CN106351231A - Construction method for increasing uplift bearing capacity of soil nailing walls - Google Patents

Construction method for increasing uplift bearing capacity of soil nailing walls Download PDF

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Publication number
CN106351231A
CN106351231A CN201610732647.2A CN201610732647A CN106351231A CN 106351231 A CN106351231 A CN 106351231A CN 201610732647 A CN201610732647 A CN 201610732647A CN 106351231 A CN106351231 A CN 106351231A
Authority
CN
China
Prior art keywords
soil
bag
grouting pipe
intensity
grouting
Prior art date
Application number
CN201610732647.2A
Other languages
Chinese (zh)
Inventor
周泼
王雪梅
Original Assignee
中国二十二冶集团有限公司
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 中国二十二冶集团有限公司 filed Critical 中国二十二冶集团有限公司
Priority to CN201610732647.2A priority Critical patent/CN106351231A/en
Publication of CN106351231A publication Critical patent/CN106351231A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads

Abstract

The invention relates to a construction method for improving the bearing capacity of the soil nailing wall in the construction of the foundation pit support in the soft soil area, comprising the steps of arranging high strength soil bag at the side slope slip surface rear of soil nailing reinforcement;arranging flange plate at both ends of high strength soil bag, and grouting pipe is directly extending to the bottom through flange plate mesoporous on end; placing in-the-bag grouting pipe, out-of-bag disposable grouting pipe and secondary grouting pipe on the soil nailing reinforcement; inserting the ready-made high strength soil bag into the soil nailing hole, and grouting the high strength soil bag with the in-the-bag grouting pipe; after grouting in full, grouting the exterior high strength soil bag via disposable grouting pipe until grouting in full, and after the disposable grout reaching the stipulated strength, conducting secondary grouting via secondary grouting pipe. The construction method improves soil nail uplift bearing capacity by increasing the bond stress of soil nailing reinforcement with cement slurry and surface area and sectional area of anchorage section of soil nailing reinforcement at the slide slope slip surface rear for the enhancement of frictional resistance and end resistance thereof, and ensures the foundation bracing system to meet the safety requirements.

Description

Improve the construction method of soil nail wall anti-pulling capacity

Technical field

The present invention relates to foundation pit, specifically a kind of improve applying of soil nail wall anti-pulling capacity Work method.

Background technology

Low intensity is had due to weak soil, the features such as compressibility is high, sensitivity is high, consolidation cycle is long, using common soil nail wall Carry out during pattern foundation pit supporting structure because after pore-forming hole wall easily cave in, slip casting poor controllability, often do not reach the anti-pulling capacity of design requirement.

Content of the invention

For the deficiency of existing soil nail wall anti-pulling capacity, based on practicality and economy, the present invention provides a kind of raising The construction method of soil nail wall anti-pulling capacity, it is applied to soft soil foundation pit by having ventilative, water permeability high intensity soil engineering bag Supporting construction, ensure that pulling capacity of soil nail bearing capacity meets design requirement it is ensured that foundation pit supporting system meets safety.

In order to realize foregoing invention purpose, the present invention employs the following technical solutions:

A kind of construction method improving soil nail wall anti-pulling capacity, is carried out in the steps below:

(1) carry out pore-forming with rig to designing hole depth;

(2) soil nailing muscle body is formed by the constraint of one or more high tensile reinforcement, arrange at soil nailing muscle body side slope slip-crack surface rear portion high-strength Degree soil engineering bag;High intensity soil engineering bag two ends fasten and arrange ring flange;Grouting Pipe directly extends bottom by end flange disk mesopore Portion, and in Grouting Pipe, one one-way cock is installed;High intensity soil engineering bag is sealingly fastened in soil nailing muscle by flexible wires expanding material On body, Grouting Pipe and bag space outerpace once grouting pipe and secondary grouting pipe in bag are laid on soil nailing muscle body;

(3) in the high intensity soil engineering bag soil nailing muscle body insertion soil nailing hole made, by Grouting Pipe in bag to high intensity soil engineering bag Carry out slip casting;After filling slurry, then by the outer once grouting pipe of bag to the outside slip casting of high intensity soil engineering bag, till filling, treat After once grouting slurry intensity reaches prescribed strength, then secondary grouting is carried out by secondary grouting pipe.

Using the present invention of technique scheme, compared with prior art, its advantage is:

By increasing soil nailing muscle body and cement mortar bond stress and side slope slip-crack surface rear portion soil nailing muscle body anchoring section surface area and section Amass and improve its frictional resistance and end resistance to improve pulling capacity of soil nail bearing capacity it is ensured that foundation pit supporting system meets the requirement of safety.

Preferably, the present invention further technical scheme is:

The high intensity soil engineering bag of soil nailing muscle body side slope slip-crack surface rear portion setting is one or more.

The flange part at high intensity soil engineering bag two ends is provided with for stopping the extruding anchor that ring flange slips.

High intensity soil engineering bag two ends rustless steel buckle fastens.

Brief description

Fig. 1 is the high intensity soil engineering bag slip casting soil nailing wall structure schematic diagram of the present invention;

Fig. 2 is two high intensity soil engineering bag slip casting soil nailing wall structure schematic diagrams;

In figure: 1, soil nailing muscle body;2nd, once grouting pipe;3rd, secondary grouting pipe;4th, one-way cock;5th, rustless steel buckle;6th, flange Disk;7th, high intensity soil engineering bag;8th, Grouting Pipe in bag;9th, muscle body is to medium-height trestle;10th, extruding anchor;11st, high intensity soil engineering bag slip casting anchor Solid.

Specific embodiment

Below in conjunction with drawings and Examples in detail the present invention is described in detail, but the present embodiment does not constitute any restriction to the present invention.

Referring to Fig. 1, Fig. 2, a kind of construction method of raising soil nail wall anti-pulling capacity, carry out in the steps below:

The first step: pore-forming is carried out to designing hole depth using rig.

Second step: muscle system is made: soil-nailed structure muscle body is formed by the constraint of one or more high tensile reinforcement, in soil nailing muscle body 1 Side slope slip-crack surface rear portion arranges one or more high intensity soil engineering bags 7;High intensity soil engineering bag 7 two ends are pricked using rustless steel buckle 5 Jail, high intensity soil engineering bag 7 two ends arrange ring flange 6, stop the slippage of ring flange using extruding anchor 10, and Grouting Pipe passes through end method Blue disk 6 mesopore directly extends bottom, and installs an one-way cock 4 in Grouting Pipe, prevents the excessive of serosity;High intensity soil engineering bag 7 pass through, on flexible line expanding material (meeting water to expand) the fixing soil nailing muscle body 1 of sealing, muscle body 1 to be laid Grouting Pipe 8 He in bag Bag space outerpace carries out once grouting pipe 2 and the secondary grouting pipe 3 of slip casting, and once grouting pipe 2 is used for outside high intensity soil engineering bag 7 Portion space carries out slip casting, and secondary grouting pipe 3 is used for carrying out secondary high-pressure slip-casting within 7 weeks to high intensity soil engineering bag.

3rd step: the high intensity made soil engineering bag soil nailing muscle body is inserted in soil nailing hole, by Grouting Pipe in bag 8 to height Intensity soil engineering bag 7 carries out slip casting;After filling slurry, then pass through bag once grouting pipe 2 slip casting to the outside of high intensity soil engineering bag 7 outward, directly To filling, reach after prescribed strength to once grouting slurry concretion body strength, then secondary injection is carried out by secondary grouting pipe 3 Slurry.

The foregoing is only the preferably feasible embodiment of the present invention, not thereby limit to the interest field of the present invention, The equivalent structure change that all utilization description of the invention and accompanying drawing content are made, is both contained within the interest field of the present invention.

Claims (4)

1. a kind of construction method improving soil nail wall anti-pulling capacity is it is characterised in that carry out in the steps below:
(1) carry out pore-forming with rig to designing hole depth;
(2) soil nailing muscle body is formed by the constraint of one or more high tensile reinforcement, arrange at soil nailing muscle body side slope slip-crack surface rear portion high-strength Degree soil engineering bag;High intensity soil engineering bag two ends fasten and arrange ring flange;Grouting Pipe directly extends bottom by end flange disk mesopore Portion, and in Grouting Pipe, one one-way cock is installed;High intensity soil engineering bag is sealingly fastened in soil nailing muscle by flexible wires expanding material On body, Grouting Pipe and bag space outerpace once grouting pipe and secondary grouting pipe in bag are laid on soil nailing muscle body;
(3) in the high intensity soil engineering bag soil nailing muscle body insertion soil nailing hole made, by Grouting Pipe in bag to high intensity soil engineering bag Carry out slip casting;After filling slurry, then by the outer once grouting pipe of bag to the outside slip casting of high intensity soil engineering bag, till filling, treat After once grouting slurry intensity reaches prescribed strength, then secondary grouting is carried out by secondary grouting pipe.
2. the construction method improving soil nail wall anti-pulling capacity according to claim 1 is it is characterised in that soil nailing muscle body side The high intensity soil engineering bag of hill wash broken face rear portion setting is one or more.
3. the construction method improving soil nail wall anti-pulling capacity according to claim 1 is it is characterised in that high intensity is geotechnological The flange part at bag two ends is provided with for stopping the extruding anchor that ring flange slips.
4. the construction method improving soil nail wall anti-pulling capacity according to claim 1 is it is characterised in that high intensity is geotechnological Bag two ends rustless steel buckle fastens.
CN201610732647.2A 2016-08-27 2016-08-27 Construction method for increasing uplift bearing capacity of soil nailing walls CN106351231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610732647.2A CN106351231A (en) 2016-08-27 2016-08-27 Construction method for increasing uplift bearing capacity of soil nailing walls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610732647.2A CN106351231A (en) 2016-08-27 2016-08-27 Construction method for increasing uplift bearing capacity of soil nailing walls

Publications (1)

Publication Number Publication Date
CN106351231A true CN106351231A (en) 2017-01-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610732647.2A CN106351231A (en) 2016-08-27 2016-08-27 Construction method for increasing uplift bearing capacity of soil nailing walls

Country Status (1)

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CN (1) CN106351231A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT315752B (en) * 1970-01-30 1974-06-10 Stump Bohr Ag A method for producing a tension anchor, especially for anchoring components
CN201013018Y (en) * 2007-01-19 2008-01-30 厉瑞祥 Injection anchor bar of plasm capsule bag
CN101929163A (en) * 2009-12-17 2010-12-29 浙江中联建设集团有限公司 Support construction process of lotus root-shaped segmental expanded soil anchor rod
CN103726498A (en) * 2014-01-21 2014-04-16 山东正元建设工程有限责任公司 Grouting expanding pre-stressed anchor rod of fiber bag and using method thereof
CN104074190A (en) * 2014-06-16 2014-10-01 成都四海岩土工程有限公司 Secondary high-pressure grouting expansion bit anchor rod and construction method thereof
CN104831734A (en) * 2015-04-24 2015-08-12 正坚建设有限公司 Construction method of jet-grouting pile and composite soil-nailed wall support for deep foundation pit construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT315752B (en) * 1970-01-30 1974-06-10 Stump Bohr Ag A method for producing a tension anchor, especially for anchoring components
CN201013018Y (en) * 2007-01-19 2008-01-30 厉瑞祥 Injection anchor bar of plasm capsule bag
CN101929163A (en) * 2009-12-17 2010-12-29 浙江中联建设集团有限公司 Support construction process of lotus root-shaped segmental expanded soil anchor rod
CN103726498A (en) * 2014-01-21 2014-04-16 山东正元建设工程有限责任公司 Grouting expanding pre-stressed anchor rod of fiber bag and using method thereof
CN104074190A (en) * 2014-06-16 2014-10-01 成都四海岩土工程有限公司 Secondary high-pressure grouting expansion bit anchor rod and construction method thereof
CN104831734A (en) * 2015-04-24 2015-08-12 正坚建设有限公司 Construction method of jet-grouting pile and composite soil-nailed wall support for deep foundation pit construction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
朱永: "《复合土钉墙在软土地基中的应用及监理质量控制要点》", 《科技资讯》 *

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Application publication date: 20170125