecting socket of the present invention; wherein, Figure 4a is a schematic diagram of the structure of the connecting seat. Figure 4 b is Figure 4 AA section view of a;

[0031] Figure 5 It is a schematic diagram of the structure of the guide hammer of the present invention; wherein, Figure 5 a is a schematic diagram of the structure of the guide hammer. Figure 5 b is Figure 5 AA section view of a;

[0032] Wherein: 1-range adjustable formation fine monitoring device; 2-measured formation; 3-drill hole; 11-winding drum; 12-optical cable pressure block; 13-support mounting baffle; 14-corrugated hose; 15-connecting seat; 16-guide hammer; 17-winding drum mounting screw; 18-first optical cable; 19-second optical cable; 110-optical cable pressure block mounting screw; 111-winding drum mounting seat; 112-corrugated hose connector; 113-winding drum mounting seat screw; 151-corrugated hose connector mounting thread; 152-second optical cable through hole; 153: first optical cable fixing hole; 161-corrugated hose connector mounting thread; 162-second optical cable fixing hole. DETAILED DESCRIPTION

[0033] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0035] like Figure 1-5As shown, the present invention discloses a range-adjustable formation fine monitoring device 1, including a support and installation baffle 13. The support and installation baffle 13 is mainly used to install and fix the entire range-adjustable formation fine monitoring device 1 in the measured formation 2 to ensure that it does not slip. A thread is set on one side of the support and installation baffle 13, which is used to fix the winding drum mounting seat 111 to the support and installation baffle 13 through the winding drum mounting seat screw 113. The support and installation baffle 13 is provided with a thread in the center, which is used to install and fix the corrugated hose connector 112. The center of the winding drum mounting seat 111 is provided with a thread, which is used to fix the winding drum 11 to the winding drum mounting seat 111 through the winding drum mounting screw 17. The winding drum 11 has a bearing inside to facilitate the winding and lowering of the optical cable. The winding drum mounting seat 111 is also provided with a thread, which is used to fix the optical cable block through the optical cable block mounting screw 110. 12 is fixed to the winding drum mounting seat 111, and the corrugated hose connector 112 has threads for connecting the corrugated hose 14. The corrugated hose 14 has several sections, and each section of the corrugated hose 14 is provided with corrugated hose connectors 112 at both ends. The corrugated hose 14 is connected to the connecting seat 15 through the threads on the corrugated hose connector 112, and the tail end of the corrugated hose 14 at the bottom is fixed to the guide hammer 16 through the threads on the corrugated hose connector 112. Several optical cables are arranged inside the corrugated hose 14, and the optical cable 18 is wound around the winding drum 11 for several turns and then pressed and fixed by the optical cable pressing block 12. During the use of the optical cable, if the optical cable range is insufficient due to excessive settlement distance, the range of the optical cable can be adjusted by loosening the optical cable pressing block mounting screws 110 and the optical cable pressing block 12.

[0036] The present invention also discloses a range-adjustable formation fine monitoring method, which uses the range-adjustable formation fine monitoring device 1 as described above to perform monitoring, and includes the following steps:

[0037] Step 1: Drill a required borehole 3 in the measured stratum 2;

[0038] Step 2: lowering the range-adjustable formation fine monitoring device 1 from the guide hammer 16 into the borehole 3;

[0039] Step 3: After the guide hammer 16 is lowered to the bottom, clay balls are used for backfilling to fill the borehole 3 completely;

[0040] Step 4: After the backfilling of the drilling hole is completed, the support mounting baffle 13 is installed at the drilling hole opening and fixed;

[0041] Step 5: After the device is lowered and installed, monitoring can begin. During the measurement process, if the settlement distance exceeds the strain limit of the optical cable, it is necessary to loosen the optical cable clamp mounting screws 110 and the optical cable clamp 12, loosen the optical cable, and let it fall freely. The range of the optical cable can be adjusted by loosening the optical cable clamp mounting screws 110 and the optical cable clamp 12. After the adjustment is completed, tighten the optical cable clamp mounting screws 110, and fix the optical cable with the optical cable clamp 12 to continue ground settlement monitoring. Through the above steps, long-term monitoring of ground settlement can be achieved. Different optical cables are customized to different lengths according to customer needs, and can monitor the settlement of soil layers at different depths at the same time, improving the accuracy, diversity and rapid responsiveness of ground settlement. Since the starting point of the optical cable is on the road surface, the measured value is the settlement value.

[0042] Example 1

[0043] like Figure 1-5 As shown, a range-adjustable formation fine monitoring device 1 includes a supporting and mounting baffle 13, and the supporting and mounting baffle 13 is mainly used to install and fix the entire range-adjustable formation fine monitoring device 1 in the measured formation 2 to ensure that it does not slip. A thread is provided on one side of the support mounting baffle 13 for fixing the cable reel mounting seat 111 to the support mounting baffle 13 through the cable reel mounting seat screw 113. A thread is provided in the center of the support mounting baffle 13 for installing and fixing the corrugated hose connector 112. A thread is provided in the center of the cable reel mounting seat 111 for fixing the cable reel 11 to the cable reel mounting seat 111 through the cable reel mounting screw 17. The cable reel 11 has a bearing inside to facilitate the winding and lowering of the optical cable. The cable reel mounting seat 111 is also provided with a thread for fixing the optical cable pressing block 12 to the cable reel mounting seat 111 through the optical cable pressing block mounting screw 110. The corrugated hose connector 112 is provided with a thread for connecting the corrugated hose 14. The corrugated hose 14 has two sections, each section Both ends of the corrugated hose 14 are provided with corrugated hose connectors 112, and the two sections of the corrugated hose 14 are connected to the connecting seat 15 through the threads on the corrugated hose connectors 112. The two sections of the corrugated hose 14 are placed in sequence from top to bottom, and the tail end of the corrugated hose 14 located at the bottom is fixed to the guide hammer 16 through the threads on the corrugated hose connector 112. Two optical cables are arranged inside the corrugated hose 14, including a first optical cable 18 and a second optical cable 19. The first optical cable 18 starts from the first optical cable fixing hole 153 on the connecting seat 15 and goes upward and is wound on the winding drum 11 for several turns, and then is pressed and fixed by the optical cable pressing block 12. The second optical cable 19 starts from the second optical cable fixing hole 162 on the guide hammer 16 and goes upward and is wound on the winding drum 11 for several turns, and then is pressed and fixed by the optical cable pressing block 12.

[0044] In this embodiment, the tail end of the first optical cable 18 is fixed to the first optical cable fixing hole 153 on the connecting seat 15 by glue, and the top end passes through the corrugated hose 14 and is wound several times on the winding drum 11, and is finally fixed by the optical cable pressing block 12; the tail end of the second optical cable 19 is fixed to the second optical cable fixing hole 162 on the guide hammer 16 by glue, and the top end passes through the second optical cable through hole 152 and the corrugated hose 14 and is wound several times on the winding drum 11, and is finally fixed by the optical cable pressing block 12. During the use of the first optical cable 18 and the second optical cable 19, if the optical cable range is insufficient due to excessive settlement distance, the range of the first optical cable 18 and the second optical cable 19 can be adjusted by loosening the optical cable pressing block mounting screws 110 and the optical cable pressing block 12, which can further increase the range. After the adjustment is completed and fixed, the ground settlement monitoring can be continued.

[0045] The supporting mounting baffle 13, the corrugated hose 14, the connecting seat 15, the corrugated hose connector 112, the screws (the cable winding drum mounting screws 17, the optical cable clamp mounting screws 110, the cable winding drum mounting seat screws 113), the guide hammer 16 and the cable winding drum mounting seat 111 are all made of 304 stainless steel, which is anti-corrosive and rust-proof, increases the service life, and provides reliable conditions for long-term monitoring.

[0046] The winding drum 11 is made of nylon 66, which is corrosion-resistant and rust-proof and has high strength. At the same time, the material is relatively soft and will not damage the optical cable wound thereon.

[0047] The optical cable pressing block 12 is made of rubber, which can compress the optical cable and protect it without damaging it.

[0048] The connecting seat 15 is provided with a corrugated hose connector mounting thread 151 which matches with the thread on the corrugated hose connector 112 and is used to realize the connection between the corrugated hose 14 and the connecting seat 15 .

[0049] The guide hammer 16 is provided with a corrugated hose connector mounting thread 161 which matches with the thread on the corrugated hose connector 112 and is used to realize the connection between the corrugated hose 14 and the guide hammer 16 .

[0050] A range-adjustable formation fine monitoring method, using the range-adjustable formation fine monitoring device 1 as described above for monitoring, comprises the following steps:

[0051] Step 1: Drill a required borehole 3 in the measured stratum 2;

[0052] Step 2: lowering the range-adjustable formation fine monitoring device 1 from the guide hammer 16 into the borehole 3;

[0053] Step 3: After the guide hammer 16 is lowered to the bottom, clay balls are used for backfilling to fill the borehole 3 completely;

[0054] Step 4: After the backfilling of the drilling hole is completed, the support mounting baffle 13 is installed at the drilling hole opening and fixed;

[0055] Step 5: After the device is lowered and installed, monitoring can be started. During the measurement process, if the settlement distance exceeds the strain limit of the optical cable, it is necessary to loosen the optical cable block mounting screws 110 and the optical cable block 12, loosen the optical cables (the first optical cable 18 and the second optical cable 19), and let them fall freely. By loosening the optical cable block mounting screws 110 and the optical cable block 12, the range of the first optical cable 18 and the second optical cable 19 can be adjusted. After the adjustment is completed, tighten the optical cable block mounting screws 110, and fix the first optical cable 18 and the second optical cable 19 by the optical cable block 12 to continue the ground settlement monitoring; through the above steps, the ground settlement can be monitored for a long time. The first optical cable 18 and the second optical cable 19 are customized to different lengths according to customer needs, and can monitor the settlement of soil layers at different depths at the same time, improving the accuracy, diversity and rapid response of ground settlement. Since the starting points of the first optical cable 18 and the second optical cable 19 are both on the road surface, the measured value is the settlement value.

[0056] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A range-adjustable formation fine monitoring device, characterized in that: The range-adjustable formation fine-tuning monitoring device is installed and fixed in the measured formation through a supporting mounting baffle, and a winding drum is provided on the supporting mounting baffle. Ground settlement monitoring is performed by lowering the optical cable wound on the winding drum into the borehole of the measured formation. A plurality of optical cables are provided, and the lengths may be the same or different.

2. The range-adjustable formation fine monitoring device according to claim 1 is characterized in that: The wire winding drum is arranged on the supporting installation baffle through a wire winding drum installation seat.

3. The range-adjustable formation fine monitoring device according to claim 2 is characterized in that: A thread is arranged on one side of the support and installation baffle plate, which is used to fix the winding drum installation seat to the support and installation baffle plate through the winding drum installation seat screw.

4. The range-adjustable formation fine monitoring device according to claim 2 is characterized in that: The center of the cable winding drum mounting seat is provided with a thread for fixing the cable winding drum to the cable winding drum mounting seat through the cable winding drum mounting screws. The cable winding drum is provided with a bearing inside to facilitate the winding and lowering of the optical cable.

5. The range-adjustable formation fine monitoring device according to claim 1 is characterized in that: The cable drum mounting seat is also provided with threads for fixing the optical cable pressing block to the cable drum mounting seat through the optical cable pressing block mounting screws.

6. The range-adjustable formation fine monitoring device according to claim 1 is characterized in that: The support and installation baffle is provided with a thread at the center for installing and fixing a corrugated hose connector. The corrugated hose connector is provided with a thread for connecting a corrugated hose. A plurality of optical cables are provided inside the corrugated hose.

7. The range-adjustable formation fine monitoring device according to claim 6 is characterized in that: The corrugated hose has two sections, and both ends of each section of the corrugated hose are provided with corrugated hose connectors. The two sections of the corrugated hose are connected to the connecting seat through the threads on the corrugated hose connectors. The two sections of the corrugated hose are arranged in sequence from top to bottom.

8. The range-adjustable formation fine monitoring device according to claim 6 is characterized in that: Two optical cables are arranged inside the corrugated hose, including a first optical cable and a second optical cable. The first optical cable starts from a first optical cable fixing hole on the connecting seat and goes upward, is wound on the winding drum for multiple turns, and is then pressed and fixed by an optical cable pressing block. The second optical cable starts from a second optical cable fixing hole on the guide hammer and goes upward, is wound on the winding drum for multiple turns, and is then pressed and fixed by an optical cable pressing block.

9. The range-adjustable formation fine monitoring device according to claim 8, characterized in that: The tail end of the first optical cable is installed and fixed in the first optical cable fixing hole on the connecting seat by glue, and the top end passes through the corrugated hose and is wound around the winding drum for multiple turns, and is pressed and fixed by the optical cable pressing block; the tail end of the second optical cable is installed and fixed in the second optical cable fixing hole on the guide hammer by glue, and the top end passes through two corrugated hoses and is wound around the winding drum for multiple turns, and is pressed and fixed by the optical cable pressing block.

10. A range-adjustable formation fine monitoring method, characterized in that: The monitoring is performed using a range-adjustable formation fine monitoring device as described in any one of claims 1 to 9, comprising the following steps: Step 1: Drill a required borehole in the stratum to be measured; Step 2: lowering the range-adjustable formation fine monitoring device described in any one of claims 1 to 9 from the guide hammer into the borehole; Step 3: After the guide hammer is lowered to the bottom, use clay balls to backfill the drill hole; Step 4: After the drilling backfill is completed, install the support mounting baffle at the drilling opening and fix it; Step 5: After the device is lowered and installed, ground settlement monitoring can be started. During the measurement process, if the settlement distance exceeds the strain limit of the optical cable, the range of the first optical cable and the second optical cable is adjusted by loosening the installation screws of the optical cable clamp. After tightening the installation screws of the optical cable clamp and pressing and fixing the optical cable, ground settlement monitoring can continue.

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