Foundation construction structure

Abstract

The utility model discloses a foundation construction structure. The foundation construction structure comprises a rock base layer, a bottom backfilling and tamping layer, a middle backfilling and tamping layer and a top backfilling and tamping layer. An over-excavation step pit is formed in the side edge of the rock base layer, the bottom backfilling and tamping layer is backfilled and tamped at the bottom of the step pit, the middle backfilling and tamping layer is backfilled and tamped on the bottom backfilling and tamping layer, and a stress net A for dispersing loads is arranged between the middle backfilling and tamping layer and the bottom backfilling and tamping layer. A top backfilling and tamping layer is backfilled and tamped on the middle backfilling and tamping layer, and a stress net B for dispersing loads is arranged between the middle backfilling and tamping layer and the top backfilling and tamping layer. When the top backfill compaction layer is hardened to bear heavy load conditions such as vehicle walking, the load is transmitted to the stress net A through the top backfill compaction layer for load dispersion, and then is transmitted to the stress net B through the middle backfill compaction layer for load dispersion, so that the problem of settlement due to the fact that local stress cannot be shared is solved.

Description

Technical Field

[0001] The utility model relates to a foundation construction structure and belongs to the technical field of construction. Background Art

[0002] For over-excavated foundations, secondary backfilling is required before hardening the top. To ensure the firmness of the foundation backfill, backfilling needs to be carried out in layers and compacted.

[0003] The existing backfill and compacted foundation is shown in Chinese patent publication number CN106049508B. A layer of water cushion of pit bottom debris is first backfilled at the bottom, and then the soil is filled and compacted. For the later use of the foundation, the local part needs to bear heavy loads such as vehicles passing by, which easily leads to the problem of settlement due to the inability to distribute the local force. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a foundation construction structure.

[0005] The utility model is achieved through the following technical solutions.

[0006] The utility model provides a foundation construction structure, comprising:

[0007] Rock base layer, bottom backfill and compaction layer, middle backfill and compaction layer, and top backfill and compaction layer.

[0008] There is an over-excavated step pit on the side of the rock base layer, and the bottom backfill and compaction layer is backfilled and compacted at the bottom of the step pit. There is a middle backfill and compaction layer backfilled and compacted on the bottom backfill and compaction layer. There is a force network A for distributing the load between the middle backfill and compaction layer and the bottom backfill and compaction layer. There is a top backfill and compaction layer backfilled and compacted on the middle backfill and compaction layer. There is a force network B for distributing the load between the middle backfill and compaction layer and the top backfill and compaction layer.

[0009] The force-bearing net A and the force-bearing net B are composed of slope protection nets.

[0010] The root filling portions at the ends of the force-bearing nets A and B are pre-buried and fixed in the rock base.

[0011] It also includes load-bearing piles composed of steel cages and cured concrete.

[0012] The stressed piles penetrate the bottom backfill compaction layer, the middle backfill compaction layer, and the top backfill compaction layer and extend into the rock base layer. The stressed piles are integrally and fixedly connected to the stressed nets A and B.

[0013] The beneficial effect of the present invention is that when the top backfill compaction layer is hardened to withstand heavy loads such as vehicle movement, the load is transferred to the force-bearing network A through the top backfill compaction layer for load dispersion, and then transferred to the force-bearing network B through the middle backfill compaction layer for load dispersion, avoiding the problem of settlement caused by local force not being able to be distributed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a distribution diagram of the utility model;

[0015] In the figure: 1-rock base; 11-step pit; 21-bottom backfill and compaction layer; 22-middle backfill and compaction layer; 23-top backfill and compaction layer; 31-load-bearing network A; 32-load-bearing network B; 4-fill root; 5-load-bearing pile. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0017] like Figure 1 shown.

[0018] A foundation construction structure of the present application includes:

[0019] As the original unexcavated rock base 1, there is an over-excavated step pit 11 on the side of the rock base 1. The bottom of the step pit 11 is backfilled and compacted with a bottom backfill compaction layer 21, and a middle backfill compaction layer 22 is backfilled and compacted on the bottom backfill compaction layer 21. A load-bearing net A31 is provided between the middle backfill compaction layer 22 and the bottom backfill compaction layer 21 for distributing the load. A top backfill compaction layer 23 is backfilled and compacted on the middle backfill compaction layer 22, and a load-bearing net B32 is provided between the middle backfill compaction layer 22 and the top backfill compaction layer 23 for distributing the load. The load-bearing net A31 and the load-bearing net B32 are composed of slope protection nets. When the middle backfill compaction layer 22 is multi-layered, the load-bearing net B32 is installed between the middle backfill compaction layers 22 to distribute the load. The ends of the load-bearing net A31 and the load-bearing net B32 are pre-buried and fixed in the rock base 1 through the root filling part 4 formed by concrete curing.

[0020] When the top backfill compaction layer 23 is hardened to withstand heavy loads such as vehicle movement, the load is transferred to the load-bearing network A31 through the top backfill compaction layer 23 for load dispersion, and then transferred to the load-bearing network B32 through the middle backfill compaction layer 22 for load dispersion, avoiding the problem of settlement caused by local force not being distributed.

[0021] After the bottom backfill compaction layer 21, the middle backfill compaction layer 22, and the top backfill compaction layer 23 are backfilled, a pile hole is drilled, a steel cage is placed in the pile hole, and concrete is poured and solidified to form a load-bearing pile 5. The load-bearing pile 5 penetrates the bottom backfill compaction layer 21, the middle backfill compaction layer 22, and the top backfill compaction layer 23 and extends into the rock base layer 1. When the load-bearing pile 5 is poured under high pressure, the concrete flows and solidifies along the load-bearing net A31 and the load-bearing net B32, so that the load-bearing net A31, the load-bearing net B32 and the load-bearing pile 5 can form a whole. When the load-bearing net A31 and the load-bearing net B32 are stressed and the load is dispersed, part of the load can be directly transferred to the rock base layer 1 through the load-bearing pile 5.

Claims

1. A foundation construction structure, characterized in that: include: Rock base layer (1), bottom backfill compaction layer (21), middle backfill compaction layer (22), top backfill compaction layer (23); The rock base layer (1) has an over-excavated step pit (11) on the side, a bottom backfill compaction layer (21) is backfilled and compacted at the bottom of the step pit (11), a middle backfill compaction layer (22) is backfilled and compacted on the bottom backfill compaction layer (21), a load-distributing force net A (31) is provided between the middle backfill compaction layer (22) and the bottom backfill compaction layer (21), a top backfill compaction layer (23) is backfilled and compacted on the middle backfill compaction layer (22), and a load-distributing force net B (32) is provided between the middle backfill compaction layer (22) and the top backfill compaction layer (23).

2. The foundation construction structure according to claim 1, characterized in that: The force-bearing net A (31) and the force-bearing net B (32) are composed of slope protection nets.

3. The foundation construction structure according to claim 1, characterized in that: The root filling portions (4) at the ends of the force-bearing net A (31) and the force-bearing net B (32) are pre-buried and fixed in the rock base (1).

4. The foundation construction structure according to claim 1, characterized in that: It also includes a load-bearing pile (5) composed of a steel cage and solidified concrete.

5. The foundation construction structure according to claim 4, characterized in that: The stressed piles (5) penetrate the bottom backfill compaction layer (21), the middle backfill compaction layer (22), and the top backfill compaction layer (23) and extend into the rock base layer (1); the stressed piles (5) are integrally and fixedly connected to the stressed net A (31) and the stressed net B (32).

Images