CN111350202A - Novel assembly type anchoring structure capable of being used as dewatering well and support and construction method - Google Patents
Novel assembly type anchoring structure capable of being used as dewatering well and support and construction method Download PDFInfo
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- CN111350202A CN111350202A CN202010260894.3A CN202010260894A CN111350202A CN 111350202 A CN111350202 A CN 111350202A CN 202010260894 A CN202010260894 A CN 202010260894A CN 111350202 A CN111350202 A CN 111350202A
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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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0001—Rubbers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- General Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
A novel assembled anchoring structure used as a dewatering well and a support and a construction method belong to the technical field of geotechnical engineering. The assembly type anchoring structure comprises a plurality of prefabricated general pipe pieces which are sequentially assembled, anchor rod grooves are reserved in the front and rear directions of the general pipe pieces, anchor rod holes can be formed after the adjacent general pipe pieces are assembled, bolt holes are reserved in the left and right directions of the general pipe pieces, precipitation well holes are reserved in the up and down directions of the general pipe pieces, anchor rods are driven into the foundation pit wall from the anchor rod holes to form anchor rod supports, and bolts are installed in the bolt holes to connect the adjacent general pipe pieces in the left and right directions; a water pumping steel pipe can penetrate through the dewatering well hole, the lower end of the water pumping steel pipe extends into the water layer, the upper end of the water pumping steel pipe is connected with a water collecting main pipe, and the water collecting main pipe is connected with a water pumping pump; elastic sealing gaskets are arranged between the adjacent universal pipe pieces in the up-down direction, and the elastic sealing gaskets are arranged between the adjacent universal pipe pieces in the left-right direction.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a novel fabricated anchoring structure serving as a dewatering well and a support and a construction method.
Background
Before the foundation pit is excavated, a certain number of dewatering wells are excavated around the foundation pit in advance according to calculation, and underground water is continuously pumped by using a water suction pump before excavation, so that the underground water level is reduced below the foundation pit, the soil body is promoted to be solidified, and the foundation strength is improved. However, well point method dewatering needs to drill a hole firstly, a pile casing needs to be applied to protect an orifice and the drilling is slowly carried out when the drill is lifted, collapse and blockage of the orifice are prevented, and then a well pipe, backfill stone and hole washing need to be placed, so that the process is complex and tedious, and engineering delay is easily caused.
The foundation pit support has various forms, such as soil nailing wall, underground continuous wall, cast-in-place pile support and the like. The underground continuous wall has high rigidity and good water stopping effect, so the underground continuous wall is used as the strongest supporting form in a supporting structure, but has higher requirement on a construction site, requires special equipment in the construction process, is influenced by the temperature and the humidity of site construction after being poured, is very easy to cause the cracking of a wall body, cannot achieve the water stopping effect, and is often matched with a water stopping curtain for treatment. This is a disadvantage in the prior art.
Disclosure of Invention
The invention aims to solve the technical problem that the defects of the prior art are overcome, and provides a novel assembly type anchoring structure and a construction method which are used as a dewatering well and a support, wherein the novel assembly type anchoring structure and the construction method are used in a foundation pit dewatering and support system.
The scheme is realized by the following technical measures: a novel assembly type anchoring structure doubling as a dewatering well and a support comprises a plurality of prefabricated general pipe pieces which are sequentially assembled, wherein anchor rod grooves are reserved in the front and rear directions of the general pipe pieces, anchor rod holes can be formed after the adjacent general pipe pieces are assembled, bolt holes are reserved in the left and right directions of the general pipe pieces, dewatering well holes are reserved in the up and down directions of the general pipe pieces, anchor rods are driven into foundation pit walls from the anchor rod holes to form anchor rod supports, and bolts are installed in the bolt holes to connect the adjacent general pipe pieces in the left and right directions; a water pumping steel pipe can penetrate through the dewatering well hole, the lower end of the water pumping steel pipe extends into the water layer, the upper end of the water pumping steel pipe is connected with a water collecting main pipe, and the water collecting main pipe is connected with a water pumping pump; elastic sealing gaskets are arranged between the adjacent universal pipe pieces in the up-down direction, and the elastic sealing gaskets are arranged between the adjacent universal pipe pieces in the left-right direction.
Preferably, the cross-section of general section of jurisdiction is right trapezoid structure, and the inclined plane concatenation of two adjacent general section of jurisdiction about in the direction is general section of jurisdiction group, and the concatenation seam parallel arrangement of two sets of adjacent general section of jurisdiction group has effectually guaranteed the stability that general section of jurisdiction was assembled in the upper and lower direction.
Preferably, the lower extreme of the steel pipe that draws water is provided with the filter screen, the upper end of the steel pipe that draws water is connected with the collecting main through the rubber tube. Be provided with the filter screen and can play the filter effect, set up the rubber tube and conveniently draw water the steel pipe and be connected with the collecting main, the rubber tube guarantees to draw water good gas tightness between steel pipe and the collecting main.
Preferably, the height of general section of jurisdiction is 3m, and the upper short side is 2m, and the lower short side is 3m, and thickness is 1.2m, the diameter of stock hole is 120mm, and precipitation well hole diameter is 300mm, the external diameter of pumping steel pipe is 300 mm. The outer diameter of the pumping steel pipe is the same as the diameter of the precipitation well hole, the stability of the pumping steel pipe installed on the precipitation well hole is effectively guaranteed, only a clamp needs to be installed on the pumping steel pipe, the clamp is located at the upper end of the general duct piece at the top of the position, the pumping steel pipe can be effectively located, in the conventional design, the outer diameter of the pumping steel pipe is generally smaller than the diameter of the precipitation well hole, concrete slurry needs to be poured between the outer wall of the pumping steel pipe and the precipitation well hole to ensure that the pumping steel pipe does not shake in the precipitation well hole, the pumping steel pipe is not convenient to place in the precipitation well hole for many times, and the requirement for multiple times of precipitation is not.
Preferably, after the anchoring structure is assembled, concrete grout is poured into the dewatering well hole to form a pouring pile, and the connection stability of the general segments is further ensured.
Preferably, all be provided with the seal groove on the up end of general section of jurisdiction, lower terminal surface, left end face and the right-hand member face, elastic sealing pad sets up in the seal groove.
A construction method of a novel fabricated anchoring structure which is used as a dewatering well and a support at the same time comprises the following steps: the method comprises the following steps:
(1) prefabricating a universal duct piece in a factory and transporting the universal duct piece to a construction site;
(2) excavating a foundation pit according to a construction drawing, measuring and marking a foundation pit line to be excavated on a flat site in advance in order to ensure the construction quality, and finishing cleaning of slurry in the foundation pit to ensure the flatness of the foundation pit wall;
(3) placing the universal pipe pieces in the foundation pit by using a hoisting machine and vertically placing the universal pipe pieces close to the foundation pit wall, placing an elastic sealing gasket between the adjacent universal pipe pieces, butting the adjacent universal pipe pieces to form an anchor rod hole, fixedly connecting the adjacent universal pipe pieces in the left and right directions by using bolts, aligning the dewatering well holes of the adjacent universal pipe pieces in the up and down directions, and driving an anchor rod into the anchor rod hole in the front and back directions to enable the anchor rod to extend into the foundation pit wall;
(4) placing a water pumping steel pipe into a dewatering well hole and fixing the water pumping steel pipe, wherein the lower end of the water pumping steel pipe extends into a water layer, the upper part of the water pumping steel pipe is connected with a water collecting main pipe, and a water pumping pump connected with the water collecting main pipe is started to carry out well point dewatering;
(5) after the safe height of a foundation pit is excavated next time through well point precipitation, the pumping steel pipe is drawn out, the depth of the foundation pit is pre-excavated according to construction drawings, universal pipe pieces are sequentially installed downwards, an elastic sealing gasket is arranged between the adjacent universal pipe pieces, the adjacent universal pipe pieces are spliced to form an anchor rod hole, the adjacent universal pipe pieces in the left and right directions are fixedly connected through bolts, the adjacent dewatering well holes are aligned in the up and down directions, an anchor rod is driven into the anchor rod hole in the front and back directions to enable the anchor rod to go deep into the wall of the foundation pit, and the number of the universal pipe pieces installed downwards is reasonably selected according to the excavation depth of the foundation pit;
(6) reasonably arranging the times of well point dewatering according to the excavation depth of the foundation pit, and repeating the step (4) and the step (5) until an underground continuous wall of the foundation pit is formed;
(7) and finally, pouring concrete slurry into the dewatering well hole to form a pouring pile.
Preferably, in step (2), the trenching machine performs batch grab excavation on different groove sections according to a foundation pit line and field geological conditions measured on the ground, after the rotary drilling rig sequentially excavates two guide holes, the excavator excavates the groove section between the two holes to be communicated, excavation of the groove section is completed, after excavation of each groove section is completed, a constructor needs to perform cement paste plastering treatment, cement paste stirring is performed in a high-speed stirrer, feeding is performed strictly according to a construction mixing ratio, and cement-water glass double-liquid grouting parameters are as follows: the water glass modulus M = 2.8-3.1, the water glass solution concentration Be' = 35-40, the cement paste water cement ratio is 0.75: 1-1.0: 1, the volume ratio of cement paste to water glass is 1: 0.5-1: 1.0, after the groove section is excavated, carrying out cement paste surface plastering treatment and then mounting the universal duct piece.
Preferably, the lower extreme of the steel pipe that draws water is provided with the filter screen, the upper end of the steel pipe that draws water is connected with the collecting main through the rubber tube.
Preferably, the cross-section of general section of jurisdiction is right trapezoid structure, and the inclined plane concatenation of two adjacent general section of jurisdiction is general section of jurisdiction group about in the direction, and the concatenation seam parallel arrangement between two adjacent general section of jurisdiction groups on the upper and lower direction.
Compared with the prior art, the invention has the beneficial effects that:
(1) in the aspect of processing: the universal duct piece prefabricated in a factory omits engineering measures such as drilling, cleaning and sand backfilling of a dewatering well on site, greatly shortens the construction period, reduces the engineering cost, is suitable for geological conditions such as various weak strata, shallow buried strata and low underground water level, and has adjustability.
(2) In the aspect of dewatering well: the pumping steel pipe is arranged in the dewatering well hole reserved on the general duct piece in a penetrating mode to serve as a vacuum dewatering well, so that the air tightness of the dewatering well is good, a series of measures such as drilling, cleaning and backfilling are omitted, the construction period is shortened, and the cost is reduced.
(3) In the aspect of foundation pit support: after the anchoring structure is assembled, concrete slurry can be injected into the dewatering well hole reserved on the general duct piece, so that a cast-in-place pile is formed, and the connection stability of the general duct piece is further enhanced.
(4) Construction aspect: in the construction process, the universal duct piece can be lowered for a plurality of times, excavated for a plurality of times and downwards installed for a plurality of times, and the universal duct piece can be supported by the anchor rod in the excavation process.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a front view of the novel fabricated anchoring structure which is used as a dewatering well and a support;
fig. 2 is a top view of the novel fabricated anchoring structure which is used as a dewatering well and a support.
Fig. 3 is a side view of the novel fabricated anchoring structure which is used as a dewatering well and a support.
Fig. 4 is an overall effect diagram of the novel assembly type anchoring structure which is used as a dewatering well and a support.
Fig. 5 is a bolt rod diagram of the novel assembly type anchoring structure which is used as a dewatering well and a support.
In the figure: 1-general duct piece, 1.1-anchor rod groove, 1.2-dewatering well hole, 2-splicing seam, 3-pumping steel pipe, 4-filter screen, 5-rubber pipe, 6-bearing plate, 7-anchor rod, 8-elastic sealing gasket and 9-anchor rod hole.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments and drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.
Example 1
As shown in the figure, a novel fabricated anchoring structure used as a dewatering well and a support simultaneously comprises a plurality of prefabricated general pipe pieces 1 which are sequentially assembled, anchor rod grooves 1.1 are reserved in the front and rear directions of the general pipe pieces 1, anchor rod holes 9 can be formed after the adjacent general pipe pieces 1 are assembled, bolt holes are reserved in the left and right directions of the general pipe pieces 1, dewatering well holes 1.2 are reserved in the upper and lower directions of the general pipe pieces 1, anchor rods 7 are driven into the foundation pit walls from the anchor rod holes 9 to form anchor rod supports, the universal pipe pieces 1 which are adjacent in the left and right directions are connected through mounting bolts in the bolt holes, a pumping steel pipe 3 can penetrate through the dewatering well holes 1.2, the lower end of the pumping steel pipe 3 extends into a water layer, the upper end of the pumping steel pipe 3 is connected with a water collecting main pipe, the water collecting main pipe is connected with a pumping pump, an elastic sealing gasket 8 is arranged between the general pipe pieces 1 which are, an elastic sealing gasket 8 is arranged between the adjacent universal duct pieces 1 in the left and right directions, and the elastic sealing gasket 8 is an ethylene propylene diene monomer rubber gasket.
The cross section of the general duct piece 1 is of a right trapezoid structure, the inclined planes of two adjacent general duct pieces 1 in the left and right directions are spliced into a general duct piece group, and the splicing seams 2 between the two adjacent general duct piece groups in the up and down directions are arranged in parallel.
The lower extreme of the steel pipe 3 that draws water is provided with filter screen 4, the upper end of the steel pipe 3 that draws water is connected with the collecting main through rubber tube 5.
The height of general section of jurisdiction 1 is 3m, and it is 2m to go up the minor face, and the minor face is 3m down, and thickness is 1.2m, the diameter of anchor rod hole 9 is 120mm, and precipitation well hole 1.2 diameter is 300mm, the outer diameter of the steel pipe 3 that draws water is 300 mm.
And after the anchoring structure is assembled, pouring concrete grout into the dewatering well hole 1.2 to form the cast pile.
All be provided with the seal groove on the up end of general section of jurisdiction 1, lower terminal surface, left end face and the right-hand member face, elastic sealing pad 8 sets up in the seal groove.
Example 2
A construction method of a novel fabricated anchoring structure which is used as a dewatering well and a support at the same time comprises the following steps: the method comprises the following steps:
(1) prefabricating the universal duct piece 1 in a factory and transporting the universal duct piece to a construction site;
(2) excavating a foundation pit according to a construction drawing, measuring and marking a foundation pit line to be excavated on a flat site in advance in order to ensure the construction quality, and finishing cleaning of slurry in the foundation pit to ensure the flatness of the foundation pit wall;
(3) the method comprises the following steps that a hoisting machine is used for placing general segments 1 in a foundation pit and vertically placing the general segments close to the foundation pit wall, elastic sealing gaskets 8 are placed between the adjacent general segments 1, the adjacent general segments 1 are spliced to form anchor rod holes 9, the adjacent general segments 1 in the left and right directions are fixedly connected through bolts, precipitation well holes 1.2 of the adjacent general segments 1 are aligned in the up and down directions, and anchor rods 7 are driven into the anchor rod holes 9 in the front and back directions so that the anchor rods 7 extend into the foundation pit wall; in order to ensure the safety of a construction site and prevent the general duct piece 1 from collapsing, the hoisting machine needs to hoist until constructors firmly connect bolts, and the anchor rods 7 are driven into the foundation pit wall;
(4) placing a water pumping steel pipe 3 into a precipitation well hole 1.2 and fixing, wherein the lower end of the water pumping steel pipe 3 extends into a water layer, the upper part of the water pumping steel pipe 3 is connected with a water collecting main pipe, and a water pumping pump connected with the water collecting main pipe is started to perform well point precipitation;
(5) when the safety height of a next foundation pit excavation is reached through well point precipitation, the pumping steel pipe 3 is drawn out, the depth of the foundation pit is pre-excavated according to construction drawings, the universal pipe pieces 1 are sequentially installed downwards, the elastic sealing gasket 8 is arranged between the adjacent universal pipe pieces 1, the adjacent universal pipe pieces 1 are in butt joint to form the anchor rod hole 9, the adjacent universal pipe pieces 1 in the left and right directions are fixedly connected through bolts, the adjacent precipitation well holes 1.2 are aligned in the up and down directions, the anchor rod 7 is driven into the anchor rod hole 9 in the front and back directions to enable the anchor rod 7 to go deep into the foundation pit wall, and the number of the universal pipe pieces 1 installed downwards is reasonably selected according to the excavation depth of the foundation pit;
(6) reasonably arranging the times of well point dewatering according to the excavation depth of the foundation pit, and repeating the step (4) and the step (5) until an underground continuous wall of the foundation pit is formed;
(7) and finally, pouring concrete slurry into the precipitation well hole 1.2 to form the cast pile.
Example 3
The difference from example 2 is that: in the step (2), the trenching machine performs grab excavation in batches according to different groove sections according to foundation pit lines and field geological conditions measured on the ground, after the rotary drilling rig excavates two guide holes in sequence, the excavator excavates the groove section between the two holes to be communicated, excavation of the groove section is completed, after excavation of each groove section is completed, a constructor needs to perform cement paste surface plastering treatment, stirring of cement paste is performed in a high-speed stirrer, feeding is strictly performed according to a construction matching ratio, and cement-water glass double-liquid grouting parameters are as follows: the water glass modulus M = 2.8-3.1, the water glass solution concentration Be' = 35-40, the cement paste water cement ratio is 0.75: 1-1.0: 1, the volume ratio of cement paste to water glass is 1: 0.5-1: 1.0, after the groove section is excavated, carrying out cement paste surface coating treatment, and then mounting the universal duct piece 1. Preferably, the water glass modulus M =2.8, the water glass solution concentration Be' =35, the cement paste water cement ratio is 0.75: 1, the volume ratio of cement paste to water glass is 1: 0.5.
the lower extreme of the steel pipe 3 that draws water is provided with filter screen 4, the upper end of the steel pipe 3 that draws water is connected with the collecting main through rubber tube 5. The cross-section of general section of jurisdiction 1 is the right trapezoid structure, and the inclined plane concatenation of two adjacent general section of jurisdiction 1 is general section of jurisdiction group about in the direction, and the concatenation seam 2 parallel arrangement between two adjacent general section of jurisdiction group is gone up the below.
Compared with the prior art, the embodiment has the following advantages:
(1) in the aspect of processing: the universal segment 1 prefabricated in a factory omits engineering measures such as drilling, cleaning and sand backfilling of dewatering wells on site, greatly shortens the construction period, reduces the engineering cost, is suitable for geological conditions such as various weak strata, shallow buried strata and low underground water level, and has adjustability.
(2) In the aspect of dewatering well: the pumping steel pipe 3 is arranged in the precipitation well hole 1.2 reserved on the general pipe piece 1 in a penetrating way to be used as a vacuum precipitation well, so that the air tightness of the precipitation well is good, a series of measures such as drilling, cleaning and backfilling are omitted, the construction period is shortened, and the cost is reduced.
(3) In the aspect of foundation pit support: after the assembly of the anchoring structure is completed, concrete slurry can be injected into the precipitation well hole 1.2 reserved on the general segment 1, so that a cast-in-place pile is formed, and the connection stability of the general segment 1 is further enhanced.
(4) Construction aspect: in the construction process, can divide precipitation many times, divide excavation many times, divide and divide the general section of jurisdiction 1 of downward installation many times, at the in-process of excavation, accessible stock 7 supports the general section of jurisdiction 1 that the position is last.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features and inventive features disclosed herein.
Claims (10)
1. The utility model provides a novel double as precipitation well and assembled anchor structure of strutting, characterized by: the device comprises a plurality of prefabricated general pipe pieces which are sequentially assembled, wherein anchor rod grooves are reserved in the front and rear directions of the general pipe pieces, anchor rod holes can be formed after the adjacent general pipe pieces are assembled, bolt holes are reserved in the left and right directions of the general pipe pieces, precipitation well holes are reserved in the up and down directions of the general pipe pieces, anchor rods are driven into the foundation pit wall from the anchor rod holes to form anchor rod supports, and bolts are installed in the bolt holes to connect the adjacent general pipe pieces in the left and right directions; a water pumping steel pipe can penetrate through the dewatering well hole, the lower end of the water pumping steel pipe extends into the water layer, the upper end of the water pumping steel pipe is connected with a water collecting main pipe, and the water collecting main pipe is connected with a water pumping pump; elastic sealing gaskets are arranged between the adjacent universal pipe pieces in the up-down direction, and the elastic sealing gaskets are arranged between the adjacent universal pipe pieces in the left-right direction.
2. The novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 1, wherein the fabricated anchoring structure is characterized in that: the cross section of the general pipe piece is of a right trapezoid structure, the inclined planes of two adjacent general pipe pieces in the left and right directions are spliced to form a general pipe piece group, and the splicing seams of two adjacent general pipe piece groups in the up and down directions are arranged in parallel.
3. The novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 1, wherein the fabricated anchoring structure is characterized in that: the lower extreme of drawing water the steel pipe is provided with the filter screen, the upper end of drawing water the steel pipe is connected with the collecting main through the rubber tube.
4. The novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 2, wherein the fabricated anchoring structure is characterized in that: the height of general section of jurisdiction is 3m, and it is 2m to go up the minor face, and the minor face is 3m down, and thickness is 1.2m, the diameter of anchor rod hole is 120mm, and precipitation well hole diameter is 300mm, the external diameter of pumping steel pipe is 300 mm.
5. The novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 1, wherein the fabricated anchoring structure is characterized in that: and after the anchoring structure is assembled, pouring concrete slurry into the dewatering well hole to form a pouring pile.
6. The novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 2, wherein the fabricated anchoring structure is characterized in that: all be provided with the seal groove on up end, lower terminal surface, the left end face and the right-hand member face of general section of jurisdiction, elastic sealing pad sets up in the seal groove.
7. A construction method of a novel fabricated anchoring structure which is used as a dewatering well and a support at the same time comprises the following steps: the method is characterized in that: the method comprises the following steps:
(1) prefabricating a universal duct piece in a factory and transporting the universal duct piece to a construction site;
(2) excavating a foundation pit according to a construction drawing, measuring and marking a foundation pit line to be excavated on a flat site in advance in order to ensure the construction quality, and finishing cleaning of slurry in the foundation pit to ensure the flatness of the foundation pit wall;
(3) placing the universal pipe pieces in the foundation pit by using a hoisting machine and vertically placing the universal pipe pieces close to the foundation pit wall, placing an elastic sealing gasket between the adjacent universal pipe pieces, butting the adjacent universal pipe pieces to form an anchor rod hole, fixedly connecting the adjacent universal pipe pieces in the left and right directions by using bolts, aligning the dewatering well holes of the adjacent universal pipe pieces in the up and down directions, and driving an anchor rod into the anchor rod hole in the front and back directions to enable the anchor rod to extend into the foundation pit wall;
(4) placing a water pumping steel pipe into a dewatering well hole and fixing the water pumping steel pipe, wherein the lower end of the water pumping steel pipe extends into a water layer, the upper part of the water pumping steel pipe is connected with a water collecting main pipe, and a water pumping pump connected with the water collecting main pipe is started to carry out well point dewatering;
(5) after the safe height of a foundation pit is excavated next time through well point precipitation, the pumping steel pipe is drawn out, the depth of the foundation pit is pre-excavated according to construction drawings, universal pipe pieces are sequentially installed downwards, an elastic sealing gasket is arranged between the adjacent universal pipe pieces, the adjacent universal pipe pieces are spliced to form an anchor rod hole, the adjacent universal pipe pieces in the left and right directions are fixedly connected through bolts, the adjacent dewatering well holes are aligned in the up and down directions, an anchor rod is driven into the anchor rod hole in the front and back directions to enable the anchor rod to go deep into the wall of the foundation pit, and the number of the universal pipe pieces installed downwards is reasonably selected according to the excavation depth of the foundation pit;
(6) reasonably arranging the times of well point dewatering according to the excavation depth of the foundation pit, and repeating the step (4) and the step (5) until an underground continuous wall of the foundation pit is formed;
(7) and finally, pouring concrete slurry into the dewatering well hole to form a pouring pile.
8. The construction method of the novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 7, is characterized in that: in the step (2), the trenching machine performs grab excavation in batches according to different groove sections according to foundation pit lines and field geological conditions measured on the ground, after the rotary drilling rig excavates two guide holes in sequence, the excavator excavates the groove section between the two holes to be communicated, excavation of the groove section is completed, after excavation of each groove section is completed, a constructor needs to perform cement paste surface plastering treatment, stirring of cement paste is performed in a high-speed stirrer, feeding is strictly performed according to a construction matching ratio, and cement-water glass double-liquid grouting parameters are as follows: the water glass modulus M = 2.8-3.1, the water glass solution concentration Be' = 35-40, the cement paste water cement ratio is 0.75: 1-1.0: 1, the volume ratio of cement paste to water glass is 1: 0.5-1: 1.0, after the groove section is excavated, carrying out cement paste surface plastering treatment and then mounting the universal duct piece.
9. The construction method of the novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 7, is characterized in that: the lower extreme of drawing water the steel pipe is provided with the filter screen, the upper end of drawing water the steel pipe is connected with the collecting main through the rubber tube.
10. The construction method of the novel fabricated anchoring structure used as a dewatering well and a support as claimed in claim 7, is characterized in that: the cross-section of general section of jurisdiction is right trapezoid structure, and the inclined plane concatenation of two adjacent general section of jurisdiction is general section of jurisdiction group about in the direction, and the concatenation seam parallel arrangement between two sets of general section of jurisdiction groups of adjacent in the up-down direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010260894.3A CN111350202A (en) | 2020-04-03 | 2020-04-03 | Novel assembly type anchoring structure capable of being used as dewatering well and support and construction method |
| PCT/CN2020/130264 WO2021196657A1 (en) | 2020-04-03 | 2020-11-20 | Novel fabricated anchorage structure serving as both dewatering well and support, and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010260894.3A CN111350202A (en) | 2020-04-03 | 2020-04-03 | Novel assembly type anchoring structure capable of being used as dewatering well and support and construction method |
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| CN111350202A true CN111350202A (en) | 2020-06-30 |
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| CN202010260894.3A Pending CN111350202A (en) | 2020-04-03 | 2020-04-03 | Novel assembly type anchoring structure capable of being used as dewatering well and support and construction method |
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| CN (1) | CN111350202A (en) |
| WO (1) | WO2021196657A1 (en) |
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| WO2021196657A1 (en) * | 2020-04-03 | 2021-10-07 | 山东大学 | Novel fabricated anchorage structure serving as both dewatering well and support, and construction method |
| CN114606951A (en) * | 2022-03-03 | 2022-06-10 | 北京大圣智造科技有限公司 | Intelligent assembly type inverted hanging structure in foundation pit and construction method thereof |
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| WO2021196657A1 (en) | 2021-10-07 |
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