Sedimentation foundation reinforcing structure
By using a double-layer structure reinforcement process to form a composite foundation reinforcement layer and a stabilization layer, the problems of foundation settlement prediction errors and poor grouting treatment effects were solved, thereby improving the foundation bearing capacity and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 山东隆达伟业地基加固技术有限公司
- Filing Date
- 2024-09-02
- Publication Date
- 2026-05-19
AI Technical Summary
Existing methods for predicting foundation settlement differ significantly from actual results, and existing reinforcement structures are ineffective during grouting treatment, affecting their performance.
A double-layer structure reinforcement process is adopted to form a composite foundation reinforcement layer and a stabilization layer. Grout is injected through grouting holes to form an integral structure, which increases the bearing capacity of the foundation. The stabilization layer serves as a load-bearing layer to improve the stability of the foundation.
It effectively improves the bearing capacity of the foundation, meets design requirements, increases foundation stability, and achieves the leveling and reinforcement effects of the equipment foundation.
Smart Images
Figure CN224259324U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foundation settlement reinforcement technology, and more specifically, to a settlement foundation reinforcement structure. Background Technology
[0002] Foundation settlement refers to the subsidence of the foundation surface caused by the compaction of the foundation soil layers under additional stress. Excessive settlement, especially uneven settlement, can cause buildings to tilt, crack, and become unusable. Existing foundation settlement prediction methods are limited by the significant discrepancies between their assumptions and actual conditions, often resulting in substantial differences between predicted and measured settlement values. Further research is needed to develop foundation settlement prediction methods.
[0003] A search revealed a foundation settlement prevention and reinforcement structure with publication number CN219862902U. This structure includes several foundation piles, several water-stop piles, several base slabs, and backfill material. The foundation piles are installed within the foundation pit, the water-stop piles surround the pit, and the base slabs are laid at the bottom of the pit. The foundation piles and the water-stop piles are all fixedly connected to each other via the base slabs. Several drainage holes are provided on the base slabs, and the backfill material is placed on top of the base slabs, filling the foundation pit. This structure can reduce the impact of rainfall on foundation settlement and effectively lower the probability of foundation settlement.
[0004] For settlement foundations, grouting cannot be effectively performed during reinforcement, affecting the performance. Therefore, we propose a settlement foundation reinforcement structure to solve the above-mentioned problems. Utility Model Content
[0005] 1. Technical problems to be solved
[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a settlement foundation reinforcement structure. The composite foundation reinforcement layer is formed by the solidification of the original foundation below the foundation slab and grout. The grout is injected into the original foundation through foundation reinforcement grouting holes, causing it to solidify and form an integral composite foundation reinforcement structure, thereby improving the foundation bearing capacity. Below the composite foundation reinforcement layer, a stabilization layer is arranged. This stabilization layer is formed by repeated grouting to create a solidified zone. Due to the heterogeneity of the soil, the solidified zone will exhibit a plate-like or root-like distribution, causing the fill soil in this area to be compressed and compacted, increasing the stability of the foundation. This stabilization layer, while increasing foundation stability, also serves as a bearing layer for reinforcement and lifting. The composite foundation reinforcement layer and the composite foundation stabilization layer form a double-layer support system, achieving the purpose of reinforcing and leveling the equipment foundation.
[0007] 2. Technical Solution
[0008] To solve the above problems, the present invention adopts the following technical solution.
[0009] A settlement foundation reinforcement structure includes a ground slab body, a composite foundation reinforcement layer fixedly connected to the bottom of the ground slab body, a composite foundation stabilization layer fixedly connected to the bottom of the composite foundation reinforcement layer, and a load-bearing layer fixedly connected to the bottom of the composite foundation stabilization layer.
[0010] The surface of the main floor structure is provided with grouting channels and grouting holes.
[0011] Preferably, the grouting channel and the grouting hole of the main floor structure are connected.
[0012] Preferably, the grouting holes penetrate the main floor structure, the composite foundation reinforcement layer, and the composite foundation stabilization layer sequentially from top to bottom.
[0013] Preferably, the through end of the grouting hole extends into the interior of the bearing layer.
[0014] Preferably, there are multiple grouting holes, and a gap is provided between each of the multiple grouting holes.
[0015] 3. Beneficial effects
[0016] Compared with existing technologies, the advantages of this utility model are:
[0017] (1) This scheme adopts a double-layer structure reinforcement grouting process to form a composite foundation reinforcement layer and a composite foundation stabilization layer for the building foundation. The dual combination effectively improves the bearing capacity of the foundation and ensures that the original design requirements and technical indicators are met. The composite foundation reinforcement layer is formed by the solidification of the original foundation below the foundation slab and the grout. The grout is injected into the original foundation through the foundation reinforcement grouting holes, which solidifies it to form an integral composite foundation reinforcement structure, thereby improving the bearing capacity of the foundation. The stabilization layer is arranged below the composite foundation reinforcement layer. The composite foundation stabilization layer is formed by repeated grouting to create a solidified area. Due to the heterogeneity of the soil, the solidified area will show a plate-like or root-like distribution, which will compress and compact the fill in this area to increase the stability of the foundation. This stabilization layer not only increases the stability of the foundation, but also serves as a bearing layer for reinforcement and lifting. The composite foundation reinforcement layer and the composite foundation stabilization layer form a double-layer support system to achieve the purpose of equipment foundation reinforcement and leveling. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a schematic diagram of the main body of the floor and the grouting hole structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the main cross-sectional structure of the flooring of this utility model.
[0021] Explanation of the labels in the diagram:
[0022] 1. Main floor structure; 2. Composite foundation reinforcement layer; 3. Composite foundation stabilization layer; 4. Bearing layer; 5. Grouting channel; 6. Grouting hole. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0024] Example 1:
[0025] Please see Figure 1-3 A settlement foundation reinforcement structure includes a ground body 1, a composite foundation reinforcement layer 2 fixedly connected to the bottom of the ground body 1, a composite foundation stabilization layer 3 fixedly connected to the bottom of the composite foundation reinforcement layer 2, and a bearing layer 4 fixedly connected to the bottom of the composite foundation stabilization layer 3.
[0026] The surface of the main floor 1 is provided with grouting channels 5 and grouting holes 6.
[0027] The grouting channel 5 and the grouting hole 6 of the main body of the ground 1 are connected. The grouting hole 6 passes through the main body of the ground 1, the composite foundation reinforcement layer 2 and the composite foundation stabilization layer 3 from top to bottom. The penetrating end of the grouting hole 6 extends into the interior of the bearing layer 4. There are multiple grouting holes 6, and gaps are provided between the multiple grouting holes 6.
[0028] During use: Equipment and personnel arrive on site → Construction briefing → On-site surveying → Hole location determination → Drilling rig positioning → Drilling rig hole formation → Grout mixing → Grouting → Hole sealing.
[0029] On-site measurement: Based on the actual elevation of the stable, non-settled areas as relative elevations, on-site measurements are taken, marked, and recorded to prepare for subsequent reinforcement work in the areas requiring reinforcement. On-site technicians divide the settlement area into grid segments for measurement, generating original records, uniformly calculating settlement data for the settlement area, and recording it. The final reinforcement area should be determined after comprehensive consideration of ground safety and actual site conditions.
[0030] Hole Location Determination: Based on the approved reinforcement design drawings and the actual site conditions, location markers should be made. When drilling holes, construction personnel must strictly adhere to the requirements (vertical or inclined drilling), adjusting the layout according to the specific site conditions to achieve the optimal hole arrangement. The actual hole layout should be adjusted based on the actual site conditions, including adjusting the hole positions and number of holes. If certain areas on site do not allow or are not feasible for hole placement, inclined drilling should be used, or the number of holes should be reduced while increasing the grouting volume to achieve the purpose of reinforcing the foundation below.
[0031] Drilling rig positioning: The drilling rig layout, also known as the grouting reinforcement sequence, proceeds from the outside in, gradually advancing the construction from areas with large settlement to areas with small settlement. After the drilling rig is in place, it is leveled and centered, and the angle of the drill rod is adjusted. Once aligned with the hole position, the drilling rig must not be moved. Before drilling, the equipment is run idle to ensure that the drilling rig can operate normally.
[0032] Drilling: Hole formation was achieved using an integrated drilling and grouting machine, with a hole diameter of 42mm. Depending on the site conditions, either water drilling or direct drilling was employed initially. During the drilling process, personnel closely monitored changes in the borehole to ensure orderly and smooth progress. Real-time records were kept during drilling to provide reference data for grouting operations. The depth of the deepened holes was determined based on the design drawings and actual site conditions.
[0033] Grout preparation: This project uses A and C non-shrink two-component grout. The mix ratio is adjusted reasonably according to the actual site conditions to ensure no shrinkage after setting and hardening. The resulting structure has high strength and strong impermeability, meeting the foundation bearing capacity requirements. To control the grout setting time, grout diffusion radius, and achieve good grouting and sealing effects, the mix ratio must be strictly followed. During mixing, no rope ends, paper scraps, or other debris should be placed into the mixer. The mixing time should not be less than 3 minutes to avoid uneven mixing. The mixed grout must be filtered through a sieve before entering the grouting machine. Based on practical engineering experience from similar projects and the technical performance parameters of the grout, the setting time can be accurately controlled within a few seconds to tens of seconds. The setting time can be reasonably proportioned according to the actual site conditions to achieve the desired ideal state.
[0034] Grouting Operation: According to relevant regulations for reinforcement projects, the grouting pressure of each hole should be strictly controlled. The grouting pressure should be 0.5–1.2 MPa (adjusted according to actual site conditions). The grouting pressure should be appropriately increased during lifting, and the dynamic condition of the ground should be constantly observed (adjusting the grouting pressure in real time according to actual site conditions). The grout flow rate should also be closely monitored. If the pressure suddenly rises or falls, or grout overflows, grouting should be stopped immediately. The cause of the abnormality must be identified, and necessary measures (adjusting grouting parameters, relocation, drilling angled holes, etc.) must be taken before grouting can continue. Grouting must be continuous. If interruption occurs, the cause of the interruption should be identified, and corrective measures should be taken as soon as possible to resume grouting. Grouting should be carried out in sequence. If cross-contamination occurs, the cross-contamination holes should be grouted simultaneously. Dust control of grouting materials is achieved by enclosing the site with barriers; grout diffusion is controlled by adjusting the grout mix ratio to control the grout's penetration capacity and setting speed; grouting pressure is controlled by constantly observing the dynamic condition of the ground, the grouting pressure gauge readings, and the skilled operation of the grouting machine. Grouting pressure is used as the control indicator; grouting can be stopped once the design pressure is reached. If the grouting pressure fails to meet the design requirements after testing, the design should be adjusted and grouting should be completed in a timely manner.
[0035] The first step is to fill and grout the reinforcement layer below the foundation slab to fill the voids in the soil layer and improve the overall strength of the foundation; each time the height is increased by 0.3-0.5m.
[0036] The second step, after the composite foundation reinforcement layer is completed, is to construct the composite foundation stabilization layer according to the design. This involves a drilling-and-grouting integrated retreating grouting method, with repeated grouting to form a consolidation zone; each grouting lift is approximately 1 meter. The overall construction sequence follows a principle of proceeding from the outside in, and from areas of greater settlement to areas of less settlement, gradually advancing the construction process.
[0037] Sealing: After grouting is completed, the hole opening is sealed and smoothed with grouting material or high-grade mortar.
[0038] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.
Claims
1. A structure for reinforcing a settlement ground foundation, comprising a ground floor body (1), characterized in that: The bottom of the main body of the ground (1) is fixedly connected to a composite foundation reinforcement layer (2), the bottom of the composite foundation reinforcement layer (2) is fixedly connected to a composite foundation stabilization layer (3), and the bottom of the composite foundation stabilization layer (3) is fixedly connected to a bearing layer (4). The surface of the floor body (1) is provided with grouting channels (5) and grouting holes (6). The composite foundation reinforcement layer (2) is formed by the solidification of the original foundation below the foundation plate and the grout. The grout is injected into the original foundation through the foundation reinforcement grouting hole, so that it is solidified to form an integral composite foundation reinforcement structure; the composite foundation stabilization layer (3) is a solidified area formed by repeated grouting.
2. A settlement ground foundation reinforcing structure according to claim 1, wherein: The grouting channel (5) and the grouting hole (6) of the main body of the floor (1) are connected.
3. A settlement foundation reinforcing structure according to claim 1, wherein: The grouting hole (6) passes through the main body of the ground (1), the composite foundation reinforcement layer (2) and the composite foundation stabilization layer (3) from top to bottom.
4. The settlement ground foundation reinforcing structure according to claim 1, wherein: The through end of the grouting hole (6) extends into the interior of the bearing layer (4).
5. The settlement ground foundation reinforcing structure according to claim 1, wherein: There are multiple grouting holes (6), and gaps are provided between the multiple grouting holes (6).