阅读说明：本技术 一种沙漠地区高速公路风积沙路基压实方法 (Method for compacting wind-accumulated sand roadbed on highway in desert area ) 是由 党贵平 谷晓华 李军 张喜成 张良 王永龙 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种沙漠地区高速公路风积沙路基压实方法,涉及公路工程技术领域。包括以下步骤：步骤一,清理路段表面杂物,并对其进行放线；步骤二,对放线后的路段沿着线路的纵向进行分段,随后将风积沙采用推土机进行摊铺,其中,在摊铺的过程中采用水平分层方式进行摊铺；步骤三,待最后一次摊铺完成后,利用推土机整体排压至少2遍,再采用压路机稳压1～3遍,随后采用振动压路机压实2～4遍,最后静压收面1～2遍,即得压实后的路基层；本发明可缩短各工序施工,尤其是碾压工序和上料,同时加快了工序转换速度,对施工进度有明显的提高。(The invention discloses a method for compacting a wind-accumulated sand roadbed on a highway in a desert area, and relates to the technical field of highway engineering. The method comprises the following steps: cleaning sundries on the surface of a road section, and paying off the road section; segmenting the payed road section along the longitudinal direction of the line, and then paving the aeolian sand by adopting a bulldozer, wherein a horizontal layering mode is adopted in the paving process; step three, after the last paving is finished, integrally discharging and pressing for at least 2 times by using a bulldozer, stabilizing the pressure for 1-3 times by using a road roller, compacting for 2-4 times by using a vibratory road roller, and finally performing static pressure collection for 1-2 times to obtain a compacted roadbed layer; the invention can shorten the construction of each procedure, especially the rolling procedure and the feeding, and simultaneously quickens the procedure conversion speed, thereby obviously improving the construction progress.)

1. A method for compacting a wind-accumulated sand roadbed on a highway in a desert area is characterized by comprising the following steps:

cleaning sundries on the surface of a road section, and paying off the road section;

segmenting the payed road section along the longitudinal direction of the line, and then paving the aeolian sand by using a bulldozer, wherein the paving is performed in a horizontal layering mode in the paving process, after each layer of paving is completed, the bulldozer is used for discharging and pressing for at least 2 times, and then the next layer of paving is performed;

step three, after the last paving is finished, integrally discharging and pressing for at least 2 times by using a bulldozer, stabilizing the pressure for 1-3 times by using a road roller, compacting for 2-4 times by using a vibratory road roller, and finally performing static pressure collection for 1-2 times to obtain a compacted roadbed layer;

and step four, after the static pressure surface collection is finished, sampling and detecting the roadbed, carrying out next procedure construction after the specified compaction standard is reached, repeating the step three after the specified compaction standard is not reached, and continuously compacting until the compaction standard is met.

2. The method for compacting the wind-blown sand subgrade on the expressway in the desert area as recited in claim 1, wherein in the second step, the paving is horizontally divided into at least two layers.

3. The method for compacting the wind-deposited sand roadbed on the expressway in the desert area as recited in claim 2, wherein the thickness of each paved layer is 65-80 cm.

4. The method for compacting the wind-blown sand subgrade on the expressway in the desert area as recited in claim 1, wherein in the first step, after the line is released, edge-covered gravel soil is constructed on two sides of the section.

5. The method for compacting the wind-blown sand bed on the expressway in the desert area as recited in claim 1, wherein in the second step, after each layer of the wind-blown sand is paved, a bulldozer is used to roll the roadbed from the edge of the roadbed to the center of the roadbed, and the overlapping width of the wheel tracks is not less than 2/3 single-wheel width.

6. The method for compacting the wind-blown sand subgrade on the expressway in the desert area as recited in claim 1, wherein in the second step, one section is arranged every 200-400 meters in the longitudinal direction.

7. The method for compacting the wind-blown sand subgrade on the expressway in the desert area as recited in claim 1, wherein the bulldozer is selected according to the weight of more than or equal to 80t during operation.

8. The method for compacting the wind-blown sand bed on the highway in the desert area according to the claim 1, wherein the width of overlapping wheel tracks is not less than 1/3 single-wheel width when the roller and the vibratory roller are rolled.

Technical Field

The invention relates to the technical field of highway engineering, in particular to a method for compacting a wind-blown sand roadbed on a highway in a desert area.

Background

In the desert abdominal land of the aeolian sand, water resources are scarce, the natural moisture content of the aeolian sand is less than 3 percent, the aeolian sand is in a loose state, and a road roller for filling and rolling the conventional roadbed is selected and can not walk. Particularly, the small-tonnage and small-horsepower road roller is selected and cannot be rolled, and the damage such as vehicle sinking and the like is easy to occur.

In order to achieve the purpose, based on the characteristics of wind-blown sand, the feeding and rolling of the second layer by the skilled person have the problems of vehicle sinking, abnormal rolling of the compaction machine and the like, and particularly, the compaction equipment with normal power cannot run when the compaction machine rolls for the first time. The increased power of the compacting equipment is selected, which leads to increased cost and energy consumption.

Disclosure of Invention

In order to solve the defects in the background technology, a method for compacting the wind-blown sand subgrade on the highway in the desert area is provided. The method can shorten the construction of each procedure, particularly the rolling procedure and the feeding, and simultaneously quickens the procedure conversion speed and obviously improves the construction progress.

The invention aims to provide a method for compacting a wind-accumulated sand roadbed on a highway in a desert area, which comprises the following steps:

cleaning sundries on the surface of a road section, and paying off the road section;

segmenting the payed road section along the longitudinal direction of the road, and then paving the aeolian sand by a bulldozer, wherein the paving is carried out in a horizontal layering mode in the paving process, after each layer of paving is finished, the bulldozer is used for carrying out pressure discharge for at least 2 times, and then the next layer of paving is carried out;

step three, after the last paving is finished, integrally discharging and pressing for at least 2 times by using a bulldozer, stabilizing the pressure for 1-3 times by using a road roller, compacting for 2-4 times by using a vibratory road roller, and finally performing static pressure collection for 1-2 times to obtain a compacted roadbed layer;

and step four, after the static pressure surface collection is finished, sampling and detecting the roadbed, carrying out next procedure construction after the specified compaction standard is reached, repeating the step three after the specified compaction standard is not reached, and continuously compacting until the compaction standard is met.

Preferably, in the second step, at least two layers of the materials are horizontally paved in the paving process.

More preferably, the thickness of each layer of paving is 65-80 cm.

Preferably, in the step one, after the line is released, edge-covered gravel soil is constructed on two sides of the road section.

Preferably, in the second step, after each windy sand layer is paved, a bulldozer is adopted to roll the roadbed from the edge of the roadbed to the center of the roadbed, and the overlapping width of the wheel tracks is not less than the width of 1/3 single wheels during rolling.

Preferably, in the second step, every 200-400 meters in the longitudinal direction is one section.

Preferably, the bulldozer is selected based on a weight of 80t or more during operation.

Preferably, the width of overlap of the tracks is not less than 1/3 width per wheel when the roller and the vibroroller are rolled.

Compared with the prior art, the invention has the beneficial effects that:

the method for compacting the wind-blown sand subgrade on the highway in the desert area can shorten the construction of each process, particularly the rolling process and the feeding process, and simultaneously quickens the process conversion speed and obviously improves the construction progress.

The invention carries out longitudinal segmentation and horizontal layered filling construction according to the actual situation on site. The construction road section is formed into an E shape every 200-400 m longitudinal sections, so that the transport vehicle can turn around and be conveniently loaded, a bulldozer can pave (longitudinally section and horizontally layer filling construction), the whole pressure discharge of the bulldozer, the pressure stabilization of a road roller, the vibration rolling of the vibration road roller and the static pressure surface compaction are sequentially carried out, and the compactness required by the design can be achieved.

Detailed Description

In order to make the technical solutions of the present invention better understood and enable those skilled in the art to practice the present invention, the following embodiments are further described, but the present invention is not limited to the following embodiments.

Example 1

A method for compacting a wind-accumulated sand roadbed on a highway in a desert area comprises the following steps:

cleaning sundries on the surface of a road section, and paying off the road section;

segmenting the paid-off road section along the longitudinal direction of the road, and then paving the aeolian sand by adopting a bulldozer, wherein a horizontal layering mode is adopted in the paving process; after paving each layer, adopting a bulldozer to discharge and press for at least 2 times, and then paving the next layer;

step three, after the last paving is finished, integrally arranging and pressing for 2 times by using a bulldozer, stabilizing the pressure for 2 times by using a road roller, compacting for 2 times by using a vibration road roller, and finally performing static pressure collection for 2 times to obtain a compacted road base layer;

and step four, after the static pressure surface collection is finished, sampling and detecting the roadbed, carrying out next procedure construction after the specified compaction standard is reached, repeating the step three after the specified compaction standard is not reached, and continuously compacting until the compaction standard is met.

Wherein, in the process of spreading, the three layers of the materials are horizontally spread; the thickness of each layer of the paving is 70 cm;

step one, after paying off, constructing edge-covered gravel soil on two sides of a road section;

paving the first-layer aeolian sand layer from the inner side of the edge-covered gravel soil to the center of the roadbed by using a bulldozer, and then continuously paving the aeolian sand layer by using the bulldozer; and after each windy sand layer is paved, a bulldozer is adopted to roll the roadbed from the edge of the roadbed to the center of the roadbed, and the overlapping width of the wheel tracks is not less than the width of 2/3 single wheels during rolling.

One segment per 300 meters in the longitudinal direction.

The bulldozer selects the bulldozer according to the weight of more than or equal to 80t in the operation process.

When the roller and the vibration roller are used for rolling, the width of the overlapping wheel tracks is not less than 1/3 single-wheel width.

Example 2

A method for compacting a wind-accumulated sand roadbed on a highway in a desert area comprises the following steps:

cleaning sundries on the surface of a road section, and paying off the road section;

segmenting the payed road section along the longitudinal direction of the road, and then paving the aeolian sand by a bulldozer, wherein the paving is carried out in a horizontal layering mode in the paving process, after each layer of paving is finished, the bulldozer is used for carrying out pressure discharge for at least 2 times, and then the next layer of paving is carried out;

step three, after the last paving is finished, integrally arranging and pressing for 2 times by using a bulldozer, stabilizing the pressure for 1 time by using a road roller, compacting for 2 times by using a vibration road roller, and finally performing static pressure collection for 1 time to obtain a compacted road base layer;

and step four, after the static pressure surface collection is finished, sampling and detecting the roadbed, carrying out next procedure construction after the specified compaction standard is reached, repeating the step three after the specified compaction standard is not reached, and continuously compacting until the compaction standard is met.

Wherein, in the process of paving, five layers of materials are horizontally paved, and the paving thickness of each layer can reach 70 cm;

in the first step, after paying off, edge-covered gravel soil is constructed on two sides of the road section.

Paving the first-layer aeolian sand layer from the inner side of the edge-covered gravel soil to the center of the roadbed by using a bulldozer, and then continuously paving the aeolian sand layer by layer through the bulldozer; and after each windy sand layer is paved, a bulldozer is adopted to roll the roadbed from the edge of the roadbed to the center of the roadbed, and the overlapping width of the wheel tracks is not less than the width of 2/3 single wheels during rolling.

One segment per 400 meters in the longitudinal direction.

The bulldozer selects the bulldozer according to the weight of more than or equal to 80t in the operation process.

When the roller and the vibration roller are used for rolling, the width of the overlapping wheel tracks is not less than 1/3 single-wheel width.

In conclusion, the method for compacting the wind-deposited sand roadbed on the highway in the desert area can shorten the construction of each process, particularly the rolling process and the feeding process, and simultaneously quickens the process conversion speed and obviously improves the construction progress.

The invention carries out longitudinal segmentation and horizontal layered filling construction according to the actual situation on site. The construction road section is formed into an E shape every 200-400 m longitudinal sections, so that the transport vehicle can turn around and be conveniently loaded, a bulldozer can pave (longitudinally section and horizontally layer filling construction), the whole pressure discharge of the bulldozer, the pressure stabilization of a road roller, the vibration rolling of the vibration road roller and the static pressure surface compaction are sequentially carried out, and the compactness required by the design can be achieved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.