Slope protection construction method using green recyclable anchor cable

Abstract

This application relates to the field of slope protection technology, and particularly to a slope protection construction method using green and recyclable anchor cables. A predetermined length of empty pile is reserved above the drilled interlocking piles to provide space for subsequent slope excavation. Slope excavation is then carried out within the reserved empty pile area, thus forming a slope structure on the side above the drilled interlocking piles at the edge of the foundation pit. By constructing the slope structure on the side above the drilled interlocking piles at the edge of the foundation pit and implementing protective measures on the slope structure, the post-rainwater absorption of the soil below the slope structure can be significantly reduced, i.e., the water absorption rate of the soil surrounding the foundation pit can be minimized. This greatly reduces the pressure of the surrounding soil on the drilled interlocking piles, which is beneficial to improving the safety of the foundation pit protection. Before anchor cable recycling, plain concrete is backfilled between the underground structure and the piles, which facilitates the reuse of the anchor cables.

Description

Technical Field

[0001] This application relates to the field of slope protection technology, and in particular to a slope protection construction method using green and recyclable anchor cables. Background Technology

[0002] Slope protection refers to the measures taken to support, reinforce, and protect slopes to ensure their safety and that of their environment. It is widely used in engineering fields such as building construction, roadbed construction, and foundation pit excavation. In the field of foundation pits, the core function of slope protection is to prevent the collapse of the pit's sidewalls, slope slippage, and surface cracking, as well as to prevent rainwater from eroding and softening the soil, protecting surrounding roads, pipelines, existing buildings, and ensuring the safety of construction personnel and machinery within the foundation pit.

[0003] In existing foundation pit slope protection construction, the pile-and-wall structure is directly constructed at the edge of the foundation pit for protection. When the soil around the foundation pit has high water absorption, the soil around the foundation pit will absorb water after rain, which will put great pressure on the pile-and-wall structure and compromise the safety of the foundation pit protection. In addition, since some foundation pit slope protection structures are temporary support and protection projects, the anchor rods and anchor cables in the existing slope protection structures have extremely low recycling efficiency after use. Some anchor rods and anchor cables cannot even be recycled at all, which greatly increases the construction cost of slope protection.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide a slope construction method using green and recyclable anchor cables to solve or alleviate the problems existing in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: A slope construction method using green recyclable anchor cables, the method comprising the following steps: Step 1: Level the site and construct bored interlocking piles at the edge of the foundation pit. Leave a blank pile of a set length above each bored interlocking pile. Step 2: Carry out slope excavation within the reserved empty pile area to form a slope at the edge of the foundation pit, and set up protective measures on the slope; Then, continue excavating downwards from the inside of the pile body to the position below the capping beam to be constructed. Then, construct the capping beam at the top of the bored interlocking pile and construct recyclable anchor cables from the inside of the capping beam to the outside of the soil. Step 3: Continue excavating downwards inside the pile body until the bottom of the pit is reached; at each set excavation distance, a recyclable anchor cable is installed from the inside of the pile body outwards into the soil. Step 4: Construct the structural foundation in the foundation pit and backfill the gap between the structural foundation and the piles with plain concrete. Step 5: Construct underground structures such as structural side walls and floor slabs above the structural foundation. As the construction height of the underground structure increases, gradually recover the recyclable anchor cables at the corresponding height, and backfill plain concrete between the underground structure and the pile body. Step 6: After the underground structure construction is completed, backfill and compact the soil in the foundation pit and slope.

[0007] In the slope construction method using green and recyclable anchor cables as described above, preferably, the bored interlocking piles include plain concrete piles and reinforced concrete piles, which are arranged alternately.

[0008] In the slope construction method using green recyclable anchor cables as described above, preferably, the recyclable anchor cables are constructed by penetrating plain concrete piles.

[0009] In the slope construction method using green recyclable anchor cables as described above, preferably, the recyclable anchor cable includes a pad, a locking device, an anchor head, a protective sleeve, and multiple cable bodies; One end of each of the multiple cable bodies passes through the pad and is locked in the lock. The other ends of the multiple cable bodies can be detached and assembled in the anchor head. The protective sleeve is set around the locking rod cable body.

[0010] In the slope construction method using green recyclable anchor cables as described above, preferably, the anchor head includes a cylinder and a plurality of locking blocks, each locking block being rotatably disposed in the cylinder; The number of locking blocks is the same as the number of cable bodies. Each cable body extends into the cylinder and reaches the position of the locking block. The cable body is pressed and fixed in the cylinder by rotating the locking block.

[0011] In the slope construction method using green recyclable anchor cables as described above, preferably, the locking block has a friction surface on the side facing the cable body, and the friction surface has a serrated structure, and the friction surface of the locking block is pressed against the cable body.

[0012] In the slope construction method using green recyclable anchor cables as described above, preferably, the cylinder is axially movable with a locking rod, a transmission line is connected between the bottom end of the locking rod and each locking block, and a pull rope is connected to the top end of the locking rod, with the pull rope extending beyond the pad and the lock.

[0013] In the slope construction method using green recyclable anchor cables as described above, preferably, a baffle is provided at the lower part of the locking rod, and a through hole is provided at the center of the top of the cylinder, with the locking rod being guided and movably positioned in the through hole of the cylinder; A reset spring is also provided between the baffle and the top of the cylinder, and the reset spring is sleeved around the locking rod.

[0014] In the slope construction method using green recyclable anchor cables as described above, preferably, in step 2, a composite protective layer is covered on the slope, and the composite protective layer is fixed to the slope by reinforcing bars.

[0015] In the slope construction method using green and recyclable anchor cables as described above, preferably, the composite protective layer consists of a plastic base layer, a waterproof layer, a geotextile layer, and a mesh reinforcement layer from bottom to top.

[0016] Compared with the closest prior art, the technical solution of this application has the following beneficial effects: In this construction method, a predetermined length of empty pile is reserved above the drilled interlocking piles to provide space for subsequent slope excavation. Slope excavation is then carried out within the reserved empty pile area, forming a slope on the edge of the foundation pit. This slope structure is located on the side above the drilled interlocking piles. By constructing the slope structure on the side above the drilled interlocking piles at the edge of the foundation pit and implementing protective measures on the slope structure, the post-rainwater absorption of the soil below the slope structure can be significantly reduced, thus minimizing the water absorption rate of the soil surrounding the foundation pit. This greatly reduces the pressure of the surrounding soil on the drilled interlocking piles, improving the safety of the foundation pit protection.

[0017] By installing recyclable anchor cables from the inside of the bored interlocking pile to the outside of the soil, the recyclable anchor cables can further strengthen the support of the bored interlocking pile, which is beneficial to improving the safety of the foundation pit protection.

[0018] As the height of the underground structure increases, plain concrete needs to be backfilled between the underground structure and the pile. Before backfilling the plain concrete, the recyclable anchor cables of the corresponding height are gradually recovered. Since the backfilled plain concrete plays a supporting role between the underground structure and the pile, it ensures that the safety of the drilled interlocking pile is not affected after the anchor cables are recovered. Furthermore, by recovering the recyclable anchor cables, the construction cost can be greatly reduced, which is conducive to the reuse of anchor cables. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is a schematic diagram of step 1 of a construction method provided according to some embodiments of this application; Figure 2 This is a schematic diagram of step 2 of the construction method provided according to some embodiments of this application; Figure 3 This is a schematic diagram of step 3 of the construction method provided according to some embodiments of this application; Figure 4This is a schematic diagram of step 4 of the construction method provided according to some embodiments of this application; Figure 5 This is a schematic diagram of step 5 of the construction method provided according to some embodiments of this application; Figure 6 This is a schematic diagram of step 6 of the construction method provided according to some embodiments of this application; Figure 7 This is a schematic diagram of the structure of a recyclable anchor cable provided according to some embodiments of this application; Figure 8 This is a partially enlarged schematic diagram of a locking block locking cable provided according to some embodiments of this application; Figure 9 This is a partially enlarged schematic diagram of a locking block after it has been unlocked, according to some embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Drilled interlocking piles; 2. Empty piles; 3. Crown beams; 4. Slopes; 5. Recyclable anchor cables; 501. Locks; 502. Pads; 503. Cable bodies; 504. Protective sleeves; 505. Cylinders; 506. Locking blocks; 507. Pull ropes; 508. Transmission lines; 509. Locking rods; 510. Return springs; 6. Underground structures; 7. Covering soil. Detailed Implementation

[0021] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of interpretation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature represented or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0022] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0024] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] The present application will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0026] According to specific embodiments of this application, such as Figure 1-9 As shown, this application provides a slope construction method using green recyclable anchor cables, the construction method including the following steps: Step 1: Level the site and construct bored interlocking piles 1 at the edge of the foundation pit. Leave a blank pile 2 of a set length above each pile of the bored interlocking pile 1. Step 2: Slope excavation work is carried out within the area of ​​the reserved empty pile 2 to form a slope 4 at the edge of the foundation pit, and protective measures are set on the slope 4. Then, continue excavating downwards from the inside of the pile body to the position below the crown beam 3 to be constructed. Then, construct the crown beam 3 on the top of the drilled interlocking pile 1, and construct the recyclable anchor cable 5 from the inside of the crown beam 3 to the outside of the soil. Step 3: Continue excavating downwards inside the pile body until the bottom of the pit is reached; at each set excavation distance, a recyclable anchor cable 5 is installed from the inside of the pile body outwards into the soil. Step 4: Construct the structural foundation in the foundation pit and backfill the gap between the structural foundation and the piles with plain concrete. Step 5: Construct underground structures 6, such as structural side walls and floor slabs, above the structural foundation. As the construction height of underground structure 6 increases, gradually recover the recyclable anchor cables 5 at the corresponding height, and backfill plain concrete between underground structure 6 and pile body. Step 6: After the underground structure 6 is completed, backfill the foundation pit and slope 4 with soil 7 and compact it.

[0027] In this construction method, a pre-reserved empty pile 2 of a predetermined length is left above the bored interlocking pile 1 to provide space for subsequent slope excavation. Then, slope excavation is carried out within the reserved empty pile 2 area, thereby forming slope 4 on the edge of the foundation pit. This slope 4 structure is located on the side above the bored interlocking pile 1. By constructing the slope 4 structure on the side above the bored interlocking pile 1 at the edge of the foundation pit and setting protective measures on the slope 4 structure, the water absorption of the soil below the slope 4 structure after rain can be greatly reduced, that is, the water absorption rate of the soil around the foundation pit can be minimized as much as possible. This greatly reduces the pressure of the soil around the foundation pit on the bored interlocking pile 1, which is beneficial to improving the safety of the foundation pit protection.

[0028] By constructing recyclable anchor cables 5 from the inside of the drilled interlocking pile 1 to the outside of the soil, the recyclable anchor cables 5 can further strengthen the support of the drilled interlocking pile 1, which is conducive to improving the safety of the foundation pit protection.

[0029] As the construction height of underground structure 6 increases, plain concrete needs to be backfilled between underground structure 6 and the pile. Before backfilling the plain concrete, the recyclable anchor cables 5 at the corresponding height are gradually recovered. Since the backfilled plain concrete plays a supporting role between underground structure 6 and the pile, it ensures that the protective safety of the drilled interlocking pile 1 will not be affected after the anchor cables are recovered. Furthermore, by recovering the recyclable anchor cables 5, the construction cost can be greatly reduced, which is conducive to realizing the reuse of anchor cables.

[0030] The bored interlocking pile 1 includes plain concrete piles and reinforced concrete piles, which are arranged alternately. In this embodiment, all plain concrete piles are constructed at intervals first, and then reinforced concrete piles are constructed between two adjacent plain concrete piles, so that the adjacent reinforced concrete piles and plain concrete piles interlock to form a pile-wall structure.

[0031] The recyclable anchor cable 5 is installed through the plain concrete pile. In this embodiment, the recyclable anchor cable 5 is installed only in the plain concrete pile, so that the recyclable anchor cable 5 avoids the reinforced concrete pile, thereby avoiding mutual interference between the recyclable anchor cable 5 and the reinforcing steel in the reinforced concrete pile.

[0032] The recyclable anchor cable 5 includes a pad 502, a lock 501, an anchor head, a protective sleeve 504, and multiple cable bodies 503. One end of each cable body 503 passes through the pad 502 and is locked in the lock 501. The other ends of each cable body 503 are detachably assembled into the anchor head. The protective sleeve 504 is disposed around the cable body 503. In this embodiment, the lock 501 is provided with multiple conical holes, each cable body 503 passes through one conical hole, and multiple conical clips are provided in each conical hole. The multiple conical clips surround the cable body 503 to lock one end of the cable body 503 onto the lock 501.

[0033] The anchoring head includes a cylindrical body 505 and multiple locking blocks 506, each locking block 506 being rotatably disposed within the cylindrical body 505. The number of locking blocks 506 is the same as the number of cables 503. Each cable 503 extends into the cylindrical body 505 and reaches the position of a locking block 506. By rotating the locking blocks 506, the cable 503 is pressed and fixed within the cylindrical body 505. In this embodiment, the top of the cylindrical body 505 is provided with multiple through holes, and each cable 503 passes through the through holes at the top of the cylindrical body 505 and extends into the position of a locking block 506 within the cylindrical body 505. The number of cables 503 can be 2, 3, 4, 5, 6, etc., and the multiple cables 503 are evenly arranged along the axis of the cylindrical body 505.

[0034] During normal use of the recyclable anchor cable 5, by rotating the locking block 506, the locking block 506 presses and fixes the cable body 503 in the cylinder 505 of the anchor head. At this time, the recyclable anchor cable 5 is used as a whole under force. When it is necessary to recycle the anchor cable, simply rotate the locking block 506 in the opposite direction to release the locking block 506 from pressing and locking the cable body 503, and then pull the cable body 503 out of the cylinder 505 of the anchor head to complete the recycling of the cable body 503.

[0035] The locking block 506 has a friction surface on the side facing the cable body 503, and the friction surface has a serrated structure. The friction surface of the locking block 506 presses against the cable body 503. In this embodiment, the serrated structure on the friction surface of the locking block 506 increases the interlocking force between the locking block 506 and the cable body 503 when the friction surface of the locking block 506 is pressed against the cable body 503, thereby ensuring that the cable body 503 can be stably and reliably pressed into the cylinder 505 of the anchor head.

[0036] A locking rod 509 is movably provided in the cylinder 505 along the axial direction. A transmission line 508 is connected between the bottom end of the locking rod 509 and each locking block 506. A pull rope 507 is connected to the top end of the locking rod 509. The pull rope 507 extends out of the pad 502 and the lock 501.

[0037] In this embodiment, the pull rope 507 is located at the center of multiple cable bodies 503, and a protective sleeve 504 is provided around the multiple cable bodies 503. The protective sleeve 504 prevents slurry from entering the gaps between the cable bodies 503 in the borehole, so as to ensure the effectiveness of the pull rope 507 during use.

[0038] By pulling the rope 507 outward, the locking lever 509 moves upward. The locking lever 509 drives all the locking blocks 506 synchronously through the transmission line 508, so that the locking blocks 506 press the rope body 503 into the cylinder 505. Then, the end of the rope 507 is fixed outside the lock 501.

[0039] A baffle is provided at the lower part of the locking rod 509, and a through hole is provided at the center of the top of the cylinder 505. The locking rod 509 is guided and movably disposed in the through hole of the cylinder 505. A return spring 510 is also provided between the baffle and the top of the cylinder 505, and the return spring 510 is sleeved on the periphery of the locking rod 509.

[0040] In this embodiment, a nut is installed on a section of the locking rod 509 that extends out of the top of the cylinder 505 to prevent the locking rod 509 from being completely retracted into the cylinder 505, so as to facilitate the preliminary assembly of the retrievable anchor cable 5.

[0041] Before installing the recyclable anchor cable 5, it should be assembled in advance, and the cable body 503 should be fixed in the housing of the anchor head to facilitate its use. When the recyclable anchor cable 5 needs to be installed, grouting should be performed in the borehole first, and then the recyclable anchor cable 5 should be inserted into the borehole. Then, according to the usage requirements, after the grout in the borehole has solidified to the set strength, the cable body 503 should be tensioned and the end of the cable body 503 should be locked with the locking device 501 to complete the installation and fixation of the recyclable anchor cable 5. When the recyclable anchor cable 5 needs to be recovered, the pull rope 507 is released. Under the action of the return spring 510, the locking rod moves downward. At this time, the transmission line 508 no longer restricts the locking block 506, that is, it contacts the locking block 506's pressing and locking effect on the cable body 503. Then, the cable body 503 can be pulled up directly to easily pull the cable body 503 out of the borehole, realizing the recovery of the cable body 503, which is conducive to the reuse of the cable body 503; while the anchor head of the recyclable anchor cable 5 remains in the borehole.

[0042] In step 2, a composite protective layer is laid on the slope 4, and the composite protective layer is fixed to the slope 4 by reinforcing bars. In this embodiment, one end of the reinforcing bar is first anchored to the slope 4, and then the composite protective layer is laid on the slope 4. The reinforcing bars penetrate the composite protective layer, and the gap between the composite protective layer and the reinforcing bars is sealed to ensure that the entire composite protective layer has good waterproof performance. Steel wire ropes are strung between adjacent reinforcing bars, and the reinforcing bars and steel wire ropes work together to bind the composite protective layer to fix it to the slope 4.

[0043] The composite protective layer, from bottom to top, consists of a plastic base layer, a waterproof layer, a geotextile layer, and a mesh reinforcement layer. In this embodiment, the plastic base layer is made of engineering plastic, which has a certain structural strength and is laid at the bottom to provide basic protection. The waterproof layer uses polymer roll material and plays a major role in waterproofing. The geotextile layer uses waterproof geotextile, which is laid on top of the waterproof layer. By setting the plastic base layer below the waterproof layer and the geotextile layer above it, the waterproof layer is protected and its waterproofing function is better enhanced. The mesh reinforcement layer uses geogrid, which covers the waterproof geotextile for better protection. The composite protective layer, constructed with these four layers, has good waterproof performance. This composite protective layer can also be recycled after use; specifically, it can be recycled before backfilling with soil.

[0044] In this embodiment, multiple drainage pipes can also be installed on the slope 4. The drainage pipes penetrate the composite protective layer, with one end inserted into the inside of the slope 4 and the other end extending out of the outside of the slope 4. The drainage pipes are inclined downwards to facilitate the drainage of water from the slope 4.

[0045] 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 slope construction method using green recyclable anchor cables, characterized in that, The construction method includes the following steps: Step 1: Level the site and construct bored interlocking piles at the edge of the foundation pit. Leave a blank pile of a set length above each bored interlocking pile. Step 2: Carry out slope excavation within the reserved empty pile area to form a slope at the edge of the foundation pit, and set up protective measures on the slope; Then, continue excavating downwards from the inside of the pile body to the position below the capping beam to be constructed. Then, construct the capping beam at the top of the bored interlocking pile and construct recyclable anchor cables from the inside of the capping beam to the outside of the soil. Step 3: Continue excavating downwards inside the pile body until the bottom of the pit is reached; at each set excavation distance, a recyclable anchor cable is installed from the inside of the pile body outwards into the soil. Step 4: Construct the structural foundation in the foundation pit and backfill the gap between the structural foundation and the piles with plain concrete. Step 5: Construct underground structures such as structural side walls and floor slabs above the structural foundation. As the construction height of the underground structure increases, gradually recover the recyclable anchor cables at the corresponding height, and backfill plain concrete between the underground structure and the pile body. Step 6: After the underground structure construction is completed, backfill and compact the soil in the foundation pit and slope.

2. The slope construction method using green recyclable anchor cables according to claim 1, characterized in that, The bored interlocking piles include plain concrete piles and reinforced concrete piles, which are arranged alternately.

3. The slope construction method using green recyclable anchor cables according to claim 2, characterized in that, The recyclable anchor cable is used for construction through plain concrete piles.

4. The slope construction method using green recyclable anchor cables according to claim 3, characterized in that, The recyclable anchor cable includes a pad, a lock, an anchor head, a protective sleeve, and multiple cable bodies; One end of each of the multiple cable bodies passes through the pad and is locked in the lock. The other ends of the multiple cable bodies can be detached and assembled in the anchor head. The protective sleeve is set around the locking rod cable body.

5. The slope construction method using green recyclable anchor cables according to claim 4, characterized in that, The anchoring head includes a cylindrical body and multiple locking blocks, each locking block being rotatably disposed within the cylindrical body; The number of locking blocks is the same as the number of cable bodies. Each cable body extends into the cylinder and reaches the position of the locking block. The cable body is pressed and fixed in the cylinder by rotating the locking block.

6. The slope construction method using green recyclable anchor cables according to claim 5, characterized in that, The locking block has a friction surface on the side facing the cable body, and the friction surface has a serrated structure. The friction surface of the locking block is pressed against the cable body.

7. The slope construction method using green recyclable anchor cables according to claim 5, characterized in that, The cylinder is axially movable with a locking rod. A transmission line is connected between the bottom end of the locking rod and each locking block. A pull rope is connected to the top end of the locking rod, and the pull rope extends beyond the pad and the lock.

8. The slope construction method using green recyclable anchor cables according to claim 7, characterized in that, A baffle is provided at the lower part of the locking rod, and a through hole is provided at the center of the top of the cylinder. The locking rod is guided and movably installed in the through hole of the cylinder. A reset spring is also provided between the baffle and the top of the cylinder, and the reset spring is sleeved around the locking rod.

9. The slope construction method using green recyclable anchor cables according to claim 7, characterized in that, In step 2, a composite protective layer is applied to the slope, and the composite protective layer is fixed to the slope by reinforcing bars.

10. The slope construction method using green recyclable anchor cables according to claim 9, characterized in that, The composite protective layer consists of, from bottom to top, a plastic base layer, a waterproof layer, a geotextile layer, and a mesh reinforcement layer.

Images