A foundation treatment structure for sand and gravel strata
By setting up grouting pipes in the sand and pebbles formation and combining with the design of auxiliary parts, the problem of difficult to form a solid pile foundation in the sand and pebbles formation is solved, and efficient pile foundation formation and re-treatment of the sand and pebbles formation is achieved.
Patent Information
- Application Number
- CN202421520232.5
- 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 formations, it is difficult for the existing technology to effectively form a solid pile foundation. The grouting method requires mud to protect the wall when pre-forming holes, while deep holes in the sand and pebbles formation are prone to collapse, resulting in slow construction speed; the high-pressure spin spraying method has poor pile formation effect.
By pouring the grouting body in the sand and pebbles formation and setting a grouting pipe therein, the post-grough liquid is injected into the grouting body to form an expanded pile, and the structural strength of the grouting body and the bearing capacity of the sand and pebbles formation are improved. At the same time, auxiliary parts such as horn cylinder, outer sleeve and inner sleeve are provided to facilitate insertion of the grouting tube into the center of the grouting body and observe the construction situation through the slurry passage.
The formation of a solid pile foundation in the sand and pebbles formation is achieved, the structural strength of the grouting body and the bearing capacity of the sand and pebbles formation is improved, the construction process is simplified, and the construction speed and efficiency are improved.
Smart Images
Figure CN222715958U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pile construction, and in particular relates to a foundation treatment structure used for sand and gravel strata. 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 formations, grouting requires mud wall protection during pre-drilling, and deep holes in gravel and sandy formations 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 formations is not good. Therefore, a foundation treatment structure for gravel and sandy formations is needed, which can form a solid pile foundation in gravel and sandy formations to achieve secondary treatment of gravel and sandy formations. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a foundation treatment structure for sand and gravel formations 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 formation at the same time, thereby forming a solid pile foundation in the sand and gravel formation and realizing the secondary treatment of the sand and gravel formation. By arranging auxiliary parts, it is convenient for the grouting pipe to directly pass through the inner sleeve 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 treatment structure for sand and gravel formations, characterized in that: it includes a grouting body poured in the sand and gravel formation and a grouting pipe arranged in the grouting body, and a 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 compacted fill, and the upper part of the grouting pipe is located in the auxiliary part;
[0005] The auxiliary part includes a horn arranged in the compacted fill and an outer sleeve arranged at the lower part of the horn, the outer sleeve extends into the grouting body, and an inner sleeve is arranged in the outer sleeve, the inner sleeve is sleeved on the outer side of the grouting pipe, the axis of the inner sleeve coincides with the axis of the grouting body, a plurality of connecting blocks are arranged between the outer sleeve and the inner sleeve, and an overflow channel is arranged between two adjacent connecting blocks.
[0006] The above-mentioned foundation treatment structure for sand and gravel strata is characterized in that the grouting body is a high-pressure rotary jet grouting body in an initial setting state.
[0007] The above-mentioned foundation treatment structure for sand and gravel strata is characterized in that the length of the grouting pipe is greater than the length of the grouting body, the bottom of the grouting pipe is flush with the bottom of the grouting body, and the top of the grouting pipe extends into the horn.
[0008] The above-mentioned foundation treatment structure for sand and gravel strata 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 foundation treatment structure for sand and gravel formations is characterized in that the upper part of the horn is a large-diameter end, the lower part of the horn is a small-diameter end, and the overflow channel is connected to the interior of the horn.
[0010] The above-mentioned foundation treatment structure for sand and gravel formations is characterized in that: the connection blocks are in two groups, and the two groups of connection blocks are respectively connected to the upper end and the lower end of the outer side of the inner sleeve;
[0011] The number of the connection blocks in any group is at least two.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] 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 initial 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, realizing the secondary treatment of the gravel stratum, and facilitating popularization and use.
[0014] 2. The utility model provides auxiliary parts to facilitate the grouting pipe to directly pass through the inner sleeve 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. By providing an overflow channel, it is convenient to observe the liquid level of the grouting body when pouring the post-grouting liquid. When the grouting body overflows too much from the overflow channel into the horn, the delivery of the post-grouting liquid can be stopped. When the liquid level of the grouting body drops too much, it is convenient to warn the technicians to further check the pile state of the grouting body, which has strong practicality.
[0015] 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 and realizing the re-processing of the sand and gravel formation. By arranging auxiliary parts, it is convenient for the grouting pipe to directly pass through the inner sleeve 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.
[0016] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Figure 2 It is a structural schematic diagram of the auxiliary part of the utility model.
[0019] Description of reference numerals:
[0020] 1-compacted fill; 2-sand and gravel stratum; 3-grouting body;
[0021] 4- grouting pipe; 5- post-grouting liquid; 6- auxiliary parts;
[0022] 7-horn; 8-outer sleeve; 9-inner sleeve;
[0023] 10-connecting block; 11-overflow channel. DETAILED DESCRIPTION
[0024] 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 compacted fill 1, and the upper part of the grouting pipe 4 is located in the auxiliary part 6.
[0025] The auxiliary part 6 includes a horn 7 arranged in the compacted fill 1 and an outer sleeve 8 arranged at the lower part of the horn 7, the outer sleeve 8 extends into the grouting body 3, and an inner sleeve 9 is arranged in the outer sleeve 8, the inner sleeve 9 is sleeved on the outer side of the grouting pipe 4, the axis of the inner sleeve 9 coincides with the axis of the grouting body 3, a plurality of connecting blocks 10 are arranged between the outer sleeve 8 and the inner sleeve 9, and an overflow channel 11 is arranged between two adjacent connecting blocks 10.
[0026] In this embodiment, the grouting body 3 is a high-pressure rotary spray grouting body in an initial setting state.
[0027] 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, and realizing the re-treatment of the gravel formation.
[0028] It should be noted that, by providing the auxiliary part 6, it is convenient for the grouting pipe 4 to directly pass through the inner sleeve 9 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 overflow channel 11, it is convenient to observe the liquid level of the grouting body 3 when pouring the post-grouting liquid 5. When the grouting body 3 overflows excessively from the overflow channel 11 into the horn 7, the transportation of the post-grouting liquid 5 can be stopped. When the liquid level of the grouting body 3 drops too much, it is convenient to alert the technicians to further check the pile state of the grouting body 3.
[0029] In this embodiment, the length of the grouting pipe 4 is greater than the length of the grouting body 3 , the bottom of the grouting pipe 4 is flush with the bottom of the grouting body 3 , and the top of the grouting pipe 4 extends into the horn 7 .
[0030] 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 .
[0031] 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 be extended from the inner sleeve 9 into the horn 7, which makes it convenient for technicians to connect the grouting pipe 4 and the grouting equipment.
[0032] In this embodiment, the upper portion of the horn 7 is a large-diameter end, the lower portion of the horn 7 is a small-diameter end, and the overflow channel 11 is connected to the interior of the horn 7 .
[0033] In this embodiment, there are two groups of connection blocks 10, and the two groups of connection blocks 10 are respectively connected to the upper end and the lower end of the outer side of the inner sleeve 9; the number of the connection blocks 10 in any group is at least two.
[0034] In actual use, at least two connecting blocks 10 respectively connect the outer upper part of the inner sleeve 9 and the inner upper part of the outer sleeve 8, and at least another two connecting blocks 10 respectively connect the outer lower part of the inner sleeve 9 and the inner lower part of the outer sleeve 8. The upper and lower parts of the inner sleeve 9 and the outer sleeve 8 are respectively connected by the connecting blocks 10, and the connection stability is strong.
[0035] 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 treatment structure for sand and gravel strata, 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), 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 compacted fill (1), and the upper part of the grouting pipe (4) is located in the auxiliary part (6); The auxiliary component (6) comprises a horn (7) arranged in the compacted fill (1) and an outer sleeve (8) arranged at the lower part of the horn (7); the outer sleeve (8) extends into the grouting body (3); an inner sleeve (9) is arranged in the outer sleeve (8); the inner sleeve (9) is sleeved on the outer side of the grouting pipe (4); the axis of the inner sleeve (9) coincides with the axis of the grouting body (3); a plurality of connecting blocks (10) are arranged between the outer sleeve (8) and the inner sleeve (9); and an overflow channel (11) is arranged between two adjacent connecting blocks (10).
2. A foundation treatment structure for sand and gravel strata 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. A foundation treatment structure for sand and gravel strata according to claim 1, characterized in that: The length of the grouting pipe (4) is greater than the length of the grouting body (3), the bottom of the grouting pipe (4) is flush with the bottom of the grouting body (3), and the top of the grouting pipe (4) extends into the horn (7).
4. A foundation treatment structure for sand and gravel strata 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 treatment structure for sand and gravel strata according to claim 1, characterized in that: The upper part of the horn (7) is the large-diameter end, the lower part of the horn (7) is the small-diameter end, and the overflow channel (11) is connected to the interior of the horn (7).
6. The foundation treatment structure for sand and gravel strata according to claim 1, characterized in that: The connecting blocks (10) are in two groups, and the two groups of connecting blocks (10) are respectively connected to the upper end and the lower end of the outer side of the inner sleeve (9); The number of the connecting blocks (10) in any group is at least two.