JPH11323949A - Dewatering construction method and earth retaining timbering used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dewatering method capable of easily and quietly performing pumping pipe driving work performed to drain water in an excavating groove for laying a potable/sewage water pipe. SOLUTION: Plural building frames 5 are provided in a ledge 4, plural earth retaining timbering 1 sticking face plates 3 between both building frames 5 facing to the earth retaining side are buried in the earth in a vertical row state, a sheet pile 15 is driven along the outside surface of the respective face plates 3, and earth in the timbering is excavated and removed to form an excavating groove 16. Then, plural pumping pipes 10 are driven at an interval in the vertical row direction toward the bottom surface of the excavating groove 16 from the inside of the timbering 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage method for draining water flowing into a trench excavated for embedding a water pipe or a sewer pipe (hereinafter referred to as a water pipe, etc.) and a retaining method used therefor. For shoring.

[0002]

2. Description of the Related Art Normally, the work of burying water pipes or the like is performed by first digging a road, laying a water pipe after draining of the excavated trench is completed, and then backfilling the excavated trench with earth and sand. Complete. Conventionally, when draining water, the outside of the pumping tube with a well point at the lower end is covered with a protective tube that prevents clogging and deformation of the well point, and the pumping tube together with the protective tube is slightly away from the excavation groove. Along the location, it is driven into the ground at intervals, and after the protective tube is pulled out, the top of the pumping tube is connected to a collecting tube separately laid on the ground via a hose, and a pump connected to the collecting tube is used. The method of sucking water is common.

[0003] Most of the roads have asphalt laid on the ground. And, due to the hardness of the asphalt layer, it is difficult to drive the pumping pipe, and at the time of the operation, noise and vibrations are generated to break the asphalt, which gives discomfort to residents near the construction site. In addition, even on a road where no asphalt is laid, there is a similar problem under conditions where the soil near the ground surface is hard.

Further, since the pumping pipe is installed at a position slightly away from the excavation groove, it has been necessary to drive the excavation groove to nearly twice the depth of the excavation groove in order to drain the water. For example, when burying a water pipe or the like at a depth of 2 m, a drain pipe is inserted about 4 m.

[0005] Further, the water collecting pipe laid on the ground is one step higher than the road surface, so that not only the road width is narrowed, but also an obstacle when passing. Depending on road conditions, drainage pipes may be laid to block the entrance.
People with weak legs and people in wheelchairs have a great deal of trouble entering the house.

[0006]

The first object of the present invention is as follows.
An object of the invention described is to provide a drainage method capable of easily and quietly driving a pumping pipe.

It is an object of the present invention to provide a draining method that can use a road as wide as possible even during construction.

Another object of the present invention is to provide an earth retaining shoring which is used directly for carrying out the present invention.

[0009]

According to the first aspect of the present invention, a plurality of building frames are provided on a cloth frame and a plurality of face plates are attached between the two building frames facing the earth retaining side. Embankment for earth retaining is buried in the soil in a tandem state, a sheet pile is driven along the outer surface of each face plate, and the soil in the shoring is dug to form a digging groove. It is characterized in that a plurality of pumping pipes are cast toward the bottom face at intervals along the column direction.

[0010] Since the pumping pipe is driven from a previously dug groove, the driving depth is shorter than driving from the ground, and water is pumped from directly below the drill groove. In addition, the drainage efficiency is improved, and the lower end position of the pumping pipe is also increased (the filling depth of the pumping pipe is small).

Usually, a water pipe or the like is laid at the center of the bottom surface of the excavation groove. Therefore, the pumping pipe is cast on the side of the bottom surface of the excavation groove. If the amount of water that springs out into the digging trench is small, it is sufficient to drive the pumping pipes at intervals along one of the left and right sides of the bottom of the digging trench, and if the amount of water is large, Pumping pipes may be installed along both the left and right sides of the bottom of the excavation trench.

[0012] There is also a method of pouring water pumped up from the pumping pipe into a collecting pipe laid on the ground along a location slightly away from the excavation trench. The support works are provided in communication with the hollow cross members facing the earth retaining side of the adjacent cloth frame, and these cross members are interposed in the flow path connecting the pumping pipe and the pump installed on the ground,
The water pumped from the pumping pipe may be guided to the pump after passing through the crosspiece. In this way, there is no need to lay water collecting pipes on the ground.

[0013] Depending on the amount of water flowing into the excavation trench, water may flow through only one of the pair of cross members constituting the cloth frame, or water may flow through both of the pair of cross members.

According to a third aspect of the present invention, there is provided an earth retaining support in which a cloth frame is provided with a plurality of building frames and a face plate is attached between the two building frames facing the earth retaining side. Between both end portions of a pair of cross members facing the fastening side, each is formed by being erected in a state where a vertical member is sandwiched, the cross member is provided in a hollow, and further, in the cross member, a joint to a water pump pipe, And a joint portion to a cross member of an adjacent shoring is protruded.

The joint may project from the upper surface or the lower surface as long as it is the end of the cross member. Can be easily connected.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An earth retaining shoring 1 of the present invention has a structure in which a face plate 3 is adhered to an earth retaining surface side of a tower-like supporting main body 2 as shown in FIG. More specifically, the shoring main body 2 has a construction frame 5 suspended at each corner of the cloth frame 4 formed in a rectangular frame body, and an auxiliary material 6 is provided at an intermediate height of each construction frame 5. Provided in a frame shape, the lower part of each building frame 5 is
The legs extend downward.

The cloth frame 4 is formed by assembling a steel material having a rectangular cross section into a rectangular frame body, and is sandwiched between a pair of cross members 7 facing the retaining side and opposite ends of both cross members 7. And a pair of vertical members 8 erected in the above manner. A plurality of joints 9 communicating with the inside along the longitudinal direction of the upper surface of each cross member 7
Are protruded at intervals, and as shown in FIG. 1, the joint 9 is connected to the water pump 10 via a hose 11 so that water pumped up from the water pump 10 flows into the horizontal member 7. I have. At both ends in the longitudinal direction of each cross member 7, a joint portion 12 communicating with the inside is extended and provided. The joint portion 12 is connected to the joint portion 12 of the adjacent shoring 1 by a tubular fastener 13. It is like that. Note that, specifically, an elbow, a T-shaped joint, a cylindrical body having an external thread engraved on the outer surface, or the like is used for the joint 9 and the joint 12. In addition, a hook 14 is provided at an intermediate portion of the cross member 7 so as to be suspended and conveyed.

The drainage method of the present invention will be described with reference to FIG. First, a place where a water pipe or the like is to be buried is excavated to a depth smaller than the burial depth, and an earth retaining shoring 1 is inserted there. Buried under the ground. At this time, if the soil is soft, it can be buried all at once to a predetermined depth. After the support 1 is completely fitted in its entire height, the support 1
Driving steel sheet piles 15 along both sides of
The earth retaining is completed by driving the excavation groove 16 deeper than a predetermined depth. After that, the soil in the shoring 1 is dug down to form an excavation groove 16 having a predetermined depth. This work is repeatedly performed along the planned laying point of the water pipe or the like, so that the plurality of the shoring works 1 are continuously arranged in a vertical line. Subsequently, a plurality of pumping pipes 10 formed by extending the well points 18 at the lower end of the riser pipe 17 are cast from the inside of the support 1 toward the bottom surface of the excavation groove 16 by the well point method. In addition, pumping pipe 10
When the depth of the excavation groove 16 is 2 m, it is sufficient to drive the excavation groove 16 to a depth of about 1 m from the bottom surface of the excavation groove 16. In addition, pumping pipe 10
In order to lay a water pipe or the like, it is placed in a side portion of the excavation groove 16 (a portion near the face plate 3) and at a position below the joint 9, avoiding the center of the excavation groove 16. Thereafter, the top of the water pipe 10 and the joint 9 are connected by the hose 11 and the joints 12 of the adjacent supports 1 are connected to each other by the fasteners 13.
Connect with. The last (left side in the figure) support 1 and the first (right) support 1 have no adjacent supports 1, and therefore, the first support 1 in the joint portion 12 in which the fastener 13 is not provided. The one with a stopper 19, while the last shoring 1
Is connected to a pump 21 by a hose 20. When the pump 21 is driven in this state, the water reaches the inside of the cross member 7 after passing through the water pump 10, is finally guided to the pump 21, and is drained to another place after being filtered. In addition, if drainage of the excavation groove 16 is completed, either of the work of laying the water pipe and the like and the work of pulling out the pumping pipe 10 may be performed in any order.

The cross member 7 of each shoring 1 is provided with two joining portions 9 in FIG. 2, but is not limited thereto, and may be provided with one or three or more.

[0020]

According to the first aspect of the present invention, since the pumping pipe is driven into a place where drainage is required, that is, into the excavation groove, a conventional method of driving the pumping pipe together with the protection pipe into a place away from the excavation groove is used. The length of the shot is shorter than that of
Since the present invention is a method of directly driving a pumping pipe into the bottom of a digging groove, that is, a soft layer of soil, the pumping pipe is driven into the hard layer of asphalt together with the protective pipe to crush and pull out the protective pipe. In addition to saving the labor of pulling out, the driving operation can be performed easily and quietly, and as a result, residents near the construction site can live a comfortable life as usual. In addition, since the soil is soft, the drawing operation can be easily performed.

According to a second aspect of the present invention, hollow cross members facing adjacent to the earth retaining side of the adjacent cloth frames are provided in communication with each other, and these cross members are connected to a pump connecting a pumping pipe and a pump installed on the ground. This is a method in which water pumped up from a pumping pipe intervenes in the road and is guided to the pump after passing through the cross-members of earth retaining supports placed in the excavation trench. In comparison with the conventional method of guiding water to the collected drainage pipe, the road can be used in a wider state. Also, since the entrance is not blocked, entry and exit of the house can be performed without any trouble.

According to the third aspect of the present invention, the hollow cross member is provided with a joint portion to the pumping pipe and a joint portion to the adjoining cross member of the supporting structure, so that the pumping pipe and the cross member are provided. The connection work with can be easily performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a drainage method according to the present invention.

FIG. 2 is a perspective view showing an earth retaining shoring according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earth retaining shoring (shoring) 3 Face plate 4 Cloth frame 5 Building frame 7 Horizontal material 8 Vertical material 9 Joint 10 Pumping pipe 12 Joint 15 Sheet pile (steel sheet pile) 16 Drilling groove 21 Pump

Claims (3)

[Claims] 1. A plurality of earth retaining supports having a plurality of building frames (5) on a cloth frame (4) and having a face plate (3) attached between the two building frames (5) facing the earth retaining side. The work (1) is buried in the soil in a row, and the sheet pile (1) is laid along the outer surface of each face plate (3).
5), and after excavating the soil in the shoring (1) to form a digging groove (16), a plurality of pumping pipes (10) from inside the shoring (1) toward the bottom surface of the digging groove (16). ) Is installed at intervals along the column direction. 2. The drainage method according to claim 1, wherein the plurality of retaining struts (1) arranged in a row are formed by hollow cross members (7) facing the retaining side of an adjacent cloth frame (4). ) Are provided in communication with each other, and these cross members (7) are interposed in a flow path connecting the pumping pipe (10) and the pump (21) installed on the ground, and water pumped up from the pumping pipe (10) is provided. A draining method characterized in that it is guided to a pump (21) after passing through a cross member (7). 3. A cloth frame (4) having a plurality of building frames (5), and a face plate (3) between the two building frames (5) facing the retaining side.
A state in which a vertical frame (8) is sandwiched between both ends of a pair of cross members (7) facing the retaining side in a retaining shoring (1) to which is attached. And a cross member (7) is provided in a hollow, and a cross member (7) is further provided.
And a joint (9) to the pumping pipe (10) and a joint (12) to the cross member (7) of the adjacent shoring (1). Shoring for fastening.