A method for correcting and repositioning deformation of riverbank and waterway revetment walls

Abstract

This invention relates to the field of riverbank and waterway deformation repair technology, specifically a method for correcting and repositioning deformed riverbank and waterway revetment walls. The method includes the following steps: investigating the tilting and deformation state of the revetment walls; based on the investigation results, if the horizontal displacement of the revetment walls does not exceed 50cm, designing a specific pressure-bearing, bladder-type expanded-body anchor cable reaction force correction and repositioning construction scheme, considering the revetment wall structure (retaining wall or pile wall) type; and, according to the correction design scheme, drilling holes near the top of the revetment wall (at the upper 1 / 3 of the retaining wall or the 1 / 2 of the pile cap beam) and constructing pressure-bearing, bladder-type expanded-body anchor cables. This invention can promptly solve the deformation and failure problem of riverbank and waterway revetments. By applying tension through anchor cables, the tilted waterway wall is repositioned. Then, the soft soil layer inside the wall is excavated and removed, followed by soil backfilling. The construction cycle is short, the cost is low, and it is safe, reliable, highly applicable, and has great application prospects.

Description

Technical Field

[0001] This invention relates to the field of riverbank and waterway deformation repair technology, specifically to a method for correcting and resetting deformed riverbank and waterway walls. Background Technology

[0002] With the construction and development of various inland river sluices, pumping stations, dams, and other water conservancy projects, the original upstream and downstream water flow patterns and velocities have changed. Under various inducing conditions, the original waterway revetments may undergo certain changes, such as outward tilting and deformation or downward slippage, posing a serious threat to the safe operation of the waterway. If the revetments are not corrected and restored in time, excessive tilting can lead to the breakage of the revetment piles, severely affecting the safe operation of the waterway and causing significant economic losses. Therefore, when tilting or deformation occurs in the revetments, correction and restoration should be carried out promptly.

[0003] Currently, the main approach to addressing the deformation of riverbank and waterway revetment walls is in-situ reinforcement or reconstruction. When in-situ reinforcement is adopted, one method is to use cast-in-place piles, which involves directly reinforcing the revetment walls with bored piles on the bank side. However, the drilling process causes significant disturbance to the revetment walls, posing substantial safety hazards during construction. Another method, micropile reinforcement, is relatively novel and convenient to implement, but its ability to correct deviations is poor. Furthermore, reinforcement through reconstruction requires redesign and construction according to new specifications, necessitating large-scale excavation to considerable depth, resulting in a long construction period and high costs.

[0004] Therefore, in order to solve the above problems, a method for correcting and resetting deformation of riverbank and waterway revetment walls is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method for correcting and resetting deformation of riverbank and waterway revetment walls, in order to solve the problems mentioned in the background art. For example, the existing method of reinforcing revetment walls by grouting piles causes significant disturbance to the revetment walls during drilling operations, posing a significant safety hazard during construction. Another method, micropile reinforcement, is relatively novel and convenient to construct, but its correction capability is poor. In addition, reinforcement by reconstruction requires redesign and construction according to new specifications, which requires large-scale excavation with a large excavation depth, and also results in long construction periods and high costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for correcting and resetting deformation of a riverbank or waterway revetment wall, the method comprising the following steps:

[0007] S1: Investigate the tilting and deformation state of the revetment wall of the dike and waterway;

[0008] S2: Based on the survey results, if the deviation of the revetment wall from the horizontal displacement does not exceed 50cm, a specific pressure-bearing bladder-type expanded anchor cable reaction force correction and repositioning construction scheme shall be designed in combination with the type of revetment wall structure (retaining wall or pile).

[0009] S3: According to the correction design scheme, drill holes and install pressure-bearing bladder-type expanded anchor cables near the top of the revetment wall (1 / 3 above the retaining wall or 1 / 2 of the pile cap beam). The angle between the anchor cable and the horizontal plane is 25° to 35°. Install reaction frames made of I-beams / channel steel at the anchoring end of the anchor cable on the outside of the retaining wall.

[0010] S4: Install synchronous jacks at the anchoring end of the anchor cable for prestress monitoring, and set up surface displacement monitoring points at the top of the retaining wall or capping beam for monitoring.

[0011] S5: Use spiral drilling or high-pressure jet grouting to remove / soften the original soil on the inner side of the revetment wall;

[0012] S6: Synchronous jacks are used to apply anchor cable prestress in coordination to correct the deviation of the revetment wall. After the surface displacement monitoring point observes the recovery of the corrected displacement, the anchor is locked.

[0013] S7: After the correction is completed, backfill soil at the location where the channel revetment wall was hollowed out.

[0014] Preferably, this correction and repositioning method is applicable to retaining walls (mortar-grouted masonry walls, buttress-type retaining walls and gravity retaining walls), pile banks (drilled piles, sheet piles, precast piles, steel sheet piles) and other revetment walls, but is not limited to these.

[0015] Preferably, during construction, the angle between the pressure-bearing reaction anchor cable and the horizontal is 25° to 35°, and the characteristic value of the reaction force provided by the anchor cable is 25kN to 30kN. It should be noted that when performing correction and resetting, it is not limited to using pressure-bearing bladder-type expanded anchor cables, and other types of anchor cables or anchor rods can also be used.

[0016] Preferably, a reaction frame made of I-beams / channel steel is installed at the anchoring end of the anchor cable on the outside of the retaining wall to increase the force-bearing area of ​​the anchoring end of the anchor cable. It should be noted that the reaction frame installed at the anchoring end of the anchor cable on the outside of the retaining wall is not limited to I-beams or channel steel.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This method for correcting and resetting deformation of riverbank and waterway revetment walls can promptly solve the problem of deformation failure of riverbank and waterway revetment walls. By applying tension through anchor cables, the tilted waterway revetment wall is reset. Then, the soft soil layer inside the revetment wall is excavated and removed before backfilling. The construction cycle is short and the cost is low. It is also safe, reliable, highly applicable, and has great application prospects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the steps involved in the method of correcting and resetting deformation of river embankment and waterway revetment walls;

[0020] Figure 2 These are the front and top views of the inclined deformation of the steel sheet pile riverbank revetment and the excavation of the original soil on the inner side of the revetment.

[0021] Figure 3 These are the front and top views of the steel sheet pile riverbank revetment wall correction and repositioning and the enlarged head anchor cable reinforcement;

[0022] Figure 4 These are the front and top views of the inclined deformation of the riverbank and waterway revetment wall made of masonry blocks and the excavation of the original soil on the inner side of the wall.

[0023] Figure 5 These are the front and top views of the masonry riprap wall riverbank and waterway revetment bank wall correction, repositioning, and enlarged head anchor cable reinforcement.

[0024] Figure 6 These are the front and top views of the buttress retaining wall riverbank and waterway revetment wall tilting deformation and the excavation of the original soil on the inner side of the wall.

[0025] Figure 7 These are the main view and top view of the buttress retaining wall, riverbank and waterway revetment, with the inner bottom slab diluted by jet grouting.

[0026] Figure 8 This is the main view of the buttress-type retaining wall riverbank and waterway revetment bank wall correction and repositioning and enlarged head anchor cable reinforcement;

[0027] Figure 9 These are the front and top views of the gravity retaining wall riverbank and waterway revetment wall tilting deformation and the excavation of the original soil on the inner side of the wall.

[0028] Figure 10 These are the front and top views of gravity retaining wall riverbank and waterway revetment bank wall correction, repositioning, and enlarged head anchor cable reinforcement.

[0029] Figure 11 This is a schematic diagram of the reinforcement of riverbank and waterway revetment with steel pipe piles using gravity retaining walls.

[0030] Figure 12 These are the front and top views of gravity retaining wall riverbank and waterway revetment bank wall correction, repositioning and reinforcement.

[0031] Figure 13 These are the front and top views of the inclined deformation of the sheet pile riverbank revetment and the excavation of the original soil on the inner side of the revetment.

[0032] Figure 14These are the front and top views of the sheet pile riverbank and waterway revetment wall correction and repositioning and the enlarged head anchor cable reinforcement. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] like Figure 1 and Figure 2 The method for correcting and repositioning a steel sheet pile riverbank / navigation channel revetment wall, as shown, includes the following steps:

[0036] S1: Investigate the tilting and deformation state of the revetment wall of the steel sheet pile dike for the waterway;

[0037] S2: Implementation plan for the construction of enlarged head anchor cable correction and repositioning based on the survey results;

[0038] S3: Excavate the accumulated soil on the inner side of the steel sheet pile channel bank wall of the river embankment;

[0039] S4: Install anchor cables to correct and restore the deformation of the steel sheet pile channel revetment wall. Specifically, apply tension through the anchor cables to restore the tilted channel revetment wall.

[0040] S5: After the steel sheet pile channel revetment is restored, backfill soil is carried out at the location where the channel revetment wall was hollowed out.

[0041] Example 2:

[0042] like Figure 3 , Figure 4 The method for correcting and repositioning a masonry riprap wall for a waterway revetment, as shown, includes the following steps:

[0043] S1: Investigate the tilting and deformation state of the revetment wall of the steel sheet pile dike for the waterway;

[0044] S2: Design an implementation plan for the enlarged head anchor cable correction and repositioning construction based on the survey results;

[0045] S3: Excavate the accumulated soil on the inner side of the steel sheet pile channel bank wall of the river embankment;

[0046] S4: Install anchor cables to correct and restore the deformation of the steel sheet pile channel revetment wall. Specifically, apply tension through the anchor cables to restore the tilted channel revetment wall.

[0047] S5: After the steel sheet pile channel revetment is restored, backfill soil is carried out at the location where the channel revetment wall was hollowed out.

[0048] Example 3:

[0049] like Figure 5 , Figure 6 and Figure 7 The method for correcting and repositioning a buttress-type concrete retaining wall riverbank or waterway revetment, as shown, includes the following steps:

[0050] S1: Investigate the tilting and deformation state of the buttress-type concrete retaining wall embankment revetment for the waterway.

[0051] S2: Design a construction plan for correcting and resetting the enlarged head anchor cable based on the survey results;

[0052] S3: Excavate the accumulated soil on the inner side of the riverbank and channel revetment wall, install enlarged anchor cables and apply prestress on the buttress-type concrete retaining wall and channel revetment wall.

[0053] S4: High-pressure jet water jet is used to dilute the soil under the inner bottom plate of the buttress retaining wall, providing conditions for the buttress retaining wall to be corrected and reset.

[0054] S5: The inclined buttress concrete retaining wall channel revetment is reset by continuing to apply tension to the anchor cables;

[0055] S6: Backfill soil at the location where the inner side of the channel revetment wall has been excavated.

[0056] Example 4:

[0057] like Figure 8 , Figure 9 , Figure 10 and Figure 11 The method for correcting and repositioning a gravity concrete retaining wall riverbank or waterway revetment includes the following steps:

[0058] S1: Investigate the tilting and deformation state of the gravity concrete retaining wall for waterway revetment.

[0059] S2: Based on the survey results, design an implementation plan for the enlarged head anchor cable correction and repositioning construction, as well as a construction plan for steel pipe pile reinforcement.

[0060] S3: Excavate the accumulated soil inside the gravity concrete retaining wall of the waterway bank, and then install anchor cables to correct and restore the deformation of the gravity concrete retaining wall. Specifically, the anchor cables are used to apply tension to restore the tilted waterway bank.

[0061] S4: After the gravity retaining wall is corrected and repositioned by anchoring, steel pipe piles are driven in the middle of the gravity retaining wall and filled with crushed stone and cement to further reinforce the gravity retaining wall.

[0062] S5: Backfill soil at the location where the inner side of the gravity retaining wall has been excavated.

[0063] Example 5:

[0064] like Figure 12 , Figure 13 The method for correcting and repositioning a slab-shaped concrete retaining wall for riverbank and waterway revetment, as shown, includes the following steps:

[0065] S1: Investigate the tilting and deformation state of the revetment wall of the steel sheet pile dike for the waterway;

[0066] S2: Implementation plan for the construction of enlarged head anchor cable correction and repositioning based on the survey results;

[0067] S3: Excavate the accumulated soil on the inner side of the steel sheet pile channel bank wall of the river embankment, and remove / soften the original soil on the inner side of the bank wall by using spiral drilling or high-pressure jet grouting.

[0068] S4: Install anchor cables to correct and restore the deformation of the steel sheet pile channel revetment wall. Specifically, apply tension through the anchor cables to restore the tilted channel revetment wall.

[0069] S5: After the steel sheet pile channel revetment is restored, backfill soil is carried out at the location where the channel revetment wall was hollowed out.

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for correcting and repositioning deformation of riverbank and waterway revetment walls, characterized in that, The correction and reset method includes the following steps: S1: Investigate the tilting and deformation state of the revetment wall of the dike and waterway; S2: Based on the survey results of S1, if the deviation of the revetment wall from the horizontal displacement does not exceed 50cm, a specific pressure-bearing bladder-type expanded anchor cable reaction force correction and repositioning construction scheme shall be designed in combination with the structural type of the channel revetment wall. The channel revetment wall structure is a retaining wall or a row of piles. S3: According to the correction design scheme, drill holes and construct pressure-bearing bladder-type expanded anchor cables at the top 1 / 3 of the revetment wall or the top 1 / 2 of the pile cap beam. Install reaction frames made of I-beams / channel steel at the anchoring end of the anchor cables on the outside of the retaining wall. S4: Install synchronous jacks at the anchoring end of the anchor cable for prestress monitoring, and set up surface displacement monitoring points at the top of the retaining wall or cap beam for monitoring; use high-pressure jet water jet to dilute the soil under the bottom plate on the inner side of the buttress retaining wall revetment, so as to provide conditions for the buttress retaining wall to correct and reposition itself. S5: Use spiral drilling or high-pressure jet grouting to remove / soften the original soil on the inner side of the revetment wall; S6: Synchronous jacks are used to apply anchor cable prestress in coordination to correct the deviation of the revetment wall. After the surface displacement monitoring point observes the recovery of the corrected displacement, the anchor is locked. S7: After the correction is completed, backfill soil at the location where the channel revetment wall was hollowed out; The aforementioned correction and repositioning method is applicable to revetment walls such as retaining walls and pile banks; the retaining walls include masonry walls, buttress retaining walls, and gravity retaining walls, but are not limited to these; the pile banks include bored piles, sheet piles, precast piles, and steel sheet piles, but are not limited to these. During construction, the angle between the pressure-bearing reaction anchor cable and the horizontal is 25° to 35°, and the characteristic value of the reaction force provided by the anchor cable is 25kN to 30kN. It should be noted that when performing correction and resetting, it is not limited to using pressure-bearing bladder-type expanded anchor cables, but other types of anchor cables or anchor rods can also be used. A reaction frame made of I-beams / channel steel is installed at the anchoring end of the anchor cable on the outside of the retaining wall to increase the force-bearing area of ​​the anchoring end. It should be noted that the reaction frame installed at the anchoring end of the anchor cable on the outside of the retaining wall is not limited to I-beams or channel steel.

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