Arch frame pre-pressing structure of cast-in-place concrete arch bridge hanging water bag

Abstract

The utility model provides an arch frame pre-pressing structure of a cast-in-place concrete arch bridge hanging water bag, which comprises an arch frame, the arch frame comprises a plurality of arch frame sections, and the arch frame sections are sequentially assembled to form the arch frame; the water bag is hung below the arch frame, a hanging ring is arranged above the water bag, and a water inlet and a water outlet are formed in the water bag; the water bags are hung on the supporting steel pipes through hanging rings, each supporting steel pipe is provided with a plurality of water bags, the water bags are evenly arranged on the supporting steel pipes, the supporting steel pipes are fixedly installed on the arch frame sections through U-shaped bolts and pressing beams, and the supporting steel pipes are transversely arranged on the lower edges of the arch frame sections along the arch frame sections. And each arch frame section is correspondingly provided with one supporting steel pipe. According to the structure, a complex support system does not need to be erected, the water bag is directly hung on the lower edge of the arch ring, the stress mechanism is clear, the high-altitude operation time is greatly shortened, the construction cost is saved, and construction is easy and fast.

Description

Technical Field

[0001] This utility model relates to the field of engineering technology, specifically to a pre-stressing structure for hanging water bags on a cast-in-place concrete arch bridge. Background Technology

[0002] Reinforced concrete arch bridges are widely used in mountainous areas of my country due to their low cost and high load-bearing capacity, often spanning valleys and rivers. The construction process typically involves cantilever assembly of the arch frame using cable-stayed hoisting without supports. After the arch frame is closed, the cables are removed, forming the arch frame support system. To test the load-bearing capacity of the arch frame, eliminate inelastic deformation, and provide a basis for adjusting the arch ring's shape, pre-stressing is required. Traditional construction methods involve erecting disc-lock scaffolding above the arch frame, forming multiple stepped platforms, and then loading the platform for pre-stressing. After pre-stressing, the scaffolding must be dismantled before the arch ring formwork can be laid. This process of installing and dismantling scaffolding is not only complex but also time-consuming. Utility Model Content

[0003] In view of this, the problem to be solved by this utility model is to provide an arch frame pre-stressing structure for suspending water bags in cast-in-place concrete arch bridges. This structure does not require the construction of a complex support system, and the water bags are directly suspended from the lower edge of the arch ring. The force mechanism is clear, which greatly shortens the time for high-altitude operations, saves project costs, and makes construction simple and quick.

[0004] This utility model solves the above-mentioned technical problems through the following technical means: This utility model provides a pre-stressing structure for suspending water bags on a cast-in-place concrete arch bridge, comprising,

[0005] An arch frame, comprising multiple arch frame segments, which are sequentially assembled to form the arch frame;

[0006] A water bag is suspended below the arch frame, with a hanging ring on the top of the water bag and water inlet and outlet on the water bag.

[0007] The water bags are suspended on the supporting steel pipes by hanging rings. Multiple water bags are set on each supporting steel pipe and are evenly distributed on the supporting steel pipes. The supporting steel pipes are fixedly installed on the arch frame segments by U-bolts and pressure beams. The supporting steel pipes are set laterally along the lower edge of the arch frame segments, and one supporting steel pipe is set on each arch frame segment.

[0008] Furthermore, the supporting steel pipe is provided with a groove that matches the hanging ring, and the hanging ring is disposed in the groove.

[0009] Furthermore, a water pipe is installed inside the supporting steel pipe, and multiple water outlets are provided on the water pipe. The water outlets are located near the slots, and each slot has one water outlet.

[0010] Furthermore, the water bag is equipped with inlet and outlet pipes, one end of which is connected to the inlet and outlet, and the other end is inserted into the bottom of the water bag. The outlet is equipped with a quick connector, and the inlet and outlet of the water bag are equipped with quick connectors that match the quick connectors.

[0011] Furthermore, each outlet is equipped with a solenoid valve and a flow meter.

[0012] Furthermore, the pressure beam is provided with through holes corresponding to the U-bolts. The pressure beam is located above the lower edge rod of the arch frame segment, and the supporting steel pipe is located below the lower edge rod of the arch frame segment. The concave end of the U-bolt is sleeved on the supporting steel pipe, and the upper end passes through the through hole on the pressure beam and is fixed to the pressure beam by a washer and a nut.

[0013] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows: This utility model provides a pre-stressing structure for suspending water bags on a cast-in-place concrete arch bridge, comprising: an arch frame, the arch frame comprising multiple arch frame segments, the multiple segments being assembled sequentially to form the arch frame; water bags, the water bags being suspended below the arch frame, the water bags having hanging rings above them, and inlet and outlet ports on them; and supporting steel pipes, the water bags being suspended from the supporting steel pipes via the hanging rings, each supporting steel pipe having multiple water bags evenly distributed on it, the supporting steel pipes being fixedly installed on the arch frame segments by U-bolts and pressure beams, the supporting steel pipes being transversely positioned along the lower edge of the arch frame segments, with one supporting steel pipe corresponding to each arch frame segment. This structure eliminates the need for a complex support system, directly suspending the water bags at the lower edge of the arch ring, with a clear force mechanism, significantly shortening the time for high-altitude operations, saving project costs, and making construction simple and quick. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 A schematic diagram of the installation of the arch frame preloading structure for suspending water bags in a cast-in-place concrete arch bridge, provided for this utility model;

[0016] Figure 2 A schematic diagram of the installation of an arch frame segment for a pre-stressed structure of an arch frame for suspending water bags in a cast-in-place concrete arch bridge, provided by this utility model;

[0017] Figure 3 for Figure 2 Side view;

[0018] Figure 4 for Figure 3 A magnified view of the location of the U-bolt in the middle;

[0019] Figure 5 A partial schematic diagram of the supporting steel pipe of the arch frame preloading structure for suspending water bags in a cast-in-place concrete arch bridge, provided by this utility model;

[0020] Figure label:

[0021] 1-Arch frame segment; 2-Water bag; 21-Hanging ring; 3-Supporting steel pipe; 31-Card slot; 32-Water pipe; 33-Outlet; 4-U-bolt; 5-Pressure beam. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] Please see Figures 1-5 This utility model provides a pre-stressing structure for the arch frame of a cast-in-place concrete arch bridge with a suspended water bag 2, comprising,

[0024] An arch frame, comprising multiple arch frame segments 1, which are sequentially assembled to form the arch frame;

[0025] Water bag 2, the water bag 2 is suspended below the arch frame, the water bag 2 is provided with a hanging ring 21 above the water bag 2, and the water bag 2 is provided with an inlet and outlet 33;

[0026] The supporting steel pipe 3 is used to suspend the water bags 2 on the supporting steel pipe 3 via the hanging ring 21. Multiple water bags 2 are set on each supporting steel pipe 3 and are evenly distributed on the supporting steel pipe 3. The supporting steel pipe 3 is fixedly installed on the arch frame segment 1 by U-bolts and pressure beam 5. The supporting steel pipe 3 is set laterally on the lower edge of the arch frame segment 1, and one supporting steel pipe 3 is set on each arch frame segment 1.

[0027] The specific installation and usage steps are as follows: Assemble the arch frame on the ground according to the segment divisions; install the hanging ring 21 on the water bag 2 into the slot 31 of the supporting steel pipe 3 on the ground, then place the supporting steel pipe 3 on the lower edge of the arch frame segment 1 and place the pressure beam 5 on the arch frame segment 1. Then, fix the supporting steel pipe 3 to the pressure beam 5 with U-bolts and nuts, so that the supporting steel pipe 3 is fixed on the lower edge of the arch frame segment 1. Then, according to the design drawings, cantilever assemble the arch frame segment 1 section by section using a cable hoisting system until closure; remove the temporary locking buckles to form a complete arch frame support system; at L / 8, L / 4, 3L / 8, ... Displacement observation points were set at L / 2, 5L / 8, 3L / 4, and 7L / 8. Water was injected into water bag 2 according to the pouring sequence of the reinforced concrete arch ring. The preload was applied in stages according to the design load: 40% → 80% → 100% → 110%. The displacement of the arch frame was continuously monitored and recorded during the loading process. After the arch frame was poured, water bag 2 was pumped out and unloaded. The unloading of the arch frame also required stages: 110% → 100% → 800% → 40% → 0. The displacement of the arch frame was continuously monitored and recorded during the unloading process. After the arch frame was unloaded, water bag 2 and supporting steel pipe 3 were removed, and subsequent construction could proceed.

[0028] As a further improvement to the above technical solution, the supporting steel pipe 3 is provided with a groove 31 that matches the hanging ring 21, and the hanging ring 21 is disposed in the groove 31. By setting the groove 31, the hanging ring 21 on the water bag 2 is disposed in the groove 31 to prevent the water bag 2 from sliding and moving on the supporting steel pipe 3; preferably, baffles are provided on both sides of the groove 31 to further restrict the movement of the hanging ring 21. The hanging ring 21 is set as a U-shaped retaining ring. During installation, the U-shaped retaining ring is engaged in the groove 31 and then the sling is hung on the pin of the retaining ring.

[0029] As a further improvement to the above technical solution, a water pipe 32 is installed inside the supporting steel pipe 3. Multiple water outlets 33 are provided on the water pipe 32, located near the slots 31, with one water outlet 33 at each slot 31. By installing the water pipe 32 inside the supporting steel pipe 3 and connecting it to the water supply pipe 32 when water needs to be injected, and connecting it to a water pump when water needs to be discharged, water can be pumped out. Each water bag 2 has a water outlet 33 connected to the inlet and outlet 33 on the water bag 2, allowing for individual water supply and drainage for each water bag 2. Each water outlet 33 is equipped with a solenoid valve and a flow meter, enabling precise control of the amount of water pumped out and drained from each water bag 2, thus accurately controlling the load on the water bag 2 and precisely loading and unloading the water bag 2.

[0030] The water bag 2 is equipped with an inlet / outlet pipe 32. One end of the inlet / outlet pipe 32 is connected to the inlet / outlet 33, and the other end is inserted into the bottom of the water bag 2. The outlet 33 is equipped with a quick connector, and the inlet / outlet 33 of the water bag 2 is equipped with a quick connector that matches the quick connector. The quick connector and quick connector facilitate the connection of the outlet 33, and inserting the inlet / outlet pipe 32 into the bottom of the water bag 2 facilitates drainage and unloading.

[0031] As a further improvement to the above technical solution, the pressure beam 5 is provided with through holes corresponding to the U-bolts 4. The pressure beam 5 is positioned above the lower edge rod of the arch segment 1, and the supporting steel pipe 3 is positioned below the lower edge rod of the arch segment. The concave end of the U-bolt 4 is sleeved on the supporting steel pipe 3, and the upper end passes through the through hole on the pressure beam 5 and is fixed to the pressure beam 5 by a washer and a nut. By setting the U-bolts 4 that match the supporting steel pipe 3 and the pressure beam 5, the lower edge rod of the arch segment 1 is pressed between the supporting steel pipe 3 and the pressure beam 5 by the pressure beam 5, and the supporting steel pipe 3 is fixed to the pressure beam 5 by the U-bolts, thereby fixing the supporting steel pipe 3 to the lower edge of the arch segment 1. This makes it easier to install the water bag 2 at the corresponding position on the arch segment 1, and also facilitates its disassembly, recycling, and repeated use. Alternatively, the pressure beam 5 can be set as two channel steels spliced ​​on the back, with U-bolts 4 passing through the gap between the two channel steels, and a pressure plate set on the upper surface of the two channel steels. Through holes are set on the pressure plate, and the U-bolts are fixed by nuts after passing through the through holes.

[0032] The present invention has a clear force mechanism. The water bag 2 is pre-suspended on the lower edge of the arch frame on the ground, which effectively shortens the time of high-altitude operation, reduces the construction safety risk, and avoids the complex construction and dismantling of the disc buckle support system. The next step of construction can be carried out after the pre-stressing is completed, which greatly shortens the construction period. The present invention has the characteristics of safety, applicability, economy and efficiency, and has significant economic value and social benefits in the construction of reinforced concrete arch bridges.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. An arch preloading structure for hanging water bags on a cast-in-place concrete arch bridge, characterized in that: include, An arch frame, wherein the arch frame comprises a plurality of arch frame segments, and the plurality of arch frame segments are assembled in sequence to form the arch frame; A water bag, the water bag is hung below the arch frame, a hanging ring is provided above the water bag, and a water inlet and outlet are provided on the water bag; Support steel pipe, the water bag is hung on the support steel pipe through a hanging ring, each support steel pipe is provided with multiple water bags, and the multiple water bags are evenly arranged on the support steel pipe, the support steel pipe is fixedly installed on the arch frame segment through U-bolts and pressure beams, the support steel pipe is transversely arranged on the lower edge of the arch frame segment along the arch frame segment, and a support steel pipe is correspondingly arranged on each arch frame segment.

2. The arch frame pre-compression structure for hanging water bags of a cast-in-place concrete arch bridge according to claim 1 is characterized by: The supporting steel pipe is provided with a slot matching the hanging ring, and the hanging ring is arranged in the slot.

3. The arch frame pre-compression structure for hanging water bags of a cast-in-place concrete arch bridge according to claim 2 is characterized in that: A water pipe is arranged in the supporting steel pipe, and a plurality of water outlets are arranged on the water pipe. The water outlets are arranged near the slots, and each slot is respectively provided with a water outlet.

4. The arch frame pre-compression structure for hanging water bags of a cast-in-place concrete arch bridge according to claim 3 is characterized by: The water bag is provided with a water inlet and outlet pipe, one end of the water inlet and outlet pipe is connected with the water inlet and outlet, and the other end is inserted into the bottom of the water bag, the water outlet is provided with a quick interface, and the water inlet and outlet of the water bag are provided with a quick connector matching the quick interface.

5. The arch frame pre-compression structure for hanging water bags of a cast-in-place concrete arch bridge according to claim 4 is characterized in that: Each water outlet is respectively provided with a solenoid valve and a flow meter.

6. The arch frame pre-compression structure for hanging water bags of a cast-in-place concrete arch bridge according to claim 1 is characterized by: The pressure beam is provided with a through hole corresponding to the U-shaped bolt, the pressure beam is arranged above the lower edge rod of the arch frame segment, the supporting steel pipe is arranged below the lower edge rod of the arch frame stage, the concave end of the U-shaped bolt is sleeved on the supporting steel pipe, and the upper end passes through the through hole on the pressure beam and is fixed to the pressure beam through a pad and a nut.

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