Pipeline trench anti-slope excavation supporting device and construction method thereof

Abstract

The application discloses a pipeline trench reverse slope excavation supporting device, which comprises a hydraulic system, a movable and sliding support assembly, an adjustable supporting assembly, a nested inclined column, a stand, and a side wall baffle. The nested inclined column comprises an upper inclined column, a relay inclined column, and a bottom inclined column which are gradually nested and relatively slide. The hydraulic system comprises a large-tonnage hydraulic oil cylinder and a large-stroke hydraulic oil cylinder. The telescopic structure of the upper inclined column, the relay inclined column, and the bottom inclined column facilitates supporting in different supporting structure depth ranges, avoids the height and width limitations of equipment transportation, reduces the adjustment time required by operators, improves work efficiency, facilitates reverse slope supporting and excavation, means that the construction earth excavation, backfilling amount, road recovery workload, and operation land area are significantly reduced, and effectively solves many problems such as large trench excavation land area, large road occupation pressure, long supporting time, and unguaranteed backfilling soil quality.

Description

Technical Field

[0001] This invention relates to, specifically, a reverse slope excavation support device for pipeline trenches and its construction method. Background Technology

[0002] With the continuous utilization of underground space in my country, the scale and density of municipal infrastructure construction such as pipelines, utility tunnels, and canals are constantly increasing. More and more trench excavation construction in cities has an irreconcilable relationship with surrounding buildings, roads and lifelines, narrow alleys, existing complex underground pipelines, social activities and other environmental factors: on the one hand, "road zipper" construction can easily cause safety hazards, damage to road landscape, affect the appearance of the city and greatly affect the urban traffic environment, causing great inconvenience to people's lives and social activities; on the other hand, insufficient trench excavation construction surface makes it difficult for workers and equipment to work normally, and construction safety, quality, construction period and cost cannot be guaranteed.

[0003] Open-cut pipe laying technology is a traditional underground pipeline construction technique, with a systematic and mature construction process. For open-cut pipe laying with a burial depth greater than 2m, the main support methods are horizontal bracing soil wall support, steel sheet piles, or channel steel. Although trench box support has been adopted as a mandatory safety measure in trench excavation abroad, its application is limited to using trench boxes for fixed-position support in the trench, which cannot allow for internal movement within the trench and is difficult to meet the requirements of excavation and support under different conditions. Developing and applying a convenient, safe, and highly applicable new support method has become the development direction for improving construction efficiency, overcoming the limitations of complex external environments, and avoiding and controlling safety risks in trench excavation projects. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a reverse slope excavation support device for pipeline trenches, which solves the problems of unsightly construction, long construction period, and poor applicability of existing fixed support equipment due to the large construction surface of trench excavation in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a pipeline trench reverse slope excavation support device, including a hydraulic system, a movable and sliding support assembly, an adjustable support assembly, nested inclined columns, columns, and side wall baffles.

[0006] The nested inclined columns are symmetrically arranged, including upper inclined columns, intermediate inclined columns, and bottom inclined columns that are nested in stages and slide relative to each other;

[0007] The hydraulic system includes a large-tonnage hydraulic cylinder disposed between the bottom inclined column and the intermediate inclined column, and a long-stroke hydraulic cylinder disposed between the outer side of the intermediate inclined column and the upper inclined column.

[0008] The uprights are fixedly connected to the upper inclined column and the support assembly, respectively, and the side wall baffles are fixedly installed between two adjacent nested inclined columns.

[0009] Furthermore, the bottom of the bottom inclined column is provided with a cutting edge.

[0010] Furthermore, the side wall baffle includes baffles installed on the uprights, relay inclined columns and upper inclined columns and a bottom baffle installed on the bottom inclined column. There are a plurality of baffles, the number of which increases sequentially as the relay inclined columns and upper inclined columns are deployed. The baffles are fixedly connected to the uprights, relay inclined columns and upper inclined columns respectively, and the bottom baffle is fixedly connected to the bottom inclined column.

[0011] Furthermore, the bottom of the bottom baffle is provided with a cutting edge.

[0012] Furthermore, the large-tonnage hydraulic cylinder is hinged and fixed to the bottom inclined column and the intermediate inclined column respectively, and the long-stroke hydraulic cylinder is hinged and fixed to the intermediate inclined column and the upper inclined column respectively.

[0013] Furthermore, the relay inclined column is provided with a number of limiting holes at equal intervals, and limiting pins are provided in the limiting holes.

[0014] Furthermore, the support components are correspondingly arranged between the nested inclined columns, and at least one set is provided.

[0015] This application also provides a construction method for reverse slope excavation of pipeline trenches, comprising the following steps:

[0016] Step S01: First, excavate the foundation pit trench vertically without support to a depth of less than 1 meter;

[0017] Step S02: Use a crane to lift the support structure from the pit top floor to the preliminarily excavated trench;

[0018] Step S03: Rotate the adjustable support assembly to extend the support structure until the nested inclined columns, uprights and sidewall baffles are tightly against the trench sidewall;

[0019] Step S04: Activate the large-tonnage hydraulic cylinder to drive the bottom inclined column with cutting edge and the bottom baffle with cutting edge to push forward and cut the soil;

[0020] Step S05: When the bottom inclined column extends to the preset length, the jacking and cutting ends. The trench soil that has been effectively supported is then excavated, and baffles are installed as appropriate.

[0021] Step S06: Activate the large-stroke hydraulic cylinder to drive the intermediate inclined column to push and nest the bottom inclined column, and install the baffle in time until the intermediate inclined column extends and nests to the preset length;

[0022] Step S07: Then install the limiting shaft pin onto the relay inclined column and fix the second set of adjustable support components;

[0023] Step S08: Use the large-tonnage hydraulic cylinder for the second time to drive the bottom inclined column with cutting foot and the bottom baffle with cutting foot to push forward and cut the soil until the bottom inclined column extends to the preset length, and install the baffle in time.

[0024] Step S09: At this point, excavate to the bottom of the trench and install pipelines until the construction is completed.

[0025] Furthermore, in step S09, the cutting edge of the bottom inclined column should be inserted below the preset groove bottom elevation for embedding protection to prevent groove kicking.

[0026] The main technical effects of this invention are as follows: The nested, expandable structure of the upper, intermediate, and bottom inclined columns facilitates support within different depth ranges without requiring replacement of columns of varying lengths. This avoids height and width restrictions on equipment transportation, reduces operator adjustment time, and improves work efficiency. Furthermore, the unfolded nested inclined columns facilitate reverse slope support and excavation, significantly reducing earthwork excavation, backfilling, road restoration work, and land occupation. This effectively solves numerous problems such as large trench excavation area, significant road occupancy, long support time, and inconsistent backfill quality. The impact of construction on surrounding buildings, complex pipelines, and social activities is also significantly reduced, resulting in a more aesthetically pleasing appearance. Attached Figure Description

[0027] Figure 1 This is a diagram showing the usage state of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the nested inclined column before it is unfolded.

[0029] Figure 3 This is a schematic diagram of the fully unfolded structure of the nested inclined columns;

[0030] Figure 4 This is a side view of the relay inclined column;

[0031] Figure 5 This is a side view of the side wall baffle.

[0032] Figure 6 This is a construction flowchart for a construction method used for reverse slope excavation of pipeline trenches.

[0033] The attached figures are labeled as follows: 1-Hydraulic system, 11-Large tonnage hydraulic cylinder, 12-Large stroke hydraulic cylinder, 2-Support assembly, 3-Support assembly, 4-Nested inclined column, 41-Upper inclined column, 42-Intermediate inclined column, 421-Limiting hole, 422-Limiting pin, 43-Bottom inclined column, 5-Column, 6-Side wall baffle, 61-Baffle, 62-Bottom baffle. Detailed Implementation

[0034] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0035] In this embodiment, it should be understood that the terms "middle," "upper," "lower," "top," "right side," "left end," "above," "back," "center," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0036] Furthermore, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art. Therefore, it will not be described in detail in this embodiment.

[0037] This invention provides a reverse slope excavation support device for pipeline trenches, such as... Figure 1-5 As shown, it includes a hydraulic system 1, a movable and sliding support assembly 2, an adjustable support assembly 3, a nested inclined column 4, a column 5, and a side wall baffle 6.

[0038] The nested inclined columns 4 are symmetrically arranged, including upper inclined columns 41, intermediate inclined columns 42, and bottom inclined columns 43 that are nested in stages and slide relative to each other. In this embodiment, the support angle between the upper inclined columns 41 is 20°-90°. The support angle of the upper inclined columns 41 is adjusted according to the construction depth and requirements on site. After the nested inclined columns are unfolded, it is convenient for reverse slope support and excavation, which means that the amount of earthwork excavation, backfilling, road restoration work and construction area are significantly reduced. It effectively solves many problems such as large trench excavation area, large road occupation pressure, long support time and inability to guarantee the quality of backfill soil. The impact of construction operations on surrounding buildings, complex pipelines, social activities, etc. is effectively reduced, and it is also more aesthetically pleasing.

[0039] In this embodiment, the shapes of the upper inclined column 41, the intermediate inclined column 42, and the bottom inclined column 43 are mutually adapted. The bottom inclined column 43 is sleeved inside the intermediate inclined column 42, and the intermediate inclined column 42 is sleeved inside the upper inclined column 41. This facilitates relative sliding of the upper inclined column 41 and the intermediate inclined column 42 under the push of the large-stroke hydraulic cylinder 12, and also facilitates relative sliding of the bottom inclined column 43 and the intermediate inclined column 42 under the push of the large-tonnage hydraulic cylinder 11. Through the nested telescopic structure of the upper inclined column 41, the intermediate inclined column 42, and the bottom inclined column 43, it is convenient to provide support within different support structure depth ranges without the need to replace columns of different lengths. This also avoids the problems of height and width restrictions in equipment transportation, reduces the adjustment time required by the operator, and improves work efficiency.

[0040] The hydraulic system 1 includes a large-tonnage hydraulic cylinder 11 disposed between the bottom inclined column 43 and the intermediate inclined column 42, and a long-stroke hydraulic cylinder 12 disposed between the intermediate inclined column 42 and the outer side of the upper inclined column 41. The soil cutting driven by the hydraulic system has the advantages of simple structure and high operation efficiency. Correspondingly, the hydraulic system 1 of this application can be replaced by an electric propulsion system.

[0041] The column 5 is fixedly connected to the upper inclined column 41 and the support assembly 2 respectively, and the side wall baffle 6 is fixedly installed between two adjacent nested inclined columns 4.

[0042] In this embodiment, the bottom of the bottom inclined column 43 is provided with a cutting edge, which makes it easier for the bottom inclined column 43 to cut the soil when powered.

[0043] The side wall baffle 6 includes baffles 61 installed on the upright column 5, the relay inclined column 42 and the upper inclined column 41 and a bottom baffle 62 installed on the bottom inclined column 43. There are a plurality of baffles 61, and the number increases sequentially as the relay inclined column 42 and the upper inclined column 41 are deployed. The baffles 61 are fixedly connected to the upright column 5, the relay inclined column 42 and the upper inclined column 41 respectively, and the bottom baffle 62 is fixedly connected to the bottom inclined column 43.

[0044] In this embodiment, the bottom of the bottom baffle 62 is provided with a cutting edge, which makes it easier for the bottom baffle 62 to cut the soil.

[0045] In this embodiment, the large-tonnage hydraulic cylinder 11 is hinged and fixed to the bottom inclined column 43 and the intermediate inclined column 42 respectively, and the long-stroke hydraulic cylinder 12 is hinged and fixed to the intermediate inclined column 42 and the upper inclined column 41 respectively.

[0046] In this embodiment, the relay inclined column 42 is provided with a plurality of limiting holes 421 at equal intervals. Limiting pins 422 are provided in the limiting holes 421. After the large-stroke hydraulic cylinder 12 pushes the relay inclined column 42 to extend, the limiting holes 421 are exposed from the cover of the upper inclined plate in sequence. After the relay inclined column 42 extends to a predetermined length, the limiting pins 422 are inserted into the limiting holes 421 closest to the upper inclined plate. The limiting pins 422 bear the supporting force, thereby preventing the relay inclined column 42 from automatically retracting into the upper inclined column 41 after the large-stroke hydraulic cylinder 12 is unloaded.

[0047] The support components 3 are correspondingly arranged between the nested inclined columns 4, and at least one set is provided, so as to facilitate the horizontal support of the nested inclined columns 4 by using the support components 3, and avoid the nested inclined columns 4 from bending and deforming due to excessive force during the support process.

[0048] In this embodiment, the support component 2 and the support component 3 are the corresponding technical contents of the existing patent "Groove Post-Support System" (ZL201921408208), which will not be described in detail here.

[0049] like Figure 6 As shown, a construction method for reverse slope excavation of pipeline trenches includes the following steps:

[0050] Step S01: First, excavate the foundation pit trench vertically without support to a depth of less than 1 meter; among which,

[0051] Step S02: Use a crane to lift the support structure from the pit top floor to the preliminarily excavated trench;

[0052] Step S03: Rotate the adjustable support assembly 3 to extend the support structure until the nested inclined column 4, column 5 and side wall baffle 6 are tightly against the trench sidewall, thereby using the side wall baffle 6 to support the top sidewall of the trench first.

[0053] Step S04: Activate the large-tonnage hydraulic cylinder 11 to drive the bottom inclined column 43 with cutting edge and the bottom baffle 62 with cutting edge to push forward and cut the soil.

[0054] Step S05: When the bottom inclined column 43 extends to the preset length and the jacking and cutting ends, the trench soil that has been effectively supported is excavated, and the baffle 61 is installed in time. The baffle 61 and the side wall baffle 6 form a preliminary support layer to avoid collapse during the reverse slope excavation.

[0055] Step S06: Activate the large stroke hydraulic cylinder 12 to drive the intermediate inclined column 42 to push the bottom inclined column 43 into the nest, and install the baffle 61 in time until the intermediate inclined column 42 extends and nests to the preset length. By extending the intermediate inclined column 42, the bottom inclined column 43 is retracted into the intermediate inclined column 42 while remaining stationary, providing support and guidance for the bottom inclined column 43 to extend again.

[0056] Step S07: Then install the limit pin 422 onto the relay inclined column 42 and fix the second set of adjustable support components 3. The main purpose of installing the limit pin 422 is to prevent the large stroke hydraulic cylinder 12 from bearing too much jacking force during the subsequent soil cutting.

[0057] Step S08: The large-tonnage hydraulic cylinder 11 is activated for the second time to drive the bottom inclined column 43 with cutting foot and the bottom baffle 62 with cutting foot to push forward and cut the soil again until the bottom inclined column 43 extends to the preset length, and the baffle 61 is installed in time.

[0058] Step S09: At this point, excavate to the bottom of the trench and install pipelines until the construction is completed.

[0059] In step S09, the cutting edge of the bottom inclined column 43 should be inserted below the preset groove bottom elevation for embedding protection to prevent groove kicking.

[0060] The main technical effects of this invention are as follows: The nested, expandable structure of the upper, intermediate, and bottom inclined columns facilitates support within different depth ranges without requiring replacement of columns of varying lengths. This avoids height and width restrictions on equipment transportation, reduces operator adjustment time, and improves work efficiency. Furthermore, the unfolded nested inclined columns facilitate reverse slope support and excavation, significantly reducing earthwork excavation, backfilling, road restoration work, and land occupation. This effectively solves numerous problems such as large trench excavation area, significant road occupancy, long support time, and inconsistent backfill quality. The impact of construction on surrounding buildings, complex pipelines, and social activities is also significantly reduced, resulting in a more aesthetically pleasing appearance.

[0061] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A pipeline trench counter-slope excavation construction method, a pipeline trench counter-slope excavation support device is applied, characterized in that, The hydraulic system, movable and sliding support assembly, adjustable support assembly, nested inclined column, upright column, side wall baffle; The nested inclined column is symmetrically arranged and includes upper inclined column, relay inclined column and bottom inclined column which are nested and relatively slide; The hydraulic system includes large-tonnage hydraulic cylinder arranged between the inside of the bottom inclined column and the relay inclined column and large-stroke hydraulic cylinder arranged between the outside of the relay inclined column and the upper inclined column; The upright column is fixedly connected with the upper inclined column and the support assembly respectively, and the side wall baffle is fixedly installed between the adjacent two nested inclined columns correspondingly; The construction method using the device is also included, which includes the following steps, Step S01: first, vertical excavation of the foundation pit trench without support is performed to a depth of 1 meter or less; Step S02: the support structure is hoisted from the pit top floor to the trench preliminarily excavated by a crane; Step S03: the adjustable support assembly is rotated to stretch the support structure until the nested inclined column, upright column and side wall baffle tightly top the trench side wall; Step S04: the large-tonnage hydraulic cylinder is started to drive the blade footed bottom inclined column and the blade footed bottom baffle to cut into the soil; Step S05: the bottom inclined column is stretched to a preset length to end the cutting into the soil, the trench soil is excavated and the baffle is timely installed; Step S06: the large-stroke hydraulic cylinder is started to drive the relay inclined column to nest the bottom inclined column, the baffle is timely installed until the relay inclined column is stretched to a preset length; Step S07: then, the limiting pin is installed on the relay inclined column and the second adjustable support assembly is fixedly installed; Step S08: the large-tonnage hydraulic cylinder is started again to drive the blade footed bottom inclined column and the blade footed bottom baffle to cut into the soil until the bottom inclined column is stretched to a preset length and the baffle is timely installed; Step S09: at this time, the trench bottom is gradually excavated and pipeline operation is performed until the construction operation is completed.

2. A method for inverse slope trench excavation of a pipeline according to claim 1, wherein The bottom of the bottom inclined column is provided with a blade foot.

3. A method for inverse slope trench excavation of a pipeline according to claim 1, wherein, The side wall baffle includes baffles arranged on the upright column, relay inclined column and upper inclined column and bottom baffle arranged on the bottom inclined column, the baffles are provided with a plurality of baffles, the number of which is sequentially increased with the expansion of the relay inclined column and upper inclined column, the baffles are fixedly connected with the upright column, relay inclined column and upper inclined column respectively, and the bottom baffle is fixedly connected with the bottom inclined column.

4. A method for inverse slope trench excavation of a pipeline according to claim 3, wherein The bottom of the bottom baffle is provided with a blade foot.

5. A method for inverse slope trenching of a pipeline according to claim 1, wherein, The large-tonnage hydraulic cylinder is hingedly fixed with the bottom inclined column and relay inclined column respectively, and the large-stroke hydraulic cylinder is hingedly fixed with the relay inclined column and upper inclined column respectively.

6. A method for inverse slope trenching of a pipeline according to claim 1, wherein, A plurality of limiting holes are equally arranged on the relay inclined column, and a limiting pin is arranged in the limiting hole.

7. A method for inverse slope trenching of a pipeline according to claim 1, wherein, The support assembly is correspondingly arranged between the nested inclined columns and is provided with at least one group or more.

8. A method for inverse slope trenching of a pipeline according to claim 1, wherein, In step S09, the blade foot of the bottom inclined column should be inserted below the preset trench bottom elevation to serve as an embedded protection to prevent the trench from kicking.

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