Construction method of water-side slope geotechnical bag structure

Abstract

A kind of construction method of water side slope geotechnical mould bag structure, comprising the following steps: S1: geotechnical mould bag is extended and is pressed into the slope top inclined plane and is fixed with U-shaped nail;S2: positioning steel pipe and positioning steel pipe connection are respectively driven in slope top and slope bottom;S3: geotechnical mould bag is filled simultaneously above and below water, flocculating agent is added to fast consolidation below normal water level line, and regular shape geotechnical mould bag is laid above normal water level line;S4: fill the filling hole of polygon shape on geotechnical mould bag and fill self-compacting soil, and high-pressure filling forms spherical expansion body;S5: diver ensures that the nylon rope sleeve is sleeved into the positioning steel pipe of slope top and slope bottom, and ensures that geotechnical mould bag is stably positioned;S6: diver carries out underwater adjustment to the bedding and each part connection of geotechnical mould bag, and ensures that bag body is tightly combined.The stability of the structure is effectively improved by high-pressure grouting technology, water flow impact can be resisted, and slope collapse can be prevented.

Description

TECHNICAL FIELD

[0001] The application relates to a water-side slope water conservancy construction method, in particular to a construction method of a water-side slope geotechnical formwork bag structure and belongs to the technical field of water conservancy projects. BACKGROUND

[0002] With the increasing demand for water conservancy projects and coastal protection, the traditional slope protection structure is prone to damage under the impact of water flow, especially the part below the normal water level line, which is unstable due to water flow scouring. At the same time, although the traditional hard slope protection structure can provide certain protection, it lacks ecological restoration ability and cannot realize sustainable development of the environment. Therefore, in view of the durability of the underwater slope protection and the ecological function of the water part, a new slope protection technology combining structural stability and ecological restoration ability is urgently needed. SUMMARY

[0003] The application provides a construction method of a water-side slope geotechnical formwork bag structure, and aims to solve the problems of poor stability and insufficient ecological function of the slope protection structure in the prior art.

[0004] A construction method of a water-side slope geotechnical formwork bag structure, characterized in that the method comprises the following steps:

[0005] S1: extending and pressing the geotechnical formwork bag into the slope top inclined surface at the slope top, and laying the geotechnical formwork bags on the slope surface, and fixing the connecting part with U-shaped nails;

[0006] S2: driving positioning steel pipes at the slope top and the slope bottom, dragging the geotechnical formwork bag below the normal water level by a ship, ensuring that the nylon rope sleeve is connected with the positioning steel pipe by a diver, and adjusting the position of the geotechnical formwork bag by using a hand-operated hoist;

[0007] S3: simultaneously filling the geotechnical formwork bags above and below the water, filling the self-compacting soil from the filling hole, filling in the order of deep water first and shallow water last and bottom first and top last, and filling by the diver stepping or using a vibrating instrument, adding a flocculating agent for rapid consolidation below the normal water level line, laying regular-shaped geotechnical formwork bags above the normal water level line and filling the self-compacting soil around the geotechnical formwork bags, making the middle part into a regular rectangle and not filling the self-compacting soil, and planting green plants in the middle part;

[0008] S4: the part below the normal water level line is filled with the self-compacting soil around the geotechnical formwork bag according to different wave levels, the filling hole in the shape of a polygon is arranged on the geotechnical formwork bag to fill the self-compacting soil, the unfilled part in the middle is formed into a grouting hole by opening holes, and the high-pressure filling is formed into a spherical expansion body;

[0009] S5: the diver operates underwater, ensures that the nylon rope sleeve is sleeved into the positioning steel pipe at the top and bottom of the slope, and the positioning anchor and positioning float are cast at the bottom of the slope; the hand-operated hoist is used at the top of the slope to adjust the horizontal and vertical positions of the earthwork formwork bag on water and underwater, and the earthwork formwork bag is ensured to be smoothly positioned;

[0010] S6: the diver adjusts the bedding and connection of the earthwork formwork bag underwater, and ensures the close combination of the bag body and the foundation structure and the construction accuracy.

[0011] Further, in step S1, the U-shaped nails are punched into the slope body after being filled with self-compacting soil, and the interval distance is 5-20 cm.

[0012] Further, the filling speed of the earthwork formwork bag should be maintained at 5-30 m 3 / h, and the filling pressure is kept at 0.1-1.0 MPa.

[0013] Further, in step S4, the middle part of the earthwork formwork bag is made into a hexagonal honeycomb shape, an arrow honeycomb shape and a concave hexagonal honeycomb shape.

[0014] Preferably, the material of the earthwork formwork bag is an ultraviolet-resistant high-strength polymer, which can resist harsh environmental conditions for a long time.

[0015] Preferably, the diameter of the nylon rope sleeve is 5-10 mm, which has the characteristics of strong wear resistance and large tensile strength, and ensures the stable connection of the earthwork formwork bag during construction.

[0016] Preferably, the positioning steel pipe is made of stainless steel pipe with a diameter of 40-60 mm.

[0017] The beneficial effects of the present application are:

[0018] By high-pressure grouting technology, a spherical expansion body is formed, which effectively improves the stability of the structure;

[0019] The earthwork formwork bag structure can resist water flow impact and prevent slope collapse;

[0020] The ecological planting function of the water surface part not only improves the environmental benefits of the slope, but also realizes the organic combination of slope protection and ecological restoration. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the ecological slope protection structure of the present application;

[0022] Figure 2 It is a schematic diagram of different forms of underwater earthwork formwork bags of the present application;

[0023] Figure 3 It is a schematic diagram of the construction of the water ecological slope protection of the present application;

[0024] Figure 4 、 5 Figure 1 is a schematic diagram of the water ecological slope of the present application;

[0025] Figure 6 Figure 1 is a schematic diagram of the water ecological slope of the present application;

[0026] In the figure, 1 is a slope body, 2 is a geotechnical mould bag, 3 is a U-shaped nail, 4 is a slope bottom, 5 is a normal water level line, 6 is a slope surface, 7 is a positioning steel pipe, 8 is a nylon rope sleeve, 9 is a regular rectangle, 10 is a hexagonal honeycomb shape, 11 is a concave hexagonal honeycomb shape, 12 is a filling hole, 13 is a green plant, 14 is an unfilled part, 15 is a grouting hole, 16 is a spherical expansion body, 17 is a positioning anchor, 18 is a positioning float, 19 is a ship, 20 is a hand-operated hoist, 21 is a slope top, 22 is a diver, and 23 is an arrowhead honeycomb shape. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with specific implementation examples, but should not be understood as a limitation of the present application.

[0028] EMBODIMENT

[0029] A construction method of a water-side slope geotechnical mould bag structure, characterized in that it comprises the following steps:

[0030] S1: The geotechnical mould bag 2 is extended and pressed into the top inclined surface of the slope body 1 at the slope top 21, and the geotechnical mould bags 2 above and below water are respectively laid on the slope surface 6, and the connecting part is fixed with a U-shaped nail 3. In order to ensure safety, the U-shaped nail 3 is punched into the inside of the slope body 1 after the self-compacting soil is filled, and the interval distance is 5-20 cm, which can avoid the deformation of the U-shaped nail 3 due to temperature, earthquake, etc., and cannot play a fixing role, as shown in Figure 1 .

[0031] S2: The positioning steel pipe 7 is punched into the slope top 21 and the slope bottom 4 respectively, the geotechnical mould bag 2 is dragged below the normal water level 5 by the ship 19, the diver 22 ensures the connection of the nylon rope sleeve 8 and the positioning steel pipe 7, and the position of the geotechnical mould bag 2 is adjusted by using the hand-operated hoist 20. In order to ensure sufficient strength, the material of the geotechnical mould bag 2 is an ultraviolet-proof high-strength polymer, which can resist harsh environmental conditions for a long time. The positioning steel pipe 7 is selected to be a stainless steel pipe with a diameter of 40-60 mm, which can ensure a certain tensile strength and facilitate construction at the same time, as shown in Figure 2 .

[0032] S3: Fill the geotechnical bag 2 on water and underwater at the same time, fill the self-compacting soil from the filling hole 12, fill in the order of deep water first, shallow water later, bottom first, top later, diver 22 steps on or uses vibration equipment to assist filling, add flocculating agent for rapid consolidation below the normal water level line 5, lay regular geotechnical bag 2 above the normal water level line 5, fill self-compacting soil around, and make regular rectangle 9 in the middle part, do not fill self-compacting soil, and plant green plants 13;

[0033] S4: The part below the normal water level line 5 is filled with self-compacting soil around the geotechnical bag 2 according to different wave levels, the filling hole 12 is opened on the geotechnical bag 2 to fill the self-compacting soil, the middle part 14 is not filled, the grouting hole 15 is formed by opening the hole, and the spherical expansion body 16 is formed by high-pressure filling, as shown in Figure 2 .

[0034] In order to ensure the filling effect, the optimal scheme is to maintain the filling speed of the geotechnical bag 2 at 5-30 m 3 / h, and the filling pressure is kept at 0.1-1.0 MPa. If the speed and pressure are too large, the mud will accumulate at the bottom, and the filling effect will be uneven. In step S4, the middle part of the geotechnical bag 2 is made into a hexagonal honeycomb shape 10, an arrow honeycomb shape 23 and a concave hexagonal honeycomb shape 11, which is an optimal scheme. Considering the purpose of wave elimination by counteracting with sea waves, the honeycomb shape structure can absorb energy and better achieve the effect of wave elimination and buffering, as shown in Figures 4-6 .

[0035] S5: The diver 22 operates underwater to ensure that the nylon rope sleeve 8 is sleeved into the positioning steel pipe 7 at the slope top 21 and the slope bottom 4, and the positioning anchor 17 and the positioning float 18 are placed at the slope bottom 4 for fixation, the hand-operated hoist 20 is used at the slope top 21 to adjust the horizontal and vertical positions of the geotechnical bag 2 on water and underwater, to ensure that the geotechnical bag 2 is stably positioned, the diameter of the nylon rope sleeve 8 is 5-10 mm, which can ensure wear resistance and tensile strength, and ensure the stable connection of the geotechnical bag 2 during construction, and also facilitate the movement and adjustment of the diver 22.

[0036] S6: The diver 22 adjusts the bedding and connection of the geotechnical bag 2 underwater to ensure the close combination of the bag body and the foundation structure and the construction accuracy, as shown in Figure 3 .

[0037] To sum up, the underwater part of the ecological slope protection structure of the soil engineering formwork bag 2 adopts different forms of the soil engineering formwork bag 2 to achieve the wave absorbing purpose, and forms a spherical expansion body through the high-pressure grouting technology, so that the stability of the slope is effectively improved. The ecological planting design of the overwater part not only improves the environmental benefits of the slope protection, but also enhances the stability of the slope. Moreover, the application has simple construction, accurate positioning, and good protection and ecological restoration effects.

Claims

1. A method of constructing a geotextile bag structure for a water-side slope, characterized by, The method comprises the following steps: S1: extend the geotechnical bag (2) to the top of the slope (1) at the top of the slope (21), and lay the geotechnical bag (2) on the slope surface (6) above and below the water, and fix the connection with the U-shaped nail (3); S2: drive the positioning steel pipe (7) at the top of the slope (21) and the bottom of the slope (4) respectively, drag the geotechnical bag (2) below the normal water level (5) by the ship (19), ensure that the nylon rope sleeve (8) is connected with the positioning steel pipe (7) by the diver (22), and adjust the position of the geotechnical bag (2) by using the hand-operated hoist (20); S3: fill the geotechnical bags (2) above and below the water at the same time, fill the self-compacting soil from the self-compacting hole (12), fill in the order of deep water first and shallow water last, bottom first and top last, step on the diver (22) or use the vibration instrument to assist filling, add flocculating agent for rapid consolidation below the normal water level (5), lay the regular-shaped geotechnical bag (2) above the normal water level (5), fill the self-compacting soil around, make the middle part into a regular rectangle (9), do not fill the self-compacting soil, and plant green plants (13) in the middle part; S4: the part below the normal water level (5) is filled with self-compacting soil around the geotechnical bag (2) according to different wave levels, the self-compacting hole (12) is opened on the geotechnical bag (2) to fill the self-compacting soil, the middle part (14) is not filled, the grouting hole (15) is formed by opening, and the spherical expansion body (16) is formed by high-pressure filling; S5: the diver (22) operates underwater to ensure that the nylon rope sleeve (8) is sleeved into the positioning steel pipe (7) at the top of the slope (21) and the bottom of the slope (4), and the positioning anchor (17) and the positioning float (18) are thrown at the bottom of the slope (4) for fixation; the hand-operated hoist (20) is used at the top of the slope (21) to adjust the horizontal and vertical positions of the geotechnical bags (2) above and below the water, so that the geotechnical bags (2) are stably positioned; S6: the diver (22) adjusts the bedding and connection of the geotechnical bags (2) underwater.

2. The method of claim 1, wherein the method further comprises: In step S1, the U-shaped nail (3) is driven into the slope (1) after the self-compacting soil is filled, and the interval distance is 5-20 cm.

3. The method of claim 1, wherein the method further comprises: The filling speed of the earthwork mould bag (2) should be maintained at 5-30 m 3 / h, and the filling pressure should be maintained at 0.1-1.0 MPa.

4. The method of claim 1, wherein the method further comprises: In step S4, the middle part of the geotechnical bag (2) is made into a hexagonal honeycomb shape (10), an arrow honeycomb shape (23) and a concave hexagonal honeycomb shape (11).

5. The method of constructing a water-facing slope geotextile bag structure according to claim 1, wherein The material of the geotechnical bag (2) is high-strength polymer resistant to ultraviolet rays.

6. The method of constructing a water-facing slope geotextile bag structure according to claim 1, wherein The diameter of the nylon rope sleeve (8) is 5-10 mm.

7. The method of constructing a water-facing slope geotextile bag structure according to claim 1, wherein The positioning steel pipe (7) is made of stainless steel pipe with a diameter of 40-60 mm.

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