CN209907417U

CN209907417U - Open caisson construction structure utilizing counter-force

Info

Publication number: CN209907417U
Application number: CN201920540675.3U
Authority: CN
Inventors: 潘金龙; 王智群
Original assignee: GEOTECHNICAL TECHNOLOGY Co Ltd
Current assignee: GEOTECHNICAL TECHNOLOGY Co Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-01-07
Anticipated expiration: 2029-04-19

Abstract

The utility model relates to an utilize open caisson construction structures of counter-force has solved the open caisson and has sunk the problem of difficulty because buoyancy, resistance reason at sand and soil and mucky soil layer. This structure includes the open caisson, the both sides of every open caisson wall of open caisson all set up many anchor ropes, the bottom anchor of anchor rope is in underground bedrock, and the anchor rope one-to-one of open caisson wall both sides sets up, is provided with the crossbeam board between the anchor rope of correspondence, crossbeam board both ends set up the through-hole that supplies the anchor rope to pass respectively, are equipped with respectively on the anchor rope of crossbeam board both ends top to be used for embracing the fixed anchor rope ground tackle of clamp, the crossbeam board is located the top of the open caisson wall of caisson, is provided with the jack between crossbeam board and the open caisson wall. The utility model utilizes the counter force to press down the open caisson for construction, and applies continuous anti-floating down force to the open caisson after the open caisson sinking construction is completed; the utility model discloses need not to set up the through-hole on the sinking well wall, guarantee structure safety, the interval that corresponds the anchor rope moreover allows to produce the small displacement of sinking well.

Description

Open caisson construction structure utilizing counter-force

Technical Field

The utility model belongs to the municipal works field relates to an open caisson construction structures, in particular to utilize open caisson construction structures of counter-force.

Background

The common open caisson construction method is that firstly, an open caisson is made on the earth surface, then the open caisson is gradually sunk under the action of self weight by continuously digging earth from the open caisson under the enclosure of the well wall, and after the preset design elevation is reached, the bottom sealing is carried out, and the internal structure is constructed. In the conventional open caisson construction process, the frictional resistance between the outer well wall and the soil body is gradually increased, and the sinking depth is limited. In some soil bodies, such as sandy soil and mucky soil layers, sinking is difficult due to the influence of soil quality, and external sinking-assisting measures are needed to ensure that the open caisson sinks in place. The auxiliary measures of the open caisson mainly comprise methods of water jetting sinking, thixotropic slurry sleeve sinking, ballast sinking, air curtain sinking and the like, and the measures can enable the large open caisson to stably sink, but the requirements on construction sites are large, and the deviation rectification of the open caisson is difficult. The open caisson construction needs to solve the problem of difficult sinking and also needs to ensure the anti-floating capability after the open caisson construction is finished. The open caisson sinks underground, can be pressurized by soil bodies for a long time, and the bottom of the open caisson can float upwards gradually in the using process due to the buoyancy generated by the action of underground water, so that the open caisson has the anti-floating capacity.

The application number CN108487283A of Chinese patent published in 2018, 9, 4 and is named as a pile anchor press-in type sinking construction method for a sunk well. The device is used for perforating the existing open caisson wall, so that the structure of the open caisson wall is changed, and potential safety hazards exist in the open caisson structure; moreover, the lateral micro displacement of the open caisson can cause the dislocation of the anchor cable and the through hole, so that the anchor cable and the wall of the through hole are rubbed, and the structure of the open caisson is damaged.

Disclosure of Invention

The utility model aims to solve the open caisson because buoyancy, resistance reason sink the problem of difficulty in sand and soil and mucky soil layer, provide an utilize open caisson construction structures of counter-force, not only can utilize the anchor rope to form the counter force and assist the open caisson to sink. The utility model discloses do not change the original structure of open caisson, and have higher fault-tolerance to the micro displacement of open caisson.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an utilize open caisson construction structures of counter-force, includes the open caisson, the open caisson all around sets up a plurality of vertical platelike open caisson walls with the middle part, its characterized in that: the both sides of every sinking well wall all set up many anchor ropes, the bottom anchor of anchor rope is in underground bedrock, and the anchor rope one-to-one of sinking well wall both sides sets up, is provided with the crossbeam board between the anchor rope that corresponds, crossbeam board both ends set up the through-hole that supplies the anchor rope to pass respectively, are equipped with respectively on the anchor rope of crossbeam board both ends top to be used for embracing the fixed anchor rope ground tackle of pressing from both sides, the crossbeam board is located the top of the sinking well wall, is provided with the jack between crossbeam board and the sinking well wall. This device sets up the anchor rope in the both sides of open caisson wall, and the anchor rope lower extreme is squeezed into the basement rock of soil layer below and is anchored, through the last support of crossbeam board as the jack, and the end top is established on the crossbeam board on the jack, utilizes the pressure of jacking to push down the open caisson construction to exert the anti buoyancy of continuation to the open caisson after the open caisson construction of sinking is accomplished. The device does not need to arrange a through hole on the sinking well wall, so that the structure safety is ensured; and moreover, the gap between the anchor cable and the wall of the sinking well is larger than the aperture of the through hole in the mode that the through hole penetrates through the anchor cable, and the anchor cable cannot interfere with the wall of the sinking well when the sinking well is slightly displaced.

Preferably, the open caisson is divided into a plurality of sections, each section of open caisson is sequentially and independently sunk for construction, a soil plug is left at the bottom in the open caisson of the lowest section, and the top surface of the soil plug is 3-5 m away from the lower end of the wall of the open caisson. The open caisson can be divided into a plurality of sections, the construction is sequentially carried out by pressing, and after the next open caisson is sunk in place, the construction is carried out by pressing the previous open caisson. The soil plug of the lowest section prevents the soil mass at the bottom of the open caisson from surging due to the disturbance of the open caisson construction to the underground soil mass.

Preferably, the jack is single or a plurality of jacks stacked up and down. The jack can be used singly or can be connected in series to improve one-time jacking stroke.

Preferably, the anchor cable anchorage device comprises an outer sleeve and an inner sleeve, wherein the middle part of the outer sleeve is provided with a tapered hole with a large upper part and a small lower part, the outer wall of the inner sleeve is provided with an inverted conical surface, the inner sleeve is clamped on the anchor cable, and the lower end of the side wall of the inner sleeve is upwards provided with an elastic groove. The outer sleeve and the inner sleeve adopt a conical self-locking structure and are firmly clamped on the anchor cable to provide the upper locking force of the cross beam plate.

Preferably, a spiral groove or a plurality of annular grooves connected up and down are formed in a middle hole in the outer wall of the inner sleeve embracing clamp anchor cable. The inner wall of the inner sleeve adopts a spiral groove or ring grooves which are connected up and down, so that the clamping force is increased.

The utility model depends on the anchor cable and the beam plate, utilizes the counter-force provided by the jack to press down the open caisson for construction, and applies continuous anti-floating pressure to the open caisson after the open caisson sinking construction is completed; the utility model does not need to provide a through hole on the sinking well wall, thereby ensuring the structure safety; and moreover, the gap between the anchor cable and the wall of the sinking well is larger than the aperture of the through hole in the mode that the through hole penetrates through the anchor cable, and the anchor cable cannot interfere with the wall of the sinking well when the sinking well is slightly displaced.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a side view schematic structure diagram of the construction process of the bottom open caisson of the utility model.

Fig. 3 is a schematic view of the anchor cable and anchor device of the present invention.

In the figure: 1. the sinking well wall comprises a sinking well wall body 2, an anchor rope 3, a cross beam plate 4, a jack 5, an anchor rope anchorage device 6, an outer sleeve 7, an inner sleeve 8, an elastic groove 9 and a spiral groove.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Example (b): an open caisson construction structure using reaction force is shown in figures 1 and 2. This construction structures includes the open caisson, the open caisson cross section is the field font, and every 1 both sides of the wall of the caisson all set up many anchor ropes 2, the bottom anchor of anchor rope is in underground bedrock, and 2 one-to-ones settings of anchor rope of each 1 both sides of the wall of the caisson are provided with crossbeam board 3 between the anchor rope that corresponds.

As shown in fig. 2, through holes for the anchor cables to pass through are respectively formed in two ends of the cross beam plate, anchor cable anchors 5 for holding and clamping are respectively arranged on the anchor cables above the two ends of the cross beam plate, the cross beam plate is located above the sinking well wall, and a jack 4 is arranged between the cross beam plate and the sinking well wall, and the jack can be single or stacked up and down to be connected in series. The open caisson is divided into a plurality of sections, each section of open caisson is sequentially and independently sunk for construction, after the lower open caisson is sunk in place, the open caisson is placed into the upper section of open caisson for construction, at the moment, the cross beam plate needs to be dismantled, the open caisson wall is sleeved between the two anchor cables, and then the cross beam plate is fixed again. And a soil plug 10 is reserved at the bottom in the sunk well of the lowest section, and the top surface of the soil plug is 3-5 m away from the lower end of the sunk well wall.

As shown in fig. 3, the anchor device 5 includes an outer sleeve 6 and an inner sleeve 7, wherein the middle of the outer sleeve is provided with a tapered hole with a large top and a small bottom, the outer wall of the inner sleeve is inverted to a tapered surface, the inner sleeve is clamped on the anchor cable, and the lower end of the side wall of the inner sleeve is provided with an elastic groove 8 upwards. The middle hole of the outer wall of the inner sleeve embracing clamp anchor cable is provided with a spiral groove or a plurality of annular grooves which are connected up and down.

This scheme sets up the anchor rope in the both sides of open caisson wall, supports as the last of jack through the crossbeam board, and the jack top end top is established on the crossbeam board, utilizes the pressure of jacking to push down the open caisson construction to exert the anti buoyancy of continuation to the open caisson after the open caisson sinking construction is accomplished. The device does not need to arrange a through hole on the sinking well wall, so that the structure safety is ensured; and moreover, the gap between the anchor cable and the wall of the sinking well is larger than the aperture of the through hole in the mode that the through hole penetrates through the anchor cable, and the anchor cable cannot interfere with the wall of the sinking well when the sinking well is slightly displaced.

Claims

1. The utility model provides an utilize open caisson construction structures of counter-force, includes the open caisson, the open caisson all around sets up a plurality of vertical platelike open caisson walls with the middle part, its characterized in that: the both sides of every sinking well wall all set up many anchor ropes, the bottom anchor of anchor rope is in underground bedrock, and the anchor rope one-to-one of sinking well wall both sides sets up, is provided with the crossbeam board between the anchor rope that corresponds, crossbeam board both ends set up the through-hole that supplies the anchor rope to pass respectively, are equipped with respectively on the anchor rope of crossbeam board both ends top to be used for embracing the fixed anchor rope ground tackle of pressing from both sides, the crossbeam board is located the top of the sinking well wall, is provided with the jack between crossbeam board and the sinking well wall.

2. The open caisson construction Structure Using counterforce according to claim 1, wherein: the open caisson is divided into a plurality of sections, each section of open caisson is sequentially and independently sunk for construction, a soil plug is left at the bottom in the open caisson of the lowest section, and the height from the top surface of the soil plug to the lower end of the open caisson wall is 3-5 m.

3. The open caisson construction Structure Using counterforce according to claim 1, wherein: the jack is single or a plurality of jacks stacked up and down.

4. A caisson construction Structure Using counterforce, according to claim 1, 2 or 3, wherein: the anchor cable anchorage device comprises an outer sleeve and an inner sleeve, wherein the middle part of the outer sleeve is provided with a tapered hole with a large upper part and a small lower part, the outer wall of the inner sleeve is provided with an inverted conical surface, the inner sleeve is clamped on the anchor cable, and the lower end of the side wall of the inner sleeve is upwards provided with an elastic groove.

5. The open caisson construction Structure Using counterforce, according to claim 4, wherein: a spiral groove or a plurality of annular grooves connected up and down are formed in a middle hole in the outer wall of the inner sleeve embracing clamp anchor cable.