A foundation pit reinforcement device for high-pressure jet grouting piles
By using guide tubes and limiting rings in the high-pressure jet grouting pile foundation pit reinforcement device, the problems of cumbersome drilling and drill bit tilting are solved, achieving efficient and uniform foundation pit reinforcement, and improving work efficiency and reinforcement effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI KAIBEN BASIC ENG CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing high-pressure jet grouting pile foundation pit reinforcement process, drilling is cumbersome, time-consuming and labor-intensive, and the lack of limiting measures causes the drill bit to tilt, affecting the uniformity of cement grout diffusion and the foundation pit reinforcement effect.
A reinforcement mechanism is used to form equally spaced holes in the foundation pit soil. The high-pressure jet grouting pile drill bit is inserted vertically through the guide tube and the limiting ring, so as to achieve rapid installation and uniform distribution and avoid tilting.
It improves work efficiency, ensures uniform diffusion of cement slurry, enhances the reinforcement effect of foundation pits, and avoids the formation of weak areas.
Smart Images
Figure CN224578735U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of foundation pit reinforcement technology, and in particular relates to a foundation pit reinforcement device for high-pressure jet grouting piles. Background Technology
[0002] High-pressure jet grouting is an advanced foundation treatment and soil improvement technology, belonging to the category of chemical grouting. It utilizes high-pressure fluid to cut and mix the original soil layers, then mixes and solidifies it with injected cement grout or other chemical grouts, thereby forming a consolidated body (pile or wall) with specific shape and properties within the foundation. High-pressure jet grouting has a wide and crucial application in foundation pit engineering, especially in water-stopping and reinforcement / support, and is an effective means of solving foundation pit problems in complex strata (such as water-rich sand layers and soft soil layers).
[0003] A search revealed a foundation pit reinforcement structure based on high-pressure jet grouting piles, with publication number CN213741101U, published on the Chinese Patent website. This foundation pit reinforcement structure connects the first connecting block and the second connecting block between adjacent steel cages under the action of the fixing components, increasing the connection strength between adjacent high-pressure jet grouting piles and achieving the effect of reinforcing the foundation pit. However, there are some defects and deficiencies that need to be improved: (1) When using high-pressure jet grouting piles for foundation pit reinforcement, it is usually necessary to evenly bury multiple high-pressure jet grouting piles in the area to be reinforced at the bottom of the foundation pit. Before burying, it is often necessary to... First, several equally spaced holes must be drilled using measuring tools at specified intervals, and then the drilling tool of the high-pressure jet grouting pile must be embedded in the corresponding holes. The whole process is cumbersome and inconvenient, time-consuming and labor-intensive, thus reducing the overall work efficiency; (2) When the high-pressure jet grouting pile is embedded in the foundation pit soil, there is often a lack of effective limiting measures, which makes the drilling tool of the high-pressure jet grouting pile prone to tilting in deep holes or complex foundation pit soil, resulting in the cement grout being difficult to spread evenly to the surrounding adjacent piles after being injected into the foundation pit soil. This causes the adjacent piles to form weak areas due to poor overlap, which in turn affects the foundation pit reinforcement effect. Therefore, in view of the above problems, the foundation pit reinforcement device of the high-pressure jet grouting pile provided by this utility model is of great significance. Utility Model Content
[0004] This utility model provides a foundation pit reinforcement device for high-pressure jet grouting piles. The reinforcement mechanism automatically forms several equally spaced holes in the foundation pit soil. When the high-pressure jet grouting pile drill bit extends into the foundation pit soil, cement grout can be injected through each equally spaced hole. This eliminates the need for drilling with measuring tools, allowing multiple high-pressure jet grouting pile drill bits to be quickly embedded in the foundation pit soil and evenly distributed in a linear, equidistant manner. The entire process is more convenient, faster, and saves time and effort, thus greatly improving overall work efficiency. A limiting ring can be fitted onto the outside of the high-pressure jet grouting pile drill bit to limit its movement, ensuring that the drill bit extends vertically into the foundation pit soil. This prevents tilting, which could hinder the even diffusion of cement grout to adjacent piles after injection, leading to weak areas due to poor overlap and affecting the foundation pit reinforcement effect. In summary, this invention solves the problems in the background technology.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model discloses a foundation pit reinforcement device for high-pressure jet grouting piles, which includes a foundation pit and a reinforcement mechanism installed in the foundation pit.
[0007] The reinforcement mechanism includes a base plate, with several guide cylinders fixedly connected to the bottom of the base plate. The guide cylinders are circular, and each guide cylinder has a guide opening at its top end where it connects to the base plate. Several fixing seats are fixedly connected to the top of the base plate, with the number of fixing seats being the same as that of the guide cylinders. A limiting groove is formed on the top of the fixing seat. The limiting groove is circular, with a through hole at the center of its bottom. A limiting ring is provided inside the limiting groove. Several connecting blocks are fixedly connected between the outer wall of the limiting ring and the inner wall of the limiting groove. A high-pressure jet grouting pile drill bit is inserted into the through hole.
[0008] Furthermore, the guide cylinders are equidistantly linearly distributed along the length of the base plate, and the through holes and guide openings are all circular with corresponding equal diameters, and the center of each through hole corresponds one-to-one with the center of each guide opening.
[0009] Furthermore, each of the guide cylinders has a protrusion fixedly connected to its bottom outer wall. The protrusion is annular, with its sidewalls being inclined end faces, and the outer diameter of the top end of the protrusion is larger than the outer diameter of its bottom end.
[0010] Furthermore, each of the guide cylinders has several reinforcing ribs fixedly connected to its outer wall. The reinforcing ribs are elongated strips with arc-shaped end faces, and each of the reinforcing ribs is distributed in an equidistant ring along the circumference of the guide cylinder.
[0011] Furthermore, the inner diameter of the limiting ring is equal to the diameter of the through hole, and the limiting ring is located directly above the through hole.
[0012] Furthermore, the inner wall of the limiting ring is provided with a buffer ring, the outer diameter of which is equal to the inner diameter of the limiting ring.
[0013] The present invention has the following advantages over the prior art:
[0014] (1) When the high-pressure jet grouting pile foundation pit reinforcement device of this utility model is used, the reinforcement mechanism can automatically form several equally spaced holes in the foundation pit soil so that when the high-pressure jet grouting pile drill bit extends into the foundation pit soil, cement grout can be injected through each equally spaced hole. At this time, there is no need to use measuring tools to drill holes, and multiple high-pressure jet grouting pile drill bits can be quickly buried in the foundation pit soil and evenly distributed in an equidistant linear manner. The whole process is more convenient and faster, saving time and effort, thereby greatly improving the overall work efficiency.
[0015] (2) When using the high-pressure jet grouting pile foundation pit reinforcement device of this utility model, the limiting ring can be sleeved on the outside of the high-pressure jet grouting pile drill bit to play a limiting role, thereby ensuring that the high-pressure jet grouting pile drill bit extends vertically into the foundation pit soil, so as to avoid it tilting and causing the cement grout to be difficult to spread evenly to the surrounding adjacent piles after being injected into the foundation pit soil, resulting in the adjacent piles forming a weak area due to poor overlap, which in turn affects the effect of foundation pit reinforcement.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a structural schematic diagram of a high-pressure jet grouting pile foundation pit reinforcement device according to the present invention;
[0019] Figure 2 This is a schematic diagram of the reinforcement mechanism in this utility model;
[0020] Figure 3 This is a front sectional view of the reinforcing mechanism in this utility model;
[0021] Figure 4 This is a schematic diagram of the guide cylinder in this utility model;
[0022] Figure 5This is a schematic diagram of the structure of the fixing base in this utility model;
[0023] Figure 6 This is a top view of the fixing base in this utility model;
[0024] Figure 7 This is a schematic diagram of the limiting ring in this utility model;
[0025] Figure 8 This is a top view of the limiting ring in this utility model.
[0026] The attached diagram lists the components represented by each number as follows:
[0027] 1. Excavation pit; 2. Base plate; 3. Guide tube; 4. Guide opening; 5. Fixing seat; 6. Limiting groove; 7. Through hole; 8. Limiting ring; 9. Connecting block; 10. High-pressure jet grouting pile drilling tool; 11. Protrusion; 12. Reinforcing rib; 13. Buffer ring. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0029] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] Please see Figure 1-8 As shown, the present invention provides a foundation pit reinforcement device for high-pressure jet grouting piles, including a foundation pit 1, in which a reinforcement mechanism is provided;
[0031] The reinforcement mechanism includes a base plate 2, with several guide cylinders 3 fixedly connected to the bottom of the base plate 2. Each guide cylinder 3 is circular, and a guide opening 4 is provided at the connection point between its top and the base plate 2. When the base plate 2 is placed at the bottom of the pit 1 in the area requiring reinforcement and downward pressure is applied, each guide cylinder 3 can be inserted into the soil of the pit 1 until the bottom surface of the base plate 2 adheres to the surface of the pit 1. Several fixing seats 5 are fixedly connected to the top of the base plate 2, the number of which is the same as the number of guide cylinders 3. Limiting grooves 6 are provided on the top of each fixing seat for limiting movement. The groove 6 is circular, with a through hole 7 at the center of its bottom. A limiting ring 8 is installed inside the limiting groove 6. Several connecting blocks 9 are fixedly connected between the outer wall of the limiting ring 8 and the inner wall of the limiting groove 6. A high-pressure jet grouting drill bit 10 is inserted into the through hole 7. After the high-pressure jet grouting drill bit 10 is inserted into the through hole 7, it can extend along the guide tube 3 into the soil of the foundation pit 1. At this time, cement grout can be injected into the soil of the foundation pit 1 through multiple high-pressure jet grouting drill bits 10. After the cement grout solidifies, it can overlap with each other to form adjacent piles, thereby reinforcing the foundation pit 1.
[0032] The guide cylinder 3 is equidistantly linearly distributed along the length of the base plate 2. The through holes 7 and guide openings 4 are both circular with equal diameters. The center of each through hole 7 corresponds one-to-one with the center of each guide opening 4. When the guide cylinder 3 is inserted into the soil of the foundation pit 1, it can automatically form several equally spaced holes in the soil of the foundation pit 1. When the high-pressure jet grouting pile drill 10 extends into the soil of the foundation pit 1, cement grout can be injected through the equally spaced holes left on the surface of the soil of the foundation pit 1 by each guide cylinder 3. At this time, there is no need to use measuring tools to drill holes, and multiple high-pressure jet grouting pile drills 10 can be quickly buried in the soil of the foundation pit 1 and evenly distributed in an equidistant linear manner. The whole process is more convenient and faster, saving time and effort, thereby greatly improving the overall work efficiency.
[0033] Each guide cylinder 3 has a protrusion 11 fixedly connected to its bottom outer wall. The protrusion 11 is annular with an inclined end face on its side wall. The outer diameter of the top of the protrusion 11 is larger than the outer diameter of its bottom. When the guide cylinder 3 is inserted into the soil of the foundation pit 1, the soil can be guided around along the inclined end face of the side wall of the protrusion 11 to prevent the soil from accumulating directly below the guide cylinder 3 and preventing its insertion. This allows each guide cylinder 3 to be inserted into the soil of the foundation pit 1 more quickly.
[0034] Each guide cylinder 3 has several reinforcing ribs 12 fixedly connected to its outer wall. The reinforcing ribs 12 are long strips with arc-shaped ends. Each reinforcing rib 12 is distributed in an equidistant ring along the circumference of the guide cylinder 3. The multiple reinforcing ribs 12 can support and reinforce the cylinder wall of the guide cylinder 3, thereby improving the structural strength of the guide cylinder 3 and preventing it from bending and deforming under stress.
[0035] The inner diameter of the limiting ring 8 is equal to the diameter of the through hole 7, and the limiting ring 8 is located directly above the through hole 7. When the high-pressure jet grouting drill bit 10 is inserted into the through hole 7 and extends along the guide tube 3 into the soil of the foundation pit 1, the limiting ring 8 can be sleeved on the outside of the high-pressure jet grouting drill bit 10 to limit its movement. This ensures that the high-pressure jet grouting drill bit 10 extends vertically into the soil of the foundation pit 1, so as to avoid it tilting and causing the cement grout to be difficult to spread evenly to the surrounding adjacent piles after being injected into the soil of the foundation pit 1. This would result in the adjacent piles forming weak areas due to poor overlap, which would then affect the reinforcement effect of the foundation pit 1.
[0036] The inner wall of the limiting ring 8 is provided with a buffer ring 13. The outer diameter of the buffer ring 13 is equal to the inner diameter of the limiting ring 8. The buffer ring 13 can be made of elastic materials such as rubber and is fixed by adhesives. The buffer ring 13 can play a buffering and protective role to avoid collision and wear between the high-pressure jet grouting pile drill tool 10 and the inner wall of the limiting ring 8 due to direct contact.
[0037] All standard parts used in the application documents can be purchased from the market. All components in this application documents can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art.
[0038] The working principle of this utility model is as follows:
[0039] In use, the base plate 2 can be placed at the bottom of the foundation pit 1 in the area requiring reinforcement and pressure applied downwards to insert the guide cylinders 3 into the soil of the foundation pit 1 until the bottom surface of the base plate 2 is in contact with the surface of the foundation pit 1. After the guide cylinders 3 are inserted into the soil of the foundation pit 1, several equally spaced holes can be automatically formed in the soil of the foundation pit 1. Then, the high-pressure jet grouting drill 10 is inserted into each through hole 7 and extended along the corresponding guide cylinder 3 into the soil of the foundation pit 1. Afterwards, cement grout can be injected into the soil of the foundation pit 1 through multiple high-pressure jet grouting drill 10s. After the cement grout solidifies, they can overlap and form adjacent piles to reinforce the foundation pit 1. When the high-pressure jet grouting drill 10 extends into the soil of the foundation pit 1, the equally spaced holes left on the surface of the soil of the foundation pit 1 by each guide cylinder 3 can be used to reinforce the foundation pit 1. The high-pressure jet grouting drill bit 10 is quickly embedded in the soil of the foundation pit 1 without the need for drilling with measuring tools. It is evenly distributed in a linear and equidistant manner, making the whole process more convenient, faster, and more labor-saving, thus greatly improving the overall work efficiency. When the high-pressure jet grouting drill bit 10 is inserted into the through hole 7 and extends along the guide tube 3 into the soil of the foundation pit 1, the limiting ring 8 can be sleeved on the outside of the high-pressure jet grouting drill bit 10 to limit its movement. This ensures that the high-pressure jet grouting drill bit 10 extends vertically into the soil of the foundation pit 1, preventing it from tilting and causing the cement grout to be difficult to spread evenly to the surrounding adjacent piles after being injected into the soil of the foundation pit 1. This would result in weak areas formed by poor overlap of the adjacent piles, which would then affect the reinforcement effect of the foundation pit 1.
[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A foundation pit reinforcement device of a high-pressure jet grouting pile, characterized in that, Includes a foundation pit, in which a reinforcement mechanism is installed; The reinforcement mechanism includes a base plate, with several guide cylinders fixedly connected to the bottom of the base plate. The guide cylinders are circular, and each guide cylinder has a guide opening at its top end where it connects to the base plate. Several fixing seats are fixedly connected to the top of the base plate, with the number of fixing seats being the same as that of the guide cylinders. A limiting groove is formed on the top of the fixing seat. The limiting groove is circular, with a through hole at the center of its bottom. A limiting ring is provided inside the limiting groove. Several connecting blocks are fixedly connected between the outer wall of the limiting ring and the inner wall of the limiting groove. A high-pressure jet grouting pile drill bit is inserted into the through hole.
2. The foundation pit reinforcing device of high-pressure jet grouting pile according to claim 1, characterized in that, The guide cylinders are equidistantly linearly distributed along the length of the base plate. The through holes and guide openings are all circular with equal diameters, and the center of each through hole corresponds one-to-one with the center of each guide opening.
3. The foundation pit reinforcing device of high-pressure jet grouting pile according to claim 1, characterized in that, Each of the guide cylinders has a protrusion fixedly connected to its bottom outer wall. The protrusion is annular, with its sidewalls being inclined end faces, and the outer diameter of the top of the protrusion is larger than the outer diameter of its bottom.
4. The foundation pit reinforcing device of high-pressure jet grouting pile according to claim 1, characterized in that, Each of the guide cylinders has several reinforcing ribs fixedly connected to its outer wall. The reinforcing ribs are long strips with arc-shaped end faces, and each of the reinforcing ribs is distributed in an equidistant ring along the circumference of the guide cylinder.
5. The foundation pit reinforcing device of high-pressure jet grouting pile according to claim 1, characterized in that, The inner diameter of the limiting ring is equal to the diameter of the through hole, and the limiting ring is located directly above the through hole.
6. The foundation pit reinforcing device of high-pressure jet grouting pile according to claim 1, characterized in that, The inner wall of the limiting ring is provided with a buffer ring, and the outer diameter of the buffer ring is equal to the inner diameter of the limiting ring.