Hole digging pile reinforcement cage structure, hole digging pile and hole digging rock-socketed anchor rod foundation

Abstract

The utility model relates to the technical field of engineering construction, and provides a hole digging pile reinforcement cage structure, a hole digging pile and a hole digging rock-socketed anchor rod foundation. The anchor rods surround the bottom end of the reinforcement cage body, one ends of the anchor rods are connected with the reinforcement cage body, and the other ends of the anchor rods extend out of the bottom end of the reinforcement cage body; the formwork is hollow and used for being coaxially arranged in the reinforcement cage body; the end, close to the bottom end of the reinforcement cage body, of the formwork is suitable for providing bottom support, and the opposite end is provided with a supporting face suitable for providing top support. Thus, the length of the pile foundation is reduced, the engineering cost is reduced on the whole, environment damage and recovery cost caused by excavation are reduced, meanwhile, the excavation problem caused by the fact that the pile foundation is too long is effectively avoided, and the construction efficiency and safety are improved; and by using the hollow template, the pile foundation is of a hollow structure, the material cost is reduced, and the economical efficiency of the foundation and the feasibility of construction are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering construction, in particular to a bored pile reinforcement cage structure, a bored pile and a bored rock-embedded anchor foundation. Background Art

[0002] Among the many foundation types for transmission lines, rock anchor foundation and bored pile foundation are popular due to their wide applicability and reliability.

[0003] As transmission lines often cross natural terrain, bored pile foundations often rely on manual excavation, a process that may encounter challenges due to the hard nature of the rock after reaching a certain depth, making the excavation work complicated and time-consuming.

[0004] Another type of rock anchor foundation usually requires a larger pedestal and has certain restrictions on the thickness of the soil cover, which results in a relatively large amount of concrete used. Correspondingly, the cost and construction difficulty of the project also increase.

[0005] Therefore, how to reduce the difficulty of foundation construction, improve construction efficiency and reduce project cost has become an important issue that needs to be solved urgently. Utility Model Content

[0006] The utility model provides a bored pile steel cage structure, bored piles and bored rock-embedded anchor foundation, which are used to solve the defects of the prior art in that the foundation construction is difficult, the engineering cost is high and the construction efficiency is low, and has the advantages of low construction difficulty and engineering cost and high construction efficiency.

[0007] The utility model provides a bored pile reinforcement cage structure, comprising:

[0008] Steel cage body;

[0009] Anchor rods, a plurality of which are arranged around the bottom end of the steel cage body, one end of each anchor rod being connected to the steel cage body and the other end of each anchor rod extending out of the bottom end of the steel cage body;

[0010] The template is hollow inside and is used to be coaxially arranged in the steel cage body; one end of the template close to the bottom end of the steel cage body is suitable for providing bottom support, and the other end opposite is provided with a support surface, which is suitable for providing top support.

[0011] According to a bored pile reinforcement cage structure provided by the utility model, the reinforcement cage body comprises:

[0012] A plurality of foundation main reinforcement bars are provided, and the plurality of foundation main reinforcement bars are arranged in a ring shape;

[0013] The spiral stirrups are arranged around the outside of the ring formed by the plurality of foundation main bars and extend from the top to the bottom of the steel cage body; the spiral stirrups are fixedly connected to the foundation main bars.

[0014] According to a bored pile reinforcement cage structure provided by the utility model, the reinforcement cage body also includes:

[0015] A plurality of annular stirrups are arranged at intervals along the axial direction of the steel cage body. The annular stirrups are arranged on the inner side of the ring formed by the plurality of foundation main bars and are fixedly connected to the plurality of foundation main bars.

[0016] According to a bored pile reinforcement cage structure provided by the utility model, at least part of the foundation main reinforcement extends out of the end of the reinforcement cage body, and the part of the foundation main reinforcement extending out of the end of the reinforcement cage body forms the anchor rod.

[0017] According to a bored pile reinforcement cage structure provided by the utility model, the spiral stirrups and / or the annular stirrups are made of HPB300 grade plain round steel bars.

[0018] The utility model also provides a bored pile, comprising a pile body, wherein the pile body is cast by concrete and any one of the bored pile reinforcement cage structures described above; a hollow portion of the pile body is formed in the template, and the anchor rod extends out of the bottom end of the pile body.

[0019] A bored pile provided by the utility model also includes an anchor bolt anchored at the top of the pile body.

[0020] The utility model also provides a bored rock-embedded anchor foundation, comprising bedrock, and also comprising any one of the above-mentioned bored pile reinforcement cage structures or any one of the above-mentioned bored piles anchored on the bedrock.

[0021] According to a hole-dug rock-embedded anchor foundation provided by the utility model, an anchor hole is arranged on the bedrock, and the anchor rod is inserted into the anchor hole and anchored in the anchor hole through an anchor body.

[0022] According to the hole-digging rock-embedded anchor foundation provided by the utility model, the anchor body is formed by solidifying the anchoring liquid.

[0023] According to the hole-dug rock-embedded anchor foundation provided by the utility model, the diameter of the anchor hole is three times the diameter of the anchor.

[0024] The bored pile steel cage structure, bored pile and bored rock-embedded anchor foundation provided by the utility model effectively reduce the length requirement of the pile foundation by utilizing the excellent anchoring performance of the bedrock, which not only reduces the use of materials, but also reduces the manufacturing and transportation costs, thereby reducing the overall project cost; in addition, compared with the deep foundation design, a large amount of earth excavation work can be reduced, which not only reduces the manpower and machinery input required for excavation, but also reduces the environmental damage and restoration costs caused by excavation, while effectively avoiding the excavation difficulties caused by the excessive length of the pile foundation, and improving the construction efficiency and safety; the use of the hollow formwork makes the pile foundation present a hollow structure, which not only reduces the use of concrete and reduces the material cost, but also enhances the economy of the foundation and the feasibility of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0026] Figure 1 This is one of the structural schematic diagrams of the bored pile provided by the embodiment of the utility model;

[0027] Figure 2 This is the second structural schematic diagram of the bored pile provided by the embodiment of the utility model;

[0028] Figure 3 It is a structural schematic diagram of a template provided by an embodiment of the utility model;

[0029] Figure 4 This is the third structural schematic diagram of the bored pile provided by the embodiment of the utility model;

[0030] Figure 5 It is a structural schematic diagram of a bored pile provided by another embodiment of the utility model;

[0031] Figure 6 It is a structural schematic diagram of a hole-embedded rock anchor foundation provided by an embodiment of the utility model.

[0032] Reference numerals:

[0033] 10. Steel cage body; 100. Foundation main reinforcement; 101. Spiral stirrups; 102. Circular stirrups; 11. Anchor rods; 12. Formwork; 120. Support surface; 20. Pile body; 21. Anchor bolts; 30. Bedrock; 300. Anchor holes. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0035] In order to facilitate understanding of the bored pile reinforcement cage structure, bored pile and bored rock anchor foundation provided by the utility model, their application background is first explained. Among the various foundation types of power transmission lines, rock anchor foundation and bored pile foundation are highly favored due to their wide applicability.

[0036] Bored pile foundations often rely on manual excavation, a process that may encounter challenges due to the hard nature of the rock after reaching a certain depth, making the excavation work complicated and time-consuming; rock anchor foundations usually require a larger pedestal and have certain restrictions on the thickness of the soil cover, which leads to a relatively large amount of concrete used. Correspondingly, the cost and construction difficulty of the project also increase.

[0037] Therefore, how to reduce the difficulty of foundation construction, improve construction efficiency and reduce project cost has become an important issue that needs to be solved urgently.

[0038] It was found in actual construction that in the design of bored pile foundation, the resistance to uplift force mainly depends on the friction between the pile and the soil. According to the uplift calculation formula, the concrete at the center of the pile bottom does not actually participate in the load-bearing. This means that unnecessary concrete use can be reduced by optimizing the design, thereby reducing material costs and alleviating the environmental burden.

[0039] Based on the above problems and findings, the utility model provides a bored pile reinforcement cage structure, bored piles and bored rock-embedded anchor foundation, which have the advantages of low construction difficulty and engineering cost and high construction efficiency.

[0040] Combine the following Figures 1 to 6 The utility model describes a bored pile reinforcement cage structure, a bored pile and a bored rock-embedded anchor foundation.

[0041] Reference Figure 1 and Figure 2A bored pile reinforcement cage structure includes a reinforcement cage body 10, anchor rods 11 and a template 12; wherein, a plurality of anchor rods 11 are arranged around the bottom end of the reinforcement cage body 10, one end of the anchor rod 11 is connected to the reinforcement cage body 10, and the other end extends out of the bottom end of the reinforcement cage body 10; the template 12 is hollow inside and is suitable for being coaxially arranged in the reinforcement cage body 10, one end of the template 12 close to the bottom end of the reinforcement cage body 10 is suitable for providing bottom support, and the other end opposite thereto is provided with a support surface 120, which is suitable for providing top support.

[0042] In an actual application scenario, when carrying out infrastructure construction, the bedrock 30 is first excavated to ensure that the bedrock 30 at the bottom of the hole reaches a medium weathering grade or above to meet the requirements of anchoring strength. The steel cage body 10 is installed in the hole, and the anchor rod 11 at the bottom of the steel cage body 10 is anchored in the bedrock 30. Then the formwork 12 is placed in the steel cage body 10, and the bottom of the formwork 12 is supported on the bedrock 30 to provide bottom support. Concrete is poured to form a pile foundation. The support surface 120 on the top of the formwork 12 is used to provide top support for the concrete above, and the cavity inside the formwork 12 is formed as a hollow part in the pile foundation.

[0043] Compared with related technologies, by utilizing the excellent anchoring performance of the bedrock 30, the length requirement of the pile foundation is effectively reduced, which not only reduces the use of materials, but also reduces the manufacturing and transportation costs, thereby reducing the overall project cost; in addition, compared with the deep foundation design, a large amount of earth excavation work can be reduced, which not only reduces the manpower and machinery input required for excavation, but also reduces the environmental damage and restoration costs caused by excavation, while effectively avoiding the excavation difficulties caused by the excessive length of the pile foundation, and improving construction efficiency and safety; the use of the hollow formwork 12 makes the pile foundation present a hollow structure, which not only reduces the use of concrete and reduces material costs, but also enhances the economy of the foundation and the feasibility of construction.

[0044] In a specific embodiment of the present invention, referring to Figure 1 and Figure 2 The steel cage body 10 includes foundation main bars 100 and spiral stirrups 101; wherein, a plurality of foundation main bars 100 are provided, and the plurality of foundation main bars 100 are arranged in a ring shape; the spiral stirrups 101 are spirally shaped, which surround the outside of the ring formed by the plurality of foundation main bars 100, and extend from the top end to the bottom end of the steel cage body 10, and the spiral stirrups 101 are fixedly connected to the foundation main bars 100.

[0045] In some embodiments, the number, arrangement and specification parameters of the foundation main reinforcement 100 can be selected. For example, each steel cage body 10 can include 16-28 foundation main reinforcements 100 of the same diameter. The diameter of the foundation main reinforcement 100 can be selected as 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, etc. The material is HRB400 and above threaded steel. The ring structure formed by the arrangement of multiple foundation main reinforcements 100 can be a circular ring or a polygonal ring, which can be configured according to the actual construction scenario and engineering requirements.

[0046] Similarly, the specification parameters of the spiral stirrups 101 and the method of fixing them to the foundation main reinforcement 100 are also selectable. For example, the spiral stirrups 101 can be made of steel bars with a diameter of 6 mm or 8 mm, and specifically HPB300 grade round steel bars can be used; the spiral stirrups 101 and the foundation main reinforcement 100 can be fixedly connected by binding, or they can be fixed by other methods, and can be specifically configured according to the actual construction scenario and engineering requirements.

[0047] In order to improve the overall stiffness of the steel cage body 10, the steel cage body 10 also includes annular stirrups 102. A plurality of annular stirrups 102 are arranged at intervals along the axial direction of the steel cage body 10. The annular stirrups 102 are arranged on the inner side of the ring formed by the plurality of basic main bars 100 and are fixedly connected to the plurality of basic main bars 100.

[0048] The material, number and specification parameters of the annular stirrups 102 can be flexibly configured according to actual engineering requirements. In a specific embodiment of the utility model, the annular stirrups 102 are made of HPB300 grade plain round steel bars and are arranged every 2 meters.

[0049] In an actual application scenario, multiple foundation main reinforcements 100 with the same diameter are arranged in a ring, and then bolt stirrups are wrapped around the outside of the ring formed by the multiple foundation main reinforcements 100, and annular stirrups 102 are arranged on the inside of the ring formed by the multiple foundation main reinforcements 100. Annular stirrups 102 are arranged every 2 meters, and the foundation main reinforcements 100, spiral stirrups 101 and annular stirrups 102 are tied together by tying to form a steel cage body 10.

[0050] In a specific embodiment of the present invention, the upper end of the foundation main reinforcement 100 is flat, so that the upper end of the steel cage body 10 remains flat, and the lower end is long and short, and the longer foundation main reinforcement 100 extends out of the bottom end of the steel cage body 10, and the part of the foundation main reinforcement 100 extending out of the bottom end of the steel cage body 10 forms the above-mentioned anchor rod 11.

[0051] The specific number and extension length of the anchor rods 11 can be selected according to actual engineering requirements. In this embodiment, an anchor rod 11 is set on every 2-4 foundation main bars 100, and the length of the anchor rod 11 is not less than the minimum construction depth required by the rock anchor rod 11 specification.

[0052] It is understandable that the anchor rods 11 are not limited to the above-mentioned numbers, layout methods and formation methods, and anchor rods 11 of other structures or forms are also applicable as long as the desired anchoring effect can be achieved.

[0053] The template 12 provided by the present invention will be described below in conjunction with the accompanying drawings.

[0054] Reference Figure 2-Figure 4 The cross-sectional shape of the template 12 is the same as that of the steel cage body 10, and the cross-sectional area of ​​the template 12 is smaller than that of the steel cage body 10, so as to facilitate the installation of the template 12 in the steel cage body 10. Taking the steel cage body 10 with a circular cross-section as an example, the template 12 is cylindrical as a whole, and the specific specifications of the template 12, such as diameter and height, can be flexibly designed according to the needs of the actual project. After the template 12 is installed in the steel cage body 10, the two are coaxial, and the bottom of the template 12 is supported on the bedrock 30 to form a bottom support. After the concrete is poured, the support surface 120 on the top of the template 12 is used to provide support for the concrete on the top.

[0055] In a specific embodiment of the present invention, the template 12 can be made of Q235 or Q355 steel, or other high-strength materials, to ensure that it has sufficient strength to support the concrete above and prevent the template 12 from collapsing.

[0056] By introducing the hollow formwork 12, the formed pile foundation presents a structure with a hollow bottom, which not only reduces the amount of concrete used and reduces the material cost, but also enhances the economy of the foundation and the feasibility of construction.

[0057] It can be understood that the cross-sectional shape of the template 12 can be the same as the cross-sectional shape of the steel cage body 10 but is not necessarily the same. In other embodiments, the cross-sectional shape of the steel cage body 10 can be polygonal and the cross-sectional shape of the template 12 can be circular, or the cross-sectional shape of the steel cage body 10 can be circular and the cross-sectional shape of the template 12 can be polygonal. No matter what shape of the steel cage body 10 and the mold are matched, as long as the formed pile foundation can present a hollow structure at the bottom and meet the required performance requirements.

[0058] The bored pile provided by the utility model is described below. The bored pile described below and the bored pile reinforcement cage structure described above can be referred to each other.

[0059] Reference Figure 4A bored pile includes a pile body 20, which is cast by concrete and the above-mentioned bored pile steel cage structure. The cavity in the template 12 forms a hollow part of the pile body 20, and the anchor rod 11 extends out of the bottom end of the pile body 20.

[0060] In a specific embodiment of the utility model, the bored pile also includes an anchor bolt 21, which is arranged at the top of the pile body 20 and is used to be connected to the upper iron tower. The bottom of the anchor bolt 21 is pre-buried in the pile body 20 to ensure the stability of the structure.

[0061] It should be noted that when designing the height of the template 12 , it is necessary to ensure that the thickness of the concrete above the template 12 after pouring is completed meets the anchoring requirements of the anchor bolts 21 .

[0062] It should be noted that the steel cage body 10 and the bored pile formed by casting include but are not limited to the shapes or structures listed above. Figure 5 The bottom end of the steel cage body 10 is gradually expanded, and correspondingly, the bottom end of the poured pile body 20 is gradually expanded to form a large end. Such an arrangement is more conducive to the upward pulling and downward pressing of the pile foundation, thereby further reducing the amount of engineering work.

[0063] The following is a description of the bored rock-embedded anchor foundation provided by the present invention. The bored rock-embedded anchor foundation described below and the bored pile reinforcement cage structure and bored pile described above can be referred to each other.

[0064] Reference Figure 6 A bored rock-embedded anchor foundation includes a bedrock 30 and the above-mentioned bored pile steel cage structure or bored pile anchored on the bedrock 30.

[0065] In a specific embodiment of the present invention, an anchor hole 300 is provided on the bedrock 30 , and the anchor rod 11 is inserted into the anchor hole 300 and anchored in the anchor hole 300 through an anchor body.

[0066] Specifically, the diameter of the anchor hole 300 is three times the diameter of the anchor rod 11 .

[0067] Specifically, the anchor body is formed by solidifying the anchoring liquid, and the specific material of the anchoring liquid can be flexibly selected according to factors such as the construction environment and the anchoring strength.

[0068] The construction steps of the hole-embedded rock anchor foundation are as follows:

[0069] S1. Excavation of bedrock 30: According to the design drawings, accurately excavate holes of the required size to ensure that the bedrock 30 at the bottom of the hole reaches a medium weathering grade or above to meet the requirements of anchoring strength.

[0070] S2. The steel cage body 10 is manufactured by tying the foundation main reinforcement 100, spiral stirrups 101 and annular stirrups 102 to form the steel cage body 10, wherein the foundation main reinforcement 100 is arranged in a ring shape, with the upper ends maintaining the same height and the lower ends being longer and shorter. The part of the foundation main reinforcement 100 at the longer lower end extending out of the steel cage body 10 is formed as the anchor rod 11.

[0071] S3, positioning and installing the anchor rod 11. Position the anchor rod 11 at the bottom of the foundation pit according to the drawings and drill the anchor hole 300. After the anchor hole 300 is drilled, put the steel cage body 10 into the hole to ensure that the anchor rod 11 is accurately inserted into the anchor hole 300.

[0072] S4, grouting of the anchor hole 300. After the steel cage body 10 is placed in place, an anchoring liquid is injected into the anchor hole 300 to ensure stable anchoring of the anchor rod 11. The anchoring liquid can also seal the anchor hole 300 to enhance the sealing and durability of the overall structure.

[0073] S5, install the formwork 12 and pour concrete, place the hollow formwork 12 into the steel cage body 10 and make the two coaxial, pour concrete to form a pile body 20 with a hollow bottom, and embed the anchor bolts 21 in the top of the pile body 20 for connecting the upper iron tower, thereby completing the construction of the hole-embedded rock anchor foundation.

[0074] The novelty of the present invention is that by utilizing the excellent anchoring performance of the bedrock 30, the length requirement of the pile foundation is effectively reduced, which not only reduces the use of materials, but also reduces the manufacturing and transportation costs, thereby reducing the overall project cost; in addition, compared with the deep foundation design, a large amount of earth excavation work can be reduced, which not only reduces the manpower and machinery investment required for excavation, but also reduces the environmental damage and restoration costs caused by excavation, while effectively avoiding the excavation difficulties caused by the excessive length of the pile foundation, and improving construction efficiency and safety; the use of the hollow formwork 12 makes the pile foundation present a hollow structure, which not only reduces the use of concrete and reduces material costs, but also enhances the economy of the foundation and the feasibility of construction.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A bored pile reinforcement cage structure, characterized in that: include: A steel cage body (10); A plurality of anchor rods (11) are arranged around the bottom end of the steel cage body (10), one end of the anchor rod (11) is connected to the steel cage body (10), and the other end extends out of the bottom end of the steel cage body (10); The template (12) is hollow inside and is used to be coaxially arranged in the steel cage body (10); one end of the template (12) close to the bottom end of the steel cage body (10) is suitable for providing bottom support, and the other end opposite is provided with a support surface (120) suitable for providing top support.

2. The bored pile reinforcement cage structure according to claim 1, characterized in that: The steel cage body (10) comprises: A plurality of foundation main reinforcement bars (100) are provided, and the plurality of foundation main reinforcement bars (100) are arranged in a ring shape; The spiral stirrup (101) is arranged around the outside of the ring formed by the plurality of the foundation main bars (100) and extends from the top to the bottom of the steel cage body (10); the spiral stirrup (101) is fixedly connected to the foundation main bars (100).

3. The bored pile reinforcement cage structure according to claim 2 is characterized in that: The steel cage body (10) further comprises: A plurality of annular stirrups (102) are arranged at intervals along the axial direction of the steel cage body (10); the annular stirrups (102) are arranged inside the ring formed by the plurality of basic main bars (100) and are fixedly connected to the plurality of basic main bars (100).

4. The bored pile reinforcement cage structure according to claim 2, characterized in that: At least part of the basic main reinforcement (100) extends out of the end of the reinforcement cage body (10), and the part of the basic main reinforcement (100) extending out of the end of the reinforcement cage body (10) forms the anchor rod (11).

5. The bored pile reinforcement cage structure according to claim 3 is characterized in that: The spiral stirrups (101) and / or the annular stirrups (102) are made of HPB300 grade plain round steel bars.

6. A bored pile, characterized in that: The pile body (20) is cast by concrete and the bored pile reinforcement cage structure according to any one of claims 1 to 5; The cavity inside the template (12) forms a hollow portion of the pile body (20), and the anchor rod (11) extends out of the bottom end of the pile body (20).

7. The bored pile according to claim 6, characterized in that: It also includes a foundation bolt (21) anchored at the top of the pile body (20).

8. A hole-embedded rock anchor foundation, characterized in that: It comprises bedrock (30), and also comprises a bored pile reinforcement cage structure as described in any one of claims 1 to 5 or a bored pile as described in any one of claims 6 to 7 anchored on the bedrock (30).

9. The hole-embedded rock anchor foundation according to claim 8, characterized in that: An anchor hole (300) is provided on the bedrock (30), and the anchor rod (11) is inserted into the anchor hole (300) and anchored in the anchor hole (300) through an anchor body.

10. The hole-embedded rock anchor foundation according to claim 9, characterized in that: The diameter of the anchor hole (300) is three times the diameter of the anchor rod (11).

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