CN211368725U - Face sea deep basal pit structure - Google Patents
Face sea deep basal pit structure Download PDFInfo
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- CN211368725U CN211368725U CN201922136209.1U CN201922136209U CN211368725U CN 211368725 U CN211368725 U CN 211368725U CN 201922136209 U CN201922136209 U CN 201922136209U CN 211368725 U CN211368725 U CN 211368725U
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Abstract
The utility model discloses a face sea deep basal pit structure, including lower foundation ditch, packway, upper mounting plate and a plurality of water drainage channel, lower foundation ditch, packway and upper mounting plate's height risees in proper order, packway and upper mounting plate all follow lower foundation ditch periphery setting, packway and lower foundation ditch are connected through lower protection side slope, connect through last protection side slope between upper mounting plate and the packway, the packway is being close to last protection side slope one side and is being equipped with the ditch of draining, lower foundation ditch is being close to lower protection side slope one side and is being equipped with down the ditch of draining, the water drainage channel is used for connecting escape canal and lower ditch of draining, the foundation ditch is equipped with the sump pit at escape canal and lower ditch junction down, the packway is equipped with the well at escape canal and last ditch junction of draining. The utility model discloses a precipitation is with low costs, the short advantage of construction period.
Description
Technical Field
The utility model relates to a civil engineering technical field especially relates to a face sea deep basal pit structure.
Background
The size of an underground part excavation plane of an existing circulating water pump room is 37.30m multiplied by 23.50m, the elevation of the bottom of a foundation is EL-6.85m, and the elevation of a designed ground is EL3.4m; the deep foundation pit is adjacent to the inner sea, and the nearest distance is about 13.8 meters; the geological condition is complicated, the groundwater level is high, the construction cost of the traditional dewatering scheme is high, and the construction period is long.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a precipitation with low costs, construction period is short faces sea deep basal pit structure.
In order to solve the technical problem, the utility model discloses specifically adopt following technical scheme:
the utility model provides a face sea deep basal pit structure, includes lower foundation ditch, packway, upper mounting plate and a plurality of water drainage way, the height of lower foundation ditch, packway and upper mounting plate risees in proper order, packway and upper mounting plate all follow the peripheral setting of lower foundation ditch, packway and lower foundation ditch are connected through protecting the side slope down, connect through last protection side slope between upper mounting plate and the packway, the packway is being close to upper protection side slope one side and is being equipped with the ditch of going up, the foundation ditch is being close to lower protection side slope one side and is being equipped with down the ditch of going up down, the water drainage way is used for connecting escape canal and ditch down, the foundation ditch is equipped with the sump pit under water drainage way and the ditch junction of going up down, the packway is equipped with the well in escape canal and the ditch junction.
As a further improvement of the above technical solution:
the drainage channel comprises a drainage pipe and a drainage groove communicated with the drainage pipe, the drainage pipe is embedded in the packway and communicated with the upper drainage ditch, and the drainage groove is arranged on the lower protection side slope and communicated with the lower drainage ditch.
And one side of the water collecting well at the lower protection side slope and one side close to the lower foundation pit are provided with wooden piles.
The upper protection side slope and the lower protection side slope are both color strip cloth slope protection.
The side slope ratio of the upper protection side slope to the lower protection side slope is 1: 2.
the height of the middle part of the lower foundation pit is higher than that of the edge part of the lower foundation pit.
On a plane vertical to the lower foundation pit, a connecting line between a projection point at the middle part of the lower foundation pit and a projection point at the edge part of the lower foundation pit forms an included angle alpha with a horizontal line, wherein the alpha is more than 0 degree and less than or equal to 2 degrees.
The height of the middle part of the horse way is larger than the height of the edge part of the horse way close to one side of the drainage ditch.
On a plane vertical to the fairway, a connecting line between a projection point at the middle part of the fairway and a projection point at the edge part of the fairway forms an included angle beta with a horizontal line, wherein the beta is more than 0 degree and less than or equal to 2 degrees.
The width of the pavement is 5-12 m.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses under the prerequisite of guaranteeing near sea deep basal pit quality of structure and excavation safety, solve the problem with high costs of traditional precipitation schemes such as well point precipitation, according to actual place and geological conditions, through setting up the escape canal, the drain way, go up the drain ditch, lower drain ditch, the well that falls into water and the bright drainage measures such as sump pit, reduce the construction cost of traditional precipitation scheme, accelerate construction period, through 16 days construction period in order, from analysis such as excavation depth, process infiltration rate detection, fixed water pump regularly drainage record, finally affirmed the utility model discloses technical scheme feasibility and rationality.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
Fig. 4 is a schematic structural diagram of the downpipe well and the water collecting well of the present invention.
Fig. 5 is the utility model discloses the structure sketch map of foundation ditch and lower protection side slope down.
Fig. 6 is a schematic structural view of the berm, the upper protection side slope and the lower protection side slope of the present invention.
The reference numerals in the figures denote:
1. a lower foundation pit; 11. a lower drainage ditch; 12. a water collecting well; 2. A lower protective side slope; 21. a lower foundation pit road; 3. a horse way; 31. an upper drainage ditch; 32. a water dropping well; 4. upward protecting a side slope; 5. an upper platform; 51. water retaining ridges; 6. a water drain; 61. a drain pipe; 62. a water drainage groove.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.
Example 1:
as shown in fig. 1 to 6, the deep foundation pit structure near the sea of this embodiment, including lower foundation pit 1, berm 3, upper platform 5 and a plurality of water drainage channel 6, lower foundation pit 1, the height of berm 3 and upper platform 5 risees in proper order, berm 3 and upper platform 5 all set up along lower foundation pit 1 circumference, berm 3 and lower foundation pit 1 connect through protection slope 2 down, connect through upper protection slope 4 between upper platform 5 and the berm 3, berm 3 is equipped with drain 31 on being close to upper protection slope 4 one side, lower foundation pit 1 is equipped with drain 11 under being close to protection slope 2 one side down, drain 6 is used for connecting upper drainage ditch 31 and drain 11 down, lower foundation pit 1 is equipped with sump pit 12 at drain 6 and drain 11 junction down, berm 3 is equipped with drainage well 32 at drain 6 and drain 31 junction. The utility model provides a problem that traditional dewatering schemes such as well point dewatering are with high costs, according to actual place and geological conditions, set up bright drainage measures such as escape canal in one side that the packway is close to last protection side slope, reduce the construction cost of traditional dewatering scheme for construction period.
The drain channel 6 includes a drain pipe 61 and a drain groove 62 communicating with the drain pipe 61, the drain pipe 61 is embedded in the horse way 3 and communicates with the upper drain ditch 31, and the drain groove 62 is provided on the lower protective slope 2 and communicates with the lower drain ditch 11.
The sump pit 12 is provided with a timber pile at one side of the lower protection side slope 2 and one side close to the lower foundation pit 1.
The upper protection side slope 4 and the lower protection side slope 2 are both color strip cloth protection slopes.
The side slope ratio of the upper protection side slope 4 to the lower protection side slope 2 is 1: 2.
the height of the middle part of the lower foundation pit 1 is higher than that of the edge part of the lower foundation pit 2.
On a plane vertical to the lower foundation pit 1, a connecting line between a projection point at the middle part of the lower foundation pit 1 and a projection point at the edge part of the lower foundation pit 1 forms an included angle alpha with a horizontal line, wherein alpha is more than 0 degree and less than or equal to 2 degrees.
The height of the middle part of the horse way 3 is larger than the height of the edge part of the horse way 3 close to one side of the drainage ditch.
On a plane vertical to the horse way 3, a connecting line between a projection point of the middle part of the horse way 3 and a projection point of the edge part of the horse way 3 forms an included angle beta with the horizontal line, wherein the beta is more than 0 degree and less than or equal to 2 degrees.
The width of the horse way 3 is 5-12 m.
And a water retaining bank 51 is arranged on one side of the upper platform 5 close to the upper protective side slope.
The size of an underground part excavation plane of the circulating water pump house is 37.30m multiplied by 23.50m, the elevation of the bottom of the foundation is EL-6.85m, and the elevation of the designed ground is EL3.4m; the position of the circulating water pump room is below the sea level, backfilling is needed, the underground part is constructed after backfilling is carried out to the height of EL1.5m, and therefore the foundation excavation depth is 8.35m (EL1.5 m-EL-6.85 m). Belonging to a subsection project with larger danger beyond a certain scale. And (2) adopting a layered excavation mode during excavation, arranging a road at EL3.5m, wherein the width of the road is 5-12 m, arranging open drainage measures such as drainage ditches at the inner side of the road, and the like, using the road as a concrete pouring platform and a transportation channel, and playing a role in protecting a side slope in a segmented manner, wherein the side slope ratio is determined to be 1:2 according to actual geological conditions. 1. The construction sequence is as follows:
the excavation construction sequence of the circulating water pump house is as follows: excavation above EL-3.5m → trimming and protection of side slopes above EL-3.5m → PHC pipe pile construction → excavation below EL-3.5m → trimming and protection of side slopes below EL-3.5m → structural construction → backfill.
2. Excavation scheme
(1) Excavating to EL-3.5m according to a slope ratio of 1:2, arranging a packway 3 at EL-3.5m as a concrete pouring platform and a transportation channel, and considering that a concrete pump truck is adopted for concrete warehousing, wherein the longitudinal width of the packway 3 is 12m, and the width of the transportation channel of the packway 3 is 5 m; the slope ratio of the side slope is 1:2, and the distance between the slope toe and the side line of the structure is 3 m.
(2) And (4) after the excavation is carried out to EL-3.5m, finishing and protecting the side slope (namely the upper protection side slope 4) with the length of more than EL-3.5m, and then carrying out HPC tubular pile construction.
(3) After the PHC pipe pile construction is finished, the EL-3.5m below is excavated in two layers, and the layering thickness is not more than 2 m; before excavation, firstly cutting exposed pile heads, then excavating, and then cutting piles after each layer of excavation is finished; before the next layer of excavation, 50cm of sandy soil is backfilled in an equipment operation area, a 2cm thick steel plate is laid, and then the excavation is carried out, namely the excavation procedure of each layer is as follows: cutting off a pile head → backfilling with 50cm of sandy soil → paving a 2cm thick steel plate → excavating, and carrying out deformation observation on the PHC pile; meanwhile, in the process of digging downwards, temporary drainage ditches (namely the lower drainage ditches 11) and temporary water collecting pits (namely the water collecting wells 12) are arranged within the range of the opening line of the lower foundation pit 1, and drainage is firstly carried out and then excavation is carried out.
The excavation is planned to adopt 2 long arm excavators and 2 conventional excavators to cooperate the excavation, 4 tipper transports, and the earthwork after the excavation is transported to on-the-spot appointed place, and in the earthwork excavation process, measurement personnel monitor the pile foundation.
3. Construction road and carriageway 3 arrangement
(1) EL-3.5m road layout: two roads with the width of more than EL-3.5m are longitudinally arranged along the 12m wide pavement 3, the width of the road is 5m, the longitudinal slope is not more than 10 percent, 20cm thick sand gravel is paved on the pavement to be hardened, and an upper drainage ditch 31 is arranged on one side of the pavement 3, which is close to the upper protective side slope 4.
(2) EL-3.5m platform: and arranging roads along the platform 3 of the pavement, and paving steel plates on the platform.
4. Slope protection
(1) The side slope protection is covered by color strip cloth, a protective layer is reserved on the side slope in the downward excavation process, when an EL-3.5m packway 3 is excavated, the slope is repaired, the color strip cloth is covered and is firmly pressed by a sand bag, a lower foundation pit road 21, an upper drainage ditch 31 and a water falling well 32 are made, and the excavation below EL-3.5m is started after the construction of the gravel pile and the PHC pipe pile is completed; and (5) performing slope protection on the whole foundation pit by adopting the same method below EL-3.5 m.
(2) And (3) treating the local possible collapse by using the wooden piles and the sand bag, and preparing 500 wooden piles for standby.
4. Drainage scheme
(1) The foundation pit mainly considers rainwater drainage and foundation pit water seepage, and double guarantee coefficients are considered to configure the pumping equipment according to daily maximum rainfall and foundation pit water seepage. Press 420m3And/h, arranging water pumping equipment (comprising 1-2 sand discharge pumps).
(2) The drainage system consists of a water retaining ridge 51, a lower foundation pit road 21, an upper drainage ditch 31, a water collecting well 12 and a lower drainage ditch 11, and the outer drainage main ditch is determined on site according to the terrain.
(3) The lower foundation pit road 21 and the upper drainage ditch 31 are arranged in a sand bag and color stripe cloth mode, the water collecting well 12 is protected by a wood pile and a sand bag, and the lower drainage ditch 11 is protected by a sand bag; the sump 12 has a size of 3 × 2 × 1.5m (length × width × depth).
(4) A brick-built water falling well 32 (with the size of 1 multiplied by 1 m) is arranged at the corner of the horse way 3, and a buried drain pipe 61 crosses the horse way 3 to lead the water in the water falling well 32 to the water collecting well 12.
(5) The water retaining ridges 51 are arranged on the periphery of the ground of the upper platform 5, and the color stripe cloth is laid downwards from the water retaining ridges 51.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a face sea deep basal pit structure which characterized in that: the foundation pit comprises a lower foundation pit (1), a berm (3), an upper platform (5) and a plurality of drainage channels (6), wherein the heights of the lower foundation pit (1), the berm (3) and the upper platform (5) are sequentially increased, the berm (3) and the upper platform (5) are arranged along the circumferential direction of the lower foundation pit (1), the berm (3) and the lower foundation pit (1) are connected through a lower protective side slope (2), the upper platform (5) and the berm (3) are connected through an upper protective side slope (4), the berm (3) is provided with an upper drainage channel (31) at one side close to the upper protective side slope (4), the lower foundation pit (1) is provided with a lower drainage channel (11) at one side close to the lower protective side slope (2), the drainage channels (6) are used for connecting the upper drainage channel (31) and the lower drainage channel (11), and the lower foundation pit (1) is provided with a water collecting well (12) at the joint of the drainage channels (6) and the lower drainage channel (11), and a water falling well (32) is arranged at the joint of the drainage channel (6) and the upper drainage ditch (31) of the horse way (3).
2. The sea-facing deep foundation pit structure of claim 1, wherein: the drainage channel (6) comprises a drainage pipe (61) and a drainage groove (62) communicated with the drainage pipe (61), the drainage pipe (61) is embedded in the horse way (3) and communicated with the upper drainage ditch (31), and the drainage groove (62) is arranged on the lower protection side slope (2) and communicated with the lower drainage ditch (11).
3. The sea-facing deep foundation pit structure of claim 1, wherein: and a timber pile is arranged on one side of the lower protection side slope (2) of the water collecting well (12) and one side of the water collecting well close to the lower foundation pit (1).
4. The sea-facing deep foundation pit structure of any one of claims 1 to 3, wherein: the upper protection side slope (4) and the lower protection side slope (2) are both color strip cloth protection slopes.
5. The sea-facing deep foundation pit structure of claim 4, wherein: the side slope ratio of the upper protection side slope (4) to the lower protection side slope (2) is 1: 2.
6. the sea-facing deep foundation pit structure of any one of claims 1 to 3, wherein: the middle part of the lower foundation pit (1) is higher than the edge part of the lower foundation pit (1).
7. The sea-facing deep foundation pit structure of claim 6, wherein: on a plane vertical to the lower foundation pit (1), a connecting line between a projection point at the middle part of the lower foundation pit (1) and a projection point at the edge part of the lower foundation pit (1) forms an included angle alpha with a horizontal line, wherein the alpha is more than 0 degree and less than or equal to 2 degrees.
8. The sea-facing deep foundation pit structure of any one of claims 1 to 3, wherein: the height of the middle part of the horse way (3) is larger than the height of the edge part of the horse way (3) close to one side of the drainage ditch.
9. The sea-facing deep foundation pit structure of claim 8, wherein: on a plane vertical to the fairway (3), a connecting line between a projection point of the middle part of the fairway (3) and a projection point of the edge part of the fairway (3) forms an included angle beta with the horizontal line, wherein the beta is more than 0 degree and less than or equal to 2 degrees.
10. The sea-facing deep foundation pit structure of claim 8, wherein: the width of the pavement (3) is 5-12 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922136209.1U CN211368725U (en) | 2019-12-03 | 2019-12-03 | Face sea deep basal pit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922136209.1U CN211368725U (en) | 2019-12-03 | 2019-12-03 | Face sea deep basal pit structure |
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| CN211368725U true CN211368725U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991159A (en) * | 2022-05-16 | 2022-09-02 | 中铁六局集团有限公司 | Subway station deep foundation pit riding track type rapid unearthing construction method |
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2019
- 2019-12-03 CN CN201922136209.1U patent/CN211368725U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991159A (en) * | 2022-05-16 | 2022-09-02 | 中铁六局集团有限公司 | Subway station deep foundation pit riding track type rapid unearthing construction method |
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