A double-layer capsule for underground grouting deviation correction
Patent Information
- Application Number
- CN202522355601.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-06
AI Technical Summary
采用单层囊体进行注浆纠偏时，结构可靠性差：单层囊体在高压注浆时易破裂，且缺乏密封保障，浆液渗漏风险高
本实用新型的双层囊体结构简洁，性能可靠，增强了注浆管与密封内囊之间的连接强度和密封有效性，提升了整体防渗漏性能，提高了密封内囊在高压注浆时的抗形变性能，最高可耐压2.5Mpa,可有效防止内囊在高压注浆时发生破裂等情况，提高了使用稳定性；可广泛应用于隧道纠偏、基坑抬升、桥梁基础加固等场景，具备显著的经济与社会效益。
Smart Images
Figure CN224784885U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underground engineering grouting technology, specifically to a double-layered capsule for underground grouting correction. Background Technology
[0002] In underground engineering projects such as tunnels, foundation pits, and subways, controlling ground deformation is a core challenge to ensure construction safety and the stability of surrounding structures. When using single-layer bladders for grouting correction, structural reliability is poor: single-layer bladders are prone to rupture under high-pressure grouting and lack sealing protection, resulting in a high risk of grout leakage. Utility Model Content
[0003] This utility model provides a double-layered capsule for underground grouting correction, the specific technical solution of which is as follows: A double-layered capsule for underground grouting correction, comprising: The sealed inner bladder (2) is made of thermoplastic ultra-high molecular weight material through a hot-melt process; The grouting pipe (3) penetrates the sealed inner bladder (2) and is divided into an inner tube (31), an outer tube at the top of the bladder (32), and an outer tube at the bottom of the bladder (33). The outer constraint layer (1) encloses the inner sealing bladder (2) and has a higher resistance to expansion than the inner sealing bladder (2). The inner tube (31) of the bladder is provided with multiple sets of grouting holes (4) arranged at intervals along the axial direction. Each set contains at least two grouting holes evenly distributed in the circumferential direction, and the distance between adjacent sets gradually increases from the top of the bladder to the bottom of the bladder.
[0004] Furthermore, the spacing between adjacent groups of multiple grouting holes (4) is 50 mm at the top of the bladder and 200 mm at the bottom of the bladder.
[0005] Furthermore, the portion of the constraint outer layer (1) located on the periphery of the sealed inner bladder (2) is a grid formed by multiple flat strips in a warp and weft weave structure. One part of the flat strips serves as the warp (11), and the other part serves as the weft (12). The intersection of the warp and weft (14) is fixed together by sewing. The portion of the constraint outer layer (1) located at the top and bottom of the sealed inner bladder (2) is formed by the extension and overlap of the flat strips that constitute the periphery of the constraint outer layer and serve as the warp. The flat strips at the top or bottom of the bladder are grouped into two pairs. The two flat strips in each group cross at the center of the top or bottom of the bladder to form a winding opening. The winding opening allows the grouting pipe (3) to pass through. The two flat strips in each group are respectively attached to the outer tube body (32) at the top of the bladder or the outer tube body (33) at the bottom of the bladder at the winding opening. The two flat strips cross and overlap each other but are not fixed together at the winding opening and the periphery.
[0006] Furthermore, the mesh size is between 10×10mm and 20×20mm.
[0007] The beneficial effects of this utility model are: This invention features a simple and reliable double-layered bladder structure. It enhances the connection strength and sealing effectiveness between the grouting pipe and the sealing inner bladder, improving overall leak-proof performance and the deformation resistance of the sealing inner bladder during high-pressure grouting. It can withstand pressures up to 2.5 MPa, effectively preventing rupture of the inner bladder during high-pressure grouting and improving its stability. It can be widely used in tunnel correction, foundation pit lifting, bridge foundation reinforcement, and other scenarios, offering significant economic and social benefits. Attached Figure Description
[0008] Figure 1 This is a cross-sectional schematic diagram of the double-layered capsule of this utility model in an expanded state; Figure 2 This is a frontal view of the double-layered cyst in its inflated state. Figure 3 This is a schematic diagram of the structure at the bottom of the double-layered cyst in an inflated state. Detailed Implementation
[0009] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0010] like Figure 1 As shown, this utility model provides a double-layered capsule for underground grouting correction, comprising: The inner sealing bladder 2 is made of thermoplastic ultra-high molecular weight sealing material and manufactured through a hot-melt process; Grouting pipe 3, which is made of stainless steel, has a sealing passage through the sealing inner bladder 2 and forms: The tubular portion located within the inner cavity of the sealed inner bladder 2 is defined as the inner bladder tubular portion 31. The tube portion that extends out of the top wall of the sealed inner bladder 2 and is located outside the sealed inner bladder is defined as the outer tube portion 32 of the bladder top; The tube portion that extends out of the bottom wall of the sealed inner bladder 2 and is located outside the sealed inner bladder is defined as the outer tube portion 33 of the bladder bottom; The inner tube 31 of the bladder has multiple sets of grouting holes 4 that connect the inner tube to the inner cavity of the sealed inner bladder 2. Each set of grouting holes includes at least two grouting holes 4 that are evenly distributed around the circumference of the inner tube 31. The multiple sets of grouting holes 4 are arranged sequentially at intervals along the axial direction of the inner tube 31, and the spacing between adjacent sets of grouting holes 4 gradually increases from the top of the bladder to the bottom of the bladder, so as to achieve uniformity and controllability of grout diffusion. Preferably, the spacing between two adjacent sets of grouting holes 4 near the top of the bladder is 50 mm, and the spacing between two adjacent sets of grouting holes 4 near the bottom of the bladder is 200 mm.
[0011] Preferably, the inner diameter of the grouting pipe 3 is 2.54 cm; Furthermore, the grouting pipe 3 and the sealing inner bladder 2 are sealed at the top and bottom of the bladder by sealing components 5. The sealing components can be stainless steel flanges, and can also be used with sealing rubber rings to enhance the sealing effect. The specific combination structure is existing technology and will not be described in detail here.
[0012] It also includes a restraining outer layer 1, which is a flat strip made of ultra-high molecular weight material woven into warp and weft. The restraining outer layer 1 wraps around the sealing inner bladder 2. The two can be connected by sewing or gluing, or they can be separated. Due to the composition and weaving structure of the restraining outer layer 1, its anti-expansion performance is higher than that of the sealing inner bladder 2, thereby restraining it and preventing it from bursting during the grouting process inside the sealing inner bladder 2. Preferably, the restraining outer layer 1 has a grid-like arrangement of mesh holes 13. The size of the mesh holes 13 is set according to the required burial depth of the double-layer bladder. If the double-layer bladder needs to be buried in a shallow layer, the mesh hole size can be set to 10×10mm, and for a deeper layer, it can be set to 20×20mm.
[0013] Preferred, such as Figure 2 As shown, the outer constraint layer 1 located on the periphery of the sealed inner bladder 2 is a mesh-like structure formed by warp and weft weaving, with one part serving as warp 11 and the other part serving as weft 12. The intersection of warp and weft 14 is fixed together by sewing.
[0014] Furthermore, such as Figure 2 As shown, the portion of the outer constraint layer 1 located at the top and bottom of the inner sealing bladder 2 is composed of flat strips extending and overlapping, which form the periphery of the outer constraint layer and act as warp threads. Two flat strips at the top or bottom of the bladder form a group, and the two flat strips in each group cross at the center of the top or bottom of the bladder to form a winding opening. This winding opening allows the outer tube body 32 at the top of the bladder or the outer tube body 33 at the bottom of the grouting pipe 3 to pass through. The two flat strips in each group abut against the sides of the outer tube body 32 at the top of the bladder or the outer tube body 33 at the winding opening. The two flat strips overlap but are not fixedly connected between the winding opening and the periphery. Figure 3 As shown, taking the bottom of the bladder as an example, there are two sets of flat bands acting as warp lines in this example. One set consists of 11a and 11b, and the other set consists of 11c and 11d. Taking 11a and 11b as examples, the two flat bands intersect at the center of the bladder bottom to form a winding opening. The winding opening allows the outer tube 33 of the grouting pipe 3 to pass through. The two flat bands (11a and 11b) abut against the two sides of the outer tube 33 of the bladder bottom at the winding opening. The two flat bands also form two symmetrical, overlapping cross structures centered on the winding opening (e.g., Figure 3(As shown in A and B in the diagram). This layout structure not only achieves the constraint of the sealed inner bladder 2, but also enhances the connection strength and sealing effectiveness between the outer tube 32 at the top of the bladder or the outer tube 33 at the bottom of the bladder and the sealed inner bladder 2. Furthermore, since the flat bands at the bottom and top of the bladder are not fixed to each other, the winding and constraint force on the outer tube 32 at the top of the bladder or the outer tube 33 at the bottom of the bladder can be adaptively adjusted as the sealed inner bladder 2 expands. This means that the enhancement effect on the connection strength and sealing effectiveness between the outer tube 32 at the top of the bladder or the outer tube 33 at the bottom of the bladder and the sealed inner bladder 2 can be adaptively enhanced. The structure is simple but the effect is very good.
[0015] It should be noted that, Figures 1 to 3 The diagram shows the grouting expansion state of the sealed inner bladder 2 of the double-layered bladder after grouting. Before grouting, the sealed inner bladder 2 and the restraining outer layer 1 can be rolled up on the grouting pipe 3, similar to the rolled-up fabric of a folded umbrella. This state is defined as the folded state of the double-layered bladder, where the volume of the double-layered bladder is minimized for transportation and underground burial. Furthermore, tape can be used to maintain the folded cylindrical shape, and finally, a layer of woven fabric is wrapped around the outside of the cylinder as a protective layer.
[0016] This invention uses a double-layered bladder to grout and expand, causing controllable displacement of the soil, which in turn drives or influences underground structures to correct their deviation.
[0017] The number of double-layered bladders can be multiple, and the grouting pipes 3 of the multiple double-layered bladders can be a series structure connected end to end; or a parallel structure in which the grouting pipes 3 of the multiple double-layered bladders are each connected to the grouting pump 14; or a hybrid structure in which parallel and series connections coexist. Of course, regardless of the above structure, the end of the grouting pipe 3 of the last double-layered bladder should be sealed with a sealing device (not shown in the figure) to prevent grout from overflowing from the double-layered bladder, which should be known to those skilled in the art.
[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A double-layered capsule for underground grouting correction, characterized in that, include: The sealed inner bladder (2) is made of thermoplastic ultra-high molecular weight material through a hot-melt process; The grouting pipe (3) penetrates the sealed inner bladder (2) and is divided into an inner tube (31), an outer tube at the top of the bladder (32), and an outer tube at the bottom of the bladder (33). The outer constraint layer (1) encloses the inner sealing bladder (2) and has a higher resistance to expansion than the inner sealing bladder (2). The inner tube (31) of the bladder is provided with multiple sets of grouting holes (4) arranged at intervals along the axial direction. Each set contains at least two grouting holes evenly distributed in the circumferential direction, and the distance between adjacent sets gradually increases from the top of the bladder to the bottom of the bladder.
2. The double-layered capsule for underground grouting correction according to claim 1, characterized in that: The spacing between adjacent groups of multiple grouting holes (4) is 50 mm at the top of the bladder and 200 mm at the bottom of the bladder.
3. A double-layered capsule for underground grouting correction according to claim 1, characterized in that: The outer restraint layer (1) located around the sealed inner bladder (2) consists of multiple flat strips forming a grid with a warp and weft weave structure. One part of the flat strips serves as the warp (11), and the other part serves as the weft (12). The intersection of the warp and weft (14) is fixed together by sewing. The outer restraint layer (1) located at the top and bottom of the sealed inner bladder (2) consists of flat strips that form the periphery of the outer restraint layer and act as the warp, which extend and overlap. The flat strips at the top or bottom of the bladder are grouped into two sets. The two flat strips in each set cross at the center of the top or bottom of the bladder to form a winding opening. The winding opening allows the grouting pipe (3) to pass through. The two flat strips in each set abut against the outer tube body (32) at the top of the bladder or the outer tube body (33) at the bottom of the bladder at the winding opening. The two flat strips cross and overlap each other but are not fixed together at the winding opening and periphery.
4. A double-layered capsule for underground grouting correction according to claim 3, characterized in that: The mesh size is between 10×10mm and 20×20mm.