Temporary protection device for tunnel inverted arch long core sample hole

Abstract

The utility model provides a tunnel inverted arch long core sample hole temporary protection device, and belongs to the field of tunnel construction. According to the technical scheme, the device comprises a side wall plugging steel cylinder matched with a sample hole, a canopy-shaped plugging top cover is arranged at the top of the side wall plugging steel cylinder, and a position indicator lamp is arranged on the plugging top cover. The device has the advantages that the device is used for replacing core sample hole protection measures in the existing tunnel inverted arch coring process, the top of a core sample can be effectively covered and protected within the time interval waiting for witness, side wall holes of a core sample drill bit can be effectively blocked, and the position of the core sample can be effectively marked. The device can avoid the problems that foreign matters enter holes in the side wall of a drill bit, a core is broken due to rolling of vehicles, slurry flows back and deposits, the position is difficult to find, and the holes are blocked after sampling, and ensures that drilling sampling detection and depth measurement are carried out smoothly and reliably. And after the detection is completed, plugging and retention can be continued for reinspection.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a temporary protection device for a long core sample hole of a tunnel invert. Background Art

[0002] Concrete strength core sampling test is the most authentic and effective test method. In high-speed railway tunnel projects, according to the "High-speed Railway Tunnel Project Construction Quality Acceptance Standard" TB10753-2018, the invert (bottom plate) and filling parts should be physically tested, and the concrete should be dense without voids and debris. The number of inspections is to check the core at least once every 120m, and two survey lines at the bottom of the tunnel by geological radar. Witness or parallel inspection. The detection method is to use the geological radar method to detect thickness and density, and the coring method to detect strength, thickness and density. Coring position: centered (if there is a central ditch, deviate from the central ditch by 1m) and not less than 1m away from the construction joint. After the invert coring is completed, the extraction of long core samples and the measurement of drilling depth need to be completed. At present, the general drilling depth of tunnel invert core samples is 1.5m-2.0m. The extraction of long core samples needs to be complete, and there should be no residue or foreign matter in the hole, which is convenient for later inspection of core sample length and drilling depth measurement comparison. After sampling, it is usually necessary to wait for the supervision, level inspection unit or inspection unit to witness the extraction, and coring cannot be performed immediately. After the core drilling is completed, it is necessary to promptly and effectively protect the borehole to prevent foreign objects from entering the pores on the side wall of the drill bit, which may cause the core sample to be unable to be extracted normally and require rework and re-drilling. In addition, there are many large vehicles going back and forth during tunnel construction. Improper protection of the drilling position is prone to fracture in the core sample hole due to vehicle rolling. In addition, there is a lot of mud on the surface during tunnel construction, and it is difficult to find the surface coverage of the drilling position. In order to avoid the entry of foreign objects, vehicle rolling, difficulty in finding and mud deposition after core drilling, which lead to various issues that lead to unsuccessful detection, effective core sample hole protection is imminent. The commonly used protection measures currently include geotextile plugging, anti-collision barrel isolation, and personnel monitoring. However, due to interference from various factors such as on-site machinery and equipment and construction personnel, plugging, anti-collision position offset, damage, and loss occur, resulting in poor results.

[0003] In summary, the protection of the core hole during the core sampling and testing of the tunnel invert is very critical, which directly affects the smoothness and reliability of the testing process. However, there are still various problems with the commonly used protection measures, which need to be optimized and improved. To this end, we proposed a temporary protection device for the long core sample hole of the tunnel invert. Utility Model Content

[0004] The utility model aims to provide a temporary protection device for a tunnel invert long core sample hole which is simple to operate and can effectively protect the tunnel invert long core sample hole.

[0005] The utility model is achieved through the following measures:

[0006] A temporary protection device for a long core sample hole of a tunnel invert arch, characterized in that it comprises a side wall blocking steel cylinder matched with the sample hole, an umbrella-shaped blocking top cover is arranged on the top of the side wall blocking steel cylinder, and a position indicator light is arranged on the blocking top cover;

[0007] The side wall plugging steel cylinder is made of φ107mm, δ3.5mm steel pipe (using a waste drill bit to cut the same size), the cylinder body height is 150mm, the non-verticality is ≤1°, and the surface is galvanized for rust prevention;

[0008] The blocking top cover is made of δ10mm high-strength steel plate, with a diameter of 147mm, a top height of 10mm, and a smooth arc shape.

[0009] The specific features of the utility model also include:

[0010] A rubber sealing buffer gasket is arranged on the periphery of the side wall sealing steel cylinder below the sealing top cover. The rubber sealing buffer gasket is a hard rubber ring with an outer diameter of 147mm, an inner diameter of 107mm and a thickness of 10mm. The surface is required to be smooth and the specifications are neat. The thickness of the gasket can be adjusted cumulatively according to the height required on site.

[0011] The blocking top cover is provided with a top tension ring and a groove cooperating with the top tension ring. The top tension ring is made of a steel ring with dimensions of 36mm in diameter and 3mm in delta, and is placed outward with the top position of the blocking top cover as the axis; the groove is engraved on the arc-shaped outer surface of the blocking top cover and has a depth of 3mm. The position and size of the groove coincide with the position of the top tension ring. The top tension ring is connected to the blocking top cover by a movable pin rod. When not in use, the top tension ring is placed in the groove to prevent the top tension ring from being crushed by heavy vehicles. When in use, it is rotated upward and pulled up, and the device can be lifted by the top tension ring.

[0012] The surface of the blocking top cover is provided with a reflective mark, and the reflective mark is a pasted reflective sticker or a painted reflective paint.

[0013] The position indicator light is a small LED lamp bead embedded in the groove and flashing red light.

[0014] A storage mechanism used in conjunction with the protection device is also provided;

[0015] The storage mechanism comprises a pair of symmetrically arranged U-shaped frames, and a plurality of groups of vertically arranged supporting mechanisms are arranged between the U-shaped frames on both sides, and a plurality of the protective devices are placed on the supporting mechanisms.

[0016] The supporting mechanism includes a pair of cross bars, which are respectively arranged between two corresponding side edges of the U-shaped frames on both sides. Slide grooves are arranged on the opposite inner side surfaces of the cross bars on both sides. A long rod is slidably arranged between the slide grooves on both sides. Several groups of annular support members are arranged on the long rod, and the protective device is placed in the annular support members.

[0017] The length of the slide groove is at least the length of the outer diameter of the two annular support members, so that the two upper and lower protective devices can be staggered to facilitate removal or storage.

[0018] The application method of the protection device is as follows:

[0019] The first step is to clean the stains around the drill hole until the surface is dry after coring is completed.

[0020] The second step is to apply a layer of grease release agent around the periphery and place the rubber closed buffer gasket. If the core sample has bulges, multiple rubber closed buffer gaskets can be placed according to the height of the bulges.

[0021] The third step is to place the side wall sealing steel cylinder inside the drill hole, press the sealing top cover, rotate it for one circle to compact it, and then turn on the position indicator light.

[0022] The fourth step is to search for a location based on the reflective mark and the position indicator light when coring is required.

[0023] The fifth step is to find the device and remove the surrounding silt and stains, turn it lightly for one circle, pull up the top tension ring, slowly pull out the device to carry out sampling and measurement, and after sampling is completed, whether to protect it is determined according to needs.

[0024] The beneficial effects of the utility model are as follows: the purpose of the utility model is to provide a temporary protection device for a long core sample hole of a tunnel invert, which replaces the current protection measures for the core sample hole during the coring process of the tunnel invert, and can effectively cover and protect the top of the core sample, seal the pores on the side wall of the core sample drill bit, and mark the position of the core sample during the waiting time interval. The device can avoid the problems of foreign matter entering the pores on the side wall of the drill bit, breaking the core due to vehicle rolling, mud backflow deposition, difficulty in finding the position, and blockage of the hole after sampling, and ensure that the sampling detection and depth measurement of the drilling hole are carried out smoothly and reliably. After the detection is completed, the plugging and retention can continue for re-inspection and re-examination.

[0025] In addition, the utility model also has the following beneficial effects:

[0026] (1) The utility model has a simple structure, is easy to process and manufacture, has high strength, can be used repeatedly for a long time, and saves costs.

[0027] (2) The utility model can effectively protect the core sample hole by bearing the top force.

[0028] (3) The utility model adds a position indicator light to help find the core sample position in complex environments.

[0029] (4) The utility model can use waste drill bits as the side wall plugging steel cylinder, the plugging size is more consistent, and the plugging effect is good.

[0030] (5) The utility model is provided with a rubber sealing buffer gasket, which can be used for drilling hole sealing in different environments.

[0031] (6) The utility model is easy to carry and protect, and is less susceptible to interference from external environmental factors.

[0032] (7) The utility model is waterproof, mud-proof, and resistant to external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0034] Figure 2 It is a schematic cross-sectional structural diagram of an embodiment of the utility model.

[0035] Figure 3 It is a schematic diagram of a storage mechanism equipped with a protective device in an embodiment of the utility model.

[0036] Figure 4 It is a schematic diagram of the overall structure of the storage mechanism in the embodiment of the utility model.

[0037] Among them, the figure markings are: 1. Side wall sealing steel cylinder; 2. Rubber sealing buffer gasket; 3. Sealing top cover; 4. Position indicator light; 5. Groove; 6. Top tension ring; 7. U-shaped frame; 8. Cross bar; 9. Slide groove; 10. Long rod; 11. Ring support. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0039] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0041] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0042] See also Figure 1-4 A temporary protection device for a long core sample hole of a tunnel invert arch comprises a side wall plugging steel cylinder 1 matched with the sample hole, an umbrella-shaped plugging top cover 3 is arranged on the top of the side wall plugging steel cylinder 1, and a position indicator light 4 is arranged on the plugging top cover 3;

[0043] The side wall plugging steel cylinder 1 is made of φ107mm, δ3.5mm steel pipe (using a waste drill bit to cut the same size), the cylinder height is 150mm, the non-verticality is ≤1°, and the surface is galvanized for rust prevention;

[0044] The plugging cover 3 is made of δ10mm high-strength steel plate, with a diameter of 147mm, a top height of 10mm, and a smooth arc shape.

[0045] A rubber sealing buffer gasket 2 is arranged on the periphery of the side wall sealing steel cylinder 1 below the sealing top cover 3. The rubber sealing buffer gasket 2 is a hard rubber ring with an outer diameter of 147mm, an inner diameter of 107mm and a thickness of 10mm. The surface is required to be smooth and the specifications are neat. The thickness of the gasket can be cumulatively adjusted according to the height required on site.

[0046] The sealing top cover 3 is provided with a top tension ring 6 and a groove 5 matched with the top tension ring 6. The top tension ring 6 is made of a steel ring with dimensions of 36mm in diameter and 3mm in delta, and is placed outward with the top position of the sealing top cover 3 as the axis; the groove 5 is engraved on the arc-shaped outer surface of the sealing top cover 3 and has a depth of 3mm. The position and size of the groove 5 coincide with the position of the top tension ring 6. The top tension ring 6 is connected to the sealing top cover 3 by a movable pin rod. When not in use, the top tension ring 6 is placed in the groove 5 to prevent the top tension ring 6 from being crushed by heavy vehicles. When in use, it is rotated upward and pulled up, and the device can be lifted by the top tension ring 6.

[0047] The surface of the blocking top cover 3 is provided with a reflective mark, which is a pasted reflective sticker or a painted reflective paint.

[0048] The position indicator light 4 is a small LED lamp bead embedded in the groove 5 and flashing red light.

[0049] A storage mechanism is also provided for use in conjunction with the protective device;

[0050] The storage mechanism comprises a pair of symmetrically arranged U-shaped frames 7, and a plurality of groups of vertically arranged supporting mechanisms are arranged between the U-shaped frames 7 on both sides, and a plurality of protective devices are placed on the supporting mechanisms.

[0051] The supporting mechanism includes a pair of cross bars 8, which are respectively arranged between the two corresponding side edges of the U-shaped frames 7 on both sides. Slide grooves 9 are arranged on the opposite inner sides of the cross bars 8 on both sides. A long rod 10 is slidably arranged between the slide grooves 9 on both sides. Several groups of annular support members 11 are arranged on the long rod 10, and a protective device is placed in the annular support member 11.

[0052] The length of the slide groove 9 is at least the length of the outer diameter of the two annular support members 11, so that the upper and lower protective devices can be staggered for easy removal or storage.

[0053] The application method of the protection device is as follows:

[0054] The first step is to clean the stains around the drill hole until the surface is dry after coring is completed.

[0055] The second step is to apply a layer of grease release agent around the periphery and place a rubber closed buffer gasket 2. If the core sample has bulges, multiple rubber closed buffer gaskets 2 can be placed according to the height of the bulge.

[0056] The third step is to place the side wall plugging steel cylinder 1 inside the drill hole, press the plugging top cover 3, rotate it for one circle to compact it, and then turn on the position indicator light 4.

[0057] The fourth step is to find the location according to the reflective mark and the position indicator light 4 when coring is needed.

[0058] The fifth step is to find the device and remove the surrounding silt and stains, turn it slightly for a circle, pull up the top tension ring 6, slowly pull out the device and perform sampling and measurement. After sampling, whether to perform protection is determined according to needs.

[0059] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A temporary protection device for a long core sample hole of a tunnel invert, characterized in that: It comprises a side wall blocking steel cylinder (1) matched with the sample hole, the top of the side wall blocking steel cylinder (1) is provided with an umbrella-shaped blocking top cover (3), and the blocking top cover (3) is provided with a position indicator light (4).

2. The temporary protection device for long core sample holes of tunnel inverts according to claim 1 is characterized in that: A rubber sealing buffer gasket (2) is arranged on the periphery of the side wall sealing steel cylinder (1) below the sealing top cover (3).

3. The temporary protection device for long core sample holes of tunnel inverts according to claim 1 is characterized in that: The blocking top cover (3) is provided with a top tension ring (6) and a notch (5) matched with the top tension ring (6).

4. The temporary protection device for long core sample holes of tunnel inverts according to claim 1 is characterized in that: The surface of the blocking top cover (3) is provided with a reflective mark.

5. The temporary protection device for long core sample holes of tunnel inverts according to claim 3 is characterized in that: The position indicator light (4) is a small LED lamp bead embedded in the groove (5) and flashing red light.

6. The temporary protection device for long core sample holes of tunnel inverts according to claim 1, characterized in that: A storage mechanism used in conjunction with the protection device is also provided; The storage mechanism comprises a pair of symmetrically arranged U-shaped frames (7), and a plurality of groups of vertically arranged supporting mechanisms are arranged between the U-shaped frames (7) on both sides, and a plurality of the protective devices are placed on the supporting mechanisms.

7. The temporary protection device for long core sample holes of tunnel inverts according to claim 6 is characterized in that: The support mechanism comprises a pair of cross bars (8), the pair of cross bars (8) are respectively arranged between two corresponding side edges of the U-shaped frames (7) on both sides, and sliding grooves (9) are arranged on the opposite inner sides of the cross bars (8) on both sides, and a long rod (10) is slidably arranged between the sliding grooves (9) on both sides, and a plurality of groups of annular support members (11) are arranged on the long rod (10), and the protective device is placed in the annular support member (11).

8. The temporary protection device for long core sample holes of tunnel inverts according to claim 7, characterized in that: The length of the slide groove (9) is at least the length of the outer diameters of the two annular support members (11).

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