CN114382150A - A rainwater infiltration regulation and storage facility between LID facilities and its construction method - Google Patents

Abstract

The invention relates to the technical field of municipal drainage, in particular to a rainwater infiltration regulation and storage facility between LID facilities and a construction method thereof. The construction method of the present invention includes the following construction steps: designing, calculating and drawing construction drawings, positioning and laying out lines and excavating earthwork, base treatment, installation of permeable pipes, inspection and acceptance. The rainwater infiltration regulation and storage facility of the present invention includes a permeable pipe and a filtering pebbles, the permeable pipe is buried at the bottom of the covering soil, one end of the permeable pipe is connected to the first LID facility, the other end is connected to the second LID facility, and both ends of the permeable pipe are covered There is a permeable geotextile, and both ends of the permeable pipe are buried under filter pebbles. The two LID facilities are connected by permeable pipes for infiltration and exchange of rainwater. At the same time, both ends of the permeable pipes are filtered through geotextiles and pebbles to reduce sediment deposition in the permeable pipes. It improves the exchange of rainwater infiltration between LID facilities.

Description

A rainwater infiltration regulation and storage facility between LID facilities and its construction method

technical field

The invention relates to the technical field of municipal drainage, in particular to a rainwater infiltration regulation and storage facility between LID facilities and a construction method thereof.

Background technique

Sponge cities have good "elasticity" in adapting to sudden changes in the environment and dealing with natural disasters caused by large amounts of rainwater. LID (Low Impact Development) facilities are used to make full and reasonable use of rainwater, and when it rains, it absorbs and stores water. Water, seepage, purification, release and use the stored water when needed, and realize the free migration of rainwater in the city.

At present, most sponge cities are constructed with a single sponge body, and the low-impact development (LID) facilities are divided by infrastructure or roads, resulting in the inability to communicate with each other. Therefore, some of the low-impact development (LID) facilities may reach water storage. Layer-depth rainwater is drained through overflow wells, while other low-impact development (LID) facilities do not reach aquifer depths, resulting in less than maximum efficiency in overall sponge retention and storage.

SUMMARY OF THE INVENTION

In order to realize efficient rainwater circulation between low-impact development (LID) facilities and reduce the impact of development on other building traffic facilities, the present invention provides a rainwater infiltration and storage facility between LID facilities and a construction method thereof.

On the one hand, a rainwater infiltration regulation and storage facility and its construction method between LID facilities provided by the present invention adopt the following technical solutions:

A construction method for rainwater infiltration regulation and storage facilities between LID facilities, comprising the following construction steps:

Step 1: Determine the burial height, burial position and pipe diameter of the permeable pipeline through design calculations, draw construction drawings according to the calculation results, and select the permeable pipeline material according to the surface facilities of the construction site;

Step 2: According to the construction drawings, carry out positioning and lay-out at the construction site, determine the basic construction position, check the underground pipeline facilities and cable facilities, and perform earthwork excavation at the positioning and lay-out position to form a base;

Step 3: laying foundation stone on the base, installing the permeable pipe on the foundation stone in the base, and filling the gap between the base and the permeable pipe;

Step 4: Cover the permeable geotextiles at both ends of the buried permeable pipes, and lay filter pebbles on the permeable geotextiles;

Step 5: Measure the positional deviation of the permeable pipe, and detect the permeable effect of the permeable pipe.

By adopting the above technical solution, the two LID facilities are connected through a permeable pipe for the infiltration and exchange of rainwater. At the same time, both ends of the permeable pipe are filtered through geotextiles and pebbles to reduce sediment deposition in the permeable pipe. For the function of regulation and storage, the permeable pipes are buried under the covering soil, which does not affect the construction of normal building traffic on the ground, and strengthens the rainwater infiltration and exchange between LID facilities.

Preferably, the base formed after earthwork excavation in the second step is a trench, and preliminary construction treatment is performed after the trench is formed.

By adopting the above technical solution, the trench excavation is suitable for no construction facilities or construction traffic facilities above the permeable pipeline, and the construction is simple and efficient.

Preferably, the base formed after earthwork excavation in the second step is a culvert, and preliminary construction treatment is performed after the culvert is formed.

By adopting the above technical solutions, drilling culverts is suitable for buildings or traffic facilities already constructed above the permeable pipes, which can ensure maximum protection of ground buildings or traffic facilities.

Preferably, the preliminary construction treatment includes water accumulation cleaning, miscellaneous stone cleaning and bottom leveling.

By adopting the above technical solutions, the water accumulation can be cleaned to reduce the influence of the accumulation water on the installation and construction, and the construction environment can be kept dry.

Preferably, when installing the permeable pipe in the trench, hoisting and installation are adopted, and after the installation is completed, the top of the trench is backfilled with soil and compacted.

By adopting the above-mentioned technical scheme, installing in the groove, hoisting and placing in sections, and then installing in the groove as a whole, the installation construction area is relatively sufficient, which is convenient for installation and operation, and at the same time, it is convenient to adjust the installation angle during installation.

Preferably, when the permeable pipes are installed in the culvert, drag jacking and subsection installation are adopted, and after the installation is completed, the gaps between the culvert and the permeable pipes are filled and backfilled.

By adopting the above technical solutions, the installation is carried out in the culvert, the permeable pipe is inserted into the culvert by jacking, and the next section is installed at the end after inserting one section, which is convenient for installation.

In another aspect, the present invention provides a rainwater infiltration regulation and storage facility between LID facilities.

The rainwater infiltration regulation and storage facility between LID facilities includes a permeable pipe and filtering pebbles, the permeable pipe is buried at the bottom of the covering soil, one end of the permeable pipe is connected to the first LID facility, and the other end is connected to the second LID facility. Both ends of the pipe are covered with permeable geotextiles, and the two ends of the permeable pipe are buried under filtering pebbles.

By adopting the above technical solution, the permeable pipe connects the first LID facility and the second LID facility, so as to realize the rainwater circulation between the first LID facility and the second LID facility, and through the double filtration of permeable geotextiles and filter pebbles, the mud in the permeable pipe is reduced. Sand accumulation.

Preferably, the bottom of the permeable pipe is laid with foundation stone.

By adopting the above technical scheme, laying foundation pads increases the stability of the installation foundation of the permeable pipeline, and reduces the sinking of the permeable pipeline after the installation is completed.

Preferably, the permeable pipeline is assembled in multiple sections, and the sections are connected and fixed by pipeline flanges.

By adopting the above technical solution, the section of the permeable pipeline is beneficial to disassembly and transportation, and at the same time, it is beneficial to clean up the internal silt.

Preferably, the permeable geotextiles at both ends of the permeable pipe are bound outside the permeable pipe through a fixed jacket, and a support screen is provided inside the permeable pipe where the fixed jacket is installed.

By adopting the above technical solution, the support screen supports to prevent the installation of the fixed jacket from deforming the permeable pipe.

To sum up, the present invention has the following beneficial technical effects:

1. The two LID facilities are connected by permeable pipes for infiltration and exchange of rainwater. At the same time, both ends of the permeable pipes are filtered through geotextiles and pebbles to reduce sediment deposition in the permeable pipes, and part of the rainwater can be stored inside the pipes, which play the role of regulation and storage. , The permeable pipe is buried under the covering soil, which does not affect the construction of normal building traffic on the ground, and strengthens the infiltration and exchange of rainwater between LID facilities.

2. The present invention solves the problem that some of the collected rainwater is drained through the overflow well due to the difference in the time when the adjacent LID facilities reach the depth of the aquifer, optimizes the rainwater infiltration and retention path, and improves the balance of the collected rainwater in the LID facility , Improve the overall seepage and stagnation effect of the sponge, solve the problem of water storage and connection between LID facilities separated by formal roads, not subject to road slope and direction restrictions, and not subject to landscape terrain requirements, expanding the LID facilities The degree of freedom of landscape design and construction is obvious. Improve the coordination and integration of LID facilities and the surrounding environment.

3. The buried pipeline can be built into a three-dimensional type that does not occupy the surface space, does not affect the construction process of the superstructure construction, etc., solves the problem of land saving, the design is reasonable, the process is simple, the principle is clear, the control requirements are general, and it has a good practical promotion. value.

Description of drawings

Fig. 1 is the front sectional view of the construction structure of the present invention;

2 is a side structural view of the construction structure of the present invention;

3 is a schematic diagram of the external structure of the water permeable pipeline of the present invention;

FIG. 4 is a schematic view of the cutaway internal structure of the water permeable pipe of the present invention.

Description of reference numbers:

1. Permeable pipe, 10, Permeable geotextile, 101, Fixing jacket, 11, Support screen, 12, Pipe flange, 2. Covering soil, 20, Filter pebble, 3. First LID facility, 4. Second LID facility , 5, the foundation stone.

Detailed ways

The present invention will be further described in detail below in conjunction with accompanying drawings 1-4.

Example 1:

The embodiment of the present invention discloses a construction method for a rainwater infiltration regulation and storage facility between LID facilities, comprising the following construction steps:

Step 1: Determine the burial height, burial position and pipe diameter of the permeable pipe 1 through design calculations, draw construction drawings according to the calculation results, and select the material of the permeable pipe 1 according to the surface facilities of the construction site;

Step 2: According to the construction drawings, carry out positioning and lay-out at the construction site, determine the basic construction position, check the underground pipeline facilities and cable facilities, and perform earthwork excavation at the positioning and lay-out position to form a base;

Step 3: laying foundation stone 5 on the base, installing the permeable pipe 1 on the foundation stone 5 in the base, and filling the gap between the base and the permeable pipe 1;

Step 4: Cover the permeable geotextiles 10 at both ends of the buried permeable pipes 1, and lay filter pebbles 20 on the permeable geotextiles 10;

Step 5: Measure the positional deviation of the permeable pipe 1 to detect the permeable effect of the permeable pipe 1 .

A rainwater infiltration regulation and storage facility between LID facilities, with reference to Figures 1 and 2, includes a permeable pipe 1 and a filter pebble 20, the permeable pipe 1 is buried at the bottom of the covering soil 2, and one end of the permeable pipe 1 is connected to the first LID facility 3. The other end is connected to the second LID facility 4 , the two ends of the permeable pipe 1 are covered with permeable geotextiles 10 , and the two ends of the permeable pipe 1 are buried under the filter pebbles 20 .

Example 2:

On the basis of Example 1, increase:

The base formed after earthwork excavation in the second step is a trench, and preliminary construction treatment is performed after the trench is formed.

In general soil and the groundwater level is lower than the bottom of the ditch, a straight groove can be opened, but the groove depth shall not exceed the following requirements: sandy soil and gravel soil shall not exceed 1.0m; loamy soil and loam soil shall not exceed 1.25m.

When installing the permeable pipes 1 in the trenches, hoisting and installation are adopted. After the installation is completed, the top of the trenches is backfilled with soil 2 and compacted.

Example 3:

Increase on the basis of embodiment 1;

The base formed after earthwork excavation in the second step is a culvert, and preliminary construction treatment is performed after the culvert is formed.

When the permeable pipe passes through the road, a steel casing needs to be added outside.

During the positioning and laying out, the theodolite is erected on the center line of the working well and the receiving point, the position along the line passing through the center point is determined, the level line connecting the two points is pulled out, and the equipment of the pipe jacking machine is determined by using the vertical line and the tape measure. Location.

When installing the permeable pipe 1 in the culvert, drag jacking and section installation are adopted. After the installation is completed, the gap between the culvert and the permeable pipe 1 is filled and backfilled.

Example 4:

Add on the basis of embodiment 2 or 3:

The design calculation needs to calculate the water storage capacity of the overall sponge facility to obtain time and water storage capacity curves, and determine the improvement efficiency by comparing the curves.

Check the pipe fittings before construction. The performance requirements of the pipes meet the national codes and standards. The appearance should be smooth and clean, without scratches and other defects. No bubbles, cracks and obvious depressions, impurities, uneven color, decomposition and discoloration lines are allowed. Wait.

The preliminary construction treatment includes water accumulation cleaning, miscellaneous stone cleaning and bottom leveling.

Bricks, stones, wood blocks and other debris in the base should be cleaned up, and there should be no stagnant water in the groove.

The bottom of the pit is manually leveled and compacted.

A layer of medium-coarse sand sand cushion with a thickness of 10cm is laid on the upper part, a concrete foundation with a width of 120mm and a length of 500mm is constructed at the designated position, and 80-150mm of pebbles are paved with a width of 500mm.

A foundation stone 5 is laid on the bottom of the permeable pipe 1 .

The permeable pipeline 1 is assembled with multiple sections, and the sections are connected and fixed by the pipeline flange 12 .

The permeable geotextiles 10 at both ends of the permeable pipe 1 are bound to the outside of the permeable pipe 1 through a fixed jacket 101 , and a support screen 11 is provided inside the permeable pipe 1 where the fixed jacket 101 is installed.

The installation tolerances are as follows:

line project Allowable deviation (mm) Testing method 1 coordinate 100 Wire gauge 2 elevation 50 Levels, cables and rulers 3 Vertical and horizontal bending of horizontal pipes 10 Pull wire

After the installation is completed, check and accept the pipeline burial location, elevation, backfill compaction, and the effect of water in and out of the pipeline.

The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention. Inside.

Claims (10)

1. a rainwater infiltration regulation and storage facility construction method between LID facilities, is characterized in that: comprise the following construction steps: Step 1: Determine the burial height, burial position and pipe diameter of the permeable pipeline (1) through design calculations, draw construction drawings according to the calculation results, and select the material of the permeable pipeline (1) according to the surface facilities of the construction site; Step 2: According to the construction drawings, carry out positioning and lay-out at the construction site, determine the basic construction position, check the underground pipeline facilities and cable facilities, and perform earthwork excavation at the positioning and lay-out position to form a base; Step 3: laying a foundation stone (5) on the base, installing the permeable pipe (1) on the foundation stone (5) in the base, and filling the gap between the base and the permeable pipe (1); Step 4: wrapping permeable geotextiles (10) at both ends of the buried permeable pipes (1), and laying filter pebbles (20) on the permeable geotextiles (10); Step 5: Measure the positional deviation of the permeable pipe (1), and detect the permeable effect of the permeable pipe (1). 2. A construction method for rainwater infiltration regulation and storage facilities between LID facilities according to claim 1, characterized in that: the base formed after earthwork excavation in the step 2 is a groove, and a preliminary step is carried out after the groove is formed. construction treatment. 3. The construction method for a rainwater infiltration regulation and storage facility between LID facilities according to claim 1, wherein the base formed after earthwork excavation in the step 2 is a culvert, and a preliminary construction treatment is carried out after the culvert is formed. . 4. The construction method for a rainwater infiltration regulation and storage facility between LID facilities according to claim 2 or 3, characterized in that: the preliminary construction treatment comprises stagnant water cleaning, miscellaneous stone cleaning and bottom leveling. 5. A construction method for rainwater infiltration regulation and storage facilities between LID facilities according to claim 2, characterized in that: when installing the water permeable pipe (1) in the groove, hoisting and placement and segmented installation are adopted, and after the installation is completed, The top of the trench is backfilled with soil (2) and compacted. 6. A construction method for rainwater infiltration regulation and storage facilities between LID facilities according to claim 3, characterized in that: the installation of permeable pipes (1) in the culvert adopts drag jacking and subsection installation, and after the installation is completed, the culvert is installed in the culvert. Fill and backfill the gap between it and the permeable pipe (1). 7. A rainwater infiltration regulation and storage facility between LID facilities, characterized in that: it comprises a permeable pipeline (1) and a filtering pebble (20), wherein the permeable pipeline (1) is buried at the bottom of the covering soil (2), and the permeable pipeline One end of (1) is connected to the first LID facility (3), and the other end is connected to the second LID facility (4); Both ends of the permeable pipe (1) are covered with permeable geotextiles (10); Both ends of the permeable pipe (1) are buried under the filtering pebbles (20). 8 . The rainwater infiltration regulation and storage facility between LID facilities according to claim 7 , wherein the bottom of the permeable pipe ( 1 ) is laid with a foundation stone ( 5 ). 9 . 9. A rainwater infiltration regulation and storage facility between LID facilities according to claim 7, characterized in that: the water permeable pipe (1) is assembled in multiple sections, and the sections are connected and fixed by a pipe flange (12) . 10. A rainwater infiltration regulation and storage facility between LID facilities according to claim 7, characterized in that: the permeable geotextiles (10) at both ends of the permeable pipe (1) are bound to the permeable through a fixing jacket (101). Outside the pipe (1), a support screen (11) is provided inside the permeable pipe (1) where the fixing jacket (101) is installed.

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