A foundation reinforcement structure using post-grouting high-pressure rotary jet grouting
By adopting a foundation reinforcement structure with post-gravel high-pressure rotary spray grouting in the sand pebbles, the post-gravel grouting liquid is injected with grouting pipes to form expanded piles, the problems of slow construction speed and poor pile formation effect in the existing technology are solved, and solid pile foundation and efficient construction are achieved.
Patent Information
- Application Number
- CN202421520161.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In sand and pebbles, the existing grouting method and high-pressure spin spraying method have shortcomings in construction speed and pile formation effect, resulting in difficulty in placement of grouting pipes and unsolid pile foundations.
The foundation reinforcement structure of post-gravel high-pressure rotary spray grouting is adopted. By setting up a grouting tube in the grouting body, the post-gravel grouting liquid is injected into the grouting body to form an expanded pile, which improves the structural strength of the grouting body and the bearing capacity of the sand and pebble formation.
It has achieved the formation of a solid pile foundation in the sand and pebbles formation, improved the construction speed and pile formation effect, simplified the construction process, and enhanced practicality.
Smart Images
Figure CN222715957U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pile construction, and in particular relates to a post-grouting type high-pressure rotary jet grouting foundation reinforcement structure. Background Art
[0002] In foundation reinforcement projects, grouting and high-pressure rotary jetting are both very mature processes with their own advantages and are widely used. However, in gravel and sandy strata, grouting requires mud wall protection during pre-drilling, and deep holes in gravel and sandy strata are prone to collapse after drilling, making it impossible for the grouting pipe to be placed into the specified depth of the mud wall, resulting in very slow construction speed and difficulty in placing the grouting pipe; high-pressure rotary jetting can successfully complete drilling and jetting operations, but the pile formation effect in gravel and sandy strata is not good. Therefore, a foundation reinforcement structure with post-grouting high-pressure rotary jetting is needed to form a solid pile foundation in gravel and sandy strata. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a foundation reinforcement structure of post-grouting high-pressure rotary jet grouting in view of the deficiencies in the above-mentioned prior art. The structure is simple and the design is reasonable. By arranging a grouting pipe, it is convenient to transport post-grouting liquid into the grouting body to form an enlarged pile, thereby improving the structural strength of the grouting body and the bearing capacity of the sand and gravel stratum at the same time, thereby forming a solid pile foundation in the sand and gravel stratum. By arranging auxiliary parts, it is convenient for the grouting pipe to directly pass through the limit cylinder and be smoothly inserted into the center of the grouting body, and the construction situation can be observed, which is convenient for promotion and use.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a foundation reinforcement structure of post-grouting high-pressure rotary jet grouting, characterized in that it includes a grouting body cast in a sand and gravel stratum and a grouting pipe arranged in the grouting body, and post-grouting liquid is injected into the grouting body through the grouting pipe, and an auxiliary part for limiting the grouting pipe is arranged in the foundation, and the upper part of the grouting pipe is located in the auxiliary part;
[0005] The auxiliary parts include a flat plate placed on the foundation and a limiting cylinder arranged in the foundation, the upper part of the grouting pipe is passed through the limiting cylinder, and the lower part of the grouting pipe extends into the grouting body. A sealing cylinder is arranged between the limiting cylinder and the foundation, and the sealing cylinder is sleeved on the outside of the limiting cylinder.
[0006] The above-mentioned post-grouting high-pressure rotary jet grouting foundation reinforcement structure is characterized in that the grouting body is a high-pressure rotary jet grouting body in the initial setting state.
[0007] The above-mentioned post-grouting high-pressure rotary jet grouting foundation reinforcement structure is characterized in that the length of the grouting pipe is greater than the length of the grouting body, and the bottom of the grouting pipe is flush with the bottom of the grouting body.
[0008] The above-mentioned post-grouting high-pressure rotary jet grouting foundation reinforcement structure is characterized in that the grouting pipe located in the grouting body is evenly provided with multiple overflow holes along the height direction.
[0009] The above-mentioned post-grouting high-pressure rotary jet grouting foundation reinforcement structure is characterized in that the lengths of the sealing tube and the limiting tube are not greater than the thickness of the foundation.
[0010] The above-mentioned post-grouting high-pressure rotary jet grouting foundation reinforcement structure is characterized in that the inner diameter of the limiting cylinder is adapted to the outer diameter of the grouting pipe.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] 1. The utility model is easy and quick to operate. By arranging a grouting pipe in the grouting body, the grouting body is used to play the role of mud wall protection, that is, there is no need to construct a mud wall protection, and the grouting pipe can be protected from being damaged by the gravel stratum. By arranging the grouting pipe, it is convenient to transport the post-grouting liquid into the grouting body. The primary grouting body and the post-grouting liquid of the secondary grouting will solidify into a whole to form an enlarged pile, thereby improving the structural strength of the grouting body and the bearing capacity of the gravel stratum at the same time, thereby forming a solid pile foundation in the gravel stratum, which is convenient for popularization and use.
[0013] 2. The utility model provides auxiliary parts to facilitate the grouting pipe to directly pass through the limiting cylinder and be smoothly inserted into the center of the grouting body, so that the post-grouting liquid can be evenly transported into the grouting body. The sealing cylinder is provided to facilitate sealing the gap between the limiting cylinder and the foundation to prevent the post-grouting liquid from overflowing to the upper part of the foundation, and the utility model is highly practical.
[0014] To sum up, the utility model has a simple structure and a reasonable design. By arranging a grouting pipe, it is convenient to transport the post-grouting liquid into the grouting body to form an enlarged pile, thereby improving the structural strength of the grouting body and the bearing capacity of the sand and gravel formation at the same time, thereby forming a solid pile foundation in the sand and gravel formation. By arranging auxiliary parts, it is convenient for the grouting pipe to directly pass through the limit cylinder and be smoothly inserted into the center of the grouting body, and the construction situation can be observed, which is convenient for promotion and use.
[0015] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] Figure 2 It is a structural schematic diagram of the auxiliary part of the utility model.
[0018] Description of reference numerals:
[0019] 1-foundation; 2-sand and gravel stratum; 3-grouting body;
[0020] 4- grouting pipe; 5- post-grouting liquid; 6- auxiliary parts;
[0021] 7- flat plate; 8- limiting cylinder; 9- sealing cylinder. DETAILED DESCRIPTION
[0022] like Figure 1 and Figure 2 As shown, the utility model includes a grouting body 3 cast in a sand and gravel stratum 2 and a grouting pipe 4 arranged in the grouting body 3, and a post-grouting liquid 5 is injected into the grouting body 3 through the grouting pipe 4. An auxiliary part 6 for limiting the grouting pipe 4 is arranged in the foundation 1, and the upper part of the grouting pipe 4 is located in the auxiliary part 6.
[0023] The auxiliary component 6 includes a flat plate 7 placed on the foundation 1 and a limiting cylinder 8 arranged in the foundation 1. The upper part of the grouting pipe 4 is inserted into the limiting cylinder 8, and the lower part of the grouting pipe 4 extends into the grouting body 3. A sealing cylinder 9 is arranged between the limiting cylinder 8 and the foundation 1, and the sealing cylinder 9 is sleeved on the outer side of the limiting cylinder 8.
[0024] In this embodiment, the grouting body 3 is a high-pressure rotary spray grouting body in an initial setting state.
[0025] In actual use, by setting a grouting pipe 4 in the grouting body 3, the grouting body 3 can be used to play the role of mud wall protection, that is, there is no need to construct a mud wall protection, and the grouting pipe 4 can also be protected from being damaged by the gravel formation. By setting the grouting pipe 4, it is convenient to transport the post-grouting liquid 5 into the grouting body 3. The initially set grouting body 3 and the post-grouting liquid 5 of the secondary grouting will solidify into a whole to form an enlarged pile, thereby improving the structural strength of the grouting body 3 and the bearing capacity of the gravel formation 2 at the same time, thereby forming a solid pile foundation in the gravel formation 2.
[0026] It should be noted that, by providing the auxiliary part 6, it is convenient for the grouting pipe 4 to directly pass through the limiting cylinder 8 and be smoothly inserted into the center of the grouting body 3, so that the post-grouting liquid 5 can be evenly transported into the grouting body 3. By providing the sealing cylinder 9, it is convenient to seal the gap between the limiting cylinder 8 and the foundation 1 to prevent the post-grouting liquid 5 from overflowing to the upper part of the foundation 1. By providing the flat plate 7, no obstacles will be formed on the foundation 1 to affect the construction, and it is convenient for technicians to step on the flat plate 7 and approach the grouting pipe 4 for construction operations, which is highly practical.
[0027] It should be noted that the sealing tube 9 can be selected as an elastic rubber ring, and the thickness of the elastic rubber ring is slightly larger than the gap between the limiting tube 8 and the foundation 1. By squeezing the elastic rubber ring, the gap between the limiting tube 8 and the foundation 1 can be sealed, and the auxiliary part 6 can be removed after the grouting is completed.
[0028] In this embodiment, the length of the grouting pipe 4 is greater than the length of the grouting body 3 , and the bottom of the grouting pipe 4 is flush with the bottom of the grouting body 3 .
[0029] In this embodiment, the grouting pipe 4 located in the grouting body 3 is evenly provided with a plurality of overflow holes along the height direction, so as to facilitate the post-grouting liquid 5 to diffuse from the overflow holes into the grouting body 3 and the outside of the grouting body 3 .
[0030] In actual use, by setting the bottom of the grouting pipe 4 to be flush with the bottom of the grouting body 3, the grouting pipe 4 can transport the post-grouting liquid 5 to the bottom of the grouting body 3, so that the post-grouting liquid 5 can be diffused in various positions of the grouting body 3 that need to be reinforced. By setting the length of the grouting pipe 4 to be greater than the length of the grouting body 3, the upper end of the grouting pipe 4 can pass through the limit tube 8 and extend out of the limit tube 8 according to the situation, thereby facilitating the technician to connect the grouting pipe 4 with the grouting equipment.
[0031] In this embodiment, the lengths of the sealing tube 9 and the limiting tube 8 are not greater than the thickness of the base 1 .
[0032] In this embodiment, the inner diameter of the limiting cylinder 8 is adapted to the outer diameter of the grouting pipe 4 .
[0033] During actual use, a through hole for pouring the grouting body 3 is opened in the foundation 1, and the through hole is larger than the diameter of the grouting pipe 4. By setting the inner diameter of the limiting cylinder 8 to be adapted to the outer diameter of the grouting pipe 4, the grouting pipe 4 is passed through the limiting cylinder 8 and pressed into the grouting body 3. The limiting cylinder 8 is used to limit the displacement of the upper part of the grouting pipe 4, which is equivalent to increasing the structural strength of the upper part of the grouting pipe 4 and avoiding the grouting pipe 4 from being bent.
[0034] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.
Claims
1. A foundation reinforcement structure of post-grouting high-pressure rotary jet grouting, characterized in that: It comprises a grouting body (3) cast in a sand and gravel stratum (2) and a grouting pipe (4) arranged in the grouting body (3), and a post-grouting liquid (5) is injected into the grouting body (3) through the grouting pipe (4); an auxiliary part (6) for limiting the grouting pipe (4) is arranged in the foundation (1), and the upper part of the grouting pipe (4) is located in the auxiliary part (6); The auxiliary component (6) comprises a plate (7) placed on the foundation (1) and a limiting cylinder (8) arranged in the foundation (1); the upper part of the grouting pipe (4) is inserted into the limiting cylinder (8); the lower part of the grouting pipe (4) extends into the grouting body (3); a sealing cylinder (9) is arranged between the limiting cylinder (8) and the foundation (1); and the sealing cylinder (9) is sleeved on the outer side of the limiting cylinder (8).
2. A foundation reinforcement structure of post-grouting high-pressure rotary jet grouting according to claim 1, characterized in that: The grouting body (3) is a high-pressure rotary jet grouting body in an initial setting state.
3. The foundation reinforcement structure of post-grouting high-pressure rotary jet grouting according to claim 1 is characterized in that: The length of the grouting pipe (4) is greater than the length of the grouting body (3), and the bottom of the grouting pipe (4) is flush with the bottom of the grouting body (3).
4. A foundation reinforcement structure of post-grouting high-pressure rotary jet grouting according to claim 3, characterized in that: The grouting pipe (4) located in the grouting body (3) is evenly provided with a plurality of grouting holes along the height direction.
5. The foundation reinforcement structure of post-grouting high-pressure rotary jet grouting according to claim 1 is characterized in that: The lengths of the sealing cylinder (9) and the limiting cylinder (8) are not greater than the thickness of the base (1).
6. The foundation reinforcement structure of post-grouting high-pressure rotary jet grouting according to claim 1 is characterized in that: The inner diameter of the limiting cylinder (8) is adapted to the outer diameter of the grouting pipe (4).