Karst tunnel face water pressure actual measurement device

Abstract

The utility model relates to the technical field of water pressure testing, in particular to a karst tunnel face water pressure actual measurement device which comprises an advanced probe hole formed in a karst tunnel face. The drainage pipe is arranged in the advanced manhole in an extending manner; the drainage pipe is sleeved with one or more inflation capsules, inflation pipes are connected to the inflation capsules, the far ends of the inflation pipes extend to the outside from the outer end of the advanced detection hole and are connected with inflation equipment, and the inflation equipment can inflate the inflation capsules through the inflation pipes so that the inflation capsules can be expanded. The inflatable capsule is sealed between the outer peripheral surface of the drainage pipe and the inner peripheral wall of the advanced manhole; the outer end of the drainage pipe is connected with an installation pipe, the installation pipe is located outside the outer end face of the advanced probe hole, and a pressure gauge, an electromagnetic flowmeter and a valve are installed on the installation pipe. The utility model has the characteristics that the water pressure and the water flow can be simultaneously measured more quickly, and the monitoring accuracy can be better improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pressure test technical field especially relates to a karst tunnel face water pressure measuring device. BACKGROUND

[0002] Karst tunnel construction faces many challenges in karst geological environment. During construction, when encountering water-rich sections, advanced horizontal drilling is often needed to assess the risk of water gushing from the front face. When drilling or deepening the blast hole reveals high water pressure, it may cause sudden high-pressure water gushing, which not only has high pressure, but also has long jet distance, fast flow rate, and large water volume, posing a significant threat to the safety of the construction site. If not handled in time, it may lead to flooding of the construction area, project stagnation, and even impact the overall project schedule. In addition, this situation also poses a threat to the safety of construction personnel and equipment. Therefore, it is necessary to quickly and accurately calculate the water pressure and water volume of possible high-pressure water gushing in the tunnel to provide support for quick decision-making of drainage, grouting, and water pumping schemes, ensure timely and effective measures are taken, and reduce construction risks. In addition, the water pressure value of the face measured on site can also be used to review and correct the measured external water pressure value obtained during the survey phase.

[0003] The existing device for face water pressure measurement has the following disadvantages: 1. It cannot quickly measure water pressure and flow rate simultaneously; 2. There may be gravel and silt in the advanced exploration hole, which can easily block the water inlet of the monitoring equipment and affect monitoring accuracy; 3. The existing device is relatively complex and inconvenient to use.

[0004] Therefore, how to design a karst tunnel face water pressure measuring device with a simpler and more reasonable structure, which can measure water pressure and flow rate more quickly and improve monitoring accuracy, has become a technical problem to be solved. UTILITY MODEL CONTENT

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is how to design a karst tunnel face water pressure measuring device with a simpler and more reasonable structure, which can measure water pressure and flow rate more quickly and improve monitoring accuracy.

[0006] In order to achieve the above object, the utility model provides a kind of karst tunnel face water pressure real measuring device, including the advanced hole of being arranged on karst tunnel face;Its characterized in that;Still include the drain pipe for being arranged in the advanced hole of being inserted;One or more than one inflatable capsule is sleeved on drain pipe, inflatable capsule is connected with inflation tube, inflation tube distal end extends to outside from the outer end of advanced hole and is connected with inflation equipment, and inflation equipment can be inflated to inflatable capsule by inflation tube to make inflatable capsule swell, and inflatable capsule is formed between the outer peripheral surface of drain pipe and the inner peripheral wall of advanced hole Sealing;And installation pipe is connected and arranged on the outer end of drain pipe, and installation pipe is located outside the outer end surface of advanced hole, pressure gauge, electromagnetic flowmeter and valve are arranged on installation pipe.

[0007] In this way, the device described above is used, drain pipe is inserted into the advanced hole of face, inflation equipment is operated to inflate inflatable capsule sleeved on the outside of drain pipe through inflation tube, inflatable capsule is inflated, and inflatable capsule is sealed between the outer peripheral surface of drain pipe and the inner peripheral wall of advanced hole after inflation;So that the water in the advanced hole can flow out from drain pipe, and the pressure and flow can be monitored by pressure gauge, electromagnetic flowmeter and valve arranged on installation pipe.The whole structure of the device described above is more simple and reasonable, and the pressure and flow can be tested simultaneously.

[0008] As optimization, the diameter of drain pipe is greater than the diameter of installation pipe, and the inner diameter of drain pipe is greater than the inner diameter of installation pipe.

[0009] In this way, the structure design of drain pipe and installation pipe is more reasonable.

[0010] As optimization, two inflatable capsules are arranged on drain pipe at intervals, and inflatable capsule is connected with inflation equipment through inflation tube.

[0011] In this way, two inflatable capsules are arranged at intervals, and the sealing effect can be improved.

[0012] As optimization, limiting sleeve is arranged on drain pipe and corresponds to the inner end of inflatable capsule, and the outer end surface of limiting sleeve is designed as concave spherical surface structure;Limiting nut is arranged on the inner end of limiting sleeve to limit the axial inward movement of limiting sleeve on drain pipe.

[0013] In this way, by setting limiting sleeve, the position of inflatable capsule on drain pipe can be limited by limiting sleeve, so that it is more convenient to use, and the distance between two inflatable capsules and the position of inflatable capsule to the inner and outer ends of drain pipe can be relatively constrained, and the sealing effect is better improved.

[0014] As optimization, the outer end of the drain pipe extends to outside of the outer end face of the advanced probe hole, and a stabilizing sleeve is sleeved at the outer end of the drain pipe, the stabilizing sleeve comprises a stabilizing sleeve inner segment at the inner end, which is designed as a frustum in whole and is provided with a small inner end diameter and a large outer end diameter, the inner end of the stabilizing sleeve inner segment can be inserted into the outer end of the advanced probe hole, and the stabilizing sleeve further comprises a stabilizing sleeve shoulder segment at the outer end; and a displacement slot is arranged on the outer circumferential surface of the stabilizing sleeve and is axially and throughly arranged to pass the inflation pipe.

[0015] In this way, by arranging the stabilizing sleeve, one end of the stabilizing sleeve can be inserted into the inner end of the advanced probe hole, so that the outer end of the drain pipe can be better constrained, and the drain pipe can be better coaxial with the advanced probe hole to avoid deflection.

[0016] As optimization, the distance between the inner end of the drain pipe and the inner end face of the advanced probe hole is 50 to 100 cm.

[0017] In this way, the distance between the inner end of the drain pipe and the inner end face of the advanced probe hole is more reasonable.

[0018] As optimization, a filter cover is arranged at the inner end of the drain pipe, which is designed as a circular box structure in whole and is open at the outer end, the filter cover is connected at the inner end of the drain pipe, the inner end face of the filter cover is outwardly convex and is designed as a spherical surface structure, and a plurality of filter holes are arranged on the inner end face of the filter cover.

[0019] In this way, by arranging the filter cover, the mud and gravel can be prevented from entering the drain pipe, the influence of the gravel and mud on the monitoring can be avoided, and the accuracy of the monitoring can be improved. In addition, the structure of the filter cover is more reasonable.

[0020] Further, the filter hole is designed as a conical hole structure with a small inner end diameter and a large outer end diameter.

[0021] In this way, the structure of the filter hole is more reasonable, and the filter hole can be better prevented from being blocked.

[0022] Further, the filter cover comprises a connecting pipe segment at the outer end, the connecting pipe segment is sleeved at the inner end of the drain pipe, a plurality of screw holes are arranged on the connecting pipe segment and are uniformly distributed in the circumferential direction, a locking screw is arranged in the screw hole, and the inner end of the locking screw can abut against and support on the outer circumferential surface of the drain pipe.

[0023] In this way, the whole structure of the filter cover is more reasonable, and the filter cover can be more conveniently disassembled and assembled.

[0024] As optimization, the advanced probe hole is arranged horizontally in whole.

[0025] In this way, the arrangement of the advanced probe hole is more reasonable.

[0026] In summary, the karst tunnel face water pressure measuring device has the characteristics of simple and reasonable structure design, can measure water pressure and water flow more quickly, and can improve the monitoring accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of a karst tunnel face water pressure measuring device in the embodiment of the present application.

[0028] Figure 2 is Figure 1 a local enlarged schematic view of position A in the middle.

[0029] Figure 3 is Figure 1 a local enlarged schematic view of position B in the middle. DETAILED DESCRIPTION

[0030] The present application will be further described below in conjunction with the drawings and examples, and it should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular way, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] As Figures 1 to 3 shown, a karst tunnel face water pressure measuring device, comprising a leading hole 1 arranged on the karst tunnel face; further comprising a drainage pipe 2 arranged in the leading hole; one or more than one inflatable capsule 3 is sleeved on the drainage pipe, an inflation pipe 4 is connected to the inflatable capsule, the distal end of the inflation pipe extends to the outside from the outer end of the leading hole and is connected to an inflation device 5, and the inflation device can inflate the inflatable capsule through the inflation pipe to make the inflatable capsule expand and form a seal between the outer peripheral surface of the drainage pipe and the inner peripheral wall of the leading hole; and a mounting pipe 6 is connected and arranged at the outer end of the drainage pipe, and the mounting pipe is located outside the outer end surface of the leading hole, a pressure gauge 7, an electromagnetic flowmeter 8 and a valve 9 are arranged and mounted on the mounting pipe.

[0032] Thus, in use, the device described above is inserted into the advance hole on the working face, and the inflation device inflates the inflatable capsule through the inflation pipe, so that the inflatable capsule expands and forms a seal between the outer peripheral surface of the drainage pipe and the inner peripheral wall of the advance hole. Thus, the water in the advance hole can flow out of the drainage pipe, and the pressure and flow rate can be monitored through the pressure gauge, electromagnetic flowmeter and valve arranged on the mounting pipe. The device described above has a simple and reasonable structure, and can simultaneously test the pressure and flow rate.

[0033] In this embodiment, the diameter of the drainage pipe is greater than the diameter of the mounting pipe, and the inner diameter of the drainage pipe is greater than the inner diameter of the mounting pipe.

[0034] Thus, the structure of the drainage pipe and the mounting pipe is more reasonable.

[0035] In this embodiment, two inflatable capsules are arranged on the drainage pipe at intervals, and each inflatable capsule is connected to the inflation device through the inflation pipe.

[0036] Thus, arranging two inflatable capsules at intervals can improve the sealing effect.

[0037] In this embodiment, a limiting sleeve 10 is arranged on the drainage pipe and corresponds to the inner end of each inflatable capsule, and the outer end surface of the limiting sleeve is designed as a concave spherical surface. A limiting nut 11 is arranged at the inner end of each limiting sleeve to limit the axial inward movement of the limiting sleeve on the drainage pipe.

[0038] Thus, by arranging the limiting sleeve, the position of the inflatable capsule on the drainage pipe can be limited by the limiting sleeve, which makes it more convenient to use, and the spacing between the two inflatable capsules and the position of the inflatable capsule to the inner and outer ends of the drainage pipe can be relatively constrained, thereby better improving the sealing effect.

[0039] In this embodiment, the outer end of the drainage pipe extends to the outside of the outer end surface of the advance hole, and a stabilizing sleeve 12 is arranged on the outer end of the drainage pipe. The stabilizing sleeve includes a stabilizing sleeve inner segment 13 at the inner end, which is designed as a frustum and has a small inner diameter and a large outer diameter. The inner end of the stabilizing sleeve inner segment can be inserted into the outer end of the advance hole. The stabilizing sleeve also includes a stabilizing sleeve shoulder segment 14 at the outer end. An accommodation groove is arranged on the outer peripheral surface of the stabilizing sleeve and extends axially to accommodate the inflation pipe.

[0040] Thus, by arranging the stabilizing sleeve, one end of the stabilizing sleeve can be inserted into the inner end of the outer end of the advance hole, which can better constrain the outer end of the drainage pipe and better make the drainage pipe coaxial with the advance hole, thereby avoiding deflection.

[0041] In the embodiment, the distance between the inner end of the drain pipe and the inner end face of the advanced hole is 50 to 100 cm.

[0042] In this way, the distance from the inner end of the drain pipe to the inner end face of the advanced hole is more reasonably designed.

[0043] In the embodiment, a filter cover 15 in a circular box structure is arranged at the inner end of the drain pipe, the outer end of the filter cover is connected to the inner end of the drain pipe, the inner end face of the filter cover is outwardly convex and in a spherical structure, and a plurality of filter holes 16 are arranged on the inner end face of the filter cover.

[0044] In this way, by designing the filter cover, the silt and gravel can be prevented from entering the drain pipe, the influence of the gravel and silt on the monitoring is avoided, and the accuracy of the monitoring is improved. In addition, the structure of the filter cover is more reasonable.

[0045] Further, the filter hole is a conical hole structure with a smaller inner end diameter and a larger outer end diameter.

[0046] In this way, the structure of the filter hole is more reasonable, and the filter hole is better prevented from being blocked.

[0047] Further, the filter cover includes a connecting pipe segment 17 at the outer end, the connecting pipe segment is sleeved on the inner end of the drain pipe, a plurality of screw holes are uniformly distributed in the circumferential direction on the connecting pipe segment, locking screws 18 are arranged in the screw holes, and the inner ends of the locking screws can be abutted and supported on the outer circumferential surface of the drain pipe.

[0048] In this way, the entire structure of the filter cover is more reasonable, and the filter cover is more convenient to disassemble and assemble.

[0049] In the embodiment, the advanced hole is arranged horizontally.

[0050] In this way, the arrangement of the advanced hole is more reasonable.

[0051] In summary, the karst tunnel face water pressure measuring device has the characteristics of a more simple and reasonable structure, can more quickly measure the water pressure and flow, and can better improve the monitoring accuracy.

[0052] The preferred embodiments of the utility model are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the utility model. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the utility model shall be within the protection scope defined by the claims.

Claims

1. A karst tunnel face water pressure measuring device, comprising an advanced probe hole arranged on a karst tunnel face; characterized in that; The drainage pipe is arranged to extend into the advanced probe hole; one or more than one inflatable capsule is sleeved on the drainage pipe, an inflation pipe is connected to the inflatable capsule, a distal end of the inflation pipe extends to the outside from an outer end of the advanced probe hole and is connected to an inflation device, the inflation device is capable of inflating the inflatable capsule through the inflation pipe to make the inflatable capsule expand, and the inflatable capsule forms a seal between an outer peripheral surface of the drainage pipe and an inner peripheral wall of the advanced probe hole; and a mounting pipe is arranged at the outer end of the drainage pipe and is located outside an outer end surface of the advanced probe hole, a pressure gauge, an electromagnetic flowmeter and a valve are arranged on the mounting pipe.

2. The karst tunnel face water pressure measuring device according to claim 1, characterized in that: The diameter of the drainage pipe is greater than that of the mounting pipe, and the inner diameter of the drainage pipe is greater than that of the mounting pipe.

3. The karst tunnel face water pressure measuring device according to claim 1, characterized in that: Two inflatable capsules are arranged on the drainage pipe at intervals, and each inflatable capsule is connected to the inflation device through the inflation pipe.

4. The karst tunnel face water pressure measuring device according to claim 3, characterized in that: A limiting sleeve is arranged at the outer end of each inflatable capsule on the drainage pipe, and an outer end surface of the limiting sleeve is designed as a concave spherical surface structure; a limiting nut is arranged at an inner end of each limiting sleeve to limit the axial inward movement of the limiting sleeve on the drainage pipe.

5. The karst tunnel face water pressure measuring device according to claim 1, characterized in that: The outer end of the drainage pipe extends to the outside of the outer end surface of the advanced probe hole, and a stabilizing sleeve is sleeved on the outer end of the drainage pipe, the stabilizing sleeve includes a stabilizing sleeve inner segment at the inner end, which is designed as a frustum and has a small inner diameter and a large outer diameter, the inner end of the stabilizing sleeve inner segment can be inserted into the outer end of the advanced probe hole, the stabilizing sleeve further includes a stabilizing sleeve shoulder segment at the outer end; and an accommodation groove is arranged on an outer peripheral surface of the stabilizing sleeve and extends axially to accommodate the inflation pipe.

6. The karst tunnel face water pressure measuring device according to claim 1, characterized in that: The distance between the inner end of the drainage pipe and the inner end surface of the advanced probe hole is 50 to 100 cm.

7. The karst tunnel face water pressure measuring device according to claim 1, characterized in that: A filter cover is arranged at the inner end of the drainage pipe, which is designed as a circular box body structure and has an open outer end, the filter cover is connected to the inner end of the drainage pipe, an outer end surface of the filter cover is designed as a spherical surface structure, and a plurality of filter holes are arranged on the outer end surface of the filter cover.

8. The karst tunnel face water pressure measuring device according to claim 1, characterized in that: The advanced probe hole is arranged horizontally.

Images