Cloth bag pile and high polymer grouting combined floor deep foundation reinforcing structure

Abstract

The utility model relates to a cloth bag pile combined high polymer grouting terrace deep foundation reinforcing structure which comprises a high polymer cloth bag pile and a high polymer grouting body, the high polymer cloth bag pile is arranged in a foundation and penetrates into a soft soil layer to a bearing stratum, the high polymer cloth bag pile is composed of an external cloth bag and high polymer grouted in the cloth bag, and the high polymer grouting body is arranged in the high polymer cloth bag pile. And the high polymer grouting body is arranged in the foundation and is connected with the high polymer in the high polymer cloth bag pile to form an integral structure. The utility model has the advantages that: 1) the soft foundation soil with a certain depth in the limited operation space of the existing storage building is reinforced, the bearing capacity characteristic value of the foundation soil is improved, and the post-construction deformation effect is controlled; the construction method has the advantages of achieving rapid minimally invasive repair of floor diseases, achieving a certain lifting effect on the repaired and reinforced floor, enabling the grouting layer, the cloth bag piles, original foundation soil and the floor to form a new stress system, hardly damaging the original floor, reducing the construction difficulty, greatly saving the construction period and the maintenance cost, and meanwhile meeting the requirement for environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of building foundation reinforcement technology, and in particular to a deep foundation reinforcement structure for a bag pile combined with polymer grouting floor. Background Technology

[0002] With economic development and rising living standards, my country's logistics demand is constantly increasing. The explosive growth of e-commerce has further boosted the demand for express delivery and warehousing. In particular, the construction of logistics warehouses in the Pearl River Delta, Yangtze River Delta, and Bohai Rim economic zones is accelerating. A large number of existing ordinary logistics warehouses have flooring that has been damaged to varying degrees due to subsidence and can no longer meet the market demand for intelligent, high-standard logistics warehouses. The demand gap for high-standard warehouses is about 100 million square meters. Therefore, the upgrading and renovation of ordinary logistics warehouses and the repair of their flooring are urgently needed.

[0003] Limited land supply is a major factor restricting the development of high-standard warehouses. Therefore, the renovation and upgrading of traditional logistics warehouses has become the primary target for addressing the demand gap for high-standard warehouses. Most existing logistics warehouses are located in areas with complex topography and geological conditions, such as open streams and hidden ponds, and areas with poor soil layers. Due to inconsistent design standards and requirements, the warehouse floors suffer from varying degrees of cracking, voids, misalignment, and water seepage during use due to uneven settlement of the soft soil layers. These problems have uncontrollable impacts on the use of the warehouses and may even pose safety hazards.

[0004] To mitigate the hazards caused by uneven settlement in soft soil foundations, various methods are commonly employed before the construction of warehouse buildings, including replacement, preloading, compaction, grouting reinforcement, micropiles, and composite foundations, to treat the soft soil foundation and meet design requirements. Due to changes in design, construction, the intended use of existing buildings, and the surrounding environment, my country urgently needs to reinforce and upgrade the foundations of existing warehouse buildings across a wide area, involving substantial engineering work. A common method for reinforcing the foundations of existing warehouse buildings is pile foundation replacement, which includes techniques such as jet grouting, anchored static pressure piles, and micropiles, depending on the building's characteristics. However, these methods are constrained by limitations such as limited internal height and working space, short construction periods, limited maintenance and reinforcement costs, and stringent requirements regarding vibration and noise control. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by providing a deep foundation reinforcement structure for a floor slab using a combination of polymer bag piles and polymer grouting. This structure reinforces deep soil layers and repairs issues such as floor cracking and voids, effectively achieving the reinforcement of building floor foundations.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A deep foundation reinforcement structure combining a bag pile and a polymer grouting floor is characterized by comprising a polymer bag pile and a polymer grouting body, wherein the polymer bag pile is arranged in the foundation and extends into the weak soil layer up to the bearing layer, and is composed of an outer bag and polymer grouting inside the bag, and the polymer grouting body is disposed in the foundation and is integrated with the polymer inside the polymer bag pile to form an integral structure.

[0008] The polymer bag piles are arranged in a quincunx pattern within the repair and reinforcement area of ​​the foundation; the grouting holes of the polymer grouting bodies are arranged in a quincunx pattern.

[0009] The polymer is injected into the cloth bag through a grouting pipe.

[0010] The grouting pipe is left inside the cloth bag after grouting is completed.

[0011] The advantages of this utility model are:

[0012] 1) To reinforce the soft soil foundation at a certain depth within the limited working space of existing warehouse buildings, improve the characteristic value of the bearing capacity of the foundation soil, and control the deformation effect after construction.

[0013] 2) It enables rapid and minimally invasive repair of floor defects and has a certain lifting effect on the repaired and reinforced floor. The grouting layer, bag piles, and original foundation soil and floor form a new stress system.

[0014] 3) Compared with traditional solutions such as pile foundation replacement, it requires almost no damage to the original ground, reduces construction difficulty, greatly saves construction time and maintenance costs, and meets the requirements of green environmental protection. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the arrangement of the bag piles and grouting holes in this utility model;

[0017] Figure 3 This is a cross-sectional view of the original natural foundation during the application test of this utility model. Detailed Implementation

[0018] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0019] like Figure 1-3As shown in the figure, labels 1-17 represent: 1. New leveling layer, 2. Original ground, 3. Crushed stone cushion layer, 4. Fill layer, 5. Soft soil layer, 6. Bearing layer, 7. Polymer grouting pipe, 8. Polymer bag pile, 9. Polymer grouting hole, 10. Polymer grouting filling layer, 11. Bag pile grouting head, 12. Repair and reinforcement area, 13. Original building ground, 14. Graded crushed stone layer, 15. Fill layer, 16. Soft soil layer, 17. Bearing layer.

[0020] Example: Combining Figures 1 to 3 As shown, the bag pile combined with polymer grouting floor deep foundation reinforcement structure in this embodiment is used for... Figure 3 The building floor shown is being reinforced, which includes the original building floor 13, graded crushed stone layer 14, fill layer 15, soft soil layer 16, and bearing layer 17 arranged sequentially from shallow to deep along the stratum depth direction. Figure 1 The floor structure shown is Figure 3 The ground structure shown is the same, which includes the original ground 2, crushed stone cushion layer 3, fill layer 4, soft soil layer 5, and bearing layer 6.

[0021] The original foundation of this type of building was a natural foundation. The backfill soil layer was compacted and consolidated, and then covered with a 50mm thick layer of graded crushed stone. The original floor thickness was 200mm, and the settlement was approximately 300-500mm. After about 6 years of use, a new leveled floor was poured and reinforced twice, but some cracks, hollow areas, and misalignments still exist. Even after repairs, the settlement is still 100-200mm, affecting the normal use of the floor. The clear height of the working space inside the warehouse is less than 9m, and the pipeline distribution on the warehouse roof is complex. The warehouse door is 4.5m × 4.5m, making it impossible for conventional pile foundations and other mechanical equipment to be used inside the warehouse.

[0022] This embodiment specifically includes the following usage methods:

[0023] 1) The warehouse is constructed in sections. The shelves and other items in the construction section are cleared out, and the original building floor 13 is cleaned.

[0024] 2) Ground-penetrating radar and supplementary surveys were used to detect and diagnose defects and obtain soil parameters and settlement consolidation status. Based on the diagnostic results, the consolidation state and parameters of the foundation soil after settlement deformation were determined. In accordance with the "Technical Specification for Building Foundation Treatment" (JGJ79-2012) and the "Code for Design of Building Foundations" (GB50007-2011), and considering post-construction service loads and settlement control standards, the length, spacing, diameter, and grouting volume of the polymer bag piles were designed. Simultaneously, based on the diagnostic results of ground settlement cracking, hollow areas, and misalignment, the spacing, depth, and grouting pressure control parameters for polymer grouting were designed.

[0025] 3) Locate the points of the polymer bag piles 8, drill holes in the original building floor to form grouting heads 11 for the bag piles, and use grouting equipment to inject polymer into the bag through the polymer grouting pipe 7. After grouting is completed, check the grouting effect and seal the holes. Repeat this process to complete the polymer bag piles 8. Within the repair and reinforcement area 12, the points of the polymer bag piles 8 are arranged in a quincunx pattern.

[0026] In this embodiment, after grouting is completed, the grouting pipe or PVC pipe, which serves as the polymer grouting pipe 7, can be left inside the bag pile to achieve the effect of reinforcing the pile.

[0027] 4) Drill holes and locate polymer grouting holes 9 on the original ground surface. Use grouting pipes to fill and inject grout into cracked, hollow, misaligned, and other damaged areas to form a polymer grouting filling layer 10. After grouting is completed, check the grouting effect and seal the holes. Repeat this process to complete the polymer grouting. Within the repaired and reinforced ground surface area 12, the locations of the polymer grouting holes 9 are arranged in a quincunx pattern and connected with the polymer inside the polymer bag piles 8 to form a whole. Through the reinforced bag piles combined with the polymer grouting layer, a new composite force system is formed with the original foundation soil and ground surface.

[0028] 5) Conduct comprehensive radar and core drilling tests and inspections on the polymer bag piles 8 and the polymer grouting layer 10 in accordance with the design requirements.

[0029] 6) After passing the inspection, according to the design elevation of the building floor, roughen the original building floor surface and pour a new leveling layer 1 to complete the foundation reinforcement and repair work of the building floor to be repaired.

[0030] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A deep foundation reinforcement structure combining bag piles and polymer grouting floor, characterized in that: The polymer bag pile and the polymer grouting body, wherein the polymer bag pile is arranged in the foundation and extends into the soft soil layer to the bearing layer, which is composed of the outer bag and the polymer grouted in the bag, and the polymer grouting body is arranged in the foundation and is integrated with the polymer in the polymer bag pile.

2. The cloth bag pile combined with high polymer grouting terrace deep foundation reinforcing structure according to claim 1, characterized in that: A plurality of the polymer bag piles are arranged in the repair and reinforcement range of the foundation in a quincunx pattern; and a plurality of the grouting holes of the polymer grouting body are arranged in a quincunx pattern.

3. The cloth bag pile combined with high polymer grouting terrace deep foundation reinforcing structure according to claim 1, characterized in that: The polymer is injected into the bag through a grouting pipe.

4. The cloth bag pile combined with high polymer grouting terrace deep foundation reinforcing structure according to claim 3, characterized in that: The grouting pipe is left in the bag after grouting is completed.

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