A mobile trench support device and prefabricated pipeline laying water construction method

Abstract

The present invention is a mobile trench support device and a prefabricated pipeline laying water flow construction method, comprising a support plate group, a steel ladder, a steel cross brace, a pin shaft, and a steel wire rope. Two support plate groups are symmetrically arranged, the front side and the bottom end of the support plate group are blade-shaped, the steel ladder is arranged on the inner side of one support plate group, and a plurality of pairs of cross brace connectors are correspondingly arranged on the opposite surfaces of the two support plate groups. The cross brace connectors and the steel cross brace are plugged and fixed by a pin shaft. A steel wire rope clamping column is arranged on the cross brace connector located at the top of the front side of the support plate group, and the two ends of the steel wire rope are respectively bolted to the two cross brace connectors with the steel wire rope clamping column, and are limited by the steel wire rope clamping column, and the middle part of the steel wire rope is connected to the traction equipment. The present invention can be moved as a whole, circulated and utilized, avoids repeated disassembly and transportation, greatly improves the construction efficiency, and ensures the construction safety and quality; for the prefabricated pipeline laying construction above the groundwater level, the construction site area is reduced, and the impact on the surrounding traffic environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline trench support construction, and in particular to a mobile trench support device and a prefabricated pipeline laying flowing water construction method. Background Art

[0002] Pipeline construction methods are divided into trenching construction and non-trenching construction. Trenching construction requires trench excavation first. In order to prevent trench foundation pit collapse, trench excavation needs to take slope excavation or support excavation measures according to geological conditions, excavation depth, surrounding environment, underground pipelines, groundwater and other conditions. When trenches are constructed using the slope excavation method, the upper width of the trench is large, and the amount of excavation and backfilling is large. Especially when the excavation site is limited or in order to reduce the scope of the existing road demolition, slope excavation is no longer applicable, and the trench needs to be excavated vertically. At this time, trench support is particularly important for safe construction.

[0003] Common support measures for non-slope excavation include wooden piles and steel sheet piles. The current practice is to use steel sheet piles as support structures, dig trenches, lay facilities, and backfill trenches in sections. The size of the site occupied by the construction area and the amount of support facilities are positively correlated with the length of the section. When reused, the steel sheet pile support structure needs to be dismantled, transported, and reinstalled, which has low efficiency and a greater impact on the surrounding traffic environment. In addition, the amount of support structure required is large, the cost of construction measures is high, and the construction period is long. Summary of the invention

[0004] The present invention aims to solve the deficiencies of the prior art and provides a mobile trench support device and a prefabricated pipeline laying flow construction method.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a mobile trench support device, including a support plate group, a steel ladder, a steel cross brace, a pin shaft, and a steel wire rope. The two support plate groups are symmetrically arranged, the support plate group is rectangular as a whole, and the front side and the bottom end of the support plate group are blade-shaped, and a triangular notch is arranged at the bottom of the front side. The steel ladder is arranged on the inner side of one support plate group, and a plurality of pairs of cross brace connectors are correspondingly arranged on the opposite surfaces of the two support plate groups. The cross brace connectors and the steel cross braces are plugged in and fixed by pin shafts. A wire rope clamp is arranged on the cross brace connector located at the top of the front side of the support plate group. The two ends of the wire rope are respectively bolted to the two cross brace connectors with the wire rope clamp, and are limited by the wire rope clamp. The middle part of the wire rope is connected to the traction equipment.

[0006] In particular, the support plate group includes a retaining steel plate, a first distribution beam, a second distribution beam, a first column, a second column, a third column, a triangular steel plate, a side blade angle steel plate, and a bottom blade angle steel plate.

[0007] In particular, the first distribution beam is welded to the top of the inner wall of the retaining steel plate, and a plurality of second distribution beams are welded to the inner wall of the retaining steel plate from top to bottom. The first distribution beam and the second distribution beam are arranged in parallel and are both rectangular cross-section steel pipes.

[0008] Particularly, the first column is welded to the rear edge of the inner wall of the retaining steel plate, and a plurality of second columns are welded to the inner wall of the retaining steel plate. The second columns and the first columns are arranged in parallel, are all rectangular cross-section steel pipes, and the bottom is cut into a wedge shape.

[0009] Particularly, a third column is welded to the inner wall of the retaining steel plate, and the third column is located between two adjacent second columns, and the steel ladder is welded to the third column.

[0010] Particularly, the first distribution beam, the second distribution beam are disconnected at the intersection with the second column and are welded to the first column and the second column, and the third column is disconnected at the intersection with the second distribution beam and is welded to the first distribution beam and the second distribution beam.

[0011] Particularly, the side angle steel plate is welded to the inner wall of the retaining steel plate away from the first column and is welded to the adjacent second column. A plurality of triangular steel plates are welded from top to bottom to the inner wall of the cavity formed by the second column, the retaining steel plate and the side angle steel plate.

[0012] In particular, the bottom blade angle steel plate is welded to the bottom of the inner wall of the retaining steel plate and is welded to the adjacent second distribution beam, and a plurality of triangular steel plates are welded in parallel on the inner wall of the cavity formed by the second distribution beam, the retaining steel plate and the bottom blade angle steel plate.

[0013] In particular, the cross brace connector is a steel pipe, which is vertically welded on the second columns on both sides of the retaining steel plate. The steel cross brace is a round steel pipe. A number of pin holes are correspondingly provided on the cross brace connector and the steel cross brace. The cross brace connector is inserted into the steel cross brace and fixed by passing the pin shaft through the pin hole.

[0014] A prefabricated pipeline laying water construction method, using a mobile trench support device for support, includes the following steps:

[0015] S1. Design the support device. Based on mechanical analysis, determine the size of each component of the support device and the thickness parameters of each steel plate;

[0016] S2. According to the design drawings, the support plate group, steel ladder, steel cross brace, pin shaft, steel wire rope, cross brace connector, and wire rope clamp are processed and manufactured in the factory, and transported to the construction site after processing;

[0017] S3. Assemble the support device at the location where the trench is to be excavated;

[0018] S4. Dig the soil inside and at both ends of the supporting device by mechanical and manual methods, so that the supporting device enters the soil and reaches the predetermined trench bottom elevation;

[0019] S5. Smooth the bottom of the trench, lay the pipe cushion, and install the pipe segments;

[0020] S6. Use an excavator to dig a trench in front;

[0021] S7, hang the wire rope installed on the supporting device on the excavator bucket, and use the excavator to pull the supporting device forward;

[0022] S8, loop S6-S7, as the support device moves forward, backfill the trench where the pipeline segment has been installed at the rear, until the support device moves forward to a suitable position, and the next pipeline segment can be installed;

[0023] S9, loop S5-S8 until all pipelines are laid;

[0024] S10. Use a crane to vertically lift the support device from the trench to the ground, backfill the remaining trench, dismantle the support device, and transport it to the next trench excavation construction site.

[0025] The beneficial effects of the present invention are:

[0026] 1. The support device of the present invention has a simple structure, clear force transmission, and is safe and reliable;

[0027] 2. The support device of the present invention can adjust the support width of the support device in a small range by adjusting the position of the connecting pin hole of the steel cross brace and the cross brace connecting piece on the support plate group to adapt to the construction of trench support with different widths;

[0028] 3. The support device of the present invention has low cost and can be used in different projects. Compared with the traditional trench support method, the construction cost is greatly reduced;

[0029] 4. The pipeline laying water construction method of the present invention reduces the area occupied by trench excavation and greatly reduces the impact on the surrounding traffic environment;

[0030] 5. The pipeline laying water flow construction method of the present invention has a fast construction speed and can reduce the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the support device of the present invention;

[0032] Figure 2 It is a top view of the supporting device structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the support plate group of the present invention;

[0034] Figure 4 It is a front view of the supporting plate assembly structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the construction method S3 of the present invention;

[0036] Figure 6 It is a schematic diagram of the construction method S4 of the present invention;

[0037] Figure 7 It is a schematic diagram of the construction method S5 of the present invention;

[0038] Figure 8 It is a schematic diagram of the construction method S6 of the present invention;

[0039] Fig. 9 It is a schematic diagram of the construction method S7 of the present invention;

[0040] Fig.10 It is a schematic diagram of the construction method S8 of the present invention;

[0041] Fig.11 This is a schematic diagram of the pipeline segment in the next stage of construction method S9 of the present invention;

[0042] In the figure: 1- support plate group; 101- retaining steel plate; 102- first distribution beam; 103- second distribution beam; 104- first column; 105- second column; 106- third column; 107- triangular steel plate; 108- side blade angle steel plate; 109- bottom blade angle steel plate; 2- steel ladder; 3- steel cross brace; 4- pin shaft; 5- steel wire rope; 6- cross brace connector; 7- steel wire rope clamp column;

[0043] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with embodiments:

[0045] like Figure 1-Figure 4 As shown, a mobile trench support device comprises a support plate group 1, a steel ladder 2, a steel cross brace 3, a pin 4, and a steel wire rope 5. The two support plate groups 1 are symmetrically arranged. The support plate group 1 is rectangular as a whole, and the front side and the bottom end of the support plate group 1 are blade-shaped, and a triangular notch is arranged at the bottom of the front side to avoid the "head-pinching" situation when the support device is towed forward; the steel ladder 2 is arranged on the inner side of a support plate group 1 for workers to use in going up and down the trench, and a plurality of pairs of cross brace connectors 6 are correspondingly arranged on the opposite surfaces of the two support plate groups 1. The cross brace connectors 6 and the steel cross brace 3 are plugged in and fixed by the pin 4. A wire rope clamping column 7 is arranged on the cross brace connector 6 located at the top of the front side of the support plate group 1, and the two ends of the wire rope 5 are respectively bolted to the two cross brace connectors 6 with the wire rope clamping column 7, and are limited by the wire rope clamping column 7. The middle part of the wire rope 5 is connected to the traction equipment.

[0046] The supporting plate group 1 includes a retaining steel plate 101 , a first distribution beam 102 , a second distribution beam 103 , a first column 104 , a second column 105 , a third column 106 , a triangular steel plate 107 , a side blade angle steel plate 108 , and a bottom blade angle steel plate 109 .

[0047] The first distribution beam 102 is welded to the top of the inner wall of the retaining steel plate 101, and a plurality of second distribution beams 103 are welded to the inner wall of the retaining steel plate 101 from top to bottom. The first distribution beam 102 and the second distribution beam 103 are arranged in parallel, and both are rectangular cross-section steel pipes; the first column 104 is welded to the rear edge of the inner wall of the retaining steel plate 101, and a plurality of second columns 105 are welded to the inner wall of the retaining steel plate 101. The second columns 105 and the first columns 104 are arranged in parallel, and both are rectangular cross-section steel pipes, and the bottom is cut. into a wedge shape; a third column 106 is welded to the inner wall of the retaining steel plate 101, and the third column 106 is located between two adjacent second columns 105, and the steel ladder 2 is welded to the third column 106; the first distribution beam 102, the second distribution beam 103 is disconnected at the intersection with the second column 105 and is welded to the first column 104 and the second column 105, and the third column 106 is disconnected at the intersection with the second distribution beam 103 and is welded to the first distribution beam 102 and the second distribution beam 103.

[0048] The second distribution beam 103 and the second column 105 are main load-bearing components. The cross-sectional size of the first distribution beam 102 may be smaller than that of the second distribution beam 103 , and the cross-sectional size of the first column 104 may be smaller than that of the second column 105 .

[0049] The side blade angle steel plate 108 is welded to the end of the inner wall of the retaining steel plate 101 away from the first column 104, and is welded to the adjacent second column 105. A number of triangular steel plates 107 are welded from top to bottom on the inner wall of the cavity formed by the second column 105, the retaining steel plate 101, and the side blade angle steel plate 108; the bottom blade angle steel plate 109 is welded to the bottom of the inner wall of the retaining steel plate 1010, and is welded to the adjacent second distribution beam 103. A number of triangular steel plates 107 are welded in parallel on the inner wall of the cavity formed by the second distribution beam 103, the retaining steel plate 101, and the bottom blade angle steel plate 109; the triangular steel plate 7 can play a role in strengthening the blade angle stiffness.

[0050] The cross brace connector 6 is a steel pipe, which is vertically welded on the second columns 105 on both sides of the retaining steel plate 101. The steel cross brace 3 is a round steel pipe. A number of pin holes are correspondingly provided on the cross brace connector 6 and the steel cross brace 3. The cross brace connector 6 is inserted into the steel cross brace 3 and fixed by the pin shaft 4 passing through the pin hole. The device of the present invention can adjust the support width of the support device in a small range by adjusting the position of the pin hole connecting the steel cross brace 3 and the cross brace connector 6 on the support plate group 1 to adapt to the trench support construction of different widths.

[0051] The support device can be moved as a whole and used in a cyclical manner, avoiding repeated disassembly and transportation, greatly improving construction efficiency and ensuring construction safety and quality; for prefabricated pipe laying construction above the groundwater level, it reduces the area of ​​the construction site, reduces the impact on the surrounding traffic environment, improves construction efficiency and reduces construction costs.

[0052] like Figure 5-Figure 11 As shown, a prefabricated pipe laying water flow construction method, using a mobile trench support device for support, includes the following steps:

[0053] S1. Design the support device. Based on mechanical analysis, determine the size of each component of the support device and the thickness parameters of each steel plate;

[0054] S2. According to the design drawings, the support plate group 1, steel ladder 2, steel cross brace 3, pin shaft 4, steel wire rope 5, cross brace connector 6, and wire rope clamp column 7 are processed and manufactured in the factory, and transported to the construction site after processing;

[0055] S3. Assemble the support device at the location where the trench is to be excavated;

[0056] S4. Dig the soil inside and at both ends of the supporting device by mechanical and manual methods, so that the supporting device enters the soil and reaches the predetermined trench bottom elevation;

[0057] S5. Smooth the bottom of the trench, lay the pipe cushion, and install the pipe segments;

[0058] S6. Use an excavator to dig a trench in front;

[0059] S7, hang the wire rope 5 installed on the supporting device on the excavator bucket, and use the excavator to pull the supporting device forward;

[0060] S8, loop S6-S7, as the support device moves forward, backfill the trench where the pipeline segment has been installed at the rear, until the support device moves forward to a suitable position, and the next pipeline segment can be installed;

[0061] S9, loop S5-S8 until all pipelines are laid;

[0062] S10. Use a crane to vertically lift the support device from the trench to the ground, backfill the remaining trench, dismantle the support device, and transport it to the next trench excavation construction site.

[0063] During construction, the trench is excavated at the front end, the pipes are installed in the middle, and the trench is backfilled at the rear. The support device is moved as the working surface is advanced, and continuous construction is carried out.

[0064] The support device of the present invention has a simple structure, clear force transmission, and is safe and reliable; the support device of the present invention can adjust the support width of the support device in a small range by adjusting the position of the connecting pin hole between the steel cross brace 3 and the cross brace connector 6 on the support plate group 1 to adapt to the construction of trench support with different widths; the support device of the present invention has a low cost and can be used in different projects, which greatly reduces the construction cost compared to the traditional trench support method; the pipeline laying flowing water construction method of the present invention reduces the area occupied by trench excavation and greatly reduces the impact on the surrounding traffic environment; the pipeline laying flowing water construction method of the present invention has a fast construction speed and can reduce the construction period.

[0065] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] The above is an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for laying prefabricated pipes in a flowing manner, using a mobile trench support device for support, characterized in that: The mobile trench support device comprises a support plate group (1), a steel ladder (2), a steel cross brace (3), a pin shaft (4), and a steel wire rope (5). The two support plate groups (1) are symmetrically arranged. The support plate groups (1) are rectangular in shape as a whole, and the front side and the bottom end of the support plate group (1) are blade-shaped, and a triangular notch is arranged at the bottom of the front side. The steel ladder (2) is arranged on the inner side of one support plate group (1). A plurality of pairs of cross brace connectors (6) are correspondingly arranged on the opposite surfaces of the two support plate groups (1). The cross brace connectors (6) and the steel cross brace (3) are plugged and fixed by the pin shaft (4). A steel wire rope clamping column (7) is arranged on the cross brace connector (6) located at the top of the front side of the support plate group (1). The two ends of the steel wire rope (5) are respectively bolted to the two cross brace connectors (6) with the steel wire rope clamping column (7) and are limited by the steel wire rope clamping column (7). The middle part of the steel wire rope (5) is connected to the traction device. The support plate group (1) comprises a retaining steel plate (101), a first distribution beam (102), a second distribution beam (103), a first column (104), a second column (105), a third column (106), a triangular steel plate (107), a side blade angle steel plate (108), and a bottom blade angle steel plate (109); the first column (104) is welded to the rear edge of the inner wall of the retaining steel plate (101), and a plurality of second columns (105) are welded to the inner wall of the retaining steel plate (101). ) inner wall, the second column (105) and the first column (104) are arranged in parallel, both are rectangular cross-section steel pipes, and the bottom is cut into a wedge shape; the cross brace connector (6) is a steel pipe, vertically welded to the second column (105) on both sides of the retaining steel plate (101), the steel cross brace (3) is a round steel pipe, and the cross brace connector (6) and the steel cross brace (3) are correspondingly provided with a plurality of pin holes, and the cross brace connector (6) is inserted into the steel cross brace (3) and fixed through the pin shaft (4) passing through the pin hole; The construction method includes the following steps: S1. Design the support device. Based on mechanical analysis, determine the size of each component of the support device and the thickness parameters of each steel plate; S2. According to the design drawings, the support plate assembly (1), steel ladder (2), steel cross brace (3), pin shaft (4), steel wire rope (5), cross brace connector (6), and steel wire rope clamp (7) are processed and manufactured in the factory, and transported to the construction site after the processing is completed; S3. Assemble the support device at the location where the trench is to be excavated; S4. Dig the soil inside and at both ends of the supporting device by mechanical and manual methods, so that the supporting device enters the soil and reaches the predetermined trench bottom elevation; S5. Smooth the bottom of the trench, lay the pipe cushion, and install the pipe segments; S6. Use an excavator to dig a trench in front; S7, hanging the steel wire rope (5) installed on the supporting device on the excavator bucket, and using the excavator to pull the supporting device forward; S8, loop S6-S7, as the support device moves forward, backfill the trench where the pipeline segment has been installed at the rear, until the support device moves forward to a suitable position, and the next pipeline segment can be installed; S9, loop S5-S8 until all pipelines are laid; S10. Use a crane to vertically lift the support device from the trench to the ground, backfill the remaining trench, dismantle the support device, and transport it to the next trench excavation construction site.

2. A prefabricated pipeline laying flow construction method according to claim 1, characterized in that: The first distribution beam (102) is welded to the top of the inner wall of the retaining steel plate (101), and a plurality of second distribution beams (103) are welded to the inner wall of the retaining steel plate (101) from top to bottom. The first distribution beam (102) and the second distribution beam (103) are arranged in parallel and are both rectangular cross-section steel pipes.

3. A prefabricated pipeline laying flow construction method according to claim 2, characterized in that: A third column (106) is welded to the inner wall of the retaining steel plate (101), and the third column (106) is located between two adjacent second columns (105), and the steel ladder (2) is welded to the third column (106).

4. A prefabricated pipeline laying flow construction method according to claim 3, characterized in that: The first distribution beam (102), the second distribution beam (103) are disconnected at the intersection with the second column (105) and are welded to the first column (104) and the second column (105); the third column (106) is disconnected at the intersection with the second distribution beam (103) and is welded to the first distribution beam (102) and the second distribution beam (103).

5. A prefabricated pipeline laying flow construction method according to claim 4, characterized in that: The side angle steel plate (108) is welded to an end of the inner wall of the retaining steel plate (101) away from the first column (104) and is welded to the adjacent second column (105). A plurality of triangular steel plates (107) are welded from top to bottom to the inner wall of the cavity formed by the second column (105), the retaining steel plate (101) and the side angle steel plate (108).

6. A prefabricated pipeline laying flow construction method according to claim 5, characterized in that: The bottom blade angle steel plate (109) is welded to the bottom of the inner wall of the retaining steel plate (101) and is welded to the adjacent second distribution beam (103). A plurality of triangular steel plates (107) are welded in parallel on the inner wall of the cavity formed by the second distribution beam (103), the retaining steel plate (101) and the bottom blade angle steel plate (109).

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