Anchor rod and inclined pile composite foundation pit supporting structure
By using a composite foundation pit support structure with anchor rods and inclined piles in the foundation pit project, the coordination of inclined piles and vertical piles is used to solve the problem of foundation pit collapse caused by local anchor failure, and a higher soil body is achieved The bearing capacity and structural safety also reduce construction costs and difficulty.
Patent Information
- Application Number
- CN202323347998.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-08
AI Technical Summary
In existing foundation pit projects, foundation pit collapses caused by local anchor failure are frequent, and existing preventive measures are costly and difficult to construct, and there is a lack of a simple and economical composite foundation pit support structure to prevent anchor failure.
A composite foundation pit support structure with anchor rod and inclined piles, including vertical piles and crown beams. The inclined piles are inclined into the foundation pit, and the anchor rods are anchored between vertical piles. The angle between inclined piles and vertical piles is 15. °-25°, the spacing is 2-2.5 times the diameter of the vertical pile, and the inclination angle of the anchor is 15°-25°, to enhance the soil bearing capacity and structural safety.
Compared with the support method of pile-row anchor rods, the soil volume is increased at the same length, the bearing capacity of the support structure is improved, and the angle and anchor inclination can be increased when the soil layer is poor, thereby enhancing the safety performance of the structure. , and reduce the length of the supporting pile by about 30%, reducing construction costs.
Smart Images
Figure CN222183362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of foundation pit support, in particular to a composite foundation pit support structure of anchor rods and inclined piles. Background Art
[0002] Pile-anchor support is a common support method in foundation pit engineering. Its main function is to form a two-point force or multi-point force system through the action of soil anchor rods and supporting piles, so as to control soil deformation and reduce pile displacement. However, continuous foundation pit collapse caused by local anchor failure is common, causing very serious losses. Due to the randomness and complexity of foundation pit engineering accidents, the current preventive control measures for preventing the collapse of retaining structures are mainly to strengthen the stiffness of local retaining structures to form blocking units and control the scale of foundation pit collapse. However, this method has high construction cost, increases construction difficulty and prolongs construction period. Therefore, there is an urgent need for a composite foundation pit support structure with simple construction method, low cost and the ability to prevent local anchor failure. Utility Model Content
[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and to provide a composite foundation pit support structure which has a simple construction method, low cost and can prevent local anchor failure.
[0004] In order to achieve the above object, the utility model is implemented through the following technical solutions:
[0005] A composite foundation pit support structure of anchor rods and inclined piles, comprising vertical piles and a crown beam, wherein the vertical piles are continuously and evenly fixedly arranged at the bottom of the crown beam, and the bottom of the crown beam is also fixedly provided with inclined piles arranged alternately with the vertical piles, and the inclined piles are inclined toward the foundation pit; anchor rods inclined in the opposite direction to the inclined piles are evenly anchored on the crown beam, and the anchoring position of the anchor rods on the crown beam is located between the vertical piles; the angle between the inclined piles and the vertical piles is 15°-25°, and the spacing between the inclined piles and the vertical piles is 2-2.5 times the diameter of the vertical piles; the inclination angle of the anchor rod is 15°-25°.
[0006] Compared with the prior art, the utility model has the following beneficial effects:
[0007] Compared with the row pile anchor support method, the utility model can control a larger soil volume in the support structure under the same length, thereby increasing the bearing capacity of the support structure. When the soil layer around the foundation pit is poor during construction, the angle between the vertical pile and the inclined pile can be increased to improve the structural safety performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a structural schematic diagram of the utility model;
[0009] Figure 2 It is a top view of the utility model;
[0010] Figure 3 It is a structural schematic diagram of the utility model in a foundation pit.
[0011] Reference numerals:
[0012] 1-cap beam, 2-vertical pile, 3-inclined pile, 4-anchor head, 5-anchor rod, 6-foundation pit. DETAILED DESCRIPTION
[0013] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0014] like Figures 1 to 3 As shown, a composite foundation pit supporting structure of anchor rods and inclined piles comprises vertical piles 2 and a crown beam 1, wherein the vertical piles 2 are continuously and evenly fixedly arranged at the bottom of the crown beam 1, and the bottom of the crown beam 1 is also fixedly provided with inclined piles 3 alternately arranged with the vertical piles 2, and the inclined piles 3 are inclined toward the foundation pit 6; anchor rods 5 inclined in the opposite direction to the inclined piles 3 are evenly anchored on the crown beam 1, and the anchor rods 5 are located between the vertical piles 2 at the anchoring position of the crown beam 1.
[0015] The distance between the inclined pile 3 and the vertical pile 2 is 2-2.5 times the diameter of the vertical pile 2, the angle between the inclined pile 3 and the vertical pile 2 is 15°-25°, and the inclination angle of the anchor rod 5 is 15°-25°. Figure 3 As shown, when the soil layer around the foundation pit 6 is poor during construction, the angle between the vertical pile 2 and the inclined pile 3, as well as the inclination angle of the anchor rod 5 can be increased within the angle range. After the inclination angles of the anchor rod 5 and the inclined pile 3 are increased, the soil controlled between the inclined pile 3 and the vertical pile 2 is increased, so the bearing capacity is increased, and the horizontal component of the axial force of the inclined pile 3 is increased, which ultimately increases the load sharing of the inclined pile 3 on the anchor rod 5, thereby improving the structural safety performance.
[0016] The construction steps of the utility model are as follows: according to the construction requirements, the overall length of the support piles is designed. Compared with the row pile anchor support method, the utility model can reduce the length of the support piles by about 30%. The vertical piles 2 and the inclined piles 3 are arranged according to the on-site environment. This embodiment adopts a straight and one inclined arrangement, and a water-stop curtain is arranged. When the foundation pit 6 is excavated to 1-1.5m below the surface elevation, the crown beam 1 is constructed, and the anchor rod 5 is driven into the outside of the foundation pit 6 and anchored to the crown beam 1 through the anchor head 4. In this embodiment, the inclination angle of the anchor rod 5 is set to 15°, and the anchor rod 5 is excavated to the design elevation after prestressing. During the construction process, when the soil layer around the foundation pit is good, the vertical piles 2 and the inclined piles 3 can be arranged in a "two straight and one inclined" or "three straight and one inclined" manner after numerical simulation verification, that is, a single inclined pile 3 finally corresponds to multiple anchor rods 5.
[0017] 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 composite foundation pit support structure of anchor rods and inclined piles, comprising vertical piles (2) and cap beams (1), characterized in that: The vertical piles (2) are fixedly arranged continuously and evenly at the bottom of the crown beam (1); the bottom of the crown beam (1) is also fixedly provided with inclined piles (3) arranged alternately with the vertical piles (2); the inclined piles (3) are inclined toward the foundation pit (6); anchor rods (5) inclined in the opposite direction to the inclined piles (3) are evenly anchored on the crown beam (1); the anchor rods (5) are located between the vertical piles (2) at the anchoring position of the crown beam (1); the angle between the inclined piles (3) and the vertical piles (2) is 15°-25°; the distance between the inclined piles (3) and the vertical piles (2) is 2-2.5 times the diameter of the vertical piles (2); the inclination angle of the anchor rods (5) is 15°-25°.