Fabricated retaining structure for deep foundation pit

Abstract

The utility model relates to the field of deep foundation pit supporting and aims to provide an assembly type supporting and retaining structure for a deep foundation pit, which comprises a side slope. The slide-resistant piles are buried in the side slope; the retaining wall is inserted into the front side of the slope; wherein the multiple anti-slide piles are arranged at intervals in the left-right direction, a top beam extending in the left-right direction is erected on the top of each anti-slide pile, and connecting beams corresponding to the anti-slide piles in a one-to-one mode are connected between the top beams and the retaining wall; a plurality of anchor rods are arranged on the slide-resistant pile in a penetrating mode, and the rear ends of the anchor rods extend out of the rear side of the slide-resistant pile and are anchored in the side slope. The structure is high in integrity and rapid in construction, and has good bearing capacity and structural stability.

Description

Technical Field

[0001] The utility model relates to the field of deep foundation pit support, in particular to an assembled retaining structure for a deep foundation pit. Background Art

[0002] A deep foundation pit refers to an excavation depth exceeding 5 meters, with more than three basement floors, or a project with a depth of less than 5 meters but complex geological conditions, surrounding environment, and underground pipelines. Currently, the support technologies used to improve the overall stability of deep foundation pits mainly include anti-slip piles, double-row pile support, and gravity retaining walls. However, the existing double-row piles and gravity retaining walls are limited in their role in supporting the foundation pit by conditions such as the site, pit size, and foundation, and cannot fully meet construction requirements. Therefore, in an environment with increasingly scarce soil resources, anti-slip piles have become the preferred support method for limited construction sites.

[0003] Anti-slip piles have advantages in construction such as simple technology and low cost, but they also have some shortcomings, such as poor bending resistance and insufficient ability to control pile top displacement. In complex construction environments, a single anti-slip pile support structure also has the defects of weak bearing capacity and poor integrity, making it difficult to play an effective supporting role. Utility Model Content

[0004] The purpose of the utility model is to provide an assembled retaining structure for a deep foundation pit, which has strong structural integrity, fast construction, good bearing capacity and structural stability.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An assembled retaining structure for a deep foundation pit, comprising:

[0007] slope;

[0008] Anti-slip piles, buried inside the slope;

[0009] Retaining wall, inserted in front of the slope;

[0010] There are a plurality of anti-slip piles, which are spaced apart from each other. A crown beam extending left and right is mounted on the top of each anti-slip pile. Connecting beams corresponding to each anti-slip pile are connected between the crown beam and the retaining wall.

[0011] A plurality of anchor rods are also provided on the anti-slip piles, and the rear ends of the anchor rods extend out of the rear side of the anti-slip piles and are anchored in the slope.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] 1. By installing cap beams and coupling beams, each anti-slide pile and retaining wall form a synergistic load-bearing structure, effectively enhancing the anti-slide pile's bending resistance while also reducing pile top displacement, further improving the overall bearing capacity and stability of the retaining structure. Furthermore, by installing anchor rods, the retaining structure is further tied to the soil, improving its pullout resistance and significantly enhancing the stability and safety of the foundation pit retaining structure.

[0014] 2. Through the cooperation of the retaining wall and the drainage holes, when it rains, the rainwater in the slope can penetrate into the foundation pit through the drainage holes, effectively avoiding the slope absorbing water and increasing weight after rainfall, thereby further exerting lateral pressure on the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional schematic diagram of an embodiment of an assembled retaining structure for a deep foundation pit according to the present invention;

[0016] Figure 2 This is a structural schematic diagram of an embodiment of an assembled retaining structure for a deep foundation pit according to the utility model;

[0017] Figure 3 yes Figure 2 Schematic top view of

[0018] Figure 4 It is a structural schematic diagram of the retaining wall of the utility model.

[0019] Explanation of the numbers: 1 slope, 2 anti-slide piles, 3 retaining wall, 4 crown beam, 5 connecting beam, 6 anchor rod, 7 drainage hole. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0021] like Figure 1-4 The figure shows an embodiment schematic diagram of an assembled retaining structure for a deep foundation pit provided by the present invention.

[0022] An assembled retaining structure for a deep foundation pit, comprising:

[0023] Slope 1;

[0024] Anti-slide piles 2, buried inside the slope 1;

[0025] The retaining wall 3 is inserted in front of the slope 1;

[0026] There are a plurality of anti-slip piles 2, which are spaced apart from each other. A crown beam 4 extending left and right is mounted on the top of each anti-slip pile 2. Connecting beams 5 corresponding to each anti-slip pile 2 are connected between the crown beam 4 and the retaining wall 3.

[0027] A plurality of anchor rods 6 are further provided on the anti-slip pile 2 , and the rear ends of the anchor rods 6 extend out of the rear side of the anti-slip pile 2 and are anchored in the slope 1 .

[0028] The retaining wall 3, the cap beam 4 and the connecting beam 5 are preferably precast concrete components.

[0029] The bottom height of the retaining wall 3 should be lower than the bottom side height of the slope 1, and preferably the bottom height of the retaining wall 3 is at least 1 meter lower than the bottom side height of the slope 1 to ensure the overall stability of the retaining structure.

[0030] The anchor rod 6 is a prestressed steel anchor rod. The surface of the anchor rod 6 is provided with threads to enhance the bonding between the anchor rod 6 and the soil. The surface of the anchor rod 6 is also coated with an anti-corrosion material.

[0031] The rear side of the retaining wall 3 is provided with a forward recessed accommodation space corresponding to each connecting beam 5 , and the front end of the connecting beam 5 extends into the accommodation space.

[0032] The retaining wall 3 is provided with a plurality of drainage holes 7 arranged in a rectangular array. The plurality of drainage holes 7 are all located at the lower portion of the retaining wall 3. The drainage holes 7 are used to discharge rainwater absorbed in the slope 1 into the foundation pit.

[0033] A water diversion ditch is also provided on the front side of the retaining wall 3. The water diversion ditch is used to receive rainwater flowing out through the drainage hole 7. The water diversion ditch should be connected to the water collection well in the foundation pit.

[0034] The drainage hole 7 is preferably a square drainage hole with a side length of 2 cm.

[0035] The anti-slide pile 2 is a prestressed component with a rearward arch in the middle portion, so as to increase the ability of the anti-slide pile 2 to resist the lateral pressure of the slope 1.

[0036] The retaining wall 3 is inserted obliquely, with its upper end inclined toward the side of the slope 1, and the top surface height of the retaining wall 3 is not lower than the top surface height of the slope 1.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembled retaining structure for a deep foundation pit, characterized in that: It includes: Slope (1); Anti-slip piles (2), buried inside the slope (1); A retaining wall (3) is inserted in front of the slope (1); The anti-slip piles (2) are provided in a plurality and are arranged at intervals on the left and right. A crown beam (4) extending left and right is provided on the top of each anti-slip pile (2). Connecting beams (5) corresponding to each anti-slip pile (2) are connected between the crown beam (4) and the retaining wall (3). A plurality of anchor rods (6) are also provided on the anti-slip pile (2), and the rear ends of the anchor rods (6) extend out of the rear side of the anti-slip pile (2) and are anchored in the slope (1).

2. The assembled retaining structure for deep foundation pit according to claim 1, characterized in that: The rear side of the retaining wall (3) is provided with a forward-sunken accommodation space corresponding to each connecting beam (5), and the front end of the connecting beam (5) extends into the accommodation space.

3. The assembled retaining structure for deep foundation pit according to claim 1, characterized in that: The retaining wall (3) is provided with a plurality of drainage holes (7) arranged in a rectangular array.

4. The assembled retaining structure for a deep foundation pit according to claim 1, characterized in that: The anti-sliding pile (2) is a prestressed member with a rearward arch in the middle.

5. The assembled retaining structure for deep foundation pit according to claim 1, characterized in that: The retaining wall (3) is inserted obliquely, with its upper end inclined toward one side of the slope (1), and the top surface height of the retaining wall (3) is not lower than the top surface height of the slope (1).

Images