Deep foundation pit supporting pile structure for complex geology

Abstract

The utility model discloses a supporting pile structure of a deep foundation pit in complex geology. The supporting pile structure comprises a plurality of supporting pile units which are transversely arranged and a plurality of supporting pile units which are longitudinally arranged. The support pile units are fixedly connected in sequence; the supporting pile unit comprises a plurality of vertically-arranged supporting piles, and net rod structures supported on the foundation pit wall are installed on the supporting piles. The net rod structure comprises a plurality of transverse protection rods and a plurality of longitudinal protection rods staggered with the transverse protection rods; the mounting distance between the support pile and the net rod structure is adjusted through a distance adjusting structure; the bottoms of the supporting piles are fixedly connected with embedding structures, and the supporting piles are embedded in a foundation pit through the embedding structures. The supporting pile units arranged longitudinally and the supporting pile units arranged transversely are pulled through a plurality of cable-stayed structures. By means of the device structure, the foundation pit with soft soil is effectively and fully supported, and the safety of foundation pit operation is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit support technology, and in particular relates to a support pile structure for deep foundation pits in complex geological conditions. Background Technology

[0002] During construction, such as when building a skyscraper, it is necessary to excavate a foundation pit beforehand. This pit is below ground level and will later serve as the foundation for the entire building. When the foundation pit is excavated to a certain depth, the pit walls are at high risk of landslides.

[0003] Specifically, especially in geologically complex environments, such as those with loose soil and high water content (e.g., coastal areas), once the foundation pit has been excavated to a certain depth, it is necessary to immediately support the pit to prevent landslides from occurring on the pit walls. This could lead to the landslide soil burying the pit and posing a danger to personnel and equipment working inside.

[0004] The current support method mainly adopts the wire mesh support method, which involves attaching steel wire mesh to the foundation pit wall and randomly spraying concrete into the mesh. However, the drawback of this method is that the support force is too small, especially when the foundation pit is deep. In addition, the soil structure is loose, which makes the pit wall very easy to landslide.

[0005] Therefore, in order to increase the support effect, the support pile method is currently used. However, due to the excessive spacing of the support piles, the support effect is not ideal, and there is still a defect of partial collapse and landslide in the foundation pit in the later stage.

[0006] Furthermore, once the support piles are squeezed by the soil layer of the landslide and become loose from their installation location, they will lose their support. Losing support can easily exacerbate the landslide and trigger a chain reaction, causing a large number of support piles to tilt and lose their support function in the event of a landslide.

[0007] In response to this situation, there is an urgent need for a support device that can effectively cope with the above-mentioned geological conditions and provide effective, stable, and safe support to solve the operational risks caused by unstable support. Utility Model Content

[0008] Based on the above background, the purpose of this utility model is to provide a support pile structure for deep foundation pits in complex geological conditions.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A support pile structure for deep foundation pits in complex geological conditions includes several support pile units arranged laterally and several support pile units arranged longitudinally.

[0011] The support pile units are fixedly connected in sequence;

[0012] The support pile unit includes several vertically arranged support piles, and a grid structure that supports the foundation pit wall is installed on the support piles.

[0013] The pole structure includes several horizontal guardrails and several longitudinal guardrails that are staggered with the horizontal guardrails;

[0014] The installation spacing between the support piles and the grid structure is adjusted by a spacing adjustment structure.

[0015] The bottom of the support pile is fixedly connected to an embedded structure, and the support pile is embedded in the foundation pit through the embedded structure.

[0016] The longitudinally arranged support pile units and the transversely arranged support pile units are connected by several inclined tie structures.

[0017] Preferably, the spacing adjustment structure includes an adjustment screw welded to the mesh pole structure;

[0018] The support pile has an installation hole that penetrates the adjusting screw;

[0019] The adjusting screw is threaded with a pair of nuts positioned on the side walls of the support pile.

[0020] Preferably, the support pile units are fixedly connected by a screw sleeve structure.

[0021] Preferably, the screw sleeve structure includes screws that are fixedly connected to the ends of the transverse guard rod;

[0022] The screws are threadedly connected by screw sleeves, which securely connect adjacent screws on both sides.

[0023] Preferably, the embedded structure includes a steel disc base welded to the bottom of the support pile.

[0024] Preferably, the bottom of the steel disc base is welded with a plurality of hook ribs;

[0025] The hook rib includes a vertical rib welded to the steel disc base, and the vertical rib is integrally formed with a hook rib part with a hook.

[0026] Preferably, the inclined structure diagonally supports the two support pile units located at the corner;

[0027] The inclined structure includes a tie rod, the two ends of which are welded to the support piles.

[0028] Preferably, the tie rod is U-shaped.

[0029] Preferably, a plurality of protective plates are welded to the top of each support pile unit;

[0030] The protective plate is anchored at the edge of the pit opening.

[0031] This utility model has the following beneficial effects:

[0032] 1. By combining the support piles and the grid structure, the stability of the support is greatly increased. Even when the soil in the tunnel is soft, the combination of the dense support of the grid structure and the pressure-resistant support of the support piles effectively avoids the defect of tunnel wall landslide.

[0033] 2. During the construction process, pouring holes are pre-drilled at the installation positions of the support piles. After the steel plate base is placed in, concrete is poured on it. Since the hooks and claws are inside the concrete structure layer, their stability can be effectively increased, which solves the defects of reduced support stability caused by the slope of the foundation pit and the tilting of the support piles after bearing pressure.

[0034] 3. Two support pile units located at the corner are diagonally pulled together using a diagonal tie structure. The diagonal tie structure includes diagonal tie rods, with both ends of the tie rods welded to the support piles. By using the diagonal tie method, the support pile units distributed on the four sides of the foundation pit are integrated into a single support structure, thereby improving the support effect. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the dispersed structure in an embodiment of the present utility model;

[0037] in, Figure 1 Only a portion of the support pile units are shown in the image.

[0038] Figure 2 This is a schematic diagram of the support pile unit structure in an embodiment of this utility model;

[0039] Figure 3 This is a schematic diagram of the spacing adjustment structure in an embodiment of the present invention;

[0040] Figure 4 This is an embodiment of the present utility model. Figure 1 A structural diagram from another perspective.

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0045] Example 1

[0046] like Figure 1-4 As shown, a support pile structure for a deep foundation pit in complex geological conditions includes several horizontally arranged support pile units 1 and several vertically arranged support pile units 1. The horizontally arranged support pile units 1 are used to support the horizontal walls of the foundation pit, and similarly, the vertically arranged support pile units 1 are used to support the longitudinal walls of the foundation pit. That is, the support pile units 1 support each side wall of the foundation pit.

[0047] The support pile units 1 are fixedly connected in sequence; during the operation, after supporting one support pile unit 1, another support pile unit 1 is supported, and then the two support pile units 1 are fixedly connected to achieve integrated support, thereby increasing the stability of the support.

[0048] The structure of support pile unit 1 is as follows:

[0049] The support pile unit 1 includes several vertically arranged support piles 14, on which a grid structure supporting the foundation pit wall is installed; the grid structure includes several transverse guard rods 11 and several longitudinal guard rods 12 arranged interlaced with the transverse guard rods 11; the transverse guard rods 11 and the longitudinal guard rods 12 are welded from threaded steel rods.

[0050] Furthermore, the installation spacing between the support piles 14 and the grid structure is adjusted via a spacing adjustment structure. Specifically, the spacing adjustment structure includes an adjusting screw 15 welded to the grid structure; the support piles 14 have mounting holes penetrating the adjusting screw 15. A pair of nuts 151, positioned on the side walls of the support piles 14, are threaded onto the adjusting screw 15. Since the pit walls are not perfectly horizontal, the spacing adjustment mechanism ensures that the grid structure can support the pit walls during the support process.

[0051] The specific method is as follows: after loosening nut 151, push the net pole structure towards the pit wall until it fully contacts the pit wall, and then tighten the nut.

[0052] The dual support effect of the support piles 14 and the grid structure effectively increases the stability of the support. Even when the soil layer in the tunnel is soft, the combination of the dense support of the grid structure and the pressure-resistant support of the support piles 14 effectively avoids the defect of pit wall landslide.

[0053] Since the support piles 14 units 1 are distributed along each side wall of the foundation pit (the foundation pit is mostly a rectangular structure), the two support piles 14 units 1 located at the corner are connected by several inclined tie structures (the inclined tie structures realize the longitudinal arrangement of support piles 14 units 1 and the transverse arrangement of support piles 14 units 1).

[0054] Specifically, the inclined tie structure diagonally supports the two support pile units 14 located at the corner; the inclined tie structure includes a tie rod 2, the two ends of which are welded to the support pile 14. By using the inclined tie method, all the support pile units 14 distributed on the four sides are integrated into a single structure, thereby improving the support effect.

[0055] Example 2

[0056] like Figure 1-4 As shown, in this embodiment, based on the structure of Embodiment 1, the bottom of the aforementioned support pile 14 is fixedly connected to an embedded structure 16, and the support pile 14 is embedded in the foundation pit through the embedded structure 16. The embedded structure 16 increases the strength of the support pile 14. When the foundation pit soil layer (loose soil layer) presses against the grid structure, the support pile 14 bears a larger load, while the embedded structure 16 increases the stability of the support.

[0057] Specifically, the embedded structure 16 includes a steel disc base 161 welded to the bottom of the support pile 14 (with several reinforcing ribs 162 welded between the steel disc base 161 and the support pile 14). Several hook ribs 163 are welded to the bottom of the steel disc base 161; each hook rib 163 includes a vertical rib welded to the steel disc base 161, with the vertical rib integrally formed with hooked sections. During construction, a pouring hole is pre-drilled at the installation location of the support pile 14. After the steel disc base 161 is placed in, concrete is poured on top. Because the hooks of the hook ribs 163 are within the concrete structural layer, their stability is effectively increased, solving the problem of reduced support stability caused by the slope of the foundation pit and the tilting of the support pile 14 under pressure.

[0058] Example 3

[0059] like Figure 1-4 As shown, in this embodiment, based on the structure of Embodiment 2, to facilitate the integrated formation of the support structure by the support units, the aforementioned support pile 14 units 1 are fixedly connected by a screw sleeve structure. The screw sleeve structure includes screws 13 respectively fixedly connected to the ends of the transverse guard rods 11; screw sleeves 131 are threadedly connected between the screws 13, and the screw sleeves 131 threadedly fix adjacent screws 13 on both sides. The screws 13 on both sides of the support unit are fastened by the screw sleeves 131 (which have threaded cavities inside), achieving integration.

[0060] Example 4

[0061] like Figure 1-4 As shown, in this embodiment, based on the structure of embodiment 3, several protective plates 3 are welded to the top of the support pile 14 unit 1; the protective plates 3 are anchored to the edge of the pit opening. The protective plates 3 are L-shaped and welded to the transverse guard rod 11 located at the top. According to existing methods, through-hole structures are opened on the protective plates 3. According to existing methods, anchor rods are driven into the through-holes and anchored to the top of the pit, thus utilizing the protective plates 3 to support the pit opening and further reducing the technical defects of pit wall landslides.

[0062] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A deep foundation pit support pile structure in complex geological conditions, characterized in that, It includes several horizontally arranged support pile units and several vertically arranged support pile units; The support pile units are fixedly connected in sequence; The support pile unit includes several vertically arranged support piles, and a grid structure that supports the foundation pit wall is installed on the support piles. The pole structure includes several horizontal guardrails and several longitudinal guardrails that are staggered with the horizontal guardrails; The installation spacing between the support piles and the grid structure is adjusted by a spacing adjustment structure. The bottom of the support pile is fixedly connected to an embedded structure, and the support pile is embedded in the foundation pit through the embedded structure. The longitudinally arranged support pile units and the transversely arranged support pile units are connected by several inclined tie structures.

2. The deep foundation pit support pile structure in complex geological conditions according to claim 1, characterized in that, The spacing adjustment structure includes an adjustment screw welded to the pole structure; The support pile has an installation hole that penetrates the adjusting screw; The adjusting screw is threaded with a pair of nuts positioned on the side walls of the support pile.

3. The deep foundation pit support pile structure in complex geological conditions according to claim 1, characterized in that, The support pile units are fixedly connected by a screw sleeve structure.

4. The deep foundation pit support pile structure in complex geological conditions according to claim 3, characterized in that, The screw sleeve structure includes screws that are fixedly connected to the ends of the transverse guard rods; The screws are threadedly connected by screw sleeves, which securely connect adjacent screws on both sides.

5. The deep foundation pit support pile structure in complex geological conditions according to claim 1, characterized in that, The embedded structure includes a steel disc base welded to the bottom of the support pile.

6. The deep foundation pit support pile structure in complex geological conditions according to claim 5, characterized in that, The bottom of the steel disc base is welded with several hook ribs; The hook rib includes a vertical rib welded to the steel disc base, and the vertical rib is integrally formed with a hook rib part with a hook.

7. The deep foundation pit support pile structure in complex geological conditions according to claim 1, characterized in that, The inclined structure diagonally pulls the two support pile units located at the corner; The inclined structure includes inclined tie rods, the two ends of which are welded to the support piles.

8. The deep foundation pit support pile structure in complex geological conditions according to claim 7, characterized in that, The tie rod is U-shaped.

9. The deep foundation pit support pile structure in complex geological conditions according to claim 1, characterized in that, The top of each support pile unit is welded with several protective plates; The protective plate is anchored at the edge of the pit opening.

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