Composite high-pressure jet grouting pile body structure
By introducing anchor cable components into the high-pressure rotary spray pile body structure, it provides pull-resistant bearing capacity, and solves the problem of high-pressure rotary spray pile lacking floating resistance, achieving the effect of foundation reinforcement and floating resistance, while avoiding soil extrusion effect, improving the safety, convenience and economical construction.
Patent Information
- Application Number
- CN202421308887.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-07
AI Technical Summary
High-pressure rotary spray piles lack the ability to resist floating when emptying water bodies in structures such as water pools and cannot meet the requirements for floating resistance.
A composite high-pressure rotary spray pile body structure is designed, including foundation base plate, high-pressure rotary spray pile body and anchor cable assembly. The high-pressure rotary spray pile body provides vertical bearing capacity, and the anchor cable assembly is arranged axially along the high-pressure rotary spray pile body to provide anti-pull bearing capacity.
By integrating the vertical pressure bearing and anchor cable resistance of high-pressure rotary spray piles, the effect of foundation reinforcement and anti-float is achieved, while avoiding the soil extrusion effect, and there are advantages in construction safety, convenience and economics.
Smart Images
Figure CN222771458U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of structural reinforcement, in particular to a composite high-pressure rotary grouting pile structure. Background Art
[0002] In coastal soft soil areas, when buildings and structures suffer from tilting, excessive settlement, foundation cracking and other problems, foundation reinforcement is required. There are generally two main reinforcement schemes: static pressure steel pipe pile reinforcement and high-pressure rotary jet pile reinforcement.
[0003] Among them, high-pressure jet grouting piles use high-pressure rotating nozzles to spray cement slurry into the soil layer and mix it with the soil to form a cement reinforcement body, which significantly improves the quality of the foundation soil. High-pressure jet grouting piles have the characteristics of convenient construction, low cost, and no soil squeezing effect. They are widely used in underground engineering, building reinforcement and other fields.
[0004] However, high-pressure jet grouting piles have the following problems: they do not have pull-out bearing capacity and cannot meet the anti-floating requirements when structures such as pools are emptied of water. Utility Model Content
[0005] The technical problem to be solved by the utility model is: to provide a composite high-pressure rotary grouting pile body structure in view of the above-mentioned problems.
[0006] The technical solution adopted by the utility model is: a composite high-pressure rotary grouting pile structure, characterized in that it includes:
[0007] foundation slab;
[0008] A high-pressure jet-sprayed pile body is arranged at the bottom of the foundation slab, and the high-pressure jet-sprayed pile body is used to provide vertical bearing capacity;
[0009] The anchor cable assembly is arranged inside the foundation bottom plate and the high-pressure jet grouting pile body and along the axial direction of the high-pressure jet grouting pile body. The anchor cable assembly is used to provide pull-out resistance.
[0010] Through the above-mentioned technical means, high-pressure rotary jet pile body is used for vertical pressure bearing. An anchor cable assembly connected to the foundation bottom plate is provided in the high-pressure rotary jet pile body. By utilizing the pull-out resistance of the anchor cable assembly, the high-pressure rotary jet pile body and the anchor cable assembly cooperate to achieve the effect of foundation reinforcement and anti-floating without producing soil squeezing effect.
[0011] In some embodiments, the anchor cable assembly includes an anchor cable, an anchor pad, an anchor plate and a matching anchor. The anchor pad is arranged on the top of the foundation base plate, and the anchor plate is arranged on the inner bottom of the high-pressure rotary jet pile body. Both the anchor pad and the anchor plate are provided with anchor holes matching the anchor cable. One end of the anchor cable passes through the anchor hole and is fixedly connected to the anchor plate in cooperation with the matching anchor. The other end of the anchor cable passes through the anchor hole and is fixedly connected to the anchor plate in cooperation with the matching anchor.
[0012] In some embodiments, the anchor cable is composed of two The length of the anchor cable is consistent with the length of the high-pressure rotary jet pile body, and the length of the high-pressure rotary jet pile body is determined based on the vertical bearing capacity required by the project and the actual geological conditions.
[0013] In some embodiments, the anchor plate is made of a rectangular steel plate, the steel type of the anchor plate is Q235B grade, the size of the anchor plate is 250mmx250mmx15mm, and the middle of the anchor plate is vertically opened with a size of The circular anchor holes are provided, and the number of the circular anchor holes corresponds to the anchor cable.
[0014] In some embodiments, the anchor plate is made of a circular steel plate, the steel type of the anchor plate is Q235B grade, and the diameter of the anchor plate is The thickness is 15mm, and the middle part of the anchor plate is vertically opened with a size of The circular anchor holes are provided, and the number of the circular anchor holes corresponds to the anchor cable.
[0015] In some embodiments, a through hole is opened in the middle of the anchor plate to facilitate the operation of the jet grouting pile drilling rig nozzle, and the diameter of the through hole is 25 mm.
[0016] In some embodiments, a hole for constructing the high-pressure jet grouting pile body is provided in the middle of the foundation slab, and high-strength concrete for sealing and filling the anchor assembly and the foundation slab is provided in the hole.
[0017] The beneficial effects of the utility model are:
[0018] 1. By integrating the vertical bearing capacity of high-pressure jet grouting piles and the pull-out resistance of anchor cables, it can not only achieve the effect of foundation reinforcement and anti-floating, but also will not produce soil squeezing effect, and will have less disturbance to existing buildings and surrounding facilities. Compared with traditional static pressure steel pipe piles, it has greater advantages in construction safety, convenience and economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of this application.
[0020] Figure 2 It is a structural schematic diagram of the anchor pad in this application.
[0021] Figure 3 It is a structural schematic diagram of the anchor plate in this application.
[0022] Description of reference numerals:
[0023] 1. High-pressure jet grouting pile body; 2. Anchor cable; 3. Anchor pad; 4. Anchor plate; 5. Matching anchor; 6. Foundation bottom plate; 7. High-strength concrete.
[0024] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures or characteristics may be combined in any suitable manner consistent with the present disclosure.
[0025] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps. DETAILED DESCRIPTION
[0026] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below in conjunction with specific embodiments.
[0027] Combination Figures 1 to 3 As shown, this embodiment is a composite high-pressure rotary jet pile body structure, which is suitable for reinforcement projects, including a foundation base plate 6, a high-pressure rotary jet pile body 1 and an anchor cable assembly. A high-pressure rotary jet pile body 1 is provided at the bottom of the foundation base plate 6. The high-pressure rotary jet pile body 1 is used to provide vertical bearing capacity. Anchor cable assemblies are provided inside the foundation base plate 6 and the high-pressure rotary jet pile body 1. The anchor cable assembly is arranged along the axial direction of the high-pressure rotary jet pile body 1, and the anchor cable assembly is used to provide pull-out bearing capacity.
[0028] Furthermore, a circular hole with a diameter of 150 mm is opened in the middle of the foundation bottom plate 6, and the hole is used for constructing the high-pressure jet grouting pile body 1. The high-pressure jet grouting pile body 1 is formed by extending the nozzle of the jet grouting pile drill into the bottom soil of the foundation bottom plate 6 and jetting cement slurry. The anchor cable assembly is brought into the pile body while the high-pressure jet grouting pile body 1 is jetted and stirred. After the construction of the high-pressure jet grouting pile body 1 and the anchor cable 2 assembly is completed, the hole is filled with high-strength concrete 7 with a compressive strength grade of C35. The top of the pile body is the bottom elevation of the foundation bottom plate 6, the pile diameter of the high-pressure jet grouting pile body 1 is 700 mm, and the pile length of the high-pressure jet grouting pile body 1 is about 20 m.
[0029] In some embodiments, the anchor cable assembly includes an anchor cable 2, an anchor pad 3, an anchor plate 4 and a matching anchor 5. The anchor pad 3 is arranged on the top of the foundation base plate 6, and the anchor plate 4 is arranged on the inner bottom of the high-pressure rotary jet pile body 1. The anchor pad 3 and the anchor plate 4 are both provided with anchor holes that match the anchor cable 2. One end of the anchor cable 2 passes through the anchor hole and is fixedly connected to the anchor pad 3 in cooperation with the matching anchor 5. The other end of the anchor cable 2 passes through the anchor hole and is fixedly connected to the anchor plate 4 in cooperation with the matching anchor 5.
[0030] Further, such as Figure 2 As shown, the anchor plate 3 is made of rectangular steel plate, the steel type of the anchor plate 3 is Q235B grade, the size of the anchor plate 3 is 250mmx250mmx15mm, and a circular anchor hole with a size of φ20mm is vertically opened in the middle of the anchor plate 3. The diameter of the circular anchor hole is slightly larger than the diameter of the anchor cable 2, and the number of the circular anchor holes corresponds to the anchor cable 2.
[0031] Further, such as Figure 3 As shown, the anchor plate 4 is made of circular steel plate, and the steel type of the anchor plate 4 is Q235B grade. The diameter of the anchor plate 4 is φ130mm and the thickness is 15mm. A circular anchor hole with a size of φ20mm is vertically opened in the middle of the anchor plate 4. The diameter of the circular anchor hole is slightly larger than the diameter of the anchor cable 2. The number of the circular anchor holes corresponds to the anchor cable 2, and the circular anchor holes on the anchor plate 4 correspond one to one with the circular anchor holes on the anchor pad 3.
[0032] Furthermore, a through hole is provided in the middle of the anchor plate 4 to facilitate the passage and operation of the jet grouting pile drilling rig nozzle, and the diameter of the through hole is 25 mm.
[0033] Furthermore, the anchor cable 2 is generally made of steel strands, and the number and length of the anchor cables 2 are determined by the required pull-out bearing capacity. Grade steel strand, the length of anchor cable 2 is consistent with the length of high pressure jet grouting pile body 1, and the length of high pressure jet grouting pile body 1 is determined based on the vertical bearing capacity required by the project and the actual geological conditions. Correspondingly, the number of circular anchor holes on anchor pad 3 and anchor plate 4 are both two, and the center distance between the two circular anchor holes is 80mm.
[0034] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A composite high-pressure jet grouting pile structure, characterized in that: include: Foundation slab (6); A high-pressure jet-sprayed pile body (1) is arranged at the bottom of the foundation base plate (6), and the high-pressure jet-sprayed pile body (1) is used to provide vertical bearing capacity; An anchor cable assembly is provided inside the foundation bottom plate (6) and the high-pressure jet grouting pile body (1), and is arranged along the axial direction of the high-pressure jet grouting pile body (1), and the anchor cable assembly is used to provide pull-out resistance; The anchor cable assembly comprises an anchor cable (2), an anchor pad (3), an anchor plate (4) and a matching anchor (5); the anchor pad (3) is arranged on the top of the foundation bottom plate (6); the anchor plate (4) is arranged on the inner bottom of the high-pressure rotary jet pile body (1); the anchor pad (3) and the anchor plate (4) are both provided with anchor holes matching the anchor cable (2); one end of the anchor cable (2) passes through the anchor hole and is fixedly connected to the anchor plate (3) in cooperation with the matching anchor (5); the other end of the anchor cable (2) passes through the anchor hole and is fixedly connected to the anchor plate (4) in cooperation with the matching anchor (5).
2. A composite high-pressure jet grouting pile structure according to claim 1, characterized in that: The anchor cable (2) is composed of two The length of the anchor cable (2) is consistent with the length of the high-pressure jet grouting pile body (1), and the length of the high-pressure jet grouting pile body (1) is determined based on the vertical bearing capacity required by the project and the actual geological conditions.
3. A composite high-pressure jet grouting pile structure according to claim 1, characterized in that: The anchor plate (3) is made of a rectangular steel plate. The steel material model of the anchor plate (3) is Q235B grade. The size of the anchor plate (3) is 250mmx250mmx15mm. The middle part of the anchor plate (3) is vertically opened with a size of The circular anchor holes are provided, and the number of the circular anchor holes corresponds to the anchor cable (2).
4. A composite high-pressure jet grouting pile structure according to claim 1, characterized in that: The anchor plate (4) is made of a circular steel plate. The steel material of the anchor plate (4) is Q235B grade. The diameter of the anchor plate (4) is The thickness is 15 mm, and the middle part of the anchor plate (4) is vertically provided with a size of The circular anchor holes are provided, and the number of the circular anchor holes corresponds to the anchor cable (2).
5. A composite high-pressure jet grouting pile structure according to claim 4, characterized in that: A through hole is provided in the middle of the anchor plate (4) to facilitate the operation of the jet grouting pile drilling rig nozzle, and the diameter of the through hole is 25 mm.
6. A composite high-pressure jet grouting pile structure according to claim 1, characterized in that: A hole for constructing the high-pressure jet-jet pile body (1) is provided in the middle of the foundation bottom plate (6), and high-strength concrete (7) for sealing and filling the anchor cable assembly and the foundation bottom plate (6) is provided in the hole.