Secant pile reinforcement cage, secant pile structure and enclosure structure

Abstract

The utility model provides a secant pile reinforcement cage, a secant pile structure and a building envelope, the secant pile reinforcement cage comprises a positioning ring and a connecting steel bar, the positioning ring is transversely arranged along the secant pile structure, the connecting steel bar is longitudinally arranged along the secant pile structure, and the connecting steel bar is connected with the positioning ring; the positioning ring comprises two arc segments, two linear segments and connecting segments, the arc segments are symmetrically arranged, the two linear segments are arranged and located between the two arc segments, the chord length corresponding to the arc segments is larger than the maximum distance between the two linear segments, and the two connecting segments correspond to the two arc segments and are correspondingly connected with the two ends of the single arc segment respectively. According to the secant pile reinforcement cage, reinforcing bars can be additionally arranged in the weak area of the secant pile structure and the connecting wall structure, so that the structural strength and the shear resistance of the weak area are enhanced, the connecting stability of the joint of the secant pile structure and the connecting wall structure is improved, effective connection between the secant pile structure and the connecting wall structure is ensured, and the service life of the secant pile structure is prolonged. And the effects of resisting outside soil pressure and blocking water are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of pile foundation construction, and more specifically, to an interlocking pile reinforcement cage, an interlocking pile structure and a retaining structure. Background Art

[0002] The pile-sheet interlocking underground continuous wall is a retaining structure used for underground deep foundation excavation and structural construction. Its structural feature is that the inter-pile structural plate constructed later is interlocked into the pile body of the large-diameter pile constructed earlier, so that the large-diameter pile and the inter-pile structural plate form an effective connection, achieving the effect of resisting external soil pressure and blocking water.

[0003] Since the inter-pile structural plate needs to be engaged with the large-diameter pile body, during construction, the large-diameter pile is first cast into a circular pile, and then the pile body at the engaging portion between the large-diameter pile and the inter-pile structural plate is milled to form a notch for the pile-plate engagement, and the soil at the inter-pile structural plate is milled at the same time to complete the hole forming of the inter-pile structural plate with a rectangular cross-section, and the inter-pile structural plate concrete is cast to complete the construction of the pile-plate engagement structure. For the above-mentioned pile-plate engagement structure, in order to ensure that the notch at the engaging portion between the large-diameter pile and the inter-pile structural plate can be milled after the large-diameter pile is formed, the steel cage of the large-diameter pile is often designed as a special-shaped steel cage with a round-end structure in cross-section, and all other steel cages except the round-end steel cage are plain concrete structures. After the pile-sheet interlocking structure is constructed, the foundation pit is excavated. As the excavation depth of the foundation pit gradually increases, the soil pressure on the pile-sheet interlocking underground continuous wall also gradually increases. Under the action of the external soil pressure, a weak area appears in the plain concrete part of the connection between the large-diameter pile and the pile-interlocking structural plate. The bearing capacity of this weak area is much smaller than that of the large-diameter pile and the pile-interlocking structural plate. Therefore, the plain concrete weak area becomes the key control point for the overall structure of the pile-sheet interlocking underground continuous wall to withstand soil pressure. Under the shearing action of the external soil pressure, the plain concrete in the weak area is prone to cracking or even damage, and loses its shear resistance. Utility Model Content

[0004] In view of the shortcomings of the existing methods, the present application proposes an interlocking pile steel cage, an interlocking pile structure and a retaining structure, which adopts a steel cage structure with a dumbbell-shaped cross-section to increase the reinforcement of the weak area between the large-diameter interlocking pile structure and the connecting wall structure, so as to enhance the structural strength and shear resistance of the weak area, and then improve the connection stability between the interlocking pile structure and the sheet pile structure of the present application.

[0005] As a first aspect, the present application relates to a snap pile reinforcement cage, which comprises a positioning ring and a connecting reinforcement, wherein the positioning ring is arranged transversely along the snap pile structure, the connecting reinforcement is arranged longitudinally along the snap pile structure, and the connecting reinforcement is connected to the positioning ring;

[0006] The positioning ring includes arc segments, straight line segments and connecting segments. The arc segments are symmetrically arranged in two groups, the straight line segments are arranged in two groups and are located between the two groups of arc segments, the chord length corresponding to the arc segments is greater than the maximum spacing between the two groups of straight line segments, and the connecting segments are arranged in two groups corresponding to the two groups of arc segments and respectively connect the two ends of a single group of arc segments.

[0007] It is further configured that: the positioning ring is configured in a dumbbell shape, the two groups of straight line segments are parallel to each other, and the connecting segment is configured as a straight line and is perpendicular to the straight line segments.

[0008] It is further provided that: the end of the straight line segment extends to the arc segment and is connected to the arc segment.

[0009] It is further configured that: a plurality of connecting steel bars are provided and are distributed at intervals along the outer contour of the positioning ring.

[0010] It is further arranged that: a plurality of groups of the positioning rings are arranged along the longitudinal direction of the bite pile structure, and the connecting steel bars are connected to the plurality of groups of the positioning rings.

[0011] Further configuration: also includes an acoustic detection tube, the acoustic detection tube extends along the length direction of the connecting steel bar and is connected to the positioning ring.

[0012] As a second aspect, the present application relates to an interlocking pile structure, which includes the interlocking pile steel cage as described above, wherein both sides of the interlocking pile structure are formed with connecting interlocking grooves with a connecting wall structure forming an underground continuous wall, and both sides of the interlocking pile steel cage are formed with avoidance positions for avoiding the connecting interlocking grooves.

[0013] As a third aspect, the present application relates to a retaining structure, which includes an interlocking pile structure and a connecting wall structure that are connected in annular shapes at intervals, wherein the interlocking pile structure is the interlocking pile structure mentioned above, and the connecting wall structure is inserted into a connecting interlocking groove of the interlocking pile structure.

[0014] It is further configured that: the connecting wall structure is provided with a rectangular frame steel cage.

[0015] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include:

[0016] 1. In the interlocking pile reinforcement of the present application, the reinforcement cage structure formed by connecting the positioning ring and the connecting reinforcement, the connecting end of the connecting segment and the arc segment protruding relative to the straight segment can be used as reinforcement for the weak area at the connection between the interlocking pile structure and the connecting wall structure, so as to enhance the structural strength and shear resistance of the weak area, thereby improving the connection stability between the interlocking pile structure and the connecting wall structure, optimizing the force at the connection between the two, ensuring the effective connection between the interlocking pile structure and the connecting wall structure, and achieving the effect of resisting external soil pressure and blocking water.

[0017] 2. In the interlocking pile structure of the present application, on the premise of ensuring the interlocking size of the interlocking groove and the construction working space, the interlocking pile steel cage inside can increase the reinforcement area of ​​the plain concrete in the weak area existing at the connection between the interlocking pile structure and the connecting wall structure, so that the shear resistance of the weak area can be enhanced, and the force between the interlocking pile structure and the connecting wall structure is more coordinated and reasonable, which can be suitable for underground projects with larger structural sizes and deeper excavation depths.

[0018] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A schematic diagram of the structure of the occlusal pile structure provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of the enclosure provided in an embodiment of the present application.

[0022] In the figure, 1, interlocking pile reinforcement cage; 11, positioning ring; 111, arc segment; 112, straight line segment; 113, connecting segment; 12, connecting reinforcement; 2, rectangular frame reinforcement cage; 1000, interlocking pile structure; 1001, connecting interlocking notch; 2000, connecting wall structure. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0024] Those skilled in the art will appreciate that, unless specifically stated, the "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of the present application refers to the presence of the features, integers, elements and / or components, but does not exclude the implementation of other features, elements, components and / or their combinations supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0026] Regarding the problem of poor shear resistance in the weak area of ​​large diameter piles in pile-sheet interlocking ground-connected walls, please refer to Figure 1 The present application provides an interlocking pile reinforcement cage 1, which can form a large-diameter interlocking pile structure 1000 with a connecting interlocking notch 1001, and add reinforcement to the weak area between the large-diameter interlocking pile structure 1000 and the connecting wall structure 2000, thereby enhancing the shear resistance of the weak area, making the force between the large-diameter interlocking pile structure 1000 and the connecting wall structure 2000 more reasonable, so as to facilitate underground projects with larger structural sizes and deeper excavation depths.

[0027] The interlocking pile reinforcement cage 1 includes a positioning ring 11 and a connecting reinforcement 12, wherein the positioning ring 11 is arranged along the transverse direction of the interlocking pile, the connecting reinforcement 12 is arranged along the longitudinal direction of the interlocking pile, and the connecting reinforcement 12 is vertically connected to the positioning ring 11. Specifically, the positioning ring 11 includes an arc segment 111, a straight segment 112 and a connecting segment 113, the arc segment 111 is arranged in two groups symmetrically with respect to the center of the interlocking pile, the straight segment 112 is arranged in two groups and is located between the two groups of arc segments 111, and the chord length corresponding to the arc segment 111 is greater than the maximum distance between the two groups of straight segments 112, the connecting segment 113 is arranged in two groups corresponding to the two groups of arc segments 111 and respectively connects the two ends of a single group of arc segments 111, and the straight segment 112 and the connecting segment 113 are arranged crosswise.

[0028] The outer contour of the positioning ring 11 in this embodiment is set in a dumbbell shape, two groups of straight segments 112 are set in parallel, and the ends of the straight segments 112 extend to the arc segment 111 and are connected to the arc segment 111, and the connecting segment 113 is set as a straight line and is located on the chord side corresponding to the arc segment 111, and the connecting segment 113 is vertically cross-connected with the straight segment 112, so that the two sides of the positioning ring 11 form a rectangular groove structure to avoid air gaps, which is convenient for the subsequent casting of the bite pile structure 1000. The bite grooves 1001 for connecting with the connecting wall structure 2000 can be formed on both sides thereof to meet the construction requirements of the enclosure structure, and the connecting end of the arc segment 111 and the connecting segment 113 are used as reinforcement added to the weak area at the connection between the bite pile structure 1000 and the connecting wall structure 2000, which enhances the structural strength and shear resistance of the weak area, so that the force between the bite pile structure 1000 and the connecting wall structure 2000 is more coordinated and reasonable.

[0029] Furthermore, multiple connecting steel bars 12 are arranged along the outer contour of the positioning ring 11 and are distributed at intervals, multiple groups of positioning rings 11 are arranged along the longitudinal direction of the interlocking pile structure 1000, and the connecting steel bars 12 connect multiple groups of positioning rings 11 along the longitudinal direction of the interlocking pile structure 1000, thereby forming a complete steel cage structure, effectively enhancing the bearing capacity of the interlocking pile structure 1000, improving the compressive performance of the pile, and ensuring the safety and stability of the project.

[0030] In one embodiment, the whole steel cage can be divided into multiple sections of sub-steel cages connected end to end, each sub-steel cage includes at least one positioning ring 11 and multiple connecting steel bars 12 arranged along the outer contour of the positioning ring 11, and two adjacent sub-steel cages can be connected through the connecting steel bars 12. Since the complete steel cage is divided into multiple sections of sub-steel cages for splicing, the length of the connecting steel bars 12 of each section of the sub-steel cage is shortened, so that it can be convenient for transportation and processing. In addition, a threaded section is provided on the end of the connecting steel bar 12, and the connecting steel bars 12 of two adjacent sub-steel cages can be connected through a threaded sleeve, which is convenient for connection. A self-locking structure can be formed between the connecting steel bar 12 and the threaded sleeve to ensure the structural stability of the complete steel cage formed by connecting the sub-steel cages.

[0031] The interlocking pile reinforcement cage 1 of the present application further comprises an acoustic detection tube (not shown in the figure), which extends along the longitudinal direction of the connecting reinforcement 12 and is connected to the positioning ring 11. The acoustic detection tube can be used as a concrete pouring conduit for pile foundation grouting.

[0032] In summary, the interlocking pile steel bars of the present application are connected by a positioning ring 11 and a connecting steel bar 12 to form a steel cage structure with a dumbbell-shaped cross-section. The connecting segment 113 and the connecting end of the arc segment protruding relative to the straight segment 112 can be used as reinforcement for the weak area at the connection between the interlocking pile structure 1000 and the connecting wall structure 2000, so as to enhance the structural strength and shear resistance of the weak area, thereby improving the connection stability of the connection between the interlocking pile structure 1000 and the connecting wall structure 2000, optimizing the force at the connection between the two, ensuring the effective connection between the interlocking pile structure 1000 and the connecting wall structure 2000, and achieving the effect of resisting external soil pressure and blocking water.

[0033] The present application also relates to a snap-in pile structure 1000, see Figure 1 and Figure 2 It includes the interlocking pile steel cage 1 as described above. Since the interlocking pile steel cage 1 has a dumbbell-shaped cross-section, connecting interlocking grooves 1001 connected to the connecting wall structure 2000 forming an underground continuous wall can be provided on both sides of the interlocking pile structure 1000, and the straight line segment 112 of the cross-section of the interlocking pile steel cage 1 is connected to the bottom surface of the interlocking groove 1001 and is parallel.

[0034] The interlocking pile structure 1000 of the present application can, under the premise of ensuring the interlocking size of its connecting interlocking groove 1001 and the construction working space, increase the reinforcement area of ​​the plain concrete in the weak area existing at the connection between the interlocking pile structure 1000 and the connecting wall structure 2000 through the interlocking pile steel cage 1 inside it, so that the shear resistance of the weak area can be enhanced, and the force between the interlocking pile structure 1000 and the connecting wall structure 2000 is more coordinated and reasonable, and it can be applied to underground projects with larger structural sizes and deeper excavation depths.

[0035] This application also relates to a enclosure structure, see Figure 2 It includes the interlocking pile structure 1000 and the connecting wall structure 2000 as described above. Connecting interlocking grooves 1001 are formed on the opposite sides of the interlocking pile structure 1000. The connecting wall structure 2000 is inserted into the connecting interlocking grooves 1001 to be connected with the interlocking pile structure 1000 at intervals to form an annular pile-plate interlocking underground continuous wall, which can be used for underground deep foundation excavation and structural construction.

[0036] The connecting wall structure 2000 is built with a rectangular frame steel cage 2, and the interlocking pile structure 1000 is built with an interlocking pile steel cage 1 with a dumbbell-shaped cross section. The interlocking pile steel cage 1 can add reinforcement to the connection between the interlocking pile structure 1000 and the connecting wall structure 2000. During construction, the interlocking pile structure 1000 with the connecting interlocking notch 1001 is cast by cooperating with the interlocking pile steel cage 1 and the limiting steel box, and at the same time, the soil at the connecting wall structure 2000 is milled to complete the hole of the connecting wall structure 2000 with a rectangular cross section, and the rectangular frame steel cage 2 is lowered, and the inter-pile structural slab concrete is cast to complete the construction of the pile-slab interlocking structure, so as to achieve the effect of resisting the external soil pressure and blocking water of the enclosure structure.

[0037] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, 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 this application can be understood according to specific circumstances.

[0040] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0041] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A snap pile reinforcement cage, characterized in that: It comprises a positioning ring and a connecting steel bar, wherein the positioning ring is arranged transversely along the bite pile structure, the connecting steel bar is arranged longitudinally along the bite pile structure, and the connecting steel bar is connected to the positioning ring; The positioning ring includes arc segments, straight line segments and connecting segments. The arc segments are symmetrically arranged in two groups, the straight line segments are arranged in two groups and are located between the two groups of arc segments, the chord length corresponding to the arc segments is greater than the maximum spacing between the two groups of straight line segments, and the connecting segments are arranged in two groups corresponding to the two groups of arc segments and respectively connect the two ends of a single group of arc segments.

2. The interlocking pile reinforcement cage according to claim 1 is characterized in that: The positioning ring is arranged in a dumbbell shape, the two groups of straight line segments are parallel to each other, and the connecting segment is arranged as a straight line and is perpendicular to the straight line segments.

3. The interlocking pile reinforcement cage according to claim 2 is characterized in that: The end of the straight line segment extends to the arc segment and is connected to the arc segment.

4. The interlocking pile reinforcement cage according to claim 1, characterized in that: The connecting steel bars are provided in plurality and are distributed at intervals along the outer contour of the positioning ring.

5. The interlocking pile reinforcement cage according to claim 4 is characterized in that: The positioning rings are arranged in a plurality of groups along the longitudinal direction of the bite pile structure, and the connecting steel bars are connected to the plurality of groups of positioning rings.

6. The interlocking pile reinforcement cage according to claim 1, characterized in that: It also includes an acoustic detection tube, which extends along the length direction of the connecting steel bar and is connected to the positioning ring.

7. An interlocking pile structure, characterized in that: It comprises the interlocking pile steel cage as described in any one of claims 1 to 5, wherein both sides of the interlocking pile structure are formed with connecting interlocking grooves with the connecting wall structure forming the underground continuous wall, and both sides of the interlocking pile steel cage are formed with avoidance positions for avoiding the connecting interlocking grooves.

8. A protective structure, characterized in that: It comprises an intermittently connected annular bite pile structure and a connecting wall structure, wherein the bite pile structure is the bite pile structure according to claim 7, and the connecting wall structure is inserted into the connecting bite notch of the bite pile structure.

9. The enclosure structure according to claim 8, characterized in that: The connecting wall structure is internally provided with a rectangular frame steel reinforcement cage.

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