CN217896594U - Leakage detection device for saturated soft soil deep foundation pit support structure - Google Patents
Leakage detection device for saturated soft soil deep foundation pit support structure Download PDFInfo
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- CN217896594U CN217896594U CN202221483528.5U CN202221483528U CN217896594U CN 217896594 U CN217896594 U CN 217896594U CN 202221483528 U CN202221483528 U CN 202221483528U CN 217896594 U CN217896594 U CN 217896594U
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Abstract
The utility model belongs to the technical field of construction and foundation pit enclosure, a leakage detection device to saturation weak soil deep basal pit retaining structure is disclosed, including first test tube, the vertical setting of first test tube is in the retaining structure of foundation pit, and first test tube is equipped with the sealing plug respectively at both ends, and the clear water is filled to intraductal the pouring of first test, and three-dimensional sonar detecting head can be followed the top of first test tube and transferred to arbitrary height department in the first test tube and gather test data. The utility model discloses a arrange first test tube in the envelope of foundation ditch, along with the condition of foundation ditch precipitation and layering excavation many times, can transfer three-dimensional sonar detection head in first test tube and carry out the seepage test of different precipitation degree of depth, be convenient for in time detect and judge the seepage point to ensure safe construction.
Description
Technical Field
The utility model relates to a construction and foundation ditch enclosure technical field especially relate to a seepage detection device to saturated weak soil deep basal pit retaining structure.
Background
In the building construction field, for the soft soil base region of rich water, like near the sea area, because the ground water level is high, under this kind of geology condition, the stagnant water problem of deep basal pit is comparatively outstanding. Especially, in the process of excavation of a foundation pit, if the enclosure structure leaks and the leaking stoppage is not in time, the consequences are very serious, so that the enclosure structure of the foundation pit is unstable and even collapses, the safety of surrounding buildings, underground pipe networks, roads and constructors is threatened, and the loss cannot be estimated.
Although construction units adopt various measures and strictly control construction quality, water leakage often occurs due to various reasons in the process of excavation of the foundation pit. Therefore, before the foundation pit is excavated, rapid and effective leakage detection is implemented, and leakage points are plugged in time according to detection results, so that the method is the key for ensuring the safety of the foundation pit and the surrounding environment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a seepage detection device to saturated weak soil deep basal pit retaining structure to solve saturated weak soil deep basal pit retaining structure and carry out the problem that the seepage detected at the foundation ditch excavation in-process.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a seepage detection device to saturated weak soil deep basal pit retaining structure, includes:
the three-dimensional sonar detection head comprises a first testing pipe which is vertically arranged in an enclosure structure of a foundation pit, sealing plugs are respectively arranged at two ends of the first testing pipe, clear water is filled in the first testing pipe, and the three-dimensional sonar detection head can be placed to any height in the first testing pipe from the top end of the first testing pipe to collect test data.
Optionally, the first test tube is provided with a plurality of, and a plurality of the first test tube sets up at interval in the envelope.
Optionally, the distance between two adjacent first test tubes is 5-6m.
Optionally, the first test tube is arranged on the reinforcement cage and is bound and fixed.
Optionally, the leakage detection device for the saturated soft soil deep foundation pit support structure further comprises a second test pipe, and the second test pipe is vertically arranged on the outer side of the foundation pit.
Optionally, the second test tube is arranged outside the foundation pit at a distance L from the edge of the foundation pit, and a tube core connecting line of the second test tube and the first test tube is perpendicular to the edge of the foundation pit.
Optionally, the distance L is 0.5-1.5m.
Optionally, the distance L is 1.0m.
Optionally, the second test tube is equipped with a plurality ofly, and is a plurality of the second test tube interval just evenly sets up the foundation ditch outside and with first test tube one-to-one sets up.
Optionally, the second test tube is provided with a plurality of, and is a plurality of the second test tube interval and evenly set up in the foundation ditch outside and with first test tube sets up in turn.
The utility model has the advantages that:
the utility model discloses a seepage detection device to saturated weak soil deep basal pit retaining structure, including the first test tube of vertical setting in foundation ditch retaining structure, the mountable is target in place along with retaining structure steel reinforcement cage ligature is fixed during foundation ditch construction promptly, does not influence existing construction progress and construction method, can realize the seepage detection to foundation ditch retaining structure, ensures safe construction,
Drawings
Fig. 1 is a schematic view of an arrangement structure of a first test tube in a leakage detection device for a saturated soft soil deep foundation pit support structure provided by the utility model;
fig. 2 is the utility model provides a pair of arrangement structure schematic diagram of second test tube in to saturated weak soil deep basal pit envelope's seepage detection device.
In the figure:
100. an enclosure structure; 200. a three-dimensional sonar probe;
1. a first test tube; 11. a sealing plug; 2. a second test tube.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The utility model provides a seepage detection device to saturated weak soil deep basal pit retaining structure, go up the sea area for example, the rich water of shanghai district, deep basal pit soil layer is softer, high and the bearing water layer of water level is shallow, it is dark to excavate, to the construction characteristics of the saturated weak soil deep basal pit that shanghai district has, the mode of precipitation, layering excavation is generally adopted in the foundation ditch construction many times, under the existing construction circumstances of not influencing, carry out the seepage test to foundation pit retaining structure, can provide reliable guarantee to construction safety.
The utility model provides a seepage detection device to saturated weak soil deep basal pit retaining structure, as shown in fig. 1, including first test tube 1, the vertical setting of first test tube 1 is in the retaining structure 100 of foundation ditch, and first test tube 1 is equipped with sealing plug 11 respectively at both ends, fills with the clear water in the first test tube 1, and three-dimensional sonar detection head 200 can be followed the top of first test tube 1 and transferred arbitrary high department in the first test tube 1 and gather test data.
It should be noted that, the first test tube 1 generally adopts a PVC (polyvinyl chloride) tube, and is arranged together with a reinforcement cage of the waterproof curtain enclosure structure 100 during construction, the first test tube 1 is arranged on the reinforcement cage and is bound and fixed, and two ends of the first test tube 1 are plugged to ensure smoothness. Wherein, the sealing plug 11 at the top of the first test tube 1 is detachable, so that the later stage can be disassembled and assembled as required. For a foundation pit construction mode of multiple precipitation and layered excavation, the water level in the foundation pit is lowered to the kth height, the top sealing plug 11 of the first test tube 1 is taken down, and clear water is injected into the first test tube 1 until the first test tube 1 is full of water; k is a positive integer, k =1, 2,3, … …; the three-dimensional sonar detection head 200 is a testing end of the three-dimensional sonar tester, and by using the first testing pipe 1 filled with pipe water, the three-dimensional sonar detection head 200 can detect the flow rate of water at the kth height position in the foundation pit support structure 100 to obtain kth testing data for judging foundation pit leakage and giving quantitative data characteristics so as to control leakage risks and guide construction excavation.
The utility model discloses a seepage detection device to saturated weak soil deep basal pit retaining structure through arranging first test tube 1 in foundation ditch retaining structure 100, does not influence current construction progress and construction mode, to the foundation ditch construction condition of precipitation and layering excavation many times, the seepage test of different precipitation degree of depth is carried out to three-dimensional sonar detecting head 200 in first test tube 1 below, is convenient for in time detect and judge the seepage point to ensure safe construction.
Optionally, the first testing pipes 1 are provided in plurality, and the plurality of first testing pipes 1 are arranged at intervals along the enclosure structure 100 of the foundation pit.
As shown in fig. 2, a plurality of first test tubes 1 are arranged along a support structure 100 of a foundation pit at intervals, and a specific interval distance and the number of the first test tubes 1 can be set according to specific detection precision requirements and experience of construction, and generally, an interval a between two adjacent first test tubes 1 is 5-6m. Taking the distance a as 6m as an example, the water flow rates at different positions at the same height can be tested between the two first test tubes 1, and the water flow rates at the same height can be compared and analyzed, so as to obtain more reliable data.
Optionally, the leakage detection device for the saturated soft soil deep foundation pit support structure further comprises a second test pipe 2, and the second test pipe 2 is vertically arranged on the outer side of the foundation pit.
As shown in fig. 2, since the construction process includes various operations such as dewatering and excavation, there is a possibility that the first test pipe 1 may be leaked or damaged, and thus it is necessary to perform necessary inspection on the first test pipe 1 before performing the water flow rate test to ensure accurate measurement of test data. In the event of a failure such as clogging of the first test tube 1, a second test tube 2 may be disposed in place of the first test tube 1. The second test tube 2 has the same structure as the first test tube 1 except for the position of arrangement. The second test tube 2 can be arranged simultaneously with the first test tube 1 during construction, and can also be arranged as a supplement to replace the first test tube 1 to finish detection when the first test tube 1 fails and cannot be detected.
In this embodiment, as shown in fig. 2, the second testing tube 2 is disposed outside the enclosure structure 100 of the foundation pit at a distance L from the edge of the foundation pit, and a connection line between the second testing tube 2 and the tube core of the first testing tube 1 that cannot be used is perpendicular to the edge of the foundation pit. In particular, the distance L is between 0.5 and 1.5m, preferably 1m.
In some embodiments, the second testing pipes 2 are arranged at the positions 1m away from the positions corresponding to the first testing pipes 1, the number of the second testing pipes 2 is the same as that of the first testing pipes 1, the second testing pipes 2 correspond to the first testing pipes 1 one by one, so that the water loss of the foundation pit support structure 100 outside the foundation pit is measured, and the measurement data of the first testing pipes 1 and the measurement data of the second testing pipes 2 can be compared to obtain more accurate measurement data.
In other embodiments, the second test tubes 2 and the first test tubes 1 are respectively arranged on the inner side and the outer side of the foundation pit and are alternately arranged, that is, on the basis of the arrangement of the existing first test tubes 1, the middle first test tube 1 in every three adjacent first test tubes 1 is removed and replaced by the second test tube 2 outside the foundation pit, and the second test tube 2 is located on the perpendicular bisector of the tube core connecting line of the two first test tubes 1 and is located at 1m outside the foundation pit. So set up, can avoid because first test tube 1 probably causes the problem production of destruction influence test because of the construction in the foundation ditch, second test tube 2 sets up and is difficult to destroyed in the foundation ditch outside, consequently can test simultaneously with first test tube 1, removed from and set up the construction progress problem that second test tube 2 brought again after first test tube 1 breaks down from, consequently second test tube 2 does not have the influence to the measuring accuracy, and do benefit to and improve efficiency of software testing. The second test tube 2 is squeezed into in the construction of being convenient for outside the foundation ditch, and the second test tube 2 of just arranging also is difficult for receiving destruction. The second test pipe 2 is arranged outside the foundation pit, and feasibility is provided when the method is used for testing due to potential risks found before excavation as no test preparation measures are taken in advance.
In other embodiments, the second testing pipes 2 may also be separately arranged, the plurality of second testing pipes 2 are uniformly arranged at the outer edge 1m of the foundation pit at intervals, and the distance between two adjacent second testing pipes 2 is a. Under the condition, the first test pipe 1 is not arranged in the enclosure structure 100 of the foundation pit, so that the first test pipe 1 is prevented from being failed possibly caused by construction, and the acquisition of test data is prevented from being influenced.
The utility model discloses to the characteristics of rich water deep basal pit soil layer softer, high, the confined water layer of shanghai region shallow, the excavation is dark, adopt three-dimensional sonar to carry out seepage detection method and device, can divide the condition of precipitation, layering excavation many times at the foundation ditch under, judge the detection to the seepage condition of different precipitation degree of depth, can ensure the safe implementation of deep basal pit excavation process.
Use the utility model provides a to saturated weak soil deep basal pit retaining structure's seepage detection device, when testing, three-dimensional sonar probe 200 needs k test data of k high departments in every first test pipe 1 and/or second test pipe 2, and the spacing distance is 1/5-1/3H between two adjacent heights, and H is the foundation ditch degree of depth. As shown in figure 2, precipitation is carried out after the foundation pit is excavated according to the final design depth H of the foundation pit, when the water level of precipitation reaches 1/5-1/3 of the excavation depth, the requirement of the water head difference of the three-dimensional sonar detection head 200 is met, the test is started, in the batch precipitation process, for example, the 1/3H position is used for starting the first detection, and the test is carried out when the water level of precipitation reaches the 2/3H of the foundation pit and the bottom of the foundation pit each time. It should be noted that, in order to adapt to the original construction condition, 2/3 of the original construction condition does not exist, so that the height at the second test can be selected to be a variable height such as 1/4 of the original construction condition, and the height difference of two measurements can be generally between 1/5 and 1/3 of the original construction condition.
At the kth height of each first test tube 1, the three-dimensional sonar probe 200 collects a plurality of kth test data at a plurality of heights of each first test tube 1. During testing, the three-dimensional sonar detection head 200 is placed at the top of the first testing pipe 1, in the embodiment, the interval of 1m is used as a testing point, the three-dimensional sonar detection head 200 stays at least one minute at each testing point to measure the water flow rate, and data of each testing point are directly uploaded and automatically stored after the data of each testing point are finished; the measurement of the next test point is then continued until the bottom of the well. And subsequently analyzing the acquired data to obtain the water flow rate value of each test point. Comparing the test data of a plurality of times in the same first test tube 1, giving the test data of the water flow rate in each first test tube 1, dividing the leakage risk of the foundation pit into four levels according to the flow rate, wherein the four levels are respectively as follows:
(1) Flow rate < 10 -5 cm/s, the seepage-proofing performance of the enclosure structure 100 of the foundation pit can be judged to be qualified;
(2)10 -5 flow rate is less than or equal to 10 cm/s -4 cm/s, the seepage-proofing performance of the enclosure structure 100 of the foundation pit can be basically judged to be qualified;
(3) Flow rate 10 -4 Flow rate is less than or equal to 10 cm/s -3 cm/s, setting an emergency disposal scheme for subsequent construction;
(4) The flow rate is more than or equal to 10 -3 cm/s, the seepage-proofing performance of the enclosure structure 100 of the foundation pit at the position has a great defect, and reinforcement treatment should be carried out.
Therefore, according to the test of the water flow velocity by the multiple precipitation and the multiple three-dimensional sonar detection head 200, the water flow velocity signal in the enclosure structure 100 of the foundation pit can be accurately analyzed, so that guidance and suggestions are provided for construction safety, and the method has great significance for safe construction.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a seepage detection device to saturated weak soil deep basal pit retaining structure which characterized in that includes:
first test tube (1), first test tube (1) is vertical to be set up in envelope (100) of foundation ditch, first test tube (1) is equipped with sealing plug (11) respectively at both ends, fill up the clear water in first test tube (1), three-dimensional sonar detection head (200) can be followed the top of first test tube (1) is transferred and is arrived arbitrary high department in first test tube (1) gathers test data.
2. The leakage detection device for the saturated soft soil deep foundation pit enclosure structure according to claim 1, wherein the number of the first test pipes (1) is multiple, and the multiple first test pipes (1) are arranged in the enclosure structure (100) at intervals.
3. The leakage detection device for the saturated soft soil deep foundation pit support structure according to claim 2, wherein the distance between two adjacent first test pipes (1) is 5-6m.
4. The leakage detection device for the saturated soft soil deep foundation pit support structure according to claim 2, wherein the first test pipe (1) is arranged on a reinforcement cage and is bound and fixed.
5. The leakage detection device for the saturated soft soil deep foundation pit support structure according to claim 2, further comprising a second test pipe (2), wherein the second test pipe (2) is vertically arranged at the outer side of the foundation pit.
6. The seepage detection apparatus for a saturated soft soil deep foundation pit enclosure according to claim 5, wherein the second test tube (2) is arranged outside the foundation pit at a distance L from the edge of the foundation pit, and the tube core connection line of the second test tube (2) and the first test tube (1) is perpendicular to the edge of the foundation pit.
7. The leakage detection device for the saturated soft soil deep foundation pit support structure according to claim 6, wherein the distance L is 0.5-1.5m.
8. The apparatus of claim 7, wherein the distance L is 1.0m.
9. A seepage detection device for a saturated soft soil deep foundation pit support structure according to any one of claims 5-8, wherein the second test pipes (2) are provided in plurality, and the second test pipes (2) are arranged at intervals and uniformly outside the foundation pit and are arranged in one-to-one correspondence with the first test pipes (1).
10. A leakage detection device for a saturated soft soil deep foundation pit support structure according to any one of claims 5-8, wherein the second test pipes (2) are provided in plurality, and the second test pipes (2) are arranged at intervals and uniformly outside the foundation pit and are arranged alternately with the first test pipes (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221483528.5U CN217896594U (en) | 2022-06-14 | 2022-06-14 | Leakage detection device for saturated soft soil deep foundation pit support structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221483528.5U CN217896594U (en) | 2022-06-14 | 2022-06-14 | Leakage detection device for saturated soft soil deep foundation pit support structure |
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| CN217896594U true CN217896594U (en) | 2022-11-25 |
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| CN202221483528.5U Active CN217896594U (en) | 2022-06-14 | 2022-06-14 | Leakage detection device for saturated soft soil deep foundation pit support structure |
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