WO2023197398A1 - 一种支盘桩施工用多功能装置及其施工方法 - Google Patents

一种支盘桩施工用多功能装置及其施工方法 Download PDF

Info

Publication number
WO2023197398A1
WO2023197398A1 PCT/CN2022/093197 CN2022093197W WO2023197398A1 WO 2023197398 A1 WO2023197398 A1 WO 2023197398A1 CN 2022093197 W CN2022093197 W CN 2022093197W WO 2023197398 A1 WO2023197398 A1 WO 2023197398A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating shaft
cutting
power
cutterhead
limiting
Prior art date
Application number
PCT/CN2022/093197
Other languages
English (en)
French (fr)
Inventor
韩辉
冯金
沈道旭
吴万林
彭孝林
孙浩栋
Original Assignee
中铁四局集团第五工程有限公司
中铁四局集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中铁四局集团第五工程有限公司, 中铁四局集团有限公司 filed Critical 中铁四局集团第五工程有限公司
Publication of WO2023197398A1 publication Critical patent/WO2023197398A1/zh

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements

Definitions

  • the invention relates to the field of geotechnical engineering, and in particular to a multifunctional device for support and plate pile construction and a construction method thereof.
  • the support and plate pile is a new type of pile foundation technology. It uses a support and plate machine to extrudate the appropriate soil layer at the target elevation in the foundation soil to enlarge the pile diameter of a certain pile foundation section, forming multiple usable pile foundations on its side walls. Bored cast-in-place piles used to support the plate to increase the bearing capacity of a single pile. Due to the multiple outward protruding support plates provided on the side walls of the pile foundation, the bearing capacity of a single pile is greatly improved, the pile diameter and pile length can be reduced, effectively saving costs and shortening the construction period. It has now become an advanced technology in foundation treatment for building construction. Craftsmanship is widely used in many cities.
  • variable-section pile the currently commonly used construction method is to use a drilling machine to form the hole, and then use a special extrusion and expansion device for extrusion and expansion. Due to the sequence of the processes, the construction efficiency is low, and in the same building Site, drilling disturbance of adjacent pile foundations or soil squeezing effect will have a serious impact on the quality of pile formation of support plate piles. Secondly, since the outward expansion of the extruder cannot be formed at one time, it is often necessary to perform multiple extrusions to achieve the target supporting effect. Moreover, due to the influence of the strength of the soil, the construction is difficult, which greatly limits the support and plate piles. The range of applications in different foundations. However, the rotational cutting method can be performed simultaneously with drilling, and the diameter expansion effect can be achieved through one rotational cutting on the specified pile foundation section. Although there are currently equipment that integrate drilling and soil cleaning, the effect of diameter expansion cannot be achieved at the same time.
  • the purpose of the present invention is to provide a multifunctional device for supporting and disc pile construction and a construction method thereof.
  • the multifunctional device has the functions of drilling, turning, soil cleaning, etc. at the same time.
  • a multi-functional device for support and plate pile construction including a central rotating shaft and a power rotating shaft arranged coaxially.
  • the central rotating shaft is located inside the power rotating shaft.
  • a rotary shaft capable of adjusting their relative positions is provided between the central rotating shaft and the power rotating shaft.
  • Snap-on mechanism; a power transmission tube and a cutting cutterhead are fixed at the lower part of the power rotating shaft.
  • the bottom of the power transmission tube is fixedly connected to the top of the cutting cutterhead, and the bottom surface area of the power transmission tube is smaller than the top surface of the cutting cutterhead. area; a drilling cutterhead is installed at the bottom of the cutting cutterhead.
  • the cutting cutterhead includes a cylindrical portion and an inverse conical portion, and the cylindrical portion and the inverse conical portion are integrally formed; the drilling cutter The disc is mounted on the bottom of the inverted cone.
  • the central rotating shaft passes through a power transmission tube and a cutting cutterhead; the middle part of the bottom surface of the power transmission tube is recessed inward to form a receiving groove, and the lower part of the power transmission tube is provided with several through grooves in a radial direction.
  • the through groove is connected with the accommodation groove; a rotating cutting structure is provided between the cutting cutterhead and the power transmission tube; the rotating cutting structure includes a limiting turntable located inside the accommodation groove and a circumferential side of the top surface of the cutting cutterhead.
  • the number of the cutting blades is five, and the five cutting blades are evenly spaced;
  • the limiting turntable is coaxially arranged with the central rotating shaft and is fixedly connected to the central rotating shaft; the limiting dial
  • Several support rods are rotatably connected to the outer circumferential side of the turntable, and the support rods pass through the through grooves. The other end of the support rods is rotatably connected to the middle part of the cutting blade; several support rods are installed on the top surface of the cutting cutterhead.
  • the limit shaft is located on the same circumference, and the limit shaft corresponds to the cutting blade in a one-to-one manner; the two ends of the cutting blade are respectively a rotating part and a cutting part, and the rotating part is rotationally connected to the limiting shaft; the limiting shaft Its function is to limit the rotating part of the cutting blade.
  • the rotary clamping mechanism includes several limit blocks fixed on the upper peripheral side of the central rotating shaft and limit grooves corresponding to the limit blocks opened on the inner wall of the top of the power rotating shaft; the limit blocks
  • the bit block includes a horizontal part and a clamping part fixed at the bottom of the horizontal part;
  • the limit groove includes an arc-shaped groove opened on the inner wall of the top of the power rotating shaft and a pair of limit holes located on both sides of the bottom of the arc-shaped groove, so
  • the limit holes are respectively a first position hole and a second position hole, and the size of the limit hole matches the size of the clamping portion; by locating the clamping portion in the central rotating shaft in different limiting holes, that is, The central rotating shaft and the power rotating shaft can be placed in different relative positions, thereby changing the degree of outward expansion of the cutting portion of the cutting insert.
  • the central angle formed by the arc edge where the first position hole and the second position hole are located relative to the center of the limiting turntable is equal to the central axis of rotation when the cutting part of the cutting insert is transformed from an inwardly contracted state to an outwardly expanded state.
  • the required angle of rotation can accurately and efficiently adjust the position of the cutting blade, allowing the cutting blade to quickly switch between the expanded and closed states.
  • a cavity is formed in the middle of the bottom surface of the inverse tapered portion by being recessed inward.
  • the cavity can be used to temporarily store slag generated during drilling;
  • the central rotating shaft is a hollow rotating shaft, and the interior of the central rotating shaft has a through-going slag discharge channel along its axial direction, and the slag discharge channel is connected with the cavity.
  • the circulating water pump system is connected to the cavity through the slag discharge channel, which can suck out the slag and achieve the effect of synchronous slag cleaning during the drilling process.
  • Another object of the present invention is to provide a construction method for supporting and disc piles, using the above-mentioned multi-functional device for construction.
  • the specific steps are: (1) first connect the power rotating shaft with the external hydraulic power device;
  • the cutting blade can perform rotational cutting and diameter expansion while rotating drilling.
  • the present invention adds a cutting blade to the rotary drill body. When the rotary drill reaches a designated position, the cutting blade is opened for rotational cutting. By rotating the cutting soil, a high-efficiency pile foundation diameter expansion process can be achieved, and the cutting blade It can be designed and replaced according to different geological conditions, which greatly expands the application range of support piles.
  • the conventional support and plate pile technology usually uses drilling machinery and equipment to form holes, and then places the extrusion and expansion device to perform extrusion and expansion.
  • the disturbance caused by the secondary construction or the soil squeezing effect caused by the squeeze expansion process has a greater impact on the adjacent pile foundations, seriously affecting the quality of the newly formed cement pile body.
  • the present invention can realize the rotational cutting diameter expansion process at the same time when drilling, avoiding the impact of secondary construction and reducing the soil squeezing effect, and protecting the newly formed cement pile body. Avoid severe soil squeezing effect, resulting in unsatisfactory pile quality and insufficient bearing capacity.
  • the limitations of the extrusion and expansion method on hard stratum conditions can be improved, greatly broadening the application range of support piles.
  • the multifunctional device for support plate pile construction drives the cutting cutterhead and the drilling cutterhead to perform rotary drilling through the rotation of the power rotating shaft.
  • the central rotating shaft is adjusted through the rotating cutting structure.
  • the relative position of the cutting blade and the power rotating shaft causes the cutting part of the cutting blade to expand outward under the action of the support rod pushing the cutting blade, so that the cutting blade presents an expanded state.
  • the cutting insert can perform rotational cutting and diameter expansion while rotating drilling.
  • the central rotating shaft as a hollow shaft, the present invention can timely suck out the slag produced by drilling through the circulating water pump system, thereby realizing the functions of drilling, expanding and cleaning while drilling.
  • Figure 1 is a schematic structural diagram of a multifunctional device for supporting and disc pile construction provided by the present invention
  • Figure 2 is a schematic structural diagram of the rotary cutting structure
  • Figure 3 is an enlarged view of part A in Figure 1;
  • Figure 4 is a top view of the rotating cutting structure when the cutting blade is in the unfolded state
  • Figure 5 is a top view of the rotating cutting structure when the cutting blade is in a closed state
  • Figure 6 is a top view of the power rotating shaft
  • Figure 7 is a top view of the central rotating shaft and the power rotating shaft when they cooperate under the action of the rotating clamping mechanism
  • a multi-functional device for support plate pile construction includes a coaxially arranged central rotating shaft 1 and a power rotating shaft 2.
  • the central rotating shaft 1 is located inside the power rotating shaft 2.
  • the power transmission tube 4 and the cutting cutterhead 5 are fixed at the lower part of the power rotating shaft.
  • the bottom of the power transmission tube 4 is fixedly connected to the top of the cutting cutterhead 5, and the bottom surface area of the power transmission tube 4 is smaller than the top surface area of the cutting cutterhead 5;
  • a drilling cutterhead 7 is installed on the bottom of the cutting cutterhead 5.
  • the cutting cutterhead 5 includes a cylindrical portion 51 and an inverse tapered portion 52.
  • the cylindrical portion 51 and the inverse tapered portion 52 are integrally formed; the drilling cutterhead 7 is installed at the bottom of the inverse tapered portion 52 .
  • the central rotating shaft 1 passes through the power transmission tube 4 and the cutting cutterhead 5; the middle part of the bottom surface of the power transmission tube 4 is recessed inward to form a receiving groove 8, and the lower part of the power transmission tube has several through grooves 9 diverging along its radial direction.
  • the through groove 9 is connected with the receiving groove 8; a rotating cutting structure 6 is provided between the cutting cutterhead 5 and the power transmission cylinder 4; with reference to Figures 2 to 5, the rotating cutting structure 6 includes a limiting turntable 61 located inside the receiving groove 8 and several cutting blades 62 distributed on the circumferential side of the top surface of the cutting cutterhead 5.
  • the number of cutting blades 62 is five, and the five cutting blades are evenly spaced along the circumferential direction; the limit turntable 61 and the central rotating shaft 1 It is coaxially arranged and fixedly connected with the central rotating shaft; the outer peripheral side of the limit turntable 61 is rotatably connected with several support rods 63, the support rods 63 pass through the through groove 9, and the other end of the support rod 63 is rotationally connected with the middle part of the cutting blade.
  • a number of limiting shafts 64 located on the same circumference are installed on the top surface of the cutting cutterhead 5.
  • the limiting shafts 64 correspond to the cutting blades 62 one-to-one; the two ends of the cutting blade 62 are respectively the rotating part 621 and the cutting part 622.
  • the rotating part 621 is rotationally connected with the limiting shaft 64; the limiting shaft 64 functions to limit the rotating part of the cutting blade 62.
  • the central rotating shaft 1 and the power rotating shaft 2 are relatively rotated through the rotating clamping mechanism, Under the joint limiting action of the support rod 63 and the limiting shaft 64, the cutting portion 622 of the cutting blade expands outward or contracts inward, so that the cutting blade assumes an expanded state or a closed state (refer to Figures 4 and 5).
  • the rotary clamping mechanism 3 includes a number of limiting blocks 31 fixed on the upper circumference of the central rotating shaft 1 and a limiting groove 32 corresponding to the limiting blocks on the inner wall of the top of the power rotating shaft 2.
  • the limiting block 31 includes a horizontal part 311 and a clamping part 312 fixed at the bottom of the horizontal part;
  • the limiting groove 32 includes an arc-shaped groove 321 on the inner wall of the top of the power rotating shaft and a pair of grooves located on both sides of the bottom of the arc-shaped groove
  • the limit holes are the first position hole 321 and the second position hole 322 respectively.
  • the size of the limit hole matches the size of the clamping part; by locating the clamping part in the central rotating shaft at different limit holes , the central rotating shaft and the power rotating shaft can be placed in different relative positions, thereby changing the degree of outward expansion of the cutting part of the cutting insert.
  • the central angle formed by the arc edge where the first position hole 322 and the second position hole 323 are located relative to the center of the limiting turntable is equal to the center axis of rotation when the cutting part of the cutting insert is transformed from an inwardly contracted state to an outwardly expanded state. The required angle of rotation.
  • the design of this position can accurately and efficiently adjust the position of the cutting blade, allowing the cutting blade to quickly switch between the expanded and closed states.
  • the middle part of the bottom surface of the inverted tapered portion 52 is recessed inward to form a cavity 53.
  • the cavity 53 can be used to temporarily store the slag generated during the drilling process; at the same time, the central rotating shaft 1 is designed It is a hollow rotating shaft. The inside of the central rotating shaft has a through-going slag discharge channel along its axis. The slag discharge channel is connected with the cavity.
  • the circulating water pump system is connected to the cavity through the slag discharge channel, so that the slag can be sucked out. , to achieve the effect of simultaneous slag cleaning during the drilling process.
  • the construction method using the multifunctional device for supporting and disc pile construction provided by the present invention is:
  • the power rotating shaft is driven by an external hydraulic power device to realize its rotation.
  • the hydraulic power device is started to drive the power rotating shaft to move, and then the power transmission tube and the bottom cutterhead are used for rotary drilling.
  • the relative positions of the central shaft and the power shaft are adjusted by rotating the cutting structure. Under the action of the support rod pushing the cutting blade, the cutting part of the cutting blade expands outward, thus Leave the cutting insert in its unfolded state. Then, driven by the power rotating shaft, the cutting insert can perform rotational cutting and diameter expansion while rotating drilling.
  • the specific operation of adjusting the relative position of the central rotating shaft and the power rotating shaft through the rotating cutting structure is: when the relative position of the central rotating shaft and the power rotating shaft needs to be changed, a vertical upward force is applied to the central rotating shaft to move the central rotating shaft upward. At a certain distance, the moving displacement is slightly larger than the depth of the limit hole, so that the clamping part can be pulled out from the first position hole, and then the central rotating shaft is rotated clockwise to allow the clamping part to enter the second position hole. During this process, due to the relative position of the central rotating shaft and the power rotating shaft, the cutting blade can be made to unfold under the thrust of the support rod.

Abstract

一种支盘桩施工用多功能装置及其施工方法，包括同轴设置的中心转轴(1)和动力转轴(2)，中心转轴(1)和动力转轴(2)之间设置有能够调节其相对位置的旋转卡接机构(3)；动力转轴(2)的下部固定有传力筒(4)和切削刀盘(5)；切削刀盘(5)和传力筒(4)之间设有旋转切削结构(6)。通过动力转轴(2)转动带动切削刀盘(5)和钻孔刀盘(7)进行旋转钻孔，当钻孔至指定位置需要进行扩径时，通过旋转切削结构(6)调整中心转轴(1)和动力转轴(2)的相对位置，在支撑杆(63)顶推切削刀片(62)的作用下，使切削刀片(62)的切削部(622)呈现向外扩展形态；然后在动力转轴(2)的带动下，切削刀片(62)可在旋转钻孔的同时进行旋转切削扩径。通过将中心转轴(1)设计为空心轴，能够将钻孔产生的渣土及时吸出，实现随钻、随扩、随清的功能。

Description

一种支盘桩施工用多功能装置及其施工方法 技术领域
本发明涉及一种涉及岩土工程领域，具体涉及支盘桩施工用多功能装置及其施工方法。
 背景技术
支盘桩是一种新型桩基技术，通过采用支盘机在地基土中目标高程处合适的土层进行挤扩增大某一桩基截面的桩径，在其侧壁上形成多个可用于提高单桩承载力的支盘的钻孔灌注桩。由于桩基侧壁上设置的向外突出的多个支盘，大大提高单桩的承载力，可以减小桩径和桩长，有效节约成本，缩短工期，目前已经成为建筑施工地基处理中先进工艺，在许多城市得到广泛应用。然而，作为一种新型变截面桩，目前常用的施工方法是采用钻孔机器成孔后，再采用专用挤扩装置进行挤扩，由于工艺的先后顺序，导致施工效率较低，且在同一建筑场地，相邻桩基的钻孔扰动或者挤土效应，均会对支盘桩的成桩质量产生严重影响。其次，由于挤扩器向外挤扩无法一次成型，常需要进行多次挤扩，才能达到目标支盘效果，且由于受土体强度的影响，施工难度较大，极大限制了支盘桩的在不同地基的应用范围。然而，旋削的方式可以与钻孔同步进行，在指定桩基截面上通过一次旋转切削，实现扩径效果。虽然目前已有集钻孔、清土于一体的设备，但是无法同时实现扩径的效果。
发明内容
针对现有技术的不足，本发明的目的是提供一种支盘桩施工用多功能装置及其施工方法，该多功能装置同时具有钻孔、旋削、清土等功能。
为实现上述目的，本发明采用的技术方案为：
一种支盘桩施工用多功能装置，包括同轴设置的中心转轴和动力转轴，所述中心转轴位于动力转轴的内部，所述中心转轴和动力转轴之间设置有能够调节其相对位置的旋转卡接机构；所述动力转轴的下部固定有传力筒和切削刀盘，所述传力筒的底部与切削刀盘的顶部固定连接，且传力筒的底面面积小于切削刀盘的顶面面积；所述切削刀盘的底部安装有钻孔刀盘，进一步的，所述切削刀盘包括柱状部和倒锥形部，所述柱状部和倒锥形部一体成形；所述钻孔刀盘安装在倒锥形部的底部。所述中心转轴穿设传力筒和切削刀盘；所述传力筒的底面中部向内凹陷形成容纳槽，所述传力筒的下部沿其径向呈发散式开设有若干个通槽，所述通槽与容纳槽连通；所述切削刀盘和传力筒之间设有旋转切削结构；所述旋转切削结构包括位于容纳槽内部的限位转盘和分布于切削刀盘顶面周侧的若干个切削刀片，优选的，所述切削刀片的数量为五个，五个切削刀片等间距均匀分布；所述限位转盘与中心转轴同轴设置且与中心转轴固定连接；所述限位转盘的外周侧转动连接有若干个支撑杆，所述支撑杆穿设所述通槽，所述支撑杆的另一端与切削刀片的中部转动连接；所述切削刀盘的顶面安装有若干个位于同一圆周上的限位轴，所述限位轴与切削刀片一一对应；所述切削刀片的两端分别为转动部和切削部，所述转动部与限位轴转动连接；限位轴的作用是对切削刀片的转动部进行限位，当通过旋转卡接机构使中心转轴和动力转轴发生相对转动时，在支撑杆的作用下，切削刀片的切削部向外扩展或向内收缩，从而使切削刀片呈现展开状态或闭合状态。
作为优选的技术方案，所述旋转卡接机构包括固定在中心转轴上部周侧的若干个限位块以及开设在动力转轴顶部内侧壁上的与限位块相对应的限位槽；所述限位块包括水平部以及固定在水平部底部的卡接部；所述限位槽包括开设在动力转轴顶部内侧壁上的弧形槽以及位于弧形槽底部两侧的一对限位孔，所述限位孔分别为第一位置孔和第二位置孔，所述限位孔的尺寸与卡接部的尺寸相适配；通过使中心转轴中卡接部位于不同的限位孔中，即可使中心转轴和动力转轴处于不同的相对位置，从而改变切削刀片的切削部向外扩展程度。进一步优选的，所述第一位置孔和第二位置孔所在的弧边相对于限位转盘中心所形成的圆心角等于使切削刀片的切削部从向内收缩状态转化为向外扩展时中心转轴所需转动的角度。该位置的设计能够准确高效的调节切削刀片的位置状态，使切削刀片在展开状态和闭合状态之间快速切换。
作为优选的技术方案，所述倒锥形部的底面中部向内凹陷形成有空腔。空腔可用于暂存钻孔过程中产生的渣土；所述中心转轴为空心转轴，所述中心转轴的内部沿其轴线方向具有贯通的出渣通道，所述出渣通道与空腔连通。钻孔过程中，通过出渣通道将循环水泵系统与空腔连接，可以将渣土吸出，实现钻孔过程中同步清渣的效果。
本发明的另一个发明目的是提供一种支盘桩的施工方法，采用上述多功能装置进行施工，具体步骤为：（1）先将动力转轴与外部液压动力装置连接；
（2）钻孔时，启动液压动力装置带动动力转轴运动，进而通过传力筒带动其底部的切削刀盘进行旋转钻孔；
（3）当钻孔至指定位置需要进行扩径时，通过旋转切削结构调整中心转轴和动力转轴的相对位置：先给中心转轴施加一个竖直向上的作用力，使中心转轴向上移动，移动位移大于限位孔的深度即可，以使卡接部能够从第一位置孔中拔出；然后顺时针旋转中心转轴，使卡接部进入第二位置孔中，该过程中，在支撑杆的推力作用下，即可使切削刀片呈现展开状态；
（3）在动力转轴的带动下，切削刀片可在旋转钻孔的同时进行旋转切削扩径。
现有支盘桩主要是采用挤扩器向外扩展的姿态来形成支盘，挤扩过程中会形成小台肩，容易导致孔洞坍塌。其次，成一个盘需要挤扩至少8次，施工效率极慢，挤扩难度大，挤扩效率低。此外，挤扩器在挤扩过程中遇到硬夹层或者较硬的岩层时，挤扩困难，施工时间相对较长，容易发生塌孔，施工质量不易控制，施工效率低，极大限制了支盘桩的应用范围。甚至由于结构的特殊性和土质的不均匀性，造成现有支盘桩挤扩装置挤压成型的支盘形状不规则，主要原因是挤扩装置只能进行挤扩，不能对支盘进行旋转修形，造成单个支盘各个方向的承载力不均匀。本发明通过在旋挖钻钻身增设切削刀片，当旋挖钻至指定位置的时候，打开切削刀片进行旋转切削，通过旋转切削土体，可以实现高效率的桩基扩径工艺，而且切削刀片可根据不同地质条件进行设计、更换，极大扩宽了支盘桩的应用范围。
常规的支盘桩工艺通常是先采用钻孔机器设备成孔之后，再沉放挤扩装置，进行挤扩。由于挤扩过程中导致的二次施工形成的扰动或者挤土效应对相邻桩基影响较大，严重影响新形成水泥桩身的质量。本发明通过在钻孔桩机增设切削刀盘，在钻孔时即可同时实现旋转切削扩径工艺，避免二次施工减低挤土效应的影响，保护新形成水泥桩身。避免严重的挤土效应导致成桩质量不理想，出现承载力不足的问题。而且，通过旋转切削的方式，可以改善挤扩方式对于坚硬地层条件的限制，极大拓宽了支盘桩的应用范围。
目前，现有旋挖机实际工程应用效果不佳，无法实现钻孔、旋削扩径、清土的一体化功能，自动化效率较低。通过钻机增设切削刀盘与空心转轴，可以实现随钻、随扩、随清的功能，极大提高了施工效率，实现自动化的工艺生产，有利于降本增效，具有显著的经济和环境效益。
本发明的有益效果为：
本发明提供的支盘桩施工用多功能装置，通过动力转轴转动带动切削刀盘和钻孔刀盘进行旋转钻孔，当钻孔至指定位置需要进行扩径时，通过旋转切削结构调整中心转轴和动力转轴的相对位置，在支撑杆顶推切削刀片的作用下，使切削刀片的切削部呈现向外扩展形态，从而使切削刀片呈现展开状态。然后在动力转轴的带动下，切削刀片可在旋转钻孔的同时进行旋转切削扩径。此外，本发明通过将中心转轴设计为空心轴，通过循环水泵系统能够将钻孔产生的渣土及时吸出，实现随钻、随扩、随清的功能。
 附图说明
图1为本发明提供的支盘桩施工用多功能装置的结构示意图；
图2为旋转切削结构的结构示意图；
图3为图1中A部放大图；
图4为切削刀片为展开状态时的旋转切削结构俯视图；
图5为切削刀片为闭合状态时的旋转切削结构俯视图；
图6为动力转轴的俯视图；
图7为在旋转卡接机构作用下中心转轴和动力转轴配合时的俯视图；
附图标记：1-中心转轴，2-动力转轴，3-旋转卡接机构，31-限位块， 311-水平部，312-卡接部，32-限位槽，321-弧形槽，322-第一位置孔，323-第二位置孔，4-传力筒，5-切削刀盘，51-柱状部，52-倒锥形部，53-空腔，6-旋转切削结构，61-限位转盘，62-切削刀片，621-转动部，622-切削部，63-支撑杆，64-限位轴，7-钻孔刀盘，8-容纳槽，9-通槽。
具体实施方式
下面结合实施例和附图对本发明作更进一步的说明，以使本领域的技术人员可以更好地理解本发明并能予以实施，但所举实施例不作为对本发明的限定。
需要说明的是，本发明中“固定”、“连接”、“安装”、“固定连接”等均表示相互连接的两部件之间是固定在一起，一般是通过焊接、螺钉等方式固定在一起。“转动连接”等是指两部件连接在一起并能相对运动。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
需要理解的是，术语“上”、“下”、“顶”、 “底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为本发明的限制。本发明中所述“第一”、“第二”不代表具体的数量及顺序，仅仅是用于名称的区分。
参考图1，一种支盘桩施工用多功能装置，包括同轴设置的中心转轴1和动力转轴2，中心转轴1位于动力转轴2的内部，中心转轴1和动力转轴2之间设置有能够调节其相对位置的旋转卡接机构3。动力转轴的下部固定有传力筒4和切削刀盘5，传力筒4的底部与切削刀盘5的顶部固定连接，且传力筒4的底面面积小于切削刀盘5的顶面面积；切削刀盘5的底部安装有钻孔刀盘7，进一步的，切削刀盘5包括柱状部51和倒锥形部52，柱状部51和倒锥形部52一体成形；钻孔刀盘7安装在倒锥形部52的底部。中心转轴1穿设传力筒4和切削刀盘5；传力筒4的底面中部向内凹陷形成有容纳槽8，传力筒的下部沿其径向呈发散式开设有若干个通槽9，通槽9与容纳槽8连通；切削刀盘5和传力筒4之间设有旋转切削结构6；参考图2至图5，旋转切削结构6包括位于容纳槽8内部的限位转盘61和分布于切削刀盘5顶面周侧的若干个切削刀片62，优选的，切削刀片62的数量为五个，五个切削刀片沿圆周方向等间距均匀分布；限位转盘61与中心转轴1同轴设置且与中心转轴固定连接；限位转盘61的外周侧转动连接有若干个支撑杆63，支撑杆63穿设所述通槽9，支撑杆63的另一端与切削刀片的中部转动连接；切削刀盘5的顶面安装有若干个位于同一圆周上的限位轴64，限位轴64与切削刀片62一一对应；切削刀片62的两端分别为转动部621和切削部622，转动部621与限位轴64转动连接；限位轴64的作用是对切削刀片62的转动部进行限位，当通过旋转卡接机3构使中心转轴1和动力转轴2发生相对转动时，在支撑杆63和限位轴64的共同限位作用下，使得切削刀片的切削部622向外扩展或向内收缩，从而使切削刀片呈现展开状态或闭合状态（参考图4和图5）。
参考图6和图7，旋转卡接机构3包括固定在中心转轴1上部周侧的若干个限位块31以及开设在动力转轴2顶部内侧壁上的与限位块相对应的限位槽32；限位块31包括水平部311以及固定在水平部底部的卡接部312；限位槽32包括开设在动力转轴顶部内侧壁上的弧形槽321以及位于弧形槽底部两侧的一对限位孔，限位孔分别为第一位置孔321和第二位置孔322，限位孔的尺寸与卡接部的尺寸相适配；通过使中心转轴中卡接部位于不同的限位孔中，即可使中心转轴和动力转轴处于不同的相对位置，从而改变切削刀片的切削部向外扩展程度。进一步优选的，第一位置孔322和第二位置孔323所在的弧边相对于限位转盘中心所形成的圆心角等于使切削刀片的切削部从向内收缩状态转化为向外扩展时中心转轴所需转动的角度。该位置的设计能够准确高效的调节切削刀片的位置状态，使切削刀片在展开状态和闭合状态之间快速切换。
再参考图1，作为优选的实施方式，倒锥形部52的底面中部向内凹陷形成有空腔53，空腔53可用于暂存钻孔过程中产生的渣土；同时将中心转轴1设计为空心转轴，中心转轴的内部沿其轴线方向具有贯通的出渣通道，出渣通道与空腔连通，钻孔过程中，通过出渣通道将循环水泵系统与空腔连接，可以将渣土吸出，实现钻孔过程中同步清渣的效果。
利用本发明提供的支盘桩施工用多功能装置的施工方法为：
动力转轴由外部液压动力装置驱动实现其转动，当需要钻孔时，启动液压动力装置带动动力转轴运动，进而通过传力筒与底部刀盘进行旋转钻孔。当钻孔至指定位置需要进行扩径时，通过旋转切削结构调整中心转轴和动力转轴的相对位置，在支撑杆顶推切削刀片的作用下，使切削刀片的切削部呈现向外扩展形态，从而使切削刀片呈现展开状态。然后在动力转轴的带动下，切削刀片可在旋转钻孔的同时进行旋转切削扩径。其中，通过旋转切削结构调整中心转轴和动力转轴的相对位置的具体操作为：当需要改变中心转轴和动力转轴的相对位置时，对中心转轴施加一个竖直向上的作用力，使中心转轴向上移动一定距离，移动位移略大于限位孔的深度即可，以使卡接部能够从第一位置孔中拔出，然后顺时针旋转中心转轴，使卡接部进入第二位置孔中。该过程中，由于中心转轴和动力转轴的相对位置发生该处，在支撑杆的推力作用下，即可使切削刀片呈现展开状态。
显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。

Claims (8)

  1. 一种支盘桩施工用多功能装置，其特征在于：包括同轴设置的中心转轴和动力转轴，所述中心转轴位于动力转轴的内部，所述中心转轴和动力转轴之间设置有能够调节其相对位置的旋转卡接机构；所述动力转轴的下部固定有传力筒和切削刀盘，所述传力筒的底部与切削刀盘的顶部固定连接，且传力筒的底面面积小于切削刀盘的顶面面积；所述切削刀盘的底部安装有钻孔刀盘；所述中心转轴穿设在传力筒和切削刀盘中间；所述传力筒的底面中部向内凹陷形成容纳槽，所述传力筒的下部沿其径向呈发散式开设有若干个通槽，所述通槽与容纳槽连通；所述切削刀盘和传力筒之间设有旋转切削结构；所述旋转切削结构包括位于容纳槽内部的限位转盘和分布于切削刀盘顶面周侧的若干个切削刀片；所述限位转盘与中心转轴同轴设置且与中心转轴固定连接；所述限位转盘的外周侧转动连接有若干个支撑杆，所述支撑杆穿设所述通槽，所述支撑杆的另一端与切削刀片的中部转动连接；所述切削刀盘的顶面安装有若干个位于同一圆周上的限位轴，所述限位轴与切削刀片一一对应；所述切削刀片的两端分别为转动部和切削部，所述转动部与限位轴转动连接。
  2. 根据权利要求1所述的支盘桩施工用多功能装置，其特征在于：所述旋转卡接机构包括固定在中心转轴上部周侧的若干个限位块以及开设在动力转轴顶部内侧壁上的与限位块相对应的限位槽；所述限位块包括水平部以及固定在水平部底部的卡接部；所述限位槽包括开设在动力转轴顶部内侧壁上的弧形槽以及位于弧形槽底部两侧的一对限位孔，所述限位孔分别为第一位置孔和第二位置孔，所述限位孔的尺寸与卡接部的尺寸相适配。
  3. 根据权利要求2所述的支盘桩施工用多功能装置，其特征在于：所述第一位置孔和第二位置孔所在的弧边相对于限位转盘中心所形成的圆心角等于使切削刀片的切削部从向内收缩状态转化为向外扩展时中心转轴所需转动的角度。
  4. 根据权利要求1至3任一项所述的支盘桩施工用多功能装置，其特征在于：所述切削刀盘包括柱状部和倒锥形部，所述柱状部和倒锥形部一体成形；所述钻孔刀盘安装在倒锥形部的底部。
  5. 根据权利要求4所述的支盘桩施工用多功能装置，其特征在于：所述切削刀片的数量为五个，五个切削刀片等间距均匀分布。
  6. 根据权利要求4所述的支盘桩施工用多功能装置，其特征在于：所述倒锥形部的底面中部向内凹陷形成有空腔；所述中心转轴为空心转轴，所述中心转轴的内部沿其轴线方向具有贯通的出渣通道，所述出渣通道与空腔连通。
  7. 一种支盘桩的施工方法，其特征在于，采用如上述权利要求1至6任一项所述的多功能装置进行施工，步骤为：先将动力转轴与外部液压动力装置连接，钻孔时，启动液压动力装置带动动力转轴运动，进而通过传力筒带动其底部的切削刀盘进行旋转钻孔；当钻孔至指定位置需要进行扩径时，通过旋转切削结构调整中心转轴和动力转轴的相对位置，在支撑杆顶推切削刀片的作用下，使切削刀片的切削部呈现向外扩展形态；然后在动力转轴的带动下，切削刀片可在旋转钻孔的同时进行旋转切削扩径。
  8. 根据权利要求7所述的施工方法，其特征在于：通过旋转切削结构调整中心转轴和动力转轴的相对位置的具体操作为：先给中心转轴施加一个竖直向上的作用力，使中心转轴向上移动，移动位移大于限位孔的深度即可，以使卡接部能够从第一位置孔中拔出；然后顺时针旋转中心转轴，使卡接部进入第二位置孔中，该过程中，在支撑杆的推力作用下，即可使切削刀片呈现展开状态。
PCT/CN2022/093197 2022-04-11 2022-05-17 一种支盘桩施工用多功能装置及其施工方法 WO2023197398A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210375315.9A CN114775598B (zh) 2022-04-11 2022-04-11 一种支盘桩施工用多功能装置及其施工方法
CN202210375315.9 2022-04-11

Publications (1)

Publication Number Publication Date
WO2023197398A1 true WO2023197398A1 (zh) 2023-10-19

Family

ID=82428575

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/093197 WO2023197398A1 (zh) 2022-04-11 2022-05-17 一种支盘桩施工用多功能装置及其施工方法

Country Status (3)

Country Link
CN (1) CN114775598B (zh)
LU (1) LU505667B1 (zh)
WO (1) WO2023197398A1 (zh)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202055239U (zh) * 2011-04-12 2011-11-30 中国建筑第七工程局有限公司 一种支盘桩挤扩旋削装置
CN203789006U (zh) * 2014-04-28 2014-08-27 嘉兴职业技术学院 一种蛋糕成型设备上的协同组件
CN104970707A (zh) * 2014-04-28 2015-10-14 嘉兴职业技术学院 一种蛋糕成型设备
CN205100879U (zh) * 2015-10-25 2016-03-23 湖北中阔岩土机械化工程有限公司 一种镰叶式旋挖挤扩钻机
CN205117214U (zh) * 2015-10-25 2016-03-30 湖北中阔岩土机械化工程有限公司 一种旋挖挤扩钻机
CN106194034A (zh) * 2016-08-31 2016-12-07 中冶天工集团有限公司 一种用于桩基扩径成孔的液压可调式钻头装置及其施工方法
JP2019015087A (ja) * 2017-07-06 2019-01-31 創伸産業株式会社 地盤補強工法及び地盤補強用ケーシング
CN111042738A (zh) * 2019-12-25 2020-04-21 长安大学 一种旋转切扩支盘桩机及切扩支盘桩的施工方法
CN111456638A (zh) * 2020-04-27 2020-07-28 中建一局集团建设发展有限公司 一种用于双层地基旋扩圆台桩施工的切削钻头及施工方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001020650A (ja) * 1999-07-02 2001-01-23 Iwanami Consulting Kk アンカーホールの削孔方法及び削孔装置
JP2003161091A (ja) * 2001-11-28 2003-06-06 Chubu Electric Power Co Inc 拡径掘削機
CN205907677U (zh) * 2016-05-27 2017-01-25 刘录怀 一种扩孔桩及其钻具
CN108086930B (zh) * 2018-01-29 2024-03-26 吉林大学 松软岩土地层反循环跟管钻具及钻进工艺
CN211397459U (zh) * 2019-12-31 2020-09-01 江苏东合南岩土科技股份有限公司 一种扩孔钻头
CN112049574A (zh) * 2020-09-28 2020-12-08 陕西百骏千驹建设工程有限公司 一种可配套旋挖钻机使用的孔底扩径钻头

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202055239U (zh) * 2011-04-12 2011-11-30 中国建筑第七工程局有限公司 一种支盘桩挤扩旋削装置
CN203789006U (zh) * 2014-04-28 2014-08-27 嘉兴职业技术学院 一种蛋糕成型设备上的协同组件
CN104970707A (zh) * 2014-04-28 2015-10-14 嘉兴职业技术学院 一种蛋糕成型设备
CN205100879U (zh) * 2015-10-25 2016-03-23 湖北中阔岩土机械化工程有限公司 一种镰叶式旋挖挤扩钻机
CN205117214U (zh) * 2015-10-25 2016-03-30 湖北中阔岩土机械化工程有限公司 一种旋挖挤扩钻机
CN106194034A (zh) * 2016-08-31 2016-12-07 中冶天工集团有限公司 一种用于桩基扩径成孔的液压可调式钻头装置及其施工方法
JP2019015087A (ja) * 2017-07-06 2019-01-31 創伸産業株式会社 地盤補強工法及び地盤補強用ケーシング
CN111042738A (zh) * 2019-12-25 2020-04-21 长安大学 一种旋转切扩支盘桩机及切扩支盘桩的施工方法
CN111456638A (zh) * 2020-04-27 2020-07-28 中建一局集团建设发展有限公司 一种用于双层地基旋扩圆台桩施工的切削钻头及施工方法

Also Published As

Publication number Publication date
CN114775598A (zh) 2022-07-22
CN114775598B (zh) 2023-04-25
LU505667A1 (en) 2024-01-08
LU505667B1 (en) 2024-04-04

Similar Documents

Publication Publication Date Title
JPS627747Y2 (zh)
WO2008049292A1 (fr) Engin de forage, extrusion et expansion et sa méthode d'utilisation
CN105507294A (zh) π桩与矩形桩联合工作设备
CN203175403U (zh) 一种旋挖钻机干法钻进成孔扩底钻头
CN106812470B (zh) 一种扩孔钻具
CN202157750U (zh) 分段式液压扩底钻斗
WO2023197398A1 (zh) 一种支盘桩施工用多功能装置及其施工方法
CN105696583A (zh) 八边形桩与h桩插扣设备
CN116378562A (zh) 一种方形桩桩孔旋挖设备及其使用方法
CN105568968A (zh) 楔形插扣t形桩钻搅机
JPH11350473A (ja) 鋼管杭の施工方法
CN207974768U (zh) 旋挖挤扩钻头以及包括其的旋挖钻机
CN106894765A (zh) 一种扩孔钻具
CN105714800A (zh) H桩与正方形桩锁扣设备
CN111851477A (zh) 旋挖螺纹桩施工方法及其装置
CN217001670U (zh) 一种用于静钻根植桩扩大头施工钻头
CN105715202A (zh) H桩与正方形桩锁口设备
CN105714799A (zh) 正方形桩与h桩扣合装置
CN206707633U (zh) 一种扩孔钻具
CN105484238A (zh) H形单插扣钻搅机
CN220929292U (zh) 一种基于旋挖的异形桩钻头
CN111425145A (zh) 一种管幕施工用的钻头装置
CN205778551U (zh) 一种挤土桩成桩钻具
KR101578127B1 (ko) 회동식 굴착직경 조절형 지반천공장치 및 이를 이용한 굴착직경 확장형 지반 천공 공법
CN220551064U (zh) 一种挤扩支盘变径桩成孔施工设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22937040

Country of ref document: EP

Kind code of ref document: A1