Foundation pit steel enclosing purlin supporting structure

Abstract

The foundation pit steel enclosing purlin supporting structure comprises a steel sheet pile, an enclosing purlin body and a lower supporting frame, the lower supporting frame comprises a first horizontal part and a first vertical part vertically arranged on the bottom face of the first horizontal part, and the first vertical part is connected to the steel sheet pile through a connecting piece; the enclosing purlin body is placed at the top end of the first horizontal part and attached to the steel sheet pile, the connecting assembly comprises a connecting cylinder, an abutting ring plate and a connecting arc block, the connecting cylinder penetrates through the enclosing purlin body and the steel sheet pile, and the abutting ring plate is connected to one end of the connecting cylinder and abuts against the side, away from the steel sheet pile, of the enclosing purlin body; an inner cavity of the connecting cylinder is hollow, a connecting sliding groove is formed in the connecting cylinder, the connecting arc block is arranged in the connecting sliding groove in a sliding mode, and a first driving piece used for driving the connecting arc block is arranged in the connecting cylinder. The method has the effect of improving the connection strength and the installation efficiency of the steel enclosing purlin.

Description

Technical Field

[0001] The present application relates to the technical field of construction equipment, and in particular to a foundation pit steel purlin support structure. Background Art

[0002] The purlin refers to the steel beam installed on the top of the steel plate support pile. It mainly plays the role of keeping the formwork in a flat structure and connecting the formwork with the lifting frame. The stiffness of the purlin in the support system has a great influence on the stiffness of the entire support structure. Steel purlins are generally spliced ​​with double or multiple steel sections of the same length. Steel purlins are used to connect the support and the retaining piles. The gap between them needs to be filled with fine stone concrete to fix the steel support and transfer the load.

[0003] At present, a Chinese patent with the announcement number CN216238481U discloses a steel sheet pile purlin support device, including a hook and a corbel support, the two hooks are fixedly connected, the corbel support is fixed on one side of the hook, and also includes a pressure sensor, which is fixed on the other side of the hook. When in use, the hook is first hooked on the top edge of the steel sheet pile, and then the purlin is installed on the top of the corbel support to play a role in supporting the steel sheet pile.

[0004] With regard to the above-mentioned related technologies, the inventor believes that during the use of the above-mentioned steel sheet pile purlin support device, on the one hand, since the corbel support is directly hung on the top edge of the steel sheet pile through a hook, the weight of the support device and the purlin is directly supported by the top edge of the steel sheet pile, and the top of the steel sheet pile is easily compressed, deformed and damaged after a long period of use. On the other hand, the purlin and the steel sheet pile need to be fixedly connected by welding or other methods, which is a complicated process, takes a long time, and is not easy to load and unload the purlin and the steel sheet pile. Utility Model Content

[0005] In order to improve the connection strength and installation efficiency of steel perimeter purlins, the present application provides a foundation pit steel perimeter purlin support structure.

[0006] The present application provides a foundation pit steel purlin support structure adopts the following technical solution:

[0007] A foundation pit steel perimeter purlin support structure, comprising a steel sheet pile, a perimeter purlin body and a lower support frame, wherein the lower support frame comprises a first horizontal portion and a first vertical portion vertically arranged on the bottom surface of the first horizontal portion, the first vertical portion is connected to the steel sheet pile through a connecting piece, the perimeter purlin body is placed on the top of the first horizontal portion and fits with the steel sheet pile, and further comprises a connecting assembly, the connecting assembly comprises a connecting tube, an abutting ring plate and a connecting arc block, a first connecting port is opened on the perimeter purlin body, a first connecting port corresponding to the first connecting port is opened on the steel sheet pile, and the connecting tube is connected to the steel sheet pile through the first connecting piece. The connecting port and the second connecting port pass through the purlin body and the steel sheet piles, the abutment ring plate is connected to one end of the connecting tube and abuts against the side of the purlin body away from the steel sheet piles, the inner cavity of the connecting tube is hollow, and a connecting slide groove connected to its inner cavity is provided on the connecting tube, the connecting arc block is slidably set in the connecting slide groove, and a first driving member for driving one end of the connecting arc block to extend out of the connecting tube is provided in the connecting tube. When the connecting arc block extends out of the connecting tube, one end of the connecting arc block abuts against the side of the steel sheet pile away from the purlin body.

[0008] By adopting the above technical solution, when installing the device, the lower support frame is installed on the steel sheet pile, and the purlin body is placed on the lower support frame so that the first connecting port corresponds to the second connecting port. The connecting tube is passed through the first connecting port and the second connecting port at the same time, so that the abutting ring plate abuts against the purlin body, and the first driving member is used to drive one end of the connecting arc block to extend out of the connecting tube, and one end of the connecting arc block abuts against the side wall of the steel sheet pile, thereby realizing the connection between the steel sheet pile and the purlin body. Through the mutual cooperation of the steel sheet pile, the purlin body, the lower support frame and the connecting assembly, the steel sheet pile and the purlin body are stably and quickly connected, which has the effect of improving the connection strength of the steel purlin and the installation efficiency.

[0009] Optionally, a connecting slide rod is connected to the connecting tube along the length direction, and the first driving member includes a driving ring block and a push rod, the driving ring block is slidably sleeved on the connecting slide rod, the driving ring block is arranged on a side of the connecting arc block close to the abutting ring plate, and an end of the driving ring block close to the connecting arc block is provided with a driving cone surface, the diameter of the driving ring block decreases along the direction away from the abutting ring plate, and an abutting arc surface corresponding to the driving cone surface is provided on the side of the connecting arc block close to the abutting ring plate, the driving cone surface of the driving ring block is slidingly fitted with the abutting arc surface of the connecting arc block, the push rod is connected to the side of the driving ring block away from the connecting arc block and is parallel to the connecting slide rod, one end of the push rod extends out of the connecting tube and is slidably connected to the connecting tube, and a reset member is provided between the connecting arc block and the connecting slide rod.

[0010] By adopting the above technical solution, the push rod is pushed, and the driving ring block is pushed along the connecting slide rod toward the direction close to the connecting arc block, and the abutting arc surface of the connecting arc block and the driving conical surface of the driving ring block slide relative to each other, and one side of the connecting arc block extends out of the connecting cylinder, thereby realizing the connection between the surrounding purlin body and the steel sheet pile. When the connecting cylinder needs to be removed, the push rod is pulled in the opposite direction, and the driving ring block is separated from the connecting arc block. The connecting arc block is reset under the action of the reset member and retracted into the connecting cylinder, which facilitates the rapid loading and unloading of the connection assembly.

[0011] Optionally, the reset member includes a reset spring, one end of the reset spring is connected to the connecting arc block, and the other end is connected to the connecting slide rod. The push rod extends out of one end of the connecting tube and is rotated to provide a limit block. The end of the connecting tube is connected to a fixed block, and a fixed groove corresponding to the limit block is provided on the fixed block. In a natural state, the connecting arc block is located in the connecting tube under the action of the reset spring, and when the limit block rotates and is embedded in the fixed groove, the driving ring block pushes the connecting arc block out of the connecting tube.

[0012] By adopting the above technical solution, when connecting the purlin body, the push rod is pushed toward the inside of the connecting tube, and the limit block is rotated so that it is embedded in the fixing groove of the fixing block, thereby realizing the positioning of the limit block and the push rod. At this time, the connecting arc block extends out of the connecting tube under the drive of the driving ring block, and the reset spring is stretched to accumulate elastic potential energy. When the connecting tube needs to be removed, the limit block is rotated out of the fixing groove, and the push rod is pulled in the direction away from the connecting tube. The connecting arc block is retracted into the connecting tube under the action of the reset spring, and the setting of the reset spring realizes the reset of the connecting arc block.

[0013] Optionally, an upper support frame is provided on one side of the steel sheet pile where the lower support frame is provided, the upper support frame includes a second horizontal portion and a second vertical portion vertically provided on the top surface of the second horizontal portion, the second vertical portion is connected to the steel sheet pile through a connecting piece, the purlin body is clamped between the upper support frame and the lower support frame, a clamping assembly is provided on the first horizontal portion and the second horizontal portion, the clamping assembly includes a mounting plate and a clamping member, one mounting plate is provided at the top end of the first horizontal plate and the bottom end of the second horizontal portion, the mounting plate is provided on a side of the purlin body away from the steel sheet pile, the mounting plate is spaced apart from the purlin body, the clamping member is movably provided on the mounting plate, and a second driving member for driving the clamping member close to the purlin body is provided on the mounting plate.

[0014] By adopting the above technical solution, the upper support frame and the lower support frame clamp the purlin body therebetween. After the installation of the upper support frame and the lower support frame is completed, the clamping member is pressed against the side wall of the purlin body through the second driving member, thereby achieving the compression of the purlin body and improving the connection strength between the purlin body and the steel sheet piles.

[0015] Optionally, the clamping member includes a clamping eccentric block and a lever, and a rotating through groove for accommodating the clamping eccentric block is opened on the mounting plate, the clamping eccentric block is rotatably arranged in the rotating through groove, the lever is arranged on the side of the mounting plate away from the purlin body, the lever is connected to the clamping eccentric block, and when the clamping eccentric block rotates to a certain position, the edge of the clamping eccentric block is pressed against the side wall of the purlin body.

[0016] By adopting the above technical solution, after completing the connection between the upper support frame and the lower support frame and the steel sheet piles, the lever is rotated, and the eccentric block is compressed in the rotating groove along with the lever until the edge of the eccentric block is compressed against the side wall of the purlin body, thereby achieving the fixation of the purlin body and improving the connection strength between the purlin body and the steel sheet piles.

[0017] Optionally, an anti-slip gasket is connected to the circumference of the clamping eccentric block.

[0018] By adopting the above technical solution, the provision of the anti-skid gasket increases the friction between the pressing eccentric block and the surrounding purlin body, and reduces the possibility of relative sliding of the pressing eccentric block when pressing the surrounding purlin body.

[0019] Optionally, the clamping member includes a clamping plate, an adjusting screw and a rotating block, the clamping plate is arranged on a side of the mounting plate close to the purlin body and parallel to the mounting plate, the adjusting screw is vertically threadedly connected to the mounting plate, one end of the adjusting screw is rotatably connected to the clamping plate, and the other end is connected to the rotating block.

[0020] By adopting the above technical solution, the rotating block is screwed, and the clamping plate moves toward the direction close to the purlin body under the action of the adjusting screw and presses the side wall of the purlin body, thereby fixing the purlin body and helping to improve the connection strength between the purlin body and the steel sheet piles.

[0021] Optionally, a pressing rubber pad is provided on the side of the pressing plate facing away from the mounting plate.

[0022] By adopting the above technical solution, the setting of the compression rubber pad avoids the possibility of the compression plate being directly rigidly connected to the purlin body and causing damage to the purlin body, and also improves the friction between the compression plate and the purlin body.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Through the cooperation of steel sheet piles, purlin body, lower support frame and connection components, the stable and fast connection between steel sheet piles and purlin body is achieved, which has the effect of improving the connection strength and installation efficiency of steel purlin;

[0025] 2. The setting of the reset spring realizes the automatic reset of the connecting arc block;

[0026] 3. The setting of the clamping assembly realizes the fixation of the purlin body and improves the connection strength between the purlin body and the steel sheet piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a foundation pit steel purlin support structure used in Example 1 of the present application.

[0028] Figure 2 It is a partial cross-sectional view used to illustrate the connection component in the embodiment of the present application.

[0029] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0030] Figure 4 It is a structural schematic diagram used to reflect the internal structure of the connecting tube in Example 1 of the present application.

[0031] Figure 5 It is a structural schematic diagram of a foundation pit steel purlin support structure used in Example 2 of the present application.

[0032] Description of reference numerals: 1, steel sheet pile; 101, second communication port; 2, purlin body; 21, first communication port; 3, upper support frame; 31, second horizontal portion; 32, second vertical portion; 33, second reinforcement plate; 4, lower support frame; 41, first horizontal portion; 42, first vertical portion; 43, first reinforcement plate; 5, connecting assembly; 51, connecting tube; 52, abutting ring plate; 53, abutting rubber ring; 54, connecting arc block; 55, driving ring block; 56, connecting slide rod; 57 , reset spring; 58, push rod; 59, tension spring; 6, clamping assembly; 61, mounting plate; 62, clamping eccentric block; 63, lever; 64, anti-skid washer; 65, rotating shaft; 66, clamping plate; 67, clamping rubber pad; 68, adjusting screw; 69, rotating block; 7, connecting slide groove; 8, abutting arc surface; 9, driving cone surface; 10, limit block; 11, fixed block; 12, fixed groove; 13, rotating through groove; 14, connecting block; 15, limit ring; 16, clamping groove. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5The present application is further described in detail. The present application provides a foundation pit steel perimeter purlin support structure, which has the effect of improving the connection strength and installation efficiency of the steel perimeter purlin.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2 A foundation pit steel purlin support structure includes a steel sheet pile 1, a purlin body 2, an upper support frame 3, a lower support frame 4, a connection assembly 5 and a clamping assembly 6. The purlin body 2, the upper support frame 3 and the lower support frame 4 are all arranged on the same side of the steel sheet pile 1. The purlin body 2 is an I-shaped pile. The purlin body 2 is horizontally connected to the vertical side wall of the steel sheet pile 1 by bolts and the connection assembly 5. The lower support frame 4 includes a first horizontal portion 41, a first vertical portion 42 and a first reinforcing plate 43. The first vertical portion 42 is connected to the vertical side wall of the steel sheet pile 1 by bolts. The length direction of the first vertical portion 42 is arranged parallel to the length direction of the purlin body 2. The first horizontal portion 41 is arranged on the side where the top edge of the first vertical portion 42 is away from the steel sheet pile 1, and a plurality of first reinforcing plates 43 are vertically fixedly connected on the side where the first vertical portion 42 and the first horizontal portion 41 are close to each other. The upper support frame 3 includes a second horizontal portion 31, a second vertical portion 32 and a second reinforcing plate 33. The second vertical portion 32 is connected to the vertical side wall of the steel sheet pile 1 by bolts, and the length direction of the second vertical portion 32 is arranged parallel to the length direction of the purlin body 2. The second horizontal portion 31 is arranged on the side where the bottom edge of the second vertical portion 32 is away from the steel sheet pile 1, and a plurality of second reinforcing plates 33 are vertically fixedly connected on the side where the second vertical portion 32 and the second horizontal portion 31 are close to each other. The purlin body 2 is sandwiched between the first horizontal portion 41 and the second horizontal portion 31.

[0036] Reference Figure 2-4The connection assembly 5 is arranged between the purlin body 2 and the steel sheet pile 1, and the connection assembly 5 includes a connection tube 51, an abutting ring plate 52, an abutting rubber ring 53, a connection arc block 54, a driving ring block 55, a connection slide rod 56, a reset spring 57, a push rod 58 and a tension spring 59. The connection tube 51 is hollow, the abutting ring plate 52 is fixedly connected to the outer ring wall at one end of the length direction of the connection tube 51, and the abutting rubber ring 53 is fixedly arranged on the side of the abutting ring plate 52 facing the connection tube 51. A plurality of connection slide grooves 7 are provided on the side wall of the connection tube 51 at equal angles along the circumferential direction, and the inner cavity of the connection slide groove 7 is connected to the inner cavity of the connection tube 51. A connection arc block 54 is slidably arranged in each connection slide groove 7. The connecting slide bar 56 is coaxially fixedly connected to the connecting tube 51 along the length direction of the connecting tube 51, and the driving ring block 55 is slidably connected to the connecting slide bar 56. The driving ring block 55 is arranged on the side of the connecting arc block 54 close to the abutting ring plate 52. An abutting arc surface 8 is provided at one end of the connecting arc block 54 close to the driving ring block 55, and a driving conical surface 9 is provided along the circumferential direction at one end of the driving ring block 55 close to the connecting arc block 54. The driving conical surface 9 corresponds to the abutting arc surface 8 in shape and is arranged in a close fit. The outer diameter of the driving ring block 55 gradually decreases in the direction away from the abutting ring plate 52.

[0037] Reference Figure 4 , a plurality of return springs 57 are fixedly connected to the connecting slide bar 56, and the plurality of return springs 57 correspond to the plurality of connecting arc blocks 54 one by one, and one end of the return spring 57 away from the connecting slide bar 56 is fixedly connected to the connecting arc block 54. In the natural state, the connecting arc block 54 is located in the connecting tube 51 under the action of the return spring 57. The tension spring 59 is sleeved on the connecting slide bar 56, and one end of the tension spring 59 is fixedly connected to one end of the driving ring block 55 away from the driving cone surface 9, and the other end of the tension spring 59 is fixedly connected to the inner end surface of the connecting tube 51 close to the abutting ring plate 52. In the natural state, the driving ring block 55 is separated from the connecting arc block 54 under the action of the tension spring 59. One end of the push rod 58 is fixedly connected to one end of the driving ring block 55 away from the driving cone surface 9, and the push rod 58 is arranged parallel to the connecting slide bar 56, and the push rod 58 passes through the end of the connecting tube 51 close to the abutting ring plate 52 and slides with it. One end of the push rod 58 extends out of the connecting tube 51 and is rotatably connected to the limit block 10. The end surface of the connecting tube 51 close to the abutting ring plate 52 is fixedly connected with a fixed block 11. The fixed block 11 is arranged on one side of the push rod 58. A fixing groove 12 corresponding to the limit block 10 is opened on the side wall adjacent to the fixing block 11 and the connecting tube 51.

[0038] Reference Figure 1 and Figure 2 A first connecting port 21 is provided on one side of the purlin body 2 close to the steel sheet pile 1 , and a second connecting port 101 corresponding to the first connecting port 21 is provided on the steel sheet pile 1 . The shapes of the first connecting port 21 and the second connecting port 101 are consistent with the cross-sectional shape of the connecting tube 51 .

[0039] Reference Figure 1 and Figure 3 , the clamping assembly 6 is arranged on the upper support frame 3 and the lower support frame 4, and the clamping assembly 6 includes a mounting plate 61 and a clamping member. The mounting plate 61 is vertically fixedly connected to the side of the first horizontal portion 41 and the second horizontal portion 31 away from the steel sheet pile 1, and the mounting plate 61 is arranged on the side of the first horizontal portion 41 and the second horizontal portion 31 close to the purlin body 2. The clamping member includes a clamping eccentric block 62, a lever 63 and an anti-skid washer 64. A rotating through groove 13 for accommodating the clamping eccentric block 62 is provided on the mounting plate 61, and a rotating shaft 65 is fixedly connected between the two opposite side walls of the rotating through groove 13, and the clamping eccentric block 62 is rotatably sleeved on the rotating shaft 65, and the anti-skid washer 64 is fixedly connected to the peripheral wall of the clamping eccentric block 62 along the circumferential direction. One end of the lever 63 is fixedly connected to the clamping eccentric block 62. When the lever 63 is rotated to a vertical state, the edge of the clamping eccentric block 62 is pressed against the vertical side wall of the purlin body 2. The bottom surface of the first horizontal portion 41 and the top surface of the second horizontal portion 31 are both fixedly connected with a plurality of connecting blocks 14, and the plurality of connecting blocks 14 are arranged one-to-one with the plurality of clamping assemblies 6. A limiting ring 15 for fixing the lever 63 is rotatably connected to the connecting block 14, and a clamping groove 16 for embedding the limiting ring 15 is provided on the side wall of the lever 63.

[0040] Reference Figure 1 and Figure 2 When connecting the purlin, first install the lower support frame 4 on one side of the steel sheet pile 1, and place the purlin body 2 on the top surface of the first horizontal portion 41 so that the position of the first communication port 21 corresponds to the position of the second communication port 101. Figure 4, pull the push rod 58 in the direction away from the connecting tube 51, and the driving ring block 55 slides along the length direction of the connecting slide rod 56. The connecting arc block 54 is separated from the driving arc block, and the connecting arc block 54 slides into the connecting tube 51 in the direction close to the connecting slide rod 56 under the action of the return spring 57. The connecting tube 51 passes through the surrounding purlin body 2 and the steel sheet pile 1 through the first connecting port 21 and the second connecting port 101, and the abutting ring plate 52 is pressed against the side of the surrounding purlin body 2 away from the steel sheet pile 1. Push the push rod 58 in the direction close to the inside of the connecting tube 51, and the tension spring 59 stretches to accumulate elastic potential energy. The driving ring block 55 moves in the direction close to the connecting arc block 54, and the driving cone surface 9 of the driving ring block 55 abuts against the abutting arc surface 8 of the connecting arc block 54 and generates relative sliding, and one end of the connecting arc block 54 extends out of the connecting tube 51 through the connecting slide groove 7, and the return spring 57 stretches to accumulate elastic potential energy. One side of the connecting arc block 54 abuts against the side of the steel sheet pile 1 away from the purlin body 2, thereby realizing the connection between the purlin body 2 and the steel sheet pile 1. The limit block 10 is rotated so that one end of the limit block 10 is clamped in the fixing groove 12 of the fixing block 11, thereby realizing the positioning of the driving ring block 55 and the connecting arc block 54. The setting of the abutting rubber ring 53 avoids the possibility of the abutting ring plate 52 being directly rigidly connected to the side wall of the purlin body 2, thereby causing damage to the surface of the purlin body 2. When the purlin body 2 needs to be removed, the limit block 10 is rotated out of the fixing groove 12, and the driving ring block 55 is away from the connecting arc block 54 under the action of the tension spring 59, and the connecting arc block 54 is retracted into the connecting tube 51 under the action of the reset spring 57, thereby facilitating the loading and unloading of the connecting tube 51.

[0041] Reference Figure 3 After completing the installation of the connection assembly 5, use bolts to install the upper support frame 3 on the vertical side wall of the steel sheet pile 1. Rotate the lever 63 to the vertical state, and the edge of the compression eccentric block 62 rotates with the lever 63 and presses against the vertical side wall of the purlin body 2, thereby improving the tightness of the connection between the purlin body 2 and the steel sheet pile 1. The provision of the anti-skid washer 64 increases the friction between the compression eccentric block 62 and the purlin body 2, and reduces the possibility of relative sliding between the two when pressing. Rotate the limiting ring 15 and engage it in the engaging groove 16 in the lever 63 to limit the lever 63 and reduce the possibility of rotation of the lever 63 during the pressing process.

[0042] The implementation principle of a foundation pit steel purlin support structure in the embodiment of the present application is as follows: when connecting the purlin, first install the lower support frame 4 on one side of the steel sheet pile 1, place the purlin body 2 on the first horizontal portion 41, and pass the connecting tube 51 through the purlin body 2 and the steel sheet pile 1 through the first connecting port 21 and the second connecting port 101. Push the push rod 58 toward the direction close to the inside of the connecting tube 51, and one end of the connecting arc block 54 extends out of the connecting tube 51 through the connecting slide 7, and one side of the connecting arc block 54 abuts against the side of the steel sheet pile 1 away from the purlin body 2, thereby realizing the connection between the purlin body 2 and the steel sheet pile 1.

[0043] After the connection assembly 5 is installed, the upper support frame 3 is installed on the vertical side wall of the steel sheet pile 1. The lever 63 is rotated to a vertical state, and the edge of the eccentric block 62 is pressed against the vertical side wall of the purlin body 2, thereby improving the connection tightness between the purlin body 2 and the steel sheet pile 1.

[0044] Example 2

[0045] Reference Figure 5 The embodiment of the present application is different from the embodiment 1 in that the pressing member includes a pressing plate 66, a pressing rubber pad 67, an adjusting screw 68 and a rotating block 69. The adjusting screw 68 is horizontally threadedly connected to the mounting plate 61, the pressing plate 66 is rotatably connected to one end of the adjusting screw 68 close to the purlin body 2, and the rotating block 69 is fixedly connected to one end of the adjusting screw 68 away from the purlin body 2. The pressing rubber pad 67 is fixedly connected to the side of the pressing plate 66 away from the adjusting screw 68.

[0046] The implementation principle of a foundation pit steel purlin support structure in the embodiment of the present application is as follows: when the purlin body 2 is compressed, the rotating block 69 is screwed, and the compression plate 66 is driven by the adjusting screw 68 to move toward the purlin body 2 and press against the purlin body 2, thereby realizing the compression operation of the purlin body 2 and the steel sheet pile 1. The provision of the compression rubber pad 67 reduces the possibility of the purlin body 2 being damaged due to the hard connection with the compression plate 66.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A foundation pit steel perimeter purlin support structure, comprising a steel sheet pile (1), a perimeter purlin body (2) and a lower support frame (4), wherein the lower support frame (4) comprises a first horizontal portion (41) and a first vertical portion (42) vertically arranged on the bottom surface of the first horizontal portion (41), the first vertical portion (42) being connected to the steel sheet pile (1) through a connecting member, the perimeter purlin body (2) being placed on the top of the first horizontal portion (41) and being in contact with the steel sheet pile (1), characterized in that: The invention also comprises a connecting assembly (5), wherein the connecting assembly (5) comprises a connecting tube (51), an abutting ring plate (52) and a connecting arc block (54); a first connecting port (21) is provided on a side of the purlin body (2) close to the steel sheet pile (1); a second connecting port (101) corresponding to the first connecting port (21) is provided on the steel sheet pile (1); the shapes of the first connecting port (21) and the second connecting port (101) are consistent with the cross-sectional shape of the connecting tube (51); the connecting tube (51) passes through the purlin body (2) and the steel sheet pile (1) through the first connecting port (21) and the second connecting port (101); the abutting ring plate (52) and the connecting arc block (54) are connected to the purlin body (2) and the steel sheet pile (1) through the first connecting port (21) and the second connecting port (101); The ring plate (52) is connected to one end of the connecting tube (51) and abuts against the side of the surrounding purlin body (2) away from the steel sheet pile (1). The inner cavity of the connecting tube (51) is hollow. The connecting tube (51) is provided with a connecting slide groove (7) connected to its inner cavity. The connecting arc block (54) is slidably set in the connecting slide groove (7). The connecting tube (51) is provided with a first driving member for driving one end of the connecting arc block (54) to extend out of the connecting tube (51). When the connecting arc block (54) extends out of the connecting tube (51), one end of the connecting arc block (54) abuts against the side of the steel sheet pile (1) away from the surrounding purlin body (2).

2. The foundation pit steel purlin support structure according to claim 1, characterized in that: A connecting slide rod (56) is connected to the connecting tube (51) along the length direction. The first driving member comprises a driving ring block (55) and a push rod (58). The driving ring block (55) is slidably sleeved on the connecting slide rod (56). The driving ring block (55) is arranged on a side of the connecting arc block (54) close to the abutting ring plate (52). A driving cone surface (9) is arranged on one end of the driving ring block (55) close to the connecting arc block (54). The diameter of the driving ring block (55) decreases along a direction away from the abutting ring plate (52). ) A contact arc surface (8) corresponding to the driving cone surface (9) is provided on one side close to the contact ring plate (52); the driving cone surface (9) of the driving ring block (55) and the contact arc surface (8) of the connecting arc block (54) are slidingly fitted; the push rod (58) is connected to a side of the driving ring block (55) away from the connecting arc block (54) and is parallel to the connecting slide rod (56); one end of the push rod (58) extends out of the connecting tube (51) and is slidingly connected to the connecting tube (51); a reset member is provided between the connecting arc block (54) and the connecting slide rod (56).

3. The foundation pit steel purlin support structure according to claim 2 is characterized in that: The reset member comprises a reset spring (57), one end of the reset spring (57) is connected to the connecting arc block (54), and the other end is connected to the connecting slide rod (56); one end of the push rod (58) extends out of the connecting tube (51) and is rotated to be provided with a limit block (10); the end of the connecting tube (51) is connected with a fixed block (11); a fixed groove (12) corresponding to the limit block (10) is provided on the fixed block (11); in a natural state, the connecting arc block (54) is located in the connecting tube (51) under the action of the reset spring (57); when the limit block (10) is rotated and embedded in the fixed groove (12), the driving ring block (55) pushes the connecting arc block (54) out of the connecting tube (51).

4. The foundation pit steel purlin support structure according to claim 3 is characterized in that: An upper support frame (3) is arranged on one side of the steel sheet pile (1) on which the lower support frame (4) is arranged, the upper support frame (3) comprising a second horizontal portion (31) and a second vertical portion (32) vertically arranged on the top surface of the second horizontal portion (31), the second vertical portion (32) being connected to the steel sheet pile (1) via a connecting piece, the purlin body (2) being sandwiched between the upper support frame (3) and the lower support frame (4), the first horizontal portion (41) and the second horizontal portion (31) being both provided with a clamping assembly (6), the clamping assembly (6) The tightening assembly (6) comprises a mounting plate (61) and a clamping member, wherein one mounting plate (61) is provided at the top end of the first horizontal portion (41) and the bottom end of the second horizontal portion (31), wherein the mounting plate (61) is provided on a side of the purlin body (2) away from the steel sheet pile (1), wherein the mounting plate (61) is spaced apart from the purlin body (2), wherein the clamping member is movably provided on the mounting plate (61), and wherein a second driving member for driving the clamping member to approach the purlin body (2) is provided on the mounting plate (61).

5. The foundation pit steel purlin support structure according to claim 4 is characterized in that: The clamping member comprises a clamping eccentric block (62) and a lever (63); a rotating through groove (13) for accommodating the clamping eccentric block (62) is provided on the mounting plate (61); the clamping eccentric block (62) is rotatably arranged in the rotating through groove (13); the lever (63) is arranged on a side of the mounting plate (61) away from the surrounding purlin body (2); the lever (63) is connected to the clamping eccentric block (62); when the clamping eccentric block (62) is rotated to a certain position, the edge of the clamping eccentric block (62) is pressed against the side wall of the surrounding purlin body (2).

6. The foundation pit steel purlin support structure according to claim 5, characterized in that: An anti-slip washer (64) is connected to the circumference of the pressing eccentric block (62).

7. The foundation pit steel purlin support structure according to claim 4 is characterized in that: The clamping member comprises a clamping plate (66), an adjusting screw (68) and a rotating block (69); the clamping plate (66) is arranged on a side of the mounting plate (61) close to the purlin body (2) and parallel to the mounting plate (61); the adjusting screw (68) is vertically threadedly connected to the mounting plate (61); one end of the adjusting screw (68) is rotatably connected to the clamping plate (66), and the other end is connected to the rotating block (69).

8. The foundation pit steel purlin support structure according to claim 7, characterized in that: A pressing rubber pad (67) is provided on the side of the pressing plate (66) facing away from the mounting plate (61).

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