KR102621084B1 - Movable excavation temporary shelter and underground structure construction method using the same - Google Patents

Abstract

The present invention includes a main body that is inserted into the ground and covers the upper and side parts in the excavation direction so that the internal ground can be excavated while resisting external forces such as earth pressure; and a mobile excavation shelter including an inclined front end formed at the front of the main body and shortened in length from the top to the bottom.

Description

Mobile excavation shelter and underground structure construction method using the same {MOVABLE EXCAVATION TEMPORARY SHELTER AND UNDERGROUND STRUCTURE CONSTRUCTION METHOD USING THE SAME}

The present invention relates to technology related to a mobile excavation shelter and a method of constructing an underground structure using the same.

The ground must be excavated or excavated to pass under a subway, underground road, underground intersection, underground sidewalk, or railroad or road.

The cut and cover method of excavating the ground means that ground transportation cannot be used during construction, many civil complaints are filed, and construction costs are also very expensive.

Trenchless ground construction methods include Pipe Roof, TRCM (Tubular Roof construction Method), NTR (New Tubular Roof Method), DSM (Diveded Segment Method), NATM (New　Austrian　Tunneling　Method), TBM (Tunnel Boring Machine) There are construction methods such as Method), but these construction methods also have problems in that the construction method is complicated and difficult, the construction period is long, and the cost is high.

Accordingly, the inventor of the present invention completed the present invention after a long period of research and trial and error in order to improve the construction method of underground structures.

The present invention aims to provide a mobile excavation shelter and a method of constructing an underground structure using the same, which can exclude the influence of ground traffic during underground structure construction, can significantly reduce construction costs compared to competing construction methods, and minimize underground earthwork flow. do.

Meanwhile, other unspecified purposes of the present invention will be additionally considered within the scope that can be easily inferred from the following detailed description and its effects.

According to an embodiment of the present invention, a main body that is inserted into the ground and covers the upper and side parts in the excavation direction so that the internal ground can be excavated while resisting external forces such as earth pressure; and

The object is to provide a mobile excavation shelter including an inclined front end formed at the front of the main body and shortened in length from the top to the bottom.

According to one embodiment of the present invention, a propulsion jack coupled to the main body to provide propulsion to move the main body may be further included.

According to one embodiment of the present invention, the propulsion jack is,

A plurality may be formed on both sides of the main body in the height direction.

According to one embodiment of the present invention, the front end may further include a pointed crown portion.

According to one embodiment of the present invention, it is formed at the rear end of the main body and may include an inclined rear end whose length becomes shorter from the top to the bottom.

According to one embodiment of the present invention, the rear end is,

It may further include a grouting injection part or a concrete pouring part to fill voids in the ground caused by the forward movement of the main body.

According to an embodiment of the present invention, a rotation means coupled to the lower part of the main body to facilitate movement of the main body may be further included.

According to an embodiment of the present invention, a forward step of inserting a mobile excavation shelter into the ground and advancing it;

An excavation step of excavating the inside of the mobile excavation shelter;

Includes a construction system that constructs underground structures in the excavated space,

The mobile excavation shelter,

A main body that is inserted into the ground and covers the upper and side parts in the excavation direction so that the internal ground can be excavated while resisting external forces such as earth pressure; and

A method of constructing an underground structure can be provided, which is formed at the front end of the main body and includes an inclined front end part whose length becomes shorter from the top to the bottom.

*According to one embodiment of the present invention, the advancing step is,

It may include a process of reinforcing the rear cavity due to movement of the mobile excavation shelter by grouting or poured concrete.

According to one embodiment of the present invention, the advancing step is,

It may include the process of advancing to the ground using a propulsion jack coupled to the mobile excavation shelter while supporting it on a fixed reaction stand.

According to one embodiment of the present invention, the advancing step is,

In order to improve excavability and secure support, a roller is included in the lower part of the mobile excavation shelter, and the roller can move the upper surface of the line-reinforced foundation block.

According to an embodiment of the present invention, the mobile excavation shelter can be brought in from a starting base in the ground and taken out from a reaching base in the ground.

By using the mobile excavation shelter and the underground structure construction method using the same according to the present invention, the influence of ground traffic during underground structure construction can be excluded, construction costs can be significantly reduced compared to the cut-and-cover method, and underground earthwork flow can be minimized. there is.

Meanwhile, it is to be added that even if the effects are not explicitly mentioned herein, the effects described in the following specification and their potential effects expected from the technical features of the present invention are treated as if described in the specification of the present invention.

Figure 1 is a diagram showing a mobile excavation temporary shelter according to the present invention.
Figure 2 shows the operation of the propulsion jack for the mobile excavation shelter according to the present invention to move forward.
Figure 3 is a view showing the front and rear cross sections of the mobile excavation shelter according to the present invention.
Figure 4 is a diagram for explaining the actual forward movement of the mobile excavation shelter according to the present invention on the ground.
Figure 5 is a diagram showing that the propulsion jack of the mobile excavation construction shelter according to the present invention moves the mobile excavation construction shelter forward while supporting the underground structure.
Figure 6 is a diagram showing reinforcement grouting in progress at the rear of the mobile excavation shelter according to the present invention.
Figures 7 to 10 relate to a method of constructing an underground structure using the backfill method.
The attached drawings are intended as reference for understanding the technical idea of the present invention, and are not intended to limit the scope of the present invention.

In describing the present invention, if it is determined that related known functions may unnecessarily obscure the gist of the present invention as they are obvious to those skilled in the art, the detailed description thereof will be omitted.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments of the mobile excavation shelter and the underground structure construction method using the same according to the present invention will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical or corresponding components are shown in the same drawings. Numbers will be assigned and duplicate explanations will be omitted.

The mobile excavation temporary shelter according to the present invention must be excavated underground when constructing an underground structure for a self-loading road such as an intersection, an underground crossing connecting passage, or an underground railroad or road, etc., and is inserted into the ground during underground excavation to exert earth pressure. This is to facilitate excavation from the inside by resisting external forces such as the like.

That is, when excavating the ground using an excavator, etc., a mobile excavation temporary shelter is first inserted, and the upper and side parts in the excavation direction are covered and supported to facilitate ground excavation.

In order to excavate the ground using a mobile excavation shelter, it is desirable that the ground be composed of soil or reefing rock. Prior to ground excavation using an excavator, etc., a mobile excavation shelter is first inserted into the ground and ground excavation is carried out while supporting earth pressure.

After ground excavation is completed, underground structures are constructed sequentially starting from the shaft. In addition, by supporting the underground structure being constructed and allowing the mobile excavation shelter to move forward, the excavation of the ground and the construction of the underground structure are carried out in conjunction with each other.

By excavating the ground through this construction method, the influence of ground traffic during construction can be excluded, and the mobile excavation shelter can be recycled by being brought in from the starting base in the ground and taken out from the arriving base, so it can be said to be very economical. Furthermore, by securing a construction capacity of 1 to 2 km per year, the construction period reduction effect is also excellent, and the flow of earthworks can be minimized by using the front excavated soil as backfill.

Below, we will explain in detail this mobile excavation shelter and the underground structure construction method using it.

Figure 1 is a diagram showing a mobile excavation temporary shelter according to the present invention.

As shown in Figure 1, the mobile excavation shelter 10 according to the present invention includes a main body 100 and an inclined front end portion 110.

The main body 100 is inserted into the ground (S) to resist external forces such as earth pressure and is formed to cover the top and sides in the excavation direction. Excavation can proceed from the inside while the main body 100 is inserted into the ground (S) and supports external earth pressure, etc.

Accordingly, the main body 100 is configured to be able to resist external forces such as earth pressure, suppress ground (S) displacement to a minimum, and secure ground (S) bearing capacity at the foundation surface.

The main body 100 is formed to have an arch-shaped structure (semicircular structure) when viewed from the front, so that it can be more smoothly inserted into the ground (S) and can facilitate the formation of an underground structure therein.

The main body 100 has an inclined front end 110 coupled to the front end of the main body 100 so that it can be easily inserted into the ground (S). That is, the inclined front end 110 is formed at the front end of the main body 100 and is formed to become shorter from the top to the bottom when viewed from the side, so that it has an inclination angle, thereby reducing resistance to the ground (S) when inserted into the ground (S). Insertion may become easier.

In addition, the front end 110 of the main body 100 may include a water jet or a rotary saw capable of cutting the front ground (S) to facilitate insertion of the main body 100 into the ground (S).

That is, before the main body 100 moves forward between the ground (S), the front ground (S) is cut using a water jet or a rotating saw, so that the main body 100 can easily move forward between the ground (S). The waterjet sprays high-pressure water (W) onto the ground (S) to cut the ground (S), and the rotating saw also rotates to cut the ground (S). Other ground (S) equivalent to a waterjet or rotating saw It is obvious that a cutting device can be applied to the present invention.

The driving force that causes the main body 100 to move forward between the ground (S) may be achieved by the propulsion jack 130 that is coupled to the main body 100 and provides driving force to the main body 100. The propulsion jack 130 may include a hydraulic cylinder, etc., and the main body 100 can be inserted into the ground (S) and move forward by the driving force caused by the piston movement of the hydraulic cylinder.

Meanwhile, the inclined front end portion 110 of the main body 100, which is formed to facilitate insertion of the main body 100, may further include a tip crown portion 170 that is sharply formed to facilitate easier insertion. It becomes easier for the main body 100 to be inserted into the ground (S) through this sharply formed tip crown portion 170.

At this time, a water jet or rotary saw may be coupled to the front end of the cutting edge crown portion 170.

The present invention may further include an inclined rear end portion 140 at the rear end of the main body 100. The inclined rear end 140 is formed at the rear end of the main body 100 so that its length becomes shorter from the top to the bottom.

The inclination angle of the inclined rear end may be formed to be the same as that of the inclined front end. At this time, the slope angle may be formed equal to the ground slope angle. In other words, it may be the same as the slope angle maintained by the soil slope.

This configuration of the inclined rear end 140 means that the upper earth pressure is supported by the upper end of the inclined rear end 140, and excavation, etc., is possible at the lower part. That is, through the configuration of the inclined rear end 140, excavation can be carried out in a structure smaller than the main body 100 composed of a barrel, thereby greatly improving the cost-effectiveness of the main body 100.

Meanwhile, this inclined rear end 140 may further include a grouting injection unit 150 for injecting cement or concrete, etc. to fill the void between the ground (S) generated by the forward movement of the main body 100. .

That is, the grouting injection unit 150 supplies cement or concrete, etc. to the gap in the ground (S) where the main body 100 moves forward. Through this, construction work on the underground structure can proceed without the ground (S) collapsing.

The lower part of the main body 100 may further include a rotation means 160. This rotation means 160 is coupled to the lower part of the main body 100, so that the main body 100 can be moved more easily. The rotation means 160 may be made of a roller or the like.

The inclined front end 110 coupled to the front end of the main body 100 is inserted into the ground (S), and then the ground (S) is excavated using an excavator (P), etc., and at this time, the lower part of the main body 100 is inserted into the ground (S). In order to facilitate movement of the lower part, a foundation block (B) for excavation can be formed. When the upper part of the foundation block (B) formed in the lower part of the excavated ground (S) is rotated and entered into the lower part of the main body (100), the main body (100) can be more easily inserted into the ground (S). You can.

This is made possible through the configuration of the inclined front end portion 110 formed at the front end of the main body 100. That is, since the inclined front end 110 moves ahead of the lower part of the main body in the ground (S), it moves forward and then excavates to the lower part, and forms a basic block (B) for excavation in the excavated space, so that the roller The rotation means, such as the back, can move on the above-described excavation basic block (B).

When the main body 100 advances in this way, the inclined front end 110 is inserted into the ground (S) ahead of the main body 100, and when the lower part is excavated, a basic block for excavation (B) is placed on the way of the main body 100. ) can also be formed. The foundation block (B) for excavation is pre-strengthened through grouting, etc. Since the rotating means 160, such as a roller, can move forward while rotating on the foundation block for excavation (B), it becomes easier for the mobile excavation shelter (10) according to the present invention to move forward on the ground (S).

Figure 2 shows the operation of the propulsion jack 130 for the mobile excavation shelter 10 according to the present invention to move forward.

As shown in Figure 2, the main body 100 can sequentially move forward while supporting the underground structure (H) constructed in the excavated space. As shown in FIG. 2, the propulsion jack 130 moves a distance of D1 while supporting the reaction arm (R), and then supports the underground structure (H) to be constructed to move D2, D3, D4, D5, D6, You can move to D7.

The details are as follows.

In order for the main body 100 to move forward on the ground (S), a driving force is needed to move the main body 100 in the excavation direction. In order for the main body 100 to be inserted into the ground (S), a reaction arm (R) to support the propulsion jack 130 is required. The main body 100 may be inserted into the ground (S) through the force of the propulsion jack 130 coupled to the main body 100 pushing the reaction arm (R). That is, when the propulsion jack 130 pushes the fixed reaction arm (R), the force to insert the main body 100 into the ground (S) is provided by the action and reaction force.

The first movement of the main body 100 was due to the force pushing the reaction arm (R), but after the main body 100 moved forward on the ground (S), a box was constructed within the main body 100. The propulsion jack 130 can move forward while supporting the constructed box.

At this time, the box may be a box that is manufactured in advance and only installed on site, or it may be an underground structure (H) through PC or concrete casting. In this way, the propulsion jack 130 coupled to the main body 100 can provide propulsive force to the main body 100 while supporting the boxes that are sequentially constructed.

Figure 3 is a view showing the front and rear cross sections of the mobile excavation shelter 10 according to the present invention.

As shown in Figure 3, in front of the mobile excavation temporary shelter 10, the ground (S) is cut while spraying a water jet on the ground (S), and at the rear of the mobile excavation temporary shelter (10), the main body 100 The voids in the ground (S) created while moving are filled or filled through the grouting injection pipe.

Meanwhile, as shown in FIG. 3, a plurality of propulsion jacks 130 coupled to the main body 100 may be formed on both sides of the main body 100 in the height direction.

By forming the propulsion jacks 130 to the left and right in this way, it is possible to control the direction of movement of the main body 100 by controlling the driving force of the propulsion jacks 130 (adjusting the piston length). That is, if the piston of the right propulsion jack 130 is made longer, the main body 100 will be steered to the left, and conversely, if the piston of the left propulsion jack 130 is made longer, the main body 100 will be steered to the right. .

In addition, since a plurality of propulsion jacks 130 are formed in the height direction, when the length of the piston of the lower propulsion jack 130 is lengthened, the main body 100 moves upward, and conversely, the piston of the upper propulsion jack 130 moves upward. If the length is increased, the main body 100 can move downward.

Ultimately, it is possible to steer the main body 100 up, down, left and right by controlling the driving force of the propulsion jacks 130 formed on both sides and in the height direction of the main body 100.

Figure 4 is a diagram for explaining the actual forward movement of the mobile excavation temporary shelter 10 according to the present invention on the ground (S), and Figure 5 is a diagram showing the propulsion jack 130 of the mobile excavation temporary shelter 10 according to the present invention. ) is a diagram showing moving the mobile excavation shelter (10) forward while supporting the underground structure (H).

The propulsion jack 130 coupled to the main body 100 of the mobile excavation shelter 10 initially inserts the main body 100 into the ground (S) by the reaction force of the force applied by the reaction force (R), and then excavates. After applying force to the formed underground structure (H), it is inserted into the ground (S) by the reaction force.

Figure 4 shows the underground structure (H) being formed sequentially and the mobile excavation shelter (10) moving forward while supporting the formed underground structure (H).

In Figure 4, this is before the piston of the propulsion jack 130 is extended, and in Figure 5, the situation where the piston of the propulsion jack 130 is extended and pushing the underground structure (H) is depicted. In this way, there is a force that pushes the propulsion jack 130 against the underground structure (H), and the main body 100 moves forward due to the reaction force.

Figure 6 is a diagram showing reinforcement grouting in progress at the rear of the mobile excavation shelter 10 according to the present invention. A shaft shelter (G) may be formed in the shaft after the mobile excavation shelter (10) is inserted into the starting base of the ground (S). After the shaft shelter (G) is formed, the mobile excavation shelter (10) moves forward. While moving, the gap in the ground (S) between the shaft shelter (G) and the mobile tunnel shelter can be filled with grouting.

Meanwhile, a space exists between the mobile excavation shelter 10 and the underground structure (H), and this space can be backfilled with excavated soil generated during excavation. In other words, by using the front excavated soil for backfilling, it is possible to minimize the flow of the earthwork while recycling the excavated soil.

In this way, by filling the gap in the ground (S) between the shaft shelter (G) and the mobile excavation temporary shelter with grouting, it is possible to prevent the excavated ground (S) from collapsing.

When constructing an underground structure (H), when cultivating the lower slab of the underground structure (H), temporary crossing facilities may be further included for movement within the excavated space. Through these temporary crossing facilities, processes such as excavation, transport of excavated soil, and construction of underground structures (H) can be continuously carried out even while the lower slab is curing.

The underground structure (H) construction method according to the present invention includes a forward step of inserting the mobile excavation shelter (10) into the ground (S) and advancing it, while the mobile excavation shelter (10) resists earth pressure, etc. 10) It may include an excavation step of excavating the interior and a construction step of constructing an underground structure (H) in the excavated space.

That is, the mobile excavation shelter 10 is advanced and inserted into the ground (S), and then the inside of the mobile excavation shelter (10) is excavated using an excavator (P), etc., and then an underground structure (H) is installed in the excavated space. ) is completed sequentially and repeatedly to complete the underground structure (H).

At this time, the forward step includes a process of reinforcing the rear cavity through grouting as the mobile excavation shelter 10 moves. Through this grouting reinforcement process, it is possible to prevent the excavated internal space from collapsing during construction of the underground structure (H).

In addition, in the forward stage, the mobile excavation shelter (10) is initially moved forward by supporting the propulsion jack (130) on the fixed reaction stand (R), but later, the mobile excavation shelter (10) is supported by the underground structure (H) to be constructed. (10) moves forward on the ground (S).

On the other hand, this mobile excavation shelter 10 can be brought in from the starting base of the ground (S) and taken out from the arrival base of the ground (S) and reused, which is very economically advantageous.

At this time, the mobile excavation temporary shelter 10 uses the previously described mobile excavation temporary shelter 10, and detailed description will be omitted.

Figures 7 to 10 relate to a method of constructing an underground structure using the backfill method.

As shown in Figure 7, an underground structure (H) can be formed in the shape of a mobile excavation shelter (10). That is, the underground structure (H) may be formed in an oval or arch shape.

In this case, a gap as large as the mobile excavation shelter (10) may be formed between the underground structure (H) and the ground due to the forward movement of the mobile excavation shelter (10).

At this time, the concrete pouring unit 151 of the mobile excavation shelter 10 shown in FIG. 8 can inject backfill concrete (C) into these voids. Figure 9 shows the rear void between the underground structure (H) and the ground created by the mobile excavation shelter (10) moving when the concrete pouring part (151) of the mobile excavation shelter (10) pours the backfill concrete (C). It shows that the voids in the part have been filled.

Ultimately, as shown in FIG. 10, concrete (C) is poured into the void created by the mobile excavation shelter 10 moving forward, so that the forward movement of the mobile excavation shelter 10, the construction of the underground structure (H), and the void The process of pouring concrete into the part is carried out repeatedly.

The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the scope of protection of the present invention may not be limited due to changes or substitutions that are obvious in the technical field to which the present invention pertains.

10: Mobile excavation shelter
100: body
110: front end
130: Propulsion Jack
140: rear end
150: Grouting injection part
151: Concrete pouring part
160: Rotation means
170: Cutting edge crown part
C: Concrete
P: excavator
S: ground
B: Basic block
R: reaction arm
G: Shaft shelter
H: underground structure

Claims (4)

A main body that is inserted into the ground and covers the upper and side parts in the excavation direction so that the internal ground can be excavated while resisting external forces such as earth pressure; and
It is formed at the front end of the main body and includes an inclined front end part whose length becomes shorter from the top to the bottom,
It is formed at the rear end of the main body and includes an inclined rear end formed so that the length becomes shorter from the top to the bottom,
The rear end,
It further includes a grouting injection part or a concrete pouring part to fill the voids between the underground structure and the ground caused by the movement of the main body,
It further includes a propulsion jack coupled to the main body to provide propulsion to move the main body forward,
The propulsion jack moves the main body forward by the reaction force of the force applied to the reaction bar before the underground structure is formed, and moves the main body forward by the reaction force of the force applied to the underground structure after the underground structure is formed,
The propulsion jack is,
A plurality is formed on both sides of the main body in the height direction,
The front end further includes a pointed crown portion,
The front end,
Further comprising a water jet or rotary saw capable of cutting the ground ahead,
Characterized in that the slope angle of the inclined rear end is formed to be the same as the slope angle maintained by the soil slope,
Mobile excavation shelter. delete delete According to paragraph 1,
Characterized in that it further comprises a rotation means coupled to the lower part of the main body to facilitate movement of the main body.
Mobile excavation shelter.