CN110656641A - Environment-friendly foundation drainage structure and method - Google Patents
Environment-friendly foundation drainage structure and method Download PDFInfo
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- CN110656641A CN110656641A CN201910979461.0A CN201910979461A CN110656641A CN 110656641 A CN110656641 A CN 110656641A CN 201910979461 A CN201910979461 A CN 201910979461A CN 110656641 A CN110656641 A CN 110656641A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
- E02D3/103—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains by installing wick drains or sand bags
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses an environment-friendly foundation drainage structure and a method, which solve the problems that in the prior art, the time required by foundation drainage consolidation is long, a drainage structure is easily blocked by small particles in a soil body, the utilization rate of straws is low and the environment is polluted, and realize the effects of filtering soil particles and double drainage by utilizing the filtering action among straws and the drainage characteristic of the straws in combination with the high-efficiency drainage capability of a drainage pipe. The technical scheme is as follows: the straw is diverged to closely surround the outer side of the drain pipe to form a plurality of layers of straw rings, and underground water can be discharged to the ground through the straw and a channel formed between the adjacent straw rings so as to realize filtering and double drainage.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to an environment-friendly foundation drainage structure and a method.
Background
In the projects such as buildings, roads, bridges and the like, in order to avoid the situations of excessive settlement, instability and even damage of buildings in the construction period or the operation period, the treatment of drainage consolidation is often needed to be carried out on the foundation during the construction period. The current common vertical drainage body is a sand bag or a plastic drainage plate, and the principle is that the vertical drainage body is loaded according to the weight of a building or pre-pressed on the site before the building is built, so that pore water in a soil body is discharged and gradually solidified, the foundation is settled, and the strength is gradually improved.
The inventor finds that due to the characteristics of the sand bag or plastic drainage plate structure and the structure drainage principle, the defects that the time required by foundation drainage consolidation is long, the drainage structure is easily blocked by small particles in the soil body, the drainage capacity is reduced and the like exist. Moreover, the yield of the straw crops in China is high, but the utilization rate is low, most straws are burnt on the spot, so that the resource waste is caused, and the environment is polluted.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an environment-friendly foundation drainage structure and method, which utilize the filtering action among straws and the drainage characteristic of the straws to combine with the high-efficiency drainage capability of a drainage pipe, so as to realize the effects of filtering soil particles and double drainage during drainage.
The invention adopts the following technical scheme:
the utility model provides an environment-friendly ground drainage structure, includes the vertical drainage body that forms by drain pipe and straw combination, the straw is the form of dispersing and closely encloses and form multilayer straw ring in the drain pipe outside, and groundwater can be discharged to ground through the passageway that forms between straw and the adjacent straw ring to realize filtering and dual drainage.
Furthermore, the straw is tied to the outer side of the drain pipe through the geotechnical filter cloth strip.
Furthermore, a plurality of water drainage holes are uniformly distributed in the water drainage pipe along the axial direction of the water drainage pipe, and adjacent water drainage holes are arranged in a staggered mode.
Furthermore, the distance between adjacent water permeable holes is 1.5 times of the aperture, and the distance between adjacent water permeable holes in the same row is 1.5-4 mm.
Furthermore, mounting holes are symmetrically formed in two sides of the lower end of the drain pipe.
Furthermore, the overall thickness of the multilayer straw rings is 5-8 cm, the straws in each layer of straw ring are overlapped along the length direction of the drain pipe, and the length of the overlapped adjacent straws is not less than 50 cm.
Furthermore, the straws and the adjacent straws are arranged in a tangent mode.
Furthermore, the geotechnical filter cloth strips are bound to the outer sides of the straws at intervals of set distance.
The use method of the environment-friendly foundation drainage structure comprises the following steps:
(1) leveling the original ground, and paving a lower sand cushion layer;
(2) positioning the machine tool according to the mark;
(3) inserting the vertical drainage body into the sleeve, penetrating the steel bar through the mounting hole of the drainage pipe, and bending and fixing two ends of the steel bar;
(4) inserting the sleeve into the foundation, and then pulling out the sleeve;
(5) shifting the machine tool, and paving an upper sand cushion layer;
(6) and (5) repeating the steps (1) to (5) and placing the rest vertical drainage bodies into the foundation.
Furthermore, the ratio of the distance between the adjacent vertical drainage bodies to the diameter of the vertical drainage bodies is 10-20, and the vertical drainage bodies are arranged in a quincunx shape.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the straw is made into a cylindrical ring by utilizing the characteristics of high lignification degree, good fiber development and natural hollowing, so that the straw has strong impact resistance and water permeability, soil particles can be filtered, underground water can smoothly flow into a drain pipe through the water permeable holes, and the effects of filtering and double drainage can be achieved;
(2) the invention utilizes the geotechnical filter cloth strips to bind the straw ring and the drain pipe together, so that the drain pipe and the straw cylindrical ring are more tightly combined;
(3) according to the invention, the vertical drainage body is driven into the foundation through the sleeve, so that the operation is simple, the vertical drainage body is conveniently separated from the foundation, the time is saved, and the working efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of a drain pipe according to a first embodiment of the present invention;
FIG. 2 is a top view of a first embodiment of the present invention;
FIG. 3 is a schematic view of an installation structure according to a first embodiment of the present invention;
wherein, 1, drain pipe, 2, the hole of permeating water, 3, mounting hole, 4, straw, 5, geotechnological filter cloth strip, 6, vertical drainage body, 7, reinforcing bar, 8, sleeve pipe.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced in the background art, the prior art has the defects of long time required by drainage consolidation of the foundation, easy blockage of a drainage structure by small particles in a soil body, low straw utilization rate and environmental pollution, and the invention provides an environment-friendly foundation drainage structure and a method for solving the technical problems.
The first embodiment is as follows:
the present invention is described in detail below with reference to fig. 1 to 3, and specifically, the structure is as follows:
the embodiment provides an environment-friendly ground drainage structure, includes the vertical drainage body that forms by drain pipe 1 and the combination of straw 4, utilizes the filter effect between the straw 4 and the drainage characteristic of straw 4 self to combine together with the high-efficient drainage ability of drain pipe 1, realizes the effect of filtering soil granule and dual drainage. The straws 4 are divergently and tightly enclosed outside the drain pipe 1 to form a plurality of layers of straw rings, and underground water can be discharged to the ground through the straws 4 and the channels formed between the adjacent straw rings.
The pipe wall of the drain pipe 1 is uniformly distributed with a plurality of water draining and permeating holes 2 along the axial direction, the speed of groundwater flowing into the drain pipe 14 is accelerated through the water permeating holes 2, and the time required by drainage consolidation of the foundation is shortened. Adjacent row's hole 2 staggered arrangement that permeates water makes hole 2 form triangular distribution, can be under the prerequisite of guaranteeing drain pipe 1 self intensity, and furthest utilizes the body space, shortens the time that groundwater flowed in the pipe. The drain pipe 1 is close to the lower extreme position and is equipped with two mounting holes 3 of seting up relatively, and 3 sizes of mounting hole can insert a reinforcing bar 7 can, and it is fixed with sleeve pipe 8 when being convenient for construct.
The stability of the drain pipe 1, the drainage consolidation effect and the cost are comprehensively considered, the inner diameter of the drain pipe 1 is 1-3 cm, the wall thickness of the pipe is 3-mm, the length of the drain pipe 1 is within the range of 25m, the specific length applied to the engineering depends on the depth of a soft soil foundation, and the aperture of the water permeable hole 2 on the pipe wall is 1-3 mm. The distance between the same row of water permeable holes 2 is 1.5-4 mm, and the distance between the upper row of water permeable holes 2 and the lower row of water permeable holes 2 is about 1.5 times of the aperture.
The straws 4 are made into a cylindrical ring to be wrapped around the drain pipe 1, and the adjacent straws 4 in the cylindrical ring are in close contact in a tangent mode. Because the straw 4 has high lignification degree, good fiber development and natural hollow characteristics, the straw 4 is made into a cylindrical ring and has strong impact resistance and water permeability, so that soil particles can be filtered, and underground water can smoothly flow into the drain pipe 1 through the water permeable holes 2; the straw ring can also play a role in protecting the drain pipe 1.
Because the adjacent straws 4 are tightly contacted in the straw ring, a plurality of slender channels are formed, and the underground water can be discharged to the ground through the channels formed between the straws 4 and the straws 4 according to the capillary phenomenon principle. Meanwhile, the fibers in the straws 4 are also water-absorbing materials, underground water can be discharged to the ground through the straws 4 under the action of capillarity, and the straw ring can achieve the effects of filtering and dual water discharge. After the drainage and consolidation of the foundation are finished, the straws 4 can be automatically rotten and degraded, so that the environmental problem caused by straw burning can be reduced.
Considering the thickness of the straw ring, the impact resistance of the straw ring, the filtering capacity of soil particles and the time for underground water flow to flow into the drain pipe 1, the thickness of 5-8 cm is a reasonable range. The straw 4 is selected from the complete straw stem without damage or slight damage on the premise of not influencing the strength and the water permeability. When the length of the straw 4 is not enough, the straw 4 is lapped together, the lapping length is not less than 50cm, the strength and the stability of a lapping part are ensured during lapping, and the straw is prevented from falling off when water flow impacts. The whole length of the overlapped straw 4 is the same as that of the drainpipe 1.
Because the geotechnical filter cloth has the characteristics of filtering, water discharging, reinforcement and high tensile strength, the geotechnical filter cloth strips 5 are utilized to bind the straw ring and the water discharging pipe 1 together, so that the water discharging pipe 1 and the straw ring are more tightly combined. The geotechnical filter cloth strips 5 are bound on the outer sides of the straws 4 at intervals of 1-1.5 m. The whole vertical drainage body needs to be used in combination with a ground pressurization system, under the action of vacuum preloading and surcharge preloading, super-pore water pressure is generated in the foundation, and underground water is pressed into the drainage pipe 1 and the straw ring under the action of the super-pore water pressure to be discharged, so that the effect of foundation drainage consolidation is finally achieved.
The straw ring and the water discharge pipe 1 are taken as a whole to play a role of vertical water discharge in the foundation, and the distance between the vertical water discharge bodies is suitable for ensuring smooth water discharge and the shortest path. The effect of accelerating consolidation is better because the distance between the vertical drainage bodies is shortened than the diameter of the vertical drainage bodies is increased, namely the relation between the diameter of the vertical drainage bodies and the distance of the vertical drainage bodies is better than that between the vertical drainage bodies which are thin and dense and thicker. However, the finer the more the consolidation effect, the denser the consolidation effect, the too fine the consolidation effect can not ensure the stability of the consolidation effect, and the too dense the consolidation effect can greatly disturb the surrounding soil to reduce the strength and permeability of the soil, but the consolidation effect is affected. The ratio of the distance between the vertical drainage bodies to the diameter thereof is 10-20, and the vertical drainage bodies are arranged in a quincunx shape.
The use method of the environment-friendly foundation drainage structure comprises the following steps:
(1) leveling the original ground, and paving a lower sand cushion layer;
(2) positioning the machine tool according to the mark;
(3) inserting the vertical drainage body into the sleeve 8, penetrating the reinforcing steel bar 7 through the mounting hole 3 of the drainage pipe 1 and the gap of the straw ring, and bending and fixing two ends of the reinforcing steel bar 7;
(4) inserting the casing 8 into the foundation, and then pulling out the casing 8;
(5) shifting the machine tool, and paving an upper sand cushion layer;
(6) and (5) repeating the steps (1) to (5) and placing the rest vertical drainage bodies into the foundation.
Example two:
a certain expressway is constructed on a soft soil foundation, and the thickness of the soft soil layer is 15 m. In order to avoid excessive settlement generated in the construction period and the operation period, drainage consolidation treatment needs to be carried out on the foundation in the early stage of highway construction, the strength of the foundation is increased, and the settlement of the highway is reduced.
The vertical drainage body of the first embodiment is adopted to carry out vertical drainage of the foundation, and the horizontal drainage body and the sand cushion layer are combined to finish drainage and solidification of the foundation.
Firstly, cleaning and leveling the earth surface, paving a sand cushion layer with the thickness of 30cm, and accurately determining the position of each vertical drainage body to be placed; the wooden pile (bamboo sheet pile) or the lime mark is nailed, the pile driver is placed according to the mark, a 15m long plastic drain pipe is prepared, the inner diameter is 2cm, the pipe wall thickness is 4mm, the aperture size is 1.5mm, and the hole distance is 2.5 mm. The length of a straw ring formed by straw lapping is 15m, the thickness is 6cm, the lapping length is 50cm, the straw cylindrical ring and the drain pipe are bound together by using the geotechnical filter cloth strips, and the binding is carried out once at an interval of 1 m.
And secondly, bending and fixing the reinforcing steel bars in the mounting holes penetrating through the gaps of the straw rings and the water discharge pipes at the bottom of the sleeve, operating according to the correct using sequence of the pile driver, sinking the sleeve into the foundation, pulling out the guide pipe, moving the pile driver to the next identification point, and finally laying a 20cm sand cushion. The arrangement distance between the whole bodies on the ground is 1m, and the whole bodies are in a quincunx shape. Compared with the traditional method, the method has the advantages of high drainage speed, short construction period and obvious effect.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an environment-friendly ground drainage structure, its characterized in that includes the vertical drainage body that forms by drain pipe and straw combination, the straw is the form of dispersing and closely encloses and form multilayer straw ring in the drain pipe outside, and groundwater can be discharged to ground through the passageway that forms between straw and the adjacent straw ring to realize filtering and dual drainage.
2. The environment-friendly foundation drainage structure of claim 1, wherein the straw is bound to the outside of the drainage pipe through a geotextile filter cloth strip.
3. The environment-friendly foundation drainage structure of claim 1, wherein the drainage pipe is uniformly distributed with a plurality of water drainage holes along the axial direction, and adjacent water drainage holes are staggered.
4. The environment-friendly foundation drainage structure of claim 3, wherein the distance between adjacent drainage holes is 1.5 times of the diameter of the hole, and the distance between adjacent drainage holes in the same row is 1.5-4 mm.
5. The environment-friendly foundation drainage structure of claim 1, wherein mounting holes are symmetrically formed in two sides of the lower end of the drainage pipe.
6. The environment-friendly foundation drainage structure of claim 1, wherein the overall thickness of the multilayer straw rings is 5-8 cm, the straws in each layer of straw ring are overlapped along the length direction of the drainage pipe, and the length of the overlapped adjacent straws is not less than 50 cm.
7. The environment-friendly foundation drainage structure of claim 1, wherein the straw is tangentially arranged to the adjacent straw.
8. The environment-friendly foundation drainage structure of claim 1, wherein the geotextile filter strips are bound to the outer sides of the straws at intervals of a set distance.
9. The use method of the environment-friendly foundation drainage structure as claimed in any one of claims 1 to 8, comprising the steps of:
(1) leveling the original ground, and paving a lower sand cushion layer;
(2) positioning the machine tool according to the mark;
(3) inserting the vertical drainage body into the sleeve, penetrating the steel bar through the mounting hole of the drainage pipe, and bending and fixing two ends of the steel bar;
(4) inserting the sleeve into the foundation, and then pulling out the sleeve;
(5) shifting the machine tool, and paving an upper sand cushion layer;
(6) and (5) repeating the steps (1) to (5) and placing the rest vertical drainage bodies into the foundation.
10. The use method of the environment-friendly foundation drainage structure as claimed in claim 9, wherein the ratio of the distance between adjacent vertical drainage bodies to the diameter thereof is 10-20, and the vertical drainage bodies are arranged in a quincunx shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910979461.0A CN110656641A (en) | 2019-10-15 | 2019-10-15 | Environment-friendly foundation drainage structure and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910979461.0A CN110656641A (en) | 2019-10-15 | 2019-10-15 | Environment-friendly foundation drainage structure and method |
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| CN110656641A true CN110656641A (en) | 2020-01-07 |
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