Construction method of steel structure bridge appearance modeling UHPC board waterproof structure

Abstract

The invention relates to a construction method of a steel structure bridge appearance modeling UHPC board waterproof structure. The construction method comprises the steps that firstly, the parting position of a UHPC board is determined, and construction preparation is conducted; 2, trimming a UHPC board seam and cleaning a base layer; 3, construction of a butyl rubber waterproof sealing adhesive tape; 4, constructing a backing material; fifthly, polyurea grouting liquid is adopted for construction joint glue injection construction; and sixthly, polyurethane sealant construction is conducted. The UHPC construction joint is free of water leakage; in addition, the overall appearance effect of the bridge is good; the effective waterproof age limit is prolonged, and the waterproof defect caused by aging of a single-structure material is overcome; repeated water leakage and repeated maintenance are greatly reduced, the construction cost is reduced, and the construction quality of engineering finished products is greatly improved; the bonding material of the construction joint is not easy to break under the influence of dynamic load; waterproof materials are convenient to obtain, the construction process is simple, and technical control requirements are low.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method for a UHPC board waterproof structure of a steel structure bridge appearance. Background Art

[0002] In building construction projects, construction joints are usually waterproofed by internal joint sections, waterproofing the water-facing surface, using polyurethane sealants, and water-expanding waterstops. However, there are many shortcomings in the waterproofing construction method for UHPC board construction joints: First, the fixing method is permanent anchoring, which will limit the function of the construction joint, and the overall force and expansion deformation of the UHPC is limited, which makes on-site assembly construction more difficult; second, the waterproof parts of the materials are easily damaged and unsightly, and the construction joints of the UHPC board facing the water are prone to cracking; third, backing materials are required, which are easy to loosen and the construction joints are prone to water seepage; most importantly, due to the need to bear traffic loads, it will cause vibration to the steel structure bridge, and when the seasonal temperature difference is large, the deformation size of the steel structure bridge is large, which has a greater impact on the waterproof quality of the UHPC board construction joint.

[0003] Therefore, how to provide a construction method for a waterproof structure of a UHPC board for the exterior shape of a steel structure bridge is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] Aiming at the problem that the construction joint of the UHPC plate for the appearance of steel structure bridge is easy to deform and seep under the dynamic load condition, a construction method of the waterproof structure of the UHPC plate for the appearance of steel structure bridge is provided, which can effectively prevent the leakage of the construction joint.

[0005] In order to solve the above technical problems, the present invention includes the following technical solutions:

[0006] A construction method for a UHPC board waterproof structure for a steel structure bridge appearance, the construction method comprising the following steps:

[0007] Step S1, determine the location of the UHPC board joints and construction preparation: use a scanner to perform all-round scanning, measurement and setting out, site cleaning and equipment entry; perform preliminary waterproofing treatment on the UHPC board construction joints; calculate and determine the load and strength parameters based on the relevant parameters of the UHPC board system: determine the overall retention width of the UHPC board construction joints based on the expansion and contraction deformation size of the steel structure bridge affected by temperature;

[0008] Step S2, trimming the UHPC board seams and cleaning the base: trimming the parts with uneven width of the construction joints to ensure that the surface of the construction joints is flat, smooth and crack-free, and sticking anti-fouling strips on both sides of the UHPC board seams to cover and protect the UHPC boards;

[0009] Step S3, construction of butyl rubber waterproof sealing adhesive tape;

[0010] Step S4, backing material construction: make the backing material diameter larger than the construction joint by a certain range, install the backing material and the butyl rubber waterproof sealing adhesive tape, and leave a certain distance, and the backing material is embedded firmly and uninterruptedly;

[0011] Step S5, using polyurea grouting liquid to perform glue injection construction at the construction joint;

[0012] Step S6, polyurethane sealant construction: apply polyurethane sealant to the parts of the UHPC board that need to be sealed, and then remove the anti-fouling strips.

[0013] Furthermore, the step S1 includes: adjusting the plate seam of the UHPC plate within the allowable error range of elevation and verticality so that the plate seam width of the UHPC plate is maintained at 15 mm.

[0014] Furthermore, the scanner in step S1 is a Focus3DX330 high-speed three-dimensional scanner.

[0015] Furthermore, the step S2 comprises: grinding the periphery of the construction joint with a grinder, and then removing surface debris, laitance and loose materials with a brush or compressed air.

[0016] Further, the step S3 comprises: wiping the construction joint of the UHPC board clean, using a 50 mm wide single-sided aluminum foil tape, pasting the single-sided aluminum foil tape on the construction joint, and pressing it in sequence to make it firmly bonded, and attaching the butyl waterproof tape to the back of the construction joint of the UHPC board; starting from one end, gradually attaching the tape to ensure that the tape fits tightly to the surface without bubbles or wrinkles; using the palm or roller tool to make the tape contact the surface of the construction joint; when connecting, overlapping the two adjacent sections of tape by 5 to 10 cm, and ensuring that there is no gap between the two sections of tape, ensuring that the edge parts fit tightly without cracks or gaps; using the palm or roller tool to gently press the butyl waterproof tape to ensure that it is completely bonded to the surface to compact the tape; after the construction is completed, carefully check the fit of the butyl waterproof tape; if any loose, cracked or damaged parts are found, they should be repaired or replaced in time.

[0017] Furthermore, the step S4 comprises: filling the plate seams of the UHPC plate with a backing foam rod with a diameter of 20 mm, and strictly controlling the embedding depth.

[0018] Furthermore, the step S5 includes: injecting the polyurea grouting liquid from the bottom to the top, first injecting the vertical seams and then the horizontal seams, slowing down the injection speed at the cross-intersection position, controlling the injection angle of the electric glue gun to about 60 degrees, and maintaining a uniform injection speed.

[0019] Furthermore, the step S6 includes: after applying the glue, smoothing the sealant with a scraper or fingers to fill it into the construction joint, and ensuring that the sealant is in full contact with the substrate, and compacting the smoothed sealant with a scraper or fingers to remove air and excess sealant; after the joint surface is modified and the glue injection is completed, in order to ensure the density of the glue injection in the joint, use a scraper to press and smooth it for the first time in the opposite direction of the glue injection, and then modify the joint surface to ensure its aesthetics.

[0020] Furthermore, a convex tool made of hard plastic strips is used for surface finishing to ensure that the surface of the sealant is smooth, beautiful and full. The sealant should not be touched within 48 hours after the skin is formed.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] The present invention provides a construction method for a UHPC board waterproof structure for the exterior shape of a steel structure bridge, and the construction method includes: 1. determining the position of the UHPC board joint and construction preparation; 2. trimming the UHPC board joint and cleaning the base layer; 3. construction of butyl rubber waterproof sealing adhesive tape; 4. construction of backing material; 5. construction of construction joint glue injection using polyurea grouting liquid; and 6. construction of polyurethane sealant. The UHPC board waterproof structure for the exterior shape of a steel structure bridge of the present invention has good dynamic load test results under water spraying and roadway driving conditions, and there is no water leakage in the UHPC construction joint; moreover, the overall appearance of the bridge is better; the effective waterproof life is extended, and the aging waterproof drawbacks of a single structural material are solved; repeated water leakage and repeated maintenance are greatly reduced, the construction cost is reduced, and the construction quality of the finished project is greatly improved; the construction joint bonding material is not easy to break under the influence of dynamic load; the waterproof material is easy to obtain, the construction process is simple, and the technical control requirements are low. DETAILED DESCRIPTION

[0023] The following is a further detailed description of a construction method of a UHPC board waterproof structure for a steel structure bridge exterior provided by the present invention in conjunction with a specific embodiment. The advantages and features of the present invention will become more apparent from the following description.

[0024] Embodiment 1

[0025] The construction method of the UHPC board waterproof structure of the steel structure bridge appearance modeling of the present invention is described in detail below.

[0026] A construction method for a UHPC board waterproof structure for a steel structure bridge appearance, the construction method comprising the following steps:

[0027] Step S1, determine the location of the UHPC board joints and construction preparation: personnel enter the site, use a scanner to perform a full range of scanning, measurement and setting out, site cleaning, and equipment entry; perform preliminary waterproofing on the UHPC board construction joints; calculate and determine the load and strength parameters based on the relevant parameters of the UHPC board system: determine the overall retention width of the UHPC board construction joints based on the expansion and contraction deformation size of the steel structure bridge affected by temperature;

[0028] Step S2, trimming the UHPC board seams and cleaning the base: trimming the parts with uneven width of the construction joints to ensure that the surface of the construction joints is flat, smooth and crack-free, and pasting anti-fouling strips on both sides of the UHPC board seams to cover and protect the UHPC boards, and then removing them after the sealing paste on both sides of the construction joints is trimmed;

[0029] Step S3, construction of butyl rubber waterproof sealing adhesive tape;

[0030] Step S4, backing material construction: make the backing material diameter larger than the construction joint by a certain range, for example, the backing material diameter can be selected to be 5 cm larger than the construction joint, install the backing material and the butyl rubber waterproof sealing adhesive tape, and leave a certain distance, for example, the backing material and the butyl rubber waterproof sealing adhesive tape leave a distance of 2 cm, and the backing material is embedded firmly and uninterruptedly;

[0031] Step S5, using polyurea grouting liquid to perform glue injection construction at the construction joint;

[0032] Step S6, polyurethane sealant construction: apply polyurethane sealant to the parts of the UHPC board that need to be sealed, and then remove the anti-fouling strips.

[0033] Specifically, this embodiment adopts a construction method of splitting and dividing blocks. The main construction method is the splitting of 3.0Mx3.0M plates of UHPC styling panels for steel structure bridges. The splitting line is also a kind of arc beauty, which can better fit the shape of the UHPC panel itself, making the appearance more beautiful. The on-site assembly process has also been simplified, and the safety risks of each process are controllable. The UHPC panel has fewer splits and better waterproof effects, and can provide users with better comfort. The present invention comprehensively considers the entire construction process, accurately splits and divides the construction process, and comprehensively considers the profit cost to achieve the optimal appearance beautification, and can also effectively calculate the load borne by the component under the most unfavorable working conditions.

[0034] In this embodiment, more preferably, the step S1 includes: adjusting the plate seam of the UHPC plate within the allowable error range of elevation and verticality so that the plate seam width of the UHPC plate is maintained at 15 mm.

[0035] In this embodiment, more preferably, the scanner in step S1 is a Focus3DX330 high-speed three-dimensional scanner.

[0036] In this embodiment, more preferably, step S2 includes: grinding the periphery of the construction joint with a grinder, and then removing surface debris, laitance and loose materials with a brush or compressed air.

[0037] In this embodiment, more preferably, step S3 comprises: wiping the construction joint of the UHPC board clean, using a 50 mm wide single-sided aluminum foil tape, pasting the single-sided aluminum foil tape on the construction joint, and pressing in sequence to make it firmly bonded, and attaching the butyl waterproof tape to the back of the construction joint of the UHPC board; starting from one end, gradually attaching the tape to ensure that the tape fits tightly to the surface without bubbles or wrinkles; using the palm or roller tool to make the tape contact the surface of the construction joint; when connecting, overlapping the two adjacent sections of tape by 5 to 10 cm, and ensuring that there is no gap between the two sections of tape, and ensuring that the edge parts fit tightly without cracks or gaps; using the palm or roller tool to gently press the butyl waterproof tape to ensure that it is fully bonded to the surface to compact the tape and improve the waterproof performance; after the construction is completed, carefully check the fit of the butyl waterproof tape; if any loose, cracked or damaged parts are found, they should be repaired or replaced in time.

[0038] In this embodiment, more preferably, the step S4 comprises: filling the board joints of the UHPC board with a backing foam rod with a diameter of 20 mm, and strictly controlling the embedding depth, and measuring the width and depth of the construction joint with a ruler.

[0039] In this embodiment, more preferably, step S5 includes: the polyurea grouting liquid is injected from the lower side to the upper side, the vertical seams are injected first and then the horizontal seams, the glue injection speed is slowed down at the cross position, the glue injection angle of the electric glue gun is controlled at about 60 degrees, and the glue injection speed is maintained at a uniform speed. The gear position of the electric glue gun can be controlled within 3 gears. When pressing the seams, the pressing speed must be slow and not thrown. At the same time, the angle between the pressing rod and the UHPC should not be too large. If the thickness is uneven during the construction process, the thick ends and the thin middle are also very easy to bulge.

[0040] In this embodiment, more preferably, step S6 includes: after applying the glue, smooth the sealant with a scraper or fingers to fill it into the construction joint, and ensure that the sealant is in full contact with the substrate, and compact the smoothed sealant with a scraper or fingers to remove air and excess sealant, pay attention to controlling the amount and uniformity of the glue, and ensure that the sealant can form a continuous, bubble-free thin layer to ensure the sealing effect; after the surface modification of the joint is completed, in order to ensure the compactness of the glue injection in the joint, use a scraper to press and smooth it in the opposite direction of the glue injection, and then modify the surface of the joint to ensure its aesthetics. After the sealant is filled and the primer is fully dried, generally about 0.5h, the specific time depends on the environment, cut the gun nozzle of the electric glue gun into 45°, and when squeezing the sealant, it should be squeezed out from the nozzle evenly and continuously, and move slowly and at a uniform speed to ensure that the joint is full of colloid.

[0041] When injecting glue into a "X" or "T" joint, sufficient amount of sealant should be injected at the joint, and then the glue should be pulled in other directions.

[0042] In this embodiment, more preferably, a hard plastic strip is used to make a convex tool for surface finishing to ensure that the surface of the sealant is smooth, beautiful and full. The sealant should not be touched within 48 hours after the sealant has formed a skin.

[0043] The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. The above embodiments only express several embodiments of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A construction method for a UHPC board waterproof structure for a steel structure bridge appearance, characterized in that: The construction method comprises the following steps: Step S1, determine the location of the UHPC board joints and construction preparation: use a scanner to perform all-round scanning, measurement and setting out, site cleaning and equipment entry; perform preliminary waterproofing treatment on the UHPC board construction joints; calculate and determine the load and strength parameters based on the relevant parameters of the UHPC board system: determine the overall retention width of the UHPC board construction joints based on the expansion and contraction deformation size of the steel structure bridge affected by temperature; Step S2, trimming the UHPC board seams and cleaning the base: trimming the parts with uneven width of the construction joints to ensure that the surface of the construction joints is flat, smooth and crack-free, and sticking anti-fouling strips on both sides of the UHPC board seams to cover and protect the UHPC boards; Step S3, construction of butyl rubber waterproof sealing adhesive tape; Step S4, backing material construction: make the backing material diameter larger than the construction joint by a certain range, install the backing material and the butyl rubber waterproof sealing adhesive tape, and leave a certain distance, and the backing material is embedded firmly and uninterruptedly; Step S5, using polyurea grouting liquid to perform glue injection construction at the construction joint; Step S6, polyurethane sealant construction: apply polyurethane sealant to the parts of the UHPC board that need to be sealed, and then remove the anti-fouling strips.

2. The construction method according to claim 1, characterized in that: The step S1 includes: adjusting the plate seam of the UHPC plate within the allowable error range of elevation and verticality so that the plate seam width of the UHPC plate is maintained at 15 mm.

3. The construction method according to claim 1, characterized in that: The scanner in step S1 is a Focus3DX330 high-speed three-dimensional scanner.

4. The construction method according to claim 1, characterized in that: The step S2 comprises: grinding the periphery of the construction joint with a grinder, and then removing surface debris, laitance and loose materials with a brush or compressed air.

5. The construction method according to claim 1, characterized in that: The step S3 comprises: wiping the construction joint of the UHPC board clean, using a 50 mm wide single-sided aluminum foil tape, pasting the single-sided aluminum foil tape on the construction joint, and pressing it in sequence to make it firmly bonded, and attaching the butyl waterproof tape to the back of the construction joint of the UHPC board; starting from one end, gradually attaching the tape to ensure that the tape is tightly attached to the surface without bubbles or wrinkles; using the palm or roller tool to make the tape contact the surface of the construction joint; when connecting, overlapping two adjacent sections of tape by 5 to 10 cm, and ensuring that there is no gap between the two sections of tape, and ensuring that the edge parts are tightly attached without cracks or gaps; using the palm or roller tool to gently press the butyl waterproof tape to ensure that it is completely bonded to the surface to compact the tape; after the construction is completed, carefully check the fit of the butyl waterproof tape; if any loose, cracked or damaged parts are found, they should be repaired or replaced in time.

6. The construction method according to claim 1, characterized in that: The step S4 comprises: The board seams of the UHPC board are filled with 20mm diameter backing foam rods, and the embedding depth is strictly controlled.

7. The construction method according to claim 1, characterized in that: The step S5 comprises: applying the polyurea grouting liquid from the bottom to the top, first applying the vertical seams and then the horizontal seams, slowing down the gluing speed at the cross-intersection position, controlling the gluing angle of the electric glue gun at about 60 degrees, and maintaining a uniform gluing speed.

8. The construction method according to claim 1, characterized in that: The step S6 comprises: after applying the glue, smoothing the sealant with a scraper or fingers to fill it into the construction joint, and ensuring that the sealant is in full contact with the substrate, and compacting the smoothed sealant with a scraper or fingers to remove air and excess sealant; after the joint surface is modified and the glue injection is completed, in order to ensure the density of the glue injection in the joint, the scraper is used to press and smooth it for the first time in the opposite direction of the glue injection, and then the joint surface is modified to ensure its aesthetics.

9. The construction method according to claim 8, characterized in that: Use a convex tool made of hard plastic strips to perform surface finishing to ensure that the surface of the sealant is smooth, beautiful and full. The sealant should not be touched within 48 hours after the skin is formed.