Novel connecting joint of foundation pit supporting I-shaped steel waist beam

Abstract

The utility model relates to the technical field of foundation pit supporting I-shaped steel waist beams, and discloses a novel connecting node of a foundation pit supporting I-shaped steel waist beam, which comprises a wall connecting node structure and a right-angle node structure which are arranged at the end part of an I-shaped steel main body, and the wall connecting node structure is connected with a foundation pit wall body through a pre-stressed anchor cable; the right-angle node structure is arranged at the right-angle corner of the foundation pit wall body; according to the wall-connecting joint structure, the two pieces of I-shaped steel are rapidly connected through the first connecting piece, the I-shaped steel is fixed through the first fixing screw rod, the limiting plate is installed on the first connecting piece through the sliding block to support the I-shaped steel, the limiting plate can improve the strength of the I-shaped steel, and the clamping block and the compression spring are matched to fix the limiting plate; the I-shaped steel waist beam can be quickly connected and mounted, the welding process is reduced, and the stability of the I-shaped steel waist beam is improved; the problem that according to an existing I-shaped steel waist beam connecting structure, an I-shaped steel waist beam cannot be conveniently, rapidly and stably installed is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of I-beam waist beams for foundation pit support, and in particular relates to a novel connection node of an I-beam waist beam for foundation pit support. Background Art

[0002] Foundation pit support is a measure of support, reinforcement and protection for the side walls and surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. It is suitable for open areas around and no important buildings around. However, in deep foundation pits or with surrounding structures, for safety and construction considerations, the foundation pit deformation is required to be small to avoid the instability of the foundation pit soil. For this kind of foundation pit situation, I-beam waist beams or concrete beams of foundation pit support are generally used to apply prestress to avoid large deformation of the foundation pit. As a reusable and high-turnover support structure, I-beam waist beams are widely used in foundation pit support.

[0003] At present, the deep foundation pit support forms of housing construction and subway projects all use I-beam waist beams plus prestressed anchor cables. The length of I-beams in the current market is generally 12m. During the on-site construction of deep foundation pit support, due to the influence of the plane size and linearity of the deep foundation pit, the I-beam waist beam has multiple joints along the horizontal direction of the foundation pit support surface. The I-beam waist beams are mostly connected by electric welding machines to weld the joints together; but due to:

[0004] In the process of welding the joints together with an electric welder, it is easy to be affected by factors such as angles, resulting in loose welding of some welds and possible welding leaks, which leads to poor overall connectivity of the I-beam waist beam; in addition, since the I-beam waist beam is located at a higher position in the foundation pit, construction workers are required to weld at a higher position, which leads to a higher risk factor for workers during operation and poses a safety hazard; and the connection effect of the I-beam waist beam connection using traditional welding connection methods is poor, which makes it inconvenient to quickly and stably install the I-beam waist beam, reducing the installation and use effect of the I-beam waist beam.

[0005] Therefore, the utility model proposes a new type of connection node of the I-beam waist beam for foundation pit support which is easy to assemble and install, so as to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a new connection node for an I-beam waist beam for foundation pit support, which has the advantages of quickly connecting and installing the I-beam waist beam and improving the stability of the I-beam waist beam, thereby solving the problem of the inconvenience of quickly and stably installing the I-beam waist beam in the existing I-beam waist beam.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned purpose of quickly connecting and installing the I-beam waist beam, the utility model provides the following technical solution: a new connection node of the I-beam waist beam for foundation pit support.

[0010] As a preferred solution of the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: the connection node is arranged on the foundation pit wall and is adapted to the I-beam body arranged on the inner wall of the foundation pit wall, and is characterized in that it includes a wall connection node structure and a right-angle node structure arranged at the end of the I-beam body, the wall connection node structure is connected to the foundation pit wall through a prestressed anchor cable, and is adapted to two adjacent I-beam bodies at the same horizontal height; the right-angle node structure is arranged at the right-angle corner of the foundation pit wall and is adapted to the I-beam body;

[0011] Based on the above technical features: by setting a wall connection node structure, when connecting the I-beam waist beam, the first connecting piece clamps one end of the two I-beams to quickly connect them, the first fixing screw can fix the first connecting piece and the I-beam, the limit plate is installed on the first connecting piece through a slider to stably support the I-beam, the limit plate is installed at the upper and lower ends of the I-beam to improve the strength of the I-beam, the clamping block cooperates with the compression spring to fix the limit plate, the limit block can improve the limiting effect of the limit plate on the I-beam, the prestressed anchor cable cooperates with the support plate to apply anchoring force to the I-beam, and then the I-beam is reinforced by the limit bolt and the fixing plate, so that the I-beam waist beam can be quickly connected and installed. The second connecting piece is arranged between two groups of I-beam waist beams to connect the two groups of I-beam waist beams. The second connecting piece cooperates with the second fixing screw to fasten the I-beam waist beam through the connecting plate. The clamping plates at the upper and lower ends of the second connecting piece are L-shaped, which can limit the two groups of I-beam waist beams. The limiting rod can limit and fix them, and the I-beam waist beam can be quickly installed and fixed, thereby improving the strength of the I-beam waist beam. The welding process and the brittleness of the welding structure can be effectively reduced, and the convenience of the mechanical connection structure during assembly and the disassembly and turnover after use are ensured.

[0012] As a preferred solution of the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: the wall connection node structure includes a first connecting piece clamped on the outer side of the middle waist plate of two adjacent I-beam bodies, and both ends of the top of the first connecting piece are provided with evenly distributed first fixing screws, one end of the first fixing screw sequentially penetrates the first connecting piece and the I-beam body, and a nut is threadedly connected at the other end of the first fixing screw;

[0013] Based on the above technical features: two adjacent first connecting members are connected by a first fixing screw, thereby realizing the connection of adjacent I-beam bodies.

[0014] As a preferred solution of the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: the wall connection node structure also includes limit plates slidably connected to both sides of the first connecting member, the limit plates are adapted to the flange plates at both ends of the I-beam body, and a slider is provided at the bottom end of the limit plate, the slider is slidably connected to the slide groove provided on the first connecting member, and a clamping block is slidably connected to the inner wall of the slide groove on the first connecting member, one end of the clamping block is provided with two compression springs, and the other end of the clamping block passes through the side wall of the slide groove on the first connecting member and extends into the slider;

[0015] Based on the above technical features: by inserting the slider into the slide groove on the first connecting member, the installation of limit plates of different specifications can be achieved during installation to match the fixing requirements of the flange plates at both ends of different models of I-beam bodies; at the same time, in the process of installing the limit plates, the slider is squeezed on the arc surface of the block to squeeze the block, so that the compression spring is compressed, and after the installation is completed, the block pops up again under the action of the compression spring, which effectively ensures the limiting effect of the slider after installation and ensures the stability of the connection structure.

[0016] As a preferred solution for the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: both ends of the inner wall of the limit plate are provided with limit blocks;

[0017] Based on the above technical features: through the setting of the limit block, the limit block and the flange plates at both ends of the I-beam body can be tightly pressed to position the I-beam body during use.

[0018] As a preferred solution of the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: a support plate is also provided on one side of the I-beam body, and the support plate is connected to the prestressed anchor cable;

[0019] Based on the above technical features: through the coordinated use of support plates and prestressed anchor cables, the I-beam body can be fixed on the outside of the foundation pit wall, effectively ensuring the integrity of the I-beam body and the foundation pit wall after installation, as well as the supporting effect of the I-beam body on the foundation pit wall. At the same time, the structure adopts mechanical connection, which can effectively reduce the brittleness of the welding process and the welded structure, ensuring the convenience of the mechanical connection structure during assembly and the disassembly and turnover after use.

[0020] As a preferred solution for the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: two fixing plates are slidably connected at both ends of the support plate, the fixing plates are clamped and connected with the I-beam body, and the limiting bolts are threadedly connected at both ends of the support plate surface;

[0021] Based on the above technical features: the setting of the fixing plate can effectively ensure the stability of the slider after installation and the assemblability of the overall device.

[0022] As a preferred solution of the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: the right-angle node structure includes an L-shaped connecting plate clamped on the outer side of the middle waist plate of two groups of I-beam bodies, and a second fixing screw is arranged on the top of one of the connecting plates, one end of the second fixing screw passes through the two connecting plates and the I-beam body, and a nut is threadedly connected to the other end of the first fixing screw;

[0023] Based on the above technical features: two adjacent connecting plates are connected by a second fixing screw, thereby realizing the connection of adjacent I-beam bodies.

[0024] As a preferred solution of the connection node of the new type of foundation pit support I-beam waist beam described in the utility model: the right-angle node structure also includes an L-shaped clamping plate, and the top of each clamping plate is provided with a limit rod, one end of the limit rod passes through the clamping plate and extends into the I-beam body, and a horizontal tie rod is also provided at the upper end of the limit rod;

[0025] Based on the above technical features: through the setting of the clamping plate, the flange plates on two adjacent I-beam bodies can be connected, and the transverse pulling force is provided by the transverse tie rod to enhance the strength of the I-beam waist beam to avoid deformation due to external tension or pressure during use, and the I-beam waist beam can be quickly installed and fixed, thereby improving the strength of the I-beam waist beam.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the utility model provides a new type of connection node of the I-beam waist beam for foundation pit support, which has the following beneficial effects:

[0028] 1. By setting a wall connection node structure, when connecting the I-beam waist beam, the first connecting piece clamps one end of the two I-beams to quickly connect them, the first fixing screw can fix the first connecting piece and the I-beam, the limit plate is installed on the first connecting piece through a slider to stably support the I-beam, the limit plate is installed at the upper and lower ends of the I-beam to improve the strength of the I-beam, the clamping block cooperates with the compression spring to fix the limit plate, the limit block can improve the limiting effect of the limit plate on the I-beam, the prestressed anchor cable cooperates with the support plate to apply anchoring force to the I-beam, and then the I-beam is reinforced by the limit bolt and the fixing plate. The I-beam waist beam can be quickly connected and installed, the welding process is reduced, and the stability of the I-beam waist beam is improved.

[0029] 2. By setting a right-angle node structure, when connecting the I-beam waist beam, the second connecting member is set between the two groups of I-beam waist beams to connect the two groups of I-beam waist beams. The second connecting member cooperates with the second fixing screw to fasten the I-beam waist beam through the connecting plate. The clamping plates at the upper and lower ends of the second connecting member are L-shaped, which can limit the two groups of I-beam waist beams. The limiting rod can limit and fix them, and the I-beam waist beam can be quickly installed and fixed, thereby improving the strength of the I-beam waist beam; it can effectively reduce the brittleness of the welding process and the welding structure, and ensure the convenience of the mechanical connection structure during assembly and the disassembly and turnover after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an installation effect diagram of the connection node of the I-beam waist beam for foundation pit support of the utility model;

[0031] Figure 2 This is the installation effect diagram of the wall connection node structure of the utility model;

[0032] Figure 3 It is a structural schematic diagram of the wall connection node structure of the utility model;

[0033] Figure 4 It is a structural schematic diagram of a part of the wall connection node structure of the utility model;

[0034] Figure 5 For this utility model Figure 2 A partial enlarged view of the middle A;

[0035] Figure 6 It is a structural schematic diagram of the right-angle node structure of the utility model.

[0036] In the figure: 1. foundation pit wall; 2. I-beam main body; 3. wall connection node structure; 31. first connecting piece; 32. first fixing screw; 33. limit plate; 34. slider; 35. clamping block; 36. compression spring; 37. limit block; 38. support plate; 310. fixing plate; 311. limit bolt; 5. right-angle node structure; 51. horizontal tie rod; 52. connecting plate; 53. second fixing screw; 54. clamping plate; 55. limit rod. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Example 1: Please refer to Figure 1-6 , the utility model provides a technical solution:

[0039] A novel connection node of an I-beam waist beam for foundation pit support is arranged on a foundation pit wall 1 and used in conjunction with an I-beam body 2 arranged on the inner wall of the foundation pit wall 1. The connection node includes a wall connection node structure 3 and a right-angle node structure 5. The wall connection node structure 3 and the right-angle node structure 5 are both arranged at one end of the I-beam body 2 and are used to quickly connect and install two adjacent I-beam bodies 2; wherein the wall connection node structure 3 is connected to the foundation pit wall 1 through a prestressed anchor cable 4 and is used to connect two adjacent I-beam bodies 2 at the same horizontal height; the right-angle node structure is used to connect two adjacent I-beam bodies 2 at the right-angle corner of the foundation pit wall 1;

[0040] In this embodiment, when the above-mentioned structure is in use, firstly, two adjacent I-beam bodies 2 at the same horizontal height of the foundation pit wall 1 are connected by prestressed anchor cables 4 and wall connection node structures 3, and the I-beam body 2 is located on the outside of the foundation pit wall 1; at the right-angle corner of the foundation pit wall 1, the two adjacent I-beam bodies 2 are connected by using the right-angle node structure 5 to form an I-beam waist beam structure for foundation pit support.

[0041] Example 2: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in order to connect two adjacent I-beam bodies 2 at the same horizontal height in the foundation pit wall 1, the wall connection node structure 3 is designed to include a first connecting member 31 clamped on the outer side of the middle waist plate of the two adjacent I-beam bodies 2, and a plurality of evenly distributed first fixing screws 32 are arranged at both ends of the top of the first connecting member 31, one end of the first fixing screw 32 passes through the first connecting member 31 and the I-beam body 2 in sequence, and a nut is threadedly connected at the other end of the first fixing screw 32;

[0042] In this embodiment, when the above structure is in use, two adjacent first connecting members 31 are connected by the first fixing screw 32 , thereby realizing the connection of adjacent I-beam bodies 2 .

[0043] As a preferred solution in this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the wall connection node structure 3 also includes a limit plate 33 slidably connected to both sides of the first connecting member 31, the limit plate 33 is used in conjunction with the flange plates at both ends of the I-beam body 2, and a slider 34 is fixedly connected to the bottom end of the limit plate 33, the slider 34 is slidably connected to the slide groove provided on the first connecting member 31, and two clamping blocks 35 are slidably connected to the inner wall of the slide groove on the first connecting member 31, one end of the clamping block 35 is provided with two compression springs 36, and the other end of the clamping block 35 passes through the side wall of the slide groove on the first connecting member 31 and extends into the slider 34;

[0044] In the present embodiment, when the above structure is in use, the slider 34 is inserted into the slide groove on the first connecting member 31, so as to realize the installation of different specifications of limit plates 33 during installation, so as to match the fixing requirements of the flange plates at both ends of different types of I-beam main body 2; at the same time, in the process of installing the limit plate 33, the slider 34 is squeezed on the arc surface of the block 35 to squeeze the block 35, so that the compression spring 36 is compressed, and after the installation is completed, the block 35 pops up again under the action of the compression spring 36, which effectively ensures the limiting effect of the slider 34 after installation and ensures the stability of the connection structure.

[0045] As a preferred solution in this embodiment, Figure 2 and Figure 3 As shown, two limiting blocks 37 are fixedly connected to both ends of the inner wall of the limiting plate 33;

[0046] In this embodiment, by providing the limiting block 37 , the limiting block 37 can be tightly pressed against the flange plates at both ends of the I-beam body 2 during use, so as to position the I-beam body 2 .

[0047] As a preferred solution in this embodiment, Figure 2 and Figure 3 As shown, a support plate 38 is also provided on one side of the I-beam body 2, and the support plate 38 is connected to the prestressed anchor cable 4;

[0048] In this embodiment, the I-beam body 2 can be fixed to the outside of the foundation pit wall 1 by using the support plate 38 in conjunction with the prestressed anchor cable 4, effectively ensuring the integrity of the I-beam body 2 and the foundation pit wall 1 after installation, as well as the supporting effect of the I-beam body 2 on the foundation pit wall 1. At the same time, the structure adopts mechanical connection, which can effectively reduce the brittleness of the welding process and the welded structure, and ensure the convenience of the mechanical connection structure during assembly and the disassembly and turnover after use.

[0049] As a preferred solution in this embodiment, Figure 2 and Figure 3 As shown, two fixing plates 310 are slidably connected to both ends of the support plate 38, the fixing plates 310 are clamped with the I-beam body 2, and two limiting bolts 311 are threadedly connected to both ends of the surface of the support plate 38;

[0050] In this embodiment, the provision of the fixing plate 310 can effectively ensure the stability of the slider 34 after installation and the assemblability of the entire device.

[0051] Example 3: Figure 6 As shown, the right-angle node structure 5 includes a connecting plate 52 clamped on the outer side of the middle waist plate of the two groups of I-beam bodies 2, the connecting plate 52 is an L-shaped right-angle steel plate, and a second fixing screw 53 is arranged at the top end of one of the connecting plates 52, one end of the second fixing screw 53 passes through the two connecting plates 52 and the I-beam body 2, and a nut is threadedly connected at the other end of the first fixing screw 32;

[0052] In this embodiment, when the above structure is in use, two adjacent connecting plates 52 are connected by the second fixing screw 53 , thereby realizing the connection of adjacent I-beam bodies 2 .

[0053] As a preferred solution in this embodiment, Figure 6 As shown, the right-angle node structure 5 also includes an L-shaped clamping plate 54, and a limit rod 55 is provided at the top of each clamping plate 54. One end of the limit rod 55 passes through the clamping plate 54 and extends into the I-beam body 2, and a horizontal tie rod 51 is provided at the upper end of the limit rod 55;

[0054] In this embodiment, when the above structure is in use, the flange plates on two adjacent I-beam bodies 2 can be connected through the setting of the clamping plate 54, and the transverse pulling force is provided by the transverse tie rod 51 to enhance the strength of the I-beam waist beam to avoid deformation due to external tension or pressure during use, and the I-beam waist beam can be quickly installed and fixed, thereby improving the strength of the I-beam waist beam.

[0055] When the connection node of the utility model foundation pit support I-beam waist beam is in use: one end of the two I-beam bodies 2 is installed at the two ends of the first connecting piece 31, one end of the first fixing screw 32 passes through the first connecting piece 31 and the I-beam body 2, and then is threadedly connected with the nut to fix it, the limit plate 33 is installed on the first connecting piece 31 through the slider 34 to limit the I-beam body 2, the block 35 cooperates with the compression spring 36 to move to one side and insert into the slider 34 to fix the limit plate 33, the support plate 38 cooperates with the prestressed anchor cable 39 to fix the I-beam body The anchoring force is applied to the body 2, the fixing plate 310 is clamped at the rear end of the support plate 38, the rotating limit bolt 311 is threadedly connected with the fixing plate 310 to reinforce the I-beam body 2, the second connecting piece 51 connects the two groups of I-beam bodies 2 through two connecting plates 52, one end of the second fixing screw 53 passes through the connecting plate 52 and the I-beam body 2 and is threadedly connected with the nut to fix the two groups of I-beam bodies 2, the two ends of the clamping plate 54 limit the two groups of I-beam bodies 2, and the limit rod 55 passes through the clamping plate 54 and extends into the I-beam body 2 to reinforce it.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0057] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of connection node of an I-beam waist beam for foundation pit support, which is arranged on a foundation pit wall (1) and is adapted to an I-beam body (2) arranged on the inner wall of the foundation pit wall (1), characterized in that: It comprises a wall connection node structure (3) and a right-angle node structure (5) arranged at the end of the I-beam body (2); the wall connection node structure (3) is connected to the foundation pit wall (1) through a prestressed anchor cable (4) and is compatible with two adjacent I-beam bodies (2) at the same horizontal height; the right-angle node structure (5) is arranged at a right-angle corner of the foundation pit wall (1) and is compatible with the I-beam body (2).

2. A new type of connection node of the I-beam waist beam for foundation pit support as claimed in claim 1, characterized in that: The wall connection node structure (3) comprises a first connecting member (31) which is clamped to the outer side of the middle waist plate of two adjacent I-beam bodies (2), and both ends of the top of the first connecting member (31) are provided with evenly distributed first fixing screws (32), one end of the first fixing screw (32) passes through the first connecting member (31) and the I-beam body (2) in sequence, and a nut is threadedly connected to the other end of the first fixing screw (32).

3. A new type of connection node of the I-beam waist beam for foundation pit support as claimed in claim 2, characterized in that: The wall connection node structure (3) also includes a limit plate (33) slidably connected to both sides of the first connecting member (31), the limit plate (33) is adapted to the flange plates at both ends of the I-beam body (2), and a slider (34) is provided at the bottom end of the limit plate (33), the slider (34) is slidably connected to a slide groove provided on the first connecting member (31), and a clamping block (35) is slidably connected to the inner wall of the slide groove on the first connecting member (31), one end of the clamping block (35) is provided with two compression springs (36), and the other end of the clamping block (35) passes through the side wall of the slide groove on the first connecting member (31) and extends into the slider (34).

4. A new type of connection node of the I-beam waist beam for foundation pit support as claimed in claim 3, characterized in that: Limiting blocks (37) are provided at both ends of the inner wall of the limiting plate (33).

5. A new type of connection node of the I-beam waist beam for foundation pit support as claimed in claim 3, characterized in that: A support plate (38) is also provided on one side of the I-beam body (2), and the support plate (38) is connected to the prestressed anchor cable (4).

6. A new type of connection node of I-beam waist beam for foundation pit support as claimed in claim 5, characterized in that: Two fixing plates (310) are slidably connected at both ends of the support plate (38), the fixing plates (310) are clamped and connected to the I-beam body (2), and limiting bolts (311) are threadedly connected at both ends of the surface of the support plate (38).

7. A new type of connection node of I-beam waist beam for foundation pit support as claimed in claim 2, characterized in that: The right-angle node structure (5) comprises an L-shaped connecting plate (52) clamped on the outer side of the middle waist plate of the two groups of I-beam bodies (2), and a second fixing screw (53) is arranged at the top end of one of the connecting plates (52), one end of the second fixing screw (53) passes through the two connecting plates (52) and the I-beam body (2), and a nut is threadedly connected to the other end of the first fixing screw (32).

8. A new type of connection node of I-beam waist beam for foundation pit support as claimed in claim 7, characterized in that: The right-angle node structure (5) also includes an L-shaped clamping plate (54), and a limiting rod (55) is arranged at the top end of the clamping plate (54). One end of the limiting rod (55) passes through the clamping plate (54) and extends into the I-beam body (2), and a transverse tie rod (51) is also arranged at the upper end of the limiting rod (55).

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