A method of laying a wicking geotextile

Abstract

This invention relates to a method for laying wicking geotextile, comprising the following steps: During the construction of a new roadbed, the wicking geotextile is laid within the roadbed. The wicking geotextile is equipped with a protective device, which includes a protective tube. The protective tube is connected to a rotating shaft via a rotating assembly, allowing the shaft to rotate around its own axis. The wicking geotextile extends into the protective tube and is wound around the rotating shaft, with its movable end extending out of the protective tube. The rotation of the shaft enables the wicking geotextile to be wound and released. The portion of the wicking geotextile used for laying on the slope is wound inside the protective tube by the rotating shaft during the construction of the new roadbed. After the slope treatment of the new roadbed is completed, the wicking geotextile is released by rotating the shaft, allowing it to unfold and lay flat on the slope. The wicking geotextile is then secured on the slope. This laying method of the invention avoids damage to the wicking geotextile during slope treatment construction, ensuring its functionality.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and specifically to a method for laying wicking geotextiles. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] As the main engineering component of a highway, the roadbed must possess sufficient load-bearing capacity, durability, and stability. A robust roadbed is crucial for the performance of the highway pavement, ensuring traffic safety, and extending the highway's service life. However, in areas with high groundwater levels and abundant rainfall, the moisture content of the roadbed soil undergoes long-term periodic dynamic changes, leading to a significant decline in the roadbed's structural modulus and service performance. In recent years, the method of controlling the internal humidity of the roadbed by embedding geotextiles has been widely used in some newly constructed roadbeds. However, the cumbersome roadbed filling process, the prevalence of slope brushing due to overpressure during roadbed construction, and the widespread damage to the geotextiles caused by slope infrastructure repairs have significantly reduced the effectiveness of controlling the internal humidity of the roadbed. This has resulted in a significant suppression of the drainage mechanism through moisture exchange with the atmosphere via the slope extension, making it difficult to achieve the expected results.

[0004] Currently, there are no specific standards or construction specifications for the installation of subgrade internal facilities such as geotextiles, traditional geomembranes, and geogrids. Often, these are installed in the early stages of construction, but lack of protection during the construction period leads to damage later on, resulting in drainage performance far below expectations and significant resource waste. Therefore, it is crucial to ensure the proper installation and protection of geotextiles, especially the protruding sections on slopes, during construction to effectively fulfill their intended drainage function. Currently, there are no relevant specifications or procedures for the installation and protection of geotextiles. Traditional methods combining manual labor and machinery are often used in a rough and inefficient manner, which easily leads to localized failure or structural damage to the geotextiles. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for laying wicking geotextiles, which can effectively avoid the potential damage risks of wicking geotextiles during construction, thereby effectively improving the integrity of the wicking geotextiles and drainage efficiency, and maximizing their effect on controlling roadbed moisture.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] An embodiment of the present invention provides a method for laying wicking geotextile, comprising the following steps:

[0008] During the construction of a new roadbed, geotextile is laid inside the roadbed. The geotextile is equipped with a protective device, which includes a protective tube. The protective tube is connected to a rotating shaft through a rotating component, so that the rotating shaft can rotate around its own axis. The geotextile extends into the protective tube and is wound around the rotating shaft. Its movable end extends out of the protective tube. The rotation of the rotating shaft can drive the geotextile to be rolled up and released. The part of the geotextile used to be laid on the slope is rolled up inside the protective tube through the rotating shaft during the construction of the new roadbed.

[0009] After the slope treatment of the new roadbed is completed, the core geotextile is released by rotating the shaft, so that the core geotextile is spread out and laid flat on the slope, and then the core geotextile is fixed on the slope.

[0010] Optionally, the rotating assembly includes a connecting rod, one end of which is detachably connected to the end of the rotating shaft, and the other end is rotatably connected to a support wheel, which cooperates with an annular guide rail.

[0011] Optionally, the support wheel is a gear, and correspondingly, the inner side of the annular guide rail is provided with a gear ring that meshes with the gear.

[0012] Optionally, after the core-absorbing geotextile is laid flat on the slope, the pivot, support wheel, and connecting rod are removed from the protective pipe.

[0013] Optionally, the protective tube is provided with an insertion slit for the wicking geotextile to extend into the protective tube and an extension slit for the wicking geotextile to extend out of the protective tube, the width of the insertion slit and the extension slit being greater than the width of the wicking geotextile.

[0014] Optionally, the insertion slot and the extension slot are set at obtuse angles along the circumferential interval on the protective tube wall.

[0015] Optionally, the bottom of the inner cylinder of the protective tube is provided with a drainage groove. After the core absorbent geotextile is laid flat on the slope, the set part of the core absorbent geotextile located inside the protective tube is folded and pressed into the drainage groove.

[0016] Optionally, the drainage ditch is lined with silt and in contact with the core-absorbing geotextile pressed into the drainage ditch.

[0017] Optionally, one end of the drainage ditch is provided with an insert block, and the other end is provided with a slot that matches the insert block. When the core-absorbing geotextile is laid, the drainage ditches of adjacent protective pipes are connected by inserting to form a drainage channel along the longitudinal direction of the newly built roadbed.

[0018] Optionally, after the core-absorbing geotextile is fixed on the slope surface, it can be covered with filler material for protection.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The wicking geotextile laying method of the present invention involves the wicking geotextile being rolled into a protective tube before slope treatment construction. After the slope treatment is completed, it is released through a rotating shaft and then spread out and laid flat on the slope. During slope treatment, such as slope brushing, the portion of the wicking geotextile used for laying on the slope will not be damaged, thus ensuring the water-proofing and drainage effect of the wicking geotextile and fully utilizing its drainage function.

[0021] 2. The wicking geotextile laying method of the present invention involves unfolding and flattening the wicking geotextile on the slope, then folding and pressing the designated portion inside the protective pipe into the drainage trough. The drainage trough fixes the wicking geotextile and prevents backflow, effectively controlling the potential backflow phenomenon caused by rainfall infiltration and achieving continuous control of the internal humidity of the roadbed.

[0022] 3. The method for laying the wicking geotextile of the present invention involves a detachable connection between the annular guide rail and the protective pipe, and a detachable connection between the connecting rod and the rotating shaft. After the wicking geotextile is laid on the slope, the annular guide rail, connecting rod, rotating shaft, etc., can be removed and reused, avoiding waste and saving construction costs. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0024] Figure 1 This is a flowchart of the deployment method in Embodiment 1 of the present invention;

[0025] Figure 2 This is a side view of the protective device according to Embodiment 1 of the present invention;

[0026] Figure 3 This is a side view of the protective tube in Embodiment 1 of the present invention;

[0027] Figure 4 This is a top view of the protective device according to Embodiment 1 of the present invention;

[0028] Figure 5 This is a schematic diagram showing the completion of the new roadbed construction in step 1 of embodiment 1 of the present invention;

[0029] Figure 6 This is a side view of the 3-core geotextile in step 1 of the present invention after it has been unfolded on the slope.

[0030] Figure 7 This is a top view of the 3-core absorbent geotextile after it has been unfolded on the slope in step 1 of this embodiment of the invention;

[0031] Among them, 1. Overfill section, 2. Protective device, 3. Roadbed construction slope brushing line, 4. Roadbed interior section, 5. New roadbed, 6. Drainage system, 7. Slope section;

[0032] 2-1. Extending seam, 2-2. Inserting seam, 2-3. Drainage groove, 2-4. Circular guide rail, 2-5. Rotating shaft, 2-6. Connecting rod, 2-7. Gear;

[0033] 6-1. Drainage channel connection section. Detailed Implementation

[0034] Example 1

[0035] This embodiment provides a method for laying a core-absorbing geotextile, wherein the core-absorbing geotextile is provided with a protective device 2. The protective device 2 is used to roll up the portion of the core-absorbing geotextile to be laid on the slope inside its interior, protecting the core-absorbing geotextile during slope treatment construction such as slope brushing. After the slope treatment construction is completed, the core-absorbing geotextile is released through the protective device and unfolded and laid flat on the slope.

[0036] like Figures 2-4 As shown, the protective device 2 includes a protective tube made of PVC pipe with a length of 5m-8m. Rotating components are provided at both ends of the inner cylinder of the protective tube. The rotating components are connected to the rotating shaft 2-5. The rotating shaft 2-5 is coaxial with the protective tube and can rotate around its own axis through the rotating components.

[0037] The protective pipe has an inlet slit 2-2 and an outlet slit 2-1 on its cylindrical wall. The inlet slit 2-2 is used for the geotextile core to extend into the protective pipe, and the outlet slit 2-1 is used for the geotextile core to extend out of the protective pipe.

[0038] The lengths of both the insertion seam 2-2 and the extension seam 2-1 are greater than the width of the geotextile, so as to facilitate the insertion and extension of the geotextile into and out of the protective tube.

[0039] In this embodiment, the insertion slot 2-2 and the extension slot 2-1 are set at obtuse angles along the circumferential direction of the protective tube.

[0040] The wicking geotextile extends into the protective tube through the insertion seam 2-2, and after being wrapped around the rotating shaft 2-5, its movable end extends out through the extension seam 2-1. The portion of the wicking geotextile wrapped around the rotating shaft 2-5 is used to lay on the slope of the newly built roadbed.

[0041] The wrapping method of the wicking geotextile on the rotating shaft 2-5 is as follows:

[0042] The rotating shaft 2-5 contacts the middle part of the wicking geotextile used for laying on the slope. The wicking geotextile is folded around the rotating shaft along the part in contact with the rotating shaft to form two parts. After the two parts are wound around the rotating shaft together, one end of the wicking geotextile extends through the extension seam 2-1 and the other end extends through the insertion seam 2-2. In this way, rotating the rotating shaft 2-5 can realize the winding and unwinding of the wicking geotextile.

[0043] When constructing a new roadbed, the movable end of the geotextile is placed at the protruding seam during the laying of the geotextile inside the roadbed. This allows the portion of the geotextile to be laid on the slope to be rolled up inside the protective pipe for protection.

[0044] The rotating assembly includes at least two connecting rods 2-6. One end of the connecting rod 2-6 is provided with a fixing plate, which matches the rotating shaft 2-5. Both the fixing plate and the rotating shaft 2-5 are provided with fixing holes. The fixing plate and the rotating shaft 2-5 can be detachably and fixedly connected through the fixing holes and fixing bolts. The other end of the connecting rod 2-6 is rotatably connected with a support wheel, which is embedded in an annular guide rail 2-4. The annular guide rail 2-4 is fixed to the end of the inner cylinder surface of the protective tube.

[0045] Preferably, the support wheel is a gear 2-7, and correspondingly, the inner side of the annular guide rail 2-4 is provided with a gear ring that meshes with the gear 2-7.

[0046] The connecting rod 2-6 and the gear 2-7 support the rotating shaft 2-5, enabling the rotating shaft 2-5 to be coaxially mounted with the protective tube and to rotate around its own axis.

[0047] The connecting rod 2-6 and the rotating shaft 2-5 are detachably and fixedly connected, making it convenient to remove the connecting rod 2-6, gear 2-7 and rotating shaft 2-5 for reuse.

[0048] The bottom of the inner cylinder of the protective pipe is provided with a drainage groove 2-3. The drainage groove 2-3 is a U-shaped groove. The drainage groove 2-3 extends to the outside of the protective pipe after passing through the annular guide rails 2-4 at both ends. One end of the drainage groove 2-3 is provided with a plug, and the other end is provided with a slot that matches the plug. The plug can be inserted into the slot, so that the drainage grooves 2-3 of two adjacent protective devices 2 can be spliced ​​together to form a drainage system 6 along the longitudinal direction of the newly built roadbed. The two ends of the entire drainage system 6 extend to the outside of the soil of the roadbed.

[0049] like Figure 1 As shown, the method for laying the wicking geotextile in this embodiment includes the following steps:

[0050] Step 1: As Figure 5 As shown, the construction of the new roadbed 5 is carried out. During the construction of the new roadbed 5, the inner part 4 of the roadbed with the pre-installed protective device 2 is laid, and the slope part 7 of the protective device 2 is rolled up inside the protective device 2.

[0051] Specifically: the slope portion 7 of the wicking geotextile is pre-wound inside the protective tube via the pivot 2-5, and the movable end of the wicking geotextile is draped over the protruding seam 2-1.

[0052] After the newly constructed roadbed 5 is laid to the corresponding design height, a core-absorbing geotextile is laid on the laid portion of the newly constructed roadbed 5. The protective pipe is spaced at a set distance from the slope of the laid newly constructed roadbed 5 to allow for the overfill portion 3 of the newly constructed roadbed 5.

[0053] The drainage channels 2-3 of adjacent protective pipes are connected by inserts and slots to form drainage channel connection section 6-1.

[0054] The geotextile fabric laid at this time is the part laid inside the roadbed, while the part laid on the slope is rolled up inside the protective pipe.

[0055] After the geotextile is laid, continue laying the new roadbed until the new roadbed reaches the target height.

[0056] Step 2: Slope treatment construction.

[0057] In this embodiment, the slope is brushed along the roadbed construction slope brushing line 3, and the overfilled part 1 of the newly built roadbed slope is removed. The existing construction method can be used for the slope brushing construction, which will not be described in detail here.

[0058] Step 3: As Figures 6-7 As shown, after the slope brushing treatment is completed, for each protective device 2 and core absorbent geotextile, pull the core absorbent geotextile to be placed on the movable end of the protruding seam, so that the rotating shaft 2-5 rotates, releases the core absorbent geotextile, and unfolds the slope part 7 of the core absorbent geotextile and lays it flat on the slope.

[0059] Step 4: Remove the connecting rod 2-6, rotating shaft 2-5 and gear 2-7 from the end of each protective pipe in sequence. Then, the construction worker inserts a pressure rod into the inside of the protective pipe and presses down the core-absorbing geotextile inside the protective pipe, so that the set part of the core-absorbing geotextile inside the protective pipe is folded and pressed into the drainage groove 2-3.

[0060] Specifically, when disassembling the connecting rod 2-6, gear 2-7, and rotating shaft 2-5 of a protective pipe, and pressing the core-absorbing geotextile into the drainage trough 2-3, firstly, excavate the soil above the adjacent protective pipe, raise the adjacent protective pipe by a set distance, and create operating space for easy disassembly and insertion of the pressure rod. Then, loosen the fixing bolts between the fixing plate at the end of the connecting rod 2-6 and the rotating shaft 2-5, remove the connecting rod 2-6 and gear 2-7, take out the rotating shaft 2-5, and then insert the pressure rod into the inside of the protective pipe, positioned above the core-absorbing geotextile. The construction worker operates the pressure rod to move towards the drainage trough 2-3, folding and pressing the set part of the core-absorbing geotextile into the drainage trough 2-3.

[0061] After construction is completed, the adjacent raised protective pipes are placed back in place, and then the soil is backfilled.

[0062] Preferably, after disassembling the shaft 2-5, connecting rod 2-6 and gear 2-7, silt is laid in the drainage trough 2-3. The silt comes into contact with the core absorbent fabric part pressed into the drainage trough 2-3, which can better guide the moisture of the core absorbent fabric into the drainage trough.

[0063] Alternatively, before laying the wicking geotextile, pre-lay silt in the drainage channel 2-3.

[0064] Using the same method, the rotating shaft 2-5, connecting rod 2-6 and gear 2-7 inside the multiple protective tubes are disassembled in sequence, and the set part of the core soil-absorbing fabric inside the protective tube is folded and pressed into the drainage trough.

[0065] The disassembled connecting rod 2-6, gear 2-7, and shaft 2-5 are recycled for future use, avoiding waste caused by leaving them in the roadbed after construction.

[0066] By pressing the wicking geotextile into the drainage channel 2-3, a path is provided for the wicking geotextile to absorb and drain water. The presence of the drainage channel 2-3 can effectively control the potential backflow phenomenon caused by rainfall infiltration, and achieve continuous control of the internal humidity of the roadbed.

[0067] Step 5: After completing Step 4, fix the portion of the endograft fabric laid on the slope, and lay filler on the entire slope to protect the endograft fabric. At the same time, bury the protective pipe to ensure an aesthetically pleasing effect.

[0068] The fixation method of the core-absorbing geotextile on the slope can be achieved using existing technology, and will not be described in detail here. The fill material can be achieved using existing materials, and will not be described in detail here.

[0069] The locomotor geotextile is rolled into a protective tube before slope treatment construction. After the slope treatment is completed, it is released through a rotating shaft and then spread out and laid flat on the slope. During slope treatment, such as slope brushing, the portion of the locomotor geotextile used for laying on the slope will not be damaged, effectively reducing structural damage during construction, improving the integrity of the locomotor geotextile layout, maximizing the water absorption and drainage characteristics of the locomotor geotextile, ensuring the water-proof and drainage effect of the locomotor geotextile, and fully utilizing its drainage function.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for laying wicking geotextile, characterized in that, Includes the following steps: During the construction of a new roadbed, geotextile is laid inside the roadbed. The geotextile is equipped with a protective device, which includes a protective tube. The protective tube is connected to a rotating shaft through a rotating component, so that the rotating shaft can rotate around its own axis. The geotextile extends into the protective tube and is wound around the rotating shaft. Its movable end extends out of the protective tube. The rotation of the rotating shaft can drive the geotextile to be rolled up and released. The part of the geotextile used to be laid on the slope is rolled up inside the protective tube through the rotating shaft during the construction of the new roadbed. After the slope treatment of the new roadbed is completed, the core absorbent geotextile is released by rotating the shaft, so that the core absorbent geotextile is spread out and laid flat on the slope, and then the core absorbent geotextile is fixed on the slope. The rotating assembly includes a connecting rod, one end of which is detachably connected to the end of the rotating shaft, and the other end is rotatably connected to a support wheel. The support wheel cooperates with an annular guide rail. The support wheel is a gear, and correspondingly, the inner side of the annular guide rail is provided with a gear ring that meshes with the gear. The bottom of the inner cylinder of the protective pipe is provided with a drainage groove. After the core absorbent geotextile is laid flat on the slope, the set part of the core absorbent geotextile located inside the protective pipe is folded and pressed into the drainage groove. The drainage groove is filled with silt and is in contact with the core absorbent geotextile pressed into the drainage groove.

2. The method for laying a wicking geotextile as described in claim 1, characterized in that, After the core-absorbing geotextile is laid flat on the slope, the pivot, support wheel and connecting rod are removed from the protective pipe.

3. The method for laying a wicking geotextile as described in claim 1, characterized in that, The protective tube is provided with an insertion slit for the wicking geotextile to extend into the protective tube and an extension slit for the wicking geotextile to extend out of the protective tube. The width of the insertion slit and the extension slit is greater than the width of the wicking geotextile.

4. The method for laying a wicking geotextile as described in claim 3, characterized in that, The insertion and extension seams are set at obtuse angles along the circumferential interval on the protective pipe wall.

5. The method for laying a wicking geotextile as described in claim 1, characterized in that, One end of the drainage ditch is provided with an insert block, and the other end is provided with a slot that matches the insert block. When the core-absorbing geotextile is laid, the drainage ditches of adjacent protective pipes are connected by inserting to form a drainage channel along the longitudinal direction of the newly built roadbed.

6. The method for laying a wicking geotextile as described in claim 1, characterized in that, After the geotextile is fixed on the slope surface, it is covered with filler material for protection.

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