CN103233468A - Polymer gravel pile grouting method - Google Patents

Polymer gravel pile grouting method Download PDF

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Publication number
CN103233468A
CN103233468A CN2013101349176A CN201310134917A CN103233468A CN 103233468 A CN103233468 A CN 103233468A CN 2013101349176 A CN2013101349176 A CN 2013101349176A CN 201310134917 A CN201310134917 A CN 201310134917A CN 103233468 A CN103233468 A CN 103233468A
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CN
China
Prior art keywords
polymer
pile
grouting
hole
grouting pipe
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CN2013101349176A
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Chinese (zh)
Inventor
王复明
钟燕辉
石明生
张蓓
李晓龙
赵海洲
董亮
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河南博特工程防护有限公司
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Priority to CN2013101349176A priority Critical patent/CN103233468A/en
Publication of CN103233468A publication Critical patent/CN103233468A/en

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    • 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
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same

Abstract

The invention relates to a polymer gravel pile grouting method for reinforcement of soft foundation and special soil foundation. The polymer gravel pile grouting method includes the following specific implementation steps: (1) pile position hole-forming; (2) grouting pipe installation; (3) graded stone distribution; (4) grouting improvement of polymer; and (5) pile forming. Through the steps of pile position hole-forming, graded stone distribution, grouting improvement of polymer and the like at a reinforced field, after injected two-component swelling polymer materials have chemical reaction, volume of the polymer materials is swelled rapidly and solidified together with graded stone, pile holes are filled by the polymer materials from bottom to top, and the polymer materials swell to be compacted with hole wall rock soil to be combined with the peripheral rock soil fully so as to form a polymer gravel pile. The polymer gravel pile grouting method can achieve rapid reinforcement of soft foundation and special soil foundation, is advanced, efficient, safe and practical for reinforcement of the soft foundation and the special soil foundation, has the advantages of being strong in adaptability, high in strength, rapid, high in tenacity, durable and the like, and has huge economic and social benefits and wide development and application prospects.

Description

High polymer broken stone pile grouting method
Technical field
The invention belongs to the foundation treatment technology field, be specifically related to the high polymer broken stone pile grouting method that soft foundation and special soil base are reinforced.
Background technology
Since the nineties in last century, be accompanied by the steady and sound development of the development of the national economy, a fast-developing phase has been stepped in large foundation engineering services construction such as China's speedway, high-speed railway, has obtained remarkable achievement.Because China is vast in territory, geological conditions is complicated and changeable, and speedway, high-speed railway pass through unfavorable geology areas such as weak soil, collapsible loess in a large number, and the engineering geological problems that faces is very outstanding.Because weak soil has physical mechanics features such as water content is big, compressibilty is high, intensity is low, transmission coefficient is little, when building roadbed in this type of area, because the ground consolidation cycle is long, the settlement after construction deflection is big, have a strong impact on the long-time stability of roadbed.In Collapsible Loess District, natural loess foundation intensity can sharply reduce under the immersion situation, and produces significant additional settlement, and subgrade stability is constituted a serious threat.Therefore, how soft foundation and special soil base are effectively handled, can enough be satisfied engineering structures safety and the normal requirement of using, become the matter of utmost importance that must solve in the high-speed transportation facilities construction.
Over nearly 30 years, engineers and technicians have proposed tens of kinds of method for processing foundation, and have been widely used in the civil engineering construction in conjunction with China's engineering geological features.According to the difference of reinforcement mechanism, existing method for processing foundation can be divided into cushion, consolidation, chemical stabilization, reinforcement method and closely knit method 5 big classes generally.Cushion is by the excavating earth surface soft layer, and backfill hard coarse material and compacting improve the supporting capacity of ground, is applicable to that mainly handling the degree of depth is shallow-layer soft foundation and the inhomogeneous ground of 2 ~ 3m; Consolidation adopts modes such as preloading or vacuum preloading that the pore water in the soil body is discharged, and reaches to improve soil strength, partly or entirely eliminate the purpose of foundation settlement, and is inapplicable to the low water content foundation soil; Modes such as chemical stabilization adopts that perfusion is pressed into, high-pressure injection or mechanical agitation make cement or chemical grout and soil particle gluing, reach the purpose of improving the foundation soil physico-mechanical properties, the construction technology complexity, and contaminated environment, cost is higher; Reinforcement method as soil supporting layer, utilizes the rubbing action between muscle material and the soil body to improve soil body tension, shear behavior by the reinforcement cushion successively laying geosynthetics and sandstone etc. and form, is not suitable for and handles large-scale deep layer soft foundation; Closely knit method can be divided into two classes, a class be by roll, mode such as rammer reduces soil body void ratio by force, improves its supporting capacity, mainly is applicable to the processing shallow layer foundation; Another kind of is the composite foundation method, form the flexible pile body with higher-strength by soil compaction pore-forming, filling loose material, form compound ground with surrounding soil and bear upper load jointly, difference according to filler can be divided into sand pile, broken stone pile, cement earth pile etc., is applicable to inhomogeneity moldeed depth, shallow-layer treatment of soft ground.
In recent years, be used widely in speedway, high-speed railway soft foundation and special soil base are handled based on composite foundation reinforcing method compacted, that fill principle.Especially the broken stone pile method relies on advantages such as its materials economy, construction technology are simple relatively to be subjected to engineers and technicians' favor.
Existing gravel pile reinforcing technology adopts vibration sinking tube, hammer hidden pipe or impact holing method to form the stake hole usually, and the jolt ramming of rubble limit is inserted on the limit then, finally forms pile body.Because rubble pile body compressibilty is less than weak soil, the subsidiary stress that the basis passes to ground focuses on the pile body with the distortion of ground gradually, pile body produces lateral deformation compressing inter-pile soil simultaneously, stress is passed to inter-pile soil, interaction by both forms a composite force system, thereby reaches the purpose that improves bearing capacity of foundation soil and reduce sedimentation.
Although gravel pile reinforcing method advantage is outstanding, use extensively day by day, but for the demand of foundation treatment engineering, still exist some shortcomings, mainly show: (1) shakes and breaks through the die-cut system stake of Cheng Caiyong water under high pressure technology, is not suitable for the foundation treatment engineering higher to water sensitivity; (2) construction technology is comparatively complicated, and construction quality is wayward; (3) work progress is bigger to the ground disturbance, and produces a large amount of waste liquids, contaminated environment; (4) construction equipment is huge, and the energy consumption height is poor for applicability, the construction plant is required high; (5) vertical bearing capacity of broken stone pile and settling amount depend on surrounding soil to a great extent to the restraint forces of broken stone pile, and be just poor to the restriction ability of broken stone pile if surrounding soil is comparatively weak, the performance of restriction pile body vertical bearing capacity; (6) pile body is made up of granular material, has cohesion between material granule hardly, make the pile body horizontal bearing capacity a little less than, can cause composite foundation to be cut off because of the rubble pile body when in particular cases bearing horizontal loads and lose efficacy.
In sum, a large amount of ground that faces in China's traffic infrastructure process of construction is handled problems, how at the deficiency of existing foundation treatment technology, the research and development ground is handled new material, new technology and new equipment, for promoting China's foundation treatment technology level, ensure that traffic infrastructure construction quality and operation security are significant.
The high polymer grouting technology is the foundation rapid reinforcement technology that grows up the seventies in 20th century.This technology is by injecting high polymer material in ground, utilize the characteristic that volume expands and solidifies rapidly behind the high polymer material generation chemical reaction, reaches the purpose of filling pore, the compacted soil body.At present, the high polymer grouting technology is mainly used in ground stabilization and the road maintenance of industry and civilian construction, the domestic relevant report that yet there are no high polymer broken stone pile grouting method.
Summary of the invention
The objective of the invention is the deficiency at existing foundation treatment technology, when particularly running into collapsible loess or water-swellable soil layer water slurry injection technique incompatibility being arranged, proposed a kind of high polymer broken stone pile grouting method of quick, safe, high-strength, environmental protection.Utilize this invention can realize quick reinforcing to soft foundation and special soil base, reinforcing for soft foundation and special soil base provides advanced, efficient, safe, practical new method.
For achieving the above object, the technical scheme taked of the present invention is:
A kind of high polymer broken stone pile grouting method, concrete implementation step is as follows:
(1) stake position pore-forming: according to designing requirement, utilize drilling tool in construction stake hole, stake position, the degree of depth reaches projected depth;
(2) Grouting Pipe is installed: in the stake hole Grouting Pipe is installed, Grouting Pipe is positioned at a hole central authorities, and the Grouting Pipe grout outlet is bottom, stake hole deeply;
(3) throw in the grating building stones: according to different geological conditionss, in the stake hole, drop into the grating building stones;
(4) high polymer promotes slip casting: high polymer is promoted the top, hole that slip casting control equipment is placed into Grouting Pipe; Grouting Pipe is placed in the catheter anchoring system of high polymer lifting slip casting control equipment; Adopt the high polymer grouting system in the stake hole, to inject two component dilatancy high polymer materials by Grouting Pipe, open lifting slip casting control simultaneously and equip;
(5) pile: upwards promote Grouting Pipe by setting speed, rapidly expansion and be solidified togather with the grating building stones of volume behind two component dilatancy high polymer material generation chemical reactions of injection, fill up a hole from bottom to top, compacted hole wall ground expands, with the abundant combination of ground on every side, form the high polymer broken stone pile.
The present invention is according to the ground processing requirements, by being reinforced steps such as stake position, place pore-forming, input graded broken stone, high polymer lifting slip casting, make pile body and pile peripheral earth further closely knit, form thus with the pile peripheral earth of high polymer grouting broken stone pile, modification and the composite foundation of inter-pile soil formation.
Compare with traditional method for processing foundation, the present invention possesses following characteristics:
(1) the high polymer broken stone pile of this invention formation forms composite foundation with stake soil on every side, has the multiple mechanisms of action such as displacement, vertically enhancing, draining, exhaust, gluing, densification, filling;
(2) anhydrous response, applicability is strong.The anhydrous response high polymer material is drying shrinkage not, have stronger tensile property and antivibration cracking resistance, cubical expansivity is big, the pile body form is full, energy is the bored pile hole fully, be not only applicable to general ground environment, and be applicable to the reinforcing soft foundation of the unfavorable collapsible loess of cement-based material or water-swellable soil layer;
(3) intensity height.High polymer grouting material and the abundant combination of ground on every side, the root system shape cement structure of formation has extremely strong adhesion stress.Compare with the cement material under the square one, anchored force improves nearly 1 times;
(5) quick construction does not need health.Quick construction is worked continuously in boring, lifting slip casting.Material reacts the back intensity that namely formed about 90% in 15 minutes, does not need health;
(6) easy construction.High polymer grouting seriation equipment is adapted to different places, marches into the arena conveniently, and the power supply for construction amount is little;
(7) good endurance.The high polymer grouting material property is stable, and pollution-free, pliability is good, and with ground body close adhesion, compatible deformation, transmission coefficient is little, imbeds underground the have good corrosion of opposing chemical solvent and anti-permeability performance for a long time.
Therefore, the high polymer broken stone pile grouting method of the present invention's research and development has many advantages in the soft foundation reinstatement works.Compare with existing foundation treatment technology, high polymer broken stone pile grouting method is again a cover brand-new technology, mainly shows:
(1) aspect one-tenth pile material and pile theory: high polymer broken stone pile grouting method is from flexible pile theory, what adopt is anhydrous response family macromolecule polymer novel slurry filling material, has safety and environmental protection, lightweight is durable, expansion rate is high, impervious characteristics such as good, early strong.The high polymer broken stone pile that makes up is flexible body, and is closely glued with the soil body, compatibility of deformation, and impervious cracking resistance is good.
(2) aspect reinforcement mechanism: high polymer broken stone pile grouting method utilizes the reacted expansion force of high polymer material that the stake hole is filled and the compacted hole wall ground that expands, with the abundant combination of ground on every side, high polymer material is solidified togather building stones and surrounding soil formation composite foundation in expansion process, has realized the quick reinforcing to soft foundation.
(3) aspect form of construction work: by the mode pile of boring, input building stones, high polymer grouting, convenient and quick construction uses high polymer to promote slurry injection technique, has realized the fast and stable of soft foundation is reinforced.
In sum, the present invention still is that aspect such as form of construction work is all obviously different with existing method for processing foundation from becoming pile material, pile theory, reinforcement mechanism, have that applicability is strong, quick, high-ductility, advantage such as durable, have huge economical, societal benefits and wide development and application prospect.
Description of drawings
Fig. 1 is high polymer broken stone pile stake position pore-forming schematic diagram.
Fig. 2 is for to install Grouting Pipe in the stake hole.
Fig. 3 throws in the grating building stones in the stake hole.
Fig. 4 promotes the slip casting schematic diagram for high polymer.
Fig. 5 is high polymer broken stone pile sectional drawing.
Fig. 6 is high polymer broken stone pile vertical view.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of high polymer broken stone pile grouting method, concrete implementation step is as follows:
(1) stake position pore-forming: according to designing requirement, utilize drilling tool 1 in construction stake hole, stake position, the degree of depth reaches projected depth, as shown in Figure 1;
(2) Grouting Pipe is installed: Grouting Pipe 3 is installed in stake hole 2, and Grouting Pipe 3 is positioned at a hole central authorities, and Grouting Pipe 3 grout outlets are stake 2 bottoms, hole deeply, as shown in Figure 2;
(3) throw in the grating building stones: according to different geological conditionss, in the stake hole, drop into grating building stones 4, as shown in Figure 3;
(4) high polymer promotes slip casting: high polymer is promoted the top, hole that slip casting control equipment 5 is placed into Grouting Pipe 3; Grouting Pipe 3 is placed in the catheter anchoring system of high polymer lifting slip casting control equipment 5; Adopt the high polymer grouting system in the stake hole, to inject two component dilatancy high polymer materials 6 by Grouting Pipe, open lifting slip casting control simultaneously and equip 5, as shown in Figure 4;
(5) pile: upwards promote Grouting Pipe by setting speed, rapidly expansion and be solidified togather with the grating building stones of volume behind two component dilatancy high polymer material generation chemical reactions of injection, fill up a hole from bottom to top, compacted hole wall ground expands, with the abundant combination of ground on every side, form high polymer broken stone pile 7, as Fig. 5, shown in Figure 6.

Claims (1)

1. high polymer broken stone pile grouting method is characterized in that: concrete implementation step is as follows:
(1) stake position pore-forming: according to designing requirement, utilize drilling tool in construction stake hole, stake position, the degree of depth reaches projected depth;
(2) Grouting Pipe is installed: in the stake hole Grouting Pipe is installed, Grouting Pipe is positioned at a hole central authorities, and the Grouting Pipe grout outlet is bottom, stake hole deeply;
(3) throw in the grating building stones: according to different geological conditionss, in the stake hole, drop into the grating building stones;
(4) high polymer promotes slip casting: high polymer is promoted the top, hole that slip casting control equipment is placed into Grouting Pipe; Grouting Pipe is placed in the catheter anchoring system of high polymer lifting slip casting control equipment; Adopt the high polymer grouting system in the stake hole, to inject two component dilatancy high polymer materials by Grouting Pipe, open lifting slip casting control simultaneously and equip;
(5) pile: upwards promote Grouting Pipe by setting speed, rapidly expansion and be solidified togather with the grating building stones of volume behind two component dilatancy high polymer material generation chemical reactions of injection, fill up a hole from bottom to top, compacted hole wall ground expands, with the abundant combination of ground on every side, form the high polymer broken stone pile.
CN2013101349176A 2013-04-18 2013-04-18 Polymer gravel pile grouting method CN103233468A (en)

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US14/158,862 US20140314497A1 (en) 2013-04-18 2014-01-19 Polymer grouting method for constructing gravel pile

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103669340A (en) * 2013-12-06 2014-03-26 上海申元岩土工程有限公司 Polyurethane gravel pile and construction technology and application thereof
CN106948340A (en) * 2015-11-22 2017-07-14 合肥工业大学 A kind of construction method of the Manual excavated pile structure of high polymer grouting protection
CN108035344A (en) * 2017-12-20 2018-05-15 河海大学 A kind of permeable rigid pile of high polymer rubble and its construction technology
CN110331698A (en) * 2019-06-11 2019-10-15 徐州工程学院 A kind of system that polyurethane formation curtain was constructed and be rapidly injected to casement

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CN106284349A (en) * 2015-05-18 2017-01-04 五冶集团上海有限公司 Auxiliary pore-forming hammer piling construction method
CN111663555A (en) * 2020-06-24 2020-09-15 浙江大学 Jacket pile shoe sealing system based on expanded high polymer and sealing method thereof

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CN102444128A (en) * 2011-09-26 2012-05-09 郑州优特基础工程维修有限公司 Grouting method for ultrathin high polymer cutoff wall
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103669340A (en) * 2013-12-06 2014-03-26 上海申元岩土工程有限公司 Polyurethane gravel pile and construction technology and application thereof
CN106948340A (en) * 2015-11-22 2017-07-14 合肥工业大学 A kind of construction method of the Manual excavated pile structure of high polymer grouting protection
CN106948340B (en) * 2015-11-22 2019-02-12 合肥工业大学 A kind of construction method of the Manual excavated pile structure of high polymer grouting protection
CN108035344A (en) * 2017-12-20 2018-05-15 河海大学 A kind of permeable rigid pile of high polymer rubble and its construction technology
CN110331698A (en) * 2019-06-11 2019-10-15 徐州工程学院 A kind of system that polyurethane formation curtain was constructed and be rapidly injected to casement

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