阅读说明：本技术 一种箱型波纹钢通道的底部基础结构及其施工方法 (Bottom foundation structure of box-type corrugated steel channel and construction method thereof ) 是由 战福军 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种箱型波纹钢通道的底部基础结构及其施工方式,结构包括通道以及设于通道底部和底部两侧的基础,所述通道的底板为拱形,所述基础自下而上依次包括固化土层和混凝土层。本发明的水泥土强度不小于0.5MPa,混凝土强度不小于20MPa,通道顶部载荷通过侧板传递到底板角部,再通过底板外部的剪刀钉及混凝土填充传递到基础上,减少了底板的受力,底板可以减薄,节省造价；本发明能够节省80％的混凝土,充分利用工地的弃土,材料环保,节省了基础部分的造价。(The invention discloses a bottom foundation structure of a box-type corrugated steel channel and a construction method thereof. The strength of the cement soil is not less than 0.5MPa, the strength of the concrete is not less than 20MPa, the load at the top of the channel is transmitted to the corner of the bottom plate through the side plate and then transmitted to the foundation through the shear pin outside the bottom plate and the concrete filling, so that the stress of the bottom plate is reduced, the bottom plate can be thinned, and the manufacturing cost is saved; the invention can save 80% of concrete, fully utilizes the waste soil of the construction site, has environment-friendly materials and saves the manufacturing cost of the basic part.)

1. The utility model provides a bottom foundation structure of box corrugated steel passageway, its characterized in that includes passageway (1) and locates the basis of passageway (1) bottom and bottom both sides, bottom plate (2) of passageway (1) are the arch, the basis includes in proper order from bottom to top premixed flow state and can self-compaction's solidification soil layer and concrete layer (6).

2. The bottom substructure of a box-type corrugated steel walkway of claim 1, wherein the bottom plate (2) is provided with shear nails (3) at the outer sides of both ends.

3. The bottom substructure of a box-type corrugated steel channel according to claim 1, characterized in that said solidified soil layer is provided below the shear nails (3).

4. The bottom foundation structure of box-type corrugated steel walkway of claim 1, wherein the solidified soil layer comprises a first solidified soil layer (4) and a second solidified soil layer (5), the first and second solidified soil layers being poured separately.

5. The bottom substructure of a box-type corrugated steel channel according to claim 1, characterized in that said concrete layer (6) is submerged at both ends of the floor (2).

6. The bottom infrastructure of a box-type corrugated steel passageway according to claim 1, wherein the material of said solidified soil layer is selected from spoil excavated at a construction site, engineering mud, general purpose portland cement and a curing agent.

7. The bottom foundation structure of box-type corrugated steel walkway of claim 1, wherein a steel bar or mesh reinforcement is provided in the concrete layer (6).

8. A construction method of a bottom foundation of a box-type corrugated steel channel is characterized by comprising the following steps:

(1) preparing fluid self-compacting solidified soil by using spoil excavated on site, engineering slurry, general portland cement and a curing agent, and arranging a first solidified soil layer as a foundation cushion layer;

(2) after the first solidified soil layer is solidified, assembling an arch box type corrugated steel channel on the first solidified soil layer, and arranging shear nails outside two ends of a channel bottom plate;

(3) filling a second solidified soil layer in a gap between the bottom plate and the first solidified soil layer, and stopping filling when the plane of the second solidified soil layer is close to the shear nails outside the bottom plate;

(4) and after the second solidified soil layer is solidified, continuously filling the second solidified soil layer with concrete, wherein the concrete is filled in the second solidified soil layer and the second solidified soil layer is submerged at the end part of the bottom plate.

Technical Field

The invention relates to a foundation structure and a construction method thereof, in particular to a bottom foundation structure of a box-type corrugated steel channel and a construction method thereof.

Background

Environmental protection is especially important in city infrastructure, and the control power of urban environmental control to raise dust is crescent at present. Most of the foundations of the existing underground passages are cast by concrete, and the concrete production and transportation are difficult to control due to the particularity of the concrete, and are also difficult to treat in environmental protection and remediation.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide an environment-friendly and high-strength bottom foundation structure of a box-type corrugated steel channel and a construction method thereof, and aims to solve the problems.

The technical scheme is as follows: the bottom foundation structure of the box-type corrugated steel channel comprises the channel and foundations arranged at the bottom of the channel and on two sides of the bottom of the channel, wherein a bottom plate of the channel is arched, and the foundations sequentially comprise a solidified soil layer and a concrete layer from bottom to top. The solidified soil is premixed flow-state self-compacting solidified soil.

And shear nails are arranged on the outer sides of the two end parts of the bottom plate.

The solidified soil layer is arranged below the shear nails.

The solidified soil layer comprises a first solidified soil layer and a second solidified soil layer, and the first solidified soil layer and the second solidified soil layer are respectively poured.

The concrete layers are submerged at two ends of the bottom plate.

The materials of the solidified soil layer are abandoned soil, engineering slurry, general portland cement and a curing agent which are excavated on site.

And reinforcing steel bars or reinforcing steel bar meshes are arranged in the concrete layer.

The invention discloses a construction method of a bottom foundation of a box-type corrugated steel channel, which comprises the following steps:

(1) preparing fluid self-compacting solidified soil by using spoil excavated on site, engineering slurry, general portland cement and a curing agent, and arranging a first solidified soil layer as a foundation cushion layer;

(2) after the first solidified soil layer is solidified, assembling an arch box type corrugated steel channel on the first solidified soil layer, and arranging shear nails outside two ends of a channel bottom plate;

(3) filling a second solidified soil layer in a gap between the bottom plate and the first solidified soil layer, and stopping filling when the plane of the second solidified soil layer is close to the shear nails outside the bottom plate;

(4) and after the second solidified soil layer is solidified, continuously filling the second solidified soil layer with concrete, wherein the concrete is filled in the second solidified soil layer and the second solidified soil layer is submerged at the end part of the bottom plate.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:

(1) the strength of the cement soil is not less than 0.5MPa, the strength of the concrete is not less than 20MPa, the load at the top of the channel is transmitted to the corner of the bottom plate through the side plate and then transmitted to the foundation through the shear pin outside the bottom plate and the concrete filling, so that the stress of the bottom plate is reduced, the bottom plate can be thinned, and the manufacturing cost is saved;

(2) the invention can save 80% of concrete, fully utilize the waste soil of the construction site, have environment-friendly materials, save the fabrication cost of the basic part;

(3) the corner of the channel is formed by combining the corrugated steel plate, the shear nails and the concrete filling layer, so that the strength of the corner of the bottom plate is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

The applicant is dedicated to research and develop an underground passage or a box culvert, in the prior art, an arch box type corrugated steel passage is composed of four externally arched corrugated steel plates which are arranged at the upper part, the lower part, the left part and the right part, a concrete foundation cushion layer is arranged on a foundation at the bottom, the arch box type corrugated steel plate passage is placed on the concrete cushion layer, and a gap between the cushion layer and a passage bottom plate is filled with concrete until the left corner and the right corner of the bottom plate are submerged in the bottom of the corrugated steel plate bottom plate. The shear nails on the two sides form a combined structure, and when the load on the top of the channel is transmitted to the corners of the two ends of the bottom through the channel side plates, the load is transmitted to the foundation through the shear nails on the two sides of the bottom plate and the shear nails on the two sides of the bottom plate and the concrete, so that the stress of the corrugated steel plate on the bottom is reduced. The thickness of the bottom corrugated steel plate can be reduced, or the camber of the bottom corrugated steel plate can be reduced, so that the passing clearance inside the channel is increased. However, the method has the disadvantages of large concrete consumption, high manufacturing cost and environmental friendliness.

The bottom foundation structure of the box-type corrugated steel channel comprises a channel 1 and foundations arranged at the bottom of the channel 1 and on two sides of the bottom of the channel. The channel 1 consists of four arched corrugated steel plates, the arches facing outwards. The foundation is arranged at the lower part and the outer side of the bottom plate 2 of the channel and sequentially comprises a solidified soil layer and a concrete layer 6 from bottom to top. The cement soil is clay, silt, sand or waste soil, engineering slurry and the like which are mixed with small broken stones and are excavated in an engineering site, the raw material soil is used as a main material, general portland cement or other curing agents with the grade of 42.5 or more in a certain proportion are added, and the raw material soil and water are stirred to form a self-compacting filling material, and the strength can reach 0.5-1 MPa.

The two ends of the bottom plate 2 are provided with shear nails 3. The solidified soil layer is arranged below the shear nails 3, namely the solidified soil layer does not exceed the shear nails 3 at the end part of the bottom plate 2. The solidified soil layer comprises a first solidified soil layer 4 and a second solidified soil layer 5, and the first solidified soil layer and the second solidified soil layer are respectively poured. The material of the solidified soil layer comes from the residual earthwork, cement and additives on the construction site.

The concrete layer 6 is submerged at both ends of the base plate to improve the strength of both ends of the base plate 2. And reinforcing steel bars or reinforcing steel bar meshes are arranged in the concrete layer, so that the strength of the two ends of the bottom plate 2 is further improved.

The construction method of the structure specifically comprises the following steps:

(1) the method comprises the steps of preparing fluid cement soil by using earthwork, cement and an additive on a construction site, and arranging a first solidified soil layer to serve as a foundation mat layer. The cement soil is arranged on the excavated pit foundation, and the cement soil has certain strength after being solidified, so that the operation is convenient to carry out on the cement soil.

(2) After the first solidified soil layer is solidified, assembling an arch box type corrugated steel channel on the first solidified soil layer, and arranging shear nails outside two ends of a channel bottom plate;

(3) filling a second solidified soil layer in a gap between the bottom plate and the first solidified soil layer, and stopping filling when the plane of the second solidified soil layer is close to the shear nails outside the bottom plate; to ensure that the shear pins are equal to the concrete to form a stable corner structure.

(4) And after the second solidified soil layer is solidified, continuously filling the second solidified soil layer with concrete, wherein the concrete firstly passes through the shear nails and then continuously fills the second solidified soil layer until the second solidified soil layer passes through the end part of the bottom plate.

At the moment, the foundation is finished, and the end part of the bottom plate forms a combined structure of concrete, shear nails and a reinforcing mesh, so that the strength is higher; meanwhile, the concrete is only arranged at the end part, the using amount is saved by 80 percent compared with the existing mode, the strength of the end part of the bottom plate is ensured, and the concrete has better support to the force from the side plate and the upper part.