An assembled anti-floating anchor rod

Abstract

The application discloses an assembled anti-floating anchor rod, and relates to the technical field of anchor rods, which comprises an outer sleeve and an inner anchor rod, the outer sleeve is sleeved and threadedly connected to the outer anchor rod; the inner anchor rod comprises a rod body and a drill bit, and a grouting hole is formed in the inner anchor rod along the length direction of the inner anchor rod and penetrates through the rod body and the drill bit. The application has the effect of reducing the construction cost of the anti-floating anchor rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchor rods, in particular to an assembled anti-floating anchor rod. BACKGROUND

[0002] The anti-floating anchor rod is one of the anti-floating measures for underground structures in building engineering, which is a structural component arranged to resist upward displacement of the building above it, and is related to the height and variation of the underground water level.

[0003] The construction process of the anti-floating anchor rod usually first uses a drilling machine to drill a hole, then lowers a rod body into the hole, the rod body has various forms, and then grouting is performed through a grouting pipe in the rod body, and after the grout solidifies, the construction of the anti-floating anchor rod is completed. The anti-floating principle of this anchor rod is mainly realized by relying on the adhesion and friction between the anchoring segment and the surrounding soil.

[0004] One of the rod body forms is a self-drilling hollow anchor rod, which has a hollow passage in the middle for grouting. The self-drilling hollow anchor rod can be directly drilled into the soil layer and the grouting is completed through the hollow passage, and after the grouting is completed, the self-drilling hollow anchor rod remains in the soil layer and becomes part of the anti-floating anchor rod.

[0005] However, the unit price of the above-mentioned self-drilling hollow anchor rod is relatively high, thereby increasing the construction cost of the anti-floating anchor rod. SUMMARY

[0006] In order to reduce the construction cost of the anti-floating anchor rod, the present application provides an assembled anti-floating anchor rod.

[0007] The present application provides an assembled anti-floating anchor rod, which adopts the following technical solution:

[0008] An assembled anti-floating anchor rod comprises an outer sleeve and an inner anchor rod, the outer sleeve is sleeved and threadedly connected to the outer of the inner anchor rod.

[0009] The inner anchor rod comprises a rod body and a drill bit, and a grouting hole is formed in the inner anchor rod along the length direction of the inner anchor rod and penetrates the rod body and the drill bit.

[0010] By adopting the above technical solution, when the anti-floating anchor rod is constructed, the anchor rod drilling machine is used to drill the anti-floating anchor rod into the foundation, the inner anchor rod is provided with a drill bit, which can smoothly drill the anti-floating anchor rod into the ground; after the anti-floating anchor rod is drilled into the foundation, grouting is performed into the inner anchor rod through the grouting hole, since the inner anchor rod is threadedly connected with the outer sleeve, the inner anchor rod is rotated during the grouting process, thereby realizing the function of taking out the inner anchor rod from the outer sleeve while grouting. After the grouting is completed, the inner anchor rod is taken out from the outer sleeve, which can be used for the construction of the next anti-floating anchor rod, thereby realizing the multiple use of the inner anchor rod, saving the construction cost of the anti-floating anchor rod, and achieving better economic benefits.

[0011] Optionally, a plurality of first thread segments are arranged at intervals along the length direction of the inner anchor rod, and a plurality of second thread segments are arranged at intervals along the length direction of the inner wall of the outer sleeve, and each first thread segment is threadedly connected with a corresponding second thread segment.

[0012] By adopting the above technical solution, the first thread segment and the second thread segment are arranged at intervals, which can realize stable connection between the inner anchor rod and the outer sleeve, and can shorten the time for pulling out the inner anchor rod from the outer sleeve.

[0013] Optionally, a mounting disc is fixed to the side wall of the rod body, the mounting disc is arranged on the side of the rod body away from the drill bit, and the mounting disc is detachably connected with one end of the outer sleeve.

[0014] By adopting the above technical solution, the mounting disc is arranged on the rod body, so that the inner anchor rod and the outer sleeve can be fixedly connected and can be detached; when the anti-floating anchor rod is drilled into the foundation, the inner anchor rod and the outer sleeve are fixedly connected through the mounting disc, so that the inner anchor rod and the outer sleeve can be simultaneously drilled into the foundation; when the inner anchor rod is pulled out of the outer sleeve, the fixed connection between the inner anchor rod and the outer sleeve is released, so that the inner anchor rod can be smoothly taken out.

[0015] Optionally, a locking disc is fixed to one end of the outer sleeve close to the mounting disc, a plurality of first lock holes are formed in the mounting disc, a plurality of second lock holes are formed in the locking disc, the first lock holes and the second lock holes are formed one by one in correspondence, and a fixing member is arranged in each first lock hole and each second lock hole.

[0016] By adopting the above technical solution, the fixing member, which can be a bolt and a nut, is arranged in the corresponding first lock hole and the second lock hole, so that the inner anchor rod and the outer sleeve can be detachably connected, and the mounting and dismounting are convenient and fast.

[0017] Optionally, a circular thread groove is formed in the side wall of the mounting disc close to the drill bit, the outer wall of the outer sleeve is threadedly connected with the mounting disc, and the outer wall profile of the mounting disc is polygonal.

[0018] By adopting the above technical solution, the mounting disc and the outer sleeve are threadedly connected to realize the fixed connection between the outer sleeve and the inner anchor rod; when the anti-floating anchor rod is driven into the foundation, the anti-floating anchor rod is reversely rotated to realize the synchronous movement of the inner anchor rod and the outer sleeve; and the outer wall profile of the mounting disc is polygonal, which facilitates the rotation of the anti-floating anchor rod driven by the anchor rod drilling machine.

[0019] Optionally, a plurality of through grooves are formed in the side wall of the outer sleeve and extend through the side wall of the outer sleeve, and a bag is fixed in each through groove.

[0020] Through the above technical scheme, in the grouting process, the grouting liquid fills the bag, so that the bag stretches out of the through groove and expands, extruding the foundation soil around the anti-floating anchor rod, so that the anti-floating anchor rod has stronger anti-floating capacity.

[0021] Optionally, between the two adjacent second thread segments, only one through groove is arranged along the same vertical axis direction.

[0022] Through the above technical scheme, the amount of grouting liquid that fills the cavity of the outer sleeve and fills the bag between the two adjacent thread segments can be obtained through experiments; in construction, a certain amount of grouting liquid is injected between each two adjacent thread segments according to the experimental value, so as to improve the expansion effect of the bag. By arranging one through groove between the two adjacent second thread segments, i.e. arranging one bag, the mutual interference of the two adjacent bags after expansion along the same vertical axis can be reduced.

[0023] Optionally, a plurality of through grooves are arranged on the inner wall of the outer sleeve and spaced apart around the circumference of the inner wall.

[0024] Through the above technical scheme, the through grooves are arranged on the inner wall of the outer sleeve, so that after the construction of the anti-floating anchor rod is completed, the bag expands in all directions around the anti-floating anchor rod, which can further strengthen the anti-floating effect of the anti-floating anchor rod.

[0025] Optionally, the drill bit and part of the rod body protrude out of the outer sleeve, and a tooth cone is fixed to the end of the outer sleeve close to the drill bit.

[0026] Through the above technical scheme, when the anti-floating anchor rod is rotated downward by the anchor rod drilling machine, the drill bit can better drill downward, reducing the wear of the outer sleeve when it contacts the front rock stratum during the downward rotation of the anti-floating anchor rod. Since the outer diameter of the outer sleeve is greater than the outer diameter of the inner anchor rod, the hole diameter drilled by the inner anchor rod does not match the outer diameter of the outer sleeve. The tooth cone arranged at the end of the outer sleeve can make the outer sleeve more smoothly penetrate into the foundation.

[0027] Optionally, an external thread is arranged on the outer wall of the outer sleeve.

[0028] Through the above technical scheme, the external thread arranged on the outer wall of the outer sleeve can enhance the friction between the outer sleeve and the foundation soil, so that the anti-floating effect of the anti-floating anchor rod is better. At the same time, during the drilling process of the anti-floating anchor rod, the external thread arranged on the outer wall of the outer sleeve can make the outer sleeve more smoothly drill.

[0029] In summary, the present application has at least one of the following beneficial effects:

[0030] 1. The anti-floating anchor rod of the present application comprises an inner anchor rod and an outer sleeve, and the inner anchor rod can be taken out of the outer sleeve, so that the inner anchor rod can be repeatedly used, reducing the construction cost of the anti-floating anchor rod of the present application and reducing the engineering cost.

[0031] 2. A through slot is formed in the outer sleeve sidewall, and a bag is fixed in the through slot, so that during grouting, the bag can be inflated to compact the soil around the anti-floating anchor rod, thereby improving the uplift resistance of the anti-floating anchor rod, and the uplift resistance effect is better.

[0032] 3. The first threaded section and the second threaded section are arranged at intervals, which can accelerate the speed of pulling out the inner anchor rod from the outer sleeve, thereby accelerating the construction progress and saving construction time.

[0033] 4. The mounting disc is arranged, so that the inner anchor rod and the outer sleeve can be drilled into the soil layer synchronously, and the inner anchor rod can be taken out of the outer sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application;

[0035] Figure 2 is a sectional view along the center line of the rod body of embodiment 1 of the present application;

[0036] Figure 3 is a schematic diagram of the structure of the inner anchor rod of embodiment 2 of the present application;

[0037] Figure 4 is a sectional view along the center line of the rod body of embodiment 2 of the present application.

[0038] Reference signs: 1, outer sleeve; 11, second threaded section; 12, locking disc; 121, second lock hole; 13, through slot; 14, bag; 15, tooth cone; 2, inner anchor rod; 21, rod body; 22, drill bit; 23, grouting hole; 24, first threaded section; 25, mounting disc; 251, first lock hole; 252, circular threaded groove; 3, fixing member. DETAILED DESCRIPTION

[0039] The following will be described in detail in combination with the accompanying drawings Figures 1-4 The present application will be further described in detail.

[0040] Embodiment 1:

[0041] The assembled anti-floating anchor rod disclosed in the present application refers to Figure 1 The assembled anti-floating anchor rod comprises an inner anchor rod 2 and an outer sleeve 1, the inner anchor rod 2 is detachably connected with the outer sleeve 1, and the outer sleeve 1 and the inner anchor rod 2 are both made of steel. The inner anchor rod 2 comprises a rod body 21 and a drill bit 22 fixed at one end of the rod body 21, and a grouting hole 23 is formed through the inner anchor rod 2 in the middle of the inner anchor rod 2 along the length direction of the inner anchor rod 2, and the grouting hole 23 penetrates the rod body 21 and the drill bit 22.

[0042] Referring to Figure 1The outer sleeve 1 is sleeved outside the rod body 21, and when the outer sleeve 1 is fixed with the rod body 21, the length of the outer sleeve 1 is shorter than that of the rod body 21, the drill bit 22 and part of the rod body 21 are located outside the outer sleeve 1, and the maximum diameter of the drill bit 22 is smaller than the inner diameter of the outer sleeve 1, and the outer wall of the outer sleeve 1 is provided with external threads.

[0043] Referring to Figure 1 When the anti-floating anchor rod is driven into the foundation, the drill bit 22 is located outside the outer sleeve 1, and the drill bit 22 drills the soil, so that the anti-floating anchor rod can be smoothly driven into the foundation, and the outer sleeve 1 is provided with external threads on the outer wall, which can make the anti-floating anchor rod more easily drill down, and increase the friction between the anti-floating anchor rod and the soil, thereby improving the anti-floating capacity of the anti-floating anchor rod.

[0044] Referring to Figure 1 The end wall of the outer sleeve 1 close to the drill bit 22 is integrally formed with a toothed cone 15. Since the inner diameter of the outer sleeve 1 is greater than the maximum diameter of the drill bit 22, the hole drilled by the drill bit 22 does not match the outer diameter of the outer sleeve 1, and the outer sleeve 1 is not easy to sink into the foundation. The toothed cone 15 can crush the soil layer, so that the outer sleeve 1 can more easily drill down.

[0045] Referring to Figure 2 and Figure 3 The specific way in which the outer sleeve 1 is detachably connected with the inner anchor rod 2 is that the outer wall of the rod body 21 is provided with first threaded segments 24 along the length direction of the rod body 21 at intervals, the inner wall of the outer sleeve 1 is provided with second threaded segments 11 along the length direction of the outer sleeve 1 at intervals, the interval between adjacent two first threaded segments 24 is the same as the interval between adjacent two second threaded segments 11, and the length of the first threaded segment 24 is the same as the length of the second threaded segment 11. The outer sleeve 1 is sleeved outside the rod body 21 and is threadedly connected with the rod body 21.

[0046] Referring to Figure 2 The side wall of the rod body 21 away from the drill bit 22 is fixed with a mounting disc 25, and the plane on which the mounting disc 25 is located is perpendicular to the length direction of the rod body 21. The end face of the outer sleeve 1 away from the drill bit 22 is fixed with a locking disc 12. When the outer sleeve 1 is threadedly connected with the inner anchor rod 2 and is fixed, the locking disc 12 abuts against the mounting disc 25, and the outer contours of the locking disc 12 and the mounting disc 25 are aligned. The outer contours of the locking disc 12 and the mounting disc 25 are polygonal. A plurality of first lock holes 251 are formed in the mounting disc 25, and a plurality of second lock holes 121 are formed in the locking disc 12. The plurality of first lock holes 251 and the plurality of second lock holes 121 are arranged one by one in correspondence. Fixed members 3 are arranged in the opposite first lock hole 251 and the second lock hole 121. The fixed member 3 is specifically a bolt and a nut matched with the bolt. The locking between the mounting disc 25 and the locking disc 12 can be realized through the fixed member 3, so as to realize the locking of the positions of the inner anchor rod 2 and the outer sleeve 1.

[0047] With reference to Figure 1 and Figure 2 When the anti-floating anchor is drilled downward, the inner anchor 2 and the outer sleeve 1 are first locked in position by the fixing member 3, and the anti-floating anchor is drilled into the foundation by the anchor drill. At this time, the outer profile of the mounting disc 25 and the locking disc 12 is set to be polygonal, which facilitates the rotation of the anti-floating anchor by the anchor drill and sinking into the soil layer. After the anti-floating anchor is drilled into the soil layer, the locking of the fixing member 3 is released, and the inner anchor 2 can be taken out of the outer sleeve 1 by rotating the inner anchor 2. The inner anchor 2 can be reused for the construction of the next anti-floating anchor, which saves construction materials and reduces construction costs compared with the traditional self-drilling hollow anchor construction.

[0048] With reference to Figure 1 and Figure 2 A plurality of through grooves 13 are also provided on the side wall of the outer sleeve 1, and each through groove 13 is fixed with a bag 14. When the anti-floating anchor is mass-produced in the production plant, the bag 14 is folded and stored in the through groove 13, and an opening is provided on the bag 14, which is in communication with the inner cavity of the outer sleeve 1. After the anti-floating anchor is driven into the soil layer, the grouting liquid can flow into the bag 14 when grouting into the outer sleeve 1, so that the bag 14 expands into the soil layer, extruding the soil, so that the bag 14 filled with grouting liquid is embedded in the soil, thereby improving the anti-floating effect of the anti-floating anchor.

[0049] With reference to Figure 1 and Figure 2 The bags 14 are spaced apart along the inner wall of the outer sleeve 1, so that the bags 14 can expand around the outer sleeve 1, so that the anti-floating anchor is expanded by the bags 14. In this way, on the one hand, the balance of the anti-floating anchor can be improved, and on the other hand, the anti-floating effect of the anti-floating anchor is better. Between the two adjacent second threaded segments 11, a plurality of through grooves 13 can be provided along the same vertical axis direction, but in the optimal embodiment of the present application, only one through groove 13 is provided between the two adjacent second threaded segments 11 along the same vertical axis direction. If only one through groove 13 is provided between the two adjacent second threaded segments 11 along the same vertical axis direction, when the bag 14 expands, the bags 14 do not easily interfere with each other, thereby improving the effect of the bag 14 on the anti-floating ability of the anti-floating anchor.

[0050] The implementation principle of the assembled anti-floating anchor is that when the anti-floating anchor is produced in the production plant, the amount of grouting liquid required to inflate and fill the inner cavity of the outer sleeve 1 between the two adjacent second threaded segments 11 by inflating all the bags 14 between the two adjacent second threaded segments 11 can be obtained by experiments. The actual construction is carried out according to the experimental value.

[0051] In the construction of the anti-floating anchor rod, the installation disc 25 and the locking disc 12 are first connected with the anchor rod drilling machine, the anti-floating anchor rod is drilled into the soil layer by rotating the anchor rod drilling machine, and after the anti-floating anchor rod is completely drilled into the soil layer, the locking between the installation disc 25 and the locking disc 12 is released. Grouting liquid is injected into the grouting hole 23, and at the same time, the inner anchor rod 2 is rotated to pull out the inner anchor rod 2 from the outer sleeve 1. Since the inner anchor rod 2 is intermittently threaded with the outer sleeve 1, only the inner anchor rod 2 needs to be rotated intermittently and pulled out continuously. During the time period between adjacent two rotations of the inner anchor rod 2, the grouting liquid is injected into the outer sleeve 1 according to the experimental grouting liquid amount. The specific situation is determined according to the geological conditions. If the soil layer is relatively hard, it is difficult to inject the required amount of grouting liquid during the time period between adjacent two rotations of the inner anchor rod 2, and the grouting should be stopped immediately.

[0052] The inner anchor rod 2 is pulled out, and the grouting liquid is injected into the outer sleeve 1 through the grouting hole 23, until the inner anchor rod 2 is completely pulled out, that is, the construction of the anti-floating anchor rod is completed. The pulled-out inner anchor rod 2 can be used for the construction of the next anti-floating anchor rod, so as to realize the reuse of the inner anchor rod 2, reduce the material loss, and reduce the construction cost.

[0053] Embodiment 2

[0054] The difference between the embodiment 2 of the present application and the embodiment 1 is that, referring to Figure 4 , the side wall of the outer sleeve 1 away from the drill bit 22 is not provided with the locking disc 12, and the circular threaded groove 252 is opened on the side wall of the installation disc 25 close to the drill bit 22, so that the installation disc 25 can be threaded with the outer wall of the outer sleeve 1, thereby realizing the detachable connection between the inner anchor rod 2 and the outer sleeve 1, and the outer contour of the installation disc 25 is still polygonal. When the anchor rod drilling machine is used to drill the anti-floating anchor rod into the soil layer, it can be rotated in the direction of tightening the installation disc 25 and the outer sleeve 1.

[0055] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pre-assembled anti-floatation anchor, characterized in that: It comprises an outer sleeve (1) and an inner anchor rod (2), the outer sleeve (1) is sleeved and threadedly connected to the outer anchor rod (2); The inner anchor rod (2) comprises a rod body (21) and a drill bit (22), a grouting hole (23) is formed in the inner anchor rod (2) along the length direction of the inner anchor rod (2) and penetrates the rod body (21) and the drill bit (22); a plurality of first threaded sections (24) are arranged along the length direction of the inner anchor rod (2) at intervals, a plurality of second threaded sections (11) are arranged at intervals along the length direction on the inner wall of the outer sleeve (1), and the plurality of first threaded sections (24) are threadedly connected to the plurality of second threaded sections (11) one by one; a plurality of through grooves (13) are formed in the side wall of the outer sleeve (1) and penetrate the side wall of the outer sleeve (1), and a bag (14) is fixed in each through groove (13); only one through groove (13) is formed between two adjacent second threaded sections (11) along the same vertical axis direction.

2. The assembled anti-floating anchor rod according to claim 1, characterized in that: A mounting disc (25) is fixed to the side wall of the rod body (21), the mounting disc (25) is arranged on the side of the rod body (21) away from the drill bit (22), and the mounting disc (25) is detachably connected to one end of the outer sleeve (1).

3. The assembled anti-floating anchor rod according to claim 2, characterized in that: A locking disc (12) is fixed to one end of the outer sleeve (1) close to the mounting disc (25), a plurality of first lock holes (251) are formed in the mounting disc (25), a plurality of second lock holes (121) are formed in the locking disc (12), and the first lock holes (251) and the second lock holes (121) are formed one by one, and a fixing member (3) is arranged in each first lock hole (251) and each second lock hole (121).

4. The assembled anti-floating anchor rod according to claim 2, characterized in that: A circular threaded groove (252) is formed in the side wall of the mounting disc (25) close to the drill bit (22), the outer sleeve (1) is threadedly connected to the mounting disc (25), and the outer wall of the mounting disc (25) is polygonal in outline.

5. The assembled anti-floating anchor rod according to claim 1, characterized in that: A plurality of through grooves (13) are formed at intervals along the circumferential side of the inner wall of the outer sleeve (1) between two adjacent threaded sections.

6. The assembled anti-floating anchor rod according to claim 1, wherein: The drill bit (22) and part of the rod body (21) protrude out of the outer sleeve (1), and a tooth cone (15) is fixed to the end of the outer sleeve (1) close to the drill bit (22).

7. The assembled anti-floating anchor rod according to claim 1, wherein: An external thread is formed on the outer wall of the outer sleeve (1).

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