External rail-mounted light-duty pollution-blocking float end structure and construction method

Abstract

The invention relates to an external steel rail type light trash-blocking float end structure and a construction method. The trash-blocking float end structure comprises tower body concrete, a trash-blocking float sliding structure, upper structure concrete, tower side backfill concrete and external steel rails. The tower side backfill concrete is used as the lower concrete of the trash-blocking float end structure, which reduces the pouring amount of concrete, saves the independent construction period of the trash-blocking float end structure, and can share the same construction platform with the tower body concrete pouring, thereby reducing the construction cost; the upper structure concrete is arranged on the side surface of the tower body concrete and the upper part of the tower side backfill concrete, thereby avoiding the influence of excavation and blasting on the structure and construction period of the water intake tower concrete construction, as well as the high cost of independently setting up a construction platform; the use of external steel rails solves the problems of great difficulty in construction of traditional built-in guide grooves, long construction period, high construction cost, and difficulty in maintenance, thereby reducing the construction difficulty and project cost.

Description

Technical Field

[0001] The invention relates to the technical field of water diversion for water conservancy and hydropower engineering, and in particular to an external steel rail type light-duty trash-blocking float end structure and a construction method. Background Art

[0002] In water conservancy and hydropower projects, the trash float, as a water diversion structure, occupies a very important position. In particular, the end structure of the trash float in a diversion type hydropower station has a controlling influence on the overall construction period and cost of the power station.

[0003] The construction of the end structure of a traditional high-slope trash-blocking float requires slope excavation and support, and excavation blasting can easily have a certain impact on the water intake tower structure and its construction period. The end structure of a traditional trash-blocking float is generally arranged vertically. After the excavation is completed, an independent construction platform needs to be set up to backfill a large amount of concrete along the hillside. This method has high construction measures and concrete pouring costs, and a long construction period, which can easily cause delays in the power generation schedule. The end structure of the trash-blocking float in some projects is set as an inclined surface to reduce the volume of backfill concrete. This method puts forward high requirements on the design of the articulated structure of the pontoon at the end of the trash-blocking float. In engineering applications, the pontoon at the end of the trash-blocking float is often stuck due to excessive resistance, which is not very practical. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an external rail-type light-duty trash-blocking float end structure and a construction method, which is suitable for the concrete structure design of the trash-blocking float end of the water inlet under complex conditions, has a short construction period, and is convenient for construction and maintenance.

[0005] The technical solution adopted by the present invention is: an external steel rail type light-duty trash-blocking float end structure, including a tower body concrete and a trash-blocking float sliding structure, characterized in that it also includes upper structure concrete, tower side backfill concrete and external steel rails,

[0006] The upper structure concrete and the tower side backfill concrete are both arranged on the side of the tower body concrete, the upper structure concrete is located on the upper part of the tower side backfill concrete, and the tower upper structure concrete is anchored to the tower body concrete and the tower side backfill concrete;

[0007] The tower side backfill concrete and the upper structure concrete water-facing surface are provided with steel anchor plates, and rail brackets are fixed on the steel anchor plates. External rails are fixed on the rail brackets. The external rails are arranged on the tower side backfill concrete and the upper structure concrete facades. The trash-blocking float sliding structure is connected to the external rails by nested sliding.

[0008] Preferably, the upper structure concrete is anchored to the tower body concrete and the tower side backfill concrete by inserting reinforcement bars.

[0009] Preferably, the rail support and the steel anchor plate, and the external rail and the rail support are fixed by welding.

[0010] Preferably, the external rail is assembled from multiple sections of standard hollow round steel.

[0011] Furthermore, each standard section of rail is fixed to at least two rail supports by welding.

[0012] Furthermore, the head and tail rail supports are fully wrapped with the corresponding rail sections by welding, and the middle rail supports are welded with the corresponding rail sections by 1 / 4 to 1 / 3 arc welding.

[0013] Preferably, the steel anchor plate is arranged at the position of the pollution-blocking and drifting guide groove on the backfill concrete of the tower side and the water-facing surface of the upper structure concrete.

[0014] A construction method for an external rail-mounted light-duty pollution-blocking float end structure comprises the following steps:

[0015] a. After the tower side backfill concrete is poured to the design elevation, the upper structure concrete is poured on the tower body concrete side and the upper part of the tower side backfill concrete. When pouring the upper structure concrete, the tower body concrete side and the upper surface of the tower side backfill concrete need to be roughened and pre-embedded with dowel bars to anchor the upper structure concrete;

[0016] b. The upper structure concrete is designed and constructed according to the "gravity dam" shape, with a basic triangular section and the upstream surface designed as a vertical section;

[0017] c. During the construction of the tower side backfill concrete and upper structure concrete, a steel anchor plate is pre-buried at the designed position of the sewage drift guide channel on the water-facing surface, and the rail bracket and the steel anchor plate are effectively welded after the facade formwork is removed;

[0018] d. Weld and fix the external rails to the rail supports. The external rails are assembled with standard hollow round steel. Each standard rail section is welded to at least two rail supports. The first and last rail supports are fully wrapped with the corresponding rail sections. The middle rail supports are welded to the corresponding rail sections with a 1 / 4 to 1 / 3 arc. Reliable anti-corrosion measures are adopted for the external rails and rail supports.

[0019] e. The sliding structure of the pollution-blocking float is connected to the external steel rail by nested sliding, and can automatically rise and fall with the rise and fall of water level.

[0020] The beneficial effects achieved by the present invention are:

[0021] (1) The tower side backfill concrete is used as the lower concrete of the end structure of the trash trap, which reduces the amount of concrete poured, saves the independent construction period of the end structure of the trash trap, and can share the same construction platform with the tower body concrete pouring, reducing the construction cost;

[0022] (2) The upper structure concrete is set on the side of the tower body concrete and the upper part of the tower side backfill concrete. Compared with the solution of deploying the end structure of the pollution-blocking float on the slopes on both sides of the upstream of the water intake tower, it saves the construction projects such as slope excavation and support, avoids the impact of excavation and blasting on the structure and construction period of the water intake tower concrete construction, and avoids the high cost of setting up an independent construction platform;

[0023] (3) The upper structure of the end of the mining and intercepting sewage float is anchored with the tower body concrete and the tower side backfill concrete through inserted reinforcement. On the basis of ensuring the stability of the structure, a light "gravity dam" concrete structure is adopted, which reduces the difficulties in the large-volume concrete pouring process and has better technical and economic performance;

[0024] (4) The traditional end structure of the trash-blocking float adopts a built-in pulley or slide rail guide groove, and the manufacturing and installation processes such as splicing the template corners and reserving the reinforcement holes are complicated. When the poured concrete is upgraded according to the end structure of the trash-blocking float, it is necessary to cut the original concrete or cast an external guide groove. The present invention adopts an external steel rail solution to solve the problems of the traditional built-in guide groove, which is difficult to construct, has a long construction period, high construction cost, and is difficult to maintain, thereby reducing the construction difficulty and project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 for Figure 1 A top view of

[0027] Figure 3 for Figure 1 Side view of

[0028] Figure numerals: 1. Upper structure concrete; 2. Tower side backfill concrete; 3. External rails; 4. Rail brackets; 5. Tower body concrete; 6. Inserted reinforcement; 7. Trash-blocking sliding structure; 8. Steel anchor plate. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1-3As shown, an external steel rail type light trash-blocking float end structure of the present invention includes tower body concrete 5, trash-blocking float sliding structure 7, upper structure concrete 1, tower side backfill concrete 2 and external steel rail 3. The upper structure concrete 1 and tower side backfill concrete 2 are both arranged on the side of the tower body concrete 5. The upper structure concrete 1 is located on the upper part of the tower side backfill concrete 2. The tower side backfill concrete 2 is used as the lower concrete of the trash-blocking float end structure, which reduces the amount of concrete poured, saves the independent construction period of the trash-blocking float end structure, and can share the same construction platform with the tower body concrete 5, thereby reducing the construction cost. Moreover, the upper structure concrete 1 is arranged on the side of the tower body concrete 5 and the upper part of the tower side backfill concrete 2. Compared with the scheme of deploying the trash-blocking float end structure on the slopes on both sides of the upstream of the water intake tower, it saves the construction projects such as slope excavation and support, avoids the influence of excavation and blasting on the structure and construction period of the water intake tower concrete construction, and avoids the high cost of independently setting up a construction platform.

[0031] In this embodiment, the upper structure concrete 1 is anchored to the tower body concrete 5 and the tower side backfill concrete 2 by dowel bars 6. A light "gravity dam type" concrete structure is adopted on the basis of ensuring structural stability, which alleviates the difficulties in the large-volume concrete pouring process and has better technical and economic benefits.

[0032] During the construction of the tower side backfill concrete 2 and the upper structure concrete 1, a steel anchor plate 8 is pre-buried at the designed position of the trash float guide channel on the water-facing surface. After the facade formwork is removed, the rail bracket 4 and the steel anchor plate 8 are effectively welded. An external rail 3 is fixed on the rail bracket 4. The external rail 3 is arranged on the outer facade of the tower side backfill concrete 2 and the upper structure concrete 1. The trash float sliding structure 7 and the external rail 3 are connected by nested sliding, and can be automatically raised and lowered with the rise and fall of the water level.

[0033] The external rails 3 are assembled with standard hollow round steel sections. Each standard rail section is welded and fixed to at least two rail supports 4. The head and tail rail supports 4 need to be fully wrapped and welded with the corresponding rail sections. The middle rail support 4 is welded to the corresponding rail section with a 1 / 4 to 1 / 3 arc. The rail support 4 is welded to the steel anchor plate 8 embedded in the concrete at the end of the trash float. The trash float sliding structure 7 and the external rails 3 are connected by nested sliding. The external rails 3 and the rail supports 4 adopt reliable anti-corrosion measures, which can reduce the friction of the trash float when it is lifted and lowered, facilitate subsequent maintenance, and reduce operating costs.

[0034] The invention discloses a method for constructing an external rail-type light-duty pollution-blocking float end structure, comprising the following steps:

[0035] a. After the tower side backfill concrete 2 is poured to the design elevation, the upper structure concrete 1 is poured on the side of the tower body concrete 5 and the upper part of the tower side backfill concrete 2. When pouring the upper structure concrete 1, the side of the tower body concrete 5 and the upper surface of the tower side backfill concrete 2 need to be roughened and pre-embedded with dowel bars 6 to anchor the upper structure concrete 1;

[0036] b. The upper structure concrete 1 is designed and constructed according to the "gravity dam type" shape, and its basic cross-section is triangular, and the upstream surface is designed to be a vertical section; the upper structure concrete (01) can also be poured and raised synchronously with the tower body concrete 5;

[0037] c. During the construction of the tower side backfill concrete 2 and the upper structure concrete 1, a steel anchor plate 8 is pre-buried at the designed position of the sewage drift guide channel on the water-facing surface, and the rail bracket 4 is effectively welded to the steel anchor plate 8 after the facade formwork is removed;

[0038] d. Weld and fix the external rail 3 to the rail bracket 4. The external rail 3 is assembled with standard hollow round steel. Each standard rail segment is welded and fixed to at least two rail brackets 4. The first and last rail brackets 4 are fully wrapped with the corresponding rail segments. The middle rail bracket 4 is welded with the corresponding rail segment with a 1 / 4 to 1 / 3 arc. Reliable anti-corrosion measures are adopted for the external rail 3 and the rail bracket 4.

[0039] e. The pollution-blocking floating sliding structure 7 and the external steel rail 3 are connected by nested sliding, and can automatically rise and fall with the rise and fall of water level.

[0040] The above shows and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An external rail-type light-duty trash-blocking float end structure, comprising a tower body concrete (5) and a trash-blocking float sliding structure (7), characterized in that: It also includes upper structure concrete (1), tower side backfill concrete (2) and external steel rails (3), wherein the upper structure concrete (1) and tower side backfill concrete (2) are both arranged on the side of the tower body concrete (5), the upper structure concrete (1) is located above the tower side backfill concrete (2), and the upper structure concrete (1) is anchored to the tower body concrete (5) and the tower side backfill concrete (2) through dowel bars (6); The water-facing surfaces of the tower side backfill concrete (2) and the upper structure concrete (1) are provided with steel anchor plates (8), a steel rail bracket (4) is fixedly provided on the steel anchor plates (8), an external steel rail (3) is fixedly provided on the steel rail bracket (4), the external steel rail (3) is arranged on the outer facades of the tower side backfill concrete (2) and the upper structure concrete (1), and the debris-blocking floating sliding structure (7) and the external steel rail (3) are connected by nested sliding.

2. The external rail-type light-duty trash-blocking float end structure according to claim 1 is characterized in that: The rail support (4) and the steel anchor plate (8), as well as the external rail (3) and the rail support (4) are all fixed by welding.

3. The external rail-type light-duty trash-blocking float end structure according to claim 1 is characterized in that: The external steel rail (3) is assembled from multiple sections of standard hollow round steel.

4. The external rail-type light-duty trash-blocking float end structure according to claim 3 is characterized in that: Each standard section of steel rail is fixed to at least two steel rail supports (4) by welding.

5. The external rail-type light-duty trash-blocking float end structure according to claim 4 is characterized in that: The first and last rail supports (4) are fully wrapped and welded with the corresponding rail sections, and the middle rail support (4) is welded with the corresponding rail sections using 1 / 4 to 1 / 3 arc welding.

6. The external rail-type light-duty trash-blocking float end structure according to claim 1 is characterized in that: The steel anchor plate (8) is arranged at the position of the pollution-blocking and drifting guide groove on the water-facing surface of the tower side backfill concrete (2) and the upper structure concrete (1).

7. A method for constructing an external rail-mounted lightweight pollution-blocking float end structure, comprising the following steps: a. After the tower side backfill concrete (2) is poured to the designed elevation, the upper structure concrete (1) is poured on the side of the tower body concrete (5) and on the upper part of the tower side backfill concrete (2). When pouring the upper structure concrete (1), the side of the tower body concrete (5) and the upper surface of the tower side backfill concrete (2) need to be roughened and pre-embedded with dowel bars (6) to anchor the upper structure concrete (1); b. The upper structure concrete (1) is designed and constructed in accordance with the "gravity dam" shape, with a basic cross-section in the shape of a triangle and the upstream side designed as a vertical section; c. During the construction of the tower side backfill concrete (2) and the upper structure concrete (1), a steel anchor plate (8) is pre-buried at the designed position of the pollution-blocking drift guide channel on the water-facing surface, and after the facade formwork is removed, the steel rail bracket (4) and the steel anchor plate (8) are effectively welded; d. The external rail (3) is welded and fixed to the rail bracket (4), wherein the external rail (3) is assembled with standard hollow round steel, each standard rail segment is welded and fixed to at least two rail brackets (4), the first and last rail brackets (4) are fully wrapped and welded to the corresponding rail segment, and the middle rail bracket (4) is welded to the corresponding rail segment at 1 / 4 to 1 / 3 of the arc, and reliable anti-corrosion measures are adopted for the external rail (3) and the rail bracket (4); e. The trash-blocking floating sliding structure (7) and the external steel rail (3) are connected by nested sliding, and can automatically rise and fall with the rise and fall of water level.

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