CN115595995A

CN115595995A - Grouting and drainage integrated pipe for soil slope and construction method thereof

Info

Publication number: CN115595995A
Application number: CN202211363561.9A
Authority: CN
Inventors: 叶佳欢; 王康宇; 陈欣凯; 朱嘉煜; 邱梓良; 陈智攀
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-01-13

Abstract

The invention discloses a grouting and drainage integrated pipe for a soil slope and a construction method thereof, wherein the grouting and drainage integrated pipe comprises a grouting and drainage integrated pipe, an integrated pipe fixing system and an integrated pipe pile casing; the grouting and drainage integrated pipe comprises a drainage system and a grouting system; the drainage system adopts methods of water body self-weight action drainage, siphon principle drainage and the like, and is favorable for quickly and effectively draining the surface water and the underground water of the side slope; the grouting system can be used for reinforcing soil bodies around the integrated pipe in the construction process and used for grouting and reinforcing soil bodies of later slopes as an embedded grouting reinforcing device. The main construction of the invention comprises the following steps: splicing the devices; installing a grouting and drainage integrated pipe; disassembling the integrated pipe protecting cylinder; grouting and reinforcing; grouting the pipeline seal; fixing the grouting and drainage integrated pipe; draining the conventional soil body; and (5) grouting and reinforcing the soil body subsequently. The invention can effectively reduce the engineering cost and effectively solve the problem of slope landslide caused by excessive underground water accumulated in the soil body of the slope.

Description

Grouting and drainage integrated pipe for soil slope and construction method thereof

Technical Field

The invention relates to the technical field of slope damage treatment, in particular to a grouting and drainage integrated pipe for a soil slope and a construction method thereof.

Background

China has broad width of farmers, wide mountain areas, uneven rainfall and large seasonal rainfall difference. Due to the influence of terrain and climate characteristics of China, landslide disasters become one of common natural disasters of China, and the urban economy and the life safety of people of China are seriously threatened. Under the influence of mountain development and extreme climate, in recent years, landslide frequency is increasing day by day, and the treatment of landslide problem becomes the problem that the development of China cannot avoid. The existing research shows that the rise of the underground water level of a slope body caused by rainfall infiltration is a main cause of landslide problems in China. Therefore, one of the key points in controlling landslide is to control water.

At present, common slope drainage measures include: surface drainage ditches, drainage blind ditches, water collecting wells for pumping water, underground drainage holes and the like. The surface drainage ditch and the drainage blind ditch are mainly used for dredging surface water, underground water in a soil body is difficult to dredge, and drainage effectiveness is difficult to guarantee. The water collecting well needs a large amount of power and frequent management for water pumping, the energy efficiency consumption is high, and the use cost is high. The underground drainage hole has long construction period, complex process and high cost. In addition, the drainage process has single function, and is easy to disturb the slope soil body in the pipeline construction process, so that landslide can be induced artificially.

Therefore, in order to solve the problem of soil landslide, aiming at the current engineering situations of multiple problems, complex process, high construction cost and incomplete side slope drainage technology, a treatment technology for soil side slope landslide, which has the advantages of quick and simple construction, safety, effectiveness, complete functions and low cost, is urgently needed.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a grouting and drainage integrated pipe for a soil slope and a construction method thereof.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention provides a grouting and drainage integrated pipe for a soil slope on one hand, and the grouting and drainage integrated pipe specifically comprises a grouting and drainage integrated pipe, an integrated pipe fixing system and an integrated pipe pile casing;

the grouting and drainage integrated pipe comprises a drainage system and a grouting system; the drainage system comprises an integrated pipe main body and a water collecting port; the central area of the integrated pipe main body is a drainage channel; when the rainwater falls, the rainwater is gathered into the water storage tank and is directly discharged along the drainage channel through the water collecting opening; the side wall of the integrated pipe main body facing the soil slope is provided with a plurality of water seepage ports, and water in the soil body seeps into the water seepage ports under the action of gravity when the underground water level is too high and is converged into a drainage channel to be discharged; the flow of water flow in the drainage channel can generate pressure difference inside and outside the grouting drainage integrated pipe, so that the infiltration efficiency of water in soil is improved; the geotechnical cloth is arranged outside the water seepage port to serve as a filter layer and is used for filtering soil particles, so that slope cavities caused by soil particle loss are avoided; a plurality of telescopic water conveying pipes are arranged on the side wall of the integrated pipe main body back to the soil slope; the telescopic water delivery pipe is connected with the integrated pipe main body through water-swelling rubber and a spring; the water-swelling rubber is used for preventing a gap from being formed at the joint of the telescopic water delivery pipe and the integrated pipe main body; the spring is used for pressing the telescopic water conveying pipe into the soil body after the integrated pipe protection barrel is removed; the telescopic water conveying pipe comprises a closed hole section and a water permeable hole section, and soil on the back of the slope can be gathered into the drainage channel through the telescopic water conveying pipe; when the underground water level in the soil body rises and water in the drainage channel rapidly flows, pressure difference is formed inside and outside the grouting drainage integrated pipe to generate a siphoning effect, so that underground water back to the slope is enabled to be converged into the drainage channel to be drained;

the grouting system comprises grouting pipelines and grouting holes; the grouting pipeline is sleeved in the integrated pipe main body and is connected with the grouting hole; after the integrated pipe protection cylinder is disassembled, grout can be injected into a side slope soil body through a grouting system to reinforce the side slope, so that the disturbance influence of the installation of a grouting and drainage integrated pipe on the peripheral soil body is compensated, and the side slope sliding risk is reduced; the grouting system can be used for subsequent slope soil body reinforcement;

the integrated pipe fixing system comprises a hole concrete reinforcing body and a semi-ring type fixing steel ring; the semi-ring type fixed steel ring is fixed on the opening concrete reinforcing body through a first bolt; every two half-ring type fixed steel rings are connected through a second bolt to form a complete fixed steel ring for fixing the grouting and drainage integrated pipe.

The integrated pipe protecting cylinder comprises an integrated pipe protecting cylinder main body and a protecting cylinder end part; the integrated pipe casing main body is sleeved outside the grouting and drainage integrated pipe and used for protecting the grouting and drainage integrated pipe and preventing the grouting and drainage integrated pipe from being damaged in the installation process; the end part of the protection cylinder is connected with the integrated pipe protection cylinder main body through a male thread and a female thread.

Further, when the geotextile is positioned at the water seepage port, the geotextile is wrapped at the water seepage port to filter soil; if the geotextile is positioned on one side of the grouting and drainage integrated pipe back to the side slope, the geotextile is arranged on one side close to the drainage channel in the telescopic water conveying pipe so as to prevent the geotextile from being damaged when the telescopic water conveying pipe jacks into the soil body.

Further, when the grouting and drainage integrated pipe is arranged in the integrated pipe casing, the spring is in a fully compressed state, and in order to enable the spring to have enough force to press the telescopic water conveying pipe into a soil body, the spring with a larger elastic coefficient is selected; before the grouting and drainage integrated pipe and the integrated pipe protective sleeve are combined, sealant can be coated near the water-swelling rubber so as to improve the sealing performance of the grouting and drainage integrated pipe.

Further, the inner diameter of the integrated pipe protection cylinder main body is set according to the size of the grouting and drainage integrated pipe, so that the grouting and drainage integrated pipe cannot be sleeved in the integrated pipe protection cylinder main body; in order to improve the siphon effect, the length of the closed pore section is properly increased, and the distance between the adjacent telescopic water delivery pipes is reduced.

Furthermore, the grouting pipelines are mutually independent and are sleeved in the grouting and water drainage integrated pipe; the grouting pipelines correspond to the grouting holes one by one; the grouting holes are spaced from the water seepage holes and the telescopic water conveying pipes to prevent the grout from influencing the discharge of water in the soil body.

Furthermore, the integrated pipe fixing system is used for fixing the top and the tail of the grouting drainage integrated pipe and preventing the grouting drainage integrated pipe from displacing.

The invention also provides a construction method of the grouting and drainage integrated pipe for the soil slope, which comprises the following steps:

(1) The device is spliced, and before the grouting and drainage integrated pipe is installed, the grouting and drainage integrated pipe is sleeved in the integrated pipe protection cylinder, and the end part of the protection cylinder is connected with the integrated pipe protection cylinder main body.

(2) Installing the grouting and drainage integrated pipe, applying static pressure on the integrated pipe protective cylinder, and pressing the integrated pipe protective cylinder and the grouting and drainage integrated pipe into a soil body; in the installation process of the grouting and drainage integrated pipe, the included angle between the grouting and drainage integrated pipe and the horizontal plane is monitored, and the error between the included angle and the design angle is not more than 0.1 degree; the designed included angle between the grouting drainage integrated pipe and the horizontal plane is more than or equal to 55 degrees, so that water in the drainage channel is prevented from being poured into the soil body through the telescopic water conveying pipe, and the drainage of the soil body is prevented from being influenced; if the design angle is less than 55 degrees, a one-way valve is arranged in the telescopic water pipe to prevent water from flowing backwards.

(3) The integrated tube protection cylinder is disassembled, when the grouting drainage integrated tube is installed to a specified position, the end part of the protection cylinder is firstly disassembled, and then the main body of the integrated tube protection cylinder is disassembled.

(4) Grouting reinforcement, after the integrated pipe protection sleeve is completely detached, reinforcing the soil body through a grouting system so as to prevent artificial landslide risk on the slope surface caused by disturbance on the surrounding soil body due to installation of a grouting drainage integrated pipe and detachment of the integrated pipe protection sleeve.

(5) The grouting pipeline is sealed, and in order to enable the grouting system to be used for soil body reinforcement in the later period, the grouting pipeline is sealed by utilizing a seal, so that the situation that surface water enters a soil body through the grouting pipeline to cause soil body damage is avoided.

(6) And fixing the grouting and drainage integrated pipe, reinforcing soil bodies near a hole inlet and a hole outlet of the grouting and drainage integrated pipe by using concrete, fixing the semi-ring type fixing steel ring on the grouting and drainage integrated pipe, completing the combination of the two semi-ring type fixing steel rings by using a second bolt, and finally fixing the semi-ring type fixing steel ring on the hardened hole concrete reinforcing body by using a first bolt.

(7) When the soil body drains, if the liquid level in the water storage tank is higher than the water collecting opening of the grouting drainage integrated pipe, surface water can be directly discharged through the drainage channel so as to reduce the influence of surface flowing water on the slope; under the action of self weight, water in soil on the upper part of the grouting and drainage integrated pipe can enter the drainage channel through the seepage holes, so that the accumulation of soil on the slope surface and underground water is reduced, and soil landslide caused by the accumulation of underground water is avoided; when the underground water level in the soil body at the lower part of the grouting and drainage integrated pipe is higher than the water permeable hole section of the telescopic water conveying pipe, water in the soil body enters the drainage channel through the telescopic water conveying pipe and is drained under the influence of siphon action; water discharged by the grouting and water discharging integrated pipe is collected in the water storage tank, and water can be provided for slope greening.

(8) And (3) grouting reinforcement at the later stage, wherein the possibility of landslide of the side slope is predicted by monitoring the deformation of the side slope, and if the deformation of the side slope reaches an early warning value, grouting reinforcement is carried out on the soil body of the side slope by using a grouting system, so that the landslide of the side slope is avoided.

Further, in the step (4), after grouting is completed in the grouting system, gas is continuously injected, and grout in the grouting system is fully pressed into a soil body, so that the phenomenon that the subsequent use of the grouting system is influenced due to the fact that the pipeline is blocked because the grout is solidified in the grouting system is avoided; the injected gas is also favorable for generating a wedge effect in the soil body, and the slurry is fully diffused in the soil body.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts a mode of combining the side wall drainage of the grouting drainage integrated pipe with the drainage of the water collecting opening, surface water can enter the drainage channel through the water collecting opening to be discharged, and the side slope soil body can also enter the drainage channel through the side wall water seepage opening of the integrated pipe to be discharged, so as to achieve the purpose of simultaneously discharging the surface water and the underground water. Meanwhile, in the flowing process of water in the drainage channel, pressure difference can be caused inside and outside the water seepage port, so that the underground water drainage efficiency is higher than that under the condition of only depending on the self weight of underground water.

2. The invention introduces a siphon principle, the drainage channel and the telescopic water pipe jointly form a siphon pipe, and a plurality of siphon pipelines are contained in the same integrated pipe so as to improve the drainage efficiency. When the underground water level in the soil body is higher than the telescopic water conveying pipe, a siphon effect can be generated, and the underground water in the soil body back to the side slope is promoted to enter the drainage channel through the telescopic water conveying pipe and be discharged.

3. The invention adopts a static pressure mode to install the grouting and drainage integrated pipe so as to reduce the overlarge disturbance of the installation of the integrated pipe to the soil body and avoid the generation of artificial landslide. The integrated tube protection sleeve adopted by the invention is beneficial to protecting the integrated tube and avoiding the damage of the integrated tube in the installation process.

4. The grouting system adopted by the invention can perform grouting reinforcement on the peripheral soil body after the integrated pipe casing is installed, so that the disturbance of the grouting and drainage integrated pipe construction on the peripheral soil body is reduced. Meanwhile, the grouting system can also be used as an embedded pipeline for grouting reinforcement on the side slope in the follow-up process, and disturbance of a soil body caused by a secondary construction grouting pipe is avoided.

5. The grouting and drainage integrated pipe is arranged in sections instead of being arranged from the top of the slope to the bottom of the slope at one time, so that the construction process is simpler, and the grouting and drainage integrated pipe is more flexible in arrangement position. Meanwhile, the water collected by the integrated pipe can be stored in a water storage tank and is used for irrigating green belts on the side slope.

Drawings

FIG. 1 is a schematic view of a grouting and drainage integrated pipe arrangement;

FIG. 2 is a detailed view of the manifold attachment system of FIG. 1;

FIG. 3 is a sectional view of the combination of a grouting and drainage integrated pipe and an integrated pipe protection sleeve;

FIG. 4 is a top view of a combination of a grouting and drainage integrated pipe and an integrated pipe protection sleeve;

FIG. 5 is a sectional view of a grouting drainage integrated pipe;

FIG. 6 is a schematic view of the installation of a grouting and drainage integrated pipe and a protection sleeve of the integrated pipe;

FIG. 7 is a schematic view of the installation of a grouting and drainage integrated pipe;

FIG. 8 is a schematic view of the detachment of the casing of the integrated pipe and the fixation of the grouting and drainage integrated pipe;

FIG. 9 is a schematic view of slope soil mass grouting reinforcement;

FIG. 10 is a schematic view of drainage of the soil from the side slope;

FIG. 11 is a flow chart of the construction of a grouting and drainage integrated pipe;

wherein: the water-saving and water-saving integrated pipe comprises a grouting and water-draining integrated pipe 1, a water draining system 1-1, an integrated pipe main body 1-1-1, a water collecting port 1-1-2, water-swelling rubber 1-1-3, a spring 1-1-4, geotextile 1-1-5, a telescopic water conveying pipe 1-1-6, a closed hole section 1-1-6-1, a water permeable hole section 1-1-6-2, a water permeable hole 1-1-7, a water draining channel 1-1-8, a grouting system 1-2, a sealing port 1-2-1, a grouting pipe 1-2-2, a grouting hole 1-2-3, a slope green-covering plant 2, a water storage tank 3, an integrated pipe fixing system 4, a hole concrete reinforcing body 4-1, a semi-ring type fixing steel ring 4-2, a first bolt 4-3, a second bolt 4-4, an integrated pipe protecting cylinder 5, an integrated pipe protecting cylinder main body 5-1, a male bolt 5-2, a female bolt 5-3 and a protecting cylinder end part 5-4.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples.

As shown in fig. 1 to 5, the grouting integrated drainage pipe for a soil slope provided by the present embodiment includes a grouting integrated drainage pipe 1, an integrated pipe fixing system 4, and an integrated pipe casing 5;

the grouting and drainage integrated pipe 1 comprises a drainage system 1-1 and a grouting system 1-2; the drainage system 1-1 comprises an integrated pipe main body 1-1-1 and a water collecting port 1-1-2; the central area of the main body 1-1-1 of the integrated pipe is a drainage channel 1-1-8; when the rain falls, the rain is converged into the water storage tank 3 and directly discharged along the drainage channel 1-1-8 through the water collecting port 1-1-2; the side wall of the main body 1-1-1 of the integrated pipe facing the soil slope is provided with a plurality of water seepage ports 1-1-7, and when the groundwater level is too high, water in the soil body seeps into the water seepage ports 1-1-7 under the action of gravity and is converged into a drainage channel 1-1-8 to be discharged; the flow of water flow in the drainage channels 1-1-8 can generate pressure difference inside and outside the grouting drainage integrated pipe 1, so that the water infiltration efficiency in a soil body is improved; the geotechnical cloth 1-1-5 is arranged outside the water seepage port 1-1-7 to be used as a filter layer for filtering soil particles and avoiding side slope cavities caused by soil particle loss; a plurality of telescopic water conveying pipes 1-1-6 are arranged on the side wall of the integrated pipe main body 1-1-1 back to the soil slope; the telescopic water delivery pipe 1-1-6 is connected with the integrated pipe main body 1-1-1 through water-swellable rubber 1-1-3 and a spring 1-1-4; the water-swellable rubber 1-1-3 is used for preventing a gap from being formed at the joint of the telescopic water delivery pipe 1-1-6 and the integrated pipe main body 1-1-1; the springs 1-1-4 are used for pressing the telescopic water conveying pipes 1-1-6 into the soil body after the integrated pipe protecting cylinder 5 is removed; the telescopic water conveying pipe 1-1-6 comprises a closed hole section 1-1-6-1 and a water permeable hole section 1-1-6-2, and the soil body on the back of the slope can be converged into a drainage channel 1-1-8 through the telescopic water conveying pipe 1-1-6; the drainage channel 1-1-8, the closed hole section 1-1-6-1 and the permeable hole section 1-1-6-2 jointly form a siphon pipeline, when the underground water level in the soil body rises and the water in the drainage channel 1-1-8 flows rapidly, pressure difference is formed inside and outside the grouting drainage integrated pipe 1 to generate siphon action, so that the underground water back to the side slope is enabled to be collected into the drainage channel 1-1-8 to be discharged.

The grouting system 1-2 includes: sealing port 1-2-1, grouting pipeline 1-2-2 and grouting hole 1-2-3; the grouting pipeline 1-2-2 is sleeved in the integrated pipe main body 1-1-1 in an inner mode and is connected with the grouting hole 1-2-3; after the integrated pipe pile casing 5 is disassembled, grout can be injected into a side slope soil body through the grouting system 1-2 to reinforce the side slope, so that the disturbance influence of the installation of the grouting drainage integrated pipe 1 on the peripheral soil body is compensated, and the side slope sliding risk is reduced; the grouting system 1-2 can be used for subsequent slope soil body reinforcement.

The integrated pipe fixing system 4 comprises a hole concrete reinforcing body 4-1 and a semi-ring type fixing steel ring 4-2; the semi-ring type fixed steel ring 4-2 is fixed on the opening concrete reinforcement body 4-1 through a first bolt 4-3; every two half-ring type fixing steel rings 4-2 are connected through a second bolt 4-4 to form a complete fixing steel ring for fixing the grouting and drainage integrated pipe 1.

The integrated tube protecting cylinder 5 comprises an integrated tube protecting cylinder main body 5-1 and a protecting cylinder end part 5-4; the integrated pipe protection cylinder main body 5-1 is sleeved outside the grouting and drainage integrated pipe 1 and used for protecting the grouting and drainage integrated pipe 1 and preventing the grouting and drainage integrated pipe 1 from being damaged in the installation process; the end part 5-4 of the pile casing is connected with the main body 5-1 of the integrated pipe pile casing through a male thread 5-2 and a female thread 5-3.

Specifically, when the geotextile 1-1-5 is positioned at the water seepage port 1-1-7, the geotextile is wrapped at the water seepage port 1-1-7 to filter soil; if the geotextile 1-1-5 is positioned on the side of the grouting and drainage integrated pipe 1, which faces away from the side slope, the geotextile 1-1-5 is arranged on one side of the telescopic water pipe 1-1-6, which is close to the drainage channel 1-1-8, so as to prevent the geotextile 1-1-5 from being damaged when the telescopic water pipe 1-1-6 is pushed into the soil body.

Specifically, when the grouting and drainage integrated pipe 1 is arranged in the integrated pipe casing 5, the springs 1-1-4 are in a fully compressed state, and in order to enable the springs 1-1-4 to have enough force to press the telescopic water conveying pipes 1-1-6 into a soil body, the springs with larger elastic coefficients are selected; before the integrated pipe 1 and the integrated pipe protective sleeve 5 are combined and grouted, sealant can be coated near the water-swelling rubber 1-1-3 to improve the sealing performance of the integrated pipe.

Specifically, the inner diameter of the integrated pipe casing main body 5-1 is set according to the size of the grouting and drainage integrated pipe 1, so that the grouting and drainage integrated pipe 1 cannot be sleeved in the integrated pipe casing main body 5-1; in order to improve the siphon effect, the length of the closed hole section 1-1-6 is properly increased, and the distance between the adjacent telescopic water conveying pipes 1-1-6 is reduced.

Specifically, grouting pipelines 1-2-2 are mutually independent and are sleeved in the grouting drainage integrated pipe 1; the grouting pipelines 1-2-2 correspond to the grouting holes 1-2-3 one by one; the grouting holes 1-2-3 are kept a certain distance away from the water seepage holes 1-1-7 and the telescopic water conveying pipe 1-1-6, so that the influence of slurry on the discharge of water in a soil body is avoided.

Specifically, the integrated pipe fixing system 4 is used for fixing the top and the tail of the grouting and drainage integrated pipe 1 and preventing the grouting and drainage integrated pipe 1 from displacing.

As shown in fig. 6 to 10, the present embodiment provides a method for constructing a grouting drainage integrated pipe for a soil slope, which includes the following steps:

(1) The device is spliced, before the grouting and drainage integrated pipe 1 is installed, the grouting and drainage integrated pipe 1 is sleeved in the integrated pipe protection cylinder 5, and the connection between the end part 5-4 of the protection cylinder and the integrated pipe protection cylinder main body 5-1 is completed.

(2) Installing the grouting and drainage integrated pipe 1, applying static pressure on the integrated pipe protective sleeve 5, and pressing the integrated pipe protective sleeve 5 and the grouting and drainage integrated pipe 1 into a soil body; in the installation process of the grouting and drainage integrated pipe 1, the included angle between the grouting and drainage integrated pipe 1 and the horizontal plane is monitored, and the error between the included angle and the design angle is not more than 0.1 degree; the designed included angle between the grouting and drainage integrated pipe 1 and the horizontal plane is more than or equal to 55 degrees, so that water in the drainage channel 1-1-8 is prevented from being poured into the soil body through the telescopic water conveying pipe 1-1-6 to influence the drainage of the soil body; if the design angle is less than 55 degrees, a one-way valve is arranged in the telescopic water pipe 1-1-6 to prevent water from flowing backwards.

(3) The integrated pipe protecting cylinder 5 is disassembled, after the grouting and drainage integrated pipe 1 is installed to a designated position, the end part 5-4 of the protecting cylinder is firstly disassembled, and then the main body 5-1 of the integrated pipe protecting cylinder is disassembled.

(4) Grouting reinforcement, namely after the integrated pipe pile casing 5 is disassembled, reinforcing the soil body through a grouting system 1-2 so as to prevent the slope surface from artificial landslide risk caused by disturbance on the surrounding soil body due to the installation of the grouting and drainage integrated pipe 1 and the disassembly of the integrated pipe pile casing 5.

(5) The grouting pipeline 1-2-2 is sealed, and in order to enable the grouting system 1-2 to be used for soil body reinforcement in the later period, the sealing 1-2-1 is used for sealing the grouting pipeline 1-2-2 so as to prevent surface water from entering the soil body through the grouting pipeline 1-2-2 to cause soil body damage.

(6) The grouting and drainage integrated pipe 1 is fixed, soil bodies near a hole inlet and a hole outlet of the grouting and drainage integrated pipe 1 are reinforced by concrete, the semi-ring type fixing steel ring 4-2 is fixed on the grouting and drainage integrated pipe 1, the combination of the two semi-ring type fixing steel rings 4-2 is completed by the second bolts 4-4, and finally the semi-ring type fixing steel ring 4-2 is fixed on the hardened hole concrete reinforcement body 4-1 by the first bolts 4-3.

(7) When the soil body drains, if the liquid level in the water storage tank 3 is higher than the water collecting port 1-1-2 of the grouting drainage integrated pipe 1 when the water falls, surface water can be directly discharged through the drainage channel 1-1-8 so as to reduce the influence of surface running water on the slope; under the action of self weight, water in soil on the upper part of the grouting and drainage integrated pipe 1 can enter the drainage channel 1-1-8 through the seepage holes 1-1-7, so that the accumulation of soil mass and underground water on the slope is reduced, and soil mass landslide caused by the accumulation of underground water is avoided; when the underground water level in the soil body at the lower part of the grouting and drainage integrated pipe 1 is higher than the water permeable hole sections 1-1-6-2 of the telescopic water conveying pipes 1-1-6, water in the soil body enters the drainage channels 1-1-8 through the telescopic water conveying pipes 1-1-6 and is drained under the influence of siphon action; the water discharged by the grouting and drainage integrated pipe 1 is collected in the water storage tank 3, so that the water can be provided for slope greening.

(8) And (3) grouting reinforcement at the later stage, wherein the possibility of side slope landslide is predicted by monitoring the deformation of the side slope, and if the deformation of the side slope reaches an early warning value, grouting reinforcement is performed on side slope soil by using a grouting system 1-2, so that the side slope landslide is avoided.

Specifically, in the step (4), after grouting is completed in the grouting system 1-2, gas is continuously injected, and the slurry in the grouting system 1-2 is fully pressed into a soil body, so that pipeline blockage caused by solidification of the slurry in the grouting system 1-2 is avoided, and subsequent use of the grouting system 1-2 is prevented from being influenced; the injected gas is also favorable for generating a wedge effect in the soil body, and the slurry is fully diffused in the soil body.

In the invention, for the part of the underground water level lower than the height of 1-1-6 of the telescopic water pipe, the underground water in the soil body is converged into the integrated pipe and discharged out of the soil body by utilizing the siphon effect. The siphon effect (or inverted siphon effect) is mostly suitable for water pipe transportation at present, and related patents are not found in slope drainage for a while. In one paper, the siphon effect is used for slope drainage, but the device in the paper is a siphon channel with one pipeline, the drainage depth and range are limited, a plurality of pipelines need to be installed at different depths of the same vertical surface, the construction is complex, and the influence on the slope is large. The structure of the invention can realize the formation of siphon effects at different depths by using one integrated pipe, on one hand, the drainage range is wider, on the other hand, the drainage and construction efficiency is higher, and the influence of construction on the side slope is smaller.

In the invention, surface water is discharged below the side slope through the drainage channels 1-1-8 of the integrated pipe, the pressure in the integrated pipe is reduced in the flowing process of water flow, the water pressure in the soil body is higher, the speed and effect of water in the soil body permeating into the integrated pipe are better under the action of pressure difference, and the drainage efficiency is improved. On the other hand, this effect also enhances the generation of the above-mentioned siphon effect, which is a point not mentioned in the article relating to the siphon effect

In the invention, if the underground water level is higher than the water seepage holes 1-1-7, the underground water directly seeps into the pipeline under the action of self weight, and meanwhile, the drainage efficiency is higher under the influence of the second principle

The existing construction of the drain pipe and the grouting pipe is mostly carried out by punching and embedding the pipe, hole collapse is easy to generate and even the stability of a side slope is affected, while the structural strength of the conventional drainage grouting pipeline is not enough to bear the driving-in of an overlong pipeline, the invention utilizes the integrated pipe pile casing 5 to enable the static pressure driving-in construction of the pipeline to be possible, and simultaneously, the pile casing can be used as a temporary support to support the affected soil body in the construction process, thereby avoiding the artificial collapse of the side slope caused by the construction

Grouting in traditional engineering is generally used for reinforcing an original dangerous side slope or blocking an underground water seepage channel, and soil disturbance selectivity caused by drainage pipeline installation is neglected. The invention takes grouting as a compensation mode for the disturbance influence of construction on the soil body, and eliminates the influence of pipeline construction on the slope soil body

The foregoing is only a preferred embodiment of the present invention, and although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make many possible variations and modifications to the disclosed solution, or to modify equivalent embodiments, without departing from the scope of the solution, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. The utility model provides a slip casting drainage collecting tube for soil slope which characterized in that includes: the grouting and drainage integrated pipe (1), the integrated pipe fixing system (4) and the integrated pipe protection sleeve (5);

the grouting and water draining integrated pipe (1) comprises a water draining system (1-1) and a grouting system (1-2); the drainage system (1-1) comprises an integrated pipe main body (1-1-1) and a water collecting port (1-1-2); the central area of the integrated pipe main body (1-1-1) is a drainage channel (1-1-8); when the water falls, rainwater is converged into the water storage tank (3) and is directly discharged along the drainage channel (1-1-8) through the water collecting opening (1-1-2); a plurality of water seepage ports (1-1-7) are arranged on the side wall of the integrated pipe main body (1-1-1) facing the soil slope, and water in the soil body seeps into the water seepage ports (1-1-7) under the action of gravity when the groundwater level is too high and is converged into a drainage channel (1-1-8) to be discharged; the geotechnical cloth (1-1-5) is arranged outside the water seepage port (1-1-7) and is used as a filter layer; a plurality of telescopic water pipes (1-1-6) are arranged on the side wall of the integrated pipe main body (1-1-1) back to the soil slope; the telescopic water delivery pipe (1-1-6) is connected with the integrated pipe main body (1-1-1) through water-swelling rubber (1-1-3) and a spring (1-1-4); the telescopic water conveying pipe (1-1-6) comprises a closed hole section (1-1-6-1) and a water permeable hole section (1-1-6-2), and soil bodies on the back of a slope are gathered into the drainage channel (1-1-8) through the telescopic water conveying pipe (1-1-6); the drainage channel (1-1-8), the closed pore section (1-1-6-1) and the water permeable pore section (1-1-6-2) jointly form a siphon pipeline;

the grouting system (1-2) comprises a grouting pipeline (1-2-2) and a grouting hole (1-2-3); the grouting pipeline (1-2-2) is sleeved in the integrated pipe main body (1-1-1) and is connected with the grouting hole (1-2-3);

the integrated pipe fixing system (4) is used for fixing the grouting and drainage integrated pipe (1);

the integrated pipe pile casing (5) is used for protecting the grouting drainage integrated pipe (1).

2. A grouting and drainage pipe integrated in a soil slope according to claim 1, characterised in that the pipe integrated fixing system (4) comprises: the concrete reinforcing body (4-1) at the opening and the semi-ring type fixed steel ring (4-2); the semi-ring type fixing steel ring (4-2) is fixed on the hole concrete reinforcing body (4-1) through a first bolt (4-3); every two half-ring type fixed steel rings (4-2) are connected through a second bolt (4-4) to form a complete fixed steel ring.

3. A grouting and drainage integrated pipe for a soil slope according to claim 2, characterized in that the integrated pipe casing (5) comprises an integrated pipe casing main body (5-1) and a casing end part (5-4); the integrated pipe protection cylinder main body (5-1) is sleeved outside the grouting and water draining integrated pipe (1); the end part (5-4) of the protective cylinder is connected with the main body (5-1) of the integrated tube protective cylinder through a male thread (5-2) and a female thread (5-3).

4. The grouting and drainage integrated pipe for the soil slope according to claim 1, characterized in that when the geotextile (1-1-5) is positioned at the water seepage port (1-1-7), the geotextile is coated outside the water seepage port (1-1-7);

when the geotextiles (1-1-5) are positioned on one side of the grouting and drainage integrated pipe (1) back to the side slope, the geotextiles are arranged on one side of the telescopic water conveying pipe (1-1-6) close to the drainage channel (1-1-8).

5. A slip casting and drainage pipe for a soil slope according to claim 1, wherein when the slip casting and drainage pipe (1) is installed in the pipe casing (5), the spring (1-1-4) is in a fully compressed state;

before the grouting and water drainage integrated pipe (1) and the integrated pipe protective sleeve (5) are combined, sealant is coated near the water-swelling rubber (1-1-3).

6. The grouting and drainage integrated pipe for the soil slope according to claim 1, wherein the grouting pipes (1-2-2) correspond to the grouting holes (1-2-3) one by one;

the distance between the grouting holes (1-2-3) and the water seepage holes (1-1-7) and the telescopic water conveying pipe (1-1-6) is kept.

7. A grouting and drainage integrated pipe for a soil slope according to claim 1, characterized in that the integrated pipe fixing system (4) is used for fixing the top and the tail of the grouting and drainage integrated pipe (1).

8. A construction method of the grouting and drainage integrated pipe for the soil slope according to any one of claims 3-7, characterized by comprising the following steps:

(1) The device is spliced, before the grouting and drainage integrated pipe (1) is installed, the grouting and drainage integrated pipe (1) is sleeved in the integrated pipe protective cylinder (5), and the connection between the end part (5-4) of the protective cylinder and the integrated pipe protective cylinder main body (5-1) is completed.

(2) Installing the grouting and drainage integrated pipe (1), applying static pressure on the integrated pipe protecting cylinder (5), and pressing the integrated pipe protecting cylinder (5) and the grouting and drainage integrated pipe (1) into a soil body; in the installation process of the grouting and drainage integrated pipe (1), monitoring the included angle between the grouting and drainage integrated pipe (1) and the horizontal plane, wherein the error between the included angle and the design angle is not more than 0.1 degree;

the designed included angle between the grouting and drainage integrated pipe (1) and the horizontal plane is more than or equal to 55 degrees; if the design angle is less than 55 degrees, a one-way valve is arranged in the telescopic water pipe (1-1-6);

(3) The integrated pipe protecting cylinder (5) is disassembled, when the grouting drainage integrated pipe (1) is installed to a specified position, the end part (5-4) of the protecting cylinder is firstly disassembled, and then the main body (5-1) of the integrated pipe protecting cylinder is disassembled;

(4) Grouting and reinforcing, namely reinforcing the soil body through a grouting system (1-2) after the integrated pipe pile casing (5) is disassembled;

(5) Sealing the grouting pipeline (1-2-2), and sealing the grouting pipeline (1-2-2) by using the seal (1-2-1);

(6) Fixing the grouting and drainage integrated pipe (1), reinforcing soil bodies near a hole inlet and a hole outlet of the grouting and drainage integrated pipe (1) by using concrete, fixing a semi-ring type fixing steel ring (4-2) on the grouting and drainage integrated pipe (1), completing the combination of the two semi-ring type fixing steel rings (4-2) by using a second bolt (4-4), and finally fixing the semi-ring type fixing steel ring (4-2) on a hardened hole concrete reinforcing body (4-1) by using a first bolt (4-3);

(7) When the soil body drains, if the liquid level in the water storage tank (3) is higher than the water collecting opening (1-1-2) of the grouting drainage integrated pipe (1), surface water is directly discharged through the drainage channel (1-1-8); a water body in the soil body on the upper part of the grouting and drainage integrated pipe (1) enters a drainage channel (1-1-8) through the seepage holes (1-1-7) under the action of self weight;

when the underground water level in the soil body at the lower part of the grouting and drainage integrated pipe (1) is higher than the water permeable hole sections (1-1-6-2) of the telescopic water conveying pipes (1-1-6), water in the soil body enters the drainage channels (1-1-8) through the telescopic water conveying pipes (1-1-6) and is drained under the influence of siphon action; water discharged by the grouting and drainage integrated pipe (1) is collected in the water storage tank (3) to provide water for slope greening;

(8) And (3) grouting and reinforcing in the later period, wherein the possibility of landslide of the side slope is predicted by monitoring the deformation of the side slope, and if the deformation of the side slope reaches an early warning value, grouting and reinforcing are carried out on the side slope soil body by using a grouting system (1-2).

9. The construction method according to claim 8, wherein: in the step (4), after grouting is completed in the grouting system (1-2), gas is continuously injected, and the slurry in the grouting system (1-2) is fully pressed into a soil body.