WO2012163266A1 - Method for discharging water from dam concrete placing area via concealed pipe - Google Patents

Abstract

A method for discharging water from a dam concrete placing area via a concealed pipe, comprising: arranging a primary water discharge pipe in a predetermined area to communicate the upstream and the downstream of the dam; laying secondary pipes for water discharge from the main water discharge pipe to the left side and the right side of the dam body to communicate with each dam block in the area; and connecting vertical tertiary pipes for water discharge from the secondary water discharge pipes on each dam block to communicate with each concrete placing space in the dam block. By adopting the method for discharging water from the dam concrete placing area via the concealed pipe, during the concrete pouring construction process of the dam, the embedded water discharge pipe network extends and expands to all poured concrete dam blocks with the progression of the dam body concrete pouring, thereby completely covering each new concrete pouring space within the dam area, solving the problem of large-area water deposit on the dam concrete placing area, creating a dry construction environment for concrete pouring, ensuring concrete pouring quality, reducing construction interference, and achieving civilized construction.

Description

 Dam concrete discharge bin area water pipe discharge method Technical field

 The invention relates to a water discharge method, in particular to a water culvert discharge method for a dam concrete warehouse area.

Background technique

In the construction of concrete dams, the flushing of the warehouse surface, the raining, the bleeding of the concrete, etc. will cause the water in the warehouse area, and many “water puddles” and even “water ponds” of different sizes will be formed on the warehouse surface, which will not cover the new watering in time. Concrete not only affects the construction progress and concrete pouring quality, but also affects the civilized construction of the site. Therefore, it is necessary to remove the accumulated water before the concrete is poured. Commonly used methods for clearing warehouse area water include: pumping with small submersible pumps, manually using broom sweeps, artificial drowning, using cotton yarn or rags, etc., but these methods are only suitable for processing small dams within a small range. For the dams with a certain scale, due to the large number of dams, the large warehouse area requires a lot of manpower and material resources, and it takes a long time. These methods are labor-intensive and time-consuming. Very uneconomical. Especially for large-scale dam projects, the number of dam blocks is larger, the warehouse area is larger, and the water removal and discharge in the dam warehouse surface is very difficult. Frequently, due to improper arrangement, only the “displaced flow” disorder discharge method can be adopted. The sewage is flooding everywhere, polluting the construction environment, and causing great interference to the subsequent processes. As a result, the dams are often repeatedly reclaimed when they are in the warehouse. Some of the water in the lower positions are extremely difficult to discharge, and the cost of disposal is very high.

Summary of the invention

The object of the present invention is to provide a method for discharging a water pipe of a dam concrete warehouse area, which adopts a three-dimensional drainage pipe network embedded in the concrete of the dam, and directs the water accumulated in each dam block to the drainage pipe through the drainage branch pipe, and then It is collected into the drainage supervisor, and finally concentrated to the water collection pit downstream of the dam, that is, dispersed drainage and concentrated discharge, which solves the problem of drainage of the concrete water in the dam concrete warehouse, and creates environmental conditions for dry construction of concrete pouring. The quality of concrete pouring is guaranteed and construction disturbance is reduced.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for discharging a water culvert of a dam concrete warehouse area, which is characterized by the following steps:

Step 1: Arrange the drainage supervisor in the predetermined area to connect the upstream and downstream of the dam;

Step 2: Drain the water supply pipe from the drainage main pipe to the left and right sides of the dam dam body, and connect the dam blocks in the area;

Step 3: Connect the vertical drainage branch pipe from the drainage pipe of each dam block to connect the concrete storage positions in the dam block.

The drainage main pipe is arranged along the river flow direction, gradually descending from the upstream of the dam to the downstream of the dam, the upstream nozzle is closed, and the downstream nozzle is led to the outside of the dam; the drainage branch is vertically arranged, and the drainage main pipe is inclined to be connected with the small inclination angle.

The drainage branch pipe is connected to the branch pipe and introduced into the adjacent corridor. After the completion of the project, cement mortar or thick cement slurry is used to block the buried drainage pipe network.

The drainage main pipe is installed in one position, and the drainage branch pipe is led layer by layer with the concrete pouring position.

The drain branch pipe outlet is beyond a certain height at the bottom of the discharge surface of the silo surface, and the steel mesh screen is spot welded at the top of the exposed nozzle.

The dam is divided into a plurality of dam blocks through longitudinal joints and transverse joints, and the drainage main pipe and the branch pipe wall in the two sides of the joint surface are wound with asphalt hemp.

The beneficial effects of the method for discharging the water pipe in the dam concrete warehouse area of the present invention are as follows:

1. During the dam concrete pouring construction process, the above-mentioned pre-buried drainage pipe network will continue to extend to all concrete pouring dams with the progress of concrete dam pouring, covering every new dam in the dam area. The position of the concrete position is to be able to concentrate the accumulated water such as flushing water, rainwater and concrete bleeding in the construction of each dam block into the sump downstream of the dam, and then pump it out through the pump. Concrete pouring creates environmental conditions for dry construction, which not only reduces construction disturbances, but also achieves civilized construction, and is also conducive to ensuring the quality of concrete pouring.

2. The drainage main pipe and the branch pipe are inclined to the exit side, and the characteristics of self-flow of accumulated water are beneficial to save a lot of manpower, material resources and energy. The branch pipe is connected to the drainage branch pipe and introduced into the adjacent corridor. After the completion of the project, the cement drainage mortar or thick cement slurry is used to block the pre-buried drainage pipe network, so that the dam concrete forms a whole structure and avoids local artificial presence in the dam body. The cavity is conducive to ensuring the design requirements of the overall force structure of the dam.

3. The drainage supervisor is installed once, which is convenient for quickly establishing the preliminary sewage system and putting it into operation as soon as possible; the purpose of the drainage branch pipe stratification is to timely discharge the water accumulated in each warehouse surface as the construction progresses.

4. The discharge branch pipe mouth is slightly higher than the receiving face, which can effectively prevent the pipe mouth from being buried in the concrete during the pouring and cutting process; the spot welding the steel mesh at the top of the pipe mouth can prevent the foreign matter from falling into the drainage branch pipe and causing the blockage phenomenon. .

5. Because the longitudinal and transverse joints of the design divide the dam into several dams, the construction time of each dam is divided into several successive steps. After the concrete is solidified, the joint between the two adjacent dams will open and become larger. This tension may cause the pre-buried pipe spanning the seam surface to be cracked or even directly broken. Therefore, the drainage main pipe and the branch pipe in the range of 1 m on both sides of the seam surface may be lubricated to the outer wall of the pipe, thereby Prevent the embedded pipeline from cracking or even pulling off directly.

Implementation

The method for discharging the underground pipe of the dam concrete warehouse area is as follows:

1) Arrange the drainage main pipe to connect the upstream and downstream of the dam in a certain area of the dam; draw the drainage pipe from the drainage main pipe to the left and right sides of the dam body, connect the dam blocks in the area; and lead the vertical drainage from the drainage pipe of each dam block The branch pipe is connected to each position in the dam block layer by layer with the concrete pouring position. The drainage main pipe, the drainage pipe and the drainage branch pipe can be selected from different sizes of steel pipes such as DN400, DN300 and DN200.

2) The drainage main pipe is arranged along the river direction, gradually descending from the upstream of the dam to the downstream of the dam, the upstream nozzle is closed, and the downstream nozzle leads to the sump outside the dam; the drainage branch is arranged perpendicular to the river direction with a small inclination The drainage main pipe is inclined to be connected with it; the drainage branch pipe is vertically arranged, and the branch steel pipe is connected to the adjacent corridor to be used as a drainage pipe after the completion of the project. The smaller angle of inclination is to achieve an angle of inclination that facilitates water flow.

3) According to the stratification of the dam, the drainage supervisor shall be installed in place at one time, and the drainage branch pipe shall be led layer by layer with the concrete pouring position.

4), the drainage pipe on both sides of the drainage main pipe should be staggered to avoid the formation of cross joints; the drainage branch pipe mouth is beyond the discharge surface of the silo surface (before the concrete is poured and closed, the slope reserved within the diameter of about 2m around the nozzle is about 1: 2" "dish" type drainage pit) about 10cm at the bottom, spot welded steel mesh at the top of the exposed nozzle.

5) When the drainage main pipe and the branch pipe are over-seamed, the pipe wall within 1 m on both sides of the seam surface is wound with asphalt hemp; after the completion of the project, the branch pipe in the dam body gallery is filled with cement mortar (or thick cement slurry) Backfill and seal the drainage pipe network.

Brief steps of the implementation of the invention:

1) Sub-regional planning:

The drainage pipe is pre-buried inside the dam body, and a certain area is gradually formed until the three-dimensional drainage pipe network covering the entire dam.

2), phased implementation:

According to the stratification of the dam, the drainage main pipe is firstly installed in place according to the principle of gradually lowering from the upstream of the dam to the downstream of the dam; then the self-draining main pipe leads the drainage pipe to the left and right sides of the dam, connecting the dams in the area; The vertical drainage branch pipe is connected from the drainage pipe of each dam block, and the concrete pouring position is led layer by layer to connect the concrete positions in the dam block.

3) Reasonable arrangement:

According to the structural characteristics of the dam, the direction and inclination of the embedded pipeline are carefully arranged.

4), orderly arrangement:

The water in the warehouse area flows into the drainage branch pipe from the drainage pit of the warehouse face, and then flows into the drainage main pipe of the drainage main pipe through the drainage branch pipe to realize the dispersed drainage and centralized discharge.

Industrial applicability

The method of the invention is used in the concrete pouring construction process of the dam, and the above-mentioned pre-buried drainage pipe network is continuously extended to all the concrete pouring dams with the progress of the concrete pouring of the dam, covering all the dam areas in an all-round way. The newly-cast concrete position solves the drainage problem of large-area water accumulation in the concrete dam surface of the dam, which is conducive to ensuring the quality of concrete pouring. After the completion of the project, the cement drainage mortar or thick cement slurry is used to block the pre-buried drainage pipe network, so that the dam concrete forms an overall structure, avoiding the existence of artificial “cavities” in the dam body, which is beneficial to ensure the design of the overall dam structure. Claim.

Claims (6)

1. The dam concrete warehouse area water pipe discharge method is characterized by the following steps:

   Step 1: Arrange the drainage supervisor in the predetermined area to connect the upstream and downstream of the dam;

   Step 2: Drain the water supply pipe from the drainage main pipe to the left and right sides of the dam dam body, and connect the dam blocks in the area;

   Step 3: Connect the vertical drainage branch pipe from the drainage pipe of each dam block to connect the concrete storage positions in the dam block.
2. The dam concrete warehouse area water pipe discharging method according to claim 1, wherein the drainage main pipe is arranged along the river flow direction, gradually descending from the upstream of the dam to the downstream of the dam, the upstream pipe port is closed, and the downstream pipe port is led to the dam. Outside; the drainage branch is vertically oriented and tends to be connected to and connected to the drain main with a small angle of inclination.
3. The dam concrete warehouse area water pipe discharge method according to claim 1, wherein the drainage branch pipe is connected to the branch pipe and introduced into the adjacent corridor, and the cement mortar or the thick cement slurry is used to block the pre-construction after the completion of the project. Buried drainage pipe network.
4. root The method according to claim 1 or 2 or 3, wherein the drainage main pipe is installed in one position, and the drainage branch pipe is led to the concrete pouring position.
5. The method for discharging a dam concrete warehouse area water dark pipe according to claim 1 or 2 or 3, wherein the drain branch pipe mouth exceeds a certain height of the bottom of the tank face drainage pit, and the spot steel bar is welded at the top of the exposed pipe mouth. network.
6. The concrete dam area water pipe discharge method according to claim 1, wherein the dam is divided into a plurality of dam blocks through longitudinal joints and transverse joints, and drainage mains and pipes in the range of both sides of the joint surface. The pipe wall is wound with asphalt and hemp.