Construction method for quickly dewatering residual water of foundation in high-pressure water zone

Abstract

The application discloses a construction method for quickly dewatering residual water of a foundation in a high-pressure water zone, and relates to the technical field of civil construction, which comprises the following steps: constructing a dewatering well to a range of 4 m below a foundation, and installing a filter pipe; filling impermeable materials in a range of 2 m at the bottom of the dewatering well and surrounding crevices; taking the foundation elevation as a boundary, filling high water-permeable filter materials around the dewatering well in a range of 2 m below the foundation to 1 m above the foundation; filling ordinary filter materials around the dewatering well above the foundation; lowering a water pump into the well and installing an automatic start-stop device of the water pump; starting dewatering until 500 mm below the foundation; constructing a foundation and sealing and filling the dewatering well, the range of 2 m at the bottom of the dewatering well and the surrounding crevices are filled with impermeable materials, which can reduce invalid construction on underground water below the elevation, and the range of 2 m below the foundation to 1 m above the foundation is filled with high water-permeable filter materials around the dewatering well, which can improve the dewatering construction efficiency on underground water above the elevation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of civil construction, in particular to a construction method for rapidly draining residual water of a foundation in a high-pressure water zone. BACKGROUND

[0002] An engineering project is located in a low-lying area, and the water level of the foundation is normally low, which slightly affects the foundation construction. However, due to long-time rainfall and soaking, the residual water of the foundation is relatively much, and the water pressure of the foundation is relatively high, which seriously affects the earthwork excavation and the foundation construction. In general engineering dewatering construction, a dewatering well is commonly used for dewatering to achieve the purpose of foundation construction. The method of well-point dewatering is used for the excavation of a deep and large foundation pit in a high-pressure water layer. Due to many factors affecting dewatering, the design and implementation of dewatering in a high-pressure water-bearing layer are difficult.

[0003] However, in the high-pressure water zone, the water level of the foundation is low, but the residual water is relatively much. The normal dewatering well is in an idle state most of the time, and the water pump needs to be real-time supervised by a special person, otherwise the equipment will be damaged, and the dewatering effect will be affected, and economic and construction period losses will occur. Therefore, the application provides a construction method for rapidly draining residual water of a foundation in a high-pressure water zone to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides a construction method for rapidly draining residual water of a foundation in a high-pressure water zone to solve the problems in the background art.

[0005] To achieve the above purpose, the application provides the following technical scheme: a construction method for rapidly draining residual water of a foundation in a high-pressure water zone, comprising the following steps:

[0006] S1, a dewatering well is constructed to a range of 4 m below the foundation, and a water filter pipe is installed;

[0007] S2, a range of 2 m at the bottom of the dewatering well and a surrounding gap are filled with impermeable materials;

[0008] S3, the dewatering well is filled with water-permeable filter material in a range of 2 m below the foundation to 1 m above the foundation, with the foundation elevation as a boundary;

[0009] S4, the dewatering well is filled with ordinary filter material above the foundation 1 m;

[0010] S5, a water pump is lowered into the well, and an automatic start-stop device of the water pump is installed;

[0011] S6, dewatering is started until 500 mm below the foundation;

[0012] S7, foundation construction, and the dewatering well is filled.

[0013] Further optimize the technical scheme, the pipe wall thickness of the water filtering pipe in step S1 is 10-12mm, and the diameter of the water filtering pipe is 40-50mm.

[0014] Further optimize the technical scheme, the mesh number of the water filtering pipe in step S1 is 30-50 mesh.

[0015] Further optimize the technical scheme, the water-impermeable material in step S2 is carbon fiber cloth or glass fiber cloth coated with polyurethane waterproof paint.

[0016] Further optimize the technical scheme, the high water permeable filter material in step S3 is an HDPE material filter.

[0017] Further optimize the technical scheme, the ordinary filter material in step S4 is a mixture of multi-faceted hollow spheres and coral sand.

[0018] Further optimize the technical scheme, the water pump automatic start-stop device in step S5 includes a circuit breaker, a contactor, a current sensor, a time control switch, and a control unit, and the circuit breaker, the contactor, and the current sensor are arranged on the main circuit of the water pump.

[0019] Further optimize the technical scheme, the contactor, the current sensor, and the time control switch are electrically connected to the control unit, and the control unit is a single-chip microcomputer.

[0020] Beneficial effects

[0021] Compared with the prior art, the present application provides a high-pressure water zone rapid dewatering construction method, which has the following beneficial effects:

[0022] 1. The high-pressure water zone rapid dewatering construction method, the present application fills the 2m range and the surrounding gap at the bottom of the dewatering well with water-impermeable material, which can reduce ineffective construction of groundwater below the elevation and improve effective construction of groundwater above the elevation, and the surrounding area of the dewatering well within 2m below the basement to 1m above the basement is filled with high water permeable filter material, which can improve the efficiency of dewatering construction of groundwater above the elevation, and the water pump automatic start-stop device is installed, which can reduce labor input and save costs.

[0023] 2. The high-pressure water zone rapid dewatering construction method, the construction method of the present application is simple to operate, novel, saves labor, reduces costs, can quickly dewater residual water in the range, saves construction period, and ensures the construction effect of the construction method. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 The present application provides a dewatering well structure diagram of a high-pressure water zone rapid dewatering construction method;

[0025] Fig. 2 A flowchart of a construction method of a high-pressure water zone rapid dewatering residual water foundation is provided. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0027] Embodiment one: please refer to Figs. 1-2 As shown in the figure, a high-pressure water zone rapid dewatering residual water construction method includes the following steps:

[0028] S1, construction of a dewatering well to a range of 4m below the foundation, installation of a filter pipe, the pipe wall thickness of the filter pipe is 12mm, the diameter of the filter pipe is 45mm, the mesh number of the filter pipe in step S1 is 50 mesh;

[0029] S2, filling the 2m range and the surrounding gap at the bottom of the dewatering well with impermeable material, the impermeable material is carbon fiber cloth or glass fiber cloth coated with polyurethane waterproof paint;

[0030] S3, taking the foundation elevation as the boundary, filling the high water permeable filter material around the dewatering well in the range of 2m below the foundation to 1m above the foundation, the high water permeable filter material is a filter material of HDPE material;

[0031] S4, filling the ordinary filter material around the dewatering well above the foundation, the ordinary filter material is a mixture of multi-faced hollow spheres and coral sand.

[0032] S5, pumping down the well, installing a water pump automatic start-stop device, the water pump automatic start-stop device includes a circuit breaker, a contactor, a current sensor, a time control switch and a control unit, the circuit breaker, the contactor and the current sensor are arranged on the main circuit of the water pump, the contactor, the current sensor and the time control switch are electrically connected with the control unit respectively, and the control unit is a single-chip microcomputer;

[0033] S6, start dewatering until 500mm below the foundation;

[0034] S7, foundation construction, dewatering well sealing and filling.

[0035] Embodiment two: please refer to Figs. 1-2 As shown in the figure, a high-pressure water zone rapid dewatering residual water construction method includes the following steps:

[0036] S1, the dewatering well is constructed to a range of 4m below the basement, filter pipe installation is carried out, the wall thickness of the filter pipe is 10mm, the diameter of the filter pipe is 40mm, and the mesh number of the filter pipe in the step S1 is 30 meshes;

[0037] S2, the bottom 2m range and the surrounding gap of the dewatering well are filled with water-impermeable materials, the water-impermeable materials are carbon fiber cloth or glass fiber cloth coated with polyurethane waterproof paint inside;

[0038] S3, the surrounding of the dewatering well in the range of 2m below the basement to 1m above the basement is filled with high water permeable filter material, and the high water permeable filter material is HDPE filter material;

[0039] S4, the surrounding of the dewatering well above the basement is filled with ordinary filter material, and the ordinary filter material is a mixture of multi-faceted hollow balls and coral sand;

[0040] S5, the water pump is lowered into the well, and a water pump automatic start-stop device is installed, the water pump automatic start-stop device comprises a circuit breaker, a contactor, a current sensor, a time control switch and a control unit, the circuit breaker, the contactor and the current sensor are arranged on the main circuit of the water pump, the contactor, the current sensor and the time control switch are electrically connected with the control unit respectively, and the control unit is a single-chip microcomputer;

[0041] S6, start dewatering until 500mm below the basement;

[0042] S7, foundation construction, dewatering well sealing.

[0043] Example three: please refer to Figs. 1-2 As shown in the figure, a construction method for quickly dewatering residual water of a high-pressure water zone, comprising the following steps:

[0044] S1, the dewatering well is constructed to a range of 4m below the basement, filter pipe installation is carried out, the wall thickness of the filter pipe is 12mm, the diameter of the filter pipe is 41mm, and the mesh number of the filter pipe in the step S1 is 38 meshes;

[0045] S2, the bottom 2m range and the surrounding gap of the dewatering well are filled with water-impermeable materials, the water-impermeable materials are carbon fiber cloth or glass fiber cloth coated with polyurethane waterproof paint inside;

[0046] S3, the surrounding of the dewatering well in the range of 2m below the basement to 1m above the basement is filled with high water permeable filter material, and the high water permeable filter material is HDPE filter material;

[0047] S4, the surrounding of the dewatering well above the basement is filled with ordinary filter material, and the ordinary filter material is a mixture of multi-faceted hollow balls and coral sand;

[0048] S5, the water pump is lowered into the well, and a water pump automatic start-stop device is installed, the water pump automatic start-stop device comprising a circuit breaker, a contactor, a current sensor, a time control switch and a control unit, the circuit breaker, the contactor and the current sensor being arranged on a main circuit of the water pump, the contactor, the current sensor and the time control switch being electrically connected to the control unit respectively, and the control unit being a single-chip microcomputer;

[0049] S6, starting dewatering until 500mm below the basement;

[0050] S7, foundation construction, and filling of the dewatering well.

[0051] Example four: please refer to Figs. 1-2 As shown in FIG. 4, a construction method for quickly dewatering residual water of a basement in a high-pressure water zone comprises the following steps:

[0052] S1, constructing a dewatering well to a range of 4m below the basement, installing a filter pipe, the filter pipe having a pipe wall thickness of 11mm and a diameter of 42mm, and the filter pipe in the step S1 having a mesh number of 35 meshes;

[0053] S2, filling a 2m range at the bottom of the dewatering well and a surrounding gap with impermeable materials, the impermeable materials being carbon fiber cloth or glass fiber cloth coated with polyurethane waterproof paint;

[0054] S3, taking the basement elevation as a boundary, filling the surrounding of the dewatering well in a range of 2m below the basement to 1m above the basement with high water permeable filter material, the high water permeable filter material being HDPE filter material;

[0055] S4, filling the surrounding of the dewatering well above the basement with ordinary filter material, the ordinary filter material being a mixture of multi-faced hollow balls and coral sand;

[0056] S5, the water pump is lowered into the well, and a water pump automatic start-stop device is installed, the water pump automatic start-stop device comprising a circuit breaker, a contactor, a current sensor, a time control switch and a control unit, the circuit breaker, the contactor and the current sensor being arranged on a main circuit of the water pump, the contactor, the current sensor and the time control switch being electrically connected to the control unit respectively, and the control unit being a single-chip microcomputer;

[0057] S6, starting dewatering until 500mm below the basement;

[0058] S7, foundation construction, and filling of the dewatering well.

[0059] Example five: please refer to Figs. 1-2 As shown in FIG. 5, a construction method for quickly dewatering residual water of a basement in a high-pressure water zone comprises the following steps:

[0060] S1, the precipitation well is constructed to the range of 4m below the basement, a filter pipe is installed, the thickness of the wall of the filter pipe is 10mm, the diameter of the filter pipe is 41mm, the mesh number of the filter pipe in the step S1 is 35 meshes;

[0061] S2, the range of 2m at the bottom of the precipitation well and the surrounding gap are filled with impermeable materials, the impermeable materials are carbon fiber cloth or glass fiber cloth coated with polyurethane waterproof paint;

[0062] S3, the range of 2m below the basement to 1m above the basement is filled with high water permeable filter material around the precipitation well, the high water permeable filter material is HDPE material;

[0063] S4, the range of 1m above the basement is filled with ordinary filter material around the precipitation well, the ordinary filter material is a mixture of multi-face hollow balls and coral sand;

[0064] S5, the water pump is lowered into the well, and a water pump automatic start-stop device is installed, the water pump automatic start-stop device comprises a circuit breaker, a contactor, a current sensor, a time control switch and a control unit, the circuit breaker, the contactor and the current sensor are arranged on the main circuit of the water pump, the contactor, the current sensor and the time control switch are electrically connected with the control unit respectively, and the control unit is a single-chip microcomputer;

[0065] S6, the precipitation is started until 400mm below the basement;

[0066] S7, the foundation is constructed, and the precipitation well is sealed and filled.

[0067] The judgment standard is that, through comparison of the five examples, the best effect is that of example one, therefore, example one is selected as the best example, and the change in the specific quantity also belongs to the protection range of the technical scheme.

[0068] The beneficial effects of the present application are that, the high-pressure water zone rapid dewatering basement residual water construction method, the range of 2m at the bottom of the precipitation well and the surrounding gap are filled with impermeable materials, this measure can reduce the invalid construction of the underground water below the elevation, improve the effective construction of the underground water above the elevation, the range of 2m below the basement to 1m above the basement is filled with high water permeable filter material around the precipitation well, this measure can strengthen the dewatering construction efficiency of the underground water above the elevation, the water pump automatic start-stop device is installed, this measure can reduce the labor input and save the cost; the construction method of the present application is simple to operate, the new construction method saves labor and reduces cost, can quickly dewater the residual water in the range, and saves the construction period.

[0069] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A construction method for quickly dewatering residual water in a high-pressure water zone, characterized in that, The method comprises the following steps: S1, the construction of the precipitation well is to the range of 4m below the basement, and the filter pipe is installed; S2, the range of 2m at the bottom of the precipitation well and the surrounding gap are filled with impermeable materials; S3, taking the basement elevation as the boundary, the range of 2m below the basement to 1m above the basement is filled with high water permeable filter material around the precipitation well; S4, the range of 1m above the basement around the precipitation well is filled with ordinary filter material; S5, the water pump is lowered into the well, and the automatic start-stop device of the water pump is installed; S6, the precipitation is started until 500mm below the basement; S7, the foundation is constructed, and the precipitation well is sealed and filled.

2. The construction method of claim 1, wherein, The thickness of the pipe wall of the filter pipe in the step S1 is 10-12mm, and the diameter of the filter pipe is 40-50mm.

3. The construction method of claim 1, wherein the method further comprises: The mesh number of the filter pipe in the step S1 is 30-50.

4. The construction method of claim 1, wherein, The impermeable material in the step S2 is carbon fiber cloth.

5. The construction method of claim 1, wherein the method further comprises: The high water permeable filter material in the step S3 is HDPE material filter material.

6. The construction method of claim 1, wherein the method further comprises: The ordinary filter material in the step S4 is a mixture of multi-faceted hollow balls and coral sand.

7. The construction method of claim 1, wherein the method further comprises: The automatic start-stop device of the water pump in the step S5 comprises a circuit breaker, a contactor, a current sensor, a time control switch and a control unit, and the circuit breaker, the contactor and the current sensor are arranged on the main circuit of the water pump.

8. The construction method of claim 7, wherein the method further comprises: The contactor, the current sensor and the time control switch are electrically connected with the control unit respectively, and the control unit is a single-chip microcomputer.

Images