Long-period reconstruction construction method for flood discharge gate

Abstract

The long-period reconstruction construction method is suitable for the situation that a new lock chamber adjacent to an old lock chamber is built on the rear side of the old lock chamber and comprises the steps that firstly, before the first flood season arrives, part of a bottom plate of the old lock chamber is dismantled to form a working groove, and a drainage ditch is excavated; thirdly, a new lock chamber is poured, and a water stop piece, a supporting piece and an anchor rod are arranged; then, secondary concrete pouring is conducted on the outer side of the supporting piece of the working groove, and a temporary flood fighting structure is formed; and (2) after safe flood fighting in the first flood season, the temporary flood fighting structure except the water stop piece and the remaining bottom plate of the old lock chamber are dismantled, the supporting piece and the anchor rod are cut off from the upstream face of the new lock chamber, then steel bars are bound, a new bottom plate of the old lock chamber is poured, and construction is completed. The flood control, waterproof and structural stability problems in the long-period construction process are considered, construction is convenient, the cost is low, a new thought is provided for flood discharge gate reconstruction, and the method is worthy of being popularized in the industry.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy project construction, and in particular to a long-term reconstruction construction method for a flood discharge gate. Background Art

[0002] When reinforcing the flood discharge gate, considering factors such as construction progress and flood safety, you can choose to demolish and rebuild on the original site and build a new gate chamber behind the old gate. If you choose to build a new gate chamber behind the old gate, it is inevitable to involve issues such as the connection between the new and old gate chambers and the arrangement of water stops. There are generally two solutions to this problem in the existing technology: 1) reserve a gap in the new gate chamber and set up the water stop after the old gate chamber is demolished; 2) groove the bottom plate of the old gate chamber in advance and install the water stop in advance. The former requires reserving a gap in the new gate chamber, which affects the overall steel bar arrangement of the gate chamber; the latter affects the steel bar arrangement of the bottom plate after the old gate chamber is demolished. In addition, since the construction volume of the new gate chamber and the energy dissipation pool is too large to be completed in a non-flood season, the reservoir faces the risk of flooding during the flood season. During this period, it is necessary to ensure the effective connection of the water stop. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a long-term reconstruction construction method for a flood discharge gate, which can specifically adopt the following technical solutions: The long-term reconstruction construction method of the flood discharge gate of the present invention is suitable for the case where a new gate chamber adjacent to the old gate chamber is built behind the old gate chamber, and comprises the following steps: The first step is to remove part of the bottom plate at the end of the old lock chamber to form a working groove before the first flood season arrives, and to dig a drainage ditch at the bottom of the working groove; then, cast the new lock chamber, and set up water stoppers, support members and anchor rods, wherein one end of the water stopper is buried in the bottom plate of the new lock chamber, and the other end is suspended in the working groove; the support member is covered and connected to the outside of the water stopper in the working groove, the bottom of the support member is set above the drainage ditch, and the top of the support member extends and is buried in the bottom plate of the new lock chamber; the anchor rod is set on the outside of the support member to connect the new lock chamber, the old lock chamber and the support member; then, a secondary concrete pouring is carried out on the outside of the support member of the working groove to form a temporary flood-proof structure; The second step is to remove the temporary flood control structure except the water stop parts and the remaining bottom plate of the old chamber after safely passing the first flood season. The support parts and anchor rods are cut off from the upstream surface of the new chamber. After that, the new bottom plate steel bars of the old chamber are tied and the new bottom plate of the old chamber is cast to complete the construction.

[0004] The water stop is arranged in the middle of the working groove, and comprises a first water stop and a second water stop arranged below the first water stop.

[0005] The first waterstop is made of copper, and the second waterstop is made of rubber.

[0006] The central axis of the drainage ditch is arranged in the same direction as the extension direction of the water stop member, and the drainage ditch is located outside the projection of the water stop member.

[0007] The support member is a U-shaped structural member composed of a cover plate, a vertical plate and a support plate connected in sequence. The cover plate is arranged above the drainage ditch and is provided with a water leakage hole. The free end of the support plate extends and is buried in the concrete of the new gate chamber.

[0008] The anchor rod includes a first anchor rod and a second anchor rod. The first anchor rod is an L-shaped structure, one end of which is welded to the vertical plate, and the other end extends into the concrete of the old lock chamber; the second anchor rod is arranged above the support plate, and its ends are respectively extended into the concrete of the old lock chamber and the concrete of the new lock chamber, and are welded in the middle.

[0009] The outer side of the water stop is wrapped with a geomembrane and a geotextile.

[0010] A closed-cell foam board is provided at the junction of the new and old gate chamber bottom plates above the first water stop, and the top surface of the closed-cell foam board is sealed with a sealant.

[0011] The long-term reconstruction construction method of the flood discharge gate provided by the present invention, without dismantling the old gate chamber, chooses to complete the pouring of the new gate chamber before the first flood season, during the pouring of the new gate chamber, pre-buries water stop parts, and sets a temporary flood control structure between the new and old gate chambers, so as to ensure that the new and old gate chambers flow normally in the first flood season and meet the flood discharge requirements, and then dismantle the above-mentioned temporary flood control structure, and re-cast the old gate chamber bottom plate, and at the same time construct the water stop structure between the new and old gate chambers to ensure the structural safety and waterproof performance of the flood discharge gate. The present invention takes into account the flood control, waterproof and structural stability issues in the long-term construction process, is easy to construct and low in cost, provides a new idea for the reconstruction of the flood discharge gate, and is worthy of promotion in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of excavating a working trench and installing a water stop member in the present invention.

[0013] Figure 2 It is a structural schematic diagram of the temporary flood control structure in the present invention.

[0014] Figure 3 yes Figure 2 Schematic diagram of the structure of the bottom cover plate part of the middle support member.

[0015] Figure 4 It is a structural schematic diagram of the bottom plate portion after the construction of the new and old lock chambers in the present invention is completed. DETAILED DESCRIPTION

[0016] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific construction process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0017] like Figure 1-4 As shown, the long-term reconstruction construction method of the flood discharge gate of the present invention is suitable for building a new gate chamber 2 adjacent to the old gate chamber 1 at the rear side thereof, and comprises the following steps: The first step is to remove part of the bottom plate at the end of the old lock chamber 1 to form a working groove 3 before the first flood season arrives, and to dig a drainage ditch 4 at the bottom of the working groove 3; then, cast the new lock chamber 2, and set water stoppers (including a first water stopper 5 and a second water stopper 6), support members 7 and anchor rods (including a first anchor rod 8 and a second anchor rod 9), wherein one end of the water stopper is buried in the bottom plate of the new lock chamber 2, and the other end is suspended in the working groove 3; the support member 7 is connected to the outside of the water stopper in the working groove 3, the bottom of the support member 7 is arranged above the drainage ditch 4, and the top of the support member 7 is extended and buried in the bottom plate of the new lock chamber 2; the anchor rod is arranged on the outside of the support member 7 to connect the new lock chamber, the old lock chamber and the support member 7; then, secondary concrete 10 is cast on the outside of the support member 7 of the working groove 3 to form a temporary flood-proof structure.

[0018] Specifically, the bottom plate surfaces of the old lock chamber 1 and the new lock chamber 2 should maintain the same height. The working groove 3 is located at the junction of the new and old lock chambers, and its size is 1×1.5m (width×height). The first water stop 5 and the second water stop 6 are arranged at intervals. The first water stop 5 is on the top, using copper water stop, and is 0.7m away from the top surface of the working groove 3; the second water stop 6 is on the bottom, using rubber water stop, and is 0.3m away from the bottom surface of the working groove 3. The first water stop 5 and the second water stop 6 are located at the joint between the new lock chamber 2 and the old lock chamber 1, and one end of each is buried in the concrete of the new lock chamber 2, and the other end is suspended in the working groove 3. The drainage ditch 4 is used for drainage of the lock chamber, and its cross-sectional size is 0.1×0.1m (width×height), and the central axis is arranged in the same direction as the extension direction of the water stop. The drainage ditch 4 is located in the middle of the bottom of the working groove 3 and outside the projection of the water stop.

[0019] The support member 7 is a U-shaped structural member formed by bending a steel plate, which plays a supporting role and also serves as a template. Specifically, the support member 7 includes a cover plate, a vertical plate and a support plate connected in sequence. The cover plate is at the bottom and the support plate is at the top. The width of the cover plate is 0.3m, and it is connected to the top of the drainage ditch 4 and has multiple leakage holes 11 evenly spaced at intervals of 1m. The support plate is parallel to the cover plate, and its free end extends horizontally to the right and is buried in the concrete of the new gate chamber 2 for at least 0.3m.

[0020] The anchor rods are used to improve the stability of the temporary flood control structure. The first anchor rod 8 is an L-shaped structure, one end of which is welded to the vertical plate of the support member 7, and the other end extends into the concrete of the old lock chamber 1; the second anchor rod 9 is set above the support plate of the support member 7, and is divided into two sections. The left end of the left section is extended and set in the concrete of the old lock chamber 1, and the right end of the right end is extended and set in the concrete of the new lock chamber 2, and the right end of the left section is welded and connected to the left end of the right end. The above-mentioned first anchor rod 8 and second anchor rod 9 are both set horizontally, and multiple anchor rods are set from top to bottom, and the length buried in the concrete of the new and old lock chambers is at least 0.5m.

[0021] The secondary concrete 10 is connected to the bottom plate of the new lock chamber 2, leaving only a construction joint and no expansion joint.

[0022] For the first water stop 5 and the second water stop 6, protective measures such as wrapping with a layer of geomembrane and a layer of 400g / ㎡ geotextile are required.

[0023] The second step is to remove the temporary flood control structure except the water stop (including the first water stop 5 and the second water stop 6) and the remaining bottom plate of the old lock chamber 1 after safely passing the first flood season, wherein the support 7 and the second anchor rod 9 are cut off from the upstream surface of the new lock chamber 2; thereafter, tie the new bottom plate steel bars of the old lock chamber 1, and cast the new bottom plate of the old lock chamber 1; at the same time, install the closed-cell foam board 12 at the junction of the new and old lock chamber bottom plates above the first water stop 5, and use the sealant 13 to seal the top surface of the closed-cell foam board 12 to complete the construction.

[0024] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A long-term reconstruction construction method for a flood discharge gate, suitable for building a new gate chamber adjacent to the rear side of an old gate chamber, characterized in that: The steps include: The first step is to remove part of the bottom plate at the end of the old lock chamber to form a working groove before the first flood season arrives, and to dig a drainage ditch at the bottom of the working groove; then, cast the new lock chamber, and set up water stoppers, support members and anchor rods, wherein one end of the water stopper is buried in the bottom plate of the new lock chamber, and the other end is suspended in the working groove; the support member is covered and connected to the outside of the water stopper in the working groove, the bottom of the support member is set above the drainage ditch, and the top of the support member extends and is buried in the bottom plate of the new lock chamber; the anchor rod is set on the outside of the support member to connect the new lock chamber, the old lock chamber and the support member; then, a secondary concrete pouring is carried out on the outside of the support member of the working groove to form a temporary flood-proof structure; The second step is to remove the temporary flood control structure except the water stop parts and the remaining bottom plate of the old chamber after safely passing the first flood season. The support parts and anchor rods are cut off from the upstream surface of the new chamber. After that, the new bottom plate steel bars of the old chamber are tied and the new bottom plate of the old chamber is cast to complete the construction.

2. The long-term reconstruction construction method of a flood discharge gate according to claim 1 is characterized in that: The water stop is arranged in the middle of the working groove, and comprises a first water stop and a second water stop arranged below the first water stop.

3. The long-term reconstruction construction method of a flood discharge gate according to claim 2 is characterized in that: The first waterstop is made of copper, and the second waterstop is made of rubber.

4. The long-term reconstruction construction method of a flood discharge gate according to claim 1 is characterized in that: The central axis of the drainage ditch is arranged in the same direction as the extension direction of the water stop member, and the drainage ditch is located outside the projection of the water stop member.

5. The long-term reconstruction construction method of a flood discharge gate according to claim 4 is characterized in that: The support member is a U-shaped structural member composed of a cover plate, a vertical plate and a support plate connected in sequence. The cover plate is arranged above the drainage ditch and is provided with a water leakage hole. The free end of the support plate extends and is buried in the concrete of the new gate chamber.

6. The long-term reconstruction construction method of a flood discharge gate according to claim 5 is characterized in that: The anchor rod includes a first anchor rod and a second anchor rod. The first anchor rod is an L-shaped structure, one end of which is welded to the vertical plate, and the other end extends into the concrete of the old lock chamber; the second anchor rod is arranged above the support plate, and its ends are respectively extended into the concrete of the old lock chamber and the concrete of the new lock chamber, and are welded in the middle.

7. The long-term reconstruction construction method of a flood discharge gate according to claim 1 is characterized in that: The outer side of the water stop is wrapped with a geomembrane and a geotextile.

8. The long-term reconstruction construction method of a flood discharge gate according to claim 2 is characterized in that: A closed-cell foam board is provided at the junction of the new and old gate chamber bottom plates above the first water stop, and the top surface of the closed-cell foam board is sealed with a sealant.

Images