CN216811698U - A kind of rotary spray jacking construction structure - Google Patents

Abstract

The utility model discloses a jet grouting pushing construction structure. The device comprises a pushing pipe joint, a pre-buried steel plate, a rotary spray head fixing frame and a rotary spray pipe; the pushing pipe joint comprises a pushing first pipe section and a common pipe joint connected to the rear of the pushing first pipe section; the pre-buried steel plate is positioned at the front end of the pushing first pipe section; the rotary spray nozzle fixing frame is welded on the inner side of the embedded steel plate; the rotary spray head is arranged on the rotary spray head fixing frame and is positioned on the inner side of the embedded steel plate; the rotary spray head is connected with the rotary spray pipe. The utility model overcomes the defects of complex construction process, high construction site requirement, inapplicability to construction sites with pipe culverts and smaller tunnel diameter and higher construction cost in the prior art; the construction method has the advantages of being exquisite in structure, high in applicability, suitable for construction of various city pipe culverts and tunnels and low in construction cost.

Description

A kind of rotary spray jacking construction structure

technical field

The utility model relates to the technical field of municipal underground pipe culvert and tunnel construction, in particular to a rotary jet jacking construction structure. More specifically, it is a new tunnel construction structure that applies the rotary jet technology to the jacking construction.

Background technique

The construction of urban pipe culverts and tunnels is often limited by factors such as ground traffic, existing pipelines and construction sites, and open-cut construction cannot be realized.

Trenchless construction technology is increasingly applied in urban pipe culvert and tunnel construction. The construction process of trenchless underground pipe culverts and tunnels is complex, the construction site requirements are high, and the construction cost is generally high. Common trenchless underground pipe culverts and tunnel construction generally use shield tunneling, undercut, pipe jacking or directional drilling. However, the above methods either require complicated construction techniques, require high construction sites, or have high construction costs. Especially when the diameter of pipe culverts and tunnels is small, construction methods such as shield tunneling, underground excavation, and pipe jacking will no longer be applicable.

Therefore, it is necessary to develop an underground pipe culvert and tunnel construction structure with simple operation and low construction cost, which is suitable for the construction of various urban pipe culverts and tunnels.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a rotary spray jacking construction structure, which is a new municipal underground pipe culvert and tunnel construction structure, which has an exquisite structure and strong applicability, and is suitable for the construction of various urban pipe culverts and tunnels. Construction costs are low.

In order to achieve the above purpose, the technical scheme of the present utility model is: a rotary spray jacking construction structure, comprising a jacking pipe section, and is characterized in that: it also includes a pre-embedded steel plate, a rotary nozzle, a rotary nozzle fixing frame and a rotary nozzle;

The jacking pipe section includes the first jacking pipe section and the common pipe section connected behind the first jacking pipe section;

The embedded steel plate is located at the front end of the first pipe section of the jack;

The rotating nozzle fixing frame is welded on the inner side of the embedded steel plate;

The swirling nozzle is installed on the swirling nozzle fixing frame and is located inside the embedded steel plate;

The swirling nozzle is connected with the swirling nozzle.

In the above technical solution, the swirling nozzle is a high-pressure swirling nozzle; there are multiple swirling nozzles.

In the above technical solution, the swirling nozzle is vertically arranged with the jacking pipe section, and/or is arranged vertically with the excavation face.

In the above technical solution, the pre-embedded steel plate protrudes out of the front end of the first pipe section for a certain length.

In the above technical solution, the swirl nozzle is arranged in the push pipe section.

The utility model has the following advantages:

(1) The utility model utilizes the cutting action of the high-pressure swirling jet on the soil body, and installs the high-pressure swirling jet on the end of the first section of the pipe of the jacking. The soil body within the pipe diameter range is cut, and then the water flow generated by the high-pressure swirl jet is used to bring the soil body along the pipeline to the originating well, so as to realize fully mechanized excavation and slag discharge; the utility model effectively solves the problem of small hole diameter pipe culverts. , the difficulty of manual operation in tunnel construction; at the same time, the utility model has the characteristics of simple operation, high efficiency, convenient construction and low cost;

(2) The utility model follows the principle of simplicity and convenience, and realizes the convenient construction of small-diameter pipe culverts and tunnels; at the same time, the utility model has the advantages of low cost and simple operation, and can bring better economic and social benefits. .

Description of drawings

Figure 1 is a schematic diagram of a structural construction structure of the present invention.

In the picture, 1-Jumping pipe section, 1.1-Jumping first pipe section, 1.2-Ordinary pipe section, 2-Embedded steel plate, 3-Rotating nozzle, 4-Rotating nozzle fixing frame, 5-Rotating nozzle, 6-Starting Make a working well.

Detailed ways

The implementation of the present utility model will be described in detail below with reference to the accompanying drawings, but they do not constitute a limitation to the present utility model, but only serve as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

Referring to the accompanying drawings, it can be known that a rotary spray jacking construction structure includes a jacking pipe section 1, a pre-embedded steel plate 2, a rotary spray head 3, a rotary spray head fixing frame 4 and a rotary spray pipe 5;

The jacking pipe section 1 includes the first jacking pipe section 1.1 and the common pipe section 1.2 connected behind the first jacking pipe section 1.1;

The embedded steel plate 2 is located at the front end of the first pipe section 1.1 of the jacking; on the one hand, it is convenient to cut the soil during the jacking process, and on the other hand, it is convenient to weld the rotating nozzle fixing frame on the inside;

The rotating nozzle fixing frame 4 is welded on the inner side of the embedded steel plate 2;

The swirling nozzle 3 is installed on the swirling nozzle fixing frame 4 and is located inside the pre-embedded steel plate 2; to prevent the high-pressure swirling jet from damaging the soil beyond the diameter of the jacking pipe and causing collapse;

The swirling nozzle 3 is connected with the swirling nozzle 5 (as shown in FIG. 1 ); the utility model has an exquisite structure, strong applicability, and is suitable for the construction of various urban pipe culverts and tunnels, and the construction cost is low.

Further, the swirling material of the swirling nozzle 3 is water, or air, or a mixture of water and air, which is determined according to the characteristics of the soil.

Further, the swirling nozzle 3 is a high-pressure swirling nozzle; there are multiple swirling nozzles 3 .

Further, the swirling nozzle 3 is arranged vertically with the jacking pipe section 1, and/or is arranged vertically with the excavation face (as shown in Figure 1); according to the properties of the soil, in addition to setting the nozzles in the vertical pipe jacking direction , and the nozzles perpendicular to the excavation face can also be added, which is convenient for cutting the soil.

Further, the pre-embedded steel plate 2 is extended to push the front end of the first pipe section 1.1 for a certain length (as shown in Figure 1);

Further, the swirl nozzle 5 is arranged in the push pipe section 1;

High-pressure flushing nozzles are arranged in the jacking pipe section 1 (as shown in Figure 1);

The high-pressure flushing nozzle and the jacking pipe section 1 are arranged in the opposite direction; the soil body cut by the high-pressure rotary jet is assisted by hydraulic flushing to the starting working well 6 .

The construction method of the rotary jet jacking construction structure described in the present utility model comprises the following steps:

Step 1: During the prefabrication construction of the first pipe section 1.1, the pre-embedded steel plate 2 is set up, and the pre-embedded steel plate 2 is extended to a certain length, so that the rotary nozzle 3 is located inside the steel plate, and the pipe diameter will not be cut to the outer soil.

Step 2: Weld the fulcrum at the inner part of the pre-embedded steel plate 2 at the inner side of the first section 1.1 of the jacking section, and connect and fix the rotating nozzle fixing frame 4;

Step 3: Install the fixed swirl nozzle 3 and connect the swirl nozzle 5 at the same time;

Step 4: After the jacking construction starts, the high-pressure water vapor delivered by the rotary nozzle 3 through the rotary nozzle 5 realizes the cutting of the soil on the excavation face, and the cut soil is carried away by the water flow; the jacking pipe section 1 Advance under the action of top thrust;

Step 5: Repeat steps 1 to 4 until the construction of the underground pipe culvert or tunnel is completed.

Further, in step 4, the high-pressure flushing nozzle 1.3 sprays high-pressure flushing water to take away the cut soil.

The construction method of the rotary jet jacking construction structure of the utility model is a brand-new tunnel construction method which applies the rotary jet technology to the jacking construction, and has the advantages of simple operation, high efficiency and convenient construction.

In order to be able to more clearly illustrate the advantages of the rotary jet jacking construction structure described in the present invention compared with the prior art, the staff compared these two technical solutions, and the comparison results are as follows:

As can be seen from the above table, compared with the prior art, the rotary jet jacking construction structure of the present invention has strong applicability (applicable to the construction of various urban pipe culverts and tunnels), low construction difficulty, easy operation, and low construction cost. low and high construction efficiency.

Other unexplained parts belong to the prior art.

Claims (5)

1. The utility model provides a spout soon and push away construction structures, includes top push pipe coupling (1), its characterized in that: the rotary spraying device also comprises an embedded steel plate (2), a rotary spraying head (3), a rotary spraying head fixing frame (4) and a rotary spraying pipe (5);

the pushing pipe joint (1) comprises a pushing first pipe section (1.1) and a common pipe joint (1.2) connected to the rear of the pushing first pipe section (1.1);

the pre-buried steel plate (2) is positioned at the front end of the pushing first-section pipe section (1.1);

the rotary spray nozzle fixing frame (4) is welded on the inner side of the embedded steel plate (2);

the rotary spray head (3) is arranged on the rotary spray head fixing frame (4) and is positioned on the inner side of the embedded steel plate (2);

the rotary spray head (3) is connected with the rotary spray pipe (5).

2. The jet grouting and pushing construction structure according to claim 1, wherein: the rotary spray head (3) is a high-pressure rotary spray head; the number of the rotary spray heads (3) is multiple.

3. The jet grouting and pushing construction structure according to claim 2, wherein: the rotary spray head (3) is vertical to the pushing pipe joint (1) and/or vertical to the excavation face.

4. The jet grouting jacking construction structure according to claim 3, wherein: the embedded steel plate (2) extends out of the front end of the first section of pipe section (1.1) to push for a certain length.

5. The jet grouting jacking construction structure according to claim 4, wherein: the rotary spray pipe (5) is arranged in the pushing pipe joint (1).

Images