Formwork device and formwork method for underground deep hole wall protection

Abstract

The present application relates to the field of deep hole construction, and discloses a formwork device for underground deep hole and a formwork erecting method.The formwork device for underground deep hole comprises a formwork unit, a central framework, an upper support sliding unit and a lower support sliding unit.The upper support sliding unit and the lower support sliding unit each comprise at least one support disc, and are sleeved on the central framework through the support disc and can slide up and down on the central framework.The upper support sliding unit is located above the lower support sliding unit.The support disc of the upper support sliding unit and the support disc of the lower support sliding unit are each hinged with a support rod.Each support rod is respectively hinged with a formwork unit.Each formwork unit is unfolded to form a complete formwork.The formwork device can be hoisted in the underground deep hole by moving the upper support sliding unit and the lower support sliding unit to control the unfolding and contraction of the formwork unit, and can realize rapid formwork erecting and rapid formwork stripping.The whole process is convenient and fast, and the formwork device is simple to use and has high formwork erecting efficiency.

Description

Technical Field

[0001] This invention relates to the field of deep hole construction, and in particular to a formwork device and support method for underground deep hole wall protection. Background Technology

[0002] Currently, underground borehole construction is increasingly common in my country, with applications spanning a wide range of fields, such as underground pile foundation construction and farmland irrigation wells. During the construction of most deep boreholes, to prevent collapse, it is necessary to excavate a section of the borehole deeper and then reinforce it with a section of wall. To ensure that the borehole does not collapse due to water seepage, existing support methods primarily rely on cast-in-place concrete. However, the formwork technology for cast-in-place concrete is still relatively outdated, with most methods using small steel formwork paired with scaffolding. This method is not only inefficient but also produces poor forming quality. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a formwork device and support method for underground deep hole wall protection, which improves construction efficiency and ensures project quality.

[0004] The template device for underground deep hole retaining wall disclosed in this invention includes a template unit, a central frame, an upper support sliding unit, and a lower support sliding unit. The upper support sliding unit includes at least one support plate, which is sleeved on the central frame and can slide up and down along the central frame. The lower support sliding unit includes at least one support plate, which is sleeved on the central frame and can slide up and down along the central frame. The upper support sliding unit is located above the lower support sliding unit. Both the support plates of the upper and lower support sliding units are hinged with struts. Each strut is hinged to a template unit. When unfolded, the template units form a complete template. The bottom of the central frame is provided with a stop structure for limiting the upper and lower support sliding units.

[0005] Preferably, a hanger is provided above the central frame.

[0006] Preferably, the upper support sliding unit is provided with a movable hanging plate at the top, the movable hanging plate is connected to the support plate of the upper support sliding unit through a connector, the hanging rod is connected to the movable hanging plate, and the top of the central frame is provided with a limiting structure for limiting the upper support sliding unit.

[0007] Preferably, the movable hanging platform is provided with a pin hole, the top of the central frame is provided with a long slot along the vertical direction, the limiting structure is an upper pin, the upper pin passes through the pin hole and the long slot, and the hanging rod is connected to the upper support sliding unit through the upper pin.

[0008] Preferably, the central frame is provided with a positioning hole, which is located above the support plate of the upper support sliding unit in the unfolded state of the template unit, and the positioning hole is provided with a lower pin for restricting the template unit in the unfolded state.

[0009] Preferably, the template unit is provided with an L-shaped slot near the side, the L-shaped slots of adjacent template units are positioned correspondingly, and a baffle spanning the template unit is provided in the L-shaped slot.

[0010] Preferably, each support plate of the upper support sliding unit and each support plate of the lower support sliding unit are symmetrically connected with two struts, and the struts of the upper support sliding unit and the struts of the lower support sliding unit are arranged in a cross shape. The number of template units is four, and the four template units are respectively connected to the outer ends of the struts arranged in a cross shape.

[0011] Preferably, both the upper and lower support sliding units are provided with two support plates along their vertical direction. The upper and lower support plates of the upper support sliding unit are connected by a connector, and the upper and lower support plates of the lower support sliding unit are connected by a connector. The same template unit is connected to the upper and lower support plates of the upper or lower support sliding unit by two upper and lower struts.

[0012] The present invention also discloses a formwork support method using the aforementioned formwork device for underground deep hole wall protection, comprising the following steps:

[0013] With the template unit in the retracted state, the template device is hoisted to the bottom of the hole;

[0014] The upper and lower support sliding units move, causing the template unit to unfold and achieve formwork support;

[0015] After the deep hole wall is poured to the required strength, the upper and lower support sliding units move, and the template unit shrinks to complete demolding.

[0016] Preferably, a hanging rod is provided above the central frame, a movable hanging plate is provided on the top of the upper support sliding unit, the movable hanging plate is connected to the support plate of the upper support sliding unit through a connector, the hanging rod is connected to the movable hanging plate, a limiting structure for limiting the upper support sliding unit is provided on the top of the central frame, a pin hole is provided on the movable hanging plate, a long slot is provided on the top of the central frame along the vertical direction, the limiting structure is an upper pin, the upper pin passes through the pin hole and the long slot, and the hanging rod is connected to the upper support sliding unit through the upper pin;

[0017] When hoisting the formwork device, it is hoisted by a hoisting rod. The upper support sliding unit rises to the upper limit position with the hoisting rod. The formwork unit corresponding to the upper support sliding unit swings downward, and the other formwork units also swing downward, so that the formwork unit is in a retracted state.

[0018] After the template device is hoisted into the bottom of the hole, the hoisting rod is lowered, and the upper support sliding unit and the lower support sliding unit move downward under the action of gravity, and the template unit unfolds automatically;

[0019] Insert the lower pin into the positioning hole of the central skeleton to confine the template unit in the unfolded state;

[0020] After the deep hole wall is poured to the required strength, the lower pin is pulled out, and the formwork device is lifted by the lifting rod. The upper support sliding unit moves upward first, so that the corresponding formwork unit is demolded. Then the lower support sliding unit is lifted and the corresponding formwork is also demolded.

[0021] The beneficial effects of the present invention are: the template device controls the expansion and contraction of the template unit by moving the upper support sliding unit and the lower support sliding unit, which can be easily hoisted into the deep underground hole and realize rapid formwork erection and rapid demolding. The whole process is convenient and quick, easy to use, and has high formwork erection efficiency. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of the template device of the present invention;

[0023] Figure 2 This is a schematic diagram of the upper support sliding unit;

[0024] Figure 3 This is a schematic diagram of the lower support sliding unit;

[0025] Figure 4 This is an assembly diagram of the central frame, upper support sliding unit, and lower support sliding unit;

[0026] Figure 5 yes Figure 4 A diagram illustrating the installation of a support rod;

[0027] Figure 6 This is a schematic diagram of the template device in its unfolded formwork support state;

[0028] Figure 7 This is a top view of the unfolded template device;

[0029] Figure 8 This is a schematic diagram of the template device shrinking;

[0030] Figure 9 This is a top view of the template device in retraction.

[0031] Reference numerals: template unit 1, L-shaped slot 101, baffle 102, central frame 2, long slot 201, stop structure 202, upper support sliding unit 3, movable hanging plate 301, lower support sliding unit 4, strut 5, upper pin 6, lower pin 7, support plate 8, connector 9, hanging rod 10, template device 100, wall protection 200. Detailed Implementation

[0032] The present invention will be further described below.

[0033] like Figure 1 As shown, the template device 100 for underground deep hole retaining wall disclosed in this invention includes a template unit 1, a central frame 2, an upper support sliding unit 3, and a lower support sliding unit 4. The upper support sliding unit 3 includes at least one support plate 8, which is sleeved on the central frame 2 and can slide up and down along the central frame 2. The lower support sliding unit 4 includes at least one support plate 8, which is sleeved on the central frame 2 and can slide up and down along the central frame 2. The upper support sliding unit 3 is located above the lower support sliding unit 4. Both the support plate 8 of the upper support sliding unit 3 and the support plate 8 of the lower support sliding unit 4 are hinged with support rods 5. The template unit 1 has an ear seat on its inner side, and each support rod 5 is hinged to the template unit 1 through the ear seat. Each template unit 1 unfolds to form a complete template. The bottom of the central frame 2 is provided with a stop structure 202 for limiting the upper support sliding unit 3 and the lower support sliding unit 4. The stop structure 202 is usually a stop plate.

[0034] Both the upper support sliding unit 3 and the lower support sliding unit 4 can move up and down along the central frame 2. The support plates 8 of both the upper and lower support sliding units 3 and 4 are hinged to the template unit 1 via struts 5. By moving the upper and lower support sliding units 3 and 4 up and down, the template units 1 can be expanded and contracted. When expanded, the template units 1 form a complete template; when contracted, they facilitate insertion and removal from deep holes. The formwork support method using this template device 100 includes the following steps:

[0035] like Figure 8 and 9 As shown, with template unit 1 in the retracted state, template device 100 is hoisted to the bottom of the hole;

[0036] like Figure 6 and 7 As shown, the upper support sliding unit 3 and the lower support sliding unit 4 move, causing the template unit 1 to unfold and achieve formwork support;

[0037] After the deep hole wall protection 200 reaches the strength requirement, the upper support sliding unit 3 and the lower support sliding unit 4 move, and the template unit 1 shrinks to complete demolding.

[0038] To facilitate the hoisting of the template device 100, a lifting rod 10 is provided above the central frame 2. The expansion and contraction of the template unit 1 can be achieved by manually moving the upper support sliding unit 3 and the lower support sliding unit 4. However, in the preferred embodiment of this application, gravity is used to achieve the expansion and contraction of the template unit 1. Specifically, a movable lifting plate 301 is provided at the top of the upper support sliding unit 3. The movable lifting plate 301 is connected to the support plate 8 of the upper support sliding unit 3 via a connector 9. The lifting rod 10 is connected to the movable lifting plate 301. A limiting structure for limiting the upper support sliding unit 3 is provided at the top of the central frame 2. Since the lifting rod 10 is connected to the upper support sliding unit 3 via the movable lifting plate 301, when lifting with the lifting rod 10, the upper support sliding unit 3 will first move upwards, thereby causing the corresponding template unit 1 to contract. The limiting structure prevents the upper support sliding unit 3 from moving excessively upwards and falling off.

[0039] The limiting structure can be a limiting block, a limiting disk, etc., such as Figure 4 and 5 As shown, in a preferred embodiment of this application, the movable hanging plate 301 has a pin hole, and the top of the central frame 2 has a vertically arranged elongated slot 201. The limiting structure is an upper pin 6, which passes through the pin hole and the elongated slot 201. The hanging rod 10 is connected to the upper support sliding unit 3 through the upper pin 6. The upper pin 6 can only move up and down within the range of the elongated slot 201, so the upper support sliding unit 3 can only move within this distance and will not fall off.

[0040] After the template unit 1 is deployed, it is necessary to prevent it from retracting. Temporary structures can usually be used for support. However, in the preferred embodiment of this application, such as... Figure 4 and 5 As shown, the central frame 2 is provided with a positioning hole, which is located above the support plate 8 of the upper support sliding unit 3 when the template unit 1 is in the unfolded state. The positioning hole is provided with a lower pin 7 for restricting the template unit 1 in the unfolded state. When the template unit 1 is unfolded for formwork support, the lower pin 7 can be inserted into the positioning hole to restrict the position of the upper support sliding unit 3. At the same time, the upper support sliding unit 3 is above the lower support sliding unit 4, which can naturally limit the position of the lower support sliding unit 4.

[0041] Based on the above improvements, the preferred embodiment of this application performs the following operations:

[0042] When hoisting the template device 100, it is hoisted by the hoisting rod 10. The upper support sliding unit 3 rises to the upper limit position with the hoisting rod 10. The template unit 1 corresponding to the upper support sliding unit 3 swings downward, and the other template units 1 also swing downward, so that the template units 1 are in a contracted state, achieving the purpose of overall shrinkage. In this way, the template device 100 can be successfully hoisted into the deep hole.

[0043] After the template device 100 is hoisted into the bottom of the hole, the hoisting rod 10 is lowered. The upper support sliding unit 3 and the lower support sliding unit 4 move downward under the action of gravity, overcoming the friction between the bottom of the pit and the template unit 1. The template unit 1 unfolds automatically. This position can be taken as the lower limit position of the upper support sliding unit 3.

[0044] Insert the lower pin 7 into the positioning hole of the central frame 2 to restrict the template unit 1 in the unfolded state;

[0045] After the deep hole retaining wall 200 reaches the required strength, the lower pin 7 is pulled out, and the formwork device 100 is lifted by the lifting rod 10. The upper support sliding unit 3 moves upward first, causing its corresponding formwork unit 1 to be demolded. Then, the formwork corresponding to the lower support sliding unit 4 is lifted and demolded as well. At the same time, the formwork unit 1 shrinks inward, reducing its size, and can be quickly lifted out. This completes the pouring of one section of the deep hole retaining wall 200.

[0046] Due to precision issues, when template unit 1 is deployed and supported, there is usually a certain gap between adjacent template units 1, such as... Figure 1 As shown, in order to prevent grout leakage, an L-shaped slot 101 is provided near the side of the template unit 1. The L-shaped slots 101 of adjacent template units 1 are positioned correspondingly and a baffle 102 spanning the template unit 1 is provided in the L-shaped slot 101, thereby ensuring that the template unit 1 is fully deployed, increasing the overall stability of the template device 100 and preventing grout leakage.

[0047] In terms of the circumferential direction, the number of template units 1 can be set as needed, for example, four, six, eight, etc., or even an odd number. In the preferred embodiment of this application, such as... Figure 1-3 As shown, each support plate 8 of the upper support sliding unit 3 and each support plate 8 of the lower support sliding unit 4 are symmetrically connected to two support rods 5, and the support rods 5 of the upper support sliding unit 3 and the lower support sliding unit 4 form a cross-shaped arrangement. There are four template units 1, each connected to the outer end of the cross-shaped arrangement of support rods 5. That is, the upper support sliding unit 3 controls two symmetrical template units 1, and the lower support sliding unit 4 controls two other template units 1 in the vertical direction. The four template units 1 constitute a complete template.

[0048] Although each template unit 1 can be supported by a strut 5, its stability is not high. To improve stability, such as... Figure 1-3 As shown, both the upper support sliding unit 3 and the lower support sliding unit 4 are provided with two support plates 8 along their vertical axes. The upper and lower support plates 8 of the upper support sliding unit 3 are connected by a connector 9, and the upper and lower support plates 8 of the lower support sliding unit 4 are connected by a connector 9. The same template unit 1 is connected to the upper and lower support plates 8 of the upper support sliding unit 3 or the lower support sliding unit 4 by two upper and lower support rods 5, thereby improving the stability of the formwork and preventing the template unit 1 from shifting. The connector 9 can be a screw and nut, with the support plates 8 clamped between the nuts, which also allows for adjustment of the position of the support plates 8.

Claims

1. A method for supporting the formwork device for deep underground borehole wall protection, characterized in that, The template device includes a template unit (1), a central frame (2), an upper support sliding unit (3), and a lower support sliding unit (4). The upper support sliding unit (3) includes at least one support plate (8). The upper support sliding unit (3) is sleeved on the central frame (2) through the support plate (8) and can slide up and down along the central frame (2). The lower support sliding unit (4) includes at least one support plate (8). The lower support sliding unit (4) is sleeved on the central frame (2) through the support plate (8) and can slide up and down along the central frame (2). The upper support sliding unit (3) is located above the lower support sliding unit (4). The support plate (8) of the upper support sliding unit (3) and the support plate (8) of the lower support sliding unit (4) are both hinged with a strut (5). Each strut (5) is hinged to the template unit (1). Each template unit (1) unfolds to form a complete template. The bottom of the central frame (2) is provided with a stop structure (202) for limiting the upper support sliding unit (3) and the lower support sliding unit (4). A hanger (10) is provided above the central frame (2); The upper support sliding unit (3) is provided with a movable hanging plate (301) at the top. The movable hanging plate (301) is connected to the support plate (8) of the upper support sliding unit (3) through a connector (9). The hanging rod (10) is connected to the movable hanging plate (301). The central frame (2) is provided with a limiting structure for limiting the upper support sliding unit (3) at the top. The formwork support method includes the following steps: With the template unit (1) in a retracted state, the template device is hoisted to the bottom of the hole; The upper support sliding unit (3) and the lower support sliding unit (4) move, causing the template unit (1) to unfold and achieve formwork support; After the deep hole wall is poured to meet the strength requirements, the upper support sliding unit (3) and the lower support sliding unit (4) move, and the template unit (1) shrinks to complete the demolding.

2. The formwork support method for the formwork device for underground deep hole wall protection as described in claim 1, characterized in that: The movable hanging plate (301) is provided with a pin hole, and the top of the central frame (2) is provided with a long slot (201) along the vertical direction. The limiting structure is an upper pin (6). The upper pin (6) passes through the pin hole and the long slot (201). The hanging rod (10) is connected to the upper support sliding unit (3) through the upper pin (6).

3. The formwork support method for the formwork device for underground deep hole retaining wall as described in claim 1 or 2, characterized in that: The central frame (2) is provided with a positioning hole, which is located above the support plate (8) of the upper support sliding unit (3) in the unfolded state of the template unit (1). The positioning hole is provided with a lower pin (7) for restricting the template unit (1) in the unfolded state.

4. The formwork support method for the formwork device for underground deep hole wall protection as described in claim 1, characterized in that: The template unit (1) is provided with an L-shaped slot (101) near the side. The L-shaped slots (101) of adjacent template units (1) are positioned correspondingly and a baffle (102) spanning the template unit (1) is provided in the L-shaped slot (101).

5. The formwork support method for the template device for underground deep hole retaining wall as described in claim 1 or 2, characterized in that: Each of the individual support discs (8) of the upper support sliding unit (3) and the individual support discs (8) of the lower support sliding unit (4) are symmetrically connected with two struts (5), and the struts (5) of the upper support sliding unit (3) and the struts (5) of the lower support sliding unit (4) are arranged in a cross shape. The number of template units (1) is four, and the four template units (1) are respectively connected to the outer ends of the struts (5) arranged in a cross shape.

6. The formwork support method for the formwork device for underground deep hole wall protection as described in claim 5, characterized in that: The upper support sliding unit (3) and the lower support sliding unit (4) are each provided with two support plates (8) along the vertical direction. The upper and lower support plates (8) of the upper support sliding unit (3) are connected by a connector (9). The upper and lower support plates (8) of the lower support sliding unit (4) are connected by a connector (9). The same template unit (1) is connected to the upper and lower support plates (8) of the upper support sliding unit (3) or the lower support sliding unit (4) by two upper and lower support rods (5).

7. The formwork support method as described in claim 1, characterized in that, A hanging rod (10) is provided above the central frame (2), and a movable hanging plate (301) is provided on the top of the upper support sliding unit (3). The movable hanging plate (301) is connected to the support plate (8) of the upper support sliding unit (3) through a connector (9). The hanging rod (10) is connected to the movable hanging plate (301). A limiting structure for limiting the upper support sliding unit (3) is provided on the top of the central frame (2). A pin hole is provided on the movable hanging plate (301). A long slot hole (201) is provided vertically on the top of the central frame (2). The limiting structure is an upper pin (6). The upper pin (6) passes through the pin hole and the long slot hole (201). The hanging rod (10) is connected to the upper support sliding unit (3) through the upper pin (6). When hoisting the template device, it is hoisted by the hoisting rod (10). The upper support sliding unit (3) rises to the upper limit position with the hoisting rod (10). The template unit (1) corresponding to the upper support sliding unit (3) swings downward, and the other template units (1) also swing downward, so that the template unit (1) is in a contracted state. After the template device is hoisted into the bottom of the hole, the hoisting rod (10) is lowered, and the upper support sliding unit (3) and the lower support sliding unit (4) move downward under the action of gravity, and the template unit (1) automatically unfolds. Insert the lower pin (7) into the positioning hole of the central skeleton (2) to restrict the template unit (1) in the unfolded state; After the deep hole wall is poured to meet the strength requirements, the lower pin (7) is pulled out. After the formwork device is lifted by the lifting rod (10), the upper support sliding unit (3) moves up first, so that the corresponding formwork unit (1) is demolded. Then the lower support sliding unit (4) is lifted and the corresponding formwork is also demolded.

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