A construction method for hoop-prestressed steel wire ropes

Abstract

The present invention discloses a construction method for hoop-prestressed steel wire ropes. Step 1: Select the upper and lower ends of the bridge pier to be reinforced as the layout locations for the connecting device. Step 2: Clean the bonding surfaces between the layout locations and the connecting device and apply adhesive. Step 3: Adhere the connecting device to the layout locations. Step 4: Install the hoop-arranged steel wire ropes and a first anchor. Step 5: Install the spiral-arranged steel wire ropes and a second anchor. Step 6: Tension anchoring. This construction method for hoop-prestressed steel wire ropes solves the problem of repairing and reinforcing vertical cracks in bridge piers.

Description

Technical Field

[0001] The present invention relates to the technical field of steel wire rope construction, in particular to a steel wire rope hoop prestressed construction method. Background Art

[0002] The existing patent, the patent name is "Transverse prestressed steel wire rope reinforcement structure and construction method of assembled hollow slab beam bridge", the patent number is CN202010708831.X, which discloses a transverse prestressed steel wire rope reinforcement structure and construction method of an assembled hollow slab beam bridge, which relates to the field of bridge reinforcement and maintenance, including a polymer mortar layer, hinged joint concrete, hinged joint reinforcement glue, multiple connecting steel bars and multiple steel wire rope reinforcement systems arranged in sequence along the longitudinal direction of the bottom surface of the hollow slab. The hinged joint concrete is poured in the hinged joint between adjacent hollow slabs, and the hinged joint reinforcement glue is poured into the gap in the hinged joint concrete. The steel wire rope reinforcement system includes a fixed end anchor assembly, a tensioning end anchor assembly, multiple positioning plates and multiple steel wire ropes; multiple connecting steel bars are arranged between two adjacent steel wire rope reinforcement systems, and the multiple connecting steel bars are fixed on the bottom surface of the hollow slab; the polymer mortar layer is fixedly connected to the bottom surface of the hollow slab. The transverse prestressed steel wire rope reinforcement structure and construction method of the assembled hollow slab beam bridge provided by the present invention improve the integrity and durability of the hollow slab beam bridge and effectively inhibit the occurrence and development of longitudinal cracks in the hollow slab.

[0003] The existing patent, the patent name is "Rewinding prestressed steel wire rope anchoring system", the patent number is CN201620294658.2, which discloses a rewinding prestressed steel wire rope anchoring system, including anchor plates, anchor nails, bearings or sliding rings. The anchor plates on both sides are provided with anchor nails at staggered positions, and the anchor nails are provided with bearings or sliding rings. The steel wire rope passes through the bearings or sliding rings around the anchor nails of the anchor plates on both sides. The steel wire rope wrapped around the anchor nails of the anchor plates on both sides is synchronously tensioned and anchored to form a rewinding prestressed steel wire rope anchoring system. The construction method of the rewinding prestressed steel wire rope anchoring system is to wind the entire steel wire rope back and forth on the anchors on both sides and perform synchronous tensioning and anchoring; so that multiple sections of steel wire rope that play a reinforcing role in a reinforcement area of the entire steel wire rope can be anchored and tensioned into shape at one time, which simplifies the anchoring device, saves a lot of engineering materials and engineering construction period, reduces the damage to the original structure caused by the anchoring installation, and has good social and economic benefits.

[0004] The existing patent, the patent name is "A reinforced concrete beam prestressed steel wire rope reinforcement device", the patent number is CN201810559932.8, which discloses a reinforced concrete beam prestressed steel wire rope reinforcement device, including a concrete beam, both sides of the concrete beam are fixedly connected with steel plate anchors, the steel plate anchors are connected to the concrete beam through a first reinforcement mechanism, the steel plate anchors are fixedly connected with tensioning end anchor plates, a connecting steel plate is provided between the two steel plate anchors, the steel plate is connected to the concrete beam through a second reinforcement mechanism, a fixed steel plate is fixedly connected to the connecting steel plate, and a plurality of anchoring mechanisms for stretching the two tensioning end anchor plates are connected between the two tensioning end anchor plates. In the present invention, by arranging the tensioning of prestressed steel wire ropes on both sides of the concrete beam, the application of prestress is achieved, the stability of the concrete beam is improved, and at the same time, another entire steel wire rope can be tensioned and formed at one time, which is convenient for anchoring, greatly saving the construction period of engineering materials, and having a good effect.

[0005] For the problem of vertical cracking on bridge piers, the above-mentioned existing patented technology can be used to apply prestressed reinforcement to the piers in the circumferential direction. However, holes must be drilled on the surface of the piers to install anchor plates, which on the one hand damages the intact surface of the piers and on the other hand brings new cracking problems to the piers. At the same time, the anchor plates in the above-mentioned second existing patent are large and complex in structure, and the cost is high. Summary of the Invention

[0006] In response to the above problems, the present invention provides a steel wire rope hoop prestressing construction method, which solves the problem of repairing and reinforcing vertical cracks in bridge piers.

[0007] The present invention adopts the following technical solutions to achieve the above purpose:

[0008] A steel wire rope hoop prestressing construction method comprises the following steps:

[0009] Step 1: Construction preparation: Prepare at least two connecting devices, each of which has a bonding surface, and select the upper and lower ends of the reinforced pier as the layout positions of the connecting devices;

[0010] Step 2: Applying adhesive: Clean the layout position and apply adhesive; Clean the bonding surface of the connecting device and apply adhesive;

[0011] Step 3, bonding the connecting device: bonding the bonding surfaces of the connecting device to the layout positions respectively, and temporarily fixing them with a temporary fixing tool;

[0012] Step 4: Installing the hoop-arranged steel wire rope and the first anchor: Passing the hoop-arranged steel wire rope around the reinforced pier, and connecting the opposite ends of the hoop-arranged steel wire rope to the connecting device through the first anchor respectively, and then tensioning and anchoring, and then removing the temporary fixing tool;

[0013] Step 5: Install the spirally arranged steel wire rope and the second anchor: one end of the spirally arranged steel wire rope is connected to the connecting device at one end of the reinforced bridge pier through the second anchor and pre-tensioned; the other end of the spirally arranged steel wire rope is spirally wound around the reinforced bridge pier and connected to the connecting device at the other end of the reinforced bridge pier through the second anchor and pre-tensioned;

[0014] Step six, tensioning and anchoring: the opposite ends of the spirally arranged steel wire rope and the second anchor are simultaneously tensioned and anchored in place.

[0015] Preferably, in step 1, the layout positions are located on the same plane as the reinforced piers.

[0016] Preferably, in step 1, the layout positions are located on different planes of the reinforced piers.

[0017] Preferably, in step 2, the adhesive is steel adhesive.

[0018] Preferably, in step three, the temporary fixing tool is a supporting pressure plate.

[0019] The beneficial effects of the present invention are:

[0020] The present invention's circumferential prestressing method secures the connecting device to the pier surface using an adhesive, circumferentially arranged wire ropes, and a first anchor. This ensures a stable connection between the connecting device and the pier without damaging the pier surface, reducing the likelihood of pier cracking. The circumferentially arranged wire ropes and first anchor can also reinforce and repair pier cracks, improving the quality of the repair. Furthermore, by using a spiral arrangement of wire ropes and a second anchor, two sets of the second anchor can form multiple loops of wire rope for circumferential tensioning and reinforcement, reducing the number of anchors required and optimizing the tensioning and reinforcement structure. The symmetrical spiral arrangement of wire ropes and the second anchor also improves tensioning stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall flow chart of the steel wire rope hoop prestressing construction method provided in Example 1 of the present invention;

[0022] Figure 2 A construction structure diagram of step three in the steel wire rope hoop prestressing construction method provided in Example 1 of the present invention;

[0023] Figure 3 A construction structure diagram of step 4 in the steel wire rope hoop prestressing construction method provided in Example 1 of the present invention;

[0024] Figure 4A construction structure diagram of step five in the steel wire rope hoop prestressing construction method provided in Example 1 of the present invention;

[0025] Figure 5 A construction structure diagram of step five in the steel wire rope hoop prestressing construction method provided in Example 1 of the present invention;

[0026] Figure 6 A construction structure diagram of the steel wire rope hoop prestressing construction method provided in Example 2 of the present invention;

[0027] Figure 7 This is a construction structure diagram of the wire rope hoop prestressing construction method provided in Example 3 of the present invention.

[0028] In the figure, 1-reinforced pier, 2-connecting device, 3-annularly arranged wire rope, 4-helical arranged wire rope. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-7 The present invention is described in detail with specific examples.

[0030] Example 1

[0031] Please also see Figures 1 to 5 This embodiment provides a method for constructing a prestressed steel wire rope, comprising the following steps:

[0032] Step 1, construction preparation: prepare two connecting devices 2, each of which is provided with a bonding surface, and select the upper and lower ends of the reinforced pier 1 as the layout positions of the connecting devices 2; in this embodiment, the layout positions are located on the same plane of the reinforced pier 1, that is, the two layout positions are respectively located at the upper and lower ends of the same vertical plane of the reinforced pier 1.

[0033] Step 2: Apply adhesive: clean the layout position and apply adhesive; clean the bonding surface of the connecting device 2 and apply adhesive; in this embodiment, the adhesive is steel glue.

[0034] Step 3, bonding the connecting device: Bond the bonding surface of the connecting device 2 to the connection device layout position respectively, and temporarily fix it with a temporary fixing tool, such as Figure 2 ; In this embodiment, the temporary fixing tool is a supporting pressure plate.

[0035] Step 4: Install the hoop-shaped steel wire rope and the first anchor: Pass the hoop-shaped steel wire rope 3 around the reinforced pier 1, and connect the opposite ends of the hoop-shaped steel wire rope 3 to the connecting device 2 through the first anchor respectively, then tension and anchor them, and then remove the temporary fixing tooling. Figure 3 In this embodiment, there are two annularly arranged steel wire ropes 3, and each connecting device 2 is provided to connect one annularly arranged steel wire rope 3.

[0036] Step 5: Install the spirally arranged steel wire rope and the second anchor: one end of the spirally arranged steel wire rope 4 is connected to the connecting device 2 at one end of the reinforced pier 1 through the second anchor, and is tensioned and pre-tightened; the other end of the spirally arranged steel wire rope 4 is spirally wound around the reinforced pier 1, and is connected to the connecting device 2 at the other end of the reinforced pier 1 through the second anchor, and is tensioned and pre-tightened; in this embodiment, there are two spirally arranged steel wire ropes 4, each of which is spirally wound around the reinforced pier 1, and the opposite ends of each spirally arranged steel wire rope 4 are respectively connected to the connecting devices 2 at the upper and lower ends of the reinforced pier 1, as shown in FIG. Figures 4 and 5 .

[0037] Step 6: tensioning and anchoring: the opposite ends of the spirally arranged steel wire rope 4 and the second anchor are simultaneously tensioned and anchored in place.

[0038] Example 2

[0039] In this embodiment, except for the different location of the connection device 2, everything else is the same as that of the first embodiment.

[0040] See Figure 6 This embodiment provides a method for constructing a prestressed steel wire rope, comprising the following steps:

[0041] Step 1, construction preparation: prepare two connecting devices 2, each of which is provided with a bonding surface, and select the upper and lower ends of the reinforced pier 1 as the layout positions of the connecting devices 2; in this embodiment, the layout positions are located on different planes of the reinforced pier 1, that is, the two layout positions are respectively located on different vertical planes of the reinforced pier 1, and these two vertical planes are adjacent vertical planes.

[0042] Step 2: Apply adhesive: clean the layout position and apply adhesive; clean the bonding surface of the connecting device 2 and apply adhesive; in this embodiment, the adhesive is steel glue.

[0043] Step three, bonding the connecting device: bonding the bonding surfaces of the connecting device 2 to the layout positions of the connecting device respectively, and temporarily fixing them with a temporary fixing tool; in this embodiment, the temporary fixing tool is a supporting pressure plate.

[0044] Step 4: Install the annularly arranged steel wire rope and the first anchor: Pass the annularly arranged steel wire rope 3 around the reinforced pier 1, and connect the opposite ends of the annularly arranged steel wire rope 3 to the connecting device 2 through the first anchor respectively, and then tension and anchor them, and then remove the temporary fixing tooling; in this embodiment, there are two annularly arranged steel wire ropes 3, and each connecting device 2 is provided with a annularly arranged steel wire rope 3.

[0045] Step five, install the spirally arranged steel wire rope and the second anchor: one end of the spirally arranged steel wire rope 4 is connected to the connecting device 2 at one end of the reinforced pier 1 through the second anchor, and is tensioned and pre-tightened; the other end of the spirally arranged steel wire rope 4 is spirally wrapped around the reinforced pier 1, and is connected to the connecting device 2 at the other end of the reinforced pier 1 through the second anchor, and is tensioned and pre-tightened; in this embodiment, there are two spirally arranged steel wire ropes 4, each of which is spirally wrapped around the reinforced pier 1, and the opposite ends of each spirally arranged steel wire rope 4 are respectively connected to the connecting devices 2 at the upper and lower ends of the reinforced pier 1.

[0046] Step 6: tensioning and anchoring: the opposite ends of the spirally arranged steel wire rope 4 and the second anchor are simultaneously tensioned and anchored in place.

[0047] Example 3

[0048] In this embodiment, except for the different setting position of the connecting device 2 and the different number of the circumferentially arranged steel wire ropes 3, everything else is the same as that of the embodiment 1.

[0049] See Figure 7 This embodiment provides a method for constructing a prestressed steel wire rope, comprising the following steps:

[0050] Step 1, construction preparation: prepare two connecting devices 2, each of which is provided with a bonding surface, and select the upper and lower ends of the reinforced pier 1 as the layout positions of the connecting devices 2; in this embodiment, the two layout positions are respectively located on different planes of the reinforced pier 1, that is, the two layout positions are respectively located on different vertical planes of the reinforced pier 1, and these two vertical planes are opposite vertical planes.

[0051] Step 2: Apply adhesive: clean the layout position and apply adhesive; clean the bonding surface of the connecting device 2 and apply adhesive; in this embodiment, the adhesive is steel glue.

[0052] Step three, bonding the connecting device: bonding the bonding surfaces of the connecting device 2 to the layout positions of the connecting device respectively, and temporarily fixing them with a temporary fixing tool; in this embodiment, the temporary fixing tool is a supporting pressure plate.

[0053] Step 4: Install the annularly arranged steel wire rope and the first anchor: Pass the annularly arranged steel wire rope 3 around the reinforced pier 1, and connect the opposite ends of the annularly arranged steel wire rope 3 to the connecting device 2 through the first anchor, and then tension and anchor them, and then remove the temporary fixing tooling; in this embodiment, there are four annularly arranged steel wire ropes 3, and each connecting device 2 is respectively provided with two annularly arranged steel wire ropes 3 to achieve the effect of further reinforcement.

[0054] Step five, install the spirally arranged steel wire rope and the second anchor: one end of the spirally arranged steel wire rope 4 is connected to the connecting device 2 at one end of the reinforced pier 1 through the second anchor, and is tensioned and pre-tightened; the other end of the spirally arranged steel wire rope 4 is spirally wrapped around the reinforced pier 1, and is connected to the connecting device 2 at the other end of the reinforced pier 1 through the second anchor, and is tensioned and pre-tightened; in this embodiment, there are two spirally arranged steel wire ropes 4, each of which is spirally wrapped around the reinforced pier 1, and the opposite ends of each spirally arranged steel wire rope 4 are respectively connected to the connecting devices 2 at the upper and lower ends of the reinforced pier 1.

[0055] Step 6: tensioning and anchoring: the opposite ends of the spirally arranged steel wire rope 4 and the second anchor are simultaneously tensioned and anchored in place.

[0056] The present invention's circumferential prestressing method secures the connecting device 2 to the surface of the reinforced pier 1 using an adhesive, circumferentially arranged steel wire ropes 3, and a first anchor. This ensures a stable connection between the connecting device 2 and the reinforced pier 1 without damaging the surface quality of the reinforced pier 1, reducing the likelihood of cracking. The circumferentially arranged steel wire ropes 3 and the first anchor can also reinforce and repair cracks in the reinforced pier 1, improving the quality of the reinforcement and repair. Furthermore, by using a spiral arrangement of steel wire ropes 4 and a second anchor, two sets of the second anchor can form multiple turns of steel wire rope for circumferential tensioning and reinforcement, reducing the number of anchors required and optimizing the tensioning and reinforcement structure. The symmetrical spiral arrangement of the steel wire ropes 4 and the second anchor also improves tensioning stability.

[0057] Although the present invention has been described in detail above using specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made based on the present invention. Therefore, such modifications or improvements, which do not depart from the spirit of the present invention, are intended to fall within the scope of protection claimed herein.

Claims

1. A method for constructing hoop-prestressed steel wire ropes, characterized in that: The following steps are involved: Step 1, construction preparation: prepare two connecting devices, each of which has a bonding surface, and select the upper and lower ends of the reinforced pier as the layout positions of the connecting devices; Step 2: Applying adhesive: Clean the layout position and apply adhesive; Clean the bonding surface of the connecting device and apply adhesive; Step 3, bonding the connecting device: bonding the bonding surfaces of the connecting device to the layout positions respectively, and temporarily fixing them with a temporary fixing tool; Step 4: Installing the hoop-arranged steel wire rope and the first anchor: Passing the hoop-arranged steel wire rope around the reinforced pier, and connecting the opposite ends of the hoop-arranged steel wire rope to the connecting device through the first anchor respectively, and then tensioning and anchoring, and then removing the temporary fixing tool; Step 5: Install the spirally arranged steel wire rope and the second anchor: Each spirally arranged steel wire rope is spirally wound around the reinforced bridge pier, and the opposite ends of each spirally arranged steel wire rope are respectively connected to the connecting devices at the upper and lower ends of the reinforced bridge pier. One end of the spirally arranged steel wire rope is connected to the connecting device at one end of the reinforced bridge pier through the second anchor and is tensioned and pre-tightened; the other end of the spirally arranged steel wire rope is spirally wound around the reinforced bridge pier, and is connected to the connecting device at the other end of the reinforced bridge pier through the second anchor and is tensioned and pre-tightened. Step six, tensioning and anchoring: the opposite ends of the spirally arranged steel wire rope and the second anchor are simultaneously tensioned and anchored in place.

2. A steel wire rope hoop prestressing construction method according to claim 1, characterized in that: In step 1, the layout position is located on the same plane as the reinforced pier.

3. A steel wire rope hoop prestressing construction method according to claim 1, characterized in that: In step 1, the layout positions are located on different planes of the reinforced piers.

4. A steel wire rope hoop prestressing construction method according to claim 1, characterized in that: In step 2, the adhesive is steel adhesive.

5. A steel wire rope hoop prestressing construction method according to claim 1, characterized in that: In step three, the temporary fixing tool is a supporting plate.

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