Tubular pile penetrating anti-pulling anchor rod
By adopting a pipe-through pile-up anchor structure in the anti-floating anchor, including pipe piles, anchors and cement mortar bodies, the problems of poor use and high cost of traditional anti-floating anchors and anti-floating piles under the conditions of the Fourth-System soil layer and hard rock formations are solved, and the effects of improving structural stiffness, shortening of construction period, cost saving and improving foundation bearing capacity are achieved.
Patent Information
- Application Number
- CN202420408933.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-04
AI Technical Summary
Under the conditions of thicker Quaternary soil layer and hard rock below the base, traditional floating anchors and floating piles have poor use effects and high cost, which is difficult to meet the requirements of safety, economical and fast construction.
Pipe-through pile resistant anchor rods are used. This structure includes pipe piles, anchor rods and cement mortar bodies. Through pipe piles, they penetrate into the silt soil layer and reach the bedrock layer. The anchor bore hole penetrates the bottom end of the pipe pile and extends into the bedrock. The cement mortar body is poured between the cavity and the anchor rod to enhance anchoring.
The stiffness of the pull-resistant components is improved, the deformation caused by the pull-out force is reduced, the reliability of the anchor rod is ensured, the risk of corrosion is reduced, the construction period is shortened, labor costs are saved, and the foundation bearing capacity is improved.
Smart Images
Figure CN222594823U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pull-out anchor rods, in particular to a pipe-penetrating pile pull-out anchor rod. Background Art
[0002] In engineering construction, the anti-floating of underground structures is an important factor affecting the quality of the project. Commonly used anti-floating components include anti-floating piles and anti-floating anchors. When the base is hard rock such as granite, anti-floating anchors are often used. When there is a thick Quaternary soil layer below the base, anti-floating piles are often used.
[0003] In coastal and riverside areas, there is often a special stratum, that is, there is a thick Quaternary soil layer below the base, such as silt or loose sand layer, and the lower part is hard rock such as granite and andesite. In this stratum, if anti-floating anchor rods are used, the length of the anchor rods will be longer, and the effect of the anti-floating anchor rods will also be reduced due to the influence of silt creep; if prefabricated piles are used as anti-floating piles, it is difficult for the prefabricated piles to penetrate the bedrock, and the embedding depth of the anti-pullout piles is difficult to meet the anti-floating requirements; if bored cast-in-place piles are used as anti-floating piles, the project cost is often higher and the construction period is longer.
[0004] Therefore, facing this kind of stratum with Quaternary soil layer overlying and hard rock underlying, finding a safe, economical and quick-to-construct anti-floating component is one of the meaningful topics in the geotechnical field. Utility Model Content
[0005] In view of the shortcomings existing in the relevant technology, the utility model provides a through-pipe pile anti-pull-out anchor rod, which has the characteristics of simple structure, easy use, strong reliability and strong corrosion resistance, and solves the technical problems of poor use effect and high cost of traditional anti-floating anchor rods.
[0006] The utility model provides a pipe-penetrating pile anti-pullout anchor rod, comprising:
[0007] A pipe pile, comprising a pipe pile body and a cavity provided in the pipe pile body, wherein the pipe pile body is driven into a silty soil layer until the bottom end of the pipe pile body reaches the bedrock layer, and an anchor hole is drilled in the pipe pile body to form the anchor hole, wherein the anchor hole penetrates the bottom end of the pipe pile body and extends into the bedrock layer at the bottom end of the pipe pile body;
[0008] An anchor rod is arranged in the cavity in the pipe pile body and the anchor rod borehole, the anchor rod comprises a first section embedded in the pipe pile body and a second section embedded in the bedrock layer; the top end of the anchor rod is anchored and connected to the bottom plate of the underground structure;
[0009] A cement mortar body is poured into the gap between the cavity and the anchor rod so that the anchor rod is anchored in the cement mortar body;
[0010] Among them, the anchor rod is used to transmit anti-pullout force. After the buoyancy is generated, the buoyancy borne by the base plate of the underground structure is transmitted to the bedrock layer through the anchor rod; the cement mortar body is used to provide a gripping force so that the anti-buoyancy force is transmitted to the bedrock layer through the anchor rod; the pipe pile is used to bear the load and share the buoyancy with the anchor rod.
[0011] In some of the embodiments, the anchor rod bore is arranged corresponding to an inner hole of the pipe pile formed at the center of the cavity.
[0012] In some embodiments, the inner diameter of the pipe pile is not less than 200 mm, and the outer diameter of the pipe pile is not less than 400 mm.
[0013] In some embodiments, the anchor rod is a prestressed steel strand or a common steel bar.
[0014] In some embodiments, the diameter of the prestressed steel strand is not less than 15.2 mm, and the diameter of the ordinary steel bar is not less than 25 mm.
[0015] In some embodiments, 3 to 4 anchor rods are provided, and the length of each anchor rod is 5 to 15 m.
[0016] In some of the embodiments, the strength grade of cement in the cement mortar is not less than 30 MPa.
[0017] Compared with the prior art, the advantages and beneficial effects of the utility model are:
[0018] 1. The utility model provides a through-tube pile anti-pullout anchor rod, which comprises a pipe pile, an anchor rod and a cement mortar body; wherein, compared with conventional anti-pullout piles and anti-floating anchor rods, the anchor rod in the through-tube pile anti-pullout anchor rod is divided into two parts, the upper part is located in the pipe pile, and the lower part is located in the bedrock layer. The upper part of the anchor rod and the pipe pile are cast together by cement mortar, which enhances the rigidity of the anti-pullout component and reduces the deformation caused by the pulling force; for the lower part of the anchor rod, the anchor drilling machine can quickly drill into the rock layer, and the rock layer can provide a higher anchoring force to ensure the reliability of the anchor rod;
[0019] 2. The utility model provides a through-tube pile anti-pullout anchor rod, which has a compact structure and good anti-seepage performance, and can protect the internal anchor rod from corrosion for a long time, so as to avoid the strong corrosion of groundwater in coastal strata to concrete;
[0020] 3. The utility model provides a through-tube pile pull-out anchor rod, in which the pipe pile can easily penetrate the Quaternary soil layers such as silt, but is not easy to enter the hard rock; at the same time, during the anchor rod construction, the pipe pile can play the role of drilling wall protection, prevent the silt soil layer and sand layer from collapsing during the drilling process, and improve the quality of the anchor rod;
[0021] 4. The utility model provides a through-pipe pile anti-pullout anchor rod, in which the pipe pile has high rigidity. If the through-pipe anti-pullout anchor rod process is adopted, the pipe pile can be used as an auxiliary component to bear the upper load together with other piles, reduce uneven settlement, reduce the risk of cracking of the basement floor of the underground garage, and improve the bearing capacity of the foundation;
[0022] 5. The utility model provides a through-pipe pile anti-pullout anchor rod, which is produced according to the requirements of anti-floating of underground structures and has strong practicality; from the perspective of construction period, compared with ordinary anti-pullout piles, the through-pipe pile anti-pullout anchor rod can greatly shorten the construction period; from the perspective of cost, the through-pipe pile anti-pullout anchor rod does not need to adopt high-cost construction methods such as rotary drilling rigs, which greatly saves labor costs; from the perspective of force, the pipe piles in the through-pipe pile anti-pullout anchor rod can be used as auxiliary components to bear part of the plastic load, reduce foundation deformation, and reduce the risk of bottom plate cracking; in addition, due to the presence of pipe piles, the rigidity of the anti-pullout component is greatly improved, and the deformation of the bottom plate can be reduced under the action of pull-out force. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0024] Figure 1 The present invention is a schematic structural diagram of the anti-pullout anchor rod of the pipe pile provided by the present invention.
[0025] In the above drawings, the meanings of the various reference numerals are as follows:
[0026] 1. Pipe piles; 2. Anchor rods; 3. Cement mortar; 4. Underground structure base plate; 5. Cushion layer; 6. Silt soil layer; 7. Bedrock layer. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0029] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.
[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0031] The utility model provides a housing flipping device, Figure 1 The figure is a schematic diagram of the overall structure of the anti-pullout anchor rod of the pipe pile according to the embodiment of the utility model. Figure 1As shown, the through-tube pile anti-pullout anchor at least comprises: a pipe pile 1, an anchor 2 and a cement mortar body 3; wherein the pipe pile 1 is a hollow tubular structure, the pipe pile 1 comprises a pipe pile body and a cavity arranged in the pipe pile body, and an anchor borehole is formed by driving the pipe pile body into a silty soil layer 6 and the bottom end of the pipe pile body reaches the bedrock layer 7, and a hole is drilled in the pipe pile body, and the anchor borehole penetrates the bottom end of the pipe pile body and extends into the bedrock layer 7 at the bottom end of the pipe pile body; the pipe pile 1 has a high rigidity, and if the through-tube anti-pullout anchor process is adopted, the pipe pile 1 can be used as an auxiliary component, and together with other piles, it can bear the upper load, reduce uneven settlement, reduce the risk of cracking of the floor of the underground garage, and improve the bearing capacity of the foundation; the anchor 2 is arranged in the cavity and the anchor borehole in the pipe pile body, and the anchor 2 comprises a first section embedded in the pipe pile body and a second section embedded in the bedrock layer 7, and the anchor 2 in the through-tube pile anti-pullout anchor It is divided into two parts, the upper part is located in the pipe pile 1, and the lower part is located in the bedrock layer 7. The upper anchor rod 2 and the pipe pile 1 are cast together with cement mortar, which enhances the rigidity of the pull-out component and reduces the deformation caused by the pull-out force; for the lower anchor rod 2, the anchor drill can quickly drill into the bedrock layer 7, and the bedrock layer 7 can provide a higher anchoring force to ensure the reliability of the anchor rod 2; the top of the anchor rod 2 is anchored to the underground structure floor 4; the cement mortar body 3 is cast in the gap between the cavity and the anchor rod 2, so that the anchor rod 2 is anchored in the cement mortar body 3; the anchor rod 2 is used to transmit the pull-out force, and after the buoyancy is generated, the buoyancy borne by the underground structure floor 4 is transmitted to the bedrock layer 7 through the anchor rod 2; the cement mortar body 3 is used to provide a gripping force, so that the anti-buoyancy force is transmitted to the bedrock layer 7 through the anchor rod 2; the pipe pile 1 is used to bear the load and share the buoyancy with the anchor rod 2.
[0032] Among them, reference Figure 1 The anchor rod drilling hole is arranged corresponding to the inner hole of the pipe pile formed at the central position of the cavity, so that the anchor rod 2 passes through the pipe pile 1 and enters the anchor rod drilling hole.
[0033] Among them, reference Figure 1 , the pipe pile 1 is a prefabricated pipe pile, the inner diameter of the pipe pile 1 should be convenient for the construction of the anchor rod inside the pipe pile, the inner diameter of the pipe pile 1 is not less than 200mm, and the outer diameter of the pipe pile 1 is not less than 400mm.
[0034] Among them, reference Figure 1 The anchor rod 2 is a prestressed steel strand or a common steel bar. Further, the diameter of the prestressed steel strand is not less than 15.2 mm, and the diameter of the common steel bar is not less than 25 mm; 3 to 4 anchor rods 2 are provided, and the length of each anchor rod 2 is 5 to 15 m.
[0035] Among them, reference Figure 1 , the strength grade of cement in the cement mortar body 3 is not less than 30MPa.
[0036] The following is combined with Figure 1The working process of the anti-pullout anchor rod of the pipe pile provided by the utility model is described as follows:
[0037] (1) Prefabricated pipe piles are selected, and the inner diameter of the pipe pile 1 should be convenient for the construction of anchor rods in the pipe pile;
[0038] (2) Leveling the site and constructing precast piles. The precast piles must pass through the Quaternary soil layer, and the bottom of the pipe pile 1 must reach the bedrock layer;
[0039] (3) Anchor bolt 2 construction, the anchor bolt hole coincides with the inner hole of the pipe pile, the anchor bolt hole penetrates the pipe pile 1 and enters the bedrock layer 7 to a certain depth, and the soil layer and rock debris in the hole are removed;
[0040] (4) Anchor rod 2 is placed in the anchor rod drill hole, and cement mortar or cement slurry is poured to complete the construction of the through-tube anti-pullout anchor rod; in addition, anchor rod 2 can be a prestressed anchor rod anchored in the base plate 4 of the underground structure.
[0041] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0042] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.
Claims
1. Pipe pile anti-pullout anchor, characterized in that: include: A pipe pile, comprising a pipe pile body and a cavity provided in the pipe pile body, wherein the pipe pile body is driven into a silty soil layer until the bottom end of the pipe pile body reaches the bedrock layer, and an anchor hole is drilled in the pipe pile body to form the anchor hole, wherein the anchor hole penetrates the bottom end of the pipe pile body and extends into the bedrock layer at the bottom end of the pipe pile body; An anchor rod is arranged in the cavity in the pipe pile body and the anchor rod borehole, the anchor rod comprises a first section embedded in the pipe pile body and a second section embedded in the bedrock layer; the top end of the anchor rod is anchored and connected to the bottom plate of the underground structure; A cement mortar body is poured into the gap between the cavity and the anchor rod so that the anchor rod is anchored in the cement mortar body; Among them, the anchor rod is used to transmit anti-pullout force. After the buoyancy is generated, the buoyancy borne by the base plate of the underground structure is transmitted to the bedrock layer through the anchor rod; the cement mortar body is used to provide a gripping force so that the anti-buoyancy force is transmitted to the bedrock layer through the anchor rod; the pipe pile is used to bear the load and share the buoyancy with the anchor rod.
2. The anti-pullout anchor rod of the pipe pile according to claim 1 is characterized in that: The anchor rod borehole is arranged corresponding to the inner hole of the pipe pile formed at the central position of the cavity.
3. The anti-pullout anchor rod of the pipe pile according to claim 1 is characterized in that: The inner diameter of the pipe pile is not less than 200 mm, and the outer diameter of the pipe pile is not less than 400 mm.
4. The anti-pullout anchor rod of the pipe pile according to claim 1 is characterized in that: The anchor rod is a prestressed steel strand or an ordinary steel bar.
5. The anti-pullout anchor rod of the pipe pile according to claim 4 is characterized in that: The diameter of the prestressed steel strand is not less than 15.2 mm, and the diameter of the ordinary steel bar is not less than 25 mm.
6. The anti-pullout anchor rod of the pipe pile according to claim 1, characterized in that: A total of 3 to 4 anchor rods are provided, and the length of each anchor rod is 5 to 15 m.
7. The anti-pullout anchor rod of the pipe pile according to claim 1 is characterized in that: The strength grade of cement in the cement mortar is not less than 30MPa.