Hoop-shaped opposite-pulling self-locking structure for secant piles

Abstract

The utility model relates to the technical field of deep foundation pit ancient tree protection, and discloses an occlusive pile hoop-shaped opposite-pulling self-locking structure which comprises an ancient tree, a foundation pit is formed in the peripheral ground of the ancient tree, occlusive piles are arranged in the foundation pit, the same crown beam is poured on the tops of the occlusive piles, and two sets of self-locking anchoring combinations are distributed on the occlusive piles. Each self-locking anchoring combination comprises waist beams which are uniformly poured outside the secant piles, two large anchorage piers are arranged at openings of the waist beams, small anchorage piers are arranged among the waist beams far away from the large anchorage piers, and the small anchorage piers and the large anchorage piers are all poured on the secant piles; the ancient tree protection area is surrounded and fastened through triple support limiting measures of the secant piles, the crown beams and the self-locking anchoring combination, it is guaranteed that the ancient tree protection area is stably supported in the foundation pit excavation process, the influence of construction on ancient trees is reduced to the maximum extent, the ancient trees are effectively protected, and the reliable, economical, green and environment-friendly effects are achieved.

Description

Technical Field

[0001] This utility model patent relates to the technical field of ancient tree protection in deep foundation pits, and specifically, to an interlocking pile hoop-shaped tension self-locking structure. Background Art

[0002] As the pace of urban construction and urban village renovation continues to accelerate, it is becoming more and more common for construction sites to encroach on existing ancient tree areas. When excavating foundation pits, the area around the ancient trees within a range of approximately 290° faces deep foundation pit excavation. During the construction process, the impact of foundation pit excavation and support on the ancient trees needs to be considered.

[0003] In the existing design scheme for foundation pit support, the pile-anchor structure support requires the anchor cable to be tilted and embedded into the soil at a long depth. Construction in the ancient tree protection area is likely to cause direct damage to the ancient trees themselves and their foundations. The use of internal support forms such as steel support and concrete support has many restrictions on foundation pit and basement construction, and it is also difficult to provide effective limit protection for the ancient tree protection area. Utility Model Content

[0004] The utility model aims to provide a bracket hopper for self-unloading fillers, aiming to solve the problem in the prior art that it is difficult to effectively limit the protection of ancient tree protection areas.

[0005] The utility model is realized in this way: a self-locking structure of a snap pile hoop-shaped tensioning structure comprises an ancient tree, a foundation pit is opened on the outer ground of the ancient tree, snap piles are arranged in the foundation pit, the tops of a plurality of snap piles are cast with the same crown beam, two groups of self-locking anchoring assemblies are distributed on the plurality of snap piles, each self-locking anchoring assembly comprises waist beams uniformly cast outside the plurality of snap piles, two large anchor piers are arranged at the openings of the plurality of waist beams, small anchor piers are arranged between the plurality of waist beams away from the large anchor piers, and the small anchor piers and the large anchor piers are cast Built on the interlocking piles, first steel strands are arranged between two large anchor piers and adjacent small anchor piers, the two first steel strands respectively pass through the corresponding large anchor piers, waist beams and small anchor piers in sequence, one end of the two first steel strands close to the large anchor piers is locked and installed on the large anchor pier, and the other end thereof is slidably connected to the corresponding small anchor pier, every two adjacent small anchor piers and the waist beam between the two small anchor piers form a group, each group is provided with second steel strands, and the two ends of several second steel strands are respectively locked and installed and slidably installed on the corresponding small anchor piers.

[0006] Preferably, the interlocking piles are constructed in a staggered manner of reinforced concrete piles and concrete piles, with the ends of the concrete piles 5m into the pit bottom and the ends of the reinforced concrete piles 8m into the pit bottom.

[0007] Preferably, the interlocking piles are arranged 5 m horizontally outwardly from the projection of the crown of the ancient tree.

[0008] Preferably, the snap pile is an "Ω"-shaped retaining wall.

[0009] Preferably, a plurality of tension beams are connected to the crown beam, and both ends of the plurality of tension beams are connected to the crown beam.

[0010] Preferably, the size of the cap beam is 1.4m×0.8m, and the size of the tension beam is 1.4m×0.4m.

[0011] Preferably, a PVC pipe hole with a diameter of 60 mm is reserved on each of the two large anchor piers.

[0012] Preferably, two PVC pipe holes with a diameter of 60 mm are reserved on each of the small anchor piers.

[0013] Preferably, PVC pipes are installed in a plurality of the pipe holes, and the PVC pipes are compatible with the first steel strand and the second steel strand.

[0014] Preferably, the interlocking piles are tied with the corresponding steel bars inside the crown beam, the pile head steel bars of the reinforced concrete pile extend into the crown beam, and the steel bars at both ends of the tension beam are connected to the pile head steel bars of the reinforced concrete pile and the steel bars of the crown beam.

[0015] Compared with the prior art, the support hopper of the self-unloading filler provided by the utility model, after the concrete strength of the large anchor pier, the small anchor pier and the waist beam reaches 100%, the first steel strand and the other end of the second steel strand are stretched. During the stretching, the end of the first steel strand or the second steel strand to be stretched is passed through the jack, and the jack tension is set to 300KN. The first steel strand or the second steel strand is stretched to a certain stroke. When the tension value is stably maintained for 3min, the tensioning is stopped, the jack is retracted, and the first tensioning is completed. After that, the jack tension value is set to 600KN, and the second tensioning is carried out. After the secondary stretching, when the tension value is maintained at a stable pressure for 3 minutes, the tensioning of this section of steel strand is completed, so as to achieve the purpose of forming a hoop with the interlocking piles. The structure encloses and tightens the ancient tree protection area through the triple support and limiting measures of interlocking piles, crown beams, and self-locking anchors. It not only ensures the stable support of the ancient tree protection area during the foundation pit excavation process, but also minimizes the impact of construction on the ancient trees, so that the ancient trees are effectively protected, achieving a reliable, economical, green and environmentally friendly effect, and providing a new process method for the harmonious coexistence of stable support construction in the ancient tree protection area and proper protection of ancient trees, and forming a new construction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the bite pile hoop-shaped tension self-locking structure provided by the utility model;

[0017] Figure 2 It is a top view structural schematic diagram of the bite pile hoop-shaped tension self-locking structure provided by the utility model;

[0018] Figure 3 It is a partial structural schematic diagram of a self-locking anchoring combination of a bite pile hoop-shaped tensioning self-locking structure provided by the utility model.

[0019] Figure 4 The utility model is a side view structural schematic diagram of a small anchor pier with a bite pile hoop-shaped tension self-locking structure provided by the utility model.

[0020] Description of reference numerals:

[0021] 1. Ancient tree; 2. Foundation pit; 3. Interlocking pile; 4. Crown beam; 5. Self-locking anchor combination; 6. Waist beam; 7. Large anchor pier; 8. Small anchor pier; 9. First steel strand; 10. Second steel strand; 11. Tension beam; 12. PVC pipe hole; 13. PVC pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Reference Figure 1-4 As shown, it is a preferred embodiment provided by the utility model.

[0026] The interlocking pile hoop-shaped tension self-locking structure comprises an ancient tree 1, a foundation pit 2 is opened on the outer ground of the ancient tree 1, interlocking piles 3 are arranged in the foundation pit 2, the tops of several interlocking piles 3 are cast with the same crown beam 4, two groups of self-locking anchoring assemblies 5 are distributed on several interlocking piles 3, each self-locking anchoring assembly 5 comprises waist beams 6 uniformly cast on the outside of several interlocking piles 3, two large anchor piers 7 are arranged at the openings of several waist beams 6, small anchor piers 8 are arranged between several waist beams 6 away from the large anchor piers 7, and the small anchor piers 8 and the large anchor piers 7 are cast on the interlocking piles 3. On the top, a first steel strand 9 is arranged between two large anchor piers 7 and adjacent small anchor piers 8. The two first steel strands 9 pass through the corresponding large anchor piers 7, waist beam 6 and small anchor piers 8 in sequence respectively. One end of the two first steel strands 9 close to the large anchor pier 7 is locked and installed on the large anchor pier 7, and the other end thereof is slidably connected to the corresponding small anchor pier 8. Every two adjacent small anchor piers 8 and the waist beam 6 between the two small anchor piers 8 form a group, and each group is provided with a second steel strand 10. The two ends of several second steel strands 10 are respectively locked and installed and slidably installed on the corresponding small anchor piers 8.

[0027] When the concrete strength of the large anchor pier 7, the small anchor pier 8 and the waist beam 6 in the present structure reaches 100%, the stretching work is carried out on the other end of the first steel strand 9 and the second steel strand 10. During the stretching, the end of the first steel strand 9 or the second steel strand 10 to be stretched is passed through the jack, and the jack tension is set to 300KN. The first steel strand 9 or the second steel strand 10 is stretched to a certain stroke. When the tension value is stably maintained for 3 minutes, the tensioning is stopped, the jack is closed, and the first tensioning is completed. After that, the jack tension value is set to 600KN, and the second stretching is carried out. When the tension value is maintained stably for 3 minutes, the tensioning is stopped, and the jack is closed. After maintaining the pressure steady for 3 minutes, the tensioning of this section of steel strand is completed, thereby achieving the purpose of forming the interlocking pile 3 into a hoop. The structure encloses and tightens the protection zone of the ancient tree 1 through the triple support and limiting measures of the interlocking pile 3, the crown beam 4, and the self-locking anchor combination 5, which not only ensures the stable support of the protection zone of the ancient tree 1 during the foundation pit excavation process, but also minimizes the impact of the construction on the ancient tree 1, so that the ancient tree 1 is effectively protected, achieving a reliable, economical, green and environmentally friendly effect, and providing a new process method for the harmonious coexistence of stable support construction of the protection zone of the ancient tree 1 and proper protection of the ancient tree 1, and forming a new construction technology.

[0028] Specifically, in this embodiment, the interlocking piles 3 are constructed by staggered construction of reinforced concrete piles and concrete piles, with the ends of the concrete piles 5m into the pit bottom and the ends of the reinforced concrete piles 8m into the pit bottom.

[0029] Through the staggered construction method of reinforced concrete piles and concrete piles, the interlocking piles have a sufficient embedding depth in the soil at the bottom of the foundation pit, so as to form a stable constraint on the pile end of the interlocking pile 3, improve the overall lateral displacement resistance of the interlocking pile, and prevent excessive displacement of the soil in the protection area of ​​the ancient tree 1.

[0030] Specifically, in this embodiment, the interlocking piles 3 are arranged 5 meters horizontally outward from the crown projection of the ancient tree 1 .

[0031] This distance setting effectively protects the growth space of the ancient tree 1 and ensures that the root system of the ancient tree 1 will not be damaged by the bite piles 3.

[0032] Specifically, in this embodiment, the snap pile 3 is an "Ω"-shaped enclosure wall.

[0033] The “Ω”-shaped retaining wall can provide soil retaining and water storage for the ancient tree 1, preventing nutrient loss. In addition, the “Ω”-shaped opening design allows the ancient tree 1 to continue to maintain its original growth environment. When nutrients in the protection area of ​​the ancient tree 1 are insufficient, they can be drawn from off-site land to ensure that the ancient tree 1 retains its natural growth ability.

[0034] Specifically, in this embodiment, a plurality of tension beams 11 are connected to the crown beam 4 , and both ends of the plurality of tension beams 11 are connected to the crown beam 4 .

[0035] A three-dimensional space is formed by combining a plurality of tension beams 11, a plurality of interlocking piles 3 and a cap beam 4, so that the soil at the location is confined within the space, thereby achieving the purpose of jointly limiting the displacement of the top soil.

[0036] Specifically, in this embodiment, the size of the cap beam 4 is 1.4m×0.8m, and the size of the tension beam 11 is 1.4m×0.4m.

[0037] Specifically, in this embodiment, a PVC pipe hole 12 with a diameter of 60 mm is reserved on each of the two large anchor piers 7 .

[0038] By reserving a pipeline hole 12 on the large anchor pier 7 , the first steel strands 9 on the two waist beams 6 between the large anchor pier 7 and the small anchor pier 8 can be locked and installed on the corresponding large anchor pier 7 .

[0039] Specifically, in this embodiment, two PVC pipe holes 12 with a diameter of 60 mm are reserved on each of the small anchor piers 8 .

[0040] By reserving two PVC pipe holes 12 on the small anchor pier 8, the first steel strands 9 or the second steel strands 10 on both sides of the small anchor pier 8 can be locked or slidably installed with the small anchor pier 8 through the corresponding PVC pipe holes 12 respectively.

[0041] Specifically, in the present embodiment, a plurality of the PVC pipe holes 12 are each installed with a PVC pipe 13 , and the PVC pipe 13 is compatible with the first steel strand 9 and the second steel strand 10 .

[0042] The first steel strand 9 and the second steel strand 10 are adapted to be slidably installed in the PVC pipe 13, so that the PVC pipe 13 provides a guiding effect for the first steel strand 9 and the second steel strand 10, thereby avoiding the first steel strand 9 and the second steel strand 10 directly contacting and rubbing with the concrete surface, causing deformation and damage to the concrete surface.

[0043] Specifically, in this embodiment, the interlocking piles 3 are tied to the corresponding steel bars inside the crown beam 4, the pile head steel bars of the reinforced concrete pile extend into the crown beam 4, and the steel bars at both ends of the tension beam 11 are connected to the pile head steel bars of the reinforced concrete pile and the steel bars of the crown beam 4.

[0044] The joint construction by connecting with steel bars makes the connection between the interlocking pile 3, the cap beam 4 and the tension beam 11 more stable.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-locking structure of interlocking piles and hoop-shaped tensioning, including an ancient tree, characterized in that: A foundation pit is opened on the outer ground of the ancient tree, and interlocking piles are arranged in the foundation pit. The tops of several interlocking piles are cast with the same crown beam, and two groups of self-locking anchor combinations are distributed on several interlocking piles, each self-locking anchor combination includes waist beams evenly cast on the outside of several interlocking piles, two large anchor piers are arranged at the openings of several waist beams, and small anchor piers are arranged between several waist beams far away from the large anchor piers, and the small anchor piers and the large anchor piers are cast on the interlocking piles, and first steel strands are arranged between the two large anchor piers and the adjacent small anchor piers, and the two first steel strands pass through the corresponding large anchor piers, waist beams and small anchor piers in turn, and one end of the two first steel strands close to the large anchor pier is locked and installed on the large anchor pier, and the other end thereof is slidably connected to the corresponding small anchor pier, and every two adjacent small anchor piers and the waist beam between the two small anchor piers form a group, and each group is provided with a second steel strand, and the two ends of several second steel strands are respectively locked and installed and slidably installed on the corresponding small anchor piers.

2. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: The interlocking piles are constructed by staggered reinforced concrete piles and concrete piles, with the ends of the concrete piles 5m into the pit bottom and the ends of the reinforced concrete piles 8m into the pit bottom.

3. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: The interlocking piles are set 5m horizontally outward along the projection of the crown of the ancient tree.

4. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: The interlocking pile is an "Ω"-shaped retaining wall.

5. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: A plurality of tension beams are connected to the crown beam, and both ends of the plurality of tension beams are connected to the crown beam.

6. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: The size of the cap beam is 1.4m×0.8m, and the size of the tension beam is 1.4m×0.4m.

7. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: A PVC pipe hole with a diameter of 60 mm is reserved on each of the two large anchor piers.

8. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: Two PVC pipe holes with a diameter of 60 mm are reserved on the several small anchor piers.

9. The interlocking pile hoop-shaped tension self-locking structure according to any one of claims 7 to 8, characterized in that: PVC pipes are installed in a plurality of the pipe holes, and the PVC pipes are compatible with the first steel strand and the second steel strand.

10. The interlocking pile hoop-shaped tension self-locking structure according to claim 1, characterized in that: The interlocking piles are tied with the corresponding steel bars inside the crown beam, the pile head steel bars of the reinforced concrete pile extend into the crown beam, and the steel bars at both ends of the tension beam are connected with the pile head steel bars of the reinforced concrete pile and the steel bars of the crown beam.

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