Pier plate structure type arranged in combination with navigation piers
By reserve beam grooves on the navigation pier and erecting rectangular prefabricated beams, the navigation pier and pier plate are poured separately, the construction period and safety hazards caused by the synchronous pouring of the navigation pier and pier plate are solved, and efficient concrete construction and flow rate are achieved Control reduces the impact of power station flood discharge on navigation.
Patent Information
- Application Number
- CN202421088090.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-17
AI Technical Summary
In the design of navigation buildings, the bottom support structure needs to be erected and removed when the navigation pier and pier plate are poured simultaneously, resulting in a long construction period and high safety hazards, especially when the power station is flooded, the flow rate of the pilot channel entrance door area is too large during flood discharge. .
The pier plate structure type is adopted in combination with navigation pier layout, including the first navigation pier, the second navigation pier and the rectangular prefabricated beam. By reserving beam grooves on the navigation pier and erecting rectangular prefabricated beams in the beam grooves, a rectangular support structure is formed. , pour cast-in-place concrete in each warehouse to form an integral pier structure, the navigation pier and pier plate are poured separately, and the erection and demolition process of the bottom support structure are omitted.
It greatly saves construction period, improves concrete construction efficiency, reduces construction safety hazards, and effectively solves the problem of excessive horizontal flow rate in the pilot channel entrance area during flood discharge of power stations.
Smart Images
Figure CN222275430U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering, and in particular relates to a pier plate structure type combined with navigation pier layout. Background Art
[0002] In the design of navigation structures, in order to ensure smooth passage and mooring of the fleet, it is necessary to reasonably determine the layout of the pilot channel and the structural type of the navigation structure to avoid adverse flow conditions in the pilot channel.
[0003] At present, the piers of large-span and high-height navigation buildings are often cast synchronously with the navigation piers as the main structure, and steel formwork and full-floor scaffolding or Bailey bridges are required as bottom supports. This construction method has the following problems: when the navigation piers and piers are cast synchronously, the bottom support structure needs to be erected and dismantled, which takes a long construction period, reduces the efficiency of concrete construction, and has a high safety hazard. Utility Model Content
[0004] In view of the defects existing in the prior art, the utility model provides a pier plate structure type combined with the navigation pier layout, which can effectively solve the above problems.
[0005] The technical solution adopted by the utility model is as follows:
[0006] The utility model provides a pier plate structure type combined with navigation pier layout, comprising a first navigation pier (1), a second navigation pier (2) and a rectangular prefabricated beam (3);
[0007] The first navigation pier (1) and the second navigation pier (2) are arranged along the river; a first beam groove (4) is provided on the downstream side of the top of the first navigation pier (1), and a second beam groove (5) is provided on the upstream side of the top of the second navigation pier (2); the upstream end of the rectangular prefabricated beam (3) is arranged in the first beam groove (4), and the downstream end of the rectangular prefabricated beam (3) is arranged in the second beam groove (5).
[0008] Preferably, the rectangular precast beam (3) forms a rectangular support structure; concrete is cast in situ on the top of the rectangular precast beam (3) to form a pier structure (8).
[0009] Preferably, the bottom elevation of the pier structure (8) is lower than the lowest navigable water level, the top elevation is not lower than the highest navigable water level, the middle thickness B1 = 1m, and the top width B2 = 2 to 3m.
[0010] Preferably, water-permeable holes (9) for smoothing water flow are embedded in the side wall of the pier structure (8), and the spacing between the water-permeable holes (9) is 2m to 4m.
[0011] Preferably, the first beam groove (4) and the second beam groove (5) have the same size, a depth of 1 m along the river, and a width 4 cm wider than the pier structure (8) across the river, and the gaps are filled with elastic material.
[0012] Preferably, the rectangular prefabricated beam (3) has a rectangular cross-section, a height that is 1 / 8 to 1 / 12 times the net distance between the first navigation pier (1) and the second navigation pier (2), a width of 1 meter, and a span that is 2 to 3 meters longer than the net distance between the first navigation pier (1) and the second navigation pier (2).
[0013] Preferably, one side beam end of the rectangular precast beam (3) is laid in the first beam groove (4) with a laying length of 1m to 1.5m; the other side beam end of the rectangular precast beam (3) is laid in the second beam groove (5) with a laying length of 1m to 1.5m.
[0014] Preferably, a first flat steel plate (6) is pre-buried at the bottom of the beam end of the rectangular prefabricated beam (3); a second flat steel plate (7) is pre-buried in both the first beam groove (4) and the second beam groove (5); and the first flat steel plate (6) is placed on top of the second flat steel plate (7).
[0015] The utility model provides a pier plate structure combined with navigation pier layout, which has the following advantages:
[0016] The utility model provides a pier plate structure type combined with the navigation pier. The navigation pier and the pier plate are cast separately, which can omit the erection and removal process of the bottom support structure, greatly save the construction period, improve the efficiency of concrete construction, and reduce construction safety hazards. The thin-belly pier plate arranged between the navigation pier spans effectively solves the problem of excessive lateral flow velocity in the navigation channel gate area when the power station discharges flood water. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is an elevation view of the pier plate structure type combined with the navigation pier provided by the utility model;
[0018] Figure 2 for Figure 1 Section along AA;
[0019] Figure 3 for Figure 1 Section along BB;
[0020] Figure 4 for Figure 3 Section along CC.
[0021] Among them: 1 first navigation pier; 2 second navigation pier; 3 rectangular prefabricated beam; 4 first beam groove; 5 second beam groove; 6 first plane steel plate; 7 second plane steel plate; 8 pier plate structure; 9 water permeable hole. DETAILED DESCRIPTION
[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0023] The utility model relates to a pier plate structure type combined with the navigation pier. The technical problems to be solved by the utility model are mainly the difficulty of the overall cast-in-place construction of the large-span, large-height, thin-belly pier plate and the excessive flow velocity of the water flow in the entrance area of the navigation building when the power station discharges flood water. The technical solution to this problem is: arranging pier plates in combination with the navigation pier span of the navigation channel, so as to divide the riverbed into a dynamic water area and a static water area, thereby reducing the impact of the water flow on the entrance area; at the same time, the large-span, large-height, thin-belly pier plate adopts the method of "reserved beam groove + prefabricated rectangular beam + cast-in-place concrete", the navigation pier reserves a beam groove, the navigation pier and the pier plate are cast asynchronously, the bottom rectangular prefabricated beam is both a part of the pier plate structure and can also take into account the load-bearing formwork, and then the top of the rectangular prefabricated beam is cast-in-place concrete, and finally an integral pier plate structure is formed, which can effectively shorten the construction period and reduce safety hazards. The utility model is suitable for water conservancy and hydropower projects and water transportation projects.
[0024] The utility model provides a pier plate structure type combined with the navigation pier. The navigation pier and the pier plate are cast separately, which can omit the erection and removal process of the bottom support structure, greatly save the construction period, improve the efficiency of concrete construction, and reduce construction safety hazards. The thin-belly pier plate arranged between the navigation pier spans effectively solves the problem of excessive lateral flow velocity in the navigation channel gate area when the power station discharges flood water.
[0025] See also Figures 1 to 4 The utility model provides a pier plate structure type combined with the navigation pier layout, including a first navigation pier 1, a second navigation pier 2 and a rectangular prefabricated beam 3;
[0026] The first navigation pier 1 and the second navigation pier 2 are arranged along the river; a first beam groove 4 is provided at the downstream side of the top of the first navigation pier 1, and a second beam groove 5 is provided at the upstream side of the top of the second navigation pier 2; the upstream end of the rectangular precast beam 3 is laid in the first beam groove 4, and the downstream end of the rectangular precast beam 3 is laid in the second beam groove 5. The rectangular precast beam 3 forms a rectangular support structure; concrete is cast on the top of the rectangular precast beam 3 to form a pier plate structure 8.
[0027] As a specific structure, the bottom elevation of the pier plate structure 8 is lower than the lowest navigable water level, the top elevation is not lower than the highest navigable water level, the middle thickness B1 = 1m, the top width B2 = 2-3m, and the specific size is determined according to the maintenance conditions. The side wall of the pier plate structure 8 is buried with water holes 9 for smooth water flow, and the spacing between the water holes 9 is 2m-4m.
[0028] The first beam groove 4 and the second beam groove 5 have the same size, with a depth of 1 m along the river and a width 4 cm wider than the pier structure 8 across the river, and elastic material is filled in the gaps.
[0029] The rectangular prefabricated beam 3 has a rectangular cross section, a height of 1 / 8 to 1 / 12 times the net distance between the first navigation pier 1 and the second navigation pier 2, a width of 1 m, and a span of 2 m to 3 m longer than the net distance between the first navigation pier 1 and the second navigation pier 2.
[0030] One side beam end of the rectangular precast beam 3 is laid in the first beam groove 4 with a laying length of 1m to 1.5m; the other side beam end of the rectangular precast beam 3 is laid in the second beam groove 5 with a laying length of 1m to 1.5m.
[0031] A first planar steel plate 6 is pre-buried at the bottom of the beam end of the rectangular prefabricated beam 3 ; a second planar steel plate 7 is pre-buried in both the first beam groove 4 and the second beam groove 5 ; and the first planar steel plate 6 is placed on top of the second planar steel plate 7 .
[0032] The utility model also provides a construction method of a ship lift navigation pier structure, comprising the following steps:
[0033] Step 1: According to the clear span between the first navigation pier 1 and the second navigation pier 2, determine the structural parameters of the rectangular prefabricated beam 3, including the cross-sectional height and width, and the beam span;
[0034] Step 2: Precast the rectangular precast beam 3 by:
[0035] The steel bars are tied inside, and the top of the precast beam is exposed to 40 times the diameter of the vertical steel bars. The top lugs and bottom flat steel plates are embedded in advance. The buried position of the lugs is determined according to the positive bending moment of the beam being equal to the negative bending moment. After the warehouse is prepared, the concrete is poured. After a period of time after the pouring, the mold is removed, and then the top of the precast beam is roughened with a roughening gun, and maintained for a period of time.
[0036] Step 4: Start the hoisting work of the rectangular precast beam 3. Both sides of the beam end of the rectangular precast beam 3 are respectively erected in the first beam groove 4 and the second beam groove 5, and the erection length is 1m to 1.5m.
[0037] Step 5: Pour in-situ concrete on the top of the rectangular precast beam 3, and control the pouring layer thickness to 1.5m to 3m. After each bin of concrete pouring is completed and reaches a certain strength, pour the next bin of concrete until it is poured to the designed shape to form a pier structure 8.
[0038] Therefore, the pier-slab structure type combined with the layout of the navigation pier provided by the utility model adopts the scheme of "pre-reserved beam grooves for gate piers + prefabricated rectangular beams + cast-in-place concrete". The navigation pier has reserved beam grooves, and the navigation pier and the pier plate are not cast synchronously. The ends of the rectangular prefabricated beams are erected in the beam grooves reserved for the navigation pier. After the rectangular concrete formwork is formed at the bottom, the top is cast in-place concrete to finally form an integral pier plate. At present, large-span and large-height thin-bellied structures are often cast synchronously with the main structure, and steel formworks and full-floor scaffolding or Bailey bridges are used as bottom supports. This construction method greatly restricts the construction progress. The utility model provides a pier-slab structure type combined with the layout of the navigation pier. The navigation pier and the pier plate are cast separately, which can omit the erection and dismantling processes of the bottom support structure of the beam, greatly save construction time, and reduce construction safety hazards.
[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0040] In a large hydropower station project, the main hub buildings are composed of a concrete dam and a riverbed-type plant building, in which the single-hole gate hole of the dam also serves as a ship lift channel. The ship lift channel is composed of the upstream navigation pier, upstream rack, gate hole, downstream rack, and downstream navigation pier from upstream. When the flood gate discharges flood water, the flow state in the upstream ship lift entrance area is turbulent, which greatly affects the navigation of ships and does not meet the requirements of the specifications. In order to reduce the impact of the flood gate on navigable ships, the navigation pier plate of the navigation structure of the utility model is used at the entrance of the ship lift gate hole. The plane size of the navigation pier is 7m×7m, and the maximum clear spacing is 23m. The navigation pier plates described in the utility model are arranged between the piers. The thickness of the middle part of the navigation pier plate is 1m, the height is 9m, and the width of the top is increased to 2m for easy maintenance. The diameter of the water-permeable holes arranged in plum blossoms on the pier body is The spacing between rows is 4m×4m. Adding the pier plate described in the utility model can effectively reduce the lateral flow velocity in the entrance area and meet the requirements of the specifications. At the same time, in order to improve construction efficiency and safety, for large-span and high-height thin-bellied navigation pier plates, the construction method of "reserved beam groove + prefabricated rectangular beam + cast-in-place concrete" described in the utility model, the cross-sectional size of the prefabricated beam is B1×H1=1m×3m (width×height), the maximum length is 25.4m, and the top cast-in-place concrete is poured in three bins, and the height of each bin is 1.5m, 2.5m, and 2.0m respectively. The use of this solution reduces the linear construction period by 3 months.
[0041] The practice of the project shows that the structural type described in the utility model not only meets the requirements of structural safety and normal use function, but also has a simple structure and good economy, and has a good reference role in the related design of other similar projects.
[0042] The utility model provides a pier plate structure type combined with the arrangement of navigation piers. For large-span, large-height, thin-bellied pier plates, a construction method of "pre-reserved beam grooves + prefabricated rectangular beams + cast-in-place concrete" is adopted. The navigation piers reserve beam grooves in advance so that they do not need to be cast synchronously with the navigation pier plates, and the ends of adjacent prefabricated concrete beams are erected in the reserved beam grooves of the navigation pier plates. The rectangular prefabricated beams are used as construction templates and then cast-in-place concrete is cast on the top to finally form an integral navigation pier plate structure. The arrangement of thin-bellied pier plates between the spans of the navigation piers effectively solves the problem of excessive lateral flow velocity in the pilot channel gate area when the power station discharges flood water. The utility model effectively reduces the flow velocity in the pilot channel gate area while improving the pier plate construction efficiency, improving the concrete construction efficiency, shortening the construction period, and reducing safety hazards.
[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.
Claims
1. A pier plate structure combined with navigation pier layout, characterized in that: It comprises a first navigation pier (1), a second navigation pier (2) and a rectangular prefabricated beam (3); The first navigation pier (1) and the second navigation pier (2) are arranged along the river; a first beam groove (4) is provided on the downstream side of the top of the first navigation pier (1), and a second beam groove (5) is provided on the upstream side of the top of the second navigation pier (2); the upstream end of the rectangular prefabricated beam (3) is arranged in the first beam groove (4), and the downstream end of the rectangular prefabricated beam (3) is arranged in the second beam groove (5).
2. The pier plate structure type combined with the navigation pier layout according to claim 1 is characterized in that: The rectangular prefabricated beams (3) form a rectangular supporting structure; concrete is poured on top of the rectangular prefabricated beams (3) to form a pier structure (8).
3. The pier plate structure type combined with the navigation pier layout according to claim 2 is characterized in that: The bottom elevation of the pier structure (8) is lower than the lowest navigable water level, the top elevation is not lower than the highest navigable water level, the middle thickness B1 = 1m, and the top width B2 = 2-3m.
4. The pier plate structure type combined with the navigation pier layout according to claim 2 is characterized in that: Water holes (9) for stabilizing water flow are buried in the side wall of the pier structure (8), and the spacing between the water holes (9) is 2m to 4m.
5. The pier plate structure type combined with the navigation pier layout according to claim 2 is characterized in that: The first beam groove (4) and the second beam groove (5) have the same size, a depth of 1m along the river, and a width 4cm wider than the pier structure (8) across the river, and the gaps are filled with elastic material.
6. The pier plate structure type combined with the navigation pier layout according to claim 1 is characterized in that: The rectangular prefabricated beam (3) has a rectangular cross-section, a height that is 1 / 8 to 1 / 12 times the net distance between the first navigation pier (1) and the second navigation pier (2), a width of 1 meter, and a span that is 2 to 3 meters longer than the net distance between the first navigation pier (1) and the second navigation pier (2).
7. The pier plate structure type combined with the navigation pier layout according to claim 1 is characterized in that: One side beam end of the rectangular prefabricated beam (3) is laid in the first beam groove (4) with a laying length of 1m to 1.5m; the other side beam end of the rectangular prefabricated beam (3) is laid in the second beam groove (5) with a laying length of 1m to 1.5m.
8. The pier plate structure type combined with the navigation pier layout according to claim 1 is characterized in that: A first flat steel plate (6) is pre-buried at the bottom of the beam end of the rectangular prefabricated beam (3); a second flat steel plate (7) is pre-buried in both the first beam groove (4) and the second beam groove (5); and the first flat steel plate (6) is placed on top of the second flat steel plate (7).