Anchoring structure of anchor rod and side wall of foundation pit

Abstract

The utility model relates to an anchor rod structure and anchor installation structure of foundation pit side wall, be applicable to the field of building construction technology, the utility model adopts the technical scheme: an anchor rod structure has: glass steel rod cover, first internal thread is arranged on glass steel rod cover inner wall, metal rod inner core can be inserted in glass steel rod cover, the end of metal rod inner core can extend to glass steel rod cover outside, the first external thread that cooperates with first internal thread is arranged on metal rod inner core outer wall, anchor fastening spare can be installed on the metal rod inner core that extends to glass steel rod cover outside, and anchor fastening spare abuts in glass steel rod cover end portion, so, after installing in glass steel rod cover through the thread cooperation of metal rod inner core, install the anchor fastening spare that abuts in anchor fastening spare glass steel rod cover end portion on the metal rod inner core that extends to glass steel rod cover outside, make glass steel rod cover, metal rod inner core and anchor fastening spare constitute a whole, strengthen the connecting strength of glass steel rod cover, metal rod inner core.

Description

Technical Field

[0001] This utility model relates to an anchor bolt structure and an anchoring structure for the sidewall of a foundation pit. It is applicable to the field of building construction technology. Background Technology

[0002] In the construction of foundation pit support projects, anchor bolts play a multifaceted and crucial role through their synergistic interaction with the surrounding soil and rock mass: they can apply prestress to actively constrain foundation pit displacement, transfer the earth pressure and water pressure borne by the retaining structure to the deep stable soil and rock mass, and enhance the overturning resistance of the retaining structure; at the same time, they can reinforce the slope, connect the loose surface soil mass with the underlying stable soil layer to form a whole, improve the shear strength of the soil mass, effectively adapt to complex geological conditions such as soft soil and water-rich strata, and ensure the safety of the project.

[0003] Existing technical solutions are as follows: Traditional technology 1: using wooden and bamboo anchors. These anchors are rarely used due to their low strength and poor corrosion resistance. Traditional technology 2: using steel anchors. Although these anchors improve shear, torsion, and bending resistance, with the rapid development of urban underground space, there are more and more cases where they are adjacent to buildings or tunnels. After the foundation pit is completed, the steel anchors are left in the foundation, causing underground environmental pollution and becoming obstacles to the construction of subsequent nearby building foundations or tunnels. Traditional technology 3: using fiberglass anchors effectively solves the problems of subsequent construction and environmental pollution, but their shear, torsion, and bending strength is relatively low, they are prone to brittle fracture, and their anchoring ability in soft soil strata is poor. Therefore, in order to solve the problem of traditional steel anchors causing underground construction obstacles and hindering the construction of subsequent nearby projects, it is urgent to develop a new type of anchor that has both high strength and high anchoring force, and can be recycled to avoid forming underground construction obstacles. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the above-mentioned technical problem, this utility model provides an anchor structure and an anchoring structure for the sidewall of the foundation pit.

[0005] The technical solution adopted in this utility model is: an anchor bolt structure, having: A fiberglass rod sleeve, with a first internal thread provided on the inner wall of the fiberglass rod sleeve; The metal rod core can be inserted into the fiberglass rod sleeve, and the end of the metal rod core can extend out of the fiberglass rod sleeve. The outer wall of the metal rod core is provided with a first external thread that mates with the first internal thread. Anchors can be fitted onto the inner core of a metal pole that extends out of the fiberglass pole sleeve, with the anchors abutting against the end of the fiberglass pole sleeve.

[0006] A sleeve is provided between the inner core of the metal rod and the anchor. The inner wall of the sleeve is provided with a second internal thread. The outer wall of the inner core of the metal rod extending out of the fiberglass rod sleeve is provided with a second external thread that mates with the second internal thread. The outer wall of the sleeve is provided with a third external thread. The inner wall of the anchor is provided with a third internal thread that mates with the third external thread. The diameter of the end face of the sleeve near the fiberglass rod sleeve is larger than the diameter of the end face of the sleeve away from the fiberglass rod sleeve.

[0007] A pad is fitted onto the inner core of the metal rod that extends out of the fiberglass rod sleeve. The pad is positioned between the end of the fiberglass rod sleeve and the anchor.

[0008] An anchoring structure for the sidewall of a foundation pit, using an anchor bolt structure according to the above-mentioned claim, has the following characteristics: Pile walls are laid on the side walls of the foundation pit; Jet grouting piles are arranged on the side wall of the foundation pit. Anchor structures are arranged inside the jet grouting pile along the axis of the jet grouting pile. The ends of the anchor structures pass through the pile wall and extend out of the pile wall. Anchor heads are located at the ends of anchor structures that extend beyond the pile wall.

[0009] Its characteristic is that the anchor head is a concrete structure.

[0010] The jet grouting piles are at a certain angle to the horizontal plane.

[0011] The beneficial effects of this utility model are as follows: This utility model installs a metal rod inner core inside the fiberglass rod sleeve through a threaded fit, and installs anchors on the metal rod inner core extending outside the fiberglass rod sleeve. This facilitates the installation of the metal rod inner core inside the fiberglass rod sleeve and the installation of anchors on the metal rod inner core. Under the action of the threaded fit between the fiberglass rod sleeve and the metal rod inner core, the fit between the metal rod inner core and the anchors, and the abutting fit between the anchors and the metal tube inner core, the fiberglass rod sleeve and the metal rod inner core form a whole. The combination of the metal rod inner core and the fiberglass rod sleeve improves the material properties such as shear resistance, torsion resistance, and bending resistance, and solves the problems of fiberglass anchor rods being brittle and having insufficient anchoring force in soft soil foundations. After the jet grouting pile construction is completed, the anchor rod is directly inserted into the center of the jet grouting pile, eliminating the need for traditional anchor drilling and grouting, which can significantly reduce construction time and save project costs; After the anchor structure consisting of a fiberglass rod sleeve and a metal rod core is anchored to the side wall of the foundation pit, the metal rod core is protected by the fiberglass rod sleeve, so there is no need for anti-corrosion treatment, saving anti-corrosion treatment costs. By removing the anchors from the metal rod core, the metal rod core can be removed from the fiberglass rod sleeve; the removed metal rod core can be reused, reducing material waste and saving construction costs. The fiberglass rod sleeve is left in the foundation. It can be easily broken during the construction of nearby buildings, which solves the problems of traditional steel anchor rods being difficult to recycle, hindering nearby construction and damaging the environment. Attached Figure Description

[0012] Figure 1 : A schematic diagram of an anchor bolt structure in this utility model.

[0013] Figure 2 : Figure 1 Schematic diagram at point A in the middle.

[0014] Figure 3 : A cross-sectional view of the fiberglass rod sleeve in this utility model.

[0015] Figure 4 : A schematic diagram of the structure of the inner core of the metal rod in this utility model.

[0016] Figure 5 : A schematic diagram of an anchoring structure for the sidewall of a foundation pit in this utility model.

[0017] Figure 6 : A schematic diagram of the structure of the anchor in this utility model.

[0018] Figure 7 : A schematic diagram of the sleeve structure in this utility model.

[0019] In the diagram: 1. Metal rod inner core; 101. First external thread; 102. Inner end of metal rod; 103. Second external thread; 104. Outer end of metal rod; 2. Fiberglass rod sleeve; 201. First internal thread; 202. Fiberglass bundle; 3. Pad; 4. Sleeve; 5. Anchor; 6. Jet grouting pile; 7. Pile wall; 8. Anchor head. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0021] Example 1 is an anchor bolt structure, which has the following features: Fiberglass rod sleeve 2, with a first internal thread 201 provided on the inner wall of fiberglass rod sleeve 2; The metal rod core 1 can be inserted into the fiberglass rod sleeve 2. The end of the metal rod core 1 can extend out of the fiberglass rod sleeve 2. The outer wall of the metal rod core 1 is provided with a first external thread 101 that mates with the first internal thread 201. The first external thread 101 is made at the inner end 102 of the metal rod of the metal rod core 1. Anchor 5 can be fitted onto the metal rod inner core 1 extending outside the fiberglass rod sleeve 2, with the anchor 5 abutting against the end of the fiberglass rod sleeve 2. Thus, after the metal rod inner core 1 is installed inside the fiberglass rod sleeve 2 via a threaded connection, the anchor 5, which abuts against the end of the fiberglass rod sleeve 2, is installed on the metal rod inner core 1 extending outside the fiberglass rod sleeve 2, making the fiberglass rod sleeve 2, the metal rod inner core 1, and the anchor 5 form a unified whole, thus enhancing the connection strength between the fiberglass rod sleeve 2 and the metal rod inner core 1.

[0022] In this embodiment, a sleeve 4 is provided between the metal rod inner core 1 and the anchor 5. The inner wall of the sleeve 4 is provided with a second internal thread. The outer wall of the metal rod inner core 1 extending out of the fiberglass rod sleeve 2 is provided with a second external thread 103 that mates with the second internal thread. The second external thread 103 is located at the outer end 104 of the metal rod of the metal rod inner core 1. The outer wall of the sleeve 4 is provided with a third external thread. The inner wall of the anchor 5 is provided with a third internal thread that mates with the third external thread. The diameter of the end face of the sleeve 4 near the fiberglass rod sleeve 2 is larger than the diameter of the end face of the sleeve 4 away from the fiberglass rod sleeve 2. Thus, after the metal rod inner core 1 is installed inside the fiberglass rod sleeve 2, the sleeve 4 is fitted onto the metal rod inner core 1 through the engagement of the second internal thread and the second external thread 103, and the anchor 5 is fitted onto the sleeve 4 through the engagement of the third internal thread and the third external thread. Under the action of the sleeve 4 with different end face diameters at both ends, the anchor 5 will apply pressure to the sleeve 4 in the radial direction during the fitting process, which can enhance the connection strength between the anchor 5 and the metal rod inner core 1.

[0023] In this embodiment, a pad is fitted on the metal rod core 1 that extends out of the fiberglass rod sleeve 2, and the pad 3 is arranged between the end of the fiberglass rod sleeve 2 and the anchor 5.

[0024] In this embodiment, a fiberglass bundle 202 is wound around the outside of the fiberglass rod sleeve 2. The diameter of the fiberglass rod sleeve 2 is 20-50mm, the wall thickness is about 1 / 8-1 / 6 of the diameter, and its fiberglass content is ≥80%.

[0025] Example 2 is an anchoring structure for the sidewall of a foundation pit. Based on Example 1, this example has the following features: Pile wall 7 is laid on the side wall of the foundation pit; Jet grouting pile 6 is arranged on the side wall of the foundation pit. An anchor structure is arranged inside the jet grouting pile 6 along the axis of the jet grouting pile 6. The end of the anchor structure passes through the pile wall 7 and extends out of the pile wall 7. Anchor head 8 is located at the end of the anchor structure extending beyond the pile wall 7. This allows the anchor structure, consisting of fiberglass sleeve 2 and metal core 1, to be anchored to the sidewall of the foundation pit, achieving a high level of support.

[0026] In this embodiment, the anchor head 8 is a concrete structure.

[0027] In this embodiment, the jet grouting pile 6 forms a certain angle with the horizontal plane. Thus, the inclined anchor structure has better resistance to horizontal loads and is less likely to detach from the jet grouting pile 6.

[0028] The construction method in this embodiment is as follows: The metal rod inner core 1 is installed inside the fiberglass rod sleeve 2 through the engagement of the first internal thread 201 and the first external thread 101; After the inclined jet grouting pile 6 is constructed, before the cement soil hardens, the assembled fiberglass anchor device is inserted along the center of the inclined jet grouting pile 6 using a combination of manual and mechanical insertion. After the inclined jet grouting pile 6 reaches its design strength, it is tensioned and anchored. The number of tensile performance tests is 2% of the total number of piles, but not less than 2. Before tensioning, a first-level load of 1 / 10 of the anchor tension is applied to ensure that all parts are tightened and the rod is straight. After tensioning is completed, a pad 3 is installed on the inner core 1 of the metal rod. The sleeve 4 is installed on the inner core 1 of the metal rod by the cooperation of the second internal thread and the second external thread 103. The fastener is installed on the sleeve 4 by the cooperation of the third internal thread and the third external thread to lock the inner core 1 of the metal rod and the fiberglass sleeve 2. If the prestress loss is significant after locking, tensioning compensation is required. The anchor head 8 is sealed with cement grout for corrosion protection.

[0029] The method for removing the anchor bolt structure in this embodiment is as follows: Remove the cement mortar sealing layer at anchor head 8, then remove the anchor 5 and sleeve 4 fitted on the metal rod inner core 1 in sequence, then rotate the metal rod inner core 1, and use the internal and external threads to make the metal anchor rod inner core separate from the fiberglass rod sleeve 2 embedded in the soil. Finally, clean the corresponding surface of the metal anchor rod inner core and store it properly.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An anchor bolt structure, characterized in that: have: Fiberglass rod sleeve (2), the inner wall of the fiberglass rod sleeve (2) is provided with a first internal thread (201); The metal rod core (1) can be inserted into the fiberglass rod sleeve (2), and the end of the metal rod core (1) can extend out of the fiberglass rod sleeve (2). The outer wall of the metal rod core (1) is provided with a first external thread (101) that mates with the first internal thread (201). Anchor (5) can be fitted onto the metal rod core (1) that extends out of the fiberglass rod sleeve (2), and the anchor (5) abuts against the end of the fiberglass rod sleeve (2).

2. The anchor bolt structure according to claim 1, characterized in that: A sleeve (4) is provided between the metal rod inner core (1) and the anchor (5). The inner wall of the sleeve (4) is provided with a second internal thread. The outer wall of the metal rod inner core (1) extending out of the fiberglass rod sleeve (2) is provided with a second external thread (103) that mates with the second internal thread. The outer wall of the sleeve (4) is provided with a third external thread. The inner wall of the anchor (5) is provided with a third internal thread that mates with the third external thread. The diameter of the end face of the sleeve (4) near the fiberglass rod sleeve (2) is larger than the diameter of the end face of the sleeve (4) away from the fiberglass rod sleeve (2).

3. The anchor bolt structure according to claim 1, characterized in that: A pad (3) is fitted on the metal rod core (1) extending out of the fiberglass rod sleeve (2). The pad (3) is positioned between the end of the fiberglass rod sleeve (2) and the anchor (5).

4. An anchoring structure for the sidewall of a foundation pit, using an anchor bolt structure as described in any one of claims 1 to 3, characterized in that: have: Pile wall (7) is laid on the side wall of the foundation pit; Jet grouting piles (6) are arranged on the side wall of the foundation pit. An anchor structure is arranged inside the jet grouting piles (6) along the axis of the jet grouting piles (6). The ends of the anchor structures pass through the pile wall (7) and extend out of the pile wall (7). Anchor head (8) is located at the end of the anchor structure extending out of the pile wall (7).

5. The anchoring structure for the sidewall of a foundation pit according to claim 4, characterized in that: The anchor head (8) is a concrete structure.

6. The anchoring structure for the sidewall of a foundation pit according to claim 4, characterized in that: The jet grouting pile (6) forms a certain angle with the horizontal plane.

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