KR101364805B1 - Underground structure construction method with unit wall block - Google Patents

Abstract

The present invention relates to an underground structure in the form of a box and a ramen bridge using a unit block wall, and a construction method thereof. The construction of the underground structure is easy and a method using a precast or prestress member is constructed to construct a sidewall member having a temporary earth wall function. After the construction of the upper cover plate, and then to complete the ground early, the purpose of the rapid construction of underground structures to excavate and build inside. In the underground structure construction method using the unit block wall according to the present invention, the unit walls are connected in a row in a symmetrical alternating manner, the unit block wall combined with the steel support hole at a predetermined interval in the ground and the upper surface on both sides A first step of inserting the same or protruding from the ground; A second step of installing an upper cover plate at a height corresponding to an upper end of the unit block wall; Attaching a ground reinforcing mat to the upper and side surfaces of the upper cover plate and covering the ground to allow vehicles and people to pass; Ground excavation of soil between the unit block walls to a depth where vehicles and / or people can pass; A fifth step of stopping the ground after the soil is removed; A sixth step of bending the reinforcement at an appropriate angle and overlapping the bottom plate; A seventh step of constructing a lower bottom plate by integrally attaching the reinforcing material bent in the sixth step after casting the discarded concrete on the stationary ground; After the fifth step is an eighth step of attaching the sealing material to the joint of the unit block wall to strengthen the waterproof function.

Description

Unit block wall underground structure and construction method {UNDERGROUND STRUCTURE CONSTRUCTION METHOD WITH UNIT WALL BLOCK}

The present invention relates to an underground structure using a unit block wall, and more particularly, to form an underground structure by integrating an upper cover plate and a lower unit block wall of a precast concrete or prestressed concrete type, and covering the upper part of the upper part directly. The present invention relates to underground structures and construction methods for excavating and constructing soils between lower unit block walls after resuming traffic of vehicles and people.

In general, the underground structure is constructed in the form of a box or ramen bridge. Especially, the ramen bridge is a bridge in which the ramen structure is constructed in the main replacement, and the normal bridge has an upper structure and a substructure supporting it. It is an integral part of the body, and its mechanical properties are similar to those of arch bridges. There are various types according to the structure of the branch, and there are special ones such as a continuous ramen bridge or a box bridge connecting several spans into one.

Such a structure is a type of bridge in which the superstructure and undercarriage of the bridge are consolidated into one, thereby increasing the rigidity of the entire structure and simultaneously reducing the magnitude of the bending moment occurring in the ground. Such a structure is a bridge that is commonly used in cross-section overpasses and small rivers, and is a structure commonly seen in the vicinity.

In other words, the prior art construction is inconvenient and difficult to install a large number of formwork and dongbari in the field, and the indirect construction cost as well as the direct construction cost increases because the long-term use of the ridge and formwork and upper traffic must be controlled for a long time. And there is a drawback that the length of one span can only be constructed.

Patent Registration No. 10-1025019

Accordingly, the present invention is to solve the above problems, to allow the unit wall block and the unit upper cover plate to be integrally constructed, to cover the upper part as soon as possible to facilitate the flow of traffic, and to minimize the construction cost It is an object of the present invention to provide an underground structure using a unit block wall and a construction method thereof.

As described above, the present invention provides an underground structure using unit block walls and a method of constructing the same, in which unit walls are alternately arranged in a row in a symmetrical manner, and unit blocks are combined with steel support holes in the ground. A first step of inserting and installing the upper portion to be equal to the ground or protruding from the ground to both sides; A second step of installing an upper cover plate at a height corresponding to an upper end of the unit block wall; Attaching a ground reinforcing mat to the upper and side surfaces of the upper cover plate and covering the ground to allow vehicles and people to pass; Ground excavation of soil between the unit block walls to a depth where vehicles and / or people can pass; A fifth step of stopping the ground after the soil is removed; A sixth step of bending the reinforcement at an appropriate angle and overlapping the bottom plate; A seventh step of constructing a lower bottom plate by integrally attaching the reinforcing material bent in the sixth step after casting the discarded concrete on the stationary ground; And an eighth step of attaching a sealing material to the joint of the unit block wall after the fifth step to strengthen the waterproof function.

According to the underground structure using the unit wall block and the construction method according to the present invention, after the rapid construction integrally using the unit wall block and the upper cover plate of the precast form, the soil of the upper part and the top of the vehicle and By reconstructing traffic such as people, excavating the earth and sand between the unit wall block and the upper cover plate, and constructing the structure, it is possible to solve the traffic congestion caused by the construction of the underground structure and thereby reduce the indirect construction cost.

In addition, it is possible to simplify the process and increase the economic efficiency of underground construction by using the construction of the underground structure using the rapid construction of underground structures using unit wall blocks in the form of precast or prestressed concrete.

1 is a perspective view showing the overall assembly state of the unit block wall underground structure,
2 is an exploded perspective view of a unit block wall underground structure assembly;
3 is a perspective view showing the main structure of the unit block wall;
4 shows an application example of a protective sheet of a unit block wall;
5 is a fixing means application example,
6 shows an example of applying the ground reinforcing mat.

The underground structure using the unit block wall in the form of precast or prestressed concrete according to the present invention is composed of a wall, an upper portion, and a lower portion, wherein the wall is a unit block wall 100, an upper portion is an upper cover plate 200, and a lower portion is a lower portion. It may be referred to as the bottom plate (300).

The unit block wall 100 and the upper cover plate 200 is constructed by being integrated in a ramen or box form without being separated.

After the upper cover plate 200 is integrally constructed with the unit block separate body 100, the ground reinforcing mat 400 is installed on the top and side surfaces of the upper cover plate 200, and the ground reinforcing mat 400 is fixed. It is integrated with the structure by a separate fixing ring 410 or a fixing bar 420.

The ground reinforcement mat 400 is fixed to one end of the top end of the unit block wall or the lower end of the upper cover plate 200, and covers the earth and sand on the ground reinforcement mat 400, and compactly compacts using a compaction mechanism. do.

Ground reinforcement mat (400) and soil reinforcement and compaction construction is constructed by repeatedly constructing the planned road surface. Such a process functions to prevent ground subsidence by repeatedly performing a work of stacking soil to be ground on the ground reinforcement mat 400.

The ground reinforcing mat 400 is a method of constructing a composite rigid layer using geogrids and restraining members on the road. The ground reinforcing mat 400 prevents the collapse of the pavement due to an earthquake and suppresses the occurrence of cracks and steps on the asphalt pavement. do. Therefore, the ground reinforcement mat 400 is able to pass emergency vehicles, etc. immediately after the earthquake, so that it is possible to start responding to lifeguards or rescuers.

The ground reinforcing mat 400 is easy to install the geogrid and installation of the restraint member, and only expose the composite rigid layer on the road, it can be constructed in a short time. In addition, it is easy to dismantle, reuse of used granular materials, and construction cost is low.

The main function of the ground reinforcing mat 400 is to prevent the collapse of the cut and fill boundary, to suppress the occurrence and step of the structure before and after or buried, and to prevent floating settlement of the soft ground fill and cut boundary.

The unit block wall 100 is integrally constructed by inserting the steel support hole 500 therein, and is damaged when the unit block wall 100 is inserted into the ground at the boundary between the unit block wall 100 and the steel support hole 500. The reinforcement member 130 is installed to be integrated to prevent the case in advance.

A reinforcement member 130 is installed at the bottom of the unit block wall 100 to facilitate ground entry and to protect the unit block wall 100. The protection sheet is connected to the reinforcement member 130 and attached to the unit block wall. Attach 140.

The protective sheet 140 attached to the unit block wall 100 is divided into an inner sheet 150 and an outer sheet 170, and a reinforcement 160 is formed between the inner sheet 150 and the outer sheet 170. In addition, the reinforcement is formed of a rod-shaped rod made of a composite material such as reinforcing steel or steel or aramid and a grid made of steel wire mesh or composite material of a mesh form.

A cutout portion 151 is formed on a predetermined surface of the inner sheet 150 to enable cutting.

The reinforcement 160 may be bent to overlap the connection portion 310 for the lower bottom plate 300 after cutting the inner sheet 150, and the bent reinforcement 160 may be integrally formed with the lower bottom plate 300. do.

2 to 3, the unit block wall 100 is a composite wall of concrete and steel is composed of H-Pile, sheet pile and steel pipe pile.

An elastic material 600 is installed between the unit block wall 100 and the surface on which the upper cover plate 200 is attached.

Rubber and polyurethane are used as the main constituent materials of the elastic member 600, and the elastic member 600 includes a general pad composed of pure unit materials and one or more reinforcing plates for rigid reinforcement inserted into the elastic member and integrated therein. It consists of a composite pad. The reinforcement plate uses a thin steel sheet or a composite sheet.

The unit block wall 100 has a rectangular shape in which the horizontal length L is shorter than the vertical length H, and one or more steel support balls 500 are installed therein, and the number of installation of the steel support holes 500 is determined by The number depends on the horizontal bearing capacity.

One or more continuous unit block walls 100 are connected to each other to form a recess 120 for constituting the continuous underground wall part 110. The concave portion 120 may have a concave-convex portion 120 having various shapes such as a concave-convex shape, an arc shape, and a quadrangle.

To the side and end of the groove portion 120 to reduce the vertical impact force when the unit block wall 100 is approached, an elastic sheet made of a rubber-like material is attached for the purpose of waterproofing, etc., the lower end of the groove portion 120 An impact buffer 125 is installed, in which rubber or polyurethane is the main material.

The upper surface of the unit block wall 100 is an insertion groove 610 is formed so that the elastic material 600 can be inserted, the vertical fastening hole 710 for penetrating the elastic material and fastening the upper cover plate 200 Is formed.

Fixing means 700 for connecting the unit block wall 100 and the upper cover plate 200 is configured. Here, the fixing means 700 includes a vertical fastening hole 710, the means is inserted into the anchor bar 720 or dowel bar, which is a kind of threaded bolt and nut, the sheath pipe pre-buried in the cable There is a way to connect and tension from the outside.

Connection means 800 are installed to interconnect the unit block walls 100 in close contact with each other and continuously adjacent to each other. One or more horizontal fastening holes 810 are installed on the side of the unit block wall 100 to integrate the unit block walls continuously, and are inserted into the horizontal fastening holes 810 to allow the unit block walls to be integrated. 820 and a fixing bar 830 are installed and fixed. Specifically, the connecting means 800 can be performed in the same manner as the fixing means 700.

On one surface of the steel support hole 500 integrated with the unit block wall 100, a steel support hole 500 is formed by bending a corrugated steel sheet having many small holes. As the type of the steel support 500, the corrugated bending steel plate 510, the steel hole tube 520, etc. may be used. Steel support ball 500 is integrally attached to the unit block wall 100 is possible to improve the ground through groundwater drainage and ground grouting in the soft ground.

The upper cover plate 200 is pre-fabricated in a separate workshop in the form of prestressed concrete 210 or precast concrete 220. Both ends of the upper cover plate 200 attached to the unit block wall 100 are provided with vertical fastening holes 710 formed to be coupled to the unit block wall 100, and the vertical fastening holes 710 are threaded. It is coupled by the fixing means 700 by the fastening of the formed anchor bar 720 and the nut. In addition, other fastening means, such as a dowel bar, a stressing method.

The upper outer periphery and the inner surface of the vertical fastening hole 710 is integrally built with the grouting material (1000).

The underground structure construction method using the unit block wall according to the present invention is as follows.

(S10) Unit Block Wall Installation

Once the location and the ground of the underground structure is determined, the unit block wall 100 is installed at both ends of the ground.

Since the unit block wall 100 can be supported in the ground by H-pile, steel pipe pile and sheet pile, the length of the pile is formed longer than the unit block wall beam 100 and the pile and unit block wall 100 Secure each other so that the tops of them match. Therefore, the lower portion of the pile will be disposed below the lower portion of the unit block wall 100, and the unit block wall 100 is embedded until a portion of the pile is inserted into the ground.

Installation units of the unit block wall 100 are installed in different numbers depending on the space and passage space or span.

For example, when the underground space of the underground structure is two spans, the unit block walls 100 may be installed on both sides facing each other, and two unit block walls 100 may be installed in the middle thereof.

For the construction of the unit block wall 100, to prevent the rolling of the unit block wall 100 can be formed front shear 23, otherwise the unit block wall 100 may be provided in a plurality of rows to ensure rigidity have.

In the case where the unit block wall 100 is continuously buried in the ground, the unit block wall 100 is integrally connected through the horizontal connecting means 800 so as to connect the unit block wall 100 continuously.

When the unit block wall 100 is embedded in a single or plural rows to the design depth, the head of the unit block wall 100 is arranged, and an elastic material is installed in the elastic member 600 installation groove.

(S20) Top cover plate installation

The upper cover plate 200 is installed between the unit block walls 100 at a height corresponding to the upper end of the unit block wall.

After the upper cover plate 200 is installed on the unit block wall 100, the fixing unit is installed in advance on the unit block wall 100 and the upper cover plate 200 to integrate with the unit block wall 100. The anchor bolt and thread formed in the anchor bolt and nut or prestressing method such as prestressing method is integrated into one.

(S30) Ground reinforcement mat (400) installation and cover

The ground reinforcing mat 400 is attached to the upper and side surfaces of the upper cover plate 200, and the soil is covered to cover the soil in parallel with the existing ground surface so that vehicles and people can pass.

The ground reinforcing mat 400 is installed at the lowermost, middle and top ends of the unit block wall 100 or the upper cover plate 200 for each position, and the ground reinforcing mat 400 is installed at each position. The soil is filled to a certain thickness, and compacted repeatedly using compaction equipment.

Geogrid 430, a wire mesh 450, a mesh 460 using a composite material, etc. are used as the type of the ground reinforcing mat 400, and the ground reinforcing mat 400 is fixed using the restraining member 440. .

(S40) Ground Excavation

After the upper ground is covered, the ground excavation between the unit block wall 100 and the upper cover plate 200 inserted into the ground at a predetermined interval in the first step S10 is ground excavated to a depth where vehicles and people can pass ( 900).

When excavating the ground between the unit block wall 100 and the upper cover plate 200, excavation and construction using various excavation equipment.

(S50) Ground stop

After the soil was removed between the unit block wall 100 on both sides by the ground excavation (S40) step, the soil and foreign substances attached to one surface of the unit block wall 100 are removed, and the ground is stopped.

(S60) Internal Stiffener Deformation

Cut along the cutout 151 of the inner sheet 150 attached to one surface of the unit block wall 100 from which soil is removed by the ground stopping step S50, and bending the internal reinforcement 160 at an appropriate angle. To overlap with the lower bottom plate 500.

(S70) lower bottom plate (500) construction

After placing concrete on the ground which has been ground ground, the lower bottom plate 500 is constructed by integrally attaching with the reinforcement 160 bent in the step of attaching the internal reinforcement.

The lower bottom plate 500 may be manufactured by in-situ placing and curing concrete after reinforcement in the field.

In addition, it is possible to produce a lower bottom plate 500 manufactured by a precast concrete method manufactured separately in the field near the production site as in the upper cover plate 200.

(S80) finish

The sealing material 1100 is attached to the joints 1000 such as the unit block wall 100 and the upper cover plate 200 to strengthen the waterproof function.

10 passage spaces
100 unit block wall
110 continuous underground wall section
120 groove
130 reinforcing members
140 protective sheet
150 inner sheets
160 reinforcement
170 outer sheets
200 top cover plate
210 prestressed concrete
220 precast concrete
300 bottom plate
310 connection
400 Ground Reinforcement Mat
500 Steel Jibo
510 corrugated steel sheet
600 elastic
610 groove
700 Settlement Means
710 vertical fasteners
720 anchor bar
800 connections
810 Horizontal Fastener
900 Ground Excavation
1000 grouting material

Claims (11)

1. A unit block wall (100) installed to form a continuous underground wall portion (110) on both sides of the ground, and entering in a predetermined depth;
   An upper cover plate 200 is formed on an upper end of the unit block wall 100;
   A lower bottom plate 300 is formed at a lower end of the unit block wall 100;
   A ground reinforcing mat 400 attached to the upper and side surfaces of the upper cover plate 200 is installed;
   The steel support hole 500 coupled to the unit block wall 100 and inserted into the ground to support horizontal and vertical support functions and an insertion groove 610 formed on the upper surface of the unit block wall 100 are elastic members in the insertion groove. 600 is installed;
   In order to integrate the unit block wall 100, the upper cover plate 200 and the elastic member 600, a fixing means 700 is formed to form a vertical fastening hole 710 to be coupled to each other;
   Unit block wall underground structure, characterized in that the connecting means 800 is formed with a horizontal fastening hole (810) for interconnecting and unifying the unit block wall 100 in close contact with each other in continuous contact with each other.
   
2. The method according to claim 1,
   The unit block wall 100 has at least one steel support hole 500 is installed therein, and on both sides of the unit block wall 100 to connect adjacent unit block walls to each other to form a continuous underground wall unit 110 The lower end of the groove portion 120 and the groove portion 120 is configured with a shock absorber 125 for buffering the vertical impact force of the unit block wall 100, the bottom of the unit block wall 100 is easy to enter the ground And a reinforcing member 130 for protecting the unit block wall 100 is installed, and is connected to the reinforcing member 130 and attached to the protection sheet 140 attached to the unit block wall. Underground structure.
   
3. The method according to any one of claims 1 to 2,
   An induction hole such as a corrugated bending steel plate 510 having a hole drilled in one surface of the steel support hole 500 is integrally attached to the steel support hole 500 or the unit block wall 100 to guide the groundwater induction drainage in the soft ground through the induction hole. And unit block wall underground structure, characterized in that it is possible to improve the soft ground through ground grouting.
   
4. The method according to claim 1,
   The upper cover plate 200 is pre-fabricated in a separate workshop in the form of prestressed concrete 210 or precast concrete 220, symmetrical with each other in the upper cover plate 200 and the unit block wall 100 is attached to Vertical fastening holes 710 are formed in both end surfaces to be coupled to the unit block wall 100, and the vertical fastening holes 710 are anchoring means composed of a threaded anchor bar 720 or a dowel bar. 700 is coupled to, the unit block wall underground structure, characterized in that the outer periphery and the inside of the vertical flat fastening hole 710 is fixed by the fixing means 700 and then filled with the grouting material (1000).
   
5. The method according to claim 1 or 2,
   The protective sheet 140 attached to the unit block wall 100 is divided into an inner sheet 150 and an outer sheet 170, and a reinforcement member having a rod or grid shape between the inner sheet 150 and the outer sheet 170. 160 is provided, the cutting portion 151 is formed on a predetermined surface of the inner sheet 150 is possible to cut, the reinforcing material 160 is the lower bottom plate 300 after cutting the inner sheet 150 It is possible to be folded to overlap the connecting portion 310, the bent reinforcement 160 is a unit block wall underground structure, characterized in that formed integrally with the lower bottom plate (300).
   
6. In the construction method of the unit block wall underground structure of claim 1,
   A first step (S10) of inserting the unit block wall 100 into the ground such that the upper portion is equal to the ground or protrudes from the ground at both sides at a predetermined interval in the ground;
   A second step (S20) of installing the upper cover plate 200 at a height corresponding to an upper end of the unit block wall 100 installed by the first step (S10);
   The ground reinforcing mat 400 is attached to the upper and side surfaces of the upper cover plate 200 installed by the second step (S20), and the soil is covered again to cover the soil in parallel with the existing ground surface so that vehicles and people can pass. A third step S30 to be performed;
   After the upper ground is covered by the third step S30, the fourth step of ground excavation 900 between the unit block wall 100 and the upper cover plate 200 to a depth at which a vehicle and a person can pass. (S40);
   After the soil is removed between the unit block wall 100 on both sides by the fourth step S40, the soil and foreign substances attached to one surface of the unit block wall 100 are removed, and the fifth step of stopping the ground (S50). );
   Cut along the cutout 151 of the inner sheet 150 attached to the unit block wall 100 from which the soil is removed by the fifth step S50, and the reinforcement 160 is bent at an appropriate angle to lower the bottom. Sixth step (S60) to be overlapping with the plate 300;
   The seventh step (S70) of constructing the lower bottom plate 300 by attaching integrally with the reinforcing material 160 bent in the sixth step (S60) after the discarded concrete in the ground suspended in the fifth step (S50) );
   The unit block is installed in the eighth step (S80) to strengthen the waterproof function by attaching a sealing material to the joints of the unit block wall 100 and the upper cover plate 200 after the fifth step (S50). Construction method of wall underground structure.
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