阅读说明：本技术 运营高等级公路半填半挖式路基病害综合处治方法 (Semi-filling and semi-excavating type roadbed disease comprehensive treatment method for operation high-grade highway ) 是由 蒋一波 唐颖 胡俊 陈红斌 于 2020-06-05 设计创作，主要内容包括：本发明涉及运营高等级公路半填半挖式路基病害综合处治方法,通过研究运营高等级公路半填半挖路基的稳定性问题,针对不同的情况,提出不同的处治措施,通过事前预防加固、事后综合治理、提高路基质量、确保整体稳定、缩短施工周期、对既有交通影响小的施工工法,解决路基抢险施工周期慢、工期短难题；培养应用型技术人员；同时做好技术储备,为今后的类似工程施工提供参考、推广应用。(The invention relates to a method for comprehensively treating diseases of a semi-filled and semi-excavated roadbed of an operated high-grade highway, which is characterized in that different treatment measures are provided aiming at different conditions by researching the stability problem of the semi-filled and semi-excavated roadbed of the operated high-grade highway, and the problems of slow rescue construction period and short construction period of the roadbed are solved by the construction method of pre-prevention reinforcement, post-comprehensive treatment, improvement of roadbed quality, integral stability guarantee, construction period shortening and small influence on the existing traffic; cultivating an application technician; meanwhile, technical reserve is made, and reference, popularization and application are provided for similar engineering construction in the future.)

1. The utility model provides a method for comprehensively treating semi-filled and semi-excavated roadbed diseases of an operation high-grade highway, which is characterized by comprising the following steps:

monitoring uneven settlement of road surface, side slope protective structure damage, slope foot retaining structure displacement change, drainage structures work effect, domatic change and the infiltration condition, maintaining punishment to abnormal state to carry out following processing based on the monitoring situation:

a. monitoring the cracks on the pavement, injecting a crack pouring glue into the cracks by adopting a pressure device of a crack pouring machine, and blocking the cracks;

b. monitoring the crack of the pavement and the continuous development, and performing preventive reinforcement on the pavement;

c. monitoring the whole instability of the road filling side slope, and the collapse of the road surface, and reinforcing by a retaining structure and combining with soil body backfilling to perform comprehensive treatment.

2. The method of claim 1, wherein the monitoring frequency is increased when the non-uniform settlement value of the monitored road surface increases and has no convergence tendency.

3. The method of claim 1, wherein after transverse and longitudinal cracks appear in the uneven settlement area of the roadbed, the monitoring frequency is increased, horizontal displacement observation is increased based on the crack development condition, and cement slurry is poured to seal when the cracks develop further.

4. The method of claim 1, wherein in b, the prophylactically strengthening comprises:

carrying out deep displacement monitoring on the road surface to determine a sliding surface;

embedding anchor cable construction into rock mass on the excavation side slope to stabilize the side slope;

manufacturing a steel flower pipe pile and embedding the steel flower pipe pile into a filling slope stabilizing layer;

making a crown beam to connect the anchor cable and the steel flower pipe pile;

and milling and re-paving the pavement in the crack area.

5. The method of claim 4, wherein deep displacement monitoring is performed using a borehole inclinometer.

6. The method of claim 1, wherein in c, the treatment process is as follows:

embedding the steel flower pipe pile into the filling and digging interface stabilizing layer;

additionally arranging an annular intercepting ditch for intercepting accumulated water outside the slope of the side slope;

a supporting structure is additionally arranged at the slope toe;

breaking loose soil with saturated water content in road surface excavation and transportation, and improving and compacting the residual soil;

and (7) backfilling the roadbed.

7. The method of claim 6, further comprising adding a drainage facility to drain the collapsed subgrade body impoundment.

8. The method of claim 1 or 6, wherein the retaining structure is a friction pile or a retaining wall.

9. The method of claim 6, wherein the soil improvement comprises tedding and ash mixing.

10. The method of claim 1 or 6, wherein the subgrade is backfilled with foamed lightweight soil.

Technical Field

The invention belongs to the technical field of highway engineering, and particularly relates to a method for comprehensively treating diseases of a semi-filled and semi-excavated roadbed of an operation high-grade highway.

Background

In recent years, natural disasters such as water damage of expressways in China occur frequently in flood season, and construction in a smaller construction range is needed to meet the requirement of quickly recovering traffic after the water damage disasters occur, and the influence on operating expressways is reduced as much as possible. Therefore, new construction technology needs to be continuously researched on the construction method, and the rapid traffic recovery of the expressway is ensured.

Disclosure of Invention

The invention aims to provide a method for comprehensively treating the semi-filling and semi-excavating roadbed diseases of an operation high-grade highway.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for comprehensively treating semi-filling and semi-excavating roadbed diseases of an operation high-grade highway comprises the following steps:

monitoring uneven settlement of road surface, side slope protective structure damage, slope foot retaining structure displacement change, drainage structures work effect, domatic change and the infiltration condition, maintaining punishment to abnormal state to carry out following processing based on the monitoring situation:

a. monitoring the cracks on the pavement, injecting a crack pouring glue into the cracks by adopting a pressure device of a crack pouring machine, and blocking the cracks;

b. monitoring the crack of the pavement and the continuous development, and performing preventive reinforcement on the pavement;

c. monitoring the whole instability of the road filling side slope, and the collapse of the road surface, and reinforcing by a retaining structure and combining with soil body backfilling to perform comprehensive treatment.

Furthermore, when the uneven settlement value of the monitored road surface is increased and has no convergence tendency, the monitoring frequency is increased.

Furthermore, after transverse and longitudinal cracks appear in the uneven settlement area of the roadbed, the monitoring frequency is improved, horizontal displacement observation is increased based on the crack development condition, and cement slurry is timely poured to seal when the cracks are further developed.

Further, in the b, the preventive reinforcement includes:

carrying out deep displacement monitoring on the road surface to determine a sliding surface;

embedding anchor cable construction into rock mass on the excavation side slope to stabilize the side slope;

manufacturing a steel flower pipe pile and embedding the steel flower pipe pile into a filling slope stabilizing layer;

making a crown beam to connect the anchor cable and the steel flower pipe pile;

and milling and re-paving the pavement in the crack area.

Further, a borehole inclinometer is adopted for deep displacement monitoring.

Further, in the step c, the treatment process is as follows:

embedding the steel flower pipe pile into the filling and digging interface stabilizing layer;

additionally arranging an annular intercepting ditch for intercepting accumulated water outside the slope of the side slope;

a supporting structure is additionally arranged at the slope toe;

breaking loose soil with saturated water content in road surface excavation and transportation, and improving and compacting the residual soil;

and (7) backfilling the roadbed.

Further, the method also comprises the step of additionally arranging a drainage facility to drain the accumulated water of the soil body of the collapsed roadbed.

Further, the supporting and retaining structure is an anti-slide pile or a retaining wall.

Further, the soil improvement mode comprises the steps of tedding and ash mixing treatment.

And further, backfilling the roadbed by adopting foamed lightweight soil. The foamed light soil can reduce the weight of the roadbed, and further reduce the gliding force.

According to the method, different treatment measures are provided aiming at different situations by researching the stability problem of the semi-filled and semi-excavated roadbed of the high-grade highway in operation, and the problems of slow roadbed emergency construction period and short construction period are solved by a construction method which is used for preventing and reinforcing in advance, comprehensively treating after the situation, improving the roadbed quality, ensuring the overall stability, shortening the construction period and having small influence on the existing traffic; cultivating an application technician; meanwhile, technical reserve is made, and reference, popularization and application are provided for similar engineering construction in the future.

Detailed Description

The construction method aims at the semi-filling and semi-excavating roadbed of the operation high-grade highway, and comprises the following steps:

(1) early observation and simple processing:

1. observation of uneven settlement of road surface

The method is characterized in that the uneven settlement of the road surface is observed aiming at the key road section, all-weather observation is carried out through a settlement observation instrument, and the observation frequency is enhanced when the uneven settlement value is increased and has no convergence tendency.

2. Observation after occurrence of transverse and longitudinal cracks in uneven settlement area of roadbed

And after transverse and longitudinal cracks appear in the uneven settlement area, the settlement observation frequency is enhanced, the crack development condition is observed in real time, horizontal displacement observation is added, and cement slurry is timely poured for sealing when the cracks are further developed.

3. Side slope protection structure damage observation

The overall stability condition of the roadbed can be reflected by the damage degree of the side slope protection structure, and if cracks and displacement occur in the side slope protection structure, horizontal displacement observation needs to be strengthened.

4. Toe retaining structure displacement observation

The slope toe retaining structure is of great importance to the overall stability of the roadbed, the displacement change condition of the slope toe retaining structure without objects is observed, and the overall stability condition of the roadbed can be intuitively obtained.

5. Observation of working effect of drainage structure

After a long period of heavy rain, the roadbed rock-soil body absorbs water and is saturated, the dead weight is increased, the gliding force is increased, the slippery soil is softened when encountering water, the shear strength is reduced, the anti-slip force is reduced, and whether the drainage structure can timely and quickly discharge roadbed surface water and internal water can greatly influence the stability of the roadbed.

6. Slope change and water seepage observation

Whether the slope surface has change or not and whether the slope has water seepage or not can be qualitatively analyzed, and if the conditions exist, the condition can be timely treated.

7. Crack pouring of pavement crack, damage repairing of structure and function recovery

When cracks appear on the road surface, the special crack pouring glue is uniformly and fully injected into the cracks by adopting a pressure device of a crack pouring machine, so that the cracks are completely sealed and compacted by the sealing glue without gaps, and the sealing glue is adapted to the change of the crack width along with the change of the air temperature by utilizing the good waterproof performance, the adhesiveness and the temperature stability of the sealing glue, thereby avoiding the secondary cracking after the crack pouring.

When the structure is damaged, the cracked wall body is filled with epoxy resin, acrylic gel, cyanogen gel and other materials to repair the wall body.

8. And long-term continuous observation shows that when cracks do not develop after crack pouring, the protective structure is intact, and the side slope is stable, the diseases are eliminated, and the roadbed can work normally.

(2) Preventive reinforcement for continuous development of cracks

1. Traffic control in crack area to reduce traffic lanes

When pavement cracks continuously develop, roadbed reinforcement measures are necessary, traffic control is carried out on regional road sections generated by the cracks, traffic volume is reasonably shunted, standard construction marks are placed, and traffic flow marks are changed.

2. Deep hole inclination measurement and determination of sliding surface

For most practical projects, a borehole inclinometer is generally adopted for deep displacement monitoring. Deep displacement monitoring is an important link in a landslide monitoring system, and the main monitoring content is measurement of a displacement vector profile along a vertical drilling hole, a prominent peak value and differential lateral displacement in axial strain distribution can be analyzed, and the position of a discontinuous point in a displacement field can be found out, so that accurate grading, blocking and layering are carried out on a landslide.

3. Rock mass in excavation side slope embedded with construction anchor cable

When the side slope is unstable, the anchor cable construction can be adopted on the excavated side slope to be embedded into the rock mass. The construction process comprises the following steps: drilling, anchor cable manufacturing and installation, grouting and grouting, tensioning, anchoring, concrete framing, inspection and the like.

4. Embedding of construction steel flower pipe pile into filling slope stabilization layer

The construction of the steel flower pipe pile is divided into; manufacturing and constructing a steel flower pipe, grouting the steel flower pipe pile, pouring a reinforced concrete platform, and inspecting the quality of the steel flower pipe pile.

5. Construction crown beam connecting anchor cable and steel flower pipe pile

And a crown beam is constructed to connect the anchor cable and the steel flower pipe pile, so that the integrity of the roadbed protection structure is enhanced.

6. Milling and re-paving road surface in crack area

Confirming the re-paving position, milling and paving asphalt.

7. The traffic is recovered to be normal, and the long-term continuous observation shows that the milled and re-paved road surface has no cracks and the diseases are eliminated.

(3) Comprehensive treatment method for overall instability of filling side slope and collapse of road surface

1. Single-width bidirectional pass for closed traffic and excavation road

And when the construction road section needs to be constructed in a semi-closed manner, the safety warning signs are completely and obviously arranged. When the construction method of half-width is adopted for construction, a front construction signboard, a left-right diversion guide signboard and a speed limit 20 sign are sequentially arranged along the direction of a traveling vehicle, a safety cone is used for isolating an enough safe construction area, and a person is arranged to put a red flag to remind a passing driver to slow down.

2. And embedding the steel flower pipe piles into the filling and digging interface stabilizing layer.

3. Additionally arranging a whole-area large-section annular intercepting ditch for intercepting accumulated water outside the slope of the side slope and additionally arranging a drainage facility for draining the accumulated water of the soil body of the collapsed roadbed.

4. And the slope toe is additionally provided with retaining structures such as anti-slide piles, retaining walls and the like, so that the stability of the roadbed is improved.

5. The loose soil body with saturated water content is excavated and transported on the road surface, and the residual soil body is improved and compacted, and can be turned over, sunned and doped with ash.

6. The foamed light soil is used for backfilling the roadbed, so that the weight of the roadbed is reduced, and the gliding force is further reduced.

7. Restoring the road surface and slope protection structure and sealing the central separation belt.

8. And recovering traffic, and continuously observing for a long time, wherein cracks do not appear on the road surface, the slope surface does not change, the slope foot does not displace, the structure is complete, the drainage setting work is normal, and the diseases are eliminated.