A lattice-type double-row pile-slab wall slope protection system and its construction method

Abstract

This invention discloses a lattice-type double-row pile-slab wall slope protection system and its construction method, comprising inner row underground support piles, inner row above-ground support piles, outer row underground support piles, and outer row above-ground support piles arranged in parallel. All three rows are lattice-type structures. The inner and outer rows of above-ground support piles are located directly above the inner and outer rows of underground support piles, respectively. An inner row bottom capping beam connects the inner row of underground support piles to the inner row of above-ground support piles, and an outer row bottom capping beam connects the outer row of underground support piles to the outer row of above-ground support piles. The lattice-type double-row pile-slab wall slope protection system of this invention ensures long-term stable and effective operation in slope protection environments with large elevation differences and provides effective seismic resistance through its structural form.

Description

Technical Field

[0001] This invention belongs to the field of civil engineering technology, specifically relating to a lattice-type double-row pile-slab wall slope protection system and its construction method. Background Technology

[0002] Existing slope protection technologies include gravity retaining walls, cantilever retaining walls, cable anchoring, and pile-slab walls. However, these methods have the following drawbacks:

[0003] Gravity retaining walls: require a large amount of concrete and steel reinforcement, occupy a large area, and have a high cost.

[0004] Cantilever retaining walls: This type of retaining wall is prone to both horizontal slippage and vertical rotation. When the height is low and the soil moisture content is high, sand inrush is likely to occur, which can lead to large displacement or overturning of the retaining wall, posing certain safety risks.

[0005] Anchor cable support: This type of support is generally a temporary structure and the internal anchor cables are made of steel bars, which are prone to corrosion and damage over long-term use.

[0006] Single-row pile-slab wall: The pile diameter is relatively large and the pile spacing is relatively close; the structural steel and concrete consumption is large, which is uneconomical.

[0007] This invention mainly addresses slope protection systems in environments with significant elevation differences. It utilizes a lattice-type double-row pile-slab wall slope protection system to ensure long-term stable and effective operation in such environments, and provides effective seismic resistance through its structural form. Summary of the Invention

[0008] The purpose of this invention is to provide a lattice-type double-row pile-slab wall slope protection system and its construction method to solve the above-mentioned problems existing in the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A lattice-type double-row pile-slab wall slope protection system includes inner row underground support piles, inner row above-ground support piles, outer row underground support piles, and outer row above-ground support piles arranged parallel to each other. All three rows of underground support piles are lattice-type structures. The inner row above-ground support piles and outer row above-ground support piles are located directly above the inner row underground support piles and outer row above-ground support piles, respectively. The inner row of underground support piles and the outer row of above-ground support piles are connected by an inner row bottom capping beam. An inner row top capping beam is provided on the top of the inner row of above-ground support piles, and an outer row top capping beam is provided on the top of the outer row of above-ground support piles. A connecting plate is connected between the inner row top capping beam and the outer row top capping beam. Several connecting beams are connected between the inner row of above-ground support piles and the outer row of above-ground support piles. A backfill layer is filled between the inner row of above-ground support piles and the outer row of above-ground support piles.

[0011] The working process and principle of the above structure are as follows:

[0012] The use of underground support piles in conjunction with above-ground support piles provides double-layer stability, preventing soil erosion. The double-layered arrangement of inner and outer rows of above-ground and underground support piles enhances the slope protection capacity of the double-row pile-slab wall. The lattice structure minimizes stress concentration, ensuring the strength and stability of the double-row pile-slab wall. Backfill layers are used to fill the space between the inner and outer rows of above-ground and underground support piles, guaranteeing their support resistance strength. The bottom capping beam of the inner row connects the inner row of above-ground and underground support piles. The retaining piles are connected as one unit. The outer row bottom capping beam is used to connect the outer row of above-ground support piles and the outer row of underground support piles as one unit. At the same time, both the inner row bottom capping beam and the outer row bottom capping beam are used to connect multiple underground support piles into a row. The top capping beam connects the above-ground support piles in the same row into a whole. The outer row of above-ground support piles are then connected to the inner row of above-ground support piles into a whole unit at intervals using connecting beams. The connecting plate connects the inner row top capping beam and the outer row top capping beam together. The construction area is carried out in layers to ensure that the backfill compaction meets the requirements and to avoid damage to the connecting beams during compaction.

[0013] Furthermore, the inner row of underground support piles includes a number of vertically arranged underground support piles horizontally at equal intervals, and the inner row of above-ground support piles includes a number of vertically arranged above-ground support piles horizontally at equal intervals. The number of underground support piles is the same as the number of above-ground support piles and they correspond one-to-one. The structure of the outer row of underground support piles is the same as the structure of the inner row of underground support piles, and the structure of the outer row of above-ground support piles is the same as the structure of the outer row of underground support piles.

[0014] The use of multiple equally spaced horizontally arranged underground support piles helps to form a lattice structure. The inner and outer rows of support piles have the same structure, and the stability of the slope support system is ensured by relying on double-row protection.

[0015] Furthermore, a concrete slab is poured on the outside of the external drainage support piles, and drainage holes are evenly spaced on the concrete slab.

[0016] The concrete slab is used to ensure the protective capacity of the externally laid support piles. Drainage holes are provided on the concrete slab to facilitate the drainage of seepage water and prevent it from affecting the stability of the double-row pile wall.

[0017] A construction method for a lattice-type double-row pile-slab wall slope protection system includes the following steps:

[0018] S1. Level the site;

[0019] S2. Locate the underground support piles and perform hole drilling operations at equal intervals on the site;

[0020] S3. Place the pre-made steel cage into the hole and pour concrete.

[0021] S4. After all the underground support piles are completed, the bottom cap beam reinforcement is fabricated, and after the formwork is erected, the bottom cap beam concrete is poured.

[0022] S5. Divide the above-ground construction section according to the elevation of the connecting beams, ensuring that the connecting beams are all below the construction layer after the division.

[0023] S6. Construction is carried out in sections according to the height division. The first section is constructed by pouring the ground support piles, pouring the concrete slab, and opening drainage holes. After the construction is completed, the earthwork backfilling operation is carried out after the concrete strength grade reaches the requirements.

[0024] S7. Standard section construction: In accordance with the formwork requirements for setting up connecting beams, pouring above-ground support piles, and pouring concrete slabs, the construction procedures of setting up, making steel bars, and pouring concrete shall be carried out. After the construction is completed, earthwork backfilling shall be carried out after the concrete strength grade reaches the requirements.

[0025] S8. Repeat step S7 until the bottom elevation of the top cap beam is reached, and carry out the construction procedures of top cap beam formwork erection, steel bar fabrication, and concrete pouring.

[0026] S9. Backfill soil to the bottom elevation of the connecting plate and then pour the connecting plate reinforcement and concrete.

[0027] Furthermore, in step S1, during the site leveling process, the site is cleaned in the slope protection construction area, the slope is sloped as required, and leveling is carried out at both the top and bottom of the slope to ensure that the flatness and elevation meet the requirements.

[0028] Furthermore, in step S2, the positioning method adopts line-layout positioning, and the excavated holes are located in a row.

[0029] Furthermore, the earthwork backfilling operation is carried out in layers and sections, with each layer compacted and inspected until the backfill reaches the bottom surface of the upper pouring section.

[0030] Beneficial Effects: This invention solves the problem of slope protection with large elevation differences by providing a lattice-type double-row pile-slab wall slope protection system and its construction method. The system consists of two rows of piles connected as a whole by a capping beam, connecting beam, connecting slab, and concrete slab. The construction method is relatively simple. The double-row piles forming a unified structure effectively reduce the weight of the structure itself and lower costs even with increased system cross-section and slope protection height. The lattice structure provides superior seismic performance compared to other structures through its structural form. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a front view of the inner and outer rows of support piles in this invention;

[0033] Figure 3 This is a side view of the inner and outer rows of support piles in this invention;

[0034] Figure 4 for Figure 3 Sectional view of AA;

[0035] Figure 5 for Figure 3 Sectional view of BB;

[0036] Figure 6 This is a flowchart of the construction process of the present invention.

[0037] Attached reference numerals: 1. Inner row of underground support piles; 2. Inner row of above-ground support piles; 3. Outer row of underground support piles; 4. Outer row of above-ground support piles; 5. Inner row bottom capping beam; 6. Outer row bottom capping beam; 7. Inner row top capping beam; 8. Outer row top capping beam; 9. Connecting plate; 10. Connecting beam; 11. Backfill layer; 12. Concrete slab; 13. Drainage hole. Detailed Implementation

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention. Example

[0039] like Figures 1-5 As shown, this embodiment provides a lattice-type double-row pile-slab wall slope protection system, including an inner row of underground support piles 1, an inner row of above-ground support piles 2, an outer row of underground support piles 3, and an outer row of above-ground support piles 4 arranged parallel to each other. The inner row of underground support piles 1, the inner row of above-ground support piles 2, the outer row of underground support piles 3, and the outer row of above-ground support piles 4 all have a lattice structure. The inner row of above-ground support piles 2 and the outer row of above-ground support piles 4 are located directly above the inner row of underground support piles 1 and the outer row of underground support piles 3, respectively. The inner row of underground support piles 1 and the inner row of above-ground support piles 4 are connected in a lattice structure. The inner row of bottom capping beams 5 connect the support piles 2, the outer row of underground support piles 3 and the outer row of above-ground support piles 4 are connected by the outer row of bottom capping beams 6, the inner row of top capping beams 7 are set on the top of the inner row of above-ground support piles 2, the outer row of top capping beams 8 are set on the top of the outer row of above-ground support piles 4, the inner row of top capping beams 7 and the outer row of top capping beams 8 are connected by connecting plates 9, the inner row of above-ground support piles 2 and the outer row of above-ground support piles 4 are connected by several connecting beams 10, and the inner row of above-ground support piles 2 and the outer row of above-ground support piles 4 are filled with backfill layer 11.

[0040] The working process and principle of the above structure are as follows:

[0041] The combination of underground and above-ground support piles provides double stability, preventing soil erosion. The double-layered arrangement of inner row above-ground support piles 2, inner row underground support piles 1, outer row above-ground support piles 4, and outer row underground support piles 3 enhances the slope protection capacity of the double-row pile-slab wall. The lattice structure minimizes stress concentration, ensuring the strength and stability of the double-row pile-slab wall. Backfill layer 11 fills the space between the inner row above-ground support piles 2 and the outer row above-ground support piles 4, ensuring their support resistance strength. The inner row bottom cap beam 5 connects the inner row above-ground support piles 2 and the inner row underground support piles. 1. The outer row bottom capping beam 6 is used to connect the outer row of above-ground support piles 4 and the outer row of underground support piles 3 into one unit. At the same time, both the inner row bottom capping beam 5 and the outer row bottom capping beam 6 are used to connect multiple underground support piles into a row. The top capping beam connects the above-ground support piles in the same row into a whole. The outer row of above-ground support piles 4 are then connected to the inner row of above-ground support piles 2 into a whole unit at intervals using connecting beams 10. The connecting plate 9 connects the inner row top capping beam 7 and the outer row top capping beam 8 together. The construction area is carried out in layers to ensure that the backfill compaction meets the requirements and to avoid damage to the connecting beams 10 during compaction.

[0042] In another embodiment of the invention, such as Figures 1-5 As shown, the inner row of underground support piles 1 includes several vertically arranged underground support piles that are horizontally arranged at equal intervals, and the inner row of above-ground support piles 2 includes several vertically arranged above-ground support piles that are horizontally arranged at equal intervals. The number of underground support piles is the same as the number of above-ground support piles and they correspond one-to-one. The structure of the outer row of underground support piles 3 is the same as the structure of the inner row of underground support piles 1, and the structure of the outer row of above-ground support piles 4 is the same as the structure of the outer row of underground support piles 3.

[0043] The use of multiple equally spaced horizontally arranged underground support piles helps to form a lattice structure. The inner and outer rows of support piles have the same structure, and the stability of the slope support system is ensured by relying on double-row protection.

[0044] In another embodiment of the invention, such as Figures 1-5 As shown, a concrete slab 12 is poured on the outside of the outer ground support pile 4, and drainage holes 13 are opened at equal intervals on the concrete slab 12.

[0045] The concrete slab 12 is used to ensure the protective capacity of the external ground support piles 4. Drainage holes 13 are provided on the concrete slab 12 to facilitate the drainage of seepage water and prevent it from affecting the stability of the double-row pile wall.

[0046] like Figures 1-6 As shown, a construction method for a lattice-type double-row pile-slab wall slope protection system includes the following steps:

[0047] S1. Level the site;

[0048] S2. Locate the underground support piles and perform hole drilling at equal intervals on the site; during hole drilling, adjacent pile holes should be kept at a certain distance to avoid hole collapse.

[0049] S3. Place the pre-made steel cage into the hole and pour concrete.

[0050] S4. After all the underground support piles are completed, the bottom cap beam reinforcement is fabricated, and after the formwork is erected, the bottom cap beam concrete is poured.

[0051] S5. Divide the above-ground construction section according to the elevation of the connecting beam 10, and ensure that the connecting beam 10 is all below the construction layer after the division.

[0052] S6. According to the height division, the construction is carried out in sections. The first section is poured with ground support piles, concrete slab 12 and drainage holes 13. After the construction is completed, the earthwork backfilling operation is carried out after the concrete strength grade reaches the requirements. The backfilling operation uses materials such as lime soil that can be hardened after backfilling.

[0053] S7. Standard section construction: In accordance with the formwork requirements for setting up connecting beam 10, pouring above-ground support piles, and pouring concrete slab 12, the construction process of setting up, making steel bars, and pouring concrete shall be carried out. After the construction is completed, earthwork backfilling shall be carried out after the concrete strength grade reaches the requirements.

[0054] S8. Repeat step S7 until the bottom elevation of the top cap beam is reached, and carry out the construction procedures of top cap beam formwork erection, steel bar fabrication, and concrete pouring.

[0055] S9. Backfill soil to the bottom elevation of the connecting plate and then pour the connecting plate reinforcement and concrete.

[0056] In another embodiment of the present invention, in step S1, during the site leveling process, the site is cleaned in the slope protection construction area, the slope is sloped as required, and leveling is carried out at both the top and bottom of the slope to ensure that the flatness and elevation meet the requirements.

[0057] In another embodiment of the present invention, in step S2, the positioning method adopts line-layout positioning, and the excavated holes are located in a row.

[0058] In another embodiment of the present invention, the earthwork backfilling operation is carried out in layers and sections, with each layer being compacted and inspected until the backfill reaches the bottom surface of the upper pouring section.

[0059] The earthwork backfilling is carried out in layers and sections, resulting in stronger compaction and ensuring its firmness.

[0060] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lattice double-row pile sheet-pile wall slope support system characterized by, The system includes parallel inner row underground support piles, inner row above-ground support piles, outer row underground support piles, and outer row above-ground support piles, all of which have a lattice structure. The inner row above-ground support piles and outer row above-ground support piles are located directly above the inner row underground support piles and outer row above-ground support piles, respectively. An inner row bottom capping beam connects the inner row underground support piles and the inner row above-ground support piles, and an outer row bottom capping beam connects the outer row underground support piles and the outer row above-ground support piles. An inner row top capping beam is provided at the top of the inner row above-ground support piles, and an outer row top capping beam is provided at the top of the outer row above-ground support piles. A connecting plate connects the inner row top capping beam and the outer row top capping beam. Several connecting beams connect the inner row above-ground support piles and the outer row above-ground support piles, and a backfill layer fills the space between the inner row above-ground support piles and the outer row above-ground support piles.

2. The lattice double-row-pile sheet-pile wall slope protection system according to claim 1, characterized in that, The inner row of underground support piles includes several vertically arranged underground support piles that are horizontally spaced at equal intervals. The inner row of above-ground support piles includes several vertically arranged above-ground support piles that are horizontally spaced at equal intervals. The number of underground support piles is the same as the number of above-ground support piles and they correspond one-to-one. The structure of the outer row of underground support piles is the same as that of the inner row of underground support piles. The structure of the outer row of above-ground support piles is the same as that of the outer row of underground support piles.

3. The lattice double-row-pile sheet-pile wall slope protection system according to claim 1, characterized in that, A concrete slab is poured on the outside of the external drainage support piles, and drainage holes are evenly spaced on the concrete slab.

4. A construction method for a lattice-type double-row pile-slab wall slope protection system as described in claim 1, characterized in that, Includes the following steps: S1. Level the site; S2. Locate the underground support piles and perform hole drilling operations at equal intervals on the site; S3. Place the pre-made steel cage into the hole and pour concrete. S4. After all the underground support piles are completed, the bottom cap beam reinforcement is fabricated, and after the formwork is erected, the bottom cap beam concrete is poured. S5. Divide the above-ground construction section according to the elevation of the connecting beams, ensuring that the connecting beams are all below the construction layer after the division. S6. Construction is carried out in sections according to the height division. The first section is constructed by pouring the ground support piles, pouring the concrete slab, and opening the drainage holes. After the construction is completed, the earthwork backfilling operation is carried out after the concrete strength grade reaches the requirements. S7. Standard section construction: In accordance with the formwork requirements for setting up connecting beams, pouring above-ground support piles, and pouring concrete slabs, the construction procedures of setting up, making steel bars, and pouring concrete shall be carried out. After the construction is completed, earthwork backfilling shall be carried out after the concrete strength grade reaches the requirements. S8. Repeat step S7 until the bottom elevation of the top cap beam is reached, and carry out the construction procedures of top cap beam formwork erection, steel bar fabrication, and concrete pouring. S9. Backfill soil to the bottom elevation of the connecting plate, and then carry out the reinforcement and concrete pouring work for the connecting plate.

5. The construction method of the lattice-type double-row pile-slab wall slope protection system according to claim 4, characterized in that, In step S1, during the site leveling process, the site is cleaned in the slope protection construction area, the slope is sloped as required, and leveling is carried out at both the top and bottom of the slope to ensure that the flatness and elevation meet the requirements.

6. The construction method of the lattice-type double-row pile-slab wall slope protection system according to claim 5, characterized in that, In step S2, the positioning method adopts the line-layout positioning, and the excavated holes are located in a row.

7. The construction method of the lattice-type double-row pile-slab wall slope protection system according to claim 5, characterized in that, The earthwork backfilling operation is carried out in layers and sections, with each layer being compacted and inspected until the backfill reaches the bottom of the upper pouring section.

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