Safety supporting device and method for pipeline foundation trench

Abstract

The invention provides a safe supporting device and method for a pipeline foundation trench, the device comprises a first supporting plate and a second supporting plate which are oppositely arranged, and the first supporting plate and the second supporting plate are at least connected through a first stiffening assembly located between the first supporting plate and the second supporting plate; the first stiffening assembly can stretch out and draw back to change the distance between the first supporting plate and the second supporting plate. The safety supporting device is simple in structure, the functions of supporting, fastening, assembling and the like are integrated, stiffening supporting is conducted on the positions, at different heights, of the first supporting plate and the second supporting plate, and the problems that in the foundation trench excavation process, the supporting plates incline, the foundation trench collapses and the like due to the fact that pile loads on the two sides are too large and stress is concentrated can be effectively prevented and controlled; the safety supporting device is easy to assemble and disassemble, high in construction efficiency and capable of being repeatedly used.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation trench support, and in particular to a safety support device and a support method for a pipeline foundation trench. Background Art

[0002] The installation of municipal pipelines is mainly based on trenching construction. During the construction process, due to the limitations of the construction area, the excavation of the pipeline foundation trench does not have the conditions for slope reduction, and most of the excavation is vertical. The selection of construction machinery is also limited by the construction area. Most of the construction is carried out in small construction sections. The stability of the foundation trench in parts with poor soil quality cannot be guaranteed, and the foundation trench needs to be supported to prevent collapse accidents.

[0003] For working environments with good geological conditions and shallow foundation pit excavation depth, wooden piles are generally used for support. When supporting the wooden piles, the wooden piles are lowered vertically into the foundation pit, with the board surface pressed against the side wall of the foundation pit, and special machinery is used to press the piles, pressing the bottom of the wooden piles into the soil at the bottom of the foundation pit. However, there are no reinforcement measures for other parts of the wooden piles. When there is soil accumulation on both sides of the soil above the foundation pit, vehicles pass by, or vibrating machinery operates, it is easy to cause the top of the support plate to tilt toward the center of the foundation pit, causing safety hazards in construction operations in the foundation pit. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety support device and support method for a pipeline foundation trench, so as to solve the deficiencies in the above-mentioned background technology.

[0005] The technical solution of the present invention is: a safety support device for a pipeline base trench, which includes a first support plate and a second support plate arranged opposite to each other, the first support plate and the second support plate are connected by at least a first stiffening component located therebetween, and the first stiffening component is telescopic to change the spacing between the first support plate and the second support plate.

[0006] Furthermore, the first stiffening assembly includes a bidirectional screw, which is provided with two groups of external threads with opposite rotation directions, and the two groups of external threads are respectively threaded with a first transmission member and a second transmission member, and the two sides of the first transmission member are respectively rotatably connected to the first support plate and the second support plate through different first stiffening rods, and the two sides of the second transmission member are respectively rotatably connected to the first support plate and the second support plate through different second stiffening rods; relative to the cross-section of the bidirectional screw, the inclination direction of the first stiffening rod and the second stiffening rod are opposite.

[0007] Furthermore, a driving portion is provided at the top end of the bidirectional screw, and a driving member mounting hole extending along the radial direction of the bidirectional screw is provided on the driving portion.

[0008] Furthermore, the first supporting plate and the second supporting plate are respectively provided with a first mounting member and a second mounting member, and the two ends of the first stiffening rod are respectively pivotally connected to the first transmission member and the first mounting member; the two ends of the second stiffening rod are respectively pivotally connected to the second transmission member and the second mounting member; the first mounting member is located above the second mounting member.

[0009] Furthermore, a first C-shaped rail and a second C-shaped rail are respectively constructed on the facing surfaces of the first supporting plate and the second supporting plate for installing the first mounting member and the second mounting member; the openings of the first C-shaped rail and the second C-shaped rail are opposite to each other, and the extension directions of the two are respectively parallel to the axis of the bidirectional screw.

[0010] Furthermore, the first mounting member and the second mounting member located on the same side of the bidirectional screw are connected by a sliding member, and the sliding member is slidably arranged in the first C-shaped rail or the second C-shaped rail. The sliding member, the first C-shaped rail and the second C-shaped rail are respectively provided with a plurality of positioning pin holes of different heights, and the sliding member and the first C-shaped rail, and the sliding member and the second C-shaped rail are respectively connected by positioning bolts located in the positioning pin holes.

[0011] Furthermore, a second stiffening assembly is arranged between the first supporting plate and the second supporting plate, and the second stiffening assembly includes a bidirectional threaded sleeve, and the bidirectional threaded sleeve is provided with two groups of internal threads with opposite rotation directions. The two groups of internal threads are respectively threaded with a third stiffening rod and a fourth stiffening rod, and the separated ends of the third stiffening rod and the fourth stiffening rod are respectively pressed against the first supporting plate and the second supporting plate.

[0012] The technical solution of the present invention also includes: a method for supporting a pipeline foundation trench using the above-mentioned safety support device, which includes the steps of:

[0013] Place the first supporting plate and the second supporting plate into the pipeline base trench;

[0014] The first stiffening assembly and the second stiffening assembly are extended to move the first supporting plate and the second supporting plate away from each other until they respectively press against the two side walls of the pipeline base groove.

[0015] Furthermore, when the first stiffening assembly is extended, the bidirectional screw is rotated to simultaneously increase the angle between the first stiffening rod and the bidirectional screw and the angle between the second stiffening rod and the bidirectional screw.

[0016] Furthermore, when the second stiffening assembly is extended, the bidirectional threaded sleeve is rotated to move the third stiffening rod and the fourth stiffening rod away from each other.

[0017] The beneficial effects of the present invention are as follows: the safety support device of the present invention has a simple structure, and integrates the functions of support, fastening, and assembly. The first support plate and the second support plate are reinforced at different heights respectively, which can effectively prevent and control the problems of tilting of the support plates and collapse of the foundation pit caused by excessive loading and concentrated force on both sides during the excavation of the foundation pit; the safety support device is easy to install and disassemble, has high construction efficiency and is reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural diagram of an embodiment of the present invention;

[0019] Figure 2 is a front view of the first stiffening assembly and the second stiffening assembly in an embodiment of the present invention;

[0020] Figure 3 It is a top view of the connection between the first stiffening assembly, the first C-shaped rail and the second C-shaped rail in an embodiment of the present invention.

[0021] In the picture:

[0022] 1. The first support plate;

[0023] 2. Second support plate;

[0024] 3. First stiffening assembly; 31. Bidirectional screw; 32. First transmission member; 33. Second transmission member; 34. First stiffening rod; 35. Second stiffening rod; 36. Driving unit; 361. Driving member mounting hole; 37. First mounting member; 38. Second mounting member; 39. Sliding member;

[0025] 4. Second stiffening assembly; 41. Bidirectional threaded sleeve; 42. Third stiffening rod; 43. Fourth stiffening rod;

[0026] 5. First C-shaped rail;

[0027] 6. Second C-shaped rail;

[0028] 7. Positioning pin hole;

[0029] 8. Positioning bolts. DETAILED DESCRIPTION

[0030] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0032] Reference Attachment Figure 1-2 The present invention provides a safety support device for a pipeline foundation trench, which includes a first support plate 1 and a second support plate 2 arranged opposite to each other. The first support plate 1 and the second support plate 2 are connected by a first stiffening assembly 3 and a second stiffening assembly 4 located therebetween. The first stiffening assembly 3 and the second stiffening assembly 4 can both change the distance between the first support plate 1 and the second support plate 2 by telescoping. When the separated sides of the first support plate 1 and the second support plate 2 respectively abut against an immovable object (such as the side wall of the pipeline foundation trench), the first stiffening assembly 3 and the second stiffening assembly 4 can apply an extrusion force to the first support plate and the second support plate, so that the first support plate and the second support plate are respectively pressed against the above-mentioned "immovable object".

[0033] When supporting the pipeline foundation trench, the first supporting plate 1 and the second supporting plate 2 are placed in the pipeline foundation trench so that the first supporting plate 1 and the second supporting plate 2 are respectively close to (or abut) the two side walls of the pipeline foundation trench. In the absence of external extrusion, there is a small gap between the side walls of the pipeline foundation trench and the first supporting plate 1 or the second supporting plate 2. At this time, the first stiffening component 3 and the second stiffening component 4 are extended so that the first supporting plate 1 and the second supporting plate 2 are moved away from each other until they are respectively pressed against the two side walls of the pipeline foundation trench. When the two sides above the pipeline foundation trench are subjected to gravity load or vibration disturbance and the force is concentrated, the soil on the side walls of the pipeline foundation trench will squeeze the first supporting plate 1 and the second supporting plate 2, causing it to have a tilting tendency. However, since the first stiffening component 3 and the second stiffening component 4 support the two supporting plates, the tilting of the first supporting plate 1 and the second supporting plate 2 can be reduced or avoided, thereby avoiding the collapse accident of the pipeline foundation trench and reducing the working risks of the construction workers in the foundation trench.

[0034] In this embodiment, the first stiffening assembly 3 and the second stiffening assembly 4 are distributed at different heights, respectively providing stable support to different parts of the first support plate 1 and the second support plate 2 on both sides. Figure 1-2The first stiffening assembly 3 is located above the second stiffening assembly 4 and is used to support the upper part of the first support plate 1 and the second support plate 2. It specifically includes the following structures: a bidirectional screw 31, a first transmission member 32, a second transmission member 33, a first stiffening rod 34 and a second stiffening rod 35. The bidirectional screw 31 is vertically arranged, and a driving part 36 is arranged on its top. The driving part 36 is provided with a driving member mounting hole 361 extending along the radial direction of the bidirectional screw 31. When the driving member (such as a driving rod, not shown in the figure) is passed through the driving member mounting hole 361, the driving member is rotated around the axis of the bidirectional screw 31 to drive the bidirectional screw 31 to rotate; the bidirectional screw 31 is provided with two sets of external threads with opposite rotation directions. The first transmission member 3 2 and the second transmission member 33 are respectively connected with two groups of external threads. The specific implementation scheme is to respectively construct screw holes with opposite rotation directions on the first transmission member 32 and the second transmission member 33, and respectively install them on the bidirectional screw 31 from the axial ends of the bidirectional screw 31; the two sides of the first transmission member 32 are respectively rotatably connected to the first support plate 1 and the second support plate 2 through different first stiffening rods 34, and the two sides of the second transmission member 33 are respectively rotatably connected to the first support plate 1 and the second support plate 2 through different second stiffening rods 35; relative to the cross-section of the bidirectional screw 31, the inclination direction of the first stiffening rod 34 and the second stiffening rod 35 are opposite, that is, the two groups of first stiffening rods 34 are connected in a positive V shape, and the two groups of second stiffening rods 35 are connected in an inverted V shape.

[0035] When the driving member is installed on the driving part 36 and the bidirectional screw 31 is rotated, the first transmission member 32 and the second transmission member 33 will move toward each other or away from each other. When moving toward each other, the angle formed by the two groups of first stiffening rods 34 decreases, and the angle formed by the two groups of second stiffening rods 35 decreases, so that the distance between the first support plate 1 and the second support plate 2 decreases. When moving away from each other, the angle formed by the two groups of first stiffening rods 34 increases, and the angle formed by the two groups of second stiffening rods 35 increases, so that the distance between the first support plate 1 and the second support plate 2 increases, or the first support plate 1 and the second support plate 2 are respectively pressed against the side walls of the pipeline base groove.

[0036] One feasible way of the above technical solution is that the first supporting plate 1 and the second supporting plate 2 are respectively provided with a first mounting member 37 and a second mounting member 38, the two ends of the first stiffening rod 34 are respectively pivotally connected to the first transmission member 32 and the first mounting member 37; the two ends of the second stiffening rod 35 are respectively pivotally connected to the second transmission member 33 and the second mounting member 38; the first mounting member 37 is located above the second mounting member 38. The first mounting member 37 and the second mounting member 38 can be respectively configured in block shape, sheet shape, etc., and the number is configured according to their shape and installation requirements, which is not specifically limited here. For example, the attached Figure 1The first mounting member 37 and the second mounting member 38 are respectively in the shape of plates, and two are respectively arranged on both sides of the first stiffening rod 34 or the second stiffening rod 35, and are connected by a pivot passing through the first mounting member 37 and the first stiffening rod 34, and through the second mounting member 38 and the second stiffening rod 35.

[0037] The materials of the first transmission member 32 and the second transmission member 33 can also be configured according to actual conditions. For example, channel steel can be used, and the first stiffening rod 34 or the second stiffening rod 35 can be pivotally connected to the two side wings of the channel steel. Holes are punched on the inner side of the web of the channel steel and nuts are welded to serve as the installation and connection part of the bidirectional screw 31.

[0038] The first mounting member 37 and the second mounting member 38 can be fixed to the first supporting plate 1 and the second supporting plate 2 throughout the entire process from production to use, or they can be not fixed during production, but the force application points on the first supporting plate 1 and the second supporting plate 2 are determined at the construction site based on the depth of the pipeline foundation pit, soil conditions, etc., and then fixed.

[0039] In some feasible solutions, first and second C-shaped rails 5 and 6 are respectively configured on the facing surfaces of the first and second support plates 1 and 2 for mounting first and second mounting members 37 and 38. The openings of the first and second C-shaped rails 5 and 6 face each other, and their extension directions are parallel to the axis of the bidirectional screw 31. The first and second mounting members 37 and 38 located on the same side of the bidirectional screw 31 can slide vertically in the first C-shaped rail 5, while the first and second mounting members 37 and 38 located on the other side of the bidirectional screw 31 can slide vertically in the second C-shaped rail 6. After the positions are determined, welding or pinning is applied to fix the parts, and then the bidirectional screw 31, the first stiffening rod 34, and the second stiffening rod 35 are used to provide support.

[0040] However, the parts are trivial and not convenient for quick support. Therefore, in other better solutions: the first mounting part 37 and the second mounting part 38 located on the same side of the bidirectional screw 31 are connected by a sliding part 39, and the two are fixed on the sliding part 39 by welding or other means. The sliding part 39 on one side of the bidirectional screw 31 is slidably arranged in the first C-shaped rail 5, and the sliding part 39 on the other side of the bidirectional screw 31 is slidably arranged in the second C-shaped rail 6. The sliding part 39, the first C-shaped rail 5 and the second C-shaped rail 6 are respectively provided with a number of positioning pin holes 7 of different heights. After the force application point of the first stiffening assembly 3 on the first support plate 1 and the second support plate 2 is determined according to the soil conditions and the depth of the foundation trench, the positioning bolts 8 are passed through the positioning pin holes 7 on the sliding part 39 and the first C-shaped rail 5 at this time, and another set of positioning bolts 8 are passed through the positioning pin holes 7 on the other set of sliding parts 39 and the second C-shaped rail 6 at this time, so as to realize the quick positioning connection of the first stiffening assembly 3, the first support plate 1 and the second support plate 2.

[0041] The configuration of the sliding member 39 can be determined according to actual needs, for example, Figure 3 You can choose a channel steel commonly used on the construction site, connect the web of the channel steel to the first mounting member 37 and the second mounting member 38, drill positioning pin holes 7 on the wing plate of the channel steel, and slide the wing plate of the channel steel into the first C-shaped rail 5 or the second C-shaped rail.

[0042] Reference Attachment Figure 2 The second reinforcing assembly 4 is used to support the lower portion of the first and second support plates 1 and 2, and specifically includes the following structure: a bidirectional threaded sleeve 41, a third reinforcing rod 42, and a fourth reinforcing rod 43. The bidirectional threaded sleeve 41 is horizontally arranged and has two sets of internal threads with opposite rotation directions. The third and fourth reinforcing rods 42 and 43 are respectively threaded onto the two sets of internal threads. The separated ends of the third and fourth reinforcing rods 42 and 43 respectively press against the first and second support plates 1 and 2. By rotating the bidirectional threaded sleeve 41, the third and fourth reinforcing rods 42 and 43 can be moved toward or away from each other. When moving toward each other, the pressing force on the first and second support plates 1 and 2 is released. When moving away from each other, the first and second support plates 1 and 2 can be pressed against each other, providing stable support for the pipeline base trench.

[0043] The separated ends of the third stiffening rod 42 and the fourth stiffening rod 43 abut the first support plate 1 and the second support plate 2 respectively. Of course, they can also be inserted into the first C-shaped rail 5 and the second C-shaped rail 6, abutting the first C-shaped rail 5 and the second C-shaped rail 6 respectively. During support, the horizontality of the second stiffening assembly 4 can be ensured by using an external level ruler or the like to improve the support stability.

[0044] In the support method provided by an embodiment of the present invention: when extending the first stiffening component 3, the bidirectional screw 31 is rotated to simultaneously increase the angle between the first stiffening rod 34 and the bidirectional screw 31, and the angle between the second stiffening rod 35 and the bidirectional screw 31, so as to increase the distance between the first support plate 1 and the second support plate 2, or respectively press the first support plate 1 and the second support plate 2 against the side wall of the pipeline base trench; when extending the second stiffening component 4, the bidirectional threaded sleeve 41 is rotated to make the third stiffening rod 42 and the fourth stiffening rod 43 move away from each other, so as to increase the distance between the first support plate 1 and the second support plate 2, or respectively press the first support plate 1 and the second support plate 2 against the side wall of the pipeline base trench.

[0045] The embodiment of the present invention does not impose any specific limitation on the number of the first stiffening components 3 and the second stiffening components 4 , and the number can be determined based on soil conditions, foundation pit depth, and other conditions during construction.

[0046] Compared with the prior art, the beneficial effects of the present invention include: the safety support device in the present invention has a simple structure, integrating support, fastening, assembly and other functions, and provides reinforced support for the first support plate 1 and the second support plate 2 at different heights, which can effectively prevent and control the problems of tilting of the support plates and collapse of the foundation pit caused by excessive loading on both sides and concentrated force during the foundation pit excavation process; the safety support device is easy to install and disassemble, has high construction efficiency and is reusable.

[0047] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A safety support device for a pipeline foundation trench, characterized in that: The first supporting plate and the second supporting plate are connected at least by a first stiffening assembly located therebetween. The first stiffening assembly is telescopic to change the distance between the first supporting plate and the second supporting plate.

2. The safety support device for pipeline foundation trench according to claim 1 is characterized in that: The first stiffening assembly includes a bidirectional screw, which is provided with two groups of external threads with opposite rotation directions. The two groups of external threads are respectively connected with a first transmission member and a second transmission member. The two sides of the first transmission member are respectively connected to the first support plate and the second support plate through different first stiffening rods, and the two sides of the second transmission member are respectively connected to the first support plate and the second support plate through different second stiffening rods; relative to the cross-section of the bidirectional screw, the inclination directions of the first stiffening rod and the second stiffening rod are opposite.

3. The safety support device for pipeline foundation trench according to claim 2, characterized in that: A driving portion is arranged at the top end of the bidirectional screw, and a driving member mounting hole extending along the radial direction of the bidirectional screw is arranged on the driving portion.

4. The safety support device for pipeline foundation trench according to claim 2 or 3, characterized in that: The first supporting plate and the second supporting plate are respectively provided with a first mounting member and a second mounting member. The two ends of the first stiffening rod are respectively pivotally connected to the first transmission member and the first mounting member; the two ends of the second stiffening rod are respectively pivotally connected to the second transmission member and the second mounting member; the first mounting member is located above the second mounting member.

5. The safety support device for pipeline foundation trench according to claim 4, characterized in that: The first and second C-shaped rails are respectively arranged on the facing surfaces of the first supporting plate and the second supporting plate for installing the first mounting member and the second mounting member; the openings of the first and second C-shaped rails are opposite to each other, and the extension directions of the two are respectively parallel to the axis of the bidirectional screw.

6. The safety support device for pipeline foundation trench according to claim 5, characterized in that: The first mounting member and the second mounting member located on the same side of the bidirectional screw are connected by a sliding member, and the sliding member is slidably arranged in the first C-shaped rail or the second C-shaped rail. The sliding member, the first C-shaped rail and the second C-shaped rail are respectively provided with a plurality of positioning pin holes of different heights. The sliding member and the first C-shaped rail, and the sliding member and the second C-shaped rail are respectively connected by positioning bolts located in the positioning pin holes.

7. The safety support device for pipeline foundation trench according to any one of claims 1-3, 5-6, characterized in that: A second stiffening assembly is arranged between the first supporting plate and the second supporting plate, and the second stiffening assembly includes a bidirectional threaded sleeve, and the bidirectional threaded sleeve is provided with two groups of internal threads with opposite rotation directions. A third stiffening rod and a fourth stiffening rod are respectively threadedly connected to the two groups of internal threads, and the separated ends of the third stiffening rod and the fourth stiffening rod are respectively pressed against the first supporting plate and the second supporting plate.

8. A method for supporting a pipeline foundation trench using the safety support device according to claim 7, characterized in that: Including steps: Place the first supporting plate and the second supporting plate into the pipeline base trench; The first stiffening assembly and the second stiffening assembly are extended to move the first supporting plate and the second supporting plate away from each other until they respectively press against the two side walls of the pipeline base groove.

9. The method for supporting a pipeline foundation trench using a safety support device according to claim 8, characterized in that: When the first stiffening assembly is extended, the bidirectional screw is rotated to simultaneously increase the angle between the first stiffening rod and the bidirectional screw and the angle between the second stiffening rod and the bidirectional screw.

10. The method for supporting a pipeline foundation trench using a safety support device according to claim 8 or 9, characterized in that: When the second stiffening assembly is extended, the bidirectional threaded sleeve is rotated to move the third stiffening rod and the fourth stiffening rod away from each other.

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