Anti-settling geotextile bag well structure and construction method thereof

Abstract

The present application relates to a kind of anti-settlement earthwork bag inspection well structure and its construction method.Structure includes base and the enclosure installed on base, base and enclosure form well space, enclosure extends from base upwards, and the top opening of enclosure is equipped with inspection well cover;Anti-settlement earthwork bag inspection well structure further includes geogrid and several earthwork bags, earthwork bag includes bag and the soil in bag, the structure of base and enclosure is stacked with several earthwork bags below and around, geogrid is wrapped in the earthwork bag of more than one layer in bottom part.The method includes the following steps: excavating inspection well construction surface;Geogrid is placed on the bottom surface of construction surface, two layers of earthwork bags are laid in geogrid, and base is poured using concrete on the two layers of earthwork bags laid;Horizontal layering synchronous construction enclosure, earthwork bag laying and backfill filling;Road base and road surface layer are sequentially laid above earthwork bag.The present application can effectively prevent settlement, to improve driving, pedestrian safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of infrastructure, and particularly relates to a kind of anti-settlement earthwork bag inspection well structure and its construction method. BACKGROUND

[0002] Inspection well is the underground space of city underground pipeline transfer, control. With the development of city and the improvement of living standards, the practicability and aesthetic requirements of inspection well are gradually improved. However, with the increase of traffic volume, the problem of uneven settlement of inspection well in soft soil area becomes more and more serious, which causes safety hazard to driving and walking.

[0003] The quality of backfill soil around well seat is poor or compaction degree is insufficient, which will lead to uneven settlement between inspection well and surrounding backfill soil, and further lead to the inclination or subsidence of inspection well itself, so that the inspection well cover is concave or protruding, and more serious, it will lead to the damage and collapse of inspection well itself.

[0004] Therefore, in order to reduce the safety problem of driving and walking caused by uneven settlement of inspection well, it is urgent to find a new anti-settlement inspection well structure. SUMMARY

[0005] The purpose of the present application is to provide an anti-settlement earthwork bag inspection well structure and its construction method, which can effectively prevent settlement and improve the safety of driving and walking.

[0006] In order to achieve this purpose, the present application adopts the following technical scheme:

[0007] An anti-settlement earthwork bag inspection well structure, comprising a base and a surrounding body installed on the base, the base and the surrounding body form a well space, the surrounding body extends upward from the base, and the top opening of the surrounding body is installed with an inspection well cover;

[0008] The anti-settlement earthwork bag inspection well structure further comprises a geogrid and a plurality of earthwork bags, the earthwork bag comprises a bag and a soil body filled in the bag, a plurality of earthwork bags are stacked below and around the structure composed of the base and the surrounding body, and the geogrid wraps one or more layers of earthwork bags at the bottom.

[0009] Preferably, the bag is made of polyethylene or polyvinyl chloride plastic woven bag.

[0010] Preferably, the soil body is soil material produced by on-site excavation.

[0011] Preferably, the outer contour of the plurality of earthwork bags after stacking is inverted circular table structure.

[0012] Preferably, the earthwork bags are stacked in a layer-by-layer manner and the upper and lower adjacent two layers of earthwork bags are staggered.

[0013] Preferably, the gaps between the adjacent earthwork bags and the gaps between the earthwork bags and the base and the enclosure are filled with backfill.

[0014] Preferably, the geogrid wraps two layers of the earthwork bags at the bottom and forms an incomplete wrap for the two layers of the earthwork bags at the bottom.

[0015] Preferably, the geogrid has a bottom surface, side edges and a top surface, the side edges of the geogrid extend upwardly and upwardly, the top surface of the geogrid extends horizontally from the side edges towards the center line of the manhole cover for a distance and then drops by the height of one earthwork bag and continues to extend horizontally towards the center line, and the center of the top surface of the geogrid forms an open structure to form an incomplete wrap.

[0016] A construction method of a settlement-resistant earthwork bag manhole structure, comprising the above-mentioned settlement-resistant earthwork bag manhole structure and the following steps:

[0017] (a) excavating a manhole construction surface;

[0018] (b) placing the geogrid on the bottom surface of the construction surface, laying two layers of earthwork bags in the geogrid, and pouring concrete on the laid two layers of earthwork bags to form the base;

[0019] (c) horizontally layering and synchronously constructing the enclosure, laying the earthwork bags and filling the backfill, compacting with a small compaction device after each layer is laid, and interlacing the upper and lower layers of the earthwork bags to a predetermined height;

[0020] (d) sequentially laying the road base layer and the road surface layer above the earthwork bags.

[0021] Preferably, in step (a), a reverse cone-shaped manhole construction surface is excavated.

[0022] The settlement-resistant earthwork bag manhole structure and the construction method thereof have the following beneficial effects: the earthwork bags are used to replace the existing backfill of the base and the enclosure, thereby improving the strength and load-bearing capacity of the structure of the base and the enclosure. The geogrid is used to wrap and reinforce the bottom layer of earthwork bags, thereby improving the integrity of the earthwork bags and the backfill, reducing the uneven deformation of the backfill, and reducing the influence of the deformation of the foundation on the manhole structure. The invention can effectively reduce the uneven settlement of the manhole and the surrounding backfill, and improve the safety of driving and walking. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a longitudinal sectional view of the settlement-resistant earthwork bag manhole structure of the embodiment of the invention;

[0024] Figure 2 is a transverse sectional view of the settlement-resistant earthwork bag manhole structure of the embodiment of the invention.

[0025] The names and numbers of the components in the figures are as follows:

[0026] 1 - manhole cover, 2 - enclosure, 3 - base, 4 - geogrid, 5 - geotextile bag, 6 - backfill, 7 - road base, 8 - road surface. DETAILED DESCRIPTION

[0027] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be illustrative only and not limiting of the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the sake of convenience.

[0028] As shown in Figure 1 and Figure 2 , the embodiment discloses a sedimentation-preventing manhole structure of geotextile bag, which comprises a base 3 and an enclosure 2 installed on the base 3, and the base 3 is casted by concrete. The enclosure 2 and the base 3 enclose a well space, the enclosure 2 extends upward from the base 3, and the top opening of the enclosure 2 is installed with a manhole cover 1. The material of the manhole cover 1 of the embodiment is reinforced cement, metal or reinforced plastic, etc.

[0029] The sedimentation-preventing manhole structure of geotextile bag of the embodiment further comprises a geotextile bag 5, which comprises a bag and a soil body filled in the bag. As a preferred solution, the bag is a polyethylene or polyvinyl chloride plastic woven bag, which has high strength and good corrosion resistance. The soil body is the spoil after excavation construction, i.e. backfill, which is filled and compacted by artificial method. The filling material in the geotextile bag 5 is preferably the soil material excavated on site, and materials such as sharp stones that may damage the bag are removed.

[0030] The structure composed of the base 3 and the enclosure 2 is stacked with a plurality of geotextile bags 5 below and around. The gaps between adjacent geotextile bags 5 and the gaps between the geotextile bags 5 and the base 3 and the enclosure 2 are filled with backfill 6.

[0031] As a preferred solution, the outer contour of the plurality of geotextile bags 5 stacked is a reverse circular table structure. As a preferred solution, the geotextile bags 5 are stacked in a layer-by-layer manner, and the two adjacent layers of geotextile bags 5 are staggered.

[0032] The sedimentation-preventing manhole structure of geotextile bag of the embodiment further comprises a geogrid 4, which wraps the geotextile bags 5 at the bottom. Specifically, in the embodiment, the geogrid 4 wraps the two layers of geotextile bags 5 at the bottom and forms an incomplete wrapping for the two layers of geotextile bags 5 at the bottom. The geogrid 4 preferably has high tensile strength, low elongation and strong durability.

[0033] The top surface of the stacked earthwork bags 5 is provided with a road base layer 7, and the top surface of the road base layer 7 is provided with a road surface layer 8. The road surface layer 8 is flush with the manhole cover 1. The road base layer 7 is preferably a cement stabilized gravel base layer with high strength and good anti-seepage property. The road surface layer 8 is preferably an asphalt concrete pavement with smooth surface, no joint and simple maintenance.

[0034] As a preferred solution, the overall outer contour of the manhole cover 1, the enclosure 2, the base 3, the earthwork grid 4, the earthwork bags 5, the backfill 6, the road base layer 7 and the road surface layer 8 is a reverse-tapered table structure.

[0035] The specific structure of the earthwork grid 4 is that the bottom of the earthwork grid 4 forms the bottom of the anti-settlement earthwork bag manhole structure. The side edges of the earthwork grid 4 are inclined to extend so that the overall outer contour of the anti-settlement earthwork bag manhole structure is a reverse-tapered table structure. That is, the inclination angle of the side edges of the earthwork grid 4 is the same as the inclination angle of the edges of the reverse-tapered table formed by the earthwork bags 5. The top surface of the earthwork grid 4 extends horizontally towards the center line of the manhole cover 1. Specifically, the top surface of the earthwork grid 4 extends horizontally towards the center line of the manhole cover 1 for a distance from the side edges, then drops by the height of one earthwork bag 5 and continues to extend horizontally towards the center line, and the center of the top surface of the earthwork grid 4 forms an open structure.

[0036] The advantages of the present embodiment are that the earthwork bags 5 are used to replace the existing backfill of the base 3 and the enclosure 2, thereby improving the strength and load-bearing capacity of the structure of the base 3 and the enclosure 2. The earthwork grid 4 is used to wrap and reinforce the bottom layer of earthwork bags 5, thereby improving the integrity of the earthwork bags 5 and the backfill 6, reducing the uneven deformation of the earthwork bags 5 and reducing the influence of foundation deformation on the manhole structure. The structure of the present embodiment can effectively reduce the uneven settlement of the manhole and the surrounding backfill, thereby improving the safety of driving and walking.

[0037] In addition, the earthwork bags 5 have a vibration damping and shock isolation effect, which can reduce the adverse effects of traffic load on the manhole. The earthwork bags 5 also have a water filtration and soil preservation effect, which can effectively prevent seepage damage caused by soil particle loss when the enclosure 2 is damaged. The use of earthwork bags 5 makes compaction easier and solves the difficulty of compaction of the existing narrow construction surface.

[0038] Specifically, under the action of the upper load, the bag tension of the earthwork bags 5 provides an additional cohesion to the backfill, thereby improving the strength and load-bearing capacity of the backfill and reducing the settlement.

[0039] Based on the above anti-settlement earthwork bag manhole structure, the present embodiment also discloses a construction method of an anti-settlement earthwork bag manhole structure,

[0040] a. Excavate a reverse-tapered table-shaped manhole construction surface, simply clean the construction surface, flatten the sharp stones on the surface, and simply compact the construction surface.

[0041] b, placing the geogrid 4 on the bottom surface of the construction surface, laying two layers of geotextile bags 5 in the geogrid 4, pressing the geotextile bags against the geogrid, and using concrete to pour the base 3 and level it on the laid two layers of geotextile bags 5.

[0042] c, synchronously building the enclosure 2, laying the geotextile bags 5 and filling the backfill 6 in horizontal layers, using small compaction equipment to compact after laying each layer, and staggered laying of the upper and lower geotextile bags 5 to the preset height.

[0043] d, sequentially laying the road base 7 and the road surface 8 above the geotextile bags 5.

[0044] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A sedimentation-preventing geotextile bag manhole structure, characterized by, The manhole structure comprises a base (3) and a surrounding body (2) installed on the base (3), the base (3) and the surrounding body (2) form a well space, the surrounding body (2) extends upward from the base (3), and a manhole cover (1) is installed on the top opening of the surrounding body (2); The manhole structure further comprises a geogrid (4) and a plurality of earthwork bags (5), the earthwork bags (5) comprise a bag and a soil body filled in the bag, a plurality of the earthwork bags (5) are stacked below and around the structure formed by the base (3) and the surrounding body (2), and the geogrid (4) wraps the bottom layer or more of the earthwork bags (5). The geogrid (4) wraps the bottom two layers of the earthwork bags (5) and forms an incomplete wrapping for the bottom two layers of the earthwork bags (5), specifically, the geogrid (4) has a bottom surface, side edges and a top surface, the side edges of the geogrid (4) extend upward obliquely, the top surface of the geogrid (4) extends horizontally from the side edges to the center line of the manhole cover (1) for a distance and then drops by the height of one earthwork bag (5) and continues to extend horizontally to the center line, and the center of the top surface of the geogrid (4) forms an open structure to form an incomplete wrapping.

2. The settlement resistant geotextile bag catch basin structure of claim 1, wherein: The bag is made of polyethylene or polyvinyl chloride plastic woven bags.

3. The settlement resistant geotube catch basin structure of claim 1, wherein: The soil body is soil material excavated on site.

4. The settlement resistant geotube catch basin structure of claim 1, wherein: The outer contour of the plurality of stacked earthwork bags (5) is a reverse circular table structure.

5. The sedimentation-resistant geotextile bag catch basin structure of claim 1, wherein: The earthwork bags (5) are stacked layer by layer, and the upper and lower adjacent two layers of earthwork bags (5) are staggered.

6. The settlement resistant geotube catch basin structure of claim 1, wherein: The gaps between the adjacent earthwork bags (5) and the gaps between the earthwork bags (5) and the base (3) and the surrounding body (2) are filled with backfill soil (6).

7. A method of construction of a settlement resistant soil bag manhole structure, characterised by, The manhole structure comprises the manhole structure according to any one of claims 1-6 and the steps of: (a) excavating a manhole construction surface; (b) placing the geogrid (4) on the bottom surface of the construction surface, laying two layers of earthwork bags (5) in the geogrid (4), and pouring the base (3) on the laid two layers of earthwork bags (5) using concrete; (c) horizontally layering and synchronously constructing the surrounding body (2), laying the earthwork bags (5) and filling the backfill soil (6), compacting each layer after laying is completed using a small compaction device, and the upper and lower layers of earthwork bags (5) are staggered to a predetermined height; (d) sequentially laying a road base (7) and a road surface layer (8) above the earthwork bags (5).

8. The method of installing a settlement-resistant soil bag manhole structure according to claim 7, wherein: In step (a), a reverse circular table-shaped manhole construction surface is excavated.

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