Soft soil layer grouting reinforcement structure in karst area
By designing a mesh reinforcement structure for reinforcement columns and connecting beams in the weak soil layer in the karst area, and setting a waterproof structure in the reinforcement column, the settlement, sliding and corrosion problems of the weak soil layer are solved, and the reinforcement effect and stability are improved.
Patent Information
- Application Number
- CN202420380182.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-02-28
AI Technical Summary
In the weak soil layers in karst areas, the grouting reinforced structure has the risk of settlement and horizontal sliding. At the same time, due to the high water content, there are problems of water stain invasion and corrosion, resulting in limited reinforcement effect.
Design a grouting reinforcement structure for weak soil layer in karst areas, adopt reinforcement columns and connecting beams fixed in the foundation main body, and form a mesh reinforcement structure through the combination of drilling holes and prefabricated waterproof sleeves, and set up a waterproof structure in the reinforcement column. To isolate groundwater.
Connecting adjacent reinforced columns through connecting beams improves the stability of the structure, reduces the risk of lateral flow of the soft soil layer, and reduces the risk of corrosion through the waterproof structure and improves the support strength of the reinforced columns.
Smart Images
Figure CN222500198U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reinforcing soft soil layers, in particular to a grouting reinforcement structure for soft soil layers in karst areas. Background Art
[0002] Strengthening of soft soil layers refers to improving the bearing capacity and stability of soft soil layers through a series of engineering measures and technical means to ensure the safety and reliability of foundation projects. Reinforcement is usually carried out by pouring concrete columns.
[0003] During the grouting reinforcement process, the reinforcement columns are mainly arranged in a vertical structure. In this case, the water exchange rate of the soft soil layer is relatively high. In addition to the risk of settlement, there is also the risk of horizontal sliding. At this time, the reinforcement capacity of relying solely on upright columns for protection is limited, and the high water content also poses the risk of water intrusion, causing corrosion of the main body. Therefore, it is necessary to design a more solid and waterproof reinforcement structure. Utility Model Content
[0004] The utility model aims to solve the problems existing in the background technology and proposes a grouting reinforcement structure for soft soil layers in karst areas.
[0005] The technical solution of the utility model is as follows: a grouting reinforcement structure for soft soil layers in karst areas, comprising reinforcement columns and connecting beams fixed in a foundation body, wherein the foundation body comprises a rock layer and a soft soil layer from bottom to top, and boreholes are equidistantly arranged on the surface of the foundation body, and the bottoms of the boreholes extend downwardly and are located in the rock layer, the reinforcement columns are arranged in the boreholes, and transverse holes are opened in the soft soil layer and between adjacent boreholes, the connecting beams are cast in the transverse holes, and both ends are fixed to the reinforcement columns.
[0006] Preferably, the reinforcement column consists of a concrete body, a prefabricated waterproof sleeve, reinforcement steel bars and an outer filling sleeve, the reinforcement steel bars are arranged in the concrete body, and the prefabricated waterproof sleeve is located between the concrete body and the outer filling sleeve.
[0007] Preferably, the prefabricated waterproof cover has an outer plate on its outer side, and the outer diameter of the outer plate is the same as the diameter of the drill hole. When the prefabricated waterproof cover is inserted into the drill hole, its stability can be guaranteed and it will not tilt.
[0008] Preferably, the diameter of the drill hole in the rock layer is smaller than the diameter of the drill hole in the soft soil layer, and the diameter of the drill hole in the rock layer is the same as the inner diameter of the prefabricated waterproof sleeve.
[0009] Preferably, a grouting hole is opened in the soft soil layer and located in the middle of the transverse hole. The upper end of the grouting hole is an open structure, and the bottom is connected to the lowest transverse hole. Cement slurry can be injected into the transverse hole through the grouting hole to form a connecting beam to connect the reinforcement column.
[0010] Compared with the prior art, the utility model has the following beneficial technical effects: adjacent reinforcement columns are connected by connecting beams to improve stability and reduce the risk of lateral flow in soft soil layers; at the same time, a waterproof structure is set inside the reinforcement columns to reduce corrosion caused by groundwater infiltration and improve the supporting strength of the reinforcement columns. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of the reinforcement column of the utility model inserted into the internal part of the foundation body;
[0012] Figure 2 This is a schematic diagram of the structure of the reinforcement column of the utility model;
[0013] Figure 3 It is a schematic diagram of the combined structure of the reinforcement column and the connecting beam of the utility model.
[0014] Figure numerals: 1. foundation body; 11. rock layer; 12. soft soil layer; 2. drill hole; 3. transverse hole; 4. grouting hole; 5. reinforcement column; 51. concrete body; 52. prefabricated waterproof cover; 53. outer filling cover; 54. reinforcement steel bar; 55. outer plate; 6. connecting beam. DETAILED DESCRIPTION
[0015] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] Example
[0017] like Figure 1-3 As shown, the utility model proposes a grouting reinforcement structure for soft soil layers in karst areas, including a reinforcement column 5 and a connecting crossbeam 6 fixed in a foundation body 1. The foundation body 1 is composed of a rock layer 11 and a soft soil layer 12 from bottom to top. Drill holes 2 are equidistantly arranged on the surface of the foundation body 1, and the bottom of the drill hole 2 extends downward and is located in the rock layer 11. The reinforcement column 5 is arranged in the drill hole 2, and a transverse hole 3 is opened in the soft soil layer 12 and between adjacent drill holes 2. The connecting crossbeam 6 is cast in the transverse hole 3, and the two ends are connected to the reinforcement The column 5 is fixed, the diameter of the drill hole 2 in the rock layer 11 is smaller than the diameter of the drill hole 2 in the soft soil layer 12, the diameter of the drill hole 2 in the rock layer 11 is the same as the inner diameter of the prefabricated waterproof sleeve 52, a grouting hole 4 is opened in the soft soil layer 12 and located in the middle of the transverse hole 3, the upper end of the grouting hole 4 is an open structure, and the bottom is connected to the lowest transverse hole 3, a grouting hole 4 is drilled on the soft soil layer 12 and located at the center of the connecting transverse hole 3, cement slurry is injected into the grouting hole 4, and flows into the transverse hole 3 to form a connecting beam 6.
[0018] The reinforcement column 5 is composed of a concrete body 51, a prefabricated waterproof cover 52, reinforcement steel bars 54 and an outer filling cover 53. The reinforcement steel bars 54 are arranged in the concrete body 51. The prefabricated waterproof cover 52 is located between the concrete body 51 and the outer filling cover 53. There is an outer plate 55 on the outside of the prefabricated waterproof cover 52. The outer diameter of the outer plate 55 is the same as the diameter of the borehole 2. The prefabricated waterproof cover 52 is inserted into the borehole 2 so that its bottom is against the upper surface of the rock layer 11. The reinforcement steel bars 54 are then inserted into the borehole 2 and are located inside the prefabricated waterproof cover 52. Concrete is poured into the prefabricated waterproof cover 52 to solidify it into the concrete body 51.
[0019] In this embodiment, the foundation body 1 is firstly drilled, and the borehole 2 is extended downward into the rock layer 11, and a transverse hole 3 is set between adjacent boreholes 2, and then the prefabricated waterproof cover 52 is inserted into the borehole 2 so that its bottom is against the upper surface of the rock layer 11, and then the reinforcing steel bar 54 is inserted into the borehole 2 and located inside the prefabricated waterproof cover 52, and concrete is poured into the prefabricated waterproof cover 52 to solidify into a concrete body 51, and then a grouting hole 4 is drilled on the soft soil layer 12 and located at the center of the connecting transverse hole 3, and cement slurry is injected into the grouting hole 4, And it flows into the transverse hole 3 to form a connecting beam 6. At the same time, both ends of the transverse hole 3 are connected to the borehole 2. The cement slurry will flow into the borehole 2 and form an outer filling sleeve 53 on the outside of the prefabricated waterproof sleeve 52. Since the connecting beam 6 and the outer filling sleeve 53 are formed by grouting as a whole, the fixing between the connecting beam 6 and the reinforcement column 5 can be achieved. At this time, the reinforcement column 5 and the connecting beam 6 form a mesh reinforcement structure in the soft soil layer 12, which has higher stability than the independent column reinforcement structure. The prefabricated waterproof sleeve 52 can be used to isolate the concrete body 51 from groundwater, thereby improving the corrosion resistance.
[0020] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.
Claims
1. A grouting reinforcement structure for soft soil layers in karst areas, comprising a reinforcement column (5) and a connecting beam (6) fixed in a foundation body (1), characterized in that: The foundation body (1) comprises a rock layer (11) and a soft soil layer (12) from bottom to top, and boreholes (2) are arranged equidistantly on the surface of the foundation body (1), and the bottom of the borehole (2) extends downward and is located in the rock layer (11). The reinforcement column (5) is arranged in the borehole (2), and transverse holes (3) are opened in the soft soil layer (12) and between adjacent boreholes (2). The connecting crossbeam (6) is cast in the transverse hole (3), and its two ends are fixed to the reinforcement column (5).
2. A grouting reinforcement structure for soft soil layers in karst areas according to claim 1, characterized in that: The reinforcement column (5) is composed of a concrete body (51), a prefabricated waterproof sleeve (52), reinforcement steel bars (54) and an outer filling sleeve (53); the reinforcement steel bars (54) are arranged in the concrete body (51); and the prefabricated waterproof sleeve (52) is located between the concrete body (51) and the outer filling sleeve (53).
3. A grouting reinforcement structure for soft soil layers in karst areas according to claim 2, characterized in that: The prefabricated waterproof cover (52) is provided with an outer plate (55) on the outside, and the outer diameter of the outer plate (55) is the same as the diameter of the drill hole (2).
4. The grouting reinforcement structure for soft soil layers in karst areas according to claim 1 is characterized in that: The diameter of the drill hole (2) in the rock layer (11) is smaller than the diameter of the drill hole (2) in the soft soil layer (12), and the diameter of the drill hole (2) in the rock layer (11) is the same as the inner diameter of the prefabricated waterproof sleeve (52).
5. The grouting reinforcement structure for soft soil layers in karst areas according to claim 1 is characterized in that: A grouting hole (4) is provided in the soft soil layer (12) and in the middle of the transverse hole (3); the upper end of the grouting hole (4) is an open structure, and the bottom is in communication with the lowest transverse hole (3).