CN204326119U - A kind of pile-raft foundation float Structure - Google Patents
A kind of pile-raft foundation float Structure Download PDFInfo
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- CN204326119U CN204326119U CN201420753240.4U CN201420753240U CN204326119U CN 204326119 U CN204326119 U CN 204326119U CN 201420753240 U CN201420753240 U CN 201420753240U CN 204326119 U CN204326119 U CN 204326119U
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Abstract
本实用新型涉及一种桩筏基础抗浮结构,地下室侧墙与支护桩通过横向的连接钢筋连接;地下室底板下打设有钻孔灌注桩;地下室底板下方从上至下依次为碎石垫层、回填灰土层、钢筋混凝土隔水板、软弱土层、相对持力层;钢筋混凝土隔水板的位置接近止水帷幕底端,钢筋混凝土隔水板与止水帷幕之间形成封闭防水空间;钢筋混凝土隔水板与支护桩通过连接钢筋连接,钢筋混凝土隔水板上间隔布孔,相对持力层内经该孔穿插着抗浮锚杆。本实用新型涉及的结构具有良好的承载及抗浮性能,对筏板及桩筏连接处的破坏小,底板不易渗漏,施工速度快,造价低等特点,具有较好的技术经济效益。
The utility model relates to a pile-raft foundation anti-floating structure, in which the side wall of the basement is connected with the supporting piles through horizontal connecting steel bars; bored piles are drilled under the basement floor; gravel pads are arranged under the basement floor from top to bottom. layer, backfill lime soil layer, reinforced concrete water-repelling board, weak soil layer, and relative bearing layer; the position of the reinforced concrete water-repelling board is close to the bottom of the water-stop curtain, and a closed waterproof space is formed between the reinforced concrete water-baffle board and the water-stop curtain The reinforced concrete water baffle and the support pile are connected by connecting steel bars, and the reinforced concrete water baffle is arranged with holes at intervals, and anti-floating anchor rods are interspersed through the holes in the relative bearing layer. The structure involved in the utility model has good load-bearing and anti-floating performance, little damage to the joints of the raft and the pile-raft, the bottom plate is not easy to leak, the construction speed is fast, the cost is low, and the technical and economic benefits are good.
Description
技术领域 technical field
本实用新型涉及一种桩筏基础抗浮结构及施工方法,施工快速、造价低廉、具有抗浮能力,属于建筑工程领域。 The utility model relates to an anti-floating structure and a construction method of a pile raft foundation, which has fast construction, low cost and anti-floating ability, and belongs to the field of construction engineering.
背景技术 Background technique
出于扩展使用功能和开发地下空间的目的,高层建筑物一般设计有较大平面尺寸和深度的地下室。然而,在地下土层含水丰富的沿海城市,由地下水浮力所造成的建筑物、构筑物等上部结构发生倾斜、倒塌的事故屡屡出现,使得地下室抗浮问题显得日益突出。 For the purpose of expanding the use of functions and developing underground space, high-rise buildings are generally designed with basements with larger plan dimensions and depths. However, in the coastal cities where the underground soil is rich in water, the buoyancy of the groundwater causes the superstructures such as buildings and structures to tilt and collapse frequently, which makes the problem of anti-floating of the basement increasingly prominent.
桩筏基础是桩基础和筏板基础的有机结合,兼具桩基础和筏板基础的特点:整体刚度大、承载力高、抗变形能力强、抗震性能好,可有效避免结构发生不均匀沉降,已被广泛应用于高层或超高层建筑,亦可用于机场港口、大型物流堆场的地基处理项目。 Pile-raft foundation is an organic combination of pile foundation and raft foundation, and has the characteristics of both pile foundation and raft foundation: large overall rigidity, high bearing capacity, strong deformation resistance, and good seismic performance, which can effectively avoid uneven settlement of the structure , has been widely used in high-rise or super high-rise buildings, and can also be used in foundation treatment projects of airport ports and large logistics yards.
现有的大型桩筏结构常用的抗浮措施有三种:一是压载抗浮技术,即在地下室底板上施加配重或增大底板的厚度来抵消地下水对筏板的浮力,增加底板厚度对地下结构抗浮很有效,但基础埋深势必增加,地下水浮力也相应增加,因此,抗浮设计难度较大,施工效果很难达到设计要求;二是设置抗拔锚杆,抗拔锚杆通过自身抗拉将地下室结构整体和岩层或者坚硬土层拉住,筏板基础下通常满堂布置抗拔锚杆,因此抗拔锚杆使用量很大,易造成建筑材料的浪费;因为长期与地下水接触,因此对抗拔锚杆的防腐要求很高,且抗拔锚杆不能承受向下的荷载;三是抗浮桩技术,抗浮桩利用桩体自重和桩侧摩阻力来提供抗浮力,由于桩与柱子相连,使抗浮桩的间距太大,需要很厚的底板才能抵抗浮力产生的附加弯矩和剪力,因此除桩的造价高外底板的造价也很高。 There are three commonly used anti-floating measures for existing large-scale piled raft structures: one is ballast anti-floating technology, that is, adding counterweight to the basement floor or increasing the thickness of the floor to offset the buoyancy of groundwater on the raft, increasing the thickness of the floor The anti-floating of underground structures is very effective, but the buried depth of the foundation will inevitably increase, and the buoyancy of groundwater will also increase accordingly. Therefore, the anti-floating design is more difficult, and the construction effect is difficult to meet the design requirements; Its own tensile strength pulls the basement structure as a whole and the rock layer or hard soil layer. Under the raft foundation, uplift anchors are usually arranged all over the house, so the use of uplift anchors is large, which is easy to cause waste of building materials; because of long-term contact with groundwater , so the anti-corrosion requirements of the anti-uplift anchor are very high, and the anti-uplift anchor cannot bear the downward load; the third is the anti-floating pile technology, the anti-floating pile uses the pile body's own weight and pile side friction to provide anti-buoyancy, because the pile Connected with the column, the distance between the anti-floating piles is too large, and a thick bottom plate is needed to resist the additional bending moment and shear force generated by the buoyancy. Therefore, the cost of the pile is high and the cost of the bottom plate is also high.
综上所述,现有的桩筏基础抗浮结构虽然在抗浮性能和防渗性能方面取得了显著的效果,减少了地下水位的不断变化对地下室侧墙及底板造成的破坏,但仍存可改善之处,主要体现在施工难度相对较大、施工成本高等方面。在地下水位较高地区,随着地下室深度的增加,对桩基及筏板的抗浮及防渗提出了更高的要求。 To sum up, although the existing pile-raft foundation anti-floating structure has achieved remarkable results in anti-floating performance and anti-seepage performance, and has reduced the damage caused by the continuous change of groundwater level to the basement side wall and floor, there are still some problems. The areas that can be improved are mainly reflected in the relatively high construction difficulty and high construction cost. In areas with a high groundwater level, as the depth of the basement increases, higher requirements are put forward for the anti-floating and anti-seepage of pile foundations and rafts.
鉴于此,目前亟需发明一种施工质量可靠、施工速度快、造价相对较低的桩筏基础抗浮结构。 In view of this, there is an urgent need to invent a pile-raft foundation anti-floating structure with reliable construction quality, fast construction speed and relatively low cost.
实用新型内容 Utility model content
本实用新型的目的在于提供一种具有良好的承载及抗浮性能,可有效减少地下水位变化对桩与筏板连接处的损坏的桩筏基础抗浮结构及施工方法。 The purpose of the utility model is to provide a pile-raft foundation anti-floating structure and construction method with good load-bearing and anti-floating performance, which can effectively reduce the damage to the connection between piles and raft slabs caused by groundwater level changes.
为了实现上述技术目的,本实用新型采用了以下技术方案: In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:
一种桩筏基础抗浮结构,地下室侧墙与支护桩通过横向的连接钢筋连接;地下室底板下打设有钻孔灌注桩;地下室侧墙与地下室底板之间的空隙处填充自密实防水混凝土; An anti-floating structure of a piled raft foundation, the side wall of the basement and the support pile are connected by horizontal connecting steel bars; bored piles are drilled under the basement floor; the gap between the side wall of the basement and the basement floor is filled with self-compacting waterproof concrete ;
地下室底板下方从上至下依次为碎石垫层、回填灰土层、钢筋混凝土隔水板、软弱土层、相对持力层; Below the basement floor, from top to bottom, there are crushed stone cushion, backfill lime soil layer, reinforced concrete water barrier, weak soil layer, and relative bearing layer;
钢筋混凝土隔水板的高于止水帷幕最下端1m以上,钢筋混凝土隔水板与止水帷幕之间形成封闭防水空间; The reinforced concrete baffle is more than 1m higher than the lower end of the water-stop curtain, and a closed waterproof space is formed between the reinforced concrete baffle and the water-stop curtain;
钢筋混凝土隔水板与支护桩通过连接钢筋连接,钢筋混凝土隔水板与支护桩连接处设置活性材料隔水体; Reinforced concrete baffles and support piles are connected by connecting steel bars, and active material water barriers are set at the joints between reinforced concrete baffles and support piles;
混凝土隔水板上间隔布孔,经孔穿插抗浮锚杆至相对持力层,钢筋混凝土隔水板与钻孔灌注桩连接处设置有遇水膨胀止水条。 Holes are arranged at intervals on the concrete water baffle, and anti-floating anchor rods are inserted through the holes to the relative bearing layer. Water-swelling water-stop strips are arranged at the connection between the reinforced concrete water baffle and the bored pile.
连接地下室侧墙和支护桩的连接钢筋沿着支护桩等间距布置,且该连接钢筋与地下室侧墙内的钢筋焊接; The connecting steel bars connecting the side walls of the basement and the supporting piles are arranged at equal intervals along the supporting piles, and the connecting steel bars are welded to the reinforcing bars in the side walls of the basement;
碎石垫层厚度为300~500mm,碎石垫层内预先埋设有水位探测器和排水管,排水管的一端延伸集水槽。 The thickness of the crushed stone cushion is 300~500mm. A water level detector and a drainage pipe are pre-buried in the crushed stone cushion. One end of the drainage pipe extends to the sump.
本实用新型具有以下的特点和有益效果:The utility model has the following characteristics and beneficial effects:
(1)桩筏基础抗浮结构设置连续的钢筋混凝土隔水板,钢筋混凝土隔水板浇筑在止水帷幕的布置范围内,形成封闭的隔水层,防止钢筋混凝土隔水板以下地下水进入回填灰土层中,减小地下水位变化对桩筏的影响。 (1) The anti-floating structure of the piled raft foundation shall be provided with continuous reinforced concrete water barriers, and the reinforced concrete water barriers shall be poured within the layout range of the water-stop curtain to form a closed water barrier to prevent groundwater below the reinforced concrete water barriers from entering the backfill In the lime soil layer, the impact of groundwater level changes on pile rafts is reduced.
(2)回填灰土层使得建筑物能均匀沉降,对抗地下水的浮力,大幅度减少抗浮锚杆的使用量,节约施工成本。 (2) Backfilling the lime soil layer enables the building to settle evenly, resists the buoyancy of groundwater, greatly reduces the use of anti-floating anchors, and saves construction costs.
(3)地下室底板顶部设置一层碎石垫层,碎石垫层内设置排水管和水位探测器,地下水位渗漏时易被发现,并可及时进行排水措施。 (3) A layer of crushed stone cushion is set on the top of the basement floor, and drainage pipes and water level detectors are installed in the crushed stone cushion. When the groundwater level leaks, it is easy to be found, and drainage measures can be taken in time.
(4)钻孔灌注桩与钢筋混凝土隔水板连接处设置橡胶止水带,橡胶止水带遇水后膨胀,阻止地下水上升从交接处缝隙中渗漏至回填灰土层。 (4) A rubber waterstop is installed at the connection between the bored pile and the reinforced concrete water barrier, and the rubber waterstop expands when exposed to water to prevent groundwater from rising and leaking from the junction gap to the backfill lime soil layer.
附图说明图1 是本实用新型桩筏基础抗浮结构示意图; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of the anti-floating structure of the piled raft foundation of the present invention;
图中:1、软弱土层;2、支护桩;3、止水帷幕;4、钻孔灌注桩;5、钢筋混凝土隔水板;6、橡胶止水带;7、抗浮锚杆;8、灰土层;9、碎石垫层;10、排水管;11、连接钢筋;12、地下室侧墙;13、地下室底板;14、自密实防水混凝土;15、活性材料隔水体;16、相对持力层;17、锚杆注浆体。 In the figure: 1. Weak soil layer; 2. Supporting pile; 3. Water-stop curtain; 4. Bored pile; 5. Reinforced concrete water barrier; 6. Rubber waterstop; 7. Anti-floating anchor rod; 8. Lime soil layer; 9. Gravel cushion; 10. Drainage pipe; 11. Connecting steel bar; 12. Basement side wall; 13. Basement floor; 14. Self-compacting waterproof concrete; 15. Active material water-proof body; 16. Relative Bearing layer; 17. Bolt grouting body.
具体实施方式 Detailed ways
本实施方式中支护桩和钻孔灌注桩的施工工艺、连接钢筋的引孔施工、抗浮锚杆的施工工艺、钢筋混凝土隔水板和地下室底板的浇筑施工工艺等本实施例中不再累述,重点阐述本实用新型涉及结构的实施方式。 In this embodiment, the construction technology of support piles and bored cast-in-place piles, the construction of leading holes for connecting steel bars, the construction technology of anti-floating anchor rods, the construction technology of reinforced concrete water barriers and the pouring construction technology of basement bottom slabs will not be included in this embodiment. Recite, emphatically set forth the embodiment that the utility model relates to structure.
图1 是本实用新型桩伐基础抗浮结构示意图。参照图1所示,本实用新型桩伐基础抗浮结构主要由止水帷幕3、支护桩2、钢筋混凝土隔水板5、钻孔灌注桩4、碎石垫层9及抗浮锚杆7组成。 Fig. 1 is the schematic diagram of the anti-floating structure of the pile cutting foundation of the present invention. With reference to shown in Fig. 1, the anti-floating structure of the piling foundation of the utility model is mainly composed of a water-stop curtain 3, a support pile 2, a reinforced concrete water barrier 5, a bored pile 4, a crushed stone cushion 9 and an anti-floating anchor rod. 7 composition.
在基坑四周设置一排支护桩2,支护桩2采用深层搅拌桩,桩径600mm,桩间距450mm,桩长9m,桩身混凝土采用C25混凝土,主筋8Φ18,加劲箍φ12200;止水帷幕3采用连续的水泥搅拌桩,桩径为250mm,桩顶距地表3.5m,桩底位于地下水位以下。 Set up a row of supporting piles 2 around the foundation pit. The supporting piles 2 are deep mixing piles with a pile diameter of 600mm, a pile spacing of 450mm, and a pile length of 9m. 3 Continuous cement mixing piles are adopted, the pile diameter is 250mm, the pile top is 3.5m away from the ground surface, and the bottom of the pile is located below the groundwater level.
钻孔灌注桩4为圆形,桩体直径为600mm,桩间距为3m,桩体穿过软弱土层1,伸入相对持力层16内1m以上;钻孔灌注桩4内钢筋笼的直径为500mm,设置12根Ф16mm、强度等级HRB335纵向螺纹钢筋,螺旋箍筋采用Ф8mm、强度等级为HPB300的光面钢筋。钻孔灌注桩4的混凝土强度等级为C35,采用42.5#普通硅酸盐水泥。钻孔灌注桩4的施工满足《建筑桩基技术规范》(JGJ94-2008)的要求。 The bored cast-in-place pile 4 is circular, the diameter of the pile body is 600mm, and the distance between the piles is 3m. The pile body passes through the soft soil layer 1 and extends into the relative bearing layer 16 for more than 1m; 500mm, set 12 Ф16mm, strength grade HRB335 longitudinal threaded steel bars, spiral stirrups use Ф8mm, strength grade HPB300 smooth steel bars. The concrete strength grade of the bored pile 4 is C35, and 42.5# ordinary Portland cement is used. The construction of bored pile 4 meets the requirements of "Technical Specifications for Building Pile Foundations" (JGJ94-2008).
钢筋混凝土隔水板5采用防渗混凝土浇筑而成,水泥采用普通硅酸盐水泥,强度不低于32.5Mpa,水泥的7天水化热指标不高于275kJ/kg,不得使用早强水泥,水泥的碱含量须满足每立方米混凝土中水泥的总碱量不大于2.25kg,添加的粉煤灰的级别不低于II级,不得使用高钙粉煤灰,粗骨料采用5~31.5mm级配均匀的机碎石,含泥量不得大于1%,细骨料采用中粗砂,细度模数2.5~3.0。砂的含泥量不得大于3%。混凝土内添加外加剂,外加剂应采用低碱、低水化热的外加剂,掺量不大于水泥质量的5%。 Reinforced concrete water baffle 5 is poured with anti-seepage concrete. The cement is ordinary Portland cement with a strength of not less than 32.5Mpa. The 7-day hydration heat index of the cement is not higher than 275kJ/kg. Early-strength cement and cement are not allowed. The alkali content of the cement must meet the total alkali content of cement per cubic meter of concrete is not more than 2.25kg, the grade of the added fly ash is not lower than grade II, high calcium fly ash is not allowed, and the coarse aggregate is 5~31.5mm grade Mix uniform crushed stone, the mud content shall not be greater than 1%, the fine aggregate shall be medium-coarse sand, and the fineness modulus shall be 2.5~3.0. The mud content of the sand shall not exceed 3%. The admixture is added to the concrete, and the admixture should be admixture with low alkali and low heat of hydration, and the admixture should not exceed 5% of the cement mass.
钢筋混凝土隔水板5与支护桩2相互垂直设置,两者采用连接钢筋11连接,连接钢筋11采用钢筋植筋的孔径为20mm,且连接处铺设外包土工布袋的活性材料隔水体15,活性材料隔水体15为高分子树脂活性防水材料。钻孔灌注桩4贯穿了钢筋混凝土隔水板5,钢筋混凝土隔水板5与钻孔灌注桩4之间设置橡胶止水带6,橡胶止水带6采用遇水膨胀止水条,拉伸强度≥3.5Mpa。 Reinforced concrete water barrier 5 and support pile 2 are arranged perpendicular to each other, and the two are connected by connecting steel bar 11. The connecting steel bar 11 adopts the aperture of steel bar planting bar to be 20mm, and the active material water barrier 15 of outsourcing geotechnical cloth bag is laid at the joint, and the active material The material water barrier 15 is a polymer resin active waterproof material. The bored cast-in-place pile 4 runs through the reinforced concrete water barrier 5, and a rubber waterstop 6 is set between the reinforced concrete water barrier 5 and the bored cast-in-place pile 4. Strength ≥ 3.5Mpa.
钢筋混凝土隔水板5达到一定强度后,在钢筋混凝土隔水板5上钻孔,在孔内设置抗浮锚杆7,抗拔承载力标准值为240KN,抗浮锚杆7表面进行抗腐蚀处理,抗浮锚杆7内注浆形成锚杆注浆体17。 After the reinforced concrete water baffle 5 reaches a certain strength, drill a hole on the reinforced concrete water baffle 5, and install an anti-floating anchor rod 7 in the hole. Processing, the anti-floating anchor 7 is grouted to form an anchor grouting body 17 .
待抗浮锚杆7打设完成后在钢筋混凝土隔水板5上回填灰土层8,灰土层8顶部设置碎石垫层9,碎石垫层9厚度300~500mm,碎石粒径不小于20mm。碎石垫层9内设置水位感应器,并预埋排水管10,排水管10采用内径100~200mm的混凝土管。 After the installation of the anti-floating anchor 7 is completed, the lime soil layer 8 is backfilled on the reinforced concrete water barrier 5, and the crushed stone cushion layer 9 is arranged on the top of the lime soil layer 8. 20mm. A water level sensor is arranged in the gravel cushion 9, and a drain pipe 10 is pre-buried, and the drain pipe 10 adopts a concrete pipe with an inner diameter of 100-200mm.
然后进行地下室底板13和地下室侧墙12的施工,地下室底板13和地下室侧墙12的钢筋采用直径为16mm,强度等级为HRB335的螺纹钢筋,厚度为400mm,混凝土强度等级为C30,其中,地下室侧墙12与支护桩2采用直径为20mm,强度等级为HRB335的连接钢筋11连接。地下室侧墙12与支护桩2的空隙内填充自密实防水混凝土14,自密实防水混凝土14的黏度用混凝土的扩展度表示,要求在500~700mm范围内。 Carry out the construction of basement bottom plate 13 and basement side wall 12 then, the reinforcing bar of basement bottom plate 13 and basement side wall 12 adopts diameter to be 16mm, strength grade is the threaded steel bar of HRB335, thickness is 400mm, concrete strength grade is C30, wherein, basement side The wall 12 and the support pile 2 are connected by connecting steel bars 11 with a diameter of 20 mm and a strength grade of HRB335. The gap between the basement side wall 12 and the support pile 2 is filled with self-compacting waterproof concrete 14, and the viscosity of the self-compacting waterproof concrete 14 is expressed by the degree of expansion of the concrete, which is required to be within the range of 500-700mm.
本实用新型还提供了桩筏基础抗浮结构的施工方法,主要包括以下步骤: The utility model also provides a construction method for the anti-floating structure of the piled raft foundation, which mainly includes the following steps:
1)钻孔灌注桩施工:基坑开挖至设计标高后,打设钻孔灌注桩4,钻孔灌注桩4浇筑完成后养护28天,使钻孔灌注桩4达到设计强度; 1) Construction of bored piles: After the foundation pit is excavated to the design elevation, the bored piles 4 are drilled, and the bored piles 4 are poured and then maintained for 28 days to make the bored piles 4 reach the design strength;
2)开挖原土层:将基坑继续下挖3~6m,基坑底部标高比止水帷幕3底部高1m; 2) Excavate the original soil layer: continue to dig the foundation pit for 3~6m, and the elevation of the bottom of the foundation pit is 1m higher than the bottom of the water-stop curtain 3;
3)在基坑底部浇筑钢筋混凝土隔水板5:施工钢筋混凝土隔水板5前,先对钻孔灌注桩4接近基坑的部分抹浆做光滑处理、外包橡胶止水带6。在支护桩2上与钢筋混凝土隔水板5连接的部位钻孔并设置连接钢筋11。做好准备工作做好,铺设钢筋混凝土隔水板5的钢筋网,钢筋网四周与设置在支护桩2上的连接钢筋11焊接,钢筋网安装完成后支模浇筑防水混凝土,待混凝土强度达到要求后在支护桩2与钢筋混凝土隔水板5连接处设置活性材料隔水体15。 3) Pour reinforced concrete water barrier 5 at the bottom of the foundation pit: before constructing reinforced concrete water barrier 5, smooth the part of bored pile 4 close to the foundation pit with grout, and outsource rubber waterstop 6. Bore holes are drilled at the positions connected to the reinforced concrete water barrier 5 on the support pile 2 and the connecting steel bars 11 are arranged. Do the preparation work well, lay the reinforced mesh of the reinforced concrete water barrier 5, weld the surrounding reinforced mesh with the connecting steel bars 11 arranged on the support pile 2, form the waterproof concrete after the reinforced mesh is installed, and wait for the concrete strength to reach After the requirement, an active material water barrier 15 is set at the joint between the support pile 2 and the reinforced concrete water barrier 5 .
4)打设抗浮锚杆7:待浇筑钢筋混凝土隔水板5混凝土强度达到要求后在钢筋混凝土隔水板5上钻孔并插入预制的抗浮锚杆7至相对持力层16以下1m以上,然后向抗浮锚杆7内注浆形成锚杆注浆体17,注浆方式采用二次注浆,第一次注浆压力0.5~1.0MPa,通过注浆管自孔底注浆,注浆至孔口不冒浆为止;第二次注浆压力1.5~3.0MPa。前后两次注浆间隔时间为12h; 4) Install anti-floating anchor rod 7: After the concrete strength of reinforced concrete water baffle 5 meets the requirements, drill holes on reinforced concrete water baffle 5 and insert the prefabricated anti-floating anchor 7 to 1m below the relative bearing layer 16 Above, then grouting into the anti-floating anchor 7 to form the anchor grouting body 17, the grouting method adopts secondary grouting, the first grouting pressure is 0.5-1.0MPa, grouting from the bottom of the hole through the grouting pipe, Inject grout until the orifice does not emit grout; the second grouting pressure is 1.5-3.0MPa. The interval between two grouting before and after is 12h;
5)回填灰土层8:分层回填灰土层8,每回填一层灰土层8需对回填部分进行压实,回填施工至地下室底板标高; 5) Backfill lime soil layer 8: backfill lime soil layer 8 layer by layer, each layer of lime soil layer 8 needs to be compacted, and backfill construction to the basement floor elevation;
6)铺设碎石垫层9:灰土层8铺设完成后铺设300~500mm的碎石垫层9,碎石垫层9内预先埋设水位探测器和排水管10,排水管均匀布设,一端延伸至地下室周围的集水槽中; 6) Laying gravel cushion 9: After the lime soil layer 8 is laid, a 300-500mm gravel cushion 9 is laid. Water level detectors and drainage pipes 10 are pre-buried in the gravel cushion 9. The drainage pipes are evenly laid out, and one end extends to In the sump around the basement;
7)地下室底板13及地下室侧墙12浇筑:地下室侧墙12施工前,先在支护桩2上引孔植入连接钢筋11,然后铺设地下室底板13和地下室侧墙12的钢筋,地下室侧墙12钢筋与连接钢筋11焊接,最后浇筑地下室底板13和地下室侧墙12混凝土。最后在地下室侧墙12与支护桩2空隙处填充自密实防水混凝土14。 7) Pouring of basement floor 13 and basement side wall 12: Before construction of basement side wall 12, first insert connecting steel bar 11 into the guide hole on support pile 2, and then lay reinforcement for basement floor 13 and basement side wall 12, basement side wall The 12 steel bars are welded with the connecting steel bars 11, and finally the basement floor 13 and the basement side wall 12 are poured into concrete. Finally, the self-compacting waterproof concrete 14 is filled in the gap between the basement side wall 12 and the support pile 2 .
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104452829A (en) * | 2014-11-18 | 2015-03-25 | 中大建设有限公司 | Piled raft foundation anti-floating structure and construction method |
CN111501815A (en) * | 2020-04-01 | 2020-08-07 | 中国建筑第八工程局有限公司 | Tower crane foundation structure replacing anti-floating anchor rod and construction method |
CN111719596A (en) * | 2020-07-24 | 2020-09-29 | 沈阳促晋科技有限公司 | Underground structure reinforcement system with both bearing capacity and anti-floating capacity |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104452829A (en) * | 2014-11-18 | 2015-03-25 | 中大建设有限公司 | Piled raft foundation anti-floating structure and construction method |
CN111501815A (en) * | 2020-04-01 | 2020-08-07 | 中国建筑第八工程局有限公司 | Tower crane foundation structure replacing anti-floating anchor rod and construction method |
CN111719596A (en) * | 2020-07-24 | 2020-09-29 | 沈阳促晋科技有限公司 | Underground structure reinforcement system with both bearing capacity and anti-floating capacity |
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