Grouting squeezing and expanding anchor-pile structure

Abstract

The utility model provides a grouting squeezing and expanding anchor-pile structure. The grouting squeezing and expanding anchor-pile structure comprises a pile body and an anchoring device. A connecting end plate is arranged in the middle of the anchoring device, the anchoring device is connected with a bottom end plate of the pile body through the connecting end plate, the anchoring device is divided into a free section and an anchoring section by the connecting end plate, the free section is located in the pile body, the anchoring section extends out of the pile body, and the free section and the anchoring section are detachably connected; the anchoring device comprises a slurry binding bag, the periphery of the anchoring section is sleeved with the slurry binding bag, and the slurry binding bag is used for containing the filling material and extruding and expanding outwards in the installation process to form a stone body. According to the configuration, the interaction force between the anchoring device and the soil layer is improved in the mode that the surrounding soil layer is squeezed and expanded by the stone body formed through grouting, and therefore the overall bearing capacity of the grouting squeezing and expanding anchor-pile structure is improved; meanwhile, the anchoring device and the pile body are both constructed by adopting factory prefabrication and field assembly processes, so that the construction is simple and efficient, and the construction cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering construction, in particular to a grouting extrusion expansion anchor-pile structure. Background Art

[0002] In the actual construction process, the pull-out bearing efficiency of anchor rods is high, material consumption is low, and the overall cost is low. However, anchor rods can only provide pull-out bearing capacity, not compressive bearing capacity, and cannot take into account the requirements of pull-out and compression, so the scope of use is greatly limited. Pile foundations can provide both pull-out bearing capacity and compressive bearing capacity, which can meet the needs of the project, so the scope of use is wider, but the pile foundation bearing efficiency is relatively low, material consumption is high, and the overall cost is high.

[0003] Based on this, how to provide a basic structure that has both pull-out and compressive properties, high load-bearing efficiency, low material consumption, and low overall cost has become a technical problem that technical personnel in this field need to solve. Utility Model Content

[0004] The utility model aims to provide a grouting and expansion anchor-pile structure to solve the problems that the foundation structure in the prior art cannot take into account both pull-out resistance and compression resistance, and has low bearing efficiency, high material consumption and high comprehensive cost.

[0005] In order to achieve the above-mentioned object, the utility model provides a grouting extrusion expansion anchor-pile structure, comprising: a pile body and an anchoring device;

[0006] A connecting end plate is provided in the middle of the anchoring device, the anchoring device is inserted into the interior of the pile body and connected to the bottom end plate of the pile body through the connecting end plate, the connecting end plate divides the anchoring device into a free section and an anchoring section, the free section is located inside the pile body, the anchoring section extends out of the pile body, and the free section and the anchoring section are detachably connected;

[0007] The anchoring device comprises a slurry bag, which is sleeved on the outer circumference of the anchoring section. The slurry bag is used to accommodate filling material and expand it outwards to form a stone body during installation to provide bearing capacity.

[0008] Optionally, the anchoring device includes: an anchor rod and a grouting pipe;

[0009] The anchor rod has the free section and the anchoring section; the grouting pipe is arranged parallel to the anchor rod, the grouting pipe is passed through the interior of the pile body, and extends from the connecting end plate into the interior of the grout bag for injecting the filling material into the grout bag.

[0010] Optionally, the anchoring device is further provided with a first connecting member, and the anchor rod includes two sections of steel bars, and the two sections of steel bars are connected at the connecting end plate through the first connecting member.

[0011] Optionally, the anchoring device is further provided with a second connecting piece, and the grouting pipe includes two sections of pipe fittings, and the two sections of the pipe fittings are connected at the connecting end plate through the second connecting piece.

[0012] Optionally, the anchoring device comprises: a hollow pipe;

[0013] The hollow pipe member includes the free section and the anchoring section. The free section is inserted into the interior of the pile body. A grouting device is provided at the bottom of the anchoring section. The interior of the hollow pipe member has a hollow tube cavity, and the hollow tube cavity is used for the filling material to flow. The grouting device is used for injecting the filling material into the grout bag.

[0014] Optionally, the anchoring device is further provided with a third connecting member, and the hollow pipe member includes two sections of steel pipes, and the two sections of the steel pipes are connected at the connecting end plate through the third connecting member.

[0015] Optionally, the anchoring device also includes an annular pressure plate and a pressure plate, wherein the annular pressure plate is arranged on the side of the connecting end plate away from the pile body, the pressure plate is arranged at the bottom of the anchoring section, one end of the slurry bag is arranged between the connecting end plate and the annular pressure plate, and the other end is fixed to the pressure plate.

[0016] Optionally, the connecting end plate is provided with a through hole and a plurality of connecting holes, the through hole is used for the anchoring device to pass through, and the plurality of connecting holes are arranged along the circumference of the connecting end plate for fasteners to pass through to achieve the connection between the connecting end plate and the bottom end plate of the pile body or to fix the grout bag.

[0017] Optionally, the connecting hole includes a first connecting hole and a second connecting hole, and the fastener includes a first fastener and a second fastener, the first fastener passes through the first connecting hole and is connected to the bottom end plate of the pile body, and the second fastener passes through the second connecting hole to connect the annular pressure plate and the end plate and fix the slurry bag.

[0018] Optionally, a connecting through hole is provided at a position of the bottom end plate corresponding to the first connecting hole, a first internal thread is provided in the connecting through hole, and the first fastener is adapted to the first internal thread to achieve connection; a second internal thread is provided in the second connecting hole, and the second fastener is adapted to the second internal thread to achieve connection.

[0019] Compared with the prior art, the grouting squeeze expansion anchor-pile structure proposed in this application has the following advantages:

[0020] The present application provides a pile body and an anchoring device, connects the pile body and the anchoring device by connecting end plates, and provides a grouting bag at the anchoring section of the anchoring device, so as to form a stone body by grouting to squeeze the surrounding soil layer, thereby improving the interaction force between the anchoring device and the soil layer, thereby improving the overall bearing capacity of the grouting and squeezing anchor-pile structure; at the same time, the anchoring device mainly provides the pull-out bearing capacity, and the pile body mainly provides the compressive bearing capacity, so that their respective advantages are fully utilized, the material utilization efficiency is improved, and the material consumption is reduced, and both the anchoring device and the pile body are constructed by factory prefabrication and on-site assembly technology, the free section and the anchoring section are detachably connected, the construction is simple and efficient, and the project cost can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a first structural example of a grouting and expansion anchor-pile structure provided by an embodiment of the utility model;

[0022] Figure 2 A second structural schematic diagram of a grouting and expansion anchor-pile structure provided by an embodiment of the utility model;

[0023] Figure 3 for Figure 1 A schematic diagram of the connection relationship between the connecting end plate and the bottom end plate of the pile body;

[0024] Figure 4 for Figure 2 A schematic diagram of the connection relationship between the connecting end plate and the bottom end plate of the pile body;

[0025] Figure 5 for Figure 1 Schematic diagram of the connection relationship between the pressure-bearing plate and the anchoring section;

[0026] Figure 6 for Figure 2 Schematic diagram of the connection relationship between the pressure-bearing plate and the anchoring section;

[0027] Figure 7 A top view of the connection end plate and the annular pressure plate;

[0028] Figure 8 A schematic diagram of step S1 in the construction method of the grouting, squeezing and expanding anchor-pile structure provided by an embodiment of the utility model;

[0029] Fig. 9 A schematic diagram of step S2 in the construction method of the grouting, squeezing and expanding anchor-pile structure provided by an embodiment of the utility model;

[0030] Fig.10 A schematic diagram of step S3 in the construction method of the grouting extrusion expansion anchor-pile structure provided by an embodiment of the utility model;

[0031] Fig.11 A schematic diagram of step S4 in the construction method of the grouting extrusion expansion anchor-pile structure provided by an embodiment of the utility model;

[0032] Fig.12 A schematic diagram of step S5 in the construction method of the grouting, squeezing and expanding anchor-pile structure provided by an embodiment of the utility model;

[0033] The description of each reference numeral is as follows:

[0034] 10-pile body; 101-bottom end plate;

[0035] 11-anchoring device; 110-connecting end plate; 111-free section; 112-anchoring section; 113-anchor rod; 114-grouting pipe; 115-hollow pipe; 116-first connecting piece; 117-second connecting piece; 118-third connecting piece; 1121-grouting device;

[0036] 12-bundle pulp bag; 121-stone body;

[0037] 13- annular pressure plate;

[0038] 14-pressure plate; 141-nut;

[0039] 15-through hole; 151-grouting pipe through hole; 152-anchor rod through hole;

[0040] 16-connection hole; 161-first connection hole; 162-second connection hole;

[0041] 17-first fastener; 18-second fastener; 19-construction hole. DETAILED DESCRIPTION

[0042] In order to make the purpose, advantages and features of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0043] As used in this specification, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "the proximal end" and "the distal end" generally refer to two corresponding parts, which include not only the endpoints, and the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in this specification, an element disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through an intermediate element, and it cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative position relationships arranged in the direction of gravity; the terms "vertical, vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground, and "horizontal, horizontal plane direction" generally refers to the direction parallel to the ground; for ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0044] The utility model aims to provide a grouting and expansion anchor-pile structure to solve the problems that the foundation structure in the prior art cannot take into account both pull-out resistance and compression resistance, and has low bearing efficiency, high material consumption and high comprehensive cost.

[0045] Please refer to Figures 1 to 6The utility model provides a grouting and extrusion anchor-pile structure, comprising: a pile body 10 and an anchoring device 11; a connecting end plate 110 is arranged in the middle of the anchoring device 11, the anchoring device 11 is penetrated into the interior of the pile body 10, and is connected to the bottom end plate 101 of the pile body 10 through the connecting end plate 110, and the connecting end plate 110 divides the anchoring device 11 into a free section 111 and an anchoring section 112, the free section 111 is located inside the pile body 10, the anchoring section 112 extends out of the pile body 10, and the free section 111 and the anchoring section 112 are detachably connected; the anchoring device 11 comprises a grouting bag 12, the grouting bag 12 is sleeved on the outer periphery of the anchoring section 112, and the grouting bag 12 is used to accommodate filling materials and extrude and expand outwards during installation to form a stone body 121 (such as Figure 1 and Figure 2 As shown), to provide bearing capacity. Those skilled in the art can understand that in the use scenario of the grouting and expansion anchor-pile structure provided in this embodiment, it is usually necessary to face compression conditions and pull-out conditions. When facing the above two conditions, the above structure is different in load transfer mode and bearing capacity source; under compression conditions, the load is transferred from the cap to the pile body 10, and then to the stone body 121, and its bearing capacity comes from the lateral resistance of the soil around the pile body 10, the lateral resistance of the soil around the stone body 121, and the end resistance of the soil at the bottom of the stone body 121; under pull-out conditions, the load is transferred from the cap through the anchor device 11 to the pressure plate 14 connecting the end plate 110 and the bottom, and is finally borne by the pile body 10 and the stone body 121, and its bearing capacity comes from the lateral resistance of the soil around the pile body 10 and the lateral resistance of the soil around the stone body 121. It should be noted that the filling material can be cement slurry, which can form a stone body 121 after hardening and expand the surrounding soil layer; the pile body 10 can be a prefabricated pipe pile or a steel pipe pile; in other embodiments, the filling material can also be other materials with the same function, and technical personnel in this field can configure this according to actual conditions.

[0046] With such configuration, the present application sets a pile body 10 and an anchoring device 11, connects the pile body 10 and the anchoring device 11 by connecting the end plate 110, and sets a grout bag 12 at the anchoring section 112 of the anchoring device 11, and forms a stone body 121 by grouting to squeeze the surrounding soil layer, thereby improving the interaction force between the anchoring device 11 and the soil layer, thereby improving the overall bearing capacity of the grouting and squeezing anchor-pile structure; at the same time, the anchoring device 11 mainly provides the pull-out bearing capacity, and the pile body 10 mainly provides the compressive bearing capacity, which gives full play to their respective advantages, improves the material utilization efficiency, and reduces the material consumption, and both the anchoring device 11 and the pile body 10 are constructed by factory prefabrication and on-site assembly technology, the free section 111 and the anchoring section 112 are detachably connected, the construction is simple and efficient, and the project cost can also be reduced.

[0047] Please refer to Figure 1 and Figure 3 The anchoring device 11 includes: an anchor rod 113 and a grouting pipe 114; the anchor rod 113 has a free section 111 and an anchoring section 112; the grouting pipe 114 is arranged parallel to the anchor rod 113, and the grouting pipe 114 is arranged inside the pile body 10, and extends from the connecting end plate 110 into the interior of the grouting bag 12, and is used to inject filling material into the grouting bag 12. In an optional embodiment, a grouting device 1121 is arranged at the bottom of the grouting pipe 114, and the grouting device 1121 can be a cylindrical component with a plurality of grouting holes on its side wall, which has a one-way check function, and the filling material flows to the bottom through the grouting pipe 114 and is injected into the grouting bag 12 through the grouting holes. It should be noted that when the above structure is used mainly for pull-out resistance and supplemented by compression resistance, the anchor rod 113 can be configured as a steel bar, and an additional grouting pipe 114 is required. With this configuration, the steel bar can provide a higher pull-out bearing capacity, and the pile body 10 can provide a higher compressive bearing capacity.

[0048] For further information, please refer to Figure 3 , the anchoring device 11 is also provided with a first connecting piece 116, and the anchor rod 113 includes two sections of steel bars, and the two sections of steel bars are connected by the first connecting piece 116 at the connection end plate 110. It should be noted that the first connecting piece 116 can be a sleeve, and the two sections of steel bars are connected by the sleeve, and the sleeve is provided with an internal thread that matches the thread of the steel bar to achieve a snap fit; with such a configuration, in the process of assembling the anchoring device 11 and the pile body 10, the detachable anchor rod 113 can effectively reduce the height of the pile body 10, ensuring safety while also improving construction efficiency. In some other embodiments, the two sections of steel bars can also be connected by welding, and those skilled in the art can reasonably configure the connection method of the steel bars according to actual conditions.

[0049] For further information, please refer to Figure 3 , the anchoring device 11 is also provided with a second connecting piece 117, and the grouting pipe 114 includes two sections of pipe fittings, and the two sections of pipe fittings are connected at the connecting end plate 110 by the second connecting piece 117. It should be noted that the second connecting piece 117 can be a connecting head, and the connecting head is provided with a cavity adapted to the diameter of the grouting pipe 114, and the two sections of pipe fittings are respectively inserted into the cavity to achieve connection; with such a configuration, the detachable grouting pipe 114 can effectively reduce the hanging height of the pile body 10, reduce the construction difficulty, improve the construction efficiency and ensure the construction safety. In other embodiments, the two sections of pipe fittings can also be welded or connected using other effective connection methods. Those skilled in the art can reasonably configure the connection method of the grouting pipe 114 according to actual conditions.

[0050] In another optional embodiment, please refer to Figure 2 and Figure 4The anchoring device 11 includes: a hollow pipe 115; the hollow pipe 115 includes a free section 111 and an anchoring section 112, the free section 111 is inserted into the interior of the pile body 10, a grouting device 1121 is provided at the bottom of the anchoring section 112, the interior of the hollow pipe 115 has a hollow tube cavity, the hollow tube cavity is used for the filling material to flow, and the grouting device 1121 is used for the filling material to be injected into the grouting bag 12. In an optional embodiment, a grouting device 1121 is provided at the bottom of the hollow pipe 115, and a grouting hole is provided on the side wall of the grouting device 1121, and the filling material flows from the hollow tube cavity to the grouting device 1121, and flows into the grouting bag 12 from the grouting hole, so that the grouting bag 12 is squeezed outward to form a stone body 121. It should be noted that when the above-mentioned structure is used mainly for compression resistance and supplemented by pull-out resistance, the anchor rod 113 can be configured as a hollow steel pipe, and the internal cavity of the hollow steel pipe is used as a circulation channel for the filling material. With this configuration, the hollow steel pipe can provide a part of the pull-out bearing capacity while meeting certain compressive bearing capacity requirements; in addition, the hollow pipe 115 can also serve as a grouting pipe 114, and there is no need to configure an additional grouting pipe 114, which can further reduce production costs.

[0051] For further information, please refer to Figure 4 , the anchoring device 11 is also provided with a third connecting piece 118, and the hollow pipe fitting 115 includes two sections of steel pipes, and the two sections of steel pipes are connected at the connecting end plate 110 by the third connecting piece 118. It should be noted that the third connecting piece 118 can be a connecting head, and the connecting head is provided with a cavity adapted to the diameter of the hollow steel pipe, and the two sections of steel pipes are respectively inserted into the cavity to achieve connection; with such a configuration, the detachable hollow pipe fitting 115 can effectively reduce the hanging height of the pile body 10, reduce the construction difficulty, and at the same time improve the construction efficiency and ensure the construction safety. In other embodiments, the two sections of steel pipes can also be connected by welding, and those skilled in the art can reasonably configure the connection method of the steel pipe according to the actual situation.

[0052] Please refer to Figures 1 to 6 In an alternative embodiment, the anchoring device 11 further comprises an annular pressure plate 13 and a pressure plate 14, wherein the annular pressure plate 13 is arranged on the side of the connecting end plate 110 away from the pile body 10, and the pressure plate 14 is arranged at the bottom of the anchoring section 112, and one end of the grout bag 12 is arranged between the connecting end plate 110 and the annular pressure plate 13, and the other end is fixed on the pressure plate 14. It should be noted that, as Figure 3 and Figure 4 As shown, the annular pressure plate 13 is located on the side of the connecting end plate 110 away from the pile body 10, and one end of the slurry bag 12 is arranged between the connecting end plate 110 and the annular pressure plate 13 to achieve the clamping and fixing of one end of the slurry bag 12; Figure 5 and Figure 6As shown, the pressure plate 14 is arranged at the bottom of the anchoring section 112, which is mainly used to bear the load from the superstructure, transfer the load to the stone body of the anchoring section, and realize the limit of the pressure plate 14 in the extension direction of the anchoring section 112 through two nuts 141 to fix the slurry bag 12. The two nuts 141 are respectively arranged on the side of the pressure plate 14 close to the grouting device 1211 and the side away from the grouting device 1211; at the same time, the other end of the slurry bag 12 can be fixed between the pressure plate 14 and the nut 141 on the side close to the grouting device 1211. Of course, in other embodiments, the connection relationship between the slurry bag 12 and the anchoring device 11 can also be glued or welded, and those skilled in the art can reasonably configure the connection relationship between the slurry bag 12 and the anchoring device 11 according to actual conditions.

[0053] Please refer to Figure 3 , Figure 4 as well as Figure 7 As an optional embodiment, the connecting end plate 110 is provided with a through hole 15 and a plurality of connecting holes 16. The through hole 15 is used for the anchor device 11 to pass through. The plurality of connecting holes 16 are arranged along the circumference of the connecting end plate 110 for fasteners to pass through to achieve the connection between the connecting end plate 110 and the bottom end plate 101 of the pile body 10 or to fix the grout bag 12. It should be noted that Figure 7 For example, the through hole 15 includes a grouting pipe through hole 151 and an anchor rod through hole 152, the grouting pipe 114 is inserted into the grouting pipe through hole 151, the anchor rod 113 is inserted into the anchor rod through hole 152, and at the same time, the first connecting member 116 is inserted into the anchor rod through hole 152, and the second connecting member 117 is inserted into the grouting pipe through hole 151 (such as Figure 3As shown). Further, in an alternative embodiment, the connection hole 16 includes a first connection hole 161 and a second connection hole 162, and the fastener includes a first fastener 17 and a second fastener 18. The first fastener 17 passes through the first connection hole 161 and is connected to the bottom end plate 101 of the pile body 10, and the second fastener 18 passes through the second connection hole 162 to connect the annular pressure plate 13 and the connection end plate 110, and fix the bundled pulp bag 12. In this embodiment, the first fastener 17 and the second fastener 18 are both bolts, and the aperture of the first connection hole 161 is larger than the aperture of the second connection hole 162. Accordingly, the outer diameter of the first fastener 17 is larger than the outer diameter of the second fastener 18. The first fastener 17 sequentially connects the annular pressure plate 13, the connecting end plate 110 and the bottom end plate 101 of the pile body 10 from bottom to top, thereby realizing the connection between the connecting end plate 110 and the bottom end plate 101 of the pile body 10, and further realizing the connection between the anchor device 11 and the pile body 10; the second fastener 18 sequentially connects the annular pressure plate 13 and the connecting end plate 110 from bottom to top, thereby realizing the connection between the annular pressure plate 13 and the connecting end plate 110, and further realizing the fixation of the slurry bag 12. In another embodiment, only one hollow pipe through hole can be set on the connecting end plate 110 for example Figure 4 The hollow tube member 115 and the third connecting member 118 are shown to pass through it.

[0054] Furthermore, a connecting through hole (not shown in the figure) is provided at a position corresponding to the first connecting hole 161 of the bottom end plate 101 of the pile body 10, a first internal thread (not shown in the figure) is provided in the connecting through hole, and the first fastener 17 is matched with the first internal thread to achieve connection; a second internal thread (not shown in the figure) is provided in the second connecting hole 162, and the second fastener 18 is matched with the second internal thread to achieve connection. It should be noted that the first connecting hole 161 is not provided with an internal thread, and only the first internal thread is provided in the connecting through hole on the bottom end plate 101 of the pile body 10, the first fastener 17 passes through the first connecting hole 161, and extends into the connecting through hole to engage with the first internal thread to achieve connection; the second connecting hole 162 is provided with a second internal thread, and the second fastener 18 extends into the second connecting hole 162 to engage with the second internal thread to achieve connection.

[0055] In another embodiment, please refer to Figures 8 to 12 This embodiment also provides a construction method of a grouting extrusion expansion anchor-pile structure, which is applied to the grouting extrusion expansion anchor-pile structure as described above, comprising:

[0056] Step S1: Prefabricate the pile body 10 and the anchoring device 11, and assemble the connecting end plate 110, the anchoring section 112 and the grout bag 12 in sequence (please refer to Figure 8 );

[0057] Step S2: forming a construction hole 19 on the ground, placing the assembled connection end plate 110, anchoring section 112 and grout bag 12 into the construction hole 19 (see Fig. 9 );

[0058] Step S3: hoist the pile body 10, connect the free section 111 with the anchor section 112, and connect the connecting end plate 110 with the bottom end plate 101 of the pile body 10 (please refer to Fig.10 );

[0059] Step S4: Sink the installed grouting and expansion anchor-pile structure into the designed elevation (please refer to Fig.11 );

[0060] Step S5: After the cement slurry in the construction hole 19 hardens, grout is injected into the grout bag 12 to form a stone body 121 (see Fig.12 ).

[0061] It should be noted that, in the present embodiment, the construction hole 19 can be formed by drilling a hole in the ground and injecting cement slurry or cement-soil replacement slurry into the hole, or by using a single-pile mixing pile machine to construct a cement mixing pile. The diameter of the construction hole 19 is about 100 mm larger than the diameter of the pile body 10. After the cement slurry in the construction hole 19 is initially hardened, the pre-assembled connection end plate 110 (including the annular pressure plate 13), the anchoring section 112 (including the pressure plate 14) and the slurry bag 12 can be placed in the construction hole 19, and the construction hole 19 can be made to sink for a certain distance (such as 10 mm) by its own weight or by applying a certain additional pressure. Fig. 9 Then, the pile body 10 and the free section 111 are placed on top, so that the free section 111 and the anchoring section 112 are connected to form a complete anchoring device 11, and the connecting end plate 110 is connected to the bottom end plate 101 of the pile body 10 to achieve the connection between the pile body 10 and the anchoring device 11 (as shown in FIG. Fig.10 As shown); then the entire structure is sunk to the designed elevation by a static pile driver or other components with the same function. After the cement slurry hardens, grout is injected into the slurry bag 12. The slurry bag 12 is squeezed outward to form a stone body 121 to provide bearing capacity by the resistance formed by squeezing the surrounding soil layer. With this configuration, the anchoring device 11 and the pile body 10 are both prefabricated in the factory and assembled on site. The free section 111 and the anchoring section 112 are detachably connected, which is simple and efficient to construct and can also reduce the project cost. Figures 8 to 12 In the embodiment, the anchoring device 11 is configured as follows Figure 1 The anchor rod 113 and the grouting pipe 114 shown in FIG. 1 may also be configured as follows in other embodiments: Figure 2 The hollow tube 115 shown is not limited to those skilled in the art.

[0062] In summary, the grouting and expansion anchor-pile structure provided in the embodiment of the utility model includes: a pile body and an anchoring device; a connecting end plate is arranged in the middle part of the anchoring device, the anchoring device is penetrated into the interior of the pile body, and is connected to the bottom end plate of the pile body through the connecting end plate, the connecting end plate divides the anchoring device into a free section and an anchoring section, the free section is located inside the pile body, the anchoring section extends out of the pile body, and the free section and the anchoring section are detachably connected; the anchoring device includes a grouting bag, which is sleeved on the outer periphery of the anchoring section, and the grouting bag is used to accommodate filling material and extrude it outward during the installation process to form a stone body to provide bearing capacity.

[0063] With such configuration, a pile body and an anchoring device are provided, the pile body and the anchoring device are connected by connecting end plates, and a grout bag is provided at the anchoring section of the anchoring device. The stone body is formed by grouting to squeeze the surrounding soil layer, thereby improving the interaction force between the anchoring device and the soil layer, thereby improving the overall bearing capacity of the grouting and squeezing anchor-pile structure; at the same time, the pull-out bearing capacity is mainly provided by the anchoring device, and the compressive bearing capacity is mainly provided by the pile body, so that their respective advantages are fully utilized, the material utilization efficiency is improved, and the material consumption is reduced. Moreover, both the anchoring device and the pile body are constructed by factory prefabrication and on-site assembly technology, the free section and the anchoring section are detachably connected, the construction is simple and efficient, and the project cost can also be reduced.

[0064] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A grouting and expansion anchor-pile structure, characterized in that: include: Pile body and anchoring device; A connecting end plate is provided in the middle of the anchoring device, the anchoring device is inserted into the interior of the pile body and connected to the bottom end plate of the pile body through the connecting end plate, the connecting end plate divides the anchoring device into a free section and an anchoring section, the free section is located inside the pile body, the anchoring section extends out of the pile body, and the free section and the anchoring section are detachably connected; The anchoring device comprises a slurry bag, which is sleeved on the outer circumference of the anchoring section. The slurry bag is used to accommodate filling material and expand it outwards to form a stone body during installation to provide bearing capacity.

2. The grouting and expansion anchor-pile structure according to claim 1, characterized in that: The anchoring device comprises: an anchor rod and a grouting pipe; The anchor rod has the free section and the anchoring section; the grouting pipe is arranged parallel to the anchor rod, the grouting pipe is passed through the interior of the pile body, and extends from the connecting end plate into the interior of the grout bag for injecting the filling material into the grout bag.

3. The grouting and expansion anchor-pile structure according to claim 2, characterized in that: The anchoring device is also provided with a first connecting member, and the anchor rod includes two sections of steel bars, and the two sections of the steel bars are connected at the connecting end plate through the first connecting member.

4. The grouting and expansion anchor-pile structure according to claim 2, characterized in that: The anchoring device is also provided with a second connecting piece, and the grouting pipe includes two sections of pipe fittings, and the two sections of the pipe fittings are connected at the connecting end plate through the second connecting piece.

5. The grouting and expansion anchor-pile structure according to claim 1, characterized in that: The anchoring device comprises: a hollow pipe; The hollow pipe member includes the free section and the anchoring section. The free section is inserted into the interior of the pile body. A grouting device is provided at the bottom of the anchoring section. The interior of the hollow pipe member has a hollow tube cavity, and the hollow tube cavity is used for the filling material to flow. The grouting device is used for injecting the filling material into the grout bag.

6. The grouting and expansion anchor-pile structure according to claim 5, characterized in that: The anchoring device is also provided with a third connecting piece, and the hollow pipe member includes two sections of steel pipes, and the two sections of the steel pipes are connected at the connecting end plate through the third connecting piece.

7. The grouting and expansion anchor-pile structure according to claim 1, characterized in that: The anchoring device also includes an annular pressure plate and a pressure plate. The annular pressure plate is arranged on the side of the connecting end plate away from the pile body, and the pressure plate is arranged at the bottom of the anchoring section. One end of the slurry bag is arranged between the connecting end plate and the annular pressure plate, and the other end is fixed to the pressure plate.

8. The grouting and expansion anchor-pile structure according to claim 7, characterized in that: The connecting end plate is provided with a through hole and a plurality of connecting holes, wherein the through hole is used for the anchor device to pass through, and the plurality of connecting holes are arranged along the circumference of the end plate for fasteners to pass through to achieve the connection between the connecting end plate and the bottom end plate of the pile body or to fix the grout bag.

9. The grouting and expansion anchor-pile structure according to claim 8, characterized in that: The connecting hole includes a first connecting hole and a second connecting hole, and the fastener includes a first fastener and a second fastener, the first fastener passes through the first connecting hole and is connected to the bottom end plate of the pile body, and the second fastener passes through the second connecting hole to connect the annular pressure plate and the end plate and fix the grout bag.

10. The grouting and expansion anchor-pile structure according to claim 9, characterized in that: A connecting through hole is provided at a position of the bottom end plate corresponding to the first connecting hole, a first internal thread is provided in the connecting through hole, and the first fastener is adapted to the first internal thread to achieve connection; a second internal thread is provided in the second connecting hole, and the second fastener is adapted to the second internal thread to achieve connection.

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