Công nghệ xử lý lún vệt bánh xe đường lát nhựa đường Giới thiệu công nghệ và giải pháp phòng chống lún đường English

Asphalt Surface Maintenance with Sedimentation Reinforcement


Table of Contents

I. Road Sedimentation in Vietnam
II. Reinforcement Approach
III. Maintenance Techniques

• GPCON
• RE-ASCON
IV. Construction Report

• GPCON
• RE-ASCON


I. Road Sedimentation in Vietnam
II. Reinforcement Approach
III. Maintenance Techniques

• GPCON
• RE-ASCON
IV. Construction Report

• GPCON
• RE-ASCON


1. Rode Sedimentation in Vietnam

2. Cause of Sedimentation

•Mix or Tamping Failure in Asphalt
•Increase Overloaded Vehicles
•Insufficient Reclamation Work
•Void on Underground or Sink on Middle-ground
•Water Inflow from Sandy Soil Part to Pave(Sink Hole)
•Groundwater Inflow – Causes Hole, Ground Soften,
Groundwater Level Change

• Soft Ground Level Difference


I. Road Sedimentation in Vietnam
II. Reinforcement Approach
III. Maintenance Techniques

• GPCON
• RE-ASCON
IV. Construction Report

• GPCON
• RE-ASCON


1. Reinforcement Approach

•GPCON: Soft Ground Reinforcement or Restoration Technique
+

•RE-ASCON: Asphalt Surface Maintenance Technique

2. Purpose of the Technique

•Prevent Traffic Accident by Excessive Road Sedimentation
•Provide Comfort Drive
•Prevent Asphalt Surface Aging and Degradation
•Expand Asphalt Life Span


I. Road Sedimentation in Vietnam
II. Reinforcement Approach
III. Maintenance Techniques

• GPCON
• RE-ASCON
IV. Construction Report

• GPCON
• RE-ASCON


• GPCON


1. GPCON

1)GPCON

•Reinforcement or Restoration Method for soft or unstable ground by using swelling stress of Micro-dense Polyurethane
2)Principle
•Widely used in Concrete Structure, Large Breakwater, etc.
•GPCON is expended when it is exposed on the air. It fills up the underground to increse the density of the soften ground.
Reinforce Bearing Capacity & Shearing Strength of Ground

• Capacity of Volume expansion - over 20~30 times,
• Inflation pressure - (50~1,000ton/m²)


2)GPCON Technical Diagram

Apply GPCON-B

Apply GPCON-A

GPCON
Inflation Installation

Inflation Hose

Concrete Slab

GPCON Expansion

Underground Void Space


3)GPCON Inflation Diagram

GPCON Inflation Gun

Max. Inflation Radius:4m

Inflation Pipe(12mm)
Concrete
Max. Drilling:1.5m

Application available
upto 4.5m~5m

Max. Inflation Depth:1.5m

Soft Ground

Max. Inflation Expansion:1.5m

GPCON Expansion

GPCON 지반보강도


4)Sectional Diagram of Reinforcement


5)Slab Restoration after GPCON Inflation

Concrete Slab

Concrete Slab

GPCON

Before

After


6)GPCON Application Process

Drilling(16mm)

Reinforcement

Pipe Inflation

GPCON Application


2. Strength of GPCON
1)Compression Strength

GPCON Compression Strength Chart
160
140
Compression Strength,ton/m^2
120
100
73.3
80

60
40
20
0

136.5

Inflation Amount,kg/m^3

3
2
1 = 82.6 kg/m - 73.3 ton/m
3
2
2 = 126.4kg/m - 136.5 ton/m

☞Compression Strength was Increased by
GPCON Inflation


2)Compression Strength Test

•GPCON is Semi-permanent since there is no change of the compression strength on the Test period.
3)Tensile Strength Test

•No Change for Tensile Strength


4)Compression Strength Test by Temp. Change

•GPCON shows slight change on Compression Strength Test by Temp. Change.
5)Compression Strength Test by Density Change

•Density and Compression Strength are Proportionally Increased(Density : C.S = 2 : 3)


6)Vibration Measurement by Cyclic Load

•GPCON has over 10 times of the effect of vibration reduction by cyclic loading test, and no contraction shows on cyclic loading test.


7)Soil Pollution Level

GPCON+Silica
Silica

Standard Value

•This Comparison test shows how Silica has soil pollution substance
after inflate GPCON in underground.

•Test Result: GPCON doesn’t contain harmful environment
substance.


8)Reaction Test of GPCON with Water

Water

Inflate GPCON

Expending

No Reaction with Water

Expansion

No Reaction At All


3. GPCON Application Area
1)Highway, Port, Railroad, Airport, Bridge

•Dike Construction, Dam, Canal, Reservoir, Sewerage System, Waterway

2)Commercial & Residential Area

•House, Factory, Building, Parking Lot, etc.

3)Industry

•Oil, Chemical, Plant, Tank, Shipyard


4. Comparison to Others
1) Comparison to other Technique

Cement Grout Slab-Jacking

GPCON

• Micro Particle Reinforcing Agent, Hardener, Cement, etc.

• Micro-dense Polyurethane

Hardening Time

•

Over 3 hours

• about 15 min.

Traffic Control

•

3~4 days

• 1 day

Material

① Drilling

① Drilling

② Inflation

② Inflation

Strengths

• High Penetration
• Complete Underground Fill-in
• Stable Bearing Power with wide Surface Application

• Inactivated w/ water
• Lightweight
• Low Unit Weight
• Permeability isn’ t matter for construction
• Fast Construction

Weaknesses

• Cement Contraction after Inflate
• Control Difficulty of Inflation quantity /curing time
• Long Curing time
• Work Difficulty in small space
• Unit Weight 2.3Ton/m3
• Low consturction ability on High Permeability ground
• Side structure affection

• Expertise needed
• High Price

Application Process


2)Strength of GPCON

•Inactivated with water
•24hour workable without affecting side structures(Hardening Time:15min.)
•No harmful environment substances
•No contraction, expansion, deterioration Semi-permanently after Inflation
•Precise Restoration feasibility
•Workable in small space
•Free for Temp. restriction
•Water cutoff, Anti-vibration
•Able to control Inflation quantity and area


• RE-ASCON