Bottom-up grouting device for filling pipeline
By designing a bottom-up grouting device for filling pipelines, and utilizing one-way valves and multiple grout outlets to achieve bottom-up grouting, the problems of poor grouting quality and low construction efficiency in traditional grouting methods are solved, achieving efficient and economical grouting results.
Patent Information
- Application Number
- CN202520337785.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Traditional top-down grouting methods cannot accurately control the amount of cement grout injected, resulting in poor grouting quality, which may cause well wall dissolution and rock breakage. In addition, it is time-consuming, material-intensive, and has low construction efficiency.
Design a device for bottom-up grouting in a filling pipe. A high-pressure pump injects cement slurry into the annular gap between the filling pipe and the well wall of the geological drilling through the construction drill pipe. A one-way valve is used to prevent backflow, and multiple slurry outlet holes are set at the bottom of the filling pipe to evenly distribute the cement slurry, forming a bottom-up grouting process.
It improved the grouting quality, saved cement grout usage and construction time, reduced production costs, extended the service life of the filling pipes, and improved construction efficiency.
Smart Images
Figure CN223739364U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a grouting device, especially to a filling pipeline from bottom to top grouting device, belongs to the technical field of drilling hole wall pouring. BACKGROUND
[0002] Drilling is an important technical means of geological exploration and disaster control. In various engineering drilling construction at present, according to technical needs, it is necessary to carry out casing wall back grouting after casing down, so as to fix the casing and prevent water in the upper hole from entering the lower hole and quicksand collapse.
[0003] In the filling grouting process, the main task is to ensure the quality of well cementation and water stop, which is the key to ensure the quality and service life of the filling pipe project. If the quality of well cementation and water stop is poor, it will cause shallow water to enter the tunnel along the filling casing, resulting in well wall dissolution and rock crushing, which will lead to filling pipe sinking and other accidents. Therefore, during well cementation and water stop, the filling pipe should be placed in place, the cement slurry should be fully filled in the annular gap, and the quality of well cementation and water stop should be ensured. The traditional filling pipeline grouting method mainly continuously injects cement slurry from the drilling hole, and the cement slurry flows out of the ground naturally, as shown in the figure. Figure 3 This grouting method cannot accurately control the injection amount of cement slurry. If the injection amount is too small, there are many bubbles and voids in the cement slurry, the grouting amount between the casing and the hole wall is too small, and the voids cannot achieve the expected effect, thereby reducing the density of the cement slurry. The cement slurry will form a "bridge" phenomenon in the annular space formed by the well pipe and the drilling hole, which will reduce the grouting quality and the well cementation strength. If the injection amount is too large, the cement slurry may enter the casing through the bottom of the drilling hole, the drilling hole is scrapped, the construction complexity is improved, and the economic benefit is poor. Moreover, the traditional top-down grouting method is time-consuming and material-consuming, and the construction efficiency is low. SUMMARY
[0004] In order to overcome the shortcomings of the prior art, the utility model provides a filling pipeline from bottom to top grouting device.
[0005] The technical scheme adopted by the utility model is: a filling pipeline from bottom to top grouting device is designed for well wall pouring in geological drilling, which comprises a filling pipeline, a sealing plate and a reverse thread adapter. The filling pipeline is placed in the geological drilling, and an annular gap is left between them. The lower part of the filling pipeline is provided with a sealing plate to divide the inner cavity of the filling pipeline into two chambers. A grouting hole is formed on the pipe wall of the filling pipeline chamber below the sealing plate. The reverse thread adapter is arranged on the sealing plate and communicates with the inner cavities of the filling pipeline above and below the sealing plate. During grouting, the construction drill rod used for forming the geological drilling is connected with the reverse thread adapter, and then the cement slurry is injected into the annular gap between the filling pipeline and the well wall of the geological drilling through the high-pressure pump along the construction drill rod.
[0006] Further, the design also includes a one-way valve arranged in the filling pipe inner cavity below the sealing plate and installed on the reverse thread hand.
[0007] Further, the sealing plate is 20-40 cm away from the lower end of the filling pipe.
[0008] Further, a plurality of slurry outlet holes are arranged on the pipe wall of the chamber below the sealing plate in a circumferential direction.
[0009] Further, a plurality of slurry outlet holes are arranged on the pipe wall of the chamber below the sealing plate, each circle of slurry outlet holes is arranged at a different height in the axial direction of the filling pipe, and each circle of slurry outlet holes includes at least three slurry outlet holes arranged in an array in the circumferential direction of the filling pipe.
[0010] Further, the filling pipe is a metal pipe with a diameter of 377 mm, the outer diameter of the sealing plate is consistent with the inner diameter of the filling pipe, and the thickness of the sealing plate is consistent with the wall thickness of the filling pipe, both of which are 10 mm thick.
[0011] Further, the Φ73 mm drill rod is used as the construction drill rod, the middle part of the sealing plate is drilled by a lathe, and a reverse thread hand matched with the Φ73 mm drill rod is welded and installed in the hole.
[0012] Further, the lower part of the filling pipe is cut to have a door hole, and the door hole is welded and blocked by a steel plate after the sealing plate and the reverse thread hand are installed through the door hole.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] The utility model discloses a filling pipe fixing device for drilling construction, which is characterized by comprising a sealing plate, a filling pipe and a reverse thread hand.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] The utility model discloses a filling pipe fixing device for drilling construction, which is characterized by comprising a sealing plate, a filling pipe and a reverse thread hand. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 The present application is a schematic diagram of the structure.
[0019] Figure 2 The present application is a schematic diagram of the door hole of the filling pipeline.
[0020] Figure 3 The present application is a schematic diagram of the traditional filling pipeline grouting.
[0021] In the figure: 1, geological drilling; 2, filling pipeline; 3, sealing plate; 4, reverse thread connector; 5, grout outlet hole; 6, one-way valve; 7, door hole. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connection" are used, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0024] Embodiment 1
[0025] As Figure 1As shown in the figure, a filling pipe 2 from bottom to top grouting device for the wall of the geological drilling figure 1, which includes filling pipe 2, sealing plate 3 and reverse thread hand 4, the filling pipe 2 is placed in the geological drilling figure 1 after the forming of the geological drilling figure 1, leaving an annular gap between them, the lower part of the filling pipe 2 is provided with a sealing plate 3 to divide the inner cavity of the filling pipe 2 into two chambers, the slurry hole 5 is opened on the pipe wall of the filling pipe 2 below the sealing plate 3, the reverse thread hand 4 is arranged on the sealing plate 3 and communicates with the inner cavity of the filling pipe 2 above and below the sealing plate 3, during grouting, the construction drill rod used for forming the geological drilling figure 1 is connected with the reverse thread hand 4, then the cement slurry is injected along the construction drill rod through the high-pressure pump (not shown in the figure), and the cement slurry flows into the annular gap between the filling pipe 2 and the wall of the geological drilling figure 1 in sequence after passing through the reverse thread hand 4 and the lower chamber of the filling pipe 2.
[0026] After the construction of the geological drilling figure 1 is completed, the filling pipe (filling pipe 2) is placed in the drilled well, in order to ensure the quality of the wall and prolong the service life of the filling pipe 2, and ensure the normal use of the filling pipe 2, the embodiment adopts the self-lifting grouting process to stop water and fix the well after the filling pipe 2 is lowered, which can well fix and protect the filling pipe 2 and effectively delay the corrosion of the filling pipe 2, prolonging the service life of the wall pipe.
[0027] Embodiment 2
[0028] The embodiment is further optimized and refined on the basis of the grouting device structure of embodiment 1, specifically:
[0029] The filling pipe 2 from bottom to top grouting device described in the embodiment further comprises a one-way valve 6, the one-way valve 6 is arranged in the inner cavity of the filling pipe 2 below the sealing plate 3 and is installed on the reverse thread hand 4. The cement slurry is used as the pressure grouting pipe through the construction drill rod, is injected from the top of the drill hole through the one-way water stop valve, and then is reversed to the top of the drill hole for grouting. The contact between the filling pipe 2 below the circular steel plate and the upper part can only be through the one-way water stop valve. The structure is reliable and can prevent backflow.
[0030] Embodiment 3
[0031] The embodiment is further optimized and refined on the basis of the grouting device structure of embodiment 2, specifically:
[0032] The filling pipe 2 of the top-to-bottom grouting device in the embodiment is provided with a plurality of slurry outlets 5 on the pipe wall of the chamber below the sealing plate 3, each circle of slurry outlets 5 is located at different axial heights of the filling pipe 2, so as to facilitate discharging cement slurry from different depths into the annular gap between the filling pipe 2 and the borehole wall at the same time, and also facilitate fully discharging the cement slurry accumulated at the lower end of the filling pipe 2. Each circle of slurry outlets 5 includes at least three slurry outlets 5 arranged in a circumferential array of the filling pipe 2, so as to facilitate the cement slurry to flow upward along the annular gap between the filling pipe 2 and the borehole wall from the four sides of the filling pipe 2 at the same time after the cement slurry is accumulated at the lower end of the filling pipe 2, and to facilitate uniform pouring, so as to prevent the cement slurry from flowing upward along one side of the annular gap between the filling pipe 2 and the borehole wall, and to affect the grouting quality. In addition, the slurry outlets 5 of adjacent two circles of slurry outlets 5 can be staggered, on the one hand to ensure the structural strength of the lower end of the filling pipe 2 after the pipe wall is perforated, and on the other hand to make the cement slurry more evenly and comprehensively discharged from the four sides of the filling pipe 2 and flow upward along the annular gap between the filling pipe 2 and the borehole wall after the cement slurry is accumulated at the lower end of the filling pipe 2, so as to improve the efficiency and quality of well cementing and water stopping construction.
[0033] In the embodiment, the filling pipe 2 of the top-to-bottom grouting device is provided with a plurality of slurry outlets 5 on the pipe wall of the chamber below the sealing plate 3, so as to facilitate the cement slurry to flow upward along the annular gap between the filling pipe 2 and the borehole wall from the four sides of the filling pipe 2 at the same time after the cement slurry is accumulated at the lower end of the filling pipe 2, and to facilitate uniform pouring, so as to prevent the cement slurry from flowing upward along one side of the annular gap between the filling pipe 2 and the borehole wall, and to affect the grouting quality.
[0034] Embodiment 4
[0035] The embodiment is further optimization and refinement of the structure of the grouting device based on the embodiment 3, specifically:
[0036] The filling pipe 2 of the top-to-bottom grouting device in the embodiment is provided with a plurality of slurry outlets 5 on the pipe wall of the chamber below the sealing plate 3, each circle of slurry outlets 5 is located at different axial heights of the filling pipe 2, so as to facilitate discharging cement slurry from different depths into the annular gap between the filling pipe 2 and the borehole wall at the same time, and also facilitate fully discharging the cement slurry accumulated at the lower end of the filling pipe 2. Each circle of slurry outlets 5 includes at least three slurry outlets 5 arranged in a circumferential array of the filling pipe 2, so as to facilitate the cement slurry to flow upward along the annular gap between the filling pipe 2 and the borehole wall from the four sides of the filling pipe 2 at the same time after the cement slurry is accumulated at the lower end of the filling pipe 2, and to facilitate uniform pouring, so as to prevent the cement slurry from flowing upward along one side of the annular gap between the filling pipe 2 and the borehole wall, and to affect the grouting quality. In addition, the slurry outlets 5 of adjacent two circles of slurry outlets 5 can be staggered, on the one hand to ensure the structural strength of the lower end of the filling pipe 2 after the pipe wall is perforated, and on the other hand to make the cement slurry more evenly and comprehensively discharged from the four sides of the filling pipe 2 and flow upward along the annular gap between the filling pipe 2 and the borehole wall after the cement slurry is accumulated at the lower end of the filling pipe 2, so as to improve the efficiency and quality of well cementing and water stopping construction.
[0037] Embodiment 5
[0038] The embodiment is further optimization and refinement of the structure of the grouting device based on the embodiment 4, specifically:
[0039] The filling pipe 2 of the self-below-to-top grouting device described in the embodiment is a metal pipe with a diameter of 377 mm, the outer diameter of the sealing plate 3 is consistent with the inner diameter of the filling pipe 2, the thickness of the sealing plate 3 is consistent with the wall thickness of the filling pipe 2, and both are 10 mm thick. This is a specific use scheme of the applicant, and it can be understood that the filling pipe 2 and the like can also be other sizes.
[0040] In the embodiment, the construction drill rod is a Φ73 mm drill rod, the middle part of the sealing plate 3 is turned into a hole by a lathe, and a reverse thread adapter 4 matched with the Φ73 mm drill rod is welded and installed in the hole, so that the installation and fixation are reliable.
[0041] Embodiment 6
[0042] The embodiment is further optimization and refinement of the structure of the filling pipe 2 on the basis of the embodiment 5, and specifically:
[0043] The lower part of the filling pipe 2 is cut into a door hole 7, as shown in Figure 2 After the sealing plate 3 and the reverse thread adapter 4 are installed through the door hole 7, the door hole 7 is welded and blocked by a steel plate, which is one of the implementation manners of installing the sealing plate 3 and the like in the filling pipe 2.
[0044] The method for filling the filling pipe 2 from below to top by using the utility model is as follows:
[0045] Φ377mm wall thickness 10mm filling pipeline 2 to the bottom of the formed borehole, pipe wall grouting using pressure grouting form, according to the project, grouting using installation one-way valve (one-way valve 6) and using construction drill pipe as pressure grouting pipe way to carry out pressure grouting. The specific construction process is: processing one-way valve and assembling → 377mm filling pipeline 2 (the lower end of the pipe material is welded with a 10mm circular steel plate (sealing plate 3) in a certain height (20-40mm), the diameter of the circular steel plate is consistent with the inner diameter of the 377mm pipe, and the center of the circular steel plate is drilled with a Φ73mm drill rod connector hole, after drilling, the Φ73mm drill rod reverse thread connector 4 (convenient for pressure grouting to recover the drill pipe) is welded, the filling pipeline 2 below the circular steel plate is connected with the upper part only through the one-way valve, and the 377mm pipe wall below the one-way valve is marked with a certain proportion of flower pipe eye (slurry outlet 5) to facilitate subsequent pressure grouting) → Φ73mm drill rod (connected with one-way valve using reverse thread connector 4 thread connection, convenient for pressure grouting to recover the drill pipe). After normal, the mixed magnesium cement slurry with water-cement ratio of 0.5:1 (if there is no requirement, I use 0.05% triethanolamine and 0.5% salt as early strength agent) is injected into the annular gap between the filling pipe and the hole wall by water pump pressure, and the Φ73mm drill pipe is removed from the reverse joint of the reverse thread connector 4; after the lower grouting is completed and the slurry is solidified for a period of time (determined according to the temperature of the site and the solidification time of the cement slurry), in order to supplement the pressure grouting effect, the pre-buried grouting pipe can be pressure grouted, and the end standard is determined according to the slurry consumption and grouting pump pressure. Through the pressure grouting of the upper and lower parts, the pipe wall is truly consolidated and waterproofed; if you want to test the waterproof effect, you can use the engineering drill to drill a certain number of inspection holes in a certain range of the filling hole wall, and use the pressure test method to test the construction drill hole in sections.
[0046] By using the present application, after the drilling construction is completed, the filling pipeline 2 is placed in the borehole, in order to ensure the well wall and prolong the service life of the filling pipeline 2, ensure the normal use of the filling pipeline 2, carry out water sealing and well cementing using the bottom-up grouting process when the filling casing is lowered, at the same time, the filling casing can be well fixed, protected and effectively delayed in corrosion, and the service life of the wall pipe is prolonged. The use of the present application can make the pipe wall grouting quality reach a high level and improve the grouting quality of the filling pipe wall of the drilling construction.
[0047] Further, in the description of the present application, unless otherwise specified, if the terms "a plurality of", "a plurality of", "a plurality of" are used, the meaning of two or more than two, "a plurality of", "a plurality of", "a plurality of" is one or more than one. In the description of the present application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "internal", "external" and other indicated orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, structure and operation, therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance.
[0048] The specific embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.
Claims
1. A bottom-up grouting device for filling pipelines, used for wellbore casting in geological drilling, characterized in that: The filling pipe is placed in the geological drill hole with an annular gap between them, the lower part of the filling pipe is provided with a sealing plate to divide the inner cavity of the filling pipe into two chambers, the pipe wall of the filling pipe chamber below the sealing plate is provided with slurry holes, the reverse thread connector is arranged on the sealing plate and communicates with the inner cavities of the filling pipe above and below the sealing plate, during grouting, the construction drill rod used for forming the geological drill hole is connected with the reverse thread connector, and then the cement slurry is injected into the annular gap between the filling pipe and the wall of the geological drill hole through the construction drill rod by a high-pressure pump.
2. The down-the-hole grouting device according to claim 1, characterized in that: The one-way valve is arranged in the inner cavity of the filling pipe below the sealing plate and is installed on the reverse thread connector.
3. The down-the-hole grouting device according to claim 2, characterized in that: The sealing plate is 20-40 cm away from the lower end of the filling pipe.
4. The down-the-hole grouting device according to claim 3, characterized in that: A plurality of slurry holes are circumferentially arranged on the pipe wall of the chamber below the sealing plate of the filling pipe.
5. The down-the-hole grouting device according to claim 4, characterized in that: A plurality of slurry holes are arranged on the pipe wall of the chamber below the sealing plate of the filling pipe, each circle of slurry holes is arranged at different heights in the axial direction of the filling pipe, and each circle of slurry holes includes at least three slurry holes arranged in an array in the circumferential direction of the filling pipe.
6. The down-the-hole grouting device according to any one of claims 1 to 5, characterized in that: The filling pipe is a metal pipe with a diameter of 377 mm, the outer diameter of the sealing plate is consistent with the inner diameter of the filling pipe, the thickness of the sealing plate is consistent with the wall thickness of the filling pipe, and both are 10 mm thick.
7. A down-the-hole grouting device according to claim 6, characterized in that: The construction drill rod adopts a Φ73 mm drill rod, the middle part of the sealing plate is drilled by a lathe, and a reverse thread connector matched with the Φ73 mm drill rod is welded and installed in the hole.
8. The down-the-hole grouting device according to claim 7, characterized in that: The lower part of the filling pipe is cut with a door hole, the sealing plate and the reverse thread connector are installed through the door hole, and then the door hole is welded and blocked by a steel plate.