CN114016511A - Excavation system of deep foundation pit and excavation construction method of deep foundation pit - Google Patents
Excavation system of deep foundation pit and excavation construction method of deep foundation pit Download PDFInfo
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- CN114016511A CN114016511A CN202111394506.1A CN202111394506A CN114016511A CN 114016511 A CN114016511 A CN 114016511A CN 202111394506 A CN202111394506 A CN 202111394506A CN 114016511 A CN114016511 A CN 114016511A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/20—Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides an excavation system of a deep foundation pit and an excavation construction method of the deep foundation pit, wherein the excavation system comprises a diaphragm wall, a water storage tank, a high-pressure water pump, a high-pressure water gun, a mud pump and a mud pit. The diaphragm wall is arranged around the foundation pit to be excavated; the water storage tank is connected with the high-pressure water pump through a pipeline; the water inlet of the high-pressure water pump is connected with the water storage tank through a pipeline, and the water outlet of the high-pressure water pump is connected with the high-pressure water gun through a pipeline; the high-pressure water gun is connected with the water outlet of the high-pressure water pump through a pipeline; the mud pump has pipeline connected to the water inlet and the water outlet, pipeline connected to the water inlet and extending into the foundation pit, pipeline connected to the water outlet and extending into the mud collecting pond, and the mud collecting pond is set outside the foundation pit. The construction equipment is simple, excessive personnel investment is not needed, the digging efficiency of the deep foundation pit can be effectively improved, the construction cost is reduced, and the construction method has high practical application value.
Description
Technical Field
The invention relates to the field of building construction, in particular to an excavation system of a deep foundation pit and an excavation construction method of the deep foundation pit.
Background
At present, in the earthwork construction process of a deep foundation pit, a backhoe excavator is generally adopted to dig in the foundation pit, then the abandoned soil dug to establish the foundation pit is lifted out to an automobile outside the foundation pit by using a tower crane, the automobile on the ground is transported out of the field, and finally the backhoe excavator is lifted out from the dug foundation pit by a tower crane. However, in the actual operation process, supports are required to be arranged between the underground diaphragm walls around the foundation pit, the arranged supports are generally dense, and in order to prevent the backhoe from interfering with the supports, a small backhoe must be used for excavating the foundation pit. Therefore, the excavation time of the foundation pit is prolonged, and the construction efficiency of the foundation pit is affected.
Disclosure of Invention
The invention aims to provide an excavation system of a deep foundation pit, which aims to solve the problem that the existing backhoe excavator is poor in foundation pit excavation efficiency.
The invention also aims to provide an excavation construction method of the deep foundation pit, so as to reduce equipment investment and improve the construction efficiency of the foundation pit.
One of the objects of the invention is achieved by: an excavation system for a deep foundation pit, comprising:
the underground diaphragm wall is a continuous reinforced concrete wall built underground and is arranged around a foundation pit to be excavated so as to play roles in intercepting, preventing seepage and retaining water for the foundation pit;
the water storage tank is connected with the high-pressure water pump through a pipeline and used for providing a pumping water source for the high-pressure water pump so as to impact earthwork in the enclosed area of the diaphragm wall;
the water inlet of the high-pressure water pump is connected with the water storage tank through a pipeline, and the water outlet of the high-pressure water pump is connected with a high-pressure water gun through a pipeline and used for pumping water in the water storage tank and converting the water pumped from the water storage tank into high-pressure impact water;
the high-pressure water gun is connected with a water outlet of the high-pressure water pump through a pipeline and used for converting high-pressure impact water pumped by the high-pressure water pump into a high-pressure water column, and a constructor controls the impact direction of the high-pressure water column through the high-pressure water gun so that the high-pressure water column impacts earthwork in the area enclosed by the diaphragm wall and impacts the earthwork into slurry;
the mud pump, connect with the pipeline on its water inlet and water outlet, the pipeline port connected to water inlet stretches into the foundation ditch, the pipeline connected to water outlet stretches into the mud collecting pool, in order to suck the mud in the foundation ditch, and convey the mud sucked to the mud collecting pool through the pipeline; and
and the mud collecting pool is arranged outside the foundation pit area to be excavated and used for collecting the mud pumped by the mud pump.
And the high-pressure water gun is provided with a flow control switch for adjusting the size of the high-pressure water column so as to change the impact force of the high-pressure water column.
The second purpose of the invention is realized by the following steps: a construction method for excavating a deep foundation pit by using the excavation system for the deep foundation pit comprises the following steps:
a. measuring and setting out on the ground where the foundation pit is to be excavated by using a total station, and then excavating a guide wall groove for enclosing a ground connection wall around the foundation pit;
b. hoisting a reinforcing mesh sheet for pouring in the guide wall into the guide wall groove;
c. after the guide wall reinforcing mesh is installed, a guide wall template for pouring a guide wall is erected;
d. after the guide wall template is erected, pouring concrete into the guide wall template;
e. after the concrete is solidified, removing the guide wall template;
f. manufacturing guide wall filling slurry, and filling the slurry into the poured guide wall;
g. digging a groove for pouring the diaphragm wall between the guide walls by using a groover;
h. hoisting a reinforcement cage poured in the diaphragm wall into the groove of the diaphragm wall by using a truck crane;
i. then, placing a concrete guide pipe into the groove of the diaphragm wall by using a truck crane, wherein the concrete guide pipe is arranged in a reinforcement cage in the groove of the diaphragm wall in a penetrating manner;
j. after the concrete guide pipe is installed, pouring concrete into the groove of the underground diaphragm wall through the concrete guide pipe;
k. according to the steps g-j, all the diaphragm walls surrounding the foundation pit are poured, and concrete of the diaphragm walls is waited to be solidified;
after the concrete of the diaphragm wall is solidified, digging a mud collecting pool at a short distance from a foundation pit to be dug;
m, after the sludge collecting pool is dug, arranging a water storage tank, a high-pressure water pump and a high-pressure water gun, connecting a water inlet of the high-pressure water pump with a water outlet of the water storage tank through a pipeline, connecting a water outlet of the high-pressure water gun with the high-pressure water gun, introducing the pipeline connected with the water inlet of the sludge pump into an area of the foundation pit to be dug, and introducing the pipeline connected with the water outlet of the sludge pump into the sludge collecting pool;
n, injecting a certain amount of water for impacting earthwork into the water storage tank;
step o, excavating a pit groove of the foundation pit in a sectional mode from top to bottom, aligning a water outlet of a high-pressure water gun to the uppermost section of earthwork to be impacted, starting a high-pressure water pump, and impacting the uppermost section of earthwork in the area enclosed by the diaphragm wall into slurry by using a high-pressure water column sprayed by the high-pressure water gun;
p, starting a slurry pump, and pumping the slurry formed by impact into a slurry collection pool by the slurry pump through a pipeline;
q, closing the high-pressure water pump and the slurry pump, and arranging a plurality of cross supporting beams between the oppositely arranged underground diaphragm walls exposed in the foundation pit;
and r, repeating the steps o-q until the pit slot of the whole foundation pit is dug, and then pouring the foundation pit in the pit slot.
The invention sprays high-pressure water columns between the diaphragm walls surrounding the foundation pit, impacts earthwork between the diaphragm walls into flowable slurry, and pumps the slurry out through a slurry pump, thereby forming a pit slot of the foundation pit in the surrounding area of the diaphragm walls. The invention can quickly realize the earthwork excavation and transportation in the area surrounded by the diaphragm wall, and the excavation speed and the quality of the foundation pit are superior to those of the excavation quality of the traditional machine. In addition, the equipment used by the invention has low investment cost and does not need other huge construction equipment. The method is simple to operate, does not need excessive personnel allocation, and does not influence the construction of other surrounding projects.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. a mud collecting pool; 2. a slurry pump; 3. earthwork; 4. a high pressure water gun; 5. a high pressure water pump; 6. a water storage tank; 7. and (4) connecting the ground with the wall.
Detailed Description
The first embodiment is as follows: an excavation system for a deep foundation pit.
As shown in fig. 1, the invention comprises a diaphragm wall 7, a water storage tank 6, a high-pressure water pump 5, a high-pressure water gun 4, a mud pump 2 and a mud collecting tank 1, wherein the diaphragm wall 7 is a continuous reinforced concrete wall built underground and used for surrounding a foundation pit to be excavated and playing roles of intercepting, preventing seepage and retaining water for the foundation pit.
The water storage tank 6 is connected with the high-pressure water pump 5 through a pipeline and used for providing a pumping water source for the high-pressure water pump 5 so as to impact earthwork in the enclosed area of the diaphragm wall 7. The water inlet of the high-pressure water pump 5 is connected with the water storage tank through a pipeline, and the water outlet of the high-pressure water pump 5 is connected with the high-pressure water gun 4 through a pipeline and used for pumping water in the water storage tank 6 so as to change the water pumped from the water storage tank 6 into high-pressure impact water. The high-pressure water gun 4 is connected with a water outlet of the high-pressure water pump 5 through a pipeline and used for converting high-pressure impact water pumped by the high-pressure water pump 5 into a high-pressure water column, so that a constructor controls the impact direction of the high-pressure water column through the high-pressure water gun, the high-pressure water column impacts earthwork in the enclosed area of the diaphragm wall 7 and the earthwork is impacted into slurry.
The water inlet and the water outlet of the mud pump 2 are both connected with pipelines, the pipeline connected to the water inlet of the mud pump 2 extends into a foundation pit enclosed by the ground connecting wall 7 to pump mud in the foundation pit, and the pipeline connected to the water outlet of the mud pump 2 extends to the mud collecting pool 1 to convey the pumped mud to the mud collecting pool.
The mud collecting pool 1 is arranged outside a foundation pit area to be excavated and used for collecting mud pumped by the mud pump 2.
The high-pressure water gun 4 is provided with a flow control switch for adjusting the size of a high-pressure water column sprayed out of the high-pressure water gun 4 so as to change the impact force of the high-pressure water column.
Example two: an excavation construction method of a deep foundation pit.
The embodiment is a construction method for excavating a foundation pit by using the excavation system described in the first embodiment, and specifically includes the following steps:
a. the total station is used to measure the defence lines on the ground of the foundation pit to be excavated and then to excavate the guide wall trench which is used to enclose the diaphragm wall 7 around the foundation pit.
b. Then, a steel bar net piece poured in the guide wall is hung in the guide wall groove to enhance the strength of the guide wall.
c. And after the reinforcing mesh of the guide wall is installed, erecting a guide wall template for pouring the guide wall.
d. And after the guide wall template is erected, pouring concrete into the guide wall template.
e. And after the guide wall concrete is solidified, removing the guide wall template.
f. And (3) manufacturing filling slurry of the guide wall, and filling the slurry into a groove formed between the poured guide walls so as to prevent the guide wall from deforming when a forehead groove of the diaphragm wall 7 is dug.
g. Then, a groove for pouring the diaphragm wall 7 is dug between the guide walls by using a groover.
h. And hoisting the reinforcement cage poured in the diaphragm wall 7 into the groove of the dug diaphragm wall 7 by using a truck crane.
i. Then, a concrete guide pipe is arranged in the groove of the diaphragm wall 7 by using a truck crane, and the concrete guide pipe vertically penetrates through a reinforcement cage in the groove of the diaphragm wall 7.
j. After the concrete guide pipe is installed, concrete is poured into the groove of the underground diaphragm wall 7 through the concrete guide pipe.
k. And g, according to the step g-j, completely pouring the diaphragm walls 7 surrounding the foundation pit until the concrete of all the diaphragm walls 7 is solidified.
And l, after the concrete of the underground diaphragm wall 7 is solidified, digging and setting the mud collecting pool 1 at a short distance from the foundation pit to be dug.
m, after the sludge collecting pool 1 is dug, a water storage tank 6, a high-pressure water pump 5 and a high-pressure water gun 4 are arranged. The water inlet of the high-pressure water gun 4 is connected with the water outlet of the water storage tank 6 through a pipeline, the water outlet of the high-pressure water gun 4 is connected with the high-pressure water gun 4, the pipeline connected with the water inlet of the slurry pump 2 is communicated into an area to be dug and provided with a foundation pit, and finally the pipeline connected with the water outlet of the slurry pump 2 is communicated into the slurry collecting tank 1.
n, then injecting a certain amount of water which is used for impacting the earthwork into the water storage tank 6, wherein the water can be continuously filled after the water is little in the process of impacting the earthwork.
And o, the pit of the foundation pit is dug in a sectional manner from top to bottom, the water outlet of the high-pressure water gun 4 is aligned to the uppermost section of earthwork to be impacted, then the high-pressure water pump is started, so that the high-pressure water gun 4 sprays high-pressure water columns, and the high-pressure water columns impact the uppermost section of earthwork in the area enclosed by the diaphragm wall 7 into slurry.
And p, starting the slurry pump 2, sucking the slurry formed by impact in the area enclosed by the diaphragm wall 7 by the slurry pump 2 through a pipeline, and conveying the slurry into the slurry collecting tank 1.
And q, after the planned section of pit foundation is dug, closing the high-pressure water pump and the slurry pump, and arranging a plurality of cross supporting beams between the oppositely arranged underground diaphragm walls 7 exposed in the foundation pit so as to support the underground diaphragm walls 7 and prevent the underground diaphragm walls 7 from being affected by surrounding soil and sand, so that the underground diaphragm walls 7 are deformed or toppled.
And r, repeating the steps o-q until the pit slot of the whole foundation pit is dug, and then performing subsequent foundation pit pouring work in the pit slot.
Claims (3)
1. An excavation system for a deep foundation pit, comprising:
the underground diaphragm wall is a continuous reinforced concrete wall built underground and is arranged around a foundation pit to be excavated so as to play roles in intercepting, preventing seepage and retaining water for the foundation pit;
the water storage tank is connected with the high-pressure water pump through a pipeline and used for providing a pumping water source for the high-pressure water pump so as to impact earthwork in the enclosed area of the diaphragm wall;
the water inlet of the high-pressure water pump is connected with the water storage tank through a pipeline, and the water outlet of the high-pressure water pump is connected with a high-pressure water gun through a pipeline and used for pumping water in the water storage tank and converting the water pumped from the water storage tank into high-pressure impact water;
the high-pressure water gun is connected with a water outlet of the high-pressure water pump through a pipeline and used for converting high-pressure impact water pumped by the high-pressure water pump into a high-pressure water column, and a constructor controls the impact direction of the high-pressure water column through the high-pressure water gun so that the high-pressure water column impacts earthwork in the area enclosed by the diaphragm wall and impacts the earthwork into slurry;
the mud pump, connect with the pipeline on its water inlet and water outlet, the pipeline port connected to water inlet stretches into the foundation ditch, the pipeline connected to water outlet stretches into the mud collecting pool, in order to suck the mud in the foundation ditch, and convey the mud sucked to the mud collecting pool through the pipeline; and
and the mud collecting pool is arranged outside the foundation pit area to be excavated and used for collecting the mud pumped by the mud pump.
2. The excavation system of a deep foundation pit according to claim 1, wherein the high pressure water gun is provided with a flow control switch for adjusting the size of the high pressure water column to change the impact force of the high pressure water column.
3. A construction method for excavating a deep foundation pit using the excavation system for a deep foundation pit according to claim 1, comprising the steps of:
a. measuring and setting out on the ground where the foundation pit is to be excavated by using a total station, and then excavating a guide wall groove for enclosing a ground connection wall around the foundation pit;
b. hoisting a reinforcing mesh sheet for pouring in the guide wall into the guide wall groove;
c. after the guide wall reinforcing mesh is installed, a guide wall template for pouring a guide wall is erected;
d. after the guide wall template is erected, pouring concrete into the guide wall template;
e. after the concrete is solidified, removing the guide wall template;
f. manufacturing guide wall filling slurry, and filling the slurry into the poured guide wall;
g. digging a groove for pouring the diaphragm wall between the guide walls by using a groover;
h. hoisting a reinforcement cage poured in the diaphragm wall into the groove of the diaphragm wall by using a truck crane;
i. then, placing a concrete guide pipe into the groove of the diaphragm wall by using a truck crane, wherein the concrete guide pipe is arranged in a reinforcement cage in the groove of the diaphragm wall in a penetrating manner;
j. after the concrete guide pipe is installed, pouring concrete into the groove of the underground diaphragm wall through the concrete guide pipe;
k. according to the steps g-j, all the diaphragm walls surrounding the foundation pit are poured, and concrete of the diaphragm walls is waited to be solidified;
after the concrete of the diaphragm wall is solidified, digging a mud collecting pool at a short distance from a foundation pit to be dug;
m, after the sludge collecting pool is dug, arranging a water storage tank, a high-pressure water pump and a high-pressure water gun, connecting a water inlet of the high-pressure water pump with a water outlet of the water storage tank through a pipeline, connecting a water outlet of the high-pressure water gun with the high-pressure water gun, introducing the pipeline connected with the water inlet of the sludge pump into an area of the foundation pit to be dug, and introducing the pipeline connected with the water outlet of the sludge pump into the sludge collecting pool;
n, injecting a certain amount of water for impacting earthwork into the water storage tank;
step o, excavating a pit groove of the foundation pit in a sectional mode from top to bottom, aligning a water outlet of a high-pressure water gun to the uppermost section of earthwork to be impacted, starting a high-pressure water pump, and impacting the uppermost section of earthwork in the area enclosed by the diaphragm wall into slurry by using a high-pressure water column sprayed by the high-pressure water gun;
p, starting a slurry pump, and pumping the slurry formed by impact into a slurry collection pool by the slurry pump through a pipeline;
q, closing the high-pressure water pump and the slurry pump, and arranging a plurality of cross supporting beams between the oppositely arranged underground diaphragm walls exposed in the foundation pit;
and r, repeating the steps o-q until the pit slot of the whole foundation pit is dug, and then pouring the foundation pit in the pit slot.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111394506.1A CN114016511A (en) | 2021-11-23 | 2021-11-23 | Excavation system of deep foundation pit and excavation construction method of deep foundation pit |
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| CN202111394506.1A CN114016511A (en) | 2021-11-23 | 2021-11-23 | Excavation system of deep foundation pit and excavation construction method of deep foundation pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960814A (en) * | 2022-06-24 | 2022-08-30 | 广东省第四建筑工程有限公司 | Method for conveying solid sludge of deep foundation pit |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960814A (en) * | 2022-06-24 | 2022-08-30 | 广东省第四建筑工程有限公司 | Method for conveying solid sludge of deep foundation pit |
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Application publication date: 20220208 |