A method for replacing an aqueduct in situ

Abstract

This invention belongs to the field of water conservancy engineering technology, specifically relating to a method for in-situ replacement of an aqueduct. The invention completes the in-situ replacement of the aqueduct through seven steps: safety assessment of the original aqueduct, temporary reinforcement of the risky aqueduct bridge pillars, permanent reinforcement of the aqueduct bridge abutments, construction of replacement aqueduct bridge pillars between adjacent risky aqueduct bridge pillars, prefabrication of the replacement aqueduct body and demolition of the risky aqueduct body, and installation of the replacement aqueduct body along with auxiliary installations such as waterstops and railings. By employing the technical solution of this invention, the replaced aqueduct shares the same axis as the original aqueduct. Therefore, during the demolition and reconstruction process, the existing aqueduct's operational time is maximized, minimizing losses.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology, specifically relating to a method for in-situ replacement of aqueducts. Background Technology

[0002] In existing technologies, irrigation districts all have irrigation aqueducts, but most of these aqueducts, after years of operation, have fallen into disrepair and pose significant safety risks. However, these aqueducts with significant safety risks remain in operation; dismantling them would not only disrupt normal irrigation and cause losses, but reconstruction would also present enormous difficulties. Summary of the Invention

[0003] This invention provides a method for in-situ replacement of an aqueduct, aiming to maximize the operating time of the existing aqueduct and minimize losses during the demolition and reconstruction of the aqueduct.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for in-situ replacement of an aqueduct includes the following steps.

[0006] Step 1: Conduct a safety assessment of the risk aqueduct body, risk aqueduct bridge pillars, and aqueduct bridge abutments. If the safety level of the aqueduct bridge abutments meets the preset requirements, proceed to Step 2.

[0007] Step 2: Temporary reinforcement of the aqueduct piers at risk;

[0008] Step 3: Permanent reinforcement of the aqueduct abutments;

[0009] Step 4: Construct replacement aqueduct piers between adjacent risky aqueduct piers;

[0010] Step 5: Prefabricate and replace the aqueduct bridge body;

[0011] Step Six: Dismantle the above-ground parts of the risky aqueduct body and the risky aqueduct bridge piers, and hoist and replace the aqueduct bridge body;

[0012] Step 7: Carry out the construction of waterstops and auxiliary railings.

[0013] Step two involves temporarily reinforcing the risky aqueduct piers using a steel-wrapping method.

[0014] The third step, the permanent reinforcement of the aqueduct abutment, is carried out using grouting.

[0015] The third step of the permanent reinforcement of the aqueduct abutment adopts the method of slope embankment and thickening.

[0016] The third step, the permanent reinforcement of the aqueduct abutment, adopts the method of slope embankment and grouting.

[0017] In step four, when constructing a replacement aqueduct bridge pillar between adjacent risky aqueduct bridge pillars, the axis of the risky aqueduct bridge pillar coincides with the axis of the replacement aqueduct bridge pillar.

[0018] The net distance between the replacement aqueduct bridge pier and the adjacent risky aqueduct bridge pier shall not be less than 2.5 times the diameter of the pile foundation.

[0019] In step six, the dismantling of the risky aqueduct body and the risky aqueduct bridge pillars, and the hoisting and replacement of the aqueduct bridge body are carried out in a segmented manner.

[0020] The auxiliary facilities in step seven include waterstops and railings.

[0021] Beneficial effects:

[0022] (1) This invention completes the in-situ replacement of the aqueduct through seven steps: safety assessment of the original aqueduct, temporary reinforcement of the risky aqueduct bridge pillars, permanent reinforcement of the aqueduct bridge abutments, construction of replacement aqueduct bridge pillars between adjacent risky aqueduct bridge pillars, prefabrication of the replacement aqueduct bridge body and demolition of the risky aqueduct body, and hoisting and installing the replacement aqueduct bridge body and auxiliary facilities such as waterstops and railings. This maximizes the operating time of the existing aqueduct and minimizes losses.

[0023] (2) When constructing replacement aqueduct bridge pillars between adjacent risk aqueduct bridge pillars, the axis of the risk aqueduct bridge pillar coincides with the axis of the replacement aqueduct bridge pillar, which can minimize the flow loss along the flow and maximize the benefits.

[0024] (3) When dismantling the risk aqueduct body and risk aqueduct bridge pillars and hoisting to replace the aqueduct bridge body, the present invention adopts a segmented construction method, which can not only hoist the current section of the aqueduct body at the same time, but also dismantle other sections of the aqueduct body at the same time, which can significantly shorten the installation cycle.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are 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.

[0027] Figure 1 This is a flowchart of the present invention.

[0028] Figure 2 This is a schematic diagram of the original aqueduct's longitudinal section.

[0029] Figure 3 A schematic diagram of the construction for replacing the aqueduct bridge piers.

[0030] Figure 4 A schematic diagram of the area behind the risky aqueduct to be dismantled.

[0031] Figure 5 A schematic diagram of the area behind the aqueduct bridge to be rebuilt and replaced.

[0032] In the diagram: 1. Risk aqueduct body; 2. Risk aqueduct bridge pillar; 3. Aqueduct bridge abutment; 4. Replacement aqueduct bridge pillar; 5. Replacement aqueduct bridge body. 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] according to Figures 1-5 The method for in-situ replacement of an aqueduct, as shown, includes the following steps:

[0036] Step 1: Conduct a safety assessment of the risk aqueduct body 1, risk aqueduct bridge pillar 2, and aqueduct bridge abutment 3. If the safety level of aqueduct bridge abutment 3 meets the preset requirements, proceed to Step 2.

[0037] Step 2: Temporary reinforcement work is carried out on the risky aqueduct pier 2;

[0038] Step 3: Permanent reinforcement of abutment 3 of the aqueduct;

[0039] Step 4: Construct replacement aqueduct bridge pier 4 between adjacent risky aqueduct bridge piers 2;

[0040] Step 5: Prefabricate and replace the aqueduct bridge body 5;

[0041] Step Six: Remove the above-ground portions of the risk aqueduct body 1 and risk aqueduct bridge pier 2, and hoist and replace the aqueduct bridge body 5;

[0042] Step 7: Carry out the construction of waterstops and auxiliary railings.

[0043] In practical use, a safety assessment must first be conducted on the risk aqueduct body 1, risk aqueduct bridge pillar 2, and aqueduct bridge abutment 3. The technical solution of this invention can only be adopted when the risk aqueduct body 1 and risk aqueduct bridge pillar 2 pose safety risks and need to be demolished, while the aqueduct bridge abutment 3 meets the requirements of good overall structure, high safety level, and sufficient bearing capacity to meet the bearing capacity conditions of the reconstructed aqueduct. This invention is not applicable to aqueduct bridge abutment 3 that needs to be demolished and rebuilt.

[0044] In practical applications, safety assessments primarily involve evaluating factors such as operational indicators failing to meet design standards and serious safety issues existing in the project. Conducting safety assessments of these factors provides support for the design of subsequent construction plans, ensuring both safety during construction and maximizing cost savings.

[0045] This invention solves the problem of operational impact on aqueducts that are already providing benefits during the demolition and reconstruction process, maximizing the operating time of existing aqueducts and effectively reducing losses.

[0046] Example 2:

[0047] according to Figures 1-5 The in-situ replacement construction method for the aqueduct shown differs from that in Embodiment 1 in that the temporary reinforcement of the risky aqueduct bridge column 2 in step two is carried out by wrapping steel.

[0048] In actual use, the risk aqueduct bridge column 2 was found to have safety risks after safety assessment, and it is necessary to temporarily reinforce it to avoid the impact of vibration on the construction pile foundation and to ensure the safety and smooth completion of subsequent construction.

[0049] This embodiment uses steel-wrapped reinforcement for temporary reinforcement, which can ensure the safety of subsequent construction and save costs.

[0050] Example 3:

[0051] according to Figures 1-5 The in-situ replacement construction method of the aqueduct shown differs from that of Embodiment 1 in that the permanent reinforcement of the aqueduct abutment 3 in step three is carried out by grouting.

[0052] Furthermore, in step three, the permanent reinforcement of abutment 3 of the aqueduct is carried out by the method of thickening the slope with soil.

[0053] Furthermore, in step three, the permanent reinforcement of the aqueduct abutment 3 is carried out by slope embankment thickening and grouting.

[0054] In actual use, after safety assessment, the aqueduct bridge abutment 3 that meets the safety level requirements can continue to be used and support the aqueduct body in subsequent reconstruction. For its longevity, it will be permanently reinforced.

[0055] In practical applications, the specific reinforcement method can be selected according to the needs. Grouting and slope reinforcement can be used individually or simultaneously.

[0056] Example 4:

[0057] according to Figures 1-5 The method for in-situ replacement of an aqueduct shown differs from that in Embodiment 1 in that: in step four, when constructing a replacement aqueduct bridge column 4 between adjacent risky aqueduct bridge columns 2, the axis of the risky aqueduct bridge column 2 coincides with the axis of the replacement aqueduct bridge column 4.

[0058] In practical use, replacing the aqueduct bridge pier 4 with this technical solution during construction can minimize the flow loss along the way and maximize benefits.

[0059] Example 5:

[0060] according to Figures 1-5 The in-situ replacement construction method of the aqueduct shown differs from that of Embodiment 1 or Embodiment 4 in that the net distance between the replaced aqueduct bridge column 4 and the adjacent risky aqueduct bridge column 2 is not less than 2.5 times the diameter of the pile foundation.

[0061] In actual use, the above-mentioned technical solution was adopted when replacing the aqueduct bridge pier 4. During the construction process, interference with the risky aqueduct bridge pier 2 was avoided, ensuring smooth and safe construction.

[0062] Example 6:

[0063] according to Figures 1-5 The method for in-situ replacement of an aqueduct shown differs from that in Embodiment 1 in that the removal of the risky aqueduct body 1 and the risky aqueduct bridge pier 2 in step six, and the hoisting and replacement of the aqueduct bridge body 5 are carried out in a segmented manner.

[0064] In practical use, segmented construction allows for the simultaneous hoisting of one section of the trench and the dismantling of other sections, which can significantly shorten the installation cycle.

[0065] Example 7:

[0066] like Figure 1-5 This is a specific application example of an in-situ replacement construction method for aqueducts.

[0067] Aqueduct abutment 3: The upstream abutment on one side of this example is located on bedrock and is a masonry structure. The overall structure is good and the safety level is high. After reinforcement, it can be used as a new aqueduct abutment. The downstream abutment on the other side of this example is located on soil foundation and is a pile foundation structure. The overall structure is good and the safety level is high. After reinforcement, it can be used as a new aqueduct abutment.

[0068] Replacement Aqueduct Column 4: It mainly consists of double pile foundations, abutments, single bridge columns and cap beams, forming a flat pole shape. The double pile foundations and abutments are made of C30 reinforced concrete, while the bridge columns and cap beams are made of C40 reinforced concrete.

[0069] Replacement of Aqueduct Body 5: In this example, a rectangular structure is adopted, the aqueduct body adopts a prestressed structure, and the body adopts a C50 reinforced concrete structure.

[0070] like Figure 3 Priority should be given to constructing replacement aqueduct bridge piers 4, ensuring they do not collide with the original aqueduct structure and guaranteeing the safety of the original aqueduct's water supply; at the same time, prefabricate replacement aqueduct bodies 5.

[0071] like Figure 4 After replacing the aqueduct bridge column 4 and prefabricating the replacement aqueduct body 5 to meet the design requirements, remove the risky aqueduct body 1 and the above-ground part of the risky aqueduct bridge column 2. At this time, waterless construction should be carried out.

[0072] like Figure 5 A crane was used to replace the aqueduct body 5. After installation, auxiliary work such as water sealing and railings was carried out.

[0073] The removal and replacement of the aqueduct body 1 was carried out in sections.

[0074] This invention avoids the impact on aqueducts that are already providing benefits during the demolition and reconstruction process, maximizes the operating time of existing aqueducts, and reduces losses.

[0075] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0076] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0077] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0078] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. An aqueduct in-situ replacement construction method, characterized by: Includes the following steps, Step 1: Conduct a safety evaluation of the risk aqueduct body (1), risk aqueduct bridge pillars (2) and aqueduct bridge abutments (3). If the safety level of the aqueduct bridge abutments (3) meets the preset requirements, proceed to Step 2. Step 2: Temporary reinforcement work is carried out on the risky aqueduct pier (2); Step 3: Permanent reinforcement of the aqueduct abutment (3); Step 4: Construct replacement aqueduct bridge pillars (4) between adjacent risky aqueduct bridge pillars (2); Step 5: Prefabricate and replace the aqueduct bridge body (5); Step 6: Remove the above-ground parts of the risk aqueduct body (1) and the risk aqueduct bridge pillar (2), and hoist and replace the aqueduct bridge body (5); Step 7: Construct auxiliary facilities; The temporary reinforcement of the risk aqueduct bridge pier (2) in step two is carried out by wrapping steel. In step six, the removal of the risk aqueduct body (1) and the risk aqueduct bridge pillar (2), and the hoisting and replacement of the aqueduct bridge body (5) are carried out in a segmented manner. When constructing a replacement aqueduct bridge column (4) between adjacent risk aqueduct bridge columns (2) in step four, the axis of the risk aqueduct bridge column (2) coincides with the axis of the replacement aqueduct bridge column (4); The net distance between the replacement aqueduct pier (4) and the adjacent risky aqueduct pier (2) shall not be less than 2.5 times the diameter of the pile foundation.

2. The method of claim 1, wherein: The third step of the permanent reinforcement of the aqueduct abutment (3) adopts the grouting method.

3. The method of claim 1, wherein: The third step of the permanent reinforcement of the aqueduct abutment (3) adopts the method of slope embankment thickening.

4. The in-situ replacement construction method for an aqueduct as described in claim 1, characterized in that: The third step of the permanent reinforcement construction of the aqueduct abutment (3) adopts the method of slope soil thickening and grouting.

5. The in-situ replacement construction method for an aqueduct as described in claim 1, characterized in that: The auxiliary facilities in step seven include waterstops and railings.

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