Anti-float anchor rod

Abstract

The application discloses an anti-floating anchor rod, which comprises a basement bottom plate and a sleeve pipe penetrating into the basement bottom plate, a high-strength threaded steel bar is assembled in the sleeve pipe, a cushion layer is assembled at the bottom end of the basement bottom plate, a steel sleeve pipe is sleeved outside the high-strength threaded steel bar in the cushion layer, a connecting end plate is assembled at the top end of the threaded steel bar, a stainless steel conical guide cap is assembled at the bottom end of the prestressed spiral steel bar, a rubber waterstop is arranged inside the top end of the sleeve pipe and outside the prestressed spiral steel bar, a waterstop rubber ring is assembled at the top end of the rubber waterstop, and a threaded steel bar a is sleeved outside the top end of the high-strength threaded steel bar and below the connecting end plate. The anti-floating anchor rod is simple in fixed connection mode of anchoring the steel bar into the bottom plate, easy to construct and free of tensioning, the combination of the rubber waterstop and the steel sleeve pipe can effectively deal with displacement changes caused by compression deformation of the bottom plate and tensile deformation of the anchor rod steel bar, and an effective water-blocking node is formed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to an anti-floating anchor rod. Background Art

[0002] Anti-floating anchor rods are an important measure to prevent floating in underground projects. They are more economical and practical, especially when the groundwater level is high, which can greatly reduce the cost of construction projects.

[0003] Anti-floating anchor rods are anchor rods installed in soil or rock layers to resist the floating effect of groundwater on buildings. They transmit the tensile force to the stable rock or soil layer. They usually include a rod body (composed of steel strands, steel bars, special steel pipes and other reinforcement materials), grouting body, anchor, casing and possible connectors.

[0004] Traditional non-prestressed anchor rods have the steel bars and concrete cast as a whole at one time. When subjected to stress, the tensile deformation of the steel bars will cause the concrete to crack, which does not meet the requirements of the specifications. The waterproofing method for the top of the prestressed anchor rod is cumbersome and difficult to ensure in actual projects. The anchor rod requires a long tensioning period. Therefore, an anti-floating anchor rod is needed to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide an anti-floating anchor rod, comprising a basement floor and an anchor rod body connected to the basement floor, wherein the anchor rod body is equipped with a high-strength threaded steel bar wrapped in a sleeve filled with grease, and the bottom end of the basement floor is equipped with a cushion layer, the interior of the cushion layer is located outside the high-strength threaded steel bar and is covered with a rubber water-stop pad, and a steel sleeve is provided outside the rubber water-stop pad and the anchor rod body;

[0006] The top end of the high-strength threaded steel bar is equipped with a connecting end plate, and the bottom end of the high-strength spiral steel bar is equipped with a stainless steel conical guide cap;

[0007] The inner top end of the anchor rod body is located outside the high-strength threaded steel bar and is provided with a rubber water-stop pad, and the top end of the high-strength threaded steel bar is equipped with a water-stop rubber ring;

[0008] The outer top of the high-strength threaded steel bar is located at the lower end of the connection end plate and is covered with a spiral stirrup a, and the outer end of the high-strength threaded steel bar is located at the upper end of the stainless steel conical guide cap and is covered with a spiral stirrup b;

[0009] The exterior of the sleeve filled with grease is clamped with a limiting piece over the entire length of the anchor rod body, and the bottom end of the limiting piece is equipped with a prestressed sleeve.

[0010] Preferably, a sleeve filled with grease is provided between the high-strength threaded steel bar and the anchor rod body, and is arranged below the bottom of the cushion layer.

[0011] Preferably, the outside of the rubber water-stop pad is equipped with a waterproof roll a, and the top of the waterproof roll a is equipped with a waterproof roll b.

[0012] Preferably, the prestressed sleeve includes a shaft seat a, a shaft seat b and a fixing plate, the shaft seat a and the shaft seat b are arranged opposite to each other, and the fixing plate is installed on the rear side walls of the shaft seat a and the shaft seat b;

[0013] The inner walls of the shaft seat a and the shaft seat b are evenly provided with rotating holes, and balls are installed in the rotating holes;

[0014] The outer wall of the prestressed threaded steel bar is provided with a rotation groove, and the positions of the rotation groove and the rotation hole correspond one to one, and the ball is arranged in the rotation groove.

[0015] Preferably, a rotation cavity is provided inside the rotation hole, an adaption mechanism is installed inside the rotation cavity, an arc plate is installed at the end of the adaption mechanism, and the ball is arranged in contact with the arc plate.

[0016] Preferably, the adaptation mechanism includes an outer plate, a middle plate and an inner plate. The four corners of the outer plate and the middle plate are hinged to each other, and telescopic rods are hinged to the four corners of the other side of the middle plate.

[0017] Preferably, the other ends of the four telescopic rods are hinged to the four corners of a side surface of the inner plate body.

[0018] Preferably, the adaptation mechanism includes a fixed plate, a fixed body and a spring, the spring is assembled between the fixed plate and the fixed body, balance rods are installed at both ends of the side wall of the fixed plate, a balance cavity is opened on the side wall of the fixed body, and the balance rod is inserted into the balance cavity.

[0019] Preferably, a balance plate is installed at the end of the balance rod, and the balance plate is arranged in the balance cavity.

[0020] Preferably, connecting plates are installed on both side outer walls of the shaft seat a and the shaft seat b, and screw holes are opened on the side walls of the connecting plates, and bolts are screwed into the screw holes;

[0021] The high-strength threaded steel bar is wrapped with a sleeve filled with grease within the length of the anchor rod body.

[0022] Compared with the existing technology, this solution designs an anti-floating anchor rod, which has the following beneficial effects:

[0023] (1) The scheme adopts a stress mode that changes the stress of the inner steel bar of the ordinary anchor rod, which drives the anchor rod body to be tensile and prone to cracking, to a stress mode in which the steel bar is pulled upward and squeezes the anchor rod itself, so that the anchor rod itself is compressed to avoid cracks. The steel bar is anchored into the base plate and fixed in the connection mode. It is simple and easy to construct and does not require tensioning. The combination of rubber water stop pad and steel sleeve can effectively deal with the displacement changes caused by the compressive deformation of the base plate and the tensile deformation of the anchor rod steel bar, and form an effective water-blocking node.

[0024] (2) The scheme can effectively handle the displacement changes caused by the compressive deformation of the base plate and the tensile deformation of the anchor steel bars through the combined components of the rubber water stop pad and the steel sleeve, and form an effective water-blocking node to reduce the influence of the concentrated force generated by the anchor support on the base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the first embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a steel casing in the first embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a prestressed sleeve in a second embodiment of the present invention;

[0028] Figure 4 This is a structural diagram of part A in the second embodiment of the present invention;

[0029] Figure 5 A schematic diagram of an adaptation mechanism in a second embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the adaptation mechanism in the second embodiment of the present invention.

[0031] In the figure: 1 prestressed threaded steel bar, 2 casing, 3 prestressed sleeve, 31 shaft seat a, 32 shaft seat b, 33 fixed plate, 4 limit plate, 5 steel casing, 6 cushion layer, 7 rubber water stop pad, 8 basement floor, 9 connecting end plate, 10 threaded bar a, 11 waterproof membrane b, 12 waterproof membrane a, 13 threaded bar a, 14 stainless steel conical guide cap, 15 water stop rubber ring, 16 connecting plate, 17 bolt, 18 rotating groove, 19 adaptation mechanism, 1911 inner plate body, 1912 telescopic rod, 1913 middle plate body, 1914 outer plate body, 1921 fixed body, 1922 spring, 1923 fixed plate, 1924 balance rod, 1925 balance plate, 1926 balance cavity, 20 rotating cavity, 21 rotating hole, 22 ball, 23 grease-filled casing. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 2 , which is the first technical solution provided by the present invention: an anti-floating anchor rod, comprising a basement floor 8 and an anchor rod body 2 connected to the basement floor 8, wherein a high-strength threaded steel bar 1 is assembled inside the anchor rod body 2, and a grease-filled sleeve 23 is wrapped around the outside of the high-strength threaded steel bar within the length of the anchor rod body; a cushion layer 6 is assembled at the bottom end of the basement floor 8, and a rubber waterstop pad 7 is sheathed on the outside of the high-strength threaded steel bar 1, and a steel sleeve 5 is arranged outside the rubber waterstop pad 7 and the anchor rod body 2; an annular water-swelling rubber ring is assembled on the top of the high-strength threaded steel bar 1: when there is a leak at the connection between the waterproof membrane a and the waterproof membrane b, a second waterproofing effect can be formed to prevent groundwater infiltration;

[0034] The top end of the threaded steel bar 1 is equipped with a connecting end plate 9, and the bottom end of the prestressed spiral steel bar 1 is equipped with a stainless steel conical guide cap 13; the rubber water stop pad (water-expanding type) is made of a single material with the water stop rubber ring and is combined with the steel casing to form a rubber plug. When the basement floor is deformed upward by the buoyancy of water, the water stop rubber ring drives the rubber water stop pad, causing displacement between the rubber water stop pad and the steel casing, but no water leakage occurs due to the compaction effect; when the basement floor is deformed downward by pressure, the top of the rubber water stop pad is reserved with a certain thickness and is made of elastic material. The rubber water stop pad will not generate excessive concentrated force due to the anchor rod fulcrum, resulting in unclear force on the basement floor;

[0035] The inner top end of the sleeve 2 is located outside the prestressed spiral steel bar 1 and is provided with a rubber water-stop pad 7, and the top end of the rubber water-stop pad 7 is equipped with a water-stop rubber ring 15;

[0036] The outer top of the high-strength threaded steel bar 1 is located at the lower end of the connection end plate 9 and is covered with a spiral stirrup a 10. The outer end of the high-strength threaded steel bar 1 is located at the upper end of the stainless steel conical guide cap 14 and is covered with a spiral stirrup b 13.

[0037] Steel casing: The upper half has a smooth inner surface, and is a composite component with the water-stop rubber ring, acting as a rubber plug. The smooth inner surface ensures that the rubber water-stop pad is in complete contact and sealed with the inner wall of the steel casing, and that the water-stop rubber ring and the steel casing are effectively water-tight when displacement occurs. The lower half has a rough inner surface, and this area is the connection section between the anchor concrete and the steel casing, ensuring that the anchor concrete and the steel casing are sealed and reliable. The steel casing and waterproof membrane a are made of one piece of material. The top outward end of the steel casing is connected to waterproof membrane a, ensuring a reliable connection between the steel casing and waterproof membrane a without any leaks. Waterproof membrane a is bonded to waterproof membrane b to achieve a waterproof seal.

[0038] Connecting end plate: used to fix high-strength threaded steel bars, meeting the anchoring requirements of high-strength threaded steel bars, so that high-strength threaded steel bars do not extend to the top of the basement floor, and reserve a certain thickness of rigid waterproofing;

[0039] Spiral stirrups: reinforcing steel bars at the point where the local compression of concrete is the greatest.

[0040] Basement slab: Reinforced concrete foundation slab, anchoring body to end plates.

[0041] Cushion layer: plain concrete foundation cushion layer, fixed and bonded with waterproof membrane a and waterproof membrane b.

[0042] Limiting piece: used to fix the high-strength threaded steel bar in the anchor rod to ensure that the high-strength threaded steel bar will not deviate during the anchor rod slurry pouring process.

[0043] High-strength threaded steel bars: anchor rods are mainly tensile components. When the basement floor is deformed upward by the buoyancy of water, the force is transferred to the high-strength threaded steel bars through the end plates connected by the fixings. When the high-strength threaded steel bars are in tension, the force is concentratedly transferred to the stainless steel conical guide caps. The stainless steel conical guide caps squeeze the anchor rods when they are in upward tension. The friction between the anchor rods and the soil resists the upward displacement of the stainless steel conical guide caps, thereby restraining the displacement of the basement floor and meeting the anti-floating requirements. Because there is a grease-filled sleeve 23 between the high-strength threaded steel bars and the anchor concrete, the anchor concrete will not be pulled during the deformation of the high-strength threaded steel bars. Therefore, the anchor rod body will not crack during the whole stress stage, but will become denser with pressure.

[0044] Casing (filled with grease): During the stress stage, the high-strength threaded steel bars deform upward, but the anchor rods do not deform. In order to prevent the high-strength threaded steel bars from exerting tensile stress on the concrete inside the anchor rods during the deformation stage, the casing is used to separate the high-strength threaded steel bars and the anchor rod concrete. When the anchor rod concrete leaks, the casing can also play a waterproof role, ensuring that the prestressed threaded steel bars will not rust when exposed to water.

[0045] Stainless steel conical guide cap: fixes high-strength threaded steel bars. When the high-strength threaded steel bars are under tension, the upward tension is converted into pressure and transmitted to the anchor concrete through the stainless steel conical guide cap.

[0046] Anchor concrete: The friction between the anchor concrete and the outer circle of soil is used to fix the anchor.

[0047] The outside of the rubber water-stop pad 7 is equipped with a waterproof roll a 12, and the top of the waterproof roll a 12 is equipped with a waterproof roll b 11.

[0048] See also Figures 1 to 6 , which is the second technical solution provided by the present invention: an anti-floating anchor rod, including a basement floor 8 and a casing 2 penetrating into the basement floor 8, with a prestressed threaded steel bar 1 installed in the casing 2, and a cushion layer 6 installed at the bottom end of the basement floor 8, with a steel casing 5 sleeved on the outside of the prestressed threaded steel bar 1 inside the cushion layer 6; an annular water-swelling water-stop rubber ring: made of a single material with the rubber water-stop pad, when there is a leak at the connection between the waterproof membrane a and the waterproof membrane b, it can form a second waterproofing effect to prevent groundwater infiltration;

[0049] The prestressed sleeve 3 includes a shaft seat a31, a shaft seat b32 and a fixing plate 33. The shaft seat a31 and the shaft seat b32 are arranged opposite to each other, and the fixing plate 33 is installed on the rear side walls of the shaft seat a31 and the shaft seat b32.

[0050] The inner walls of the shaft seat a 31 and the shaft seat b 32 are evenly provided with rotating holes 21, and the balls 22 are installed in the rotating holes 21;

[0051] A rotation groove 18 is formed on the outer wall of the prestressed threaded steel bar 1 , and the positions of the rotation groove 18 and the rotation holes 21 correspond one to one, and the balls 22 are arranged in the rotation groove 18 .

[0052] A rotation cavity 20 is provided inside the rotation hole 21 , an adaption mechanism 19 is installed inside the rotation cavity 20 , an arc plate is installed at the end of the adaption mechanism 19 , and the ball bearing 22 is arranged in contact with the arc plate.

[0053] The adaptation mechanism 19 includes a fixed plate 1923, a fixed body 1921 and a spring 1922. The spring 1922 is assembled between the fixed plate 1923 and the fixed body 1921. Balance rods 1924 are installed at both ends of the side wall of the fixed plate 1923. A balance cavity 1926 is opened on the side wall of the fixed body 1921, and the balance rod 1924 is inserted into the balance cavity 1926.

[0054] A balance plate 1925 is installed at the end of the balance rod 1924 , and the balance plate 1925 is disposed in the balance cavity 1926 .

[0055] The difference between the first technical solution and the second technical solution is that the first technical solution is applicable to high-strength threaded steel bars, while the second technical solution is applicable to prestressed steel bars.

[0056] The other components in the second technical solution are the same as those in the first technical solution.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0058] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An anti-floating anchor rod, comprising a basement floor (8) and an anchor rod body (2) connected to the basement floor (8), wherein a prestressed threaded steel bar (1) wrapped in a grease-filled sleeve (23) is assembled in the anchor rod body (2), characterized in that: The bottom end of the basement floor (8) is equipped with a cushion layer (6), the interior of the cushion layer (6) is located outside the prestressed threaded steel bar (1) and is covered with a rubber water stop pad (7), and a steel casing (5) is provided outside the rubber water stop pad (7) and the anchor rod body (2); The top end of the prestressed threaded steel bar (1) is equipped with a connecting end plate (9), and the bottom end of the prestressed threaded steel bar (1) is equipped with a stainless steel conical guide cap (14); The inner top end of the anchor rod body (2) is located outside the prestressed threaded steel bar (1) and is provided with a rubber water-stopping pad (7), and the top end of the prestressed threaded steel bar (1) is equipped with a water-stopping rubber ring (15); The outer top end of the prestressed threaded steel bar (1) is located at the lower end of the connection end plate (9) and is sheathed with a spiral stirrup a (10); the outer end of the prestressed threaded steel bar (1) is located at the upper end of the stainless steel conical guide cap (14) and is sheathed with a spiral stirrup b (13); The outside of the grease-filled sleeve (23) is located in the full length range of the anchor rod body (2) and is clamped with a limit plate (4), and the bottom end of the limit plate (4) is equipped with a prestressed sleeve (3); A sleeve (23) filled with lubricating grease is provided between the prestressed threaded steel bar (1) and the anchor rod body (2), and is arranged below the bottom of the cushion layer (6); The outside of the rubber water-stop pad (7) is equipped with a waterproof roll a (12), and the top of the waterproof roll a (12) is equipped with a waterproof roll b (11); The prestressed sleeve (3) comprises a shaft seat a (31), a shaft seat b (32) and a fixing plate (33), wherein the shaft seat a (31) and the shaft seat b (32) are arranged relative to each other, and the fixing plate (33) is installed on the rear side walls of the shaft seat a (31) and the shaft seat b (32); The inner walls of the shaft seat a (31) and the shaft seat b (32) are evenly provided with rotating holes (21), and balls (22) are installed in the rotating holes (21); The outer wall of the prestressed threaded steel bar (1) is provided with a rotation groove (18), and the positions of the rotation groove (18) and the rotation hole (21) correspond one to one, and the ball (22) is arranged in the rotation groove (18).

2. The anti-floating anchor rod according to claim 1, characterized in that: A rotation cavity (20) is provided inside the rotation hole (21), an adaption mechanism (19) is installed inside the rotation cavity (20), an arc plate is installed at the end of the adaption mechanism (19), and the ball (22) is arranged in contact with the arc plate.

3. The anti-floating anchor rod according to claim 2, characterized in that: The adaptability mechanism (19) comprises an outer plate (1914), a middle plate (1913) and an inner plate (1911); the four corners of the outer plate (1914) and the middle plate (1913) are hinged to each other; and telescopic rods (1912) are hinged to the four corners of the other side of the middle plate (1913).

4. The anti-floating anchor rod according to claim 3, characterized in that: The other ends of the four telescopic rods (1912) are hinged to the four corners of a side surface of the inner plate body (1911).

5. The anti-floating anchor rod according to claim 4, characterized in that: The adapting mechanism (19) comprises a fixing plate (1923), a fixing body (1921) and a spring (1922); the spring (1922) is assembled between the fixing plate (1923) and the fixing body (1921); balancing rods (1924) are installed at both ends of the side wall of the fixing plate (1923); a balancing cavity (1926) is formed on the side wall of the fixing body (1921); and the balancing rod (1924) is inserted into the balancing cavity (1926).

6. The anti-floating anchor rod according to claim 5, characterized in that: A balancing plate (1925) is installed at the end of the balancing rod (1924), and the balancing plate (1925) is arranged in the balancing cavity (1926).

7. The anti-floating anchor rod according to claim 6, characterized in that: Connecting plates (16) are installed on both side outer walls of the shaft seat a (31) and the shaft seat b (32), and screw holes are opened on the side walls of the connecting plates (16), and bolts (17) are screwed into the screw holes; The prestressed threaded steel bar (1) is wrapped with a sleeve (23) filled with lubricating grease within the length of the anchor rod body (2).

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