An enlarged head anchor rod
By combining the hinged limiting unit and the hinged tensioning unit with the design of the pusher and the reinforcing head, the problems of inaccurate steel cage unfolding and insufficient structural stability were solved, and the high-quality forming of the enlarged head and the improvement of anchoring performance were achieved.
Patent Information
- Application Number
- CN202511293195.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2045-09-11
AI Technical Summary
In existing technologies, the inaccurate unfolding of the reinforcing cage and insufficient structural stability lead to a decline in the quality of the enlarged head and anchoring performance.
By employing articulated limiting units and articulated tensioning units in conjunction with pushers and reinforcing heads, the steel cage is automatically deployed by releasing the constraints of the constraint structure, ensuring that it is accurately deployed to the preset state. Rigid connection is achieved through the connecting head, thereby improving the structural strength and anti-interference ability.
Ensure that the reinforcing cage is fully and accurately deployed, improve the structural strength and anchoring performance of the enlarged head, simplify the construction process, and enhance construction stability and convenience.
Smart Images
Figure CN120776696B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of anchor rod, in particular to an expanded head anchor rod. BACKGROUND
[0002] The expanded head anchor rod is an important supporting component widely used in the fields of rock-soil reinforcement, slope support and foundation pit water stop, etc., and its core is to form an expanded head region in the anchoring section through grouting, thereby improving the anchoring force. In order to realize the effective forming of the expanded head and the anchoring strength, the prior art will put a steel reinforcement cage structure into the expanded head region. In the process of putting, the steel reinforcement cage structure is first sent to the expanded head region at the target depth in a gathered state, then unfolded, and finally grouted to form an expanded head.
[0003] At present, the unfolding of the steel reinforcement cage after being put into the expanded head region mainly adopts an elastic stretching structure. However, this unfolding method has significant defects in actual application. First, the accuracy of the unfolded steel reinforcement cage cannot be guaranteed. Due to the influence of elastic element rebound, the steel reinforcement cage may not be fully unfolded, and in the process of unfolding, it may not be accurately unfolded due to uneven stress, thereby causing uneven gaps between the steel reinforcement cage and the hole wall, reducing the quality of the expanded head, and accordingly weakening the anchoring performance. Second, the structural stability of the unfolded steel reinforcement cage is insufficient, and it is easy to deform, deviate, etc. due to stress in the subsequent pouring process, which also reduces the quality of the expanded head and weakens the anchoring performance. SUMMARY
[0004] The present application provides an expanded head anchor rod, which comprises a shaft rod and a constraint structure, a steel reinforcement cage is sleeved on the shaft rod, the constraint structure is used to constrain the steel reinforcement cage to be in a reduced state, an unfolding structure is arranged between the steel reinforcement cage and the shaft rod, the unfolding structure unfolds the steel reinforcement cage to be in an expanded state after the constraint of the constraint structure is released, and the unfolding structure comprises: a hinged limiting unit and a plurality of hinged stretching units located below the hinged limiting unit, the plurality of hinged stretching units are sequentially distributed along the axial direction of the shaft rod; a pushing piece is provided with an elastic piece between the shaft rod, the elastic force of the elastic piece is released after the constraint of the constraint structure is released, the pushing piece moves upward, the pushing piece moves upward synchronously to push the hinged stretching units to move upward and unfold the steel reinforcement cage; a reinforcing head is slidably installed at the bottom of the shaft rod and abuts against the pushing piece; a first associated head is used to automatically connect the pushing piece and the reinforcing head together after the steel reinforcement cage is unfolded; and a second associated head is used to automatically connect the pushing piece and the reinforcing head together after the steel reinforcement cage is unfolded to a preset state.
[0005] In a possible implementation manner, the steel reinforcement cage comprises a hoop and a plurality of vertical bars, the plurality of vertical bars are uniformly distributed along the circumferential direction of the shaft rod, the hoop is arranged in a threaded manner and is provided with a plurality of connection points between the hoop and the vertical bars, the connection points are connected together based on the hoop and the vertical bars being unfolded to a preset state, so as to constrain the unfolding state of the steel reinforcement cage during the unfolding process.
[0006] In a possible implementation, the pushing-up member comprises a sleeve and a plurality of hinged supporting units, the hinged supporting units being hinged between the reinforcement cage and the corresponding hinged disc.
[0007] In a possible implementation, the first associated head comprises a limiting seat fixedly installed on the pushing-up member, a clamping member hingedly installed on the reinforcing head, and an initial constraint member installed on the shaft rod, used to limit the clamping member to a non-clamping position in an initial state; the initial constraint member automatically releases the constraint on the clamping member during the movement of the reinforcing head, so that the clamping member is automatically clamped with the limiting seat along with the movement of the reinforcing head.
[0008] In a possible implementation, the second associated head comprises a limiting groove and a limiting block, the limiting groove being fixedly arranged on the shaft rod, and the limiting block being radially and elastically slidably installed on the pushing-up member and automatically inserted into the limiting groove when the pushing-up member moves up to the position where the reinforcement cage is fully expanded to the preset position.
[0009] In a possible implementation, the reinforcing head is fixedly installed with a plug, used to be inserted into the soil layer at the bottom of the hole body to fix the reinforcement cage.
[0010] In a possible implementation, the hinged supporting unit and the hinged limiting unit each comprise a plurality of hinged rods uniformly distributed along the circumference of the shaft rod.
[0011] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects: according to the expanding head anchor rod provided by the embodiments of the present application, during the lowering process of the shaft rod, the constraint on the reinforcement cage is released after the reinforcement cage is fully inserted into the expanding hole section, and before the reinforcing head contacts the hole bottom, and the reinforcement cage is automatically expanded under the cooperation of the hinged supporting unit, the pushing-up member and the elastic member, then the lowering process continues, and after the reinforcing head is partially inserted into the hole bottom, the lowering process continues until the second associated head connects the pushing-up member and the shaft rod together, and the first associated head automatically connects the reinforcing head and the pushing-up member together, thereby effectively improving the overall structural strength and anti-interference ability, and ensuring that the reinforcement cage is fully and accurately expanded to the preset state, thereby effectively improving the structural strength and quality of the expanding head after pouring, and the pushing-up member expands the reinforcement cage by pushing up the hinged supporting unit, and then the reinforcing head is again abutted against the pushing-up member to accurately expand the reinforcement cage to the preset position, the whole process is smoothly and stably completed during the lowering process of the shaft rod, without the need for other complex operations, thereby effectively improving the convenience and stability of the construction process. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is a partial structure diagram of the expanding head anchor rod provided by the embodiments of the present application installed in the expanding area of the hole body.
[0013] Figure 2 is a schematic view of the state change of part of the structure in the expansion process of the reinforced cage of the expanded-head anchor rod provided by the embodiment of the present application.
[0014] Figure 3 is a structural schematic view of the limiting seat and the clamping piece of the expanded-head anchor rod provided by the embodiment of the present application.
[0015] Figure 4 is a schematic view of the state change of the limiting seat and the clamping piece in the expansion process of the reinforced cage of the expanded-head anchor rod provided by the embodiment of the present application.
[0016] Figure 5 is a structural schematic view of the hinged bracing unit from the top view in the expansion state of the reinforced cage of the expanded-head anchor rod provided by the embodiment of the present application.
[0017] Figure 6 is a structural schematic view of the hinged bracing unit from the top view in the contraction state of the reinforced cage of the expanded-head anchor rod provided by the embodiment of the present application.
[0018] In the figure: 1, shaft rod; 2, base sleeve; 3, reinforced cage; 31, stirrup; 32, vertical reinforcement; 4, expansion structure; 41, hinged limiting unit; 42, hinged bracing unit; 43, pushing piece; 431, sleeve; 432, hinged disc; 44, reinforcing head; 45, associated head one; 451, limiting seat; 452, clamping piece; 453, initial constraint piece; 46, associated head two; 461, limiting groove; 462, limiting block; 47, elastic piece; 48, plug; 5, connecting disc. DETAILED DESCRIPTION
[0019] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0020] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The utility model provides an enlarged head anchor rod, including shaft 1, restraint structure and base sleeve 2, wherein, shaft 1 and restraint structure (not shown in drawing) are all prior art, shaft 1 is provided with reinforcement cage 3, restraint structure is used to constrain reinforcement cage 3 and make its diameter be in reduced state, and expansion structure 4 is arranged between reinforcement cage 3 and shaft 1, to avoid the installation connection of expansion structure 4 from destroying the integrity of shaft 1 and affecting its structural strength, base sleeve 2 is fixedly installed in the lower area of shaft 1, expansion structure 4 is installed between reinforcement cage 3 and base sleeve 2, and expansion structure 4 expands reinforcement cage 3 and makes its diameter be in enlarged state after the restraint of restraint structure is released, as shown in Figure 2 Expansion structure 4 includes a hinged limiting unit 41 and a plurality of hinged supporting units 42 below hinged limiting unit 41, the plurality of hinged supporting units 42 are sequentially distributed from top to bottom along the axial direction of shaft 1, base sleeve 2 is vertically slidably provided with a pushing piece 43 and a reinforcing head 44, an elastic member 47 is arranged between pushing piece 43 and base sleeve 2, reinforcing head 44 is located below pushing piece 43 and at the bottom of shaft 1 and abuts against pushing piece 43, an associated head one 45 is arranged between pushing piece 43 and reinforcing head 44, and an associated head two 46 is arranged between pushing piece 43 and base sleeve 2, during the placement of the anchor rod, when reinforcement cage 3 completely enters the hole body enlarged head area, the restraint of restraint structure is released, pushing piece 43 moves upward under the action of elastic member 47, and reinforcement cage 3 is automatically expanded through hinged supporting units 42, during the process, reinforcing head 44 does not contact the bottom of the hole body, pushing piece 43 can move to a preset position (associated head two 46 automatically limits and connects pushing piece 43 and base sleeve 2 together), or can approach the preset position, then, with the continuous downward movement of shaft 1, reinforcing head 44 is partially inserted into the bottom of the hole body, and abuts against pushing piece 43 during the continuous downward movement of shaft 1, to ensure that pushing piece 43 moves to the preset position and completes the limiting connection with base sleeve 2, so that reinforcement cage 3 changes from the original elastic expansion state to the rigid expansion state, not only makes reinforcement cage 3 fully expand and be in the rigid expansion state, but also limits and locks reinforcement cage 3 and base sleeve 2 together, to sufficiently improve the strength of the overall structure, at the same time, reinforcing head 44 is limited and connected with pushing piece 43 together under the action of associated head one 45, and is stably placed in the hole, to further improve the strength and anti-interference ability of the overall structure, and effectively ensure the quality of the enlarged head formed by subsequent grouting, and correspondingly improve the anchoring performance.
[0021] Referring to Figure 1 , Figure 2 , Figure 5 and Figure 6, the reinforcing cage 3 comprises a plurality of vertical bars 32 uniformly distributed along the circumference of the shaft 1 and a plurality of stirrups 31 arranged in a threaded manner, the hinged tensioning units 42 and the hinged limiting units 41 each comprise a plurality of hinged rods uniformly distributed along the circumference of the shaft 1, the pushing piece 43 comprises a sleeve 431 and a plurality of hinged discs 432 fixedly installed on the sleeve 431, the sleeve 431 is sleeved on the base sleeve 2 in a sliding manner, the hinged discs 432 are sequentially distributed along the axial direction and correspond to the hinged tensioning units 42 one by one, the top of the base sleeve 2 is fixedly provided with a connecting disc 5, the hinged rods in the hinged limiting units 41 correspond to the vertical bars 32 one by one, and one end of the hinged rods is hinged to the corresponding vertical bars 32 and the other end is hinged to the connecting disc 5, one end of the hinged rods in the hinged tensioning units 42 is hinged to the vertical bars 32 and the other end is hinged to the corresponding hinged discs 432, and the hinged discs 432 are moved upwards to make the vertical bars 32 unfold (as shown in Figure 2 ), in the process of unfolding the vertical bars 32, the stirrups 31 are unfolded and changed from a relaxed state to a tensioned state, thereby completing the unfolding of the reinforcing cage 3, wherein a plurality of connection points are arranged between the stirrups 31 and the vertical bars 32, the connection points connect the stirrups 31 and the vertical bars 32 together based on the reinforcing cage 3 being unfolded to a preset state, so as to constrain the unfolding state of the reinforcing cage 3 during the unfolding process, as shown in Figure 6 , taking one spiral turn of the stirrups 31 as an example, every other vertical bar 32 is bundled together with the corresponding stirrup 31 (steel wire, string or other materials can be used for bundling), when the reinforcing cage 3 is in a reduced state, the stirrups 31 are correspondingly gathered between adjacent two vertical bars 32 bundled with the stirrups 31, then in the process of unfolding the vertical bars 32, the stirrups 31 between the adjacent two vertical bars 32 bundled with the stirrups 31 are unfolded and tensioned in priority, thereby constraining the unfolding state of the vertical bars 32 to a certain extent and improving the stability and accuracy of the unfolding process.
[0022] Referring to Figure 1 , Figure 3 and Figure 4 , the associated head 45 comprises a limiting seat 451 fixedly installed at the bottom of the sleeve 431, a clamping piece 452 hingedly installed on the reinforcing head 44 and an initial constraint piece 453 fixedly installed on the base sleeve 2, in an initial state, the top of the reinforcing head 44 abuts against the bottom of the limiting seat 451, the clamping piece 452 is not clamped together with the limiting seat 451 under the constraint of the initial constraint piece 453 (as shown in the leftmost view of Figure 4 ), then as the pushing piece 43 moves upwards, the limiting seat 451 moves upwards and separates from the reinforcing head 44 (as shown in Figure 4After the upper end of the reinforcing head 44 is inserted into the hole body, the upper end of the reinforcing head 44 is located in the limiting position of the limiting seat 451 (as shown in the middle view), and then the reinforcing head 44 is not moved along with the shaft 1 under the limitation of the hole body bottom, and is again abutted against the bottom of the limiting seat 451 along with the downward movement of the shaft 1, in the process, the clamping piece 452 is automatically clamped with the limiting seat 451 after losing the constraint of the initial constraint piece 453, thereby enabling the reinforcing head 44 to be limitedly connected with the pushing piece 43, wherein, in order to ensure the stability of the clamping process of the clamping piece 452 and the limiting seat 451, a spring (not shown in the figure) can be connected between the clamping piece 452 and the reinforcing head 44 to constrain the state of the clamping piece 452, so that the clamping piece 452 is in a vertical state after losing the constraint, and then is automatically rotated and reset in the clamping process with the limiting seat 451, thereby being smoothly clamped with the limiting seat 451.
[0023] Referring to Figure 1 , Figure 3 and Figure 4 , the associated head two 46 comprises a limiting groove 461 and a limiting block 462, the limiting groove 461 is arranged on the base sleeve 2, and the limiting block 462 is radially and elastically slidably installed on the upper sleeve 431, when the pushing piece 43 is moved upward to the preset position, the limiting block 462 is aligned with the limiting groove 461 and is inserted into the limiting groove 461 under the action of the elastic force, thereby enabling the pushing piece 43 to be limitedly connected with the base sleeve 2.
[0024] Referring to Figure 1 , the lower end of the reinforcing head 44 is fixedly installed with a plug 48 for inserting into the soil layer at the bottom of the hole body to fix the steel reinforcement cage 3, thereby improving the firmness of the overall structure.
[0025] In the embodiments of the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature can be directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is lower than that of the second feature.
[0026] In the description of the present application, it should be further pointed out that, unless specifically defined and limited, the terms "arrangement", "connection", "installation", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, or sliding connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A bell head anchor rod comprising a shaft and a restraining structure, characterised in that: The shaft is sleeved with a reinforcing cage, and a constraint structure is used to constrain the reinforcing cage to be in a reduced diameter state; An unfolding structure is arranged between the reinforcing cage and the shaft, and the unfolding structure unfolds the reinforcing cage to be in an expanded diameter state after the constraint structure is released from the constraint state, and the unfolding structure comprises: A plurality of hinged supporting units are arranged below the hinged limiting unit and are sequentially distributed along the axial direction of the shaft; An axially slidable pushing piece is arranged between the shaft and the pushing piece, and an elastic member is arranged between the shaft and the pushing piece to release the elastic force and move the pushing piece upward after the constraint structure is released from the constraint state, and the pushing piece moves upward to synchronously push the hinged supporting units to move upward and unfold the reinforcing cage; A reinforcing head is slidably installed at the bottom of the shaft and abuts against the pushing piece; A first associated head is used to automatically connect the pushing piece and the reinforcing head together after the reinforcing cage is unfolded to a preset state; A second associated head is used to automatically connect the pushing piece and the shaft together after the reinforcing cage is unfolded; After the reinforcing cage is unfolded, the shaft continues to move downward, the reinforcing head contacts the bottom of the hole and abuts against the pushing piece again during the continuous downward movement of the shaft; The first associated head comprises: A limiting seat is fixedly installed on the pushing piece; A clamping piece is hingedly installed on the reinforcing head; An initial constraint piece is installed on the shaft and is used to limit the clamping piece to a non-clamping position in an initial state; The initial constraint piece automatically releases the constraint on the clamping piece during the upward movement of the reinforcing head, so that the clamping piece automatically clamps the limiting seat together with the reinforcing head.
2. An expanded-head anchor according to claim 1, wherein: The reinforcing cage comprises a stirrup and a plurality of vertical bars, the vertical bars are uniformly distributed along the circumferential direction of the shaft, the stirrup is arranged in a threaded manner and is connected to the vertical bars at a plurality of connection points, and the connection points are used to connect the stirrup and the vertical bars together based on the unfolding of the reinforcing cage to a preset state to constrain the unfolding state of the reinforcing cage.
3. An expanded-head anchor according to claim 1, wherein: The pushing piece comprises a sleeve and a plurality of hinged discs, the hinged discs correspond to the hinged supporting units one by one, and the hinged supporting units are hingedly connected between the reinforcing cage and the corresponding hinged discs.
4. An expanded-head anchor according to claim 1, wherein: The second associated head comprises a limiting groove and a limiting block, the limiting groove is fixedly arranged on the shaft, and the limiting block is radially and elastically slidably installed on the pushing piece and automatically inserted into the limiting groove when the pushing piece moves upward to unfold the reinforcing cage to a preset position.
5. An expanded-head anchor rod according to claim 1, characterized in that: A plug is fixedly installed on the reinforcing head and is used to be inserted into the soil layer at the bottom of the hole to fix the reinforcing cage.
6. An expanded-head anchor according to claim 1, wherein: The hinged supporting units and the hinged limiting unit each comprise a hinged rod which is uniformly distributed along the circumferential direction of the shaft.
Citation Information
Patent Citations
Weft disconnection type variable-diameter fiber cage and anchor rod thereof
CN114000504A