阅读说明：本技术 一种基于bim技术的连续梁0号块施工质量控制方法 (Construction quality control method for continuous beam No. 0 block based on BIM technology ) 是由 胡勇 石磊 李波 郭红斌 马剑 魏海明 杨瑞 赵金龙 何心德 侯鹏 于 2019-09-09 设计创作，主要内容包括：本发明提供一种基于BIM技术的连续梁0号块施工质量控制方法,包括以下步骤：步骤(1).钢筋定位：应用BIM技术调整钢筋间距,确定角钢卡槽的精确位置；支座钢筋网片共三层,步骤(2).锚垫板定位：锚盒采用钢板制作,工厂化精确加工,提高了锚盒的刚度,防止因锚盒变形造成锚垫板偏位,步骤(3).应力管道定位：步骤(4).混凝土多孔定点振捣：通过优化钢筋间距,在顶板竖向、底板倒角预置振捣通道及在过人孔预留天窗措施进行多孔定点振捣。本发明优化钢筋及预力应管道间距,增设混凝土振捣通道,有效解决0号块施工中存在的质量问题,所需工装采用钢筋、角钢及钢板,具有加工轻便、成本低、操作简单等特点,具有非常高的推广价值。(The invention provides a construction quality control method of a No. 0 block of a continuous beam based on a BIM technology, which comprises the following steps: step (1), positioning the steel bars: adjusting the interval of the steel bars by using a BIM technology, and determining the accurate position of the angle steel clamping groove; three layers of support steel bar meshes, and step (2) positioning an anchor backing plate: the anchor box adopts the steel sheet preparation, and the accurate processing of batch production has improved the rigidity of anchor box, prevents to cause the deviation of anchor backing plate because of the anchor box warp, step (3). Step (4), concrete porous fixed-point vibration: through optimizing the steel bar interval, preset the channel of vibrating in the vertical of roof, bottom plate chamfer and pass the manhole and reserve the skylight measure and carry out porous fixed point vibration. The invention optimizes the space between the steel bars and the prestress pipeline, adds the concrete vibration channel, effectively solves the quality problem in the construction of the No. 0 block, adopts the steel bars, the angle steels and the steel plates as the required tools, has the characteristics of light processing, low cost, simple operation and the like, and has very high popularization value.)

1. A construction quality control method of a continuous beam No. 0 block based on a BIM technology is characterized by comprising the following steps: the method comprises the following steps:

step (1), positioning the steel bars: adjusting the interval of the steel bars by using a BIM technology, and determining the accurate position of the angle steel clamping groove; three layers of support steel bar meshes;

step (2), positioning of an anchor backing plate: the anchor box is made of steel plates, is accurately processed in a factory, improves the rigidity of the anchor box, prevents the deviation of the anchor backing plate caused by the deformation of the anchor box, is integrally hoisted by bolting the anchor backing plate and the anchor box as well as the anchor box and the end die by bolts, and realizes the accurate positioning of the anchor backing plate by accurately positioning the end die;

step (3), stress pipeline positioning: the end die adopts factory-made steel plates with the thickness of 1cm, and the deviation of reserved holes of the pipeline is ensured to be not more than 2 mm; performing collision inspection on the steel bars and the prestressed pipeline by using BIM modeling, and adjusting the intervals of the steel bars in time; according to a BIM model, combining with a collision inspection condition, acquiring coordinates of the sections of all pipelines according to a vertical integral section with a straight line section of 50cm and a curved line section of 30cm, and accurately calculating the relative positions of different pipelines on the same section; accurately processing an integral # -shaped frame with a corresponding section according to the intercepted pipeline coordinates, wherein the clearance between the # -shaped hole steel bars and the pipeline is not more than 2 mm; determining the relative position of a # -shaped positioning frame by taking the end die, the side die and the bottom die as reference surfaces, and welding and fixing the # -shaped positioning frame and the steel reinforcement framework; the accurate positioning of the prestressed pipeline installation is realized by accurately installing the # -shaped positioning frame and the end die;

step (4), concrete porous fixed-point vibration: through optimizing the steel bar interval, preset the channel of vibrating in the vertical of roof, bottom plate chamfer and pass the manhole and reserve the skylight measure and carry out porous fixed point vibration.

2. The construction quality control method of the continuous beam No. 0 block based on the BIM technology as claimed in claim 1, characterized in that: in the step (1), the distance between the steel bars and the layer distance are positioned by adopting an angle steel fixture, are fixed by short steel bars, and are welded with each layer of net sheets in a spot welding mode according to the distance of 60cm, so that the layer distance is ensured to be 10 cm; the end mould adopts the factory-made steel sheet of 1cm thick, and the hole site is according to the linear cutting of reinforcing bar interval after optimizing, through the cutting precision of control hole site, realizes the accurate positioning of vertical horizontal reinforcing bar, and horizontal reinforcing bar interval adopts the fixture location, and the vertical main muscle of web adopts the steel pipe of assisting behind the accurate location of fixture to fix, demolishs the steel pipe when following concrete placement.

3. The construction quality control method of the continuous beam No. 0 block based on the BIM technology as claimed in claim 1 or 2, wherein: the concrete porous fixed-point vibration comprises the following steps: a. arranging a string of cylinders, b, presetting a vibrating channel, and c, pouring concrete.

4. The construction quality control method of the continuous beam No. 0 block based on the BIM technology as claimed in claim 3, characterized in that: the stringing barrel is arranged: in the binding process of the steel bars, steel pipe blanking string cylinders with the outer diameter of 100mm are pre-embedded along a beam face web plate area; the reinforcing mesh zones on the upper part of the support are arranged in an encrypted manner, and the reinforcing mesh zones are longitudinally arranged from the position of the transverse partition plate to two sides once every 1-3 m; the distance between the string cylinder and the bottom plate is 0.4m, and a small concrete hopper is arranged at the top end of the string cylinder.

5. The construction quality control method of the continuous beam No. 0 block based on the BIM technology as claimed in claim 3, characterized in that: presetting the vibration channel: arranging steel pipes with the outer diameter of 70mm at a top plate position right above a support reinforcing mesh dense area as a vertical vibrating channel and a blanking channel, wherein the distance is 50cm, the vibrating radius of 50 vibrating rods is 30-50 cm, and the vibrating channels are arranged at the distance of 50cm to ensure that the action ranges of the vibrating rods are mutually overlapped; the bottom of the steel mesh is 20cm away from the upper layer of the support, the steel mesh is limited by the steel bar in the shape of the Chinese character 'jing', and the top of the steel mesh is fixed by a self-made clamp; 22 steel pipe channels of 7cm are arranged at the positions of 2 supports, and the discharging string cylinder is also used as a vertical vibrating channel; arranging steel pipe channels with the outer diameter of 7cm at the bottom chamfer of the inner cavity at intervals of 1 m; the manhole bottom plate is crossed and 6 windows are opened, and the vibrator is conveniently transferred to assist in vibrating.

6. The construction quality control method of the continuous beam No. 0 block based on the BIM technology as claimed in claim 3, characterized in that: pouring the concrete: the concrete is fed into the mould by the pipe through the pre-feeding pipe, and the feeding in the box chamber is assisted, so that the concrete is prevented from being separated; the concrete near the bottom web plate and the support is mainly vertically inserted and vibrated through a reserved channel of a top plate, and is supplemented with an inner cavity bottom chamfer preset channel and a reserved window of a manhole for multi-hole fixed-point vibration; 12 vibrating rods are averagely distributed on site according to the operating radius of the vibrating rods, so that the operating link of workers for moving the vibrating rods is saved, and the vibrating efficiency is improved; the chamfer angle at the bottom of the inner cavity assists the inclined insertion vibration, so that the problem that the concrete in the chamfer angle area is not easy to vibrate close to the template is solved; concrete at the lower part of the diaphragm plate is transferred through the manhole bottom plate window to be vibrated by the vibrator, so that the problem that the concrete in the area is not easy to be compacted by vibration is effectively solved.

Technical Field

The invention relates to the technical field of railway continuous beam construction, in particular to a construction quality control method of a continuous beam No. 0 block based on a BIM technology.

Background

In the construction process of the railway cantilever casting continuous beam, the No. 0 block is a section with the most complex structure, the most dense prestressed reinforcement and the largest construction difficulty, the construction quality of the No. 0 block directly relates to the overall structure and the driving safety of a bridge, but the construction quality control of the No. 0 block is always a technical difficulty, and the traditional construction process is easy to have the quality problems of non-compact bottom plate concrete vibration, inaccurate prestressed pipeline positioning, inclined anchor backing plate, deflection of an anchor and the like.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a construction quality control method of a No. 0 block of a continuous beam based on a BIM technology, so as to solve the problems in the background technology.

The technical problem solved by the invention is realized by adopting the following technical scheme: a construction quality control method of a continuous beam No. 0 block based on a BIM technology comprises the following steps:

step (1), positioning the steel bars: adjusting the interval of the steel bars by using a BIM technology, and determining the accurate position of the angle steel clamping groove; the support steel bar net sheets have three layers,

step (2), positioning of an anchor backing plate: the anchor box is made of steel plates, is accurately processed in a factory, improves the rigidity of the anchor box, prevents the deviation of the anchor backing plate caused by the deformation of the anchor box, is integrally hoisted by bolting the anchor backing plate and the anchor box as well as the anchor box and the end die by bolts, and realizes the accurate positioning of the anchor backing plate by accurately positioning the end die;

step (3), stress pipeline positioning: the end die adopts factory-made steel plates with the thickness of 1cm, and the deviation of reserved holes of the pipeline is ensured to be not more than 2 mm; performing collision inspection on the steel bars and the prestressed pipeline by using BIM modeling, and adjusting the intervals of the steel bars in time; according to a BIM model, combining with a collision inspection condition, acquiring coordinates of the sections of all pipelines according to a vertical integral section with a straight line section of 50cm and a curved line section of 30cm, and accurately calculating the relative positions of different pipelines on the same section; accurately processing an integral # -shaped frame with a corresponding section according to the intercepted pipeline coordinates, wherein the clearance between the # -shaped hole steel bars and the pipeline is not more than 2 mm; determining the relative position of a # -shaped positioning frame by taking the end die, the side die and the bottom die as reference surfaces, and welding and fixing the # -shaped positioning frame and the steel reinforcement framework; the accurate positioning of the prestressed pipeline installation is realized by accurately installing the # -shaped positioning frame and the end die;

step (4), concrete porous fixed-point vibration: through optimizing the steel bar interval, preset the channel of vibrating in the vertical of roof, bottom plate chamfer and pass the manhole and reserve the skylight measure and carry out porous fixed point vibration.

In the step (1), the distance between the steel bars and the layer distance are positioned by adopting an angle steel fixture, are fixed by short steel bars, and are welded with each layer of net sheets in a spot welding mode according to the distance of 60cm, so that the layer distance is ensured to be 10 cm; the end die is made of factory-made steel plates with the thickness of 1cm, hole sites are cut linearly according to the optimized steel bar spacing, accurate positioning of longitudinal horizontal steel bars is achieved by controlling cutting accuracy of the hole sites, transverse horizontal steel bar spacing is positioned by fixtures, the vertical main ribs of the web plates are fixed by steel pipes after being accurately positioned by the fixtures, and the steel pipes are removed when concrete is poured;

the concrete porous fixed-point vibration comprises the following steps: a. arranging a string of cylinders, b, presetting a vibrating channel, and c, pouring concrete.

The stringing barrel is arranged: in the binding process of the steel bars, steel pipe blanking string cylinders with the outer diameter of 100mm are pre-embedded along a beam face web plate area; the reinforcing mesh zones on the upper part of the support are arranged in an encrypted manner, and the reinforcing mesh zones are longitudinally arranged from the position of the transverse partition plate to two sides once every 1-3 m; the distance between the string cylinder and the bottom plate is 0.4m, and a small concrete hopper is arranged at the top end of the string cylinder.

Presetting the vibration channel: arranging steel pipes with the outer diameter of 70mm at a top plate position right above a support reinforcing mesh dense area as a vertical vibrating channel and a blanking channel, wherein the distance is 50cm, the vibrating radius of 50 vibrating rods is 30-50 cm, and the vibrating channels are arranged at the distance of 50cm to ensure that the action ranges of the vibrating rods are mutually overlapped; the bottom of the steel mesh is 20cm away from the upper layer of the support, the steel mesh is limited by the steel bar in the shape of the Chinese character 'jing', and the top of the steel mesh is fixed by a self-made clamp; 22 steel pipe channels of 7cm are arranged at the positions of 2 supports, and the discharging string cylinder is also used as a vertical vibrating channel; arranging steel pipe channels with the outer diameter of 7cm at the bottom chamfer of the inner cavity at intervals of 1 m; the manhole bottom plate is crossed and 6 windows are opened, and the vibrator is conveniently transferred to assist in vibrating.

Pouring the concrete: the concrete is fed into the mould by the pipe through the pre-feeding pipe, and the feeding in the box chamber is assisted, so that the concrete is prevented from being separated; the concrete near the bottom web plate and the support is mainly vertically inserted and vibrated through a reserved channel of a top plate, and is supplemented with an inner cavity bottom chamfer preset channel and a reserved window of a manhole for multi-hole fixed-point vibration; 12 vibrating rods are averagely distributed on site according to the operating radius of the vibrating rods, so that the operating link of workers for moving the vibrating rods is saved, and the vibrating efficiency is improved; the chamfer at the bottom of the inner cavity assists the inclined insertion vibration, and the problem that the concrete in a chamfer area is not easy to vibrate close to the template is solved. Concrete at the lower part of the diaphragm plate is transferred through the manhole bottom plate window to be vibrated by the vibrator, so that the problem that the concrete in the area is not easy to be compacted by vibration is effectively solved.

Compared with the prior art, the invention has the beneficial effects that: the invention optimizes the space between the steel bars and the prestress pipeline, adds the concrete vibration channel, effectively solves the quality problem in the construction of the No. 0 block, adopts the steel bars, the angle steels and the steel plates as the required tools, has the characteristics of light processing, low cost, simple operation and the like, and has very high popularization value.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Fig. 2 is a schematic structural view of the angle steel fixture tool of the present invention.

FIG. 3 is a schematic view of the steel end mold tooling structure of the present invention.

Fig. 4 is a schematic structural view of the tool for the # -shaped positioning frame of the prestressed pipeline.

Fig. 5 is a schematic structural view of the multi-hole fixed-point vibrating tool of the invention.

Detailed Description

In the description of the present invention, it should be noted that unless otherwise specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

As shown in fig. 1 to 5, a construction quality control method for a continuous beam No. 0 block based on a BIM technology includes the following steps:

step (1), positioning the steel bars: adjusting the interval of the steel bars by using a BIM technology, and determining the accurate position of the angle steel clamping groove; the support steel bar net sheets are three layers, the steel bar intervals and the layer distances are positioned by adopting angle steel clamps, are fixed by short steel bars, and are welded with each layer of net sheets in a spot welding mode according to the interval of 60cm, so that the layer distance is guaranteed to be 10 cm; the end die is made of factory-made steel plates with the thickness of 1cm, hole sites are cut linearly according to the optimized steel bar spacing, accurate positioning of longitudinal horizontal steel bars is achieved by controlling cutting accuracy of the hole sites, transverse horizontal steel bar spacing is positioned by fixtures, the vertical main ribs of the web plates are fixed by steel pipes after being accurately positioned by the fixtures, and the steel pipes are removed when concrete is poured;

step (2), positioning of an anchor backing plate: the anchor box is made of steel plates, is accurately processed in a factory, improves the rigidity of the anchor box, prevents the deviation of the anchor backing plate caused by the deformation of the anchor box, is integrally hoisted by bolting the anchor backing plate and the anchor box as well as the anchor box and the end die by bolts, and realizes the accurate positioning of the anchor backing plate by accurately positioning the end die;

step (3), stress pipeline positioning: the end die adopts factory-made steel plates with the thickness of 1cm, and the deviation of reserved holes of the pipeline is ensured to be not more than 2 mm; performing collision inspection on the steel bars and the prestressed pipeline by using BIM modeling, and adjusting the intervals of the steel bars in time; according to a BIM model, combining with a collision inspection condition, acquiring coordinates of the sections of all pipelines according to a vertical integral section with a straight line section of 50cm and a curved line section of 30cm, and accurately calculating the relative positions of different pipelines on the same section; accurately processing an integral # -shaped frame with a corresponding section according to the intercepted pipeline coordinates, wherein the clearance between the # -shaped hole steel bars and the pipeline is not more than 2 mm; determining the relative position of a # -shaped positioning frame by taking the end die, the side die and the bottom die as reference surfaces, and welding and fixing the # -shaped positioning frame and the steel reinforcement framework; the accurate positioning of the prestressed pipeline installation is realized by accurately installing the # -shaped positioning frame and the end die;

step (4), concrete porous fixed-point vibration: through optimizing the steel bar interval, preset the channel of vibrating in the vertical of roof, bottom plate chamfer and pass the manhole and reserve the skylight measure and carry out porous fixed point vibration.

The concrete porous fixed-point vibration comprises the following steps:

a. arranging a string cylinder: in the binding process of the steel bars, steel pipe blanking string cylinders with the outer diameter of 100mm are pre-embedded along a beam face web plate area; the reinforcing mesh zones on the upper part of the support are arranged in an encrypted manner, and the reinforcing mesh zones are longitudinally arranged from the position of the transverse partition plate to two sides once every 1-3 m. The distance between the string cylinder and the bottom plate is 0.4m, and a small concrete hopper is arranged at the top end of the string cylinder;

b. presetting a vibrating channel: arranging steel pipes with the outer diameter of 70mm at a top plate position right above a support reinforcing mesh dense area as a vertical vibrating channel and a blanking channel, wherein the distance is 50cm, the vibrating radius of 50 vibrating rods is 30-50 cm, and the vibrating channels are arranged at the distance of 50cm to ensure that the action ranges of the vibrating rods are mutually overlapped; the bottom of the steel mesh is 20cm away from the upper layer of the support, the steel mesh is limited by the steel bar in the shape of the Chinese character 'jing', and the top of the steel mesh is fixed by a self-made clamp; 22 steel pipe channels of 7cm are arranged at the positions of 2 supports, and the discharging string cylinder is also used as a vertical vibrating channel; arranging steel pipe channels with the outer diameter of 7cm at the bottom chamfer of the inner cavity at intervals of 1 m; 6 windows are formed in the bottom plate of the manhole, so that a vibrator can be conveniently placed to assist in vibrating;

c. pouring concrete: the concrete is fed into the mould by the pipe through the pre-feeding pipe, and the feeding in the box chamber is assisted, so that the concrete is prevented from being separated; the concrete near the bottom web plate and the support is mainly vertically inserted and vibrated through a reserved channel of a top plate, and is supplemented with an inner cavity bottom chamfer preset channel and a reserved window of a manhole for multi-hole fixed-point vibration; 12 vibrating rods are averagely distributed on site according to the operating radius of the vibrating rods, so that the operating link of workers for moving the vibrating rods is saved, and the vibrating efficiency is improved; the chamfer at the bottom of the inner cavity assists the inclined insertion vibration, and the problem that the concrete in a chamfer area is not easy to vibrate close to the template is solved. Concrete at the lower part of the diaphragm plate is transferred through the manhole bottom plate window to be vibrated by the vibrator, so that the problem that the concrete in the area is not easy to be compacted by vibration is effectively solved.

And determining a support mesh encryption area. Drawing a plane, a longitudinal plane and a section diagram of the support according to a design drawing, determining a steel bar dense area in multiple directions, and performing a review by adopting BIM modeling. And determining template windowing parameters. The template windowing position is determined by the drawing and BIM visualization technology and by combining the safety and the applicability of field construction, and 6 windows are arranged. And (6) installing the template. The templates are assembled into blocks under the piers, polishing and painting a release agent are carried out after the assembling is finished, and a tower crane is adopted to convey the blocks to the pier tops for installation, so that the overhead working time is reduced, and the assembling quality of the templates is improved. And (5) installing the steel bars. The steel bars are processed and manufactured in a centralized manner in a steel bar processing field according to design drawings, and the steel bars with collision are bent and formed in the field in advance and then are transported to the field for binding. Presetting a vibrating rod for positioning. When the reinforcing steel bars are bound, a preset vibrating rod channel is fixed at a preset position by a simple arc-shaped fixture. And (6) pouring concrete. Pumping, distributing materials in a cylinder, symmetrically and continuously pouring longitudinally and transversely, starting the vibrating rod when the support is at a dense position of the reinforcing steel bars, and sequentially pulling out the vibrating rod and the channel; 2 vibrators are additionally arranged on one side of the vibrating blind area of the middle fulcrum template widening area, so that the concrete is guaranteed to be vibrated compactly. The inserting points of the vibrating rods are uniformly arranged, the vibrating time is controlled to be 20-30s, and when the vibrating rods are used, attention needs to be paid to avoiding collision with reinforcing steel bars, embedded parts and the like as far as possible. And (4) manually finishing the concrete of the beam top plate after the concrete is vibrated, and finally finishing the surface.

The angle steel clamp and the end die are both formed by accurately processing the steel bar spacing according to the final steel bar spacing after adjusting the steel bar spacing through the BIM model, and the accurate positioning of the steel bar can be realized; the anchor box is modeled by BIM and processed in a factory, the rigidity of the anchor box is far superior to that of a traditional wooden structure, and the anchor box is integrally hoisted by bolting with the anchor backing plate and the end template by using bolts, so that the anchor backing plate can be accurately positioned; processing a whole-section integral rigid derrick through the optimized BIM model, welding and fixing the derrick and the steel reinforcement framework, and realizing accurate positioning of the prestressed pipeline through accurate installation; through adjusting the interval of the prestressed pipelines, the vertical direction of the top plate and the chamfer angle of the bottom plate are preset with vibration channels, and skylight is reserved in the manhole to vibrate the porous fixed point. The concrete is guaranteed to be vibrated compactly. The required tool adopts the steel bar, the angle steel and the steel plate, has the characteristics of light processing, low cost, simple operation and the like, and has very high popularization value.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.