Deep backfill foundation ramming area limiting anchoring grid

Abstract

The utility model discloses a kind of deep backfill foundation ramming area limiting anchoring grating, including at least one grating unit, it includes the rectangular frame enclosed by basalt fiber bundle, rectangular frame outside is provided with the fixing piece for connecting support pole or adjacent grating unit, several sign blocks corresponding with ramming point position are set in rectangular frame, sign block includes the circular frame enclosed by basalt fiber bundle, circular frame is provided with the sign structure for indicating ramming sequence formed by polyurethane fiber bundle, rectangular frame and circular frame are connected together by warp and weft net formed by basalt fiber bundle.The utility model limits by the sign block of grating unit inner arrangement ramming point, guarantees the drop point position of heavy hammer of dynamic compaction method construction, drop hammer sequence and ramming number of times, improves dynamic compaction method construction normative, improves foundation anti-deformation capacity, improves the overall stress uniformity of tamping filler, reduces the occurrence of foundation uneven settlement phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of mine backfilling technology, and in particular to a limiting anchoring grid for deep backfill foundation compaction area. Background Technology

[0002] Mining activities in coal, limestone, and other mineral areas often lead to geological environmental damage, resulting in numerous mine pits and low-lying areas. Early backfilling projects used fillers such as slag, construction waste, or sand, which could solve the problem of waste storage and provide a new foundation. However, due to disordered construction and management, this easily led to problems such as loose and thick accumulation of fillers, uneven settlement, and weak foundation bearing capacity, which in turn threatened the safety of subsequent building structures.

[0003] To address defects in backfill foundations, especially in deep backfill projects exceeding 5 meters, dynamic compaction is widely used. Dynamic compaction, also known as dynamic consolidation, utilizes the impact vibration energy of a free-falling hammer to powerfully compact the soil, improving its bearing capacity and resistance to deformation. It boasts advantages such as high efficiency, economy, and environmental friendliness, and is applied in industrial construction, highways, airports, and other fields. However, as a technically demanding construction method, improper operation, such as deviation from the predetermined compaction position or disordered compaction passes, can lead to substandard construction quality, manifesting as insufficient bearing capacity, uneven compaction, and even localized settlement. This not only negates its advantages but may also exacerbate existing problems and affect the safety of above-ground structures. Therefore, in backfill foundation treatment, it is necessary to improve construction standards to achieve the beneficial effects of dynamic compaction and avoid cyclical risks. Summary of the Invention

[0004] This utility model provides a limiting anchoring grid for the compaction zone of deep backfill foundations, used to standardize the compaction position and indicate the compaction sequence, regulate compaction construction, and solve the problem of substandard quality in dynamic compaction construction. Specifically, the following technical solution can be adopted: The deep backfill foundation compaction zone limiting anchoring grid of this utility model includes at least one grid unit. The grid unit includes a rectangular frame formed by basalt fiber bundles. The outer side of the rectangular frame is provided with a fixing member for connecting a support rod or an adjacent grid unit. Several marker blocks corresponding to the compaction points are provided inside the rectangular frame. The marker block includes a circular frame formed by basalt fiber bundles. The circular frame is provided with a marker structure made of polyurethane fiber bundles for indicating the compaction sequence. The rectangular frame and the circular frame are connected together by a warp and weft grid made of basalt fiber bundles.

[0005] The aforementioned anchoring grid consists of one or more grid units. Adjacent grid units are connected together by fasteners. Grid units at the edges are connected to support rods installed around the compaction zone by fasteners, thus positioning the grid units above the compaction zone. Marker blocks on the grid units indicate the compaction location, and different marker structures can indicate the compaction sequence at each compaction point. Through compaction, the fiber bundles at the marker blocks are compacted into the foundation along with the backfill soil. This, combined with the limiting effect of the support rods at the edge of the anchoring grid, strengthens the limiting of the anchoring grid. Finally, with the completion of the full compaction construction, the entire anchoring grid is embedded inside the foundation, enhancing the bearing capacity of the foundation.

[0006] Preferably, the fixing component uses hooks evenly spaced on the outer side of the rectangular frame. These hooks are connected to hooks of adjacent grid units or to support rods arranged around the compaction zone. The hooks are simple, readily available, and inexpensive, allowing for easy interlocking or connection to support rods, thus quickly completing the positioning and installation of the anchored grid.

[0007] Preferably, the compaction points include spot compaction points, insertion compaction points, and reinforcement compaction points. The classification of the above-mentioned compaction points can be selected and set according to the dynamic compaction scheme of the plot, and then the specific structure of the marker blocks can be set according to the compaction method and compaction sequence of different compaction points.

[0008] Preferably, the marker blocks are arranged uniformly in a rectangular dot matrix within a rectangular frame. Preferably, the diameter of the marker block is 3m, and five marker blocks are arranged in each row and column within a square frame with dimensions of 30m × 30m, with a center-to-center distance of 6m between two adjacent marker blocks.

[0009] Preferably, the marker structure comprises transverse polyurethane fiber bundles arranged at uniform intervals, with both ends of each transverse polyurethane fiber bundle connected to a circular frame.

[0010] Furthermore, the marker structure includes vertical polyurethane fiber bundles arranged at uniform intervals, with both ends of each vertical polyurethane fiber bundle connected to a circular frame.

[0011] Furthermore, the marker structure includes uniformly spaced left-angled polyurethane fiber bundles, each bundle having both ends connected to a circular frame. Preferably, the left-angled polyurethane fiber bundles form a 45° angle with the vertical direction.

[0012] Furthermore, the marker structure includes evenly spaced right-angled polyurethane fiber bundles, each bundle having both ends connected to a circular frame. Preferably, the right-angled polyurethane fiber bundles form a 45° angle with the vertical direction.

[0013] Through the above four marking structures, different tamping points are distinguished. According to the dynamic compaction plan for this plot, different forms of tamping operations are carried out on the corresponding tamping points in a predetermined order, so as to make the compacted filler form a uniformly stressed whole, reduce the occurrence of uneven settlement, and improve the bearing capacity of the foundation.

[0014] In addition, the marking structure can also be distinguished by being set into other shapes. For example, the polyurethane fiber bundles are set into Chinese characters such as one, two, three, etc., or numbers such as 1, 2, 3, etc., or triangles, square frames, etc. Considering the manufacturing difficulty and the stretching elastic range of the fiber bundles comprehensively, the best choice for the marking structure is the scheme of arranging the polyurethane fiber bundles horizontally, vertically, and obliquely.

[0015] The deep backfill foundation tamping area limit and anchoring grid provided by the present utility model has a simple structure, is convenient to use, and has accurate positioning. It limits the tamping points through the marking blocks arranged in the grid unit, ensuring the falling point position, hammer falling order, and tamping passes of the heavy hammer in the dynamic compaction method construction, and improving the construction standardization of the dynamic compaction method; when the high-elastic polyurethane fibers at the marking blocks are tamped into the foundation along with the backfill soil at the tamping points, multi-point limit and anchoring of the anchoring grid are formed, which cooperate with the limiting effect of the support rods at the edge of the anchoring grid to further limit the slip of the anchoring grid. Due to accurate falling points and reasonable hammer falling order, the overall stress uniformity of the compacted filler is effectively improved, and the occurrence of uneven settlement of the foundation is reduced; when the whole anchoring grid is buried inside the foundation, due to the action of the high-strength basalt fiber bundles, the bearing capacity of the foundation is effectively improved, and the foundation's anti-deformation ability is significantly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model.

[0017] Figure 2 is Figure 1 the structural schematic diagram of the grid unit in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe the embodiments of the present utility model in detail with reference to the drawings. This embodiment is implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0019] Such as Figure 1 、 2As shown, the deep backfill foundation compaction zone limiting anchoring grid of this utility model is composed of six grid units. Each grid unit is 30m×30m in size and includes a square frame 1 enclosed by basalt fiber bundles with a diameter of 0.1~0.5mm. The basalt fiber bundles are woven from multiple basalt fibers with a single filament of 6~13μm (the same below). Multiple hooks 2 are evenly spaced on the outside of the square frame 1. 25 marker blocks 3 are evenly arranged in a five-row, five-column dot matrix inside the square frame 1. The marker blocks 3 correspond to the point compaction points, insertion compaction points, and reinforcement compaction points in the dynamic compaction scheme of the plot. Each marker block 3 includes a circular frame 31 enclosed by basalt fiber bundles with a diameter of 0.1~0.5mm. The circular frame 31 contains a marker structure made of high-elastic polyurethane fiber bundles to indicate the compaction sequence. The square frame 1 and the circular frame 31 are connected together by a warp and weft mesh 4 made of basalt fiber bundles of 0.1~0.5mm. The mesh size of the aforementioned warp and weft mesh 4 is 12.7mm×12.7mm or 25.4mm×25.4mm.

[0020] In this embodiment, the diameter of the circular frame 31 is 3m, and the distance between the centers of adjacent circular frames 31 is 6m. The marking structures within the circular frame 31 are divided into four types. The first type consists of horizontal polyurethane fiber bundles 321 evenly spaced within the circular frame 31, with both ends of each horizontal polyurethane fiber bundle 321 connected to the circular frame 31; this is called the first marking structure. The second type consists of vertical polyurethane fiber bundles 322 evenly spaced within the circular frame 31, with both ends of each vertical polyurethane fiber bundle 322 connected to the circular frame 31; this is called the second marking structure. The third type consists of left-sloping polyurethane fiber bundles 323 evenly spaced within the circular frame 31 at a 45° angle to the vertical, with both ends of each left-sloping polyurethane fiber bundle 323 connected to the circular frame 31; this is called the third marking structure. The fourth type consists of right-sloping polyurethane fiber bundles 324 evenly spaced within the circular frame 31 at a 45° angle to the vertical, with both ends of each right-sloping polyurethane fiber bundle 324 connected to the circular frame 31; this is called the fourth marking structure.

[0021] In use, support rods 5 are set around the compaction area, and hooks 2 are used to connect the grid units located in the middle. Then, hooks 2 located on the outer perimeter of the grid units are attached to the support rods 5, so that the entire anchored grid covers the compaction area, and each marker block 3 on it corresponds to the compaction point in the dynamic compaction scheme of the plot. In this embodiment, point compaction, insertion compaction, reinforcement compaction and full compaction are carried out in sequence. Specifically, firstly, soil is spread and covered with high-elastic polyurethane fiber bundles on the marker block 3 where the first marker structure is located. After measuring the ground elevation, the marker block 3 is point compacted using a dynamic compaction machine. After the construction is completed, the compaction pit is backfilled and leveled. Then, following the above steps, point compaction is carried out on the marker block 3 where the second marker structure is located. After the point compaction is completed, insertion compaction is carried out. First, soil was spread and covered with high-elastic polyurethane fiber bundles on marker block 3, where marker structure No. 3 is located. After measuring the ground elevation, a dynamic compaction machine was used to compact marker block 3. After the construction was completed, the compaction pits were backfilled and leveled. Next, following the above steps, point compaction was carried out on marker block 3, where marker structure No. 4 is located. After the initial compaction was completed, reinforcement compaction was carried out. First, the ground elevation was measured, and reinforcement compaction was carried out on marker blocks 3, where marker structures No. 1 and No. 3 are located. The compaction pits were backfilled and leveled. Then, after measuring the ground elevation, reinforcement compaction was carried out on marker blocks 3, where marker structures No. 2 and No. 4 are located. The compaction pits were backfilled and leveled. After reinforcement compaction, soil was spread and covered on the entire anchoring grid, and a full compaction was carried out. After the full compaction, the compaction depth of the area between marker blocks 3 was consistent with that of marker blocks 3. The entire site was compacted. Afterward, the site was leveled, the elevation was measured, and the site was inspected and accepted.

[0022] The above-mentioned operation of positioning and sequence of hammer drops using different marker blocks 3 ensures the standardized and orderly construction of the dynamic compaction method. Furthermore, during construction, basalt fiber bundles are buried in the foundation compaction area, which effectively improves the bearing capacity of the foundation and makes the compacted fill material form a uniformly stressed whole, thereby reducing the occurrence of uneven settlement.

[0023] It should be noted that in the description of this utility model, terms such as "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The marking structure of the marker block 3 and the specific scheme for dynamic compaction construction described above are merely detailed explanations of this embodiment, intended to help the reader understand the technical solution of this utility model, and not as limitations on this utility model.

Claims

1. A limiting anchoring grid for deep backfill foundation compaction zone, characterized in that: It includes at least one grid unit, the grid unit comprising a rectangular frame formed by basalt fiber bundles, the outer side of the rectangular frame being provided with a fixing member for connecting a support rod or an adjacent grid unit, the rectangular frame being provided with a plurality of marker blocks corresponding to the tamping points, the marker blocks comprising a circular frame formed by basalt fiber bundles, the circular frame being provided with a marker structure made of polyurethane fiber bundles for indicating the tamping sequence, the rectangular frame and the circular frame being connected together by a warp and weft grid formed by basalt fiber bundles.

2. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The fasteners are hooks that are evenly spaced on the outside of a rectangular frame. The hooks are connected to the hooks of adjacent grid units or to the support rods that are arranged around the compaction area.

3. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The compaction points include point compaction points, insertion compaction points, and reinforcement compaction points.

4. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The marker blocks are arranged uniformly in a rectangular dot matrix within a rectangular border.

5. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The marker structure comprises transverse polyurethane fiber bundles arranged at uniform intervals, with each transverse polyurethane fiber bundle connected to a circular frame at both ends.

6. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The marker structure comprises vertical polyurethane fiber bundles arranged at uniform intervals, with each vertical polyurethane fiber bundle connected to a circular frame at both ends.

7. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The marker structure comprises uniformly spaced left-sloping polyurethane fiber bundles, with each left-sloping polyurethane fiber bundle connected to a circular frame at both ends.

8. The deep backfill foundation compaction zone limiting anchoring grid according to claim 1, characterized in that: The marker structure comprises evenly spaced right-angled polyurethane fiber bundles, with each right-angled polyurethane fiber bundle connected to a circular frame at both ends.

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