A construction method for reconstructing and expanding a ship lock in situ

Abstract

The present invention provides a construction method for reconstructing and expanding a ship lock in-situ. The flood control gate of the upper lock head section of the existing ship lock is used as a water retaining cofferdam during the construction period. In terms of the plane layout, starting from the target cutting surface located in the lock chamber section of the existing ship lock, the remaining part of the existing ship lock is cut downstream, and a new ship lock is constructed downstream. In terms of the cross-section layout, the bank side pier structure between the upper lock head section of the existing ship lock and the upper lock head section of the new ship lock is cut to a first preset elevation, a first water retaining and anti-seepage line and a second water retaining and anti-seepage line are added, and an anti-seepage spur wall is constructed. The upper navigation wall section of the existing ship lock and the upper lock head section of the existing ship lock are reconstructed, and a third water retaining and anti-seepage line is added. The original water retaining line building is used as the water retaining line during the construction period, and the permanent water retaining line of the hub is moved downstream to ensure that the normal operation of the existing hub is not affected during the construction period, skillfully avoiding the inertial thinking of the need to construct a large-scale earth-rock cofferdam project upstream for reconstructing the existing water retaining line building, ensuring the safety during the engineering reconstruction construction period, and greatly saving the project cost.

Description

Technical Field

[0001] The present invention relates to the technical field of ship lock engineering, and particularly relates to a construction method for reconstructing and expanding a ship lock at the original site. Background Technique

[0002] In recent years, in order to promote the development of inland waterway shipping, a large number of navigation and power hubs have been built in China to improve the waterway grade and the navigation conditions of the waterway. As a ship passage building, the ship lock is an important part of the navigation and power hub, and its scale directly affects inland waterway shipping. In recent years, with the frequent economic activities between regions, the shipping freight volume has increased rapidly, and the transport fleet has gradually become larger. The passing capacity of the existing ship locks can no longer meet the rapidly increasing traffic volume demand, increasing the waiting time of ships and affecting the normal transportation of waterway materials. Therefore, many ship locks are facing the problem of reconstruction and expansion. At present, it is common to expand a second-line ship lock beside the existing ship lock. However, expanding a second-line ship lock requires a large area of land and a lot of funds, and even seriously affects the traffic organization on both sides during the construction period. Therefore, it is often necessary to reconstruct on the basis of the existing ship lock, especially in the middle and upper reaches of the river valley area, where restricted by the topography and geomorphology, and for areas with less impact during the navigation interruption period, it is necessary to reconstruct and expand on the basis of the original ship lock.

[0003] In the prior art, for the reconstruction and expansion project of ship locks, the conventional solution is to completely abolish the existing ship lock, then re-excavate the foundation pit on the adjacent side, build a second-line ship lock, and use the backfill in the existing ship lock as the construction cofferdam during the construction period, and use earth-rock cofferdams at the upstream and downstream to close the foundation pit. However, restricted by the terrain, it is often impossible to arrange a second-line ship lock, or even if there is space, it is necessary to greatly increase the land acquisition area and increase the project investment.

[0004] In view of this, it is necessary to propose a construction method for reconstructing and expanding a ship lock at the original site to solve or at least alleviate the above defects. Summary of the Invention

[0005] The main purpose of the present invention is to provide a construction method for reconstructing and expanding a ship lock at the original site to solve the problem that in the prior art, for the reconstruction and expansion project of ship locks, the conventional solution is restricted by the terrain, often unable to arrange a second-line ship lock, or even if there is space, it is necessary to greatly increase the land acquisition area and increase the project investment.

[0006] To achieve the above purpose, the present invention provides a construction method for reconstructing and expanding a ship lock at the original site, including the steps:

[0007] S1, using the flood control gate of the upper lock head section of the existing ship lock as the water retaining cofferdam during the construction period, starting from the target cutting surface located in the lock chamber section of the existing ship lock, cutting off the remaining part of the existing ship lock downstream; wherein, the target cutting surface is at a preset distance from the flood control gate, and the target cutting surface is perpendicular to the extension direction of the existing ship lock;

[0008] S2. Starting from the target cutting surface, construct a new ship lock downstream; wherein, the upper lock head section of the new ship lock is connected to the target cutting surface, and the width of the lock gate of the new ship lock is greater than that of the existing ship lock.

[0009] S3. Cut the bank side pier structure between the upper lock head section of the existing ship lock and the upper lock head section of the new ship lock to a first preset elevation; wherein, the difference between the lowest navigable design water level of the existing ship lock and the first preset elevation meets the navigability requirements.

[0010] S4. Add a first water retaining and anti-seepage line and a second water retaining and anti-seepage line; wherein, the first water retaining and anti-seepage line corresponds to the upper lock head section of the existing ship lock, the second water retaining and anti-seepage line is located between the upper lock head section of the existing ship lock and the upper lock head section of the new ship lock, the upstream end of the first water retaining and anti-seepage line is connected to the original water retaining and anti-seepage line of the existing ship lock, and the upstream end of the second water retaining and anti-seepage line is connected to the downstream end of the first water retaining and anti-seepage line.

[0011] S5. Construct an anti-seepage stab wall at the position corresponding to the upper lock head section of the new ship lock, and then reconstruct the upper navigation wall section of the existing ship lock and the upper lock head section of the existing ship lock so that the navigable width of the existing ship lock matches the width of the lock gate of the new ship lock; wherein, the anti-seepage stab wall is inserted into the bank side soil body along the direction perpendicular to the water flow from the upper lock head section of the new ship lock.

[0012] S6. Add a third water retaining and anti-seepage line; wherein, the third water retaining and anti-seepage line corresponds to the upper lock head section of the new ship lock and the anti-seepage stab wall, and extends along the direction perpendicular to the water flow, the river side end of the third water retaining and anti-seepage line is connected to the downstream end of the second water retaining and anti-seepage line, and the bank side end of the third water retaining and anti-seepage line is located in the bank side soil body.

[0013] Preferably, between step S3 and step S4, there is also included a step:

[0014] S31. Strengthen the river side pier structure between the upper lock head section of the existing ship lock and the upper lock head section of the new ship lock.

[0015] Preferably, in step S31, "strengthen the river side pier structure between the upper lock head section of the existing ship lock and the upper lock head section of the new ship lock" specifically includes the following steps:

[0016] S311. Construct a strengthening side wall on the inner side of the river side pier structure; wherein, the bottom of the strengthening side wall is fixedly connected to the bottom plate of the lock chamber section of the existing ship lock by implanting anchor bars, and the side wall of the strengthening side wall is fixedly connected to the river side pier structure by implanting anchor bars; the second water retaining and anti-seepage line is arranged on the inner side of the strengthening side wall.

[0017] Preferably, after the step S311, the following steps are further included:

[0018] S312, implant prestressed anchor cables into the reinforced side wall; wherein, the prestressed anchor cables penetrate through the reinforced side wall from the top of the reinforced side wall downward and are fixedly connected to the bottom slab of the existing lock chamber section.

[0019] Preferably, in the step S4, "transforming the upper navigation wall section of the existing lock and the upper lock head section of the existing lock" specifically includes the following steps:

[0020] S41, sequentially cut off the shore-side partial structures of the upper lock head section of the existing lock and the upper navigation wall section of the existing lock upstream along the inner wall of the shore-side pier structure, so that the navigation width of the existing lock matches the width of the entrance of the new lock;

[0021] S42, cut off the river-side partial structure of the upper lock head section of the existing lock upstream along the inner wall of the river-side pier structure, so that the upper lock head section of the existing lock is connected to the reinforced side wall.

[0022] Preferably, between the steps S3 and S4, the following steps are further included:

[0023] S32, backfill the inner part between the shore-side pier structure and the river embankment with C20 concrete to the first preset elevation.

[0024] Preferably, the thickness of the reinforced side wall is set between 2.8 m and 3.2 m, and the reinforced side wall is 4 m - 6 m higher than the top of the river-side pier structure.

[0025] Preferably, after the step S3, the following steps are further included:

[0026] S6, implant steel bars on the top of the shore-side pier structure and then pour to the second preset elevation to level the top surface of the shore-side pier structure.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides a construction method for reconstructing and expanding a lock on the original site. The present invention provides a construction method for reconstructing and expanding a lock on the original site. Using the flood control gate of the upper lock head section of the existing lock as a water retaining cofferdam during the construction period, starting from the target cutting surface located in the existing lock chamber section, cutting off the remaining part of the existing lock downstream, and constructing a new lock downstream, cutting off the shore-side pier structure between the upper lock head section of the existing lock and the upper lock head section of the new lock to the first preset elevation, adding a first water retaining and anti-seepage line and a second water retaining and anti-seepage line and constructing an anti-seepage spur wall, then transforming the upper navigation wall section of the existing lock and the upper lock head section of the existing lock, and adding a third water retaining and anti-seepage line.

[0029] Without damaging the original water retaining line structure during the construction period, this application first constructs a new ship lock downstream as a new water retaining line structure, and makes full use of the existing lock wall structure. Innovatively, by cutting the side pier structure on the bank and adding the first, second, and third water retaining and anti-seepage lines, the water retaining line of the ship lock hub is lowered, ensuring that the normal operation of the existing hub is not affected during the construction period. Secondly, by first constructing a new water retaining line downstream, it cleverly avoids the inertial thinking of the need to construct a large-scale earth-rock cofferdam project upstream for the transformation of the existing water retaining line structure, ensuring the safety of the project transformation construction period and significantly saving the project cost at the same time. And by expanding and reconstructing on the basis of the original ship lock, there is no need for large-scale land acquisition on the side, which may be the only solution in canyon areas, effectively saving land and project investment. It should be noted that the solution provided by this application is applicable to all future technical solutions for the expansion and reconstruction of the original ship lock site, and provides a reference idea for the industry. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 It is a schematic flow chart in an embodiment of the present invention;

[0032] Figure 2 It is a schematic structural diagram of an existing ship lock in the prior art;

[0033] Figure 3 It is a schematic structural diagram after constructing a new ship lock in an embodiment of the present invention;

[0034] Figure 4 It is a schematic structural diagram after cutting the side pier structure on the bank in an embodiment of the present invention;

[0035] Figure 5 For Figure 4 It is a schematic cross-sectional view along the A-A direction in

[0036] Figure 6 For Figure 4 It is a schematic cross-sectional view along the B-B direction in

[0037] Figure 7 It is a schematic structural diagram after constructing the water retaining and anti-seepage line in an embodiment of the present invention;

[0038] Figure 8 For Figure 7 It is a schematic cross-sectional view along the A-A direction in

[0039] Figure 9 is Figure 7 a schematic cross-sectional view along the B-B direction in the middle;

[0040] Figure 10 is a schematic view of the overall structure after reconstruction and expansion in an embodiment of the present invention.

[0041] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

[0042] 10. Existing ship lock; 110. Existing upstream navigation wall section; 120. Existing upper lock head section of the ship lock; 130. Existing lock chamber section of the ship lock; 131. Bottom slab; 140. Existing lower lock head section of the ship lock; 150. Existing lower navigation wall section of the ship lock; 160. Reinforced side wall; 161. Anchor reinforcement; 162. Prestressed anchor cable; 170. River side pier structure; 180. Bank side pier structure; 20. Target cutting surface; 30. Newly built ship lock; 310. Newly built upper lock head section of the ship lock; 320. Anti-seepage spur wall; 40. Original water retaining and anti-seepage line; 420. First water retaining and anti-seepage line; 430. Second water retaining and anti-seepage line; 440. Third water retaining and anti-seepage line; 50. C20 concrete. Detailed implementation manners

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, the descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] Please refer to the attached Figure 1-10 , a construction method for reconstructing and expanding a ship lock on the original site provided by the present invention, includes the steps:

[0048] S1, using the flood control gate of the upper lock head section 120 of the existing ship lock as a water retaining cofferdam during construction, starting from the target cutting surface 20 located in the lock chamber section 130 of the existing ship lock, cutting off the remaining part of the existing ship lock 10 downstream; wherein, the target cutting surface 20 is at a preset distance from the flood control gate, and the target cutting surface 20 is perpendicular to the extension direction of the existing ship lock 10.

[0049] For the convenience of those skilled in the art to fully understand the technical solutions of the present application, some key terms are now explained. The existing ship lock 10 referred to in the present application refers to the previously constructed ship lock, which is also the main object to be reconstructed and expanded. The new ship lock 30 refers to the part of the ship lock newly built on the basis of the existing ship lock 10. For example, the existing ship lock 10 includes an upper navigation wall section, an upper lock head section, a lock chamber section, a lower lock head section, and a lower navigation wall section connected in sequence from upstream to downstream. The new ship lock 30 includes an upper lock head section, a lock chamber section, a lower lock head section, and a lower navigation wall section. After the existing ship lock 10 is reconstructed and expanded, it is equivalent to the upper navigation wall section of the new ship lock 30.

[0050] Specifically, when reconstructing and expanding the existing ship lock 10, the flood control gate of the upper lock head section 120 of the existing ship lock is fully utilized as a water retaining cofferdam during construction. During construction, the upper lock head flood control gate is closed to temporarily block the upstream water to ensure normal construction downstream, avoiding the inertial thinking of the conventional construction plan that requires constructing a large earth-rock cofferdam project upstream.

[0051] Among them, this application starts from the target cutting surface 20 located in the chamber section 130 of the existing ship lock, and cuts off the remaining part of the existing ship lock 10 downstream. It should be noted that the selection of the target cutting surface 20 is related to the number of levels of the existing ship lock 10 and actual needs, and the selection of the target cutting surface 20 cannot be too close to the upper lock head section 120 of the existing ship lock, otherwise it will have a great impact on the structure of the upper lock head section 120 of the existing ship lock. On the contrary, if it is too far from the upper lock head section 120 of the existing ship lock, the length of the subsequent newly built curtain key as the water retaining and anti-seepage line will be too long, resulting in engineering waste. In other words, the preset distance between the target cutting surface 20 and the flood control gate of the upper lock head needs to be constant, neither too large nor too small.

[0052] As a preferred example, taking the existing ship lock 10 as a two-level ship lock, the position of the target cutting surface 20 is located at the interface between the middle lock head and the second-level chamber section of the existing ship lock 10. During the actual cutting process, starting from the target cutting surface, the structural part of the existing ship lock 10 is cut off / removed downstream, that is, the second-level chamber section, the lower lock head, and the lower navigation wall section are sequentially cut off, so as to facilitate the construction of a newly built ship lock 30 with a larger shipping freight volume downstream of the target cutting surface 20.

[0053] Furthermore, the target cutting surface 20 can be perpendicular to the extension direction of the existing ship lock 10, or the target cutting surface 20 can be set to be appropriately inclined, as long as the upper lock head section 310 of the corresponding newly built ship lock is connected to the target cutting surface 20, it can be used as the target cutting surface 20 of this application.

[0054] S2. Starting from the target cutting surface 20, construct the newly built ship lock 30 downstream; among them, the upper lock head section 310 of the newly built ship lock is connected to the target cutting surface 20, and the mouth width of the newly built ship lock 30 is greater than the mouth width of the existing ship lock 10. It can be understood that this application aims to expand and renovate on the basis of the original site / the existing ship lock 10, so as to increase the shipping freight volume of the ship lock. When constructing the newly built ship lock 30 downstream starting from the target cutting surface 20, preferably, the extension direction of the newly built ship lock 30 can be set to be the same as the extension direction of the existing ship lock 10. It is easy to understand that the upper lock head section 310 of the newly built ship lock is connected to the target cutting surface 20, that is, the navigation channel of the upper lock head section 310 of the newly built ship lock is connected to the chamber section 130 of the existing ship lock. Among them, the mouth width of the newly built ship lock 30 is greater than the mouth width of the existing ship lock 10, that is, the shipping freight volume of the newly built ship lock 30 is greater than the shipping freight volume of the existing ship lock 10. In addition, the structural form of the newly built ship lock 30 can be set by those skilled in the art according to actual needs. For example, it can be a newly built single-level ship lock, or a two-level ship lock or a multi-level ship lock.

[0055] S3. Cut the bank side pier structure 180 between the upper lock head section 120 of the existing lock and the upper lock head section 310 of the new lock to the first preset elevation; wherein, the difference between the lowest navigable design water level of the existing lock 10 and the first preset elevation meets the navigability requirements.

[0056] It should be noted that by cutting the bank side pier structure 180 between the upper lock head section 120 of the existing lock and the upper lock head section 310 of the new lock, the navigable space of the existing lock 10 near the bank side is widened. It should be noted that in order to ensure normal navigation, the difference between the lowest navigable design water level of the existing lock 10 and the first preset elevation needs to meet the navigability requirements. Further, the river side pier structure 170 and the bank side pier structure 180 need to be described. The river side pier structure 170 / the bank side pier structure 180 includes, but is not limited to, the lock wall of the existing lock 10. As the name implies, the river side pier structure 170 is the side pier structure near the river side, and the bank side pier structure 180 is the side pier structure near the river embankment / river bank. In the embodiment of the present application, by cutting the bank side pier structure 180 and retaining the river side pier structure 170, the expansion between the upper lock head section 120 of the existing lock and the upper lock head section 310 of the new lock is realized.

[0057] S4. Add a first water retaining and anti-seepage line 420 and a second water retaining and anti-seepage line 430; wherein, the first water retaining and anti-seepage line 420 corresponds to the upper lock head section 120 of the existing lock, the second water retaining and anti-seepage line 430 is located between the upper lock head section 120 of the existing lock and the upper lock head section 310 of the new lock, the upstream end of the first water retaining and anti-seepage line 420 is connected to the original water retaining and anti-seepage line 40 of the existing lock 10, and the upstream end of the second water retaining and anti-seepage line 430 is connected to the downstream end of the first water retaining and anti-seepage line 420.

[0058] It can be understood by those skilled in the art that, in order to fully ensure the anti-seepage treatment after the expansion of the built ship lock 10, the embodiment of the present application adds a first water-retaining anti-seepage line 420 and a second water-retaining anti-seepage line 430, and the first water-retaining anti-seepage line 420 corresponds to the built ship lock upper lock first section 120, and the second water-retaining anti-seepage line corresponds to the built ship lock chamber section 130, so as to ensure the anti-seepage effect to the greatest extent. As a specific example, the first water-retaining anti-seepage line 420 and the second water-retaining anti-seepage line 430 can both adopt the form of curtain grouting, the first water-retaining anti-seepage line 420 is set at the position of the built ship lock upper lock first section 120, and extends along the extension direction of the built ship lock 10, and the second water-retaining anti-seepage line 430 is set between the built ship lock upper lock first section 120 and the newly built ship lock upper lock first section 310, and extends along the extension direction of the built ship lock 10. It is understandable to those skilled in the art that the water-retaining and anti-seepage line is located at the foundation and the part below the foundation, and the setting of the water-retaining and anti-seepage line corresponding to the ship lock structure can guarantee the water-retaining and anti-seepage effect to the greatest extent. In addition, it should also be noted that the water-retaining and anti-seepage line of the built ship lock 10 usually extends along the flood discharge gate along the vertical water flow direction, passes through the built ship lock upper lock first section 120 in sequence and extends to the inside of the river bank / bank. By adding the first water-retaining and anti-seepage line 420 and the second water-retaining and anti-seepage line 430, the present application can move the water-retaining and anti-seepage range of the original water-retaining and anti-seepage line 40 of the previously built ship lock 10 downward to the upstream position of the newly built ship lock 30, so as to ensure that the safety of the built hub is not affected during the construction period.

[0059] S5, constructing an anti-seepage thorn wall 320 at the position corresponding to the first section 310 of the newly built ship lock, and then transforming the navigation wall section of the existing ship lock 10 and the first section 120 of the existing ship lock, so that the navigation width of the existing ship lock 10 matches the gate width of the newly built ship lock 30; wherein the anti-seepage thorn wall 320 is inserted into the bank soil from the first section 310 of the newly built ship lock in a direction perpendicular to the water flow;

[0060] Those skilled in the art should note that the function of the anti-seepage thorn wall 320 is equivalent to the water retaining dam structure of the newly built ship lock 30. The anti-seepage thorn wall 320 extends from the bank side of the upper lock head section 310 of the newly built ship lock in the direction perpendicular to the water flow to the river embankment / mountain body. By building the anti-seepage thorn wall 320, the water above the riverbed can be blocked upstream of the newly built ship lock 30. In addition, combining the above content, in order to fully realize the reconstruction and expansion on the original site, this step continues to transform the upper navigation wall of the existing ship lock 10 and the upper lock head section 120 of the existing ship lock. For example, along the inner wall / outer wall of the cut-off bank side pier structure 180, part of the structure of the upper navigation wall of the existing ship lock 10 and the upper lock head section 120 of the existing ship lock are cut off upstream, so as to realize the expansion of the upper navigation wall and the upper lock head. It should be noted here that the existing ship lock 10 after reconstruction and expansion will serve as the "upper navigation wall" of the newly built ship lock 30. Therefore, at this time, the flood control gate of the upper lock head section 120 of the existing ship lock also needs to be removed to ensure the through passage of the entire waterway.

[0061] In addition, the construction sequence of the third water retaining and anti-seepage line 440 and the anti-seepage thorn wall 320 can be determined according to actual needs. The third water retaining and anti-seepage line 440 can be constructed before the anti-seepage thorn wall 320 is made, or the third water retaining and anti-seepage line 440 can be constructed after the anti-seepage thorn wall 320 is constructed.

[0062] S6. Add the third water retaining and anti-seepage line 440; wherein, the third water retaining and anti-seepage line 440 corresponds to the upper lock head section 310 of the newly built ship lock and the anti-seepage thorn wall 320, and extends in the direction perpendicular to the water flow. The river side end of the third water retaining and anti-seepage line 440 is connected to the downstream end of the second water retaining and anti-seepage line 430, and the bank side end of the third water retaining and anti-seepage line 440 is located in the bank side soil body.

[0063] Those skilled in the art can understand that, in order to construct a closed-loop anti-seepage and water retaining system and move the original water retaining and anti-seepage line 40 of the existing ship lock 10 to the newly built ship lock 30, this step adds the third water retaining and anti-seepage line 440 at the position of the upper lock head section 310 of the newly built ship lock and the anti-seepage thorn wall 320, so that the original water retaining and anti-seepage line of the existing ship lock 10, the first water retaining and anti-seepage line 420, the second water retaining and anti-seepage line 430 and the third water retaining and anti-seepage line 440 jointly form a new closed-loop water retaining and anti-seepage line, jointly undertaking the water retaining, waterproofing and anti-seepage line of the newly built ship lock 30, so as to reduce the seepage flow rate and lower the seepage pressure, thereby ensuring the anti-seepage requirements of the newly built ship lock 30. As a preferred example, the third water retaining and anti-seepage line can adopt the form of curtain grouting. The specific construction method of curtain grouting is well-known technical content to those skilled in the art and will not be elaborated here.

[0064] In addition, it should also be noted that since the third water retaining and anti-seepage line 440 extends in the direction perpendicular to the water flow, the third water retaining and anti-seepage line 440 includes a relatively arranged river side end and a bank side end.

[0065] In the solution of this application, during the construction period, without damaging the original water retaining line buildings, a new ship lock 30 is first constructed downstream as a new water retaining line building, and the existing lock wall structure is fully utilized. Innovatively, by cutting the bank side pier structure 180 and adding a first water retaining and anti-seepage line 420, a second water retaining and anti-seepage line 430, and a third water retaining and anti-seepage line 440, the water retaining line of the ship lock hub is lowered, ensuring that the normal operation of the existing hub is not affected during the construction period. Secondly, by first constructing a new water retaining line downstream, the inertial thinking of the need to construct a large-scale earth-rock cofferdam project upstream for reconstructing the existing water retaining line buildings is skillfully avoided, which can ensure the safety of the project reconstruction construction period and at the same time greatly save the project cost. And the reconstruction and expansion are carried out on the basis of the original ship lock, without the need for large-scale land acquisition on the side, which may be the only solution in the canyon area, effectively saving land and project investment.

[0066] As a preferred embodiment of the present invention, between steps S3 and S4, there is also a step:

[0067] S31, reinforce the river side pier structure 170 between the upper lock head section 120 of the existing ship lock and the upper lock head section 310 of the new ship lock. Those skilled in the art should understand that in the reconstruction and expansion of the ship lock at the original site, the stress condition of the lock wall structure of the existing ship lock chamber section 130 has changed. Before the transformation, it only bears the reciprocating water retaining during the operation period and does not retain water in most cases. However, after the reconstruction, the lock wall of the existing ship lock chamber section 130 is used as a permanent water retaining structure, and it is necessary to reinforce the river side pier structure 170 between the upper lock head section 120 of the existing ship lock and the upper lock head section 310 of the new ship lock. Among them, the reinforcement method can be set by those skilled in the art according to actual needs. As a better example, the reinforcement method can be as follows:

[0068] S311, construct a reinforced side wall 160 on the inner side of the river side pier structure 170; wherein, the bottom of the reinforced side wall 160 is fixedly connected to the bottom plate 131 of the existing ship lock chamber section 130 by implanting anchor bars 161, and the side wall of the reinforced side wall 160 is fixedly connected to the river side pier structure 170 by implanting anchor bars 161; the second water retaining and anti-seepage line 430 is arranged on the inner side of the reinforced side wall 160.

[0069] It should be noted that the inner side of the above-mentioned river side pier structure 170 refers to the side of the river side pier structure 170 close to the bank side pier structure 180, that is, the side wall located in the waterway. By constructing a reinforced side wall 160 on the inner side of the river side pier structure 170 and using it as an integral structure with the river side pier structure 170 to serve as the permanent water retaining structure after reconstruction, the structural strength of the river side pier structure 170 of the existing ship lock 10 can be greatly enhanced.

[0070] Further, after the step S311, the following steps are further included:

[0071] S312, implant prestressed anchor cables 162 into the reinforced side wall 160; wherein, the prestressed anchor cables 162 penetrate through the reinforced side wall 160 from the top of the reinforced side wall 160 downward and are fixedly connected to the bottom plate 131 of the existing lock chamber section 130. In order to further improve the structural strength and integrity, the embodiment of the present invention also implants prestressed anchor cables 162 into the reinforced side wall 160, thereby firmly connecting the reinforced side wall 160 to the river side pier structure 170 of the existing lock 10 and the bottom plate 131 of the lock chamber section. For details, please refer to the attached Figure 8 and 9 .

[0072] As a preferred embodiment of the present invention, the step of "transforming the upper navigation wall section on the existing lock 10 and the upper lock head section 120 on the existing lock" in the step S4 specifically includes the following steps:

[0073] S41, sequentially cut off the river side partial structures of the upper lock head section 120 on the existing lock and the upper navigation wall section on the existing lock 10 along the inner wall of the bank side pier structure 180 upstream, so that the navigation width of the existing lock 10 matches the mouth width of the new lock 30;

[0074] S42, cut off the river side partial structure of the upper lock head section 120 on the existing lock along the inner wall of the river side pier structure 170 upstream, so that the upper lock head section 120 on the existing lock is connected to the reinforced side wall 160.

[0075] Please refer to Figure 5 and Figure 8 again. In the step S41, the specifically cut-off part is mainly the partial structures of the upper navigation wall near the bank side and the upper lock head near the bank side of the existing lock 10, so that the bank sides of the upper navigation wall and the upper lock head of the existing lock 10 match the bank side pier structure 180.

[0076] In addition, the specifically cut-off part in the step S42 is mainly the partial structures of the upper navigation wall and the upper lock head near the river side. On the contrary, if this step is not processed, passing ships will bump into the side of the reinforced side wall 160.

[0077] As a preferred embodiment, between the steps S3 and S4, the following step is further included:

[0078] S32, backfill the inner part between the bank side pier structure 180 and the river embankment with C20 concrete 50 to the first preset elevation.

[0079] It should be noted that the internal backfill between the bank side pier structure 180 of the existing ship lock 10 and the river embankment is mainly cobblestones and earth and rock. Before the reconstruction and expansion, most of the time, there was no river water immersion and scouring. After the reconstruction and expansion, this part of the internal backfill area will be used as a reservoir area / water storage area, and the river water will submerge this part. Based on this, in this embodiment, C20 concrete is used for replacement filling to reduce the damage of the water flow to the river embankment and improve the overall structural strength.

[0080] As a preferred example, the thickness of the reinforced side wall 160 is set between 2.8 m and 3.2 m, and the reinforced side wall 160 is 4 m - 6 m higher than the top of the river side pier structure 170. It can be understood that the thickness of the reinforced side wall 160 and the height difference between the reinforced side wall 160 and the river side pier structure 170 can also be set by those skilled in the art according to actual needs. Among them, the thickness of the reinforced wall refers to the dimension in the direction perpendicular to the water flow.

[0081] Further, after the step S3, the following steps are further included:

[0082] S6, after planting steel bars on the top of the bank side pier structure 180, pouring to the second preset elevation to level the top surface of the bank side pier structure 180. Those skilled in the art can understand that after cutting the bank side pier structure 180 between the upper lock head section 120 of the existing ship lock and the upper lock head section 310 of the new ship lock to the first preset elevation, at this time, the top of the bank side pier structure 180 is uneven. At this time, by planting steel bars and pouring to the second preset elevation, the top surface of the bank side pier structure 180 is leveled. Among them, as a specific example, the height difference between the second preset elevation and the first preset elevation is set at 0.5 m.

[0083] The above is only the preferred embodiment of the present invention, and does not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A construction method for reconstructing and expanding a ship lock in-situ, characterized in that, Including the steps: S1. Use the flood control gate of the upper lock head section of the existing lock as the water retaining cofferdam during the construction period, and start from the target cutting surface located in the lock chamber section of the existing lock, and cut off the remaining part of the existing lock downstream; wherein, the target cutting surface is at a preset distance from the flood control gate, and the target cutting surface is perpendicular to the extension direction of the existing lock; S2. Starting from the target cutting surface, construct a new lock downstream; wherein, the upper lock head section of the new lock is connected to the target cutting surface, and the width of the lock head of the new lock is greater than the width of the lock head of the existing lock; S3. Cut off the bank side pier structure between the upper lock head section of the existing lock and the upper lock head section of the new lock to the first preset elevation; wherein, the difference between the lowest navigable design water level of the existing lock and the first preset elevation meets the navigability requirements; S4. Add a first water retaining and anti-seepage line and a second water retaining and anti-seepage line; wherein, the first water retaining and anti-seepage line corresponds to the upper lock head section of the existing lock, the second water retaining and anti-seepage line is located between the upper lock head section of the existing lock and the upper lock head section of the new lock, the upstream end of the first water retaining and anti-seepage line is connected to the original water retaining and anti-seepage line of the existing lock, and the upstream end of the second water retaining and anti-seepage line is connected to the downstream end of the first water retaining and anti-seepage line; S5. Construct an anti-seepage thorn wall at the position corresponding to the upper lock head section of the new lock, and then transform the upper navigation wall section and the upper lock head section of the existing lock so that the navigable width of the existing lock matches the width of the lock head of the new lock; wherein, the anti-seepage thorn wall is inserted into the bank side soil body along the direction perpendicular to the water flow from the upper lock head section of the new lock; S6. Add a third water retaining and anti-seepage line; wherein, the third water retaining and anti-seepage line corresponds to the upper lock head section of the new lock and the anti-seepage thorn wall, and extends along the direction perpendicular to the water flow, the river side end of the third water retaining and anti-seepage line is connected to the downstream end of the second water retaining and anti-seepage line, and the bank side end of the third water retaining and anti-seepage line is located in the bank side soil body.

2. The construction method for reconstructing and expanding a ship lock in-situ according to claim 1, characterized in that, Between step S3 and step S4, there is also included a step: S31. Strengthen the river side pier structure between the upper lock head section of the existing lock and the upper lock head section of the new lock.

3. The construction method for reconstructing and expanding a ship lock in-situ according to claim 2, characterized in that, In step S31, "strengthen the river side pier structure between the upper lock head section of the existing lock and the upper lock head section of the new lock" specifically includes the following steps: S311. Construct a strengthening side wall on the inner side of the river side pier structure; wherein, the bottom of the strengthening side wall is fixedly connected to the bottom plate of the lock chamber section of the existing lock by implanting anchor bars, and the side wall of the strengthening side wall is fixedly connected to the river side pier structure by implanting anchor bars; the second water retaining and anti-seepage line is arranged on the inner side of the strengthening side wall.

4. The construction method for reconstructing and expanding a ship lock in-situ according to claim 3, characterized in that, After step S311, there is also included a step: S312. Implant prestressed anchor cables into the strengthening side wall; wherein, the prestressed anchor cables penetrate through the strengthening side wall from the top of the strengthening side wall and are fixedly connected to the bottom plate of the lock chamber section of the existing lock.

5. The construction method for reconstructing and expanding a ship lock in-situ according to claim 3, characterized in that, In step S4, "transform the upper navigation wall section and the upper lock head section of the existing lock" specifically includes the following steps: S41. Sequentially cut off the shore-side partial structures of the upper lock head section and the upper navigation wall section of the existing lock from the inner wall of the shore-side pier structure upstream, so that the navigation width of the existing lock matches the width of the gate opening of the new lock. S42. Cut off the river-side partial structure of the upper lock head section of the existing lock from the inner wall of the river-side pier structure upstream, so that the upper lock head section of the existing lock is connected to the reinforced side wall.

6. The construction method for reconstructing and expanding a ship lock in-situ according to claim 1, characterized in that, Between steps S3 and S4, there is also a step: S32. Backfill the inner part between the shore-side pier structure and the river embankment with C20 concrete to the first preset elevation.

7. The construction method for reconstructing and expanding a ship lock in-situ according to claim 3, characterized in that, The thickness of the reinforced side wall is set between 2.8 m and 3.2 m, and the reinforced side wall is 4 m to 6 m higher than the top of the river-side pier structure.

8. The construction method for reconstructing and expanding a ship lock in-situ according to claim 1, characterized in that, After step S3, there is also a step: S6. After planting steel bars on the top of the shore-side pier structure, pour it to the second preset elevation to level the top surface of the shore-side pier structure.

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