CN210031827U - Dry dock foundation pit structure - Google Patents
Dry dock foundation pit structure Download PDFInfo
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- CN210031827U CN210031827U CN201920601125.8U CN201920601125U CN210031827U CN 210031827 U CN210031827 U CN 210031827U CN 201920601125 U CN201920601125 U CN 201920601125U CN 210031827 U CN210031827 U CN 210031827U
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Abstract
The utility model discloses a dry dock foundation pit structure, which comprises a drainage ditch, a cut-off wall and a foundation pit body which are sequentially arranged from outside to inside, wherein a plurality of vertical dewatering wells are arranged between the cut-off wall and the foundation pit body, the side slope of the foundation pit body comprises a plurality of inclined slopes, two adjacent inclined slopes are connected through a horizontal slope placing platform, and a water accumulation ditch is arranged on the slope placing platform at the bottom of each inclined slope; the foundation pit is characterized in that a drainage mattress layer is laid at the bottom of the foundation pit body, a plurality of drainage pipes are arranged in the drainage mattress layer, and a concrete layer is arranged on the upper surface of the drainage mattress layer. The utility model discloses can prevent that rainwater, groundwater, surface water etc. from getting into the foundation ditch and producing ponding, make the construction go on normally in succession, be favorable to improving the efficiency of construction, guarantee construction quality.
Description
Technical Field
The utility model relates to a dry dock construction technical field, concretely relates to dry dock foundation ditch structure.
Background
The dry dock is suitable for a closed ship pool for ship water outlet inspection and repair. The dry dock is generally built at the seaside, underground water and rainwater are abundant, when the dry dock is used for constructing a foundation pit, the condition that the foundation pit is watered and accumulated water is generated frequently occurs, the accumulated water soaking can cause adverse effects on the foundation pit, and the construction quality of the foundation pit is reduced; when the foundation ditch intake, adopt the suction pump to take ponding out generally, influence the foundation ditch construction progress.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a dry dock foundation ditch structure that waterproof nature is good is provided, the quality of foundation ditch construction is improved.
The utility model provides a technical scheme that technical problem adopted is:
the dry dock foundation pit structure comprises a drainage ditch, a seepage-proofing wall and a foundation pit body which are sequentially arranged from outside to inside, wherein a plurality of vertical dewatering wells are arranged between the seepage-proofing wall and the foundation pit body, a side slope of the foundation pit body comprises a plurality of inclined slopes, two adjacent inclined slopes are connected through a horizontal slope placing platform, and a water accumulating ditch is arranged on the slope placing platform at the bottom of each inclined slope; the foundation pit is characterized in that a drainage mattress layer is laid at the bottom of the foundation pit body, a plurality of drainage pipes are arranged in the drainage mattress layer, and a concrete layer is arranged on the upper surface of the drainage mattress layer.
Furthermore, a plurality of water accumulating wells are arranged on each slope-releasing platform, the distance between every two adjacent water accumulating wells is 30-40 m, and the water accumulating ditch is communicated with the water accumulating wells; the depth of the water accumulation well of the lower layer slope-laying platform is greater than that of the upper layer slope-laying platform.
Further, the gradient of the inclined slope is 0.5.
Furthermore, a gravel layer is paved at the bottom of the water accumulation well, and a wood board is arranged on the side wall of the water accumulation well.
Further, the side wall and the bottom of the water accumulation ditch are coated with mortar layers or provided with wood boards.
Furthermore, the inner diameter of the dewatering well is larger than or equal to 600mm, and the distance between the centers of two adjacent dewatering wells is smaller than or equal to 25 m.
Furthermore, a steel wire mesh is laid on the inclined slope and the slope-releasing platform, and a mortar layer is arranged on the steel wire mesh.
Further, the inclined slope is 5.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a build the cut-off wall, dig the escape canal, dig precipitation well, dig measures such as ponding ditch, ensure in the foundation ditch work progress, prevent rainwater, groundwater, surface water etc. and get into the foundation ditch and produce ponding, make the construction go on normally in succession, be favorable to improving the efficiency of construction, guarantee construction quality.
Drawings
Fig. 1 is an overall schematic plan view of a dry dock foundation pit structure of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic sectional view of the foundation pit structure of the dry dock according to the present invention;
FIG. 4 is an enlarged view of portion B of FIG. 3;
FIG. 5 is an enlarged view of portion C of FIG. 3;
reference numerals: 1-impervious wall; 2-a drainage ditch; 3, inclining a slope; 4, putting a slope platform; 5-water accumulation ditch; 6, dewatering well; 7-drainage mattress layer; 8, a water drainage pipe; 9-concrete layer; 10-water collecting well; 20, a foundation pit body.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The utility model discloses a dry dock foundation ditch structure, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, include escape canal 2, cut-off wall 1 and foundation ditch body 20 that set gradually from outside to inside, be provided with a plurality of vertical precipitation wells 6 between cut-off wall 1 and the foundation ditch body 20, the side slope of foundation ditch body 20 includes a plurality of sloping 3, links to each other through horizontal putting sloping platform 4 between two adjacent sloping 3, be provided with ponding ditch 5 on the putting sloping platform 4 of sloping 3 bottom; the bottom of foundation ditch body 20 has laid drainage mattress layer 7, is provided with a plurality of drain pipes 8 in drainage mattress layer 7, and the upper surface of drainage mattress layer 7 is provided with concrete layer 9.
The drainage ditch 2 and the impervious wall 1 are both closed rings and surround the foundation pit body 20, so that good water blocking and drainage effects are achieved. The bottom of the impervious wall 1 reaches the impervious layer, so that water in an external stratum can be ensured to permeate into the interior of the impervious wall 1 from the bottom of the impervious wall 1, and the waterproof effect is improved. The 2 distance cut-off wall of escape canal about 1m, can also dig a plurality of ponding ponds, make the hydroenergy in the escape canal 2 enough flow into the ponding pond, when raining and lead to earth's surface rivers, rivers flow in escape canal 2 to inside the rivers of avoiding the earth's surface to flow into the foundation ditch.
The drainage mattress layer 7 and the drainage pipe 8 are used for draining water in soil below the bottom of the foundation pit and preventing the concrete layer 9 from seeping water.
After water in the soil layer around the foundation pit construction area permeates into the precipitation well 6, the water flows downwards along the precipitation well 6, so that the water content in the soil is reduced. Specifically, the inner diameter of each dewatering well 6 is larger than or equal to 600mm, the distance between the centers of two adjacent dewatering wells 6 is smaller than or equal to 25m, and the bottom of each dewatering well 6 is positioned below the bottom of the foundation pit by 6m, so that a better dewatering effect is ensured. The bottom of the dewatering well 6 is provided with a filter pipe with the length not less than 5m and a settling pipe with the length not less than 1 m. And the dewatering well 6 continuously reduces the water in the excavation process of the foundation pit, and the water surface in the dewatering well 6 is required to be lower than the elevation of the bottom of the foundation pit by more than 500 mm.
The slope of slope 3 is between 0.35 to 0.7, and is confirmed according to the geological conditions, and is preferred, the utility model discloses the slope of slope 3 is 0.5, and quantity is 5.
The bottom of ponding well 10 has laid the metalling, and the metalling plays the effect of protection ponding well 10 bottom surface, avoids being strikeed by rivers and the pit appears, and the lateral wall of ponding well 10 is provided with the plank, avoids ponding well 10 lateral wall to receive the washing away of rivers and collapse. The side wall and the bottom of the ponding ditch 5 are coated with mortar layers or provided with wood boards, so that the protective effect is achieved, and the side wall and the bottom of the ponding ditch 5 are prevented from being damaged due to water flow impact. The inclined slope 3 and the slope-releasing platform 4 are paved with steel wire meshes, and the steel wire meshes are provided with mortar layers to prevent slope sand from generating erosion under the action of wind, rainwater and mechanical vibration.
The construction method of the dry dock foundation pit structure comprises the following steps:
A. and building the impervious wall 1 outside the foundation pit construction area, wherein the impervious wall 1 surrounds the foundation pit construction area, and the bottom of the impervious wall 1 reaches the impervious layer. And determining the position of the impervious wall 1 according to the construction area of the foundation pit, so that the distance from the impervious wall 1 to the edge of the foundation pit is moderate. The impervious wall 1 adopts a wall plate type concrete continuous wall, adopts a hydraulic grab trenching machine to grab soil, simultaneously injects slurry to protect the wall of the groove hole, and pours concrete into the groove to form the wall after digging to the designed depth. The bottom of the impervious wall 1 reaches the impervious layer, so that water in an external stratum can be ensured to permeate into the interior of the impervious wall 1 from the bottom of the impervious wall 1, and the waterproof effect is improved.
B. And digging a drainage ditch 2 on the ground surface outside the impervious wall 1. The 2 distance cut-off wall of escape canal about 1m, can also dig a plurality of ponding ponds, make the hydroenergy in the escape canal 2 enough flow into the ponding pond, when raining and lead to earth's surface rivers, rivers flow in escape canal 2 to inside the rivers of avoiding the earth's surface to flow into the foundation ditch.
C. And digging a plurality of vertical precipitation wells 6 between the impervious wall 1 and the foundation pit construction area. Because the water permeability coefficient is larger adjacent to the seaside, the precipitation well 6 is used for precipitation, and water in the soil layer around the foundation pit construction area flows downwards along the precipitation well 6 after permeating into the precipitation well 6, so that the water content in the soil is reduced. Specifically, the inner diameter of each dewatering well 6 is larger than or equal to 600mm, the distance between the centers of two adjacent dewatering wells 6 is smaller than or equal to 25m, and the bottom of each dewatering well 6 is positioned below the bottom of the foundation pit by 6m, so that a better dewatering effect is ensured. The bottom of the dewatering well 6 is provided with a filter pipe with the length not less than 5m and a settling pipe with the length not less than 1 m. And the dewatering well 6 continuously reduces the water in the excavation process of the foundation pit, and the water surface in the dewatering well 6 is required to be lower than the elevation of the bottom of the foundation pit by more than 500 mm.
D. And (6) excavating a foundation pit. And excavating and carrying soil by using an excavating machine. The side slope of foundation ditch is multistage side slope, and multistage side slope includes a plurality of sloping slope 3, and two adjacent sloping slopes 3 link to each other through horizontally putting sloping platform 4, and the quantity of sloping slope 3 specifically is 5 levels, and the sloping slope 3 of the top links to each other with the earth's surface, and the sloping slope 3 of below links to each other with the foundation ditch bottom. The side slope is designed into a multistage side slope, so that the slope of the side slope is reduced, and the risk of side slope collapse can be reduced. After finishing the construction of one inclined slope 3 or the slope platform 4, a steel wire mesh is paved on the inclined slope 3 or the slope platform 4, and then sand pulp is sprayed to prevent the side slope sand from generating the flow erosion phenomenon under the action of wind, rainwater and mechanical vibration, thereby playing the roles of protecting the slope and preventing the side slope from collapsing and sliding.
When heavy rain falls, the rainwater can flow to putting sloping platform 4 along slope 3 on, then form ponding in the foundation ditch, influence the construction quality of construction progress and foundation ditch, therefore, every time dig out one put sloping platform 4 after, dig ponding ditch 5 on putting sloping platform 4 of slope 3 bottoms, the 5 degree of depth of ponding ditch is 500mm, the width is 500mm, when the rainwater flows down from slope 3, can get into ponding ditch 5, can not produce ponding in the foundation ditch, can guarantee the normal clear of construction.
In order to increase the water storage capacity, a water accumulation well 10 is dug on each slope platform 4 every 30-40 m, a water accumulation ditch 5 is communicated with the water accumulation well 10, the opening part of the water accumulation well 10 is 800 mm-800 mm square, the depth is more than 500mm, and the depth of the water accumulation well 10 of the lower slope platform 4 is more than that of the water accumulation well 10 of the upper slope platform 4. In order to ensure that the water in the gutter 5 can flow into the catch basin 10, the bottom surface of the gutter 5 may be sloped.
In order to prevent water flow from washing the side walls and the bottom walls of the water accumulation ditches 5 and the water accumulation wells 10, mortar is smeared on the side walls and the bottoms of the water accumulation ditches 5 or wood boards are paved on the side walls and the bottoms of the water accumulation ditches 5, the well walls of the water accumulation wells 10 are reinforced by the wood boards, and gravel layers are paved on the bottoms of the water accumulation wells 10. The side walls and the bottom walls of the water accumulation ditch 5 and the water accumulation well 10 are protected, the side walls and the bottom walls of the water accumulation ditch 5 and the water accumulation well 10 are prevented from being directly washed by water flow, the side walls of the water accumulation ditch 5 and the water accumulation well 10 are prevented from being washed down, and the bottom walls of the water accumulation ditch 5 and the water accumulation well 10 are prevented from being washed out of a pit.
Mechanical equipment weight who digs the pit is big, produces great vibrations during the operation, may cause the disturbance to the basement soil, consequently, utilizes machinery earlier to dig the foundation ditch, when machinery digs to apart from foundation ditch bottom elevation 300mm, utilizes the manual work to clear the end, clear end adoption spade shovel soil, the sand and soil that the end produced of clearing is transported out through the handcart, can avoid machinery destruction basement original state soil and the phenomenon of digging excessively to appear.
E. After the foundation pit is excavated, the drainage mattress layer 7 is laid at the bottom of the foundation pit as soon as possible, and the bearing capacity is prevented from being influenced by long-time exposure or rainwater soaking at the bottom of the foundation pit. The drainage mattress layer 7 is internally provided with a drainage pipe 8, the drainage pipe 8 is pre-embedded in the drainage mattress layer 7, and then a concrete layer 9 is poured on the upper surface of the drainage mattress layer 7.
In the above-mentioned work progress, owing to built impervious wall 1, dug escape canal 2, precipitation well 6, ponding ditch 5 and ponding well 10 simultaneously, can the separation and drain away the outside water of foundation ditch, reduce the rainwater that flows into the foundation ditch bottom simultaneously, play good waterproof, drainage effect, avoid in the work progress, the inside large-scale ponding that appears of foundation ditch influences the condition of construction progress and construction quality.
Claims (8)
1. The dry dock foundation pit structure is characterized by comprising a drainage ditch (2), an impervious wall (1) and a foundation pit body (20) which are sequentially arranged from outside to inside, wherein a plurality of vertical dewatering wells (6) are arranged between the impervious wall (1) and the foundation pit body (20), a side slope of the foundation pit body (20) comprises a plurality of inclined slopes (3), two adjacent inclined slopes (3) are connected through a horizontal slope placing platform (4), and a water accumulating ditch (5) is arranged on the slope placing platform (4) at the bottom of each inclined slope (3); a drainage mattress layer (7) is laid at the bottom of the foundation pit body (20), a plurality of drainage pipes (8) are arranged in the drainage mattress layer (7), and a concrete layer (9) is arranged on the upper surface of the drainage mattress layer (7).
2. The foundation pit structure of the dry dock according to claim 1, wherein a plurality of water accumulation wells (10) are arranged on each sloping platform (4), the distance between two adjacent water accumulation wells (10) is 30-40 m, and the water accumulation ditch (5) is communicated with the water accumulation wells (10); the depth of the water accumulation well (10) of the lower-layer slope-laying platform (4) is greater than that of the water accumulation well (10) of the upper-layer slope-laying platform (4).
3. A dry dock foundation pit structure according to claim 1, wherein the slope of the inclined slope (3) is 0.5.
4. A dry dock foundation pit structure as claimed in claim 2, wherein the bottom of the water trap (10) is paved with a gravel layer and the side wall of the water trap (10) is provided with a wooden board.
5. A dry dock foundation pit structure according to claim 1, wherein the side walls and bottom of the catchment ditch (5) are coated with a mortar layer or provided with a wooden board.
6. The dry dock foundation pit structure according to claim 1, wherein the inner diameter of the dewatering well (6) is greater than or equal to 600mm, and the distance between the centers of two adjacent dewatering wells (6) is less than or equal to 25 m.
7. A dry dock foundation pit structure as claimed in claim 1, wherein the inclined slope (3) and the sloping platform (4) are overlaid with a steel wire mesh, and the steel wire mesh is provided with a mortar layer.
8. A dry dock foundation pit structure according to claim 1, wherein the inclined slopes (3) are 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920601125.8U CN210031827U (en) | 2019-04-28 | 2019-04-28 | Dry dock foundation pit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920601125.8U CN210031827U (en) | 2019-04-28 | 2019-04-28 | Dry dock foundation pit structure |
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| CN210031827U true CN210031827U (en) | 2020-02-07 |
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| CN201920601125.8U Active CN210031827U (en) | 2019-04-28 | 2019-04-28 | Dry dock foundation pit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055972A (en) * | 2019-04-28 | 2019-07-26 | 中国电建集团山东电力建设有限公司 | Dry dock foundation ditch construction method and dry dock foundation pit structure |
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- 2019-04-28 CN CN201920601125.8U patent/CN210031827U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055972A (en) * | 2019-04-28 | 2019-07-26 | 中国电建集团山东电力建设有限公司 | Dry dock foundation ditch construction method and dry dock foundation pit structure |
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