CN104213514B - A kind of earthing corrugated steel-concrete combination arch bridge add strong method - Google Patents
A kind of earthing corrugated steel-concrete combination arch bridge add strong method Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims description 20
- 239000004576 sand Substances 0.000 claims description 18
- 239000011384 asphalt concrete Substances 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 5
- 230000010412 perfusion Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 27
- 238000010276 construction Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 19
- 230000002787 reinforcement Effects 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
技术领域technical field
本发明属于覆土波纹钢板桥加强领域，具体涉及一种适用于覆土波纹钢板-混凝土组合拱桥的加强方法。The invention belongs to the field of reinforcement of soil-covered corrugated steel plate bridges, and in particular relates to a strengthening method suitable for soil-covered corrugated steel plate-concrete composite arch bridges.
背景技术Background technique
中、小桥涵在公路和铁路工程中占有重要的地位。而现今中、小桥涵绝大多数为钢筋混凝土及圬工结构。圬工及钢筋混凝土结构设计施工工期较长，且极易在运营阶段产生开裂、剥落、渗水、钢筋锈蚀等病害，严重地影响了中、小桥涵结构的安全性、适用性及耐久性。同时在后期维护加固上，甚至还要花费比新建桥涵更多的资金、人力。而与圬工及钢筋混凝土结构相比，覆土波纹钢板结构具有工程造价低、变形适应力强、耐久性好、施工方便、对环境扰动少的特点，被广泛运用在小跨径桥涵中，在膨胀土、软土及多年冻土地区具有广阔的应用前景。据研究表明，此种结构波纹钢板拱壳仅承受结构总荷载的30％左右，而其余部分均有其周围的土体承担，土及波纹钢板结构协同作用显著。对于很多覆土波纹钢板拱桥结构，因施工等各种原因，在其拱顶的覆土厚度不可能达到规范要求的最小高度。目前国内外修建的覆土波纹钢板拱桥跨径基本在10m～20m之间，亟需增大结构的跨越能力以扩大其应用范围，而增大跨径后，结构内力增加的问题就必须克服。Medium and small bridges and culverts play an important role in highway and railway engineering. And now, the vast majority of medium and small bridges and culverts are reinforced concrete and masonry structures. Masonry and reinforced concrete structures have a long design and construction period, and are prone to cracking, spalling, water seepage, steel corrosion and other diseases during the operation stage, which seriously affect the safety, applicability and durability of medium and small bridge and culvert structures. At the same time, in the later maintenance and reinforcement, it will even cost more funds and manpower than building new bridges and culverts. Compared with masonry and reinforced concrete structures, soil-covered corrugated steel plate structures have the characteristics of low engineering cost, strong deformation adaptability, good durability, convenient construction, and less environmental disturbance, and are widely used in small-span bridges and culverts. Expansive soil, soft soil and permafrost areas have broad application prospects. According to research, the corrugated steel plate arch shell of this structure only bears about 30% of the total structural load, while the rest is borne by the surrounding soil, and the synergy between the soil and the corrugated steel plate structure is remarkable. For many corrugated steel plate arch bridge structures covered with soil, due to various reasons such as construction, the thickness of the covered soil on the vault cannot reach the minimum height required by the code. At present, the spans of corrugated steel plate arch bridges built at home and abroad are basically between 10m and 20m. It is urgent to increase the spanning capacity of the structure to expand its application range. After increasing the span, the problem of increased internal force of the structure must be overcome.
发明内容Contents of the invention
本发明的目的在于针对现有中小桥涵耐久性差、施工周期长、造价高及现有覆土波纹钢板桥涵跨径较小、抗屈曲能力弱、抗震性能不强、拱顶填土高度不够等不足，提供一种覆土波纹钢板-混凝土组合拱桥的加强方法，通过加强结构、减少荷载两方面来克服上述中小桥涵及一般覆土波纹钢板桥的缺陷。The purpose of the present invention is to address the shortcomings of existing small and medium-sized bridges and culverts such as poor durability, long construction period, high cost, and existing soil-covered corrugated steel plate bridges and culverts with small spans, weak buckling resistance, weak seismic performance, and insufficient vault filling height. A method for strengthening a soil-covered corrugated steel plate-concrete composite arch bridge is provided, which overcomes the defects of the above-mentioned small and medium-sized bridges and culverts and general soil-covered corrugated steel plate bridges by strengthening the structure and reducing loads.
本发明的目的是通过以下技术方案来实现：一种覆土波纹钢板-混凝土组合拱桥的加强方法，该方法包括以下步骤：The object of the present invention is to realize by following technical scheme: a kind of reinforcement method of soil-covered corrugated steel plate-concrete composite arch bridge, this method comprises the following steps:
(1)开挖桥址土层并对地基进行处理，铺置碎石垫层，并放置钢筋混凝土拱座。(1) Excavate the soil layer of the bridge site and treat the foundation, lay a gravel cushion, and place a reinforced concrete abutment.
(2)将第一波纹钢板和第二波纹钢板通过高强螺栓连接，第二波纹钢板反置于第一波纹钢板下部，之后在横纵向通过高强螺栓进行拼接形成加劲波纹钢板拱圈；拼接时，加劲波纹钢板拱圈的相邻横向接缝错开30-50cm；(2) The first corrugated steel plate and the second corrugated steel plate are connected by high-strength bolts, and the second corrugated steel plate is placed on the lower part of the first corrugated steel plate, and then spliced horizontally and vertically by high-strength bolts to form a stiffened corrugated steel plate arch ring; when splicing, The adjacent transverse joints of the stiffened corrugated steel arch ring are staggered by 30-50cm;
(3)将加劲波纹钢板拱圈安装在钢筋混凝土拱座上，从拱脚向拱圈空腔内压浆灌注混凝土，待混凝土达到设计强度的90％后，在第一波纹钢板顶部浇筑混凝土，最终形成波纹钢板-混凝土组合拱圈；其中，混凝土为轻质高强细骨料混凝土，在第一波纹钢板顶部浇筑的混凝土的厚度应超过第一波纹钢板波峰至少15mm；(3) Install the stiffened corrugated steel plate arch ring on the reinforced concrete abutment, pour concrete into the cavity of the arch ring from the arch foot, and pour concrete on the top of the first corrugated steel plate after the concrete reaches 90% of the design strength. Finally, a corrugated steel plate-concrete composite arch ring is formed; wherein, the concrete is lightweight high-strength fine aggregate concrete, and the thickness of the concrete poured on the top of the first corrugated steel plate should exceed the crest of the first corrugated steel plate by at least 15 mm;
(4)在波纹钢板-混凝土组合拱圈的两侧安装钢筋混凝土圈梁，待第一波纹钢板顶部的混凝土达到设计强度的90％后，分层填筑压实砂土，在到达波纹钢管标高时，安装波纹钢管；(4) Install reinforced concrete ring beams on both sides of the corrugated steel plate-concrete composite arch ring. After the concrete on the top of the first corrugated steel plate reaches 90% of the design strength, fill the compacted sand and soil layer by layer. , install corrugated steel pipe;
(5)在压实砂土的填筑高度达到距离波纹钢板-混凝土组合拱圈拱顶0.1-0.3m处，放置钢筋混凝土卸载板，直至完成所有土层回填压实工作；其中，钢筋混凝土卸载板厚度为20-25cm，与桥面同宽，在纵向覆盖波纹钢板-混凝土组合拱圈的轮廓，同时向两边延伸1-1.5m；(5) When the filling height of the compacted sand reaches 0.1-0.3m from the top of the corrugated steel plate-concrete composite arch ring, place a reinforced concrete unloading plate until all soil layers are backfilled and compacted; among them, the reinforced concrete is unloaded The thickness of the slab is 20-25cm, the same width as the bridge deck, covering the outline of the corrugated steel plate-concrete composite arch circle in the longitudinal direction, and extending 1-1.5m to both sides;
(6)压实砂土达到桥面结构层底面标高后，分层铺设碎石路基、沥青混凝土底基层及沥青混凝土面层，形成桥面结构层，在桥面两侧安装桥梁的防撞栏杆。(6) After the compacted sand reaches the bottom elevation of the bridge deck structure layer, pave the gravel subgrade, asphalt concrete subbase and asphalt concrete surface layer layer by layer to form the bridge deck structure layer, and install bridge anti-collision railings on both sides of the bridge deck .
进一步地，所述压实砂土每层的厚度为0.5-0.6m；在波纹钢板-混凝土组合拱圈附近压实砂土的压实度为0.92-0.95，其他区域压实砂土的压实度为0.96-0.98。Further, the thickness of each layer of the compacted sand is 0.5-0.6m; the compaction of the compacted sand near the corrugated steel plate-concrete composite arch ring is 0.92-0.95, and the compaction of the compacted sand in other areas The degree is 0.96-0.98.
本发明有益效果如下：The beneficial effects of the present invention are as follows:
1、本发明将波纹钢板拼装通过高强螺栓连接，并在其形成的空腔及上侧波纹钢板顶部浇筑轻质高强混凝土形成波纹钢板-混凝土组合拱圈，可使受力拱圈强度、刚度大大增强，并提供顶部混凝土浇筑模板，同时上侧钢板顶部的混凝土提高了拱圈纵横向刚度、耐久性、抗震性、防火性，一定程度上克服了该类型结构拱圈屈曲及波纹钢板锈蚀的问题，进而减少运营使用时拱圈的加固维护费用。1. In the present invention, the corrugated steel plates are assembled and connected by high-strength bolts, and light high-strength concrete is poured on the cavity formed and the top of the upper corrugated steel plates to form a corrugated steel plate-concrete composite arch ring, which can greatly increase the strength and stiffness of the stressed arch ring Reinforcement, and provide top concrete pouring formwork, meanwhile, the concrete on the top of the steel plate on the upper side improves the longitudinal and transverse rigidity, durability, earthquake resistance and fire resistance of the arch ring, and overcomes the buckling of the arch ring and the corrosion of the corrugated steel plate to a certain extent. , thereby reducing the reinforcement and maintenance cost of the arch ring during operation and use.
2、本发明在桥宽两侧设置钢筋混凝土圈梁，保护了填土路基护坡，提高了钢-土复合结构的整体横向刚度，进一步提高了填土和组合拱圈的整体性和抗震性。2. The present invention arranges reinforced concrete ring beams on both sides of the bridge width, which protects the slope protection of the filled embankment, improves the overall transverse stiffness of the steel-soil composite structure, and further improves the integrity and earthquake resistance of the filled soil and the composite arch ring.
3、本发明在填土中放置钢筋混凝土卸载板可扩大了结构受力的区域，减弱拱顶填土高度不足的不利影响，使钢壳结构受力更加均匀，同时大大减小汽车活载对拱圈产生的应力及变形。3. In the present invention, placing reinforced concrete unloading slabs in the filling can expand the area where the structure is stressed, weaken the adverse effects of insufficient filling height on the vault, make the steel shell structure more uniform in force, and greatly reduce the impact of the live load of the vehicle on the structure. Stress and deformation generated by the arch ring.
4、本发明在填土中放置镀锌波纹钢管可减轻组合拱圈所受的恒载，降低了组合拱圈结构的应力及变形，提高了覆土波纹钢板拱桥的跨径及美感，同时在洪水暴雨季节，也可作为泄洪孔。4. Placing galvanized corrugated steel pipes in the filling soil of the present invention can reduce the dead load on the combined arch ring, reduce the stress and deformation of the combined arch ring structure, improve the span and aesthetic feeling of the corrugated steel plate arch bridge covered with soil, and at the same time withstand floods In the rainy season, it can also be used as a flood hole.
附图说明Description of drawings
图1是本发明覆土波纹钢板-混凝土组合拱桥立面图；Fig. 1 is the facade view of the corrugated steel plate-concrete composite arch bridge of the present invention;
图2是本发明覆土波纹钢板-混凝土组合拱桥构造I-I横断面图；Fig. 2 is the structure I-I cross-sectional view of the corrugated steel plate-concrete composite arch bridge of the present invention;
图3是波纹钢板-混凝土组合拱圈1-1横断面图；Fig. 3 is a cross-sectional view of corrugated steel plate-concrete composite arch ring 1-1;
图4是波纹钢板及波纹钢管2-2横断面图；Fig. 4 is a cross-sectional view of corrugated steel plate and corrugated steel pipe 2-2;
图5是波纹钢板拱拼接图；Figure 5 is a mosaic diagram of the corrugated steel arch;
图6是本发明土层回填施工图；Fig. 6 is the construction drawing of soil layer backfill of the present invention;
图中，波纹钢板-混凝土组合拱圈1、钢筋混凝土卸载板2、波纹钢管3、压实砂土4、钢筋混凝土拱座5、碎石垫层6、桥面结构层7、防撞栏杆8、地基9、高强螺栓10、混凝土11、第一波纹钢板12、钢筋混凝土圈梁13、第二波纹钢板14。In the figure, corrugated steel plate-concrete composite arch ring 1, reinforced concrete unloading plate 2, corrugated steel pipe 3, compacted sand and soil 4, reinforced concrete abutment 5, gravel cushion 6, bridge deck structure layer 7, anti-collision railing 8 , foundation 9, high strength bolt 10, concrete 11, first corrugated steel plate 12, reinforced concrete ring beam 13, second corrugated steel plate 14.
具体实施方式Detailed ways
如图1到图6所示，本发明覆土波纹钢板-混凝土组合拱桥的加强方法，包括以下步骤：As shown in Fig. 1 to Fig. 6, the strengthening method of the corrugated steel plate-concrete composite arch bridge of the present invention comprises the following steps:
1、开挖桥址土层，平整夯实地基9，铺置碎石垫层6，并放置钢筋混凝土拱座5。1. Excavate the soil layer of the bridge site, level and compact the foundation 9, lay the crushed stone cushion 6, and place the reinforced concrete abutment 5.
2、将第一波纹钢板12和第二波纹钢板14通过高强螺栓10连接，第二波纹钢板14反置于第一波纹钢板12下部，之后在横纵向通过高强螺栓10进行拼接形成加劲波纹钢板拱圈；拼接时，加劲波纹钢板拱圈的相邻横向接缝错开30～50cm；得到的加劲波纹钢板拱圈可提高受力拱圈纵横向强度、刚度增强。2. The first corrugated steel plate 12 and the second corrugated steel plate 14 are connected by high-strength bolts 10, the second corrugated steel plate 14 is placed on the lower part of the first corrugated steel plate 12, and then spliced horizontally and vertically by high-strength bolts 10 to form a stiffened corrugated steel plate arch When splicing, the adjacent transverse joints of the stiffened corrugated steel plate arch rings are staggered by 30-50cm; the obtained stiffened corrugated steel plate arch rings can increase the longitudinal and transverse strength and rigidity of the stressed arch rings.
3、将加劲波纹钢板拱圈安装在钢筋混凝土拱座5上，从拱脚向拱圈空腔内压浆灌注混凝土11，待混凝土11达到设计强度的90％后，在第一波纹钢板12顶部浇筑混凝土11，最终形成波纹钢板-混凝土组合拱圈1；其中，混凝土11为轻质高强细骨料混凝土，在第一波纹钢板12顶部浇筑的混凝土11的厚度应超过第一波纹钢板12波峰至少15mm，以达到保护波纹钢板的目的。形成的波纹钢板-混凝土组合拱圈1可使结构强度、刚度进一步大幅度地增强，并提供顶部混凝土浇筑模板，同时第一波纹钢板12顶部混凝土11提高了波纹钢板-混凝土组合拱圈1的纵横向刚度、耐久性、抗震性、防火性，一定程度上克服了该类型结构拱圈屈曲及波纹钢板锈蚀的问题，进而减少运营使用时拱圈的加固维护费用。3. Install the stiffened corrugated steel plate arch ring on the reinforced concrete abutment 5, pour concrete 11 into the cavity of the arch ring from the arch foot, and after the concrete 11 reaches 90% of the design strength, place it on the top of the first corrugated steel plate 12 Concrete 11 is poured to finally form a corrugated steel plate-concrete composite arch ring 1; wherein, the concrete 11 is lightweight high-strength fine aggregate concrete, and the thickness of the concrete 11 poured on the top of the first corrugated steel plate 12 should exceed the crest of the first corrugated steel plate 12 by at least 15mm, in order to achieve the purpose of protecting the corrugated steel plate. The formed corrugated steel plate-concrete composite arch ring 1 can greatly enhance the structural strength and rigidity, and provide top concrete pouring formwork, meanwhile, the top concrete 11 of the first corrugated steel plate 12 improves the vertical and horizontal dimensions of the corrugated steel plate-concrete composite arch ring 1 To a certain extent, it overcomes the buckling of the arch ring of this type of structure and the corrosion of corrugated steel plates, thereby reducing the reinforcement and maintenance costs of the arch ring during operation and use.
4、在波纹钢板-混凝土组合拱圈1的两侧安装钢筋混凝土圈梁13，待第一波纹钢板12顶部的混凝土11达到设计强度的90％后，分层填筑压实砂土4，在到达波纹钢管3标高时，安装波纹钢管3；其中压实砂土4每层的厚度为0.5～0.6m；在波纹钢板-混凝土组合拱圈1附近压实砂土4的压实度为0.92-0.95，其他区域压实砂土4的压实度为0.96-0.98，波纹钢管3可采用一般的整装钢管，也可采用管片拼装而成。设置的钢筋混凝土圈梁13，保护了填土路基护坡，提高了钢-土复合结构的整体横向刚度，进一步提高了压实砂土4和波纹钢板-混凝土组合拱圈1的整体性和抗震性。4. Install reinforced concrete ring beams 13 on both sides of the corrugated steel plate-concrete composite arch ring 1. After the concrete 11 on the top of the first corrugated steel plate 12 reaches 90% of the design strength, fill the compacted sand 4 layer by layer. When the corrugated steel pipe 3 elevation is reached, the corrugated steel pipe 3 is installed; the thickness of each layer of the compacted sand 4 is 0.5-0.6m; 0.95, and the compaction degree of the compacted sand 4 in other areas is 0.96-0.98. The corrugated steel pipe 3 can be made of a general packaged steel pipe or assembled from segments. The installed reinforced concrete ring beam 13 protects the slope protection of the filled embankment, improves the overall lateral stiffness of the steel-soil composite structure, and further improves the integrity and earthquake resistance of the compacted sand 4 and the corrugated steel plate-concrete composite arch ring 1 .
5、当压实砂土4的填筑高度达到距离波纹钢板-混凝土组合拱圈1拱顶0.1～0.3m处，放置钢筋混凝土卸载板2，直至完成所有土层回填压实工作；其中，钢筋混凝土卸载板2厚度为20-25cm，与桥面同宽，在纵向覆盖波纹钢板-混凝土组合拱圈1的轮廓，同时向两边延伸1～1.5m；钢筋混凝土卸载板2可扩大受力区域，使钢壳结构受力更加均匀，同时大大减小汽车活载对波纹钢板-混凝土组合拱圈1产生的应力及变形。5. When the filling height of the compacted sand 4 reaches a distance of 0.1 to 0.3m from the corrugated steel plate-concrete composite arch ring 1 vault, place the reinforced concrete unloading plate 2 until all soil layers are backfilled and compacted; The thickness of the concrete unloading plate 2 is 20-25cm, which is the same width as the bridge deck, covering the outline of the corrugated steel plate-concrete composite arch ring 1 in the longitudinal direction, and extending 1-1.5m to both sides; the reinforced concrete unloading plate 2 can expand the stress area, The stress on the steel shell structure is more uniform, and the stress and deformation caused by the live load of the automobile on the corrugated steel plate-concrete composite arch ring 1 are greatly reduced.
6、压实砂土4达到桥面结构层7底面标高后，分层铺设碎石路基、沥青混凝土底基层及沥青混凝土面层，形成桥面结构层7，在桥面两侧安装桥梁的防撞栏杆8。碎石路基、沥青混凝土底基层及沥青混凝土面层应根据覆土波纹钢板-混凝土组合拱桥结构所处的道路路线等级及汽车荷载来确定；在桥面两侧安装的桥梁防撞栏杆8，其尺寸为宽0.5m*高1.1m。6. After the compacted sand 4 reaches the elevation of the bottom surface of the bridge deck structure layer 7, lay gravel roadbed, asphalt concrete subbase and asphalt concrete surface layer in layers to form the bridge deck structure layer 7, and install bridge protection on both sides of the bridge deck. Hit the railing8. The gravel roadbed, asphalt concrete subbase and asphalt concrete surface course shall be determined according to the road route grade and vehicle load of the corrugated steel plate-concrete composite arch bridge structure; the size of the bridge anti-collision railing 8 installed on both sides It is 0.5m wide * 1.1m high.
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| CN108867371A (en) * | 2018-07-13 | 2018-11-23 | 石家庄铁道大学 | A kind of bridge deck structure of arch type bridge engineering |
| RU2822619C1 (en) * | 2023-11-30 | 2024-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный университет путей сообщения" | Ground filling bridge |
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