CN108867651A - A kind of pervious concrete well casing mounting device for base pit dewatering - Google Patents

Abstract

The invention provides a permeable concrete well pipe installation device suitable for foundation pit dewatering, comprising: a crane, a hoisting device, a guiding device and a positioning device; and make the base move up and down coaxially along the inner wall of the dewatering well; the sealing ring is coaxially installed and fixed with the base; the guide device includes a guide tube and a positioning column, and the lower end of the guide tube passes through the seal ring and the positioning column during hoisting. The base is detachable and installed coaxially; the part of the guide pipe exposed to the dewatering well is positioned by the positioning column so that the upper end of the guide pipe remains coaxial with the base; the crane is connected to the permeable concrete well pipe through a hoisting device. The key point is the coaxial line between the permeable concrete well pipe and the dewatering well. The invention can realize fast and accurate installation of the downwater well pipes, ensure the sealing between each section of the well pipes, and has wide practicability.

Description

A permeable concrete well pipe installation device for foundation pit dewatering

technical field

The invention relates to the technical field of hoisting devices in construction engineering, in particular to a permeable concrete well pipe installation device for foundation pit dewatering.

technical background

In recent years, with the gradual increase of high-rise buildings, the foundations of buildings are buried deeper and deeper, and engineering construction often requires construction in aquifers, so most of them involve foundation pit precipitation. In order to improve the dewatering efficiency, multiple dewatering wells are arranged in the foundation pit to reduce the groundwater level and improve the construction safety. At present, a large number of permeable materials are used in the well pipes of precipitation wells, mainly including sand-free pipes and permeable concrete. The traditional installation method of dewatering well pipe mainly relies on labor, and the tools mainly include rope slides and wire ropes. The construction process: burying log rope slides, erecting working platforms and lowering pipes. During the construction process, the steel wire rope passes through the bottom of the bottom section of the dewatering well pipe, and the rest of the well pipes are stacked on top of it. The steel wire rope bears a large load, and its retraction is difficult to control; the positioning and guiding device for the dewatering well pipe is not installed, and precipitation is prone to occur Problems such as the inclination of the well pipe, sticking to the wall, and uneven filter material; the process is cumbersome, the construction efficiency is low, and the construction time is long, which may easily lead to deformation and collapse of the well hole. The invention designs a dewatering well pipe installation device, which is equipped with positioning and guiding devices to ensure that the dewatering well pipe is installed in the center of the well hole, and uses an electric hoist to lower the dewatering well pipe, which greatly improves the construction efficiency and has important practical significance.

Contents of the invention

The purpose of the present invention is to solve the problems existing in the prior art, and provide a simple structure, convenient operation, accurate positioning, safe and efficient permeable concrete well pipe installation device for foundation pit dewatering.

In order to achieve the above object, the technical solution of the present invention is:

A permeable concrete well pipe installation device for foundation pit dewatering, comprising: a crane, a hoisting device, a guiding device and a positioning device;

The positioning device includes a sealing ring and a base, the size of the base is adapted to the size of the section of the dewatering well, and the base moves up and down coaxially along the inner wall of the dewatering well; the sealing ring and the base are coaxially installed and fixed;

The guide device includes a guide tube and a positioning column. When hoisting, the lower end of the guide tube is detachably installed coaxially with the base through a sealing ring; the part of the guide tube exposed to the dewatering well is positioned by the positioning column so that the upper end of the guide tube remains coaxial with the base The positioning column is a shrinkable structure, and the positioning column shrinks when the hoisted permeable concrete well pipe descends along the outer wall of the guide pipe;

The crane is installed next to the dewatering well, and the crane is connected with the permeable concrete well pipe through a hoisting device. When hoisting, the crane hooks the bearing point, the permeable concrete well pipe and the dewatering well are coaxial.

As a preferred embodiment of the present invention, in order to achieve stable, fast and convenient hoisting of the permeable concrete well pipe: the hoisting device includes a mounting plate, an electric hoist and a lifting ring, and the mounting plate is suspended on a crane hook through a sling; The electric hoist is arranged on both sides of the installation plate and distributed symmetrically. The reel of the electric hoist is provided with a steel wire rope; One end passes through the suspension ring on the downwater well pipe and then turns and is detachably installed on the mounting plate.

In order to prevent external silt from entering the pipe, the further improvement of the present invention is that a geotextile is provided, the sealing ring is divided into an upper sealing ring and a lower sealing ring, and the geotextile is fixed around the upper sealing ring and the lower sealing ring .

As a further improvement of the present invention, the upper sealing ring is a hollow truncated cone structure, and the lower sealing ring is a ring structure, thereby ensuring the installation of the guide tube.

As a further improvement of the present invention, the lower end of the guide tube and the upper sealing ring are installed with an interference fit.

In order to realize fast and accurate positioning of the guide tube, there are at least three positioning columns, which are evenly distributed around the guide tube, and the deviation orientation can be adjusted at any time as needed.

As a further improvement of the present invention, the size of the section of the guide pipe is adapted to the section size of the permeable concrete well pipe, so that the permeable concrete well pipe is sleeved on the guide pipe and moves up and down coaxially along the outer wall of the guide pipe.

As a further improvement of the present invention, a sand layer is provided under the base of the positioning device.

In order to ensure the smooth connection of the hoisting device, as a further improvement of the present invention, the mounting plate is provided with at least four center-symmetrically distributed hanging rings, and the mounting board realizes the connection of the hoisting device through the connection of the hanging rope and the hanging rings. Hoisting.

The beneficial effect of the present invention is that: the present invention can not only reduce the hoisting procedure of the dewatering well pipe, improve the construction efficiency, but also use the positioning pipe to pre-position the dewatering well pipe, effectively reducing the sticking of the dewatering well pipe and uneven filter material, etc. At the same time, a sealing gasket is set on the top of the dewatering well pipe to realize the sealing between the well pipes and prevent external sediment from entering the inside of the well pipe, thereby ensuring the drainage effect of the dewatering well pipe. The utility model has the advantages of simple structure, high hoisting efficiency, low failure rate, low investment and wide practicability.

Description of drawings

Fig. 1 is a structural schematic diagram of a permeable concrete well pipe installation device for foundation pit dewatering according to the present invention.

Fig. 2 is a schematic structural diagram of the positioning device in the present invention.

In the figure: crane-1, dewatering well-2, mounting plate-3, electric hoist-4, wire rope-5, sealing washer-6, lifting ring-7, permeable concrete dewatering well pipe-8, positioning column-9, guide pipe -10, sling-11, upper sealing ring-12, lower sealing ring-13, screw-14, geotextile-15, base-16, coarse sand layer-17.

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the permeable concrete well pipe installation device for foundation pit dewatering is mainly composed of a mounting plate 3, an electric hoist 4, a steel wire rope 5, a lifting ring 7, a positioning column 9, a guide pipe 10, a lifting rope 11, an upper sealing ring 12, a lower Sealing ring 13, geotextile 15, base 16 constitute.

As shown in Figure 1, the hoisting device is arranged above the dewatering well 2, including a mounting plate 3, two electric hoists 4, a wire rope 5 and two lifting rings 7, wherein four hanging rings are symmetrically arranged on the mounting plate 3, and are 11 is suspended on the hook of the crane 1, the electric hoist 4 is fixed on both sides of the installation plate 3, the suspension ring 7 is vertically corresponding to the position of the electric hoist 4, one end of the steel wire rope 5 bypasses the electric hoist drum, and the other end passes through the permeable concrete dewatering well pipe 8 After the lifting ring 7 is fixed below the mounting plate 3 by the pin shaft, the pin shaft is removed after the permeable concrete dewatering well pipe 8 is hoisted in place to realize the recovery of the steel wire rope 5. The sliding of the steel wire rope 5 is realized, and the sealing washer 6 is installed on the inner side of the upper mouth of the permeable concrete dewatering well pipe 8, so as to realize the sealing of two adjacent joints of the well pipe.

As shown in Figure 2, the positioning device includes an upper sealing ring 12, a lower sealing ring 13, a screw 14, a geotextile 15 and a base 16, the upper sealing ring 12 and the lower sealing ring 13 are fixed on the base 16 by screws 14, and the geotextile 15 The screw 14 is fixed between the upper sealing ring 12 and the lower sealing ring 13 to ensure that the large particles of silt outside the permeable concrete downwater well pipe 8 will not enter the inside of the downwater well pipe. Wherein, the cross-sectional size of the base 16 is adapted to the cross-sectional size of the dewatering well, and the base 16 is moved up and down coaxially along the inner wall of the dewatering well 2, thereby realizing the positioning of the center of the base. In this embodiment, the upper sealing ring 12 is a hollow truncated cone structure, and the lower sealing ring 13 is a ring structure.

As shown in Figure 1, the guide device includes a guide tube 10 and a positioning column 9, wherein the upper end of the guide tube 10 is exposed to the part of the dewatering well and is positioned at the coaxial center position with the dewatering well through the positioning column 9, and the lower end of the guide tube 10 is connected to the upper sealing ring 12 The interference fit connection realizes the central positioning of the guide pipe 10 at the bottom of the dewatering well; at the same time, after all the permeable concrete dewatering well pipes 8 are hoisted, the self-weight of the permeable concrete dewatering well pipe 8 is used to realize the separation of the two. In this embodiment, the three positioning columns are evenly arranged around the guide tube 10 respectively, which can adopt structures such as oil cylinders, air cylinders or screw rods. One end of the positioning column 9 is hinged on the ground, and the telescopic end is hinged on the guide tube 10 through a movable pin. When the permeable concrete dewatering well pipe 8 is hoisted downward, the movable pin shaft is taken off to realize the separation of the positioning column 9 and the guide pipe 10, ensuring that the permeable concrete dewatering well pipe 8 passes through the dewatering wellhead.

As shown in Figure 1, the working process of the permeable concrete well pipe installation device for foundation pit dewatering: after the drilling is completed, the sand layer is filled to the bottom of the well. In this embodiment, coarse sand is used to form a coarse sand layer 17 as a filter layer; After the lower port is connected with the upper sealing ring 12 of the positioning device, lower the guide pipe 10 along the well wall. 16 fits with the well wall to realize the positioning of the guide pipe 10 at the center of the well bottom;

After the lower end of the guide pipe 10 is positioned and connected, a level is placed on the upper mouth of the guide pipe 10, and the position of the guide pipe 10 is adjusted through the expansion and contraction of the positioning column 9, so as to realize the positioning of the guide pipe 10 at the axis of the dewatering well; Install sealing gasket 6 on the inner side of the upper opening of 8, install the lifting ring 7 on the outer side of the upper opening of the permeable concrete dewatering well pipe 8 by using steel wire, one end of the steel wire rope 5 passes through the lifting ring 7, and use the movable pin to fix the steel wire rope 5 under the mounting plate 3; 1 Lift the permeable concrete dewatering well pipe 8 above the guide pipe 10, adjust the position of the permeable concrete dewatering well pipe 8, realize the coaxiality between the permeable concrete dewatering well pipe 8 and the guide pipe 10, and lower the hook on the crane 1 to realize the permeable concrete dewatering well pipe 8. The lower end part is set on the guide pipe 10 to keep the position of the hook on the crane 1;

Put away the positioning column 9, start the electric hoist 4, realize the lowering of the permeable concrete dewatering well pipe 8, and reset the positioning column 9 after all the permeable concrete dewatering well pipes 8 enter the dewatering well; wait for the permeable concrete dewatering well pipe 8 to be hoisted in place Finally, close the electric hoist 4, take out the movable pin shaft below the mounting plate 3, reverse the electric hoist 4, and realize the recovery of the wire rope 5; The gaps are filled with filter material and clay, and the outside of the wellhead is tapped with clay; finally, the guide tube 10 is rotated forward and reverse three times each, and the guide tube 10 is pulled out upward.

Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, and the preferred embodiments of the present invention are shown in the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein, on the contrary, these embodiments are provided for the purpose of making the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Claims (9)

1. a kind of pervious concrete well casing mounting device for base pit dewatering, which is characterized in that including：Crane, lifting dress It sets, guiding device and positioning device；The positioning device includes sealing ring and pedestal, and the pedestal size and dewatering well section are big It is small to be adapted, and move up and down pedestal coaxially along dewatering well inner wall；The sealing ring and pedestal are co-axially mounted fixation；It is described Guiding device includes guide pipe, positioning column, and when lifting, the guide pipe lower end was detachably co-axially mounted by sealing ring with pedestal； The guide pipe exposes dewatering well part makes guide pipe upper end keep coaxial with pedestal by positioning column positioning；The positioning column is Retractable structure, when the pervious concrete well casing of lifting is along guiding pipe outer wall decline, positioning column is shunk；The crane peace By dewatering well, the crane is connect by hanging apparatus with pervious concrete well casing, and when lifting, the crane is linked up with Supporting point, pervious concrete well casing and dewatering well coaxial line.

2. mounting device according to claim 1, which is characterized in that the hanging apparatus includes mounting plate, electric block And hanging ring, the mounting plate are suspended on crane hook by lifting rope；Electric block setting mounting plate two sides simultaneously It is symmetric, the reel of electric block is equipped with wirerope；The hanging ring and electric block position are vertical corresponding to be mounted on On water coagulation soil well casing upper port outer；When lifting, described wirerope one end is turned round after passing through the hanging ring on downcast well pipe and can Disassembly installation is on a mounting board.

3. mounting device according to claim 1, which is characterized in that be equipped with geotextiles, the sealing ring is divided into sealing Circle and lower seal, the geotextiles surrounding are fixed between upper seal and lower seal.

4. mounting device according to claim 3, which is characterized in that the upper seal is hollow circular cone structure, Lower seal is circular ring structure.

5. mounting device according to claim 4, which is characterized in that be between the guide pipe lower end and upper seal It is full of and is coupled.

6. mounting device according to claim 1, which is characterized in that the positioning column quantity at least three, and uniformly It is distributed in guide pipe surrounding.

7. mounting device according to claim 1, which is characterized in that the guide pipe cross-sectional sizes and pervious concrete well Tube section size is adapted, and pervious concrete well casing is made to be socketed on guide pipe and move up and down along guide pipe wall coaxial.

8. mounting device according to claim 1, which is characterized in that layer of sand is arranged below in the pedestal of the positioning device.

9. mounting device according to claim 2, which is characterized in that it is in center pair that the mounting plate, which is equipped at least four, Claim the link of distribution, the mounting plate realizes the lifting of hanging apparatus by the connection of lifting rope and link.