WO2017133373A1 - Ensemble de pieux de petit diamètre utilisés pour une fondation sur pieux, et procédé de construction associé - Google Patents

Ensemble de pieux de petit diamètre utilisés pour une fondation sur pieux, et procédé de construction associé Download PDF

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Publication number
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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WO
WIPO (PCT)
Prior art keywords
pile
diameter
soil
small
piles
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Application number
PCT/CN2017/000141
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English (en)
Chinese (zh)
Inventor
王继忠
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王继忠
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Application filed by 王继忠 filed Critical 王继忠
Publication of WO2017133373A1 publication Critical patent/WO2017133373A1/fr

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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
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil

Definitions

  • 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.
  • end bearing pile and friction pile 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.
  • end bearing pile and friction pile With the development of building technology, the requirements for the bearing capacity of the pile foundation are getting larger and larger.
  • 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.
  • the compressive strength of the basic material of the pile is greatly wasted.
  • 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.
  • the pile diameter is expanded, the corresponding construction cost is more and more High, the technical difficulty of construction is getting bigger and bigger.
  • 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.
  • a small-diameter pile cluster for a pile foundation 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.
  • the piles constituting the piles have a diameter of less than 800 mm.
  • 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.
  • 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.
  • 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. .
  • 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.
  • the construction method includes deep mixing or high-pressure rotary spraying;
  • 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 .
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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
  • the area of the side resistance of the single pile is increased by more than 40%.
  • 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
  • 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.
  • the construction method adopts the method of not unearthing.
  • 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.
  • FIG. 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.
  • FIG. 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. 8 is a vertical sectional view
  • 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-dia
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 12 is a process diagram of the construction method of the embodiment of FIG. 1.
  • the first circular casing 1 having a diameter of 450 mm and a length of 9000 mm is vertically sunk to a set depth;
  • 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.
  • the reinforcing material 3 of 0.2 m 3 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Figure 14 is a process diagram of the construction method of the embodiment of Figure 9.
  • 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;
  • 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.
  • 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.
  • 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.
  • 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.
  • 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. . .

Abstract

L'invention concerne un ensemble de pieux de petit diamètre utilisé pour une fondation sur pieux ; l'ensemble de pieux de petit diamètre est constitué de deux pieux de petit diamètre, ou plus ; les parties supérieures de pieu sont en contact les unes avec les autres ou s'ajustent ensemble, de telle sorte que le diamètre des pieux constituant l'ensemble de pieux est inférieur à 800 mm. L'invention concerne également un procédé de construction d'un ensemble de pieux de petit diamètre utilisé pour une fondation sur pieux.
PCT/CN2017/000141 2016-02-05 2017-01-25 Ensemble de pieux de petit diamètre utilisés pour une fondation sur pieux, et procédé de construction associé WO2017133373A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610081588.7A CN105649099A (zh) 2016-02-05 2016-02-05 一种用于桩基的小直径桩簇及其施工方法
CN201610081588.7 2016-02-05

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WO2017133373A1 true WO2017133373A1 (fr) 2017-08-10

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN108396736A (zh) * 2018-05-14 2018-08-14 佳琳 一种制作复合劲芯桩的施工装置及施工方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105649099A (zh) * 2016-02-05 2016-06-08 王继忠 一种用于桩基的小直径桩簇及其施工方法
CN106065608B (zh) * 2016-07-25 2018-12-28 王继忠 一种预拌高强度水泥土地基基础

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CN2561823Y (zh) * 2002-06-05 2003-07-23 邹宗煊 建筑基础三维高强复合桩基
CN104314078A (zh) * 2014-11-05 2015-01-28 王继忠 混凝土桩的施工设备及其施工方法
CN104790423A (zh) * 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 一种大型输电杆塔复合扩顶灌注桩基础
CN105649099A (zh) * 2016-02-05 2016-06-08 王继忠 一种用于桩基的小直径桩簇及其施工方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61216923A (ja) * 1985-03-20 1986-09-26 Shimizu Constr Co Ltd 場所打ちコンクリ−ト杭の施工方法
CN1126264A (zh) * 1994-12-26 1996-07-10 石寅生 非圆形钻孔灌注桩成桩法
CN2561823Y (zh) * 2002-06-05 2003-07-23 邹宗煊 建筑基础三维高强复合桩基
CN104314078A (zh) * 2014-11-05 2015-01-28 王继忠 混凝土桩的施工设备及其施工方法
CN104790423A (zh) * 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 一种大型输电杆塔复合扩顶灌注桩基础
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108396736A (zh) * 2018-05-14 2018-08-14 佳琳 一种制作复合劲芯桩的施工装置及施工方法
CN108396736B (zh) * 2018-05-14 2023-06-16 佳琳 一种制作基于micp的复合劲芯桩的施工装置及其施工方法

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