WO2017133373A1 - Small-diameter pile cluster used for pile foundation, and method for construction thereof - Google Patents

Small-diameter pile cluster used for pile foundation, and method for construction thereof Download PDF

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WO2017133373A1
WO2017133373A1 PCT/CN2017/000141 CN2017000141W WO2017133373A1 WO 2017133373 A1 WO2017133373 A1 WO 2017133373A1 CN 2017000141 W CN2017000141 W CN 2017000141W WO 2017133373 A1 WO2017133373 A1 WO 2017133373A1
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pile
diameter
soil
construction
small
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PCT/CN2017/000141
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French (fr)
Chinese (zh)
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王继忠
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王继忠
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Priority to CN201610081588.7A priority Critical patent/CN105649099A/en
Priority to CN201610081588.7 priority
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Publication of WO2017133373A1 publication Critical patent/WO2017133373A1/en

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations

Abstract

Provided is a small-diameter pile cluster used for a pile foundation; the small-diameter pile cluster consists of two or more small-diameter piles; the pile tops make contact with each other or fit together, such that the diameter of the piles consituting the pile cluster is smaller than 800 mm. Also provided is a method for constructing a small-diameter pile cluster used for a pile foundation.

Description

一种用于桩基的小直径桩簇及其施工方法Small diameter pile cluster for pile foundation and construction method thereof 技术领域Technical field
本申请涉及一种桩基形式及其施工方法,具体是一种用于桩基的小直径桩簇及其施工方法。The invention relates to a pile foundation form and a construction method thereof, in particular to a small diameter pile cluster for a pile foundation and a construction method thereof.
背景技术Background technique
在现有的桩基施工技术领域中,通常分为端承桩和摩擦桩两种,其主要按照桩端受力还是桩周受力进行划分,当然有些桩的受力形式也介于两种桩型之间。随着建筑技术的发展,对于桩基承载力的要求越来越大,当对桩的承载力提出更高要求时,无论端承桩还是摩擦桩,往往都通过增大桩的直径和长度的方式来增加桩端和桩侧的受力面积,以提高单桩承载力,现有技术中直径在1500mm以上的桩已经屡见不鲜。但由此也产生一些问题,首先为了增加侧阻端阻面积而增大桩径使桩基本身材料的抗压强度极大地浪费;其次目前大直径桩基的施工均为排土法且多采用泥浆护壁,不仅没有利用原土并且产生大量的渣土和泥浆需要外弃和处理,增加了施工成本也带来了施工的环境污染;再次随着桩径的扩大,相应的施工成本越来越高,施工的技术难度越来越大。In the field of existing pile foundation construction technology, it is usually divided into two types: end bearing pile and friction pile. It is mainly divided according to pile end force or pile circumference force. Of course, some piles are also subjected to two pile types. between. With the development of building technology, the requirements for the bearing capacity of the pile foundation are getting larger and larger. When the bearing capacity of the pile is put forward higher, both the end bearing pile and the friction pile often increase the diameter and length of the pile. The method is to increase the bearing area of the pile end and the pile side to improve the bearing capacity of the single pile. In the prior art, the pile having a diameter of 1500 mm or more has been frequently seen. However, some problems have arisen. Firstly, in order to increase the area of the side resistance and increase the pile diameter, the compressive strength of the basic material of the pile is greatly wasted. Secondly, the construction of the large diameter pile foundation is the method of dumping and is mostly adopted. The mud retaining wall not only does not use the original soil and generates a large amount of muck and mud, which needs to be discarded and treated, which increases the construction cost and brings environmental pollution to the construction. Once the pile diameter is expanded, the corresponding construction cost is more and more High, the technical difficulty of construction is getting bigger and bigger.
发明内容Summary of the invention
本发明是为了解决上述的问题而提出的,目的在于提供一种既能够获得大的受力面积,同时还能节约成本、环保无污染的桩基及其施工方法,即一种用于桩基的小直径桩簇及其施工方法。The present invention has been made to solve the above problems, and an object thereof is to provide a pile foundation capable of obtaining a large force receiving area while saving cost, environmental protection and pollution-free, and a construction method thereof, that is, a pile foundation Small diameter piles and their construction methods.
为了实现上述目的,本发明的一种用于桩基的小直径桩簇,其特征在于,该小直径桩簇由两根以上小直径桩组成,桩顶和桩顶之间相互接触或咬合;即:以桩顶相互接触或者咬合的多根小直径的桩组成较大直径的桩簇,替代原本一根的直径更大的桩。In order to achieve the above object, a small-diameter pile cluster for a pile foundation according to the present invention is characterized in that the small-diameter pile cluster is composed of two or more small-diameter piles, and the pile top and the pile top are in contact with each other or bite; That is, a plurality of small-diameter piles that are in contact with each other or bite at the top of the pile constitute a pile of larger diameter, replacing the original larger diameter pile.
上述用于桩基的小直径桩簇中,组成桩簇的桩的直径小于800mm。In the above-mentioned small-diameter piles for pile foundations, the piles constituting the piles have a diameter of less than 800 mm.
上述用于桩基的小直径桩簇中,桩簇的桩周预先搅土,并向桩周土体中喷射水泥浆进行固化;其目的和作用一是提高桩周土体的强度,二是便于后续的小直径桩的施工。In the above-mentioned small-diameter piles for pile foundation, the piles of the piles are pre-mixed with soil, and the cement slurry is sprayed into the soil around the piles for solidification; the purpose and function of the piles is to increase the strength of the soil around the piles, and secondly, Facilitate the construction of subsequent small diameter piles.
上述用于桩基的小直径桩簇中,组成桩簇的桩包括现制桩和预制桩;现制桩是指现场浇注的包含钢筋的混凝土桩,预制桩包括提前制作好的钢筋混凝土实心桩、预应力管桩。In the above-mentioned small-diameter piles for pile foundation, the piles forming the pile clusters include the existing piles and the precast piles; the existing piles refer to the concrete piles containing the steel bars cast on site, and the precast piles include the reinforced concrete solid piles prepared in advance. Prestressed pipe piles.
上述用于桩基的小直径桩簇中,桩簇中的桩包括桩端载体,主要用于承载和传递竖向力;桩端载体由干硬性混凝土、夯实的加固料和挤密土体组成。In the above-mentioned small-diameter piles for pile foundations, the piles in the piles include pile end carriers, which are mainly used for carrying and transmitting vertical forces; the pile end carriers are composed of dry hard concrete, tamping reinforcement materials and compacted soils. .
本发明还包括一种进行如上述的用于桩基的小直径桩簇的施工方法,其特征在于, (1)根据设计要求预定桩位;(2)在桩位上同时或者先后进行小直径桩施工。The present invention also includes a construction method for performing a small-diameter pile cluster for a pile foundation as described above, characterized in that (1) Predetermine the pile position according to the design requirements; (2) Simultaneously or sequentially carry out small-diameter pile construction on the pile position.
上述的施工方法中,在施工小直径桩之前,先对桩周土体进行不出土搅拌,同时向土体中喷射水泥浆,形成水泥土桩;其施工方式包括深层搅拌或者高压旋喷;In the above construction method, before the construction of the small-diameter pile, the soil around the pile is firstly stirred without soiling, and at the same time, the cement slurry is sprayed into the soil to form a cement soil pile; the construction method includes deep mixing or high-pressure rotary spraying;
上述的施工方法中,水泥土桩通过一次或者分多次完成,最终成型的水泥土桩的直径大于或者等于桩簇的最大直径;其目的和作用是使桩簇的外周被水泥土桩充分包裹。In the above construction method, the cement soil pile is completed once or several times, and the diameter of the finally formed cement soil pile is greater than or equal to the maximum diameter of the pile cluster; the purpose and function is to fully wrap the outer circumference of the pile cluster with the cement soil pile .
上述的施工方法中,在水泥土桩强度达到初凝之前,进行小直径桩施工;其目的和作用是便于和提高小直径桩施工时的挤土成孔的速度和工效。In the above construction method, the construction of the small-diameter pile is carried out before the strength of the cement-soil pile reaches the initial setting; the purpose and function are to facilitate and improve the speed and work efficiency of the compaction and hole formation during the construction of the small-diameter pile.
上述的施工方法中,在进行小直径桩的桩身施工之前,通过重锤或者夯管的升降运动对桩端土体或者向桩端填入的加固料进行夯击,经过多次夯击后使桩端下一定深度和范围内的土体被加固密实,并以实测贯入度或者设定的填料量为控制标准检验桩端密实度,从而形成桩端载体。In the above construction method, before the pile body construction of the small-diameter pile is carried out, the pile end soil or the reinforcement material filled into the pile end is slammed by the lifting movement of the weight or the fistula pipe, after multiple slamming The soil at a certain depth and range under the pile end is reinforced and compacted, and the pile end density is checked by the measured penetration degree or the set filler amount as a control standard, thereby forming a pile end carrier.
上述的施工方法中,以实测贯入度或者设定的填料量为控制标准,实测贯入度是指在不填料的情况下重锤或者夯管空打3击~10击的下沉数值,设定的填料量在0.1~1.8m3范围内。In the above construction method, the measured penetration degree or the set amount of the filler is used as the control standard, and the measured penetration degree refers to the sinking value of the weight of the hammer or the tube by 3 to 10 hits without the filler. The amount of the filler to be set is in the range of 0.1 to 1.8 m 3 .
上述的施工方法中,向桩端填入的加固料,包括干硬性混凝土或碎砖或碎石或渣土或卵石或钢渣或水泥土或灰土中的一种或几种。In the above construction method, the reinforcing material filled into the pile end includes one or more of dry hard concrete or broken brick or gravel or muck or pebbles or steel slag or cement soil or ash soil.
该用于桩基的小直径桩簇及其施工方法的特点和优势在于:The characteristics and advantages of the small-diameter pile cluster for pile foundation and its construction method are as follows:
①以桩顶相互接触或者咬合的多根小直径的桩组成较大直径的桩簇,替代原本一根的直径更大的桩,这种由多根小直径桩组成的桩簇在桩身断面相等的情况下,比单一桩的侧阻面积增加40%以上。1 A plurality of small-diameter piles which are in contact with each other or bite at the top of the pile constitute a larger diameter pile, instead of the original larger diameter pile, the pile consisting of a plurality of small diameter piles in the pile section In the case of equality, the area of the side resistance of the single pile is increased by more than 40%.
②除上述增加桩身侧阻面积之外,还通过以下多个方面进一步提高桩的承载力:一是对桩端的土体或者填入的加固料进行夯实挤密,使桩端以下深度3~5米、直径2~3米范围内的土体被挤密,形成桩端载体,使桩端受力面积显著增大;二是在夯实过程中对桩底虚土沉渣进行了有效处理;三是无论地基土体如何局部变化,所有的桩基均采用相同的标准控制桩端密实度,因此显著降低沉降值偏差,从而有效避免不均匀沉降;四是小直径桩簇是在水泥土桩内部挤土施工,挤土过程起到扩大桩径、提高桩周土密度作用;五是水泥土桩在达到终凝强度后,其固结硬化效果进一步提高桩体强度;综合以上五个方面,使得该小直径桩簇的整体承载能力,相比单一桩提高50%以上。2 In addition to the above-mentioned increase of the lateral resistance area of the pile body, the bearing capacity of the pile is further improved by the following aspects: First, the soil at the pile end or the filled reinforcement material is compacted and compacted, so that the depth below the pile end is 3~ The soil within 5 meters and the diameter of 2 to 3 meters is compacted to form the pile end carrier, which significantly increases the force area of the pile end; the second is to effectively treat the soil at the bottom of the pile during the compaction process; Regardless of how the foundation soil changes locally, all pile foundations use the same standard to control the pile end compactness, thus significantly reducing the settlement value deviation, thus effectively avoiding uneven settlement; Fourth, the small diameter pile cluster is inside the cement soil pile Excavation construction, soil compaction process to enlarge the pile diameter and increase the soil density around the pile; fifth, after the cement soil pile reaches the final set strength, its consolidation hardening effect further increases the pile strength; The overall bearing capacity of the small-diameter piles is increased by more than 50% compared to a single pile.
③通过以下多个方面提高工效,降低施工难度:其一,施工一根大直径桩的困难来源于多个方面,必须专用的大型设备、成孔过程漫长、遇到较硬土层耗时耗力甚至无法达到 设计深度、需要泥浆固壁、需要清土外运等等,而施工一根小直径的桩对以上各方面的要求,就明显降低很多倍;其二,在施工小直径桩簇之前,先进行更大直径的水泥土桩的施工,其显著效果一是喷射水泥浆并搅拌过程中,原本难以成孔穿透的较硬土层如砂层的硬度和密度得到降低;二是小直径桩簇的施工是在水泥土初凝之前,此时利用水泥土的润滑作用,得以快速高效的进行成孔或成桩施工;综合以上因素,采用多根小直径桩簇来替代单一根大直径桩,其成本的降低和工效的提高是显而易见的。3 Improve work efficiency and reduce construction difficulty through the following aspects: First, the difficulty of constructing a large-diameter pile comes from many aspects, large-scale equipment must be used, the hole-forming process is long, and the hard soil layer consumes time. Force can't even reach The design depth, the need for mud solid wall, the need for clear soil transportation, etc., and the construction of a small diameter pile on the above requirements, it is significantly reduced many times; Second, before the construction of small diameter piles, first The construction of larger diameter cement soil piles has a significant effect. In the process of spraying cement slurry and stirring, the hardness and density of hard soil layers such as sand layers which are difficult to penetrate through holes are reduced. Second, small diameter piles The construction is carried out before the initial setting of the cement soil. At this time, the lubrication effect of the cement soil can be used to quickly and efficiently perform the hole-forming or pile-forming construction; in combination with the above factors, multiple small-diameter piles are used instead of the single large-diameter pile. The reduction in cost and improvement in work efficiency are obvious.
④施工方法中均采用不出土方式,一方面很好的利用了原土,另一方面也不产生渣土及泥浆,即减少了清土外运的环节,又避免了环境污染,具有极强的经济性和环保性。4 The construction method adopts the method of not unearthing. On the one hand, the original soil is well utilized, on the other hand, no muck and mud are generated, which reduces the link of clearing soil transportation and avoids environmental pollution. It is extremely strong. Economic and environmentally friendly.
附图说明DRAWINGS
图1~图7是本发明的由两根以上小直径桩组成桩簇的示意图,其中图a是竖剖面示意图,图b是图a的中间部位横剖面图;图1由两根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互接触,并且包括桩端载体;图2由三根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互接触;图3由三根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互咬合,并且包括桩端载体;图4由四根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互接触,并且包括桩端载体;图5由三根小直径方柱形桩组成桩簇,桩顶与桩顶之间相互接触;图6由四根小直径方柱形桩组成桩簇,桩顶与桩顶之间相互接触,并且包括桩端载体;图7由五根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互咬合。1 to 7 are schematic views of a pile cluster composed of two or more small-diameter piles of the present invention, wherein a is a vertical sectional view, and FIG. b is a cross-sectional view of the middle portion of FIG. a; FIG. 1 is composed of two small-diameter cylinders. The piles form piles, the pile tops and the pile tops are in contact with each other, and include the pile end carriers; Fig. 2 consists of three small-diameter cylindrical piles, which form a pile cluster, and the pile tops and the pile tops are in contact with each other; Figure 3 consists of three small ones. The cylindrical pile of diameter constitutes a pile of piles, the pile top and the top of the pile are interlocked with each other, and includes a pile end carrier; FIG. 4 is composed of four small-diameter cylindrical piles, and the pile top and the pile top are in contact with each other, and include Pile end carrier; Figure 5 consists of three small-diameter square-column piles, which are in contact with each other. Figure 6 consists of four small-diameter square-column piles, which are composed of piles between the pile top and the pile top. They are in contact with each other and include a pile end carrier; FIG. 7 is composed of five small-diameter cylindrical piles, and the pile top and the pile top are engaged with each other.
图8~图11是本发明的在桩周土体固化后由两根以上小直径桩组成桩簇的示意图,其中图a是竖剖面示意图,图b是图a的中间部位横剖面图;图8是桩周土体固化后由两根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互接触;图9是桩周土体固化后由三根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互接触,并且包括桩端载体;图10是桩周土体固化后由四根小直径圆柱形桩组成桩簇,桩顶与桩顶之间相互咬合,并且包括桩端载体;图11是桩周土体固化后由四根小直径方柱形桩组成桩簇,桩顶与桩顶之间相互接触。8 to FIG. 11 are schematic views showing a pile cluster composed of two or more small-diameter piles after solidification of the soil around the pile, wherein a is a vertical sectional view, and FIG. b is a cross-sectional view of the middle portion of FIG. 8 is the pile cluster formed by two small-diameter cylindrical piles after the soil around the pile is solidified, and the pile top and the pile top are in contact with each other; Figure 9 is a pile cluster composed of three small-diameter cylindrical piles after the pile surrounding soil is solidified. The pile top and the pile top are in contact with each other, and include the pile end carrier; FIG. 10 is a pile cluster composed of four small-diameter cylindrical piles after the pile surrounding soil is solidified, and the pile top and the pile top are interlocked with each other, and the pile is included End carrier; Figure 11 is a pile of four small-diameter square column piles after the soil around the pile is solidified, and the pile top and the pile top are in contact with each other.
图12是图1所述的小直径桩簇的施工方法的工序图,其中,图12a是竖剖面示意图,图12a’是图12a的中间部位的横剖面图。Fig. 12 is a process view showing a construction method of the small-diameter pile cluster shown in Fig. 1, wherein Fig. 12a is a vertical sectional view, and Fig. 12a' is a cross-sectional view of the intermediate portion of Fig. 12a.
图13是图5所述的小直径桩簇的施工方法的工序图,其中,图13a是竖剖面示意图,图13a’是图13a的中间部位的横剖面图。Fig. 13 is a process view showing a construction method of the small-diameter pile cluster shown in Fig. 5, wherein Fig. 13a is a vertical sectional view, and Fig. 13a' is a cross-sectional view of the intermediate portion of Fig. 13a.
图14是图9所述的小直径桩簇的施工方法的工序图,其中,图14a是竖剖面示意图,图14a’是图14a的中间部位的横剖面图。Fig. 14 is a process view showing a construction method of the small-diameter pile cluster shown in Fig. 9, wherein Fig. 14a is a vertical sectional view, and Fig. 14a' is a cross-sectional view of the intermediate portion of Fig. 14a.
图15是图11所述的小直径桩簇的施工方法的工序图,其中,图15a是竖剖面示意图, 图15a’是图15a的中间部位的横剖面图。Figure 15 is a process view of the construction method of the small-diameter pile cluster shown in Figure 11, wherein Figure 15a is a vertical sectional view, Figure 15a' is a cross-sectional view of the intermediate portion of Figure 15a.
具体实施方式detailed description
下面通过具体实施例对本发明作进一步说明。The invention is further illustrated by the following specific examples.
图1所述实施例由两根圆柱形桩组成最大直径900mm、长度8000mm的桩簇,桩顶与桩顶之间相互接触,并且包括桩端载体。The embodiment shown in Fig. 1 consists of two cylindrical piles of piles having a maximum diameter of 900 mm and a length of 8000 mm. The pile tops and the pile tops are in contact with each other and include pile end carriers.
图12是图1所述实施例的施工方法的工序图,首先,如图12中a所示,垂直沉入第一根直径为450mm、长度为9000mm的圆形护筒1至设定深度;然后,如图12中b所示,紧沿护筒1的侧壁沉入第二根相同规格尺寸的护筒2;然后,如图12中c所示,在护筒1和2内均填入0.2m3的加固料3;在护筒1和2内均放入重量为3.5T的细长型重锤4和5,利用重锤4和5在护筒1和2内的升降运动,对加固料3进行夯击;然后,如图12中d所示,重复进行上述填料并夯击的操作,使桩端下一定深度和范围内的土体被加固密实,并以3击贯入度为控制标准检测密实度;然后,如图12中e所示,分次在护筒1和2内均填入总量为0.4m3的干硬性混凝土6并继续用重锤4和5夯实,从而形成由干硬性混凝土、夯实的加固料和挤密土体组成的桩端载体;然后,如图12中f所示,在护筒1和2之内沉入钢筋笼7;最后,如图12中g所示,在护筒1和2之内灌注混凝土后提出护筒1和2,形成两根圆柱形桩组成最大直径900mm、长度8000mm的桩簇,桩顶与桩顶之间相互接触,并且包括桩端载体。12 is a process diagram of the construction method of the embodiment of FIG. 1. First, as shown in a of FIG. 12, the first circular casing 1 having a diameter of 450 mm and a length of 9000 mm is vertically sunk to a set depth; Then, as shown in b of FIG. 12, the second casing of the same size is sunk into the side wall of the casing 1; then, as shown by c in FIG. 12, the casings 1 and 2 are filled. Into the reinforcing material 3 of 0.2 m 3 ; the elongated weights 4 and 5 having a weight of 3.5 T are placed in the casings 1 and 2, and the lifting movements of the weights 4 and 5 in the casings 1 and 2 are utilized, The reinforced material 3 is slammed; then, as shown by d in Fig. 12, the above-mentioned packing and slamming operation are repeated, so that the soil at a certain depth and range under the pile end is reinforced and compacted, and penetrated by 3 strokes. The degree of compaction is measured for the control standard; then, as shown by e in Fig. 12, the dry hard concrete 6 with a total amount of 0.4 m 3 is filled in the casings 1 and 2, and the weights 4 and 5 are continued. , thereby forming a pile end carrier composed of dry hard concrete, tamping reinforcing material and compacted soil; then, as shown by f in Fig. 12, sinking the steel cage 7 within the casings 1 and 2; Figure 12 g It is shown that after the concrete is poured into the casings 1 and 2, the casings 1 and 2 are formed, and two cylindrical piles are formed to form a pile cluster having a maximum diameter of 900 mm and a length of 8000 mm, and the pile top and the pile top are in contact with each other, and include piles. End carrier.
图5所述实施例是由三根方柱形桩组成最大直径800mm、长度15000mm的桩簇,桩顶与桩顶之间相互接触。The embodiment shown in Fig. 5 is composed of three square-column piles of piles having a maximum diameter of 800 mm and a length of 15000 mm, and the pile tops and the pile tops are in contact with each other.
图13是图5所述实施例的施工方法的工序图,首先,如图13中a所示,垂直沉入第一根直径400mm、长度15000mm预制混凝土方桩1至设定深度;然后,如图13中b所示,紧沿并对齐方桩1的一个侧边,垂直沉入第二根相同规格尺寸的预制混凝土方桩2;然后,如图13中c所示,将方桩2沉入至与方桩1相同的设定深度;然后,如图13中d所示,在方桩1和方桩2中间位置的上方,紧沿方桩1和方桩2的共同侧边,沉入第三根相同规格尺寸的混凝土方桩3,最后,如图13中d所示,将方桩3沉入至与方桩1和方桩2相同的设定深度,形成由三根方柱形桩组成最大直径800mm、长度15000mm的桩簇,桩顶与桩顶之间相互接触。Figure 13 is a process diagram of the construction method of the embodiment of Figure 5, first, as shown in a of Figure 13, vertically sunk into the first precast concrete square pile 1 having a diameter of 400 mm and a length of 15,000 mm to a set depth; As shown by b in Fig. 13, a side edge of the square pile 1 is tightly aligned and aligned, and a second precast concrete square pile 2 of the same size is vertically sunk; then, as shown by c in Fig. 13, the square pile 2 is sunken. Into the same set depth as the square pile 1; then, as shown by d in Fig. 13, above the intermediate position of the square pile 1 and the square pile 2, close to the common side of the square pile 1 and the square pile 2, sink Into the third concrete square pile 3 of the same size, and finally, as shown by d in Fig. 13, the square pile 3 is sunk to the same set depth as the square pile 1 and the square pile 2, and is formed into three square columns. The piles are composed of piles with a maximum diameter of 800 mm and a length of 15,000 mm, and the pile tops and the pile tops are in contact with each other.
图9所述实施例是由三根圆柱形桩组成最大直径1200mm、长度12000mm的桩簇,桩簇的桩周土体固化范围最大直径1600mm、长度12000mm,桩顶与桩顶之间相互接触,并且包括桩端载体。 The embodiment shown in FIG. 9 is composed of three cylindrical piles, the piles having a maximum diameter of 1200 mm and a length of 12000 mm. The surrounding soil of the piles has a maximum diameter of 1600 mm and a length of 12000 mm, and the pile tops and the pile tops are in contact with each other, and Includes pile end carrier.
图14是图9所述实施例的施工方法的工序图,首先,如图14中a所示,通过深层搅拌的方式进行第一根直径800mm、深度12000mm水泥土桩1的施工;然后,如图14中b所示,紧沿水泥土桩1的外周,进行第二根相同规格尺寸的水泥土桩2的施工;然后,如图14中c所示,在水泥土桩1和2的中间位置的上方,紧沿水泥土桩1和2的外周,进行第三根相同规格尺寸的水泥土桩3的施工,从而形成最大直径1600mm的水泥土桩;然后,如图14中d所示,在水泥土桩达到初凝强度之前,以水泥土桩的圆心位置为中心点,同时或者先后沉入三根直径600mm、深度13000mm且外壁紧密贴合的护筒4,然后,如图14中e所示,在三根护筒4内均填入0.1m3加固料5,在三根护筒4内均放入三根重量为3.5T的细长型重锤6,利用重锤6在护筒4内的同时升降运动,对加固料5进行夯击;然后,如图14中f所示,重复进行上述填料并夯击的操作,使桩端下一定深度和范围内的土体被加固密实,直至全部总量为1.2m3的加固料全部被夯填进桩端土体;然后,如图14中g所示,分次在三根护筒4内均填入总量为0.9m3的干硬性混凝土7并继续用重锤6夯实,从而形成由干硬性混凝土、夯实的加固料和挤密土体组成的桩端载体;然后,如图14中h所示,在三根护筒4之内均沉入钢筋笼8;最后,如图14中i所示,在三根护筒4之内均灌注混凝土9后提出全部护筒4,形成由三根圆柱形桩组成最大直径1200mm、长度12000mm的桩簇,桩簇的桩周土体固化范围最大直径1600mm、深度12000mm,桩顶与桩顶之间相互接触,并且包括桩端载体。Figure 14 is a process diagram of the construction method of the embodiment of Figure 9. First, as shown in a of Figure 14, the first construction of the cement soil pile 1 having a diameter of 800 mm and a depth of 12,000 mm is carried out by means of deep mixing; As shown by b in Fig. 14, the construction of the second cement-soil pile 2 of the same size is carried out along the outer circumference of the cement-soil pile 1; then, as shown by c in Fig. 14, in the middle of the cement-soil piles 1 and 2 Above the position, along the outer circumference of the cement soil piles 1 and 2, a third cement soil pile 3 of the same size is constructed to form a cement soil pile having a maximum diameter of 1600 mm; then, as shown by d in Fig. 14, Before the cement-soil pile reaches the initial setting strength, the center position of the cement-soil pile is taken as the center point, and three casings of 600 mm in diameter and 13,000 mm in depth and closely adhering to the outer wall are successively sunk, and then, as shown in Fig. 14 It is shown that 0.1m 3 reinforcement material 5 is filled in the three casings 4, and three elongated weights 6 with a weight of 3.5T are placed in the three casings 4, and the weight 6 is used in the casing 4 At the same time, the lifting motion is performed, and the reinforcing material 5 is slammed; then, as shown by f in Fig. 14, repeating Said filler and tamping operation, so that the soil within a certain depth range and is reinforced dense, until a total of 1.2m 3 entire reinforcing material were all filled rammed into the soil pile tip end of the pile; Then, 14 As shown by g, the dry cover concrete 7 with a total amount of 0.9 m 3 is filled in each of the three casings 4 and continues to be tamped with the weight 6 to form a hard concrete, a tamping reinforcing material and a compacted soil. The pile end carrier of the body; then, as shown by h in Fig. 14, the steel cage 8 is sunk into the three casings 4; finally, as shown by i in Fig. 14, the three casings are filled. After the concrete 9, all the protective cylinders 4 are formed, and the piles with the maximum diameter of 1200 mm and the length of 12000 mm are formed by three cylindrical piles. The solidification range of the pile surrounding soil is 1600 mm and the depth is 12000 mm. The pile top and the pile top are mutually Contact and include a pile end carrier.
图11所述实施例是由四根方柱形桩组成最大直径1000mm、长度18000mm的桩簇,桩簇的桩周土体固化最大直径1400mm、长度18000mm,桩顶与桩顶之间相互接触。The embodiment shown in Fig. 11 is composed of four square column piles, which are composed of piles with a maximum diameter of 1000 mm and a length of 18000 mm. The soil around the piles has a maximum diameter of 1400 mm and a length of 18000 mm, and the pile tops and the pile tops are in contact with each other.
图15是图11所述实施例的施工方法的工序图,首先,如图15中a所示,通过高压旋喷的方式进行第一根直径700mm、长度18000mm水泥土桩1的施工;然后,如图15中b所示,紧沿水泥土桩1的外周,进行第二根相同规格尺寸的水泥土桩2的施工;然后,如图15中c所示,在水泥土桩1和2的上方,紧沿并对齐水泥土桩1和2的外周,进行第三根相同规格尺寸的水泥土桩3和第四根相同规格尺寸的水泥土桩4的施工,从而形成最大直径1400mm的水泥土桩;然后,如图15中d所示,将第一根预制混凝土方桩5的一个角点对准水泥土桩的中心点位置,通过动力沉入该第一根直径500mm、长度18000mm预制混凝土方桩5;然后,如图15中e所示,将第二根相同规格尺寸的方桩6的一个角点对准水泥土桩的中心点位置,并且紧沿并对齐第一根预制混凝土方桩5的一个侧边,通过动力沉入该方桩6;然后,如图15中f所示,紧沿并对齐方桩5的一个侧边,沉入第三根相同规格尺寸的方桩7;最后,如图15中g所示,紧沿并对齐方桩6和方桩7的侧边,沉入第四根相同规 格尺寸的方桩8,形成由四根方柱形桩组成最大直径1000mm、长度18000mm的桩簇,桩簇的桩周土体固化最大直径1400mm、长度18000mm,桩顶与桩顶之间相互接触。。Figure 15 is a process view of the construction method of the embodiment of Figure 11, first, as shown in a of Figure 15, the first construction of a cement soil pile 1 having a diameter of 700 mm and a length of 18000 mm is performed by high-pressure swirling; As shown in b in Fig. 15, the construction of the second cement-soil pile 2 of the same size is carried out along the outer circumference of the cement-soil pile 1; then, as shown in c in Fig. 15, in the cement-soil piles 1 and 2 Above, tightly aligning and aligning the outer circumferences of the cement soil piles 1 and 2, performing construction of a third cement soil pile 3 of the same size and a fourth cement soil pile 4 of the same size to form a cement soil having a maximum diameter of 1400 mm Pile; then, as shown by d in Fig. 15, a corner point of the first precast concrete square pile 5 is aligned with the center point position of the cement soil pile, and the first precast concrete having a diameter of 500 mm and a length of 18000 mm is submerged by power. Square pile 5; then, as shown by e in Fig. 15, a corner point of the second same size square pile 6 is aligned with the center point of the cement soil pile, and the first precast concrete is tightly aligned and aligned. One side of the pile 5 is sunk into the square pile 6 by power; then, As shown by f in Fig. 15, one side of the square pile 5 is tightly aligned and aligned, sinking into a third square pile 7 of the same size; finally, as shown by g in Fig. 15, tightly aligning and aligning the square pile 6 and The side of the square pile 7 sinks into the fourth same gauge The square-shaped pile 8 of the grid shape is composed of four square-column piles composed of piles with a maximum diameter of 1000 mm and a length of 18000 mm. The soil around the piles has a maximum diameter of 1400 mm and a length of 18000 mm. The pile top and the pile top are in contact with each other. . .
以上实施例只是描述性的,而非限定性的,不能以此限定本发明的保护范围,在上述说明的基础上所引申出的其它不同形式的变化或变动,仍处于本发明的保护范围之中。 The above embodiments are merely illustrative and not limiting, and the scope of the present invention is not limited thereto, and other variations or modifications of the various forms derived from the above description are still within the scope of the present invention. in.

Claims (12)

  1. 一种用于桩基的小直径桩簇,其特征在于,该小直径桩簇由两根以上小直径桩组成,桩顶和桩顶之间相互接触或咬合。A small diameter pile cluster for a pile foundation, characterized in that the small diameter pile cluster is composed of two or more small diameter piles, and the pile top and the pile top contact or bite each other.
  2. 如权利要求1所述的小直径桩簇,其特征在于,组成桩簇的桩的直径小于800mm。The small diameter pile cluster according to claim 1, wherein the piles constituting the pile cluster have a diameter of less than 800 mm.
  3. 如权利要求1所述的小直径桩簇,其特征在于,桩簇的桩周预先搅土,并向桩周土体中喷射水泥浆进行固化。The small-diameter pile cluster according to claim 1, wherein the pile circumference of the pile cluster is pre-mixed with soil, and the cement slurry is sprayed into the soil around the pile for solidification.
  4. 如权利要求1所述的小直径桩簇,其特征在于,组成桩簇的桩包括现制桩和预制桩。The small diameter pile cluster according to claim 1, wherein the piles constituting the pile pile comprise a ready pile and a precast pile.
  5. 如权利要求1~4之一所述的小直径桩簇,其特征在于,桩簇中的桩包括桩端载体,主要用于承载和传递竖向力。A small diameter pile cluster according to any one of claims 1 to 4, characterized in that the pile in the pile cluster comprises a pile end carrier, mainly for carrying and transmitting vertical forces.
  6. 一种进行如权利要求1所述的用于桩基的小直径桩簇的施工方法,其特征在于,(1)根据设计要求预定桩位;(2)在桩位上同时或者先后进行小直径桩施工。A method for constructing a small-diameter pile cluster for a pile foundation according to claim 1, characterized in that (1) a pile position is predetermined according to design requirements; (2) a small diameter is simultaneously or sequentially performed on the pile position Pile construction.
  7. 如权利要求6所述的施工方法,其特征在于,在施工小直径桩之前,先对桩周土体进行不出土搅拌,同时向土体中喷射水泥浆,形成水泥土桩。The construction method according to claim 6, characterized in that before the construction of the small-diameter pile, the soil around the pile is first unmixed, and the cement slurry is sprayed into the soil to form a cement pile.
  8. 如权利要求7所述的施工方法,其特征在于,水泥土桩通过一次或者分多次完成,最终成型的水泥土桩的直径大于或者等于桩簇的最大直径。The construction method according to claim 7, wherein the cement-soil pile is completed once or several times, and the diameter of the finally formed cement-soil pile is greater than or equal to the maximum diameter of the pile.
  9. 如权利要求7或8所述的施工方法,其特征在于,在水泥土桩强度达到初凝之前,进行小直径桩施工。The construction method according to claim 7 or 8, wherein the construction of the small-diameter pile is carried out before the strength of the cement-soil pile reaches the initial setting.
  10. 如权利要求6或7所述的施工方法,其特征在于,在进行小直径桩的桩身施工之前,通过重锤或者夯管的升降运动对桩端土体或者向桩端填入的加固料进行夯击,经过多次夯击后使桩端下一定深度和范围内的土体被加固密实,并以实测贯入度或者设定的填料量为控制标准检验桩端密实度,从而形成桩端载体。The construction method according to claim 6 or 7, wherein before the pile body construction of the small-diameter pile, the reinforcement material filled in the pile end soil or the pile end by the lifting movement of the weight or the fistula pipe is carried out. After slamming, the soil at a certain depth and range under the pile end is reinforced and compacted after repeated slamming, and the pile end density is checked by the measured penetration degree or the set amount of filler as a control standard, thereby forming a pile. End carrier.
  11. 如权利要求10所述的施工方法,其特征在于,上述的以实测贯入度或者设定的填料量为控制标准,实测贯入度是指在不填料的情况下重锤或者夯管空打3击~10击的下沉数值,设定的填料量在0.1~1.8m3范围内。The construction method according to claim 10, wherein the measured penetration degree or the set amount of the filler is a control standard, and the measured penetration degree means that the weight or the tube is empty without the filler. The sinking value of 3 hits to 10 hits, and the amount of filler set is in the range of 0.1 to 1.8 m 3 .
  12. 如权利要求10所述的施工方法,其特征在于,上述的向桩端填入的加固料,包括干硬性混凝土或碎砖或碎石或渣土或卵石或钢渣或水泥土或灰土中的一种或几种。 The construction method according to claim 10, wherein said reinforcing material filled into the pile end comprises one of dry hard concrete or broken brick or gravel or muck or pebble or steel slag or cement soil or lime soil. Kind or several.
PCT/CN2017/000141 2016-02-05 2017-01-25 Small-diameter pile cluster used for pile foundation, and method for construction thereof WO2017133373A1 (en)

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CN105649099A (en) * 2016-02-05 2016-06-08 王继忠 Small-diameter pile cluster used for pile foundation and construction method of small-diameter pile cluster
CN106065608B (en) * 2016-07-25 2018-12-28 王继忠 A kind of premixing high strength cement soil foundation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61216923A (en) * 1985-03-20 1986-09-26 Shimizu Constr Co Ltd Construction of in-situ concrete pile
CN1126264A (en) * 1994-12-26 1996-07-10 石寅生 Making method for non-annular borehole cast-in-place pile
CN2561823Y (en) * 2002-06-05 2003-07-23 邹宗煊 Three-dimensional high strength composite pile bases for building
CN104314078A (en) * 2014-11-05 2015-01-28 王继忠 Concrete pile construction equipment and construction method thereof
CN104790423A (en) * 2015-03-12 2015-07-22 中国能源建设集团浙江省电力设计院有限公司 Large-scale transmission tower composite top expansion cast-in-place pile foundation
CN105649099A (en) * 2016-02-05 2016-06-08 王继忠 Small-diameter pile cluster used for pile foundation and construction method of small-diameter pile cluster

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61216923A (en) * 1985-03-20 1986-09-26 Shimizu Constr Co Ltd Construction of in-situ concrete pile
CN1126264A (en) * 1994-12-26 1996-07-10 石寅生 Making method for non-annular borehole cast-in-place pile
CN2561823Y (en) * 2002-06-05 2003-07-23 邹宗煊 Three-dimensional high strength composite pile bases for building
CN104314078A (en) * 2014-11-05 2015-01-28 王继忠 Concrete pile construction equipment and construction method thereof
CN104790423A (en) * 2015-03-12 2015-07-22 中国能源建设集团浙江省电力设计院有限公司 Large-scale transmission tower composite top expansion cast-in-place pile foundation
CN105649099A (en) * 2016-02-05 2016-06-08 王继忠 Small-diameter pile cluster used for pile foundation and construction method of small-diameter pile cluster

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