CN112763142B - Underground water sealed cave depot construction roadway refined water storage test method - Google Patents

Underground water sealed cave depot construction roadway refined water storage test method Download PDF

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CN112763142B
CN112763142B CN202011587598.0A CN202011587598A CN112763142B CN 112763142 B CN112763142 B CN 112763142B CN 202011587598 A CN202011587598 A CN 202011587598A CN 112763142 B CN112763142 B CN 112763142B
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water storage
water
test
construction
roadway
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CN112763142A (en
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石磊
张彬
张建伟
彭振华
李俊彦
边汉亮
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Henan University
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract

The invention discloses a refined water storage test method for a construction roadway of an underground water sealed cave depot, which comprises S1, determining the vertical height H1 of water storage of a single experimental section and S under a state of no water storage0(ii) a S2, testing according to the parameters determined in the preparation stage, recording the values of the water inflow at the beginning and the end of each test section, setting the equivalent seepage constant of any test section a as Sa, and comparing SaAnd S0The size of (d); if Sa>S0And further calculates Δ S/S0Then, grouting treatment is carried out on the area of the test section needing grouting; if S isaAnd S0Substantially equal, the next test segment can be directly detected. The method for the refined water storage test of the construction roadway of the underground water seal cave depot carries out scientific refined management on the water storage stage of the construction roadway, can identify the seepage channel between the construction roadway and the main cavern in the process of water storage again without adding additional working procedures, and adopts a mode of detecting and treating simultaneously to shorten the construction period as far as possible and save financial resources.

Description

Underground water sealed cave depot construction roadway refined water storage test method
Technical Field
The invention relates to a fine water storage test method for a construction roadway of an underground water sealed cave depot.
Background
The underground water-sealed cave depot has the advantages of safety, environmental protection, low manufacturing cost and the like, and is a petroleum storage mode which is widely popularized in China at present. Before the underground water-sealed cave depot enters an oil storage state, the construction roadway needs to be subjected to water storage to a certain height so as to ensure the air tightness of the cave depot.
The underground water seal cave depot is usually built in a hard rock mass, cracks in the rock mass develop quite complexly, and a seepage channel may exist between a construction roadway and a main cave. If a seepage channel exists, on one hand, the water inflow of the cavern is increased, and the operation cost is increased; on the other hand, the long-term operation safety of the cave depot can be influenced. And the seepage channel between the construction roadway and the main cavern cannot be comprehensively detected only by a geological sketch and a geophysical prospecting means in the construction period. Meanwhile, the underground water-sealed cave depot engineering has large scale, which causes a problem in the existing exploration technology: even if a plurality of investigation means are integrated, the crack distribution of the rock mass is difficult to implement fine description, and the ideal effect cannot be achieved due to time and money consumption.
The water storage process of the construction roadway can be regarded as a large-scale project in-situ test, the hydraulic connection between the construction roadway and the main cavern can be well reflected, then the grouting area cannot be found in time by the existing water storage method, the treatment cost is increased, and the construction period can be prolonged better, for example, the invention patent with the publication number of CN110348736A, namely the centralized seepage section identification method of the construction roadway of the underground sealed cavern reservoir, adopts the steps of storing water in the construction roadway to the target water storage height, and then comparing the actually measured seepage quantity with the simulated seepage quantity of the three-dimensional numerical model to judge whether a seepage section exists. The method generally needs to establish a three-dimensional numerical model to simulate the water seepage point of the construction roadway, and the numerical simulation means has strong uncertainty, which can cause inaccuracy of the conclusion.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, a grouting area cannot be found in time in the water storage process of an underground water seal cave depot construction roadway, the cost is increased due to treatment, and the construction period can be prolonged, and provides a refined water storage test method for the underground water seal cave depot construction roadway.
In order to solve the technical problems, the invention provides the following technical scheme:
a fine water storage test method for a construction roadway of an underground water sealed cave depot comprises the following steps:
s1, determining the vertical height H of water stored in a single experimental section1And equivalent seepage constant S in the state of not storing water0
The equivalent seepage constant of the ideal working condition under the state of not storing water is S0，
Order S0＝Q(0)/(Hw-H0)
Wherein Q (0) is the water consumption of the main cavern before water storage of the construction roadway, Hw is the central elevation of the cross section of the water curtain system, and H is0Is the central elevation of the section of the main chamber;
constructing the water storage level H of the tunnel according to the final stateopDetermining the vertical height H of the water stored in the single test by combining the elevation of the concrete plug and the number n of times of the simulation test1，H1＝HopN; water storage level H of final-state construction roadwayopAnd determining according to the operation pressure of the cave depot, the water seal safety coefficient and other related parameters.
Preferably, the setting of the times suggests that the vertical height is about 2m, such as 2 ± 0.2m, as a water storage unit; but the concrete condition can be adjusted according to the existing construction roadway crack distribution rule mastered in the construction period, and the vertical height of the water storage can be properly adjusted to be small at the joint dense zone.
S2, testing according to the parameters determined in the preparation stage
The values of water inflow at the beginning and end of each test session were recorded: q ((a-1) H1) And (Q (aH)1))，a＝1,2,3…；
The equivalent seepage constant of any test segment a is Sa, Sa ═ Q (aH)1)-Q((a-1)H1))/H1Comparison SaAnd S0The size of (d);
if Sa>S0And further calculates Δ S/S0Then, grouting treatment is carried out on the area of the test section needing grouting;
if S isaAnd S0Substantially equal, the next test segment can be directly detected. Preferably, when Δ S/S0(ii) determination of S at < 0.01aAnd S0Are substantially equal. Wherein Δ S ═ Sa-S0；
Furthermore, the grouting treatment method in S2 comprises the steps of firstly pumping out water in an experimental section to be detected of the construction roadway, then carrying out fine investigation on the experimental section by means of physical exploration, determining a grouting area by combining a geological sketch map in the construction period, and carrying out grouting treatment on the determined area to carry out the next stage of test.
Further, the means of physical exploration is one or more of high density electrical methods, geological radars and transient electromagnetic.
The method for the refined water storage test of the construction roadway of the underground water seal cave depot carries out scientific refined management on the water storage stage of the construction roadway, has strong operability, does not need to carry out numerical simulation to establish a three-dimensional numerical model, only needs the water quantity of each stage, is convenient and direct, is free from the influence of other factors, and ensures the accuracy of the result. Under the condition that no additional process is added, the seepage channel between the construction roadway and the main cavern can be identified in the water storage process, and the mode of detecting and treating simultaneously is adopted, so that the construction period is shortened as far as possible, and the financial resources are saved. The method for identifying the seepage channel between the construction roadway and the main cavern is reliable, convenient and quick, and can achieve the purpose by using the most easily obtained data.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of an embodiment.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Examples
A fine water storage test method for a construction roadway of an underground water sealed cave depot comprises the following steps:
s1, determining the vertical height H of water stored in a single experimental section1And equivalent seepage constant S in the state of not storing water0
State of not storing waterThe equivalent seepage constant of the ideal working condition is S0，
Order S0＝Q(0)/(Hw-H0)
Wherein Q (0) is the water consumption of the main cavern before water storage of the construction roadway, Hw is the central elevation of the cross section of the water curtain system, and H is0Is the central elevation of the section of the main chamber;
constructing the water storage level H of the tunnel according to the final stateopDetermining the vertical height H of the water stored in the single test by combining the elevation of the concrete plug and the number n of times of the simulation test1，H1＝HopN; water storage level H of final-state construction roadwayopAnd determining according to the operation pressure of the cave depot, the water seal safety coefficient and other related parameters.
Proposing H when setting the number n of times of the simulation test1The water storage depth is about 2m, but the concrete condition can be adjusted according to the existing construction roadway fracture distribution rule mastered in the construction period, and the vertical height of water storage can be properly adjusted to be small at the joint dense zone.
S2, testing according to the parameters determined in the preparation stage
The values of water inflow at the beginning and end of each test session were recorded: q ((a-1) H1) And (Q (aH)1))(a＝1,2,3…)；
The equivalent seepage constant of any a test section is Sa，Sa＝(Q(aH1)-Q((a-1)H1))/H1Comparison SaAnd S0The size of (d);
if Sa>S0And further calculates Δ S/S0Go to S3;
if S isaAnd S0Substantially equal, the next test segment can be directly detected. When Δ S/S0(ii) determination of S at < 0.01aAnd S0Are substantially equal. Wherein Δ S ═ Sa-S0；
S3, grouting the area of the test section which needs grouting; the grouting treatment method comprises the steps of firstly pumping out water of an experimental section to be detected of a construction roadway, then carrying out fine investigation on the experimental section by means of physical exploration such as a high-density electrical method, a geological radar and transient electromagnetism, determining a grouting area by combining a geological sketch map in a construction period, and carrying out grouting treatment on the determined area to carry out a next-stage test.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A fine water storage test method for a construction roadway of an underground water sealed cave depot is characterized by comprising the following steps:
s1, determining the vertical height H of water stored in a single experimental section1And equivalent seepage constant S in the state of not storing water0
The equivalent seepage constant of the ideal working condition under the state of not storing water is S0，
Order S0＝Q(0)/(Hw-H0)
Wherein Q (0) is the water consumption of the main cavern before water storage of the construction roadway, Hw is the central elevation of the cross section of the water curtain system, and H is0Is the central elevation of the section of the main chamber;
constructing the water storage level H of the tunnel according to the final stateopDetermining the vertical height H of the water stored in the single test by combining the elevation of the concrete plug and the number n of times of the simulation test1，H1＝Hop/n；
S2, testing according to the parameters determined in the preparation stage
The values of water inflow at the beginning and end of each test session were recorded: q ((a-1) H1) And (Q (aH)1))，a＝1,2,3…；
The equivalent seepage constant of any a test section is Sa，Sa＝(Q(aH1)-Q((a-1)H1))/H1Comparison SaAnd S0The size of (d);
if Sa>S0And further calculates Δ S/S0Then, grouting treatment is carried out on the area of the test section needing grouting; wherein Δ S ═ Sa-S0；
If S/S0(ii) determination of S at < 0.01aAnd S0Substantially equal, the next test segment can be directly detected.
2. The method for the refined water storage test of the construction roadway of the underground water seal cave depot according to claim 1, wherein the grouting treatment in S2 comprises the steps of firstly pumping out water in a test section to be detected of the construction roadway, then carrying out refined investigation on the test section by means of physical exploration, determining a grouting area by combining with a geological sketch map in a construction period, and carrying out the next stage of test after the grouting treatment is carried out on the determined area.
3. The method for the refined water storage test of the underground water seal cave depot construction roadway, which is characterized in that the physical exploration means is one or more of a high-density electrical method, a geological radar and transient electromagnetism.
4. The refined water storage test method for the underground water seal cave depot construction roadway as claimed in claim 1, wherein the water storage level H of the final state construction roadwayopAnd determining according to the operation pressure of the cave depot and the water seal safety coefficient.
5. The refined water storage test method for the underground water seal cave depot construction roadway, which is characterized in that H is1＝2m±0.2m。
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CN104763449A (en) * 2015-02-04 2015-07-08 清华大学 Design method for water curtain system of underground water seal cave depot
CN205593980U (en) * 2015-12-31 2016-09-21 山东科技大学 Similar physical simulation testing system of deep tunnel country rock gushing water
CN108627436A (en) * 2017-03-20 2018-10-09 中国海洋石油集团有限公司 A kind of prediction technique of the underground water-seal oil depot water yield based on construction dynamic monitoring data
CN109342093A (en) * 2018-09-05 2019-02-15 中国地质大学（北京） A kind of underground water-seal oil depot country rock dominant flowing path discrimination method
CN110307017A (en) * 2019-06-11 2019-10-08 长沙理工大学 A kind of underground water seal cave depot seepage field intelligent control system and regulation method
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JP2001004576A (en) * 1999-06-24 2001-01-12 Ohbayashi Corp Measuring method for degree of saturation of moisture in excavation of tunnel,
CN104632203A (en) * 2014-12-31 2015-05-20 中铁二局第二工程有限公司 Method for detecting quality of water curtain of underground storehouse by adopting transient electromagnetic method
CN104763449A (en) * 2015-02-04 2015-07-08 清华大学 Design method for water curtain system of underground water seal cave depot
CN205593980U (en) * 2015-12-31 2016-09-21 山东科技大学 Similar physical simulation testing system of deep tunnel country rock gushing water
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CN109342093A (en) * 2018-09-05 2019-02-15 中国地质大学（北京） A kind of underground water-seal oil depot country rock dominant flowing path discrimination method
CN110307017A (en) * 2019-06-11 2019-10-08 长沙理工大学 A kind of underground water seal cave depot seepage field intelligent control system and regulation method
CN110348736A (en) * 2019-07-10 2019-10-18 中国海洋石油集团有限公司 A kind of underground water seal cave depot construction tunnel concentrative seepage section recognition methods
CN111260216A (en) * 2020-01-15 2020-06-09 山东大学 Comprehensive evaluation and prevention method for seepage field of underground water-seal oil storage warehouse in operation period

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