A bracing device for a foundation pit

Abstract

The utility model belongs to foundation pit supporting device technical field discloses a kind of inclined strut devices for foundation pit.The inclined strut devices for foundation pit include connecting assembly, support assembly and grouting pipe, connecting assembly includes transverse connecting piece and limit piece, transverse connecting piece is fixedly connected in the top of multiple support vertical girders, limit piece is fixedly connected in transverse connecting piece;Support assembly includes support piece and cover piece, one end of support piece inserts the pit bottom of foundation pit, other end is obliquely connected in limit piece, support piece is equipped with grouting passage and multiple slurry outlet, slurry outlet is communicated with grouting passage, multiple slurry outlet ring is equipped in the surface of support piece located below the bottom of foundation pit, cover piece can be fixedly connected in the top of support piece to block grouting passage;Grouting pipe can be connected in limit piece in support piece, and passage in grouting pipe is communicated with grouting passage.The inclined strut devices for foundation pit provided by the utility model can effectively reduce construction cost, and reduce support occupied area.

Description

Technical Field

[0001] This utility model relates to the technical field of foundation pit support devices, and in particular to a diagonal bracing device for foundation pits. Background Technology

[0002] With the continuous advancement of urbanization in my country, the urbanization rate has reached 60%-70%. Urban areas are densely populated with interconnected municipal roads, underground pipelines, and various buildings. Therefore, the construction space for new projects is severely constrained by the surrounding environment, leading to a trend of "deep, large, and close-proximity" foundation pit engineering. The reliability of the foundation pit support structure directly affects construction safety and the stability of the surrounding environment.

[0003] Currently, foundation pit support mainly adopts two forms: horizontal bracing and diagonal bracing. Among them, the retaining structure combined with the foundation pit horizontal bracing structure requires a large number of bracing components in large-area foundation pits, increasing engineering costs and limiting its application scenarios, making it difficult to apply to scenarios where there is a height difference between the two sides of the foundation pit. On the other hand, conventional capping beams combined with grouting steel pipe diagonal bracing require occupying space outside the foundation pit boundary during construction, which can easily cause interference to the surrounding environment. Utility Model Content

[0004] The purpose of this invention is to provide a diagonal bracing device for foundation pits, which reduces construction costs and the area occupied by the support.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A diagonal bracing device for a foundation pit includes multiple supporting vertical beams for supporting the inner wall of the foundation pit. The diagonal bracing device further includes:

[0007] The connecting assembly includes a lateral connector and a limiting member. The lateral connector extends horizontally and is fixedly connected to the top of the plurality of supporting vertical beams. The limiting member is fixedly connected to the lateral connector and extends perpendicularly to the lateral connector into the interior of the pit.

[0008] The support assembly includes a support member and a cover member. One end of the support member is inserted into the bottom of the pit, and the other end is inclinedly connected to the limiting member. The support member has a grouting channel and multiple grout outlet holes. The grouting channel extends along the length of the support member, and the grout outlet holes communicate with the grouting channel. The multiple grout outlet holes are arranged around the surface of the support member located below the bottom of the pit. The cover member can be fixedly connected to the top of the support member to block the grouting channel.

[0009] The grouting pipe is able to pass through the limiting member and connect to the support member, and the channel inside the grouting pipe is connected to the grouting channel.

[0010] The aforementioned diagonal bracing device for foundation pits includes a bottom cover, which is fixedly connected to the bottom end of the support member. The bottom cover is conical.

[0011] The aforementioned diagonal bracing device for foundation pits includes multiple sets of grout outlet holes, with each set of grout outlet holes arranged in a ring around the support member, and the multiple sets of grout outlet holes spaced apart along the length of the support member.

[0012] The aforementioned diagonal bracing device for foundation pits further includes a baffle plate, which is fixedly connected to the support member. A sealing member is provided between the baffle plate and the support member, and the sealing member is configured to block the slurry outlet hole.

[0013] The aforementioned diagonal bracing device for the foundation pit includes a shielding plate comprising two steel plates. The ends of the two steel plates that are close to each other are fixedly connected, and the ends of the two steel plates that are far apart from each other are respectively fixedly connected to the support member. The shielding plate and the support member form a triangular shielding space, and the shielding space is provided with the sealing member.

[0014] The aforementioned diagonal bracing device for the foundation pit has an angle of 40°-60° between the support member and the bottom surface of the foundation pit.

[0015] The aforementioned diagonal bracing device for foundation pits includes two grouting pipes. The cross-section of the support member is circular. The two grouting pipes are spaced apart along the radial direction of the support member. The grouting pipes extend into the support member by 100-200mm.

[0016] The aforementioned foundation pit uses a diagonal bracing device, wherein the diameter of the grout outlet hole is 6-10mm.

[0017] The aforementioned diagonal bracing device for foundation pits includes a transverse connector that is an integrally formed concrete component with a first reinforcing rib inside, and a limiting component that is an integrally formed concrete component with a second reinforcing rib inside.

[0018] The aforementioned diagonal bracing device for foundation pits includes an anchor bar, which is fixedly connected to the support member and can be inserted into the support member and overlapped with the second reinforcing bar.

[0019] The beneficial effects of this utility model are:

[0020] The inclined bracing device for foundation pits provided by this utility model includes a connecting assembly and a supporting assembly. The connecting assembly includes a transverse connector and a limiting member. The transverse connector is fixedly connected to the top of the supporting vertical beam, and the limiting member is connected to the transverse connector. One end of the supporting member is inserted into the foundation pit, and the other end is connected to the limiting member, supporting the limiting member and thus the transverse connector, so that the supporting vertical beam supports the pit wall. Only one supporting member and one transverse connector are needed to stably support the pit wall, reducing the number of supporting members and lowering construction costs. Simultaneously, the supporting member is inserted into the bottom of the foundation pit, reducing space occupation, avoiding impact on the external environment of the foundation pit, and ensuring smooth construction. The inclined bracing device for foundation pits provided by this utility model can effectively reduce construction costs and the area occupied by the supporting members. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the cooperation between the diagonal bracing device for the foundation pit and the supporting vertical beam provided in this embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram showing the fit between the support member, the cover member, and the anchor bar provided in this embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the fit between the support member and the bottom cover provided in this embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram showing the cooperation of the support member, the shielding plate, and the sealing member provided in the embodiment of this utility model.

[0025] In the picture:

[0026] 1. Connecting components; 11. Lateral connectors; 12. Limiting components;

[0027] 2. Support assembly; 21. Support component; 211. Grout outlet; 22. Cover; 23. Bottom cover; 24. Anchor bar;

[0028] 3. Grouting pipe;

[0029] 4. Blindfold;

[0030] 5. Sealing components;

[0031] 100. Supporting vertical beams. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] The inclined bracing device for foundation pits provided by this utility model reduces the number of supporting parts, lowers construction costs, reduces the area occupied by the supports, and avoids affecting the external environment of the foundation pit.

[0037] like Figures 1-4 As shown, the diagonal bracing device for the foundation pit includes multiple supporting vertical beams 100, which are used to support the inner wall of the foundation pit. The device also includes a connecting assembly 1, a supporting assembly 2, and a grouting pipe 3. The connecting assembly 1 includes a transverse connector 11 and a limiting member 12. The transverse connector 11 extends horizontally and is fixedly connected to the top of the multiple supporting vertical beams 100. The limiting member 12 is fixedly connected to the transverse connector 11 and extends perpendicularly to the transverse connector 11 into the foundation pit. The supporting assembly 2 includes a supporting member 21 and a sealing member 22. One end of the support member 21 is inserted into the bottom of the foundation pit, and the other end is inclinedly connected to the limiting member 12. The support member 21 has a grouting channel and multiple grout outlet holes 211. The grouting channel extends along the length of the support member 21, and the grout outlet holes 211 are connected to the grouting channel. Multiple grout outlet holes 211 are arranged around the surface of the support member 21 located below the bottom of the foundation pit. The capping member 22 can be fixedly connected to the top of the support member 21 to block the grouting channel. The grouting pipe 3 can be inserted through the limiting member 12 and connected to the support member 21, and the channel inside the grouting pipe 3 is connected to the grouting channel.

[0038] The foundation pit bracing device provided by this utility model includes a connecting component 1 and a supporting component 2. The connecting component 1 includes a transverse connecting member 11 and a limiting member 12. The transverse connecting member 11 is fixedly connected to the top of the supporting vertical beam 100, and the limiting member 12 is connected to the transverse connecting member 11. One end of the supporting member 21 is inserted into the foundation pit, and the other end is connected to the limiting member 12, which supports the limiting member 12 and thus the transverse connecting member 11, so that the supporting vertical beam 100 supports the pit wall. Only one supporting member 21 and one transverse connecting member 11 are needed to stably support the pit wall, reducing the number of supporting members 21 and lowering construction costs. At the same time, the supporting member 21 is inserted into the bottom of the foundation pit, reducing space occupation, avoiding impact on the external environment of the foundation pit, and ensuring smooth construction. The foundation pit bracing device provided by this utility model can effectively reduce construction costs and reduce the area occupied by the supporting component.

[0039] The transverse support member 21 is welded and fixed to the support vertical beam 100, or it can be cast and fixed to the support vertical beam 100. In this embodiment, the transverse connector 11 is an integrally formed concrete component with a first reinforcing rib inside, and the limiting member 12 is an integrally formed concrete component with a second reinforcing rib inside. The casting construction is convenient and has high strength.

[0040] During construction, a casting mold is connected to the supporting vertical beam 100, and the first reinforcing rib is tied to the supporting vertical beam 100 to improve the strength of the cement after molding. Cement is poured into the casting mold, which surrounds the supporting vertical beam 100, so that the cast transverse connecting piece 11 is fixedly connected to the supporting vertical beam 100. The casting mold is fixed to the transverse connecting piece 11 to cast the limiting piece 12, and the second reinforcing rib is inserted to improve the strength of the cement after molding. After casting, the limiting piece 12, the transverse connecting piece 11, and the supporting vertical beam 100 are fixedly connected. The supporting piece 21 supports the limiting piece 12, which can ensure the supporting effect of the supporting vertical beam 100 on the pit wall, reduce the number of supporting parts, and reduce construction costs.

[0041] Specifically, the first and second reinforcing bars are made of existing steel bars, which are easy to obtain and reduce construction costs.

[0042] This embodiment does not specifically limit the position of the limiting member 12 fixed to the horizontal support member 21. For example, the limiting member 12 is fixed at the center position of the horizontal support member 21. When the support member 21 supports the limiting member 12, it avoids the horizontal connecting member 11 from being displaced in the vertical direction due to the different weights of the horizontal connecting members 11 on both sides of the support member 21, thereby improving the support effect.

[0043] Furthermore, the support component 2 also includes an anchor bar 24, which is fixedly connected to the support member 21. The anchor bar 24 can be inserted into the support member 21 and overlap with the second reinforcing bar. After casting, the anchor bar 24 and the second reinforcing bar form a rigid structure, which prevents the support member 21 from separating from the limiting member 12 during the support process and improves the support stability.

[0044] For example, the anchor bar 24 is welded and fixed to the support member 21, which is convenient to weld and has high connection strength.

[0045] To facilitate the insertion of the support member 21 into the bottom of the pit, in this embodiment, the participant... Figure 3 The support assembly 2 also includes a bottom cover 23, which is fixedly connected to the bottom end of the support member 21. The bottom cover 23 is conical. The conical bottom cover 23 has a small contact area with the bottom of the pit and a large pressure, which makes it easier for the support member 21 to be inserted into the bottom of the pit.

[0046] The bottom cover 23 can be fixed to the support member 21 by bolts or by welding. For example, the bottom cover 23 is fixed to the support member 21 by welding, which is convenient and has high connection strength.

[0047] In this embodiment, the angle between the support member 21 and the bottom surface of the foundation pit is 40°-60°. The larger angle between the support member 21 and the bottom surface of the foundation pit can reduce the horizontal distance of the support member 21 inserted into the bottom of the foundation pit and reduce the horizontal space occupied by the support member 21, so as to prevent the support member 21 from occupying the space outside the foundation pit boundary line and avoid affecting the surrounding environment of the foundation pit.

[0048] The grout outlet 211 is used to discharge cement from the grouting channel, allowing the cement to reinforce the soil below the foundation pit, preventing the support member 21 from shifting and improving the stability of the support. Optionally, the diameter of the grout outlet 211 is 6-10mm, which can reduce the risk of granular materials clogging the grout outlet 211, ensuring that the cement in the grouting channel is discharged smoothly and meeting the filling requirements of the soil below the foundation pit. Specifically, the diameter of the grout outlet 211 is 8mm.

[0049] Furthermore, multiple sets of grout outlet holes 211 are provided, with each set of grout outlet holes 211 arranged around the support member 21. The multiple sets of grout outlet holes 211 are spaced apart along the length of the support member 21. The multiple sets of grout outlet holes 211 discharge cement evenly, so that the cement can make uniform contact with the soil around the support member 21, thereby improving the reinforcement effect on the soil.

[0050] In other embodiments, the slurry outlet holes 211 may also be arranged in a quincunx pattern along the length of the support member 21.

[0051] To prevent soil from clogging the grout outlet 211 during the insertion of the support member 21 into the soil below the foundation pit. In this embodiment, see... Figure 1 and Figure 4The diagonal bracing device for the foundation pit also includes a shielding plate 4, which is fixedly connected to the support member 21. A sealing member 5 is provided between the shielding plate 4 and the support member 21, and the sealing member 5 is configured to seal the grout outlet hole 211. The shielding plate 4 can loosen the soil, reduce soil pressure, and prevent soil from clogging the grout outlet hole 211. At the same time, the sealing member 5 pre-seals the grout outlet hole 211 to prevent soil from entering the grouting channel.

[0052] Optionally, the sealing component 5 is made of expanding foam. Before the cement is injected, the sealing component 5 is bonded to the outer wall of the support component 21 to seal the grout outlet 211. The pressure of the soil under the foundation pit is relatively small, so the sealing component 5 will not be squeezed out of the grout outlet 211 and enter the grouting channel. After the cement is injected, the pressure of the cement in the grouting channel is relatively large, which will squeeze the sealing component 5 away from the support component 21, and then the cement will flow into the soil from the grout outlet 211 to reinforce the soil.

[0053] Furthermore, the shielding plate 4 includes two steel plates. The ends of the two steel plates that are close to each other are fixedly connected, and the ends of the two steel plates that are far apart from each other are respectively fixedly connected to the support member 21. The shielding plate 4 and the support member 21 form a triangular shielding space, and a sealing member 5 is provided in the shielding space. The shielding plate 4 can protect the sealing member 5, reduce the pressure of the soil on the sealing member 5, and prevent soil from entering the grouting channel and blocking the grout outlet 211.

[0054] In this embodiment, the diagonal bracing device for the foundation pit includes two grouting pipes 3. The cross-section of the support member 21 is circular, and the two grouting pipes 3 are spaced apart along the radial direction of the support member 21. The grouting pipes 3 extend into the support member 21 by 100-200mm. The circular support member 21 has good radial force uniformity, which allows the additional force generated during the grouting process to be distributed and transmitted along the circumference, reducing local stress concentration and improving service life.

[0055] Specifically, the grouting pipe 3 extends 180 mm into the support member 21.

[0056] The steps for using the diagonal bracing device for foundation pits provided by this utility model are as follows:

[0057] S1: Use a hydraulic vibratory hammer to drive the support 21 into the soil;

[0058] S2: Weld anchor bars 24 and capping members 22 to the end of support member 21 away from the soil, and drill holes in capping member 22 to insert grouting pipe 3;

[0059] S3: Arrange the casting mold, the first reinforcing rib and the second reinforcing rib, and overlap the second reinforcing rib and the anchor rib 24 so that the transverse connecting part 11, the supporting part 21 and the limiting part 12 after casting form a rigid whole.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A diagonal bracing device for a foundation pit, comprising a plurality of supporting vertical beams (100), wherein the supporting vertical beams (100) are used to support the inner wall of the foundation pit, characterized in that, The diagonal bracing device for the foundation pit also includes: The connecting component (1) includes a transverse connector (11) and a limiting member (12). The transverse connector (11) extends horizontally and is fixedly connected to the top of the plurality of supporting vertical beams (100). The limiting member (12) is fixedly connected to the transverse connector (11) and extends perpendicularly to the transverse connector (11) into the interior of the pit. The support assembly (2) includes a support member (21) and a cover member (22). One end of the support member (21) is inserted into the bottom of the foundation pit, and the other end is inclinedly connected to the limiting member (12). The support member (21) has a grouting channel and a plurality of grout outlet holes (211). The grouting channel extends along the length of the support member (21), and the grout outlet holes (211) communicate with the grouting channel. The plurality of grout outlet holes (211) are arranged around the surface of the support member (21) located below the bottom of the foundation pit. The cover member (22) can be fixedly connected to the top of the support member (21) to block the grouting channel. Grouting pipe (3), which can be inserted through the limiting member (12) and connected to the support member (21), and the channel inside the grouting pipe (3) is connected to the grouting channel.

2. The diagonal bracing device for foundation pits according to claim 1, characterized in that, The support assembly (2) also includes a bottom cover (23), which is fixedly connected to the bottom end of the support member (21). The bottom cover (23) is conical.

3. The diagonal bracing device for foundation pits according to claim 1, characterized in that, The slurry outlet (211) is provided in multiple sets, and each set of the slurry outlet (211) is arranged around the support member (21). The multiple sets of slurry outlet (211) are arranged at intervals along the length direction of the support member (21).

4. The diagonal bracing device for foundation pits according to claim 1, characterized in that, The foundation pit bracing device also includes a shielding plate (4), which is fixedly connected to the support member (21). A sealing member (5) is provided between the shielding plate (4) and the support member (21), and the sealing member (5) is configured to block the slurry outlet (211).

5. The diagonal bracing device for foundation pits according to claim 4, characterized in that, The shielding plate (4) includes two steel plates. The two steel plates are fixedly connected at their close ends and respectively fixedly connected at their far ends to the support member (21). The shielding plate (4) and the support member (21) form a triangular shielding space, and the shielding space is provided with the sealing member (5).

6. The diagonal bracing device for foundation pits according to claim 1, characterized in that, The angle between the support member (21) and the bottom surface of the foundation pit is 40°-60°.

7. The diagonal bracing device for foundation pits according to claim 1, characterized in that, The foundation pit diagonal bracing device includes two grouting pipes (3), the cross-section of the support member (21) is circular, the two grouting pipes (3) are spaced apart along the radial direction of the support member (21), and the grouting pipes (3) extend into the support member (21) by 100-200mm.

8. The diagonal bracing device for foundation pits according to claim 1, characterized in that, The diameter of the slurry outlet (211) is 6-10 mm.

9. The diagonal bracing device for foundation pits according to any one of claims 1-8, characterized in that, The transverse connector (11) is an integrally formed concrete component with a first reinforcing rib inside, and the limiting component (12) is an integrally formed concrete component with a second reinforcing rib inside.

10. The diagonal bracing device for foundation pits according to claim 9, characterized in that, The support assembly (2) further includes an anchor bar (24), which is fixedly connected to the support member (21) and can be inserted into the support member (21) and overlapped with the second reinforcing bar.

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