Enclosing purlin supporting structure for foundation pit construction

Abstract

The utility model belongs to the field of foundation pit supporting, and particularly relates to an enclosing purlin supporting structure for foundation pit construction, which comprises a plurality of mutually clamped steel sheet piles, a plurality of enclosing purlins are annularly and uniformly arranged in the plurality of steel sheet piles, a rotary connecting plate is arranged among the plurality of enclosing purlins, a second push cylinder is rotatably arranged on each outer side wall of the rotary connecting plate, and a plurality of second push cylinders are rotatably arranged on the outer side walls of the second push cylinders. The output end of each second push cylinder is provided with a connecting shaft, each connecting shaft is fixedly connected with the side wall of the corresponding surrounding purlin adjacent to the connecting shaft, the two sides of each connecting shaft are each rotationally provided with a first push cylinder, and the output end of each first push cylinder is connected with the side wall of the corresponding surrounding purlin adjacent to the first push cylinder in a clamped mode. Through the arrangement of the rotating ring groove and other assemblies, the rotatable rotating ring and other structures, the rotating ring groove and the enclosing purlin are driven to vertically move by utilizing the extension and retraction of the output end of the first push cylinder, so that the convenience of height adjustment of the enclosing purlin is effectively improved, and meanwhile, the overall strength of the enclosing purlin can be improved through clamping connection between the clamping connection supporting plate and the clamping connection groove.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foundation pit support, especially relates to a surrounding purlin support structure for foundation pit construction. BACKGROUND

[0002] In the construction engineering construction field, often face the foundation pit of the depth of excavation exceeding 5 meters, or the depth although not exceeding 5 meters, but the geological condition and surrounding environment and underground pipeline are particularly complex, to make the foundation of building or underground structure, in order to ensure the safety of foundation pit construction, need to make support structure around the foundation pit, prevent the foundation pit collapse and lead to the accident, and the surrounding purlin as a part of the support structure, mainly bear the support protection effect to the edge part of the foundation pit top.

[0003] The patent application number CN202021922972.3 discloses a support structure for foundation pit, including several interlocked larsen steel sheet piles, and the steel surrounding purlin located in the inner side of the larsen steel sheet pile, the steel surrounding purlin is provided with a plurality of support structures for supporting, the support structure includes the inclined rod arranged on the steel surrounding purlin and the abutting member abutting the other end of the inclined rod, the abutting member abuts the inclined rod, drives the inclined rod to support the steel surrounding purlin, the support structure cannot support the steel surrounding purlin due to the size of the construction site, improves the support applicability of the foundation pit.

[0004] In the prior art, the inclined rod and the abutting member form an inclined stable support between the ground and the surrounding purlin, but there are still deficiencies:

[0005] Firstly, the existing surrounding purlin support device, when the surrounding purlin is installed, usually needs to use a lifting appliance to hoist the surrounding purlin, but different height steel sheet piles have different requirements for the horizontal installation position of the surrounding purlin, and when the lifting appliance is installed, the horizontal height of the surrounding purlin cannot be accurately controlled, so that the installation of the surrounding purlin is difficult;

[0006] Secondly, after the surrounding purlin is installed, the support device of the surrounding purlin will also encounter the problem of inconvenient installation when supporting and installing the surrounding purlin, and the support point of the support device for the surrounding purlin is single, and cannot form a multi-point uniform support for the entire surrounding purlin, so that the surrounding purlin reduces the protection effect on the steel sheet pile;

[0007] Finally, when the support device supports the surrounding purlin for a long time, the surrounding purlin and the steel sheet pile may deform along with the soil around the foundation pit, so that the support of the support device to the surrounding purlin is loose, and if the support device is not adaptively adjusted, the support effect of the surrounding purlin on the steel sheet pile will be affected. INVENTION CONTENTS

[0008] The utility model discloses in order to overcome the prior art's insufficient, provide a kind of for foundation pit construction's purlin support structure.The utility model is through the setting of rotating ring groove and equal component, so that purlin can rotate rotating ring structure when installation, utilize the telescoping of first push cylinder output end, rotating ring groove and purlin are driven to move vertically, to effectively improve the convenience of purlin height adjustment, the output end of two first push cylinders can also be connected by clamping support plate and the clamping groove on the side wall of purlin It is clamped, effectively prevent purlin from being deformed under the extrusion of foundation pit side wall and steel sheet pile.

[0009] The utility model discloses in order to realize above-mentioned purpose, provide following technical scheme: a kind of for foundation pit construction's purlin support structure, including multiple mutually clamped steel sheet piles, multiple the inside of the steel sheet pile is annular and uniformly provided with multiple purlins, multiple the purlin between being provided with rotating connecting plate, rotating connecting plate every outer side wall is all rotationally provided with second push cylinder, the output end of each second push cylinder is provided with connecting shaft, each connecting shaft is fixedly connected with the side wall of its adjacent purlin, the both sides of each connecting shaft are rotationally provided with one first push cylinder, the output end of each first push cylinder and the side wall of its adjacent purlin are mutually clamped.

[0010] Optionally, the outer circumferential surface of the rotating ring is provided with a rotating ring groove, two rotating rings are rotationally arranged in the rotating ring groove, first rotating connecting pieces are rotationally arranged at the two ends of the two rotating rings, and one side wall of the first rotating connecting piece is fixedly connected with one end of the first push cylinder.

[0011] Optionally, a plurality of clamping grooves are arranged on the side wall of the purlin, clamping support plates are slidingly arranged in the clamping grooves, third rotating connecting pieces are arranged on the end surface of the clamping support plates, second rotating connecting pieces are rotationally connected to the outer part of the third rotating connecting pieces, and one side wall of the second rotating connecting piece is fixedly connected with the output end of the first push cylinder.

[0012] Optionally, elastic screws are rotationally connected between the plurality of rotating rings and the first rotating connecting pieces.

[0013] Optionally, rotating clamping grooves are arranged on each side wall of the rotating connecting plate, fourth rotating connecting pieces are rotationally arranged in each rotating clamping groove, and each fourth rotating connecting piece is fixedly connected with one end of the second push cylinder adjacent thereto.

[0014] Optionally, a clamping piece is arranged at one end of each steel sheet pile, a clamping sliding groove is arranged on the side wall of the clamping piece, a recess is arranged on the inner side wall of each clamping sliding groove, a protrusion is slidingly arranged in the recess, and the protrusion is fixedly connected with the side wall of the steel sheet pile adjacent thereto.

[0015] Optionally, a buffer pad is arranged between the output end of each second push cylinder and the connecting shaft.

[0016] In summary, compared with the prior art, the beneficial effects of the present scheme are:

[0017] (1) The utility model discloses a rotating ring groove, a rotating ring and a first push cylinder and other components are arranged, when installing the surrounding purlin, the rotating ring can be rotated, two first push cylinders are driven until the end of any first push cylinder contacts the bottom surface of the foundation pit, then the telescopic first push cylinder output end drives the rotating ring groove and the surrounding purlin to move vertically, thereby effectively improving the convenience of surrounding purlin height adjustment, when installing multiple surrounding purlins in the vertical direction, the rotating ring can also be rotated, the first push cylinder output end supports the upper surrounding purlin lower end surface, and the distance between the two surrounding purlins is adjusted by controlling the length of the first push cylinder output end, thereby more accurately and conveniently adjusting the steel sheet pile supporting position of the surrounding purlin, effectively saving labor, improving the precision of the entire surrounding purlin support structure, and the first push cylinder output end can also be clamped with the clamping groove on the surrounding purlin side wall through the clamping support plate, effectively preventing the surrounding purlin from deforming under the extrusion of the foundation pit side wall and the steel sheet pile, and improving the stability of the surrounding purlin support structure.

[0018] (2) The utility model discloses a rotating connecting plate, a second push cylinder, a fourth rotating connecting piece and other structures are arranged, when the multiple second push cylinder output ends support the adjacent surrounding purlin and connecting shaft, the two opposite second push cylinders are first rotated to the vertical downward state, forming the support between the ground and the rotating connecting plate, the rotating connecting plate is moved to the same horizontal plane of the multiple surrounding purlins by the second push cylinder output end, then the multiple second push cylinders are rotated and the second push cylinder output end is elongated to abut against the one end of the adjacent connecting shaft, thereby forming the horizontal fixation of the rotating connecting plate, thereby more conveniently fixing the horizontal position of the rotating connecting plate, improving the precision of the horizontal support of the multiple second push cylinders on the adjacent surrounding purlin, and saving labor.

[0019] (3) The utility model discloses a buffer pad, when the second push cylinder abuts against the connecting shaft, the buffer pad can absorb the support force of the second push cylinder output end on the connecting shaft through the elastic deformation of the buffer pad, when the steel sheet pile and the surrounding purlin deform with the side wall of the foundation pit, the second push cylinder output end and the connecting shaft are reversely supported through the elastic deformation of the buffer pad, thereby effectively improving the support effect of the multiple second push cylinders on the surrounding purlin and the steel sheet pile. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the perspective view of the utility model;

[0021] Figure 2 is a perspective view of part of the assembly of the utility model;

[0022] Figure 3 is Figure 2 is a partial enlarged view of A in the middle;

[0023] Figure 4 is Figure 2 is a partial enlarged view of B in the middle;

[0024] Figure 5 is a perspective view of the connecting shaft part;

[0025] Figure 6 is a connecting structure diagram of the steel sheet pile.

[0026] In the figure: steel sheet pile 10, enclosing purlin 11, connecting shaft 12, rotating ring groove 13, rotating ring 14, first rotating connecting piece 15, first push cylinder 16, second rotating connecting piece 17, third rotating connecting piece 18, clamping support plate 19, clamping groove 20, rotating connecting plate 21, second push cylinder 22, buffer pad 23, rotating clamping groove 24, fourth rotating connecting piece 25, clamping piece 26, clamping sliding groove 27, recess 28, protrusion 29, loose screw 30. DETAILED DESCRIPTION

[0027] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.

[0028] Embodiment one:

[0029] As Figure 1 , Figure 2 and Figure 5 indicate, a kind of enclosing purlin support structure for foundation pit construction, including multiple mutually clamped steel sheet piles 10, multiple steel sheet piles 10 inside annularly and uniformly multiple enclosing purlins 11 are provided with, multiple enclosing purlins 11 between being provided with rotating connecting plate 21, rotating connecting plate 21 every outer side wall is all rotatingly provided with second push cylinder 22, the output end of every second push cylinder 22 is all provided with connecting shaft 12, every connecting shaft 12 is fixedly connected with the side wall of its adjacent enclosing purlin 11, every connecting shaft 12 both sides are all rotatingly provided with one first push cylinder 16, the output end of every first push cylinder 16 and its adjacent enclosing purlin 11 side wall are mutually clamped.

[0030] Specifically, enclosing purlin 11 can be selected according to the length of actual foundation pit size, and the number of enclosing purlin 11 in vertical direction needs to be selected according to the depth of foundation pit, and the distance between multiple enclosing purlins 11 in vertical direction is adjusted.

[0031] The first pushing cylinder 16 is a hydraulic pushing cylinder with self-locking function, which is prior art; when installing the support of the surrounding purlin 11, the surrounding purlins 11 should be installed from bottom to top, and the staff can rotate the first pushing cylinder 16 along the annular groove 13 as the center, so that the output end of the first pushing cylinder 16 is in contact with the bottom of the foundation pit, and the distance between the surrounding purlin 11 and the bottom of the foundation pit is controlled by the extension and retraction of the output end of the first pushing cylinder 16, and so on, when the surrounding purlin 11 at the upper end is installed in turn, the upper end surface of the surrounding purlin 11 below the surrounding purlin 11 can be supported by the output end of the first pushing cylinder 16, and the output end of the first pushing cylinder 16 drives the connecting shaft 12 and the surrounding purlin 11 to move vertically, so that the distance between the two surrounding purlins 11 meets the requirements of the support, thereby improving the support strength of the foundation pit, and the two first pushing cylinders 16 can be rotated to further support the side walls of the surrounding purlins 11 on both sides of the connecting shaft 12 by the output ends of the two first pushing cylinders 16, so that the two first pushing cylinders 16 cooperate with the connecting shaft 12 to form a triangular support for the surrounding purlin 11, effectively improving the support stability of the surrounding purlin 11.

[0032] The second pushing cylinder 22 is a hydraulic pushing cylinder with self-locking function, which is prior art; when horizontally supporting the opposite two surrounding purlins 11 on the same plane, two opposite second pushing cylinders 22 of the plurality of second pushing cylinders 22 can be rotated, so that the output ends of the two second pushing cylinders 22 are in contact with the bottom of the foundation pit and form a support between the rotating connecting plate 21 and the bottom of the foundation pit, at this time, the extension and retraction of the output end of the second pushing cylinder 22 can adjust the distance between the rotating connecting plate 21 and the bottom surface of the foundation pit, until the rotating connecting plate 21 and the plurality of surrounding purlins 11 that need to be supported are on the same horizontal plane, and the plurality of second pushing cylinders 22 except the two second pushing cylinders 22 for supporting form a support for the plurality of surrounding purlins 11, and subsequently, the two second pushing cylinders 22 for supporting the bottom of the foundation pit can be rotated to support the remaining two surrounding purlins 11.

[0033] When other rotating connecting plates 21 and a plurality of second pushing cylinders 22 are supported subsequently, the output ends of two opposite second pushing cylinders 22 can be supported on the upper end surface of the rotating connecting plate 21 below, thereby supporting the plurality of surrounding purlins 11 at different horizontal heights.

[0034] The above structure can effectively and accurately install and support the plurality of surrounding purlins 11 at different horizontal heights, and the surrounding purlin support structure does not affect the construction during subsequent in-situ pouring construction of the foundation pit, and can be removed layer by layer, thereby improving the convenience of construction.

[0035] Further, as Figure 2As shown, the rotating connecting plate 21 is provided with a rotating clamping groove 24 on each side wall, and a fourth rotating connecting piece 25 is rotatably arranged in each rotating clamping groove 24. Each fourth rotating connecting piece 25 is fixedly connected to one end of the second push cylinder 22 adjacent thereto.

[0036] Further, as shown in Figure 2 and Figure 3 , the outer circular surface of the rotating ring 14 is provided with a rotating ring groove 13, and two rotating rings 14 are rotatably arranged in the rotating ring groove 13. The two ends of the two rotating rings 14 are rotatably provided with a first rotating connecting piece 15. The side wall of the first rotating connecting piece 15 is fixedly connected to one end of the first push cylinder 16. A plurality of rotating rings 14 and the first rotating connecting piece 15 are rotatably connected by a tension screw 30.

[0037] Specifically, the two rotating rings 14 form a clamping of the rotating ring groove 13, and the two rotating rings 14 can rotate in the rotating ring groove 13, thereby driving the first rotating connecting piece 15 and the first push cylinder 16 connected thereto to rotate. The two first rotating connecting pieces 15 and the two rotating rings 14 are connected by bolts, facilitating the disassembly and installation of the rotating ring 14, the first rotating connecting piece 15 and the first push cylinder 16. The rotation and fixation of the first rotating connecting piece 15 and the first push cylinder 16 can also be adjusted by adjusting the tightness of the bolts connecting the rotating ring 14 and the first rotating connecting piece 15.

[0038] Further, as shown in Figure 6 , one end of each steel sheet pile 10 is provided with a clamping piece 26. The side wall of the clamping piece 26 is provided with a clamping sliding groove 27. The inner side wall of each clamping sliding groove 27 is provided with a groove 28. The inner side wall of each groove 28 is slidably provided with a protrusion 29. Each protrusion 29 is fixedly connected to the side wall of the steel sheet pile 10 adjacent thereto.

[0039] Specifically, when the two steel sheet piles 10 are clamped, the protrusion 29 at one end of the steel sheet pile 10 can be slidably clamped in the groove 28 at one end of the steel sheet pile 10, effectively increasing the convenience of installation and disassembly, and also increasing the diversity of connection between multiple steel sheet piles 10.

[0040] Further, as shown in Figure 2 and Figure 4 , the side wall of the surrounding purlin 11 is provided with a plurality of clamping grooves 20. The clamping grooves 20 are slidably provided with a clamping support plate 19. The end surface of the clamping support plate 19 is provided with a third rotating connecting piece 18. The third rotating connecting piece 18 is rotatably connected to a second rotating connecting piece 17. The side wall of the second rotating connecting piece 17 is fixedly connected to the output end of the first push cylinder 16.

[0041] Specifically, the setting of the clamping support plate 19 and the clamping groove 20 makes the connection and support between the output end of the first push cylinder 16 and the side wall of the enclosing purlin 11 more stable, and also improves the convenience of clamping installation between the output end of the first push cylinder 16 and the side wall of the enclosing purlin 11.

[0042] Through the setting of multiple clamping grooves 20, the clamping support plate 19 can be clamped in the corresponding clamping groove 20 according to the actual support position requirement of the output end of the first push cylinder 16 to the enclosing purlin 11, so as to form the support of the output end of the first push cylinder 16 to the side wall of the enclosing purlin 11, and further make the whole support structure more stable.

[0043] Firstly, multiple steel sheet piles 10 are installed according to the size of the foundation pit to form the basic protection of the foundation pit, and then the enclosing purlin 11 with appropriate length is selected according to the size of the foundation pit, the two rotating rings 14 are installed in the rotating ring groove 13, the first rotating connecting piece 15 and the first push cylinder 16 are installed at both ends of the two rotating rings 14 and are fixed through the elastic screw 30. First, rotate the two first push cylinders 16, so that the clamping support plate 19 installed on one of the first push cylinders 16 is supported on the inner bottom surface of the foundation pit, and then start the first push cylinder 16 to make the output end of the first push cylinder 16 drive the connecting shaft 12 and the enclosing purlin 11 to move vertically along the side wall of the foundation pit until the enclosing purlin 11 moves to the preset horizontal position, and in this way, the bottom layer of multiple enclosing purlins 11 is set.

[0044] Then, rotate the multiple second push cylinders 22 on the rotating connecting plate 21 to make the multiple second push cylinders 22 contact with the inner bottom surface of the foundation pit, start the multiple second push cylinders 22 to make the rotating connecting plate 21 move to the same horizontal plane of the multiple enclosing purlins 11 that need to be supported, and then rotate the two opposite second push cylinders 22 in turn to make the output ends of the two second push cylinders 22 drive the buffer pad 23 to contact with the connecting shaft 12 on the enclosing purlin 11 that needs to be supported, and then start the two second push cylinders 22 to make the output ends of the second push cylinders 22 form the extrusion of the buffer pad 23 and further form the support of the connecting shaft 12 and the enclosing purlin 11, and rotate the remaining multiple opposite second push cylinders 22 in turn to support the adjacent enclosing purlins 11.

[0045] Finally, rotate the rotating ring 14, the first rotating connecting piece 15 and the first push cylinder 16 on each enclosing purlin 11 in turn to make the two first push cylinders 16 in a horizontal state, start the two first push cylinders 16, and the output ends of the two first push cylinders 16 drive the clamping support plate 19 to move to one side of the clamping groove 20 that needs to be clamped, then clamp the clamping support plate 19 into the clamping groove 20, and further start the first push cylinder 16 to make the output end of the first push cylinder 16 drive the clamping support plate 19 to form further support to the enclosing purlin 11.

[0046] Example two:

[0047] On the basis of Embodiment One, further embodiments are made, as shown in Figure 3 A buffer pad 23 is arranged between the output end of each second push cylinder 22 and the connecting shaft 12.

[0048] Specifically, the buffer pad 23 is made of an elastic material capable of elastic deformation. When the second push cylinder 22 supports the side wall of the connecting shaft 12, the output end of the second push cylinder 22 will first extrude and deform the buffer pad 23. Since the side wall of the foundation pit is made of soil or rock stratum, etc., which is relatively soft and may deform over time, the deformation of the plurality of surrounding purlins 11 under the support of the plurality of second push cylinders 22 may cause the support of the plurality of second push cylinders 22 to the surrounding purlins 11 to loosen. At this time, the elastic deformation of the buffer pad 23 can be used to ensure the support connection between the second push cylinder 22 and the surrounding purlin 11, effectively improving the stability of the support structure.

[0049] As some terms are used in the description and claims, those skilled in the art can understand that hardware manufacturers may use different names to refer to the same component. The description and claims of the present specification do not distinguish components by name differences, but by functional differences. As mentioned throughout the description and claims, "comprising" is an open term, so it should be interpreted as "comprising but not limited to". "Approximately" means within an acceptable error range, and those skilled in the art can solve the technical problems within a certain error range and basically achieve the technical effects.

[0050] It should be noted that the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the products or systems comprising a series of elements not only include those elements, but also include other elements not explicitly listed or inherent to such products or systems. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the product or system comprising the element.

[0051] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified by the above teachings or related art or knowledge within the scope of the application conceived herein. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. A bracing structure for a foundation pit construction comprising a plurality of steel sheet piles (10) which are mutually engaged, characterized in that, The plurality of steel sheet piles (10) are uniformly provided with a plurality of surrounding purlins (11) in a ring shape, a rotating connecting plate (21) is arranged between the plurality of surrounding purlins (11), a second push cylinder (22) is rotatably arranged on each outer side wall of the rotating connecting plate (21), a connecting shaft (12) is arranged at the output end of each second push cylinder (22), each connecting shaft (12) is fixedly connected with the side wall of the surrounding purlin (11) adjacent thereto, and a first push cylinder (16) is rotatably arranged on both sides of each connecting shaft (12), and the output end of each first push cylinder (16) is clamped with the side wall of the surrounding purlin (11) adjacent thereto.

2. The bracing structure according to claim 1, wherein A rotating ring groove (13) is arranged on the outer circular surface of the connecting shaft (12), two rotating rings (14) are rotatably arranged on the rotating ring groove (13), first rotating connecting pieces (15) are rotatably arranged at both ends of the two rotating rings (14), and one side wall of the first rotating connecting piece (15) is fixedly connected with one end of the first push cylinder (16).

3. The bracing structure according to claim 2, wherein A plurality of clamping grooves (20) are arranged on the side wall of the surrounding purlin (11), a clamping support plate (19) is slidably arranged in the clamping groove (20), a third rotating connecting piece (18) is arranged on the end face of the clamping support plate (19), a second rotating connecting piece (17) is rotatably connected on the outside of the third rotating connecting piece (18), and one side wall of the second rotating connecting piece (17) is fixedly connected with the output end of the first push cylinder (16).

4. The bracing structure according to claim 2, wherein Loose screws (30) are rotatably connected between the plurality of rotating rings (14) and the first rotating connecting pieces (15).

5. The bracing structure according to claim 1, wherein A rotating clamping groove (24) is arranged on each side wall of the rotating connecting plate (21), a fourth rotating connecting piece (25) is rotatably arranged in each rotating clamping groove (24), and each fourth rotating connecting piece (25) is fixedly connected with one end of the second push cylinder (22) adjacent thereto.

6. The bracing structure according to claim 1, wherein A clamping piece (26) is arranged at one end of each steel sheet pile (10), a clamping sliding groove (27) is arranged on the side wall of the clamping piece (26), a recess (28) is arranged on the inner side wall of each clamping sliding groove (27), a protrusion (29) is slidably arranged in each recess (28), and each protrusion (29) is fixedly connected with the side wall of the steel sheet pile (10) adjacent thereto.

7. The bracing structure according to claim 1, wherein A buffer pad (23) is arranged between the output end of each second push cylinder (22) and the connecting shaft (12).

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