CN102644266A - Method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas - Google Patents

Method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas Download PDF

Info

Publication number
CN102644266A
CN102644266A CN2012101323650A CN201210132365A CN102644266A CN 102644266 A CN102644266 A CN 102644266A CN 2012101323650 A CN2012101323650 A CN 2012101323650A CN 201210132365 A CN201210132365 A CN 201210132365A CN 102644266 A CN102644266 A CN 102644266A
Authority
CN
China
Prior art keywords
tube
anchor pole
splitting
bolthole
splitting anchor
Prior art date
Application number
CN2012101323650A
Other languages
Chinese (zh)
Other versions
CN102644266B (en
Inventor
潘金龙
Original Assignee
杭州岩土工程有限公司
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 杭州岩土工程有限公司 filed Critical 杭州岩土工程有限公司
Priority to CN201210132365.0A priority Critical patent/CN102644266B/en
Publication of CN102644266A publication Critical patent/CN102644266A/en
Application granted granted Critical
Publication of CN102644266B publication Critical patent/CN102644266B/en

Links

Abstract

The invention relates to a method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas. The technical problem to be solved is that the provided method should be capable of effectively eliminating abutment vehicle jolting phenomenon of soft soil foundation pavement, the construction method is simple and the construction cost is low. The technical scheme includes the steps that a plurality of anchor rod holes are drilled at space of 1.5 to 2.5 meters x 1.5 to 2.5 meters in a range of 10 to 30 meters along the pavement at the juncture of bridge and road, and the anchor rod holes phi are 100+/- 10 millimeters; and the depths of the anchor rod holes are 1 to 3 meters into bearing stratum after penetrating through the soft soil stratum, or the depths of the anchor rod holes are >= 20 meters; fracture anchor rods with suitable lengths are placed in the anchor rod holes; gaps between outer pipe tops and inner pipes are sealed by utilizing hole plugs; cement paste is injected into the outer pipes of the fracture anchor rods; paste is injected into the inner pipes of the fracture anchor rods; and the pavement is repaired.

Description

A kind of method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone

Technical field

The present invention relates to a kind of construction techniques, especially carry out the method for pavement construction in the soft foundation zone.

Background technology

Southeastern coast, particularly Jiangsu and Zhejiang Provinces one band soft foundation is more; Weak soil layer general thickness is big, and bearing capacity is poor, produces bigger variation through regular meeting owing to the weak soil sedimentation causes road height, and especially drop is bigger on the road surface on abutment limit, and then abutment jumping car phenomenon occurs, forms the hidden danger of traffic accident.And, still there is not good especially improvement method at present.

Summary of the invention

Technical problem to be solved by this invention is the deficiency that overcomes above-mentioned prior art, and a kind of method of reinforcing the abutment soft foundation is provided, and this method should be able to effectively be eliminated the abutment on soft foundation road surface and jump the car phenomenon, and job practices is simple, construction cost is not high.

Technical scheme provided by the invention is:

A kind of method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone, carry out according to following steps:

1, along in the 10-30m scope of bridge circuit intersection road surface, presses the spacing of 1.5-2.5m * 1.5-2.5m and bore a plurality of boltholes of system, bolthole Ф 100 ± 10 mm; The bolthole degree of depth gets into bearing stratum 1-3m, perhaps the bolthole degree of depth >=20m for passing through the weak soil layer;

2, in bolthole, put into the matched splitting anchor pole of length; This splitting anchor pole comprises the interior pipe and the outer tube of inside and outside socket, and last following of interior pipe all stretches out certain length the mouth of pipe at two ends about outer tube; Also be shaped on the slurry outlet that several penetrate tube wall respectively on interior pipe and the outer tube;

3, the gap between employing stopple sealing outer tube top and the interior pipe;

4, in the outer tube of splitting anchor pole, inject cement paste; Grouting pressure is 2-6kg/cm 2, form a cement paste diffuser K so that be positioned at the splitting anchor pole bottom part of bearing stratum;

5, slip casting in the interior pipe of splitting anchor pole, grouting pressure pressure are more than 2 times of outer tube grouting pressure, form a splitting body P so that inject weak soil the slurry outlet of slurry from splitting anchor pole outer circumference surface;

6, repair on the road surface.

After said splitting anchor pole is put into bolthole, put on the top of outer tube again one be used for slip casting short tube, the bottom of this short tube feeds outer tube bore.

Said stopple is the concrete block that solidifies.

Said slurry outlet is staggered on the tube wall of interior pipe and outer tube.

The top of said bolthole need dispose one pass through stopple stack.

Operating principle of the present invention is: a cement paste block has been formed in a plurality of splitting anchor pole stakes that are arranged in the weak soil layer, is similar to piece stone bed course; Therefore significantly increased the support force of this position ground road pavement; And the weight of cement paste block can not cause new load to roadbed through bearing stratum (generally being lithosphere) digestion.

The invention has the beneficial effects as follows: because the method that provided has significantly strengthened the support degree of soft foundation, so the roadbed subsidence phenomenon in abutment zone obtained the elimination of essence, and the abutment that has also just solved conventional highway is fully jumped the car phenomenon; And the present invention can utilize existing equipment fully, do not increase construction difficulty, thereby can generally promote the use of.

 

Description of drawings

Fig. 1 is the main TV structure sketch map of the splitting anchor pole among the present invention.

Fig. 2 is the use principle sketch map of the splitting anchor pole among the present invention.

Fig. 3 is the road structure sketch map in abutment zone.

Fig. 4 is that A-A among Fig. 3 is to structural representation.

The specific embodiment

Further specify below in conjunction with embodiment shown in the drawings.

The method on weak soil layer road surface, abutment zone is reinforced in employing splitting anchor pole stake provided by the invention, carries out according to following steps:

1, along in the bridge circuit intersection 10-30m scope (like Fig. 3, shown in Figure 4), toward a plurality of boltholes 7 of underground vertical brill system, the distance of space 1.5-2.5m between the bolthole, bolthole aperture Ф 100 ± 10 mm; The bolthole degree of depth is generally passes through weak soil layer entering bearing stratum 1-3m; When the coastal area bolthole degree of depth degree of depth is difficult for arriving bearing stratum, the bolthole degree of depth >=20m.

2, in bolthole, put into the matched splitting anchor pole of length; This splitting anchor pole comprises the interior pipe 1 and outer tube 2 of inside and outside socket, the going up following and all stretch out certain length (being generally 50-100cm gets final product) the mouth of pipe at two ends up and down of interior pipe from outer tube, and the external diameter of outer tube is usually less than the aperture (recommending little 5-10cm) of bolthole; Also be shaped on several slurry outlets that penetrate tube wall 8 respectively on interior pipe and the outer tube; These slurry outlets are interspersed (claiming that again the plum blossom shape distributes) usually, and promptly the slurry outlet of the row of going up is in staggered distribution mutually with following row's slurry outlet; After said splitting anchor pole is put into bolthole, put on the top of outer tube again one be used for slip casting short tube 3, the bottom of this short tube feeds the inner chamber of outer tube.

3, adopt gap between stopple 4 sealing outer tube tops and the interior pipe (while also fixedly short tube); Usually stopple adopts concrete pouring to form.

4, in the outer tube of splitting anchor pole, inject cement paste (comprise cement mortar, or cement lightweight mortar, or cement foam mortar); According to the soil layer situation, grouting pressure is 2-6kg/cm 2, form a cement paste diffuser K (as shown in Figure 2) so that be positioned at the splitting anchor pole bottom part of bearing stratum.For guaranteeing that cement paste injects bearing stratum, need treat that the concrete stopple solidifies and after maintenance 2-3 days, carry out the operation of this step again.In addition, when making stopple, place in advance one pass through stopple stack 6, when being beneficial to slip casting, the air in the bolthole can be discharged smoothly; And drain at air, when mortar is gushed out from stack, should adopt stopper (normally rubber stopper) to block stack, continue slip casting then.

5, in the interior pipe of splitting anchor pole, inject concrete mortar, grouting pressure is more than 2 times of outer tube grouting pressure, forms a splitting body P so that inject weak soil the slurry outlet of mortar from splitting anchor pole outer circumference surface;

6, adopt the conventional method redeck at last.

In addition, when mortar is filled with outer tube and interior pipe, use stopper (normally rubber stopper) and block outer tube and interior pipe, in case mortar overflows from the top of outer tube and interior pipe; One slip casting valve 5 (conventional components) also can be installed at the top of outer tube and interior pipe carry out shutoff.

Claims (5)

1. method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone, carry out according to following steps:
1) boring system a plurality of boltholes (7) along the spacing of pressing 1.5-2.5m * 1.5-2.5m in the 10-30m scope of bridge circuit intersection road surface, bolthole Ф 100 ± 10 mm, the bolthole degree of depth gets into bearing stratum 1-3m, perhaps the bolthole degree of depth >=20m for passing through the weak soil layer;
2) in bolthole, put into the matched splitting anchor pole of length; This splitting anchor pole comprises the interior pipe (1) and the outer tube (2) of inside and outside socket, and last following of interior pipe all stretches out certain length the mouth of pipe at two ends about outer tube; Also be shaped on several slurry outlets that penetrates tube wall (8) respectively on interior pipe and the outer tube;
3) gap between employing stopple (4) sealing outer tube top and the interior pipe;
4) cement injection in the outer tube of splitting anchor pole, grouting pressure is 2-6kg/cm 2, form a cement paste diffuser (K) so that be positioned at the splitting anchor pole bottom part of bearing stratum;
5) slip casting in the interior pipe of splitting anchor pole, grouting pressure pressure are more than 2 times of outer tube grouting pressure, form a splitting body (P) so that inject weak soil the perforate of slurry from splitting anchor pole outer circumference surface;
6) repair on the road surface.
2. a kind of method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone according to claim 1; After it is characterized in that said splitting anchor pole is put into bolthole; Put on the top of outer tube again one be used for slip casting short tube (3), the bottom of this short tube feeds outer tube bore.
3. a kind of method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone according to claim 1 and 2 is characterized in that said stopple is the concrete block that solidifies.
4. a kind of method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone according to claim 3 is characterized in that said slurry outlet is staggered on the tube wall of interior pipe and outer tube.
5. a kind of method that adopts the stake of splitting anchor pole to reinforce weak soil layer road surface, abutment zone according to claim 4, the top that it is characterized in that said bolthole need dispose one pass through stopple stack (6).
CN201210132365.0A 2012-05-02 2012-05-02 Method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas CN102644266B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210132365.0A CN102644266B (en) 2012-05-02 2012-05-02 Method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210132365.0A CN102644266B (en) 2012-05-02 2012-05-02 Method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas

Publications (2)

Publication Number Publication Date
CN102644266A true CN102644266A (en) 2012-08-22
CN102644266B CN102644266B (en) 2014-03-19

Family

ID=46657329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210132365.0A CN102644266B (en) 2012-05-02 2012-05-02 Method utilizing fracture anchor rod piles for reinforcing soft soil stratum pavements in abutment areas

Country Status (1)

Country Link
CN (1) CN102644266B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103195060A (en) * 2013-04-01 2013-07-10 山东科技大学 Soft foundation pre-stressed anchor rod reinforced structure and use thereof
CN106192989A (en) * 2016-08-30 2016-12-07 江苏中路工程技术研究院有限公司 A kind of ductule and soft base processing method
CN106498941A (en) * 2016-12-09 2017-03-15 绍兴明煌建材科技有限公司 A kind of pile foundation of light section steel structure bridge and its construction method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100707492B1 (en) * 2005-05-09 2007-04-13 김진춘 A grout carrying out mehtod for Paste Backfill Grouting at the Cave
CN101275393A (en) * 2007-03-27 2008-10-01 上海华海特殊环境工程有限公司 Method for controlling running sand in underground engineering and grouting system therefor
CN102182180A (en) * 2011-04-01 2011-09-14 威海建设集团股份有限公司 Rotary extrusion sleeve anchor rod and construction method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100707492B1 (en) * 2005-05-09 2007-04-13 김진춘 A grout carrying out mehtod for Paste Backfill Grouting at the Cave
CN101275393A (en) * 2007-03-27 2008-10-01 上海华海特殊环境工程有限公司 Method for controlling running sand in underground engineering and grouting system therefor
CN102182180A (en) * 2011-04-01 2011-09-14 威海建设集团股份有限公司 Rotary extrusion sleeve anchor rod and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103195060A (en) * 2013-04-01 2013-07-10 山东科技大学 Soft foundation pre-stressed anchor rod reinforced structure and use thereof
CN106192989A (en) * 2016-08-30 2016-12-07 江苏中路工程技术研究院有限公司 A kind of ductule and soft base processing method
CN106498941A (en) * 2016-12-09 2017-03-15 绍兴明煌建材科技有限公司 A kind of pile foundation of light section steel structure bridge and its construction method

Also Published As

Publication number Publication date
CN102644266B (en) 2014-03-19

Similar Documents

Publication Publication Date Title
CN101886382B (en) Soft foundation reinforcing method of existing railway or highway subgrade construction
CN103556579B (en) A kind of comprehensive grouting pressurize adds the box culvert pushing construction method of pipe curtain supporting
CN104080977B (en) The connected structure of steel bridge pier and concrete pile foundation
CN103410161B (en) Oblique control slip casting steel anchor tube framework and construction method thereof
CN102277898B (en) Drain pipe jacking construction method
KR101022382B1 (en) Precast horizontality tubular roof and tunnel construction method using the same
CN103321653B (en) Method of treating lining after collapse of underground cavern crown
CN101838998B (en) Prestressed anchor cable pile sliding wall along river road shoulder and construction method thereof
CN101270582B (en) Method for setting bracing column in underground cavity
CN104746501B (en) Treatment method and structure of bridge-head foundation sliding settlement
CN101666081B (en) Abrupt slope bare rock drilling platform and technology in huge reservoir
CN103526770B (en) A kind of construction method of high antiseepage anti-floating pile raft structure
CN203174453U (en) Light-mass embankment structure for managing bump at bridge head
CN103276639B (en) Roadbed structure for deep soft soil region
CN204401447U (en) A kind of structure preventing bumping at bridge-head
CN201671108U (en) Riverside shoulder prestressing anchor cable sheet-pile wall
CN104790424B (en) The hardened system on generation power foundation of wind power ring basis and reinforcement means thereof
CN103074891A (en) Double-layer plastic sleeve bulk material and concrete stiffness core composite pile and construction method thereof
CN102071607B (en) Railroad bed repair method without affecting existing running conditions
CN109372556B (en) Sandwich arch suitable for high-stress soft rock tunnel surrounding rock support and construction method
CN106522037B (en) Side broad way based structures based on existing railway roadbed and its construction method
CN201962558U (en) High-steepness side slope subgrade structure for mountainous area
CN204000901U (en) The vertical high slope prestressing anchor support of a kind of massif device
CN203755334U (en) Single-pipe tower prefabricated spiral steel pipe pile foundation
CN103088819A (en) Pre-stressed anchor cable construction method

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information

Address after: 310014, Hangzhou, Zhejiang province Xihu District transferred to the streets of Liuzhou Wu Long Industrial Park

Applicant after: GEOTECHNICAL TECHNOLOGY CO., LTD.

Address before: 310014, Hangzhou, Zhejiang, Xihu District province Zhuan Tong Street, academy road, No. 99, long heart city building, 6 floor

Applicant before: Hangzhou Geotechnical Engineering Co., Ltd.

COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: HANGZHOU GEOTECHNICAL ENGINEERING CO., LTD. TO: GEOTECHNICAL TECHNOLOGY CO., LTD.

GR01 Patent grant