CN111424670A - Occlusive pile pouring and pile body quality detection device and method for waterproof curtain - Google Patents
Occlusive pile pouring and pile body quality detection device and method for waterproof curtain Download PDFInfo
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- CN111424670A CN111424670A CN202010348740.XA CN202010348740A CN111424670A CN 111424670 A CN111424670 A CN 111424670A CN 202010348740 A CN202010348740 A CN 202010348740A CN 111424670 A CN111424670 A CN 111424670A
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- secant
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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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
- E02D19/185—Joints between sheets constituting the sealing aprons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
Abstract
A device and a method for detecting the quality of cast-in-place piles and pile bodies of waterproof curtains are disclosed, the device at least comprises a cast-in-place pipeline, a check valve, a counterweight ring, a cast-in-place pipe end, a distributed fiber grating and a cast-in-place pipe joint, the distributed fiber grating is embedded in the cast-in-place pipeline and used for testing the integrity of the pile bodies of the cast-in-place piles and monitoring the stress strain of the waterproof curtains in the operation period, the lower end of the cast-in-place pipe is connected with the cast-in-place pipe end, the check valve is arranged between the cast-in-place pipe end and the cast-in-place pipeline, the cast-in-place pipe end is provided with the counterweight ring, the upper end of the cast-in; therefore, the method can effectively solve the problems of low construction speed, high construction cost, difficult connection of the filling guide pipes, inconvenient operation, high mechanical requirement, large construction site and inconvenient detection and monitoring of the pile body of the adjacent impermeable membrane secant pile.
Description
Technical Field
The invention relates to the technical field of underground blocking, seepage prevention and pollution control of mine curtains, water interception curtains of hydraulic engineering, pollutant blocking and isolation, foundation pit water-stopping curtains and the like, in particular to a device and a method for cast-in-place pile and pile body quality detection of water-stopping curtains.
Background
The secant pile is formed by embedding part of circumferences of adjacent concrete row piles, and a reinforcement cage is arranged in the piles constructed in the following sequence, so that an integral continuous waterproof and soil retaining maintenance structure with good seepage-proofing effect is formed. The arrangement mode of the secant piles is that one secant pile is not provided with ribs and an ultra-retarding plain concrete pile and a reinforced concrete pile are arranged at intervals. During construction, a plain concrete pile is constructed firstly, then a reinforced concrete pile is constructed, the construction of the reinforced concrete pile is completed before the plain concrete pile is initially set, and the concrete of the intersection part of the adjacent plain concrete piles is cut off to realize occlusion. And when the occlusive pile is poured, pouring super-retarding concrete by adopting a concrete pouring guide pipe with the diameter not less than 250 mm.
As a mature process, the occlusive pile construction process needs ultra-retarding concrete and a full-casing drilling machine, so that the construction cost is particularly high, the cost is almost 2 times of that of the underground diaphragm wall with the same thickness, and the hole forming speed is slow and is 2 times of the hole forming time of a common cast-in-situ bored pile. The construction process of the secant pile in the deep sandy gravel stratum is different from that of other stratums, and the following problems exist in the prior art when a water-blocking curtain is constructed in the deep sandy gravel stratum construction: 1. the full-sleeve secant pile is low in hole forming speed and high in construction cost, 2, the technical requirement on ultra-retarded concrete is high, the material cost is high, 3, the concrete pouring guide pipe is heavy, difficult to connect, long in dismounting time and large in labor amount, 4, the concrete pouring guide pipe needs to be dismounted in a mechanical matching mode, the occupied area of a site is large, the pouring process is complex, the construction of a narrow site is difficult, 5, the secant pile body integrity detection method mainly comprises a drilling coring method, a buried pipe type sound wave transmission method and a high-low strain dynamic detection method, and the pile body integrity and the later-stage stress strain are inconvenient to monitor.
Therefore, in view of the above-mentioned drawbacks, the present inventor has studied and designed a device and a method for grouting a secant pile and detecting the quality of a pile body for a waterproof curtain by taking into account the experience and results of the related industries for many years through careful research and design.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the quality of cast-in-place piles and pile bodies of waterproof curtains, which can effectively solve the problems of low construction speed, high construction cost, difficult connection of cast-in-place guide pipes, inconvenient operation, high mechanical requirement, large construction site and inconvenient detection and monitoring of the pile bodies of adjacent impermeable membrane cast-in-place piles.
To achieve the above object, the present invention discloses
According to the above content, the apparatus and method for filling the occlusive pile and detecting the quality of the pile body for the waterproof curtain of the invention have the following effects:
1. the device for filling the occlusive pile and detecting the quality of the pile body of the waterproof curtain has the advantages of simple structure, light weight, simple and convenient operation, small labor capacity, practicability, reliability and stable performance.
2. The device and the method for filling the occlusive pile and detecting the quality of the pile body of the occlusive pile for the water-blocking curtain have the advantages that the dismounting time is short in the filling process of the occlusive pile, the mechanical cooperation is not needed, the operation can be carried out in a narrow space, slurry enters the hole of the occlusive pile through a filling pipeline and a check valve, the influence of the slurry and underground water in the hole is avoided, and the influence of the slurry and water in the hole on the performance of a filling material is reduced.
3. The device and the method for filling the secant pile and detecting the pile body quality of the secant pile for the water-blocking curtain can detect the pile body integrity of the secant pile after work, evaluate the construction quality of the secant pile, accurately detect the defect position and provide a basis for remedying the water-blocking curtain.
4. The device and the method for filling the occlusive piles and detecting the quality of the pile body of the occlusive pile for the waterproof curtain can monitor the stress-strain condition of the occlusive pile body in the operation period of the occlusive pile waterproof curtain, analyze the operation condition, the service life and the safety performance of the waterproof curtain through the real-time monitoring data of each occlusive pile, and quickly and conveniently monitor the integrity of the pile body and the later stress-strain.
The details of the present invention can be obtained from the following description and the attached drawings.
Drawings
FIG. 1 shows a schematic plan view of a bite-block water curtain of the present invention.
Fig. 2 shows a schematic diagram of a secant pile pouring and pile body quality detecting device for a water-blocking curtain of the invention.
Fig. 3 shows an operation diagram of the method for grouting a secant pile and detecting the quality of a pile body for a water-blocking curtain according to the present invention.
Reference numerals:
1. the method comprises the following steps of (1) a waterproof curtain, 2) an occlusive pile, 3, an occlusive section of the occlusive pile, 4) a pouring pipeline, 5, a check valve, 6, a counterweight ring, 7, a grouting pipe end, 8, a distributed fiber grating, 9, a grouting pipe joint, 10, a grouting pipeline, 11, a pipeline joint, 12 and grout.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals.
Referring to fig. 2, the secant pile pouring and pile body quality detection device for the waterproof curtain at least comprises a pouring pipeline 4, a check valve 5, a counterweight ring 6, a grouting pipe end 7, a distributed fiber grating 8 and a grouting pipe joint 9, wherein the distributed fiber grating 8 is embedded in the pouring pipeline 4 and used for testing the pile body integrity of the secant pile 2 and monitoring the stress strain of the waterproof curtain 1 in the operation period, the lower end of the pouring pipe 4 is connected with the grouting pipe end 7, the check valve 5 is arranged between the grouting pipe end 7 and the pouring pipeline 4, the grouting pipe end 7 is provided with the counterweight ring 6, the upper end of the pouring pipeline 4 is provided with a grouting pipe quick joint 9, and the grouting pipe quick joint 9 can be quickly connected with a pipeline joint 11 of a grouting pipeline 10.
The filling pipeline 4 is a light hose made of nylon, plastic or other materials, has light weight, high toughness, firmness and durability, can be 89mm, 108mm, 133mm, 250mm, 330mm and other dimensions, has the length determined according to the design depth of the snap pile, and is customized and processed by a factory.
The distributed fiber grating 8 is embedded in one side of the filling pipeline 4, the distributed fiber utilizes the fiber 8 as a sensing sensitive element and a sensing system for transmitting a signal medium, the OTDE technology is adopted to detect the temperature and strain changes at different positions along the fiber, the pile body integrity of the occlusive pile 2 can be detected, the construction quality of the occlusive pile 2 is evaluated, the stress and strain of a pile body is monitored in the operation period of the occlusive pile water-blocking curtain 1, and the operation condition, the service life and the safety performance of the water-blocking curtain are analyzed.
The end 7 of the grouting pipe is positioned at the lower end of the filling pipeline 4, and the bottom of the grouting pipe is provided with a 45-degree inclined opening, so that grout can flow out of the grouting pipe and can fill the occlusive pile 2 conveniently; and a counterweight ring 6 is arranged on one side of the long end of the grouting pipe end 7 and used for binding concrete blocks, sand bags and other counterweights, and the filling pipeline 4 and the grouting pipe end 7 are sunk into the bottom of the hole of the occlusive pile 2.
The check valve 5 is located inside the grouting pipe end 7, the grout 12 of the grouting pipeline 4 can jack the check valve 5 under the action of the grouting pressure, the grout 12 enters the bottom of the hole of the occlusive pile 2 through the grouting pipeline 4, the check valve 5 and the grouting pipe end 7, and the grout in the hole of the occlusive pile 2 cannot enter the grouting pipeline 4 through the check valve, so that a traditional conduit inner water-insulation rubber ball bladder is replaced, and the water-cement ratio of the grouting grout is not influenced by the grout and water in the hole of the occlusive pile.
The invention also comprises a method for pouring the secant pile and detecting the quality of the pile body of the waterproof curtain, which can be carried out by the device for pouring the secant pile and detecting the quality of the pile body of the waterproof curtain, and the method comprises the following steps:
the method comprises the following steps: determining the plane position, the vertical depth, the top and bottom position, the secant pile diameter and the secant section length of the waterproof curtain 1 according to the hydrogeology and engineering geological conditions of the waterproof curtain construction site, and measuring and setting out the position of a secant pile hole.
Step two: as shown in fig. 1, a rotary drilling rig is adopted to construct a sequential hole of an occlusive pile 2 at the position of a water-blocking curtain 1, the pile diameter of the occlusive pile can be 600mm, 800mm or 1000mm, the depth reaches the designed depth, and the bottom is generally positioned in a water-resisting layer.
Step three: as shown in fig. 2 and 3, the counterweight ring 6 is bound, the check valve 5 is in a closed state, and the filling pipeline 4, the check valve 5 and the counterweight ring 6 are sunk into the bottom of the hole of the occlusive pile 2 under the action of the counterweight. The pouring pipeline 4 is adopted to replace the traditional steel guide pipe, a 40m deep hole is taken as an example, the traditional steel guide pipe needs 1 hour for 3 persons to operate and lower under the cooperation of a crane; and the process of putting down the filling pipeline 4 does not need the cooperation of a crane, 1 person operates, the putting down time is only 5min, and about 55min is saved.
Step four: as shown in fig. 3, the upper part of the filling pipeline 4 is connected with the pipe of the slurry conveying pipeline 10 through the grouting pipe joint 9The road joint 11 is connected, the slurry 12 enters the filling pipeline 4 through the slurry conveying pipeline 10, the check valve 5 is further jacked open under the action of pressure, the slurry 12 enters the bottom of the first-order hole of the occlusive pile 2, the slurry 12 returns from the bottom of the first-order hole, and the slurry in the occlusive pile 2 is replaced out of the hole opening. Wherein the slurry 12 can be a high-content fly ash-based slurry, the water-solid ratio is 0.7:1.0, and the cement: the fly ash is 4:6, bentonite and other additives are added, the cement is P.O 42.5 ordinary portland cement, the fly ash is dry ash of II grade and above of a power plant, the initial setting time of slurry is 14h, the final setting time is 17h, the fluidity is 26cm, the 3d strength is only 0.7MPa, the occlusive pile occlusion construction is facilitated, the 7d strength is 1.5MPa, the 250d strength is 13.2MPa, the early strength is low, the occlusive pile occlusion section construction is facilitated, the later strength is higher, the permeability coefficient reaches 10-9m/s, good anti-permeability performance, low cost of the high-doped fly ash-based slurry 12 and high cost performance.
Step five: and (3) as shown in the figures 1 and 3, repeating the second step and the fourth step, constructing a second-order hole of the occlusive pile 2 at the position of the waterproof curtain 1 by adopting a rotary drilling rig, putting a pouring pipeline 4 into the hole, pouring a high-content fly ash-based slurry 12, enabling the slurry 12 to enter the pouring pipeline 4 through a slurry conveying pipeline 10, further jacking a check valve 5 under the action of pressure, and enabling the slurry 12 to enter the bottom of the second-order hole of the occlusive pile 2 to complete the construction of the second-order hole of the occlusive pile 2. The cast-in-place pipeline 4 is left in the occlusive pile 2, does not need to be pulled out again, and can detect the integrity of the pile body and monitor the stress and strain condition of the pile body during operation. And the traditional steel conduit needs to be pulled out again after the pouring is finished, and taking the hole depth of 40m as an example, the steel conduit needs to be pulled out for more than 1 hour by 3 persons under the cooperation of a lifting machine. The working time is saved by more than 1 hour in the tube drawing process.
Step six: as shown in fig. 2 and 3, after the first-order pile slurry and the second-order pile slurry 12 of the occlusive pile 2 are finally set, the integrity of the pile body of the occlusive pile 2 is detected through the distributed fiber grating 8 embedded on one side of the filling pipeline 4, the construction quality of the water-blocking curtain 1 is evaluated, and the defect position of the water-blocking curtain 1 is accurately detected. The distributed fiber bragg grating 8 can monitor the stress-strain condition of the occlusive pile waterproof curtain 1 in the operation period, analyze the operation condition, the service life and the safety performance of the waterproof curtain and provide prediction in time.
Therefore, the invention has the advantages that:
1. the device for filling the occlusive pile and detecting the quality of the pile body of the waterproof curtain has the advantages of simple structure, light weight, simple and convenient operation, small labor capacity, practicability, reliability and stable performance.
2. The device and the method for filling the occlusive pile and detecting the quality of the pile body of the occlusive pile for the water-blocking curtain have the advantages that the dismounting time is short in the filling process of the occlusive pile, the mechanical cooperation is not needed, the operation can be carried out in a narrow space, slurry enters the hole of the occlusive pile through a filling pipeline and a check valve, the influence of the slurry and underground water in the hole is avoided, and the influence of the slurry and water in the hole on the performance of a filling material is reduced.
3. The device and the method for filling the secant pile and detecting the pile body quality of the secant pile for the water-blocking curtain can detect the pile body integrity of the secant pile after work, evaluate the construction quality of the secant pile, accurately detect the defect position and provide a basis for remedying the water-blocking curtain.
4. The device and the method for filling the occlusive piles and detecting the quality of the pile body of the occlusive pile for the waterproof curtain can monitor the stress-strain condition of the occlusive pile body in the operation period of the occlusive pile waterproof curtain, analyze the operation condition, the service life and the safety performance of the waterproof curtain through the real-time monitoring data of each occlusive pile, and quickly and conveniently monitor the integrity of the pile body and the later stress-strain.
It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.
Claims (7)
1. The utility model provides a secant pile fills and pile shaft quality testing device for waterproof curtain, includes filling line, check valve, counter weight ring, slip casting pipe end, distributed fiber grating and slip casting coupling at least, its characterized in that:
embedding distributing type fiber grating in the filling pipe for the stress strain of test secant pile's pile shaft integrality and the monitoring operation period curtain that blocks water, grouting pipe end is connected to the lower extreme of filling pipe, set up the check valve between grouting pipe end and the filling pipe, grouting pipe end is provided with the counter weight ring, and the upper end of filling pipe sets up grouting pipe quick-operation joint, grouting pipe quick-operation joint and the pipeline joint quick-operation connection of defeated thick liquid pipeline.
2. The apparatus for filling a bite pile and detecting quality of a pile body for a water-blocking curtain of claim 1, wherein: the perfusion pipeline is a light hose made of nylon or plastics, and the diameter of the perfusion pipeline is 89mm, 108mm, 133mm, 250mm or 330 mm.
3. The apparatus for filling a bite pile and detecting quality of a pile body for a water-blocking curtain of claim 1, wherein: the bottom of the end head of the grouting pipe is provided with a 45-degree bevel opening, and one side of the long end of the end head of the grouting pipe is provided with a counterweight ring.
4. The apparatus for filling a bite pile and detecting quality of a pile body for a water-blocking curtain of claim 1, wherein: the check valve is positioned inside the end head of the grouting pipe.
5. A method for pouring a secant pile and detecting the quality of a pile body for a water blocking curtain by the apparatus for pouring a secant pile and detecting the quality of a pile body for a water blocking curtain according to any one of claims 1 to 4, comprising the steps of:
the method comprises the following steps: determining the plane position, vertical depth, top and bottom positions, the diameter of the secant pile and the length of the secant section of the waterproof curtain, and measuring and setting out the position of a pile hole of the secant pile;
step two: constructing a secant pile first-order hole at the position of the waterproof curtain by adopting a rotary drilling rig, wherein the pile diameter of the secant pile is 600mm, 800mm or 1000 mm;
step three: binding a counterweight ring, wherein the check valve 5 is in a closed state, and the filling pipeline, the check valve and the counterweight ring sink into the bottom of the hole of the occlusive pile under the action of the counterweight;
step four: the slurry enters a filling pipeline through a slurry conveying pipeline, and then the check valve is jacked open under the action of pressure, the slurry enters the first-order hole bottom of the occlusive pile, returns from the hole bottom, and replaces the slurry in the occlusive pile out of an orifice;
step five: repeating the second step and the fourth step, constructing a second-order hole of the secant pile at the position of the waterproof curtain, putting a filling pipeline, filling slurry, enabling the slurry to enter the filling pipeline through a slurry conveying pipeline, further jacking a check valve under the action of pressure, enabling the slurry to enter the bottom of the second-order hole of the secant pile, and completing construction of the second-order hole of the secant pile;
step six: and after the slurry in the first-order pile and the second-order pile of the occlusive pile is finally solidified, detecting the integrity of the pile body of the occlusive pile through the distributed fiber bragg grating embedded on one side of the filling pipeline, evaluating the construction quality of the water-blocking curtain, and detecting the defect position of the water-blocking curtain.
6. The method for pouring a spud and detecting the quality of a pile body of a water-blocking curtain as claimed in claim 5, wherein: the slurry is high-doped fly ash-based slurry, the water-solid ratio is 0.7:1.0, and the cement: the fly ash is 4: 6.
7. The method for pouring a spud and detecting the quality of a pile body of a water-blocking curtain as claimed in claim 6, wherein: the cement is P.O 42.5 ordinary portland cement, the fly ash is II-grade or above dry ash of a power plant, the initial setting time of the slurry is 14h, the final setting time is 17h, the fluidity is 26cm, the 3d strength is 0.7MPa, the 7d strength is 1.5MPa, and the 250d strength is 13.2 MPa.
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| CN202010348740.XA CN111424670B (en) | 2020-04-28 | 2020-04-28 | Occlusive pile pouring and pile body quality detection device and method for waterproof curtain |
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| CN202010348740.XA CN111424670B (en) | 2020-04-28 | 2020-04-28 | Occlusive pile pouring and pile body quality detection device and method for waterproof curtain |
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| CN111424670B CN111424670B (en) | 2021-08-06 |
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| CN113006871A (en) * | 2021-02-03 | 2021-06-22 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
| CN113006871B (en) * | 2021-02-03 | 2024-01-30 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
| CN113047810A (en) * | 2021-04-30 | 2021-06-29 | 成都和拓土木工程有限公司 | Multifunctional grouting nozzle |
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| CN111424670B (en) | 2021-08-06 |
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