CN206971246U - Suitable for more pier stud bridge pile foundations on shaped corroded cave model stratum - Google Patents
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- 239000011150 reinforced concrete Substances 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000005755 formation reaction Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 5
- 201000010099 disease Diseases 0.000 abstract description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 101150054854 POU1F1 gene Proteins 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009415 formwork Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000009933 burial Methods 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Abstract
本实用新型涉及一种适用于串珠状溶洞地层的多墩柱桥桩基础，其特征在于：包括多层呈锥斗状的基坑和设在每层基坑内由波纹钢拼接形成的围堰，所述基坑与围堰之间灌注有水泥浆，其中最下一层基坑的基底铺填卵石层，所述卵石层上设有浇砼层，所述浇砼层上设有钢筋砼空心桩基，所述钢筋砼空心桩基上方设有桥墩。本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础施工过程中避免了桩身强行穿越溶洞诱发的各类病害，有效解决了复杂岩溶地区桥梁桩基的建设问题，也大大缩短了施工周期，降低了施工成本。
The utility model relates to a multi-pier-column bridge pile foundation suitable for beaded karst cave strata, which is characterized in that it includes multi-layer foundation pits in the shape of cone buckets and a cofferdam formed by splicing corrugated steel in each layer of foundation pits. Cement slurry is poured between the foundation pit and the cofferdam, wherein the bottom layer of the foundation pit is paved with a pebble layer, the pebble layer is provided with a pouring concrete layer, and the concrete pouring layer is provided with a reinforced concrete hollow A pile foundation, a bridge pier is arranged above the reinforced concrete hollow pile foundation. The utility model is suitable for the multi-pier column bridge pile foundation construction process in the beaded karst cave stratum, avoiding various diseases caused by the pile body forcibly passing through the karst cave, effectively solving the construction problem of the bridge pile foundation in complex karst areas, and greatly shortening the construction time. cycle, reducing construction costs.
Description
技术领域：Technical field:
本实用新型涉及一种适用于串珠状溶洞地层的多墩柱桥桩基础。The utility model relates to a multi-pier column bridge pile foundation suitable for beaded karst cave formations.
背景技术：Background technique:
在串珠状溶洞地层中进行桥桩基础建设难度巨大，特别是桥桩基础容易对下伏溶洞产生扰动，因此在施工过程中需要多次对下伏串珠状溶洞进行初勘、详勘后制定或调整桥桩基础结构，从而造成施工周期延长，成本增加，且还容易穿越溶洞时诱发各类病害。It is very difficult to construct the bridge pile foundation in the beaded cave stratum, especially the bridge pile foundation is easy to disturb the underlying karst cave. Adjusting the foundation structure of bridge piles will prolong the construction period and increase the cost, and it is also easy to induce various diseases when passing through the karst cave.
发明内容：Invention content:
本实用新型的目的在于提供一种适用于串珠状溶洞地层的多墩柱桥桩基础，该适用于串珠状溶洞地层的多墩柱桥桩基础结构简单、设计合理，有效解决了复杂岩溶地区桥梁桩基的建设问题。The purpose of this utility model is to provide a multi-pier column bridge pile foundation suitable for beaded karst cave formations, which is suitable for beaded karst cave formations. The problem of pile foundation construction.
本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础，其特征在于：包括多层呈锥斗状的基坑和设在每层基坑内由波纹钢拼接形成的围堰，所述基坑与围堰之间灌注有水泥浆，其中最下一层基坑的基底铺填卵石层，所述卵石层上设有浇砼层，所述浇砼层上设有钢筋砼空心桩基，所述钢筋砼空心桩基上方设有桥墩。The utility model is suitable for the multi-pier column bridge pile foundation in the beaded karst cave stratum, and is characterized in that it includes multi-layer foundation pits in the shape of cone buckets and a cofferdam formed by splicing corrugated steel in each layer of foundation pits. Cement slurry is poured between the pit and the cofferdam, wherein the bottom layer of the foundation pit is paved with a pebble layer, the pebble layer is provided with a concrete layer, and the concrete layer is provided with a reinforced concrete hollow pile foundation, Bridge piers are arranged above the reinforced concrete hollow pile foundation.
进一步的，上述钢筋砼空心桩基的空心部侧壁为波纹钢内模。Further, the side wall of the hollow part of the above-mentioned reinforced concrete hollow pile foundation is a corrugated steel inner mold.
进一步的，上述钢筋砼空心桩基的上部设有主梁和次梁，所述主梁设在钢筋砼空心桩基的长边方向，所述次梁设在钢筋砼空心桩基的短边方向，所述主梁和次梁上方设有顶板。Further, the upper part of the reinforced concrete hollow pile foundation is provided with a main beam and a secondary beam, the main beam is arranged in the direction of the long side of the reinforced concrete hollow pile foundation, and the secondary beam is arranged in the direction of the short side of the reinforced concrete hollow pile foundation , a top plate is arranged above the main beam and the secondary beam.
进一步的，上述桥墩为两根、三根、四根或五根。Further, the above-mentioned bridge piers are two, three, four or five.
进一步的，上述顶板上设有工作洞。Further, a working hole is provided on the above-mentioned top plate.
进一步的，上述钢筋砼空心桩基横截面由两个等直径半圆与一个矩形组成，整体呈“0”型；桩体内部为空心，以使桩基本身及上部结构的总重量不超过或少超过挖除的土重。Further, the cross-section of the above-mentioned reinforced concrete hollow pile foundation is composed of two equal-diameter semicircles and a rectangle, and the overall shape is "0"; the inside of the pile body is hollow, so that the total weight of the pile foundation itself and the superstructure does not exceed or less Exceeds the weight of excavated soil.
本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础的建造方法，所述适用于串珠状溶洞地层的多墩柱桥桩基础包括多层呈锥斗状的基坑和设在每层基坑内由波纹钢拼接形成的围堰，所述基坑与围堰之间灌注有水泥浆，其中最下一层基坑的基底铺填卵石层，所述卵石层上设有浇砼层，所述浇砼层上设有钢筋砼空心桩基，所述钢筋砼空心桩基上方设有桥墩；The utility model is applicable to the construction method of the multi-pier column bridge pile foundation applicable to the beaded karst cave stratum. A cofferdam formed by splicing corrugated steel in the foundation pit, cement slurry is poured between the foundation pit and the cofferdam, and the bottom layer of the foundation pit is paved with a pebble layer, and the pebble layer is provided with a concrete layer, A reinforced concrete hollow pile foundation is arranged on the pouring concrete layer, and a bridge pier is arranged above the reinforced concrete hollow pile foundation;
施工时，(1)平整场地，利用小型挖掘机开挖第一层基坑，坑中设置集水井进行抽水施工；During construction, (1) level the site, use a small excavator to excavate the first layer of foundation pit, and set a water collection well in the pit for pumping construction;
(2)使用吊机拼装曲面波形钢片，形成首节大直径竖向管，搭设脚手架，使用螺栓将上、下层波形钢连成整体，接缝用特制胶密封止水，完成波纹钢围堰外模； (2) Use a crane to assemble curved corrugated steel sheets to form the first large-diameter vertical pipe, set up scaffolding, use bolts to connect the upper and lower layers of corrugated steel into a whole, seal the joints with special glue to stop water, and complete the corrugated steel cofferdam Outer mold;
(3)在波形钢外模外侧安置压浆管，在第一层基坑与围堰之间回填等粒径卵石后，再注入水泥浆，形成波形钢注浆砼围堰； (3) Install grouting pipes outside the corrugated steel outer mold, backfill pebbles of equal particle size between the foundation pit of the first layer and the cofferdam, and then inject cement slurry to form corrugated steel grouted concrete cofferdam;
(4)在围堰内抽水，开挖第二层基坑，再安放直径较前缩小一级的第二层波纹钢外模，用同样施工方法完成多层上大下小呈锥形的变直径波纹钢砼围堰； (4) Pump water in the cofferdam, excavate the second layer of foundation pit, and then place the second layer of corrugated steel outer formwork with a smaller diameter than before, and use the same construction method to complete the multi-layered conical deformation. Diameter corrugated steel concrete cofferdam;
(5)完成多层变径波形钢砼围堰后，在最下一层基坑基底铺填1m厚等粒径卵石层，在其中插入压浆管； (5) After completing the multi-layer variable-diameter corrugated steel concrete cofferdam, pave and fill a 1m-thick pebble layer of equal particle size at the foundation pit base of the bottom layer, and insert a grouting pipe into it;
(6)在围堰内放水，浇筑水下砼封底形成浇砼层； (6) Water is released in the cofferdam, and the bottom cover of the underwater concrete is poured to form a poured concrete layer;
(7)养护期后抽水，在围堰内绑扎钢筋砼空心桩基钢筋，安装波纹钢内模，自下而上分层完成下部、中部钢筋砼空心桩基； (7) Pump water after the maintenance period, bind the reinforced concrete hollow pile foundation steel bars in the cofferdam, install the corrugated steel inner mold, and complete the lower and middle reinforced concrete hollow pile foundations in layers from bottom to top;
(8)安装主、次梁板模，绑扎主次梁、顶板钢筋，完成钢筋砼空心桩基上部。(8) Install the main and secondary beam formwork, bind the primary and secondary beams, roof reinforcement, and complete the upper part of the reinforced concrete hollow pile foundation.
(9)在钢筋砼空心桩基上完成桥墩，在空心桩内注浆。(9) Complete the pier on the reinforced concrete hollow pile foundation, and inject grout into the hollow pile.
本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础吸收了补偿基础、摩擦群桩和墩式基础的优点，针对具有一定覆盖层厚度的岩溶地区中小跨径桥梁桩基，充分利用了上覆土层的承载能力，桩底采用不入岩来减小对下伏溶洞的扰动，在初勘获得溶洞埋深后便无需继续下伏串珠状溶洞的详勘，施工过程中避免了桩身强行穿越溶洞诱发的各类病害，有效解决了复杂岩溶地区桥梁桩基的建设问题，也大大缩短了施工周期，降低了施工成本。The utility model is suitable for the multi-pier column bridge pile foundation in the beaded karst cave stratum, which absorbs the advantages of compensation foundation, friction pile group and pier foundation, and makes full use of the small and medium-span bridge pile foundation in karst areas with a certain thickness The bearing capacity of the overlying soil layer, the bottom of the pile is not penetrated into the rock to reduce the disturbance to the underlying karst cave. After the burial depth of the karst cave is obtained in the initial survey, there is no need to continue the detailed survey of the underlying beaded karst cave. During the construction process, the pile body is avoided. All kinds of diseases induced by forcibly crossing karst caves have effectively solved the construction problems of bridge pile foundations in complex karst areas, and also greatly shortened the construction period and reduced construction costs.
附图说明：Description of drawings:
图1是第一层基坑开挖的剖面图示意图；Fig. 1 is the schematic diagram of the section view of the excavation of the first layer foundation pit;
图2是第一层基坑围堰外模的剖面图示意图；Fig. 2 is the schematic diagram of the section view of the first layer foundation pit cofferdam outer mold;
图3是第一层基坑与围堰之间灌注水泥浆的剖面图示意图；Fig. 3 is a schematic cross-sectional view of pouring cement slurry between the foundation pit of the first layer and the cofferdam;
图4是开挖第一层基坑及围堰的剖面图示意图；Fig. 4 is the schematic diagram of the section view of excavating the first layer foundation pit and cofferdam;
图5是最下一层基坑基底铺填卵石层的剖面图示意图；Fig. 5 is the schematic diagram of the cross-section of the foundation pit base paving and filling pebble layer;
图6是浇筑形成浇砼层的剖面图示意图；Fig. 6 is a schematic sectional view of pouring to form a pouring concrete layer;
图7是在基坑内建筑空心桩基的剖面图示意图；Fig. 7 is a schematic diagram of a cross-sectional view of building a hollow pile foundation in a foundation pit;
图8是建筑主次梁及顶板的剖面图示意图；Fig. 8 is a schematic cross-sectional view of building primary and secondary beams and roof;
图9是本实用新型完成桥墩后的剖面图示意图；Fig. 9 is a schematic sectional view of the utility model after completing the bridge pier;
图10是图9的俯视图；Figure 10 is a top view of Figure 9;
图11是图9的左视图；Fig. 11 is the left view of Fig. 9;
图12是图9另一种实施例的剖面图；Fig. 12 is a sectional view of another embodiment of Fig. 9;
图13是图12的俯视图。FIG. 13 is a top view of FIG. 12 .
具体实施方式：detailed description:
下面结合实施例对本实用新型方法作进一步的详细说明。需要特别说明的是，本实用新型的保护范围应当包括但不限于本实施例所公开的技术内容。Below in conjunction with embodiment the utility model method is described in further detail. It should be noted that the protection scope of the present utility model shall include but not be limited to the technical content disclosed in this embodiment.
本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础包括多层呈锥斗状的基坑1和设在每层基坑1内由波纹钢2拼接形成的围堰3，所述基坑1与围堰3之间灌注有水泥浆4，其中最下一层基坑的基底铺填卵石层5，所述卵石层上设有浇砼层6，所述浇砼层6上设有钢筋砼空心桩基7，所述钢筋砼空心桩基7上方设有桥墩8。The utility model is suitable for the multi-pier column bridge pile foundation in the beaded karst cave stratum, which includes a multi-layer foundation pit 1 in the shape of a cone bucket and a cofferdam 3 formed by splicing corrugated steel 2 in the foundation pit 1 of each layer. Cement slurry 4 is poured between the pit 1 and the cofferdam 3, wherein the bottom layer of the foundation pit is paved with a pebble layer 5, the pebble layer is provided with a concrete layer 6, and the concrete layer 6 is provided with A reinforced concrete hollow pile foundation 7, and a bridge pier 8 is arranged above the reinforced concrete hollow pile foundation 7.
进一步的，为了设计合理，施工稳定可靠，上述钢筋砼空心桩基的空心部侧壁9为波纹钢内模。Further, for rational design and stable and reliable construction, the side wall 9 of the hollow part of the above-mentioned reinforced concrete hollow pile foundation is a corrugated steel inner mold.
进一步的，为了增加支撑强度，上述钢筋砼空心桩基的上部设有主梁10和次梁11，所述主梁10设在钢筋砼空心桩基的长边方向，所述次梁设在钢筋砼空心桩基的短边方向，所述主梁10和次梁11上方设有顶板12。Further, in order to increase the support strength, the upper part of the reinforced concrete hollow pile foundation is provided with a main beam 10 and a secondary beam 11, the main beam 10 is arranged in the long side direction of the reinforced concrete hollow pile foundation, and the secondary beam is arranged on the In the short side direction of the concrete hollow pile foundation, a top plate 12 is provided above the main beam 10 and the secondary beam 11 .
进一步的，为了设计合理，上述桥墩为两根、三根、四根或五根。Further, in order to design rationally, the above-mentioned bridge piers are two, three, four or five.
进一步的，为了便于查看或检修，上述顶板上设有工作洞13。Further, in order to facilitate inspection or maintenance, a working hole 13 is provided on the above-mentioned top plate.
进一步的，上述钢筋砼空心桩基横截面由两个等直径半圆与一个矩形组成（如图10所示），整体呈“0”型；桩体内部为空心，以使桩基本身及上部结构的总重量不超过或少超过挖除的土重。Further, the cross-section of the above-mentioned reinforced concrete hollow pile foundation is composed of two equal-diameter semicircles and a rectangle (as shown in Figure 10), and the overall shape is "0"; the inside of the pile body is hollow, so that the pile foundation itself and the superstructure The total weight of the soil shall not exceed or less than the excavated soil weight.
本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础的建造方法，所述适用于串珠状溶洞地层的多墩柱桥桩基础包括多层呈锥斗状的基坑1和设在每层基坑1内由波纹钢2拼接形成的围堰3，所述基坑1与围堰3之间灌注有水泥浆4，其中最下一层基坑的基底铺填卵石层5，所述卵石层上设有浇砼层6，所述浇砼层6上设有钢筋砼空心桩基7，所述钢筋砼空心桩基7上方设有桥墩8；The utility model is applicable to the construction method of the multi-pier column bridge pile foundation applicable to the beaded karst cave stratum. A cofferdam 3 formed by splicing corrugated steel 2 in the foundation pit 1, cement slurry 4 is poured between the foundation pit 1 and the cofferdam 3, and the bottom layer of the foundation pit is paved with a pebble layer 5. A concrete pouring layer 6 is arranged on the pebble layer, a reinforced concrete hollow pile foundation 7 is arranged on the concrete pouring layer 6, and a pier 8 is arranged above the reinforced concrete hollow pile foundation 7;
施工时，(1)平整场地，利用小型挖掘机开挖第一层基坑，坑中设置集水井进行抽水施工，如图1所示；During construction, (1) level the site, use a small excavator to excavate the first layer of foundation pit, set a water collection well in the pit for pumping construction, as shown in Figure 1;
(2)使用吊机拼装曲面波形钢片，形成首节大直径竖向管，搭设脚手架，使用螺栓将上、下层波形钢连成整体，接缝用特制胶密封止水，完成波纹钢围堰外模，如图2所示； (2) Use a crane to assemble curved corrugated steel sheets to form the first large-diameter vertical pipe, set up scaffolding, use bolts to connect the upper and lower layers of corrugated steel into a whole, seal the joints with special glue to stop water, and complete the corrugated steel cofferdam Outer mold, as shown in Figure 2;
(3)在波形钢外模外侧安置压浆管，在第一层基坑与围堰之间回填等粒径卵石后，再注入水泥浆，形成波形钢注浆砼围堰，如图3所示； (3) Install the grouting pipe outside the corrugated steel outer mold, backfill the pebbles with the same particle size between the first layer of foundation pit and the cofferdam, and then inject cement slurry to form corrugated steel grouted concrete cofferdam, as shown in Figure 3 Show;
(4)在围堰内抽水，开挖第二层基坑，再安放直径较前缩小一级的第二层波纹钢外模，用同样施工方法完成多层上大下小呈锥形的变直径波纹钢砼围堰，如图4所示； (4) Pump water in the cofferdam, excavate the second layer of foundation pit, and then place the second layer of corrugated steel outer formwork with a smaller diameter than before, and use the same construction method to complete the multi-layered conical deformation. Diameter corrugated steel concrete cofferdam, as shown in Figure 4;
(5)完成多层变径波形钢砼围堰后，在最下一层基坑基底铺填1m厚等粒径卵石层，在其中插入压浆管，如图5所示； (5) After completing the multi-layer variable-diameter corrugated steel concrete cofferdam, pave and fill a 1m-thick pebble layer with equal particle size at the foundation pit base of the lowest layer, and insert a grouting pipe into it, as shown in Figure 5;
(6)在围堰内放水，浇筑水下砼封底形成浇砼层，如图6所示； (6) Water is released in the cofferdam, and the bottom cover of pouring underwater concrete forms the pouring concrete layer, as shown in Figure 6;
(7)养护期后抽水，在围堰内绑扎钢筋砼空心桩基钢筋，安装波纹钢内模，自下而上分层完成下部、中部钢筋砼空心桩基，如图7所示； (7) pump water after the maintenance period, bind the reinforced concrete hollow pile foundation steel bars in the cofferdam, install the corrugated steel inner mold, and complete the lower and middle reinforced concrete hollow pile foundations layer by layer from bottom to top, as shown in Figure 7;
(8)安装主、次梁板模，绑扎主次梁、顶板钢筋，完成钢筋砼空心桩基上部，如图8所示。(8) Install the main and secondary beam formwork, bind the primary and secondary beams and the roof reinforcement, and complete the upper part of the reinforced concrete hollow pile foundation, as shown in Figure 8.
(9)在钢筋砼空心桩基上完成桥墩，在空心桩内注浆，如图9所示。(9) Complete the pier on the reinforced concrete hollow pile foundation, and inject grout into the hollow pile, as shown in Figure 9.
本实用新型适用于串珠状溶洞地层的多墩柱桥桩基础吸收了补偿基础、摩擦群桩和墩式基础的优点，针对具有一定覆盖层厚度的岩溶地区中小跨径桥梁桩基，充分利用了上覆土层的承载能力，桩底采用不入岩来减小对下伏溶洞的扰动，在初勘获得溶洞埋深后便无需继续下伏串珠状溶洞的详勘，施工过程中避免了桩身强行穿越溶洞诱发的各类病害，有效解决了复杂岩溶地区桥梁桩基的建设问题，也大大缩短了施工周期，降低了施工成本。The utility model is suitable for the multi-pier column bridge pile foundation in the beaded karst cave stratum, which absorbs the advantages of compensation foundation, friction pile group and pier foundation, and makes full use of the small and medium-span bridge pile foundation in karst areas with a certain thickness The bearing capacity of the overlying soil layer, the bottom of the pile is not penetrated into the rock to reduce the disturbance to the underlying karst cave. After the burial depth of the karst cave is obtained in the initial survey, there is no need to continue the detailed survey of the underlying beaded karst cave. During the construction process, the pile body is avoided. All kinds of diseases induced by forcibly crossing karst caves have effectively solved the construction problems of bridge pile foundations in complex karst areas, and also greatly shortened the construction period and reduced construction costs.
以上所述仅为本实用新型的较佳实施例，凡依本实用新型申请专利范围所做的均等变化与修饰，皆应属本实用新型的涵盖范围。The above descriptions are only preferred embodiments of the present utility model, and all equal changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.
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