CN111021383B - Deep foundation pit pressure-bearing drainage device and application method thereof - Google Patents

Deep foundation pit pressure-bearing drainage device and application method thereof Download PDF

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Publication number
CN111021383B
CN111021383B CN201911219882.XA CN201911219882A CN111021383B CN 111021383 B CN111021383 B CN 111021383B CN 201911219882 A CN201911219882 A CN 201911219882A CN 111021383 B CN111021383 B CN 111021383B
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drainage
water
steel drum
bearing
pressure
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CN111021383A (en
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张志宏
袁升平
季先兵
岳齐贤
贾国强
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China MCC20 Group Corp Ltd
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China MCC20 Group Corp Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/10Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

The utility model provides a deep basal pit pressure-bearing drainage device, includes main well, drainage sleeve pipe, its characterized in that: the main well is a steel drum with the upper end and the lower end closed, an upper drainage pipe is arranged on a top sealing plate of the steel drum and communicated with a water suction pump, and a bottom sealing plate of the steel drum is provided with a plurality of communicating holes; the staving of steel drum is all equipped with the through-hole all around, the quantity of drainage sleeve pipe is the same with the quantity of the intercommunicating pore of end shrouding, and drainage sleeve pipe length is 2500 mm, the external diameter is 140mm, and drainage sleeve pipe's one end is fixed to be welded in the through-hole and makes drainage sleeve pipe and steel drum's end shrouding plane perpendicular, and drainage sleeve pipe's the other end is uncovered, and the drainage hole is densely covered on drainage sleeve pipe's opening end pipe wall. The pressure-bearing drainage device for the deep foundation pit and the use method thereof have the advantages of simple structure, convenience in manufacturing, safe and reliable drainage engineering quality, capability of effectively discharging piping effluent, guarantee of foundation pit construction safety, great construction period saving and reduction of engineering cost.

Description

Deep foundation pit pressure-bearing drainage device and application method thereof
Technical Field
The invention relates to a foundation pit drainage device, in particular to a deep foundation pit pressure-bearing drainage device and a use method thereof.
Background
In building construction, geological confined water has huge potential safety hazard to foundation pit construction. In construction, a method of draining water from a sump is generally used. The conventional water collecting well has small drainage quantity of a single drainage well and large underground pressure bearing water pipe surge quantity, and the drainage requirement can be met only by drilling a plurality of water collecting wells. In the underground confined water drainage construction, the content of silt, gravel and sand in the stratum of the coastal area of the drainage quantity is large, and a general water collecting well is adopted for drainage, so that the drainage pipe is easy to block.
Chinese patent CN106836232A discloses a method for digging to form an annular drainage ditch in 2017, 6.13.7.A ditch bottom is initially leveled and subjected to slope finding by using concrete; a pipeline with a hole is arranged in the drainage ditch; pebbles are stacked outside the water guide pipe in the drainage ditch, filled and completely covered, and geotextile is laid on the top surface of the pebble layer; after the geotextile of the drainage ditch is laid, the upper mattress layer construction can be carried out; a water collecting well is arranged in the water collecting pit, and the end heads of the water guide pipes are communicated with the inside of the water collecting well; arranging and installing all water guide pipes introduced into the water collecting well, and reserving a water suction end pipeline used by a self-sucking pump; and installing a self-priming water pump. The construction process can drain water continuously in the foundation construction stage by arranging the drainage ditch in the foundation bearing layer in a concealed mode. Although the construction process can realize continuous drainage in the foundation construction stage by arranging the drainage ditch in the foundation bearing layer in a concealed manner, the excavation amount of the annular drainage ditch is large, the construction progress is slow, and the piping amount of the underground pressure-bearing water is large and cannot meet the drainage requirement.
Therefore, the known foundation pit pressure-bearing drainage mode has various inconveniences and problems.
Disclosure of Invention
The invention aims to provide a safe and reliable deep foundation pit pressure-bearing drainage device.
The invention also aims to provide a safe and reliable use method of the pressure-bearing drainage device for the deep foundation pit.
In order to achieve the purpose, the technical solution of the invention is as follows:
the utility model provides a deep basal pit pressure-bearing drainage device, includes main well, drainage sleeve pipe, its characterized in that:
the main well is a steel drum with the upper end and the lower end closed, an upper drainage pipe is arranged on a top sealing plate of the steel drum and communicated with a water suction pump, and a bottom sealing plate of the steel drum is provided with a plurality of communicating holes; the periphery of the barrel body of the steel barrel is provided with through holes, and the aperture of each through hole is more than or equal to 30 mm;
the quantity of drainage sleeve pipe is the same with the quantity of the intercommunicating pore of end shrouding, and drainage sleeve pipe length is 2500 mm, and the external diameter is 140mm, and drainage sleeve pipe's one end fixed weld makes drainage sleeve pipe and steel drum's end shrouding plane perpendicular in the through-hole, and drainage sleeve pipe's the other end is uncovered, and drainage hole is densely covered on drainage sleeve pipe's the uncovered end pipe wall.
The deep foundation pit pressure-bearing drainage device can be further realized by adopting the following technical measures.
According to the pressure-bearing drainage device for the deep foundation pit, the radius of the steel drum is more than or equal to 600mm, and the height of the steel drum is more than or equal to 1500 mm.
According to the pressure-bearing drainage device for the deep foundation pit, the number of the through holes of the bottom sealing plate of the steel drum is four, and each through hole is communicated with one drainage sleeve.
According to the pressure-bearing drainage device for the deep foundation pit, the aperture of the water filtering hole is more than or equal to 30 mm.
According to the pressure-bearing drainage device for the deep foundation pit, the total height of the drainage holes is less than or equal to 150 mm.
A use method of a pressure-bearing drainage device of a deep foundation pit is characterized by comprising the following steps:
a. arranging the pressure-bearing drainage device near a pressure-bearing water piping point, wherein the bottom of the pressure-bearing drainage device is lower than the top elevation of the foundation pit bottom plate, and firmly fixing the pressure-bearing drainage device on the foundation pit bottom plate;
b. filling crushed stone between the main well and the drainage casing;
c. connecting a drain pipe connected with a water pump with a main well;
d. starting a water pump to pump water, starting construction of the underground part of the foundation pit after the water pumping is stable, and pressing a confined water head by the quality of a building without piping;
e. stopping pumping water, cutting off the drainage sleeve which is flush with the height of the main well, and filling broken stones into the drainage sleeve of the main well;
f. and pouring concrete, namely pouring the whole pressure-bearing water drainage well into the concrete floor.
The use method of the deep foundation pit pressure-bearing drainage device can be further realized by adopting the following technical measures.
The method is characterized in that the water pumping is continuously carried out during the period that the building body quality can be pressed against the confined water head.
After the technical scheme is adopted, the deep foundation pit pressure-bearing drainage device and the use method thereof have the following advantages:
1. the pressure-bearing drainage device has simple structure and convenient manufacture;
2. the quality of the drainage engineering is safe and reliable, the piping water can be effectively discharged, and the construction safety of the foundation pit is ensured;
3. the construction period can be greatly saved, and the engineering cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a deep foundation pit pressure-bearing drainage device in an embodiment of the invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of a drain sleeve according to an embodiment of the present invention.
In the figure: 1 steel drum, 2 through holes, 3 steel pipes and 4 water filtering holes.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The invention relates to a pressure-bearing drainage device for a deep foundation pit.
Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a deep foundation pit pressure-bearing drainage device according to an embodiment of the present invention, and fig. 2 is a top view of fig. 1. As shown in the figure, the main well is upper and lower end confined steel drum 1, and the top shrouding of steel drum is equipped with the drain pipe (not shown in the figure), and the drain pipe is connected with the suction pump on going up, and the bottom shrouding of steel drum is equipped with four intercommunicating pores, the intercommunicating pore quantity of the bottom shrouding of steel drum is four, and each through-hole communicates with a drainage sleeve pipe. The periphery of the barrel body of the steel barrel is provided with through holes, and the aperture of each through hole is 30 mm; the radius of steel drum is 600mm, and the height is 1500 mm.
The quantity of drainage sleeve pipe is the same with the quantity of the intercommunicating pore of end shrouding, and drainage sleeve pipe length is 2500 mm, and the external diameter is 140mm, and drainage sleeve pipe's one end fixed weld makes drainage sleeve pipe and steel drum's end shrouding plane perpendicular in the through-hole, and drainage sleeve pipe's the other end is uncovered, and drainage sleeve pipe's opening end pipe wall is covered closely and is covered with the drainage hole, drainage hole aperture is 30 mm. The total height of the water filtering holes is less than or equal to 150 mm. Fig. 3 is a schematic structural view of a drain sleeve according to an embodiment of the present invention.
Example 2
The use method of the deep foundation pit pressure-bearing drainage device comprises the following steps:
a. and arranging the pressure-bearing drainage device near the pressure-bearing water piping point, wherein the bottom of the pressure-bearing drainage device is lower than the elevation of the top of the foundation pit bottom plate, and the pressure-bearing drainage device is firmly fixed on the foundation pit bottom plate.
b. And filling broken stones between the main well and the drainage casing.
c. The water discharge pipe connected with a water suction pump is connected with the upper water discharge pipe of the main well.
d. Starting a water pump to pump water, starting construction of the underground part of the foundation pit after the water pumping is stable, and pressing a confined water head by the quality of a building without piping; the water pumping can be continuously carried out during the period that the building body quality can press the confined water head.
e. Stopping pumping water, cutting off the drainage sleeve at the same height with the main well, and filling broken stones into the drainage sleeve of the main well.
f. And pouring concrete, namely pouring the whole pressure-bearing water drainage well into the concrete floor.
The deep foundation pit pressure-bearing drainage device and the use method thereof have the advantages that the piping effluent can be effectively discharged in the pressure-bearing water drainage, the safety of foundation pit construction is ensured, the deep foundation pit pressure-bearing drainage device can be directly poured into a basement bottom plate after the drainage is finished, the construction is convenient, the construction period can be greatly saved, and the construction cost is reduced.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.

Claims (3)

1. The utility model provides a deep basal pit pressure-bearing drainage device, includes main well, drainage sleeve pipe, its characterized in that:
the main well is a steel drum with the upper end and the lower end closed, an upper drainage pipe is arranged on a top sealing plate of the steel drum and communicated with a water suction pump, and a bottom sealing plate of the steel drum is provided with a plurality of communicating holes; the periphery of the barrel body of the steel barrel is provided with through holes, and the aperture of each through hole is more than or equal to 30 mm;
the number of the drainage sleeves is the same as that of the communication holes of the bottom sealing plate, the length of each drainage sleeve is 2500 mm, the outer diameter of each drainage sleeve is 140mm, one end of each drainage sleeve is fixedly welded to the communication hole to enable the drainage sleeve to be perpendicular to the plane of the bottom sealing plate of the steel drum, the other end of each drainage sleeve is open, water filtering holes are densely distributed in the pipe wall of the open end of each drainage sleeve, the radius of the steel drum is larger than or equal to 600mm, the height of the steel drum is larger than or equal to 1500mm, the number of the communication holes of the bottom sealing plate of the steel drum is four, each communication hole is communicated with one drainage sleeve, the aperture of each water filtering hole is larger than.
2. The use method of the deep foundation pit pressure-bearing drainage device according to claim 1, characterized by comprising the following steps:
a. arranging the pressure-bearing drainage device near a pressure-bearing water piping point, wherein the bottom of the pressure-bearing drainage device is lower than the top elevation of the foundation pit bottom plate, and firmly fixing the pressure-bearing drainage device on the foundation pit bottom plate;
b. filling crushed stone between the main well and the drainage casing;
c. connecting an upper drainage pipe connected with a water suction pump with a main well;
d. starting a water pump to pump water, starting construction of the underground part of the foundation pit after the water pumping is stable, and pressing a confined water head by the quality of a building without piping;
e. stopping pumping water, cutting off the pipe arranged on the top sealing plate of the steel drum, and filling broken stones into the drainage sleeve of the main well;
f. and (4) pouring concrete, namely pouring the whole pressure-bearing drainage device into the concrete bottom plate.
3. The use method of the confined drainage system of the deep foundation pit as claimed in claim 2, wherein the water pumping is continuously carried out during the period that the building body mass can press the confined water head.
CN201911219882.XA 2019-12-03 2019-12-03 Deep foundation pit pressure-bearing drainage device and application method thereof Active CN111021383B (en)

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Application Number Priority Date Filing Date Title
CN201911219882.XA CN111021383B (en) 2019-12-03 2019-12-03 Deep foundation pit pressure-bearing drainage device and application method thereof

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CN111021383B true CN111021383B (en) 2021-06-01

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201794082U (en) * 2010-06-30 2011-04-13 中国华冶科工集团有限公司 Local precipitation and drainage device for deep foundation pit
CN205259200U (en) * 2015-12-09 2016-05-25 浙江科技学院 Foundation ditch confined aquifer precipitation well plugging device
CN108487276A (en) * 2018-04-27 2018-09-04 陕西建工机械施工集团有限公司 A kind of embed-type shallow-layer combined water drain pipe and construction method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201794082U (en) * 2010-06-30 2011-04-13 中国华冶科工集团有限公司 Local precipitation and drainage device for deep foundation pit
CN205259200U (en) * 2015-12-09 2016-05-25 浙江科技学院 Foundation ditch confined aquifer precipitation well plugging device
CN108487276A (en) * 2018-04-27 2018-09-04 陕西建工机械施工集团有限公司 A kind of embed-type shallow-layer combined water drain pipe and construction method

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