Soil-retaining and water-stopping supporting structure in area where fender posts cannot be closed
Through high-pressure rotary spray piles and reinforced drilling and cast-in piles combined with channel steel and hanging net spraying technology, the slope instability and groundwater leakage caused by the inability to close the enclosed piles is solved, and cost reduction and construction are achieved The effect of complexity.
Patent Information
- Application Number
- CN202420803475.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-17
AI Technical Summary
In the construction of urban underground pipelines, when an unchangeable underground obstacle is encountered, conventional treatment methods will cause the enclosing piles to fail to close, resulting in problems such as slope soil instability and groundwater leakage, increasing costs and construction complexity.
High-pressure rotary spray piles and reinforced drilling cast piles combined with channel steel and hanging net spraying technology to wrap underground obstacles, increase structural stability by strengthening drilling cast piles and concrete crown beams, and use U-shaped steel bar connections and multiple The high-pressure rotary spray pile structure is used to enhance the support effect and avoid cutting and re-excavation.
It effectively avoids slope soil instability and groundwater leakage, reduces construction costs and complexity, improves the stability and water stop effect of the foundation pit, and avoids the need for workers to re-excend the foundation pit.
Smart Images
Figure CN222252147U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of construction and building, and in particular relates to a soil retaining and water stopping supporting structure in an area where the retaining piles cannot be closed. Background Art
[0002] In the process of urban underground pipeline construction, it is inevitable to involve excavation methods such as jacking, concealed excavation, pipe pulling, and support excavation. For support excavation, support piles are generally constructed on both sides of the new pipeline. Water-stop curtains are constructed on the outside of the support piles to enhance the water-stopping effect of the foundation pit. After that, foundation pit excavation is carried out. Underground obstacles will inevitably be encountered during the excavation process. The conventional practice is to first determine whether the underground obstacles have a purpose. For useful underground obstacles, cutting and modification are used, and for useless underground obstacles, obstacle removal is used.
[0003] However, when encountering obstacles such as underground pipelines that cannot be cut or modified, or when cutting and modification will greatly increase the cost, in order to reduce costs, the foundation pit support design can be carried out while avoiding the original underground pipelines. As a result, the retaining piles cannot be closed, which often leads to problems such as slope soil instability and frequent groundwater leakage. Utility Model Content
[0004] In view of this, the utility model aims to provide a soil retaining and water stopping support structure for the area where the retaining piles cannot be closed, in order to solve at least one of the above-mentioned technical problems.
[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:
[0006] A soil retaining and water stopping support structure for an area where retaining piles cannot be closed, comprising:
[0007] High-pressure jet grouting piles, underground obstacles are set through the high-pressure jet grouting piles;
[0008] Reinforced bored piles, two of which are arranged at both ends of the high-pressure jet grouting piles; channel steel, two of which are connected by channel steel;
[0009] A mesh spraying layer is provided on one side of the high-pressure jet grouting pile and the reinforced bored cast-in-place pile close to the channel steel.
[0010] Furthermore, bored piles are provided on both sides of the reinforced bored piles;
[0011] A water-stop curtain is arranged on the outer side walls of the high-pressure jet-jet piles and bored cast-in-place piles away from the foundation pit.
[0012] Furthermore, the tops of the reinforced bored piles and bored piles are provided with concrete cap beams, and the concrete cap beams on both sides of the foundation pit are connected by concrete support members. There are multiple concrete support members, and the multiple concrete support members are evenly arranged along the length direction of the concrete cap beams.
[0013] Furthermore, first connecting pieces are fixedly provided at both ends of the channel steel, mounting holes are opened on the reinforced bored piles, and the first connecting piece penetrates the mounting holes and is welded to the steel bars in the reinforced bored piles.
[0014] Furthermore, the first connecting member is a steel bar connecting member, and the steel bar connecting member is configured as a U-shaped structure.
[0015] Furthermore, a second connecting piece is provided on the channel steel, and the second connecting piece is connected to the high-pressure rotary jet pile.
[0016] Furthermore, the second connecting member includes a fixing rod and a fixing block, and one end of the fixing rod is connected to the high-pressure jet grouting pile through the fixing block and the channel steel.
[0017] Furthermore, the high-pressure jet grouting piles are arranged in a multi-row structure.
[0018] Compared with the prior art, the soil retaining and water stopping support structure in the area where the retaining piles cannot be closed described in the utility model has the following beneficial effects:
[0019] The utility model discloses a soil retaining and water-stopping supporting structure for an area where retaining piles cannot be closed. Reinforced bored piles are arranged at both sides of the high-pressure rotary jet piles to increase the protection strength. Underground obstacles are directly wrapped in the high-pressure rotary jet piles to avoid cutting and changing the underground obstacles, thereby reducing costs, avoiding changing positions, and avoiding workers from re-digging the direction of the foundation pit. The left and right ends of the long strip of channel steel are respectively installed on the reinforced bored piles. Workers need to chisel corresponding installation grooves on the reinforced bored piles to facilitate workers to install the channel steel. The first connecting piece can increase the stability of the connection between the channel steel and the reinforced bored piles and increase the installation strength. The high-pressure rotary jet piles and the reinforced bored piles on one side close to the channel steel are then supplemented with mesh spraying to increase the strength and avoid the instability of the slope soil and the occurrence of groundwater leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the top view of the soil retaining and water stopping support structure according to an embodiment of the utility model;
[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the soil retaining and water stopping support structure described in the embodiment of the utility model;
[0023] Figure 3 This is a schematic diagram of the installation of the channel steel according to the embodiment of the utility model;
[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the channel steel described in an embodiment of the utility model.
[0025] Description of reference numerals:
[0026] 100. High-pressure jet jet piles; 101. Water-stop curtain; 200. Reinforced bored piles; 201. Bored piles; 300. Channel steel; 301. First connecting piece; 302. Second connecting piece; 303. Fixing rod; 304. Fixing block; 400. Concrete crown beam; 401. Concrete support; 500. Underground obstacle. DETAILED DESCRIPTION
[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0031] like Figures 1 to 4 As shown, a retaining and water-stopping support structure for an area where retaining piles cannot be closed comprises:
[0032] The high-pressure jet grouting pile 100 and the underground obstacle 500 are arranged in the high-pressure jet grouting pile 100;
[0033] Reinforced bored piles 200, two reinforced bored piles 200 are arranged at both ends of the high-pressure jet grouting pile 100; channel steel 300, two reinforced bored piles 200 are connected by the channel steel 300;
[0034] A mesh spraying layer is provided on the side of the high-pressure jet grouting pile 100 and the reinforced bored pile 200 close to the channel steel 300. After the high-pressure jet grouting pile 100, the reinforced bored pile 200 and the channel steel 300 are firmly installed, the high-pressure jet grouting pile 100 and the reinforced bored pile 200 close to the channel steel 300 are further supplemented with mesh spraying to increase the strength and avoid the instability of the slope soil and the occurrence of groundwater leakage.
[0035] Bored piles 201 are provided on both sides of the reinforced bored piles 200; bored piles 201 are connected to both sides of the reinforced bored piles 200, and steel mesh is added between the bored piles 201 to increase strength. A water-stop curtain 101 is provided on the outer end of the high-pressure rotary jet pile 100, and concrete is arranged on the upper ends of multiple rows of piles to increase the stability of the pile body and reduce soil erosion.
[0036] A water-stop curtain 101 is provided on the outer side wall of the high-pressure jet grouting pile 100 and the bored cast-in-place pile 201 away from the foundation pit, and the water-stop curtain is cast and connected into a body to increase the firmness of the foundation pit.
[0037] A concrete cap beam 400 is provided at the top of the reinforced bored pile 200 and bored pile 201. The concrete cap beams 400 on both sides of the foundation pit are connected by concrete support members 401. There are multiple concrete support members 401, and the multiple concrete support members 401 are evenly arranged along the length direction of the concrete cap beam 400. The concrete support members 401 are arranged at a certain distance as needed to increase the stability of the foundation pit.
[0038] The first connector 301 is fixedly provided at both ends of the channel steel 300, and a mounting hole is provided on the reinforced bored pile 200. The first connector 301 penetrates the mounting hole and is welded to the steel bar in the reinforced bored pile 200. The first connector 301 is a steel bar connector, and the steel bar connector is set as a U-shaped structure. The outermost side of the reinforced bored pile 200 is a protective layer, and the inside of the protective layer is removed to form the main reinforcement. The stirrups are fixed on the outside of the main reinforcement. The corresponding mounting grooves are chiseled on the reinforced bored pile 200 to facilitate workers to weld the channel steel 300 and the main reinforcement together. The first connector 301 is connected to the channel steel 300 and the main reinforcement, which can increase the stability of the connection between the channel steel 300 and the reinforced bored pile 200 and increase the installation strength. The U-shaped structure is not only convenient for welding, but also can serve as a lifting lug during hoisting. The operation is simple and convenient, saving workers' operation time.
[0039] The channel steel 300 is provided with a second connecting piece 302, and the second connecting piece 302 is connected to the high-pressure rotary jet pile 100. The second connecting piece 302 includes a fixing rod 303 and a fixing block 304, and one end of the fixing rod 303 is connected to the high-pressure rotary jet pile 100 through the fixing block 304 and the channel steel 300. When the channel steel 300 is located at the upper end of the underground obstacle 500, the two ends of the channel steel 300 are fixed to the reinforced bored pile 200. When the channel steel 300 is located at the lower end of the underground obstacle 500, the two ends of the channel steel 300 are fixed to the reinforced bored pile 200, and the middle position of the channel steel 300 is fixed to the high-pressure rotary jet pile 100 through the second connecting piece 302, thereby increasing the stability of the connection of the channel steel 300. The fixing block 304 can also act as a gasket to increase the stability of the fixing rod 303.
[0040] The high-pressure rotary jet piles 100 are arranged in a multi-row structure. The high-pressure rotary jet piles 100 can be arranged in a three-row or other multi-row structure, which can increase the contact area between the underground obstacles 500 and the high-pressure rotary jet piles 100, increase stability, enhance the water-stopping effect, increase the soil strength of the unclosed section, and avoid accidents.
[0041] In the process of urban underground pipeline construction, it is inevitable to involve excavation methods such as jacking, concealed excavation, pipe pulling, and support excavation. For support excavation, support piles are generally constructed on both sides of the new pipeline first, and water-stop curtains 101 are constructed on the outside of the support piles to enhance the water-stopping effect of the foundation pit. After that, the foundation pit is excavated. During the excavation process, it is inevitable to encounter underground obstacles 500. The conventional practice is to first determine whether the underground obstacles 500 are useful. For useful underground obstacles 500, cutting and modification are adopted, and for useless underground obstacles 500, obstacle removal is adopted.
[0042] When encountering an underground obstacle 500 that cannot be changed, a high-pressure rotary jet pile 100 is cast at the bottom of the underground obstacle 500. As the height of the high-pressure rotary jet pile 100 continues to increase, the underground obstacle 500 is wrapped and set in the high-pressure rotary jet pile 100 to increase the effect of water stopping and reinforcing the plastic body. The reinforced bored piles 200 are set on the left and right sides of the high-pressure rotary jet pile 100 to increase the protection strength. The high-pressure rotary jet pile 100 extends directly to the ground, and the concrete crown beam 400 is set at the upper end of the reinforced bored pile 200 to increase stability. The underground obstacle 500 is usually some pipes or lines whose position cannot be changed. The underground obstacle 500 directly runs through the high-pressure rotary jet pile 100 to avoid changing the position. It can also avoid workers from re-digging the direction of the foundation pit and reduce costs.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A soil retaining and water stopping support structure in an area where retaining piles cannot be closed, characterized in that: include: A high-pressure jet grouting pile (100), wherein an underground obstacle (500) is disposed through the high-pressure jet grouting pile (100); Reinforced bored cast-in-place piles (200), two of the reinforced bored cast-in-place piles (200) are arranged at both ends of the high-pressure jet grouting pile (100); Channel steel (300), the two reinforced bored piles (200) are connected via the channel steel (300); A mesh spraying layer is provided on one side of the high-pressure jet grouting pile (100) and the reinforced bored cast-in-place pile (200) close to the channel steel (300).
2. According to claim 1, a soil retaining and water stopping support structure for areas where retaining piles cannot be closed is characterized by: Bored piles (201) are provided on both sides of the reinforced bored pile (200); A water-stop curtain (101) is provided on the outer side walls of the high-pressure jet grouting pile (100) and the bored cast-in-place pile (201) away from the foundation pit.
3. According to claim 1, a soil retaining and water stopping support structure for areas where retaining piles cannot be closed is characterized by: A concrete cap beam (400) is provided at the top of the reinforced bored pile (200) and the bored pile (201), and the concrete cap beams (400) on both sides of the foundation pit are connected by concrete support members (401). The number of the concrete support members (401) is multiple, and the multiple concrete support members (401) are evenly arranged along the length direction of the concrete cap beam (400).
4. According to claim 1, a soil retaining and water stopping support structure in an area where the retaining piles cannot be closed is characterized by: The first connecting pieces (301) are fixedly provided at both ends of the channel steel (300), a mounting hole is opened on the reinforced bored pile (200), and the first connecting piece (301) passes through the mounting hole and is welded to the steel bars in the reinforced bored pile (200).
5. According to claim 4, a soil retaining and water stopping support structure for areas where retaining piles cannot be closed is characterized by: The first connecting member (301) is a steel bar connecting member, and the steel bar connecting member is configured as a U-shaped structure.
6. According to claim 4, a soil retaining and water stopping support structure for areas where retaining piles cannot be closed is characterized by: The channel steel (300) is provided with a second connecting piece (302), and the second connecting piece (302) is connected to the high-pressure jet grouting pile (100).
7. According to claim 6, a soil retaining and water stopping support structure for areas where retaining piles cannot be closed is characterized by: The second connecting member (302) comprises a fixing rod (303) and a fixing block (304), and one end of the fixing rod (303) is connected to the high-pressure jet grouting pile (100) via the fixing block (304) and the channel steel (300).
8. According to claim 1, a soil retaining and water stopping support structure in an area where the retaining piles cannot be closed is characterized by: The high-pressure jet grouting piles (100) are arranged in a multi-row structure.