A diagonal arm support end connecting structure

Abstract

The utility model discloses a kind of inclined strut arm support end connecting structures, relate to building foundation pit support technical field.The inclined strut arm support end connecting structure includes positioning mechanism, embedded part and connecting mechanism;Embedded part is precast in foundation pit support foundation, positioning mechanism contains locating block and the sliding member sleeved thereon, connecting mechanism contains prestressed adjusting screw rod, sliding block and connecting plate, prestressed adjusting screw rod is inserted in sliding member, and sliding block is rotatably connected with connecting plate.By embedded part, it is realized to position installation quickly, sliding member adapts different support point, prestressed adjusting screw rod controls support force, and connecting plate can be rotatably adapted to the angle of foundation pit side wall.The inclined strut arm support end connecting structure improves installation efficiency, prestressed adjustment can be dynamically adjusted, adapts more foundation pit slope scene, and is suitable for building foundation pit side edge support.

Description

Technical Field

[0001] This utility model relates to the field of building foundation pit support technology, specifically a diagonal brace support end connection structure. Background Technology

[0002] In foundation pit engineering, side support is the core link to ensure the safety of foundation pit construction. As a key supporting component of the foundation pit side support system, the connection stability of the support end of the diagonal brace directly determines the deformation resistance of the foundation pit sidewall and the safety performance of the overall support system.

[0003] Construction pits are characterized by limited space, complex sidewall stress, and tight construction schedules. Existing bracing arm support connection structures present several significant problems when applied to this scenario: First, installation and positioning are difficult. Limited working space around the pit sidewalls necessitates repeated adjustments to achieve precise alignment between the bracing arm and support points, severely impacting construction progress. Second, prestress adjustment precision is insufficient. The stress on the pit sidewalls changes dynamically during excavation, making it difficult for existing structures to accurately adjust the prestress of the bracing arm based on pit deformation monitoring data. This can lead to excessive support resulting in material waste or insufficient support causing safety hazards. Third, poor adaptability and reliability. They cannot flexibly adapt to the side support angles and positions required for pits of varying depths and slopes. Furthermore, the damp and dusty construction environment of pits makes connection nodes prone to corrosion and loosening after long-term use, directly threatening construction safety.

[0004] Traditional connection structures are difficult to install and position, requiring repeated adjustments to achieve successful connection, which affects the construction progress of the foundation pit; the prestress adjustment is insufficient, and the stress on the sidewall of the foundation pit will change dynamically during the excavation process, making it difficult for existing structures to adjust the prestress of the diagonal bracing arm according to the deformation of the foundation pit; the adaptability and reliability of the scene are poor, and it is not possible to flexibly adapt to the side support angle and position requirements of foundation pits with different depths and slopes. Utility Model Content

[0005] The purpose of this utility model is to provide a diagonal brace support end connection structure to solve the problems mentioned in the background art regarding the inconvenience of installation and positioning, low prestress adjustment accuracy, poor angle adaptability, and easy loosening after long-term use of the diagonal brace support end connection structure used for side support of building foundation pits.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a diagonal brace support end connection structure comprising: Positioning mechanism; An embedded part, which is located below the positioning mechanism and inserted into the positioning mechanism; A connecting mechanism, which is sleeved on an embedded part; The positioning mechanism includes a positioning block and a sliding member, wherein the sliding member is sleeved on the positioning block; The connecting mechanism includes a prestress adjusting screw, a slider, and a connecting plate. The prestress adjusting screw is inserted into the slider, the slider is sleeved on the outside of the prestress adjusting screw, and the slider is rotatably connected to the connecting plate. Rotating the adjusting screw moves the slider, which in turn drives the connecting plate to push the diagonal brace arm, thereby adjusting the prestress of the diagonal brace arm.

[0007] Preferably, the positioning block has positioning bolt holes, a boss is fixedly connected to the top of the positioning block, a sliding groove is provided on one side of the boss, a slot is provided on the top of the boss, and a sliding guide rod is provided inside the slot.

[0008] Preferably, the sliding member is inserted into the inner side of the slot and sleeved on the outer side of the sliding guide rod, and a positioning screw is fixedly connected to the outer side of the sliding member.

[0009] Preferably, the positioning screw is inserted into the inner side of the slide groove and extends through the slide groove to the outer side of the boss. A clamping nut is sleeved on the outer side of the positioning screw, and the clamping nut abuts against the outer side of the boss.

[0010] Preferably, a positioning sleeve is fixedly connected to the top of the sliding member.

[0011] Preferably, a threaded sleeve is fixedly connected to the top of the embedded part, and a positioning bolt is inserted into the inner side of the threaded sleeve, with the positioning bolt inserted into the inner side of the positioning bolt hole.

[0012] Preferably, the prestress adjusting screw is inserted into the inner side of the positioning sleeve, a nut is fixedly connected to the outer side of one end of the prestress adjusting screw, and an adjusting shaft is inserted into the inner side of the slider.

[0013] Preferably, a clamping plate is fixedly connected to one side of the connecting plate, and the clamping plate is provided with two sets of clamping plates respectively clamping the two sides of the slider. The clamping plate is sleeved on the outside of the adjusting shaft. The connecting plate has a plurality of threaded sleeve holes evenly distributed in a ring. The threaded sleeve holes are used to fix the diagonal brace arm by bolts.

[0014] The technical effects and advantages of this utility model are as follows: 1. The support end connection structure of this diagonal brace arm achieves dynamic control of prestress during the foundation pit support process through the prestress adjustment screw of the connection mechanism. The prestress adjustment screw cooperates with the positioning sleeve of the sliding component. By rotating the nut, the screw can be driven to move axially, thereby driving the diagonal brace arm to achieve prestress control. This can match the dynamic changes in the sidewall stress during foundation pit excavation, effectively avoiding foundation pit sidewall deformation caused by insufficient prestress or material waste caused by excessive prestress.

[0015] 2. The support end connection structure of the inclined brace arm has its embedded parts pre-cast in the foundation of the foundation pit support or the surrounding stable structure. The pre-embedding work can be completed in the early stage of construction, avoiding the need to chisel the installation points on site after the foundation pit is excavated, which greatly shortens the construction period. 3. The inclined brace support end connection structure improves the angle adaptability and long-term reliability of the foundation pit side support. The two sets of clamping plates symmetrically hold the slider and are connected by adjusting the shaft, which can adapt to the foundation pit side wall support requirements of different slopes. Attached Figure Description

[0016] 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 these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the positioning mechanism of this utility model; Figure 3 This is a schematic diagram of the structure of the embedded part of this utility model; Figure 4 This is a schematic diagram of the connection mechanism of this utility model.

[0018] In the diagram: 1. Positioning mechanism; 11. Positioning block; 111. Positioning bolt hole; 112. Boss; 113. Slide groove; 114. Sliding guide rod; 12. Sliding component; 121. Positioning screw; 122. Clamping nut; 123. Positioning sleeve plate; 2. Embedded part; 21. Threaded sleeve; 22. Positioning bolt; 3. Connecting mechanism; 31. Prestressing adjusting screw; 311. Nut; 32. Slider; 321. Adjusting shaft; 33. Connecting plate; 331. Clamping plate; 332. Threaded sleeve hole. Detailed Implementation

[0019] 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.

[0020] This utility model discloses a diagonal brace support end connection structure, according to the attached... Figure 1As shown, it includes a positioning mechanism 1, an embedded part 2, and a connecting mechanism 3; the embedded part 2 is located below the positioning mechanism 1 and is inserted into the positioning mechanism 1, which is used to achieve rigid fixation between the overall structure and the foundation of the pit support or the surrounding stable structure; the connecting mechanism 3 is sleeved on the embedded part 2, which is used to connect the diagonal brace and adjust its prestress according to the stress of the pit, so as to ensure the stability of the side support of the pit.

[0021] According to the appendix Figure 2 As shown, the positioning mechanism 1 further includes a positioning block 11 and a sliding member 12. The sliding member 12 is sleeved on the positioning block 11 and can slide along the positioning block 11 to adjust its position. The positioning block 11 has a positioning bolt hole 111 for connecting with the embedded part 2. A boss 112 is fixedly connected to the top of the positioning block 11. A groove 113 is provided on one side of the boss 112. A slot is provided on the top of the boss 112. A sliding guide rod 114 is provided inside the slot to guide the sliding of the sliding member 12. The sliding member 12 is inserted into the inner side of the slot and sleeved on the outer side of the sliding guide rod 114. A positioning screw 121 is fixedly connected to the outer side of the sliding member 12. The positioning screw 121 is inserted into the inner side of the slide groove 113 and passes through the slide groove 113 to the outer side of the boss 112. A clamping nut 122 is sleeved on the outer side of the positioning screw 121. The clamping nut 122 abuts against the outer side of the boss 112. By tightening the clamping nut 122, the sliding member 12 can be fixed in the desired position. A positioning sleeve plate 123 is fixedly connected to the top of the sliding member 12 for mounting the connecting mechanism 3.

[0022] According to the appendix Figure 3 As shown, furthermore, a threaded sleeve 21 is fixedly connected to the top of the embedded part 2, and a positioning bolt 22 is inserted into the inner side of the threaded sleeve 21. The positioning bolt 22 is inserted into the inner side of the positioning bolt hole 111, realizing a detachable fixed connection between the embedded part 2 and the positioning block 11. During installation, before the foundation pit is excavated or during the support foundation construction stage, the embedded part 2 is pre-cast into the foundation pit support foundation, cap beam, or surrounding stable rock mass. After the foundation pit is excavated to the support working surface, the positioning block 11 is directly connected through the positioning bolt 22, eliminating the need for on-site drilling and grooving, which greatly improves the construction efficiency of foundation pit support, and is especially suitable for scenarios with tight foundation pit construction schedules.

[0023] According to the appendix Figure 4As shown, the connecting mechanism 3 includes a prestressing adjusting screw 31, a slider 32, and a connecting plate 33. The prestressing adjusting screw 31 is inserted into the inner side of the positioning sleeve 123. A nut 311 is fixedly connected to the outer side of one end of the prestressing adjusting screw 31. By rotating the nut 311 with a torque wrench, the prestressing adjusting screw 31 can be driven to move axially along the positioning sleeve 123, thereby adjusting the prestress of the inclined support arm to meet the need for dynamic adjustment of the support force based on the sidewall displacement monitoring data during the excavation of the foundation pit. The slider 32 is sleeved on the outer side of the prestressing adjusting screw 31, and an adjusting shaft 321 is inserted into the inner side of the slider 32. A clamping plate 331 is fixedly connected to one side of the connecting plate 33. The clamping plate 331 is provided with two sets of clamps respectively on both sides of the slider 32. The clamping plate 331 is sleeved on the outer side of the adjusting shaft 321, so that the connecting plate 33 can rotate around the adjusting shaft 321, which can flexibly adapt to the inclination angle of the sidewall of the foundation pit at different depths and the requirements of the support points. The connecting plate 33 has several threaded sleeve holes 332 evenly distributed in a ring. The threaded sleeve holes 332 are used to connect and fix the diagonal brace arm with high-strength bolts. The ring-shaped distribution of the threaded sleeve holes 332 makes the connection force more uniform. With the control of bolt preload, the shear and pull-out resistance of the connection node can be effectively improved. At the same time, the surface of each component is treated with hot-dip galvanizing for rust prevention, which can resist the rusting effect of the humid environment of the foundation pit and extend the service life.

[0024] Working principle: In the construction of side support for building foundation pits, firstly, during the foundation construction stage before excavation, the embedded part 2 is pre-cast and fixed in the foundation pit cap beam, support pile foundation, or surrounding stable structure to ensure a firm connection between the embedded part 2 and the foundation. After the foundation pit is excavated to the corresponding support working surface, the positioning block 11 is connected and fixed to the threaded sleeve 21 of the embedded part 2 using positioning bolts 22, completing the initial installation of the positioning mechanism 1. According to the design requirements of the side support points of the foundation pit, the position of the sliding part 12 is adjusted by sliding along the sliding guide rod 114 of the positioning block 11, so that the installation position of the connecting mechanism 3 is precisely aligned with the end position of the inclined support arm. After adjustment, the clamping nut 122 on the outside of the positioning screw 121 is tightened, and the sliding part 12 is fixed by the friction between the clamping nut 122 and the boss 112. At the desired location, insert the prestressing adjusting screw 31 into the positioning sleeve 123 of the sliding member 12, and then sequentially install the slider 32. The two sets of clamping plates 331 of the connecting plate 33 are rotatably connected to the slider 32 via the adjusting shaft 321. Based on the inclination angle of the pit sidewall, rotate the connecting plate 33 to a suitable angle, and then connect and fix the end of the diagonal brace arm to the threaded sleeve hole 332 of the connecting plate 33 using high-strength bolts. Using the pit deformation monitoring data, use a torque wrench to rotate the nut 311 at one end of the prestressing adjusting screw 31, driving the prestressing adjusting screw 31 to move axially along the positioning sleeve 123, thereby adjusting the prestress of the diagonal brace arm to the design value, completing the installation and commissioning of the entire support connection structure. During the pit excavation process, the prestress can be repeatedly adjusted based on the monitoring data to ensure support safety.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A diagonal brace support end connection structure, characterized in that, include: Positioning mechanism (1); Embedded part (2), the embedded part (2) is located below the positioning mechanism (1) and inserted into the positioning mechanism (1); A connecting mechanism (3) is sleeved on the embedded part (2); The positioning mechanism (1) includes a positioning block (11) and a sliding member (12), wherein the sliding member (12) is sleeved on the positioning block (11); The connecting mechanism (3) includes a prestress adjusting screw (31), a slider (32) and a connecting plate (33). The prestress adjusting screw (31) is inserted into the slider (12), and the slider (32) is sleeved on the outside of the prestress adjusting screw (31). The slider (32) is rotatably connected to the connecting plate (33). Rotating the adjusting screw (31) causes the slider (32) to move, thereby driving the connecting plate (33) to push the diagonal brace arm, thus achieving the effect of adjusting the prestress of the diagonal brace arm.

2. The diagonal brace support end connection structure according to claim 1, characterized in that, The positioning block (11) has a positioning bolt hole (111), and a boss (112) is fixedly connected to the top of the positioning block (11). A sliding groove (113) is provided on one side of the boss (112), and a slot is provided on the top of the boss (112). A sliding guide rod (114) is provided inside the slot.

3. The diagonal brace support end connection structure according to claim 2, characterized in that, The sliding member (12) is inserted into the inner side of the slot and sleeved on the outer side of the sliding guide rod (114). A positioning screw (121) is fixedly connected to the outer side of the sliding member (12).

4. The diagonal brace support end connection structure according to claim 3, characterized in that, The positioning screw (121) is inserted into the inner side of the slide groove (113) and passes through the slide groove (113) to the outer side of the boss (112). A clamping nut (122) is sleeved on the outer side of the positioning screw (121), and the clamping nut (122) abuts against the outer side of the boss (112).

5. The diagonal brace support end connection structure according to claim 3, characterized in that, The top of the sliding member (12) is fixedly connected to a positioning sleeve (123).

6. The diagonal brace support end connection structure according to claim 2, characterized in that, The top of the embedded part (2) is fixedly connected to a threaded sleeve (21), and a positioning bolt (22) is inserted into the inner side of the threaded sleeve (21). The positioning bolt (22) is inserted into the inner side of the positioning bolt hole (111).

7. The diagonal brace support end connection structure according to claim 1, characterized in that, The prestress adjustment screw (31) is inserted into the inner side of the positioning sleeve (123), and a nut (311) is fixedly connected to the outer side of one end of the prestress adjustment screw (31). An adjustment shaft (321) is inserted into the inner side of the slider (32).

8. The diagonal brace support end connection structure according to claim 1, characterized in that, A clamping plate (331) is fixedly connected to one side of the connecting plate (33). The clamping plate (331) is provided with two sets of clamps on both sides of the slider (32). The clamping plate (331) is sleeved on the outside of the adjusting shaft (321). The connecting plate (33) has several threaded sleeve holes (332) evenly distributed in a ring. The threaded sleeve holes (332) are used to fix the inclined support arm with bolts.

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