US20210348355A1 - Grouting consolidation method for full casing borehole guide prefabricated pile and prefabricated pile therefor - Google Patents

Grouting consolidation method for full casing borehole guide prefabricated pile and prefabricated pile therefor Download PDF

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Publication number
US20210348355A1
US20210348355A1 US17/277,860 US201917277860A US2021348355A1 US 20210348355 A1 US20210348355 A1 US 20210348355A1 US 201917277860 A US201917277860 A US 201917277860A US 2021348355 A1 US2021348355 A1 US 2021348355A1
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United States
Prior art keywords
borehole
casing
base rock
layer
drilling
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Abandoned
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US17/277,860
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English (en)
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Yongguang GAO
Yunfei Gao
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Beijing Keruihengji Construction Technology Development Co Ltd
Gao Yongguang
Gao Yunfei
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Individual
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Assigned to BEIJING KERUIHENGJI CONSTRUCTION TECHNOLOGY DEVELOPMENT CO., LTD., GAO, Yunfei, GAO, Yongguang reassignment BEIJING KERUIHENGJI CONSTRUCTION TECHNOLOGY DEVELOPMENT CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GAO, Yongguang, GAO, Yunfei
Publication of US20210348355A1 publication Critical patent/US20210348355A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/06—Placing concrete under water
    • 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
    • E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/52—Submerged foundations, i.e. submerged in open water
    • E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
    • 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
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • 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
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
    • 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
    • E02D7/26—Placing by using several means simultaneously
    • 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
    • E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork

Definitions

  • the present application relates to the technical field of foundations, in particular to grouting consolidation method for full casing borehole guide prefabricated pile and prefabricated pile therefor.
  • the present application is intended to provide a grouting consolidation method for full casing borehole guide prefabricated pile and prefabricated pile therefor so as to solve the problem in prior art that cast-in-place bored pile foundation construction has a large amount of construction work, long construction period and high construction cost in foundations construction in water area with various stratum conditions, especially in the foundation construction in marine engineering.
  • the application provides a grouting consolidation method for full casing borehole guide prefabricated pile, which can be used in the foundation construction of water projects, and comprises the following steps:
  • the implanting a prefabricated pile into the borehole so that the prefabricated pile reaches a hole bottom of the borehole in step S3 comprises the following steps: pre-injecting a slurry into the borehole; before solidification of the slurry, the prefabricated pile is implanted into the borehole to reach the hole bottom of the bore.
  • the prefabricated pile is prefabricated with a grouting channel for injecting the slurry into the borehole
  • the pulling out the casing in step S5 comprises continuously grouting into the borehole through the grouting channel on the prefabricated pile during the process of pulling out the casing
  • the injecting the slurry into the borehole in step S4 comprises grouting into the borehole through the grouting channel on the prefabricated pile before pulling out the casing.
  • the grouting channel comprises a first grouting channel on a bottom surface of the prefabricated pile; the pulling out the casing in step S5 comprises continuously grouting into the borehole through the first grouting channel during the process of pulling out the casing, and/or the injecting the slurry into the borehole in step S4 comprises grouting into the borehole through the first grouting channel before pulling out the casing.
  • the grouting channel comprises a second grouting channel located at a side of the prefabricated pile for grouting between the prefabricated pile and the bore hole; and the method further comprises a step S6, grouting between the prefabricated pile and the bore hole through the second grouting channel.
  • An upper end of the prefabricated pile is located above a water surface of the water area, and/or an upper end of the prefabricated pile is located below a water surface of the water area.
  • the slurry comprises cement slurry and/or mortar and/or chemical slurry.
  • a prefabricated pile comprising
  • the pile body is a reinforced concrete prefabricated pile
  • the grouting channel is a grouting pipe prefabricated on a steel cage of the pile body.
  • the application provides a grouting consolidation method for full casing borehole guide prefabricated pile, which can be used in the foundation construction of water projects, and comprises the following steps:
  • the present application In order to adapt to the stratums of various water projects, especially the marine engineering environment, wherein the construction of the marine engineering is performed above the surface of rivers and lakes, the present application firstly provide a casing to cooperate to drill holes, then guides the prefabricated pile into the hole bottom of the borehole, and finally injects a slurry to solidify to realize the construction of water area stratums. Since the foundation of water project has high requirements for construction intensity, casing can be used to assist drilling to adapt to different stratum structures underwater. Guiding prefabricated piles into the bottom of the borehole can effectively ensure a stable and reliable foundation construction of water projects. Through the above methods, the construction of pile foundations in rivers, lakes and seas and other water areas can be realized.
  • the implanting a prefabricated pile into the borehole so that the prefabricated pile reaches a hole bottom of the borehole in step S3 comprises the following steps: pre-injecting a slurry into the borehole; before solidification of the slurry, the prefabricated pile is implanted into the borehole to reach the hole bottom of the bore.
  • pre-injecting the slurry into the borehole before implanting the prefabricated pile in the borehole the prefabricated pile and the slurry in the borehole can be fully cemented.
  • a descending impact force of the prefabricated piles can also effectively cause the slurry to enter the bottom of the borehole, thereby forming a larger and solid bottom-fixing head of the borehole 2 .
  • the prefabricated pile is prefabricated with a grouting channel for injecting the slurry into the borehole
  • the pulling out the casing in step S5 comprises continuously grouting into the borehole through the grouting channel on the prefabricated pile during the process of pulling out the casing, and during this process, the slurry can flow into the borehole simply and conveniently through the grouting channel of the prefabricated pile to fill the gap generated in this process.
  • the prefabricated pile and the stratums around the borehole can be tightly cemented and fixed to be adapted to various stratums, but also make the pulling of the casing smoother, and reduce operation difficulty, thereby solving the problem that the existing cast-in-place bored pile foundation in water has large amount of engineering work, long engineering period and high engineering cost.
  • the injecting the slurry into the borehole in step S4 comprises grouting into the borehole through the grouting channel on the prefabricated pile before pulling out the casing.
  • the operation of grouting into the borehole through the grouting channel on the prefabricated pile before pulling out the casing or directly injecting the slurry into the borehole is simple and convenient, which can make the prefabricated pile and the stratum around the borehole 2 tightly cemented and fixed together to form a prefabricated pile foundation, thereby improving a connection strength of the prefabricated pile, soil, and sand in the marine engineering environment.
  • the grouting channel comprises a first grouting channel on a bottom surface of the prefabricated pile.
  • the driving a drilling rig carrying a casing to perform borehole construction to a preset hole depth in step S1 comprises the following steps: sinking the casing to the base rock layer, sinking a drilling bit of the drilling rig to the base rock layer through the inner cavity of the casing, and drilling the base rock layer to form a base rock borehole in the base rock layer; the removing the drilling bit of the drilling rig from the base rock borehole, and housing the casing in the base rock borehole in step S2 comprises removing the drilling bit of the drilling rig from the base rock borehole and the casing sequentially, and a lower end of the casing entering an opening edge of the inner cavity of the base rock borehole; and the borehole comprises the base rock borehole.
  • the drilling bit of the drilling rig passes through the casing to drill the base rock layer, which can effectively solve the problem that the base rock layer is difficult to be constructed in the construction process of the water area with the base rock layer at the bottom thereof.
  • the descending impact effect of the prefabricated piles can effectively make more slurry to fully filtrate into and consolidate with the base rock layer, thus the slurry fully fills the bottom and side part of the base rock layer.
  • the driving a drilling rig carrying a casing to perform borehole construction to a preset hole depth in step S1 comprises: sinking the casing to the loose layer, and the drilling rig drilling the loose layer to drive the casing through the loose layer to form a loose layer borehole, removing mud and sand from the casing, sinking the drilling bit of the drilling rig to the base rock layer through the inner cavity of the casing, and drilling the base rock layer to form a base rock borehole in the base rock layer;
  • the removing the drilling bit of the drilling rig from the borehole, and housing the casing in the borehole in step S2 comprises, removing the drilling bit of the drilling rig from the base rock borehole and the casing sequentially, and a lower end of the casing entering an opening edge of the inner cavity of the base rock borehole; and the borehole comprises the loose layer borehole and the base rock borehole.
  • the loose layer is firstly drilled by the drilling bit of the drilling rig, and then the mud and sand is discharged; then, the base rock layer is drilled by a drilling bit passing through the casing, which effectively solves the problem of the construction difficulty of the above water area caused by the loose layer and the base rock layer.
  • the base rock layer and loose layer are filled and fixed respectively through the following steps: pre-injecting the slurry into a base rock borehole, and then filling the base rock borehole by sinking the prefabricated pile into the base rock borehole; then during the process of lifting the casing, the slurry is continuously injected into the loose layer through the grouting channel on the prefabricated pile.
  • Drilling in the base rock is performed in a manner of pre-injecting slurry and then implanting the prefabricated pile, which can effectively make the slurry cemented and fixed with the base rock borehole with sufficient time and the slurry can infiltrate into the base rock more fully under the effect of the impact force of the prefabricated pile.
  • the loose layer is injected with the slurry during the casing is lifted, which can be used to effectively fill the gap between the prefabricated pile and the casing to complete the above grouting work, so that the prefabricated pile and the stratums around the borehole in the loose layer can be cemented and fixed together with the slurry.
  • FIG. 1 is a schematic view showing the installation step of a full casing in a water area with loose layer and base rock layer provided by the present application;
  • FIG. 2 is a schematic view showing the step of pre-injecting the slurry to the base rock layer in the water area with loose layer and base rock layer provided by the present application;
  • FIG. 3 is a schematic view showing the step of sinking the prefabricated pile to a bottom of the pre-injected borehole in a water area with loose layer and base rock layer provided by the present application;
  • FIG. 4 is a schematic view showing the step of taking out a full casing in a water area with loose layer and base rock layer provided by the present application;
  • FIG. 5 is a schematic structural view showing a connection structure between the prefabricated pile and a bottom of the water area with a loose layer and a base rock layer provided by the present application after grouting consolidation process for full casing borehole guide prefabricated pile is completed;
  • FIG. 6 is a schematic structural view showing a prefabricated pile that sinks to the bottom of the borehole provided by the present application
  • FIG. 7 is a schematic view showing a connection structure between the prefabricated pile and the foundation of the environment when the full casing is taken out after grouting consolidation process for full casing borehole provided by the present application.
  • connection should be broadly construed, for example, they may be fixed connection or detachable connection or integral connection; mechanical connection or electrical connection; direct connection, or indirect connection via an intermediate medium, or internal communication between two units; wireless connection or wired connection.
  • connection should be broadly construed, for example, they may be fixed connection or detachable connection or integral connection; mechanical connection or electrical connection; direct connection, or indirect connection via an intermediate medium, or internal communication between two units; wireless connection or wired connection.
  • Example 1 it provides a grouting consolidation method for full casing borehole guide prefabricated pile.
  • the engineering environment for construction is shown in FIGS. 1 to 7 .
  • the grouting consolidation method for full casing borehole guide prefabricated pile comprises the following steps:
  • the grouting channel 5 comprising a first grouting channel 6 on a bottom surface of the prefabricated pile 4 , during the process of pulling out the casing 1 , continuously injecting the slurry into the loose layer borehole 14 through the first grouting channel 6 , so that the prefabricated piles 4 is respectively fixed and cemented with a hole wall and bottom of the base rock borehole 13 and a hole wall of the loose layer borehole 14 into an integrated structure;
  • the base rock layer 9 and loose layer 8 is filled and fixed respectively through the following steps: pre-injecting the slurry into a base rock borehole 13 , and then filling the base rock borehole 13 by sinking the prefabricated pile 4 into the base rock borehole 13 ; then during the process of lifting the casing 1 , continuously injecting the slurry into the loose layer 8 through the grouting channel 5 of the prefabricated pile.
  • the base rock borehole 13 in the base rock is performed in a manner of pre-injecting slurry and then implanting the prefabricated pile 4 , which can effectively make the slurry cemented and fixed with the base rock borehole 13 with sufficient time and the slurry can fully infiltrate into the base rock 9 under the effect of the impact force of the prefabricated pile 4 .
  • the loose layer 8 is injected with the slurry during the casing 1 is lifted, which can be used to effectively fill the gap between the prefabricated pile 4 and the casing 1 to complete the above grouting work, so that the prefabricated pile 4 and the stratums around the loose layer borehole 14 can be cemented and fixed together with the slurry.
  • the present application firstly provide a casing 1 for cooperation with drilling holes, then guides the prefabricated pile 4 into the stratums of the borehole 2 , and finally injects a slurry 3 for consolidation to realize the construction of water area stratums.
  • a certain volume of slurry 3 is injected into the steel casing 1 before the steel casing 1 is pulled out, and the slurry 3 can permeate a soil layer or sand layer at the bottom of the steel casing 1 to make the stratum at bottom of the borehole 2 and the bottom of the prefabricated pile 4 closely cemented together.
  • a solid fixed structure after solidification can be formed at the bottom of the borehole 2 .
  • the slurry 3 can be tightly cemented and fixed with the stratums around the borehole 2 , such that the prefabricated pile 4 and the stratums around the sidewall of the borehole 2 will be tightly cemented and fixed together to form a prefabricated pile foundation, which in turn, improves the connection strength of the prefabricated pile 4 with the soil and sand in the foundation environment or the marine engineering environment.
  • a prefabricated pile comprises:
  • Example 1 the casing 1 is made of metal, and the bottom end of the casing 1 has a tooth-like structure for cutting the soil.
  • the position of the upper end of the prefabricated pile 4 is not specifically limited in the application. In other Examples, the upper end of the prefabricated pile 4 is located below the water surface of the water area.
  • the material and composition of the slurry 3 is not specifically limited in the application.
  • the slurry 3 can also be mortar or chemical slurry, as well as two or three of cement slurry, mortar slurry and chemical slurry. mixture.
  • the present application does not specifically limit the connection manner of the grouting channel 5 and the steel cage.
  • the grouting channel 5 is preset on the steel cage.
  • the present application does not specifically limit the arrangement manner and number of grouting channels on the prefabricated pile 4 .
  • the prefabricated pile 4 only comprises a plurality of first grouting channels 6 located on the bottom surface of the prefabricated pile 4 , or the prefabricated pile 4 only comprises a plurality of second grouting channels 7 on the side surface of the prefabricated pile 4 .
  • the application of the present application does not specifically limit the function of the second grouting channel 7 .
  • the slurry in the process of pulling out the casing 1 , the slurry can be continuously injected into the borehole 14 in the loose layer through the first grouting channel 6 and the second grouting channel 7 .
  • Example 2 differs from Example 1 in that the grouting consolidation method for full casing borehole guide prefabricated pile in the engineering construction environment of the water area having base rock 9 at the bottom thereof, comprise the following steps:
  • the drilling bit of the drilling rig passes through the casing 1 to drill the base rock layer 9 , which can effectively solve the problem that the base rock layer 9 is difficult to be constructed during the construction of the water area with the base rock layer 9 at the bottom thereof.
  • more slurry 3 can effectively infiltrate into and consolidate the rock layer 9 through a descending impact of the prefabricated pile 4 such that the slurry 3 can fully fill in the bottom and side part of the base rock layer 9 .
  • Example 3 differs from Example 1 in that the grouting consolidation method for full casing borehole guide prefabricated pile in the engineering construction environment of the water area having a loose layer 8 at the bottom thereof, comprise the following steps:
  • the grouting channel 5 comprising a first grouting channel 6 on a bottom surface of the prefabricated pile 4 , during the process of pulling out the casing 1 , continuously injecting the slurry into the loose layer borehole 14 through the first grouting channel 6 , so that the prefabricated piles 4 is fixed and cemented with a hole wall and bottom of the loose layer borehole 14 to form an integrated structure.
US17/277,860 2018-09-25 2019-06-14 Grouting consolidation method for full casing borehole guide prefabricated pile and prefabricated pile therefor Abandoned US20210348355A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201811091450.0A CN109295972A (zh) 2018-09-25 2018-09-25 全套管工法预制桩灌注浆和后注浆固结技术
CN201811091450.0 2018-09-25
PCT/CN2019/091230 WO2020062940A1 (zh) 2018-09-25 2019-06-14 全套管钻孔导引预制桩的注浆固结方法及其预制桩

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US20210348355A1 true US20210348355A1 (en) 2021-11-11

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US (1) US20210348355A1 (ja)
EP (1) EP3839149A4 (ja)
JP (1) JP2022502586A (ja)
KR (1) KR20210058901A (ja)
CN (1) CN109295972A (ja)
BR (1) BR112021004781A2 (ja)
CO (1) CO2021003362A2 (ja)
PH (1) PH12021550571A1 (ja)
SG (1) SG11202102769TA (ja)
WO (1) WO2020062940A1 (ja)

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CN113309089A (zh) * 2021-06-11 2021-08-27 河北省水利规划设计研究院有限公司 预制空心桩及其取土植桩施工方法
CN114753376A (zh) * 2022-03-28 2022-07-15 中电建十一局工程有限公司 一种砂砾石地层深基坑开挖支护浆方法
CN115233685A (zh) * 2022-08-01 2022-10-25 中交四航工程研究院有限公司 一种维持桩基水平刚度的可循环注浆装置及其施工方法
CN115288212A (zh) * 2022-07-05 2022-11-04 湖北工业大学 一种既有桩墙的光纤植入装置及植入方法
CN115478560A (zh) * 2022-09-28 2022-12-16 苏州枫石堂工程科技有限公司 一种墙体开裂注浆加固方法

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CN110896644B (zh) * 2018-09-25 2021-04-09 高永光 全套管钻孔导引预制桩的注浆固结方法
CN109295972A (zh) * 2018-09-25 2019-02-01 高永光 全套管工法预制桩灌注浆和后注浆固结技术
CN110565639B (zh) * 2019-09-11 2021-03-23 中船第九设计研究院工程有限公司 一种用于珊瑚砂地基的灌注桩成孔和侧壁注浆施工方法
CN111997620A (zh) * 2020-07-28 2020-11-27 中铁第四勘察设计院集团有限公司 一种岩溶塌陷区的注浆施工系统及方法
CN113250238A (zh) * 2021-05-19 2021-08-13 中交第三航务工程局有限公司 一种基于松动圈理论的海上超大直径单桩的嵌岩施工方法
CN114562328B (zh) * 2022-04-02 2022-12-02 中国矿业大学 基岩顶界松散层注浆充填控制地表沉降方法
CN115075238A (zh) * 2022-06-13 2022-09-20 陕西正诚路桥工程研究院有限公司 基于水上作业平台的钻孔桩施工中的加固方法
CN115323999B (zh) * 2022-09-14 2024-02-27 赤峰中色白音诺尔矿业有限公司 一种尾矿库涵管分段注浆施工装置及其施工方法
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