CN104389254A - Rockfill embankment sinking disease treatment construction method - Google Patents
Rockfill embankment sinking disease treatment construction method Download PDFInfo
- Publication number
- CN104389254A CN104389254A CN201410666680.0A CN201410666680A CN104389254A CN 104389254 A CN104389254 A CN 104389254A CN 201410666680 A CN201410666680 A CN 201410666680A CN 104389254 A CN104389254 A CN 104389254A
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- China
- Prior art keywords
- grouting
- sleeve valve
- holes
- valve barrel
- jet grouting
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Abstract
The invention discloses a rockfill embankment sinking disease treatment construction method which comprises the following steps: surveying and setting out a construction area, arranging pile positions of high-pressure jet grouting holes and sleeve valve barrel grouting holes at intervals, forming the holes of the pile positions of the high-pressure jet grouting holes and the sleeve valve barrel grouting holes till designed depth by using a drilling machine, after the holes are drilled, inserting jet grouting tubes into the high-pressure jet grouting holes, inserting sleeve valve tubes into the sleeve valve barrel grouting holes, drilling the jet grouting tubes till preset depths by using a jet grouting rotating rod with a nozzle device, starting a high-pressure pump, performing jet construction operation from the bottoms of the holes from bottom to top, lifting while jetting out grout by the jet grouting rotating rod till the designed elevation, and performing sectional grouting on the sleeve valve tubes, wherein the length of a floral tube is the grouting step length. The rockfill embankment sinking disease treatment construction method is simple, convenient and rapid in construction, the labor and the time are saved, the embankment quality is improved, and the engineering cost is lowered.
Description
Technical field
The present invention relates to road construction method, be specifically related to operation highway foundation Disease Processing construction method.
Background technology
Stone Filled Embankment refers to and is greater than 40mm with particle diameter and content exceedes the embankment of the gravel embankment of gross mass 70%.Stone Filled Embankment depression is a kind of disease through normal appearance after subgrade construction Qi He highway builds up, and when local settling amount is larger, easily occurs destabilization of roadbed, the phenomenons such as pavement depression, and then affects highway.
Because Stone Filled Embankment filling material is building stones, consolidation by grouting technology is the common methods of process Stone Filled Embankment operation highway foundation depression, and method conventional at present mainly contains high pressure jet grouting and slurry injection technique of sleeve valve tube.
High pressure jet grouting technology is risen in nineteen seventies, and eight, the nineties obtains development in an all-round way and application in the whole nation.Facts have proved that this method is moulded process mud, mucky soil, cohesive soil, stream, softly to mould or plastic cohesive soil, silt, sand, loess, plain fill and gravelly soil etc. have good effect, China has been listed in existing " groundsill and foundation job specfication ".
High pressure jet grouting method is a design altitude at the bottom of utilizing rig rotary jet grouting pipe and shower nozzle to be bored to be placed in, after making liquid stream obtain huge energy by high-voltage generator in the slurries prepared in advance, eject from the nozzle high speed of slip casting tube edge, form the liquid stream that one energy height is concentrated, the direct destruction soil body, in course of injection, rotation limit, drilling rod limit promotes, by impacting cutting and strong disturbance, slurries are spread within the scope of jet action, soil layer around filling, slurries and the soil body are fully uniformly mixed, the column induration of certain diameter is formed in soil, thus ground is reinforced.
High pressure jet grouting construction equipment compact conformation, volume are little, mobility strong, occupation of land are few, and the vibration of construction equipment is very little, noise is also lower, can not the impact of vibration be brought on Adjacent Buildings and produce the public hazards such as noise, it can be used for space smaller part, but have a large amount of mud to discharge in construction, useless slurry intractability is large, easily causes pollution.Roadbed secondary disease greatly, is easily caused to foundation soil disturbance.For the stratum that groundwater velocity is excessive, the Karst area ever frozen soil of non-filler and cement is had to the soil property of heavy corrosion, because the slurries sprayed at Grouting Pipe surrounding set, cannot should not adopt this method.
Sleeve valve barrel grouting method at present by the most reliable grouting method of generally acknowledging both at home and abroad, chunnel, English, method, day, meaning, and Taiwan, Hongkong Subway engineering all adopt this grouting method.The method successively in Shanghai, Guangzhou, Shenzhen Metro, and to apply in other engineering, all achieve good slip casting effect.Sleeve valve barrel grouting is that adopt segmenting slip casting technique, make slurries enter stratum more equably under stress, segmentation is controlled in the earth formation, evenly spreads by sleeve valve type Grouting Pipe by boring insert into stratum.
Sleeve valve barrel grouting method is generally applicable to the surface grouting within 50m, needs to adopt large-scale drilling machine to carry out pore-forming; There are upper and lower 2 grouting systems, carry out slip casting in arbitrary segment limit that slurries can be limited to slip casting region, reach the object of segmenting slip casting; Grouting system can move freely in smooth mini-valve tube, can a certain section of repeatedly slip-casting in slip casting region as required; According to stratum characteristic, different injecting paste materials can be adopted in 1 Grouting Pipe, select different grouting parameters to carry out mortar depositing construction.
The process characteristic of slurry injection technique of sleeve valve tube:
Construction machinery lighter simple and direct, work plane is little, construction disturbance is less, be easy to large-area construction, strong adaptability, bearing capacity of foundation soil significantly improve, construction quality easily ensures, efficiency of construction is high, save material and environmental protection, road pavement are polluted little.But also have that complicated construction technique, slip casting tubing price are higher, easily occur the phenomenon such as grout leaking, card pipe in slip casting process, overall cost is higher than high-pressure rotary jet grouting pile.
High pressure jet grouting and sleeve valve barrel grouting are generally apply in Stone Filled Embankment Disease Processing as single processing scheme, two kinds of technique mutual pluses and minuses, and high pressure jet grouting is cheap, but easily cause pollution time in construction.High-pressure injection causes super interstitial hydraulic pressure greatly, easily to cause roadbed secondary disease to foundation soil disturbance.Sleeve valve barrel grouting construction disturbance is little, and construction quality easily ensures, but complicated construction technique, and cost is high.
Summary of the invention
For solving the technical problem of Stone Filled Embankment depression Disease Processing, the invention provides a kind of convenient and quick construction, foundation quality can be improved, reduce engineering cost, the knockdown construction method little to ambient influnence.
The technical scheme realizing the object of the invention is: a kind of Stone Filled Embankment depression Disease Processing construction method, comprises the following steps:
Step 1 pair construction area carries out surveying setting-out, and high pressure jet grouting hole and stake position, sleeve valve barrel grouting hole are laid in interval;
Step 2 pair high pressure jet grouting hole and stake position, sleeve valve barrel grouting hole with rig pore-creating to projected depth;
After step 3 has been holed, in high pressure jet grouting hole, insert jet groutinl pipe, in sleeve valve barrel grouting hole, insert mini-valve tube;
After the effective churning bull stick with ejecting device of step 4 pair jet groutinl is drilled into desired depth, starts high-pressure pump, at the bottom of hole, from bottom to top carry out sprayed construction operation, spray limit, churning drilling rod limit promotes, till design elevation;
Step 5 pair mini-valve tube carries out segmented slip casting, and floral tube length is slip casting step pitch length.Slip casting step pitch generally chooses 0.6 ~ 1 m, effectively can reduce the impact of stratum inhomogeneity on slip casting effect like this.For layer of sand, slip casting step pitch should select low value; For sandy gravel or broken rock, slip casting step pitch should select high level.
As a further improvement on the present invention, described step 1 comprises further, in structure vicinity to lay sleeve valve barrel grouting hole, avoids the disturbance to roadbed and structure.
beneficial effect
(1) the present invention adopts high pressure jet grouting and sleeve valve barrel grouting combined method process Stone Filled Embankment depression disease, its main points make full use of high pressure jet grouting and mini-valve tube note two kinds of method features, by combinationally using, optimized construction procedure, more reasonably process operation highway foundation depression disease problem.The method is fast easy, saving of work and time, improves roadbed quality, reduces engineering cost.
(2) this combined method is compared with conventional high-pressure rotary churning pile method, because high-pressure rotary jet grouting pile pile spacing increases, and the super interstitial hydraulic pressure that the sleeve valve barrel grouting hole of laying between stake is conducive to high-pressure rotary-spray generation dissipates in time, avoid the disturbance to roadbed and structure, reduce the possibility of construction to the harm of road secondary, compare sleeve valve barrel grouting stake simultaneously and again reduce comprehensive cost.
(3) this invention mainly optimum organization on plane is laid and adjustment on working procedure to high pressure jet grouting and sleeve valve barrel grouting technique, in this, as innovative point, the detail content of high pressure jet grouting and sleeve valve barrel grouting working procedure with reference to Normal practice, can not done in this invention and describes one by one.
Accompanying drawing explanation
fig. 1for the embodiment of the present invention 1 bit plane lays schematic diagram;
fig. 2for the embodiment of the present invention 1 Stone Filled Embankment depression Disease Processing construction method flow chart.
Detailed description of the invention
Be described further below in conjunction with drawings and Examples.
Embodiment 1
As shown in Figure 2, a kind of Stone Filled Embankment depression Disease Processing construction method, comprises the following steps:
Step 1. surveying setting-out, determining hole position
Surveying setting-out is carried out to construction area, carries out high-pressure rotary jet grouting pile and the laying of sleeve valve barrel grouting stake position accurately by designing requirement.During the design of stake position, high pressure jet grouting hole 1 and interval, sleeve valve barrel grouting hole 2 are laid, and are advisable to lay sleeve valve barrel grouting hole 2 in structure 3 vicinity, and stake bit plane lays signal as shown in Figure 1.
The pore-creating of step 2. rig
Rig is marched into the arena and is placed on the stake position of laying, does level correction, and drilling rod head align piles position, holes to projected depth after driller insertion.
Step 3. intubate
After having holed, in high pressure jet grouting hole 1, insert jet groutinl pipe, in sleeve valve barrel grouting hole 2, insert mini-valve tube.
Step 4. high pressure jet grouting pile
To jet groutinl pipe, after being drilled into desired depth with the churning bull stick with ejecting device, start high-pressure pump, normal and after reaching designing requirement until pump amount pump pressure, from bottom to top sprayed construction operation is carried out at the bottom of hole, spray limit, churning drilling rod limit promotes, and till design elevation, sleeve valve barrel grouting hole can be utilized during high pressure jet grouting to reduce super interstitial hydraulic pressure.
Step 5. sleeve valve barrel grouting pile
Sleeve valve barrel grouting takes segmented slip casting, and every section of slip casting length is called slip casting step pitch.Floral tube length is slip casting step pitch length.
The invention is intended to by high pressure jet grouting and slurry injection technique of sleeve valve tube are combinationally used, on the basis of high pressure jet grouting, with sleeve valve barrel grouting stake Substitute For Partial high-pressure rotary jet grouting pile, the pile spacing of high pressure jet grouting stake is increased with this, and due to the precedence relationship on working procedure, sleeve valve barrel grouting hole can be utilized to discharge the super interstitial hydraulic pressure of high pressure jet grouting generation, near structure, lay sleeve valve barrel grouting simultaneously, reduce high pressure jet grouting greatly, easily causes roadbed secondary disease problem to foundation soil disturbance further.This combined method compares single sleeve valve barrel grouting technique, and cost reduces.Compare single high pressure jet grouting technique, can environment pollution be reduced, reduce the disturbance to roadbed.
Claims (3)
1. a Stone Filled Embankment depression Disease Processing construction method, it is characterized in that, the method comprises the following steps:
Step 1 pair construction area carries out surveying setting-out, and high pressure jet grouting hole and stake position, sleeve valve barrel grouting hole are laid in interval;
Step 2 pair high pressure jet grouting hole and stake position, sleeve valve barrel grouting hole with rig pore-creating to projected depth;
After step 3 has been holed, in high pressure jet grouting hole, insert jet groutinl pipe, in sleeve valve barrel grouting hole, insert mini-valve tube;
After the effective churning bull stick with ejecting device of step 4 pair jet groutinl is drilled into desired depth, starts high-pressure pump, at the bottom of hole, from bottom to top carry out sprayed construction operation, spray limit, churning drilling rod limit promotes, till design elevation;
Step 5 pair mini-valve tube carries out segmented slip casting, and floral tube length is slip casting step pitch length.
2. Stone Filled Embankment depression Disease Processing construction method according to claim 1, it is characterized in that, described step 1 comprises further, in structure vicinity to lay sleeve valve barrel grouting hole.
3. Stone Filled Embankment depression Disease Processing construction method according to claim 1, it is characterized in that, in described step 5, slip casting step pitch chooses 0.6m ~ 1 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410666680.0A CN104389254A (en) | 2014-11-20 | 2014-11-20 | Rockfill embankment sinking disease treatment construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410666680.0A CN104389254A (en) | 2014-11-20 | 2014-11-20 | Rockfill embankment sinking disease treatment construction method |
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| CN104389254A true CN104389254A (en) | 2015-03-04 |
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| CN201410666680.0A Pending CN104389254A (en) | 2014-11-20 | 2014-11-20 | Rockfill embankment sinking disease treatment construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151972A (en) * | 2017-06-19 | 2017-09-12 | 杭州江润科技有限公司 | Embankment deep layer disease no-dig technique Comprehensive Treatment construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115014A (en) * | 1990-09-03 | 1992-04-15 | Penta Ocean Constr Co Ltd | Method of improving foundation by filling hardener by use of high pressure jet water |
| CN102864712A (en) * | 2012-10-16 | 2013-01-09 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN103437340A (en) * | 2013-08-21 | 2013-12-11 | 国家电网公司 | Method for strengthening soft foundation through high-pressure jet grouting |
| CN103603251A (en) * | 2013-11-26 | 2014-02-26 | 中铁西北科学研究院有限公司 | Method for reinforcing railroad bed of salt lake by using saturated brine clay slurry |
| CN103741568A (en) * | 2013-12-25 | 2014-04-23 | 广西科技大学 | High-fill settling subgrade grouting process |
| CN103806479A (en) * | 2014-01-27 | 2014-05-21 | 广东省建筑科学研究院 | Pile foundation combined grouting reinforcement construction method combining waterproof curtain |
-
2014
- 2014-11-20 CN CN201410666680.0A patent/CN104389254A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115014A (en) * | 1990-09-03 | 1992-04-15 | Penta Ocean Constr Co Ltd | Method of improving foundation by filling hardener by use of high pressure jet water |
| CN102864712A (en) * | 2012-10-16 | 2013-01-09 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN103437340A (en) * | 2013-08-21 | 2013-12-11 | 国家电网公司 | Method for strengthening soft foundation through high-pressure jet grouting |
| CN103603251A (en) * | 2013-11-26 | 2014-02-26 | 中铁西北科学研究院有限公司 | Method for reinforcing railroad bed of salt lake by using saturated brine clay slurry |
| CN103741568A (en) * | 2013-12-25 | 2014-04-23 | 广西科技大学 | High-fill settling subgrade grouting process |
| CN103806479A (en) * | 2014-01-27 | 2014-05-21 | 广东省建筑科学研究院 | Pile foundation combined grouting reinforcement construction method combining waterproof curtain |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151972A (en) * | 2017-06-19 | 2017-09-12 | 杭州江润科技有限公司 | Embankment deep layer disease no-dig technique Comprehensive Treatment construction method |
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Application publication date: 20150304 |