WO2023245766A1 - 一种环保型海底dcm桩头清除施工工艺 - Google Patents

一种环保型海底dcm桩头清除施工工艺 Download PDF

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Publication number
WO2023245766A1
WO2023245766A1 PCT/CN2022/105388 CN2022105388W WO2023245766A1 WO 2023245766 A1 WO2023245766 A1 WO 2023245766A1 CN 2022105388 W CN2022105388 W CN 2022105388W WO 2023245766 A1 WO2023245766 A1 WO 2023245766A1
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Prior art keywords
excavation
dcm
breaking
pile head
platform
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PCT/CN2022/105388
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English (en)
French (fr)
Inventor
马定强
黎忠豪
廖曾平
钟旭华
杨振华
张鹏
喻明杰
张营开
胡前
罗自强
李川
郑文进
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中交广州航道局有限公司
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Publication of WO2023245766A1 publication Critical patent/WO2023245766A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/04—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by cutting-off under water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/04—Guide devices; Guide frames
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/47—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/48—Drag-lines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/58—Component parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/58—Component parts
    • E02F3/60—Buckets, scrapers, or other digging elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/006—Dredgers or soil-shifting machines for special purposes adapted for working ground under water not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/06—Floating substructures as supports
    • E02F9/062—Advancing equipment, e.g. spuds for floating dredgers
    • E02F9/065—Advancing equipment, e.g. spuds for floating dredgers characterised by the use of lines with anchors and winches
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/14—Booms only for booms with cable suspension arrangements; Cable suspensions
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • E02F9/2029—Controlling the position of implements in function of its load, e.g. modifying the attitude of implements in accordance to vehicle speed

Definitions

  • the invention relates to the field of submarine DCM pile head removal construction technology, specifically an environmentally friendly submarine DCM pile head removal construction technology.
  • Underwater deep cement mixing pile (referred to as DCM pile) is an advanced underwater soft foundation treatment technology that uses cement as a curing agent.
  • the soft soil or sand and the curing agent are forcibly mixed in the foundation through a deep mixing machine to harden the soft foundation. Improving the strength of the foundation is one of the key technologies for realizing large-scale projects such as undersea tunnels.
  • overgrouting is generally performed, and the height of the overgrouting is generally 0.5-1.0m.
  • the pile bodies of DCM piles that exceed the design elevation of the foundation trench need to be removed. , ensure that the excavation elevation of the subsea tunnel foundation trench meets the design requirements
  • the present invention proposes an environmentally friendly seabed DCM pile head cleaning construction technology.
  • an environmentally friendly seabed DCM pile head removal construction process according to the present invention, which construction process includes the following steps:
  • S1 Overhaul various construction equipment of the water breaking and excavation platform, and prepare for the breaking and excavation of the main body of the DCM pile head;
  • S2 Move the water-based breaking and excavation platform above the area to be broken and excavated, and import the drawn DCM pile head main body breaking and excavation point layout into the GPS control system of the DCM pile head main body breaking and excavation control room.
  • the anchor cable is used to fix the above-water demolition and excavation platform, and the GPS positioning system on the top of the boom is used to accurately position the grab;
  • S6 Analyze the three-dimensional landforms after excavation, and continue construction in accordance with S4-S5 for under-excavated areas that have not reached the design elevation until all areas reach the design elevation;
  • the S3 is specifically based on the evaluation and analysis of the construction effects of typical construction tests and it is concluded that the DCM overgrouted pile body needs to be broken and excavated in two layers, thereby effectively avoiding over-excavation or under-excavation in one excavation.
  • the first layer shall be excavated 0.3m and the second layer shall be excavated 0.2m.
  • adjacent buckets should be stacked 0.5m left and right in the direction parallel to the foundation trench.
  • the DCM super-grouted pile body needs to be broken and excavated in two layers, with overlapping buckets of 1-1.5m in the vertical foundation trench direction to prevent leakage of excavation, effectively break the pile head, and ensure construction quality.
  • the above-water demolition and excavation platform in S1 includes a hull and a deck.
  • the four corners of the hull are fixedly connected with anchor cables.
  • the demolition and excavation equipment and living area are provided on the deck.
  • the above-water demolition and excavation platform A turntable is provided on the right side of the turntable.
  • a demolition and excavation control room is provided at the top of the turntable.
  • the demolition and excavation control room is hinged with the bottom end of the boom.
  • the top of the demolition and excavation control room is provided with a traction device.
  • the traction equipment is connected to the grab bucket through a traction rope, and a GPS positioning system is fixedly connected to the top of the boom.
  • the S4 is specifically to control the water excavation platform to achieve directional and quantitative forward, left, and right movements by controlling the retraction and release of the anchor cable during the construction process.
  • the GPS on the top of the boom is used.
  • the positioning system accurately locates the excavation points of the main body of the DCM pile head, and performs excavation excavations in sequence.
  • the water breaking and excavation platform is moved to the next area for breaking and excavation construction.
  • the present invention realizes the precise and efficient removal and excavation of the main body of the underwater DCM pile head, avoids under-excavation and over-excavation, and ensures the smoothness of the removal interface, thus ensuring the construction quality and the construction process at the same time. It will not cause damage to aquatic life, reduces the impact of the immersed tube tunnel foundation trench on the underwater ecological environment, and solves the problem.
  • the application of DCM technology in our country is mainly concentrated on land, even if it is used in soft soil foundation treatment such as riverside ports. There is no need to remove the pile body of the overfilled part, which is a problem that is inconvenient when cleaning the cement mixing piles on the seabed with the existing technology.
  • Figure 1 is a schematic front structural view of the above-water demolition and excavation platform of the present invention
  • Figure 2 is a schematic structural diagram of the above-water demolition and excavation platform of the present invention.
  • Figure 3 is a schematic flow chart of the method of the present invention.
  • the construction process includes the following steps:
  • S6 Analyze the three-dimensional landforms after excavation, and continue construction in accordance with S4-S5 for under-excavated areas that have not reached the design elevation until all areas reach the design elevation;
  • the underwater DCM pile head main body 6 is accurately and efficiently broken and excavated, avoiding under-excavation and over-excavation, ensuring the smoothness of the breaking interface, thereby ensuring the construction quality, while the construction process It will not cause damage to aquatic life, reduces the impact of the immersed tube tunnel foundation trench on the underwater ecological environment, and solves the problem.
  • the application of DCM technology in our country is mainly concentrated on land, even if it is used in soft soil foundation treatment such as riverside ports. There is no need to remove the pile body of the overfilled part, which is a problem that is inconvenient when cleaning the cement mixing piles on the seabed with the existing technology.
  • the S3 is specifically based on the evaluation and analysis of the construction effects of typical construction tests and it is concluded that the DCM overgrouted pile body needs to be broken and excavated in two layers, thereby effectively avoiding over-excavation or under-excavation in one excavation.
  • the DCM overgrouted pile body needs to be broken and excavated in two layers, the first layer is excavated 0.3m, and the second layer is excavated 0.2m.
  • the DCM super-grouted pile body needs to be broken and excavated in two layers, and the adjacent buckets should be stacked 0.5m left and right in the direction parallel to the foundation trench.
  • the DCM super-grouted pile body needs to be broken and excavated in two layers, with overlapping buckets of 1-1.5m in the vertical foundation trench direction to prevent leakage of excavation, effectively break the pile head, and ensure construction quality.
  • the above-water demolition and excavation platform 1 in S1 includes a hull and a deck 9.
  • the four corners of the hull are fixedly connected with anchor cables 7.
  • the deck 9 is provided with demolition and excavation equipment and a living area 11.
  • the breaking and excavation control room 11 is hinged with the bottom end of the boom 3.
  • the top of the excavation control room 11 is provided with a traction device 12, which is connected to the grab bucket 5 through a traction cable, and the top of the boom 3 is fixedly connected with a GPS positioning system 8.
  • the S4 specifically means that during the construction process, by controlling the retraction and release of the anchor cable 7, the above-water excavation platform 1 is controlled to achieve directional and quantitative forward, left, and right movements, and by controlling the rotation angle of the turntable 2, the crane arm is used.
  • the GPS positioning system 8 at the top of 3 performs precise positioning of the excavation points of the DCM pile head body 6, and the excavation points are excavated in sequence.
  • the first step inspect various construction equipment of the above-water demolition and excavation platform 1, and prepare for the demolition and excavation construction of the DCM pile head body 6; the second step: move the above-water demolition and excavation platform 1 to the location to be demolished Above the excavation area, import the drawn DCM pile head body 6 breaking and excavation point layout into the GPS control system of the DCM pile head body 6 breaking and excavation control room 1110, and fix the above-water breaking and excavation platform through the hanging anchor cable 7 1.
  • Step 3 Select the DCM test area to conduct a typical construction test of demolition and excavation;
  • Step 4 Lower the grab 5 to the main body of the DCM pile head Carry out breaking and excavation at 6 places;
  • Step 5 After the breaking and excavation is completed, drive the water breaking and excavation platform 1 out of the first excavation area 13, conduct multi-beam water depth measurement of the second excavation area 14, and establish the second excavation Excavate the three-dimensional landforms of area 14;
  • Step 6 Analyze the three-dimensional landforms after the excavation, and continue construction in the under-excavated areas that have not reached the design elevation according to steps four to five until all areas reach the design elevation;
  • Step 7 Fix the grab 5 on the deck 9, rotate the boom 3 to above the water breaking and excavation platform 1, maintain the mechanical equipment, and prepare for the breaking and excavation in the next area.
  • the directional mobile platform is realized Complete excavation of the main body 6 of the DCM pile head.

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  • Civil Engineering (AREA)
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Abstract

一种环保型海底DCM桩头清除施工工艺，该施工工艺包括以下步骤：第一步：检修水上破除开挖平台（1）的各类施工设备；第二步：将水上破除开挖平台（1）行驶移至待破除开挖区域上方，通过绞锚缆（7）固定水上破除开挖平台（1）；第三步：选取DCM试验区域进行破除开挖典型施工试验；第四步：将抓斗（5）下放至DCM桩头主体（6）处进行破除开挖；第五步：将水上破除开挖平台（1）驶出第一开挖区域（13），对第二开挖区域（14）进行多波束水深测量，建立第二开挖区域（14）的三维地貌图形；第六步：分析破除开挖后的三维地貌图形，对没有达到设计标高的欠挖区域按照第四至第五步继续施工；第七步：进行下一区域的破除开挖准备工作，以此循环。

Description

一种环保型海底DCM桩头清除施工工艺 技术领域
本发明涉及海底DCM桩头清除施工工艺领域，具体是一种环保型海底DCM桩头清除施工工艺。
背景技术
水下深层水泥搅拌桩(简称DCM桩)是利用水泥作为固化剂的一种水下软基处理先进技术，通过深层搅拌机械在地基将软土或沙等和固化剂强制拌和，使软基硬结而提高地基强度，是实现海底隧道等大型工程的关键技术之一，在基槽开挖前，利用深层搅拌机械设备一边钻进一边往地基软土中喷射浆液或者分粉体固化剂，借助搅拌轴的旋转搅拌，将其与地基中的沙或软土进行充分混合，使地基土与这些固化材料发生一系列的物理、化学反应，使得软土地基硬结，形成具有整体性以及水稳性的桩柱体。
为了确保桩顶混凝土质量，一般会进行超灌，而超灌的高度一般在0.5-1.0m，在海底隧道基槽开挖过程中，需将超过基槽设计标高的DCM桩的桩体进行清除，确保海底隧道基槽开挖标高符合设计要求
目前我国对DCM技术的应用主要集中在陆地，就算应用在沿河港口等软土地基处理上也无需要对超灌部分的桩体进行破除，现有技术在对海底的水泥搅拌桩进行清理时较为不便；因此，针对上述问题提出一种环保型海底DCM桩头清除施工工艺。
发明内容
为了弥补现有技术的不足，目前我国对DCM技术的应用主要集中在陆地，就算应用在沿河港口等软土地基处理上也无需要对超灌部分的桩体进行破除，现有技术在对海底的水泥搅拌桩进行清理时较为不便的问题，本发明提出一种环保型海底DCM桩头清除施工工艺。
本发明解决其技术问题所采用的技术方案是：本发明所述的一种环保型 海底DCM桩头清除施工工艺，该施工工艺包括以下步骤：
S1：检修水上破除开挖平台的各类施工设备，进行DCM桩头主体破除开挖施工的准备工作；
S2：将水上破除开挖平台行驶移至待破除开挖区域上方，将绘制好的DCM桩头主体破除开挖点位布置图导入DCM桩头主体破除破除开挖控制室的GPS控制系统，通过绞锚缆固定水上破除开挖平台，利用吊臂顶端的GPS定位系统对抓斗进行精准定位；
S3：选取DCM试验区域进行破除开挖典型施工试验；
S4：将抓斗下放至DCM桩头主体处进行破除开挖；
S5：破除开挖完成后，将水上破除开挖平台驶出第一开挖区域，对第二开挖区域进行多波束水深测量，建立第二开挖区域的三维地貌图形；
S6：分析破除开挖后的三维地貌图形，对没有达到设计标高的欠挖区域按照S4-S5继续施工，直至所有区域达到设计标高；
S7：将抓斗固定在甲板上，吊臂旋转至水上破除开挖平台上方，机械设备保养维护，进行下一区域的破除开挖准备工作，以此循环，定向移动平台实现对DCM桩头主体的全部破除开挖。
优选的，所述S3具体为通过典型施工试验施工效果进行评价分析得出需分两层对DCM超灌桩体进行破除开挖，从而有效避免一次开挖出现超挖或欠挖现象。
优选的，所述S3中需分两层对DCM超灌桩体进行破除开挖时第一层开挖0.3m、第二层开挖0.2m。
优选的，所述S3中需分两层对DCM超灌桩体进行破除开挖时相邻斗之间在平行基槽方向左右叠斗0.5m。
优选的，所述S3中需分两层对DCM超灌桩体进行破除开挖时垂直基槽方向各按1-1.5m重叠布斗，以防止漏挖以便有效破除桩头，保证施工质量。
优选的，所述S1中的水上破除开挖平台包括船体和甲板，所述船体的四角固定连接有锚缆，所述甲板上设置有破除开挖设备及生活区，所述水上破除开挖平台的右侧设置有转盘，所述转盘的顶端设置有破除开挖控制室，所述破除开挖控制室与吊臂的底端铰接，所述破除开挖控制室的顶端设置有牵引设备，所述牵引设备通过牵引索与抓斗连接，所述吊臂的顶端固定连接有GPS定位系统。
优选的，所述S4具体为在施工过程中，通过对锚缆的收放控制，控制水上破除开挖平台实现定向和定量的前后左右移动，通过控制转盘的旋转角度，利用吊臂顶端的GPS定位系统进行DCM桩头主体破除开挖点位的精确定位，对开挖点位按照顺序破除开挖。
优选的，所述S4中在吊臂可移动控制范围内的DCM桩头主体破除开挖完毕后，移动水上破除开挖平台到下一区域内进行破除开挖施工。
本发明的有益之处在于：
1.本发明通过S1-7中的方法，实现了精准高效地实现水下DCM桩头主体破除开挖，避免了欠挖、超挖，保障了破除界面平整，从而保证施工质量，同时施工过程中不会对水生生物造成破坏，降低了沉管隧道基槽中对水下生态环境的影响，解决了目前我国对DCM技术的应用主要集中在陆地，就算应用在沿河港口等软土地基处理上也无需要对超灌部分的桩体进行破除，现有技术在对海底的水泥搅拌桩进行清理时较为不便的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本发明的水上破除开挖平台正视结构示意图；
图2为本发明的水上破除开挖平台俯视结构示意图；
图3为本发明的方法流程结构示意图。
图中：1、水上破除开挖平台；2、转盘；3、吊臂；5、抓斗；6、DCM桩头主体；7、锚缆；8、GPS定位系统；9、甲板；10、破除开挖控制室；11、破除开挖设备及生活区；12、牵引设备；13、第一开挖区域；14、第二开挖区域。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅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做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
实施例一
请参阅图1-3所示，一种环保型海底DCM桩头主体6清除施工工艺，该施工工艺包括以下步骤：
S1：检修水上破除开挖平台1的各类施工设备，进行DCM桩头主体6破除开挖施工的准备工作；
S2：将水上破除开挖平台1行驶移至待破除开挖区域上方，将绘制好的DCM桩头主体6破除开挖点位布置图导入DCM桩头主体6破除破除开挖控制室1110的GPS控制系统，通过绞锚缆7固定水上破除开挖平台1，利用吊臂3顶端的GPS定位系统8对抓斗5进行精准定位；
S3：选取DCM试验区域进行破除开挖典型施工试验；
S4：将抓斗5下放至DCM桩头主体6处进行破除开挖；
S5：破除开挖完成后，将水上破除开挖平台1驶出第一开挖区域13，对第二开挖区域14进行多波束水深测量，建立第二开挖区域14的三维地貌图形；
S6：分析破除开挖后的三维地貌图形，对没有达到设计标高的欠挖区域按照S4-S5继续施工，直至所有区域达到设计标高；
S7：将抓斗5固定在甲板9上，吊臂3旋转至水上破除开挖平台1上方，机械设备保养维护，进行下一区域的破除开挖准备工作，以此循环，定向移动平台实现对DCM桩头主体6的全部破除开挖；
工作时，通过S1-7中的方法，实现了精准高效地实现水下DCM桩头主体6破除开挖，避免了欠挖、超挖，保障了破除界面平整，从而保证施工质量，同时施工过程中不会对水生生物造成破坏，降低了沉管隧道基槽中对水下生态环境的影响，解决了目前我国对DCM技术的应用主要集中在陆地，就算应用在沿河港口等软土地基处理上也无需要对超灌部分的桩体进行破除，现有技术在对海底的水泥搅拌桩进行清理时较为不便的问题。
进一步的，所述S3具体为通过典型施工试验施工效果进行评价分析得出需分两层对DCM超灌桩体进行破除开挖，从而有效避免一次开挖出现超挖或欠挖现象。
进一步的，所述S3中需分两层对DCM超灌桩体进行破除开挖时第一层开挖0.3m、第二层开挖0.2m。
进一步的，所述S3中需分两层对DCM超灌桩体进行破除开挖时相邻斗之间在平行基槽方向左右叠斗0.5m。
进一步的，所述S3中需分两层对DCM超灌桩体进行破除开挖时垂直基槽方向各按1-1.5m重叠布斗，以防止漏挖以便有效破除桩头，保证施工质量。
进一步的，所述S1中的水上破除开挖平台1包括船体和甲板9，所述船体的四角固定连接有锚缆7，所述甲板9上设置有破除开挖设备及生活区11，所述水上破除开挖平台1的右侧设置有转盘2，所述转盘2的顶端设置有破除开挖控制室11，所述破除开挖控制室11与吊臂3的底端铰接，所述破除开挖控制室11的顶端设置有牵引设备12，所述牵引设备12通过牵引索与抓斗5 连接，所述吊臂3的顶端固定连接有GPS定位系统8。
进一步的，所述S4具体为在施工过程中，通过对锚缆7的收放控制，控制水上破除开挖平台1实现定向和定量的前后左右移动，通过控制转盘2的旋转角度，利用吊臂3顶端的GPS定位系统8进行DCM桩头主体6破除开挖点位的精确定位，对开挖点位按照顺序破除开挖。
进一步的，所述S4中在吊臂3可移动控制范围内的DCM桩头主体6破除开挖完毕后，移动水上破除开挖平台1到下一区域内进行破除开挖施工。
工作原理：第一步：检修水上破除开挖平台1的各类施工设备，进行DCM桩头主体6破除开挖施工的准备工作；第二步：将水上破除开挖平台1行驶移至待破除开挖区域上方，将绘制好的DCM桩头主体6破除开挖点位布置图导入DCM桩头主体6破除破除开挖控制室1110的GPS控制系统，通过绞锚缆7固定水上破除开挖平台1，利用吊臂3顶端的GPS定位系统8对抓斗5进行精准定位；第三步：选取DCM试验区域进行破除开挖典型施工试验；第四步：将抓斗5下放至DCM桩头主体6处进行破除开挖；第五步：破除开挖完成后，将水上破除开挖平台1驶出第一开挖区域13，对第二开挖区域14进行多波束水深测量，建立第二开挖区域14的三维地貌图形；第六步：分析破除开挖后的三维地貌图形，对没有达到设计标高的欠挖区域按照第四步至第五步继续施工，直至所有区域达到设计标高；第七步：将抓斗5固定在甲板9上，吊臂3旋转至水上破除开挖平台1上方，机械设备保养维护，进行下一区域的破除开挖准备工作，以此循环，定向移动平台实现对DCM桩头主体6的全部破除开挖。
在本说明书的描述中，参考术语“一个实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结 构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。

Claims (8)

  1. 一种环保型海底DCM桩头清除施工工艺，其特征在于：该施工工艺包括以下步骤：
    S1：检修水上破除开挖平台(1)的各类施工设备，进行DCM桩头主体(6)破除开挖施工的准备工作；
    S2：将水上破除开挖平台(1)行驶移至待破除开挖区域上方，将绘制好的DCM桩头主体(6)破除开挖点位布置图导入DCM桩头主体(6)破除破除开挖控制室(11)(10)的GPS控制系统，通过绞锚缆(7)固定水上破除开挖平台(1)，利用吊臂(3)顶端的GPS定位系统(8)对抓斗(5)进行精准定位；
    S3：选取DCM试验区域进行破除开挖典型施工试验；
    S4：将抓斗(5)下放至DCM桩头主体(6)处进行破除开挖；
    S5：破除开挖完成后，将水上破除开挖平台(1)驶出第一开挖区域(13)，对第二开挖区域(14)进行多波束水深测量，建立第二开挖区域(14)的三维地貌图形；
    S6：分析破除开挖后的三维地貌图形，对没有达到设计标高的欠挖区域按照S4-S5继续施工，直至所有区域达到设计标高；
    S7：将抓斗(5)固定在甲板(9)上，吊臂(3)旋转至水上破除开挖平台(1)上方，机械设备保养维护，进行下一区域的破除开挖准备工作，以此循环，定向移动平台实现对DCM桩头主体(6)的全部破除开挖。
  2. 根据权利要求1所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S3具体为通过典型施工试验施工效果进行评价分析得出需分两层对DCM超灌桩体进行破除开挖，从而有效避免一次开挖出现超挖或欠挖现象。
  3. 根据权利要求2所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S3中需分两层对DCM超灌桩体进行破除开挖时第一层开挖0.3m、 第二层开挖0.2m。
  4. 根据权利要求3所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S3中需分两层对DCM超灌桩体进行破除开挖时相邻斗之间在平行基槽方向左右叠斗0.5m。
  5. 根据权利要求4所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S3中需分两层对DCM超灌桩体进行破除开挖时垂直基槽方向各按1-1.5m重叠布斗，以防止漏挖以便有效破除桩头，保证施工质量。
  6. 根据权利要求5所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S1中的水上破除开挖平台(1)包括船体和甲板(9)，所述船体的四角固定连接有锚缆(7)，所述甲板(9)上设置有破除开挖设备及生活区(11)，所述水上破除开挖平台(1)的右侧设置有转盘(2)，所述转盘(2)的顶端设置有破除开挖控制室(11)，所述破除开挖控制室(11)与吊臂(3)的底端铰接，所述破除开挖控制室(11)的顶端设置有牵引设备(12)，所述牵引设备(12)通过牵引索与抓斗(5)连接，所述吊臂(3)的顶端固定连接有GPS定位系统(8)。
  7. 根据权利要求6所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S4具体为在施工过程中，通过对锚缆(7)的收放控制，控制水上破除开挖平台(1)实现定向和定量的前后左右移动，通过控制转盘(2)的旋转角度，利用吊臂(3)顶端的GPS定位系统(8)进行DCM桩头主体(6)破除开挖点位的精确定位，对开挖点位按照顺序破除开挖。
  8. 根据权利要求7所述的一种环保型海底DCM桩头清除施工工艺，其特征在于：所述S4中在吊臂(3)可移动控制范围内的DCM桩头主体(6)破除开挖完毕后，移动水上破除开挖平台(1)到下一区域内进行破除开挖施工。
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