WO2022252754A1 - 一种预制装配与现浇砼组合式风机基础 - Google Patents

一种预制装配与现浇砼组合式风机基础 Download PDF

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WO2022252754A1
WO2022252754A1 PCT/CN2022/081402 CN2022081402W WO2022252754A1 WO 2022252754 A1 WO2022252754 A1 WO 2022252754A1 CN 2022081402 W CN2022081402 W CN 2022081402W WO 2022252754 A1 WO2022252754 A1 WO 2022252754A1
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cast
prefabricated assembly
prefabricated
concrete
place concrete
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PCT/CN2022/081402
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English (en)
French (fr)
Inventor
张立英
高建辉
郭辰
邓明基
张国
张庆
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中国华能集团清洁能源技术研究院有限公司
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Priority claimed from CN202121238444.0U external-priority patent/CN214940346U/zh
Priority claimed from CN202110620822.XA external-priority patent/CN113216241A/zh
Application filed by 中国华能集团清洁能源技术研究院有限公司 filed Critical 中国华能集团清洁能源技术研究院有限公司
Publication of WO2022252754A1 publication Critical patent/WO2022252754A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the application relates to the field of wind farms, in particular to a wind turbine foundation combined with prefabricated assembly and cast-in-place concrete.
  • the foundation of wind turbines is an important part of wind farm construction, not only related to the safe and reliable operation of wind farms, but also affects the investment of wind farms.
  • the commonly used fan foundation forms include extended fan foundation and pile foundation.
  • the extended foundation mainly uses its own gravity to resist the large bending moment load of the upper structure.
  • the pile foundation is adopted when the natural foundation does not meet the requirements of the bearing capacity and deformation of the foundation structure.
  • the vertical action of the pile is used to bear the bending moment load of the superstructure, and the pile cap is set to connect the foundation pile to form an overall structure.
  • connection between the bottom of the tower and the foundation is in the form of a foundation ring or an anchor bolt cage.
  • Stress concentration occurs near the connecting components, and the requirements for concrete strength are relatively high.
  • the concrete strength requirements are generally not lower than C40.
  • the main range affected by stress concentration is generally within 7m in diameter, which can be called the main stress area; the concrete outside the 7m range basically plays an integral role, and the requirements for flexural and shear strength are not high, so it can be called the non-main stress area. force zone.
  • This application provides a prefabricated assembly and cast-in-place concrete combined fan foundation, which adopts factory high-strength concrete prefabrication in the main stress-bearing area of the foundation structure, which can ensure the pouring quality of concrete strength and shape, and adopts on-site concrete in non-main stress-bearing areas.
  • a lower concrete strength grade is adopted under the premise of meeting the design requirements, which can better adapt to the construction operation conditions and reduce engineering costs, and improve the efficiency of on-site operations.
  • a prefabricated assembly and cast-in-place concrete combined fan foundation including a prefabricated assembly part and a cast-in-place concrete part, the prefabricated assembly part is ring-shaped, and the prefabricated assembly part is embedded in the cast-in-place concrete part Among them, the bolts are pre-embedded in the prefabricated assembly part.
  • the prefabricated assembly part is a cylinder with a circular or polygonal ring in plane section, and the diameter or the diameter of the inscribed circle of the polygon is not less than 7m.
  • the prefabricated assembly part includes several prefabricated high-strength concrete blocks.
  • the maximum size of the prefabricated high-strength concrete block does not exceed 4.5m.
  • Prefabricated assembly parts are formed by prestressing or high-strength grouting between prefabricated high-strength concrete blocks.
  • a rib insertion hole is reserved on the prefabricated assembly part, and the rib insertion hole is opened along the radial direction of the prefabricated assembly part.
  • Inserting bars are arranged in the inserting bar holes, and the inserting bars extend into the cast-in-place concrete part.
  • the concrete strength of the cast-in-place concrete part is lower than C40.
  • the sides of the prefabricated assembly part are arranged with zigzag structures along the longitudinal direction.
  • this application combines the force characteristics of the fan foundation, fully utilizes the process characteristics and advantages of prefabricated concrete and cast-in-place concrete, and adopts high-strength concrete in the main force-bearing area of the foundation structure.
  • Concrete factory prefabrication overcomes the difficulties of dispersed wind farm construction points, poor construction conditions, and difficulty in construction quality control and supervision.
  • FIG. 1 is a schematic top view of a structure that can be implemented in the present application.
  • Fig. 2 is a schematic elevation sectional view of an implementable structure of the present application.
  • FIG. 3 is a schematic diagram of the prefabricated assembly part 1 .
  • a prefabricated assembly and cast-in-place concrete combined fan foundation includes a prefabricated assembly part 1 and a cast-in-place concrete part 2, the prefabricated assembly part 1 is ring-shaped, and the prefabricated assembly part 1 is embedded in the cast-in-place concrete part In 2, bolts are pre-embedded in the prefabricated assembly part 1, and the bolts are used to connect the wind turbine tower or the wind turbine support.
  • the prefabricated assembly part 1 is a cylindrical body whose planar section is circular or polygonal, and the diameter or the diameter of the inscribed circle of the polygon is not less than 7m.
  • the prefabricated assembly part 1 includes several prefabricated high-strength concrete blocks 3, the maximum size of the prefabricated high-strength concrete blocks 3 is not more than 4.5m, and the prefabricated high-strength concrete blocks 3 are divided into several prefabricated high-strength concrete blocks 3 along the longitudinal direction of the prefabricated assembly part 1.
  • the prefabricated assembly part 1 is formed by prefabricated high-strength concrete blocks 3 by means of prestressing or high-strength grouting.
  • a rib insertion hole 4 is reserved on the prefabricated assembly part 1 , and the rib insertion hole 4 is opened along the radial direction of the prefabricated assembly part 1 .
  • a rib 5 is arranged in the rib hole 4 , and the rib 5 extends into the cast-in-place concrete part 2 .
  • the gap between the rib 5 and the hole for inserting the rib is filled with high-strength polymer mortar.
  • the concrete strength of the cast-in-place concrete part 2 is lower than C40.
  • the side of the prefabricated assembly part 1 is arranged with a zigzag structure along the longitudinal direction, which can make the connection between the assembly part 1 and the cast-in-place concrete part 2 stronger, and does not affect the joint between the cast-in-place concrete part 2 and the prefabricated assembly part 1 Density.
  • the prefabricated assembly part 1 is formed by methods such as prestressing or high-strength grouting between the prefabricated high-strength concrete blocks 3 .
  • a combined prefabricated assembly and cast-in-place concrete fan foundation including a prefabricated assembly part 1 and a cast-in-place concrete part 2; the prefabricated assembly part is prefabricated with not less than C40 grade concrete. Generally, it can be prefabricated in blocks, and then assembled to form the whole prefabricated structure; the prefabricated assembly part 1 adopts prestressing or high-strength grouting method to connect the prefabricated blocks to form the whole prefabricated structure; the prefabricated structure blocks are reserved with holes for inserting ribs, assembled in place to become After the prefabricated structure is integrated, the reinforcement is inserted, and then the on-site low-grade concrete is poured to form the foundation of the fan.
  • the prefabricated assembly part 1 can also be divided into smaller prefabricated high-strength concrete blocks 3 according to the equipment conditions at the initial stage of construction, so as to reduce the weight and size of a single prefabricated high-strength concrete block 3, Easy to transport and hoist.
  • the prefabricated high-strength concrete block 3 is provided with an anchoring reinforcing connector, such as a prestressed anchor rod, and the gap between the prestressed anchor rod and the prefabricated high-strength concrete block 3 is filled with high-strength non-shrinkage grouting material.
  • an anchoring reinforcing connector such as a prestressed anchor rod
  • this application provides a prefabricated assembly and cast-in-place concrete combined fan foundation, including the prefabricated assembly part and the cast-in-place concrete part; the main stress area is the prefabricated assembly part, and the non-main stress area is the cast-in-place concrete part ;
  • the prefabricated assembly part is prefabricated with high-strength concrete of not less than C40 grade.
  • the transportation size limit it is generally prefabricated in blocks first, and then the prefabricated blocks are assembled and connected by prestressing or high-strength grouting methods to form a prefabricated structure as a whole; prefabricated assembly structural blocks Reinforcement holes are reserved on the upper part, and the prefabricated structure is assembled in place to insert reinforcement, and then the remaining structure of the fan foundation is poured with low-grade concrete on site to form the fan foundation.
  • This application combines the force characteristics of the fan foundation, fully utilizes the technological characteristics and advantages of prefabricated concrete and cast-in-place concrete, and adopts high-strength concrete factory prefabrication in the main force-bearing area of the foundation structure, which overcomes the scattered construction points and poor construction conditions of the wind farm , Construction quality control and supervision are difficult, and the quality of concrete pouring in key stress-bearing areas can be better guaranteed; cast-in-place concrete is used in non-main stress-bearing areas, and a lower concrete strength grade is adopted under the premise of meeting the design requirements, which is better suitable for construction operating conditions and reduce engineering costs.

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  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • Sustainable Energy (AREA)
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Abstract

一种预制装配与现浇砼组合式风机基础，包括预制装配部分和现浇砼部分，预制装配部分为环形，预制装配部分嵌入现浇砼部分中，预制装配部分预埋螺栓；本申请结合风机基础的受力特点，充分利用了预制砼和现浇砼的工艺特点和优势，在基础结构主要受力区采取高强度混凝土工厂预制，克服了风电场施工点分散、施工条件差、施工质量控制和监管难度大等困难，比全部采取现浇施工更好保证关键受力区混凝土强度浇筑质量；在非主要受力区采取现浇砼，满足设计要求的前提下采取较低混凝土强度等级，更好适应施工作业条件并降低工程成本；现场混凝土浇筑方量减少，提高了项目现场的施工效率。

Description

一种预制装配与现浇砼组合式风机基础
本申请要求于2021年06月03日提交中国专利局、申请号为202110620822.X、发明名称为“一种预制装配与现浇砼组合式风机基础”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
还要求于2021年06月03日提交中国专利局、申请号为202121238444.0、发明名称为“一种预制装配与现浇砼组合式风机基础”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及风电场领域，尤其涉及一种预制装配与现浇砼组合的风机基础。
背景技术
风电机组基础是风电场建设的重要组成部分，不仅关系风电场的安全可靠运行，还影响着风电场的投资。根据地质条件的适应性，目前常用的风机基础形式有扩展式风机基础和桩基础，扩展式基础主要利用自身重力抵抗上部结构的大弯矩荷载，当地质条件较弱也有经过地基处理后再采取扩展式基础的。桩基础是在天然地基不满足基础结构承载力、变形等要求的情况下采取桩基础，利用桩的竖向作用承载上部结构弯矩荷载，设置承台连接基桩形成整体结构。不论是哪种基础结构形式，塔筒底部与基础的连接采用基础环形式还是锚栓笼的形式，连接构件附近产生应力集中，对 混凝土强度要求较高，混凝土强度要求一般不低于C40，而应力集中影响的主要范围一般在直径7m以内，可称为主要受力区；7m范围以外的混凝土则基本上起到整体性作用，抗弯抗剪强度要求均不高，可称为非主要受力区。目前基础混凝土的浇筑多采用连续浇筑，设计采取统一的混凝土强度，使非主要受力区混凝土强度未得到充分利用，主要受力区又往往由于施工控制原因不能达到设计强度要求，以往出现的基础环或锚栓笼锚板附近混凝土强度不足引发的工程问题已经屡见不鲜。
发明内容
本申请提供一种预制装配与现浇砼组合式风机基础，在基础结构主要受力区采取工厂高强度混凝土预制，很好的保证混凝土强度及外形等浇筑质量，在非主要受力区采取现浇砼，满足设计要求的前提下采取较低混凝土强度等级，更好适应施工作业条件并降低工程成本，提高现场作业效率。
为了实现上述目的，本申请采用的技术方案是：一种预制装配与现浇砼组合式风机基础，包括预制装配部分和现浇砼部分，预制装配部分为环形，预制装配部分嵌入现浇砼部分中，预制装配部分中预埋螺栓。
预制装配部分为平面截面为圆环形或多边形环的柱体，直径或多边形的内切圆直径不小于7m。
预制装配部分包括若干预制高强混凝土块，预制高强混凝土块最大尺寸不超过4.5m，预制高强混凝土块沿预制装配部分的纵向分出若干预制高强混凝土块。
预制高强混凝土块之间采取预应力或高强灌浆的方法形成预制装配部 分。
预制装配部分上预留插筋孔，所述插筋孔沿着预制装配部分的径向开设。
插筋孔中布置插筋，插筋伸入现浇砼部分中。
插筋和插筋孔之间的缝隙中填入高强聚合物砂浆。
现浇砼部分的混凝土强度低于C40。
预制装配部分的侧面一周沿着纵向布置有锯齿状结构。
与现有技术相比，本申请至少具有以下有益效果：本申请结合风机基础的受力特点，充分利用了预制砼和现浇砼的工艺特点和优势，在基础结构主要受力区采取高强度混凝土工厂预制，克服了风电场施工点分散、施工条件差、施工质量控制和监管难度大等困难，比全部采取现浇施工更好保证关键受力区混凝土强度浇筑质量；在非主要受力区采取现浇砼，满足设计要求的前提下采取较低混凝土强度等级，更好适应施工作业条件并降低工程成本；现场混凝土浇筑方量减少约30％，提高了项目现场的施工效率。
附图说明
图1为本申请一种可实施的结构俯视示意图。
图2为本申请一种可实施的结构立面剖视示意图。
图3为预制装配部分1示意图。
图中：1-预制装配部分；2-现浇砼部分；3-预制高强混凝土块；4-插筋孔；5-插筋；6-风机基础。
具体实施方式
下面结合附图以及具体实施方式，对本申请做详细的解释说明。
如图1和图2所示，一种预制装配与现浇砼组合式风机基础，包括预制装配部分1和现浇砼部分2，预制装配部分1为环形，预制装配部分1嵌入现浇砼部分2中，预制装配部分1预埋螺栓，所述螺栓用于连接风机塔筒或风机支架。
预制装配部分1为平面截面为圆环形或多边形环的柱体，直径或多边形的内切圆直径不小于7m。
预制装配部分1包括若干预制高强混凝土块3，预制高强混凝土块3最大尺寸不超过4.5m，预制高强混凝土块3沿预制装配部分1的纵向分出若干预制高强混凝土块3。
预制高强混凝土块3之间采取预应力或高强灌浆等方法形成预制装配部分1。
预制装配部分1上预留插筋孔4，所述插筋孔4沿着预制装配部分1的径向开设。
插筋孔4中布置插筋5，插筋5伸入现浇砼部分2中。
插筋5和插筋孔之间的缝隙中填入高强聚合物砂浆。
现浇砼部分2的混凝土强度低于C40。
预制装配部分1的侧面一周沿着纵向布置有锯齿状结构，能使得与装配部分1与现浇砼部分2的之间结合更加牢固，而且不影响现浇砼部分2与预制装配部分1结合处密实程度。
预制高强混凝土块3之间采取预应力或高强灌浆等方法形成预制装配 部分1。
参考图2和图3，一种预制装配与现浇砼组合式风机基础，包括预制装配部分1和现浇砼部分2；预制装配部分采用不低于C40标号混凝土进行预制，根据运输尺寸限制，一般可进行分块预制，再通过装配形成预制结构整体；预制装配部分1采用预应力或高强灌浆方法将预制分块连接为预制结构整体；预制结构块上预留插筋孔，拼装就位成为预制结构整体后进行插筋，再进行现场低标号混凝土浇筑，形成风机基础。
作为可选的实施例，在实际建造时，也可以根据施工初期的设备情况，将预制装配部分1分为更小的预制高强混凝土块3，以降低单个预制高强混凝土块3的重量和尺寸，便于运输和吊装。
作为可选的实施例，预制高强混凝土块3中设置锚固加强连接件，如预应力锚杆，预应力锚杆与预制高强混凝土块3的缝隙中填充高强无收缩灌浆料。
综上所述，本申请提供一种预制装配与现浇砼组合式风机基础，包括预制装配部分和现浇砼部分；主要受力区为预制装配部分，非主要受力区为现浇砼部分；预制装配部分采用不低于C40标号高强混凝土进行预制，根据运输尺寸限制，一般先进行分块预制，再通过预应力或高强灌浆方法将预制分块装配连接形成预制结构整体；预制装配结构块上预留插筋孔，拼装就位成为预制结构整体后进行插筋，再对风机基础剩余结构进行现场低标号混凝土浇筑，形成风机基础。本申请结合风机基础的受力特点，充分利用了预制砼和现浇砼的工艺特点和优势，在基础结构主要受力区采取高强度混凝土工厂预制，克服了风电场施工点分散、施工条件差、施工质 量控制和监管难度大等困难，更好保证关键受力区混凝土浇筑质量；在非主要受力区采取现浇砼，满足设计要求的前提下采取较低混凝土强度等级，更好适应施工作业条件并降低工程成本。

Claims (9)

  1. 一种预制装配与现浇砼组合式风机基础，其特征在于，包括预制装配部分(1)和现浇砼部分(2)，预制装配部分(1)为环形，预制装配部分(1)嵌入现浇砼部分(2)中，预制装配部分(1)预埋螺栓。
  2. 根据权利要求1所述的预制装配与现浇砼组合式风机基础，其特征在于，预制装配部分(1)为平面截面为圆环形或多边形环的柱体，直径或多边形的内切圆直径不小于7m。
  3. 根据权利要求1所述的预制装配与现浇砼组合式风机基础，其特征在于，预制装配部分(1)包括若干预制高强混凝土块(3)，预制高强混凝土块(3)最大尺寸不超过4.5m，预制高强混凝土块(3)沿预制装配部分(1)的纵向分出若干预制高强混凝土块(3)。
  4. 根据权利要求3所述的预制装配与现浇砼组合式风机基础，其特征在于，预制高强混凝土块(3)之间采取预应力或高强灌浆的方法形成预制装配部分(1)。
  5. 根据权利要求1所述的预制装配与现浇砼组合式风机基础，其特征在于，预制装配部分(1)上预留插筋孔(4)，所述插筋孔(4)沿着预制装配部分(1)的径向开设。
  6. 根据权利要求5所述的预制装配与现浇砼组合式风机基础，其特征在于，插筋孔(4)中布置插筋(5)，插筋(5)伸入现浇砼部分(2)中。
  7. 根据权利要求6所述的预制装配与现浇砼组合式风机基础，其特征在于，插筋(5)和插筋孔之间的缝隙中填入高强聚合物砂浆。
  8. 根据权利要求1所述的预制装配与现浇砼组合式风机基础，其特征 在于，现浇砼部分(2)的混凝土强度低于C40。
  9. 根据权利要求1所述的预制装配与现浇砼组合式风机基础，其特征在于，预制装配部分(1)的侧面一周沿着纵向布置有锯齿状结构。
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