CN111458086B - Method for rapidly detecting waterproof quality of assembled box culvert seam - Google Patents
Method for rapidly detecting waterproof quality of assembled box culvert seam Download PDFInfo
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- CN111458086B CN111458086B CN202010250375.9A CN202010250375A CN111458086B CN 111458086 B CN111458086 B CN 111458086B CN 202010250375 A CN202010250375 A CN 202010250375A CN 111458086 B CN111458086 B CN 111458086B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3281—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell
- G01M3/329—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell for verifying the internal pressure of closed containers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of assembly type box culvert engineering and assembly type underground pipe gallery engineering, in particular to a method for quickly detecting the waterproof quality of joints of assembly type box culverts, which comprises the following steps: a. pre-burying a pipe opening: before the assembled box culvert is installed in a butt joint mode, a water inlet is pre-buried in the side wall of the tenon on the inner side of the assembled box culvert, and a water outlet is pre-buried in the top of the tenon on the inner side of the assembled box culvert; b. mounting the assembled box culvert; c. a test preparation stage: checking a manual pressure pump; checking whether the water inlet and the water outlet are smooth or not; d. a water injection stage: connecting a water injection pipe on a manual pressure pump with a water inlet, continuously injecting water into the seam gap of the assembled box culvert through the water inlet by using the manual pressure pump, and soaking for not less than 24 hours; e. calculating the experiment pressure; f. and (3) a testing stage: when the actually measured water seepage amount is smaller than the allowable water seepage amount, the test is qualified; the technology has the advantages of simple principle, low cost, high efficiency, rapidness, accuracy, reliability and the like.
Description
Technical Field
The invention relates to the technical field of assembly type box culvert engineering and assembly type underground pipe gallery engineering, in particular to a method for rapidly detecting the waterproof quality of joints of assembly type box culverts.
Background
Brief introduction: the assembly type box culvert, also called a split mounting type box culvert, is a reinforced concrete prefabricated box structure, is a rapid construction process of the box culvert, has the characteristics of factory prefabrication and processing and field assembly, and is mainly used for engineering projects requiring short construction period. The general box culvert construction adopts on-site binding of reinforcing steel bars, formwork support and concrete pouring, has long construction period and short construction period requirement, adopts the assembly type box culvert, can greatly shorten the construction period, is used for the assembly type box culvert for drainage, rubber water stop belts are pre-embedded at two ends of the box culvert, the water stop belts are squeezed after the two sections of box culverts are butted, then the two sections of box culverts are fixed in a certain mode, so that water leakage between sections can be prevented, the quality of the seam of the assembly type box culvert is the key point of construction quality control and is a difficult point, particularly, the waterproof construction of the seam of the assembly type box culvert generates water leakage when the connection is not good, the integral quality of the assembly type box culvert is influenced, the detection of the waterproof quality of the traditional assembly type box culvert seam is usually a closed water test, about 15 directions of water injection are carried out in the whole assembly type box culvert, time and labor are wasted, water resources are very wasted, energy conservation and environmental protection are not beneficial, and the method can hardly be implemented for the assembly type box culvert with large section like highway engineering, even if the method is implemented, the cost is huge, and the detection result has larger error.
Disclosure of Invention
In order to solve the problems, the invention provides a method for rapidly detecting the waterproof quality of a seam of an assembled box culvert.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for rapidly detecting the waterproof quality of a seam of an assembled box culvert comprises the following steps: a. pre-burying a pipe opening: before the assembled box culvert is installed in a butt joint mode, a water inlet is pre-buried in the side wall of the tenon on the inner side of the assembled box culvert, and a water outlet is pre-buried in the top of the tenon on the inner side of the assembled box culvert;
b. and (3) mounting the assembled box culvert: carrying out the butt joint installation work of the conventional assembled box culvert;
c. a test preparation stage: checking a manual pressurizing pump: checking whether a pressure gauge on the manual pressure pump is normal, discharging air in the manual pressure pump and a water injection pipe, sealing the end of the water injection pipe by using a plug, then testing the pressure, stabilizing the pressure for 8-12 minutes when the pressure is increased to 1MPa, and checking whether the sealing condition and the manual pressure pump are damaged when the pressure is reduced on the premise that the pressure is not reduced;
checking whether the water inlet and the water outlet are smooth: if the water inlet or the water outlet is blocked and needs to be cleaned, simultaneously checking whether the end of the water pipe is damaged or not, if the end of the water pipe is damaged, cutting off the damaged part, and keeping enough exposed length to ensure that the water pipe is connected with the water injection pipe;
d. a water injection stage: connecting a water injection pipe on a manual pressure pump with a water inlet, continuously injecting water into the seam gap of the assembled box culvert through the water inlet by using the manual pressure pump, observing a water outlet at the top, indicating that air in the seam gap is completely removed when water flows out linearly from the water outlet, stopping injecting water, sealing the water inlet and the water outlet by using a plug, and soaking for not less than 24 hours;
e. calculating the experimental pressure: calculating test pressure according to the no-pressure condition, taking the net height h1 in the box culvert, calculating a water head h2, wherein h2 is 0.5-1.5 m, h = h1+ h2, and the calculation formula of the test pressure is as follows: p = ρ gh; wherein: p is the pressure; ρ is the liquid density; the density of the water is 1 multiplied by 10^3kg/m ^ 3; g is the gravity acceleration of 9.8N/kg; h = h1+ h 2;
f. and (3) a testing stage: after the seam clearance of the assembled box culvert is filled with water and soaked for 24 hours, keeping the plug on the water outlet sealed, opening the plug of the water inlet, connecting the water inlet with a water filling pipe on a manual pressure pump, checking the sealing condition of pipeline connection, measuring 3-5 liters of water by using a measuring cup, pouring the water into a water tank of the manual pressure pump, supplementing water and pressurizing the seam clearance of the assembled box culvert by using the manual pressure pump, starting timing when the test pressure reaches the specified pressure, observing the water seepage condition of the seam, supplementing water into the seam clearance of the assembled box culvert under the condition of keeping the test pressure p constant, wherein the observation time is more than or equal to 30min, and making data records, including the water supplement amount W, the actually measured water seepage observation time T and the length L of a test culvert section;
g. data processing and result analysis: calculating the actually measured water seepage amount, wherein the actually measured water seepage amount calculation formula is as follows:
q=W/(T×L）；
wherein: q is actually measured water seepage amount, L/(min m);
w is water supplement amount, L;
t-actually measured seepage observation time, min;
l is the length of the test culvert section, m;
and when the actually measured water seepage amount is smaller than the allowable water seepage amount, the test is qualified.
As optimization, the water inlet penetrates through the side wall of the tenon, and the water outlet penetrates through the top of the tenon.
As optimization, the water inlet or the water outlet is made of a PPR fiber composite water pipe with the length of 15-25 cm.
Preferably, the water inlet or the water outlet is arranged in the middle of the width direction of the tenon of the box culvert, the water inlet is arranged at the position, 50 cm-60 cm away from the bottom plate, of the side wall of the box culvert, the water outlet is arranged at the middle of the top of the tenon, and the length of the water inlet or the water outlet, which is exposed out of the interior of the assembled box culvert, is 3 cm-5 cm.
The whole beneficial effect of this scheme is: the technology has the advantages of simple principle, low cost, high efficiency, rapidness, accuracy, reliability and the like, does not need to be provided with two-end blocking plates, a high-power water pump, blocking materials and other auxiliary products, and has low cost; the 'inter-seam water pressing test' only injects water at the seam of the assembled box culvert, the water injection amount is only 3-5 liters, compared with the traditional water closing test which injects water at 15 parts in the whole assembled box culvert, the water consumption is only three ten-thousandth of that of the traditional method, the whole cost is only 0.5 percent of that of the traditional method, and the economic benefit is obvious; meanwhile, the technology is fast, simple and convenient to operate and high in efficiency, only one portable manual pressure pump is needed, a large amount of water injection is not needed, and the time can be saved by 8-10 hours; the technology is suitable for highway engineering assembled box culvert engineering, assembled underground conveying and discharging pipelines, assembled underground pipe gallery engineering and the like. The method can be widely applied to construction self-inspection, supervision and sampling inspection and completion inspection of the projects.
Drawings
FIG. 1 is a schematic cross-sectional view of the assembled box culvert of the present invention after butt-joint installation.
FIG. 2 is a schematic diagram of the positions of the water inlet and the water outlet of the assembled box culvert.
Figure 3 is a schematic rear side view of the fabricated box culvert of the present invention.
FIG. 4 is a graph of the allowable water seepage of the pressureless pipe in the water shut-off test according to the present invention.
Wherein 1, water inlet, 2, delivery port, 3, tenon, 4, assembled box culvert seam clearance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Example 1
A method for rapidly detecting the waterproof quality of a seam of an assembled box culvert comprises the following steps: a. pre-burying a pipe opening: before the assembled box culvert is installed in a butt joint mode, a water inlet is pre-buried in the side wall of the tenon on the inner side of the assembled box culvert, and a water outlet is pre-buried in the top of the tenon on the inner side of the assembled box culvert;
b. and (3) mounting the assembled box culvert: carrying out the butt joint installation work of the conventional assembled box culvert;
c. a test preparation stage: checking a manual pressurizing pump: checking whether a pressure gauge on the manual pressure pump is normal, discharging air in the manual pressure pump and a water injection pipe, sealing the end of the water injection pipe by using a plug, then testing the pressure, stabilizing the pressure for 8-12 minutes when the pressure is increased to 1MPa, and checking whether the sealing condition and the manual pressure pump are damaged when the pressure is reduced on the premise that the pressure is not reduced;
checking whether the water inlet and the water outlet are smooth: if the water inlet or the water outlet is blocked and needs to be cleaned, simultaneously checking whether the end of the water pipe is damaged or not, if the end of the water pipe is damaged, cutting off the damaged part, and keeping enough exposed length to ensure that the water pipe is connected with the water injection pipe;
d. a water injection stage: connecting a water injection pipe on a manual pressure pump with a water inlet, continuously injecting water into the seam gap of the assembled box culvert through the water inlet by using the manual pressure pump, observing a water outlet at the top, indicating that air in the seam gap is completely removed when water flows out linearly from the water outlet, stopping injecting water, sealing the water inlet and the water outlet by using a plug, and soaking for not less than 24 hours;
e. calculating the experimental pressure: calculating test pressure according to the no-pressure condition, taking the net height h1 in the box culvert, calculating a water head h2, wherein h2 is 0.5-1.5 m, h = h1+ h2, and the calculation formula of the test pressure is as follows: p = ρ gh; wherein: p is the pressure; ρ is the liquid density; the density of the water is 1 multiplied by 10^3kg/m ^ 3; g is the gravity acceleration of 9.8N/kg; h = h1+ h 2;
f. and (3) a testing stage: after the seam clearance of the assembled box culvert is filled with water and soaked for 24 hours, keeping the plug on the water outlet sealed, opening the plug of the water inlet, connecting the water inlet with a water filling pipe on a manual pressure pump, checking the sealing condition of pipeline connection, measuring 3-5 liters of water by using a measuring cup, pouring the water into a water tank of the manual pressure pump, supplementing water and pressurizing the seam clearance of the assembled box culvert by using the manual pressure pump, starting timing when the test pressure reaches the specified pressure, observing the water seepage condition of the seam, supplementing water into the seam clearance of the assembled box culvert under the condition of keeping the test pressure p constant, wherein the observation time is more than or equal to 30min, and making data records, including the water supplement amount W, the actually measured water seepage observation time T and the length L of a test culvert section;
g. data processing and result analysis: calculating the actually measured water seepage amount, wherein the actually measured water seepage amount calculation formula is as follows:
q=W/(T×L）；
wherein: q is actually measured water seepage amount, L/(min m);
w is water supplement amount, L;
t-actually measured seepage observation time, min;
l is the length of the test culvert section, m;
when the measured water seepage amount is smaller than the allowable water seepage amount, the test is qualified, and the allowable water seepage amount is shown in figure 4.
The water inlet penetrates through the side wall of the tenon, and the water outlet penetrates through the top of the tenon.
The water inlet or the water outlet are both made of a PPR fiber composite water pipe with the length of 15-25 cm.
The water inlet or the water outlet is arranged in the middle of the width direction of the tenon of the box culvert, the water inlet is arranged at the position, 50-60 cm away from the bottom plate, of the side wall of the box culvert, the water outlet is arranged at the middle position of the top of the tenon, and the length of the water inlet or the water outlet, which is exposed out of the interior of the assembled box culvert, is 3-5 cm.
The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the product form and style of the above embodiments, and any method for rapidly detecting the waterproof quality of assembled box culvert joints according to the claims of the present invention and any suitable changes or modifications thereof by those skilled in the art shall fall within the protection scope of the present invention.
Claims (4)
1. A method for rapidly detecting the waterproof quality of a seam of an assembled box culvert is characterized by comprising the following steps: the method comprises the following steps: a. pre-burying a pipe opening: before the assembled box culvert is installed in a butt joint mode, a water inlet is pre-buried in the side wall of the tenon on the inner side of the assembled box culvert, and a water outlet is pre-buried in the top of the tenon on the inner side of the assembled box culvert;
b. and (3) mounting the assembled box culvert: carrying out the butt joint installation work of the conventional assembled box culvert;
c. a test preparation stage: checking a manual pressurizing pump: checking whether a pressure gauge on the manual pressure pump is normal, discharging air in the manual pressure pump and a water injection pipe, sealing the end of the water injection pipe by using a plug, then testing the pressure, stabilizing the pressure for 8-12 minutes when the pressure is increased to 1MPa, and checking whether the sealing condition and the manual pressure pump are damaged when the pressure is reduced on the premise that the pressure is not reduced;
checking whether the water inlet and the water outlet are smooth: if the water inlet or the water outlet is blocked and needs to be cleaned, simultaneously checking whether the end of the water pipe is damaged or not, if the end of the water pipe is damaged, cutting off the damaged part, and keeping enough exposed length to ensure that the water pipe is connected with the water injection pipe;
d. a water injection stage: connecting a water injection pipe on a manual pressure pump with a water inlet, continuously injecting water into the seam gap of the assembled box culvert through the water inlet by using the manual pressure pump, observing a water outlet at the top, indicating that air in the seam gap is completely removed when water flows out linearly from the water outlet, stopping injecting water, sealing the water inlet and the water outlet by using a plug, and soaking for not less than 24 hours;
e. calculating the experimental pressure: calculating test pressure according to the no-pressure condition, taking the net height h1 in the box culvert, calculating a water head h2, wherein h2 is 0.5-1.5 m, h = h1+ h2, and the calculation formula of the test pressure is as follows: p = ρ gh; wherein: p is the pressure; ρ is the liquid density; the density of the water is 1 multiplied by 10^3kg/m ^ 3; g is the gravity acceleration of 9.8N/kg; h = h1+ h 2;
f. and (3) a testing stage: after the seam clearance of the assembled box culvert is filled with water and soaked for 24 hours, keeping the plug on the water outlet sealed, opening the plug of the water inlet, connecting the water inlet with a water filling pipe on a manual pressure pump, checking the sealing condition of pipeline connection, measuring 3-5 liters of water by using a measuring cup, pouring the water into a water tank of the manual pressure pump, supplementing water and pressurizing the seam clearance of the assembled box culvert by using the manual pressure pump, starting timing when the test pressure reaches the specified pressure, observing the water seepage condition of the seam, supplementing water into the seam clearance of the assembled box culvert under the condition of keeping the test pressure p constant, wherein the observation time is more than or equal to 30min, and making data records, including the water supplement amount W, the actually measured water seepage observation time T and the length L of a test culvert section;
g. data processing and result analysis: calculating the actually measured water seepage amount, wherein the actually measured water seepage amount calculation formula is as follows:
q=W/(T×L）；
wherein: q is actually measured water seepage amount, L/(min m);
w is water supplement amount, L;
t-actually measured seepage observation time, min;
l is the length of the test culvert section, m;
and when the actually measured water seepage amount is smaller than the allowable water seepage amount, the test is qualified.
2. The method for rapidly detecting the waterproof quality of the assembled box culvert joint according to claim 1, wherein the method comprises the following steps: the water inlet penetrates through the side wall of the tenon, and the water outlet penetrates through the top of the tenon.
3. The method for rapidly detecting the waterproof quality of the assembled box culvert joint according to claim 1, wherein the method comprises the following steps: the water inlet or the water outlet are both made of a PPR fiber composite water pipe with the length of 15-25 cm.
4. The method for rapidly detecting the waterproof quality of the assembled box culvert joint according to claim 1, wherein the method comprises the following steps: the water inlet or the water outlet is arranged in the middle of the width direction of the tenon of the box culvert, the water inlet is arranged at the position, 50-60 cm away from the bottom plate, of the side wall of the box culvert, the water outlet is arranged at the middle position of the top of the tenon, and the length of the water inlet or the water outlet, which is exposed out of the interior of the assembled box culvert, is 3-5 cm.
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