Tension-compression composite type anti-floating anchor rod and construction method thereof

Abstract

The invention relates to the technical field of rock-soil anchoring engineering, in particular to a tension-compression composite type anti-floating anchor rod which comprises a water stop ring, an oval bearing body, an end cap, a threaded steel bar, a first isolation sleeve and an assembly type support, the water stop ring is installed at a drilling hole opening, and the threaded steel bar is sequentially connected with the oval bearing body, the assembly type support and the end cap from top to bottom. The bottoms of the twisted steel bars are fixedly mounted in the end caps; the oval bearing body comprises a bearing plate and a bearing cap which are fixedly connected, through rib penetrating holes are formed in the bearing plate and the bearing cap, the horizontal section of the bearing plate is oval, and a convex face is arranged on the surface of the bearing plate; by using the oval bearing body, the pressure bearing area is reduced, and the accumulation risk of muck on the bearing body can be obviously reduced; the oval bearing body adopts the convex surface design, when part of muck falls into the drill hole and falls onto the end face of the oval bearing body, the muck easily slides off from the convex surface, and accumulation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of rock and soil anchoring engineering, and in particular to a tension-compression composite anti-floating anchor rod and a construction method thereof. Background Art

[0002] The tension-compression composite anti-floating anchor is gradually being promoted and applied in engineering due to its unique technical advantages, especially in the field of anti-floating engineering. Engineering practice shows that when the tension-compression composite anti-floating anchor is used in the anti-floating anchor engineering, since the anti-floating anchor is a vertical anchor and a bearing body is arranged in the rod body of the tension-compression composite anti-floating anchor, when the stratum where the anchor is located is prone to hole collapse and the sand content or coarse particle content is high, it is easy for debris to accumulate on the bearing body. In addition, during the on-site drilling and grouting construction, the movement of mechanical equipment and the dragging of the grouting pipe will also cause the debris at the hole mouth to fall into the borehole and clog the bearing body. These reasons will cause the accumulation of debris above the bearing body, further making it difficult for the grouting body to be locally densely solidified, and ultimately resulting in a significant reduction in the compressive strength of the grouting body at the pressure-bearing carrier, making it impossible for the pressure-bearing anchor section and the tension anchor section to bear the load in coordination, greatly weakening the pull-out bearing capacity of the tension-compression composite anti-floating anchor. In order to address the above-mentioned special strata or overcome engineering accidents caused by lax on-site construction, it is urgent to improve and optimize the tension-compression composite anti-floating anchor rod and adopt the most convenient technical solution to fully guarantee its pull-out bearing capacity.

[0003] Combined with long-term technical exploration, in order to solve the above-mentioned technical problems, the technology of the present invention was created. Summary of the invention

[0004] In order to solve the deficiencies in the above-mentioned prior art, the present invention provides a tension-compression composite anti-floating anchor rod, comprising a water stop ring, an elliptical bearing body, an end cap, threaded steel bars, a first isolation sleeve and an assembled bracket, the water stop ring is installed at the borehole mouth, the threaded steel bars are sequentially connected to the elliptical bearing body, the assembled bracket and the end cap from top to bottom, and the bottom of the threaded steel bars is fixedly installed in the end cap; the outer shell of the threaded steel bars from the elliptical bearing body to the borehole mouth is provided with a first isolation sleeve, and the grouting body length section corresponding to the first isolation sleeve forms a pressure-bearing anchoring section; the threaded steel bars from the elliptical bearing body to the bottom of the borehole are bonded with the grouting body, and the corresponding grouting body length section forms a tension-bearing anchoring section; the elliptical bearing body comprises a fixedly connected bearing plate and a bearing cap, the bearing plate and the bearing cap are provided with through-rib holes, the horizontal cross-section of the bearing plate is elliptical, and the surface of the bearing plate is provided with a convex surface.

[0005] Furthermore, the convex surface is a sloped convex surface or a spherical convex surface that is symmetrical along the long axis of the upper surface of the bearing plate.

[0006] Furthermore, the inner wall of the reinforcement hole is provided with an internal thread matching the threaded steel bar.

[0007] Further, the horizontal cross section of the bearing cap is circular or hexagonal.

[0008] Further, when the pull-out bearing capacity is less than a preset value, the threaded steel bar is installed with an elliptical bearing body.

[0009] Furthermore, when the pull-out bearing capacity is greater than a preset value, two elliptical bearing bodies are installed at a preset distance along the axial direction of the threaded steel bar, and a second isolation sleeve is sleeved between the two elliptical bearing bodies, and the length of the second isolation sleeve is the same as the preset distance between the two elliptical bearing bodies.

[0010] Furthermore, the long axes of the two elliptical carriers are arranged crosswise at a preset angle on the projection plane, and the first grouting pipe and the second grouting pipe are arranged within the angle formed by the intersection.

[0011] Furthermore, a spiral rib is sleeved on the outer side of the elliptical supporting body, the diameter of the spiral rib is greater than the length of the major axis of the elliptical supporting body, and the spiral rib is used to constrain the grouting body laterally or radially.

[0012] The present invention also provides a construction method of a tension-compression composite anti-floating anchor rod, wherein the tension-compression composite anti-floating anchor rod comprises an elliptical bearing body, comprising the following steps: (1) First, an elliptical bearing body is fixedly installed at a preset position of the threaded steel bar, and an isolation sleeve is installed on the threaded steel bar from the elliptical bearing body to the borehole mouth; (2) Fix the assembled bracket at the preset spacing on the tension anchoring section, install the end cap at the bottom of the threaded steel bar, clamp the first grouting pipe and the second grouting pipe on the pipe groove of the assembled bracket, extend them into the end cap, and tie them up and fix them respectively; (3) After drilling a hole to the preset elevation at the preset position, hoist and lower the processed anchor rod body, and install and align the water stop ring at the hole mouth; (4) Cement slurry is continuously injected into the borehole through the first grouting pipe until the grouting liquid continuously overflows from the hole mouth. After the preset interval time is reached, grouting is injected into the borehole through the second grouting pipe. When the preset requirements are met, the grouting is stopped.

[0013] The present invention also provides a construction method of a tension-compression composite anti-floating anchor rod, wherein the tension-compression composite anti-floating anchor rod comprises two elliptical bearing bodies, wherein the two elliptical bearing bodies are respectively a first elliptical bearing body and a second elliptical bearing body, wherein the first elliptical bearing body is an elliptical bearing body installed on the upper part of the threaded steel bar near the drill hole, and the second elliptical bearing body is located below the first elliptical bearing body, and wherein the construction method comprises the following steps: (1) First, a second elliptical bearing body is fixedly installed at a preset position of the threaded steel bar; (2) making a second isolation sleeve having the same preset spacing length as the first elliptical carrier and the second elliptical carrier, and sleeve the second isolation sleeve on the threaded steel bar so that the bottom of the second isolation sleeve abuts against the top of the second elliptical carrier; (3) installing the first elliptical carrier so that the long axes of the first elliptical carrier and the second elliptical carrier form a preset angle on the projection plane, and the bottom of the first elliptical carrier abuts against the top of the second isolation sleeve; (4) a first isolation sleeve is disposed outside the threaded steel bar, the bottom of the first isolation sleeve abuts against the top of the first elliptical bearing body, and the first isolation sleeve extends to the opening of the drill hole to form a pressure-bearing anchoring section; (5) Fix the assembled bracket at a preset spacing on the tension anchoring section, install the end cap at the bottom of the threaded steel bar, pass the first grouting pipe and the second grouting pipe through the angle formed by the first elliptical bearing body and the second elliptical bearing body in sequence, clamp them on the pipe groove of the assembled bracket, extend them into the end cap, and tie and fix them respectively; (6) After drilling a hole to the preset elevation at the preset position, hoist and lower the processed anchor rod body, and install and align the water stop ring at the hole mouth; (7) Cement slurry is continuously injected into the borehole through the first grouting pipe until the grouting liquid continuously overflows from the hole mouth. After the preset interval time is reached, grouting is injected into the borehole through the second grouting pipe. When the preset requirements are met, the grouting is stopped.

[0014] Based on the above, compared with the prior art, the tension-compression composite anti-floating anchor provided by the present invention has the following advantages: (1) The use of an elliptical bearing body reduces the pressure-bearing area, which can significantly reduce the risk of soil accumulation on the bearing body; (2) The elliptical bearing body adopts a convex surface design. When part of the slag falls into the drill hole and onto the end surface of the elliptical bearing body, it is easy to slide down from the convex surface to avoid accumulation. In addition, the elliptical bearing body adopts a convex surface, which has a certain squeezing and splitting effect on the grouting body. Under the strong restraint of the spiral reinforcement, the compressive bearing capacity of the grouting body can be improved; (3) Two oblique elliptical bearing bodies are arranged at intervals in the upper and lower parts. On the one hand, the grouting pipe can be directly passed through the angle to avoid opening holes in the steel pad of the bearing body. On the other hand, the pressure at the bearing body can be further decomposed to reduce the compressive stress on the grouting body at the bearing body.

[0015] Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions in which the components are drawn in the diagrams, unless otherwise specified.

[0017] Figure 1 A top view of an elliptical bearing body used in a tension-compression composite anti-floating anchor provided in accordance with an embodiment of the present invention; Figure 2 A bottom view of an elliptical bearing body corresponding to a bearing cap with a circular cross section used in a tension-compression composite anti-floating anchor provided in an embodiment of the present invention; Figure 3 A bottom view corresponding to a bearing cap with a hexagonal cross section used in the tension-compression composite anti-floating anchor provided in the first embodiment of the present invention; Figure 4 A three-dimensional diagram of a sloped convex elliptical bearing body used in a tension-compression composite anti-floating anchor provided in Example 1 of the present invention; Figure 5 For the present invention Fig. 9 Section 7-7 of ; Figure 6 For the present invention Fig. 9 Section 8-8 of ; Figure 7 For the present invention Fig. 9 9-9 section view; Figure 8 A front view of an elliptical bearing body with a sloped convex surface adopted by the tension-compression composite anti-floating anchor provided in the first embodiment of the present invention; Fig. 9 A side view of an elliptical bearing body with a sloped convex surface adopted by the tension-compression composite anti-floating anchor provided in the first embodiment of the present invention; Fig.10 A front view of an elliptical bearing body with a spherical convex surface used in a tension-compression composite anti-floating anchor provided in the first embodiment of the present invention; Fig.11 A side view of an elliptical bearing body with a spherical convex surface used in a tension-compression composite anti-floating anchor provided in the first embodiment of the present invention; Fig.12 A three-dimensional diagram of an elliptical bearing body with a spherical convex surface used in the tension-compression composite anti-floating anchor provided in the first embodiment of the present invention.

[0018] Fig.13A schematic diagram of the front structure of a water stop ring with an upper ring tube and a lower ring tube having the same diameter as provided in the third embodiment of the present invention; Fig.14 A schematic diagram of the top view of the water stop ring provided in the third embodiment of the present invention; Fig.15 A bottom-up structural schematic diagram of a water stop ring provided in Embodiment 3 of the present invention; Fig.16 A schematic diagram of the front structure of a water stop ring in which the diameter of the upper ring tube is smaller than the diameter of the lower ring tube provided in the third embodiment of the present invention; Fig.17 A front view of a water stop ring provided in Embodiment 3 of the present invention when the sleeve pipe is installed; Fig.18 A cross-sectional view of a water stop ring provided in Embodiment 3 of the present invention when the sleeve pipe is installed; Fig.19 A right side view of the water stop ring provided in the third embodiment of the present invention when the sleeve pipe is installed; Fig. 20 This is a schematic diagram of the front structure of the collar tube provided in the third embodiment of the present invention; Fig.21 for Figure 8 GG cross-sectional view; Fig. 22 A schematic diagram of the front structure of the water stop ring provided in the third embodiment of the present invention when the collar tube is not installed; Fig.23 for Fig.10 EE cross-sectional view; Fig.24 for Fig.10 FF cross-sectional view; Fig.25 This is a schematic engineering diagram of the installation of the water stop ring provided in the third embodiment of the present invention.

[0019] Fig.26 A top view of an assembled bracket provided in Embodiment 4 of the present invention; Fig. 27 A bottom view of the assembled bracket provided in the fourth embodiment of the present invention; Fig.28 A top view of a first bracket member provided in Embodiment 4 of the present invention; Fig.29 A front view of an assembled bracket provided in the fourth embodiment of the present invention; Fig.30 A rear view of the assembled bracket provided in the fourth embodiment of the present invention; Fig.31 A schematic diagram of the structure of an anti-floating anchor provided in Embodiment 4 of the present invention; Fig.32A cross-sectional view of a tension-compression composite anti-floating anchor rod using an elliptical bearing body provided in Embodiment 5 of the present invention; Fig.33 This is a cross-sectional view of a tension-compression composite anti-floating anchor rod using a combined bearing body according to Embodiment 5 of the present invention; Fig.34 For the present invention Figure 2 1-1 cross-sectional view; Fig.35 For the present invention Figure 2 2-2 section view; Fig.36 For the present invention Figure 2 3-3 section view; Fig.37 For the present invention Figure 2 Section 4-4 of ; Fig.38 For the present invention Figure 2 Section 5-5 of ; Fig.39 For the present invention Figure 2 Section 6-6 of ; Fig.40 A schematic diagram of the structure of an anchoring device provided in Embodiment 5 of the present invention; Fig.41 A cross-sectional view of an end cap provided in Embodiment 5 of the present invention; Fig.42 for Fig. 20 AA section view; Fig.43 for Fig. 20 BB cross-section diagram; Fig.44 for Fig. 20 CC cross-section diagram.

[0020] Reference numerals: DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that all terms (including technical terms and scientific terms) used in the present invention have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and should not be understood as limitations on the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in this invention.

[0023] Embodiment 1 The present invention provides an elliptical carrier 230, such as Figure 1 and Figure 2 As shown, it includes a bearing plate 231 and a bearing cap 232 that are fixedly connected. The plane of the bearing plate 231 is perpendicular to the axial normal of the bearing cap 232. The bearing cap 232 is arranged at the center of the bottom surface of the bearing plate 231. The bearing plate 231 and the bearing cap 232 are provided with connected rib holes 233. The horizontal cross-section of the bearing plate 231 is elliptical.

[0024] When implementing it, Figure 2 and Figure 3 As shown, the horizontal cross section of the bearing plate 231 of the elliptical bearing body 230 is elliptical, and the horizontal cross section of the bearing cap 232 is circular or hexagonal. The elliptical bearing body 230 is fixed to the threaded steel bar 110 through the reinforcement hole 233, and the bearing plate 231 is arranged upward toward the drill hole 104. The bearing plate 231 of the elliptical bearing body 230 has a small pressure-bearing area, which can significantly reduce the risk of slag accumulation on the bearing body. Combined with the strong constraint of the spiral reinforcement, the grouting body 105 at the bearing body installation location will not have insufficient compressive bearing capacity, thereby ensuring the safety of the anchoring project.

[0025] Furthermore, if Figures 4 to 12 As shown, the upper surface of the bearing plate 231 is a convex surface 234. Specifically, if the bearing plate 231 is a plane, the elliptical design cannot completely prevent the residue from remaining on the upper surface of the bearing plate 231. By forming a convex surface 234 on the upper surface of the bearing plate 231, the residue generated during the construction process will naturally fall along the convex surface 234 and will not remain on the surface of the bearing plate 231, further ensuring the safety of the anchoring construction. In one embodiment, the convex surface 234 is a sloped convex surface 234b or a spherical convex surface 234a symmetrical along the long axis of the upper surface of the bearing plate 231. Specifically, the sloped convex surface 234b is as shown in FIG. Figure 4 and Fig. 9 As shown, the cross section of the short axis of the elliptical carrier 230 of the sloped convex surface 234b is a triangle; the spherical convex surface 234a is as shown in FIG. Fig.10 , Fig.11 and Fig.12 As shown, the cross section of the minor axis of the elliptical supporting body 230 of the spherical convex surface 234a is hemispherical.

[0026] In one embodiment, an inner wall of the reinforcement hole 233 is provided with an internal thread. Specifically, the outer surface of the threaded steel bar 110 installed on the carrier is provided with an external thread, and the inner surface of the reinforcement hole 233 is provided with an internal thread. The external thread on the outer surface of the threaded steel bar 110 is threadedly connected with the internal thread inside the reinforcement hole 233, thereby ensuring the stability of the installation of the elliptical carrier 230.

[0027] Embodiment 2 During the construction process, it is necessary to install a grouting pipe to inject slurry. However, due to the small area of ​​the supporting plate 231, the elliptical supporting body 230 provided in this embodiment cannot provide a pipe-through hole on the surface of the supporting plate 231 for fixing the grouting pipe. However, in the actual construction process, the grouting pipe must be fixed to ensure its safety.

[0028] In order to solve the above technical problems, Fig.33 As shown, the present invention provides a combined carrier 235, which includes two elliptical carriers 230 as in Example 1, namely a first elliptical carrier 235a and a second elliptical carrier 235b. The first elliptical carrier 235a is arranged near the upper part of the borehole 104, and the second elliptical carrier 235b is located below the first elliptical carrier 235a. The angle θ formed by the long axis of the carrier plate 231 of the first elliptical carrier 235a and the long axis of the carrier plate 231 of the second elliptical carrier 235b has a value range of 0°<θ ≤ 90°.

[0029] Specifically, when the angle θ formed by the long axis of the bearing plate 231 of the first elliptical bearing body 235a and the long axis of the bearing plate 231 of the second elliptical bearing body 235b is equal to 90°, the first elliptical bearing body 235a is orthogonal to the second elliptical bearing body 235b; when the angle θ formed by the long axis of the bearing plate 231 of the first elliptical bearing body 235a and the long axis of the bearing plate 231 of the second elliptical bearing body 235b is less than 90°, the first elliptical bearing body 235a and the second elliptical bearing body 235b are oblique. The grouting pipe is clamped in the middle of the angle formed by the orthogonal or oblique intersection of the first elliptical bearing body 235a and the second elliptical bearing body 235b, so as to avoid opening a hole on the bearing plate 231. At the same time, compared with one elliptical bearing body 230, two elliptical bearing bodies 230 can further decompose the pressure at the elliptical bearing body 230, thereby reducing the compressive stress of the grouting body 105 at the elliptical bearing body 230.

[0030] Embodiment 3 At the mouth of the drill hole 104 for constructing the anti-floating anchor rod at the designed position, an interface is formed between the cushion layer and the basement floor, and an interface is formed between the cushion layer and the foundation soil. Grouting at the hole mouth is likely to produce floating slurry, and groundwater is likely to form seepage channels in the horizontal and vertical directions at the intersection, causing the threaded steel bar 110 to rust when it encounters water, reducing its tensile strength, inducing engineering accidents, and leading to basement floating accidents.

[0031] To solve the above technical problems, Fig.13 , Fig.14 and Fig.15 As shown, the present invention provides a water stop ring 240 for an anti-floating anchor rod, comprising an upper ring tube 241, a lower ring tube 242 and a ring plate 243, wherein the upper ring tube 241 is located above the ring plate 243, and the lower ring tube 242 is located below the ring plate 243, and the ring plate 243 is provided with a ring plate hole 243a, and the upper ring tube 241 and the lower ring tube 242 are hollow to form an upper ring hole 241a and a lower ring hole 242a, and the normal axes of the upper ring hole 241a, the ring plate hole 243a and the lower ring hole 242a coincide.

[0032] Specifically, when the normal axis coincides, the plane of the ring plate 243 is vertically arranged with the upper ring tube 241 and the lower ring tube 242. The water stop ring 240 is embedded between the bottom plate 100 and the borehole 104, and a cushion layer 103 is also arranged between the bottom plate 100 and the borehole 104. The ring plate 243 abuts against the cushion layer 103, and the threaded steel bar 110 is placed in the borehole after passing through the upper ring hole 241a, the ring plate hole 243a and the lower ring hole 242a. The side walls of the upper ring tube 241 and the lower ring tube 242 can effectively prevent groundwater from penetrating between the bottom plate 100 and the cushion layer 103, and between the cushion layer 103 and the soil layer of the borehole 104, thereby avoiding corrosion of the steel bars.

[0033] Preferably, if Fig.13 and Fig.16 As shown, the diameter of the upper annular hole 241a is the same as the diameter of the annular plate hole 243a and the lower annular hole 242a, or the diameter of the upper annular hole 241a is smaller than the diameter of the annular plate hole 243a and the lower annular hole 242a.

[0034] In the actual operation of drilling the hole 104, although the hole 104 has a design depth, in order to prevent the accumulation of debris at the bottom of the hole and the inability to insert the steel bar, the actual hole 104 will generally exceed the length of the anchor rod. In order to ensure the anchoring length of the threaded steel bar 110 in the bottom plate, the threaded steel bar 110 needs to be suspended inside the hole. At this time, two horizontal hanging bars 247 need to be installed at the top of the hole 104. The two horizontal hanging bars 247 bind and clamp the threaded steel bar 110, so that when the hole 104 is too deep, it can also ensure that the threaded steel bar 110 will not fall into the hole 104, and at the same time ensure that the anchoring length of the threaded steel bar 110 inside the bottom plate meets the design requirements.

[0035] In order to install the transverse suspension rod 247, Fig.17 , Fig.18 and Fig.19 As shown, this embodiment is provided with a sleeve tube 244 on the basis of the first embodiment, and the sleeve tube 244 is installed on the outside of the upper ring tube 241, and the upper ring tube 241 is symmetrically provided with a hanging rod placement groove 245, as shown in FIG. Fig. 20 and Fig.21 As shown, the collar tube 244 is symmetrically provided with hanger cover holes 246 , and the hanger cover holes 246 are arranged opposite to the hanger placement groove 245 .

[0036] When implementing it, Fig. 22 , Fig.23 and Fig.24 As shown, the diameters of the required fixed threaded steel bars 110 vary greatly, and the diameters of the threaded steel bars 110 required in different geological environments are all different. Therefore, a hanging bar placement groove 245 is provided on the upper ring tube 241, and the hanging bar placement groove 245 abuts against the ring plate 243. The width of the hanging bar placement groove 245 can match the requirements of different threaded steel bars 110 diameters, so that the horizontal hanging bars 247 can be stably installed and pressed against the ring plate. Preferably, the shape of the hanging bar placement groove 245 is rectangular, and the rectangular shape can be more conducive to the placement of the threaded steel bars 110.

[0037] In one embodiment, if Fig.17 , Fig.18 As shown, the collar tube 244 is sleeved on the outside of the upper ring tube 241 and is detachably connected to the water stop ring 240. The collar tube 244 includes a mutually perpendicular horizontal plate 244a and a vertical plate 244b. The hanging bar cover hole 246 is opened at the bottom of the vertical plate 244b. The opening of the hanging bar cover hole 246 can completely match the cross section of the horizontal hanging bar 247. The distance between the hanging bar cover holes 246 can be determined according to the diameter of the threaded steel bar 110. The hanging bar placement groove of the upper ring tube 241 matches the hanging bar cover hole 246 of the collar tube 244, which can not only match the installation requirements of different types of steel bars, but also can avoid the need to add a mold for the upper ring tube 241. It is only necessary to produce the collar tube 244 according to different requirements, which greatly reduces the cost.

[0038] Preferably, if Fig.21 As shown, the shape of the hanger cover hole 246 is a groove or a semicircle. Specifically, the cross section of the threaded steel bar 110 is generally circular, and the hanger cover hole 246 is set to be a groove or a semicircle to better fit the threaded steel bar 110.

[0039] The present invention also provides an anti-floating anchor rod, such as Fig.25 As shown, it includes a water stop ring for an anti-floating anchor as described in any one of the above items.

[0040] The present invention also provides a construction method for a water stop ring of an anti-floating anchor rod, which comprises the following steps: S1. After the drilling hole 104 is completed, the water stop ring 240 is installed at the opening of the drilling hole 104. When the anchor rod body is hoisted above the water stop ring 240, the collar tube 244 is removed; S2, lower the anchor rod body from the ring hole of the water stop ring 240 to the designed depth, and the horizontal hanging rod 247 is just inserted into the hanging rod placement groove 245 of the upper ring tube 241 and abuts against the ring plate 243; S3, sleeve the sleeve tube 244 onto the upper ring plate 243, so that the hanger cover holes 246 are respectively clamped on the horizontal hanger bars 247; S4, inject cement slurry into the borehole 104, and add slurry until the upper ring pipe 241 is filled with cement slurry.

[0041] Specific construction methods: Fig.25 As shown, after the construction of the borehole 104 is completed, the water stop ring 240 is installed at the hole mouth of the borehole 104, the anchor rod body is hoisted above the water stop ring 240, and the anchor rod body is lowered from the ring hole of the water stop ring 240 to a preset depth; the transverse hanging rod 247 is inserted into the hanging rod placement groove 245 of the upper ring tube 241, and abutted against the ring plate 243, and the transverse hanging rod 247 fixes the anchor rod body at a preset depth, which not only ensures the inner depth of the anchor rod body in the borehole, but also ensures the anchoring length of the threaded steel bar 110 in the bottom plate; the sleeve ring tube 244 is sleeved on the outside of the upper ring tube 241, so that the hanging rod cover holes 246 are respectively stuck on the transverse hanging rod 247; cement slurry is injected into the borehole 104, and the slurry is added until the upper ring tube 241 is filled with cement slurry.

[0042] Embodiment 4 The present invention provides an assembled bracket for an anti-floating anchor rod, such as Fig.26 , Fig. 27 and Fig.28 As shown, it includes a first bracket member 260a, a second bracket member 260b and a connecting member 267. The shapes of the first bracket member 260a and the second bracket member 260b are symmetrical. The connecting member 267 connects the first bracket member 260a and the second bracket member 260b symmetrically and detachably. The first bracket member 260a and the second bracket member 260b both include an end face 261 and a rib arc surface 265. The rib arc surface 265 is vertically connected to the bottom of the end face 261. The rib arc surface 265 of the first bracket member 260a and the rib arc surface 265 of the second bracket member 260b are spliced ​​to form a rib groove, and the rib groove is set at the center of the spliced ​​end faces 261 of the first bracket member 260a and the second bracket member 260b.

[0043] In specific implementation, a semicircular rib arc surface 265 with a certain length is provided at the bottom of the end surface 261. The rib arc surface 265 of the first bracket member 260a and the rib arc surface 265 of the second bracket member 260b are spliced ​​to form a rib groove for placing the threaded steel bar 110, which is arranged at the center of the end surface 261. The split first bracket member 260a and the second bracket member 260b are symmetrical in shape. When the assembled bracket 260 needs to be installed, the first bracket member 260a and the second bracket member 260b are directly spliced ​​at the designed position of the assembled bracket 260 of the threaded steel bar 110, and the rib arc surface 265 is buckled on the threaded steel bar 110. The first bracket member 260a and the second bracket member 260b are symmetrically and detachably connected through the connecting member 267, which greatly simplifies the construction strength and avoids the anti-corrosion coating of the threaded steel bar 110 from being damaged.

[0044] Preferably, the shape of the end faces 261 of the first bracket member 260a and the second bracket member 260b after being spliced ​​is an ellipse. Specifically, the shape of the end faces 261 of the first bracket member 260a and the second bracket member 260b after being spliced ​​is an ellipse, which reduces the cross-sectional area of ​​the assembled bracket 260 in the borehole 104, increases the area of ​​the gap between the end face 261 and the borehole 104, and avoids the excessively large cross section from blocking the grouting body 105.

[0045] In one embodiment, the assembled bracket 260 is further provided with two pipe grooves 266, which are semicircular notches. The pipe grooves 266 are symmetrically arranged on the long axis of the elliptical end face 261 after the first bracket member 260a and the second bracket member 260b are spliced. Specifically, in the actual construction process, the pipe grooves 266 are for the grouting pipe to pass through. The number of grouting pipes is generally two, so the setting of two pipe grooves 266 can meet most construction needs; the number of pipe grooves 266 can also be designed according to specific circumstances and is not limited to two. The shape of the pipe groove 266 is a semicircular notch, which can be well adapted to the shape of the grouting pipe. When the grouting pipe is installed, the pipe groove 266 clamps the grouting pipe to ensure the overall installation direction of the grouting pipe and the accuracy of the installation position of the grouting pipe.

[0046] In one embodiment, the rib groove 264 is provided with a rib groove matching the threaded steel bar 110. Specifically, the rib groove 264 of the assembled bracket 260 is provided with a rib groove matching the ribs of the threaded steel bar 110, and the rib groove inside the rib groove 264 matches the ribs of the threaded steel bar 110, thereby ensuring the firmness of the assembled bracket 260 installed on the threaded steel bar 110.

[0047] In one embodiment, if Fig.29 and Fig.30As shown, the first bracket member 260a and the second bracket member 260b respectively include two locking surfaces 262, and the two locking surfaces 262 are respectively connected to the two sides of the rib arc surface 265, and the top of the locking surface 262 is connected to the bottom of the end surface 261; at least one locking hole 263 is provided on the locking surface 262, and the locking hole 263 of the first bracket member 260a and the locking hole 263 of the second bracket member 260b are opposite to each other, and the connecting member 267 passes through the locking hole 263 of the first bracket member 260a and the locking hole 263 of the second bracket member 260b to symmetrically and detachably connect the first bracket member 260a and the second bracket member 260b.

[0048] In one embodiment, the connecting member 267 includes a screw rod 267a and a nut 267b.

[0049] During specific implementation, the first bracket member 260a and the second bracket member 260b are installed on the threaded steel bar 110 from both sides, so that the rib grooves on the inner walls of the rib grooves 264 of the first bracket member 260a and the second bracket member 260b are matched with the ribs on the outer wall of the threaded steel bar 110, and at the same time, the locking hole 263 of the first bracket member 260a and the locking hole 263 of the second bracket member 260b are aligned, and the locking hole 263 of the first bracket member 260a and the locking hole 263 of the second bracket member 260b are connected by a screw rod 267a, and the first bracket member 260a and the first bracket member 260a can be spliced ​​together to form a complete assembled bracket 260 by locking with a nut 267b. In this way, the splicing installation from both sides of the threaded steel bar 110 realizes the efficient installation of the assembled bracket 260, and at the same time avoids damaging the anti-corrosion coating on the surface of the threaded steel bar 110.

[0050] like Fig.31 As shown, the present invention also provides an anti-floating anchor rod, comprising an assembled bracket for an anti-floating anchor rod as described in any of the above items. Specifically, the number of assembled brackets for installing the anti-floating anchor rod is determined according to the specific situation and is not necessarily Fig.31 Three are shown, but other quantities are possible.

[0051] The present invention further provides a construction method of an anti-floating anchor rod including an assembled bracket, using the assembled bracket 260 for the anti-floating anchor rod as described in the first embodiment, comprising the following steps: S1. Install the assembled bracket 260 at a preset position of the threaded steel bar 110.

[0052] like Fig.31 As shown, the number of assembled brackets 260 is not limited to one, and multiple assembled brackets 260 may be installed at a preset distance, such as 2, 3, etc.

[0053] S2. Insert the first grouting pipe 106 and the second grouting pipe 107 into the pipe groove 266 of the assembled bracket 260 respectively, and tie them up firmly.

[0054] S3, installing the end cap 250 at the bottom of the threaded steel bar 110, and inserting the manufactured anchor rod into the drilled hole 104.

[0055] S4. Insert the water stop ring 240 on the top of the threaded steel bar 110 so that the ring plate of the water stop ring 240 abuts against the top of the cushion layer 103, and complete the primary grouting and the secondary grouting in sequence according to the requirements and time intervals.

[0056] S4. Lay the waterproofing membrane 102 on the cushion layer 103, and overlap the waterproofing membrane 102 on the ring plate of the water stop ring 240; then pour the protective layer 101 on the waterproofing membrane 102, and fill asphalt in the upper ring tube of the water stop ring 240 to construct the base plate 100.

[0057] Specifically, installing the assembled bracket 260 at the preset position of the threaded steel bar 110 includes the following steps: S11. Clamp the first bracket member 260a and the second bracket member 260b at the preset positions of the threaded steel bar 110 from both sides, and adjust the positions of the first bracket member 260a and the second bracket member 260b so that the rib grooves on the inner walls of the rib grooves 264 of the first bracket member 260a and the second bracket member 260b coincide with the ribs on the outer wall of the threaded steel bar 110.

[0058] Preferably, in this step, the first bracket member 260a and the second bracket member 260b are directly clamped at the preset positions of the threaded steel bar 110 from both sides, thereby avoiding damage to the anti-corrosion coating of the threaded steel bar 110.

[0059] S12, adjust the positions of the first bracket member 260a and the second bracket member 260b so that the rib grooves on the inner walls of the rib grooves 264 of the first bracket member 260a and the second bracket member 260b match the ribs on the outer wall of the threaded steel bar 110, and align the lock hole 263 of the first bracket member 260a and the lock hole 263 of the second bracket member 260b.

[0060] The inner wall of the rib groove 264 is provided with a rib groove matching the threaded steel bar 110. Preferably, the assembled bracket 260 can be more firmly installed on the threaded steel bar 110 through the engagement of the rib and the rib groove. The locking surface 262 is provided with a locking hole 263, and the locking hole 263 of the first bracket member 260a and the locking hole 263 of the second bracket member 260b are opposite in position.

[0061] S13, pass the screw rod 267a through the locking hole 263 of the first bracket member 260a and the locking hole 263 of the second bracket member 260b, lock the first bracket member 260a and the second bracket member 260b with the nut 267b, and fix the assembled bracket 260 on the threaded steel bar 110.

[0062] The connecting member 267 includes a screw rod 267a and a nut 267b threadedly connected to the screw rod 267a. The screw rod 267a and the nut 267b simplify the installation method of the assembled bracket 260 and improve the installation efficiency.

[0063] Embodiment 5 The present invention provides a tension-compression composite anti-floating anchor rod, such as Figure 32 to Figure 39 As shown, it includes a water stop ring 240, an elliptical carrier 230, an end cap 250, a threaded steel bar 110, a first isolation sleeve 111a and an assembled bracket 260. The water stop ring 240 is installed at the mouth of the borehole 104. The threaded steel bar 110 is connected to the elliptical carrier 230, the assembled bracket 260 and the end cap 250 in sequence from top to bottom. The bottom of the threaded steel bar 110 is fixedly installed in the end cap 250; the threaded steel bar 110 from the elliptical carrier 230 to the mouth of the borehole 104 is outer-coated with a first isolation sleeve 111a, and the length section of the grouting body 105 corresponding to the first isolation sleeve 111a forms a pressure-bearing anchoring section 108; the threaded steel bar 110 from the elliptical carrier 230 to the bottom of the borehole 104 is bonded to the grouting body 105, and the corresponding length section of the grouting body 105 forms a tension-bearing anchoring section 109.

[0064] The elliptical carrier 230 includes a carrier plate 231 and a carrier cap 232 that are fixedly connected. The carrier plate 231 and the carrier cap 232 are provided with through-rib holes 233 . The horizontal cross section of the carrier plate 231 is elliptical, and a convex surface 234 is provided on the surface of the carrier plate 231 .

[0065] In one embodiment, if Fig.40 As shown, the anchoring device 200 includes a first nut 201 and a first steel pad 202. The first steel pad 202 is vertically connected to the first nut 201. The first steel pad 202 and the first nut 201 are provided with a connected first reinforcement hole 203. The inner wall of the first reinforcement hole 203 forms an internal thread 225, which is threadedly connected with the external thread of the threaded steel bar 110.

[0066] In one embodiment, if Fig.32 As shown, when the pull-out bearing capacity is less than the preset value, the threaded steel bar 110 is installed with an elliptical bearing body 230 as described in Example 1. Specifically, when the pull-out bearing capacity of the tension-compression composite anti-floating anchor is low, such as the pull-out bearing capacity characteristic value does not exceed 350kN, an elliptical bearing body can be used. It should be noted that the pull-out bearing capacity characteristic value is not limited to the above-mentioned 350kN, and can also be determined according to the specific construction conditions.

[0067] In one embodiment, if Fig.33As shown, when the pull-out bearing capacity is greater than a preset value, a combined bearing body 235 as described in Example 2 is installed at a preset distance along the axial direction of the threaded steel bar 110, and a second isolation sleeve 111b is sleeved between the two elliptical bearing bodies 230 of the combined bearing body 2235, and the length of the second isolation sleeve 111b is the same as the preset distance between the two elliptical bearing bodies 230.

[0068] Specifically, when the pull-out bearing capacity of the tension-compression composite anti-floating anchor is high, such as when the pull-out bearing capacity characteristic value exceeds 350kN, a combined bearing body 235 can be used, including two elliptical bearing bodies 230 spaced apart and arranged crosswise, and the preset spacing can be 0.5m-1.0m, to further reduce the pressure on the grouting body 105 at the bearing body, and ensure that the bearing body does not suffer from compression damage, in order to improve the safety of the tension-compression composite anti-floating anchor. It should be noted that the pull-out bearing capacity characteristic value is not limited to the above-mentioned 350kN, and can also be determined according to the specific construction conditions.

[0069] Preferably, the long axes of the two elliptical carriers 230 are cross-arranged at a preset angle on the projection plane, and the first grouting pipe 106 and the second grouting pipe 107 are arranged within the angle formed by the intersection.

[0070] In one embodiment, if Fig.32 and Fig.33 As shown, the outer side of the elliptical carrier 230 is sleeved with a spiral rib 113 , the diameter of the spiral rib 113 is greater than the length of the long axis of the elliptical carrier 230 , and the spiral rib 113 is used to constrain the grouting body 105 laterally or radially.

[0071] Specifically, the outer side of the elliptical bearing body 230 of the present invention is provided with a spiral rib 113, and the diameter of the spiral rib 113 is greater than the length of the long axis of the elliptical bearing body 230. Since the top surface of the bearing plate 231 of the elliptical bearing body 230 is a slope or spherical surface symmetrical along the long axis, when the grouting body 105 is squeezed, a splitting effect will be generated on the grouting body 105. The outer side of the elliptical bearing body 230 is provided with a spiral rib 113, which will have a strong lateral or radial constraint effect on the grouting body 105, significantly improving the compressive bearing capacity of the grouting body 105, thereby fully ensuring the coordinated bearing of the pressure-bearing anchor section 108 and the tension-bearing anchor section 109, and greatly improving the pull-out bearing capacity of the tension-compression composite anti-floating anchor rod.

[0072] In one embodiment, if Figure 41 to Figure 44As shown, the end cap 250 includes a ball head 253, a screw groove 251, a flexible blade 254 and a stiffening rib 252. The ball head 253 is a hollow hemisphere. Two flexible blades 254 are connected to the upper part of the ball head 253. The horizontal cross-sectional diameter of the flexible blade 254 gradually increases upward. The cross-sectional shape after the ball head 253 and the flexible blade 254 are connected is "U"-shaped. The screw groove 251 is set at the inner center of the ball head 253. A stiffening rib 252 is set between the ball head 253 and the screw groove 251. The stiffening rib 252 is symmetrically arranged around the screw groove 251 at preset angles.

[0073] Preferably, the water stop ring 240 and the assembled bracket 260 in this embodiment can use the water stop ring 240 described in the third embodiment and the assembled bracket 260 described in the fourth embodiment.

[0074] The present invention also provides a construction method for a tension-compression composite anti-floating anchor rod. When the pull-out bearing capacity characteristic value of the tension-compression composite anti-floating anchor rod does not exceed a preset value, Fig.32 As shown, only one elliptical carrier 230 as described in the first embodiment is installed, which includes the following steps: (1) First, the elliptical support body 230 is fixedly installed at a preset position of the threaded steel bar 110, and an isolation sleeve is installed on the threaded steel bar 110 from the elliptical support body 230 to the orifice of the drill hole 104.

[0075] Specifically, the position where the threaded steel bar 110 needs to be installed on the elliptical carrier 230 is marked, the spiral bar 113 is sleeved on the outside of the supporting plate 231 of the elliptical carrier 230 and fixed by spot welding, and the first isolation sleeve 111a is installed above the elliptical carrier 230.

[0076] (2) Fix the assembled bracket 260 on the tension anchoring section 109 at a preset interval, install the end cap 250 at the bottom of the threaded steel bar 110, clip the first grouting pipe 106 and the second grouting pipe 107 to the pipe groove 266 of the assembled bracket 260, extend them into the end cap 250, and tie them up and fix them respectively.

[0077] Specifically, the assembled bracket 260 is installed under the elliptical carrier 230, and the end cap 250 is installed at the bottom of the threaded steel bar 110; then the first grouting pipe 106 and the second grouting pipe 107 are respectively passed through the spiral rib 113, clamped on the pipe groove 266 of the assembled bracket 260, and extended into the end cap 250.

[0078] (3) After drilling the hole 104 at the preset position to the preset elevation, the processed anchor rod body is hoisted and lowered, and the water stop ring 240 is installed and aligned at the opening of the drilled hole 104.

[0079] Specifically, a hole 104 is drilled at a preset position. After the hole 104 is drilled to a preset elevation, an assembled anchor rod is placed into the hole 104 to a preset depth, and a water stop ring 240 is inserted into the hole mouth so that the ring plate of the water stop ring 240 is placed on the cushion layer 103.

[0080] Preferably, a steel pipe can also be inserted from the top of the threaded steel bar 110 , and after the steel pipe passes through the upper ring hole and the lower ring hole of the water stop ring 240 , it abuts against the assembled bracket 260 and is exposed from the upper ring tube of the water stop ring 240 .

[0081] (4) Cement slurry is continuously injected into the borehole 104 through the first grouting pipe 106 until the grouting liquid continuously overflows from the hole mouth. After a preset interval time is reached, grouting is performed into the borehole 104 through the second grouting pipe 107. Grouting is stopped after the preset requirements are met.

[0082] Specifically, grouting is performed into the borehole 104 through the first grouting pipe 106, and grouting is stopped after continuous grouting at the borehole. After the first grouting is completed and a preset time interval has elapsed, a second grouting is performed through the second grouting pipe 107; Subsequently, prestressing and base plate 100 construction are carried out. After the strength of the grouting body 105 reaches the preset requirement, a reaction frame is installed on the cushion layer 103, and the threaded steel bars 110 are tensioned by using a through-hole jack to make the tension reach the preset requirement; the waterproof membrane 102 is laid on the cushion layer 103 to form a waterproof layer, and the waterproof membrane 102 is overlapped on the ring plate of the water stop ring 240; then the protective layer 101 is poured on the waterproof membrane 102, and then the anchoring device 200 is installed to carry out base plate 100 construction.

[0083] The present invention also provides a construction method for a tension-compression composite anti-floating anchor rod. When the pull-out bearing capacity characteristic value of the tension-compression composite anti-floating anchor rod exceeds a preset value, Fig.33 As shown, the combined bearing body 235 described in the second embodiment is installed, including a first elliptical bearing body 235a and a second elliptical bearing body 235b, the first elliptical bearing body 235a is an elliptical bearing body 230 installed on the upper part of the threaded steel bar 110 near the drill hole 104, and the second elliptical bearing body 235b is located below the first elliptical bearing body 235a, which includes the following steps: (1) First, the second elliptical bearing body 235b is fixedly installed at a preset position of the threaded steel bar 110; Specifically, the positions where the first elliptical carrier 235a and the second elliptical carrier 235b need to be installed on the threaded steel bar 110 are marked, the spiral bar 113 is sleeved on the outside of the supporting plate 231 of the first elliptical carrier 235a and the second elliptical carrier 235b and fixed by spot welding, and the second elliptical carrier 235b located at the lower part of the threaded steel bar 110 is installed on the threaded steel bar 110.

[0084] (2) manufacturing a second isolation sleeve 111b having the same preset spacing length as the first elliptical carrier 235a and the second elliptical carrier 235b, and sleeved the second isolation sleeve 111b on the threaded steel bar 110 so that the bottom of the second isolation sleeve 111b abuts against the top of the second elliptical carrier 235b; Specifically, a second isolation sleeve 111 b is installed on the top of the second elliptical supporting body 235 b , and the length of the second isolation sleeve 111 b is the same as the distance between the first elliptical supporting body 235 a and the second elliptical supporting body 235 b .

[0085] (3) Install the first elliptical support body 235a so that the long axes of the first elliptical support body 235a and the second elliptical support body 235b form a preset angle on the projection plane, and make the bottom of the first elliptical support body 235a abut against the top of the second isolation sleeve 111b.

[0086] Specifically, the first elliptical carrier 235a is continuously installed so that the angle θ formed by the long axis of the carrier plate 231 of the first elliptical carrier 235a and the long axis of the carrier plate 231 of the second elliptical carrier 235b is in the range of 0°<θ ≤90°.

[0087] (4) A first isolation sleeve 111a is disposed outside the threaded steel bar 110, the bottom of the first isolation sleeve 111a abuts against the top of the first elliptical carrier 235a, and the first isolation sleeve 111a extends to the opening of the borehole 104 to form a pressure-bearing anchoring section 108. Specifically, the first isolation sleeve 111a is installed above the first elliptical carrier 235a.

[0088] (5) Fix the assembled bracket 260 on the tension anchoring section 109 at a preset interval, install the end cap 250 at the bottom of the threaded steel bar 110, and sequentially pass the first grouting pipe 106 and the second grouting pipe 107 through the angle formed by the first elliptical supporting body 235a and the second elliptical supporting body 235b, clamp them on the pipe groove 266 of the assembled bracket 260, extend them into the end cap 250, and tie them up and fix them respectively.

[0089] Specifically, the assembled bracket 260 is installed below the second elliptical bearing body 235 b , and the end cap 250 is installed at the bottom of the threaded steel bar 110 .

[0090] It should be noted that the number of assembled brackets 260 is not limited to one, and can be 2, 3 or more, depending on the specific construction situation. It is not limited to the bottom of the second elliptical carrier 235b, and the assembled bracket 260 can also be installed above the first elliptical carrier 235a.

[0091] (6) After drilling the hole 104 at the preset position to the preset elevation, the processed anchor rod body is hoisted and lowered, and the water stop ring 240 is installed and aligned at the opening of the drilled hole 104.

[0092] Specifically, a hole 104 is drilled at a preset position. After the hole 104 is drilled to a preset elevation, an assembled anchor rod is placed into the hole 104 to a preset depth, and a water stop ring 240 is inserted into the hole mouth so that the ring plate of the water stop ring 240 is placed on the cushion layer 103.

[0093] Preferably, a steel pipe can also be inserted from the top of the threaded steel bar 110 , and after the steel pipe passes through the upper ring hole and the lower ring hole of the water stop ring 240 , it abuts against the assembled bracket 260 and is exposed from the upper ring tube of the water stop ring 240 .

[0094] (7) Cement slurry is continuously injected into the borehole 104 through the first grouting pipe 106 until the grouting liquid continuously overflows from the hole mouth. After a preset interval time is reached, grouting is performed into the borehole 104 through the second grouting pipe 107. Grouting is stopped after the preset requirements are met.

[0095] Specifically, grouting is injected into the borehole 104 through the first grouting pipe 106 , and grouting is stopped after continuous grouting at the hole mouth. After the first grouting is completed and a preset time interval has elapsed, a second grouting is performed through the second grouting pipe 107 .

[0096] Then, prestressing and bottom plate 100 construction are carried out. After the strength of grouting body 105 reaches the preset requirement, a reaction frame is installed on cushion layer 103, and threaded steel bar 110 is tensioned by using through-hole jack to make the tension reach the preset requirement; waterproofing coiled material 102 is laid on cushion layer 103 to form a waterproof layer, and waterproofing coiled material 102 is overlapped on the ring plate of water stop ring 240; then protective layer 101 is poured on waterproofing coiled material 102, and then anchoring device 200 is installed to carry out bottom plate 100 construction. By installing anchoring device 200, the anchoring force of threaded steel bar 110 in bottom plate 100 is increased.

[0097] It should be noted that the pull-out bearing capacity characteristic value of the above two tension-compression composite anti-floating anchor construction methods can be 350KN, but is not limited to 350KN and can be determined according to specific construction conditions.

[0098] After adopting the technology of the present invention, the following positive effects can be achieved under the conditions of sandy soil, loose weathered rock, easy-to-collapse strata, and adverse on-site environments: (1) It can significantly reduce or even completely eliminate the accumulation of debris above the carrier. Traditional carriers are circular with large cross-sectional areas. When debris is generated above the carrier, it will be blocked and deposited on the top, causing the local grouting body 105 to be loose and seriously insufficient in compressive bearing capacity. The present invention adopts an elliptical carrier 230 with a greatly reduced cross-sectional area, and the top surface of the bearing plate 231 adopts a slope or a spherical surface. When the debris is deposited on the carrier, part of the debris will pass through the large pores between the smaller elliptical carrier 230 and the borehole 104 and sink to the bottom of the borehole 104; part of the debris that falls on the bearing plate 231 will slide due to the special slope or spherical surface and then fall to the bottom of the borehole 104. Therefore, the present invention adopts an elliptical carrier 230 with a slope or spherical bearing plate 231, which can effectively prevent the debris from forming sediment above the carrier.

[0099] (2) The compressive bearing capacity of the grout at the bearing body is greatly improved. The outer side of the elliptical bearing body 230 of the present invention is provided with a spiral rib 113, and the diameter of the spiral rib 113 is greater than the length of the long axis of the elliptical bearing body 230. Since the top surface of the bearing plate 231 of the elliptical bearing body 230 is a slope or spherical surface symmetrical along the long axis, when the grouting body 105 is squeezed, a splitting effect will be generated on the grouting body 105. The spiral rib 113 is provided on the outer side of the elliptical bearing body 230, which will have a strong lateral or radial restraining effect on the grouting body 105, significantly improving the compressive bearing capacity of the grouting body 105, thereby fully ensuring the coordinated bearing of the pressure-bearing anchor section 108 and the tension-bearing anchor section 109, and greatly improving the pull-out bearing capacity of the tension-compression composite anti-floating anchor rod.

[0100] (3) Fully guarantee the centering effect of the tension-compression composite anti-floating anchor rod. An end cap 250 is provided at the bottom of the tension-compression composite anti-floating anchor rod. After the rod body is lowered to the bottom of the borehole 104, the diameter of the end cap 250 forms a protective layer, so that the rod body is in a centered state in the borehole 104, ensuring the bonding effect between the steel bars of the tension anchor section 109 and the grouting body 105.

[0101] (4) When the pull-out bearing capacity of the tension-compression composite anti-floating anchor is relatively high, such as when the pull-out bearing capacity characteristic value exceeds the preset value, two elliptical bearing bodies 230 spaced apart and arranged crosswise can be used, and the spacing can be 0.5m-1.0m, so as to further reduce the pressure on the grouting body 105 at the bearing body and ensure that the bearing body does not suffer from compressive damage, so as to improve the safety of the tension-compression composite anti-floating anchor.

[0102] (5) The waterproof effect of the tension-compression composite anti-floating anchor hole is greatly improved, and the construction is very convenient. After the tension-compression composite anti-floating anchor is lowered into the borehole 104, a water stop ring 240 is installed at the hole. Since the upper and lower tubes of the water stop ring 240 are connected to the ring plate as a whole, and the lower tube of the water stop ring 240 extends into the borehole 104, the horizontal seepage channel of the groundwater at the junction of the hole ground and the cushion layer 103 is blocked. The ring plate of the water stop ring 240 is pressed against the ground or cushion layer 103 of the hole, and the waterproof membrane 102 is laid on it, blocking the vertical seepage channel of the groundwater at the junction of the hole ground and the cushion layer 103. The upper tube is higher than the waterproof membrane 102, which further prevents the residual water at the interface of the waterproof membrane 102 and the bottom plate 100 from flowing in the horizontal direction. In addition, the threaded steel bar 110 at the hole is provided with an isolation sleeve. In summary, the application of water stop ring 240 greatly improves the water stop effect, and even completely eliminates the potential risk of waterproof failure of traditional waterproofing technology, and greatly simplifies the cumbersome construction processes such as traditional welding and overlapping.

[0103] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0104] Although the terms such as base plate, protective layer, waterproofing membrane, cushion layer, drilling, grouting body, first grouting pipe, second grouting pipe, pressure anchoring section, tension anchoring section, threaded steel bar, isolation sleeve, steel pipe, spiral rib, anchoring device, elliptical bearing body, bearing plate, bearing cap, rib hole, convex surface, combined bearing body, first elliptical bearing body, second elliptical bearing body, water stop ring, end cap and assembled bracket are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0105] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tension-compression composite anti-floating anchor, characterized in that: It includes a water stop ring, an elliptical bearing body, an end cap, a threaded steel bar, a first isolation sleeve and an assembled bracket, wherein the water stop ring is installed at the borehole opening, the threaded steel bar is sequentially connected to the elliptical bearing body, the assembled bracket and the end cap from top to bottom, and the bottom of the threaded steel bar is fixedly installed in the end cap; the threaded steel bar from the elliptical bearing body to the borehole opening is covered with the first isolation sleeve, and the grouting body length section corresponding to the first isolation sleeve forms a pressure-bearing anchoring section; the threaded steel bar from the elliptical bearing body to the bottom of the borehole is bonded to the grouting body, and the corresponding grouting body length section forms a tension-bearing anchoring section; The elliptical bearing body comprises a bearing plate and a bearing cap which are fixedly connected. The bearing plate and the bearing cap are provided with through rib holes. The horizontal cross section of the bearing plate is elliptical, and a convex surface is provided on the surface of the bearing plate.

2. The tension-compression composite anti-floating anchor according to claim 1, characterized in that: The convex surface is a sloped convex surface or a spherical convex surface that is symmetrical along the long axis of the upper surface of the bearing plate.

3. The tension-compression composite anti-floating anchor according to claim 1, characterized in that: The inner wall of the reinforcement hole is provided with an internal thread matching the threaded steel bar.

4. The tension-compression composite anti-floating anchor according to claim 1, characterized in that: The horizontal cross section of the bearing cap is circular or hexagonal.

5. The tension-compression composite anti-floating anchor according to claim 1, characterized in that: When the pull-out bearing capacity is less than a preset value, the threaded steel bar is installed with an elliptical bearing body.

6. The tension-compression composite anti-floating anchor according to claim 1, characterized in that: When the pull-out bearing capacity is greater than a preset value, two of the elliptical bearing bodies are installed at a preset distance along the axial direction of the threaded steel bar, and a second isolation sleeve is sleeved between the two elliptical bearing bodies, and the length of the second isolation sleeve is the same as the preset distance between the two elliptical bearing bodies.

7. The tension-compression composite anti-floating anchor according to claim 6 is characterized in that: The long axes of the two elliptical carriers are arranged crosswise at a preset angle on the projection plane, and the first grouting pipe and the second grouting pipe are arranged within the angle formed by the intersection.

8. The tension-compression composite anti-floating anchor according to claim 5 or 6, characterized in that: The outer side of the elliptical carrier is sleeved with spiral ribs, the diameter of the spiral ribs is greater than the length of the major axis of the elliptical carrier, and the spiral ribs are used to constrain the grouting body laterally or radially.

9. A construction method of a tension-compression composite anti-floating anchor rod, wherein the tension-compression composite anti-floating anchor rod is the tension-compression composite anti-floating anchor rod according to claim 5, characterized in that: The steps include: (1) First, an elliptical bearing body is fixedly installed at a preset position of the threaded steel bar, and an isolation sleeve is installed on the threaded steel bar from the elliptical bearing body to the borehole mouth; (2) Fix the assembled bracket at the preset spacing on the tension anchoring section, install the end cap at the bottom of the threaded steel bar, clamp the first grouting pipe and the second grouting pipe on the pipe groove of the assembled bracket, extend them into the end cap, and tie them up and fix them respectively; (3) After drilling a hole at a preset position to a preset elevation, hoist and lower the processed anchor rod body, and install and align a water stop ring at the hole opening; (4) Cement slurry is continuously injected into the borehole through the first grouting pipe until the grouting liquid continuously overflows from the hole mouth. After a preset interval time is reached, grouting is performed into the borehole through the second grouting pipe. After the preset requirements are met, the grouting is stopped.

10. A construction method of a tension-compression composite anti-floating anchor rod, wherein the tension-compression composite anti-floating anchor rod is the tension-compression composite anti-floating anchor rod according to claim 6, wherein the two elliptical bearing bodies are respectively a first elliptical bearing body and a second elliptical bearing body, wherein the first elliptical bearing body is an elliptical bearing body installed on the upper part of the threaded steel bar near the drill hole, and the second elliptical bearing body is located below the first elliptical bearing body, and wherein the first elliptical bearing body is a ... The steps include: (1) firstly, fixing and installing the second elliptical bearing body at a preset position of the threaded steel bar; (2) manufacturing a second isolation sleeve having the same length as the preset spacing between the first elliptical support body and the second elliptical support body, and sleeved the second isolation sleeve on the threaded steel bar so that the bottom of the second isolation sleeve abuts against the top of the second elliptical support body; (3) installing the first elliptical carrier so that the long axes of the first elliptical carrier and the second elliptical carrier form a preset angle on the projection plane, and the bottom of the first elliptical carrier abuts against the top of the second isolation sleeve; (4) a first isolation sleeve is disposed on the outer surface of the threaded steel bar, the bottom of the first isolation sleeve abuts against the top of the first elliptical bearing body, and the first isolation sleeve extends to the opening of the drill hole to form a pressure-bearing anchoring section; (5) Fix the assembled bracket at a preset spacing on the tension anchoring section, install the end cap at the bottom of the threaded steel bar, pass the first grouting pipe and the second grouting pipe through the angle formed by the first elliptical bearing body and the second elliptical bearing body in sequence, clamp them on the pipe groove of the assembled bracket, extend them into the end cap, and tie and fix them respectively; (6) After drilling a hole at a preset position to a preset elevation, hoist and lower the processed anchor rod body, and install and align a water stop ring at the hole opening; (7) Cement slurry is continuously injected into the borehole through the first grouting pipe until grouting liquid continuously overflows from the orifice. After a preset interval time is reached, grouting is performed into the borehole through the second grouting pipe. After the preset requirements are met, the grouting is stopped.

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