阅读说明：本技术 一种沥青混凝土公路改扩建路基搭接施工工艺 (Construction process for lapping and expanding roadbed of asphalt concrete highway ) 是由 俞冬旺 聂洪琳 杨书刚 周丽霞 余文 陈志才 罗蒙 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种沥青混凝土公路改扩建路基搭接施工工艺,包括以下步骤：S1、老路基的检测：采用环刀法或灌砂法对老路基与老路基基层的强度进行测量,得到老路基与老路基基层的压实强度；S2、新路基的开挖：根据S1的检测结果,具体操作如下：当老路基与老路基基层均达到普通高等级公路的路基路面压实度,只需清除老路基边侧的杂物,然后通过挖机或人工沿着老路基的路边向外侧进行开挖。本发明通过设置在新老路基内部的连接骨架和设置在路面板体上表面用于对拼接式路面板进行吊装的连接件,能够满足强度高,安装简便的需求,并且能够将拼接成路面的各块板连接成一个稳固的整体,从而增加了地基的稳固性。(The invention discloses a construction process for the overlap joint of a reconstructed and expanded roadbed of an asphalt concrete highway, which comprises the following steps of: s1, detection of old roadbed: measuring the strength of the old roadbed and the old roadbed base layer by adopting a ring cutter method or a sand filling method to obtain the compaction strength of the old roadbed and the old roadbed base layer; s2, excavating a new roadbed: according to the detection result of S1, the specific operation is as follows: when the old roadbed and the old roadbed base layer reach the roadbed and pavement compactness of the common high-grade highway, only sundries on the side of the old roadbed are needed to be removed, and then the old roadbed and the old roadbed base layer are excavated outwards along the roadside of the old roadbed by an excavator or manpower. The invention can meet the requirements of high strength and simple and convenient installation by the connecting framework arranged inside the new and old roadbed and the connecting piece arranged on the upper surface of the pavement slab body and used for hoisting the spliced pavement slab, and can connect all the plates spliced into the pavement into a stable whole, thereby increasing the stability of the foundation.)

1. A construction process for the overlap joint of a reconstructed and expanded roadbed of an asphalt concrete highway is characterized by comprising the following steps of:

s1, detection of old roadbed: measuring the strength of the old roadbed and the old roadbed base layer by adopting a ring cutter method or a sand filling method to obtain the compaction strength of the old roadbed and the old roadbed base layer;

s2, excavating a new roadbed: according to the detection result of S1, the specific operation is as follows;

(1) when the old roadbed and the old roadbed base layer reach the roadbed and pavement compactness of the common high-grade highway, only removing sundries on the side of the old roadbed, excavating outwards along the roadside of the old roadbed by an excavator or manually, expanding the span by 0.5-1m larger than the preset width, excavating downwards, and excavating to a bearing roadbed according to the pavement compactness;

(2) when the old roadbed base layer reaches the roadbed and pavement compactness of the common high-grade highway and the side of the old roadbed does not meet the standard of the common pavement, the part of the old roadbed which does not meet the standard needs to be planed, and then excavation is carried out according to the step (1) in S2;

(3) when the old roadbed reaches the roadbed and pavement compactness of the common high-grade highway and the old roadbed base layer does not conform to the common grade, the road collapses, the collapsed part is maintained, and then the step (1) in the step S2 is carried out continuously;

s3, splicing the new roadbed and the old roadbed: after the foundation stone of the new roadbed is dug in the S2, the foundation stone of the new roadbed is firstly paved, the foundation stone of the new roadbed and the foundation stone of the old roadbed are ensured to be in the same horizontal position, and then pouring can be carried out.

2. The asphalt concrete highway rebuilding and expanding roadbed overlapping construction process according to claim 1, which is characterized in that: in S1, the number of the detection points is not less than 2 detection points per 1000 meters of road in cooperation with the prior art.

3. The asphalt concrete highway rebuilding and expanding roadbed overlapping construction process according to claim 1, which is characterized in that: in S1, the distance between the detection point and the roadside of the road is not less than 0.5 m.

4. The asphalt concrete highway rebuilding and expanding roadbed overlapping construction process according to claim 1, which is characterized in that: in S2, the wheel load position needs to be avoided when the old roadbed is planed.

5. The asphalt concrete highway rebuilding and expanding roadbed overlapping construction process according to claim 1, which is characterized in that: the splicing process in the step S3 is shown in figure 1, and the concrete structure is as follows: old road bed (1), new road bed (2), enhancement layer board (3), reinforced groove (4), fixed column (5), fixed slot (6), slip casting hole (7), concrete operation flow is as follows:

(1) firstly, chiseling a reinforcing groove (4) matched with a reinforcing supporting plate (3) at the bottom of one side, close to a new roadbed (2), of an old roadbed (1);

(2) then the reinforcing supporting plate (3) is inserted into the reinforcing groove (4);

(3) mortar is injected into the reinforcing groove (4) to fix the reinforcing supporting plate (3). The preparation ratio of the concrete is as follows: 8 parts of stones, 4-6 parts of cement, 2.5-3.5 parts of sand, 1.3-2.5 parts of water, 0.25-0.58 part of water reducing agent, 1-1.8 parts of phenolic fibers and 3-8 parts of diatomite powder, wherein the concrete prepared by the proportioning has stronger tensile strength and increases the bearing capacity of a concrete structure;

(4) after the reinforcing supporting plate (3) is stable, placing the formed new roadbed (2) on the reinforcing supporting plate (3), and inserting the fixing columns (5) on the new roadbed (2) into the fixing grooves (6) on the side surfaces of the old roadbed (1);

(5) and finally, injecting mortar into the fixed groove (6) through the grouting hole (7) to complete the splicing of the new and old roadbeds.

Technical Field

The invention relates to the technical field of highway extension, in particular to a construction process for the lap joint of a roadbed of an asphalt concrete highway.

Background

The concatenation formula shingle nail is the flat-plate-shaped pavement board that makes good in advance, can conveniently hoist during the use to the building site of repairing the way on, the concatenation is spread on the road bed, constitutes the road surface fast, can effectively improve the efficiency of construction, current concatenation formula shingle nail design is more traditional, the connection each other is only connected through the structural style of bolt, the fastening degree of connection is not enough, the influence is spliced into the wholeness on road surface by it, lead to defects such as ftracture to appear easily in the road surface.

Disclosure of Invention

The invention aims to provide a construction process for the overlap joint of an asphalt concrete highway reconstruction and expansion roadbed, which aims to solve the problems in the background technology.

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

a construction process for the lapping of a reconstructed and expanded roadbed of an asphalt concrete highway comprises the following steps:

s1, detection of old roadbed: measuring the strength of the old roadbed and the old roadbed base layer by adopting a ring cutter method or a sand filling method to obtain the compaction strength of the old roadbed and the old roadbed base layer;

s2, excavating a new roadbed: according to the detection result of S1, the specific operation is as follows;

(1) when the old roadbed and the old roadbed base layer reach the roadbed and pavement compactness of the common high-grade highway, only removing sundries on the side of the old roadbed, excavating outwards along the roadside of the old roadbed by an excavator or manually, expanding the span by 0.5-1m larger than the preset width, excavating downwards, and excavating to a bearing roadbed according to the pavement compactness;

(2) when the old roadbed base layer reaches the roadbed and pavement compactness of the common high-grade highway and the side of the old roadbed does not meet the standard of the common pavement, the part of the old roadbed which does not meet the standard needs to be planed, and then excavation is carried out according to the step (1) in S2;

(3) when the old roadbed reaches the roadbed and pavement compactness of the common high-grade highway and the old roadbed base layer does not conform to the common grade, the road collapses, the collapsed part is maintained, and then the step (1) in the step S2 is carried out continuously;

s3, splicing the new roadbed and the old roadbed: after the foundation stone of the new roadbed is dug in the S2, the foundation stone of the new roadbed is firstly paved, the foundation stone of the new roadbed and the foundation stone of the old roadbed are ensured to be in the same horizontal position, and then pouring can be carried out.

Preferably, in S1, the number of the detection points is not less than 2 detection points per 1000 meters of road in cooperation with the prior art.

Preferably, in S1, the distance between the detection point and the roadside of the road is not less than 0.5 m.

Preferably, in S2, the wheel load position needs to be avoided when the old roadbed is planed.

Preferably, the splicing process in S3 is shown in fig. 1, and the specific structure is as follows: old road bed, new road bed, enhancement layer board, reinforced groove, fixed column, fixed slot, slip casting hole, concrete operation flow is as follows:

(1) firstly, chiseling a reinforcing groove matched with a reinforcing supporting plate at the bottom of one side, close to a new roadbed, of an old roadbed;

(2) then inserting the reinforcing supporting plate into the reinforcing groove;

(3) and injecting mortar into the reinforcing groove to fix the reinforcing supporting plate. The preparation ratio of the concrete is as follows: 8 parts of stones, 4-6 parts of cement, 2.5-3.5 parts of sand, 1.3-2.5 parts of water, 0.25-0.58 part of water reducing agent, 1-1.8 parts of phenolic fibers and 3-8 parts of diatomite powder, wherein the concrete prepared by the proportioning has stronger tensile strength and increases the bearing capacity of a concrete structure;

(4) after the reinforcing supporting plate is stable, placing the formed new roadbed on the reinforcing supporting plate, and inserting the fixing columns on the new roadbed into the fixing grooves on the side faces of the old roadbed;

(5) and finally, injecting mortar into the fixed grooves through the grouting holes, and completing splicing of the new roadbed and the old roadbed.

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

the invention can meet the requirements of high strength and simple and convenient installation by the connecting framework arranged inside the new and old roadbed and the connecting piece arranged on the upper surface of the pavement slab body and used for hoisting the spliced pavement slab, and can connect all the plates spliced into the pavement into a stable whole, thereby increasing the stability of the foundation and further increasing the stability of the foundation.

Drawings

FIG. 1 is a schematic diagram of the new and old foundation splicing process of the present invention.

In the figure: 1 old roadbed, 2 new roadbed, 3 reinforced supporting plate, 4 reinforced groove, 5 fixed column, 6 fixed groove, 7 grouting hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution:

a construction process for the lapping of a reconstructed and expanded roadbed of an asphalt concrete highway comprises the following steps:

s1, detection of old roadbed: measuring the strength of the old roadbed and the old roadbed base layer by adopting a cutting ring method or a sand filling method to obtain the compaction strength of the old roadbed and the old roadbed base layer, wherein in S1, the number of detection points is cooperated with the prior art, the number of the detection points is not less than 2 for each 1000 meters long of highway, and in S1, the distance between the detection points and the roadside of the highway is not less than 0.5 meter;

s2, excavating a new roadbed: according to the detection result of S1, the specific operation is as follows;

(1) when the old roadbed and the old roadbed base layer reach the roadbed and pavement compactness of the common high-grade highway, only removing sundries on the side of the old roadbed, excavating outwards along the roadside of the old roadbed by an excavator or manually, expanding the span by 0.5-1m larger than the preset width, excavating downwards, excavating to a bearing roadbed according to the pavement compactness, and in S2, avoiding the wheel load position when the old roadbed is planed;

(2) when the old roadbed base layer reaches the roadbed and pavement compactness of the common high-grade highway and the side of the old roadbed does not meet the standard of the common pavement, the part of the old roadbed which does not meet the standard needs to be planed, and then excavation is carried out according to the step (1) in S2;

(3) when the old roadbed reaches the roadbed and pavement compactness of the common high-grade highway and the old roadbed base layer does not conform to the common grade, the road collapses, the collapsed part is maintained, and then the step (1) in the step S2 is carried out continuously;

s3, splicing the new roadbed and the old roadbed: after the foundation stone of the new roadbed is dug and arranged in the S2, the foundation stone of the new roadbed and the foundation stone of the old roadbed are firstly paved, the foundation stone of the new roadbed and the foundation stone of the old roadbed are in the same horizontal position, then pouring can be carried out, the splicing process in the S3 is shown in figure 1, and the concrete structure is as follows: old road bed 1, new road bed 2, strengthen layer board 3, strengthening groove 4, fixed column 5, fixed slot 6, slip casting hole 7, concrete operation flow is as follows: firstly, a reinforcing groove 4 matched with a reinforcing supporting plate 3 is chiseled at the bottom of one side, close to a new roadbed 2, of an old roadbed 1, then the reinforcing supporting plate 3 is inserted into the reinforcing groove 4, mortar is injected into the reinforcing groove 4, and the reinforcing supporting plate 3 is fixed. The preparation ratio of the concrete is as follows: 8 parts of stones, 4-6 parts of cement, 2.5-3.5 parts of sand, 1.3-2.5 parts of water, 0.25-0.58 part of water reducing agent, 1-1.8 parts of phenolic fibers and 3-8 parts of diatomite powder, wherein the concrete prepared by the mixture ratio has stronger tensile strength and increases the bearing capacity of a concrete structure, after the reinforcing supporting plate 3 is stabilized, the formed new roadbed 2 is placed on the reinforcing supporting plate 3, the fixing columns 5 on the new roadbed 2 are inserted into the fixing grooves 6 on the side surfaces of the old roadbed 1, and finally mortar is injected into the fixing grooves 6 through the grouting holes 7, so that the splicing of the new roadbed and the old roadbed can be completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.